[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"
#include "fports.h"

#include "ioext.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));

  /* 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"
0f2d19dd JB	46	#include "_scm.h"
20e6290e JB	47	#include "fports.h"
	48
	49	#include "ioext.h"
0f2d19dd	50
95b88819 GH	51	#ifdef HAVE_STRING_H
	52	#include <string.h>
	53	#endif
	54	#ifdef HAVE_UNISTD_H
	55	#include <unistd.h>
	56	#endif
0f2d19dd JB	57	\f
0f2d19dd JB	58
02b754d3	59	SCM_PROC (s_sys_ftell, "ftell", 1, 0, 0, scm_sys_ftell);
0f2d19dd JB	60	#ifdef __STDC__
	61	SCM
	62	scm_sys_ftell (SCM port)
	63	#else
	64	SCM
	65	scm_sys_ftell (port)
	66	SCM port;
	67	#endif
	68	{
	69	long pos;
	70	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_ftell);
	71	SCM_SYSCALL (pos = ftell ((FILE *)SCM_STREAM (port)));
	72	if (pos < 0)
52859adf	73	scm_syserror (s_sys_ftell);
0f2d19dd JB	74	if (pos > 0 && SCM_CRDYP (port))
	75	pos--;
	76	return SCM_MAKINUM (pos);
	77	}
	78
	79
	80
02b754d3	81	SCM_PROC (s_sys_fseek, "fseek", 3, 0, 0, scm_sys_fseek);
0f2d19dd JB	82	#ifdef __STDC__
	83	SCM
	84	scm_sys_fseek (SCM port, SCM offset, SCM whence)
	85	#else
	86	SCM
	87	scm_sys_fseek (port, offset, whence)
	88	SCM port;
	89	SCM offset;
	90	SCM whence;
	91	#endif
	92	{
	93	int rv;
	94	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_fseek);
	95	SCM_ASSERT (SCM_INUMP (offset), offset, SCM_ARG2, s_sys_fseek);
	96	SCM_ASSERT (SCM_INUMP (whence) && (SCM_INUM (whence) < 3) && (SCM_INUM (whence) >= 0),
	97	whence, SCM_ARG3, s_sys_fseek);
	98	SCM_CLRDY (port); /* Clear ungetted char */
	99	/* Values of whence are interned in scm_init_ioext. */
	100	rv = fseek ((FILE *)SCM_STREAM (port), SCM_INUM (offset), SCM_INUM (whence));
02b754d3	101	if (rv != 0)
52859adf	102	scm_syserror (s_sys_fseek);
02b754d3	103	return SCM_UNSPECIFIED;
0f2d19dd JB	104	}
	105
	106
	107
02b754d3	108	SCM_PROC (s_sys_freopen, "freopen", 3, 0, 0, scm_sys_freopen);
0f2d19dd JB	109	#ifdef __STDC__
	110	SCM
	111	scm_sys_freopen (SCM filename, SCM modes, SCM port)
	112	#else
	113	SCM
	114	scm_sys_freopen (filename, modes, port)
	115	SCM filename;
	116	SCM modes;
	117	SCM port;
	118	#endif
	119	{
	120	FILE *f;
	121	SCM_ASSERT (SCM_NIMP (filename) && SCM_STRINGP (filename), filename, SCM_ARG1, s_sys_freopen);
	122	SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_freopen);
	123	SCM_DEFER_INTS;
	124	SCM_ASSERT (SCM_NIMP (port) && SCM_FPORTP (port), port, SCM_ARG3, s_sys_freopen);
	125	SCM_SYSCALL (f = freopen (SCM_CHARS (filename), SCM_CHARS (modes), (FILE *)SCM_STREAM (port)));
	126	if (!f)
	127	{
	128	SCM p;
