[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 <unistd.h>
#include "fd.h"
#include "_scm.h"

\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_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_OPFPORTP (port), port, SCM_ARG1, s_sys_fileno);

  fd = fileno ((FILE *)SCM_STREAM (port));
  if (fd == -1)
    SCM_SYSERROR (s_sys_soft_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;

  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_SYSERROR (s_sys_fdopen);
  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  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_SYSERROR (s_sys_primitive_move_to_fdes);
  scm_setfileno (stream, new_fd);
  SCM_SYSCALL (close (old_fd));  
  SCM_ALLOW_INTS;
  return SCM_MAKINUM (1);
}

#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>
	45	#include <unistd.h>
	46	#include "fd.h"
	47	#include "_scm.h"
	48
	49	\f
	50
02b754d3	51	SCM_PROC (s_sys_ftell, "ftell", 1, 0, 0, scm_sys_ftell);
0f2d19dd JB	52	#ifdef __STDC__
	53	SCM
	54	scm_sys_ftell (SCM port)
	55	#else
	56	SCM
	57	scm_sys_ftell (port)
	58	SCM port;
	59	#endif
	60	{
	61	long pos;
	62	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_ftell);
	63	SCM_SYSCALL (pos = ftell ((FILE *)SCM_STREAM (port)));
	64	if (pos < 0)
02b754d3	65	SCM_SYSERROR (s_sys_ftell);
0f2d19dd JB	66	if (pos > 0 && SCM_CRDYP (port))
	67	pos--;
	68	return SCM_MAKINUM (pos);
	69	}
	70
	71
	72
02b754d3	73	SCM_PROC (s_sys_fseek, "fseek", 3, 0, 0, scm_sys_fseek);
0f2d19dd JB	74	#ifdef __STDC__
	75	SCM
	76	scm_sys_fseek (SCM port, SCM offset, SCM whence)
	77	#else
	78	SCM
	79	scm_sys_fseek (port, offset, whence)
	80	SCM port;
	81	SCM offset;
	82	SCM whence;
	83	#endif
	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 GH	93	if (rv != 0)
	94	SCM_SYSERROR (s_sys_fseek);
	95	return SCM_UNSPECIFIED;
0f2d19dd JB	96	}
	97
	98
	99
02b754d3	100	SCM_PROC (s_sys_freopen, "freopen", 3, 0, 0, scm_sys_freopen);
0f2d19dd JB	101	#ifdef __STDC__
	102	SCM
	103	scm_sys_freopen (SCM filename, SCM modes, SCM port)
	104	#else
	105	SCM
	106	scm_sys_freopen (filename, modes, port)
	107	SCM filename;
	108	SCM modes;
	109	SCM port;
	110	#endif
	111	{
	112	FILE *f;
	113	SCM_ASSERT (SCM_NIMP (filename) && SCM_STRINGP (filename), filename, SCM_ARG1, s_sys_freopen);
	114	SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_freopen);
	115	SCM_DEFER_INTS;
	116	SCM_ASSERT (SCM_NIMP (port) && SCM_FPORTP (port), port, SCM_ARG3, s_sys_freopen);
	117	SCM_SYSCALL (f = freopen (SCM_CHARS (filename), SCM_CHARS (modes), (FILE *)SCM_STREAM (port)));
	118	if (!f)
	119	{
	120	SCM p;
	121	p = port;
	122	port = SCM_MAKINUM (errno);
	123	SCM_CAR (p) &= ~SCM_OPN;
	124	scm_remove_from_port_table (p);
