From a228492c4bea15a3e6e7bdbfd6631611c97fe92c Mon Sep 17 00:00:00 2001
From: Karl DeBisschop <kdebisschop@users.sourceforge.net>
Date: Sat, 9 Aug 2003 06:01:03 +0000
Subject: [PATCH] more pedantic compiler warns

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@672 f882894a-f735-0410-b71e-b25c423dba1c
---
 plugins/check_dig.c      |   4 +-
 plugins/check_http.c     |   1 +
 plugins/check_load.c     |   6 +-
 plugins/check_mrtg.c     | 165 +++++++++++++++++++++------------------
 plugins/check_mrtgtraf.c | 119 ++++++++++++++++------------
 plugins/check_nwstat.c   |  33 +++++---
 plugins/check_overcr.c   |  26 +++---
 plugins/check_ping.c     |  32 ++++----
 plugins/check_procs.c    | 109 ++++++++++++++------------
 plugins/check_real.c     |  31 ++++----
 plugins/utils.c          |   6 +-
 plugins/utils.h          |   6 +-
 12 files changed, 301 insertions(+), 237 deletions(-)

diff --git a/plugins/check_dig.c b/plugins/check_dig.c
index 7c39a24..ff16059 100644
--- a/plugins/check_dig.c
+++ b/plugins/check_dig.c
@@ -97,7 +97,7 @@ main (int argc, char **argv)
 				input_buffer[strcspn (input_buffer, "\r\n")] = '\0';
 
 			if (strstr (input_buffer, query_address) == input_buffer) {
-				asprintf (&output, input_buffer);
+				output = strdup(input_buffer);
 				result = STATE_OK;
 			}
 			else {
@@ -119,7 +119,7 @@ main (int argc, char **argv)
 		result = max_state (result, STATE_WARNING);
 		printf ("%s", input_buffer);
 		if (strlen (output) == 0)
-			asprintf (&output, 1 + index (input_buffer, ':'));
+			output = strdup (1 + index (input_buffer, ':'));
 	}
 
 	(void) fclose (child_stderr);
diff --git a/plugins/check_http.c b/plugins/check_http.c
index e2047ed..3321d5a 100644
--- a/plugins/check_http.c
+++ b/plugins/check_http.c
@@ -992,6 +992,7 @@ print_help (void)
 {
 	print_revision (progname, revision);
 
+	printf (_("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n"));
 	printf (_(COPYRIGHT), copyright, email);
 
 	printf (_("\
diff --git a/plugins/check_load.c b/plugins/check_load.c
index 4a38e6c..bdb1e55 100644
--- a/plugins/check_load.c
+++ b/plugins/check_load.c
@@ -45,7 +45,7 @@ void print_usage (void);
 float wload1 = -1, wload5 = -1, wload15 = -1;
 float cload1 = -1, cload5 = -1, cload15 = -1;
 
-char *status_line = "";
+char *status_line;
 
 
 
@@ -72,7 +72,7 @@ main (int argc, char **argv)
 	float la1, la5, la15;
 
 	if (process_arguments (argc, argv) == ERROR)
-		usage ("\n");
+		usage ("failed processing arguments\n");
 
 #if HAVE_GETLOADAVG==1
 	result = getloadavg (la, 3);
@@ -122,7 +122,7 @@ main (int argc, char **argv)
 # endif
 #endif
 
-	if ((la1 == -1) || (la5 == -1) || (la15 == -1)) {
+	if ((la1 < 0.0) || (la5 < 0.0) || (la15 < 0.0)) {
 #if HAVE_GETLOADAVG==1
 		printf (_("Error in getloadavg()\n"));
 #else
diff --git a/plugins/check_mrtg.c b/plugins/check_mrtg.c
index 2a9958d..21efac2 100644
--- a/plugins/check_mrtg.c
+++ b/plugins/check_mrtg.c
@@ -24,80 +24,10 @@ const char *email = "nagiosplug-devel@lists.sourceforge.net";
 #include "common.h"
 #include "utils.h"
 
