-/* ltdl.c -- system independent dlopen wrapper
- Copyright (C) 1998, 1999, 2000, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
- Originally by Thomas Tanner <tanner@ffii.org>
- This file is part of GNU Libtool.
-
-This library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Lesser General Public
-License as published by the Free Software Foundation; either
-version 2 of the License, or (at your option) any later version.
-
-As a special exception to the GNU Lesser General Public License,
-if you distribute this file as part of a program or library that
-is built using GNU libtool, you may include it under the same
-distribution terms that you use for the rest of that program.
-
-This library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-Lesser General Public License for more details.
-
-You should have received a copy of the GNU Lesser General Public
-License along with this library; if not, write to the Free Software
-Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301 USA
-
-*/
-
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
-#if HAVE_STDIO_H
-# include <stdio.h>
-#endif
-
-/* Include the header defining malloc. On K&R C compilers,
- that's <malloc.h>, on ANSI C and ISO C compilers, that's <stdlib.h>. */
-#if HAVE_STDLIB_H
-# include <stdlib.h>
-#else
-# if HAVE_MALLOC_H
-# include <malloc.h>
-# endif
-#endif
-
-#if HAVE_STRING_H
-# include <string.h>
-#else
-# if HAVE_STRINGS_H
-# include <strings.h>
-# endif
-#endif
-
-#if HAVE_CTYPE_H
-# include <ctype.h>
-#endif
-
-#if HAVE_MEMORY_H
-# include <memory.h>
-#endif
-
-#if HAVE_ERRNO_H
-# include <errno.h>
-#endif
-
-
-#ifndef __WINDOWS__
-# ifdef __WIN32__
-# define __WINDOWS__
-# endif
-#endif
-
-
-#undef LT_USE_POSIX_DIRENT
-#ifdef HAVE_CLOSEDIR
-# ifdef HAVE_OPENDIR
-# ifdef HAVE_READDIR
-# ifdef HAVE_DIRENT_H
-# define LT_USE_POSIX_DIRENT
-# endif /* HAVE_DIRENT_H */
-# endif /* HAVE_READDIR */
-# endif /* HAVE_OPENDIR */
-#endif /* HAVE_CLOSEDIR */
-
-
-#undef LT_USE_WINDOWS_DIRENT_EMULATION
-#ifndef LT_USE_POSIX_DIRENT
-# ifdef __WINDOWS__
-# define LT_USE_WINDOWS_DIRENT_EMULATION
-# endif /* __WINDOWS__ */
-#endif /* LT_USE_POSIX_DIRENT */
-
-
-#ifdef LT_USE_POSIX_DIRENT
-# include <dirent.h>
-# define LT_D_NAMLEN(dirent) (strlen((dirent)->d_name))
-#else
-# ifdef LT_USE_WINDOWS_DIRENT_EMULATION
-# define LT_D_NAMLEN(dirent) (strlen((dirent)->d_name))
-# else
-# define dirent direct
-# define LT_D_NAMLEN(dirent) ((dirent)->d_namlen)
-# if HAVE_SYS_NDIR_H
-# include <sys/ndir.h>
-# endif
-# if HAVE_SYS_DIR_H
-# include <sys/dir.h>
-# endif
-# if HAVE_NDIR_H
-# include <ndir.h>
-# endif
-# endif
-#endif
-
-#if HAVE_ARGZ_H
-# include <argz.h>
-#endif
-
-#if HAVE_ASSERT_H
-# include <assert.h>
-#else
-# define assert(arg) ((void) 0)
-#endif
-
-#include "ltdl.h"
-
-#if WITH_DMALLOC
-# include <dmalloc.h>
-#endif
-
-
-
-\f
-/* --- WINDOWS SUPPORT --- */
-
-/* DLL building support on win32 hosts; mostly to workaround their
- ridiculous implementation of data symbol exporting. */
-#ifndef LT_GLOBAL_DATA
-# if defined(__WINDOWS__) || defined(__CYGWIN__)
-# ifdef DLL_EXPORT /* defined by libtool (if required) */
-# define LT_GLOBAL_DATA __declspec(dllexport)
-# endif
-# endif
-# ifndef LT_GLOBAL_DATA /* static linking or !__WINDOWS__ */
-# define LT_GLOBAL_DATA
-# endif
-#endif
-
-/* fopen() mode flags for reading a text file */
-#undef LT_READTEXT_MODE
-#if defined(__WINDOWS__) || defined(__CYGWIN__)
-# define LT_READTEXT_MODE "rt"
-#else
-# define LT_READTEXT_MODE "r"
-#endif
-
-#ifdef LT_USE_WINDOWS_DIRENT_EMULATION
-
-#include <windows.h>
-
-#define dirent lt_dirent
-#define DIR lt_DIR
-
-struct dirent
-{
- char d_name[2048];
- int d_namlen;
-};
-
-typedef struct _DIR
-{
- HANDLE hSearch;
- WIN32_FIND_DATA Win32FindData;
- BOOL firsttime;
- struct dirent file_info;
-} DIR;
-
-#endif /* LT_USE_WINDOWS_DIRENT_EMULATION */
-
-\f
-/* --- MANIFEST CONSTANTS --- */
-
-
-/* Standard libltdl search path environment variable name */
-#undef LTDL_SEARCHPATH_VAR
-#define LTDL_SEARCHPATH_VAR "LTDL_LIBRARY_PATH"
-
-/* Standard libtool archive file extension. */
-#undef LTDL_ARCHIVE_EXT
-#define LTDL_ARCHIVE_EXT ".la"
-
-/* max. filename length */
-#ifndef LT_FILENAME_MAX
-# define LT_FILENAME_MAX 1024
-#endif
-
-/* This is the maximum symbol size that won't require malloc/free */
-#undef LT_SYMBOL_LENGTH
-#define LT_SYMBOL_LENGTH 128
-
-/* This accounts for the _LTX_ separator */
-#undef LT_SYMBOL_OVERHEAD
-#define LT_SYMBOL_OVERHEAD 5
-
-
-
-\f
-/* --- MEMORY HANDLING --- */
-
-
-/* These are the functions used internally. In addition to making
- use of the associated function pointers above, they also perform
- error handling. */
-static char *lt_estrdup LT_PARAMS((const char *str));
-static lt_ptr lt_emalloc LT_PARAMS((size_t size));
-static lt_ptr lt_erealloc LT_PARAMS((lt_ptr addr, size_t size));
-
-/* static lt_ptr rpl_realloc LT_PARAMS((lt_ptr ptr, size_t size)); */
-#define rpl_realloc realloc
-
-/* These are the pointers that can be changed by the caller: */
-LT_GLOBAL_DATA lt_ptr (*lt_dlmalloc) LT_PARAMS((size_t size))
- = (lt_ptr (*) LT_PARAMS((size_t))) malloc;
-LT_GLOBAL_DATA lt_ptr (*lt_dlrealloc) LT_PARAMS((lt_ptr ptr, size_t size))
- = (lt_ptr (*) LT_PARAMS((lt_ptr, size_t))) rpl_realloc;
-LT_GLOBAL_DATA void (*lt_dlfree) LT_PARAMS((lt_ptr ptr))
- = (void (*) LT_PARAMS((lt_ptr))) free;
-
-/* The following macros reduce the amount of typing needed to cast
- assigned memory. */
-#if WITH_DMALLOC
-
-#define LT_DLMALLOC(tp, n) ((tp *) xmalloc ((n) * sizeof(tp)))
-#define LT_DLREALLOC(tp, p, n) ((tp *) xrealloc ((p), (n) * sizeof(tp)))
-#define LT_DLFREE(p) \
- LT_STMT_START { if (p) (p) = (xfree (p), (lt_ptr) 0); } LT_STMT_END
-
-#define LT_EMALLOC(tp, n) ((tp *) xmalloc ((n) * sizeof(tp)))
-#define LT_EREALLOC(tp, p, n) ((tp *) xrealloc ((p), (n) * sizeof(tp)))
-
-#else
-
-#define LT_DLMALLOC(tp, n) ((tp *) lt_dlmalloc ((n) * sizeof(tp)))
-#define LT_DLREALLOC(tp, p, n) ((tp *) lt_dlrealloc ((p), (n) * sizeof(tp)))
-#define LT_DLFREE(p) \
- LT_STMT_START { if (p) (p) = (lt_dlfree (p), (lt_ptr) 0); } LT_STMT_END
-
-#define LT_EMALLOC(tp, n) ((tp *) lt_emalloc ((n) * sizeof(tp)))
-#define LT_EREALLOC(tp, p, n) ((tp *) lt_erealloc ((p), (n) * sizeof(tp)))
-
-#endif
-
-#define LT_DLMEM_REASSIGN(p, q) LT_STMT_START { \
- if ((p) != (q)) { if (p) lt_dlfree (p); (p) = (q); (q) = 0; } \
- } LT_STMT_END
-
-\f
-/* --- REPLACEMENT FUNCTIONS --- */
-
-
-#undef strdup
-#define strdup rpl_strdup
-
-static char *strdup LT_PARAMS((const char *str));
-
-static char *
-strdup(str)
- const char *str;
-{
- char *tmp = 0;
-
- if (str)
- {
- tmp = LT_DLMALLOC (char, 1+ strlen (str));
- if (tmp)
- {
- strcpy(tmp, str);
- }
- }
-
- return tmp;
-}
-
-
-#if ! HAVE_STRCMP
-
-#undef strcmp
-#define strcmp rpl_strcmp
-
-static int strcmp LT_PARAMS((const char *str1, const char *str2));
-
-static int
-strcmp (str1, str2)
- const char *str1;
- const char *str2;
-{
- if (str1 == str2)
- return 0;
- if (str1 == 0)
- return -1;
- if (str2 == 0)
- return 1;
-
- for (;*str1 && *str2; ++str1, ++str2)
- {
- if (*str1 != *str2)
- break;
- }
-
- return (int)(*str1 - *str2);
-}
-#endif
-
-
-#if ! HAVE_STRCHR
-
-# if HAVE_INDEX
-# define strchr index
-# else
-# define strchr rpl_strchr
-
-static const char *strchr LT_PARAMS((const char *str, int ch));
-
-static const char*
-strchr(str, ch)
- const char *str;
- int ch;
-{
- const char *p;
-
- for (p = str; *p != (char)ch && *p != LT_EOS_CHAR; ++p)
- /*NOWORK*/;
-
- return (*p == (char)ch) ? p : 0;
-}
-
-# endif
-#endif /* !HAVE_STRCHR */
-
-
-#if ! HAVE_STRRCHR
-
-# if HAVE_RINDEX
-# define strrchr rindex
-# else
-# define strrchr rpl_strrchr
-
-static const char *strrchr LT_PARAMS((const char *str, int ch));
-
-static const char*
-strrchr(str, ch)
- const char *str;
- int ch;
-{
- const char *p, *q = 0;
-
- for (p = str; *p != LT_EOS_CHAR; ++p)
- {
- if (*p == (char) ch)
- {
- q = p;
- }
- }
-
- return q;
-}
-
-# endif
-#endif
-
-/* NOTE: Neither bcopy nor the memcpy implementation below can
- reliably handle copying in overlapping areas of memory. Use
- memmove (for which there is a fallback implmentation below)
- if you need that behaviour. */
-#if ! HAVE_MEMCPY
-
-# if HAVE_BCOPY
-# define memcpy(dest, src, size) bcopy (src, dest, size)
-# else
-# define memcpy rpl_memcpy
-
-static lt_ptr memcpy LT_PARAMS((lt_ptr dest, const lt_ptr src, size_t size));
-
-static lt_ptr
-memcpy (dest, src, size)
- lt_ptr dest;
- const lt_ptr src;
- size_t size;
-{
- const char * s = src;
- char * d = dest;
- size_t i = 0;
-
- for (i = 0; i < size; ++i)
- {
- d[i] = s[i];
- }
-
- return dest;
-}
-
-# endif /* !HAVE_BCOPY */
-#endif /* !HAVE_MEMCPY */
-
-#if ! HAVE_MEMMOVE
-# define memmove rpl_memmove
-
-static lt_ptr memmove LT_PARAMS((lt_ptr dest, const lt_ptr src, size_t size));
-
-static lt_ptr
-memmove (dest, src, size)
- lt_ptr dest;
- const lt_ptr src;
- size_t size;
-{
- const char * s = src;
- char * d = dest;
- size_t i;
-
- if (d < s)
- for (i = 0; i < size; ++i)
- {
- d[i] = s[i];
- }
- else if (d > s && size > 0)
- for (i = size -1; ; --i)
- {
- d[i] = s[i];
- if (i == 0)
- break;
- }
-
- return dest;
-}
-
-#endif /* !HAVE_MEMMOVE */
-
-#ifdef LT_USE_WINDOWS_DIRENT_EMULATION
-
-static void closedir LT_PARAMS((DIR *entry));
-
-static void
-closedir(entry)
- DIR *entry;
-{
- assert(entry != (DIR *) NULL);
- FindClose(entry->hSearch);
- lt_dlfree((lt_ptr)entry);
-}
-
-
-static DIR * opendir LT_PARAMS((const char *path));
-
-static DIR*
-opendir (path)
- const char *path;
-{
- char file_specification[LT_FILENAME_MAX];
- DIR *entry;
-
- assert(path != (char *) NULL);
- /* allow space for: path + '\\' '\\' '*' '.' '*' + '\0' */
- (void) strncpy (file_specification, path, LT_FILENAME_MAX-6);
- file_specification[LT_FILENAME_MAX-6] = LT_EOS_CHAR;
- (void) strcat(file_specification,"\\");
- entry = LT_DLMALLOC (DIR,sizeof(DIR));
- if (entry != (DIR *) 0)
- {
- entry->firsttime = TRUE;
- entry->hSearch = FindFirstFile(file_specification,&entry->Win32FindData);
- }
- if (entry->hSearch == INVALID_HANDLE_VALUE)
- {
- (void) strcat(file_specification,"\\*.*");
- entry->hSearch = FindFirstFile(file_specification,&entry->Win32FindData);
- if (entry->hSearch == INVALID_HANDLE_VALUE)
- {
- LT_DLFREE (entry);
- return (DIR *) 0;
- }
- }
- return(entry);
-}
-
-
-static struct dirent *readdir LT_PARAMS((DIR *entry));
-
-static struct dirent *readdir(entry)
- DIR *entry;
-{
- int
- status;
-
- if (entry == (DIR *) 0)
- return((struct dirent *) 0);
- if (!entry->firsttime)
- {
- status = FindNextFile(entry->hSearch,&entry->Win32FindData);
- if (status == 0)
- return((struct dirent *) 0);
- }
- entry->firsttime = FALSE;
- (void) strncpy(entry->file_info.d_name,entry->Win32FindData.cFileName,
- LT_FILENAME_MAX-1);
- entry->file_info.d_name[LT_FILENAME_MAX - 1] = LT_EOS_CHAR;
- entry->file_info.d_namlen = strlen(entry->file_info.d_name);
- return(&entry->file_info);
-}
-
-#endif /* LT_USE_WINDOWS_DIRENT_EMULATION */
-
-/* According to Alexandre Oliva <oliva@lsd.ic.unicamp.br>,
- ``realloc is not entirely portable''
- In any case we want to use the allocator supplied by the user without
- burdening them with an lt_dlrealloc function pointer to maintain.
- Instead implement our own version (with known boundary conditions)
- using lt_dlmalloc and lt_dlfree. */
-
-/* #undef realloc
- #define realloc rpl_realloc
-*/
-#if 0
- /* You can't (re)define realloc unless you also (re)define malloc.
- Right now, this code uses the size of the *destination* to decide
- how much to copy. That's not right, but you can't know the size
- of the source unless you know enough about, or wrote malloc. So
- this code is disabled... */
-
-static lt_ptr
-realloc (ptr, size)
- lt_ptr ptr;
- size_t size;
-{
- if (size == 0)
- {
- /* For zero or less bytes, free the original memory */
- if (ptr != 0)
- {
- lt_dlfree (ptr);
- }
-
- return (lt_ptr) 0;
- }
- else if (ptr == 0)
- {
- /* Allow reallocation of a NULL pointer. */
- return lt_dlmalloc (size);
- }
- else
- {
- /* Allocate a new block, copy and free the old block. */
- lt_ptr mem = lt_dlmalloc (size);
-
- if (mem)
- {
- memcpy (mem, ptr, size);
- lt_dlfree (ptr);
- }
-
- /* Note that the contents of PTR are not damaged if there is
- insufficient memory to realloc. */
- return mem;
- }
-}
-#endif
-
-
-#if ! HAVE_ARGZ_APPEND
-# define argz_append rpl_argz_append
-
-static error_t argz_append LT_PARAMS((char **pargz, size_t *pargz_len,
- const char *buf, size_t buf_len));
-
-static error_t
-argz_append (pargz, pargz_len, buf, buf_len)
- char **pargz;
- size_t *pargz_len;
- const char *buf;
- size_t buf_len;
-{
- size_t argz_len;
- char *argz;
-
- assert (pargz);
- assert (pargz_len);
- assert ((*pargz && *pargz_len) || (!*pargz && !*pargz_len));
-
- /* If nothing needs to be appended, no more work is required. */
- if (buf_len == 0)
- return 0;
-
- /* Ensure there is enough room to append BUF_LEN. */
- argz_len = *pargz_len + buf_len;
- argz = LT_DLREALLOC (char, *pargz, argz_len);
- if (!argz)
- return ENOMEM;
-
- /* Copy characters from BUF after terminating '\0' in ARGZ. */
- memcpy (argz + *pargz_len, buf, buf_len);
-
- /* Assign new values. */
- *pargz = argz;
- *pargz_len = argz_len;
-
- return 0;
-}
-#endif /* !HAVE_ARGZ_APPEND */
-
-
-#if ! HAVE_ARGZ_CREATE_SEP
-# define argz_create_sep rpl_argz_create_sep
-
-static error_t argz_create_sep LT_PARAMS((const char *str, int delim,
- char **pargz, size_t *pargz_len));
-
-static error_t
-argz_create_sep (str, delim, pargz, pargz_len)
- const char *str;
- int delim;
- char **pargz;
- size_t *pargz_len;
-{
- size_t argz_len;
- char *argz = 0;
-
- assert (str);
- assert (pargz);
- assert (pargz_len);
-
- /* Make a copy of STR, but replacing each occurrence of
- DELIM with '\0'. */
- argz_len = 1+ LT_STRLEN (str);
- if (argz_len)
- {
- const char *p;
- char *q;
-
- argz = LT_DLMALLOC (char, argz_len);
- if (!argz)
- return ENOMEM;
-
- for (p = str, q = argz; *p != LT_EOS_CHAR; ++p)
- {
- if (*p == delim)
- {
- /* Ignore leading delimiters, and fold consecutive
- delimiters in STR into a single '\0' in ARGZ. */
- if ((q > argz) && (q[-1] != LT_EOS_CHAR))
- *q++ = LT_EOS_CHAR;
- else
- --argz_len;
- }
- else
- *q++ = *p;
- }
- /* Copy terminating LT_EOS_CHAR. */
- *q = *p;
- }
-
- /* If ARGZ_LEN has shrunk to nothing, release ARGZ's memory. */
- if (!argz_len)
- LT_DLFREE (argz);
-
- /* Assign new values. */
- *pargz = argz;
- *pargz_len = argz_len;
-
- return 0;
-}
-#endif /* !HAVE_ARGZ_CREATE_SEP */
-
-
-#if ! HAVE_ARGZ_INSERT
-# define argz_insert rpl_argz_insert
-
-static error_t argz_insert LT_PARAMS((char **pargz, size_t *pargz_len,
- char *before, const char *entry));
-
-static error_t
-argz_insert (pargz, pargz_len, before, entry)
- char **pargz;
- size_t *pargz_len;
- char *before;
- const char *entry;
-{
- assert (pargz);
- assert (pargz_len);
- assert (entry && *entry);
-
- /* No BEFORE address indicates ENTRY should be inserted after the
- current last element. */
- if (!before)
- return argz_append (pargz, pargz_len, entry, 1+ LT_STRLEN (entry));
-
- /* This probably indicates a programmer error, but to preserve
- semantics, scan back to the start of an entry if BEFORE points
- into the middle of it. */
- while ((before > *pargz) && (before[-1] != LT_EOS_CHAR))
- --before;
-
- {
- size_t entry_len = 1+ LT_STRLEN (entry);
- size_t argz_len = *pargz_len + entry_len;
- size_t offset = before - *pargz;
- char *argz = LT_DLREALLOC (char, *pargz, argz_len);
-
- if (!argz)
- return ENOMEM;
-
- /* Make BEFORE point to the equivalent offset in ARGZ that it
- used to have in *PARGZ incase realloc() moved the block. */
- before = argz + offset;
-
- /* Move the ARGZ entries starting at BEFORE up into the new
- space at the end -- making room to copy ENTRY into the
- resulting gap. */
- memmove (before + entry_len, before, *pargz_len - offset);
- memcpy (before, entry, entry_len);
-
- /* Assign new values. */
- *pargz = argz;
- *pargz_len = argz_len;
- }
-
- return 0;
-}
-#endif /* !HAVE_ARGZ_INSERT */
-
-
-#if ! HAVE_ARGZ_NEXT
-# define argz_next rpl_argz_next
-
-static char *argz_next LT_PARAMS((char *argz, size_t argz_len,
- const char *entry));
-
-static char *
-argz_next (argz, argz_len, entry)
- char *argz;
- size_t argz_len;
- const char *entry;
-{
- assert ((argz && argz_len) || (!argz && !argz_len));
-
- if (entry)
- {
- /* Either ARGZ/ARGZ_LEN is empty, or ENTRY points into an address
- within the ARGZ vector. */
- assert ((!argz && !argz_len)
- || ((argz <= entry) && (entry < (argz + argz_len))));
-
- /* Move to the char immediately after the terminating
- '\0' of ENTRY. */
- entry = 1+ strchr (entry, LT_EOS_CHAR);
-
- /* Return either the new ENTRY, or else NULL if ARGZ is
- exhausted. */
- return (entry >= argz + argz_len) ? 0 : (char *) entry;
- }
- else
- {
- /* This should probably be flagged as a programmer error,
- since starting an argz_next loop with the iterator set
- to ARGZ is safer. To preserve semantics, handle the NULL
- case by returning the start of ARGZ (if any). */
- if (argz_len > 0)
- return argz;
- else
- return 0;
- }
-}
-#endif /* !HAVE_ARGZ_NEXT */
-
-
-
-#if ! HAVE_ARGZ_STRINGIFY
-# define argz_stringify rpl_argz_stringify
-
-static void argz_stringify LT_PARAMS((char *argz, size_t argz_len,
- int sep));
-
-static void
-argz_stringify (argz, argz_len, sep)
- char *argz;
- size_t argz_len;
- int sep;
-{
- assert ((argz && argz_len) || (!argz && !argz_len));
-
- if (sep)
- {
- --argz_len; /* don't stringify the terminating EOS */
- while (--argz_len > 0)
- {
- if (argz[argz_len] == LT_EOS_CHAR)
- argz[argz_len] = sep;
- }
- }
-}
-#endif /* !HAVE_ARGZ_STRINGIFY */
-
-
-
-\f
-/* --- TYPE DEFINITIONS -- */
-
-
-/* This type is used for the array of caller data sets in each handler. */
-typedef struct {
- lt_dlcaller_id key;
- lt_ptr data;
-} lt_caller_data;
-
-
-
-\f
-/* --- OPAQUE STRUCTURES DECLARED IN LTDL.H --- */
-
-
-/* Extract the diagnostic strings from the error table macro in the same
- order as the enumerated indices in ltdl.h. */
-
-static const char *lt_dlerror_strings[] =
- {
-#define LT_ERROR(name, diagnostic) (diagnostic),
- lt_dlerror_table
-#undef LT_ERROR
-
- 0
- };
-
-/* This structure is used for the list of registered loaders. */
-struct lt_dlloader {
- struct lt_dlloader *next;
- const char *loader_name; /* identifying name for each loader */
- const char *sym_prefix; /* prefix for symbols */
- lt_module_open *module_open;
- lt_module_close *module_close;
- lt_find_sym *find_sym;
- lt_dlloader_exit *dlloader_exit;
- lt_user_data dlloader_data;
-};
-
-struct lt_dlhandle_struct {
- struct lt_dlhandle_struct *next;
- lt_dlloader *loader; /* dlopening interface */
- lt_dlinfo info;
- int depcount; /* number of dependencies */
- lt_dlhandle *deplibs; /* dependencies */
- lt_module module; /* system module handle */
- lt_ptr system; /* system specific data */
- lt_caller_data *caller_data; /* per caller associated data */
- int flags; /* various boolean stats */
-};
-
-/* Various boolean flags can be stored in the flags field of an
- lt_dlhandle_struct... */
-#define LT_DLGET_FLAG(handle, flag) (((handle)->flags & (flag)) == (flag))
-#define LT_DLSET_FLAG(handle, flag) ((handle)->flags |= (flag))
-
-#define LT_DLRESIDENT_FLAG (0x01 << 0)
-/* ...add more flags here... */
-
-#define LT_DLIS_RESIDENT(handle) LT_DLGET_FLAG(handle, LT_DLRESIDENT_FLAG)
-
-
-#define LT_DLSTRERROR(name) lt_dlerror_strings[LT_CONC(LT_ERROR_,name)]
-
-static const char objdir[] = LTDL_OBJDIR;
-static const char archive_ext[] = LTDL_ARCHIVE_EXT;
-#ifdef LTDL_SHLIB_EXT
-static const char shlib_ext[] = LTDL_SHLIB_EXT;
-#endif
-#ifdef LTDL_SYSSEARCHPATH
-static const char sys_search_path[] = LTDL_SYSSEARCHPATH;
-#endif
-
-
-
-\f
-/* --- MUTEX LOCKING --- */
-
-
-/* Macros to make it easier to run the lock functions only if they have
- been registered. The reason for the complicated lock macro is to
- ensure that the stored error message from the last error is not
- accidentally erased if the current function doesn't generate an
- error of its own. */
-#define LT_DLMUTEX_LOCK() LT_STMT_START { \
- if (lt_dlmutex_lock_func) (*lt_dlmutex_lock_func)(); \
- } LT_STMT_END
-#define LT_DLMUTEX_UNLOCK() LT_STMT_START { \
- if (lt_dlmutex_unlock_func) (*lt_dlmutex_unlock_func)();\
- } LT_STMT_END
-#define LT_DLMUTEX_SETERROR(errormsg) LT_STMT_START { \
- if (lt_dlmutex_seterror_func) \
- (*lt_dlmutex_seterror_func) (errormsg); \
- else lt_dllast_error = (errormsg); } LT_STMT_END
-#define LT_DLMUTEX_GETERROR(errormsg) LT_STMT_START { \
- if (lt_dlmutex_geterror_func) \
- (errormsg) = (*lt_dlmutex_geterror_func) (); \
- else (errormsg) = lt_dllast_error; } LT_STMT_END
-
-/* The mutex functions stored here are global, and are necessarily the
- same for all threads that wish to share access to libltdl. */
-static lt_dlmutex_lock *lt_dlmutex_lock_func = 0;
-static lt_dlmutex_unlock *lt_dlmutex_unlock_func = 0;
-static lt_dlmutex_seterror *lt_dlmutex_seterror_func = 0;
-static lt_dlmutex_geterror *lt_dlmutex_geterror_func = 0;
-static const char *lt_dllast_error = 0;
-
-
-/* Either set or reset the mutex functions. Either all the arguments must
- be valid functions, or else all can be NULL to turn off locking entirely.
