gdb.base/fileio.c: Fix several -Wmaybe-uninitialized warnings

 src/gdb/testsuite/gdb.base/fileio.c: In function ‘test_write’:
 src/gdb/testsuite/gdb.base/fileio.c:158:5: warning: ‘ret’ may be used uninitialized in this function [-Wmaybe-uninitialized]
      printf ("write 1: ret = %d, errno = %d\n", ret, errno);
      ^

gdb/ChangeLog:
2017-05-18  Pedro Alves  <palves@redhat.com>

	* gdb.base/fileio.c (test_write, test_read, test_close)
	(test_fstat): Don't print 'ret' in the fail path.

2 files changed, 10 insertions, 5 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 428056ea85..c127f1adc5 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,5 +1,10 @@
 2017-05-18  Pedro Alves  <palves@redhat.com>
 
+	* gdb.base/fileio.c (test_write, test_read, test_close)
+	(test_fstat): Don't print 'ret' in the fail path.
+
+2017-05-18  Pedro Alves  <palves@redhat.com>
+
 	* gdb.base/fileio.c (stop, test_open, test_write, test_read)
 	(test_lseek, test_close, test_stat, test_fstat, test_isatty)
 	(test_system, test_rename, test_unlink, test_time): Change
diff --git a/gdb/testsuite/gdb.base/fileio.c b/gdb/testsuite/gdb.base/fileio.c
index 415f2d0c1b..7f482a34d3 100644
--- a/gdb/testsuite/gdb.base/fileio.c
+++ b/gdb/testsuite/gdb.base/fileio.c
@@ -157,7 +157,7 @@ test_write (void)
       close (fd);
     }
   else
-    printf ("write 1: ret = %d, errno = %d\n", ret, errno);
+    printf ("write 1: errno = %d\n", errno);
   stop ();
   /* Write using invalid file descriptor */
   errno = 0;
@@ -177,7 +177,7 @@ test_write (void)
       close (fd);
     }
   else
-    printf ("write 3: ret = %d, errno = %d\n", ret, errno);
+    printf ("write 3: errno = %d\n", errno);
   stop ();
 }
 
@@ -203,7 +203,7 @@ test_read (void)
       close (fd);
     }
   else
-    printf ("read 1: ret = %d, errno = %d\n", ret, errno);
+    printf ("read 1: errno = %d\n", errno);
   stop ();
   /* Read using invalid file descriptor */
   errno = 0;
@@ -271,7 +271,7 @@ test_close (void)
               ret == 0 ? "OK" : "");
     }
   else
-    printf ("close 1: ret = %d, errno = %d\n", ret, errno);
+    printf ("close 1: errno = %d\n", errno);
   stop ();
   /* Close an invalid file descriptor */
   errno = 0;
@@ -337,7 +337,7 @@ test_fstat (void)
       close (fd);
     }
   else
-    printf ("fstat 1: ret = %d, errno = %d\n", ret, errno);
+    printf ("fstat 1: errno = %d\n", errno);
   stop ();
   /* Fstat using invalid file descriptor */
   errno = 0;