[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);

SCM 
scm_sys_ftell (port)
     SCM port;
{
  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);

SCM 
scm_sys_fseek (port, offset, whence)
     SCM port;
     SCM offset;
     SCM whence;
{
  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);

SCM 
scm_sys_freopen (filename, modes, port)
     SCM filename;
     SCM modes;
     SCM port;
{
  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);

SCM 
scm_sys_duplicate_port (oldpt, modes)
     SCM oldpt;
     SCM modes;
{
  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);

SCM 
scm_sys_redirect_port (into_pt, from_pt)
     SCM into_pt;
     SCM from_pt;
{
  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);

SCM 
scm_sys_fileno (port)
     SCM port;
{
  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);

SCM 
scm_sys_isatty_p (port)
     SCM port;
{
  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);

SCM
scm_sys_fdopen (fdes, modes)
     SCM fdes;
     SCM modes;
{
  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);

SCM
scm_sys_primitive_move_to_fdes (port, fd)
     SCM port;
     SCM fd;
{
  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;
}


void
scm_setfileno (fs, fd)
     FILE *fs;
     int fd;
{
#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.
 */

void
scm_evict_ports (fd)
     int fd;
{
  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);

SCM
scm_fdes_to_ports (fd)
     SCM fd;
{
  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;
}    