	125	}
	126	else
	127	{
	128	SCM_CAR (port) = scm_tc16_fport \| scm_mode_bits (SCM_CHARS (modes));
	129	SCM_SETSTREAM (port, (SCM)f);
	130	if (SCM_BUF0 & (SCM_CAR (port) = scm_tc16_fport \| scm_mode_bits (SCM_CHARS (modes))))
	131	scm_setbuf0 (port);
	132	}
	133	SCM_ALLOW_INTS;
	134	return port;
	135	}
	136
	137
	138
02b754d3	139	SCM_PROC (s_sys_duplicate_port, "duplicate-port", 2, 0, 0, scm_sys_duplicate_port);
0f2d19dd JB	140	#ifdef __STDC__
	141	SCM
	142	scm_sys_duplicate_port (SCM oldpt, SCM modes)
	143	#else
	144	SCM
	145	scm_sys_duplicate_port (oldpt, modes)
	146	SCM oldpt;
	147	SCM modes;
	148	#endif
	149	{
	150	int oldfd;
	151	int newfd;
	152	FILE *f;
	153	SCM newpt;
	154	SCM_ASSERT (SCM_NIMP (oldpt) && SCM_OPPORTP (oldpt), oldpt, SCM_ARG1, s_sys_duplicate_port);
	155	SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_duplicate_port);
	156	SCM_NEWCELL (newpt);
	157	SCM_DEFER_INTS;
	158	oldfd = fileno ((FILE *)SCM_STREAM (oldpt));
	159	if (oldfd == -1)
02b754d3	160	SCM_SYSERROR (s_sys_duplicate_port);
0f2d19dd JB	161	SCM_SYSCALL (newfd = dup (oldfd));
0f2d19dd JB	162	if (newfd == -1)
02b754d3	163	SCM_SYSERROR (s_sys_duplicate_port);
0f2d19dd JB	164	f = fdopen (newfd, SCM_CHARS (modes));
	165	if (!f)
	166	{
	167	SCM_SYSCALL (close (newfd));
02b754d3	168	SCM_SYSERROR (s_sys_duplicate_port);
0f2d19dd JB	169	}
	170	{
	171	struct scm_port_table * pt;
	172	pt = scm_add_to_port_table (newpt);
	173	SCM_SETPTAB_ENTRY (newpt, pt);
	174	if (SCM_BUF0 & (SCM_CAR (newpt) = scm_tc16_fport \| scm_mode_bits (SCM_CHARS (modes))))
	175	scm_setbuf0 (newpt);
	176	SCM_SETSTREAM (newpt, (SCM)f);
	177	SCM_PTAB_ENTRY (newpt)->file_name = SCM_PTAB_ENTRY (oldpt)->file_name;
	178	}
	179	SCM_ALLOW_INTS;
	180	return newpt;
	181	}
	182
	183
	184
02b754d3	185	SCM_PROC (s_sys_redirect_port, "redirect-port", 2, 0, 0, scm_sys_redirect_port);
0f2d19dd JB	186	#ifdef __STDC__
	187	SCM
	188	scm_sys_redirect_port (SCM into_pt, SCM from_pt)
	189	#else
	190	SCM
	191	scm_sys_redirect_port (into_pt, from_pt)
	192	SCM into_pt;
	193	SCM from_pt;
	194	#endif
	195	{
	196	int ans, oldfd, newfd;
	197	SCM_DEFER_INTS;
	198	SCM_ASSERT (SCM_NIMP (into_pt) && SCM_OPPORTP (into_pt), into_pt, SCM_ARG1, s_sys_redirect_port);
	199	SCM_ASSERT (SCM_NIMP (from_pt) && SCM_OPPORTP (from_pt), from_pt, SCM_ARG2, s_sys_redirect_port);
	200	oldfd = fileno ((FILE *)SCM_STREAM (into_pt));
02b754d3 GH	201	if (oldfd == -1)
02b754d3 GH	202	SCM_SYSERROR (s_sys_redirect_port);
0f2d19dd	203	newfd = fileno ((FILE *)SCM_STREAM (from_pt));
02b754d3 GH	204	if (newfd == -1)
	205	SCM_SYSERROR (s_sys_redirect_port);
	206	SCM_SYSCALL (ans = dup2 (oldfd, newfd));
	207	if (ans == -1)
	208	SCM_SYSERROR (s_sys_redirect_port);