-/* original command line: 
-	 <log_file> <expire_minutes> <AVG|MAX> <variable> <vwl> <vcl> <label> [units] */
-
-void
-print_usage (void)
-{
-	printf (_("\
-Usage: %s -F log_file -a <AVG | MAX> -v variable -w warning -c critical\n\
-  [-l label] [-u units] [-e expire_minutes] [-t timeout] [-v]\n"), progname);
-	printf (_(UT_HLP_VRS), progname, progname);
-}
-
-void
-print_help (void)
-{
-	print_revision (progname, revision);
-
-	printf (_(COPYRIGHT), copyright, email);
-
-	printf(_("\
-This plugin will check either the average or maximum value of one of the\n\
-two variables recorded in an MRTG log file.\n"));
-
-	print_usage ();
-
-	printf (_(UT_HELP_VRSN));
-
-	printf (_("\
- -F, --logfile=FILE\n\
-   The MRTG log file containing the data you want to monitor\n\
- -e, --expires=MINUTES\n\
-   Minutes before MRTG data is considered to be too old\n\
- -a, --aggregation=AVG|MAX\n\
-   Should we check average or maximum values?\n\
- -v, --variable=INTEGER\n\
-   Which variable set should we inspect? (1 or 2)\n\
- -w, --warning=INTEGER\n\
-   Threshold value for data to result in WARNING status\n\
- -c, --critical=INTEGER\n\
-   Threshold value for data to result in CRITICAL status\n"));
-
-	printf (_("\
- -l, --label=STRING\n\
-   Type label for data (Examples: Conns, \"Processor Load\", In, Out)\n\
- -u, --units=STRING\n\
-   Option units label for data (Example: Packets/Sec, Errors/Sec, \n\
-   \"Bytes Per Second\", \"%% Utilization\")\n"));
-
-	printf (_("\
-If the value exceeds the <vwl> threshold, a WARNING status is returned.  If\n\
-the value exceeds the <vcl> threshold, a CRITICAL status is returned.  If\n\
-the data in the log file is older than <expire_minutes> old, a WARNING\n\
-status is returned and a warning message is printed.\n\n"));
-
-	printf(_("This plugin is useful for monitoring MRTG data that does not correspond to\n\
-bandwidth usage.  (Use the check_mrtgtraf plugin for monitoring bandwidth).\n\
-It can be used to monitor any kind of data that MRTG is monitoring - errors,\n\
-packets/sec, etc.  I use MRTG in conjuction with the Novell NLM that allows\n\
-me to track processor utilization, user connections, drive space, etc and\n\
-this plugin works well for monitoring that kind of data as well.\n\n"));
-
-	printf (_("Notes:\n\
-- This plugin only monitors one of the two variables stored in the MRTG log\n\
-  file.  If you want to monitor both values you will have to define two\n\
-  commands with different values for the <variable> argument.  Of course,\n\
-  you can always hack the code to make this plugin work for you...\n\
-- MRTG stands for the Multi Router Traffic Grapher.  It can be downloaded from\n\
-  http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/mrtg.html\n"));
-
-	printf (_(UT_SUPPORT));
-}
-
 int process_arguments (int, char **);
 int validate_arguments (void);
+void print_help (void);
+void print_usage (void);
 
 char *log_file = NULL;
 int expire_minutes = 0;
@@ -105,8 +35,8 @@ int use_average = TRUE;
 int variable_number = -1;
 unsigned long value_warning_threshold = 0L;
 unsigned long value_critical_threshold = 0L;
-char *value_label = "";
-char *units_label = "";
+char *value_label;
+char *units_label;
 
 int
 main (int argc, char **argv)
@@ -351,5 +281,92 @@ validate_arguments (void)
 	if (variable_number == -1)
 		usage (_("You must supply the variable number\n"));
 