void 
scm_init_ioext ()
{
  /* 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);
1cc91f1b	60
0f2d19dd JB	61	SCM
	62	scm_sys_ftell (port)
	63	SCM port;
0f2d19dd JB	64	{
	65	long pos;
	66	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_ftell);
	67	SCM_SYSCALL (pos = ftell ((FILE *)SCM_STREAM (port)));
	68	if (pos < 0)
52859adf	69	scm_syserror (s_sys_ftell);
0f2d19dd JB	70	if (pos > 0 && SCM_CRDYP (port))
	71	pos--;
	72	return SCM_MAKINUM (pos);
	73	}
	74
	75
	76
02b754d3	77	SCM_PROC (s_sys_fseek, "fseek", 3, 0, 0, scm_sys_fseek);
1cc91f1b	78
0f2d19dd JB	79	SCM
	80	scm_sys_fseek (port, offset, whence)
	81	SCM port;
	82	SCM offset;
	83	SCM whence;
0f2d19dd JB	84	{
	85	int rv;
	86	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_fseek);
	87	SCM_ASSERT (SCM_INUMP (offset), offset, SCM_ARG2, s_sys_fseek);
	88	SCM_ASSERT (SCM_INUMP (whence) && (SCM_INUM (whence) < 3) && (SCM_INUM (whence) >= 0),
	89	whence, SCM_ARG3, s_sys_fseek);
	90	SCM_CLRDY (port); /* Clear ungetted char */
	91	/* Values of whence are interned in scm_init_ioext. */
	92	rv = fseek ((FILE *)SCM_STREAM (port), SCM_INUM (offset), SCM_INUM (whence));
02b754d3	93	if (rv != 0)
52859adf	94	scm_syserror (s_sys_fseek);
02b754d3	95	return SCM_UNSPECIFIED;
0f2d19dd JB	96	}
	97
	98
	99
02b754d3	100	SCM_PROC (s_sys_freopen, "freopen", 3, 0, 0, scm_sys_freopen);
1cc91f1b	101
0f2d19dd JB	102	SCM
	103	scm_sys_freopen (filename, modes, port)
	104	SCM filename;
	105	SCM modes;
	106	SCM port;
0f2d19dd JB	107	{
	108	FILE *f;
	109	SCM_ASSERT (SCM_NIMP (filename) && SCM_STRINGP (filename), filename, SCM_ARG1, s_sys_freopen);
	110	SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_freopen);
	111	SCM_DEFER_INTS;
	112	SCM_ASSERT (SCM_NIMP (port) && SCM_FPORTP (port), port, SCM_ARG3, s_sys_freopen);
	113	SCM_SYSCALL (f = freopen (SCM_CHARS (filename), SCM_CHARS (modes), (FILE *)SCM_STREAM (port)));
	114	if (!f)
	115	{
	116	SCM p;
	117	p = port;
	118	port = SCM_MAKINUM (errno);
	119	SCM_CAR (p) &= ~SCM_OPN;
	120	scm_remove_from_port_table (p);
	121	}
	122	else
	123	{
	124	SCM_CAR (port) = scm_tc16_fport \| scm_mode_bits (SCM_CHARS (modes));
	125	SCM_SETSTREAM (port, (SCM)f);
	126	if (SCM_BUF0 & (SCM_CAR (port) = scm_tc16_fport \| scm_mode_bits (SCM_CHARS (modes))))
	127	scm_setbuf0 (port);
	128	}
	129	SCM_ALLOW_INTS;
	130	return port;
	131	}
	132
	133
	134
02b754d3	135	SCM_PROC (s_sys_duplicate_port, "duplicate-port", 2, 0, 0, scm_sys_duplicate_port);
1cc91f1b	136
0f2d19dd JB	137	SCM
	138	scm_sys_duplicate_port (oldpt, modes)
	139	SCM oldpt;
	140	SCM modes;
0f2d19dd JB	141	{
	142	int oldfd;
	143	int newfd;
	144	FILE *f;
	145	SCM newpt;
	146	SCM_ASSERT (SCM_NIMP (oldpt) && SCM_OPPORTP (oldpt), oldpt, SCM_ARG1, s_sys_duplicate_port);
	147	SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_duplicate_port);
	148	SCM_NEWCELL (newpt);
	149	SCM_DEFER_INTS;
	150	oldfd = fileno ((FILE *)SCM_STREAM (oldpt));
	151	if (oldfd == -1)
52859adf	152	scm_syserror (s_sys_duplicate_port);
0f2d19dd JB	153	SCM_SYSCALL (newfd = dup (oldfd));
