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urlize.c

/*****************************************************************************
* 
* Nagios urlize plugin
* 
* License: GPL
* Copyright (c) 2000-2007 Nagios Plugins Development Team
* 
* Description:
* 
* This file contains the urlize plugin
* 
* This plugin wraps the text output of another command (plugin) in HTML <A>
* tags, thus displaying the child plugin's output as a clickable link in the
* Nagios status screen.  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 = "2000-2006";
const char *email = "nagiosplug-devel@lists.sourceforge.net";

#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++) {
            asprintf (&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)"));
  printf ("%s\n", _("in HTML <A> tags, thus displaying the child plugin's output as a clickable link in"));
  printf ("%s\n", _("the Nagios 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 (_("Usage:"));
      printf ("%s <url> <plugin> <arg1> ... <argN>\n", progname);
}

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