From ceabceacb175fe3e37d05ba7cbe74aa502115adb Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Mon, 19 Sep 2011 01:02:09 +0200
Subject: [PATCH] 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.
---
 ChangeLog             | 7 +++++++
 modules/ptsname-tests | 1 +
 tests/test-ptsname.c  | 8 ++++++++
 3 files changed, 16 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index e73f7d413..f9d52f481 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
 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.
 	* modules/posix_spawn_file_actions_addclose (Dependencies): Add
 	posix_spawn_file_actions_init.
diff --git a/modules/ptsname-tests b/modules/ptsname-tests
index 344b8a703..e26bc9e5c 100644
--- a/modules/ptsname-tests
+++ b/modules/ptsname-tests
@@ -7,6 +7,7 @@ Depends-on:
 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
index ccf2ab1b5..921367cc1 100644
--- 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 @@ same_slave (const char *slave_name1, const char *slave_name2)
 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;
-- 
2.11.0