0f2d19dd JB	154	if (newfd == -1)
52859adf	155	scm_syserror (s_sys_duplicate_port);
0f2d19dd JB	156	f = fdopen (newfd, SCM_CHARS (modes));
	157	if (!f)
	158	{
	159	SCM_SYSCALL (close (newfd));
52859adf	160	scm_syserror (s_sys_duplicate_port);
0f2d19dd JB	161	}
	162	{
	163	struct scm_port_table * pt;
	164	pt = scm_add_to_port_table (newpt);
	165	SCM_SETPTAB_ENTRY (newpt, pt);
	166	if (SCM_BUF0 & (SCM_CAR (newpt) = scm_tc16_fport \| scm_mode_bits (SCM_CHARS (modes))))
	167	scm_setbuf0 (newpt);
	168	SCM_SETSTREAM (newpt, (SCM)f);
ebf7394e	169	SCM_PTAB_ENTRY (newpt)->file_name = SCM_PTAB_ENTRY (oldpt)->file_name;
0f2d19dd JB	170	}
	171	SCM_ALLOW_INTS;
	172	return newpt;
	173	}
	174
	175
	176
02b754d3	177	SCM_PROC (s_sys_redirect_port, "redirect-port", 2, 0, 0, scm_sys_redirect_port);
1cc91f1b	178
0f2d19dd JB	179	SCM
	180	scm_sys_redirect_port (into_pt, from_pt)
	181	SCM into_pt;
	182	SCM from_pt;
0f2d19dd JB	183	{
	184	int ans, oldfd, newfd;
	185	SCM_DEFER_INTS;
	186	SCM_ASSERT (SCM_NIMP (into_pt) && SCM_OPPORTP (into_pt), into_pt, SCM_ARG1, s_sys_redirect_port);
	187	SCM_ASSERT (SCM_NIMP (from_pt) && SCM_OPPORTP (from_pt), from_pt, SCM_ARG2, s_sys_redirect_port);
	188	oldfd = fileno ((FILE *)SCM_STREAM (into_pt));
02b754d3	189	if (oldfd == -1)
52859adf	190	scm_syserror (s_sys_redirect_port);
0f2d19dd	191	newfd = fileno ((FILE *)SCM_STREAM (from_pt));
02b754d3	192	if (newfd == -1)
52859adf	193	scm_syserror (s_sys_redirect_port);
02b754d3 GH	194	SCM_SYSCALL (ans = dup2 (oldfd, newfd));
02b754d3 GH	195	if (ans == -1)
52859adf	196	scm_syserror (s_sys_redirect_port);
0f2d19dd	197	SCM_ALLOW_INTS;
02b754d3	198	return SCM_UNSPECIFIED;
0f2d19dd JB	199	}
0f2d19dd JB	200
8b13c6b3	201	SCM_PROC (s_sys_fileno, "fileno", 1, 0, 0, scm_sys_fileno);
1cc91f1b	202
0f2d19dd JB	203	SCM
	204	scm_sys_fileno (port)
	205	SCM port;
0f2d19dd JB	206	{
	207	int fd;
	208	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_fileno);
	209	fd = fileno ((FILE *)SCM_STREAM (port));
02b754d3	210	if (fd == -1)
52859adf	211	scm_syserror (s_sys_fileno);
02b754d3	212	return SCM_MAKINUM (fd);
0f2d19dd JB	213	}
0f2d19dd JB	214
02b754d3	215	SCM_PROC (s_sys_isatty, "isatty?", 1, 0, 0, scm_sys_isatty_p);
1cc91f1b	216
0f2d19dd JB	217	SCM
	218	scm_sys_isatty_p (port)
	219	SCM port;
0f2d19dd JB	220	{
	221	int rv;
	222	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_isatty);
	223	rv = fileno ((FILE *)SCM_STREAM (port));
	224	if (rv == -1)
52859adf	225	scm_syserror (s_sys_isatty);
02b754d3 GH	226	rv = isatty (rv);
02b754d3 GH	227	return rv ? SCM_BOOL_T : SCM_BOOL_F;
0f2d19dd JB	228	}
	229
	230
	231
02b754d3	232	SCM_PROC (s_sys_fdopen, "fdopen", 2, 0, 0, scm_sys_fdopen);
1cc91f1b	233
0f2d19dd JB	234	SCM
	235	scm_sys_fdopen (fdes, modes)
	236	SCM fdes;
	237	SCM modes;
0f2d19dd JB	238	{
	239	FILE *f;
	240	SCM port;
8b13c6b3	241	struct scm_port_table * pt;
0f2d19dd JB	242
	243	SCM_ASSERT (SCM_INUMP (fdes), fdes, SCM_ARG1, s_sys_fdopen);
	244	SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_fdopen);
8b13c6b3	245	SCM_NEWCELL (port);
0f2d19dd JB	246	SCM_DEFER_INTS;