+	if (value_label == NULL)
+		value_label = strdup ("");
+
+	if (units_label == NULL)
+		units_label = strdup ("");
+
 	return OK;
 }
+
+
+
+
+
+
+void
+print_help (void)
+{
+	print_revision (progname, revision);
+
+	printf (_("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n"));
+	printf (_(COPYRIGHT), copyright, email);
+
+	printf(_("\
+This plugin will check either the average or maximum value of one of the\n\
+two variables recorded in an MRTG log file.\n"));
+
+	print_usage ();
+
+	printf (_(UT_HELP_VRSN));
+
+	printf (_("\
+ -F, --logfile=FILE\n\
+   The MRTG log file containing the data you want to monitor\n\
+ -e, --expires=MINUTES\n\
+   Minutes before MRTG data is considered to be too old\n\
+ -a, --aggregation=AVG|MAX\n\
+   Should we check average or maximum values?\n\
+ -v, --variable=INTEGER\n\
+   Which variable set should we inspect? (1 or 2)\n\
+ -w, --warning=INTEGER\n\
+   Threshold value for data to result in WARNING status\n\
+ -c, --critical=INTEGER\n\
+   Threshold value for data to result in CRITICAL status\n"));
+
+	printf (_("\
+ -l, --label=STRING\n\
+   Type label for data (Examples: Conns, \"Processor Load\", In, Out)\n\
+ -u, --units=STRING\n\
+   Option units label for data (Example: Packets/Sec, Errors/Sec, \n\
+   \"Bytes Per Second\", \"%% Utilization\")\n"));
+
+	printf (_("\
+If the value exceeds the <vwl> threshold, a WARNING status is returned.  If\n\
+the value exceeds the <vcl> threshold, a CRITICAL status is returned.  If\n\
+the data in the log file is older than <expire_minutes> old, a WARNING\n\
+status is returned and a warning message is printed.\n\n"));
+
+	printf(_("This plugin is useful for monitoring MRTG data that does not correspond to\n\
+bandwidth usage.  (Use the check_mrtgtraf plugin for monitoring bandwidth).\n\
+It can be used to monitor any kind of data that MRTG is monitoring - errors,\n\
+packets/sec, etc.  I use MRTG in conjuction with the Novell NLM that allows\n\
+me to track processor utilization, user connections, drive space, etc and\n\
+this plugin works well for monitoring that kind of data as well.\n\n"));
+
+	printf (_("Notes:\n\
+- This plugin only monitors one of the two variables stored in the MRTG log\n\
+  file.  If you want to monitor both values you will have to define two\n\
+  commands with different values for the <variable> argument.  Of course,\n\
+  you can always hack the code to make this plugin work for you...\n\
+- MRTG stands for the Multi Router Traffic Grapher.  It can be downloaded from\n\
+  http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/mrtg.html\n"));
+
+	printf (_(UT_SUPPORT));
+}
+
+
+
+
+/* original command line: 
+	 <log_file> <expire_minutes> <AVG|MAX> <variable> <vwl> <vcl> <label> [units] */
+
+void
+print_usage (void)
+{
+	printf (_("\
+Usage: %s -F log_file -a <AVG | MAX> -v variable -w warning -c critical\n\
+  [-l label] [-u units] [-e expire_minutes] [-t timeout] [-v]\n"), progname);
+	printf (_(UT_HLP_VRS), progname, progname);
+}
diff --git a/plugins/check_mrtgtraf.c b/plugins/check_mrtgtraf.c
index ce9ab19..be2f562 100644
--- a/plugins/check_mrtgtraf.c
+++ b/plugins/check_mrtgtraf.c
@@ -24,60 +24,10 @@ const char *revision = "$Revision$";
 const char *copyright = "1999-2003";
 const char *email = "nagiosplug-devel@lists.sourceforge.net";
 
-void
-print_usage (void)
-{
-	printf (_("\
-Usage: %s -F <log_file> -a <AVG | MAX> -v <variable> -w <warning_pair> -c <critical_pair>\n\
-  [-e expire_minutes] [-t timeout] [-v]\n"), progname);
-	printf (_(UT_HLP_VRS), progname, progname);
-}
-
-void
-print_help (void)
-{
-	print_revision (progname, revision);
-
-	printf (_(COPYRIGHT), copyright, email);
-
-	print_usage ();
-
-	printf (_(UT_HELP_VRSN));
-
-	printf (_("\
- -F, --filename=STRING\n\
-   File to read log from\n\
- -e, --expires=INTEGER\n\
-   Minutes after which log expires\n\
- -a, --aggregation=(AVG|MAX)\n\
-   Test average or maximum\n\
- -w, --warning\n\
-   Warning threshold pair \"<incoming>,<outgoing>\"\n\
- -c, --critical\n\
-   Critical threshold pair \"<incoming>,<outgoing>\"\n"));
-
-	printf (_("\n\
-This plugin will check the incoming/outgoing transfer rates of a router,\n\
-switch, etc recorded in an MRTG log.  If the newest log entry is older\n\
-than <expire_minutes>, a WARNING status is returned. If either the\n\
-incoming or outgoing rates exceed the <icl> or <ocl> thresholds (in\n\
-Bytes/sec), a CRITICAL status results.  If either of the rates exceed\n\
-the <iwl> or <owl> thresholds (in Bytes/sec), a WARNING status results.\n\n"));
-
-	printf (_("Notes:\n\
-- MRTG stands for Multi Router Traffic Grapher. It can be downloaded from\n\
-  http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/mrtg.html\n\
-- While MRTG can monitor things other than traffic rates, this\n\
-  plugin probably won't work with much else without modification.\n\
-- The calculated i/o rates are a little off from what MRTG actually\n\
-  reports.  I'm not sure why this is right now, but will look into it\n\
-  for future enhancements of this plugin.\n"));
-
-	printf (_(UT_SUPPORT));
-}
-
 int process_arguments (int, char **);
 int validate_arguments (void);
+void print_help(void);
+void print_usage(void);
 
 char *log_file = NULL;
 int expire_minutes = -1;
@@ -87,6 +37,10 @@ unsigned long incoming_critical_threshold = 0L;
 unsigned long outgoing_warning_threshold = 0L;
 unsigned long outgoing_critical_threshold = 0L;
 