	129	p = port;
	130	port = SCM_MAKINUM (errno);
	131	SCM_CAR (p) &= ~SCM_OPN;
	132	scm_remove_from_port_table (p);
	133	}
	134	else
	135	{
	136	SCM_CAR (port) = scm_tc16_fport \| scm_mode_bits (SCM_CHARS (modes));
	137	SCM_SETSTREAM (port, (SCM)f);
	138	if (SCM_BUF0 & (SCM_CAR (port) = scm_tc16_fport \| scm_mode_bits (SCM_CHARS (modes))))
	139	scm_setbuf0 (port);
	140	}
	141	SCM_ALLOW_INTS;
	142	return port;
	143	}
	144
	145
	146
02b754d3	147	SCM_PROC (s_sys_duplicate_port, "duplicate-port", 2, 0, 0, scm_sys_duplicate_port);
0f2d19dd JB	148	#ifdef __STDC__
	149	SCM
	150	scm_sys_duplicate_port (SCM oldpt, SCM modes)
	151	#else
	152	SCM
	153	scm_sys_duplicate_port (oldpt, modes)
	154	SCM oldpt;
	155	SCM modes;
	156	#endif
	157	{
	158	int oldfd;
	159	int newfd;
	160	FILE *f;
	161	SCM newpt;
	162	SCM_ASSERT (SCM_NIMP (oldpt) && SCM_OPPORTP (oldpt), oldpt, SCM_ARG1, s_sys_duplicate_port);
	163	SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_duplicate_port);
	164	SCM_NEWCELL (newpt);
	165	SCM_DEFER_INTS;
	166	oldfd = fileno ((FILE *)SCM_STREAM (oldpt));
	167	if (oldfd == -1)
52859adf	168	scm_syserror (s_sys_duplicate_port);
0f2d19dd JB	169	SCM_SYSCALL (newfd = dup (oldfd));
0f2d19dd JB	170	if (newfd == -1)
52859adf	171	scm_syserror (s_sys_duplicate_port);
0f2d19dd JB	172	f = fdopen (newfd, SCM_CHARS (modes));
	173	if (!f)
	174	{
	175	SCM_SYSCALL (close (newfd));
52859adf	176	scm_syserror (s_sys_duplicate_port);
0f2d19dd JB	177	}
	178	{
	179	struct scm_port_table * pt;
	180	pt = scm_add_to_port_table (newpt);
	181	SCM_SETPTAB_ENTRY (newpt, pt);
	182	if (SCM_BUF0 & (SCM_CAR (newpt) = scm_tc16_fport \| scm_mode_bits (SCM_CHARS (modes))))
	183	scm_setbuf0 (newpt);
	184	SCM_SETSTREAM (newpt, (SCM)f);
ebf7394e	185	SCM_PTAB_ENTRY (newpt)->file_name = SCM_PTAB_ENTRY (oldpt)->file_name;
0f2d19dd JB	186	}
	187	SCM_ALLOW_INTS;
	188	return newpt;
	189	}
	190
	191
	192
02b754d3	193	SCM_PROC (s_sys_redirect_port, "redirect-port", 2, 0, 0, scm_sys_redirect_port);
0f2d19dd JB	194	#ifdef __STDC__
	195	SCM
	196	scm_sys_redirect_port (SCM into_pt, SCM from_pt)
	197	#else
	198	SCM
	199	scm_sys_redirect_port (into_pt, from_pt)
	200	SCM into_pt;
	201	SCM from_pt;
	202	#endif
	203	{
	204	int ans, oldfd, newfd;
	205	SCM_DEFER_INTS;
	206	SCM_ASSERT (SCM_NIMP (into_pt) && SCM_OPPORTP (into_pt), into_pt, SCM_ARG1, s_sys_redirect_port);
	207	SCM_ASSERT (SCM_NIMP (from_pt) && SCM_OPPORTP (from_pt), from_pt, SCM_ARG2, s_sys_redirect_port);
	208	oldfd = fileno ((FILE *)SCM_STREAM (into_pt));
02b754d3	209	if (oldfd == -1)
52859adf	210	scm_syserror (s_sys_redirect_port);
