monitoring-plugins/plugins/urlize.c

/*****************************************************************************
 *
 * Monitoring urlize plugin
 *
 * License: GPL
 * Copyright (c) 2000-2024 Monitoring Plugins Development Team
 *
 * Description:
 *
 * This file contains the urlize plugin
 *
 * This plugin wraps the text output of another command (plugin) in HTML <A>
 * tags.  This plugin returns the status of the invoked 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 = "urlize";
const char *copyright = "2000-2024";
const char *email = "devel@monitoring-plugins.org";

#include "common.h"
#include "utils.h"
#include "popen.h"

#define PERF_CHARACTER    "|"
#define NEWLINE_CHARACTER '\n'

void print_help(void);
void print_usage(void);

int main(int argc, char **argv) {
	int found = 0, result = STATE_UNKNOWN;
	char *url = NULL;
	char *cmd;
	char *buf;
	char *nstr;
	char tstr[MAX_INPUT_BUFFER];

	int c;
	int option = 0;
	static struct option longopts[] = {{"help", no_argument, 0, 'h'},
									   {"version", no_argument, 0, 'V'},
									   {"url", required_argument, 0, 'u'},
									   {0, 0, 0, 0}};

	setlocale(LC_ALL, "");
	bindtextdomain(PACKAGE, LOCALEDIR);
	textdomain(PACKAGE);

	/* Need at least 2 args */
	if (argc < 3) {
		print_help();
		exit(STATE_UNKNOWN);
	}

	while (1) {
		c = getopt_long(argc, argv, "+hVu:", longopts, &option);

		if (c == -1 || c == EOF) {
			break;
		}

		switch (c) {
		case 'h': /* help */
			print_help();
			exit(EXIT_SUCCESS);
			break;
		case 'V': /* version */
			print_revision(progname, NP_VERSION);
			exit(EXIT_SUCCESS);
			break;
		case 'u':
			url = strdup(argv[optind]);
			break;
		case '?':
		default:
			usage5();
		}
	}

	if (url == NULL) {
		url = strdup(argv[optind++]);
	}

	cmd = strdup(argv[optind++]);
	for (c = optind; c < argc; c++) {
		xasprintf(&cmd, "%s %s", cmd, argv[c]);
	}

	child_process = spopen(cmd);
	if (child_process == NULL) {
		printf(_("Could not open pipe: %s\n"), cmd);
		exit(STATE_UNKNOWN);
	}

	child_stderr = fdopen(child_stderr_array[fileno(child_process)], "r");
	if (child_stderr == NULL) {
		printf(_("Could not open stderr for %s\n"), cmd);
	}

	bzero(tstr, sizeof(tstr));
	buf = malloc(MAX_INPUT_BUFFER);
	printf("<A href=\"%s\">", argv[1]);
	while (fgets(buf, MAX_INPUT_BUFFER - 1, child_process)) {
		found++;
		/* Collect the string in temp str so we can tokenize */
		strcat(tstr, buf);
	}

	if (!found) {
		die(STATE_UNKNOWN, _("%s UNKNOWN - No data received from host\nCMD: %s</A>\n"), argv[0],
			cmd);
	}

	/* chop the newline character */
	if ((nstr = strchr(tstr, NEWLINE_CHARACTER)) != NULL) {
		*nstr = '\0';
	}

	/* tokenize the string for Perfdata if there is some */
	nstr = strtok(tstr, PERF_CHARACTER);
	printf("%s", nstr);
	printf("</A>");
	nstr = strtok(NULL, PERF_CHARACTER);
	if (nstr != NULL) {
		printf(" | %s", nstr);
	}

	/* close the pipe */
	result = spclose(child_process);

	/* WARNING if output found on stderr */
	if (fgets(buf, MAX_INPUT_BUFFER - 1, child_stderr)) {
		result = max_state(result, STATE_WARNING);
	}

	/* close stderr */
	(void)fclose(child_stderr);

	return result;
}

void print_help(void) {
	print_revision(progname, NP_VERSION);

	printf("Copyright (c) 2000 Karl DeBisschop <kdebisschop@users.sourceforge.net>\n");
	printf(COPYRIGHT, copyright, email);

	printf("%s\n", _("This plugin wraps the text output of another command (plugin) in HTML <A>"));
	printf("%s\n",
		   _("tags, thus displaying the child plugin's output as a clickable link in compatible"));
	printf("%s\n",
		   _("monitoring status screen. This plugin returns the status of the invoked plugin."));

	printf("\n\n");

	print_usage();

	printf(UT_HELP_VRSN);

	printf("\n");
	printf("%s\n", _("Examples:"));
	printf("%s\n",
		   _("Pay close attention to quoting to ensure that the shell passes the expected"));
	printf("%s\n\n", _("data to the plugin. For example, in:"));
	printf(" %s\n\n", _("urlize http://example.com/ check_http -H example.com -r 'two words'"));
	printf("    %s\n", _("the shell will remove the single quotes and urlize will see:"));
	printf(" %s\n\n", _("urlize http://example.com/ check_http -H example.com -r two words"));
	printf("    %s\n\n", _("You probably want:"));
	printf(" %s\n", _("urlize http://example.com/ \"check_http -H example.com -r 'two words'\""));

	printf(UT_SUPPORT);
}

void print_usage(void) {
	printf("%s\n", _("Usage:"));
	printf("%s <url> <plugin> <arg1> ... <argN>\n", progname);
}