0f2d19dd	209	SCM_ALLOW_INTS;
02b754d3	210	return SCM_UNSPECIFIED;
0f2d19dd JB	211	}
	212
	213	SCM_PROC (s_sys_fileno, "%fileno", 1, 0, 0, scm_sys_fileno);
	214	#ifdef __STDC__
	215	SCM
	216	scm_sys_fileno (SCM port)
	217	#else
	218	SCM
	219	scm_sys_fileno (port)
	220	SCM port;
	221	#endif
	222	{
	223	int fd;
	224	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_fileno);
	225	fd = fileno ((FILE *)SCM_STREAM (port));
02b754d3 GH	226	if (fd == -1)
	227	SCM_SYSERROR (s_sys_fileno);
	228	return SCM_MAKINUM (fd);
0f2d19dd JB	229	}
0f2d19dd JB	230
02b754d3	231	SCM_PROC (s_sys_soft_fileno, "soft-fileno", 1, 0, 0, scm_sys_soft_fileno);
0f2d19dd JB	232	#ifdef __STDC__
	233	SCM
	234	scm_sys_soft_fileno (SCM port)
	235	#else
	236	SCM
	237	scm_sys_soft_fileno (port)
	238	SCM port;
	239	#endif
	240	{
	241	int fd;
02b754d3	242	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_fileno);
0f2d19dd JB	243
0f2d19dd JB	244	fd = fileno ((FILE *)SCM_STREAM (port));
02b754d3 GH	245	if (fd == -1)
	246	SCM_SYSERROR (s_sys_soft_fileno);
	247	return SCM_MAKINUM (fd);
0f2d19dd JB	248	}
	249
	250
	251
02b754d3	252	SCM_PROC (s_sys_isatty, "isatty?", 1, 0, 0, scm_sys_isatty_p);
0f2d19dd JB	253	#ifdef __STDC__
	254	SCM
	255	scm_sys_isatty_p (SCM port)
	256	#else
	257	SCM
	258	scm_sys_isatty_p (port)
	259	SCM port;
	260	#endif
	261	{
	262	int rv;
	263	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_isatty);
	264	rv = fileno ((FILE *)SCM_STREAM (port));
	265	if (rv == -1)
02b754d3 GH	266	SCM_SYSERROR (s_sys_isatty);
	267	rv = isatty (rv);
	268	return rv ? SCM_BOOL_T : SCM_BOOL_F;
0f2d19dd JB	269	}
	270
	271
	272
02b754d3	273	SCM_PROC (s_sys_fdopen, "fdopen", 2, 0, 0, scm_sys_fdopen);
0f2d19dd JB	274	#ifdef __STDC__
	275	SCM
	276	scm_sys_fdopen (SCM fdes, SCM modes)
	277	#else
	278	SCM
	279	scm_sys_fdopen (fdes, modes)
	280	SCM fdes;
	281	SCM modes;
	282	#endif
	283	{
	284	FILE *f;
	285	SCM port;
	286
	287	SCM_ASSERT (SCM_INUMP (fdes), fdes, SCM_ARG1, s_sys_fdopen);
	288	SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_sys_fdopen);
	289	SCM_DEFER_INTS;
	290	f = fdopen (SCM_INUM (fdes), SCM_CHARS (modes));
	291	if (f == NULL)
02b754d3	292	SCM_SYSERROR (s_sys_fdopen);
0f2d19dd JB	293	SCM_NEWCELL (port);
	294	SCM_CAR (port) = scm_tc16_fport \| scm_mode_bits (SCM_CHARS (modes));
	295	SCM_SETSTREAM (port,(SCM)f);
	296	scm_add_to_port_table (port);
	297	SCM_ALLOW_INTS;
	298	return port;
	299	}
	300
	301
	302
	303	/* Move a port's underlying file descriptor to a given value.
02b754d3 GH	304	* Returns 0 if fdes is already the given value.
02b754d3 GH	305	* 1 if fdes moved.
0f2d19dd JB	306	* MOVE->FDES is implemented in Scheme and calls this primitive.
