/****************************************************************************** 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: check_pgsql.c,v 1.31 2004/12/25 23:17:44 opensides Exp $ *****************************************************************************/ const char *progname = "check_pgsql"; const char *revision = "$Revision: 1.31 $"; const char *copyright = "1999-2004"; const char *email = "nagiosplug-devel@lists.sourceforge.net"; #include "common.h" #include "utils.h" #include "netutils.h" #include #define DEFAULT_DB "template1" #define DEFAULT_HOST "127.0.0.1" enum { DEFAULT_PORT = 5432, DEFAULT_WARN = 2, DEFAULT_CRIT = 8 }; int process_arguments (int, char **); int validate_arguments (void); void print_usage (void); void print_help (void); int is_pg_dbname (char *); int is_pg_logname (char *); char *pghost = NULL; /* host name of the backend server */ char *pgport = NULL; /* port of the backend server */ int default_port = DEFAULT_PORT; char *pgoptions = NULL; char *pgtty = NULL; char dbName[NAMEDATALEN] = DEFAULT_DB; char *pguser = NULL; char *pgpasswd = NULL; double twarn = (double)DEFAULT_WARN; double tcrit = (double)DEFAULT_CRIT; PGconn *conn; /*PGresult *res;*/ /****************************************************************************** The (psuedo?)literate programming XML is contained within \@\@\- \-\@\@ tags in the comments. With in the tags, the XML is assembled sequentially. You can define entities in tags. You also have all the #defines available as entities. Please note that all tags must be lowercase to use the DocBook XML DTD. @@-
Quick Reference 5 &progname; &SUMMARY; FAQ Theory, Installation, and Operation General Description &DESCRIPTION; Future Enhancements ToDo List Add option to get password from a secured file rather than the command line Add option to specify the query to execute Functions -@@ ******************************************************************************/ int main (int argc, char **argv) { int elapsed_time; int status = STATE_UNKNOWN; /* begin, by setting the parameters for a backend connection if the * parameters are null, then the system will try to use reasonable * defaults by looking up environment variables or, failing that, * using hardwired constants */ pgoptions = NULL; /* special options to start up the backend server */ pgtty = NULL; /* debugging tty for the backend server */ setlocale (LC_ALL, ""); bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); if (process_arguments (argc, argv) == ERROR) usage4 (_("Could not parse arguments")); /* Set signal handling and alarm */ if (signal (SIGALRM, timeout_alarm_handler) == SIG_ERR) { usage4 (_("Cannot catch SIGALRM")); } alarm (timeout_interval); /* make a connection to the database */ time (&start_time); conn = PQsetdbLogin (pghost, pgport, pgoptions, pgtty, dbName, pguser, pgpasswd); time (&end_time); elapsed_time = (int) (end_time - start_time); /* check to see that the backend connection was successfully made */ if (PQstatus (conn) == CONNECTION_BAD) { printf (_("CRITICAL - no connection to '%s' (%s).\n"), dbName, PQerrorMessage (conn)); PQfinish (conn); return STATE_CRITICAL; } else if (elapsed_time > tcrit) { status = STATE_CRITICAL; } else if (elapsed_time > twarn) { status = STATE_WARNING; } else { status = STATE_OK; } PQfinish (conn); printf (_(" %s - database %s (%d sec.)|%s\n"), state_text(status), dbName, elapsed_time, fperfdata("time", elapsed_time, "s", (int)twarn, twarn, (int)tcrit, tcrit, TRUE, 0, FALSE,0)); return status; } /* process command-line arguments */ int process_arguments (int argc, char **argv) { int c; int option = 0; static struct option longopts[] = { {"help", no_argument, 0, 'h'}, {"version", no_argument, 0, 'V'}, {"timeout", required_argument, 0, 't'}, {"critical", required_argument, 0, 'c'}, {"warning", required_argument, 0, 'w'}, {"hostname", required_argument, 0, 'H'}, {"logname", required_argument, 0, 'l'}, {"password", required_argument, 0, 'p'}, {"authorization", required_argument, 0, 'a'}, {"port", required_argument, 0, 'P'}, {"database", required_argument, 0, 'd'}, {0, 0, 0, 0} }; while (1) { c = getopt_long (argc, argv, "hVt:c:w:H:P:d:l:p:a:", longopts, &option); if (c == EOF) break; switch (c) { case '?': /* usage */ usage2 (_("Unknown argument"), optarg); case 'h': /* help */ print_help (); exit (STATE_OK); case 'V': /* version */ print_revision (progname, revision); exit (STATE_OK); case 't': /* timeout period */ if (!is_integer (optarg)) usage2 (_("Timeout interval must be a positive integer"), optarg); else timeout_interval = atoi (optarg); break; case 'c': /* critical time threshold */ if (!is_nonnegative (optarg)) usage2 (_("Critical threshold must be a positive integer"), optarg); else tcrit = strtod (optarg, NULL); break; case 'w': /* warning time threshold */ if (!is_nonnegative (optarg)) usage2 (_("Warning threshold must be a positive integer"), optarg); else twarn = strtod (optarg, NULL); break; case 'H': /* host */ if (!is_host (optarg)) usage2 (_("Invalid hostname/address"), optarg); else pghost = optarg; break; case 'P': /* port */ if (!is_integer (optarg)) usage2 (_("Port must be a positive integer"), optarg); else pgport = optarg; break; case 'd': /* database name */ if (!is_pg_dbname (optarg)) /* checks length and valid chars */ usage2 (_("Database name is not valid"), optarg); else /* we know length, and know optarg is terminated, so us strcpy */ strcpy (dbName, optarg); break; case 'l': /* login name */ if (!is_pg_logname (optarg)) usage2 (_("User name is not valid"), optarg); else pguser = optarg; break; case 'p': /* authentication password */ case 'a': pgpasswd = optarg; break; } } return validate_arguments (); } /****************************************************************************** @@- validate_arguments &PROTO_validate_arguments; Given a database name, this function returns TRUE if the string is a valid PostgreSQL database name, and returns false if it is not. Valid PostgreSQL database names are less than &NAMEDATALEN; characters long and consist of letters, numbers, and underscores. The first character cannot be a number, however. -@@ ******************************************************************************/ int validate_arguments () { return OK; } /****************************************************************************** @@- is_pg_dbname &PROTO_is_pg_dbname; Given a database name, this function returns TRUE if the string is a valid PostgreSQL database name, and returns false if it is not. Valid PostgreSQL database names are less than &NAMEDATALEN; characters long and consist of letters, numbers, and underscores. The first character cannot be a number, however. -@@ ******************************************************************************/ int is_pg_dbname (char *dbname) { char txt[NAMEDATALEN]; char tmp[NAMEDATALEN]; if (strlen (dbname) > NAMEDATALEN - 1) return (FALSE); strncpy (txt, dbname, NAMEDATALEN - 1); txt[NAMEDATALEN - 1] = 0; if (sscanf (txt, "%[_a-zA-Z]%[^_a-zA-Z0-9]", tmp, tmp) == 1) return (TRUE); if (sscanf (txt, "%[_a-zA-Z]%[_a-zA-Z0-9]%[^_a-zA-Z0-9]", tmp, tmp, tmp) == 2) return (TRUE); return (FALSE); } /** the tango program should eventually create an entity here based on the function prototype @@- is_pg_logname &PROTO_is_pg_logname; Given a username, this function returns TRUE if the string is a valid PostgreSQL username, and returns false if it is not. Valid PostgreSQL usernames are less than &NAMEDATALEN; characters long and consist of letters, numbers, dashes, and underscores, plus possibly some other characters. Currently this function only checks string length. Additional checks should be added. -@@ ******************************************************************************/ int is_pg_logname (char *username) { if (strlen (username) > NAMEDATALEN - 1) return (FALSE); return (TRUE); } /****************************************************************************** @@-
-@@ ******************************************************************************/ void print_help (void) { char *myport; asprintf (&myport, "%d", DEFAULT_PORT); print_revision (progname, revision); printf (COPYRIGHT, copyright, email); printf (_("Test whether a PostgreSQL Database is accepting connections.\n\n")); print_usage (); printf (_(UT_HELP_VRSN)); printf (_(UT_HOST_PORT), 'P', myport); printf (_(UT_IPv46)); printf (_("\ -d, --database=STRING\n\ Database to check (default: %s)\n\ -l, --logname = STRING\n\ Login name of user\n\ -p, --password = STRING\n\ Password (BIG SECURITY ISSUE)\n"), DEFAULT_DB); printf (_(UT_WARN_CRIT)); printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT); printf (_(UT_VERBOSE)); printf (_("\nAll parameters are optional.\n\ \n\ This plugin tests a PostgreSQL DBMS to determine whether it is active and\n\ accepting queries. In its current operation, it simply connects to the\n\ specified database, and then disconnects. If no database is specified, it\n\ connects to the template1 database, which is present in every functioning \n\ PostgreSQL DBMS.\n")); printf (_("\n\ The plugin will connect to a local postmaster if no host is specified. To\n\ connect to a remote host, be sure that the remote postmaster accepts TCP/IP\n\ connections (start the postmaster with the -i option).\n")); printf (_("\n\ Typically, the nagios user (unless the --logname option is used) should be\n\ able to connect to the database without a password. The plugin can also send\n\ a password, but no effort is made to obsure or encrypt the password.\n")); printf (_(UT_SUPPORT)); } void print_usage (void) { printf ("\ Usage: %s [-H ] [-P ] [-c ] [-w ]\n\ [-t ] [-d ] [-l ] [-p ]\n", progname); }