/* 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); }