tests: fix warn unused results

With fortification enabled, few function calls return result need to be
checked, has they get the __wur macro enabled.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>

2 files changed, 9 insertions, 3 deletions

diff --git a/sysdeps/pthread/tst-cancel16.c b/sysdeps/pthread/tst-cancel16.c
index 511b9e1e91..d47c7c68cb 100644
--- a/sysdeps/pthread/tst-cancel16.c
+++ b/sysdeps/pthread/tst-cancel16.c
@@ -50,7 +50,11 @@ tf (void *arg)
   pthread_cleanup_push (cl, NULL);
 
   /* This call should never return.  */
-  (void) lockf (fd, F_LOCK, 0);
+  if (lockf (fd, F_LOCK, 0))
+    {
+      puts ("child thread: lockf failed");
+      exit (1);
+    }
 
   pthread_cleanup_pop (0);
 
diff --git a/sysdeps/pthread/tst-cancel4.c b/sysdeps/pthread/tst-cancel4.c
index 4f5c89314c..4c9e8670ca 100644
--- a/sysdeps/pthread/tst-cancel4.c
+++ b/sysdeps/pthread/tst-cancel4.c
@@ -1009,7 +1009,8 @@ tf_pread (void *arg)
   pthread_cleanup_push (cl, NULL);
 
   char mem[10];
-  pread (tempfd, mem, sizeof (mem), 0);
+  if (pread (tempfd, mem, sizeof (mem), 0) < 0)
+    FAIL_EXIT1 ("pread failed: %m");
 
   pthread_cleanup_pop (0);
 
@@ -1038,7 +1039,8 @@ tf_pwrite (void *arg)
   pthread_cleanup_push (cl, NULL);
 
   char mem[10];
-  pwrite (tempfd, mem, sizeof (mem), 0);
+  if (pwrite (tempfd, mem, sizeof (mem), 0) <0)
+    FAIL_EXIT1 ("pwrite failed: %m");
 
   pthread_cleanup_pop (0);