X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=plugins%2Fcheck_by_ssh.c;h=7306e743da5cb162a9179713b6f6c6eff64eafc5;hb=e8d6f41fadd81840aba3d408fe7778ccfd31ad95;hp=f569731de9acb5e3b7896b3ec2f5c449744e91b0;hpb=234481163fc3caf0cb8b14f601f0f9f1458f97f5;p=nagiosplug.git diff --git a/plugins/check_by_ssh.c b/plugins/check_by_ssh.c index f569731..7306e74 100644 --- a/plugins/check_by_ssh.c +++ b/plugins/check_by_ssh.c @@ -1,41 +1,55 @@ /****************************************************************************** - - 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) 1999-2006 nagios-plugins team +* +* Last Modified: $Date$ +* +* Description: +* +* This file contains the check_by_ssh plugin +* +* License Information: +* +* 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 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. +* +* $Id$ +* +******************************************************************************/ const char *progname = "check_by_ssh"; const char *revision = "$Revision$"; -const char *copyright = "2000-2003"; +const char *copyright = "2000-2006"; const char *email = "nagiosplug-devel@lists.sourceforge.net"; #include "common.h" #include "netutils.h" #include "utils.h" -#include "popen.h" +#include "runcmd.h" int process_arguments (int, char **); int validate_arguments (void); void print_help (void); void print_usage (void); -int commands = 0; -int services = 0; -int skip_lines = 0; +unsigned int commands = 0; +unsigned int services = 0; +int skip_stdout = 0; +int skip_stderr = 0; char *remotecmd = NULL; char *comm = NULL; char *hostname = NULL; @@ -49,120 +63,90 @@ int main (int argc, char **argv) { - char input_buffer[MAX_INPUT_BUFFER]; - char *result_text; char *status_text; - char *output; - char *eol = NULL; int cresult; int result = STATE_UNKNOWN; + int i; time_t local_time; FILE *fp = NULL; + struct output chld_out, chld_err; - remotecmd = strdup (""); + remotecmd = ""; comm = strdup (SSH_COMMAND); - result_text = strdup (""); setlocale (LC_ALL, ""); bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); /* process arguments */ - if (process_arguments (argc, argv) != TRUE) - usage4 (_("Could not parse 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) { - usage4 (_(" Cannot catch SIGALRM")); + usage_va(_("Cannot catch SIGALRM")); } alarm (timeout_interval); /* run the command */ - if (verbose) printf ("%s\n", comm); - child_process = spopen (comm); + result = np_runcmd(comm, &chld_out, &chld_err, 0); - if (child_process == NULL) { - printf (_("Could not open pipe: %s\n"), comm); - return STATE_UNKNOWN; - } + 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; - - /* open STDERR for spopen */ - child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r"); - if (child_stderr == NULL) { - printf (_("Could not open stderr for %s\n"), SSH_COMMAND); + /* UNKNOWN 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 STATE_UNKNOWN; } - - /* build up results from remote command in result_text */ - while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) - asprintf (&result_text, "%s%s", result_text, input_buffer); - - /* WARNING if output found on stderr */ - while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr)) { - if (skip_lines > 0) { - if (input_buffer[strlen(input_buffer)-1] == '\n') { - skip_lines--; - } - } else { - printf ("%s", input_buffer); - result = STATE_WARNING; - } + /* this is simple if we're not supposed to be passive. + * Wrap up quickly and keep the tricks below */ + if(!passive) { + 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 */ } - (void) fclose (child_stderr); - if (result == STATE_WARNING) - return result; - - /* close the pipe */ - result = spclose (child_process); + /* + * Passive mode + */ /* process output */ - if (passive) { + if (!(fp = fopen (outputfile, "a"))) { + printf (_("SSH WARNING: could not open %s\n"), outputfile); + exit (STATE_UNKNOWN); + } - if (!