1 files changed, 12 insertions, 2 deletions

diff --git a/plugins/check_by_ssh.c b/plugins/check_by_ssh.c
index 485bf3b..39d4907 100644
--- a/plugins/check_by_ssh.c
+++ b/plugins/check_by_ssh.c
@@ -49,6 +49,7 @@ unsigned int commands = 0;
 unsigned int services = 0;
 int skip_stdout = 0;
 int skip_stderr = 0;
+int warn_on_stderr = 0;
 char *remotecmd = NULL;
 char **commargv = NULL;
 int commargc = 0;
@@ -116,7 +117,10 @@ main (int argc, char **argv)
         if(chld_err.lines > skip_stderr) {
                 printf (_("Remote command execution failed: %s\n"),
                         chld_err.line[skip_stderr]);
-                return max_state_alt(result, STATE_UNKNOWN);
+                if ( warn_on_stderr ) 
+                        return max_state_alt(result, STATE_WARNING);
+                else
+                        return max_state_alt(result, STATE_UNKNOWN);
         }
 
         /* this is simple if we're not supposed to be passive.
@@ -189,6 +193,7 @@ process_arguments (int argc, char **argv)
                 {"skip", optional_argument, 0, 'S'}, /* backwards compatibility */
                 {"skip-stdout", optional_argument, 0, 'S'},
                 {"skip-stderr", optional_argument, 0, 'E'},
+                {"warn-on-stderr", no_argument, 0, 'W'},
                 {"proto1", no_argument, 0, '1'},
                 {"proto2", no_argument, 0, '2'},
                 {"use-ipv4", no_argument, 0, '4'},
@@ -307,6 +312,9 @@ process_arguments (int argc, char **argv)
                         else
                                 skip_stderr = atoi (optarg);
                         break;
+                case 'W':                                                                       /* exit with warning if there is an output on stderr */
+                        warn_on_stderr = 1;
+                        break;
                 case 'o':                                                                       /* Extra options for the ssh command */
                         comm_append("-o");
                         comm_append(optarg);
@@ -413,6 +421,8 @@ print_help (void)
   printf ("    %s\n", _("Ignore all or (if specified) first n lines on STDOUT [optional]"));
   printf (" %s\n", "-E, --skip-stderr[=n]");
   printf ("    %s\n", _("Ignore all or (if specified) first n lines on STDERR [optional]"));
+  printf (" %s\n", "-W, --warn-on-stderr]");
+  printf ("    %s\n", _("Exit with an warning, if there is an output on STDERR"));
   printf (" %s\n", "-f");
   printf ("    %s\n", _("tells ssh to fork rather than create a tty [optional]. This will always return OK if ssh is executed"));
   printf (" %s\n","-C, --command='COMMAND STRING'");
@@ -465,7 +475,7 @@ print_usage (void)
 {
         printf ("%s\n", _("Usage:"));
         printf (" %s -H <host> -C <command> [-fqv] [-1|-2] [-4|-6]\n"
-                "       [-S [lines]] [-E [lines]] [-t timeout] [-i identity]\n"
+                "       [-S [lines]] [-E [lines]] [-W] [-t timeout] [-i identity]\n"
                 "       [-l user] [-n name] [-s servicelist] [-O outputfile]\n"
                 "       [-p port] [-o ssh-option] [-F configfile]\n",
                 progname);