	247	f = fdopen (SCM_INUM (fdes), SCM_CHARS (modes));
	248	if (f == NULL)
52859adf	249	scm_syserror (s_sys_fdopen);
8b13c6b3 GH	250	pt = scm_add_to_port_table (port);
	251	SCM_SETPTAB_ENTRY (port, pt);
	252	if (SCM_BUF0 & (SCM_CAR (port) = scm_tc16_fport
	253	\| scm_mode_bits (SCM_CHARS (modes))))
	254	scm_setbuf0 (port);
	255	SCM_SETSTREAM (port, (SCM)f);
0f2d19dd JB	256	SCM_ALLOW_INTS;
	257	return port;
	258	}
	259
	260
	261
	262	/* Move a port's underlying file descriptor to a given value.
8b13c6b3 GH	263	* Returns #f if fdes is already the given value.
8b13c6b3 GH	264	* #t if fdes moved.
0f2d19dd JB	265	* MOVE->FDES is implemented in Scheme and calls this primitive.
0f2d19dd JB	266	*/
02b754d3	267	SCM_PROC (s_sys_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0, scm_sys_primitive_move_to_fdes);
1cc91f1b	268
0f2d19dd JB	269	SCM
	270	scm_sys_primitive_move_to_fdes (port, fd)
	271	SCM port;
	272	SCM fd;
0f2d19dd JB	273	{
	274	FILE *stream;
	275	int old_fd;
	276	int new_fd;
	277	int rv;
	278
	279	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_primitive_move_to_fdes);
	280	SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG2, s_sys_primitive_move_to_fdes);
	281	SCM_DEFER_INTS;
	282	stream = (FILE *)SCM_STREAM (port);
	283	old_fd = fileno (stream);
	284	new_fd = SCM_INUM (fd);
	285	if (old_fd == new_fd)
	286	{
	287	SCM_ALLOW_INTS;
8b13c6b3	288	return SCM_BOOL_F;
0f2d19dd JB	289	}
	290	scm_evict_ports (new_fd);
	291	rv = dup2 (old_fd, new_fd);
	292	if (rv == -1)
52859adf	293	scm_syserror (s_sys_primitive_move_to_fdes);
0f2d19dd JB	294	scm_setfileno (stream, new_fd);
	295	SCM_SYSCALL (close (old_fd));
	296	SCM_ALLOW_INTS;
8b13c6b3	297	return SCM_BOOL_T;
0f2d19dd JB	298	}
0f2d19dd JB	299
1cc91f1b	300
0f2d19dd JB	301	void
	302	scm_setfileno (fs, fd)
	303	FILE *fs;
	304	int fd;
0f2d19dd JB	305	{
	306	#ifdef SET_FILE_FD_FIELD
	307	SET_FILE_FD_FIELD(fs, fd);
	308	#else
	309	Configure could not guess the name of the correct field in a FILE *.
	310
	311	This function needs to be ported to your system.
	312
	313	SET_FILE_FD_FIELD should change the descriptor refered to by a stdio
	314	stream, and nothing else.
	315
	316	The way to port this file is to add cases to configure.in. Search
	317	that file for "SET_FILE_FD_FIELD" and follow the examples there.
	318	#endif
	319	}
	320
	321	/* Move ports with the specified file descriptor to new descriptors,
	322	* reseting the revealed count to 0.
	323	* Should be called with SCM_DEFER_INTS active.
	324	*/
1cc91f1b	325
0f2d19dd JB	326	void
	327	scm_evict_ports (fd)
	328	int fd;
0f2d19dd JB	329	{
	330	int i;
	331
	332	for (i = 0; i < scm_port_table_size; i++)
	333	{
	334	if (SCM_FPORTP (scm_port_table[i]->port)
	335	&& fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == fd)
	336	{
	337	scm_setfileno ((FILE *)SCM_STREAM (scm_port_table[i]->port), dup (fd));
	338	scm_set_port_revealed_x (scm_port_table[i]->port, SCM_MAKINUM (0));
	339	}
	340	}
	341	}
	342
	343	/* Return a list of ports using a given file descriptor. */