- The registered functions should be manipulating a static global lock
- from the lock() and unlock() callbacks, which needs to be reentrant. */
-int
-lt_dlmutex_register (lock, unlock, seterror, geterror)
- lt_dlmutex_lock *lock;
- lt_dlmutex_unlock *unlock;
- lt_dlmutex_seterror *seterror;
- lt_dlmutex_geterror *geterror;
-{
- lt_dlmutex_unlock *old_unlock = lt_dlmutex_unlock_func;
- int errors = 0;
-
- /* Lock using the old lock() callback, if any. */
- LT_DLMUTEX_LOCK ();
-
- if ((lock && unlock && seterror && geterror)
- || !(lock || unlock || seterror || geterror))
- {
- lt_dlmutex_lock_func = lock;
- lt_dlmutex_unlock_func = unlock;
- lt_dlmutex_seterror_func = seterror;
- lt_dlmutex_geterror_func = geterror;
- }
- else
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_MUTEX_ARGS));
- ++errors;
- }
-
- /* Use the old unlock() callback we saved earlier, if any. Otherwise
- record any errors using internal storage. */
- if (old_unlock)
- (*old_unlock) ();
-
- /* Return the number of errors encountered during the execution of
- this function. */
- return errors;
-}
-
-
-
-\f
-/* --- ERROR HANDLING --- */
-
-
-static const char **user_error_strings = 0;
-static int errorcount = LT_ERROR_MAX;
-
-int
-lt_dladderror (diagnostic)
- const char *diagnostic;
-{
- int errindex = 0;
- int result = -1;
- const char **temp = (const char **) 0;
-
- assert (diagnostic);
-
- LT_DLMUTEX_LOCK ();
-
- errindex = errorcount - LT_ERROR_MAX;
- temp = LT_EREALLOC (const char *, user_error_strings, 1 + errindex);
- if (temp)
- {
- user_error_strings = temp;
- user_error_strings[errindex] = diagnostic;
- result = errorcount++;
- }
-
- LT_DLMUTEX_UNLOCK ();
-
- return result;
-}
-
-int
-lt_dlseterror (errindex)
- int errindex;
-{
- int errors = 0;
-
- LT_DLMUTEX_LOCK ();
-
- if (errindex >= errorcount || errindex < 0)
- {
- /* Ack! Error setting the error message! */
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_ERRORCODE));
- ++errors;
- }
- else if (errindex < LT_ERROR_MAX)
- {
- /* No error setting the error message! */
- LT_DLMUTEX_SETERROR (lt_dlerror_strings[errindex]);
- }
- else
- {
- /* No error setting the error message! */
- LT_DLMUTEX_SETERROR (user_error_strings[errindex - LT_ERROR_MAX]);
- }
-
- LT_DLMUTEX_UNLOCK ();
-
- return errors;
-}
-
-static lt_ptr
-lt_emalloc (size)
- size_t size;
-{
- lt_ptr mem = lt_dlmalloc (size);
- if (size && !mem)
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY));
- return mem;
-}
-
-static lt_ptr
-lt_erealloc (addr, size)
- lt_ptr addr;
- size_t size;
-{
- lt_ptr mem = lt_dlrealloc (addr, size);
- if (size && !mem)
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY));
- return mem;
-}
-
-static char *
-lt_estrdup (str)
- const char *str;
-{
- char *copy = strdup (str);
- if (LT_STRLEN (str) && !copy)
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY));
- return copy;
-}
-
-
-
-\f
-/* --- DLOPEN() INTERFACE LOADER --- */
-
-
-#if HAVE_LIBDL
-
-/* dynamic linking with dlopen/dlsym */
-
-#if HAVE_DLFCN_H
-# include <dlfcn.h>
-#endif
-
-#if HAVE_SYS_DL_H
-# include <sys/dl.h>
-#endif
-
-#ifdef RTLD_GLOBAL
-# define LT_GLOBAL RTLD_GLOBAL
-#else
-# ifdef DL_GLOBAL
-# define LT_GLOBAL DL_GLOBAL
-# endif
-#endif /* !RTLD_GLOBAL */
-#ifndef LT_GLOBAL
-# define LT_GLOBAL 0
-#endif /* !LT_GLOBAL */
-
-/* We may have to define LT_LAZY_OR_NOW in the command line if we
- find out it does not work in some platform. */
-#ifndef LT_LAZY_OR_NOW
-# ifdef RTLD_LAZY
-# define LT_LAZY_OR_NOW RTLD_LAZY
-# else
-# ifdef DL_LAZY
-# define LT_LAZY_OR_NOW DL_LAZY
-# endif
-# endif /* !RTLD_LAZY */
-#endif
-#ifndef LT_LAZY_OR_NOW
-# ifdef RTLD_NOW
-# define LT_LAZY_OR_NOW RTLD_NOW
-# else
-# ifdef DL_NOW
-# define LT_LAZY_OR_NOW DL_NOW
-# endif
-# endif /* !RTLD_NOW */
-#endif
-#ifndef LT_LAZY_OR_NOW
-# define LT_LAZY_OR_NOW 0
-#endif /* !LT_LAZY_OR_NOW */
-
-#if HAVE_DLERROR
-# define DLERROR(arg) dlerror ()
-#else
-# define DLERROR(arg) LT_DLSTRERROR (arg)
-#endif
-
-static lt_module
-sys_dl_open (loader_data, filename)
- lt_user_data loader_data;
- const char *filename;
-{
- lt_module module = dlopen (filename, LT_GLOBAL | LT_LAZY_OR_NOW);
-
- if (!module)
- {
- LT_DLMUTEX_SETERROR (DLERROR (CANNOT_OPEN));
- }
-
- return module;
-}
-
-static int
-sys_dl_close (loader_data, module)
- lt_user_data loader_data;
- lt_module module;
-{
- int errors = 0;
-
- if (dlclose (module) != 0)
- {
- LT_DLMUTEX_SETERROR (DLERROR (CANNOT_CLOSE));
- ++errors;
- }
-
- return errors;
-}
-
-static lt_ptr
-sys_dl_sym (loader_data, module, symbol)
- lt_user_data loader_data;
- lt_module module;
- const char *symbol;
-{
- lt_ptr address = dlsym (module, symbol);
-
- if (!address)
- {
- LT_DLMUTEX_SETERROR (DLERROR (SYMBOL_NOT_FOUND));
- }
-
- return address;
-}
-
-static struct lt_user_dlloader sys_dl =
- {
-# ifdef NEED_USCORE
- "_",
-# else
- 0,
-# endif
- sys_dl_open, sys_dl_close, sys_dl_sym, 0, 0 };
-
-
-#endif /* HAVE_LIBDL */
-
-
-\f
-/* --- SHL_LOAD() INTERFACE LOADER --- */
-
-#if HAVE_SHL_LOAD
-
-/* dynamic linking with shl_load (HP-UX) (comments from gmodule) */
-
-#ifdef HAVE_DL_H
-# include <dl.h>
-#endif
-
-/* some flags are missing on some systems, so we provide
- * harmless defaults.
- *
- * Mandatory:
- * BIND_IMMEDIATE - Resolve symbol references when the library is loaded.
- * BIND_DEFERRED - Delay code symbol resolution until actual reference.
- *
- * Optionally:
- * BIND_FIRST - Place the library at the head of the symbol search
- * order.
- * BIND_NONFATAL - The default BIND_IMMEDIATE behavior is to treat all
- * unsatisfied symbols as fatal. This flag allows
- * binding of unsatisfied code symbols to be deferred
- * until use.
- * [Perl: For certain libraries, like DCE, deferred
- * binding often causes run time problems. Adding
- * BIND_NONFATAL to BIND_IMMEDIATE still allows
- * unresolved references in situations like this.]
- * BIND_NOSTART - Do not call the initializer for the shared library
- * when the library is loaded, nor on a future call to
- * shl_unload().
- * BIND_VERBOSE - Print verbose messages concerning possible
- * unsatisfied symbols.
- *
- * hp9000s700/hp9000s800:
- * BIND_RESTRICTED - Restrict symbols visible by the library to those
- * present at library load time.
- * DYNAMIC_PATH - Allow the loader to dynamically search for the
- * library specified by the path argument.
- */
-
-#ifndef DYNAMIC_PATH
-# define DYNAMIC_PATH 0
-#endif
-#ifndef BIND_RESTRICTED
-# define BIND_RESTRICTED 0
-#endif
-
-#define LT_BIND_FLAGS (BIND_IMMEDIATE | BIND_NONFATAL | DYNAMIC_PATH)
-
-static lt_module
-sys_shl_open (loader_data, filename)
- lt_user_data loader_data;
- const char *filename;
-{
- static shl_t self = (shl_t) 0;
- lt_module module = shl_load (filename, LT_BIND_FLAGS, 0L);
-
- /* Since searching for a symbol against a NULL module handle will also
- look in everything else that was already loaded and exported with
- the -E compiler flag, we always cache a handle saved before any
- modules are loaded. */
- if (!self)
- {
- lt_ptr address;
- shl_findsym (&self, "main", TYPE_UNDEFINED, &address);
- }
-
- if (!filename)
- {
- module = self;
- }
- else
- {
- module = shl_load (filename, LT_BIND_FLAGS, 0L);
-
- if (!module)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN));
- }
- }
-
- return module;
-}
-
-static int
-sys_shl_close (loader_data, module)
- lt_user_data loader_data;
- lt_module module;
-{
- int errors = 0;
-
- if (module && (shl_unload ((shl_t) (module)) != 0))
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE));
- ++errors;
- }
-
- return errors;
-}
-
-static lt_ptr
-sys_shl_sym (loader_data, module, symbol)
- lt_user_data loader_data;
- lt_module module;
- const char *symbol;
-{
- lt_ptr address = 0;
-
- /* sys_shl_open should never return a NULL module handle */
- if (module == (lt_module) 0)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE));
- }
- else if (!shl_findsym((shl_t*) &module, symbol, TYPE_UNDEFINED, &address))
- {
- if (!address)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND));
- }
- }
-
- return address;
-}
-
-static struct lt_user_dlloader sys_shl = {
- 0, sys_shl_open, sys_shl_close, sys_shl_sym, 0, 0
-};
-
-#endif /* HAVE_SHL_LOAD */
-
-
-
-\f
-/* --- LOADLIBRARY() INTERFACE LOADER --- */
-
-#ifdef __WINDOWS__
-
-/* dynamic linking for Win32 */
-
-#include <windows.h>
-
-/* Forward declaration; required to implement handle search below. */
-static lt_dlhandle handles;
-
-static lt_module
-sys_wll_open (loader_data, filename)
- lt_user_data loader_data;
- const char *filename;
-{
- lt_dlhandle cur;
- lt_module module = 0;
- const char *errormsg = 0;
- char *searchname = 0;
- char *ext;
- char self_name_buf[MAX_PATH];
-
- if (!filename)
- {
- /* Get the name of main module */
- *self_name_buf = 0;
- GetModuleFileName (NULL, self_name_buf, sizeof (self_name_buf));
- filename = ext = self_name_buf;
- }
- else
- {
- ext = strrchr (filename, '.');
- }
-
- if (ext)
- {
- /* FILENAME already has an extension. */
- searchname = lt_estrdup (filename);
- }
- else
- {
- /* Append a `.' to stop Windows from adding an
- implicit `.dll' extension. */
- searchname = LT_EMALLOC (char, 2+ LT_STRLEN (filename));
- if (searchname)
- sprintf (searchname, "%s.", filename);
- }
- if (!searchname)
- return 0;
-
- {
- /* Silence dialog from LoadLibrary on some failures.
- No way to get the error mode, but to set it,
- so set it twice to preserve any previous flags. */
- UINT errormode = SetErrorMode(SEM_FAILCRITICALERRORS);
- SetErrorMode(errormode | SEM_FAILCRITICALERRORS);
-
-#if defined(__CYGWIN__)
- {
- char wpath[MAX_PATH];
- cygwin_conv_to_full_win32_path (searchname, wpath);
- module = LoadLibrary (wpath);
- }
-#else
- module = LoadLibrary (searchname);
-#endif
-
- /* Restore the error mode. */
- SetErrorMode(errormode);
- }
-
- LT_DLFREE (searchname);
-
- /* libltdl expects this function to fail if it is unable
- to physically load the library. Sadly, LoadLibrary
- will search the loaded libraries for a match and return
- one of them if the path search load fails.
