-/* Utility and Unix shadow routines for GNU Emacs on Windows NT.
+/* Utility and Unix shadow routines for GNU Emacs on the Microsoft W32 API.
Copyright (C) 1994, 1995 Free Software Foundation, Inc.
This file is part of GNU Emacs.
*/
+#include <stddef.h> /* for offsetof */
#include <stdlib.h>
#include <stdio.h>
#include <io.h>
#include <fcntl.h>
#include <ctype.h>
#include <signal.h>
+#include <sys/file.h>
#include <sys/time.h>
+#include <sys/utime.h>
/* must include CRT headers *before* config.h */
#include "config.h"
#undef read
#undef write
-#define getwd _getwd
+#undef strerror
+
#include "lisp.h"
-#undef getwd
#include <pwd.h>
#undef gethostname
#undef gethostbyname
#undef getservbyname
+#undef shutdown
#endif
-#include "nt.h"
+#include "w32.h"
#include "ndir.h"
-#include "ntheap.h"
+#include "w32heap.h"
+
+#undef min
+#undef max
+#define min(x, y) (((x) < (y)) ? (x) : (y))
+#define max(x, y) (((x) > (y)) ? (x) : (y))
+
+extern Lisp_Object Vw32_downcase_file_names;
+extern Lisp_Object Vw32_generate_fake_inodes;
+extern Lisp_Object Vw32_get_true_file_attributes;
+extern Lisp_Object Vw32_num_mouse_buttons;
+
+static char startup_dir[MAXPATHLEN];
/* Get the current working directory. */
char *
getwd (char *dir)
{
+#if 0
if (GetCurrentDirectory (MAXPATHLEN, dir) > 0)
return dir;
return NULL;
+#else
+ /* Emacs doesn't actually change directory itself, and we want to
+ force our real wd to be where emacs.exe is to avoid unnecessary
+ conflicts when trying to rename or delete directories. */
+ strcpy (dir, startup_dir);
+ return dir;
+#endif
}
#ifndef HAVE_SOCKETS
return i;
}
-/* Emulate the Unix directory procedures opendir, closedir,
- and readdir. We can't use the procedures supplied in sysdep.c,
- so we provide them here. */
-
-struct direct dir_static; /* simulated directory contents */
-static HANDLE dir_find_handle = INVALID_HANDLE_VALUE;
-static int dir_is_fat;
-static char dir_pathname[MAXPATHLEN+1];
-
-DIR *
-opendir (char *filename)
-{
- DIR *dirp;
-
- /* Opening is done by FindFirstFile. However, a read is inherent to
- this operation, so we defer the open until read time. */
-
- if (!(dirp = (DIR *) malloc (sizeof (DIR))))
- return NULL;
- if (dir_find_handle != INVALID_HANDLE_VALUE)
- return NULL;
-
- dirp->dd_fd = 0;
- dirp->dd_loc = 0;
- dirp->dd_size = 0;
-
- strncpy (dir_pathname, filename, MAXPATHLEN);
- dir_pathname[MAXPATHLEN] = '\0';
- dir_is_fat = is_fat_volume (filename, NULL);
-
- return dirp;
-}
-
-void
-closedir (DIR *dirp)
-{
- /* If we have a find-handle open, close it. */
- if (dir_find_handle != INVALID_HANDLE_VALUE)
- {
- FindClose (dir_find_handle);
- dir_find_handle = INVALID_HANDLE_VALUE;
- }
- xfree ((char *) dirp);
-}
-
-struct direct *
-readdir (DIR *dirp)
-{
- WIN32_FIND_DATA find_data;
-
- /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */
- if (dir_find_handle == INVALID_HANDLE_VALUE)
- {
- char filename[MAXNAMLEN + 3];
- int ln;
-
- strcpy (filename, dir_pathname);
- ln = strlen (filename) - 1;
- if (!IS_DIRECTORY_SEP (filename[ln]))
- strcat (filename, "\\");
- strcat (filename, "*");
-
- dir_find_handle = FindFirstFile (filename, &find_data);
-
- if (dir_find_handle == INVALID_HANDLE_VALUE)
- return NULL;
- }
- else
- {
- if (!FindNextFile (dir_find_handle, &find_data))
- return NULL;
- }
-
- /* Emacs never uses this value, so don't bother making it match
- value returned by stat(). */
- dir_static.d_ino = 1;
-
- dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 +
- dir_static.d_namlen - dir_static.d_namlen % 4;
-
- dir_static.d_namlen = strlen (find_data.cFileName);
- strcpy (dir_static.d_name, find_data.cFileName);
- if (dir_is_fat)
- _strlwr (dir_static.d_name);
-
- return &dir_static;
-}
-
/* Emulate getpwuid, getpwnam and others. */
#define PASSWD_FIELD_SIZE 256
if (getenv ("HOME") == NULL)
putenv ("HOME=c:/");
if (getenv ("SHELL") == NULL)
- putenv ((GetVersion () & 0x80000000) ? "SHELL=command" : "SHELL=cmd");
+ putenv (os_subtype == OS_WIN95 ? "SHELL=command" : "SHELL=cmd");
/* Set dir and shell from environment variables. */
strcpy (the_passwd.pw_dir, getenv ("HOME"));
srand (seed);
}
+
+/* Normalize filename by converting all path separators to
+ the specified separator. Also conditionally convert upper
+ case path name components to lower case. */
+
+static void
+normalize_filename (fp, path_sep)
+ register char *fp;
+ char path_sep;
+{
+ char sep;
+ char *elem;
+
+ /* Always lower-case drive letters a-z, even if the filesystem
+ preserves case in filenames.
+ This is so filenames can be compared by string comparison
+ functions that are case-sensitive. Even case-preserving filesystems
+ do not distinguish case in drive letters. */
+ if (fp[1] == ':' && *fp >= 'A' && *fp <= 'Z')
+ {
+ *fp += 'a' - 'A';
+ fp += 2;
+ }
+
+ if (NILP (Vw32_downcase_file_names))
+ {
+ while (*fp)
+ {
+ if (*fp == '/' || *fp == '\\')
+ *fp = path_sep;
+ fp++;
+ }
+ return;
+ }
+
+ sep = path_sep; /* convert to this path separator */
+ elem = fp; /* start of current path element */
+
+ do {
+ if (*fp >= 'a' && *fp <= 'z')
+ elem = 0; /* don't convert this element */
+
+ if (*fp == 0 || *fp == ':')
+ {
+ sep = *fp; /* restore current separator (or 0) */
+ *fp = '/'; /* after conversion of this element */
+ }
+
+ if (*fp == '/' || *fp == '\\')
+ {
+ if (elem && elem != fp)
+ {
+ *fp = 0; /* temporary end of string */
+ _strlwr (elem); /* while we convert to lower case */
+ }
+ *fp = sep; /* convert (or restore) path separator */
+ elem = fp + 1; /* next element starts after separator */
+ sep = path_sep;
+ }
+ } while (*fp++);
+}
+
/* Destructively turn backslashes into slashes. */
void
dostounix_filename (p)
register char *p;
{
- while (*p)
- {
- if (*p == '\\')
- *p = '/';
- p++;
- }
+ normalize_filename (p, '/');
}
/* Destructively turn slashes into backslashes. */
unixtodos_filename (p)
register char *p;
{
- while (*p)
- {
- if (*p == '/')
- *p = '\\';
- p++;
- }
+ normalize_filename (p, '\\');
}
/* Remove all CR's that are followed by a LF.
