# HG changeset patch
# User Bruno Haible <bruno@clisp.org>
# Date 1316386929 -7200
# Node ID 66bab2a591f5654a2a2c13ef60789af3df51f2eb
# Parent  1f810b97845d02686d569d3b9379c63fc96e3338
ptsname tests: Let the test fail rather than hang (e.g. on AIX 5.1).

* tests/test-ptsname.c (main): Terminate the test if it takes longer
than 5 seconds.
* modules/ptsname-tests (configure.ac): Test for alarm.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2011-09-18  Bruno Haible  <bruno@clisp.org>
+
+	ptsname tests: Let the test fail rather than hang (e.g. on AIX 5.1).
+	* tests/test-ptsname.c (main): Terminate the test if it takes longer
+	than 5 seconds.
+	* modules/ptsname-tests (configure.ac): Test for alarm.
+
 2011-09-18  Bruno Haible  <bruno@clisp.org>
 
 	posix_spawn_file_actions_add*: Fix module dependencies.
diff --git a/modules/ptsname-tests b/modules/ptsname-tests
--- a/modules/ptsname-tests
+++ b/modules/ptsname-tests
@@ -7,6 +7,7 @@
 same-inode
 
 configure.ac:
+AC_CHECK_DECLS_ONCE([alarm])
 
 Makefile.am:
 TESTS += test-ptsname
diff --git a/tests/test-ptsname.c b/tests/test-ptsname.c
--- a/tests/test-ptsname.c
+++ b/tests/test-ptsname.c
@@ -22,6 +22,7 @@
 SIGNATURE_CHECK (ptsname, char *, (int));
 
 #include <fcntl.h>
+#include <signal.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
@@ -54,6 +55,13 @@
 int
 main (void)
 {
+#if HAVE_DECL_ALARM
+  /* Declare failure if test takes too long, by using default abort
+     caused by SIGALRM.  */
+  signal (SIGALRM, SIG_DFL);
+  alarm (5);
+#endif
+
   {
     int fd;
     char *result;