-
- We check whether LoadLibrary is returning a handle to
- an already loaded module, and simulate failure if we
- find one. */
- LT_DLMUTEX_LOCK ();
- cur = handles;
- while (cur)
- {
- if (!cur->module)
- {
- cur = 0;
- break;
- }
-
- if (cur->module == module)
- {
- break;
- }
-
- cur = cur->next;
- }
- LT_DLMUTEX_UNLOCK ();
-
- if (cur || !module)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN));
- module = 0;
- }
-
- return module;
-}
-
-static int
-sys_wll_close (loader_data, module)
- lt_user_data loader_data;
- lt_module module;
-{
- int errors = 0;
-
- if (FreeLibrary(module) == 0)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE));
- ++errors;
- }
-
- return errors;
-}
-
-static lt_ptr
-sys_wll_sym (loader_data, module, symbol)
- lt_user_data loader_data;
- lt_module module;
- const char *symbol;
-{
- lt_ptr address = GetProcAddress (module, symbol);
-
- if (!address)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND));
- }
-
- return address;
-}
-
-static struct lt_user_dlloader sys_wll = {
- 0, sys_wll_open, sys_wll_close, sys_wll_sym, 0, 0
-};
-
-#endif /* __WINDOWS__ */
-
-
-
-\f
-/* --- LOAD_ADD_ON() INTERFACE LOADER --- */
-
-
-#ifdef __BEOS__
-
-/* dynamic linking for BeOS */
-
-#include <kernel/image.h>
-
-static lt_module
-sys_bedl_open (loader_data, filename)
- lt_user_data loader_data;
- const char *filename;
-{
- image_id image = 0;
-
- if (filename)
- {
- image = load_add_on (filename);
- }
- else
- {
- image_info info;
- int32 cookie = 0;
- if (get_next_image_info (0, &cookie, &info) == B_OK)
- image = load_add_on (info.name);
- }
-
- if (image <= 0)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN));
- image = 0;
- }
-
- return (lt_module) image;
-}
-
-static int
-sys_bedl_close (loader_data, module)
- lt_user_data loader_data;
- lt_module module;
-{
- int errors = 0;
-
- if (unload_add_on ((image_id) module) != B_OK)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE));
- ++errors;
- }
-
- return errors;
-}
-
-static lt_ptr
-sys_bedl_sym (loader_data, module, symbol)
- lt_user_data loader_data;
- lt_module module;
- const char *symbol;
-{
- lt_ptr address = 0;
- image_id image = (image_id) module;
-
- if (get_image_symbol (image, symbol, B_SYMBOL_TYPE_ANY, address) != B_OK)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND));
- address = 0;
- }
-
- return address;
-}
-
-static struct lt_user_dlloader sys_bedl = {
- 0, sys_bedl_open, sys_bedl_close, sys_bedl_sym, 0, 0
-};
-
-#endif /* __BEOS__ */
-
-
-
-\f
-/* --- DLD_LINK() INTERFACE LOADER --- */
-
-
-#if HAVE_DLD
-
-/* dynamic linking with dld */
-
-#if HAVE_DLD_H
-#include <dld.h>
-#endif
-
-static lt_module
-sys_dld_open (loader_data, filename)
- lt_user_data loader_data;
- const char *filename;
-{
- lt_module module = strdup (filename);
-
- if (dld_link (filename) != 0)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN));
- LT_DLFREE (module);
- module = 0;
- }
-
- return module;
-}
-
-static int
-sys_dld_close (loader_data, module)
- lt_user_data loader_data;
- lt_module module;
-{
- int errors = 0;
-
- if (dld_unlink_by_file ((char*)(module), 1) != 0)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE));
- ++errors;
- }
- else
- {
- LT_DLFREE (module);
- }
-
- return errors;
-}
-
-static lt_ptr
-sys_dld_sym (loader_data, module, symbol)
- lt_user_data loader_data;
- lt_module module;
- const char *symbol;
-{
- lt_ptr address = dld_get_func (symbol);
-
- if (!address)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND));
- }
-
- return address;
-}
-
-static struct lt_user_dlloader sys_dld = {
- 0, sys_dld_open, sys_dld_close, sys_dld_sym, 0, 0
-};
-
-#endif /* HAVE_DLD */
-
-/* --- DYLD() MACOSX/DARWIN INTERFACE LOADER --- */
-#if HAVE_DYLD
-
-
-#if HAVE_MACH_O_DYLD_H
-#if !defined(__APPLE_CC__) && !defined(__MWERKS__) && !defined(__private_extern__)
-/* Is this correct? Does it still function properly? */
-#define __private_extern__ extern
-#endif
-# include <mach-o/dyld.h>
-#endif
-#include <mach-o/getsect.h>
-
-/* We have to put some stuff here that isn't in older dyld.h files */
-#ifndef ENUM_DYLD_BOOL
-# define ENUM_DYLD_BOOL
-# undef FALSE
-# undef TRUE
- enum DYLD_BOOL {
- FALSE,
- TRUE
- };
-#endif
-#ifndef LC_REQ_DYLD
-# define LC_REQ_DYLD 0x80000000
-#endif
-#ifndef LC_LOAD_WEAK_DYLIB
-# define LC_LOAD_WEAK_DYLIB (0x18 | LC_REQ_DYLD)
-#endif
-static const struct mach_header * (*ltdl_NSAddImage)(const char *image_name, unsigned long options) = 0;
-static NSSymbol (*ltdl_NSLookupSymbolInImage)(const struct mach_header *image,const char *symbolName, unsigned long options) = 0;
-static enum DYLD_BOOL (*ltdl_NSIsSymbolNameDefinedInImage)(const struct mach_header *image, const char *symbolName) = 0;
-static enum DYLD_BOOL (*ltdl_NSMakePrivateModulePublic)(NSModule module) = 0;
-
-#ifndef NSADDIMAGE_OPTION_NONE
-#define NSADDIMAGE_OPTION_NONE 0x0
-#endif
-#ifndef NSADDIMAGE_OPTION_RETURN_ON_ERROR
-#define NSADDIMAGE_OPTION_RETURN_ON_ERROR 0x1
-#endif
-#ifndef NSADDIMAGE_OPTION_WITH_SEARCHING
-#define NSADDIMAGE_OPTION_WITH_SEARCHING 0x2
-#endif
-#ifndef NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED
-#define NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED 0x4
-#endif
-#ifndef NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME
-#define NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME 0x8
-#endif
-#ifndef NSLOOKUPSYMBOLINIMAGE_OPTION_BIND
-#define NSLOOKUPSYMBOLINIMAGE_OPTION_BIND 0x0
-#endif
-#ifndef NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW
-#define NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW 0x1
-#endif
-#ifndef NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_FULLY
-#define NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_FULLY 0x2
-#endif
-#ifndef NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR
-#define NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR 0x4
-#endif
-
-
-static const char *
-lt_int_dyld_error(othererror)
- char* othererror;
-{
-/* return the dyld error string, or the passed in error string if none */
- NSLinkEditErrors ler;
- int lerno;
- const char *errstr;
- const char *file;
- NSLinkEditError(&ler,&lerno,&file,&errstr);
- if (!errstr || !strlen(errstr)) errstr = othererror;
- return errstr;
-}
-
-static const struct mach_header *
-lt_int_dyld_get_mach_header_from_nsmodule(module)
- NSModule module;
-{
-/* There should probably be an apple dyld api for this */
- int i=_dyld_image_count();
- int j;
- const char *modname=NSNameOfModule(module);
- const struct mach_header *mh=NULL;
- if (!modname) return NULL;
- for (j = 0; j < i; j++)
- {
- if (!strcmp(_dyld_get_image_name(j),modname))
- {
- mh=_dyld_get_image_header(j);
- break;
- }
- }
- return mh;
-}
-
-static const char* lt_int_dyld_lib_install_name(mh)
- const struct mach_header *mh;
-{
-/* NSAddImage is also used to get the loaded image, but it only works if the lib
- is installed, for uninstalled libs we need to check the install_names against
- each other. Note that this is still broken if DYLD_IMAGE_SUFFIX is set and a
- different lib was loaded as a result
-*/
- int j;
- struct load_command *lc;
- unsigned long offset = sizeof(struct mach_header);
- const char* retStr=NULL;
- for (j = 0; j < mh->ncmds; j++)
- {
- lc = (struct load_command*)(((unsigned long)mh) + offset);
- if (LC_ID_DYLIB == lc->cmd)
- {
- retStr=(char*)(((struct dylib_command*)lc)->dylib.name.offset +
- (unsigned long)lc);
- }
- offset += lc->cmdsize;
- }
- return retStr;
-}
-
-static const struct mach_header *
-lt_int_dyld_match_loaded_lib_by_install_name(const char *name)
-{
- int i=_dyld_image_count();
- int j;
- const struct mach_header *mh=NULL;
- const char *id=NULL;
- for (j = 0; j < i; j++)
- {
- id=lt_int_dyld_lib_install_name(_dyld_get_image_header(j));
- if ((id) && (!strcmp(id,name)))
- {
- mh=_dyld_get_image_header(j);
- break;
- }
- }
- return mh;
-}
-
-static NSSymbol
-lt_int_dyld_NSlookupSymbolInLinkedLibs(symbol,mh)
- const char *symbol;
- const struct mach_header *mh;
-{
- /* Safe to assume our mh is good */
- int j;
- struct load_command *lc;
- unsigned long offset = sizeof(struct mach_header);
- NSSymbol retSym = 0;
- const struct mach_header *mh1;
- if ((ltdl_NSLookupSymbolInImage) && NSIsSymbolNameDefined(symbol) )
- {
- for (j = 0; j < mh->ncmds; j++)
- {
- lc = (struct load_command*)(((unsigned long)mh) + offset);
- if ((LC_LOAD_DYLIB == lc->cmd) || (LC_LOAD_WEAK_DYLIB == lc->cmd))
- {
- mh1=lt_int_dyld_match_loaded_lib_by_install_name((char*)(((struct dylib_command*)lc)->dylib.name.offset +
- (unsigned long)lc));
- if (!mh1)
- {
- /* Maybe NSAddImage can find it */
- mh1=ltdl_NSAddImage((char*)(((struct dylib_command*)lc)->dylib.name.offset +
- (unsigned long)lc),
- NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED +
- NSADDIMAGE_OPTION_WITH_SEARCHING +
- NSADDIMAGE_OPTION_RETURN_ON_ERROR );
- }
- if (mh1)
- {
- retSym = ltdl_NSLookupSymbolInImage(mh1,
- symbol,
- NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW
- | NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR
- );
- if (retSym) break;
- }
- }
- offset += lc->cmdsize;
- }
- }
- return retSym;
-}
-
-static int
-sys_dyld_init()
-{
- int retCode = 0;
- int err = 0;
- if (!_dyld_present()) {
- retCode=1;
- }
- else {
- err = _dyld_func_lookup("__dyld_NSAddImage",(unsigned long*)<dl_NSAddImage);
- err = _dyld_func_lookup("__dyld_NSLookupSymbolInImage",(unsigned long*)<dl_NSLookupSymbolInImage);
- err = _dyld_func_lookup("__dyld_NSIsSymbolNameDefinedInImage",(unsigned long*)<dl_NSIsSymbolNameDefinedInImage);
- err = _dyld_func_lookup("__dyld_NSMakePrivateModulePublic",(unsigned long*)<dl_NSMakePrivateModulePublic);
- }
- return retCode;
-}
-
-static lt_module
-sys_dyld_open (loader_data, filename)
- lt_user_data loader_data;
- const char *filename;
-{
- lt_module module = 0;
- NSObjectFileImage ofi = 0;
- NSObjectFileImageReturnCode ofirc;
-
- if (!filename)
- return (lt_module)-1;
- ofirc = NSCreateObjectFileImageFromFile(filename, &ofi);
- switch (ofirc)
- {
- case NSObjectFileImageSuccess:
- module = NSLinkModule(ofi, filename,
- NSLINKMODULE_OPTION_RETURN_ON_ERROR
- | NSLINKMODULE_OPTION_PRIVATE
- | NSLINKMODULE_OPTION_BINDNOW);
- NSDestroyObjectFileImage(ofi);
- if (module)
- ltdl_NSMakePrivateModulePublic(module);
- break;
- case NSObjectFileImageInappropriateFile:
- if (ltdl_NSIsSymbolNameDefinedInImage && ltdl_NSLookupSymbolInImage)
- {
- module = (lt_module)ltdl_NSAddImage(filename, NSADDIMAGE_OPTION_RETURN_ON_ERROR);
- break;
- }
- default:
- LT_DLMUTEX_SETERROR (lt_int_dyld_error(LT_DLSTRERROR(CANNOT_OPEN)));
- return 0;
- }
- if (!module) LT_DLMUTEX_SETERROR (lt_int_dyld_error(LT_DLSTRERROR(CANNOT_OPEN)));
- return module;
-}
-
-static int
-sys_dyld_close (loader_data, module)
- lt_user_data loader_data;
- lt_module module;
-{
- int retCode = 0;
- int flags = 0;
- if (module == (lt_module)-1) return 0;
-#ifdef __BIG_ENDIAN__
- if (((struct mach_header *)module)->magic == MH_MAGIC)
-#else
- if (((struct mach_header *)module)->magic == MH_CIGAM)
-#endif
- {
- LT_DLMUTEX_SETERROR("Can not close a dylib");
- retCode = 1;
- }
- else
- {
-#if 1
-/* Currently, if a module contains c++ static destructors and it is unloaded, we
- get a segfault in atexit(), due to compiler and dynamic loader differences of
- opinion, this works around that.
-*/
- if ((const struct section *)NULL !=
- getsectbynamefromheader(lt_int_dyld_get_mach_header_from_nsmodule(module),
- "__DATA","__mod_term_func"))
- {
- flags += NSUNLINKMODULE_OPTION_KEEP_MEMORY_MAPPED;
- }
-#endif
-#ifdef __ppc__
- flags += NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES;
-#endif
- if (!NSUnLinkModule(module,flags))
- {
- retCode=1;
- LT_DLMUTEX_SETERROR (lt_int_dyld_error(LT_DLSTRERROR(CANNOT_CLOSE)));
- }
- }
-
- return retCode;
-}
-
-static lt_ptr
-sys_dyld_sym (loader_data, module, symbol)
- lt_user_data loader_data;
- lt_module module;
- const char *symbol;
-{
- lt_ptr address = 0;
- NSSymbol *nssym = 0;
- void *unused;
- const struct mach_header *mh=NULL;
- char saveError[256] = "Symbol not found";
- if (module == (lt_module)-1)
- {
- _dyld_lookup_and_bind(symbol,(unsigned long*)&address,&unused);
- return address;
- }
-#ifdef __BIG_ENDIAN__
- if (((struct mach_header *)module)->magic == MH_MAGIC)
-#else
- if (((struct mach_header *)module)->magic == MH_CIGAM)
-#endif
- {
- if (ltdl_NSIsSymbolNameDefinedInImage && ltdl_NSLookupSymbolInImage)
- {
- mh=module;
- if (ltdl_NSIsSymbolNameDefinedInImage((struct mach_header*)module,symbol))
- {
- nssym = ltdl_NSLookupSymbolInImage((struct mach_header*)module,
- symbol,
- NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW
- | NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR
- );
- }
- }
-
- }
- else {
- nssym = NSLookupSymbolInModule(module, symbol);
- }
- if (!nssym)
- {
- strncpy(saveError, lt_int_dyld_error(LT_DLSTRERROR(SYMBOL_NOT_FOUND)), 255);
- saveError[255] = 0;
- if (!mh) mh=lt_int_dyld_get_mach_header_from_nsmodule(module);
- nssym = lt_int_dyld_NSlookupSymbolInLinkedLibs(symbol,mh);
- }
- if (!nssym)
- {
- LT_DLMUTEX_SETERROR (saveError);
- return NULL;
- }
- return NSAddressOfSymbol(nssym);
-}
-
-static struct lt_user_dlloader sys_dyld =
- { "_", sys_dyld_open, sys_dyld_close, sys_dyld_sym, 0, 0 };
-
-
-#endif /* HAVE_DYLD */
-
-\f
-/* --- DLPREOPEN() INTERFACE LOADER --- */
-
-
-/* emulate dynamic linking using preloaded_symbols */
-
-typedef struct lt_dlsymlists_t
-{
- struct lt_dlsymlists_t *next;
- const lt_dlsymlist *syms;
-} lt_dlsymlists_t;
-
-static const lt_dlsymlist *default_preloaded_symbols = 0;
-static lt_dlsymlists_t *preloaded_symbols = 0;
-
-static int
-presym_init (loader_data)
- lt_user_data loader_data;
-{
- int errors = 0;
-
- LT_DLMUTEX_LOCK ();
-
- preloaded_symbols = 0;
- if (default_preloaded_symbols)
- {
- errors = lt_dlpreload (default_preloaded_symbols);
- }
-
- LT_DLMUTEX_UNLOCK ();
-
- return errors;
-}
-
-static int
-presym_free_symlists ()
-{
- lt_dlsymlists_t *lists;
-
- LT_DLMUTEX_LOCK ();
-
- lists = preloaded_symbols;
- while (lists)
- {
- lt_dlsymlists_t *tmp = lists;
-
- lists = lists->next;
- LT_DLFREE (tmp);
- }
- preloaded_symbols = 0;
-
- LT_DLMUTEX_UNLOCK ();
-
- return 0;
-}
-
-static int
-presym_exit (loader_data)
- lt_user_data loader_data;
-{
- presym_free_symlists ();
- return 0;
-}
-
-static int
-presym_add_symlist (preloaded)
- const lt_dlsymlist *preloaded;
-{
- lt_dlsymlists_t *tmp;
- lt_dlsymlists_t *lists;
- int errors = 0;
-
- LT_DLMUTEX_LOCK ();
-
- lists = preloaded_symbols;
- while (lists)
- {
- if (lists->syms == preloaded)
- {
- goto done;
- }
- lists = lists->next;
- }
-
- tmp = LT_EMALLOC (lt_dlsymlists_t, 1);
- if (tmp)
- {
- memset (tmp, 0, sizeof(lt_dlsymlists_t));
- tmp->syms = preloaded;
- tmp->next = preloaded_symbols;
- preloaded_symbols = tmp;
- }
- else
- {
- ++errors;
- }
-
- done:
- LT_DLMUTEX_UNLOCK ();
- return errors;
-}
-
-static lt_module
-presym_open (loader_data, filename)
- lt_user_data loader_data;
- const char *filename;
-{
- lt_dlsymlists_t *lists;
- lt_module module = (lt_module) 0;
-
- LT_DLMUTEX_LOCK ();
- lists = preloaded_symbols;
-
- if (!lists)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_SYMBOLS));
- goto done;
- }
-
- /* Can't use NULL as the reflective symbol header, as NULL is
- used to mark the end of the entire symbol list. Self-dlpreopened
- symbols follow this magic number, chosen to be an unlikely
- clash with a real module name. */
- if (!filename)
- {
- filename = "@PROGRAM@";
- }
-
- while (lists)
- {
- const lt_dlsymlist *syms = lists->syms;
-
- while (syms->name)
- {
- if (!syms->address && strcmp(syms->name, filename) == 0)
- {
- module = (lt_module) syms;
- goto done;
- }
- ++syms;
- }
-
- lists = lists->next;
- }
-
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND));
-
- done:
- LT_DLMUTEX_UNLOCK ();
- return module;
-}
-
-static int
-presym_close (loader_data, module)
- lt_user_data loader_data;
- lt_module module;
-{
- /* Just to silence gcc -Wall */
- module = 0;
- return 0;
-}
-
-static lt_ptr
-presym_sym (loader_data, module, symbol)
- lt_user_data loader_data;
- lt_module module;
- const char *symbol;
-{
- lt_dlsymlist *syms = (lt_dlsymlist*) module;
-
- ++syms;
- while (syms->address)
- {
- if (strcmp(syms->name, symbol) == 0)
- {
- return syms->address;
- }
-
- ++syms;
- }
-
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND));
-
- return 0;
-}
-
-static struct lt_user_dlloader presym = {
- 0, presym_open, presym_close, presym_sym, presym_exit, 0
-};
-
-
-
-
-\f
-/* --- DYNAMIC MODULE LOADING --- */
-
-
-/* The type of a function used at each iteration of foreach_dirinpath(). */
-typedef int foreach_callback_func LT_PARAMS((char *filename, lt_ptr data1,
- lt_ptr data2));
-
-static int foreach_dirinpath LT_PARAMS((const char *search_path,
- const char *base_name,
- foreach_callback_func *func,
- lt_ptr data1, lt_ptr data2));
-
-static int find_file_callback LT_PARAMS((char *filename, lt_ptr data,
- lt_ptr ignored));
-static int find_handle_callback LT_PARAMS((char *filename, lt_ptr data,
- lt_ptr ignored));
-static int foreachfile_callback LT_PARAMS((char *filename, lt_ptr data1,
- lt_ptr data2));
-
-
-static int canonicalize_path LT_PARAMS((const char *path,
- char **pcanonical));
-static int argzize_path LT_PARAMS((const char *path,
- char **pargz,
- size_t *pargz_len));
-static FILE *find_file LT_PARAMS((const char *search_path,
- const char *base_name,
- char **pdir));
-static lt_dlhandle *find_handle LT_PARAMS((const char *search_path,
- const char *base_name,
- lt_dlhandle *handle));
-static int find_module LT_PARAMS((lt_dlhandle *handle,
- const char *dir,
- const char *libdir,
- const char *dlname,
- const char *old_name,
- int installed));
-static int free_vars LT_PARAMS((char *dlname, char *oldname,
- char *libdir, char *deplibs));
-static int load_deplibs LT_PARAMS((lt_dlhandle handle,
- char *deplibs));
-static int trim LT_PARAMS((char **dest,
- const char *str));
-static int try_dlopen LT_PARAMS((lt_dlhandle *handle,
- const char *filename));
-static int tryall_dlopen LT_PARAMS((lt_dlhandle *handle,
- const char *filename));
-static int unload_deplibs LT_PARAMS((lt_dlhandle handle));
-static int lt_argz_insert LT_PARAMS((char **pargz,
- size_t *pargz_len,
- char *before,
- const char *entry));
-static int lt_argz_insertinorder LT_PARAMS((char **pargz,
- size_t *pargz_len,
- const char *entry));
-static int lt_argz_insertdir LT_PARAMS((char **pargz,
- size_t *pargz_len,
- const char *dirnam,
- struct dirent *dp));
-static int lt_dlpath_insertdir LT_PARAMS((char **ppath,
- char *before,
- const char *dir));
-static int list_files_by_dir LT_PARAMS((const char *dirnam,
- char **pargz,
- size_t *pargz_len));
-static int file_not_found LT_PARAMS((void));
-
-static char *user_search_path= 0;
-static lt_dlloader *loaders = 0;
-static lt_dlhandle handles = 0;
-static int initialized = 0;
-
-/* Initialize libltdl. */
-int
-lt_dlinit ()
-{
- int errors = 0;
-
- LT_DLMUTEX_LOCK ();
-
- /* Initialize only at first call. */
- if (++initialized == 1)
- {
- handles = 0;
- user_search_path = 0; /* empty search path */
-
-#if HAVE_LIBDL
- errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dl, "dlopen");
-#endif
-#if HAVE_SHL_LOAD
- errors += lt_dlloader_add (lt_dlloader_next (0), &sys_shl, "dlopen");
-#endif
-#ifdef __WINDOWS__
- errors += lt_dlloader_add (lt_dlloader_next (0), &sys_wll, "dlopen");
-#endif
-#ifdef __BEOS__
- errors += lt_dlloader_add (lt_dlloader_next (0), &sys_bedl, "dlopen");
-#endif
-#if HAVE_DLD
- errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dld, "dld");
-#endif
-#if HAVE_DYLD
- errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dyld, "dyld");
- errors += sys_dyld_init();
-#endif
- errors += lt_dlloader_add (lt_dlloader_next (0), &presym, "dlpreload");
-
- if (presym_init (presym.dlloader_data))
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INIT_LOADER));
- ++errors;
- }
- else if (errors != 0)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (DLOPEN_NOT_SUPPORTED));
- ++errors;
- }
- }
-
- LT_DLMUTEX_UNLOCK ();
-
- return errors;
-}
-
-int
-lt_dlpreload (preloaded)
- const lt_dlsymlist *preloaded;
-{
- int errors = 0;
-
- if (preloaded)
- {
- errors = presym_add_symlist (preloaded);
- }
- else
- {
- presym_free_symlists();
-
- LT_DLMUTEX_LOCK ();
- if (default_preloaded_symbols)
- {
- errors = lt_dlpreload (default_preloaded_symbols);
- }
- LT_DLMUTEX_UNLOCK ();
- }
-
- return errors;
-}
-
-int
-lt_dlpreload_default (preloaded)
- const lt_dlsymlist *preloaded;
-{
- LT_DLMUTEX_LOCK ();
- default_preloaded_symbols = preloaded;
- LT_DLMUTEX_UNLOCK ();
- return 0;
-}
-
-int
-lt_dlexit ()
-{
- /* shut down libltdl */
- lt_dlloader *loader;
- int errors = 0;
-
- LT_DLMUTEX_LOCK ();
- loader = loaders;
-
- if (!initialized)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SHUTDOWN));
- ++errors;
- goto done;
- }
-
- /* shut down only at last call. */
- if (--initialized == 0)
- {
- int level;
-
- while (handles && LT_DLIS_RESIDENT (handles))
- {
- handles = handles->next;
- }
-
- /* close all modules */
- for (level = 1; handles; ++level)
- {
- lt_dlhandle cur = handles;
- int saw_nonresident = 0;
-
- while (cur)
- {
- lt_dlhandle tmp = cur;
- cur = cur->next;
- if (!LT_DLIS_RESIDENT (tmp))
- saw_nonresident = 1;
- if (!LT_DLIS_RESIDENT (tmp) && tmp->info.ref_count <= level)
- {
- if (lt_dlclose (tmp))
- {
- ++errors;
- }
- /* Make sure that the handle pointed to by 'cur' still exists.
- lt_dlclose recursively closes dependent libraries which removes
- them from the linked list. One of these might be the one
- pointed to by 'cur'. */
- if (cur)
- {
- for (tmp = handles; tmp; tmp = tmp->next)
- if (tmp == cur)
- break;
- if (! tmp)
- cur = handles;
- }
- }
- }
- /* done if only resident modules are left */
- if (!saw_nonresident)
- break;
- }
-
- /* close all loaders */
- while (loader)
- {
- lt_dlloader *next = loader->next;
- lt_user_data data = loader->dlloader_data;
- if (loader->dlloader_exit && loader->dlloader_exit (data))
- {
- ++errors;
- }
-
- LT_DLMEM_REASSIGN (loader, next);
- }
- loaders = 0;
- }
-
- done:
- LT_DLMUTEX_UNLOCK ();
- return errors;
-}
-
-static int
-tryall_dlopen (handle, filename)
- lt_dlhandle *handle;
- const char *filename;
-{
- lt_dlhandle cur;
- lt_dlloader *loader;
- const char *saved_error;
- int errors = 0;
-
- LT_DLMUTEX_GETERROR (saved_error);
- LT_DLMUTEX_LOCK ();
-
- cur = handles;
- loader = loaders;
-
- /* check whether the module was already opened */
- while (cur)
- {
- /* try to dlopen the program itself? */
- if (!cur->info.filename && !filename)
- {
- break;
- }
-
- if (cur->info.filename && filename
- && strcmp (cur->info.filename, filename) == 0)
- {
- break;
- }
-
- cur = cur->next;
- }
-
- if (cur)
- {
- ++cur->info.ref_count;
- *handle = cur;
- goto done;
- }
-
- cur = *handle;
- if (filename)
- {
- /* Comment out the check of file permissions using access.
- This call seems to always return -1 with error EACCES.
- */
- /* We need to catch missing file errors early so that
- file_not_found() can detect what happened.
- if (access (filename, R_OK) != 0)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND));
- ++errors;
- goto done;
- } */
-
- cur->info.filename = lt_estrdup (filename);
- if (!cur->info.filename)
- {
- ++errors;
- goto done;
- }
- }
- else
- {
- cur->info.filename = 0;
- }
-
- while (loader)
- {
- lt_user_data data = loader->dlloader_data;
-
- cur->module = loader->module_open (data, filename);
-
- if (cur->module != 0)
- {
- break;
- }
- loader = loader->next;
- }
-
- if (!loader)
- {
- LT_DLFREE (cur->info.filename);
- ++errors;
- goto done;
- }
-
- cur->loader = loader;
- LT_DLMUTEX_SETERROR (saved_error);
-
- done:
- LT_DLMUTEX_UNLOCK ();
-
- return errors;
-}
-
-static int
-tryall_dlopen_module (handle, prefix, dirname, dlname)
- lt_dlhandle *handle;
- const char *prefix;
- const char *dirname;
- const char *dlname;
-{
- int error = 0;
- char *filename = 0;
- size_t filename_len = 0;
- size_t dirname_len = LT_STRLEN (dirname);
-
- assert (handle);
- assert (dirname);
- assert (dlname);
-#ifdef LT_DIRSEP_CHAR
- /* Only canonicalized names (i.e. with DIRSEP chars already converted)
- should make it into this function: */
- assert (strchr (dirname, LT_DIRSEP_CHAR) == 0);
-#endif
-
- if (dirname_len > 0)
- if (dirname[dirname_len -1] == '/')
- --dirname_len;
- filename_len = dirname_len + 1 + LT_STRLEN (dlname);
-
- /* Allocate memory, and combine DIRNAME and MODULENAME into it.
