[bpt/guile.git] / libguile / ioext.c

/*	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.  
 */
\f


#include <stdio.h>
#include "fd.h"
#include "_scm.h"

#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
\f

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)
    SCM_SYSERROR (s_sys_ftell);
  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));
  if (rv != 0)
    SCM_SYSERROR (s_sys_fseek);
  return SCM_UNSPECIFIED;
}


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_SYSERROR (s_sys_duplicate_port);
  SCM_SYSCALL (newfd = dup (oldfd));
  if (newfd == -1)
    SCM_SYSERROR (s_sys_duplicate_port);
  f = fdopen (newfd, SCM_CHARS (modes));
  if (!f)
    {
      SCM_SYSCALL (close (newfd));
      SCM_SYSERROR (s_sys_duplicate_port);
    }
  {
    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));
  if (oldfd == -1)
    SCM_SYSERROR (s_sys_redirect_port);
  newfd = fileno ((FILE *)SCM_STREAM (from_pt));
  if (newfd == -1)
    SCM_SYSERROR (s_sys_redirect_port);
  SCM_SYSCALL (ans = dup2 (oldfd, newfd));
  if (ans == -1)
    SCM_SYSERROR (s_sys_redirect_port);
  SCM_ALLOW_INTS;
  return SCM_UNSPECIFIED;
}

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));
  if (fd == -1)
    SCM_SYSERROR (s_sys_fileno);
  return 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)
    SCM_SYSERROR (s_sys_isatty);
  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;
  struct scm_port_table * pt;

  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_NEWCELL (port);
  SCM_DEFER_INTS;
  f = fdopen (SCM_INUM (fdes), SCM_CHARS (modes));
  if (f == NULL)
    SCM_SYSERROR (s_sys_fdopen);
  pt = scm_add_to_port_table (port);
  SCM_SETPTAB_ENTRY (port, pt);
  if (SCM_BUF0 & (SCM_CAR (port) = scm_tc16_fport
		  | scm_mode_bits (SCM_CHARS (modes))))
    scm_setbuf0 (port);
  SCM_SETSTREAM (port, (SCM)f);
  SCM_ALLOW_INTS;
  return port;
}


/* 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_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_BOOL_F;
    }
  scm_evict_ports (new_fd);
  rv = dup2 (old_fd, new_fd);
  if (rv == -1)
    SCM_SYSERROR (s_sys_primitive_move_to_fdes);
  scm_setfileno (stream, new_fd);
  SCM_SYSCALL (close (old_fd));  
  SCM_ALLOW_INTS;
  return SCM_BOOL_T;
}

#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"
}
Commit	Line	Data
0f2d19dd JB	1	/* Copyright (C) 1995 Free Software Foundation, Inc.
	2	*
	3	* This program is free software; you can redistribute it and/or modify
	4	* it under the terms of the GNU General Public License as published by
	5	* the Free Software Foundation; either version 2, or (at your option)
	6	* any later version.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this software; see the file COPYING. If not, write to
	15	* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
	16	*
	17	* As a special exception, the Free Software Foundation gives permission
	18	* for additional uses of the text contained in its release of GUILE.
	19	*
	20	* The exception is that, if you link the GUILE library with other files
	21	* to produce an executable, this does not by itself cause the
	22	* resulting executable to be covered by the GNU General Public License.
	23	* Your use of that executable is in no way restricted on account of
	24	* linking the GUILE library code into it.
	25	*
	26	* This exception does not however invalidate any other reasons why
	27	* the executable file might be covered by the GNU General Public License.
	28	*
	29	* This exception applies only to the code released by the
	30	* Free Software Foundation under the name GUILE. If you copy
	31	* code from other Free Software Foundation releases into a copy of
	32	* GUILE, as the General Public License permits, the exception does
	33	* not apply to the code that you add in this way. To avoid misleading
	34	* anyone as to the status of such modified files, you must delete
	35	* this exception notice from them.
	36	*
	37	* If you write modifications of your own for GUILE, it is your choice
	38	* whether to permit this exception to apply to your modifications.
