![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/plugins/check_by_ssh.c b/plugins/check_by_ssh.c
index b1688d0e830a699ebfae6cb4db7081870bab879a..ff27b396c9dced56da8d2058f47811205e6ad126 100644 (file)
--- a/plugins/check_by_ssh.c
+++ b/plugins/check_by_ssh.c
-/******************************************************************************
-
- The Nagios Plugins are free software; you can redistribute them
- and/or modify them under the terms of the GNU General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id$
-
- *****************************************************************************/
-
+/*****************************************************************************
+*
+* Nagios check_by_ssh plugin
+*
+* License: GPL
+* Copyright (c) 2000-2008 Nagios Plugins Development Team
+*
+* Description:
+*
+* This file contains the check_by_ssh plugin
+*
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program. If not, see <http://www.gnu.org/licenses/>.
+*
+*
+*****************************************************************************/
+
const char *progname = "check_by_ssh";
-const char *revision = "$Revision$";
-const char *copyright = "2000-2006";
+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);
-int commands = 0;
-int services = 0;
-int skip = 0;
+unsigned int commands = 0;
+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;
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);
textdomain (PACKAGE);
+ /* Parse extra opts if any */
+ argv=np_extra_opts (&argc, argv, progname);
+
/* process arguments */
if (process_arguments (argc, argv) == ERROR)
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);
-
- result = np_runcmd(comm, &chld_out, &chld_err, 0);
- /* UNKNOWN if output found on stderr */
- if(chld_err.buflen) {
- printf(_("Remote command execution failed: %s\n"),
- chld_err.buflen ? chld_err.buf : _("Unknown error"));
- return STATE_UNKNOWN;
+ if (verbose) {
+ printf ("Command: %s\n", commargv[0]);
+ for (i=1; i<commargc; i++)
+ printf ("Argument %i: %s\n", i, commargv[i]);
+ }
+
+ result = cmd_run_array (commargv, &chld_out, &chld_err, 0);
+
+ if (skip_stdout == -1) /* --skip-stdout specified without argument */
+ skip_stdout = chld_out.lines;
+ if (skip_stderr == -1) /* --skip-stderr specified without argument */
+ skip_stderr = chld_err.lines;
+
+ /* UNKNOWN or worse if (non-skipped) output found on stderr */
+ 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);
}
/* this is simple if we're not supposed to be passive.
* Wrap up quickly and keep the tricks below */
if(!passive) {
- printf ("%s\n", skip < chld_out.lines ? chld_out.line[skip] : chld_out.buf);
+ if (chld_out.lines > skip_stdout)
+ for (i = skip_stdout; i < chld_out.lines; i++)
+ puts (chld_out.line[i]);
+ else
+ printf (_("%s - check_by_ssh: Remote command '%s' returned status %d\n"),
+ state_text(result), remotecmd, result);
return result; /* return error status from remote command */
}
local_time = time (NULL);
commands = 0;
- for(i = skip; chld_out.line[i]; i++) {
- status_text = strstr (chld_out.line[i], "STATUS CODE: ");
- if (status_text == NULL) {
- printf ("%s", chld_out.line[i]);
- return result;
- }
+ for(i = skip_stdout; i < chld_out.lines; i++) {
+ status_text = chld_out.line[i++];
+ if (i == chld_out.lines || strstr (chld_out.line[i], "STATUS CODE: ") == NULL)
+ die (STATE_UNKNOWN, _("%s: Error parsing output\n"), progname);
+
if (service[commands] && status_text
- && sscanf (status_text, "STATUS CODE: %d", &cresult) == 1)
+ && sscanf (chld_out.line[i], "STATUS CODE: %d", &cresult) == 1)
{
fprintf (fp, "[%d] PROCESS_SERVICE_CHECK_RESULT;%s;%s;%d;%s\n",
(int) local_time, host_shortname, service[commands++],
- cresult, chld_out.line[i]);
+ cresult, status_text);
}
}
- /* force an OK state */
+ /* Multiple commands and passive checking should always return OK */
return result;
}
{"user", required_argument, 0, 'u'},
{"logname", required_argument, 0, 'l'},
{"command", required_argument, 0, 'C'},
- {"skip", required_argument, 0, 'S'},
+ {"skip", optional_argument, 0, 'S'}, /* backwards compatibility */
+ {"skip-stdout", optional_argument, 0, 'S'},
+ {"skip-stderr", optional_argument, 0, 'E'},
{"proto1", no_argument, 0, '1'},
{"proto2", no_argument, 0, '2'},
{"use-ipv4", no_argument, 0, '4'},
{"use-ipv6", no_argument, 0, '6'},
+ {"ssh-option", required_argument, 0, 'o'},
+ {"quiet", no_argument, 0, 'q'},
{0, 0, 0, 0}
};
strcpy (argv[c], "-t");
while (1) {
- c = getopt_long (argc, argv, "Vvh1246ft:H:O:p:i:u:l:C:S:n:s:", longopts,
+ c = getopt_long (argc, argv, "Vvh1246fqt:H:O:p:i:u:l:C:S::E::n:s:o:", longopts,
&option);
if (c == -1 || c == EOF)
switch (c) {
case 'V': /* version */
- print_revision (progname, revision);
+ print_revision (progname, NP_VERSION);
exit (STATE_OK);
case 'h': /* help */
print_help ();