return np - startp;
}
+/* Parse the root part of file name, if present. Return length and
+ optionally store pointer to char after root. */
+static int
+parse_root (char * name, char ** pPath)
+{
+ char * start = name;
+
+ if (name == NULL)
+ return 0;
+
+ /* find the root name of the volume if given */
+ if (isalpha (name[0]) && name[1] == ':')
+ {
+ /* skip past drive specifier */
+ name += 2;
+ if (IS_DIRECTORY_SEP (name[0]))
+ name++;
+ }
+ else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
+ {
+ int slashes = 2;
+ name += 2;
+ do
+ {
+ if (IS_DIRECTORY_SEP (*name) && --slashes == 0)
+ break;
+ name++;
+ }
+ while ( *name );
+ if (IS_DIRECTORY_SEP (name[0]))
+ name++;
+ }
+
+ if (pPath)
+ *pPath = name;
+
+ return name - start;
+}
+
+/* Get long base name for name; name is assumed to be absolute. */
+static int
+get_long_basename (char * name, char * buf, int size)
+{
+ WIN32_FIND_DATA find_data;
+ HANDLE dir_handle;
+ int len = 0;
+
+ /* must be valid filename, no wild cards or other invalid characters */
+ if (strpbrk (name, "*?|<>\""))
+ return 0;
+
+ dir_handle = FindFirstFile (name, &find_data);
+ if (dir_handle != INVALID_HANDLE_VALUE)
+ {
+ if ((len = strlen (find_data.cFileName)) < size)
+ memcpy (buf, find_data.cFileName, len + 1);
+ else
+ len = 0;
+ FindClose (dir_handle);
+ }
+ return len;
+}
+
+/* Get long name for file, if possible (assumed to be absolute). */
+BOOL
+w32_get_long_filename (char * name, char * buf, int size)
+{
+ char * o = buf;
+ char * p;
+ char * q;
+ char full[ MAX_PATH ];
+ int len;
+
+ len = strlen (name);
+ if (len >= MAX_PATH)
+ return FALSE;
+
+ /* Use local copy for destructive modification. */
+ memcpy (full, name, len+1);
+ unixtodos_filename (full);
+
+ /* Copy root part verbatim. */
+ len = parse_root (full, &p);
+ memcpy (o, full, len);
+ o += len;
+ *o = '\0';
+ size -= len;
+
+ while (p != NULL && *p)
+ {
+ q = p;
+ p = strchr (q, '\\');
+ if (p) *p = '\0';
+ len = get_long_basename (full, o, size);
+ if (len > 0)
+ {
+ o += len;
+ size -= len;
+ if (p != NULL)
+ {
+ *p++ = '\\';
+ if (size < 2)
+ return FALSE;
+ *o++ = '\\';
+ size--;
+ *o = '\0';
+ }
+ }
+ else
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+int
+is_unc_volume (const char *filename)
+{
+ const char *ptr = filename;
+
+ if (!IS_DIRECTORY_SEP (ptr[0]) || !IS_DIRECTORY_SEP (ptr[1]) || !ptr[2])
+ return 0;
+
+ if (strpbrk (ptr + 2, "*?|<>\"\\/"))
+ return 0;
+
+ return 1;
+}
+
/* Routines that are no-ops on NT but are defined to get Emacs to compile. */
int
return 0;
}
+int
+sigmask (int sig)
+{
+ return 0;
+}
+
int
sigblock (int sig)
{
return 0;
}
+int
+sigunblock (int sig)
+{
+ return 0;
+}
+
int
setpgrp (int pid, int gid)
{
return 0;
}
-int
+void
unrequest_sigio (void)
{
- return 0;
+ return;
}
-int
+void
request_sigio (void)
{
- return 0;
+ return;
}
#define REG_ROOT "SOFTWARE\\GNU\\Emacs"
LPBYTE
-nt_get_resource (key, lpdwtype)
+w32_get_resource (key, lpdwtype)
char *key;
LPDWORD lpdwtype;
{
{
lpvalue = NULL;
- if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS &&
- (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL &&
- RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS)
+ if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS
+ && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL
+ && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS)
{
return (lpvalue);
}
return (NULL);
}
+char *get_emacs_configuration (void);
+extern Lisp_Object Vsystem_configuration;
+
void
-init_environment ()
+init_environment (char ** argv)
{
+ int len;
+ static const char * const tempdirs[] = {
+ "$TMPDIR", "$TEMP", "$TMP", "c:/"
+ };
+ int i;
+ const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]);
+
+ /* Make sure they have a usable $TMPDIR. Many Emacs functions use
+ temporary files and assume "/tmp" if $TMPDIR is unset, which
+ will break on DOS/Windows. Refuse to work if we cannot find
+ a directory, not even "c:/", usable for that purpose. */
+ for (i = 0; i < imax ; i++)
+ {
+ const char *tmp = tempdirs[i];
+
+ if (*tmp == '$')
+ tmp = getenv (tmp + 1);
+ /* Note that `access' can lie to us if the directory resides on a
+ read-only filesystem, like CD-ROM or a write-protected floppy.
+ The only way to be really sure is to actually create a file and
+ see if it succeeds. But I think that's too much to ask. */
+ if (tmp && access (tmp, D_OK) == 0)
+ {
+ char * var = alloca (strlen (tmp) + 8);
+ sprintf (var, "TMPDIR=%s", tmp);
+ putenv (var);
+ break;
+ }
+ }
+ if (i >= imax)
+ cmd_error_internal
+ (Fcons (Qerror,
+ Fcons (build_string ("no usable temporary directories found!!"),
+ Qnil)),
+ "While setting TMPDIR: ");
+
/* Check for environment variables and use registry if they don't exist */
{
int i;
static char * env_vars[] =
{
"HOME",
+ "PRELOAD_WINSOCK",
"emacs_dir",
"EMACSLOADPATH",
"SHELL",
+ "CMDPROXY",
"EMACSDATA",
"EMACSPATH",
"EMACSLOCKDIR",
- "INFOPATH",
+ /* We no longer set INFOPATH because Info-default-directory-list
+ is then ignored. We use a hook in winnt.el instead. */
+ /* "INFOPATH", */
"EMACSDOC",
"TERM",
};
for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++)
{
- if (!getenv (env_vars[i]) &&
- (lpval = nt_get_resource (env_vars[i], &dwType)) != NULL)
+ if (!getenv (env_vars[i])
+ && (lpval = w32_get_resource (env_vars[i], &dwType)) != NULL)
{
if (dwType == REG_EXPAND_SZ)
{
}
}
+ /* Rebuild system configuration to reflect invoking system. */
+ Vsystem_configuration = build_string (EMACS_CONFIGURATION);
+
+ /* Another special case: on NT, the PATH variable is actually named
+ "Path" although cmd.exe (perhaps NT itself) arranges for
+ environment variable lookup and setting to be case insensitive.
+ However, Emacs assumes a fully case sensitive environment, so we
+ need to change "Path" to "PATH" to match the expectations of
+ various elisp packages. We do this by the sneaky method of
+ modifying the string in the C runtime environ entry.
+
+ The same applies to COMSPEC. */
+ {
+ char ** envp;
+
+ for (envp = environ; *envp; envp++)
+ if (_strnicmp (*envp, "PATH=", 5) == 0)
+ memcpy (*envp, "PATH=", 5);
+ else if (_strnicmp (*envp, "COMSPEC=", 8) == 0)
+ memcpy (*envp, "COMSPEC=", 8);
+ }
+
+ /* Remember the initial working directory for getwd, then make the
+ real wd be the location of emacs.exe to avoid conflicts when
+ renaming or deleting directories. (We also don't call chdir when
+ running subprocesses for the same reason.) */
+ if (!GetCurrentDirectory (MAXPATHLEN, startup_dir))
+ abort ();
+
+ {
+ char *p;
+ static char modname[MAX_PATH];
+
+ if (!GetModuleFileName (NULL, modname, MAX_PATH))
+ abort ();
+ if ((p = strrchr (modname, '\\')) == NULL)
+ abort ();
+ *p = 0;
+
+ SetCurrentDirectory (modname);
+
+ /* Ensure argv[0] has the full path to Emacs. */
+ *p = '\\';
+ argv[0] = modname;
+ }
+
+ /* Determine if there is a middle mouse button, to allow parse_button
+ to decide whether right mouse events should be mouse-2 or
+ mouse-3. */
+ XSETINT (Vw32_num_mouse_buttons, GetSystemMetrics (SM_CMOUSEBUTTONS));
+
init_user_info ();
}
get_emacs_configuration (void)
{
char *arch, *oem, *os;
+ int build_num;
/* Determine the processor type. */
switch (get_processor_type ())
/* Let oem be "*" until we figure out how to decode the OEM field. */
oem = "*";
- os = (GetVersion () & 0x80000000) ? "win95" : "nt";
+ switch (osinfo_cache.dwPlatformId) {
+ case VER_PLATFORM_WIN32_NT:
+ os = "nt";
+ build_num = osinfo_cache.dwBuildNumber;
+ break;
+ case VER_PLATFORM_WIN32_WINDOWS:
+ if (osinfo_cache.dwMinorVersion == 0) {
+ os = "windows95";
+ } else {
+ os = "windows98";
+ }
+ build_num = LOWORD (osinfo_cache.dwBuildNumber);
+ break;
+ case VER_PLATFORM_WIN32s:
+ /* Not supported, should not happen. */
+ os = "windows32s";
+ build_num = LOWORD (osinfo_cache.dwBuildNumber);
+ break;
+ default:
+ os = "unknown";
+ build_num = 0;
+ break;
+ }
+
+ if (osinfo_cache.dwPlatformId == VER_PLATFORM_WIN32_NT) {
+ sprintf (configuration_buffer, "%s-%s-%s%d.%d.%d", arch, oem, os,
+ get_w32_major_version (), get_w32_minor_version (), build_num);
+ } else {
+ sprintf (configuration_buffer, "%s-%s-%s.%d", arch, oem, os, build_num);
+ }
- sprintf (configuration_buffer, "%s-%s-%s%d.%d", arch, oem, os,
- get_nt_major_version (), get_nt_minor_version ());
return configuration_buffer;
}
}
/* ------------------------------------------------------------------------- */
-/* IO support and wrapper functions for Win32 API. */
+/* IO support and wrapper functions for W32 API. */
/* ------------------------------------------------------------------------- */
/* Place a wrapper around the MSVC version of ctime. It returns NULL
Sleep (seconds * 1000);
}
-/* Internal MSVC data and functions for low-level descriptor munging */
-#if (_MSC_VER == 900)
-extern char _osfile[];
-#endif
+/* Internal MSVC functions for low-level descriptor munging */
extern int __cdecl _set_osfhnd (int fd, long h);
extern int __cdecl _free_osfhnd (int fd);
/* parallel array of private info on file handles */
filedesc fd_info [ MAXDESC ];
-static struct {
+typedef struct volume_info_data {
+ struct volume_info_data * next;
+
+ /* time when info was obtained */
+ DWORD timestamp;
+
+ /* actual volume info */
+ char * root_dir;
DWORD serialnum;
DWORD maxcomp;
DWORD flags;
- char name[32];
- char type[32];
-} volume_info;
+ char * name;
+ char * type;
+} volume_info_data;
+
+/* Global referenced by various functions. */
+static volume_info_data volume_info;
+
+/* Vector to indicate which drives are local and fixed (for which cached
+ data never expires). */
+static BOOL fixed_drives[26];
+
+/* Consider cached volume information to be stale if older than 10s,
+ at least for non-local drives. Info for fixed drives is never stale. */
+#define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' )
+#define VOLINFO_STILL_VALID( root_dir, info ) \
+ ( ( isalpha (root_dir[0]) && \
+ fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \
+ || GetTickCount () - info->timestamp < 10000 )
+
+/* Cache support functions. */
+
+/* Simple linked list with linear search is sufficient. */
+static volume_info_data *volume_cache = NULL;
+
+static volume_info_data *
+lookup_volume_info (char * root_dir)
+{
+ volume_info_data * info;
+
+ for (info = volume_cache; info; info = info->next)
+ if (stricmp (info->root_dir, root_dir) == 0)
+ break;
+ return info;
+}
+
+static void
+add_volume_info (char * root_dir, volume_info_data * info)
+{
+ info->root_dir = strdup (root_dir);
+ info->next = volume_cache;
+ volume_cache = info;
+}
+
+
+/* Wrapper for GetVolumeInformation, which uses caching to avoid
+ performance penalty (~2ms on 486 for local drives, 7.5ms for local
+ cdrom drive, ~5-10ms or more for remote drives on LAN). */
+volume_info_data *
+GetCachedVolumeInformation (char * root_dir)
+{
+ volume_info_data * info;
+ char default_root[ MAX_PATH ];
+
+ /* NULL for root_dir means use root from current directory. */
+ if (root_dir == NULL)
+ {
+ if (GetCurrentDirectory (MAX_PATH, default_root) == 0)
+ return NULL;
+ parse_root (default_root, &root_dir);
+ *root_dir = 0;
+ root_dir = default_root;
+ }
+
+ /* Local fixed drives can be cached permanently. Removable drives
+ cannot be cached permanently, since the volume name and serial
+ number (if nothing else) can change. Remote drives should be
+ treated as if they are removable, since there is no sure way to
+ tell whether they are or not. Also, the UNC association of drive
+ letters mapped to remote volumes can be changed at any time (even
+ by other processes) without notice.