	39	* If you do not wish that, delete this exception notice.
	40	*/
	41	\f
	42
	43
	44	#include <stdio.h>
0f2d19dd JB	45	#include "fd.h"
	46	#include "_scm.h"
	47
95b88819 GH	48	#ifdef HAVE_STRING_H
	49	#include <string.h>
	50	#endif
	51	#ifdef HAVE_UNISTD_H
	52	#include <unistd.h>
	53	#endif
0f2d19dd JB	54	\f
0f2d19dd JB	55
02b754d3	56	SCM_PROC (s_sys_ftell, "ftell", 1, 0, 0, scm_sys_ftell);
0f2d19dd JB	57	#ifdef __STDC__
	58	SCM
	59	scm_sys_ftell (SCM port)
	60	#else
	61	SCM
	62	scm_sys_ftell (port)
	63	SCM port;
	64	#endif
	65	{
	66	long pos;
	67	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_ftell);
	68	SCM_SYSCALL (pos = ftell ((FILE *)SCM_STREAM (port)));
	69	if (pos < 0)
02b754d3	70	SCM_SYSERROR (s_sys_ftell);
0f2d19dd JB	71	if (pos > 0 && SCM_CRDYP (port))
	72	pos--;
	73	return SCM_MAKINUM (pos);
	74	}
	75
	76
	77
02b754d3	78	SCM_PROC (s_sys_fseek, "fseek", 3, 0, 0, scm_sys_fseek);
0f2d19dd JB	79	#ifdef __STDC__
	80	SCM
	81	scm_sys_fseek (SCM port, SCM offset, SCM whence)
	82	#else
	83	SCM
	84	scm_sys_fseek (port, offset, whence)
	85	SCM port;
	86	SCM offset;
	87	SCM whence;
	88	#endif
	89	{
	90	int rv;
	91	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_fseek);
	92	SCM_ASSERT (SCM_INUMP (offset), offset, SCM_ARG2, s_sys_fseek);
	93	SCM_ASSERT (SCM_INUMP (whence) && (SCM_INUM (whence) < 3) && (SCM_INUM (whence) >= 0),
	94	whence, SCM_ARG3, s_sys_fseek);
	95	SCM_CLRDY (port); /* Clear ungetted char */
	96	/* Values of whence are interned in scm_init_ioext. */
	97	rv = fseek ((FILE *)SCM_STREAM (port), SCM_INUM (offset), SCM_INUM (whence));
02b754d3 GH	98	if (rv != 0)
	99	SCM_SYSERROR (s_sys_fseek);
	100	return SCM_UNSPECIFIED;
0f2d19dd JB	101	}
	102
	103
	104
02b754d3	105	SCM_PROC (s_sys_freopen, "freopen", 3, 0, 0, scm_sys_freopen);
0f2d19dd JB	106	#ifdef __STDC__
	107	SCM
	108	scm_sys_freopen (SCM filename, SCM modes, SCM port)
	109	#else
	110	SCM
	111	scm_sys_freopen (filename, modes, port)
	112	SCM filename;
	113	SCM modes;
	114	SCM port;
	115	#endif
	116	{
	117	FILE *f;
	118	SCM_ASSERT (SCM_NIMP (filename) && SCM_STRINGP (filename), filename, SCM_ARG1, s_sys_freopen);
	119	SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_freopen);
	120	SCM_DEFER_INTS;
	121	SCM_ASSERT (SCM_NIMP (port) && SCM_FPORTP (port), port, SCM_ARG3, s_sys_freopen);
	122	SCM_SYSCALL (f = freopen (SCM_CHARS (filename), SCM_CHARS (modes), (FILE *)SCM_STREAM (port)));
	123	if (!f)
	124	{
	125	SCM p;
	126	p = port;
	127	port = SCM_MAKINUM (errno);
	128	SCM_CAR (p) &= ~SCM_OPN;
