diff options
Diffstat (limited to 'libguile/ioext.c')
-rw-r--r-- | libguile/ioext.c | 535 |
1 files changed, 535 insertions, 0 deletions
diff --git a/libguile/ioext.c b/libguile/ioext.c new file mode 100644 index 000000000..d51b9a09d --- /dev/null +++ b/libguile/ioext.c @@ -0,0 +1,535 @@ +/* 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 <stdio.h> +#include <unistd.h> +#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" +} + |