[PATCH] test-skeleton.c: Use stdout for error messages

[Will Newton <will dot newton at linaro dot org>]

At the moment the test skeleton uses a mixture of stdout and
stderr for error message output. Using stdout for all test output
keeps all output correctly ordered and properly redirected to the
output file. The suggestion to use stdout is also made on the wiki:

https://sourceware.org/glibc/wiki/Testing/Testsuite#Writing_a_test_case

ChangeLog:

2014-04-11  Will Newton  <will.newton@linaro.org>

	* test-skeleton.c (signal_handler): Use printf and strerror
	rather than perror.  Use printf rather than fprintf to
	stderr.
	(main): Likewise.
---
 test-skeleton.c | 44 +++++++++++++++++++++-----------------------
 1 file changed, 21 insertions(+), 23 deletions(-)

diff --git a/test-skeleton.c b/test-skeleton.c
index d7d2f75..dd7de8b 100644
--- a/test-skeleton.c
+++ b/test-skeleton.c
@@ -160,7 +160,7 @@ signal_handler (int sig __attribute__ ((unused)))
     }
   if (killed != 0 && killed != pid)
     {
-      perror ("Failed to kill test process");
+      printf ("Failed to kill test process: %s\n", strerror (errno));
       exit (1);
     }
 
@@ -181,16 +181,16 @@ signal_handler (int sig __attribute__ ((unused)))
 #endif
 
   if (killed == 0 || (WIFSIGNALED (status) && WTERMSIG (status) == SIGKILL))
-    fputs ("Timed out: killed the child process\n", stderr);
+    puts ("Timed out: killed the child process\n");
   else if (WIFSTOPPED (status))
-    fprintf (stderr, "Timed out: the child process was %s\n",
-	     strsignal (WSTOPSIG (status)));
+    printf ("Timed out: the child process was %s\n",
+	    strsignal (WSTOPSIG (status)));
   else if (WIFSIGNALED (status))
-    fprintf (stderr, "Timed out: the child process got signal %s\n",
-	     strsignal (WTERMSIG (status)));
+    printf ("Timed out: the child process got signal %s\n",
+	    strsignal (WTERMSIG (status)));
   else
-    fprintf (stderr, "Timed out: killed the child process but it exited %d\n",
-	     WEXITSTATUS (status));
+    printf ("Timed out: killed the child process but it exited %d\n",
+	    WEXITSTATUS (status));
 
   /* Exit with an error.  */
   exit (1);
@@ -275,7 +275,7 @@ main (int argc, char *argv[])
 
       if (chdir (test_dir) < 0)
 	{
-	  perror ("chdir");
+	  printf ("chdir: %s\n", strerror (errno));
 	  exit (1);
 	}
     }
@@ -334,10 +334,10 @@ main (int argc, char *argv[])
 	    data_limit.rlim_cur = MIN ((rlim_t) TEST_DATA_LIMIT,
 				       data_limit.rlim_max);
 	  if (setrlimit (RLIMIT_DATA, &data_limit) < 0)
-	    perror ("setrlimit: RLIMIT_DATA");
+	    printf ("setrlimit: RLIMIT_DATA: %s\n", strerror (errno));
 	}
       else
-	perror ("getrlimit: RLIMIT_DATA");
+	printf ("getrlimit: RLIMIT_DATA: %s\n", strerror (errno));
 #endif
 
       /* We put the test process in its own pgrp so that if it bogusly
@@ -349,7 +349,7 @@ main (int argc, char *argv[])
     }
   else if (pid < 0)
     {
-      perror ("Cannot fork test program");
+      printf ("Cannot fork test program: %s\n", strerror (errno));
       exit (1);
     }
 
@@ -387,18 +387,16 @@ main (int argc, char *argv[])
       if (EXPECTED_SIGNAL != 0)
 	{
 	  if (WTERMSIG (status) == 0)
-	    fprintf (stderr,
-		     "Expected signal '%s' from child, got none\n",
-		     strsignal (EXPECTED_SIGNAL));
+	    printf ("Expected signal '%s' from child, got none\n",
+		    strsignal (EXPECTED_SIGNAL));
 	  else
-	    fprintf (stderr,
-		     "Incorrect signal from child: got `%s', need `%s'\n",
-		     strsignal (WTERMSIG (status)),
-		     strsignal (EXPECTED_SIGNAL));
+	    printf ("Incorrect signal from child: got `%s', need `%s'\n",
+		    strsignal (WTERMSIG (status)),
+		    strsignal (EXPECTED_SIGNAL));
 	}
       else
-	fprintf (stderr, "Didn't expect signal from child: got `%s'\n",
-		 strsignal (WTERMSIG (status)));
+	printf ("Didn't expect signal from child: got `%s'\n",
+		strsignal (WTERMSIG (status)));
       exit (1);
     }
 
@@ -408,8 +406,8 @@ main (int argc, char *argv[])
 #else
   if (WEXITSTATUS (status) != EXPECTED_STATUS)
     {
-      fprintf (stderr, "Expected status %d, got %d\n",
-	       EXPECTED_STATUS, WEXITSTATUS (status));
+      printf ("Expected status %d, got %d\n",
+	      EXPECTED_STATUS, WEXITSTATUS (status));
       exit (1);
     }
 
-- 
1.8.1.4