glibc/sysdeps/generic/pipestream.c

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/* Copyright (C) 1991, 1993, 1995, 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stddef.h>
#include <signal.h>
#include <stdio.h>
#include <errno.h>
/* Open a new stream that is a one-way pipe to a
child process running the given shell command. */
FILE *
popen (command, mode)
const char *command;
const char *mode;
{
if (command == NULL || mode == NULL || (*mode != 'r' && *mode != 'w'))
{
__set_errno (EINVAL);
return NULL;
}
__set_errno (ENOSYS);
return NULL;
}
/* Close a stream opened by popen and return its status.
Returns -1 if the stream was not opened by popen. */
int
pclose (stream)
register FILE *stream;
{
if (!__validfp (stream) || !stream->__ispipe)
{
__set_errno (EINVAL);
return -1;
}
__set_errno (ENOSYS);
return -1;
}
stub_warning (popen)
stub_warning (pclose)
#include <stub-tag.h>