+
+
+
+
 int
 main (int argc, char **argv)
 {
@@ -357,3 +311,64 @@ validate_arguments (void)
 {
 	return OK;
 }
+
+
+
+
+
+
+void
+print_help (void)
+{
+	print_revision (progname, revision);
+
+	printf (_("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n"));
+	printf (_(COPYRIGHT), copyright, email);
+
+	print_usage ();
+
+	printf (_(UT_HELP_VRSN));
+
+	printf (_("\
+ -F, --filename=STRING\n\
+   File to read log from\n\
+ -e, --expires=INTEGER\n\
+   Minutes after which log expires\n\
+ -a, --aggregation=(AVG|MAX)\n\
+   Test average or maximum\n\
+ -w, --warning\n\
+   Warning threshold pair \"<incoming>,<outgoing>\"\n\
+ -c, --critical\n\
+   Critical threshold pair \"<incoming>,<outgoing>\"\n"));
+
+	printf (_("\n\
+This plugin will check the incoming/outgoing transfer rates of a router,\n\
+switch, etc recorded in an MRTG log.  If the newest log entry is older\n\
+than <expire_minutes>, a WARNING status is returned. If either the\n\
+incoming or outgoing rates exceed the <icl> or <ocl> thresholds (in\n\
+Bytes/sec), a CRITICAL status results.  If either of the rates exceed\n\
+the <iwl> or <owl> thresholds (in Bytes/sec), a WARNING status results.\n\n"));
+
+	printf (_("Notes:\n\
+- MRTG stands for Multi Router Traffic Grapher. It can be downloaded from\n\
+  http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/mrtg.html\n\
+- While MRTG can monitor things other than traffic rates, this\n\
+  plugin probably won't work with much else without modification.\n\
+- The calculated i/o rates are a little off from what MRTG actually\n\
+  reports.  I'm not sure why this is right now, but will look into it\n\
+  for future enhancements of this plugin.\n"));
+
+	printf (_(UT_SUPPORT));
+}
+
+
+
+
+void
+print_usage (void)
+{
+	printf (_("\
+Usage: %s -F <log_file> -a <AVG | MAX> -v <variable> -w <warning_pair> -c <critical_pair>\n\
+  [-e expire_minutes] [-t timeout] [-v]\n"), progname);
+	printf (_(UT_HLP_VRS), progname, progname);
+}
diff --git a/plugins/check_nwstat.c b/plugins/check_nwstat.c
index de8a620..4b22726 100644
--- a/plugins/check_nwstat.c
+++ b/plugins/check_nwstat.c
@@ -75,9 +75,14 @@ enum checkvar vars_to_check = NONE;
 int sap_number=-1;
 
 int process_arguments(int, char **);
-void print_usage(void);
 void print_help(void);
+void print_usage(void);
+
+
 
+
+
+
 int
 main(int argc, char **argv) {
 	int result;
@@ -878,15 +883,12 @@ int process_arguments(int argc, char **argv) {
 
 	return OK;
 }
-
-void print_usage(void)
-{
-	printf (_("\
-Usage: %s -H host [-p port] [-v variable] [-w warning] [-c critical]\n\
-  [-t timeout].\n"), progname);
-	printf (_(UT_HLP_VRS), progname, progname);
-}
 
+
+
+
+
+
 void print_help(void)
 {
 	char *myport;
@@ -894,7 +896,7 @@ void print_help(void)
 
 	print_revision (progname, revision);
 
-	printf (_("Copyright (c) 1999-2001 Ethan Galstad <nagios@nagios.org>\n"));
+	printf (_("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n"));
 	printf (_(COPYRIGHT), copyright, email);
 
 	printf (_("\
@@ -972,3 +974,14 @@ Notes:\n\
 
 	printf (_(UT_SUPPORT));
 }
+
+
+
+
+void print_usage(void)
+{
+	printf (_("\
+Usage: %s -H host [-p port] [-v variable] [-w warning] [-c critical]\n\
+  [-t timeout].\n"), progname);
+	printf (_(UT_HLP_VRS), progname, progname);
+}
diff --git a/plugins/check_overcr.c b/plugins/check_overcr.c
index 5f50ca7..9958432 100644
--- a/plugins/check_overcr.c
+++ b/plugins/check_overcr.c
@@ -106,17 +106,20 @@ main (int argc, char **argv)
 		temp_ptr = (char *) strtok (recv_buffer, "\r\n");
 		if (temp_ptr == NULL)
 			die (STATE_CRITICAL, _("Invalid response from server - no load information\n"));
-		load_1min = strtod (temp_ptr, NULL);
+		else
+			load_1min = strtod (temp_ptr, NULL);
 