+
+ As a compromise, so we can benefit from caching info for remote
+ volumes, we use a simple expiry mechanism to invalidate cache
+ entries that are more than ten seconds old. */
+
+#if 0
+ /* No point doing this, because WNetGetConnection is even slower than
+ GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW,
+ GetDriveType is about the only call of this type which does not
+ involve network access, and so is extremely quick). */
+
+ /* Map drive letter to UNC if remote. */
+ if ( isalpha( root_dir[0] ) && !fixed[ DRIVE_INDEX( root_dir[0] ) ] )
+ {
+ char remote_name[ 256 ];
+ char drive[3] = { root_dir[0], ':' };
+
+ if (WNetGetConnection (drive, remote_name, sizeof (remote_name))
+ == NO_ERROR)
+ /* do something */ ;
+ }
+#endif
+
+ info = lookup_volume_info (root_dir);
+
+ if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info))
+ {
+ char name[ 256 ];
+ DWORD serialnum;
+ DWORD maxcomp;
+ DWORD flags;
+ char type[ 256 ];
+
+ /* Info is not cached, or is stale. */
+ if (!GetVolumeInformation (root_dir,
+ name, sizeof (name),
+ &serialnum,
+ &maxcomp,
+ &flags,
+ type, sizeof (type)))
+ return NULL;
+
+ /* Cache the volume information for future use, overwriting existing
+ entry if present. */
+ if (info == NULL)
+ {
+ info = (volume_info_data *) xmalloc (sizeof (volume_info_data));
+ add_volume_info (root_dir, info);
+ }
+ else
+ {
+ free (info->name);
+ free (info->type);
+ }
+
+ info->name = strdup (name);
+ info->serialnum = serialnum;
+ info->maxcomp = maxcomp;
+ info->flags = flags;
+ info->type = strdup (type);
+ info->timestamp = GetTickCount ();
+ }
+
+ return info;
+}
/* Get information on the volume where name is held; set path pointer to
start of pathname in name (past UNC header\volume header if present). */
{
char temp[MAX_PATH];
char *rootname = NULL; /* default to current volume */
+ volume_info_data * info;
if (name == NULL)
return FALSE;
}
while ( *name );
- if (slashes > 1)
- return FALSE;
-
*str++ = '\\';
*str = 0;
}
if (pPath)
*pPath = name;
- if (GetVolumeInformation (rootname,
- volume_info.name, 32,
- &volume_info.serialnum,
- &volume_info.maxcomp,
- &volume_info.flags,
- volume_info.type, 32))
+ info = GetCachedVolumeInformation (rootname);
+ if (info != NULL)
{
+ /* Set global referenced by other functions. */
+ volume_info = *info;
return TRUE;
}
return FALSE;
/* Map filename to a legal 8.3 name if necessary. */
const char *
-map_win32_filename (const char * name, const char ** pPath)
+map_w32_filename (const char * name, const char ** pPath)
{
static char shortname[MAX_PATH];
char * str = shortname;
char c;
- const char * orig_name = name;
char * path;
+ const char * save_name = name;
if (is_fat_volume (name, &path)) /* truncate to 8.3 */
{
}
}
*str = '\0';
-
- name = shortname;
+ }
+ else
+ {
+ strcpy (shortname, name);
+ unixtodos_filename (shortname);
}
if (pPath)
- *pPath = name + (path - orig_name);
+ *pPath = shortname + (path - save_name);
+
+ return shortname;
+}
+
+static int
+is_exec (const char * name)
+{
+ char * p = strrchr (name, '.');
+ return
+ (p != NULL
+ && (stricmp (p, ".exe") == 0 ||
+ stricmp (p, ".com") == 0 ||
+ stricmp (p, ".bat") == 0 ||
+ stricmp (p, ".cmd") == 0));
+}
+
+/* Emulate the Unix directory procedures opendir, closedir,
+ and readdir. We can't use the procedures supplied in sysdep.c,
+ so we provide them here. */
+
+struct direct dir_static; /* simulated directory contents */
+static HANDLE dir_find_handle = INVALID_HANDLE_VALUE;
+static int dir_is_fat;
+static char dir_pathname[MAXPATHLEN+1];
+static WIN32_FIND_DATA dir_find_data;
+
+/* Support shares on a network resource as subdirectories of a read-only
+ root directory. */
+static HANDLE wnet_enum_handle = INVALID_HANDLE_VALUE;
+HANDLE open_unc_volume (char *);
+char *read_unc_volume (HANDLE, char *, int);
+void close_unc_volume (HANDLE);
+
+DIR *
+opendir (char *filename)
+{
+ DIR *dirp;
+
+ /* Opening is done by FindFirstFile. However, a read is inherent to
+ this operation, so we defer the open until read time. */
- return name;
+ if (dir_find_handle != INVALID_HANDLE_VALUE)
+ return NULL;
+ if (wnet_enum_handle != INVALID_HANDLE_VALUE)
+ return NULL;
+
+ if (is_unc_volume (filename))
+ {
+ wnet_enum_handle = open_unc_volume (filename);
+ if (wnet_enum_handle == INVALID_HANDLE_VALUE)
+ return NULL;
+ }
+
+ if (!(dirp = (DIR *) malloc (sizeof (DIR))))
+ return NULL;
+
+ dirp->dd_fd = 0;
+ dirp->dd_loc = 0;
+ dirp->dd_size = 0;
+
+ strncpy (dir_pathname, map_w32_filename (filename, NULL), MAXPATHLEN);
+ dir_pathname[MAXPATHLEN] = '\0';
+ dir_is_fat = is_fat_volume (filename, NULL);
+
+ return dirp;
+}
+
+void
+closedir (DIR *dirp)
+{
+ /* If we have a find-handle open, close it. */
+ if (dir_find_handle != INVALID_HANDLE_VALUE)
+ {
+ FindClose (dir_find_handle);
+ dir_find_handle = INVALID_HANDLE_VALUE;
+ }
+ else if (wnet_enum_handle != INVALID_HANDLE_VALUE)
+ {
+ close_unc_volume (wnet_enum_handle);
+ wnet_enum_handle = INVALID_HANDLE_VALUE;
+ }
+ xfree ((char *) dirp);
+}
+
+struct direct *
+readdir (DIR *dirp)
+{
+ if (wnet_enum_handle != INVALID_HANDLE_VALUE)
+ {
+ if (!read_unc_volume (wnet_enum_handle,
+ dir_find_data.cFileName,
+ MAX_PATH))
+ return NULL;
+ }
+ /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */
+ else if (dir_find_handle == INVALID_HANDLE_VALUE)
+ {
+ char filename[MAXNAMLEN + 3];
+ int ln;
+
+ strcpy (filename, dir_pathname);
+ ln = strlen (filename) - 1;
+ if (!IS_DIRECTORY_SEP (filename[ln]))
+ strcat (filename, "\\");
+ strcat (filename, "*");
+
+ dir_find_handle = FindFirstFile (filename, &dir_find_data);
+
+ if (dir_find_handle == INVALID_HANDLE_VALUE)
+ return NULL;
+ }
+ else
+ {
+ if (!FindNextFile (dir_find_handle, &dir_find_data))
+ return NULL;
+ }
+
+ /* Emacs never uses this value, so don't bother making it match
+ value returned by stat(). */
+ dir_static.d_ino = 1;
+
+ dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 +
+ dir_static.d_namlen - dir_static.d_namlen % 4;
+
+ dir_static.d_namlen = strlen (dir_find_data.cFileName);
+ strcpy (dir_static.d_name, dir_find_data.cFileName);
+ if (dir_is_fat)
+ _strlwr (dir_static.d_name);
+ else if (!NILP (Vw32_downcase_file_names))
+ {
+ register char *p;
+ for (p = dir_static.d_name; *p; p++)
+ if (*p >= 'a' && *p <= 'z')
+ break;
+ if (!*p)
+ _strlwr (dir_static.d_name);
+ }
+
+ return &dir_static;
+}
+
+HANDLE
+open_unc_volume (char *path)
+{
+ NETRESOURCE nr;
+ HANDLE henum;
+ int result;
+
+ nr.dwScope = RESOURCE_GLOBALNET;
+ nr.dwType = RESOURCETYPE_DISK;
+ nr.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER;
+ nr.dwUsage = RESOURCEUSAGE_CONTAINER;
+ nr.lpLocalName = NULL;
+ nr.lpRemoteName = map_w32_filename (path, NULL);
+ nr.lpComment = NULL;
+ nr.lpProvider = NULL;
+
+ result = WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
+ RESOURCEUSAGE_CONNECTABLE, &nr, &henum);
+
+ if (result == NO_ERROR)
+ return henum;
+ else
+ return INVALID_HANDLE_VALUE;
+}
+
+char *
+read_unc_volume (HANDLE henum, char *readbuf, int size)
+{
+ int count;
+ int result;
+ int bufsize = 512;
+ char *buffer;
+ char *ptr;
+
+ count = 1;
+ buffer = alloca (bufsize);
+ result = WNetEnumResource (wnet_enum_handle, &count, buffer, &bufsize);
+ if (result != NO_ERROR)
+ return NULL;
+
+ /* WNetEnumResource returns \\resource\share...skip forward to "share". */
+ ptr = ((LPNETRESOURCE) buffer)->lpRemoteName;
+ ptr += 2;
+ while (*ptr && !IS_DIRECTORY_SEP (*ptr)) ptr++;
+ ptr++;
+
+ strncpy (readbuf, ptr, size);
+ return readbuf;
+}
+
+void
+close_unc_volume (HANDLE henum)
+{
+ if (henum != INVALID_HANDLE_VALUE)
+ WNetCloseEnum (henum);
+}
+
+DWORD
+unc_volume_file_attributes (char *path)
