Fix check_by_ssh interpretation of quotes in -C parameter (#1985246, #2268675)

1 files changed, 56 insertions, 16 deletions

diff --git a/plugins/check_by_ssh.c b/plugins/check_by_ssh.c
index d0dbf34..793c03d 100644
--- a/plugins/check_by_ssh.c
+++ b/plugins/check_by_ssh.c
@@ -31,12 +31,17 @@ const char *copyright = "2000-2008";
 const char *email = "nagiosplug-devel@lists.sourceforge.net";
 
 #include "common.h"
-#include "netutils.h"
 #include "utils.h"
-#include "runcmd.h"
+#include "netutils.h"
+#include "utils_cmd.h"
+
+#ifndef NP_MAXARGS
+#define NP_MAXARGS 1024
+#endif
 
 int process_arguments (int, char **);
 int validate_arguments (void);
+void comm_append (const char *);
 void print_help (void);
 void print_usage (void);
 
@@ -45,7 +50,8 @@ unsigned int services = 0;
 int skip_stdout = 0;
 int skip_stderr = 0;
 char *remotecmd = NULL;
-char *comm = NULL;
+char **commargv = NULL;
+int commargc = 0;
 char *hostname = NULL;
 char *outputfile = NULL;
 char *host_shortname = NULL;
@@ -63,10 +69,10 @@ main (int argc, char **argv)
         int i;
         time_t local_time;
         FILE *fp = NULL;
-        struct output chld_out, chld_err;
+        output chld_out, chld_err;
 
         remotecmd = "";
-        comm = strdup (SSH_COMMAND);
+        comm_append(SSH_COMMAND);
 
         setlocale (LC_ALL, "");
         bindtextdomain (PACKAGE, LOCALEDIR);
@@ -80,16 +86,19 @@ main (int argc, char **argv)
                 usage_va(_("Could not parse arguments"));
 
         /* Set signal handling and alarm timeout */
-        if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR) {
+        if (signal (SIGALRM, timeout_alarm_handler) == SIG_ERR) {
                 usage_va(_("Cannot catch SIGALRM"));
         }
         alarm (timeout_interval);
 
         /* run the command */
-        if (verbose)
-                printf ("%s\n", comm);
+        if (verbose) {
+                printf ("Command: %s\n", commargv[0]);
+                for (i=1; i<commargc; i++)
+                        printf ("Argument %i: %s\n", i, commargv[i]);
+        }
 
-        result = np_runcmd(comm, &chld_out, &chld_err, 0);
+        result = cmd_run_array (commargv, &chld_out, &chld_err, 0);
 
         if (skip_stdout == -1) /* --skip-stdout specified without argument */
                 skip_stdout = chld_out.lines;
@@ -218,7 +227,8 @@ process_arguments (int argc, char **argv)
                 case 'p': /* port number */
                         if (!is_integer (optarg))
                                 usage_va(_("Port must be a positive integer"));
-                        asprintf (&comm,"%s -p %s", comm, optarg);
+                        comm_append("-p");
+                        comm_append(optarg);
                         break;
                 case 'O':                                                                       /* output file */
                         outputfile = optarg;
@@ -240,18 +250,32 @@ process_arguments (int argc, char **argv)
                         break;
 
                 case 'u':
-                        c = 'l';
+                        comm_append("-l");
+                        comm_append(optarg);
+                        break;
                 case 'l':                                                                       /* login name */
+                        comm_append("-l");
+                        comm_append(optarg);
+                        break;
                 case 'i':                                                                       /* identity */
-                        asprintf (&comm, "%s -%c %s", comm, c, optarg);
+                        comm_append("-i");
+                        comm_append(optarg);
                         break;
 
                 case '1':                                                                       /* Pass these switches directly to ssh */
+                        comm_append("-1");
+                        break;
                 case '2':                                                                       /* 1 to force version 1, 2 to force version 2 */
+                        comm_append("-2");
+                        break;
                 case '4':                                                                       /* -4 for IPv4 */
+                        comm_append("-4");
+                        break;
                 case '6':                                                               /* -6 for IPv6 */
+                        comm_append("-6");
+                        break;
                 case 'f':                                                                       /* fork to background */
-                        asprintf (&comm, "%s -%c", comm, c);
+                        comm_append("-f");
                         break;
                 case 'C':                                                                       /* Command for remote machine */
                         commands++;
@@ -276,10 +300,11 @@ process_arguments (int argc, char **argv)
                                 skip_stderr = atoi (optarg);
                         break;
                 case 'o':                                                                       /* Extra options for the ssh command */
-                        asprintf (&comm, "%s -%c '%s'", comm, c, optarg);
+                        comm_append("-o");
+                        comm_append(optarg);
                         break;
                 case 'q':                                                                       /* Tell the ssh command to be quiet */
-                        asprintf (&comm, "%s -%c", comm, c);
+                        comm_append("-q");
                         break;
                 default:                                                                        /* help */
                         usage5();
@@ -309,12 +334,27 @@ process_arguments (int argc, char **argv)
         if (remotecmd == NULL || strlen (remotecmd) <= 1)
                 usage_va(_("No remotecmd"));
 
-        asprintf (&comm, "%s %s '%s'", comm, hostname, remotecmd);
+        comm_append(hostname);
+        comm_append(remotecmd);
 
         return validate_arguments ();
 }
 
 
+void
+comm_append (const char *str)
+{
+
+        if (++commargc > NP_MAXARGS)
+                die(STATE_UNKNOWN, _("%s: Argument limit of %d exceeded\n"), progname, NP_MAXARGS);
+
+        if ((commargv = (char **)realloc(commargv, (commargc+1) * sizeof(char *))) == NULL)
+                die(STATE_UNKNOWN, _("Can not (re)allocate 'commargv' buffer\n"));
+
+        commargv[commargc-1] = strdup(str);
+        commargv[commargc] = NULL;
+
+}
 
 int
 validate_arguments (void)