- The PREFIX (if any) is handled below. */
- filename = LT_EMALLOC (char, dirname_len + 1 + filename_len + 1);
- if (!filename)
- return 1;
-
- sprintf (filename, "%.*s/%s", (int) dirname_len, dirname, dlname);
-
- /* Now that we have combined DIRNAME and MODULENAME, if there is
- also a PREFIX to contend with, simply recurse with the arguments
- shuffled. Otherwise, attempt to open FILENAME as a module. */
- if (prefix)
- {
- error += tryall_dlopen_module (handle,
- (const char *) 0, prefix, filename);
- }
- else if (tryall_dlopen (handle, filename) != 0)
- {
- ++error;
- }
-
- LT_DLFREE (filename);
- return error;
-}
-
-static int
-find_module (handle, dir, libdir, dlname, old_name, installed)
- lt_dlhandle *handle;
- const char *dir;
- const char *libdir;
- const char *dlname;
- const char *old_name;
- int installed;
-{
- /* Try to open the old library first; if it was dlpreopened,
- we want the preopened version of it, even if a dlopenable
- module is available. */
- if (old_name && tryall_dlopen (handle, old_name) == 0)
- {
- return 0;
- }
-
- /* Try to open the dynamic library. */
- if (dlname)
- {
- /* try to open the installed module */
- if (installed && libdir)
- {
- if (tryall_dlopen_module (handle,
- (const char *) 0, libdir, dlname) == 0)
- return 0;
- }
-
- /* try to open the not-installed module */
- if (!installed)
- {
- if (tryall_dlopen_module (handle, dir, objdir, dlname) == 0)
- return 0;
- }
-
- /* maybe it was moved to another directory */
- {
- if (dir && (tryall_dlopen_module (handle,
- (const char *) 0, dir, dlname) == 0))
- return 0;
- }
- }
-
- return 1;
-}
-
-
-static int
-canonicalize_path (path, pcanonical)
- const char *path;
- char **pcanonical;
-{
- char *canonical = 0;
-
- assert (path && *path);
- assert (pcanonical);
-
- canonical = LT_EMALLOC (char, 1+ LT_STRLEN (path));
- if (!canonical)
- return 1;
-
- {
- size_t dest = 0;
- size_t src;
- for (src = 0; path[src] != LT_EOS_CHAR; ++src)
- {
- /* Path separators are not copied to the beginning or end of
- the destination, or if another separator would follow
- immediately. */
- if (path[src] == LT_PATHSEP_CHAR)
- {
- if ((dest == 0)
- || (path[1+ src] == LT_PATHSEP_CHAR)
- || (path[1+ src] == LT_EOS_CHAR))
- continue;
- }
-
- /* Anything other than a directory separator is copied verbatim. */
- if ((path[src] != '/')
-#ifdef LT_DIRSEP_CHAR
- && (path[src] != LT_DIRSEP_CHAR)
-#endif
- )
- {
- canonical[dest++] = path[src];
- }
- /* Directory separators are converted and copied only if they are
- not at the end of a path -- i.e. before a path separator or
- NULL terminator. */
- else if ((path[1+ src] != LT_PATHSEP_CHAR)
- && (path[1+ src] != LT_EOS_CHAR)
-#ifdef LT_DIRSEP_CHAR
- && (path[1+ src] != LT_DIRSEP_CHAR)
-#endif
- && (path[1+ src] != '/'))
- {
- canonical[dest++] = '/';
- }
- }
-
- /* Add an end-of-string marker at the end. */
- canonical[dest] = LT_EOS_CHAR;
- }
-
- /* Assign new value. */
- *pcanonical = canonical;
-
- return 0;
-}
-
-static int
-argzize_path (path, pargz, pargz_len)
- const char *path;
- char **pargz;
- size_t *pargz_len;
-{
- error_t error;
-
- assert (path);
- assert (pargz);
- assert (pargz_len);
-
- if ((error = argz_create_sep (path, LT_PATHSEP_CHAR, pargz, pargz_len)))
- {
- switch (error)
- {
- case ENOMEM:
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY));
- break;
- default:
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (UNKNOWN));
- break;
- }
-
- return 1;
- }
-
- return 0;
-}
-
-/* Repeatedly call FUNC with each LT_PATHSEP_CHAR delimited element
- of SEARCH_PATH and references to DATA1 and DATA2, until FUNC returns
- non-zero or all elements are exhausted. If BASE_NAME is non-NULL,
- it is appended to each SEARCH_PATH element before FUNC is called. */
-static int
-foreach_dirinpath (search_path, base_name, func, data1, data2)
- const char *search_path;
- const char *base_name;
- foreach_callback_func *func;
- lt_ptr data1;
- lt_ptr data2;
-{
- int result = 0;
- int filenamesize = 0;
- size_t lenbase = LT_STRLEN (base_name);
- size_t argz_len = 0;
- char *argz = 0;
- char *filename = 0;
- char *canonical = 0;
-
- LT_DLMUTEX_LOCK ();
-
- if (!search_path || !*search_path)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND));
- goto cleanup;
- }
-
- if (canonicalize_path (search_path, &canonical) != 0)
- goto cleanup;
-
- if (argzize_path (canonical, &argz, &argz_len) != 0)
- goto cleanup;
-
- {
- char *dir_name = 0;
- while ((dir_name = argz_next (argz, argz_len, dir_name)))
- {
- size_t lendir = LT_STRLEN (dir_name);
-
- if (lendir +1 +lenbase >= filenamesize)
- {
- LT_DLFREE (filename);
- filenamesize = lendir +1 +lenbase +1; /* "/d" + '/' + "f" + '\0' */
- filename = LT_EMALLOC (char, filenamesize);
- if (!filename)
- goto cleanup;
- }
-
- assert (filenamesize > lendir);
- strcpy (filename, dir_name);
-
- if (base_name && *base_name)
- {
- if (filename[lendir -1] != '/')
- filename[lendir++] = '/';
- strcpy (filename +lendir, base_name);
- }
-
- if ((result = (*func) (filename, data1, data2)))
- {
- break;
- }
- }
- }
-
- cleanup:
- LT_DLFREE (argz);
- LT_DLFREE (canonical);
- LT_DLFREE (filename);
-
- LT_DLMUTEX_UNLOCK ();
-
- return result;
-}
-
-/* If FILEPATH can be opened, store the name of the directory component
- in DATA1, and the opened FILE* structure address in DATA2. Otherwise
- DATA1 is unchanged, but DATA2 is set to a pointer to NULL. */
-static int
-find_file_callback (filename, data1, data2)
- char *filename;
- lt_ptr data1;
- lt_ptr data2;
-{
- char **pdir = (char **) data1;
- FILE **pfile = (FILE **) data2;
- int is_done = 0;
-
- assert (filename && *filename);
- assert (pdir);
- assert (pfile);
-
- if ((*pfile = fopen (filename, LT_READTEXT_MODE)))
- {
- char *dirend = strrchr (filename, '/');
-
- if (dirend > filename)
- *dirend = LT_EOS_CHAR;
-
- LT_DLFREE (*pdir);
- *pdir = lt_estrdup (filename);
- is_done = (*pdir == 0) ? -1 : 1;
- }
-
- return is_done;
-}
-
-static FILE *
-find_file (search_path, base_name, pdir)
- const char *search_path;
- const char *base_name;
- char **pdir;
-{
- FILE *file = 0;
-
- foreach_dirinpath (search_path, base_name, find_file_callback, pdir, &file);
-
- return file;
-}
-
-static int
-find_handle_callback (filename, data, ignored)
- char *filename;
- lt_ptr data;
- lt_ptr ignored;
-{
- lt_dlhandle *handle = (lt_dlhandle *) data;
- int notfound = access (filename, R_OK);
-
- /* Bail out if file cannot be read... */
- if (notfound)
- return 0;
-
- /* Try to dlopen the file, but do not continue searching in any
- case. */
- if (tryall_dlopen (handle, filename) != 0)
- *handle = 0;
-
- return 1;
-}
-
-/* If HANDLE was found return it, otherwise return 0. If HANDLE was
- found but could not be opened, *HANDLE will be set to 0. */
-static lt_dlhandle *
-find_handle (search_path, base_name, handle)
- const char *search_path;
- const char *base_name;
- lt_dlhandle *handle;
-{
- if (!search_path)
- return 0;
-
- if (!foreach_dirinpath (search_path, base_name, find_handle_callback,
- handle, 0))
- return 0;
-
- return handle;
-}
-
-static int
-load_deplibs (handle, deplibs)
- lt_dlhandle handle;
- char *deplibs;
-{
-#if LTDL_DLOPEN_DEPLIBS
- char *p, *save_search_path = 0;
- int depcount = 0;
- int i;
- char **names = 0;
-#endif
- int errors = 0;
-
- handle->depcount = 0;
-
-#if LTDL_DLOPEN_DEPLIBS
- if (!deplibs)
- {
- return errors;
- }
- ++errors;
-
- LT_DLMUTEX_LOCK ();
- if (user_search_path)
- {
- save_search_path = lt_estrdup (user_search_path);
- if (!save_search_path)
- goto cleanup;
- }
-
- /* extract search paths and count deplibs */
- p = deplibs;
- while (*p)
- {
- if (!isspace ((int) *p))
- {
- char *end = p+1;
- while (*end && !isspace((int) *end))
- {
- ++end;
- }
-
- if (strncmp(p, "-L", 2) == 0 || strncmp(p, "-R", 2) == 0)
- {
- char save = *end;
- *end = 0; /* set a temporary string terminator */
- if (lt_dladdsearchdir(p+2))
- {
- goto cleanup;
- }
- *end = save;
- }
- else
- {
- ++depcount;
- }
-
- p = end;
- }
- else
- {
- ++p;
- }
- }
-
- if (!depcount)
- {
- errors = 0;
- goto cleanup;
- }
-
- names = LT_EMALLOC (char *, depcount * sizeof (char*));
- if (!names)
- goto cleanup;
-
- /* now only extract the actual deplibs */
- depcount = 0;
- p = deplibs;
- while (*p)
- {
- if (isspace ((int) *p))
- {
- ++p;
- }
- else
- {
- char *end = p+1;
- while (*end && !isspace ((int) *end))
- {
- ++end;
- }
-
- if (strncmp(p, "-L", 2) != 0 && strncmp(p, "-R", 2) != 0)
- {
- char *name;
- char save = *end;
- *end = 0; /* set a temporary string terminator */
- if (strncmp(p, "-l", 2) == 0)
- {
- size_t name_len = 3+ /* "lib" */ LT_STRLEN (p + 2);
- name = LT_EMALLOC (char, 1+ name_len);
- if (name)
- sprintf (name, "lib%s", p+2);
- }
- else
- name = lt_estrdup(p);
-
- if (!name)
- goto cleanup_names;
-
- names[depcount++] = name;
- *end = save;
- }
- p = end;
- }
- }
-
- /* load the deplibs (in reverse order)
- At this stage, don't worry if the deplibs do not load correctly,
- they may already be statically linked into the loading application
- for instance. There will be a more enlightening error message
- later on if the loaded module cannot resolve all of its symbols. */
- if (depcount)
- {
- int j = 0;
-
- handle->deplibs = (lt_dlhandle*) LT_EMALLOC (lt_dlhandle *, depcount);
- if (!handle->deplibs)
- goto cleanup_names;
-
- for (i = 0; i < depcount; ++i)
- {
- handle->deplibs[j] = lt_dlopenext(names[depcount-1-i]);
- if (handle->deplibs[j])
- {
- ++j;
- }
- }
-
- handle->depcount = j; /* Number of successfully loaded deplibs */
- errors = 0;
- }
-
- cleanup_names:
- for (i = 0; i < depcount; ++i)
- {
- LT_DLFREE (names[i]);
- }
-
- cleanup:
- LT_DLFREE (names);
- /* restore the old search path */
- if (user_search_path) {
- LT_DLFREE (user_search_path);
- user_search_path = save_search_path;
- }
- LT_DLMUTEX_UNLOCK ();
-
-#endif
-
- return errors;
-}
-
-static int
-unload_deplibs (handle)
- lt_dlhandle handle;
-{
- int i;
- int errors = 0;
-
- if (handle->depcount)
- {
- for (i = 0; i < handle->depcount; ++i)
- {
- if (!LT_DLIS_RESIDENT (handle->deplibs[i]))
- {
- errors += lt_dlclose (handle->deplibs[i]);
- }
- }
- LT_DLFREE (handle->deplibs);
- }
-
- return errors;
-}
-
-static int
-trim (dest, str)
- char **dest;
- const char *str;
-{
- /* remove the leading and trailing "'" from str
- and store the result in dest */
- const char *end = strrchr (str, '\'');
- size_t len = LT_STRLEN (str);
- char *tmp;
-
- LT_DLFREE (*dest);
-
- if (!end)
- return 1;
-
- if (len > 3 && str[0] == '\'')
- {
- tmp = LT_EMALLOC (char, end - str);
- if (!tmp)
- return 1;
-
- strncpy(tmp, &str[1], (end - str) - 1);
- tmp[len-3] = LT_EOS_CHAR;
- *dest = tmp;
- }
- else
- {
- *dest = 0;
- }
-
- return 0;
-}
-
-static int
-free_vars (dlname, oldname, libdir, deplibs)
- char *dlname;
- char *oldname;
- char *libdir;
- char *deplibs;
-{
- LT_DLFREE (dlname);
- LT_DLFREE (oldname);
- LT_DLFREE (libdir);
- LT_DLFREE (deplibs);
-
- return 0;
-}
-
-static int
-try_dlopen (phandle, filename)
- lt_dlhandle *phandle;
- const char *filename;
-{
- const char * ext = 0;
- const char * saved_error = 0;
- char * canonical = 0;
- char * base_name = 0;
- char * dir = 0;
- char * name = 0;
- int errors = 0;
- lt_dlhandle newhandle;
-
- assert (phandle);
- assert (*phandle == 0);
-
- LT_DLMUTEX_GETERROR (saved_error);
-
- /* dlopen self? */
- if (!filename)
- {
- *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1);
- if (*phandle == 0)
- return 1;
-
- memset (*phandle, 0, sizeof(struct lt_dlhandle_struct));
- newhandle = *phandle;
-
- /* lt_dlclose()ing yourself is very bad! Disallow it. */
- LT_DLSET_FLAG (*phandle, LT_DLRESIDENT_FLAG);
-
- if (tryall_dlopen (&newhandle, 0) != 0)
- {
- LT_DLFREE (*phandle);
- return 1;
- }
-
- goto register_handle;
- }
-
- assert (filename && *filename);
-
- /* Doing this immediately allows internal functions to safely
- assume only canonicalized paths are passed. */
- if (canonicalize_path (filename, &canonical) != 0)
- {
- ++errors;
- goto cleanup;
- }
-
- /* If the canonical module name is a path (relative or absolute)
- then split it into a directory part and a name part. */
- base_name = strrchr (canonical, '/');
- if (base_name)
- {
- size_t dirlen = (1+ base_name) - canonical;
-
- dir = LT_EMALLOC (char, 1+ dirlen);
- if (!dir)
- {
- ++errors;
- goto cleanup;
- }
-
- strncpy (dir, canonical, dirlen);
- dir[dirlen] = LT_EOS_CHAR;
-
- ++base_name;
- }
- else
- base_name = canonical;
-
- assert (base_name && *base_name);
-
- /* Check whether we are opening a libtool module (.la extension). */
- ext = strrchr (base_name, '.');
- if (ext && strcmp (ext, archive_ext) == 0)
- {
- /* this seems to be a libtool module */
- FILE * file = 0;
- char * dlname = 0;
- char * old_name = 0;
- char * libdir = 0;
- char * deplibs = 0;
- char * line = 0;
- size_t line_len;
-
- /* if we can't find the installed flag, it is probably an
- installed libtool archive, produced with an old version
- of libtool */
- int installed = 1;
-
- /* extract the module name from the file name */
- name = LT_EMALLOC (char, ext - base_name + 1);
- if (!name)
- {
- ++errors;
- goto cleanup;
- }
-
- /* canonicalize the module name */
- {
- size_t i;
- for (i = 0; i < ext - base_name; ++i)
- {
- if (isalnum ((int)(base_name[i])))
- {
- name[i] = base_name[i];
- }
- else
- {
- name[i] = '_';
- }
- }
- name[ext - base_name] = LT_EOS_CHAR;
- }
-
- /* Now try to open the .la file. If there is no directory name
- component, try to find it first in user_search_path and then other
- prescribed paths. Otherwise (or in any case if the module was not
- yet found) try opening just the module name as passed. */
- if (!dir)
- {
- const char *search_path;
-
- LT_DLMUTEX_LOCK ();
- search_path = user_search_path;
- if (search_path)
- file = find_file (user_search_path, base_name, &dir);
- LT_DLMUTEX_UNLOCK ();
-
- if (!file)
- {
- search_path = getenv (LTDL_SEARCHPATH_VAR);
- if (search_path)
- file = find_file (search_path, base_name, &dir);
- }
-
-#ifdef LTDL_SHLIBPATH_VAR
- if (!file)
- {
- search_path = getenv (LTDL_SHLIBPATH_VAR);
- if (search_path)
- file = find_file (search_path, base_name, &dir);
- }
-#endif
-#ifdef LTDL_SYSSEARCHPATH
- if (!file && sys_search_path)
- {
- file = find_file (sys_search_path, base_name, &dir);
- }
-#endif
- }
- if (!file)
- {
- /* don't open .la files in current directory, root might get tricked to run a binary in a prepared directory */
- if(!strncmp((filename + strlen(filename) - 3), LTDL_ARCHIVE_EXT,3) || strstr(filename,"/"))
- file = fopen (filename, LT_READTEXT_MODE);
- }
-
- /* If we didn't find the file by now, it really isn't there. Set
- the status flag, and bail out. */
- if (!file)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND));
- ++errors;
- goto cleanup;
- }
-
- line_len = LT_FILENAME_MAX;
- line = LT_EMALLOC (char, line_len);
- if (!line)
- {
- fclose (file);
- ++errors;
- goto cleanup;
- }
-
- /* read the .la file */
- while (!feof (file))
- {
- if (!fgets (line, (int) line_len, file))
- {
- break;
- }
-
- /* Handle the case where we occasionally need to read a line
- that is longer than the initial buffer size. */
- while ((line[LT_STRLEN(line) -1] != '\n') && (!feof (file)))
- {
- line = LT_DLREALLOC (char, line, line_len *2);
- if (!fgets (&line[line_len -1], (int) line_len +1, file))
- {
- break;
- }
- line_len *= 2;
- }
-
- if (line[0] == '\n' || line[0] == '#')
- {
- continue;
- }
-
-#undef STR_DLNAME
-#define STR_DLNAME "dlname="
- if (strncmp (line, STR_DLNAME, sizeof (STR_DLNAME) - 1) == 0)
- {
- errors += trim (&dlname, &line[sizeof (STR_DLNAME) - 1]);
- }
-
-#undef STR_OLD_LIBRARY
-#define STR_OLD_LIBRARY "old_library="
- else if (strncmp (line, STR_OLD_LIBRARY,
- sizeof (STR_OLD_LIBRARY) - 1) == 0)
- {
- errors += trim (&old_name, &line[sizeof (STR_OLD_LIBRARY) - 1]);
- }
-#undef STR_LIBDIR
-#define STR_LIBDIR "libdir="
- else if (strncmp (line, STR_LIBDIR, sizeof (STR_LIBDIR) - 1) == 0)
- {
- errors += trim (&libdir, &line[sizeof(STR_LIBDIR) - 1]);
- }
-
-#undef STR_DL_DEPLIBS
-#define STR_DL_DEPLIBS "dependency_libs="
- else if (strncmp (line, STR_DL_DEPLIBS,
- sizeof (STR_DL_DEPLIBS) - 1) == 0)
- {
- errors += trim (&deplibs, &line[sizeof (STR_DL_DEPLIBS) - 1]);
- }
- else if (strcmp (line, "installed=yes\n") == 0)
- {
- installed = 1;
- }
- else if (strcmp (line, "installed=no\n") == 0)
- {
- installed = 0;
- }
-
-#undef STR_LIBRARY_NAMES
-#define STR_LIBRARY_NAMES "library_names="
- else if (! dlname && strncmp (line, STR_LIBRARY_NAMES,
- sizeof (STR_LIBRARY_NAMES) - 1) == 0)
- {
- char *last_libname;
- errors += trim (&dlname, &line[sizeof (STR_LIBRARY_NAMES) - 1]);
- if (!errors
- && dlname
- && (last_libname = strrchr (dlname, ' ')) != 0)
- {
- last_libname = lt_estrdup (last_libname + 1);
- if (!last_libname)
- {
- ++errors;
- goto cleanup;
- }
- LT_DLMEM_REASSIGN (dlname, last_libname);
- }
- }
-
- if (errors)
- break;
- }
-
- fclose (file);
- LT_DLFREE (line);
-
- /* allocate the handle */
- *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1);
- if (*phandle == 0)
- ++errors;
-
- if (errors)
- {
- free_vars (dlname, old_name, libdir, deplibs);
- LT_DLFREE (*phandle);
- goto cleanup;
- }
-
- assert (*phandle);
-
- memset (*phandle, 0, sizeof(struct lt_dlhandle_struct));
- if (load_deplibs (*phandle, deplibs) == 0)
- {
- newhandle = *phandle;
- /* find_module may replace newhandle */
- if (find_module (&newhandle, dir, libdir, dlname, old_name, installed))
- {
- unload_deplibs (*phandle);
- ++errors;
- }
- }
- else
- {
- ++errors;
- }
-
- free_vars (dlname, old_name, libdir, deplibs);
- if (errors)
- {
- LT_DLFREE (*phandle);
- goto cleanup;
- }
-
- if (*phandle != newhandle)
- {
- unload_deplibs (*phandle);
- }
- }
- else
- {
- /* not a libtool module */
- *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1);
- if (*phandle == 0)
- {
- ++errors;
- goto cleanup;
- }
-
- memset (*phandle, 0, sizeof (struct lt_dlhandle_struct));
- newhandle = *phandle;
-
- /* If the module has no directory name component, try to find it
- first in user_search_path and then other prescribed paths.