+{
+ HANDLE henum;
+ DWORD attrs;
+
+ henum = open_unc_volume (path);
+ if (henum == INVALID_HANDLE_VALUE)
+ return -1;
+
+ attrs = FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY;
+
+ close_unc_volume (henum);
+
+ return attrs;
}
int
sys_access (const char * path, int mode)
{
- return _access (map_win32_filename (path, NULL), mode);
+ DWORD attributes;
+
+ /* MSVC implementation doesn't recognize D_OK. */
+ path = map_w32_filename (path, NULL);
+ if (is_unc_volume (path))
+ {
+ attributes = unc_volume_file_attributes (path);
+ if (attributes == -1) {
+ errno = EACCES;
+ return -1;
+ }
+ }
+ else if ((attributes = GetFileAttributes (path)) == -1)
+ {
+ /* Should try mapping GetLastError to errno; for now just indicate
+ that path doesn't exist. */
+ errno = EACCES;
+ return -1;
+ }
+ if ((mode & X_OK) != 0 && !is_exec (path))
+ {
+ errno = EACCES;
+ return -1;
+ }
+ if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0)
+ {
+ errno = EACCES;
+ return -1;
+ }
+ if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
+ {
+ errno = EACCES;
+ return -1;
+ }
+ return 0;
}
int
sys_chdir (const char * path)
{
- return _chdir (map_win32_filename (path, NULL));
+ return _chdir (map_w32_filename (path, NULL));
}
int
sys_chmod (const char * path, int mode)
{
- return _chmod (map_win32_filename (path, NULL), mode);
+ return _chmod (map_w32_filename (path, NULL), mode);
}
int
sys_creat (const char * path, int mode)
{
- return _creat (map_win32_filename (path, NULL), mode);
+ return _creat (map_w32_filename (path, NULL), mode);
}
FILE *
}
else break;
- fd = _open (map_win32_filename (path, NULL), oflag | _O_NOINHERIT, 0644);
+ fd = _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, 0644);
if (fd < 0)
return NULL;
- return fdopen (fd, mode_save);
+ return _fdopen (fd, mode_save);
}
+/* This only works on NTFS volumes, but is useful to have. */
int
-sys_link (const char * path1, const char * path2)
+sys_link (const char * old, const char * new)
{
- errno = EINVAL;
- return -1;
+ HANDLE fileh;
+ int result = -1;
+ char oldname[MAX_PATH], newname[MAX_PATH];
+
+ if (old == NULL || new == NULL)
+ {
+ errno = ENOENT;
+ return -1;
+ }
+
+ strcpy (oldname, map_w32_filename (old, NULL));
+ strcpy (newname, map_w32_filename (new, NULL));
+
+ fileh = CreateFile (oldname, 0, 0, NULL, OPEN_EXISTING,
+ FILE_FLAG_BACKUP_SEMANTICS, NULL);
+ if (fileh != INVALID_HANDLE_VALUE)
+ {
+ int wlen;
+
+ /* Confusingly, the "alternate" stream name field does not apply
+ when restoring a hard link, and instead contains the actual
+ stream data for the link (ie. the name of the link to create).
+ The WIN32_STREAM_ID structure before the cStreamName field is
+ the stream header, which is then immediately followed by the
+ stream data. */
+
+ struct {
+ WIN32_STREAM_ID wid;
+ WCHAR wbuffer[MAX_PATH]; /* extra space for link name */
+ } data;
+
+ wlen = MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, newname, -1,
+ data.wid.cStreamName, MAX_PATH);
+ if (wlen > 0)
+ {
+ LPVOID context = NULL;
+ DWORD wbytes = 0;
+
+ data.wid.dwStreamId = BACKUP_LINK;
+ data.wid.dwStreamAttributes = 0;
+ data.wid.Size.LowPart = wlen * sizeof(WCHAR);
+ data.wid.Size.HighPart = 0;
+ data.wid.dwStreamNameSize = 0;
+
+ if (BackupWrite (fileh, (LPBYTE)&data,
+ offsetof (WIN32_STREAM_ID, cStreamName)
+ + data.wid.Size.LowPart,
+ &wbytes, FALSE, FALSE, &context)
+ && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context))
+ {
+ /* succeeded */
+ result = 0;
+ }
+ else
+ {
+ /* Should try mapping GetLastError to errno; for now just
+ indicate a general error (eg. links not supported). */
+ errno = EINVAL; // perhaps EMLINK?
+ }
+ }
+
+ CloseHandle (fileh);
+ }
+ else
+ errno = ENOENT;
+
+ return result;
}
int
sys_mkdir (const char * path)
{
- return _mkdir (map_win32_filename (path, NULL));
+ return _mkdir (map_w32_filename (path, NULL));
}
+/* Because of long name mapping issues, we need to implement this
+ ourselves. Also, MSVC's _mktemp returns NULL when it can't generate
+ a unique name, instead of setting the input template to an empty
+ string.
+
+ Standard algorithm seems to be use pid or tid with a letter on the
+ front (in place of the 6 X's) and cycle through the letters to find a
+ unique name. We extend that to allow any reasonable character as the
+ first of the 6 X's. */
char *
sys_mktemp (char * template)
{
- return (char *) map_win32_filename ((const char *) _mktemp (template), NULL);
+ char * p;
+ int i;
+ unsigned uid = GetCurrentThreadId ();
+ static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#";
+
+ if (template == NULL)
+ return NULL;
+ p = template + strlen (template);
+ i = 5;
+ /* replace up to the last 5 X's with uid in decimal */
+ while (--p >= template && p[0] == 'X' && --i >= 0)
+ {
+ p[0] = '0' + uid % 10;
+ uid /= 10;
+ }
+
+ if (i < 0 && p[0] == 'X')
+ {
+ i = 0;
+ do
+ {
+ int save_errno = errno;
+ p[0] = first_char[i];
+ if (sys_access (template, 0) < 0)
+ {
+ errno = save_errno;
+ return template;
+ }
+ }
+ while (++i < sizeof (first_char));
+ }
+
+ /* Template is badly formed or else we can't generate a unique name,
+ so return empty string */
+ template[0] = 0;
+ return template;
}
int
sys_open (const char * path, int oflag, int mode)
{
/* Force all file handles to be non-inheritable. */
- return _open (map_win32_filename (path, NULL), oflag | _O_NOINHERIT, mode);
+ return _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, mode);
}
int
sys_rename (const char * oldname, const char * newname)
{
+ int result;
char temp[MAX_PATH];
- /* MoveFile on Win95 doesn't correctly change the short file name
- alias when oldname has a three char extension and newname has the
- same first three chars in its extension. To avoid problems, on
- Win95 we rename to a temporary name first. */
+ /* MoveFile on Windows 95 doesn't correctly change the short file name
+ alias in a number of circumstances (it is not easy to predict when
+ just by looking at oldname and newname, unfortunately). In these
+ cases, renaming through a temporary name avoids the problem.
+
+ A second problem on Windows 95 is that renaming through a temp name when
+ newname is uppercase fails (the final long name ends up in
+ lowercase, although the short alias might be uppercase) UNLESS the
+ long temp name is not 8.3.
+
+ So, on Windows 95 we always rename through a temp name, and we make sure
+ the temp name has a long extension to ensure correct renaming. */
- strcpy (temp, map_win32_filename (oldname, NULL));
+ strcpy (temp, map_w32_filename (oldname, NULL));
- if (GetVersion () & 0x80000000)
+ if (os_subtype == OS_WIN95)
{
+ char * o;
char * p;
+ int i = 0;
+
+ oldname = map_w32_filename (oldname, NULL);
+ if (o = strrchr (oldname, '\\'))
+ o++;
+ else
+ o = (char *) oldname;
- unixtodos_filename (temp);
if (p = strrchr (temp, '\\'))
p++;
else
p = temp;
- strcpy (p, "__XXXXXX");
- _mktemp (temp);
- if (rename (map_win32_filename (oldname, NULL), temp) < 0)
+
+ do
+ {
+ /* Force temp name to require a manufactured 8.3 alias - this
+ seems to make the second rename work properly. */
+ sprintf (p, "_.%s.%u", o, i);
+ i++;
+ result = rename (oldname, temp);
+ }
+ /* This loop must surely terminate! */
+ while (result < 0 && (errno == EEXIST || errno == EACCES));
+ if (result < 0)
return -1;
}
/* Emulate Unix behaviour - newname is deleted if it already exists
- (at least if it is a file; don't do this for directories). */
- newname = map_win32_filename (newname, NULL);
- if (GetFileAttributes (newname) != -1)
- {
- _chmod (newname, 0666);
- _unlink (newname);
- }
+ (at least if it is a file; don't do this for directories).