0f2d19dd JB	307	*/
02b754d3	308	SCM_PROC (s_sys_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0, scm_sys_primitive_move_to_fdes);
0f2d19dd JB	309	#ifdef __STDC__
	310	SCM
	311	scm_sys_primitive_move_to_fdes (SCM port, SCM fd)
	312	#else
	313	SCM
	314	scm_sys_primitive_move_to_fdes (port, fd)
	315	SCM port;
	316	SCM fd;
	317	#endif
	318	{
	319	FILE *stream;
	320	int old_fd;
	321	int new_fd;
	322	int rv;
	323
	324	SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_sys_primitive_move_to_fdes);
	325	SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG2, s_sys_primitive_move_to_fdes);
	326	SCM_DEFER_INTS;
	327	stream = (FILE *)SCM_STREAM (port);
	328	old_fd = fileno (stream);
	329	new_fd = SCM_INUM (fd);
	330	if (old_fd == new_fd)
	331	{
	332	SCM_ALLOW_INTS;
	333	return SCM_MAKINUM (0);
	334	}
	335	scm_evict_ports (new_fd);
	336	rv = dup2 (old_fd, new_fd);
	337	if (rv == -1)
02b754d3	338	SCM_SYSERROR (s_sys_primitive_move_to_fdes);
0f2d19dd JB	339	scm_setfileno (stream, new_fd);
	340	SCM_SYSCALL (close (old_fd));
	341	SCM_ALLOW_INTS;
	342	return SCM_MAKINUM (1);
	343	}
	344
0f2d19dd JB	345	#ifdef __STDC__
	346	void
	347	scm_setfileno (FILE *fs, int fd)
	348	#else
	349	void
	350	scm_setfileno (fs, fd)
	351	FILE *fs;
	352	int fd;
	353	#endif
	354	{
	355	#ifdef SET_FILE_FD_FIELD
	356	SET_FILE_FD_FIELD(fs, fd);
	357	#else
	358	Configure could not guess the name of the correct field in a FILE *.
	359
	360	This function needs to be ported to your system.
	361
	362	SET_FILE_FD_FIELD should change the descriptor refered to by a stdio
	363	stream, and nothing else.
	364
	365	The way to port this file is to add cases to configure.in. Search
	366	that file for "SET_FILE_FD_FIELD" and follow the examples there.
	367	#endif
	368	}
	369
	370	/* Move ports with the specified file descriptor to new descriptors,
	371	* reseting the revealed count to 0.
	372	* Should be called with SCM_DEFER_INTS active.
	373	*/
	374	#ifdef __STDC__
	375	void
	376	scm_evict_ports (int fd)
	377	#else
	378	void
	379	scm_evict_ports (fd)
	380	int fd;
	381	#endif
	382	{
	383	int i;
	384
	385	for (i = 0; i < scm_port_table_size; i++)
	386	{
	387	if (SCM_FPORTP (scm_port_table[i]->port)
	388	&& fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == fd)
	389	{
	390	scm_setfileno ((FILE *)SCM_STREAM (scm_port_table[i]->port), dup (fd));
	391	scm_set_port_revealed_x (scm_port_table[i]->port, SCM_MAKINUM (0));
	392	}
	393	}
	394	}
	395
	396	/* Return a list of ports using a given file descriptor. */
	397	SCM_PROC(s_fdes_to_ports, "fdes->ports", 1, 0, 0, scm_fdes_to_ports);
	398	#ifdef __STDC__
	399	SCM
	400	scm_fdes_to_ports (SCM fd)
	401	#else
	402	SCM
	403	scm_fdes_to_ports (fd)
	404	SCM fd;
	405	#endif
	406	{
	407	SCM result = SCM_EOL;
	408	int int_fd;
409	int i;
410
411	SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG1, s_fdes_to_ports);
412	int_fd = SCM_INUM (fd);
