1 /* Test of SIGPIPE handling.
2 Copyright (C) 2008-2012 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, see <http://www.gnu.org/licenses/>. */
21 /* Check that SIGPIPE is defined. */
36 main (int argc, char **argv)
38 char mode = argv[1][0];
42 case 'A': signal (SIGPIPE, SIG_DFL); break;
43 case 'B': signal (SIGPIPE, SIG_IGN); break;
44 case 'C': signal (SIGPIPE, handler); break;
47 /* Produce infinite output. Since it is piped into "head -1", the writes
48 must ultimately fail. */
51 char c[2] = { 'y', '\n' };
52 int ret = write (1, c, sizeof (c));
57 case 'B': /* The write() call should have failed with EPIPE. */
58 if (ret < 0 && errno == EPIPE)
61 case 'A': /* The process should silently die. */
62 case 'C': /* The handler should have been called. */
63 fprintf (stderr, "write() returned %d with error %d.\n", ret, errno);