	129	scm_remove_from_port_table (p);
	130	}
	131	else
	132	{
	133	SCM_CAR (port) = scm_tc16_fport \| scm_mode_bits (SCM_CHARS (modes));
	134	SCM_SETSTREAM (port, (SCM)f);
	135	if (SCM_BUF0 & (SCM_CAR (port) = scm_tc16_fport \| scm_mode_bits (SCM_CHARS (modes))))
	136	scm_setbuf0 (port);
	137	}
	138	SCM_ALLOW_INTS;
	139	return port;
	140	}
	141
	142
	143
02b754d3	144	SCM_PROC (s_sys_duplicate_port, "duplicate-port", 2, 0, 0, scm_sys_duplicate_port);
0f2d19dd JB	145	#ifdef __STDC__
	146	SCM
	147	scm_sys_duplicate_port (SCM oldpt, SCM modes)
	148	#else
	149	SCM
	150	scm_sys_duplicate_port (oldpt, modes)
	151	SCM oldpt;
	152	SCM modes;
	153	#endif
	154	{
	155	int oldfd;
	156	int newfd;
	157	FILE *f;
	158	SCM newpt;
	159	SCM_ASSERT (SCM_NIMP (oldpt) && SCM_OPPORTP (oldpt), oldpt, SCM_ARG1, s_sys_duplicate_port);
	160	SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_duplicate_port);
	161	SCM_NEWCELL (newpt);
	162	SCM_DEFER_INTS;
	163	oldfd = fileno ((FILE *)SCM_STREAM (oldpt));
	164	if (oldfd == -1)
02b754d3	165	SCM_SYSERROR (s_sys_duplicate_port);
0f2d19dd JB	166	SCM_SYSCALL (newfd = dup (oldfd));
0f2d19dd JB	167	if (newfd == -1)
02b754d3	168	SCM_SYSERROR (s_sys_duplicate_port);
0f2d19dd JB	169	f = fdopen (newfd, SCM_CHARS (modes));
	170	if (!f)
	171	{
	172	SCM_SYSCALL (close (newfd));
02b754d3	173	SCM_SYSERROR (s_sys_duplicate_port);
0f2d19dd JB	174	}
	175	{
	176	struct scm_port_table * pt;
	177	pt = scm_add_to_port_table (newpt);
	178	SCM_SETPTAB_ENTRY (newpt, pt);
	179	if (SCM_BUF0 & (SCM_CAR (newpt) = scm_tc16_fport \| scm_mode_bits (SCM_CHARS (modes))))
	180	scm_setbuf0 (newpt);
	181	SCM_SETSTREAM (newpt, (SCM)f);
	182	SCM_PTAB_ENTRY (newpt)->file_name = SCM_PTAB_ENTRY (oldpt)->file_name;
	183	}
	184	SCM_ALLOW_INTS;
	185	return newpt;
	186	}
	187
	188
	189
02b754d3	190	SCM_PROC (s_sys_redirect_port, "redirect-port", 2, 0, 0, scm_sys_redirect_port);
0f2d19dd JB	191	#ifdef __STDC__
	192	SCM
	193	scm_sys_redirect_port (SCM into_pt, SCM from_pt)
	194	#else
	195	SCM
	196	scm_sys_redirect_port (into_pt, from_pt)
	197	SCM into_pt;
	198	SCM from_pt;
	199	#endif
	200	{
	201	int ans, oldfd, newfd;
	202	SCM_DEFER_INTS;
	203	SCM_ASSERT (SCM_NIMP (into_pt) && SCM_OPPORTP (into_pt), into_pt, SCM_ARG1, s_sys_redirect_port);
	204	SCM_ASSERT (SCM_NIMP (from_pt) && SCM_OPPORTP (from_pt), from_pt, SCM_ARG2, s_sys_redirect_port);
	205	oldfd = fileno ((FILE *)SCM_STREAM (into_pt));
02b754d3 GH	206	if (oldfd == -1)
02b754d3 GH	207	SCM_SYSERROR (s_sys_redirect_port);
0f2d19dd	208	newfd = fileno ((FILE *)SCM_STREAM (from_pt));
