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-rw-r--r--ChangeLog7
-rw-r--r--support/support_test_main.c3
-rw-r--r--support/test-driver.c4
-rw-r--r--support/test-driver.h1
4 files changed, 14 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index 664928d5fe..9843e137f5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
 2018-06-26  Florian Weimer  <fweimer@redhat.com>
 
+	* support/support_test_main.c (support_test_main): Only call
+	setvbuf if not disables.
+	* support/test-driver.c (main): Check TEST_NO_SETVBUF.
+	* support/test-driver.h (struct test_config): Add no_setvbuf member.
+
+2018-06-26  Florian Weimer  <fweimer@redhat.com>
+
 	[BZ #23313]
 	* libio/vtables.c (check_stdfiles_vtables): New ELF constructor.
 
diff --git a/support/support_test_main.c b/support/support_test_main.c
index 396385729b..23429779ac 100644
--- a/support/support_test_main.c
+++ b/support/support_test_main.c
@@ -270,7 +270,8 @@ support_test_main (int argc, char **argv, const struct test_config *config)
     timeout =  DEFAULT_TIMEOUT;
 
   /* Make sure we see all message, even those on stdout.  */
-  setvbuf (stdout, NULL, _IONBF, 0);
+  if (!config->no_setvbuf)
+    setvbuf (stdout, NULL, _IONBF, 0);
 
   /* Make sure temporary files are deleted.  */
   if (support_delete_temp_files != NULL)
diff --git a/support/test-driver.c b/support/test-driver.c
index 09c8783e4f..9798f16227 100644
--- a/support/test-driver.c
+++ b/support/test-driver.c
@@ -140,6 +140,10 @@ main (int argc, char **argv)
   test_config.no_mallopt = 1;
 #endif
 
+#ifdef TEST_NO_SETVBUF
+  test_config.no_setvbuf = 1;
+#endif
+
 #ifdef TIMEOUT
   test_config.timeout = TIMEOUT;
 #endif
diff --git a/support/test-driver.h b/support/test-driver.h
index 1708d68d60..549179b254 100644
--- a/support/test-driver.h
+++ b/support/test-driver.h
@@ -35,6 +35,7 @@ struct test_config
   int expected_status;   /* Expected exit status.  */
   int expected_signal;   /* If non-zero, expect termination by signal.  */
   char no_mallopt;       /* Boolean flag to disable mallopt.  */
+  char no_setvbuf;       /* Boolean flag to disable setvbuf.  */
   const char *optstring; /* Short command line options.  */
 };