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;
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++;
asprintf (&remotecmd, "%s;echo STATUS CODE: $?;", remotecmd);
asprintf (&remotecmd, "%s%s", remotecmd, optarg);
break;
- case 'S': /* Skip n lines in the output to ignore system banner */
- if (!is_integer (optarg))
- usage_va(_("skip lines must be an integer"));
+ case 'S': /* skip n (or all) lines on stdout */
+ if (optarg == NULL)
+ skip_stdout = -1; /* skip all output on stdout */
+ else if (!is_integer (optarg))
+ usage_va(_("skip-stdout argument must be an integer"));
+ else
+ skip_stdout = atoi (optarg);
+ break;
+ case 'E': /* skip n (or all) lines on stderr */
+ if (optarg == NULL)
+ skip_stderr = -1; /* skip all output on stderr */
+ else if (!is_integer (optarg))
+ usage_va(_("skip-stderr argument must be an integer"));
else
- skip = atoi (optarg);
+ skip_stderr = atoi (optarg);
+ break;
+ case 'o': /* Extra options for the ssh command */
+ comm_append("-o");
+ comm_append(optarg);
+ break;
+ case 'q': /* Tell the ssh command to be quiet */
+ comm_append("-q");
break;
default: /* help */
- usage_va(_("Unknown argument - %s"), optarg);
+ usage5();
}
}
asprintf (&remotecmd, "%s", argv[c]);
}
- if (commands > 1)
+ if (commands > 1 || passive)
asprintf (&remotecmd, "%s;echo STATUS CODE: $?;", remotecmd);
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)
void
print_help (void)
{
- print_revision (progname, revision);
+ print_revision (progname, NP_VERSION);
printf ("Copyright (c) 1999 Karl DeBisschop <kdebisschop@users.sourceforge.net>\n");
printf (COPYRIGHT, copyright, email);
printf (_("This plugin uses SSH to execute commands on a remote host"));
printf ("\n\n");
-
+
print_usage ();
- printf (_(UT_HELP_VRSN));
+ printf (UT_HELP_VRSN);
- printf (_(UT_HOST_PORT), 'p', "none");
+ printf (UT_EXTRA_OPTS);
- printf (_(UT_IPv46));
+ printf (UT_HOST_PORT, 'p', "none");
+
+ printf (UT_IPv46);
printf (" %s\n", "-1, --proto1");
- printf (" %s\n", _("tell ssh to use Protocol 1"));
+ printf (" %s\n", _("tell ssh to use Protocol 1 [optional]"));
printf (" %s\n", "-2, --proto2");
- printf (" %s\n", _("tell ssh to use Protocol 2"));
- printf (" %s\n", "-S, --skiplines=n");
- printf (" %s\n", _("Ignore first n lines on STDERR (to suppress a logon banner)"));
+ printf (" %s\n", _("tell ssh to use Protocol 2 [optional]"));
+ printf (" %s\n", "-S, --skip-stdout[=n]");
+ 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", "-f");
- printf (" %s\n", _("tells ssh to fork rather than create a tty"));
+ 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'");
printf (" %s\n", _("command to execute on the remote machine"));
printf (" %s\n","-l, --logname=USERNAME");
printf (" %s\n", _("list of nagios service names, separated by ':' [optional]"));
printf (" %s\n","-n, --name=NAME");
printf (" %s\n", _("short name of host in nagios configuration [optional]"));
- printf (_(UT_WARN_CRIT));
- printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
+ printf (" %s\n","-o, --ssh-option=OPTION");
+ printf (" %s\n", _("Call ssh with '-o OPTION' (may be used multiple times) [optional]"));
+ printf (" %s\n","-q, --quiet");
+ printf (" %s\n", _("Tell ssh to suppress warning and diagnostic messages [optional]"));
+ printf (UT_WARN_CRIT);
+ printf (UT_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
+ printf (UT_VERBOSE);
+ printf("\n");
printf (" %s\n", _("The most common mode of use is to refer to a local identity file with"));
printf (" %s\n", _("the '-i' option. In this mode, the identity pair should have a null"));
printf (" %s\n", _("passphrase and the public key should be listed in the authorized_keys"));
printf (" %s\n", _("only one command on the remote server. If the remote SSH server tracks"));
printf (" %s\n", _("invocation arguments, the one remote program may be an agent that can"));
printf (" %s\n", _("execute additional commands as proxy"));
+ printf("\n");
printf (" %s\n", _("To use passive mode, provide multiple '-C' options, and provide"));
printf (" %s\n", _("all of -O, -s, and -n options (servicelist order must match '-C'options)"));
printf ("\n");
printf (" %s\n", "[1080933700] PROCESS_SERVICE_CHECK_RESULT;flint;c1;0; up 2 days");
printf (" %s\n", "[1080933700] PROCESS_SERVICE_CHECK_RESULT;flint;c2;0; up 2 days");
printf (" %s\n", "[1080933700] PROCESS_SERVICE_CHECK_RESULT;flint;c3;0; up 2 days");
- printf (_(UT_SUPPORT));
+
+ printf(UT_SUPPORT);
}
void
print_usage (void)
{
- printf (_("Usage:"));
- printf(" %s [-f46] [-t timeout] [-i identity] [-l user] -H <host> -C <command>",progname);
- printf(" [-n name] [-s servicelist] [-O outputfile] [-p port]\n");
+ 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"
+ " [-l user] [-n name] [-s servicelist] [-O outputfile]\n"
+ " [-p port] [-o ssh-option]\n",
+ progname);
}