mirror of
https://github.com/monitoring-plugins/monitoring-plugins.git
synced 2026-06-09 08:42:17 -04:00
Refactor check_by_ssh
This commit is contained in:
Lorenz Kästle
parent
e8d580eb4b
commit
bd3ec036c7
4 changed files with 197 additions and 128 deletions
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@ -54,7 +54,8 @@ EXTRA_DIST = t \
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check_dbi.d \
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check_ssh.d \
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check_dns.d \
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check_apt.d
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check_apt.d \
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check_by_ssh.d
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PLUGINHDRS = common.h
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@ -33,7 +33,6 @@ check_apt_config check_apt_config_init() {
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.list = false,
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.packages_warning = 1,
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.update_opts = NULL,
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.update_opts = NULL,
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.do_include = NULL,
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.do_exclude = NULL,
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.do_critical = NULL,
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@ -32,48 +32,28 @@ const char *email = "devel@monitoring-plugins.org";
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#include "common.h"
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#include "utils.h"
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#include "netutils.h"
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#include "utils_cmd.h"
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#include "check_by_ssh.d/config.h"
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#include "states.h"
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#ifndef NP_MAXARGS
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# define NP_MAXARGS 1024
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#endif
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static int process_arguments(int /*argc*/, char ** /*argv*/);
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static int validate_arguments(void);
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static void comm_append(const char * /*str*/);
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typedef struct {
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int errorcode;
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check_by_ssh_config config;
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} check_by_ssh_config_wrapper;
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static check_by_ssh_config_wrapper process_arguments(int /*argc*/, char ** /*argv*/);
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static check_by_ssh_config_wrapper validate_arguments(check_by_ssh_config_wrapper /*config_wrapper*/);
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static command_construct comm_append(command_construct /*cmd*/, const char * /*str*/);
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static void print_help(void);
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void print_usage(void);
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static unsigned int commands = 0;
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static unsigned int services = 0;
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static int skip_stdout = 0;
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static int skip_stderr = 0;
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static int warn_on_stderr = 0;
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static bool unknown_timeout = false;
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static char *remotecmd = NULL;
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static char **commargv = NULL;
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static int commargc = 0;
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static char *hostname = NULL;
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static char *outputfile = NULL;
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static char *host_shortname = NULL;
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static char **service;
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static bool passive = false;
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static bool verbose = false;
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int main(int argc, char **argv) {
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char *status_text;
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int cresult;
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int result = STATE_UNKNOWN;
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time_t local_time;
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FILE *file_pointer = NULL;
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output chld_out;
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output chld_err;
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remotecmd = "";
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comm_append(SSH_COMMAND);
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setlocale(LC_ALL, "");
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bindtextdomain(PACKAGE, LOCALEDIR);
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textdomain(PACKAGE);
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@ -81,11 +61,15 @@ int main(int argc, char **argv) {
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/* Parse extra opts if any */
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argv = np_extra_opts(&argc, argv, progname);
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check_by_ssh_config_wrapper tmp_config = process_arguments(argc, argv);
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/* process arguments */
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if (process_arguments(argc, argv) == ERROR) {
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if (tmp_config.errorcode == ERROR) {
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usage_va(_("Could not parse arguments"));
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}
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const check_by_ssh_config config = tmp_config.config;
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/* Set signal handling and alarm timeout */
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if (signal(SIGALRM, timeout_alarm_handler) == SIG_ERR) {
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usage_va(_("Cannot catch SIGALRM"));
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@ -94,16 +78,18 @@ int main(int argc, char **argv) {
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/* run the command */
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if (verbose) {
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printf("Command: %s\n", commargv[0]);
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for (int i = 1; i < commargc; i++) {
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printf("Argument %i: %s\n", i, commargv[i]);
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printf("Command: %s\n", config.cmd.commargv[0]);