- Otherwise (or in any case if the module was not yet found) try
- opening just the module name as passed. */
- if ((dir || (!find_handle (user_search_path, base_name, &newhandle)
- && !find_handle (getenv (LTDL_SEARCHPATH_VAR), base_name,
- &newhandle)
-#ifdef LTDL_SHLIBPATH_VAR
- && !find_handle (getenv (LTDL_SHLIBPATH_VAR), base_name,
- &newhandle)
-#endif
-#ifdef LTDL_SYSSEARCHPATH
- && !find_handle (sys_search_path, base_name, &newhandle)
-#endif
- )))
- {
- if (tryall_dlopen (&newhandle, filename) != 0)
- {
- newhandle = NULL;
- }
- }
-
- if (!newhandle)
- {
- LT_DLFREE (*phandle);
- ++errors;
- goto cleanup;
- }
- }
-
- register_handle:
- LT_DLMEM_REASSIGN (*phandle, newhandle);
-
- if ((*phandle)->info.ref_count == 0)
- {
- (*phandle)->info.ref_count = 1;
- LT_DLMEM_REASSIGN ((*phandle)->info.name, name);
-
- LT_DLMUTEX_LOCK ();
- (*phandle)->next = handles;
- handles = *phandle;
- LT_DLMUTEX_UNLOCK ();
- }
-
- LT_DLMUTEX_SETERROR (saved_error);
-
- cleanup:
- LT_DLFREE (dir);
- LT_DLFREE (name);
- LT_DLFREE (canonical);
-
- return errors;
-}
-
-lt_dlhandle
-lt_dlopen (filename)
- const char *filename;
-{
- lt_dlhandle handle = 0;
-
- /* Just incase we missed a code path in try_dlopen() that reports
- an error, but forgets to reset handle... */
- if (try_dlopen (&handle, filename) != 0)
- return 0;
-
- return handle;
-}
-
-/* If the last error messge store was `FILE_NOT_FOUND', then return
- non-zero. */
-static int
-file_not_found ()
-{
- const char *error = 0;
-
- LT_DLMUTEX_GETERROR (error);
- if (error == LT_DLSTRERROR (FILE_NOT_FOUND))
- return 1;
-
- return 0;
-}
-
-/* If FILENAME has an ARCHIVE_EXT or SHLIB_EXT extension, try to
- open the FILENAME as passed. Otherwise try appending ARCHIVE_EXT,
- and if a file is still not found try again with SHLIB_EXT appended
- instead. */
-lt_dlhandle
-lt_dlopenext (filename)
- const char *filename;
-{
- lt_dlhandle handle = 0;
- char * tmp = 0;
- char * ext = 0;
- size_t len;
- int errors = 0;
-
- if (!filename)
- {
- return lt_dlopen (filename);
- }
-
- assert (filename);
-
- len = LT_STRLEN (filename);
- ext = strrchr (filename, '.');
-
- /* If FILENAME already bears a suitable extension, there is no need
- to try appending additional extensions. */
- if (ext && ((strcmp (ext, archive_ext) == 0)
-#ifdef LTDL_SHLIB_EXT
- || (strcmp (ext, shlib_ext) == 0)
-#endif
- ))
- {
- return lt_dlopen (filename);
- }
-
- /* First try appending ARCHIVE_EXT. */
- tmp = LT_EMALLOC (char, len + LT_STRLEN (archive_ext) + 1);
- if (!tmp)
- return 0;
-
- strcpy (tmp, filename);
- strcat (tmp, archive_ext);
- errors = try_dlopen (&handle, tmp);
-
- /* If we found FILENAME, stop searching -- whether we were able to
- load the file as a module or not. If the file exists but loading
- failed, it is better to return an error message here than to
- report FILE_NOT_FOUND when the alternatives (foo.so etc) are not
- in the module search path. */
- if (handle || ((errors > 0) && !file_not_found ()))
- {
- LT_DLFREE (tmp);
- return handle;
- }
-
-#ifdef LTDL_SHLIB_EXT
- /* Try appending SHLIB_EXT. */
- if (LT_STRLEN (shlib_ext) > LT_STRLEN (archive_ext))
- {
- LT_DLFREE (tmp);
- tmp = LT_EMALLOC (char, len + LT_STRLEN (shlib_ext) + 1);
- if (!tmp)
- return 0;
-
- strcpy (tmp, filename);
- }
- else
- {
- tmp[len] = LT_EOS_CHAR;
- }
-
- strcat(tmp, shlib_ext);
- errors = try_dlopen (&handle, tmp);
-
- /* As before, if the file was found but loading failed, return now
- with the current error message. */
- if (handle || ((errors > 0) && !file_not_found ()))
- {
- LT_DLFREE (tmp);
- return handle;
- }
-#endif
-
- /* Still here? Then we really did fail to locate any of the file
- names we tried. */
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND));
- LT_DLFREE (tmp);
- return 0;
-}
-
-
-static int
-lt_argz_insert (pargz, pargz_len, before, entry)
- char **pargz;
- size_t *pargz_len;
- char *before;
- const char *entry;
-{
- error_t error;
-
- /* Prior to Sep 8, 2005, newlib had a bug where argz_insert(pargz,
- pargz_len, NULL, entry) failed with EINVAL. */
- if (before)
- error = argz_insert (pargz, pargz_len, before, entry);
- else
- error = argz_append (pargz, pargz_len, entry, 1 + LT_STRLEN (entry));
-
- if (error)
- {
- switch (error)
- {
- case ENOMEM:
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY));
- break;
- default:
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (UNKNOWN));
- break;
- }
- return 1;
- }
-
- return 0;
-}
-
-static int
-lt_argz_insertinorder (pargz, pargz_len, entry)
- char **pargz;
- size_t *pargz_len;
- const char *entry;
-{
- char *before = 0;
-
- assert (pargz);
- assert (pargz_len);
- assert (entry && *entry);
-
- if (*pargz)
- while ((before = argz_next (*pargz, *pargz_len, before)))
- {
- int cmp = strcmp (entry, before);
-
- if (cmp < 0) break;
- if (cmp == 0) return 0; /* No duplicates! */
- }
-
- return lt_argz_insert (pargz, pargz_len, before, entry);
-}
-
-static int
-lt_argz_insertdir (pargz, pargz_len, dirnam, dp)
- char **pargz;
- size_t *pargz_len;
- const char *dirnam;
- struct dirent *dp;
-{
- char *buf = 0;
- size_t buf_len = 0;
- char *end = 0;
- size_t end_offset = 0;
- size_t dir_len = 0;
- int errors = 0;
-
- assert (pargz);
- assert (pargz_len);
- assert (dp);
-
- dir_len = LT_STRLEN (dirnam);
- end = dp->d_name + LT_D_NAMLEN(dp);
-
- /* Ignore version numbers. */
- {
- char *p;
- for (p = end; p -1 > dp->d_name; --p)
- if (strchr (".0123456789", p[-1]) == 0)
- break;
-
- if (*p == '.')
- end = p;
- }
-
- /* Ignore filename extension. */
- {
- char *p;
- for (p = end -1; p > dp->d_name; --p)
- if (*p == '.')
- {
- end = p;
- break;
- }
- }
-
- /* Prepend the directory name. */
- end_offset = end - dp->d_name;
- buf_len = dir_len + 1+ end_offset;
- buf = LT_EMALLOC (char, 1+ buf_len);
- if (!buf)
- return ++errors;
-
- assert (buf);
-
- strcpy (buf, dirnam);
- strcat (buf, "/");
- strncat (buf, dp->d_name, end_offset);
- buf[buf_len] = LT_EOS_CHAR;
-
- /* Try to insert (in order) into ARGZ/ARGZ_LEN. */
- if (lt_argz_insertinorder (pargz, pargz_len, buf) != 0)
- ++errors;
-
- LT_DLFREE (buf);
-
- return errors;
-}
-
-static int
-list_files_by_dir (dirnam, pargz, pargz_len)
- const char *dirnam;
- char **pargz;
- size_t *pargz_len;
-{
- DIR *dirp = 0;
- int errors = 0;
-
- assert (dirnam && *dirnam);
- assert (pargz);
- assert (pargz_len);
- assert (dirnam[LT_STRLEN(dirnam) -1] != '/');
-
- dirp = opendir (dirnam);
- if (dirp)
- {
- struct dirent *dp = 0;
-
- while ((dp = readdir (dirp)))
- if (dp->d_name[0] != '.')
- if (lt_argz_insertdir (pargz, pargz_len, dirnam, dp))
- {
- ++errors;
- break;
- }
-
- closedir (dirp);
- }
- else
- ++errors;
-
- return errors;
-}
-
-
-/* If there are any files in DIRNAME, call the function passed in
- DATA1 (with the name of each file and DATA2 as arguments). */
-static int
-foreachfile_callback (dirname, data1, data2)
- char *dirname;
- lt_ptr data1;
- lt_ptr data2;
-{
- int (*func) LT_PARAMS((const char *filename, lt_ptr data))
- = (int (*) LT_PARAMS((const char *filename, lt_ptr data))) data1;
-
- int is_done = 0;
- char *argz = 0;
- size_t argz_len = 0;
-
- if (list_files_by_dir (dirname, &argz, &argz_len) != 0)
- goto cleanup;
- if (!argz)
- goto cleanup;
-
- {
- char *filename = 0;
- while ((filename = argz_next (argz, argz_len, filename)))
- if ((is_done = (*func) (filename, data2)))
- break;
- }
-
- cleanup:
- LT_DLFREE (argz);
-
- return is_done;
-}
-
-
-/* Call FUNC for each unique extensionless file in SEARCH_PATH, along
- with DATA. The filenames passed to FUNC would be suitable for
- passing to lt_dlopenext. The extensions are stripped so that
- individual modules do not generate several entries (e.g. libfoo.la,
- libfoo.so, libfoo.so.1, libfoo.so.1.0.0). If SEARCH_PATH is NULL,
- then the same directories that lt_dlopen would search are examined. */
-int
-lt_dlforeachfile (search_path, func, data)
- const char *search_path;
- int (*func) LT_PARAMS ((const char *filename, lt_ptr data));
- lt_ptr data;
-{
- int is_done = 0;
-
- if (search_path)
- {
- /* If a specific path was passed, search only the directories
- listed in it. */
- is_done = foreach_dirinpath (search_path, 0,
- foreachfile_callback, func, data);
- }
- else
- {
- /* Otherwise search the default paths. */
- is_done = foreach_dirinpath (user_search_path, 0,
- foreachfile_callback, func, data);
- if (!is_done)
- {
- is_done = foreach_dirinpath (getenv("LTDL_LIBRARY_PATH"), 0,
- foreachfile_callback, func, data);
- }
-
-#ifdef LTDL_SHLIBPATH_VAR
- if (!is_done)
- {
- is_done = foreach_dirinpath (getenv(LTDL_SHLIBPATH_VAR), 0,
- foreachfile_callback, func, data);
- }
-#endif
-#ifdef LTDL_SYSSEARCHPATH
- if (!is_done)
- {
- is_done = foreach_dirinpath (getenv(LTDL_SYSSEARCHPATH), 0,
- foreachfile_callback, func, data);
- }
-#endif
- }
-
- return is_done;
-}
-
-int
-lt_dlclose (handle)
- lt_dlhandle handle;
-{
- lt_dlhandle cur, last;
- int errors = 0;
-
- LT_DLMUTEX_LOCK ();
-
- /* check whether the handle is valid */
- last = cur = handles;
- while (cur && handle != cur)
- {
- last = cur;
- cur = cur->next;
- }
-
- if (!cur)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE));
- ++errors;
- goto done;
- }
-
- handle->info.ref_count--;
-
- /* Note that even with resident modules, we must track the ref_count
- correctly incase the user decides to reset the residency flag
- later (even though the API makes no provision for that at the
- moment). */
- if (handle->info.ref_count <= 0 && !LT_DLIS_RESIDENT (handle))
- {
- lt_user_data data = handle->loader->dlloader_data;
-
- if (handle != handles)
- {
- last->next = handle->next;
- }
- else
- {
- handles = handle->next;
- }
-
- errors += handle->loader->module_close (data, handle->module);
- errors += unload_deplibs(handle);
-
- /* It is up to the callers to free the data itself. */
- LT_DLFREE (handle->caller_data);
-
- LT_DLFREE (handle->info.filename);
- LT_DLFREE (handle->info.name);
- LT_DLFREE (handle);
-
- goto done;
- }
-
- if (LT_DLIS_RESIDENT (handle))
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CLOSE_RESIDENT_MODULE));
- ++errors;
- }
-
- done:
- LT_DLMUTEX_UNLOCK ();
-
- return errors;
-}
-
-lt_ptr
-lt_dlsym (handle, symbol)
- lt_dlhandle handle;
- const char *symbol;
-{
- size_t lensym;
- char lsym[LT_SYMBOL_LENGTH];
- char *sym;
- lt_ptr address;
- lt_user_data data;
-
- if (!handle)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE));
- return 0;
- }
-
- if (!symbol)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND));
- return 0;
- }
-
- lensym = LT_STRLEN (symbol) + LT_STRLEN (handle->loader->sym_prefix)
- + LT_STRLEN (handle->info.name);
-
- if (lensym + LT_SYMBOL_OVERHEAD < LT_SYMBOL_LENGTH)
- {
- sym = lsym;
- }
- else
- {
- sym = LT_EMALLOC (char, lensym + LT_SYMBOL_OVERHEAD + 1);
- if (!sym)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (BUFFER_OVERFLOW));
- return 0;
- }
- }
-
- data = handle->loader->dlloader_data;
- if (handle->info.name)
- {
- const char *saved_error;
-
- LT_DLMUTEX_GETERROR (saved_error);
-
- /* this is a libtool module */
- if (handle->loader->sym_prefix)
- {
- strcpy(sym, handle->loader->sym_prefix);
- strcat(sym, handle->info.name);
- }
- else
- {
- strcpy(sym, handle->info.name);
- }
-
- strcat(sym, "_LTX_");
- strcat(sym, symbol);
-
- /* try "modulename_LTX_symbol" */
- address = handle->loader->find_sym (data, handle->module, sym);
- if (address)
- {
- if (sym != lsym)
- {
- LT_DLFREE (sym);
- }
- return address;
- }
- LT_DLMUTEX_SETERROR (saved_error);
- }
-
- /* otherwise try "symbol" */
- if (handle->loader->sym_prefix)
- {
- strcpy(sym, handle->loader->sym_prefix);
- strcat(sym, symbol);
- }
- else
- {
- strcpy(sym, symbol);
- }
-
- address = handle->loader->find_sym (data, handle->module, sym);
- if (sym != lsym)
- {
- LT_DLFREE (sym);
- }
-
- return address;
-}
-
-const char *
-lt_dlerror ()
-{
- const char *error;
-
- LT_DLMUTEX_GETERROR (error);
- LT_DLMUTEX_SETERROR (0);
-
- return error ? error : NULL;
-}
-
-static int
-lt_dlpath_insertdir (ppath, before, dir)
- char **ppath;
- char *before;
- const char *dir;
-{
- int errors = 0;
- char *canonical = 0;
- char *argz = 0;
- size_t argz_len = 0;
-
- assert (ppath);
- assert (dir && *dir);
-
- if (canonicalize_path (dir, &canonical) != 0)
- {
- ++errors;
- goto cleanup;
- }
-
- assert (canonical && *canonical);
-
- /* If *PPATH is empty, set it to DIR. */
- if (*ppath == 0)
- {
- assert (!before); /* BEFORE cannot be set without PPATH. */
- assert (dir); /* Without DIR, don't call this function! */
-
- *ppath = lt_estrdup (dir);
- if (*ppath == 0)
- ++errors;
-
- return errors;
- }
-
- assert (ppath && *ppath);
-
- if (argzize_path (*ppath, &argz, &argz_len) != 0)
- {
- ++errors;
- goto cleanup;
- }
-
- /* Convert BEFORE into an equivalent offset into ARGZ. This only works
- if *PPATH is already canonicalized, and hence does not change length
- with respect to ARGZ. We canonicalize each entry as it is added to
- the search path, and don't call this function with (uncanonicalized)
- user paths, so this is a fair assumption. */
- if (before)
- {
- assert (*ppath <= before);
- assert (before - *ppath <= strlen (*ppath));
-
- before = before - *ppath + argz;
- }
-
- if (lt_argz_insert (&argz, &argz_len, before, dir) != 0)
- {
- ++errors;
- goto cleanup;
- }
-
- argz_stringify (argz, argz_len, LT_PATHSEP_CHAR);
- LT_DLMEM_REASSIGN (*ppath, argz);
-
- cleanup:
- LT_DLFREE (canonical);
- LT_DLFREE (argz);
-
- return errors;
-}
-
-int
-lt_dladdsearchdir (search_dir)
- const char *search_dir;
-{
- int errors = 0;
-
- if (search_dir && *search_dir)
- {
- LT_DLMUTEX_LOCK ();
- if (lt_dlpath_insertdir (&user_search_path, 0, search_dir) != 0)
- ++errors;
- LT_DLMUTEX_UNLOCK ();
- }
-
- return errors;
-}
-
-int
-lt_dlinsertsearchdir (before, search_dir)
- const char *before;
- const char *search_dir;
-{
- int errors = 0;
-
- if (before)
- {
- LT_DLMUTEX_LOCK ();
- if ((before < user_search_path)
- || (before >= user_search_path + LT_STRLEN (user_search_path)))
- {
- LT_DLMUTEX_UNLOCK ();
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_POSITION));
- return 1;
- }
- LT_DLMUTEX_UNLOCK ();
- }
-
- if (search_dir && *search_dir)
- {
- LT_DLMUTEX_LOCK ();
- if (lt_dlpath_insertdir (&user_search_path,
- (char *) before, search_dir) != 0)
- {
- ++errors;
- }
- LT_DLMUTEX_UNLOCK ();
- }
-
- return errors;
-}
-
-int
-lt_dlsetsearchpath (search_path)
- const char *search_path;
-{
- int errors = 0;
-
- LT_DLMUTEX_LOCK ();
- LT_DLFREE (user_search_path);
- LT_DLMUTEX_UNLOCK ();
-
- if (!search_path || !LT_STRLEN (search_path))
- {
- return errors;
- }
-
- LT_DLMUTEX_LOCK ();
- if (canonicalize_path (search_path, &user_search_path) != 0)
- ++errors;
- LT_DLMUTEX_UNLOCK ();
-
- return errors;
-}
-
-const char *
-lt_dlgetsearchpath ()
-{
- const char *saved_path;
-
- LT_DLMUTEX_LOCK ();
- saved_path = user_search_path;
- LT_DLMUTEX_UNLOCK ();
-
- return saved_path;
-}
-
-int
-lt_dlmakeresident (handle)
- lt_dlhandle handle;
-{
- int errors = 0;
-
- if (!handle)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE));
- ++errors;
- }
- else
- {
- LT_DLSET_FLAG (handle, LT_DLRESIDENT_FLAG);
- }
-
- return errors;
-}
-
-int
-lt_dlisresident (handle)
- lt_dlhandle handle;
-{
- if (!handle)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE));
- return -1;
- }
-
- return LT_DLIS_RESIDENT (handle);
-}
-
-
-
-\f
-/* --- MODULE INFORMATION --- */
-
-const lt_dlinfo *
-lt_dlgetinfo (handle)
- lt_dlhandle handle;
-{
- if (!handle)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE));
- return 0;
- }
-
- return &(handle->info);
-}
-
-lt_dlhandle
-lt_dlhandle_next (place)
- lt_dlhandle place;
-{
- return place ? place->next : handles;
-}
-
-int
-lt_dlforeach (func, data)
- int (*func) LT_PARAMS((lt_dlhandle handle, lt_ptr data));
- lt_ptr data;
-{
- int errors = 0;
- lt_dlhandle cur;
-
- LT_DLMUTEX_LOCK ();
-
- cur = handles;
- while (cur)
- {
- lt_dlhandle tmp = cur;
-
- cur = cur->next;
- if ((*func) (tmp, data))
- {
- ++errors;
- break;
- }
- }
-
- LT_DLMUTEX_UNLOCK ();
-
- return errors;
-}
-
-lt_dlcaller_id
-lt_dlcaller_register ()
-{
- static lt_dlcaller_id last_caller_id = 0;
- int result;
-
- LT_DLMUTEX_LOCK ();
- result = ++last_caller_id;
- LT_DLMUTEX_UNLOCK ();
-
- return result;
-}
-
-lt_ptr
-lt_dlcaller_set_data (key, handle, data)
- lt_dlcaller_id key;
- lt_dlhandle handle;
- lt_ptr data;
-{
- int n_elements = 0;
- lt_ptr stale = (lt_ptr) 0;
- int i;
-
- /* This needs to be locked so that the caller data can be updated
- simultaneously by different threads. */
- LT_DLMUTEX_LOCK ();
-
- if (handle->caller_data)
- while (handle->caller_data[n_elements].key)
- ++n_elements;
-
- for (i = 0; i < n_elements; ++i)
- {
- if (handle->caller_data[i].key == key)
- {
- stale = handle->caller_data[i].data;
- break;
- }
- }
-
- /* Ensure that there is enough room in this handle's caller_data
- array to accept a new element (and an empty end marker). */
- if (i == n_elements)
- {
- lt_caller_data *temp
- = LT_DLREALLOC (lt_caller_data, handle->caller_data, 2+ n_elements);
-
- if (!temp)
- {
- stale = 0;
- goto done;
- }
-
- handle->caller_data = temp;
-
- /* We only need this if we needed to allocate a new caller_data. */
- handle->caller_data[i].key = key;
- handle->caller_data[1+ i].key = 0;
- }
-
- handle->caller_data[i].data = data;
-
- done:
- LT_DLMUTEX_UNLOCK ();
-
- return stale;
-}
-
-lt_ptr
-lt_dlcaller_get_data (key, handle)
- lt_dlcaller_id key;
- lt_dlhandle handle;
-{
- lt_ptr result = (lt_ptr) 0;
-
- /* This needs to be locked so that the caller data isn't updated by
- another thread part way through this function. */
- LT_DLMUTEX_LOCK ();
-
- /* Locate the index of the element with a matching KEY. */
- {
- int i;
- for (i = 0; handle->caller_data[i].key; ++i)
- {
- if (handle->caller_data[i].key == key)
- {
- result = handle->caller_data[i].data;
- break;
- }
- }
- }
-
- LT_DLMUTEX_UNLOCK ();
-
- return result;
-}
-
-
-\f
-/* --- USER MODULE LOADER API --- */
-
-
-int
-lt_dlloader_add (place, dlloader, loader_name)
- lt_dlloader *place;
- const struct lt_user_dlloader *dlloader;
- const char *loader_name;
-{
- int errors = 0;
- lt_dlloader *node = 0, *ptr = 0;
-
- if ((dlloader == 0) /* diagnose null parameters */
- || (dlloader->module_open == 0)
- || (dlloader->module_close == 0)
- || (dlloader->find_sym == 0))
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER));
- return 1;
- }
-
- /* Create a new dlloader node with copies of the user callbacks. */
- node = LT_EMALLOC (lt_dlloader, 1);
- if (!node)
- return 1;
-
- node->next = 0;
- node->loader_name = loader_name;
- node->sym_prefix = dlloader->sym_prefix;
- node->dlloader_exit = dlloader->dlloader_exit;
- node->module_open = dlloader->module_open;
- node->module_close = dlloader->module_close;
- node->find_sym = dlloader->find_sym;
- node->dlloader_data = dlloader->dlloader_data;
-
- LT_DLMUTEX_LOCK ();
- if (!loaders)
- {
- /* If there are no loaders, NODE becomes the list! */
- loaders = node;
- }
- else if (!place)
- {
- /* If PLACE is not set, add NODE to the end of the
- LOADERS list. */
- for (ptr = loaders; ptr->next; ptr = ptr->next)
- {
- /*NOWORK*/;
- }
-
- ptr->next = node;
- }
- else if (loaders == place)
- {
- /* If PLACE is the first loader, NODE goes first. */
- node->next = place;
- loaders = node;
- }
- else
- {
- /* Find the node immediately preceding PLACE. */
- for (ptr = loaders; ptr->next != place; ptr = ptr->next)
- {
- /*NOWORK*/;
- }
-
- if (ptr->next != place)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER));
- ++errors;
- }
- else
- {
- /* Insert NODE between PTR and PLACE. */
- node->next = place;
- ptr->next = node;
- }
- }
-
- LT_DLMUTEX_UNLOCK ();
-
- return errors;
-}
-
-int
-lt_dlloader_remove (loader_name)
- const char *loader_name;
-{
- lt_dlloader *place = lt_dlloader_find (loader_name);
- lt_dlhandle handle;
- int errors = 0;
-
- if (!place)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER));
- return 1;
- }
-
- LT_DLMUTEX_LOCK ();
-
- /* Fail if there are any open modules which use this loader. */
- for (handle = handles; handle; handle = handle->next)
- {
- if (handle->loader == place)
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (REMOVE_LOADER));
- ++errors;
- goto done;
- }
- }
-
- if (place == loaders)
- {
- /* PLACE is the first loader in the list. */
- loaders = loaders->next;
- }
- else
- {
- /* Find the loader before the one being removed. */
- lt_dlloader *prev;
- for (prev = loaders; prev->next; prev = prev->next)
- {
- if (!strcmp (prev->next->loader_name, loader_name))
- {
- break;
- }
- }
-
- place = prev->next;
- prev->next = prev->next->next;
- }
-
- if (place->dlloader_exit)
- {
- errors = place->dlloader_exit (place->dlloader_data);
- }
-
- LT_DLFREE (place);
-
- done:
- LT_DLMUTEX_UNLOCK ();
-
- return errors;
-}
-
-lt_dlloader *
-lt_dlloader_next (place)
- lt_dlloader *place;
-{
- lt_dlloader *next;
-
- LT_DLMUTEX_LOCK ();
- next = place ? place->next : loaders;
- LT_DLMUTEX_UNLOCK ();
-
- return next;
-}
-
-const char *
-lt_dlloader_name (place)
- lt_dlloader *place;
-{
- const char *name = 0;
-
- if (place)
- {
- LT_DLMUTEX_LOCK ();
- name = place ? place->loader_name : 0;
- LT_DLMUTEX_UNLOCK ();
- }
- else
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER));
- }
-
- return name;
-}
-
-lt_user_data *
-lt_dlloader_data (place)
- lt_dlloader *place;
-{
- lt_user_data *data = 0;
-
- if (place)
- {
- LT_DLMUTEX_LOCK ();
- data = place ? &(place->dlloader_data) : 0;
- LT_DLMUTEX_UNLOCK ();
- }
- else
- {
- LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER));
- }
-
- return data;
-}
-
-lt_dlloader *
-lt_dlloader_find (loader_name)
- const char *loader_name;
-{
- lt_dlloader *place = 0;
-
- LT_DLMUTEX_LOCK ();
- for (place = loaders; place; place = place->next)
- {
- if (strcmp (place->loader_name, loader_name) == 0)
- {
- break;
- }
- }
- LT_DLMUTEX_UNLOCK ();
-
- return place;
-}
+/* ltdl.c -- system independent dlopen wrapper
+
+ Copyright (C) 1998, 1999, 2000, 2004, 2005, 2006,
+ 2007, 2008 Free Software Foundation, Inc.