0f2d19dd	211	newfd = fileno ((FILE *)SCM_STREAM (from_pt));
02b754d3	212	if (newfd == -1)
52859adf	213	scm_syserror (s_sys_redirect_port);
02b754d3 GH	214	SCM_SYSCALL (ans = dup2 (oldfd, newfd));
02b754d3 GH	215	if (ans == -1)
52859adf	216	scm_syserror (s_sys_redirect_port);
0f2d19dd	217	SCM_ALLOW_INTS;
02b754d3	218	return SCM_UNSPECIFIED;
0f2d19dd JB	219	}
0f2d19dd JB	220
8b13c6b3	221	SCM_PROC (s_sys_fileno, "fileno", 1, 0, 0, scm_sys_fileno);
0f2d19dd JB	222	#ifdef __STDC__
	223	SCM
	224	scm_sys_fileno (SCM port)
	225	#else
	226	SCM
	227	scm_sys_fileno (port)
	228	SCM port;
	229	#endif
	230	{
	231	int fd;
	232	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_fileno);
	233	fd = fileno ((FILE *)SCM_STREAM (port));
02b754d3	234	if (fd == -1)
52859adf	235	scm_syserror (s_sys_fileno);
02b754d3	236	return SCM_MAKINUM (fd);
0f2d19dd JB	237	}
0f2d19dd JB	238
02b754d3	239	SCM_PROC (s_sys_isatty, "isatty?", 1, 0, 0, scm_sys_isatty_p);
0f2d19dd JB	240	#ifdef __STDC__
	241	SCM
	242	scm_sys_isatty_p (SCM port)
	243	#else
	244	SCM
	245	scm_sys_isatty_p (port)
	246	SCM port;
	247	#endif
	248	{
	249	int rv;
	250	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_isatty);
	251	rv = fileno ((FILE *)SCM_STREAM (port));
	252	if (rv == -1)
52859adf	253	scm_syserror (s_sys_isatty);
02b754d3 GH	254	rv = isatty (rv);
02b754d3 GH	255	return rv ? SCM_BOOL_T : SCM_BOOL_F;
0f2d19dd JB	256	}
	257
	258
	259
02b754d3	260	SCM_PROC (s_sys_fdopen, "fdopen", 2, 0, 0, scm_sys_fdopen);
0f2d19dd JB	261	#ifdef __STDC__
	262	SCM
	263	scm_sys_fdopen (SCM fdes, SCM modes)
	264	#else
	265	SCM
	266	scm_sys_fdopen (fdes, modes)
	267	SCM fdes;
	268	SCM modes;
	269	#endif
	270	{
	271	FILE *f;
	272	SCM port;
8b13c6b3	273	struct scm_port_table * pt;
0f2d19dd JB	274
	275	SCM_ASSERT (SCM_INUMP (fdes), fdes, SCM_ARG1, s_sys_fdopen);
	276	SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_fdopen);
8b13c6b3	277	SCM_NEWCELL (port);
0f2d19dd JB	278	SCM_DEFER_INTS;
	279	f = fdopen (SCM_INUM (fdes), SCM_CHARS (modes));
	280	if (f == NULL)
52859adf	281	scm_syserror (s_sys_fdopen);
8b13c6b3 GH	282	pt = scm_add_to_port_table (port);
	283	SCM_SETPTAB_ENTRY (port, pt);
	284	if (SCM_BUF0 & (SCM_CAR (port) = scm_tc16_fport
	285	\| scm_mode_bits (SCM_CHARS (modes))))
	286	scm_setbuf0 (port);
	287	SCM_SETSTREAM (port, (SCM)f);
0f2d19dd JB	288	SCM_ALLOW_INTS;
	289	return port;
	290	}
	291
	292
	293
	294	/* Move a port's underlying file descriptor to a given value.
8b13c6b3 GH	295	* Returns #f if fdes is already the given value.
8b13c6b3 GH	296	* #t if fdes moved.
0f2d19dd JB	297	* MOVE->FDES is implemented in Scheme and calls this primitive.