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for (int i = 1; i < config.cmd.commargc; i++) {
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printf("Argument %i: %s\n", i, config.cmd.commargv[i]);
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}
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}
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result = cmd_run_array(commargv, &chld_out, &chld_err, 0);
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output chld_out;
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output chld_err;
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mp_state_enum result = cmd_run_array(config.cmd.commargv, &chld_out, &chld_err, 0);
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/* SSH returns 255 if connection attempt fails; include the first line of error output */
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if (result == 255 && unknown_timeout) {
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if (result == 255 && config.unknown_timeout) {
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printf(_("SSH connection failed: %s\n"), chld_err.lines > 0 ? chld_err.line[0] : "(no error output)");
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return STATE_UNKNOWN;
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}
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@ -117,17 +103,24 @@ int main(int argc, char **argv) {
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}
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}
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if (skip_stdout == -1) { /* --skip-stdout specified without argument */
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size_t skip_stdout = 0;
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if (config.skip_stdout == -1) { /* --skip-stdout specified without argument */
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skip_stdout = chld_out.lines;
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} else {
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skip_stdout = config.skip_stdout;
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}
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if (skip_stderr == -1) { /* --skip-stderr specified without argument */
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size_t skip_stderr = 0;
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if (config.skip_stderr == -1) { /* --skip-stderr specified without argument */
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skip_stderr = chld_err.lines;
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} else {
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skip_stderr = config.skip_stderr;
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}
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/* UNKNOWN or worse if (non-skipped) output found on stderr */
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if (chld_err.lines > (size_t)skip_stderr) {
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printf(_("Remote command execution failed: %s\n"), chld_err.line[skip_stderr]);
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if (warn_on_stderr) {
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if (config.warn_on_stderr) {
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return max_state_alt(result, STATE_WARNING);
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}
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return max_state_alt(result, STATE_UNKNOWN);
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@ -135,13 +128,13 @@ int main(int argc, char **argv) {
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/* this is simple if we're not supposed to be passive.
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* Wrap up quickly and keep the tricks below */
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if (!passive) {
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if (!config.passive) {
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if (chld_out.lines > (size_t)skip_stdout) {
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for (size_t i = skip_stdout; i < chld_out.lines; i++) {
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puts(chld_out.line[i]);
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}
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} else {
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printf(_("%s - check_by_ssh: Remote command '%s' returned status %d\n"), state_text(result), remotecmd, result);
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printf(_("%s - check_by_ssh: Remote command '%s' returned status %d\n"), state_text(result), config.remotecmd, result);
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}
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return result; /* return error status from remote command */
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}
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@ -151,36 +144,34 @@ int main(int argc, char **argv) {
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*/
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/* process output */
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if (!(file_pointer = fopen(outputfile, "a"))) {
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printf(_("SSH WARNING: could not open %s\n"), outputfile);
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FILE *file_pointer = NULL;
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if (!(file_pointer = fopen(config.outputfile, "a"))) {
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printf(_("SSH WARNING: could not open %s\n"), config.outputfile);
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exit(STATE_UNKNOWN);
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}
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local_time = time(NULL);
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commands = 0;
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time_t local_time = time(NULL);
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unsigned int commands = 0;
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char *status_text;
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int cresult;
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for (size_t i = skip_stdout; i < chld_out.lines; i++) {
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status_text = chld_out.line[i++];
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if (i == chld_out.lines || strstr(chld_out.line[i], "STATUS CODE: ") == NULL) {
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die(STATE_UNKNOWN, _("%s: Error parsing output\n"), progname);
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}
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if (service[commands] && status_text && sscanf(chld_out.line[i], "STATUS CODE: %d", &cresult) == 1) {
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fprintf(file_pointer, "[%d] PROCESS_SERVICE_CHECK_RESULT;%s;%s;%d;%s\n", (int)local_time, host_shortname, service[commands++],
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cresult, status_text);
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if (config.service[commands] && status_text && sscanf(chld_out.line[i], "STATUS CODE: %d", &cresult) == 1) {
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fprintf(file_pointer, "[%d] PROCESS_SERVICE_CHECK_RESULT;%s;%s;%d;%s\n", (int)local_time, config.host_shortname,