+
+ Since we mustn't do this if we are just changing the case of the
+ file name (we would end up deleting the file we are trying to
+ rename!), we let rename detect if the destination file already
+ exists - that way we avoid the possible pitfalls of trying to
+ determine ourselves whether two names really refer to the same
+ file, which is not always possible in the general case. (Consider
+ all the permutations of shared or subst'd drives, etc.) */
+
+ newname = map_w32_filename (newname, NULL);
+ result = rename (temp, newname);
+
+ if (result < 0
+ && (errno == EEXIST || errno == EACCES)
+ && _chmod (newname, 0666) == 0
+ && _unlink (newname) == 0)
+ result = rename (temp, newname);
- return rename (temp, newname);
+ return result;
}
int
sys_rmdir (const char * path)
{
- return _rmdir (map_win32_filename (path, NULL));
+ return _rmdir (map_w32_filename (path, NULL));
}
int
sys_unlink (const char * path)
{
- return _unlink (map_win32_filename (path, NULL));
+ path = map_w32_filename (path, NULL);
+
+ /* On Unix, unlink works without write permission. */
+ _chmod (path, 0666);
+ return _unlink (path);
}
static FILETIME utc_base_ft;
return (time_t) (ret * 1e-7);
}
-#if 0
-/* in case we ever have need of this */
void
convert_from_time_t (time_t time, FILETIME * pft)
{
/* time in 100ns units since 1-Jan-1601 */
tmp = (long double) time * 1e7 + utc_base;
pft->dwHighDateTime = (DWORD) (tmp / (4096.0 * 1024 * 1024));
- pft->dwLowDateTime = (DWORD) (tmp - pft->dwHighDateTime);
+ pft->dwLowDateTime = (DWORD) (tmp - (4096.0 * 1024 * 1024) * pft->dwHighDateTime);
}
-#endif
-/* "PJW" algorithm (see the "Dragon" compiler book). */
+#if 0
+/* No reason to keep this; faking inode values either by hashing or even
+ using the file index from GetInformationByHandle, is not perfect and
+ so by default Emacs doesn't use the inode values on Windows.
+ Instead, we now determine file-truename correctly (except for
+ possible drive aliasing etc). */
+
+/* Modified version of "PJW" algorithm (see the "Dragon" compiler book). */
static unsigned
-hashval (const char * str)
+hashval (const unsigned char * str)
{
unsigned h = 0;
- unsigned g;
while (*str)
{
h = (h << 4) + *str++;
- if ((g = h & 0xf0000000) != 0)
- h = (h ^ (g >> 24)) & 0x0fffffff;
+ h ^= (h >> 28);
}
return h;
}
/* Return the hash value of the canonical pathname, excluding the
drive/UNC header, to get a hopefully unique inode number. */
-static _ino_t
+static DWORD
generate_inode_val (const char * name)
{
char fullname[ MAX_PATH ];
char * p;
unsigned hash;
- GetFullPathName (name, sizeof (fullname), fullname, &p);
- get_volume_info (fullname, &p);
- /* Normal Win32 filesystems are still case insensitive. */
+ /* Get the truly canonical filename, if it exists. (Note: this
+ doesn't resolve aliasing due to subst commands, or recognise hard
+ links. */
+ if (!w32_get_long_filename ((char *)name, fullname, MAX_PATH))
+ abort ();
+
+ parse_root (fullname, &p);
+ /* Normal W32 filesystems are still case insensitive. */
_strlwr (p);
- hash = hashval (p);
- return (_ino_t) (hash ^ (hash >> 16));
+ return hashval (p);
}
+#endif
+
/* MSVC stat function can't cope with UNC names and has other bugs, so
replace it with our own. This also allows us to calculate consistent
inode values without hacks in the main Emacs code. */
int
stat (const char * path, struct stat * buf)
{
- char * name;
+ char *name, *r;
WIN32_FIND_DATA wfd;
HANDLE fh;
+ DWORD fake_inode;
int permission;
int len;
int rootdir = FALSE;
return -1;
}
- name = (char *) map_win32_filename (path, &path);
- /* must be valid filename, no wild cards */
- if (strchr (name, '*') || strchr (name, '?'))
+ name = (char *) map_w32_filename (path, &path);
+ /* must be valid filename, no wild cards or other invalid characters */
+ if (strpbrk (name, "*?|<>\""))
{
errno = ENOENT;
return -1;
}
+ /* If name is "c:/.." or "/.." then stat "c:/" or "/". */
+ r = IS_DEVICE_SEP (name[1]) ? &name[2] : name;
+ if (IS_DIRECTORY_SEP (r[0]) && r[1] == '.' && r[2] == '.' && r[3] == '\0')
+ {
+ r[1] = r[2] = '\0';
+ }
+
/* Remove trailing directory separator, unless name is the root
directory of a drive or UNC volume in which case ensure there
is a trailing separator. */
&& (IS_DIRECTORY_SEP (*path) || *path == 0));
name = strcpy (alloca (len + 2), name);
- if (rootdir)
+ if (is_unc_volume (name))
+ {
+ DWORD attrs = unc_volume_file_attributes (name);
+
+ if (attrs == -1)
+ return -1;
+
+ memset (&wfd, 0, sizeof (wfd));
+ wfd.dwFileAttributes = attrs;
+ wfd.ftCreationTime = utc_base_ft;
+ wfd.ftLastAccessTime = utc_base_ft;
+ wfd.ftLastWriteTime = utc_base_ft;
+ strcpy (wfd.cFileName, name);
+ }
+ else if (rootdir)
{
if (!IS_DIRECTORY_SEP (name[len-1]))
strcat (name, "\\");
{
if (IS_DIRECTORY_SEP (name[len-1]))
name[len - 1] = 0;
- fh = FindFirstFile (name, &wfd);
- if (fh == INVALID_HANDLE_VALUE)
+
+ /* (This is hacky, but helps when doing file completions on
+ network drives.) Optimize by using information available from
+ active readdir if possible. */
+ len = strlen (dir_pathname);
+ if (IS_DIRECTORY_SEP (dir_pathname[len-1]))
+ len--;
+ if (dir_find_handle != INVALID_HANDLE_VALUE
+ && strnicmp (name, dir_pathname, len) == 0
+ && IS_DIRECTORY_SEP (name[len])
+ && stricmp (name + len + 1, dir_static.d_name) == 0)
{
- errno = ENOENT;
- return -1;
+ /* This was the last entry returned by readdir. */
+ wfd = dir_find_data;
+ }
+ else
+ {
+ fh = FindFirstFile (name, &wfd);
+ if (fh == INVALID_HANDLE_VALUE)
+ {
+ errno = ENOENT;
+ return -1;
+ }
+ FindClose (fh);
}
- FindClose (fh);
}
if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
buf->st_mode = _S_IFDIR;
buf->st_nlink = 2; /* doesn't really matter */
+ fake_inode = 0; /* this doesn't either I think */
}
- else
+ else if (!NILP (Vw32_get_true_file_attributes)
+ /* No access rights required to get info. */
+ && (fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING, 0, NULL))
+ != INVALID_HANDLE_VALUE)
{
-#if 0
/* This is more accurate in terms of gettting the correct number
of links, but is quite slow (it is noticable when Emacs is
making a list of file name completions). */
BY_HANDLE_FILE_INFORMATION info;
- fh = CreateFile (name, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
- NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
-
if (GetFileInformationByHandle (fh, &info))
{
- switch (GetFileType (fh))
- {
- case FILE_TYPE_DISK:
- buf->st_mode = _S_IFREG;
- break;
- case FILE_TYPE_PIPE:
- buf->st_mode = _S_IFIFO;
- break;
- case FILE_TYPE_CHAR:
- case FILE_TYPE_UNKNOWN:
- default:
- buf->st_mode = _S_IFCHR;
- }
buf->st_nlink = info.nNumberOfLinks;
- /* Could use file index, but this is not guaranteed to be
- unique unless we keep a handle open all the time. */
- /* buf->st_ino = info.nFileIndexLow ^ info.nFileIndexHigh; */
- CloseHandle (fh);
+ /* Might as well use file index to fake inode values, but this
+ is not guaranteed to be unique unless we keep a handle open
+ all the time (even then there are situations where it is
+ not unique). Reputedly, there are at most 48 bits of info
+ (on NTFS, presumably less on FAT). */
+ fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh;
}
else
{
- errno = EACCES;
- return -1;
+ buf->st_nlink = 1;
+ fake_inode = 0;
}
-#else
+
+ switch (GetFileType (fh))
+ {
+ case FILE_TYPE_DISK:
+ buf->st_mode = _S_IFREG;
+ break;
+ case FILE_TYPE_PIPE:
+ buf->st_mode = _S_IFIFO;
+ break;
+ case FILE_TYPE_CHAR:
+ case FILE_TYPE_UNKNOWN:
+ default:
+ buf->st_mode = _S_IFCHR;
+ }
+ CloseHandle (fh);
+ }
+ else
+ {
+ /* Don't bother to make this information more accurate. */
buf->st_mode = _S_IFREG;
buf->st_nlink = 1;
-#endif
+ fake_inode = 0;
+ }
+
+#if 0
+ /* Not sure if there is any point in this. */
+ if (!NILP (Vw32_generate_fake_inodes))
+ fake_inode = generate_inode_val (name);
+ else if (fake_inode == 0)
+ {
+ /* For want of something better, try to make everything unique. */
+ static DWORD gen_num = 0;
+ fake_inode = ++gen_num;
}
+#endif
+
+ /* MSVC defines _ino_t to be short; other libc's might not. */
+ if (sizeof (buf->st_ino) == 2)
+ buf->st_ino = fake_inode ^ (fake_inode >> 16);
+ else
+ buf->st_ino = fake_inode;
/* consider files to belong to current user */
buf->st_uid = the_passwd.pw_uid;
buf->st_gid = the_passwd.pw_gid;
- /* volume_info is set indirectly by map_win32_filename */
+ /* volume_info is set indirectly by map_w32_filename */
