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/* Copyright (C) 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <stdio.h>
#include <stdlib.h>
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);
}
}
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.");
exit (wstatus | rstatus);
}
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