tests: make it easier to bypass alarm time in debugger

While auditing alarm usage, I noticed that test-regex had a nice
idiom that made it easier to disable an alarm under glibc.  Use
it elsewhere, so future copy-and-paste will preserve the idiom.

* tests/test-file-has-acl.c (main): Allow gdb to override alarm.
* tests/test-memmem.c (main): Likewise.
* tests/test-passfd.c (main): Likewise.
* tests/test-ptsname.c (main): Likewise.
* tests/test-ptsname_r.c (main): Likewise.
* tests/test-strcasestr.c (main): Likewise.
* tests/test-strstr.c (main): Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>

7 files changed, 17 insertions, 8 deletions

diff --git a/tests/test-file-has-acl.c b/tests/test-file-has-acl.c
index a9bfd50cd8..56cc3baf0b 100644
--- a/tests/test-file-has-acl.c
+++ b/tests/test-file-has-acl.c
@@ -49,8 +49,11 @@ main (int argc, char *argv[])
 #if HAVE_DECL_ALARM
   /* Declare failure if test takes too long, by using default abort
      caused by SIGALRM.  */
-  signal (SIGALRM, SIG_DFL);
-  alarm (5);
+  {
+    int alarm_value = 5;
+    signal (SIGALRM, SIG_DFL);
+    alarm (alarm_value);
+  }
 #endif
 
 #if USE_ACL
diff --git a/tests/test-memmem.c b/tests/test-memmem.c
index 6b3325b487..97ae7c1634 100644
--- a/tests/test-memmem.c
+++ b/tests/test-memmem.c
@@ -43,8 +43,9 @@ main (int argc, char *argv[])
      caused by SIGALRM.  All known platforms that lack alarm also lack
      memmem, and the replacement memmem is known to not take too
      long.  */
+  int alarm_value = 100;
   signal (SIGALRM, SIG_DFL);
-  alarm (100);
+  alarm (alarm_value);
 #endif
 
   {
diff --git a/tests/test-passfd.c b/tests/test-passfd.c
index c11a82859f..6389e154ee 100644
--- a/tests/test-passfd.c
+++ b/tests/test-passfd.c
@@ -45,8 +45,9 @@ main ()
 
 # if HAVE_DECL_ALARM
   /* Avoid hanging on failure.  */
+  int alarm_value = 5;
   signal (SIGALRM, SIG_DFL);
-  alarm (5);
+  alarm (alarm_value);
 # endif
 
   fdnull = open ("/dev/null", O_RDWR);
diff --git a/tests/test-ptsname.c b/tests/test-ptsname.c
index 29cf72cfb4..15d4925bae 100644
--- a/tests/test-ptsname.c
+++ b/tests/test-ptsname.c
@@ -59,8 +59,9 @@ main (void)
 #if HAVE_DECL_ALARM
   /* Declare failure if test takes too long, by using default abort
      caused by SIGALRM.  */
+  int alarm_value = 5;
   signal (SIGALRM, SIG_DFL);
-  alarm (5);
+  alarm (alarm_value);
 #endif
 
   {
diff --git a/tests/test-ptsname_r.c b/tests/test-ptsname_r.c
index acc3c94cc8..b194303815 100644
--- a/tests/test-ptsname_r.c
+++ b/tests/test-ptsname_r.c
@@ -104,8 +104,9 @@ main (void)
 #if HAVE_DECL_ALARM
   /* Declare failure if test takes too long, by using default abort
      caused by SIGALRM.  */
+  int alarm_value = 5;
   signal (SIGALRM, SIG_DFL);
-  alarm (5);
+  alarm (alarm_value);
 #endif
 
   {
diff --git a/tests/test-strcasestr.c b/tests/test-strcasestr.c
index 0ca36921f1..df75e789be 100644
--- a/tests/test-strcasestr.c
+++ b/tests/test-strcasestr.c
@@ -37,8 +37,9 @@ main ()
      caused by SIGALRM.  All known platforms that lack alarm also lack
      strcasestr, and the replacement strcasestr is known to not take too
      long.  */
+  int alarm_value = 50;
   signal (SIGALRM, SIG_DFL);
-  alarm (50);
+  alarm (alarm_value);
 #endif
 
   {
diff --git a/tests/test-strstr.c b/tests/test-strstr.c
index 2d2cea1a98..80e809317f 100644
--- a/tests/test-strstr.c
+++ b/tests/test-strstr.c
@@ -37,8 +37,9 @@ main (int argc, char *argv[])
      caused by SIGALRM.  All known platforms that lack alarm also have
      a quadratic strstr, and the replacement strstr is known to not
      take too long.  */
+  int alarm_value = 50;
   signal (SIGALRM, SIG_DFL);
-  alarm (50);
+  alarm (alarm_value);
 #endif
 
   {