buf->st_dev = volume_info.serialnum;
buf->st_rdev = volume_info.serialnum;
- buf->st_ino = generate_inode_val (name);
buf->st_size = wfd.nFileSizeLow;
if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
permission |= _S_IEXEC;
+ else if (is_exec (name))
+ permission |= _S_IEXEC;
+
+ buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
+
+ return 0;
+}
+
+/* Provide fstat and utime as well as stat for consistent handling of
+ file timestamps. */
+int
+fstat (int desc, struct stat * buf)
+{
+ HANDLE fh = (HANDLE) _get_osfhandle (desc);
+ BY_HANDLE_FILE_INFORMATION info;
+ DWORD fake_inode;
+ int permission;
+
+ switch (GetFileType (fh) & ~FILE_TYPE_REMOTE)
+ {
+ case FILE_TYPE_DISK:
+ buf->st_mode = _S_IFREG;
+ if (!GetFileInformationByHandle (fh, &info))
+ {
+ errno = EACCES;
+ return -1;
+ }
+ break;
+ case FILE_TYPE_PIPE:
+ buf->st_mode = _S_IFIFO;
+ goto non_disk;
+ case FILE_TYPE_CHAR:
+ case FILE_TYPE_UNKNOWN:
+ default:
+ buf->st_mode = _S_IFCHR;
+ non_disk:
+ memset (&info, 0, sizeof (info));
+ info.dwFileAttributes = 0;
+ info.ftCreationTime = utc_base_ft;
+ info.ftLastAccessTime = utc_base_ft;
+ info.ftLastWriteTime = utc_base_ft;
+ }
+
+ if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+ {
+ buf->st_mode = _S_IFDIR;
+ buf->st_nlink = 2; /* doesn't really matter */
+ fake_inode = 0; /* this doesn't either I think */
+ }
+ else
+ {
+ buf->st_nlink = info.nNumberOfLinks;
+ /* Might as well use file index to fake inode values, but this
+ is not guaranteed to be unique unless we keep a handle open
+ all the time (even then there are situations where it is
+ not unique). Reputedly, there are at most 48 bits of info
+ (on NTFS, presumably less on FAT). */
+ fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh;
+ }
+
+ /* MSVC defines _ino_t to be short; other libc's might not. */
+ if (sizeof (buf->st_ino) == 2)
+ buf->st_ino = fake_inode ^ (fake_inode >> 16);
+ else
+ buf->st_ino = fake_inode;
+
+ /* consider files to belong to current user */
+ buf->st_uid = 0;
+ buf->st_gid = 0;
+
+ buf->st_dev = info.dwVolumeSerialNumber;
+ buf->st_rdev = info.dwVolumeSerialNumber;
+
+ buf->st_size = info.nFileSizeLow;
+
+ /* Convert timestamps to Unix format. */
+ buf->st_mtime = convert_time (info.ftLastWriteTime);
+ buf->st_atime = convert_time (info.ftLastAccessTime);
+ if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
+ buf->st_ctime = convert_time (info.ftCreationTime);
+ if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
+
+ /* determine rwx permissions */
+ if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
+ permission = _S_IREAD;
+ else
+ permission = _S_IREAD | _S_IWRITE;
+
+ if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+ permission |= _S_IEXEC;
else
{
+#if 0 /* no way of knowing the filename */
char * p = strrchr (name, '.');
if (p != NULL &&
(stricmp (p, ".exe") == 0 ||
stricmp (p, ".bat") == 0 ||
stricmp (p, ".cmd") == 0))
permission |= _S_IEXEC;
+#endif
}
buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
return 0;
}
+int
+utime (const char *name, struct utimbuf *times)
+{
+ struct utimbuf deftime;
+ HANDLE fh;
+ FILETIME mtime;
+ FILETIME atime;
+
+ if (times == NULL)
+ {
+ deftime.modtime = deftime.actime = time (NULL);
+ times = &deftime;
+ }
+
+ /* Need write access to set times. */
+ fh = CreateFile (name, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE,
+ 0, OPEN_EXISTING, 0, NULL);
+ if (fh)
+ {
+ convert_from_time_t (times->actime, &atime);
+ convert_from_time_t (times->modtime, &mtime);
+ if (!SetFileTime (fh, NULL, &atime, &mtime))
+ {
+ CloseHandle (fh);
+ errno = EACCES;
+ return -1;
+ }
+ CloseHandle (fh);
+ }
+ else
+ {
+ errno = EINVAL;
+ return -1;
+ }
+ return 0;
+}
+
#ifdef HAVE_SOCKETS
/* Wrappers for winsock functions to map between our file descriptors
int (PASCAL *pfn_gethostname) (char * name, int namelen);
struct hostent * (PASCAL *pfn_gethostbyname) (const char * name);
struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto);
+
+/* SetHandleInformation is only needed to make sockets non-inheritable. */
+BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags);
+#ifndef HANDLE_FLAG_INHERIT
+#define HANDLE_FLAG_INHERIT 1
+#endif
-static int have_winsock;
-static HANDLE winsock_lib;
+HANDLE winsock_lib;
+static int winsock_inuse;
-static void
+BOOL
term_winsock (void)
{
- if (have_winsock)
+ if (winsock_lib != NULL && winsock_inuse == 0)
{
- pfn_WSACleanup ();
- FreeLibrary (winsock_lib);
+ /* Not sure what would cause WSAENETDOWN, or even if it can happen
+ after WSAStartup returns successfully, but it seems reasonable
+ to allow unloading winsock anyway in that case. */
+ if (pfn_WSACleanup () == 0 ||
+ pfn_WSAGetLastError () == WSAENETDOWN)
+ {
+ if (FreeLibrary (winsock_lib))
+ winsock_lib = NULL;
+ return TRUE;
+ }
}
+ return FALSE;
}
-static void
-init_winsock ()
+BOOL
+init_winsock (int load_now)
{
WSADATA winsockData;
+ if (winsock_lib != NULL)
+ return TRUE;
+
+ pfn_SetHandleInformation = NULL;
+ pfn_SetHandleInformation
+ = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"),
+ "SetHandleInformation");
+
winsock_lib = LoadLibrary ("wsock32.dll");
if (winsock_lib != NULL)
LOAD_PROC( getservbyname );
LOAD_PROC( WSACleanup );
+#undef LOAD_PROC
+
/* specify version 1.1 of winsock */
if (pfn_WSAStartup (0x101, &winsockData) == 0)
{
- have_winsock = TRUE;
- return;
+ if (winsockData.wVersion != 0x101)
+ goto fail;
+
+ if (!load_now)
+ {
+ /* Report that winsock exists and is usable, but leave
+ socket functions disabled. I am assuming that calling
+ WSAStartup does not require any network interaction,
+ and in particular does not cause or require a dial-up
+ connection to be established. */
+
+ pfn_WSACleanup ();
+ FreeLibrary (winsock_lib);
+ winsock_lib = NULL;
+ }
+ winsock_inuse = 0;
+ return TRUE;
}
fail:
FreeLibrary (winsock_lib);
+ winsock_lib = NULL;
}
- have_winsock = FALSE;
+
+ return FALSE;
}
are already in <sys/socket.h> */
static void set_errno ()
{
- if (!have_winsock)
+ if (winsock_lib == NULL)
h_errno = EINVAL;
else
h_errno = pfn_WSAGetLastError ();
static void check_errno ()
{
- if (h_errno == 0 && have_winsock)
+ if (h_errno == 0 && winsock_lib != NULL)
pfn_WSASetLastError (0);
}
+/* Extend strerror to handle the winsock-specific error codes. */
+struct {
+ int errnum;
+ char * msg;
+} _wsa_errlist[] = {
+ WSAEINTR , "Interrupted function call",
+ WSAEBADF , "Bad file descriptor",
+ WSAEACCES , "Permission denied",
+ WSAEFAULT , "Bad address",
+ WSAEINVAL , "Invalid argument",
+ WSAEMFILE , "Too many open files",
+
+ WSAEWOULDBLOCK , "Resource temporarily unavailable",
+ WSAEINPROGRESS , "Operation now in progress",
+ WSAEALREADY , "Operation already in progress",
+ WSAENOTSOCK , "Socket operation on non-socket",
+ WSAEDESTADDRREQ , "Destination address required",
+ WSAEMSGSIZE , "Message too long",
+ WSAEPROTOTYPE , "Protocol wrong type for socket",
+ WSAENOPROTOOPT , "Bad protocol option",
+ WSAEPROTONOSUPPORT , "Protocol not supported",
+ WSAESOCKTNOSUPPORT , "Socket type not supported",
+ WSAEOPNOTSUPP , "Operation not supported",
+ WSAEPFNOSUPPORT , "Protocol family not supported",
+ WSAEAFNOSUPPORT , "Address family not supported by protocol family",
+ WSAEADDRINUSE , "Address already in use",
+ WSAEADDRNOTAVAIL , "Cannot assign requested address",
+ WSAENETDOWN , "Network is down",
+ WSAENETUNREACH , "Network is unreachable",
+ WSAENETRESET , "Network dropped connection on reset",
+ WSAECONNABORTED , "Software caused connection abort",
+ WSAECONNRESET , "Connection reset by peer",
+ WSAENOBUFS , "No buffer space available",
+ WSAEISCONN , "Socket is already connected",
+ WSAENOTCONN , "Socket is not connected",
+ WSAESHUTDOWN , "Cannot send after socket shutdown",
+ WSAETOOMANYREFS , "Too many references", /* not sure */
+ WSAETIMEDOUT , "Connection timed out",
+ WSAECONNREFUSED , "Connection refused",
+ WSAELOOP , "Network loop", /* not sure */
+ WSAENAMETOOLONG , "Name is too long",
+ WSAEHOSTDOWN , "Host is down",
+ WSAEHOSTUNREACH , "No route to host",
+ WSAENOTEMPTY , "Buffer not empty", /* not sure */
+ WSAEPROCLIM , "Too many processes",
+ WSAEUSERS , "Too many users", /* not sure */
+ WSAEDQUOT , "Double quote in host name", /* really not sure */
+ WSAESTALE , "Data is stale", /* not sure */
+ WSAEREMOTE , "Remote error", /* not sure */
+
+ WSASYSNOTREADY , "Network subsystem is unavailable",
