From 23c11479b3ad787adc7a651ee0c4347839e47723 Mon Sep 17 00:00:00 2001
From: Lorry Tar Creator <lorry-tar-importer@baserock.org>
Date: Sun, 22 Sep 2013 07:04:10 +0000
Subject: Imported from
 /home/lorry/working-area/delta_m4-tarball/m4-1.4.17.tar.xz.

---
 tests/test-sigpipe.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 tests/test-sigpipe.c

(limited to 'tests/test-sigpipe.c')

diff --git a/tests/test-sigpipe.c b/tests/test-sigpipe.c
new file mode 100644
index 0000000..e09294a
--- /dev/null
+++ b/tests/test-sigpipe.c
@@ -0,0 +1,68 @@
+/* Test of SIGPIPE handling.
+   Copyright (C) 2008-2013 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 3, 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, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <signal.h>
+
+/* Check that SIGPIPE is defined.  */
+int s = SIGPIPE;
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+static void
+handler (int sig)
+{
+  exit (0);
+}
+
+int
+main (int argc, char **argv)
+{
+  char mode = argv[1][0];
+
+  switch (mode)
+    {
+    case 'A': signal (SIGPIPE, SIG_DFL); break;
+    case 'B': signal (SIGPIPE, SIG_IGN); break;
+    case 'C': signal (SIGPIPE, handler); break;
+    }
+
+  /* Produce infinite output.  Since it is piped into "head -1", the writes
+     must ultimately fail.  */
+  for (;;)
+    {
+      char c[2] = { 'y', '\n' };
+      int ret = write (1, c, sizeof (c));
+      if (ret <= 0)
+        {
+          switch (mode)
+            {
+            case 'B': /* The write() call should have failed with EPIPE.  */
+              if (ret < 0 && errno == EPIPE)
+                exit (0);
+              /*FALLTHROUGH*/
+            case 'A': /* The process should silently die.  */
+            case 'C': /* The handler should have been called.  */
+              fprintf (stderr, "write() returned %d with error %d.\n", ret, errno);
+              exit (1);
+            }
+        }
+    }
+}
-- 
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