X-Git-Url: https://git.hcoop.net/bpt/guile.git/blobdiff_plain/0f2d19dd46f83f41177f61d585732b32a866d613..8ec84fe54e0bd4f04dfb29b37beedcda066f62c9:/libguile/ioext.c?ds=sidebyside diff --git a/libguile/ioext.c b/libguile/ioext.c dissimilarity index 92% index d51b9a09d..66e32cb91 100644 --- a/libguile/ioext.c +++ b/libguile/ioext.c @@ -1,535 +1,311 @@ -/* Copyright (C) 1995 Free Software Foundation, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this software; see the file COPYING. If not, write to - * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. - * - * As a special exception, the Free Software Foundation gives permission - * for additional uses of the text contained in its release of GUILE. - * - * The exception is that, if you link the GUILE library with other files - * to produce an executable, this does not by itself cause the - * resulting executable to be covered by the GNU General Public License. - * Your use of that executable is in no way restricted on account of - * linking the GUILE library code into it. - * - * This exception does not however invalidate any other reasons why - * the executable file might be covered by the GNU General Public License. - * - * This exception applies only to the code released by the - * Free Software Foundation under the name GUILE. If you copy - * code from other Free Software Foundation releases into a copy of - * GUILE, as the General Public License permits, the exception does - * not apply to the code that you add in this way. To avoid misleading - * anyone as to the status of such modified files, you must delete - * this exception notice from them. - * - * If you write modifications of your own for GUILE, it is your choice - * whether to permit this exception to apply to your modifications. - * If you do not wish that, delete this exception notice. - */ - - - -#include -#include -#include "fd.h" -#include "_scm.h" - - - -SCM_PROC (s_sys_ftell, "%ftell", 1, 0, 0, scm_sys_ftell); -#ifdef __STDC__ -SCM -scm_sys_ftell (SCM port) -#else -SCM -scm_sys_ftell (port) - SCM port; -#endif -{ - long pos; - SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_ftell); - SCM_SYSCALL (pos = ftell ((FILE *)SCM_STREAM (port))); - if (pos < 0) - return SCM_BOOL_F; - if (pos > 0 && SCM_CRDYP (port)) - pos--; - return SCM_MAKINUM (pos); -} - - - -SCM_PROC (s_sys_fseek, "%fseek", 3, 0, 0, scm_sys_fseek); -#ifdef __STDC__ -SCM -scm_sys_fseek (SCM port, SCM offset, SCM whence) -#else -SCM -scm_sys_fseek (port, offset, whence) - SCM port; - SCM offset; - SCM whence; -#endif -{ - int rv; - SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_fseek); - SCM_ASSERT (SCM_INUMP (offset), offset, SCM_ARG2, s_sys_fseek); - SCM_ASSERT (SCM_INUMP (whence) && (SCM_INUM (whence) < 3) && (SCM_INUM (whence) >= 0), - whence, SCM_ARG3, s_sys_fseek); - SCM_CLRDY (port); /* Clear ungetted char */ - /* Values of whence are interned in scm_init_ioext. */ - rv = fseek ((FILE *)SCM_STREAM (port), SCM_INUM (offset), SCM_INUM (whence)); - return rv ? SCM_MAKINUM (errno) : SCM_BOOL_T; -} - - - -SCM_PROC (s_sys_freopen, "%freopen", 3, 0, 0, scm_sys_freopen); -#ifdef __STDC__ -SCM -scm_sys_freopen (SCM filename, SCM modes, SCM port) -#else -SCM -scm_sys_freopen (filename, modes, port) - SCM filename; - SCM modes; - SCM port; -#endif -{ - FILE *f; - SCM_ASSERT (SCM_NIMP (filename) && SCM_STRINGP (filename), filename, SCM_ARG1, s_sys_freopen); - SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_freopen); - SCM_DEFER_INTS; - SCM_ASSERT (SCM_NIMP (port) && SCM_FPORTP (port), port, SCM_ARG3, s_sys_freopen); - SCM_SYSCALL (f = freopen (SCM_CHARS (filename), SCM_CHARS (modes), (FILE *)SCM_STREAM (port))); - if (!f) - { - SCM p; - p = port; - port = SCM_MAKINUM (errno); - SCM_CAR (p) &= ~SCM_OPN; - scm_remove_from_port_table (p); - } - else - { - SCM_CAR (port) = scm_tc16_fport | scm_mode_bits (SCM_CHARS (modes)); - SCM_SETSTREAM (port, (SCM)f); - if (SCM_BUF0 & (SCM_CAR (port) = scm_tc16_fport | scm_mode_bits (SCM_CHARS (modes)))) - scm_setbuf0 (port); - } - SCM_ALLOW_INTS; - return port; -} - - - -SCM_PROC (s_sys_duplicate_port, "%duplicate-port", 2, 0, 0, scm_sys_duplicate_port); -#ifdef __STDC__ -SCM -scm_sys_duplicate_port (SCM oldpt, SCM modes) -#else -SCM -scm_sys_duplicate_port (oldpt, modes) - SCM oldpt; - SCM modes; -#endif -{ - int oldfd; - int newfd; - FILE *f; - SCM newpt; - SCM_ASSERT (SCM_NIMP (oldpt) && SCM_OPPORTP (oldpt), oldpt, SCM_ARG1, s_sys_duplicate_port); - SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_duplicate_port); - SCM_NEWCELL (newpt); - SCM_DEFER_INTS; - oldfd = fileno ((FILE *)SCM_STREAM (oldpt)); - if (oldfd == -1) - { - SCM_ALLOW_INTS; - return SCM_BOOL_F; - }; - SCM_SYSCALL (newfd = dup (oldfd)); - if (newfd == -1) - { - SCM_ALLOW_INTS; - return SCM_BOOL_F; - }; - f = fdopen (newfd, SCM_CHARS (modes)); - if (!f) - { - SCM_SYSCALL (close (newfd)); - SCM_ALLOW_INTS; - return SCM_BOOL_F; - } - { - struct scm_port_table * pt; - pt = scm_add_to_port_table (newpt); - SCM_SETPTAB_ENTRY (newpt, pt); - if (SCM_BUF0 & (SCM_CAR (newpt) = scm_tc16_fport | scm_mode_bits (SCM_CHARS (modes)))) - scm_setbuf0 (newpt); - SCM_SETSTREAM (newpt, (SCM)f); - SCM_PTAB_ENTRY (newpt)->file_name = SCM_PTAB_ENTRY (oldpt)->file_name; - } - SCM_ALLOW_INTS; - return newpt; -} - - - -SCM_PROC (s_sys_redirect_port, "%redirect-port", 2, 0, 0, scm_sys_redirect_port); -#ifdef __STDC__ -SCM -scm_sys_redirect_port (SCM into_pt, SCM from_pt) -#else -SCM -scm_sys_redirect_port (into_pt, from_pt) - SCM into_pt; - SCM from_pt; -#endif -{ - int ans, oldfd, newfd; - SCM_DEFER_INTS; - SCM_ASSERT (SCM_NIMP (into_pt) && SCM_OPPORTP (into_pt), into_pt, SCM_ARG1, s_sys_redirect_port); - SCM_ASSERT (SCM_NIMP (from_pt) && SCM_OPPORTP (from_pt), from_pt, SCM_ARG2, s_sys_redirect_port); - oldfd = fileno ((FILE *)SCM_STREAM (into_pt)); - newfd = fileno ((FILE *)SCM_STREAM (from_pt)); - if (oldfd == -1 || newfd == -1) - ans = -1; - else - SCM_SYSCALL (ans = dup2 (oldfd, newfd)); - SCM_ALLOW_INTS; - return (ans == -1) ? SCM_MAKINUM (errno) : SCM_BOOL_T; -} - -SCM_PROC (s_sys_fileno, "%fileno", 1, 0, 0, scm_sys_fileno); -#ifdef __STDC__ -SCM -scm_sys_fileno (SCM port) -#else -SCM -scm_sys_fileno (port) - SCM port; -#endif -{ - int fd; - SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_fileno); - fd = fileno ((FILE *)SCM_STREAM (port)); - return (fd == -1) ? SCM_BOOL_F : SCM_MAKINUM (fd); -} - - -SCM_PROC (s_sys_soft_fileno, "%soft-fileno", 1, 0, 0, scm_sys_soft_fileno); -#ifdef __STDC__ -SCM -scm_sys_soft_fileno (SCM port) -#else -SCM -scm_sys_soft_fileno (port) - SCM port; -#endif -{ - int fd; - SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port), port, SCM_ARG1, s_sys_fileno); - - if (!SCM_OPFPORTP (port)) - return SCM_BOOL_F; - - fd = fileno ((FILE *)SCM_STREAM (port)); - return (fd == -1) ? SCM_BOOL_F : SCM_MAKINUM (fd); -} - - - -SCM_PROC (s_sys_isatty, "%isatty?", 1, 0, 0, scm_sys_isatty_p); -#ifdef __STDC__ -SCM -scm_sys_isatty_p (SCM port) -#else -SCM -scm_sys_isatty_p (port) - SCM port; -#endif -{ - int rv; - SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_isatty); - rv = fileno ((FILE *)SCM_STREAM (port)); - if (rv == -1) - return SCM_MAKINUM (errno); - else - { - rv = isatty (rv); - return rv ? SCM_BOOL_T : SCM_BOOL_F; - } -} - - - -SCM_PROC (s_sys_fdopen, "%fdopen", 2, 0, 0, scm_sys_fdopen); -#ifdef __STDC__ -SCM -scm_sys_fdopen (SCM fdes, SCM modes) -#else -SCM -scm_sys_fdopen (fdes, modes) - SCM fdes; - SCM modes; -#endif -{ - FILE *f; - SCM port; - - SCM_ASSERT (SCM_INUMP (fdes), fdes, SCM_ARG1, s_sys_fdopen); - SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_fdopen); - SCM_DEFER_INTS; - f = fdopen (SCM_INUM (fdes), SCM_CHARS (modes)); - if (f == NULL) - { - SCM_ALLOW_INTS; - return SCM_MAKINUM (errno); - } - SCM_NEWCELL (port); - SCM_CAR (port) = scm_tc16_fport | scm_mode_bits (SCM_CHARS (modes)); - SCM_SETSTREAM (port,(SCM)f); - scm_add_to_port_table (port); - SCM_ALLOW_INTS; - return port; -} - - - -/* Move a port's underlying file descriptor to a given value. - * Returns: #f for error. - * 0 if fdes is already the given value. - * 1 if fdes moved. - * MOVE->FDES is implemented in Scheme and calls this primitive. - */ -SCM_PROC (s_sys_primitive_move_to_fdes, "%primitive-move->fdes", 2, 0, 0, scm_sys_primitive_move_to_fdes); -#ifdef __STDC__ -SCM -scm_sys_primitive_move_to_fdes (SCM port, SCM fd) -#else -SCM -scm_sys_primitive_move_to_fdes (port, fd) - SCM port; - SCM fd; -#endif -{ - FILE *stream; - int old_fd; - int new_fd; - int rv; - - SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_primitive_move_to_fdes); - SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG2, s_sys_primitive_move_to_fdes); - SCM_DEFER_INTS; - stream = (FILE *)SCM_STREAM (port); - old_fd = fileno (stream); - new_fd = SCM_INUM (fd); - if (old_fd == new_fd) - { - SCM_ALLOW_INTS; - return SCM_MAKINUM (0); - } - scm_evict_ports (new_fd); - rv = dup2 (old_fd, new_fd); - if (rv == -1) - { - SCM_ALLOW_INTS; - return SCM_BOOL_F; - } - scm_setfileno (stream, new_fd); - SCM_SYSCALL (close (old_fd)); - SCM_ALLOW_INTS; - return SCM_MAKINUM (1); -} - - - -/* FIXME */ -#ifdef __STDC__ -void -scm_setfileno (FILE *fs, int fd) -#else -void -scm_setfileno (fs, fd) - FILE *fs; - int fd; -#endif -{ -#ifdef SET_FILE_FD_FIELD - SET_FILE_FD_FIELD(fs, fd); -#else - Configure could not guess the name of the correct field in a FILE *. - - This function needs to be ported to your system. - - SET_FILE_FD_FIELD should change the descriptor refered to by a stdio - stream, and nothing else. - - The way to port this file is to add cases to configure.in. Search - that file for "SET_FILE_FD_FIELD" and follow the examples there. -#endif -} - -/* Move ports with the specified file descriptor to new descriptors, - * reseting the revealed count to 0. - * Should be called with SCM_DEFER_INTS active. - */ -#ifdef __STDC__ -void -scm_evict_ports (int fd) -#else -void -scm_evict_ports (fd) - int fd; -#endif -{ - int i; - - for (i = 0; i < scm_port_table_size; i++) - { - if (SCM_FPORTP (scm_port_table[i]->port) - && fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == fd) - { - scm_setfileno ((FILE *)SCM_STREAM (scm_port_table[i]->port), dup (fd)); - scm_set_port_revealed_x (scm_port_table[i]->port, SCM_MAKINUM (0)); - } - } -} - -/* Return a list of ports using a given file descriptor. */ -SCM_PROC(s_fdes_to_ports, "fdes->ports", 1, 0, 0, scm_fdes_to_ports); -#ifdef __STDC__ -SCM -scm_fdes_to_ports (SCM fd) -#else -SCM -scm_fdes_to_ports (fd) - SCM fd; -#endif -{ - SCM result = SCM_EOL; - int int_fd; - int i; - - SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG1, s_fdes_to_ports); - int_fd = SCM_INUM (fd); - - SCM_DEFER_INTS; - for (i = 0; i < scm_port_table_size; i++) - { - if (SCM_FPORTP (scm_port_table[i]->port) - && fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == int_fd) - result = scm_cons (scm_port_table[i]->port, result); - } - SCM_ALLOW_INTS; - return result; -} - -#ifdef __STDC__ -void -scm_init_ioext (void) -#else -void -scm_init_ioext () -#endif -{ - /* fseek() symbols. */ - scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET)); - scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR)); - scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END)); - - /* access() symbols. */ - scm_sysintern ("R_OK", SCM_MAKINUM (R_OK)); - scm_sysintern ("W_OK", SCM_MAKINUM (W_OK)); - scm_sysintern ("X_OK", SCM_MAKINUM (X_OK)); - scm_sysintern ("F_OK", SCM_MAKINUM (F_OK)); - - /* File type/permission bits. */ -#ifdef S_IRUSR - scm_sysintern ("S_IRUSR", SCM_MAKINUM (S_IRUSR)); -#endif -#ifdef S_IWUSR - scm_sysintern ("S_IWUSR", SCM_MAKINUM (S_IWUSR)); -#endif -#ifdef S_IXUSR - scm_sysintern ("S_IXUSR", SCM_MAKINUM (S_IXUSR)); -#endif -#ifdef S_IRWXU - scm_sysintern ("S_IRWXU", SCM_MAKINUM (S_IRWXU)); -#endif - -#ifdef S_IRGRP - scm_sysintern ("S_IRGRP", SCM_MAKINUM (S_IRGRP)); -#endif -#ifdef S_IWGRP - scm_sysintern ("S_IWGRP", SCM_MAKINUM (S_IWGRP)); -#endif -#ifdef S_IXGRP - scm_sysintern ("S_IXGRP", SCM_MAKINUM (S_IXGRP)); -#endif -#ifdef S_IRWXG - scm_sysintern ("S_IRWXG", SCM_MAKINUM (S_IRWXG)); -#endif - -#ifdef S_IROTH - scm_sysintern ("S_IROTH", SCM_MAKINUM (S_IROTH)); -#endif -#ifdef S_IWOTH - scm_sysintern ("S_IWOTH", SCM_MAKINUM (S_IWOTH)); -#endif -#ifdef S_IXOTH - scm_sysintern ("S_IXOTH", SCM_MAKINUM (S_IXOTH)); -#endif -#ifdef S_IRWXO - scm_sysintern ("S_IRWXO", SCM_MAKINUM (S_IRWXO)); -#endif - -#ifdef S_ISUID - scm_sysintern ("S_ISUID", SCM_MAKINUM (S_ISUID)); -#endif -#ifdef S_ISGID - scm_sysintern ("S_ISGID", SCM_MAKINUM (S_ISGID)); -#endif -#ifdef S_ISVTX - scm_sysintern ("S_ISVTX", SCM_MAKINUM (S_ISVTX)); -#endif - -#ifdef S_IFMT - scm_sysintern ("S_IFMT", SCM_MAKINUM (S_IFMT)); -#endif -#ifdef S_IFDIR - scm_sysintern ("S_IFDIR", SCM_MAKINUM (S_IFDIR)); -#endif -#ifdef S_IFCHR - scm_sysintern ("S_IFCHR", SCM_MAKINUM (S_IFCHR)); -#endif -#ifdef S_IFBLK - scm_sysintern ("S_IFBLK", SCM_MAKINUM (S_IFBLK)); -#endif -#ifdef S_IFREG - scm_sysintern ("S_IFREG", SCM_MAKINUM (S_IFREG)); -#endif -#ifdef S_IFLNK - scm_sysintern ("S_IFLNK", SCM_MAKINUM (S_IFLNK)); -#endif -#ifdef S_IFSOCK - scm_sysintern ("S_IFSOCK", SCM_MAKINUM (S_IFSOCK)); -#endif -#ifdef S_IFIFO - scm_sysintern ("S_IFIFO", SCM_MAKINUM (S_IFIFO)); -#endif -#include "ioext.x" -} - +/* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc. + * + * 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 2.1 of the License, or (at your option) any later version. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + + + +#if HAVE_CONFIG_H +# include +#endif + +#include +#include + +#include "libguile/_scm.h" +#include "libguile/ioext.h" +#include "libguile/fports.h" +#include "libguile/feature.h" +#include "libguile/ports.h" +#include "libguile/strings.h" +#include "libguile/validate.h" + +#include + +#ifdef HAVE_IO_H +#include +#endif +#ifdef HAVE_UNISTD_H +#include +#endif + + +SCM_DEFINE (scm_ftell, "ftell", 1, 0, 0, + (SCM fd_port), + "Return an integer representing the current position of\n" + "@var{fd/port}, measured from the beginning. Equivalent to:\n" + "\n" + "@lisp\n" + "(seek port 0 SEEK_CUR)\n" + "@end lisp") +#define FUNC_NAME s_scm_ftell +{ + return scm_seek (fd_port, SCM_INUM0, SCM_MAKINUM (SEEK_CUR)); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_redirect_port, "redirect-port", 2, 0, 0, + (SCM old, SCM new), + "This procedure takes two ports and duplicates the underlying file\n" + "descriptor from @var{old-port} into @var{new-port}. The\n" + "current file descriptor in @var{new-port} will be closed.\n" + "After the redirection the two ports will share a file position\n" + "and file status flags.\n\n" + "The return value is unspecified.\n\n" + "Unexpected behaviour can result if both ports are subsequently used\n" + "and the original and/or duplicate ports are buffered.