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Diffstat (limited to 'REORG.TODO/manual/examples/popen.c')
-rw-r--r-- | REORG.TODO/manual/examples/popen.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/REORG.TODO/manual/examples/popen.c b/REORG.TODO/manual/examples/popen.c new file mode 100644 index 0000000000..cc7617c65c --- /dev/null +++ b/REORG.TODO/manual/examples/popen.c @@ -0,0 +1,55 @@ +/* Pipe to a Subprocess + Copyright (C) 1991-2017 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License + as published by the Free Software Foundation; either version 2 + of the License, or (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, if not, see <http://www.gnu.org/licenses/>. +*/ + +#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 (EXIT_FAILURE); + } +} + +/*@group*/ +int +main (void) +{ + FILE *output; + + output = popen ("more", "w"); + if (!output) + { + fprintf (stderr, + "incorrect parameters or too many files.\n"); + return EXIT_FAILURE; + } + write_data (output); + if (pclose (output) != 0) + { + fprintf (stderr, + "Could not run more or other error.\n"); + } + return EXIT_SUCCESS; +} +/*@end group*/ |