02b754d3 GH	209	if (newfd == -1)
	210	SCM_SYSERROR (s_sys_redirect_port);
	211	SCM_SYSCALL (ans = dup2 (oldfd, newfd));
	212	if (ans == -1)
	213	SCM_SYSERROR (s_sys_redirect_port);
0f2d19dd	214	SCM_ALLOW_INTS;
02b754d3	215	return SCM_UNSPECIFIED;
0f2d19dd JB	216	}
0f2d19dd JB	217
8b13c6b3	218	SCM_PROC (s_sys_fileno, "fileno", 1, 0, 0, scm_sys_fileno);
0f2d19dd JB	219	#ifdef __STDC__
	220	SCM
	221	scm_sys_fileno (SCM port)
	222	#else
	223	SCM
	224	scm_sys_fileno (port)
	225	SCM port;
	226	#endif
	227	{
	228	int fd;
	229	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_fileno);
	230	fd = fileno ((FILE *)SCM_STREAM (port));
02b754d3 GH	231	if (fd == -1)
	232	SCM_SYSERROR (s_sys_fileno);
	233	return SCM_MAKINUM (fd);
0f2d19dd JB	234	}
0f2d19dd JB	235
02b754d3	236	SCM_PROC (s_sys_isatty, "isatty?", 1, 0, 0, scm_sys_isatty_p);
0f2d19dd JB	237	#ifdef __STDC__
	238	SCM
	239	scm_sys_isatty_p (SCM port)
	240	#else
	241	SCM
	242	scm_sys_isatty_p (port)
	243	SCM port;
	244	#endif
	245	{
	246	int rv;
	247	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_isatty);
	248	rv = fileno ((FILE *)SCM_STREAM (port));
	249	if (rv == -1)
02b754d3 GH	250	SCM_SYSERROR (s_sys_isatty);
	251	rv = isatty (rv);
	252	return rv ? SCM_BOOL_T : SCM_BOOL_F;
0f2d19dd JB	253	}
	254
	255
	256
02b754d3	257	SCM_PROC (s_sys_fdopen, "fdopen", 2, 0, 0, scm_sys_fdopen);
0f2d19dd JB	258	#ifdef __STDC__
	259	SCM
	260	scm_sys_fdopen (SCM fdes, SCM modes)
	261	#else
	262	SCM
	263	scm_sys_fdopen (fdes, modes)
	264	SCM fdes;
	265	SCM modes;
	266	#endif
	267	{
	268	FILE *f;
	269	SCM port;
8b13c6b3	270	struct scm_port_table * pt;
0f2d19dd JB	271
	272	SCM_ASSERT (SCM_INUMP (fdes), fdes, SCM_ARG1, s_sys_fdopen);
	273	SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_fdopen);
8b13c6b3	274	SCM_NEWCELL (port);
0f2d19dd JB	275	SCM_DEFER_INTS;
	276	f = fdopen (SCM_INUM (fdes), SCM_CHARS (modes));
	277	if (f == NULL)
02b754d3	278	SCM_SYSERROR (s_sys_fdopen);
8b13c6b3 GH	279	pt = scm_add_to_port_table (port);
	280	SCM_SETPTAB_ENTRY (port, pt);
	281	if (SCM_BUF0 & (SCM_CAR (port) = scm_tc16_fport
	282	\| scm_mode_bits (SCM_CHARS (modes))))
	283	scm_setbuf0 (port);
	284	SCM_SETSTREAM (port, (SCM)f);
0f2d19dd JB	285	SCM_ALLOW_INTS;
	286	return port;
	287	}
	288
	289
	290
	291	/* Move a port's underlying file descriptor to a given value.
8b13c6b3 GH	292	* Returns #f if fdes is already the given value.
8b13c6b3 GH	293	* #t if fdes moved.
0f2d19dd JB	294	* MOVE->FDES is implemented in Scheme and calls this primitive.
