cli: check for null in is_server_debug_xlator()

Command: gluster volume set <volname> diagnostics.client-log-level trace
Expected output:
"volume set: failed: option log-level trace: 'trace' is not valid
(possible options are DEBUG, WARNING, ERROR, INFO, CRITICAL, NONE,
TRACE.)"
Current output: gluster cli receives a segmentation fault
Fix: check for NULL before calling strstr

Change-Id: If4c7a85a635849a388cf122543e12349c109643c
BUG: 982174
Signed-off-by: Ravishankar N <ravishankar@redhat.com>
Reviewed-on: http://review.gluster.org/5298
Reviewed-by: Kaushal M <kaushal@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/tests/bugs/bug-982174.t b/tests/bugs/bug-982174.t
new file mode 100644
index 00000000000..460af751170
--- /dev/null
+++ b/tests/bugs/bug-982174.t
@@ -0,0 +1,36 @@
+#!/bin/bash
+# Test to check
+. $(dirname $0)/../include.rc
+. $(dirname $0)/../volume.rc
+
+#Check if incorrect log-level keywords does not crash the CLI
+cleanup;
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 $H0:$B0/brick1 $H0:$B0/brick2
+TEST $CLI volume start $V0
+
+function set_log_level_status {
+        local level=$1
+        $CLI volume set $V0 diagnostics.client-log-level $level 2>&1 |grep -oE 'success|failed'
+}
+
+
+LOG_LEVEL="trace"
+EXPECT "failed" set_log_level_status $LOG_LEVEL
+
+
+LOG_LEVEL="error-gen"
+EXPECT "failed" set_log_level_status $LOG_LEVEL
+
+
+LOG_LEVEL="TRACE"
+EXPECT "success" set_log_level_status $LOG_LEVEL
+
+EXPECT "$LOG_LEVEL" echo `$CLI volume info | grep diagnostics | awk '{print $2}'`
+
+TEST $CLI volume stop $V0;
+TEST $CLI volume delete $V0;
+
+cleanup;