\n\n" + "This procedure does not have any side effects on other ports or\n" + "revealed counts.") +#define FUNC_NAME s_scm_redirect_port +{ + int ans, oldfd, newfd; + scm_t_fport *fp; + + old = SCM_COERCE_OUTPORT (old); + new = SCM_COERCE_OUTPORT (new); + + SCM_VALIDATE_OPFPORT (1, old); + SCM_VALIDATE_OPFPORT (2, new); + oldfd = SCM_FPORT_FDES (old); + fp = SCM_FSTREAM (new); + newfd = fp->fdes; + if (oldfd != newfd) + { + scm_t_port *pt = SCM_PTAB_ENTRY (new); + scm_t_port *old_pt = SCM_PTAB_ENTRY (old); + scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (new)]; + + /* must flush to old fdes. */ + if (pt->rw_active == SCM_PORT_WRITE) + ptob->flush (new); + else if (pt->rw_active == SCM_PORT_READ) + scm_end_input (new); + ans = dup2 (oldfd, newfd); + if (ans == -1) + SCM_SYSERROR; + pt->rw_random = old_pt->rw_random; + /* continue using existing buffers, even if inappropriate. */ + } + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_dup_to_fdes, "dup->fdes", 1, 1, 0, + (SCM fd_or_port, SCM fd), + "Return a new integer file descriptor referring to the open file\n" + "designated by @var{fd_or_port}, which must be either an open\n" + "file port or a file descriptor.") +#define FUNC_NAME s_scm_dup_to_fdes +{ + int oldfd, newfd, rv; + + fd_or_port = SCM_COERCE_OUTPORT (fd_or_port); + + if (SCM_INUMP (fd_or_port)) + oldfd = SCM_INUM (fd_or_port); + else + { + SCM_VALIDATE_OPFPORT (1, fd_or_port); + oldfd = SCM_FPORT_FDES (fd_or_port); + } + + if (SCM_UNBNDP (fd)) + { + newfd = dup (oldfd); + if (newfd == -1) + SCM_SYSERROR; + fd = SCM_MAKINUM (newfd); + } + else + { + SCM_VALIDATE_INUM_COPY (2, fd, newfd); + if (oldfd != newfd) + { + scm_evict_ports (newfd); /* see scsh manual. */ + rv = dup2 (oldfd, newfd); + if (rv == -1) + SCM_SYSERROR; + } + } + return fd; +} +#undef FUNC_NAME + + +SCM_DEFINE (scm_dup2, "dup2", 2, 0, 0, + (SCM oldfd, SCM newfd), + "A simple wrapper for the @code{dup2} system call.\n" + "Copies the file descriptor @var{oldfd} to descriptor\n" + "number @var{newfd}, replacing the previous meaning\n" + "of @var{newfd}. Both @var{oldfd} and @var{newfd} must\n" + "be integers.\n" + "Unlike for dup->fdes or primitive-move->fdes, no attempt\n" + "is made to move away ports which are using @var{newfd}.\n" + "The return value is unspecified.") +#define FUNC_NAME s_scm_dup2 +{ + int c_oldfd; + int c_newfd; + int rv; + + SCM_VALIDATE_INUM_COPY (1, oldfd, c_oldfd); + SCM_VALIDATE_INUM_COPY (2, newfd, c_newfd); + rv = dup2 (c_oldfd, c_newfd); + if (rv == -1) + SCM_SYSERROR; + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_fileno, "fileno", 1, 0, 0, + (SCM port), + "Return the integer file descriptor underlying @var{port}. Does\n" + "not change its revealed count.") +#define FUNC_NAME s_scm_fileno +{ + port = SCM_COERCE_OUTPORT (port); + SCM_VALIDATE_OPFPORT (1, port); + return SCM_MAKINUM (SCM_FPORT_FDES (port)); +} +#undef FUNC_NAME + +/* GJB:FIXME:: why does this not throw + an error if the arg is not a port? + This proc as is would be better names isattyport? + if it is not going to assume that the arg is a port + + [cmm] I don't see any problem with the above. why should a type + predicate assume _anything_ about its argument? +*/ +SCM_DEFINE (scm_isatty_p, "isatty?", 1, 0, 0, + (SCM port), + "Return @code{#t} if @var{port} is using a serial non--file\n" + "device, otherwise @code{#f}.") +#define FUNC_NAME s_scm_isatty_p +{ + int rv; + + port = SCM_COERCE_OUTPORT (port); + + if (!SCM_OPFPORTP (port)) + return SCM_BOOL_F; + + rv = isatty (SCM_FPORT_FDES (port)); + return SCM_BOOL(rv); +} +#undef FUNC_NAME + + + +SCM_DEFINE (scm_fdopen, "fdopen", 2, 0, 0, + (SCM fdes, SCM modes), + "Return a new port based on the file descriptor @var{fdes}.