0f2d19dd JB	295	*/
02b754d3	296	SCM_PROC (s_sys_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0, scm_sys_primitive_move_to_fdes);
0f2d19dd JB	297	#ifdef __STDC__
	298	SCM
	299	scm_sys_primitive_move_to_fdes (SCM port, SCM fd)
	300	#else
	301	SCM
	302	scm_sys_primitive_move_to_fdes (port, fd)
	303	SCM port;
	304	SCM fd;
	305	#endif
	306	{
	307	FILE *stream;
	308	int old_fd;
	309	int new_fd;
	310	int rv;
	311
	312	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_primitive_move_to_fdes);
	313	SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG2, s_sys_primitive_move_to_fdes);
	314	SCM_DEFER_INTS;
	315	stream = (FILE *)SCM_STREAM (port);
	316	old_fd = fileno (stream);
	317	new_fd = SCM_INUM (fd);
	318	if (old_fd == new_fd)
	319	{
	320	SCM_ALLOW_INTS;
8b13c6b3	321	return SCM_BOOL_F;
0f2d19dd JB	322	}
	323	scm_evict_ports (new_fd);
	324	rv = dup2 (old_fd, new_fd);
	325	if (rv == -1)
02b754d3	326	SCM_SYSERROR (s_sys_primitive_move_to_fdes);
0f2d19dd JB	327	scm_setfileno (stream, new_fd);
	328	SCM_SYSCALL (close (old_fd));
	329	SCM_ALLOW_INTS;
8b13c6b3	330	return SCM_BOOL_T;
0f2d19dd JB	331	}
0f2d19dd JB	332
0f2d19dd JB	333	#ifdef __STDC__
	334	void
	335	scm_setfileno (FILE *fs, int fd)
	336	#else
	337	void
	338	scm_setfileno (fs, fd)
	339	FILE *fs;
	340	int fd;
	341	#endif
	342	{
	343	#ifdef SET_FILE_FD_FIELD
	344	SET_FILE_FD_FIELD(fs, fd);
	345	#else
	346	Configure could not guess the name of the correct field in a FILE *.
	347
	348	This function needs to be ported to your system.
	349
	350	SET_FILE_FD_FIELD should change the descriptor refered to by a stdio
	351	stream, and nothing else.
	352
	353	The way to port this file is to add cases to configure.in. Search
	354	that file for "SET_FILE_FD_FIELD" and follow the examples there.
	355	#endif
	356	}
	357
	358	/* Move ports with the specified file descriptor to new descriptors,
	359	* reseting the revealed count to 0.
	360	* Should be called with SCM_DEFER_INTS active.
	361	*/
	362	#ifdef __STDC__
	363	void
	364	scm_evict_ports (int fd)
	365	#else
	366	void
	367	scm_evict_ports (fd)
	368	int fd;
	369	#endif
	370	{
	371	int i;
	372
	373	for (i = 0; i < scm_port_table_size; i++)
	374	{
	375	if (SCM_FPORTP (scm_port_table[i]->port)
	376	&& fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == fd)
	377	{
	378	scm_setfileno ((FILE *)SCM_STREAM (scm_port_table[i]->port), dup (fd));
	379	scm_set_port_revealed_x (scm_port_table[i]->port, SCM_MAKINUM (0));
	380	}
	381	}
	382	}
	383
	384	/* Return a list of ports using a given file descriptor. */
	385	SCM_PROC(s_fdes_to_ports, "fdes->ports", 1, 0, 0, scm_fdes_to_ports);
	386	#ifdef __STDC__
	387	SCM
	388	scm_fdes_to_ports (SCM fd)
	389	#else
	390	SCM
	391	scm_fdes_to_ports (fd)
	392	SCM fd;
	393	#endif
	394	{
	395	SCM result = SCM_EOL;
	396	int int_fd;
397	int i;
398
399	SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG1, s_fdes_to_ports);