+ WSAVERNOTSUPPORTED , "WINSOCK.DLL version out of range",
+ WSANOTINITIALISED , "Winsock not initialized successfully",
+ WSAEDISCON , "Graceful shutdown in progress",
+#ifdef WSAENOMORE
+ WSAENOMORE , "No more operations allowed", /* not sure */
+ WSAECANCELLED , "Operation cancelled", /* not sure */
+ WSAEINVALIDPROCTABLE , "Invalid procedure table from service provider",
+ WSAEINVALIDPROVIDER , "Invalid service provider version number",
+ WSAEPROVIDERFAILEDINIT , "Unable to initialize a service provider",
+ WSASYSCALLFAILURE , "System call failured",
+ WSASERVICE_NOT_FOUND , "Service not found", /* not sure */
+ WSATYPE_NOT_FOUND , "Class type not found",
+ WSA_E_NO_MORE , "No more resources available", /* really not sure */
+ WSA_E_CANCELLED , "Operation already cancelled", /* really not sure */
+ WSAEREFUSED , "Operation refused", /* not sure */
+#endif
+
+ WSAHOST_NOT_FOUND , "Host not found",
+ WSATRY_AGAIN , "Authoritative host not found during name lookup",
+ WSANO_RECOVERY , "Non-recoverable error during name lookup",
+ WSANO_DATA , "Valid name, no data record of requested type",
+
+ -1, NULL
+};
+
+char *
+sys_strerror(int error_no)
+{
+ int i;
+ static char unknown_msg[40];
+
+ if (error_no >= 0 && error_no < _sys_nerr)
+ return _sys_errlist[error_no];
+
+ for (i = 0; _wsa_errlist[i].errnum >= 0; i++)
+ if (_wsa_errlist[i].errnum == error_no)
+ return _wsa_errlist[i].msg;
+
+ sprintf(unknown_msg, "Unidentified error: %d", error_no);
+ return unknown_msg;
+}
+
/* [andrewi 3-May-96] I've had conflicting results using both methods,
but I believe the method of keeping the socket handle separate (and
insuring it is not inheritable) is the correct one. */
long s;
child_process * cp;
- if (!have_winsock)
+ if (winsock_lib == NULL)
{
h_errno = ENETDOWN;
return INVALID_SOCKET;
parent = GetCurrentProcess ();
- DuplicateHandle (parent,
- (HANDLE) s,
- parent,
- &new_s,
- 0,
- FALSE,
- DUPLICATE_SAME_ACCESS);
- pfn_closesocket (s);
- fd_info[fd].hnd = new_s;
- s = (SOCKET) new_s;
+ /* Apparently there is a bug in NT 3.51 with some service
+ packs, which prevents using DuplicateHandle to make a
+ socket handle non-inheritable (causes WSACleanup to
+ hang). The work-around is to use SetHandleInformation
+ instead if it is available and implemented. */
+ if (!pfn_SetHandleInformation
+ || !pfn_SetHandleInformation ((HANDLE) s,
+ HANDLE_FLAG_INHERIT,
+ 0))
+ {
+ DuplicateHandle (parent,
+ (HANDLE) s,
+ parent,
+ &new_s,
+ 0,
+ FALSE,
+ DUPLICATE_SAME_ACCESS);
+ pfn_closesocket (s);
+ s = (SOCKET) new_s;
+ }
+ fd_info[fd].hnd = (HANDLE) s;
}
#endif
fd_info[ fd ].cp = cp;
/* success! */
+ winsock_inuse++; /* count open sockets */
return fd;
}
int
sys_bind (int s, const struct sockaddr * addr, int namelen)
{
- if (!have_winsock)
+ if (winsock_lib == NULL)
{
h_errno = ENOTSOCK;
return SOCKET_ERROR;
int
sys_connect (int s, const struct sockaddr * name, int namelen)
{
- if (!have_winsock)
+ if (winsock_lib == NULL)
{
h_errno = ENOTSOCK;
return SOCKET_ERROR;
u_short
sys_htons (u_short hostshort)
{
- return (have_winsock) ?
+ return (winsock_lib != NULL) ?
pfn_htons (hostshort) : hostshort;
}
u_short
sys_ntohs (u_short netshort)
{
- return (have_winsock) ?
+ return (winsock_lib != NULL) ?
pfn_ntohs (netshort) : netshort;
}
unsigned long
sys_inet_addr (const char * cp)
{
- return (have_winsock) ?
+ return (winsock_lib != NULL) ?
pfn_inet_addr (cp) : INADDR_NONE;
}
int
sys_gethostname (char * name, int namelen)
{
- if (have_winsock)
+ if (winsock_lib != NULL)
return pfn_gethostname (name, namelen);
if (namelen > MAX_COMPUTERNAME_LENGTH)
{
struct hostent * host;
- if (!have_winsock)
+ if (winsock_lib == NULL)
{
h_errno = ENETDOWN;
return NULL;
{
struct servent * serv;
- if (!have_winsock)
+ if (winsock_lib == NULL)
{
h_errno = ENETDOWN;
return NULL;
return serv;
}
+int
+sys_shutdown (int s, int how)
+{
+ int rc;
+
+ if (winsock_lib == NULL)
+ {
+ h_errno = ENETDOWN;
+ return SOCKET_ERROR;
+ }
+
+ check_errno ();
+ if (fd_info[s].flags & FILE_SOCKET)
+ {
+ int rc = pfn_shutdown (SOCK_HANDLE (s), how);
+ if (rc == SOCKET_ERROR)
+ set_errno ();
+ return rc;
+ }
+ h_errno = ENOTSOCK;
+ return SOCKET_ERROR;
+}
+
#endif /* HAVE_SOCKETS */
}
if (i == MAXDESC)
{
-#if defined (HAVE_SOCKETS) && !defined (SOCK_REPLACE_HANDLE)
+#ifdef HAVE_SOCKETS
if (fd_info[fd].flags & FILE_SOCKET)
{
- if (!have_winsock) abort ();
+#ifndef SOCK_REPLACE_HANDLE
+ if (winsock_lib == NULL) abort ();
pfn_shutdown (SOCK_HANDLE (fd), 2);
rc = pfn_closesocket (SOCK_HANDLE (fd));
+#endif
+ winsock_inuse--; /* count open sockets */
}
#endif
delete_child (cp);
}
/* Note that sockets do not need special treatment here (at least on
- NT and Win95 using the standard tcp/ip stacks) - it appears that
+ NT and Windows 95 using the standard tcp/ip stacks) - it appears that
closesocket is equivalent to CloseHandle, which is to be expected
because socket handles are fully fledged kernel handles. */
rc = _close (fd);
return rc;
}
-/* From callproc.c */
-extern Lisp_Object Vbinary_process_input;
-extern Lisp_Object Vbinary_process_output;
-
/* Unix pipe() has only one arg */
int
sys_pipe (int * phandles)
unsigned flags;
child_process * cp;
- /* make pipe handles non-inheritable; when we spawn a child,
- we replace the relevant handle with an inheritable one. */
- rc = _pipe (phandles, 0, _O_NOINHERIT);
+ /* make pipe handles non-inheritable; when we spawn a child, we
+ replace the relevant handle with an inheritable one. Also put
+ pipes into binary mode; we will do text mode translation ourselves
+ if required. */
+ rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY);
if (rc == 0)
{
- /* set internal flags, and put read and write handles into binary
- mode as necessary; if not in binary mode, set the MSVC internal
- FDEV (0x40) flag to prevent _read from treating ^Z as eof (this
- could otherwise allow Emacs to hang because it then waits
- indefinitely for the child process to exit, when it might not be
- finished). */
- flags = FILE_PIPE | FILE_READ;
- if (!NILP (Vbinary_process_output))
- {
- flags |= FILE_BINARY;
- setmode (phandles[0], _O_BINARY);
- }
-#if (_MSC_VER == 900)
- else
- _osfile[phandles[0]] |= 0x40;
-#endif
-
+ flags = FILE_PIPE | FILE_READ | FILE_BINARY;
fd_info[phandles[0]].flags = flags;
- flags = FILE_PIPE | FILE_WRITE;
- if (!NILP (Vbinary_process_input))
- {
- flags |= FILE_BINARY;
- setmode (phandles[1], _O_BINARY);
- }
-#if (_MSC_VER == 900)
- else
- _osfile[phandles[1]] |= 0x40;
-#endif
-
+ flags = FILE_PIPE | FILE_WRITE | FILE_BINARY;
fd_info[phandles[1]].flags = flags;
}
return rc;
}
+/* From ntproc.c */
+extern Lisp_Object Vw32_pipe_read_delay;
+
/* Function to do blocking read of one byte, needed to implement
select. It is only allowed on sockets and pipes. */
int
cp->status = STATUS_READ_IN_PROGRESS;
if (fd_info[fd].flags & FILE_PIPE)
- /* Use read to get CRLF translation */
- rc = _read (fd, &cp->chr, sizeof (char));
+ {
+ rc = _read (fd, &cp->chr, sizeof (char));
+
+ /* Give subprocess time to buffer some more output for us before
+ reporting that input is available; we need this because Windows 95
+ connects DOS programs to pipes by making the pipe appear to be
+ the normal console stdout - as a result most DOS programs will
+ write to stdout without buffering, ie. one character at a
+ time. Even some W32 programs do this - "dir" in a command
+ shell on NT is very slow if we don't do this. */
+ if (rc > 0)
+ {
+ int wait = XINT (Vw32_pipe_read_delay);
+
+ if (wait > 0)
+ Sleep (wait);
+ else if (wait < 0)
+ while (++wait <= 0)
+ /* Yield remainder of our time slice, effectively giving a
+ temporary priority boost to the child process. */
+ Sleep (0);
+ }
+ }
#ifdef HAVE_SOCKETS
else if (fd_info[fd].flags & FILE_SOCKET)
rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0);
sys_read (int fd, char * buffer, unsigned int count)
{
int nchars;
- int extra = 0;
int to_read;
DWORD waiting;
+ char * orig_buffer = buffer;
if (fd < 0 || fd >= MAXDESC)
{
return -1;
}
+ nchars = 0;
+
+ /* re-read CR carried over from last read */
+ if (fd_info[fd].flags & FILE_LAST_CR)
+ {
+ if (fd_info[fd].flags & FILE_BINARY) abort ();
+ *buffer++ = 0x0d;
+ count--;
+ nchars++;
+ fd_info[fd].flags &= ~FILE_LAST_CR;
+ }
+
/* presence of a child_process structure means we are operating in
non-blocking mode - otherwise we just call _read directly.
