avoid segfault when host is not given

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@240 f882894a-f735-0410-b71e-b25c423dba1c

1 files changed, 7 insertions, 2 deletions

diff --git a/plugins/check_by_ssh.c b/plugins/check_by_ssh.c
index 5c50530..34e6727 100644
--- a/plugins/check_by_ssh.c
+++ b/plugins/check_by_ssh.c
@@ -283,14 +283,19 @@ process_arguments (int argc, char **argv)
 
         c = optind;
         if (hostname == NULL) {
-                if (!is_host (argv[c]))
+                if (c <= argc) {
+                        terminate (STATE_UNKNOWN, "%s: You must provide a host name\n", progname);
+                } else if (!is_host (argv[c]))
                         terminate (STATE_UNKNOWN, "%s: Invalid host name %s\n", progname, argv[c]);
                 hostname = argv[c++];
         }
 
         if (strlen(remotecmd) == 0) {
                 for (; c < argc; c++)
-                        asprintf (&remotecmd, "%s %s", remotecmd, argv[c]);
+                        if (strlen(remotecmd) > 0)
+                                asprintf (&remotecmd, "%s %s", remotecmd, argv[c]);
+                        else
+                                asprintf (&remotecmd, "%s", argv[c]);
         }
 
         if (commands > 1)