	344	SCM_PROC(s_fdes_to_ports, "fdes->ports", 1, 0, 0, scm_fdes_to_ports);
1cc91f1b	345
0f2d19dd JB	346	SCM
	347	scm_fdes_to_ports (fd)
	348	SCM fd;
0f2d19dd JB	349	{
	350	SCM result = SCM_EOL;
	351	int int_fd;
	352	int i;
	353
	354	SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG1, s_fdes_to_ports);
	355	int_fd = SCM_INUM (fd);
	356
	357	SCM_DEFER_INTS;
	358	for (i = 0; i < scm_port_table_size; i++)
	359	{
	360	if (SCM_FPORTP (scm_port_table[i]->port)
	361	&& fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == int_fd)
	362	result = scm_cons (scm_port_table[i]->port, result);
	363	}
	364	SCM_ALLOW_INTS;
	365	return result;
	366	}
	367
1cc91f1b	368
0f2d19dd JB	369	void
0f2d19dd JB	370	scm_init_ioext ()
0f2d19dd JB	371	{
	372	/* fseek() symbols. */
	373	scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET));
	374	scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR));
	375	scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END));
	376
0f2d19dd JB	377	/* File type/permission bits. */
	378	#ifdef S_IRUSR
	379	scm_sysintern ("S_IRUSR", SCM_MAKINUM (S_IRUSR));
	380	#endif
	381	#ifdef S_IWUSR
	382	scm_sysintern ("S_IWUSR", SCM_MAKINUM (S_IWUSR));
	383	#endif
	384	#ifdef S_IXUSR
	385	scm_sysintern ("S_IXUSR", SCM_MAKINUM (S_IXUSR));
	386	#endif
	387	#ifdef S_IRWXU
	388	scm_sysintern ("S_IRWXU", SCM_MAKINUM (S_IRWXU));
	389	#endif
	390
	391	#ifdef S_IRGRP
	392	scm_sysintern ("S_IRGRP", SCM_MAKINUM (S_IRGRP));
	393	#endif
	394	#ifdef S_IWGRP
	395	scm_sysintern ("S_IWGRP", SCM_MAKINUM (S_IWGRP));
	396	#endif
	397	#ifdef S_IXGRP
	398	scm_sysintern ("S_IXGRP", SCM_MAKINUM (S_IXGRP));
	399	#endif
	400	#ifdef S_IRWXG
	401	scm_sysintern ("S_IRWXG", SCM_MAKINUM (S_IRWXG));
	402	#endif
	403
	404	#ifdef S_IROTH
	405	scm_sysintern ("S_IROTH", SCM_MAKINUM (S_IROTH));
	406	#endif
	407	#ifdef S_IWOTH
	408	scm_sysintern ("S_IWOTH", SCM_MAKINUM (S_IWOTH));
	409	#endif
	410	#ifdef S_IXOTH
	411	scm_sysintern ("S_IXOTH", SCM_MAKINUM (S_IXOTH));
	412	#endif
	413	#ifdef S_IRWXO
	414	scm_sysintern ("S_IRWXO", SCM_MAKINUM (S_IRWXO));
	415	#endif
	416
	417	#ifdef S_ISUID
	418	scm_sysintern ("S_ISUID", SCM_MAKINUM (S_ISUID));
	419	#endif
	420	#ifdef S_ISGID
	421	scm_sysintern ("S_ISGID", SCM_MAKINUM (S_ISGID));
	422	#endif
	423	#ifdef S_ISVTX
	424	scm_sysintern ("S_ISVTX", SCM_MAKINUM (S_ISVTX));
	425	#endif
	426
	427	#ifdef S_IFMT
	428	scm_sysintern ("S_IFMT", SCM_MAKINUM (S_IFMT));
	429	#endif
	430	#ifdef S_IFDIR
	431	scm_sysintern ("S_IFDIR", SCM_MAKINUM (S_IFDIR));
	432	#endif
	433	#ifdef S_IFCHR
	434	scm_sysintern ("S_IFCHR", SCM_MAKINUM (S_IFCHR));
	435	#endif
	436	#ifdef S_IFBLK
	437	scm_sysintern ("S_IFBLK", SCM_MAKINUM (S_IFBLK));
	438	#endif
	439	#ifdef S_IFREG
	440	scm_sysintern ("S_IFREG", SCM_MAKINUM (S_IFREG));
441	#endif
442	#ifdef S_IFLNK
443	scm_sysintern ("S_IFLNK", SCM_MAKINUM (S_IFLNK));
444	#endif
445	#ifdef S_IFSOCK
446	scm_sysintern ("S_IFSOCK", SCM_MAKINUM (S_IFSOCK));
447	#endif
448	#ifdef S_IFIFO
449	scm_sysintern ("S_IFIFO", SCM_MAKINUM (S_IFIFO));
450	#endif
451	#include "ioext.x"
452	}
453