+ Written by Thomas Tanner, 1998
+
+ NOTE: The canonical source of this file is maintained with the
+ GNU Libtool package. Report bugs to bug-libtool@gnu.org.
+
+GNU Libltdl is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+As a special exception to the GNU Lesser General Public License,
+if you distribute this file as part of a program or library that
+is built using GNU Libtool, you may include this file under the
+same distribution terms that you use for the rest of that program.
+
+GNU Libltdl is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with GNU Libltdl; see the file COPYING.LIB. If not, a
+copy can be downloaded from http://www.gnu.org/licenses/lgpl.html,
+or obtained by writing to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+*/
+
+#include "lt__private.h"
+#include "lt_system.h"
+#include "lt_dlloader.h"
+
+
+/* --- MANIFEST CONSTANTS --- */
+
+
+/* Standard libltdl search path environment variable name */
+#undef LTDL_SEARCHPATH_VAR
+#define LTDL_SEARCHPATH_VAR "LTDL_LIBRARY_PATH"
+
+/* Standard libtool archive file extension. */
+#undef LT_ARCHIVE_EXT
+#define LT_ARCHIVE_EXT ".la"
+
+/* max. filename length */
+#if !defined(LT_FILENAME_MAX)
+# define LT_FILENAME_MAX 1024
+#endif
+
+#if !defined(LT_LIBEXT)
+# define LT_LIBEXT "a"
+#endif
+
+/* This is the maximum symbol size that won't require malloc/free */
+#undef LT_SYMBOL_LENGTH
+#define LT_SYMBOL_LENGTH 128
+
+/* This accounts for the _LTX_ separator */
+#undef LT_SYMBOL_OVERHEAD
+#define LT_SYMBOL_OVERHEAD 5
+
+/* Various boolean flags can be stored in the flags field of an
+ lt_dlhandle... */
+#define LT_DLIS_RESIDENT(handle) ((handle)->info.is_resident)
+#define LT_DLIS_SYMGLOBAL(handle) ((handle)->info.is_symglobal)
+#define LT_DLIS_SYMLOCAL(handle) ((handle)->info.is_symlocal)
+
+
+static const char objdir[] = LT_OBJDIR;
+static const char archive_ext[] = LT_ARCHIVE_EXT;
+static const char libext[] = LT_LIBEXT;
+#if defined(LT_MODULE_EXT)
+static const char shlib_ext[] = LT_MODULE_EXT;
+#endif
+#if defined(LT_DLSEARCH_PATH)
+static const char sys_dlsearch_path[] = LT_DLSEARCH_PATH;
+#endif
+
+
+
+\f
+/* --- DYNAMIC MODULE LOADING --- */
+
+
+/* The type of a function used at each iteration of foreach_dirinpath(). */
+typedef int foreach_callback_func (char *filename, void *data1,
+ void *data2);
+/* foreachfile_callback itself calls a function of this type: */
+typedef int file_worker_func (const char *filename, void *data);
+
+
+static int foreach_dirinpath (const char *search_path,
+ const char *base_name,
+ foreach_callback_func *func,
+ void *data1, void *data2);
+static int find_file_callback (char *filename, void *data1,
+ void *data2);
+static int find_handle_callback (char *filename, void *data,
+ void *ignored);
+static int foreachfile_callback (char *filename, void *data1,
+ void *data2);
+
+
+static int canonicalize_path (const char *path, char **pcanonical);
+static int argzize_path (const char *path,
+ char **pargz, size_t *pargz_len);
+static FILE *find_file (const char *search_path,
+ const char *base_name, char **pdir);
+static lt_dlhandle *find_handle (const char *search_path,
+ const char *base_name,
+ lt_dlhandle *handle,
+ lt_dladvise advise);
+static int find_module (lt_dlhandle *handle, const char *dir,
+ const char *libdir, const char *dlname,
+ const char *old_name, int installed,
+ lt_dladvise advise);
+static int has_library_ext (const char *filename);
+static int load_deplibs (lt_dlhandle handle, char *deplibs);
+static int trim (char **dest, const char *str);
+static int try_dlopen (lt_dlhandle *handle,
+ const char *filename, const char *ext,
+ lt_dladvise advise);
+static int tryall_dlopen (lt_dlhandle *handle,
+ const char *filename,
+ lt_dladvise padvise,
+ const lt_dlvtable *vtable);
+static int unload_deplibs (lt_dlhandle handle);
+static int lt_argz_insert (char **pargz, size_t *pargz_len,
+ char *before, const char *entry);
+static int lt_argz_insertinorder (char **pargz, size_t *pargz_len,
+ const char *entry);
+static int lt_argz_insertdir (char **pargz, size_t *pargz_len,
+ const char *dirnam, struct dirent *dp);
+static int lt_dlpath_insertdir (char **ppath, char *before,
+ const char *dir);
+static int list_files_by_dir (const char *dirnam,
+ char **pargz, size_t *pargz_len);
+static int file_not_found (void);
+
+#ifdef HAVE_LIBDLLOADER
+static int loader_init_callback (lt_dlhandle handle);
+#endif /* HAVE_LIBDLLOADER */
+
+static int loader_init (lt_get_vtable *vtable_func,
+ lt_user_data data);
+
+static char *user_search_path= 0;
+static lt_dlhandle handles = 0;
+static int initialized = 0;
+
+/* Our memory failure callback sets the error message to be passed back
+ up to the client, so we must be careful to return from mallocation
+ callers if allocation fails (as this callback returns!!). */
+void
+lt__alloc_die_callback (void)
+{
+ LT__SETERROR (NO_MEMORY);
+}
+
+#ifdef HAVE_LIBDLLOADER
+/* This function is called to initialise each preloaded module loader,
+ and hook it into the list of loaders to be used when attempting to
+ dlopen an application module. */
+static int
+loader_init_callback (lt_dlhandle handle)
+{
+ lt_get_vtable *vtable_func = (lt_get_vtable *) lt_dlsym (handle, "get_vtable");
+ return loader_init (vtable_func, 0);
+}
+#endif /* HAVE_LIBDLLOADER */
+
+static int
+loader_init (lt_get_vtable *vtable_func, lt_user_data data)
+{
+ const lt_dlvtable *vtable = 0;
+ int errors = 0;
+
+ if (vtable_func)
+ {
+ vtable = (*vtable_func) (data);
+ }
+
+ /* lt_dlloader_add will LT__SETERROR if it fails. */
+ errors += lt_dlloader_add (vtable);
+
+ assert (errors || vtable);
+
+ if ((!errors) && vtable->dlloader_init)
+ {
+ if ((*vtable->dlloader_init) (vtable->dlloader_data))
+ {
+ LT__SETERROR (INIT_LOADER);
+ ++errors;
+ }
+ }
+
+ return errors;
+}
+
+/* Bootstrap the loader loading with the preopening loader. */
+#define get_vtable preopen_LTX_get_vtable
+#define preloaded_symbols LT_CONC3(lt_, LTDLOPEN, _LTX_preloaded_symbols)
+
+LT_BEGIN_C_DECLS
+LT_SCOPE const lt_dlvtable * get_vtable (lt_user_data data);
+LT_END_C_DECLS
+#ifdef HAVE_LIBDLLOADER
+extern lt_dlsymlist preloaded_symbols;
+#endif
+
+/* Initialize libltdl. */
+int
+lt_dlinit (void)
+{
+ int errors = 0;
+
+ /* Initialize only at first call. */
+ if (++initialized == 1)
+ {
+ lt__alloc_die = lt__alloc_die_callback;
+ handles = 0;
+ user_search_path = 0; /* empty search path */
+
+ /* First set up the statically loaded preload module loader, so
+ we can use it to preopen the other loaders we linked in at
+ compile time. */
+ errors += loader_init (get_vtable, 0);
+
+ /* Now open all the preloaded module loaders, so the application
+ can use _them_ to lt_dlopen its own modules. */
+#ifdef HAVE_LIBDLLOADER
+ if (!errors)
+ {
+ errors += lt_dlpreload (&preloaded_symbols);
+ }
+
+ if (!errors)
+ {
+ errors += lt_dlpreload_open (LT_STR(LTDLOPEN), loader_init_callback);
+ }
+#endif /* HAVE_LIBDLLOADER */
+ }
+
+#ifdef LT_DEBUG_LOADERS
+ lt_dlloader_dump();
+#endif
+
+ return errors;
+}
+
+int
+lt_dlexit (void)
+{
+ /* shut down libltdl */
+ lt_dlloader *loader = 0;
+ lt_dlhandle handle = handles;
+ int errors = 0;
+
+ if (!initialized)
+ {
+ LT__SETERROR (SHUTDOWN);
+ ++errors;
+ goto done;
+ }
+
+ /* shut down only at last call. */
+ if (--initialized == 0)
+ {
+ int level;
+
+ while (handles && LT_DLIS_RESIDENT (handles))
+ {
+ handles = handles->next;
+ }
+
+ /* close all modules */
+ for (level = 1; handle; ++level)
+ {
+ lt_dlhandle cur = handles;
+ int saw_nonresident = 0;
+
+ while (cur)
+ {
+ lt_dlhandle tmp = cur;
+ cur = cur->next;
+ if (!LT_DLIS_RESIDENT (tmp))
+ {
+ saw_nonresident = 1;
+ if (tmp->info.ref_count <= level)
+ {
+ if (lt_dlclose (tmp))
+ {
+ ++errors;
+ }
+ /* Make sure that the handle pointed to by 'cur' still exists.
+ lt_dlclose recursively closes dependent libraries which removes
+ them from the linked list. One of these might be the one
+ pointed to by 'cur'. */
+ if (cur)
+ {
+ for (tmp = handles; tmp; tmp = tmp->next)
+ if (tmp == cur)
+ break;
+ if (! tmp)
+ cur = handles;
+ }
+ }
+ }
+ }
+ /* done if only resident modules are left */
+ if (!saw_nonresident)
+ break;
+ }
+
+ /* When removing loaders, we can only find out failure by testing
+ the error string, so avoid a spurious one from an earlier
+ failed command. */
+ if (!errors)
+ LT__SETERRORSTR (0);
+
+ /* close all loaders */
+ for (loader = (lt_dlloader *) lt_dlloader_next (NULL); loader;)
+ {
+ lt_dlloader *next = (lt_dlloader *) lt_dlloader_next (loader);
+ lt_dlvtable *vtable = (lt_dlvtable *) lt_dlloader_get (loader);
+
+ if ((vtable = lt_dlloader_remove ((char *) vtable->name)))
+ {
+ FREE (vtable);
+ }
+ else
+ {
+ /* ignore errors due to resident modules */
+ const char *err;
+ LT__GETERROR (err);
+ if (err)
+ ++errors;
+ }
+
+ loader = next;
+ }
+
+ FREE(user_search_path);
+ }
+
+ done:
+ return errors;
+}
+
+
+/* Try VTABLE or, if VTABLE is NULL, all available loaders for FILENAME.
+ If the library is not successfully loaded, return non-zero. Otherwise,
+ the dlhandle is stored at the address given in PHANDLE. */
+static int
+tryall_dlopen (lt_dlhandle *phandle, const char *filename,
+ lt_dladvise advise, const lt_dlvtable *vtable)
+{
+ lt_dlhandle handle = handles;
+ const char * saved_error = 0;
+ int errors = 0;
+
+#ifdef LT_DEBUG_LOADERS
+ fprintf (stderr, "tryall_dlopen (%s, %s)\n",
+ filename ? filename : "(null)",
+ vtable ? vtable->name : "(ALL)");
+#endif
+
+ LT__GETERROR (saved_error);
+
+ /* check whether the module was already opened */
+ for (;handle; handle = handle->next)
+ {
+ if ((handle->info.filename == filename) /* dlopen self: 0 == 0 */
+ || (handle->info.filename && filename
+ && streq (handle->info.filename, filename)))
+ {
+ break;
+ }
+ }
+
+ if (handle)
+ {
+ ++handle->info.ref_count;
+ *phandle = handle;
+ goto done;
+ }
+
+ handle = *phandle;
+ if (filename)
+ {
+ /* Comment out the check of file permissions using access.
+ This call seems to always return -1 with error EACCES.
+ */
+ /* We need to catch missing file errors early so that
+ file_not_found() can detect what happened.
+ if (access (filename, R_OK) != 0)
+ {
+ LT__SETERROR (FILE_NOT_FOUND);
+ ++errors;
+ goto done;
+ } */
+
+ handle->info.filename = lt__strdup (filename);
+ if (!handle->info.filename)
+ {
+ ++errors;
+ goto done;
+ }
+ }
+ else
+ {
+ handle->info.filename = 0;
+ }
+
+ {
+ lt_dlloader loader = lt_dlloader_next (0);
+ const lt_dlvtable *loader_vtable;
+
+ do
+ {
+ if (vtable)
+ loader_vtable = vtable;
+ else
+ loader_vtable = lt_dlloader_get (loader);
+
+#ifdef LT_DEBUG_LOADERS
+ fprintf (stderr, "Calling %s->module_open (%s)\n",
+ (loader_vtable && loader_vtable->name) ? loader_vtable->name : "(null)",
+ filename ? filename : "(null)");
+#endif
+ handle->module = (*loader_vtable->module_open) (loader_vtable->dlloader_data,
+ filename, advise);
+#ifdef LT_DEBUG_LOADERS
+ fprintf (stderr, " Result: %s\n",
+ handle->module ? "Success" : "Failed");
+#endif
+
+ if (handle->module != 0)
+ {
+ if (advise)
+ {
+ handle->info.is_resident = advise->is_resident;
+ handle->info.is_symglobal = advise->is_symglobal;
+ handle->info.is_symlocal = advise->is_symlocal;
+ }
+ break;
+ }
+ }
+ while (!vtable && (loader = lt_dlloader_next (loader)));
+
+ /* If VTABLE was given but couldn't open the module, or VTABLE wasn't
+ given but we exhausted all loaders without opening the module, bail
+ out! */
+ if ((vtable && !handle->module)
+ || (!vtable && !loader))
+ {
+ FREE (handle->info.filename);
+ ++errors;
+ goto done;
+ }
+
+ handle->vtable = loader_vtable;
+ }
+
+ LT__SETERRORSTR (saved_error);
+
+ done:
+ return errors;
+}
+
+
+static int
+tryall_dlopen_module (lt_dlhandle *handle, const char *prefix,
+ const char *dirname, const char *dlname,
+ lt_dladvise advise)
+{
+ int error = 0;
+ char *filename = 0;
+ size_t filename_len = 0;
+ size_t dirname_len = LT_STRLEN (dirname);
+
+ assert (handle);
+ assert (dirname);
+ assert (dlname);
+#if defined(LT_DIRSEP_CHAR)
+ /* Only canonicalized names (i.e. with DIRSEP chars already converted)
+ should make it into this function: */
+ assert (strchr (dirname, LT_DIRSEP_CHAR) == 0);
+#endif
+
+ if (dirname_len > 0)
+ if (dirname[dirname_len -1] == '/')
+ --dirname_len;
+ filename_len = dirname_len + 1 + LT_STRLEN (dlname);
+
+ /* Allocate memory, and combine DIRNAME and MODULENAME into it.