0f2d19dd JB	298	*/
02b754d3	299	SCM_PROC (s_sys_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0, scm_sys_primitive_move_to_fdes);
0f2d19dd JB	300	#ifdef __STDC__
	301	SCM
	302	scm_sys_primitive_move_to_fdes (SCM port, SCM fd)
	303	#else
	304	SCM
	305	scm_sys_primitive_move_to_fdes (port, fd)
	306	SCM port;
	307	SCM fd;
	308	#endif
	309	{
	310	FILE *stream;
	311	int old_fd;
	312	int new_fd;
	313	int rv;
	314
	315	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_primitive_move_to_fdes);
	316	SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG2, s_sys_primitive_move_to_fdes);
	317	SCM_DEFER_INTS;
	318	stream = (FILE *)SCM_STREAM (port);
	319	old_fd = fileno (stream);
	320	new_fd = SCM_INUM (fd);
	321	if (old_fd == new_fd)
	322	{
	323	SCM_ALLOW_INTS;
8b13c6b3	324	return SCM_BOOL_F;
0f2d19dd JB	325	}
	326	scm_evict_ports (new_fd);
	327	rv = dup2 (old_fd, new_fd);
	328	if (rv == -1)
52859adf	329	scm_syserror (s_sys_primitive_move_to_fdes);
0f2d19dd JB	330	scm_setfileno (stream, new_fd);
	331	SCM_SYSCALL (close (old_fd));
	332	SCM_ALLOW_INTS;
8b13c6b3	333	return SCM_BOOL_T;
0f2d19dd JB	334	}
0f2d19dd JB	335
0f2d19dd JB	336	#ifdef __STDC__
	337	void
	338	scm_setfileno (FILE *fs, int fd)
	339	#else
	340	void
	341	scm_setfileno (fs, fd)
	342	FILE *fs;
	343	int fd;
	344	#endif
	345	{
	346	#ifdef SET_FILE_FD_FIELD
	347	SET_FILE_FD_FIELD(fs, fd);
	348	#else
	349	Configure could not guess the name of the correct field in a FILE *.
	350
	351	This function needs to be ported to your system.
	352
	353	SET_FILE_FD_FIELD should change the descriptor refered to by a stdio
	354	stream, and nothing else.
	355
	356	The way to port this file is to add cases to configure.in. Search
	357	that file for "SET_FILE_FD_FIELD" and follow the examples there.
	358	#endif
	359	}
	360
	361	/* Move ports with the specified file descriptor to new descriptors,
	362	* reseting the revealed count to 0.
	363	* Should be called with SCM_DEFER_INTS active.
	364	*/
	365	#ifdef __STDC__
	366	void
	367	scm_evict_ports (int fd)
	368	#else
	369	void
	370	scm_evict_ports (fd)
	371	int fd;
	372	#endif
	373	{
	374	int i;
	375
	376	for (i = 0; i < scm_port_table_size; i++)
	377	{
	378	if (SCM_FPORTP (scm_port_table[i]->port)
	379	&& fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == fd)
	380	{
	381	scm_setfileno ((FILE *)SCM_STREAM (scm_port_table[i]->port), dup (fd));
	382	scm_set_port_revealed_x (scm_port_table[i]->port, SCM_MAKINUM (0));
	383	}
	384	}
	385	}
	386
	387	/* Return a list of ports using a given file descriptor. */
	388	SCM_PROC(s_fdes_to_ports, "fdes->ports", 1, 0, 0, scm_fdes_to_ports);
	389	#ifdef __STDC__
	390	SCM
	391	scm_fdes_to_ports (SCM fd)
	392	#else
	393	SCM
	394	scm_fdes_to_ports (fd)
	395	SCM fd;
	396	#endif
	397	{
	398	SCM result = SCM_EOL;
	399	int int_fd;
400	int i;
401
