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103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
/* Copyright (C) 1997-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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static void
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write_data (FILE *stream)
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{
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int i;
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for (i=0; i<100; i++)
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fprintf (stream, "%d\n", i);
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if (ferror (stream))
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{
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fprintf (stderr, "Output to stream failed.\n");
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exit (1);
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}
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}
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static void
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read_data (FILE *stream)
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{
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int i, j;
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for (i=0; i<100; i++)
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{
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if (fscanf (stream, "%d\n", &j) != 1 || j != i)
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{
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if (ferror (stream))
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perror ("fscanf");
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puts ("Test FAILED!");
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exit (1);
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}
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}
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}
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int
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main (void)
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{
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FILE *output, *input;
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int wstatus, rstatus;
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/* We must remove this entry to assure the `cat' binary does not use
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the perhaps incompatible new shared libraries. */
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unsetenv ("LD_LIBRARY_PATH");
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output = popen ("/bin/cat >/tmp/tstpopen.tmp", "w");
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if (output == NULL)
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{
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perror ("popen");
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puts ("Test FAILED!");
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exit (1);
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}
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write_data (output);
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wstatus = pclose (output);
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printf ("writing pclose returned %d\n", wstatus);
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input = popen ("/bin/cat /tmp/tstpopen.tmp", "r");
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if (input == NULL)
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{
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perror ("/tmp/tstpopen.tmp");
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puts ("Test FAILED!");
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exit (1);
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}
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read_data (input);
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rstatus = pclose (input);
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printf ("reading pclose returned %d\n", rstatus);
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remove ("/tmp/tstpopen.tmp");
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errno = 0;
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output = popen ("/bin/cat", "m");
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if (output != NULL)
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{
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puts ("popen called with illegal mode does not return NULL");
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puts ("Test FAILED!");
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exit (1);
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}
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if (errno != EINVAL)
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{
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puts ("popen called with illegal mode does not set errno to EINVAL");
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puts ("Test FAILED!");
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exit (1);
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}
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puts (wstatus | rstatus ? "Test FAILED!" : "Test succeeded.");
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return (wstatus | rstatus);
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}
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