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config.service[commands++], cresult, status_text);
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}
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}
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/* Multiple commands and passive checking should always return OK */
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return result;
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exit(result);
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}
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/* process command-line arguments */
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int process_arguments(int argc, char **argv) {
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int c;
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char *p1;
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char *p2;
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int option = 0;
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check_by_ssh_config_wrapper process_arguments(int argc, char **argv) {
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static struct option longopts[] = {{"version", no_argument, 0, 'V'},
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{"help", no_argument, 0, 'h'},
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{"verbose", no_argument, 0, 'v'},
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@ -210,24 +201,33 @@ int process_arguments(int argc, char **argv) {
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{"configfile", optional_argument, 0, 'F'},
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{0, 0, 0, 0}};
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check_by_ssh_config_wrapper result = {
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.errorcode = OK,
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.config = check_by_ssh_config_init(),
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};
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if (argc < 2) {
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return ERROR;
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result.errorcode = ERROR;
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return result;
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}
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for (c = 1; c < argc; c++) {
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if (strcmp("-to", argv[c]) == 0) {
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strcpy(argv[c], "-t");
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for (int index = 1; index < argc; index++) {
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if (strcmp("-to", argv[index]) == 0) {
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strcpy(argv[index], "-t");
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}
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}
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while (1) {
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c = getopt_long(argc, argv, "Vvh1246fqt:UH:O:p:i:u:l:C:S::E::n:s:o:F:", longopts, &option);
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result.config.cmd = comm_append(result.config.cmd, SSH_COMMAND);
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if (c == -1 || c == EOF) {
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int option = 0;
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while (true) {
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int opt_index = getopt_long(argc, argv, "Vvh1246fqt:UH:O:p:i:u:l:C:S::E::n:s:o:F:", longopts, &option);
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if (opt_index == -1 || opt_index == EOF) {
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break;
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}
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switch (c) {
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switch (opt_index) {
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case 'V': /* version */
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print_revision(progname, NP_VERSION);
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exit(STATE_UNKNOWN);
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@ -245,169 +245,182 @@ int process_arguments(int argc, char **argv) {
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}
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break;
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case 'U':
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unknown_timeout = true;
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result.config.unknown_timeout = true;
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break;
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case 'H': /* host */
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hostname = optarg;
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result.config.hostname = optarg;
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break;
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case 'p': /* port number */
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if (!is_integer(optarg)) {
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usage_va(_("Port must be a positive integer"));
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}
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comm_append("-p");
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comm_append(optarg);
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result.config.cmd = comm_append(result.config.cmd, "-p");
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result.config.cmd = comm_append(result.config.cmd, optarg);
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break;
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case 'O': /* output file */
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outputfile = optarg;
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passive = true;
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result.config.outputfile = optarg;
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result.config.passive = true;
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break;
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case 's': /* description of service to check */
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case 's': /* description of service to check */ {
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char *p1;
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char *p2;
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p1 = optarg;
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service = realloc(service, (++services) * sizeof(char *));
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result.config.service = realloc(result.config.service, (++result.config.number_of_services) * sizeof(char *));
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while ((p2 = index(p1, ':'))) {
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*p2 = '\0';
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service[services - 1] = p1;
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service = realloc(service, (++services) * sizeof(char *));
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result.config.service[result.config.number_of_services - 1] = p1;
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result.config.service = realloc(result.config.service, (++result.config.number_of_services) * sizeof(char *));