+ The PREFIX (if any) is handled below. */
+ filename = MALLOC (char, filename_len + 1);
+ if (!filename)
+ return 1;
+
+ sprintf (filename, "%.*s/%s", (int) dirname_len, dirname, dlname);
+
+ /* Now that we have combined DIRNAME and MODULENAME, if there is
+ also a PREFIX to contend with, simply recurse with the arguments
+ shuffled. Otherwise, attempt to open FILENAME as a module. */
+ if (prefix)
+ {
+ error += tryall_dlopen_module (handle, (const char *) 0,
+ prefix, filename, advise);
+ }
+ else if (tryall_dlopen (handle, filename, advise, 0) != 0)
+ {
+ ++error;
+ }
+
+ FREE (filename);
+ return error;
+}
+
+static int
+find_module (lt_dlhandle *handle, const char *dir, const char *libdir,
+ const char *dlname, const char *old_name, int installed,
+ lt_dladvise advise)
+{
+ /* Try to open the old library first; if it was dlpreopened,
+ we want the preopened version of it, even if a dlopenable
+ module is available. */
+ if (old_name && tryall_dlopen (handle, old_name, advise, 0) == 0)
+ {
+ return 0;
+ }
+
+ /* Try to open the dynamic library. */
+ if (dlname)
+ {
+ /* try to open the installed module */
+ if (installed && libdir)
+ {
+ if (tryall_dlopen_module (handle, (const char *) 0,
+ libdir, dlname, advise) == 0)
+ return 0;
+ }
+
+ /* try to open the not-installed module */
+ if (!installed)
+ {
+ if (tryall_dlopen_module (handle, dir, objdir,
+ dlname, advise) == 0)
+ return 0;
+ }
+
+ /* maybe it was moved to another directory */
+ {
+ if (dir && (tryall_dlopen_module (handle, (const char *) 0,
+ dir, dlname, advise) == 0))
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+
+static int
+canonicalize_path (const char *path, char **pcanonical)
+{
+ char *canonical = 0;
+
+ assert (path && *path);
+ assert (pcanonical);
+
+ canonical = MALLOC (char, 1+ LT_STRLEN (path));
+ if (!canonical)
+ return 1;
+
+ {
+ size_t dest = 0;
+ size_t src;
+ for (src = 0; path[src] != LT_EOS_CHAR; ++src)
+ {
+ /* Path separators are not copied to the beginning or end of
+ the destination, or if another separator would follow
+ immediately. */
+ if (path[src] == LT_PATHSEP_CHAR)
+ {
+ if ((dest == 0)
+ || (path[1+ src] == LT_PATHSEP_CHAR)
+ || (path[1+ src] == LT_EOS_CHAR))
+ continue;
+ }
+
+ /* Anything other than a directory separator is copied verbatim. */
+ if ((path[src] != '/')
+#if defined(LT_DIRSEP_CHAR)
+ && (path[src] != LT_DIRSEP_CHAR)
+#endif
+ )
+ {
+ canonical[dest++] = path[src];
+ }
+ /* Directory separators are converted and copied only if they are
+ not at the end of a path -- i.e. before a path separator or
+ NULL terminator. */
+ else if ((path[1+ src] != LT_PATHSEP_CHAR)
+ && (path[1+ src] != LT_EOS_CHAR)
+#if defined(LT_DIRSEP_CHAR)
+ && (path[1+ src] != LT_DIRSEP_CHAR)
+#endif
+ && (path[1+ src] != '/'))
+ {
+ canonical[dest++] = '/';
+ }
+ }
+
+ /* Add an end-of-string marker at the end. */
+ canonical[dest] = LT_EOS_CHAR;
+ }
+
+ /* Assign new value. */
+ *pcanonical = canonical;
+
+ return 0;
+}
+
+static int
+argzize_path (const char *path, char **pargz, size_t *pargz_len)
+{
+ error_t error;
+
+ assert (path);
+ assert (pargz);
+ assert (pargz_len);
+
+ if ((error = argz_create_sep (path, LT_PATHSEP_CHAR, pargz, pargz_len)))
+ {
+ switch (error)
+ {
+ case ENOMEM:
+ LT__SETERROR (NO_MEMORY);
+ break;
+ default:
+ LT__SETERROR (UNKNOWN);
+ break;
+ }
+
+ return 1;
+ }
+
+ return 0;
+}
+
+/* Repeatedly call FUNC with each LT_PATHSEP_CHAR delimited element
+ of SEARCH_PATH and references to DATA1 and DATA2, until FUNC returns
+ non-zero or all elements are exhausted. If BASE_NAME is non-NULL,
+ it is appended to each SEARCH_PATH element before FUNC is called. */
+static int
+foreach_dirinpath (const char *search_path, const char *base_name,
+ foreach_callback_func *func, void *data1, void *data2)
+{
+ int result = 0;
+ size_t filenamesize = 0;
+ size_t lenbase = LT_STRLEN (base_name);
+ size_t argz_len = 0;
+ char *argz = 0;
+ char *filename = 0;
+ char *canonical = 0;
+
+ if (!search_path || !*search_path)
+ {
+ LT__SETERROR (FILE_NOT_FOUND);
+ goto cleanup;
+ }
+
+ if (canonicalize_path (search_path, &canonical) != 0)
+ goto cleanup;
+
+ if (argzize_path (canonical, &argz, &argz_len) != 0)
+ goto cleanup;
+
+ {
+ char *dir_name = 0;
+ while ((dir_name = argz_next (argz, argz_len, dir_name)))
+ {
+ size_t lendir = LT_STRLEN (dir_name);
+
+ if (1+ lendir + lenbase >= filenamesize)
+ {
+ FREE (filename);
+ filenamesize = 1+ lendir + 1+ lenbase; /* "/d" + '/' + "f" + '\0' */
+ filename = MALLOC (char, filenamesize);
+ if (!filename)
+ goto cleanup;
+ }
+
+ assert (filenamesize > lendir);
+ strcpy (filename, dir_name);
+
+ if (base_name && *base_name)
+ {
+ if (filename[lendir -1] != '/')
+ filename[lendir++] = '/';
+ strcpy (filename +lendir, base_name);
+ }
+
+ if ((result = (*func) (filename, data1, data2)))
+ {
+ break;
+ }
+ }
+ }
+
+ cleanup:
+ FREE (argz);
+ FREE (canonical);
+ FREE (filename);
+
+ return result;
+}
+
+/* If FILEPATH can be opened, store the name of the directory component
+ in DATA1, and the opened FILE* structure address in DATA2. Otherwise
+ DATA1 is unchanged, but DATA2 is set to a pointer to NULL. */
+static int
+find_file_callback (char *filename, void *data1, void *data2)
+{
+ char **pdir = (char **) data1;
+ FILE **pfile = (FILE **) data2;
+ int is_done = 0;
+
+ assert (filename && *filename);
+ assert (pdir);
+ assert (pfile);
+
+ if ((*pfile = fopen (filename, LT_READTEXT_MODE)))
+ {
+ char *dirend = strrchr (filename, '/');
+
+ if (dirend > filename)
+ *dirend = LT_EOS_CHAR;
+
+ FREE (*pdir);
+ *pdir = lt__strdup (filename);
+ is_done = (*pdir == 0) ? -1 : 1;
+ }
+
+ return is_done;
+}
+
+static FILE *
+find_file (const char *search_path, const char *base_name, char **pdir)
+{
+ FILE *file = 0;
+
+ foreach_dirinpath (search_path, base_name, find_file_callback, pdir, &file);
+
+ return file;
+}
+
+static int
+find_handle_callback (char *filename, void *data, void *data2)
+{
+ lt_dlhandle *phandle = (lt_dlhandle *) data;
+ int notfound = access (filename, R_OK);
+ lt_dladvise advise = (lt_dladvise) data2;
+
+ /* Bail out if file cannot be read... */
+ if (notfound)
+ return 0;
+
+ /* Try to dlopen the file, but do not continue searching in any
+ case. */
+ if (tryall_dlopen (phandle, filename, advise, 0) != 0)
+ *phandle = 0;
+
+ return 1;
+}
+
+/* If HANDLE was found return it, otherwise return 0. If HANDLE was
+ found but could not be opened, *HANDLE will be set to 0. */
+static lt_dlhandle *
+find_handle (const char *search_path, const char *base_name,
+ lt_dlhandle *phandle, lt_dladvise advise)
+{
+ if (!search_path)
+ return 0;
+
+ if (!foreach_dirinpath (search_path, base_name, find_handle_callback,
+ phandle, advise))
+ return 0;
+
+ return phandle;
+}
+
+#if !defined(LTDL_DLOPEN_DEPLIBS)
+static int
+load_deplibs (lt_dlhandle handle, char * LT__UNUSED deplibs)
+{
+ handle->depcount = 0;
+ return 0;
+}
+
+#else /* defined(LTDL_DLOPEN_DEPLIBS) */
+static int
+load_deplibs (lt_dlhandle handle, char *deplibs)
+{
+ char *p, *save_search_path = 0;
+ int depcount = 0;
+ int i;
+ char **names = 0;
+ int errors = 0;
+
+ handle->depcount = 0;
+
+ if (!deplibs)
+ {
+ return errors;
+ }
+ ++errors;
+
+ if (user_search_path)
+ {
+ save_search_path = lt__strdup (user_search_path);
+ if (!save_search_path)
+ goto cleanup;
+ }
+
+ /* extract search paths and count deplibs */
+ p = deplibs;
+ while (*p)
+ {
+ if (!isspace ((unsigned char) *p))
+ {
+ char *end = p+1;
+ while (*end && !isspace((unsigned char) *end))
+ {
+ ++end;
+ }
+
+ if (strncmp(p, "-L", 2) == 0 || strncmp(p, "-R", 2) == 0)
+ {
+ char save = *end;
+ *end = 0; /* set a temporary string terminator */
+ if (lt_dladdsearchdir(p+2))
+ {
+ goto cleanup;
+ }
+ *end = save;
+ }
+ else
+ {
+ ++depcount;
+ }
+
+ p = end;
+ }
+ else
+ {
+ ++p;
+ }
+ }
+
+
+ if (!depcount)
+ {
+ errors = 0;
+ goto cleanup;
+ }
+
+ names = MALLOC (char *, depcount);
+ if (!names)
+ goto cleanup;
+
+ /* now only extract the actual deplibs */
+ depcount = 0;
+ p = deplibs;
+ while (*p)
+ {
+ if (isspace ((unsigned char) *p))
+ {
+ ++p;
+ }
+ else
+ {
+ char *end = p+1;
+ while (*end && !isspace ((unsigned char) *end))
+ {
+ ++end;
+ }
+
+ if (strncmp(p, "-L", 2) != 0 && strncmp(p, "-R", 2) != 0)
+ {
+ char *name;
+ char save = *end;
+ *end = 0; /* set a temporary string terminator */
+ if (strncmp(p, "-l", 2) == 0)
+ {
+ size_t name_len = 3+ /* "lib" */ LT_STRLEN (p + 2);
+ name = MALLOC (char, 1+ name_len);
+ if (name)
+ sprintf (name, "lib%s", p+2);
+ }
+ else
+ name = lt__strdup(p);
+
+ if (!name)
+ goto cleanup_names;
+
+ names[depcount++] = name;
+ *end = save;
+ }
+ p = end;
+ }
+ }
+
+ /* load the deplibs (in reverse order)
+ At this stage, don't worry if the deplibs do not load correctly,
+ they may already be statically linked into the loading application
+ for instance. There will be a more enlightening error message
+ later on if the loaded module cannot resolve all of its symbols. */
+ if (depcount)
+ {
+ lt_dlhandle cur = handle;
+ int j = 0;
+
+ cur->deplibs = MALLOC (lt_dlhandle, depcount);
+ if (!cur->deplibs)
+ goto cleanup_names;
+
+ for (i = 0; i < depcount; ++i)
+ {
+ cur->deplibs[j] = lt_dlopenext(names[depcount-1-i]);
+ if (cur->deplibs[j])
+ {
+ ++j;
+ }
+ }
+
+ cur->depcount = j; /* Number of successfully loaded deplibs */
+ errors = 0;
+ }
+
+ cleanup_names:
+ for (i = 0; i < depcount; ++i)
+ {
+ FREE (names[i]);
+ }
+
+ cleanup:
+ FREE (names);
+ /* restore the old search path */
+ if (save_search_path) {
+ MEMREASSIGN (user_search_path, save_search_path);
+ }
+
+ return errors;
+}
+#endif /* defined(LTDL_DLOPEN_DEPLIBS) */
+
+static int
+unload_deplibs (lt_dlhandle handle)
+{
+ int i;
+ int errors = 0;
+ lt_dlhandle cur = handle;
+
+ if (cur->depcount)
+ {
+ for (i = 0; i < cur->depcount; ++i)
+ {
+ if (!LT_DLIS_RESIDENT (cur->deplibs[i]))
+ {
+ errors += lt_dlclose (cur->deplibs[i]);
+ }
+ }
+ FREE (cur->deplibs);
+ }
+
+ return errors;
+}
+
+static int
+trim (char **dest, const char *str)
+{
+ /* remove the leading and trailing "'" from str
+ and store the result in dest */
+ const char *end = strrchr (str, '\'');
+ size_t len = LT_STRLEN (str);
+ char *tmp;
+
+ FREE (*dest);
+
+ if (!end)
+ return 1;
+
+ if (len > 3 && str[0] == '\'')
+ {
+ tmp = MALLOC (char, end - str);
+ if (!tmp)
+ return 1;
+
+ memcpy(tmp, &str[1], (end - str) - 1);
+ tmp[(end - str) - 1] = LT_EOS_CHAR;
+ *dest = tmp;
+ }
+ else
+ {
+ *dest = 0;
+ }
+
+ return 0;
+}
+
+/* Read the .la file FILE. */
+static int
+parse_dotla_file(FILE *file, char **dlname, char **libdir, char **deplibs,
+ char **old_name, int *installed)
+{
+ int errors = 0;
+ size_t line_len = LT_FILENAME_MAX;
+ char * line = MALLOC (char, line_len);
+
+ if (!line)
+ {
+ LT__SETERROR (FILE_NOT_FOUND);
+ return 1;
+ }
+
+ while (!feof (file))
+ {
+ line[line_len-2] = '\0';
+ if (!fgets (line, (int) line_len, file))
+ {
+ break;
+ }
+
+ /* Handle the case where we occasionally need to read a line
+ that is longer than the initial buffer size.
+ Behave even if the file contains NUL bytes due to corruption. */
+ while (line[line_len-2] != '\0' && line[line_len-2] != '\n' && !feof (file))
+ {
+ line = REALLOC (char, line, line_len *2);
+ if (!line)
+ {
+ ++errors;
+ goto cleanup;
+ }
+ line[line_len * 2 - 2] = '\0';
+ if (!fgets (&line[line_len -1], (int) line_len +1, file))
+ {
+ break;
+ }
+ line_len *= 2;
+ }
+
+ if (line[0] == '\n' || line[0] == '#')
+ {
+ continue;
+ }
+
+#undef STR_DLNAME
+#define STR_DLNAME "dlname="
+ if (strncmp (line, STR_DLNAME, sizeof (STR_DLNAME) - 1) == 0)
+ {
+ errors += trim (dlname, &line[sizeof (STR_DLNAME) - 1]);
+ }
+
+#undef STR_OLD_LIBRARY
+#define STR_OLD_LIBRARY "old_library="
+ else if (strncmp (line, STR_OLD_LIBRARY,
+ sizeof (STR_OLD_LIBRARY) - 1) == 0)
+ {
+ errors += trim (old_name, &line[sizeof (STR_OLD_LIBRARY) - 1]);
+ }
+#undef STR_LIBDIR
+#define STR_LIBDIR "libdir="
+ else if (strncmp (line, STR_LIBDIR, sizeof (STR_LIBDIR) - 1) == 0)
+ {
+ errors += trim (libdir, &line[sizeof(STR_LIBDIR) - 1]);
+ }
+
+#undef STR_DL_DEPLIBS
+#define STR_DL_DEPLIBS "dependency_libs="
+ else if (strncmp (line, STR_DL_DEPLIBS,
+ sizeof (STR_DL_DEPLIBS) - 1) == 0)
+ {
+ errors += trim (deplibs, &line[sizeof (STR_DL_DEPLIBS) - 1]);
+ }
+ else if (streq (line, "installed=yes\n"))
+ {
+ *installed = 1;
+ }
+ else if (streq (line, "installed=no\n"))
+ {
+ *installed = 0;
+ }
+
+#undef STR_LIBRARY_NAMES
+#define STR_LIBRARY_NAMES "library_names="
+ else if (!*dlname && strncmp (line, STR_LIBRARY_NAMES,
+ sizeof (STR_LIBRARY_NAMES) - 1) == 0)
+ {
+ char *last_libname;
+ errors += trim (dlname, &line[sizeof (STR_LIBRARY_NAMES) - 1]);
+ if (!errors
+ && *dlname
+ && (last_libname = strrchr (*dlname, ' ')) != 0)
+ {
+ last_libname = lt__strdup (last_libname + 1);
+ if (!last_libname)
+ {
+ ++errors;
+ goto cleanup;
+ }
+ MEMREASSIGN (*dlname, last_libname);
+ }
+ }
+
+ if (errors)
+ break;
+ }
+cleanup:
+ FREE (line);
+ return errors;
+}
+
+
+/* Try to open FILENAME as a module. */
+static int
+try_dlopen (lt_dlhandle *phandle, const char *filename, const char *ext,
+ lt_dladvise advise)
+{
+ const char * saved_error = 0;
+ char * archive_name = 0;
+ char * canonical = 0;
+ char * base_name = 0;
+ char * dir = 0;
+ char * name = 0;
+ char * attempt = 0;
+ int errors = 0;
+ lt_dlhandle newhandle;
+
+ assert (phandle);
+ assert (*phandle == 0);
+
+#ifdef LT_DEBUG_LOADERS
+ fprintf (stderr, "try_dlopen (%s, %s)\n",
+ filename ? filename : "(null)",
+ ext ? ext : "(null)");
+#endif
+
+ LT__GETERROR (saved_error);
+
+ /* dlopen self? */
+ if (!filename)
+ {
+ *phandle = (lt_dlhandle) lt__zalloc (sizeof (struct lt__handle));
+ if (*phandle == 0)
+ return 1;
+
+ newhandle = *phandle;
+
+ /* lt_dlclose()ing yourself is very bad! Disallow it. */
+ newhandle->info.is_resident = 1;
+
+ if (tryall_dlopen (&newhandle, 0, advise, 0) != 0)
+ {
+ FREE (*phandle);
+ return 1;
+ }
+
+ goto register_handle;
+ }
+
+ assert (filename && *filename);
+
+ if (ext)
+ {
+ attempt = MALLOC (char, LT_STRLEN (filename) + LT_STRLEN (ext) + 1);
+ if (!attempt)
+ return 1;
+
+ sprintf(attempt, "%s%s", filename, ext);
+ }
+ else
+ {
+ attempt = lt__strdup (filename);
+ if (!attempt)
+ return 1;
+ }
+
+ /* Doing this immediately allows internal functions to safely
+ assume only canonicalized paths are passed. */
+ if (canonicalize_path (attempt, &canonical) != 0)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ /* If the canonical module name is a path (relative or absolute)
+ then split it into a directory part and a name part. */
+ base_name = strrchr (canonical, '/');
+ if (base_name)
+ {
+ size_t dirlen = (1+ base_name) - canonical;
+
+ dir = MALLOC (char, 1+ dirlen);
+ if (!dir)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ strncpy (dir, canonical, dirlen);
+ dir[dirlen] = LT_EOS_CHAR;
+
+ ++base_name;
+ }
+ else
+ MEMREASSIGN (base_name, canonical);
+
+ assert (base_name && *base_name);
+
+ ext = strrchr (base_name, '.');
+ if (!ext)
+ {
+ ext = base_name + LT_STRLEN (base_name);
+ }
+
+ /* extract the module name from the file name */
+ name = MALLOC (char, ext - base_name + 1);
+ if (!name)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ /* canonicalize the module name */
+ {
+ int i;
+ for (i = 0; i < ext - base_name; ++i)
+ {
+ if (isalnum ((unsigned char)(base_name[i])))
+ {
+ name[i] = base_name[i];
+ }
+ else
+ {
+ name[i] = '_';
+ }
+ }
+ name[ext - base_name] = LT_EOS_CHAR;
+ }
+
+ /* Before trawling through the filesystem in search of a module,
+ check whether we are opening a preloaded module. */
+ if (!dir)
+ {
+ const lt_dlvtable *vtable = lt_dlloader_find ("lt_preopen");
+
+ if (vtable)
+ {
+ /* name + "." + libext + NULL */
+ archive_name = MALLOC (char, LT_STRLEN (name) + LT_STRLEN (libext) + 2);
+ *phandle = (lt_dlhandle) lt__zalloc (sizeof (struct lt__handle));
+
+ if ((*phandle == NULL) || (archive_name == NULL))
+ {
+ ++errors;
+ goto cleanup;
+ }
+ newhandle = *phandle;
+
+ /* Preloaded modules are always named according to their old
+ archive name. */
+ sprintf (archive_name, "%s.%s", name, libext);
+
+ if (tryall_dlopen (&newhandle, archive_name, advise, vtable) == 0)
+ {
+ goto register_handle;
+ }
+
+ /* If we're still here, there was no matching preloaded module,
+ so put things back as we found them, and continue searching. */
+ FREE (*phandle);
+ newhandle = NULL;
+ }
+ }
+
+ /* If we are allowing only preloaded modules, and we didn't find
+ anything yet, give up on the search here. */
+ if (advise && advise->try_preload_only)
+ {
+ goto cleanup;
+ }
+
+ /* Check whether we are opening a libtool module (.la extension). */
+ if (ext && streq (ext, archive_ext))
+ {
+ /* this seems to be a libtool module */
+ FILE * file = 0;
+ char * dlname = 0;
+ char * old_name = 0;
+ char * libdir = 0;
+ char * deplibs = 0;
+
+ /* if we can't find the installed flag, it is probably an
+ installed libtool archive, produced with an old version
+ of libtool */
+ int installed = 1;
+
+ /* Now try to open the .la file. If there is no directory name
+ component, try to find it first in user_search_path and then other
+ prescribed paths. Otherwise (or in any case if the module was not
+ yet found) try opening just the module name as passed. */
+ if (!dir)
+ {
+ const char *search_path = user_search_path;
+
+ if (search_path)
+ file = find_file (user_search_path, base_name, &dir);
+
+ if (!file)
+ {
+ search_path = getenv (LTDL_SEARCHPATH_VAR);
+ if (search_path)
+ file = find_file (search_path, base_name, &dir);
+ }
+
+#if defined(LT_MODULE_PATH_VAR)
+ if (!file)
+ {
+ search_path = getenv (LT_MODULE_PATH_VAR);
+ if (search_path)
+ file = find_file (search_path, base_name, &dir);
+ }
+#endif
+#if defined(LT_DLSEARCH_PATH)
+ if (!file && *sys_dlsearch_path)
+ {
+ file = find_file (sys_dlsearch_path, base_name, &dir);
+ }
+#endif
+ }
+ if (!file)
+ {
+ file = fopen (attempt, LT_READTEXT_MODE);
+ }
+
+ /* If we didn't find the file by now, it really isn't there. Set
+ the status flag, and bail out. */
+ if (!file)
+ {
+ LT__SETERROR (FILE_NOT_FOUND);
+ ++errors;
+ goto cleanup;
+ }
+
+ /* read the .la file */
+ if (parse_dotla_file(file, &dlname, &libdir, &deplibs,
+ &old_name, &installed) != 0)
+ ++errors;
+
+ fclose (file);
+
+ /* allocate the handle */
+ *phandle = (lt_dlhandle) lt__zalloc (sizeof (struct lt__handle));
+ if (*phandle == 0)
+ ++errors;
+
+ if (errors)
+ {
+ FREE (dlname);
+ FREE (old_name);
+ FREE (libdir);
+ FREE (deplibs);
+ FREE (*phandle);
+ goto cleanup;
+ }
+
+ assert (*phandle);
+
+ if (load_deplibs (*phandle, deplibs) == 0)
+ {
+ newhandle = *phandle;
+ /* find_module may replace newhandle */
+ if (find_module (&newhandle, dir, libdir, dlname, old_name,
+ installed, advise))
+ {
+ unload_deplibs (*phandle);
+ ++errors;
+ }
+ }
+ else
+ {
+ ++errors;
+ }
+
+ FREE (dlname);
+ FREE (old_name);
+ FREE (libdir);
+ FREE (deplibs);
+
+ if (errors)
+ {
+ FREE (*phandle);
+ goto cleanup;
+ }
+
+ if (*phandle != newhandle)
+ {
+ unload_deplibs (*phandle);
+ }
+ }
+ else
+ {
+ /* not a libtool module */
+ *phandle = (lt_dlhandle) lt__zalloc (sizeof (struct lt__handle));
+ if (*phandle == 0)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ newhandle = *phandle;
+
+ /* If the module has no directory name component, try to find it
+ first in user_search_path and then other prescribed paths.
