sysdeps/generic/pipestream.c

   1 /* Copyright (C) 1991, 1993, 1995, 1996, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <stddef.h>
  20 #include <signal.h>
  21 #include <stdio.h>
  22 #include <errno.h>
  23
  24
  25 /* Open a new stream that is a one-way pipe to a
  26    child process running the given shell command.  */
  27 FILE *
  28 popen (command, mode)
  29      const char *command;
  30      const char *mode;
  31 {
  32   if (command == NULL || mode == NULL || (*mode != 'r' && *mode != 'w'))
  33     {
  34       __set_errno (EINVAL);
  35       return NULL;
  36     }
  37
  38   __set_errno (ENOSYS);
  39   return NULL;
  40 }
  41 \f
  42 /* Close a stream opened by popen and return its status.
  43    Returns -1 if the stream was not opened by popen.  */
  44 int
  45 pclose (stream)
  46      register FILE *stream;
  47 {
  48   if (!__validfp (stream) || !stream->__ispipe)
  49     {
  50       __set_errno (EINVAL);
  51       return -1;
  52     }
  53
  54   __set_errno (ENOSYS);
  55   return -1;
  56 }
  57
  58 stub_warning (popen)
  59 stub_warning (pclose)
  60 #include <stub-tag.h>