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p1 = p2 + 1;
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}
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service[services - 1] = p1;
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result.config.service[result.config.number_of_services - 1] = p1;
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break;
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case 'n': /* short name of host in the monitoring configuration */
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host_shortname = optarg;
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break;
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result.config.host_shortname = optarg;
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} break;
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case 'u':
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comm_append("-l");
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comm_append(optarg);
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result.config.cmd = comm_append(result.config.cmd, "-l");
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result.config.cmd = comm_append(result.config.cmd, optarg);
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break;
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case 'l': /* login name */
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comm_append("-l");
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comm_append(optarg);
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result.config.cmd = comm_append(result.config.cmd, "-l");
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result.config.cmd = comm_append(result.config.cmd, optarg);
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break;
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case 'i': /* identity */
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comm_append("-i");
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comm_append(optarg);
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result.config.cmd = comm_append(result.config.cmd, "-i");
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result.config.cmd = comm_append(result.config.cmd, optarg);
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break;
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case '1': /* Pass these switches directly to ssh */
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comm_append("-1");
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result.config.cmd = comm_append(result.config.cmd, "-1");
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break;
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case '2': /* 1 to force version 1, 2 to force version 2 */
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comm_append("-2");
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result.config.cmd = comm_append(result.config.cmd, "-2");
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break;
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case '4': /* -4 for IPv4 */
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comm_append("-4");
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result.config.cmd = comm_append(result.config.cmd, "-4");
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break;
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case '6': /* -6 for IPv6 */
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comm_append("-6");
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result.config.cmd = comm_append(result.config.cmd, "-6");
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break;
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case 'f': /* fork to background */
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comm_append("-f");
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result.config.cmd = comm_append(result.config.cmd, "-f");
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break;
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case 'C': /* Command for remote machine */
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commands++;
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if (commands > 1) {
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xasprintf(&remotecmd, "%s;echo STATUS CODE: $?;", remotecmd);
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result.config.commands++;
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if (result.config.commands > 1) {
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xasprintf(&result.config.remotecmd, "%s;echo STATUS CODE: $?;", result.config.remotecmd);
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}
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xasprintf(&remotecmd, "%s%s", remotecmd, optarg);
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xasprintf(&result.config.remotecmd, "%s%s", result.config.remotecmd, optarg);
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break;
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case 'S': /* skip n (or all) lines on stdout */
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if (optarg == NULL) {
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skip_stdout = -1; /* skip all output on stdout */
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result.config.skip_stdout = -1; /* skip all output on stdout */
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} else if (!is_integer(optarg)) {
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usage_va(_("skip-stdout argument must be an integer"));
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} else {
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skip_stdout = atoi(optarg);
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result.config.skip_stdout = atoi(optarg);
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}
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break;
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case 'E': /* skip n (or all) lines on stderr */
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if (optarg == NULL) {
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skip_stderr = -1; /* skip all output on stderr */
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result.config.skip_stderr = -1; /* skip all output on stderr */
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} else if (!is_integer(optarg)) {
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usage_va(_("skip-stderr argument must be an integer"));
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} else {
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skip_stderr = atoi(optarg);
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result.config.skip_stderr = atoi(optarg);
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}
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break;
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case 'W': /* exit with warning if there is an output on stderr */
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warn_on_stderr = 1;
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result.config.warn_on_stderr = true;
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break;
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case 'o': /* Extra options for the ssh command */
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comm_append("-o");
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comm_append(optarg);