413
414	SCM_DEFER_INTS;
415	for (i = 0; i < scm_port_table_size; i++)
416	{
417	if (SCM_FPORTP (scm_port_table[i]->port)
418	&& fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == int_fd)
419	result = scm_cons (scm_port_table[i]->port, result);
420	}
421	SCM_ALLOW_INTS;
422	return result;
423	}
424
425	#ifdef __STDC__
426	void
427	scm_init_ioext (void)
428	#else
429	void
430	scm_init_ioext ()
431	#endif
432	{
433	/* fseek() symbols. */
434	scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET));
435	scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR));
436	scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END));
437
438	/* access() symbols. */
439	scm_sysintern ("R_OK", SCM_MAKINUM (R_OK));
440	scm_sysintern ("W_OK", SCM_MAKINUM (W_OK));
441	scm_sysintern ("X_OK", SCM_MAKINUM (X_OK));
442	scm_sysintern ("F_OK", SCM_MAKINUM (F_OK));
443
444	/* File type/permission bits. */
445	#ifdef S_IRUSR
446	scm_sysintern ("S_IRUSR", SCM_MAKINUM (S_IRUSR));
447	#endif
448	#ifdef S_IWUSR
449	scm_sysintern ("S_IWUSR", SCM_MAKINUM (S_IWUSR));
450	#endif
451	#ifdef S_IXUSR
452	scm_sysintern ("S_IXUSR", SCM_MAKINUM (S_IXUSR));
453	#endif
454	#ifdef S_IRWXU
455	scm_sysintern ("S_IRWXU", SCM_MAKINUM (S_IRWXU));
456	#endif
457
458	#ifdef S_IRGRP
459	scm_sysintern ("S_IRGRP", SCM_MAKINUM (S_IRGRP));
460	#endif
461	#ifdef S_IWGRP
462	scm_sysintern ("S_IWGRP", SCM_MAKINUM (S_IWGRP));
463	#endif
464	#ifdef S_IXGRP
465	scm_sysintern ("S_IXGRP", SCM_MAKINUM (S_IXGRP));
466	#endif
467	#ifdef S_IRWXG
468	scm_sysintern ("S_IRWXG", SCM_MAKINUM (S_IRWXG));
469	#endif
470
471	#ifdef S_IROTH
472	scm_sysintern ("S_IROTH", SCM_MAKINUM (S_IROTH));
473	#endif
474	#ifdef S_IWOTH
475	scm_sysintern ("S_IWOTH", SCM_MAKINUM (S_IWOTH));
476	#endif
477	#ifdef S_IXOTH
478	scm_sysintern ("S_IXOTH", SCM_MAKINUM (S_IXOTH));
479	#endif
480	#ifdef S_IRWXO
481	scm_sysintern ("S_IRWXO", SCM_MAKINUM (S_IRWXO));
482	#endif
483
484	#ifdef S_ISUID
485	scm_sysintern ("S_ISUID", SCM_MAKINUM (S_ISUID));
486	#endif
487	#ifdef S_ISGID
488	scm_sysintern ("S_ISGID", SCM_MAKINUM (S_ISGID));
489	#endif
490	#ifdef S_ISVTX
491	scm_sysintern ("S_ISVTX", SCM_MAKINUM (S_ISVTX));
492	#endif
493
494	#ifdef S_IFMT
495	scm_sysintern ("S_IFMT", SCM_MAKINUM (S_IFMT));
496	#endif
497	#ifdef S_IFDIR
498	scm_sysintern ("S_IFDIR", SCM_MAKINUM (S_IFDIR));
499	#endif
500	#ifdef S_IFCHR
501	scm_sysintern ("S_IFCHR", SCM_MAKINUM (S_IFCHR));
502	#endif
503	#ifdef S_IFBLK
504	scm_sysintern ("S_IFBLK", SCM_MAKINUM (S_IFBLK));
505	#endif
506	#ifdef S_IFREG
507	scm_sysintern ("S_IFREG", SCM_MAKINUM (S_IFREG));
508	#endif
509	#ifdef S_IFLNK
510	scm_sysintern ("S_IFLNK", SCM_MAKINUM (S_IFLNK));
511	#endif
512	#ifdef S_IFSOCK
513	scm_sysintern ("S_IFSOCK", SCM_MAKINUM (S_IFSOCK));
514	#endif
515	#ifdef S_IFIFO
516	scm_sysintern ("S_IFIFO", SCM_MAKINUM (S_IFIFO));
517	#endif
518	#include "ioext.x"
519	}
520