+ Otherwise (or in any case if the module was not yet found) try
+ opening just the module name as passed. */
+ if ((dir || (!find_handle (user_search_path, base_name,
+ &newhandle, advise)
+ && !find_handle (getenv (LTDL_SEARCHPATH_VAR), base_name,
+ &newhandle, advise)
+#if defined(LT_MODULE_PATH_VAR)
+ && !find_handle (getenv (LT_MODULE_PATH_VAR), base_name,
+ &newhandle, advise)
+#endif
+#if defined(LT_DLSEARCH_PATH)
+ && !find_handle (sys_dlsearch_path, base_name,
+ &newhandle, advise)
+#endif
+ )))
+ {
+ if (tryall_dlopen (&newhandle, attempt, advise, 0) != 0)
+ {
+ newhandle = NULL;
+ }
+ }
+
+ if (!newhandle)
+ {
+ FREE (*phandle);
+ ++errors;
+ goto cleanup;
+ }
+ }
+
+ register_handle:
+ MEMREASSIGN (*phandle, newhandle);
+
+ if ((*phandle)->info.ref_count == 0)
+ {
+ (*phandle)->info.ref_count = 1;
+ MEMREASSIGN ((*phandle)->info.name, name);
+
+ (*phandle)->next = handles;
+ handles = *phandle;
+ }
+
+ LT__SETERRORSTR (saved_error);
+
+ cleanup:
+ FREE (dir);
+ FREE (attempt);
+ FREE (name);
+ if (!canonical) /* was MEMREASSIGNed */
+ FREE (base_name);
+ FREE (canonical);
+ FREE (archive_name);
+
+ return errors;
+}
+
+
+/* If the last error messge store was `FILE_NOT_FOUND', then return
+ non-zero. */
+static int
+file_not_found (void)
+{
+ const char *error = 0;
+
+ LT__GETERROR (error);
+ if (error == LT__STRERROR (FILE_NOT_FOUND))
+ return 1;
+
+ return 0;
+}
+
+
+/* Unless FILENAME already bears a suitable library extension, then
+ return 0. */
+static int
+has_library_ext (const char *filename)
+{
+ char * ext = 0;
+
+ assert (filename);
+
+ ext = strrchr (filename, '.');
+
+ if (ext && ((streq (ext, archive_ext))
+#if defined(LT_MODULE_EXT)
+ || (streq (ext, shlib_ext))
+#endif
+ ))
+ {
+ return 1;
+ }
+
+ return 0;
+}
+
+
+/* Initialise and configure a user lt_dladvise opaque object. */
+
+int
+lt_dladvise_init (lt_dladvise *padvise)
+{
+ lt_dladvise advise = (lt_dladvise) lt__zalloc (sizeof (struct lt__advise));
+ *padvise = advise;
+ return (advise ? 0 : 1);
+}
+
+int
+lt_dladvise_destroy (lt_dladvise *padvise)
+{
+ if (padvise)
+ FREE(*padvise);
+ return 0;
+}
+
+int
+lt_dladvise_ext (lt_dladvise *padvise)
+{
+ assert (padvise && *padvise);
+ (*padvise)->try_ext = 1;
+ return 0;
+}
+
+int
+lt_dladvise_resident (lt_dladvise *padvise)
+{
+ assert (padvise && *padvise);
+ (*padvise)->is_resident = 1;
+ return 0;
+}
+
+int
+lt_dladvise_local (lt_dladvise *padvise)
+{
+ assert (padvise && *padvise);
+ (*padvise)->is_symlocal = 1;
+ return 0;
+}
+
+int
+lt_dladvise_global (lt_dladvise *padvise)
+{
+ assert (padvise && *padvise);
+ (*padvise)->is_symglobal = 1;
+ return 0;
+}
+
+int
+lt_dladvise_preload (lt_dladvise *padvise)
+{
+ assert (padvise && *padvise);
+ (*padvise)->try_preload_only = 1;
+ return 0;
+}
+
+/* Libtool-1.5.x interface for loading a new module named FILENAME. */
+lt_dlhandle
+lt_dlopen (const char *filename)
+{
+ return lt_dlopenadvise (filename, NULL);
+}
+
+
+/* If FILENAME has an ARCHIVE_EXT or MODULE_EXT extension, try to
+ open the FILENAME as passed. Otherwise try appending ARCHIVE_EXT,
+ and if a file is still not found try again with MODULE_EXT appended
+ instead. */
+lt_dlhandle
+lt_dlopenext (const char *filename)
+{
+ lt_dlhandle handle = 0;
+ lt_dladvise advise;
+
+ if (!lt_dladvise_init (&advise) && !lt_dladvise_ext (&advise))
+ handle = lt_dlopenadvise (filename, advise);
+
+ lt_dladvise_destroy (&advise);
+ return handle;
+}
+
+
+lt_dlhandle
+lt_dlopenadvise (const char *filename, lt_dladvise advise)
+{
+ lt_dlhandle handle = 0;
+ int errors = 0;
+
+ /* Can't have symbols hidden and visible at the same time! */
+ if (advise && advise->is_symlocal && advise->is_symglobal)
+ {
+ LT__SETERROR (CONFLICTING_FLAGS);
+ return 0;
+ }
+
+ if (!filename
+ || !advise
+ || !advise->try_ext
+ || has_library_ext (filename))
+ {
+ /* Just incase we missed a code path in try_dlopen() that reports
+ an error, but forgot to reset handle... */
+ if (try_dlopen (&handle, filename, NULL, advise) != 0)
+ return 0;
+
+ return handle;
+ }
+ else if (filename && *filename)
+ {
+
+ /* First try appending ARCHIVE_EXT. */
+ errors += try_dlopen (&handle, filename, archive_ext, advise);
+
+ /* If we found FILENAME, stop searching -- whether we were able to
+ load the file as a module or not. If the file exists but loading
+ failed, it is better to return an error message here than to
+ report FILE_NOT_FOUND when the alternatives (foo.so etc) are not
+ in the module search path. */
+ if (handle || ((errors > 0) && !file_not_found ()))
+ return handle;
+
+#if defined(LT_MODULE_EXT)
+ /* Try appending SHLIB_EXT. */
+ errors = try_dlopen (&handle, filename, shlib_ext, advise);
+
+ /* As before, if the file was found but loading failed, return now
+ with the current error message. */
+ if (handle || ((errors > 0) && !file_not_found ()))
+ return handle;
+#endif
+ }
+
+ /* Still here? Then we really did fail to locate any of the file
+ names we tried. */
+ LT__SETERROR (FILE_NOT_FOUND);
+ return 0;
+}
+
+
+static int
+lt_argz_insert (char **pargz, size_t *pargz_len, char *before,
+ const char *entry)
+{
+ error_t error;
+
+ /* Prior to Sep 8, 2005, newlib had a bug where argz_insert(pargz,
+ pargz_len, NULL, entry) failed with EINVAL. */
+ if (before)
+ error = argz_insert (pargz, pargz_len, before, entry);
+ else
+ error = argz_append (pargz, pargz_len, entry, 1 + strlen (entry));
+
+ if (error)
+ {
+ switch (error)
+ {
+ case ENOMEM:
+ LT__SETERROR (NO_MEMORY);
+ break;
+ default:
+ LT__SETERROR (UNKNOWN);
+ break;
+ }
+ return 1;
+ }
+
+ return 0;
+}
+
+static int
+lt_argz_insertinorder (char **pargz, size_t *pargz_len, const char *entry)
+{
+ char *before = 0;
+
+ assert (pargz);
+ assert (pargz_len);
+ assert (entry && *entry);
+
+ if (*pargz)
+ while ((before = argz_next (*pargz, *pargz_len, before)))
+ {
+ int cmp = strcmp (entry, before);
+
+ if (cmp < 0) break;
+ if (cmp == 0) return 0; /* No duplicates! */
+ }
+
+ return lt_argz_insert (pargz, pargz_len, before, entry);
+}
+
+static int
+lt_argz_insertdir (char **pargz, size_t *pargz_len, const char *dirnam,
+ struct dirent *dp)
+{
+ char *buf = 0;
+ size_t buf_len = 0;
+ char *end = 0;
+ size_t end_offset = 0;
+ size_t dir_len = 0;
+ int errors = 0;
+
+ assert (pargz);
+ assert (pargz_len);
+ assert (dp);
+
+ dir_len = LT_STRLEN (dirnam);
+ end = dp->d_name + D_NAMLEN(dp);
+
+ /* Ignore version numbers. */
+ {
+ char *p;
+ for (p = end; p -1 > dp->d_name; --p)
+ if (strchr (".0123456789", p[-1]) == 0)
+ break;
+
+ if (*p == '.')
+ end = p;
+ }
+
+ /* Ignore filename extension. */
+ {
+ char *p;
+ for (p = end -1; p > dp->d_name; --p)
+ if (*p == '.')
+ {
+ end = p;
+ break;
+ }
+ }
+
+ /* Prepend the directory name. */
+ end_offset = end - dp->d_name;
+ buf_len = dir_len + 1+ end_offset;
+ buf = MALLOC (char, 1+ buf_len);
+ if (!buf)
+ return ++errors;
+
+ assert (buf);
+
+ strcpy (buf, dirnam);
+ strcat (buf, "/");
+ strncat (buf, dp->d_name, end_offset);
+ buf[buf_len] = LT_EOS_CHAR;
+
+ /* Try to insert (in order) into ARGZ/ARGZ_LEN. */
+ if (lt_argz_insertinorder (pargz, pargz_len, buf) != 0)
+ ++errors;
+
+ FREE (buf);
+
+ return errors;
+}
+
+static int
+list_files_by_dir (const char *dirnam, char **pargz, size_t *pargz_len)
+{
+ DIR *dirp = 0;
+ int errors = 0;
+
+ assert (dirnam && *dirnam);
+ assert (pargz);
+ assert (pargz_len);
+ assert (dirnam[LT_STRLEN(dirnam) -1] != '/');
+
+ dirp = opendir (dirnam);
+ if (dirp)
+ {
+ struct dirent *dp = 0;
+
+ while ((dp = readdir (dirp)))
+ if (dp->d_name[0] != '.')
+ if (lt_argz_insertdir (pargz, pargz_len, dirnam, dp))
+ {
+ ++errors;
+ break;
+ }
+
+ closedir (dirp);
+ }
+ else
+ ++errors;
+
+ return errors;
+}
+
+
+/* If there are any files in DIRNAME, call the function passed in
+ DATA1 (with the name of each file and DATA2 as arguments). */
+static int
+foreachfile_callback (char *dirname, void *data1, void *data2)
+{
+ file_worker_func *func = *(file_worker_func **) data1;
+
+ int is_done = 0;
+ char *argz = 0;
+ size_t argz_len = 0;
+
+ if (list_files_by_dir (dirname, &argz, &argz_len) != 0)
+ goto cleanup;
+ if (!argz)
+ goto cleanup;
+
+ {
+ char *filename = 0;
+ while ((filename = argz_next (argz, argz_len, filename)))
+ if ((is_done = (*func) (filename, data2)))
+ break;
+ }
+
+ cleanup:
+ FREE (argz);
+
+ return is_done;
+}
+
+
+/* Call FUNC for each unique extensionless file in SEARCH_PATH, along
+ with DATA. The filenames passed to FUNC would be suitable for
+ passing to lt_dlopenext. The extensions are stripped so that
+ individual modules do not generate several entries (e.g. libfoo.la,
+ libfoo.so, libfoo.so.1, libfoo.so.1.0.0). If SEARCH_PATH is NULL,
+ then the same directories that lt_dlopen would search are examined. */
+int
+lt_dlforeachfile (const char *search_path,
+ int (*func) (const char *filename, void *data),
+ void *data)
+{
+ int is_done = 0;
+ file_worker_func **fpptr = &func;
+
+ if (search_path)
+ {
+ /* If a specific path was passed, search only the directories
+ listed in it. */
+ is_done = foreach_dirinpath (search_path, 0,
+ foreachfile_callback, fpptr, data);
+ }
+ else
+ {
+ /* Otherwise search the default paths. */
+ is_done = foreach_dirinpath (user_search_path, 0,
+ foreachfile_callback, fpptr, data);
+ if (!is_done)
+ {
+ is_done = foreach_dirinpath (getenv(LTDL_SEARCHPATH_VAR), 0,
+ foreachfile_callback, fpptr, data);
+ }
+
+#if defined(LT_MODULE_PATH_VAR)
+ if (!is_done)
+ {
+ is_done = foreach_dirinpath (getenv(LT_MODULE_PATH_VAR), 0,
+ foreachfile_callback, fpptr, data);
+ }
+#endif
+#if defined(LT_DLSEARCH_PATH)
+ if (!is_done && *sys_dlsearch_path)
+ {
+ is_done = foreach_dirinpath (sys_dlsearch_path, 0,
+ foreachfile_callback, fpptr, data);
+ }
+#endif
+ }
+
+ return is_done;
+}
+
+int
+lt_dlclose (lt_dlhandle handle)
+{
+ lt_dlhandle cur, last;
+ int errors = 0;
+
+ /* check whether the handle is valid */
+ last = cur = handles;
+ while (cur && handle != cur)
+ {
+ last = cur;
+ cur = cur->next;
+ }
+
+ if (!cur)
+ {
+ LT__SETERROR (INVALID_HANDLE);
+ ++errors;
+ goto done;
+ }
+
+ cur = handle;
+ cur->info.ref_count--;
+
+ /* Note that even with resident modules, we must track the ref_count
+ correctly incase the user decides to reset the residency flag
+ later (even though the API makes no provision for that at the
+ moment). */
+ if (cur->info.ref_count <= 0 && !LT_DLIS_RESIDENT (cur))
+ {
+ lt_user_data data = cur->vtable->dlloader_data;
+
+ if (cur != handles)
+ {
+ last->next = cur->next;
+ }
+ else
+ {
+ handles = cur->next;
+ }
+
+ errors += cur->vtable->module_close (data, cur->module);
+ errors += unload_deplibs (handle);
+
+ /* It is up to the callers to free the data itself. */
+ FREE (cur->interface_data);
+
+ FREE (cur->info.filename);
+ FREE (cur->info.name);
+ FREE (cur);
+
+ goto done;
+ }
+
+ if (LT_DLIS_RESIDENT (handle))
+ {
+ LT__SETERROR (CLOSE_RESIDENT_MODULE);
+ ++errors;
+ }
+
+ done:
+ return errors;
+}
+
+void *
+lt_dlsym (lt_dlhandle place, const char *symbol)
+{
+ size_t lensym;
+ char lsym[LT_SYMBOL_LENGTH];
+ char *sym;
+ void *address;
+ lt_user_data data;
+ lt_dlhandle handle;
+
+ if (!place)
+ {
+ LT__SETERROR (INVALID_HANDLE);
+ return 0;
+ }
+
+ handle = place;
+
+ if (!symbol)
+ {
+ LT__SETERROR (SYMBOL_NOT_FOUND);
+ return 0;
+ }
+
+ lensym = LT_STRLEN (symbol) + LT_STRLEN (handle->vtable->sym_prefix)
+ + LT_STRLEN (handle->info.name);
+
+ if (lensym + LT_SYMBOL_OVERHEAD < LT_SYMBOL_LENGTH)
+ {
+ sym = lsym;
+ }
+ else
+ {
+ sym = MALLOC (char, lensym + LT_SYMBOL_OVERHEAD + 1);
+ if (!sym)
+ {
+ LT__SETERROR (BUFFER_OVERFLOW);
+ return 0;
+ }
+ }
+
+ data = handle->vtable->dlloader_data;
+ if (handle->info.name)
+ {
+ const char *saved_error;
+
+ LT__GETERROR (saved_error);
+
+ /* this is a libtool module */
+ if (handle->vtable->sym_prefix)
+ {
+ strcpy(sym, handle->vtable->sym_prefix);
+ strcat(sym, handle->info.name);
+ }
+ else
+ {
+ strcpy(sym, handle->info.name);
+ }
+
+ strcat(sym, "_LTX_");
+ strcat(sym, symbol);
+
+ /* try "modulename_LTX_symbol" */
+ address = handle->vtable->find_sym (data, handle->module, sym);
+ if (address)
+ {
+ if (sym != lsym)
+ {
+ FREE (sym);
+ }
+ return address;
+ }
+ LT__SETERRORSTR (saved_error);
+ }
+
+ /* otherwise try "symbol" */
+ if (handle->vtable->sym_prefix)
+ {
+ strcpy(sym, handle->vtable->sym_prefix);
+ strcat(sym, symbol);
+ }
+ else
+ {
+ strcpy(sym, symbol);
+ }
+
+ address = handle->vtable->find_sym (data, handle->module, sym);
+ if (sym != lsym)
+ {
+ FREE (sym);
+ }
+
+ return address;
+}
+
+const char *
+lt_dlerror (void)
+{
+ const char *error;
+
+ LT__GETERROR (error);
+ LT__SETERRORSTR (0);
+
+ return error ? error : NULL;
+}
+
+static int
+lt_dlpath_insertdir (char **ppath, char *before, const char *dir)
+{
+ int errors = 0;
+ char *canonical = 0;
+ char *argz = 0;
+ size_t argz_len = 0;
+
+ assert (ppath);
+ assert (dir && *dir);
+
+ if (canonicalize_path (dir, &canonical) != 0)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ assert (canonical && *canonical);
+
+ /* If *PPATH is empty, set it to DIR. */
+ if (*ppath == 0)
+ {
+ assert (!before); /* BEFORE cannot be set without PPATH. */
+ assert (dir); /* Without DIR, don't call this function! */
+
+ *ppath = lt__strdup (dir);
+ if (*ppath == 0)
+ ++errors;
+
+ goto cleanup;
+ }
+
+ assert (ppath && *ppath);
+
+ if (argzize_path (*ppath, &argz, &argz_len) != 0)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ /* Convert BEFORE into an equivalent offset into ARGZ. This only works
+ if *PPATH is already canonicalized, and hence does not change length
+ with respect to ARGZ. We canonicalize each entry as it is added to
+ the search path, and don't call this function with (uncanonicalized)
+ user paths, so this is a fair assumption. */
+ if (before)
+ {
+ assert (*ppath <= before);
+ assert ((int) (before - *ppath) <= (int) strlen (*ppath));
+
+ before = before - *ppath + argz;
+ }
+
+ if (lt_argz_insert (&argz, &argz_len, before, dir) != 0)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ argz_stringify (argz, argz_len, LT_PATHSEP_CHAR);
+ MEMREASSIGN(*ppath, argz);
+
+ cleanup:
+ FREE (argz);
+ FREE (canonical);
+
+ return errors;
+}
+
+int
+lt_dladdsearchdir (const char *search_dir)
+{
+ int errors = 0;
+
+ if (search_dir && *search_dir)
+ {
+ if (lt_dlpath_insertdir (&user_search_path, 0, search_dir) != 0)
+ ++errors;
+ }
+
+ return errors;
+}
+
+int
+lt_dlinsertsearchdir (const char *before, const char *search_dir)
+{
+ int errors = 0;
+
+ if (before)
+ {
+ if ((before < user_search_path)
+ || (before >= user_search_path + LT_STRLEN (user_search_path)))
+ {
+ LT__SETERROR (INVALID_POSITION);
+ return 1;
+ }
+ }
+
+ if (search_dir && *search_dir)
+ {
+ if (lt_dlpath_insertdir (&user_search_path,
+ (char *) before, search_dir) != 0)
+ {
+ ++errors;
+ }
+ }
+
+ return errors;
+}
+
+int
+lt_dlsetsearchpath (const char *search_path)
+{
+ int errors = 0;
+
+ FREE (user_search_path);
+
+ if (!search_path || !LT_STRLEN (search_path))
+ {
+ return errors;
+ }
+
+ if (canonicalize_path (search_path, &user_search_path) != 0)
+ ++errors;
+
+ return errors;
+}
+
+const char *
+lt_dlgetsearchpath (void)
+{
+ const char *saved_path;
+
+ saved_path = user_search_path;
+
+ return saved_path;
+}
+
+int
+lt_dlmakeresident (lt_dlhandle handle)
+{
+ int errors = 0;
+
+ if (!handle)
+ {
+ LT__SETERROR (INVALID_HANDLE);
+ ++errors;
+ }
+ else
+ {
+ handle->info.is_resident = 1;
+ }
+
+ return errors;
+}
+
+int
+lt_dlisresident (lt_dlhandle handle)
+{
+ if (!handle)
+ {
+ LT__SETERROR (INVALID_HANDLE);
+ return -1;
+ }
+
+ return LT_DLIS_RESIDENT (handle);
+}
+
+
+
+/* --- MODULE INFORMATION --- */
+
+typedef struct {
+ const char *id_string;
+ lt_dlhandle_interface *iface;
+} lt__interface_id;
+
+lt_dlinterface_id
+lt_dlinterface_register (const char *id_string, lt_dlhandle_interface *iface)
+{
+ lt__interface_id *interface_id = (lt__interface_id *) lt__malloc (sizeof *interface_id);
+
+ /* If lt__malloc fails, it will LT__SETERROR (NO_MEMORY), which
+ can then be detected with lt_dlerror() if we return 0. */
+ if (interface_id)
+ {
+ interface_id->id_string = lt__strdup (id_string);
+ if (!interface_id->id_string)
+ FREE (interface_id);
+ else
+ interface_id->iface = iface;
+ }
+
+ return (lt_dlinterface_id) interface_id;
+}
+
+void lt_dlinterface_free (lt_dlinterface_id key)
+{
+ lt__interface_id *interface_id = (lt__interface_id *)key;
+ FREE (interface_id->id_string);
+ FREE (interface_id);
+}
+
+void *
+lt_dlcaller_set_data (lt_dlinterface_id key, lt_dlhandle handle, void *data)
+{
+ int n_elements = 0;
+ void *stale = (void *) 0;
+ lt_dlhandle cur = handle;
+ int i;
+
+ if (cur->interface_data)
+ while (cur->interface_data[n_elements].key)
+ ++n_elements;
+
+ for (i = 0; i < n_elements; ++i)
+ {
+ if (cur->interface_data[i].key == key)
+ {
+ stale = cur->interface_data[i].data;
+ break;
+ }
+ }
+
+ /* Ensure that there is enough room in this handle's interface_data
+ array to accept a new element (and an empty end marker). */
+ if (i == n_elements)
+ {
+ lt_interface_data *temp
+ = REALLOC (lt_interface_data, cur->interface_data, 2+ n_elements);
+
+ if (!temp)
+ {
+ stale = 0;
+ goto done;
+ }
+
+ cur->interface_data = temp;
+
+ /* We only need this if we needed to allocate a new interface_data. */
+ cur->interface_data[i].key = key;
+ cur->interface_data[1+ i].key = 0;
+ }
+
+ cur->interface_data[i].data = data;
+
+ done:
+ return stale;
+}
+
+void *
+lt_dlcaller_get_data (lt_dlinterface_id key, lt_dlhandle handle)
+{
+ void *result = (void *) 0;
+ lt_dlhandle cur = handle;
+
+ /* Locate the index of the element with a matching KEY. */
+ if (cur->interface_data)
+ {
+ int i;
+ for (i = 0; cur->interface_data[i].key; ++i)
+ {
+ if (cur->interface_data[i].key == key)
+ {
+ result = cur->interface_data[i].data;
+ break;
+ }
+ }
+ }
+
+ return result;
+}
+
+const lt_dlinfo *
+lt_dlgetinfo (lt_dlhandle handle)
+{
+ if (!handle)
+ {
+ LT__SETERROR (INVALID_HANDLE);
+ return 0;
+ }
+
+ return &(handle->info);
+}
+
+
+lt_dlhandle
+lt_dlhandle_iterate (lt_dlinterface_id iface, lt_dlhandle place)
+{
+ lt_dlhandle handle = place;
+ lt__interface_id *iterator = (lt__interface_id *) iface;
+
+ assert (iface); /* iface is a required argument */
+
+ if (!handle)
+ handle = handles;
+ else
+ handle = handle->next;
+
+ /* advance while the interface check fails */
+ while (handle && iterator->iface
+ && ((*iterator->iface) (handle, iterator->id_string) != 0))
+ {
+ handle = handle->next;
+ }
+
+ return handle;
+}
+
+
+lt_dlhandle
+lt_dlhandle_fetch (lt_dlinterface_id iface, const char *module_name)
+{
+ lt_dlhandle handle = 0;
+
+ assert (iface); /* iface is a required argument */
+
+ while ((handle = lt_dlhandle_iterate (iface, handle)))
+ {
+ lt_dlhandle cur = handle;
+ if (cur && cur->info.name && streq (cur->info.name, module_name))
+ break;
+ }
+
+ return handle;
+}
+
+
+int
+lt_dlhandle_map (lt_dlinterface_id iface,
+ int (*func) (lt_dlhandle handle, void *data), void *data)
+{
+ lt__interface_id *iterator = (lt__interface_id *) iface;
+ lt_dlhandle cur = handles;
+
+ assert (iface); /* iface is a required argument */
+
+ while (cur)
+ {
+ int errorcode = 0;
+
+ /* advance while the interface check fails */
+ while (cur && iterator->iface
+ && ((*iterator->iface) (cur, iterator->id_string) != 0))
+ {
+ cur = cur->next;
+ }
+
+ if ((errorcode = (*func) (cur, data)) != 0)
+ return errorcode;
+ }
+
+ return 0;
+}
HCoop / hcoop / debian / courier-authlib.git / blobdiff