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result.config.cmd = comm_append(result.config.cmd, "-o");
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result.config.cmd = comm_append(result.config.cmd, optarg);
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break;
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case 'q': /* Tell the ssh command to be quiet */
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comm_append("-q");
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result.config.cmd = comm_append(result.config.cmd, "-q");
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break;
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case 'F': /* ssh configfile */
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comm_append("-F");
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comm_append(optarg);
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result.config.cmd = comm_append(result.config.cmd, "-F");
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result.config.cmd = comm_append(result.config.cmd, optarg);
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break;
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default: /* help */
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usage5();
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}
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}
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c = optind;
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if (hostname == NULL) {
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int c = optind;
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if (result.config.hostname == NULL) {
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if (c <= argc) {
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die(STATE_UNKNOWN, _("%s: You must provide a host name\n"), progname);
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}
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hostname = argv[c++];
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result.config.hostname = argv[c++];
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}
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if (strlen(remotecmd) == 0) {
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if (strlen(result.config.remotecmd) == 0) {
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for (; c < argc; c++) {
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if (strlen(remotecmd) > 0) {
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xasprintf(&remotecmd, "%s %s", remotecmd, argv[c]);
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if (strlen(result.config.remotecmd) > 0) {
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xasprintf(&result.config.remotecmd, "%s %s", result.config.remotecmd, argv[c]);
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} else {
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xasprintf(&remotecmd, "%s", argv[c]);
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xasprintf(&result.config.remotecmd, "%s", argv[c]);
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}
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}
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}
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if (commands > 1 || passive) {
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xasprintf(&remotecmd, "%s;echo STATUS CODE: $?;", remotecmd);
|
||||
if (result.config.commands > 1 || result.config.passive) {
|
||||
xasprintf(&result.config.remotecmd, "%s;echo STATUS CODE: $?;", result.config.remotecmd);
|
||||
}
|
||||
|
||||
if (remotecmd == NULL || strlen(remotecmd) <= 1) {
|
||||
if (result.config.remotecmd == NULL || strlen(result.config.remotecmd) <= 1) {
|
||||
usage_va(_("No remotecmd"));
|
||||
}
|
||||
|
||||
comm_append(hostname);
|
||||
comm_append(remotecmd);
|
||||
result.config.cmd = comm_append(result.config.cmd, result.config.hostname);
|
||||
result.config.cmd = comm_append(result.config.cmd, result.config.remotecmd);
|
||||
|
||||
return validate_arguments();
|
||||
return validate_arguments(result);
|
||||
}
|
||||
|
||||
void comm_append(const char *str) {
|
||||
command_construct comm_append(command_construct cmd, const char *str) {
|
||||
|
||||
if (++commargc > NP_MAXARGS) {
|
||||
if (verbose) {
|
||||
for (int i = 0; i < cmd.commargc; i++) {
|
||||
printf("Current command: [%i] %s\n", i, cmd.commargv[i]);
|
||||
}
|
||||
|
||||
printf("Appending: %s\n", str);
|
||||
}
|
||||
|
||||
if (++cmd.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) {
|
||||
if ((cmd.commargv = (char **)realloc(cmd.commargv, (cmd.commargc + 1) * sizeof(char *))) == NULL) {
|
||||
die(STATE_UNKNOWN, _("Can not (re)allocate 'commargv' buffer\n"));
|
||||
}
|
||||
|
||||
commargv[commargc - 1] = strdup(str);
|
||||
commargv[commargc] = NULL;
|
||||
cmd.commargv[cmd.commargc - 1] = strdup(str);
|
||||
cmd.commargv[cmd.commargc] = NULL;
|
||||
|
||||
return cmd;
|
||||
}
|
||||
|
||||
int validate_arguments(void) {
|
||||
if (remotecmd == NULL || hostname == NULL) {
|
||||
return ERROR;
|
||||
check_by_ssh_config_wrapper validate_arguments(check_by_ssh_config_wrapper config_wrapper) {
|
||||
if (config_wrapper.config.remotecmd == NULL || config_wrapper.config.hostname == NULL) {
|
||||
config_wrapper.errorcode = ERROR;
|
||||
return config_wrapper;
|
||||
}
|
||||
|
||||
if (passive && commands != services) {
|
||||
if (config_wrapper.config.passive && config_wrapper.config.commands != config_wrapper.config.number_of_services) {
|
||||
die(STATE_UNKNOWN, _("%s: In passive mode, you must provide a service name for each command.\n"), progname);
|
||||
}
|
||||
|
||||
if (passive && host_shortname == NULL) {
|
||||
if (config_wrapper.config.passive && config_wrapper.config.host_shortname == NULL) {
|
||||
die(STATE_UNKNOWN, _("%s: In passive mode, you must provide the host short name from the monitoring configs.\n"), progname);
|
||||
}
|
||||
|
||||
return OK;
|
||||
return config_wrapper;
|
||||
}
|
||||
|
||||
void print_help(void) {
|
||||
|
|
|
|||
56
plugins/check_by_ssh.d/config.h
Normal file
56
plugins/check_by_ssh.d/config.h
Normal file
|
|
@ -0,0 +1,56 @@
|
|||
#pragma once
|
||||
|
||||
#include "../../config.h"
|
||||
#include <stddef.h>
|
||||
|
||||
typedef struct {
|
||||
int commargc;
|
||||
char **commargv;
|
||||
} command_construct;
|
||||
|
||||
typedef struct {
|
||||
char *hostname;
|
||||
char *host_shortname;
|
||||
|
||||
char **service;
|
||||
unsigned int number_of_services;
|
||||
|
||||
unsigned int commands; // Not needed during actual test run
|
||||
char *remotecmd;
|
||||
|
||||
command_construct cmd;
|
||||
|
||||
bool unknown_timeout;
|
||||
bool warn_on_stderr;
|
||||
int skip_stdout;
|
||||
int skip_stderr;
|
||||
bool passive;
|
||||
char *outputfile;
|
||||
} check_by_ssh_config;
|
||||
|
||||
check_by_ssh_config check_by_ssh_config_init() {
|
||||
check_by_ssh_config tmp = {
|
||||
.hostname = NULL,
|
||||
.host_shortname = NULL,
|
||||
|
||||
.service = NULL,
|
||||
.number_of_services = 0,
|
||||
|
||||
.commands = 0,
|
||||
.remotecmd = "",
|
||||
|
||||
.cmd =
|
||||
{
|
||||
.commargc = 0,
|
||||
.commargv = NULL,
|
||||
},
|
||||
|
||||
.unknown_timeout = false,
|
||||
.warn_on_stderr = false,
|
||||
.skip_stderr = 0,
|
||||
.skip_stdout = 0,
|
||||
.passive = false,
|
||||
.outputfile = NULL,
|
||||
};
|
||||
return tmp;
|
||||
}
|
||||
Loading…
Reference in a new issue