glibc/stdio-common/test-popen.c
Andreas Jaeger 41bdb6e20c Update to LGPL v2.1.
2001-07-06  Paul Eggert  <eggert@twinsun.com>

	* manual/argp.texi: Remove ignored LGPL copyright notice; it's
	not appropriate for documentation anyway.
	* manual/libc-texinfo.sh: "Library General Public License" ->
	"Lesser General Public License".

2001-07-06  Andreas Jaeger  <aj@suse.de>

	* All files under GPL/LGPL version 2: Place under LGPL version
	2.1.
2001-07-06 04:58:11 +00:00

104 lines
2.6 KiB
C

/* Copyright (C) 1997, 1998, 2000 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 <errno.h>
#include <stdio.h>
#include <stdlib.h>
static void
write_data (FILE *stream)
{
int i;
for (i=0; i<100; i++)
fprintf (stream, "%d\n", i);
if (ferror (stream))
{
fprintf (stderr, "Output to stream failed.\n");
exit (1);
}
}
static void
read_data (FILE *stream)
{
int i, j;
for (i=0; i<100; i++)
{
if (fscanf (stream, "%d\n", &j) != 1 || j != i)
{
if (ferror (stream))
perror ("fscanf");
puts ("Test FAILED!");
exit (1);
}
}
}
int
main (void)
{
FILE *output, *input;
int wstatus, rstatus;
/* We must remove this entry to assure the `cat' binary does not use
the perhaps incompatible new shared libraries. */
unsetenv ("LD_LIBRARY_PATH");
output = popen ("/bin/cat >/tmp/tstpopen.tmp", "w");
if (output == NULL)
{
perror ("popen");
puts ("Test FAILED!");
exit (1);
}
write_data (output);
wstatus = pclose (output);
printf ("writing pclose returned %d\n", wstatus);
input = popen ("/bin/cat /tmp/tstpopen.tmp", "r");
if (input == NULL)
{
perror ("/tmp/tstpopen.tmp");
puts ("Test FAILED!");
exit (1);
}
read_data (input);
rstatus = pclose (input);
printf ("reading pclose returned %d\n", rstatus);
remove ("/tmp/tstpopen.tmp");
errno = 0;
output = popen ("/bin/cat", "m");
if (output != NULL)
{
puts ("popen called with illegal mode does not return NULL");
puts ("Test FAILED!");
exit (1);
}
if (errno != EINVAL)
{
puts ("popen called with illegal mode does not set errno to EINVAL");
puts ("Test FAILED!");
exit (1);
}
puts (wstatus | rstatus ? "Test FAILED!" : "Test succeeded.");
return (wstatus | rstatus);
}