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56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/* Pipe to a Subprocess
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Copyright (C) 1991-2017 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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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 (EXIT_FAILURE);
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}
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}
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/*@group*/
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int
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main (void)
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{
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FILE *output;
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output = popen ("more", "w");
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if (!output)
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{
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fprintf (stderr,
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"incorrect parameters or too many files.\n");
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return EXIT_FAILURE;
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}
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write_data (output);
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if (pclose (output) != 0)
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{
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fprintf (stderr,
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"Could not run more or other error.\n");
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}
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return EXIT_SUCCESS;
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}
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/*@end group*/
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