402	SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG1, s_fdes_to_ports);
403	int_fd = SCM_INUM (fd);
404
405	SCM_DEFER_INTS;
406	for (i = 0; i < scm_port_table_size; i++)
407	{
408	if (SCM_FPORTP (scm_port_table[i]->port)
409	&& fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == int_fd)
410	result = scm_cons (scm_port_table[i]->port, result);
411	}
412	SCM_ALLOW_INTS;
413	return result;
414	}
415
416	#ifdef __STDC__
417	void
418	scm_init_ioext (void)
419	#else
420	void
421	scm_init_ioext ()
422	#endif
423	{
424	/* fseek() symbols. */
425	scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET));
426	scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR));
427	scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END));
428
0f2d19dd JB	429	/* File type/permission bits. */
	430	#ifdef S_IRUSR
	431	scm_sysintern ("S_IRUSR", SCM_MAKINUM (S_IRUSR));
	432	#endif
	433	#ifdef S_IWUSR
	434	scm_sysintern ("S_IWUSR", SCM_MAKINUM (S_IWUSR));
	435	#endif
	436	#ifdef S_IXUSR
	437	scm_sysintern ("S_IXUSR", SCM_MAKINUM (S_IXUSR));
	438	#endif
	439	#ifdef S_IRWXU
	440	scm_sysintern ("S_IRWXU", SCM_MAKINUM (S_IRWXU));
	441	#endif
	442
	443	#ifdef S_IRGRP
	444	scm_sysintern ("S_IRGRP", SCM_MAKINUM (S_IRGRP));
	445	#endif
	446	#ifdef S_IWGRP
	447	scm_sysintern ("S_IWGRP", SCM_MAKINUM (S_IWGRP));
	448	#endif
	449	#ifdef S_IXGRP
	450	scm_sysintern ("S_IXGRP", SCM_MAKINUM (S_IXGRP));
	451	#endif
	452	#ifdef S_IRWXG
	453	scm_sysintern ("S_IRWXG", SCM_MAKINUM (S_IRWXG));
	454	#endif
	455
	456	#ifdef S_IROTH
	457	scm_sysintern ("S_IROTH", SCM_MAKINUM (S_IROTH));
	458	#endif
	459	#ifdef S_IWOTH
	460	scm_sysintern ("S_IWOTH", SCM_MAKINUM (S_IWOTH));
	461	#endif
	462	#ifdef S_IXOTH
	463	scm_sysintern ("S_IXOTH", SCM_MAKINUM (S_IXOTH));
	464	#endif
	465	#ifdef S_IRWXO
	466	scm_sysintern ("S_IRWXO", SCM_MAKINUM (S_IRWXO));
	467	#endif
	468
	469	#ifdef S_ISUID
	470	scm_sysintern ("S_ISUID", SCM_MAKINUM (S_ISUID));
	471	#endif
	472	#ifdef S_ISGID
	473	scm_sysintern ("S_ISGID", SCM_MAKINUM (S_ISGID));
	474	#endif
	475	#ifdef S_ISVTX
	476	scm_sysintern ("S_ISVTX", SCM_MAKINUM (S_ISVTX));
	477	#endif
	478
	479	#ifdef S_IFMT
	480	scm_sysintern ("S_IFMT", SCM_MAKINUM (S_IFMT));
	481	#endif
	482	#ifdef S_IFDIR
	483	scm_sysintern ("S_IFDIR", SCM_MAKINUM (S_IFDIR));
	484	#endif
	485	#ifdef S_IFCHR
	486	scm_sysintern ("S_IFCHR", SCM_MAKINUM (S_IFCHR));
	487	#endif
	488	#ifdef S_IFBLK
	489	scm_sysintern ("S_IFBLK", SCM_MAKINUM (S_IFBLK));
	490	#endif
	491	#ifdef S_IFREG
	492	scm_sysintern ("S_IFREG", SCM_MAKINUM (S_IFREG));
493	#endif
494	#ifdef S_IFLNK
495	scm_sysintern ("S_IFLNK", SCM_MAKINUM (S_IFLNK));
496	#endif
497	#ifdef S_IFSOCK
498	scm_sysintern ("S_IFSOCK", SCM_MAKINUM (S_IFSOCK));
499	#endif
500	#ifdef S_IFIFO
501	scm_sysintern ("S_IFIFO", SCM_MAKINUM (S_IFIFO));
502	#endif
503	#include "ioext.x"
504	}
505