Note that the child_process structure might be missing because
{
case STATUS_READ_FAILED:
case STATUS_READ_ERROR:
- /* report normal EOF */
- return 0;
+ /* report normal EOF if nothing in buffer */
+ if (nchars <= 0)
+ fd_info[fd].flags |= FILE_AT_EOF;
+ return nchars;
case STATUS_READ_READY:
case STATUS_READ_IN_PROGRESS:
/* consume read-ahead char */
*buffer++ = cp->chr;
count--;
- extra = 1;
+ nchars++;
cp->status = STATUS_READ_ACKNOWLEDGED;
ResetEvent (cp->char_avail);
{
PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL);
to_read = min (waiting, (DWORD) count);
-
- /* Use read to get CRLF translation */
- nchars = _read (fd, buffer, to_read);
+
+ if (to_read > 0)
+ nchars += _read (fd, buffer, to_read);
}
#ifdef HAVE_SOCKETS
else /* FILE_SOCKET */
{
- if (!have_winsock) abort ();
+ if (winsock_lib == NULL) abort ();
/* do the equivalent of a non-blocking read */
pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting);
- if (waiting == 0 && extra == 0)
+ if (waiting == 0 && nchars == 0)
{
h_errno = errno = EWOULDBLOCK;
return -1;
}
- nchars = 0;
if (waiting)
{
/* always use binary mode for sockets */
- nchars = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0);
- if (nchars == SOCKET_ERROR)
+ int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0);
+ if (res == SOCKET_ERROR)
{
DebPrint(("sys_read.recv failed with error %d on socket %ld\n",
pfn_WSAGetLastError (), SOCK_HANDLE (fd)));
- if (extra == 0)
- {
- set_errno ();
- return -1;
- }
- nchars = 0;
+ set_errno ();
+ return -1;
}
+ nchars += res;
}
}
#endif
}
else
- nchars = _read (fd, buffer, count);
+ {
+ int nread = _read (fd, buffer, count);
+ if (nread >= 0)
+ nchars += nread;
+ else if (nchars == 0)
+ nchars = nread;
+ }
+
+ if (nchars <= 0)
+ fd_info[fd].flags |= FILE_AT_EOF;
+ /* Perform text mode translation if required. */
+ else if ((fd_info[fd].flags & FILE_BINARY) == 0)
+ {
+ nchars = crlf_to_lf (nchars, orig_buffer);
+ /* If buffer contains only CR, return that. To be absolutely
+ sure we should attempt to read the next char, but in
+ practice a CR to be followed by LF would not appear by
+ itself in the buffer. */
+ if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d)
+ {
+ fd_info[fd].flags |= FILE_LAST_CR;
+ nchars--;
+ }
+ }
}
else
nchars = _read (fd, buffer, count);
- return nchars + extra;
+ return nchars;
}
/* For now, don't bother with a non-blocking mode */
}
if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET))
- if ((fd_info[fd].flags & FILE_WRITE) == 0)
- {
- errno = EBADF;
- return -1;
- }
+ {
+ if ((fd_info[fd].flags & FILE_WRITE) == 0)
+ {
+ errno = EBADF;
+ return -1;
+ }
+
+ /* Perform text mode translation if required. */
+ if ((fd_info[fd].flags & FILE_BINARY) == 0)
+ {
+ char * tmpbuf = alloca (count * 2);
+ unsigned char * src = (void *)buffer;
+ unsigned char * dst = tmpbuf;
+ int nbytes = count;
+
+ while (1)
+ {
+ unsigned char *next;
+ /* copy next line or remaining bytes */
+ next = _memccpy (dst, src, '\n', nbytes);
+ if (next)
+ {
+ /* copied one line ending with '\n' */
+ int copied = next - dst;
+ nbytes -= copied;
+ src += copied;
+ /* insert '\r' before '\n' */
+ next[-1] = '\r';
+ next[0] = '\n';
+ dst = next + 1;
+ count++;
+ }
+ else
+ /* copied remaining partial line -> now finished */
+ break;
+ }
+ buffer = tmpbuf;
+ }
+ }
+
#ifdef HAVE_SOCKETS
if (fd_info[fd].flags & FILE_SOCKET)
{
- if (!have_winsock) abort ();
+ if (winsock_lib == NULL) abort ();
nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0);
if (nchars == SOCKET_ERROR)
{
return nchars;
}
+static void
+check_windows_init_file ()
+{
+ extern int noninteractive, inhibit_window_system;
+
+ /* A common indication that Emacs is not installed properly is when
+ it cannot find the Windows installation file. If this file does
+ not exist in the expected place, tell the user. */
+
+ if (!noninteractive && !inhibit_window_system)
+ {
+ extern Lisp_Object Vwindow_system, Vload_path, Qfile_exists_p;
+ Lisp_Object objs[2];
+ Lisp_Object full_load_path;
+ Lisp_Object init_file;
+ int fd;
+
+ objs[0] = Vload_path;
+ objs[1] = decode_env_path (0, (getenv ("EMACSLOADPATH")));
+ full_load_path = Fappend (2, objs);
+ init_file = build_string ("term/w32-win");
+ fd = openp (full_load_path, init_file, ".el:.elc", NULL, 0);
+ if (fd < 0)
+ {
+ Lisp_Object load_path_print = Fprin1_to_string (full_load_path, Qnil);
+ char *init_file_name = XSTRING (init_file)->data;
+ char *load_path = XSTRING (load_path_print)->data;
+ char *buffer = alloca (1024);
+
+ sprintf (buffer,
+ "The Emacs Windows initialization file \"%s.el\" "
+ "could not be found in your Emacs installation. "
+ "Emacs checked the following directories for this file:\n"
+ "\n%s\n\n"
+ "When Emacs cannot find this file, it usually means that it "
+ "was not installed properly, or its distribution file was "
+ "not unpacked properly.\nSee the README.W32 file in the "
+ "top-level Emacs directory for more information.",
+ init_file_name, load_path);
+ MessageBox (NULL,
+ buffer,
+ "Emacs Abort Dialog",
+ MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL);
+ /* Use the low-level Emacs abort. */
+#undef abort
+ abort ();
+ }
+ else
+ {
+ close (fd);
+ }
+ }
+}
void
term_ntproc ()
init_ntproc ()
{
#ifdef HAVE_SOCKETS
- /* initialise the socket interface if available */
- init_winsock ();
+ /* Initialise the socket interface now if available and requested by
+ the user by defining PRELOAD_WINSOCK; otherwise loading will be
+ delayed until open-network-stream is called (w32-has-winsock can
+ also be used to dynamically load or reload winsock).
+
+ Conveniently, init_environment is called before us, so
+ PRELOAD_WINSOCK can be set in the registry. */
+
+ /* Always initialize this correctly. */
+ winsock_lib = NULL;
+
+ if (getenv ("PRELOAD_WINSOCK") != NULL)
+ init_winsock (TRUE);
#endif
/* Initial preparation for subprocess support: replace our standard
if (stdin_save != INVALID_HANDLE_VALUE)
_open_osfhandle ((long) stdin_save, O_TEXT);
else
- open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY);
- fdopen (0, "r");
+ _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY);
+ _fdopen (0, "r");
if (stdout_save != INVALID_HANDLE_VALUE)
_open_osfhandle ((long) stdout_save, O_TEXT);
else
- open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
- fdopen (1, "w");
+ _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
+ _fdopen (1, "w");
if (stderr_save != INVALID_HANDLE_VALUE)
_open_osfhandle ((long) stderr_save, O_TEXT);
else
- open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
- fdopen (2, "w");
+ _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
+ _fdopen (2, "w");
}
/* unfortunately, atexit depends on implementation of malloc */
/* atexit (term_ntproc); */
signal (SIGABRT, term_ntproc);
+
+ /* determine which drives are fixed, for GetCachedVolumeInformation */
+ {
+ /* GetDriveType must have trailing backslash. */
+ char drive[] = "A:\\";
+
+ /* Loop over all possible drive letters */
+ while (*drive <= 'Z')
+ {
+ /* Record if this drive letter refers to a fixed drive. */
+ fixed_drives[DRIVE_INDEX (*drive)] =
+ (GetDriveType (drive) == DRIVE_FIXED);
+
+ (*drive)++;
+ }
+ }
+
+ /* Check to see if Emacs has been installed correctly. */
+ check_windows_init_file ();
}
/* end of nt.c */
HCoop / bpt / emacs.git / blobdiff