(fp = fopen (outputfile, "a"))) { - printf (_("SSH WARNING: could not open %s\n"), outputfile); - exit (STATE_UNKNOWN); + local_time = time (NULL); + commands = 0; + for(i = skip_stdout; i < chld_out.lines; i++) { + status_text = strstr (chld_out.line[i], "STATUS CODE: "); + if (status_text == NULL) { + printf ("%s", chld_out.line[i]); + return result; } - - local_time = time (NULL); - commands = 0; - while (result_text && strlen(result_text) > 0) { - status_text = strstr (result_text, "STATUS CODE: "); - if (status_text == NULL) { - printf ("%s", result_text); - return result; - } - asprintf (&output, "%s", result_text); - result_text = strnl (status_text); - eol = strpbrk (output, "\r\n"); - if (eol != NULL) - eol[0] = 0; - if (service[commands] && status_text - && sscanf (status_text, "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, - output); - } + if (service[commands] && status_text + && sscanf (status_text, "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]); } - } - - - /* print the first line from the remote command */ - else { - eol = strpbrk (result_text, "\r\n"); - if (eol) - eol[0] = 0; - printf ("%s\n", result_text); - } - - - /* return error status from remote command */ + + /* force an OK state */ return result; } @@ -189,11 +173,15 @@ process_arguments (int argc, char **argv) {"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} }; @@ -205,17 +193,13 @@ process_arguments (int argc, char **argv) strcpy (argv[c], "-t"); while (1) { - c = getopt_long (argc, argv, "Vvh1246ft:H:O:p:i:u:l:C:S:n:s:", longopts, - &option); + 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) break; switch (c) { - case '?': /* help */ - printf (_("%s: Unknown argument: %s\n\n"), progname, optarg); - print_usage (); - exit (STATE_UNKNOWN); case 'V': /* version */ print_revision (progname, revision); exit (STATE_OK); @@ -227,18 +211,17 @@ process_arguments (int argc, char **argv) break; case 't': /* timeout period */ if (!is_integer (optarg)) - usage2 (_("Timeout interval must be a positive integer"), optarg); + usage_va(_("Timeout interval must be a positive integer")); else timeout_interval = atoi (optarg); break; case 'H': /* host */ - if (!is_host (optarg)) - usage2 (_("Invalid hostname/address"), optarg); + host_or_die(optarg); hostname = optarg; break; case 'p': /* port number */ if (!is_integer (optarg)) - usage2 (_("Port must be a positive integer"), optarg); + usage_va(_("Port must be a positive integer")); asprintf (&comm,"%s -p %s", comm, optarg); break; case 'O': /* output file */ @@ -246,25 +229,27 @@ process_arguments (int argc, char **argv) passive = TRUE; break; case 's': /* description of service to check */ - service = realloc (service, (++services) * sizeof(char *)); p1 = optarg; + service = realloc (service, (++services) * sizeof(char *)); while ((p2 = index (p1, ':'))) { *p2 = '\0'; - asprintf (&service[services-1], "%s", p1); + service[services - 1] = p1; service = realloc (service, (++services) * sizeof(char *)); p1 = p2 + 1; } - asprintf (&service[services-1], "%s", p1); + service[services - 1] = p1; break; case 'n': /* short name of host in nagios configuration */ host_shortname = optarg; break; + case 'u': c = 'l'; case 'l': /* login name */ case 'i': /* identity */ asprintf (&comm, "%s -%c %s", comm, c, optarg); break; + case '1': /* Pass these switches directly to ssh */ case '2': /* 1 to force version 1, 2 to force version 2 */ case '4': /* -4 for IPv4 */ @@ -278,12 +263,30 @@ process_arguments (int argc, char **argv) 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)) - usage2 (_("skip lines must be an integer"), optarg); + 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_lines = atoi (optarg); + 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_stderr = atoi (optarg); + break; + case 'o': /* Extra options for the ssh command */ + asprintf (&comm, "%s -%c '%s'", comm, c, optarg); + break; + case 'q': /* Tell the ssh command to be quiet */ + asprintf (&comm, "%s -%c", comm, c); + break; + default: /* help */ + usage5(); } } @@ -291,8 +294,8 @@ process_arguments (int argc, char **argv) if (hostname == NULL) { if (c <= argc) { die (STATE_UNKNOWN, _("%s: You must provide a host name\n"), progname); - } else if (!is_host (argv[c])) - die (STATE_UNKNOWN, "%s: %s %s\n", progname, _("Invalid hostname/address"), argv[c]); + } + host_or_die(argv[c]); hostname = argv[c++]; } @@ -308,7 +311,7 @@ process_arguments (int argc, char **argv) asprintf (&remotecmd, "%s;echo STATUS CODE: $?;", remotecmd); if (remotecmd == NULL || strlen (remotecmd) <= 1) - usage (_("No remotecmd\n")); + usage_va(_("No remotecmd")); asprintf (&comm, "%s %s '%s'", comm, hostname, remotecmd); @@ -338,11 +341,13 @@ print_help (void) { print_revision (progname, revision); - printf (_("Copyright (c) 1999 Karl DeBisschop \n")); - printf (_(COPYRIGHT), copyright, email); + printf ("Copyright (c) 1999 Karl DeBisschop \n"); + printf (COPYRIGHT, copyright, email); - printf (_("This plugin uses SSH to execute commands on a remote host\n\n")); + printf (_("This plugin uses SSH to execute commands on a remote host")); + printf ("\n\n"); + print_usage (); printf (_(UT_HELP_VRSN)); @@ -351,56 +356,51 @@ print_help (void) printf (_(UT_IPv46)); - printf (_("\ - -1, --proto1\n\ - tell ssh to use Protocol 1\n\ - -2, --proto2\n\ - tell ssh to use Protocol 2\n\ - -S, --skiplines=n\n\ - Ignore first n lines on STDERR (to suppress a logon banner)\n\ - -f\n\ - tells ssh to fork rather than create a tty\n")); - - printf (_("\ - -C, --command='COMMAND STRING'\n\ - command to execute on the remote machine\n\ - -l, --logname=USERNAME\n\ - SSH user name on remote host [optional]\n\ - -i, --identity=KEYFILE\n\ - identity of an authorized key [optional]\n\ - -O, --output=FILE\n\ - external command file for nagios [optional]\n\ - -s, --services=LIST\n\ - list of nagios service names, separated by ':' [optional]\n\ - -n, --name=NAME\n\ - short name of host in nagios configuration [optional]\n")); - + printf (" %s\n", "-1, --proto1"); + printf (" %s\n", _("tell ssh to use Protocol 1 [optional]")); + printf (" %s\n", "-2, --proto2"); + 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 [optional]")); + 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", _("SSH user name on remote host [optional]")); + printf (" %s\n","-i, --identity=KEYFILE"); + printf (" %s\n", _("identity of an authorized key [optional]")); + printf (" %s\n","-O, --output=FILE"); + printf (" %s\n", _("external command file for nagios [optional]")); + printf (" %s\n","-s, --services=LIST"); + 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 (" %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 (_("\n\ -The most common mode of use is to refer to a local identity file with\n\ -the '-i' option. In this mode, the identity pair should have a null\n\ -passphrase and the public key should be listed in the authorized_keys\n\ -file of the remote host. Usually the key will be restricted to running\n\ -only one command on the remote server. If the remote SSH server tracks\n\ -invocation agruments, the one remote program may be an agent that can\n\ -execute additional commands as proxy\n")); - - printf (_("\n\ -To use passive mode, provide multiple '-C' options, and provide\n\ -all of -O, -s, and -n options (servicelist order must match '-C'\n\ -options)\n")); - - printf (_("\n\ -$ check_by_ssh -H localhost -n lh -s c1:c2:c3 \\\n\ - -C uptime -C uptime -C uptime -O /tmp/foo\n\ -$ cat /tmp/foo\n\ -[1080933700] PROCESS_SERVICE_CHECK_RESULT;flint;c1;0; up 2 days...\n\ -[1080933700] PROCESS_SERVICE_CHECK_RESULT;flint;c2;0; up 2 days...\n\ -[1080933700] PROCESS_SERVICE_CHECK_RESULT;flint;c3;0; up 2 days...\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", _("file of the remote host. Usually the key will be restricted to running")); + 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 (" %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", _("Examples:")); + printf (" %s\n", "$ check_by_ssh -H localhost -n lh -s c1:c2:c3 -C uptime -C uptime -C uptime -O /tmp/foo"); + printf (" %s\n", "$ cat /tmp/foo"); + 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_VERBOSE)); printf (_(UT_SUPPORT)); } @@ -409,9 +409,10 @@ $ cat /tmp/foo\n\ void print_usage (void) { - printf (_("\n\ -Usage: %s [-f46] [-t timeout] [-i identity] [-l user] -H \n\ - -C [-n name] [-s servicelist] [-O outputfile] [-p port]\n"), + printf (_("Usage:")); + printf (" %s -H -C [-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); - printf (_(UT_HLP_VRS), progname, progname); }