\n" + "Modes are given by the string @var{modes}. The revealed count\n" + "of the port is initialized to zero. The modes string is the\n" + "same as that accepted by @ref{File Ports, open-file}.") +#define FUNC_NAME s_scm_fdopen +{ + SCM_VALIDATE_INUM (1, fdes); + SCM_VALIDATE_STRING (2, modes); + + return scm_fdes_to_port (SCM_INUM (fdes), SCM_STRING_CHARS (modes), SCM_BOOL_F); +} +#undef FUNC_NAME + + + +/* Move a port's underlying file descriptor to a given value. + * Returns #f if fdes is already the given value. + * #t if fdes moved. + * MOVE->FDES is implemented in Scheme and calls this primitive. + */ +SCM_DEFINE (scm_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0, + (SCM port, SCM fd), + "Moves the underlying file descriptor for @var{port} to the integer\n" + "value @var{fdes} without changing the revealed count of @var{port}.\n" + "Any other ports already using this descriptor will be automatically\n" + "shifted to new descriptors and their revealed counts reset to zero.\n" + "The return value is @code{#f} if the file descriptor already had the\n" + "required value or @code{#t} if it was moved.") +#define FUNC_NAME s_scm_primitive_move_to_fdes +{ + scm_t_fport *stream; + int old_fd; + int new_fd; + int rv; + + port = SCM_COERCE_OUTPORT (port); + + SCM_VALIDATE_OPFPORT (1, port); + SCM_VALIDATE_INUM (2, fd); + stream = SCM_FSTREAM (port); + old_fd = stream->fdes; + new_fd = SCM_INUM (fd); + if (old_fd == new_fd) + { + return SCM_BOOL_F; + } + scm_evict_ports (new_fd); + rv = dup2 (old_fd, new_fd); + if (rv == -1) + SCM_SYSERROR; + stream->fdes = new_fd; + SCM_SYSCALL (close (old_fd)); + return SCM_BOOL_T; +} +#undef FUNC_NAME + +/* Return a list of ports using a given file descriptor. */ +SCM_DEFINE (scm_fdes_to_ports, "fdes->ports", 1, 0, 0, + (SCM fd), + "Return a list of existing ports which have @var{fdes} as an\n" + "underlying file descriptor, without changing their revealed\n" + "counts.") +#define FUNC_NAME s_scm_fdes_to_ports +{ + SCM result = SCM_EOL; + int int_fd; + long i; + + SCM_VALIDATE_INUM_COPY (1, fd, int_fd); + + scm_mutex_lock (&scm_i_port_table_mutex); + for (i = 0; i < scm_i_port_table_size; i++) + { + if (SCM_OPFPORTP (scm_i_port_table[i]->port) + && ((scm_t_fport *) scm_i_port_table[i]->stream)->fdes == int_fd) + result = scm_cons (scm_i_port_table[i]->port, result); + } + scm_mutex_unlock (&scm_i_port_table_mutex); + return result; +} +#undef FUNC_NAME + + +void +scm_init_ioext () +{ + scm_add_feature ("i/o-extensions"); + +#include "libguile/ioext.x" +} + + +/* + Local Variables: + c-file-style: "gnu" + End: +*/