400	int_fd = SCM_INUM (fd);
401
402	SCM_DEFER_INTS;
403	for (i = 0; i < scm_port_table_size; i++)
404	{
405	if (SCM_FPORTP (scm_port_table[i]->port)
406	&& fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == int_fd)
407	result = scm_cons (scm_port_table[i]->port, result);
408	}
409	SCM_ALLOW_INTS;
410	return result;
411	}
412
413	#ifdef __STDC__
414	void
415	scm_init_ioext (void)
416	#else
417	void
418	scm_init_ioext ()
419	#endif
420	{
421	/* fseek() symbols. */
422	scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET));
423	scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR));
424	scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END));
425
426	/* access() symbols. */
427	scm_sysintern ("R_OK", SCM_MAKINUM (R_OK));
428	scm_sysintern ("W_OK", SCM_MAKINUM (W_OK));
429	scm_sysintern ("X_OK", SCM_MAKINUM (X_OK));
430	scm_sysintern ("F_OK", SCM_MAKINUM (F_OK));
431
432	/* File type/permission bits. */
433	#ifdef S_IRUSR
434	scm_sysintern ("S_IRUSR", SCM_MAKINUM (S_IRUSR));
435	#endif
436	#ifdef S_IWUSR
437	scm_sysintern ("S_IWUSR", SCM_MAKINUM (S_IWUSR));
438	#endif
439	#ifdef S_IXUSR
440	scm_sysintern ("S_IXUSR", SCM_MAKINUM (S_IXUSR));
441	#endif
442	#ifdef S_IRWXU
443	scm_sysintern ("S_IRWXU", SCM_MAKINUM (S_IRWXU));
444	#endif
445
446	#ifdef S_IRGRP
447	scm_sysintern ("S_IRGRP", SCM_MAKINUM (S_IRGRP));
448	#endif
449	#ifdef S_IWGRP
450	scm_sysintern ("S_IWGRP", SCM_MAKINUM (S_IWGRP));
451	#endif
452	#ifdef S_IXGRP
453	scm_sysintern ("S_IXGRP", SCM_MAKINUM (S_IXGRP));
454	#endif
455	#ifdef S_IRWXG
456	scm_sysintern ("S_IRWXG", SCM_MAKINUM (S_IRWXG));
457	#endif
458
459	#ifdef S_IROTH
460	scm_sysintern ("S_IROTH", SCM_MAKINUM (S_IROTH));
461	#endif
462	#ifdef S_IWOTH
463	scm_sysintern ("S_IWOTH", SCM_MAKINUM (S_IWOTH));
464	#endif
465	#ifdef S_IXOTH
466	scm_sysintern ("S_IXOTH", SCM_MAKINUM (S_IXOTH));
467	#endif
468	#ifdef S_IRWXO
469	scm_sysintern ("S_IRWXO", SCM_MAKINUM (S_IRWXO));
470	#endif
471
472	#ifdef S_ISUID
473	scm_sysintern ("S_ISUID", SCM_MAKINUM (S_ISUID));
474	#endif
475	#ifdef S_ISGID
476	scm_sysintern ("S_ISGID", SCM_MAKINUM (S_ISGID));
477	#endif
478	#ifdef S_ISVTX
479	scm_sysintern ("S_ISVTX", SCM_MAKINUM (S_ISVTX));
480	#endif
481
482	#ifdef S_IFMT
483	scm_sysintern ("S_IFMT", SCM_MAKINUM (S_IFMT));
484	#endif
485	#ifdef S_IFDIR
486	scm_sysintern ("S_IFDIR", SCM_MAKINUM (S_IFDIR));
487	#endif
488	#ifdef S_IFCHR
489	scm_sysintern ("S_IFCHR", SCM_MAKINUM (S_IFCHR));
490	#endif
491	#ifdef S_IFBLK
492	scm_sysintern ("S_IFBLK", SCM_MAKINUM (S_IFBLK));
493	#endif
494	#ifdef S_IFREG
495	scm_sysintern ("S_IFREG", SCM_MAKINUM (S_IFREG));
496	#endif
497	#ifdef S_IFLNK
498	scm_sysintern ("S_IFLNK", SCM_MAKINUM (S_IFLNK));
499	#endif
500	#ifdef S_IFSOCK
501	scm_sysintern ("S_IFSOCK", SCM_MAKINUM (S_IFSOCK));
502	#endif
503	#ifdef S_IFIFO
504	scm_sysintern ("S_IFIFO", SCM_MAKINUM (S_IFIFO));
505	#endif
506	#include "ioext.x"
507	}
508