 		temp_ptr = (char *) strtok (NULL, "\r\n");
 		if (temp_ptr == NULL)
 			die (STATE_CRITICAL, _("Invalid response from server after load 1\n"));
-		load_5min = strtod (temp_ptr, NULL);
+		else
+			load_5min = strtod (temp_ptr, NULL);
 
 		temp_ptr = (char *) strtok (NULL, "\r\n");
 		if (temp_ptr == NULL)
 			die (STATE_CRITICAL, _("Invalid response from server after load 5\n"));
-		load_15min = strtod (temp_ptr, NULL);
+		else
+			load_15min = strtod (temp_ptr, NULL);
 
 		switch (vars_to_check) {
 		case LOAD1:
@@ -160,7 +163,8 @@ main (int argc, char **argv)
 				temp_ptr = (char *) strtok (NULL, "%");
 				if (temp_ptr == NULL)
 					die (STATE_CRITICAL, _("Invalid response from server\n"));
-				percent_used_disk_space = strtoul (temp_ptr, NULL, 10);
+				else
+					percent_used_disk_space = strtoul (temp_ptr, NULL, 10);
 				break;
 			}
 
@@ -186,8 +190,8 @@ main (int argc, char **argv)
 
 		if (result != STATE_OK)
 			die (result, _("Unknown error fetching network status\n"));
-
-		port_connections = strtod (recv_buffer, NULL);
+		else
+			port_connections = strtod (recv_buffer, NULL);
 
 		if (check_critical_value == TRUE && (port_connections >= critical_value))
 			result = STATE_CRITICAL;
@@ -215,8 +219,8 @@ main (int argc, char **argv)
 		temp_ptr = (char *) strtok (NULL, ")");
 		if (temp_ptr == NULL)
 			die (STATE_CRITICAL, _("Invalid response from server\n"));
-
-		processes = strtod (temp_ptr, NULL);
+		else
+			processes = strtod (temp_ptr, NULL);
 
 		if (check_critical_value == TRUE && (processes >= critical_value))
 			result = STATE_CRITICAL;
@@ -264,11 +268,11 @@ main (int argc, char **argv)
 	}
 
 	/* reset timeout */
-	alarm (0);
+/* 	alarm (0); */
 
-	printf (_("Reached end of program with no data returned\n"));
+/* 	printf (_("Reached end of program with no data returned\n")); */
 
-	return result;
+/* 	return result; */
 }
 
 
diff --git a/plugins/check_ping.c b/plugins/check_ping.c
index 26c0192..fd73b8c 100644
--- a/plugins/check_ping.c
+++ b/plugins/check_ping.c
@@ -55,7 +55,7 @@ int verbose = FALSE;
 float rta = UNKNOWN_TRIP_TIME;
 int pl = UNKNOWN_PACKET_LOSS;
 
-char *warn_text = "";
+char *warn_text;
 
 
 
@@ -69,11 +69,10 @@ main (int argc, char **argv)
 	int this_result = STATE_UNKNOWN;
 	int i;
 
-	addresses = malloc (max_addr);
+	addresses = malloc ((size_t)max_addr);
 
 	if (process_arguments (argc, argv) == ERROR)
 		usage (_("Could not parse arguments"));
-	exit;
 
 	/* Set signal handling and alarm */
 	if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR) {
@@ -113,7 +112,7 @@ main (int argc, char **argv)
 		/* run the command */
 		this_result = run_ping (cmd, addresses[i]);
 
-		if (pl == UNKNOWN_PACKET_LOSS || rta == UNKNOWN_TRIP_TIME) {
+		if (pl == UNKNOWN_PACKET_LOSS || rta < 0.0) {
 			printf ("%s\n", cmd);
 			die (STATE_UNKNOWN,
 			           _("Error: Could not interpret output from ping command\n"));
@@ -193,12 +192,15 @@ process_arguments (int argc, char **argv)
 		switch (c) {
 		case '?':	/* usage */
 			usage3 (_("Unknown argument"), optopt);
+			break;
 		case 'h':	/* help */
 			print_help ();
 			exit (STATE_OK);
+			break;
 		case 'V':	/* version */
 			print_revision (progname, revision);
 			exit (STATE_OK);
+			break;
 		case 't':	/* timeout period */
 			timeout_interval = atoi (optarg);
 			break;
@@ -221,7 +223,7 @@ process_arguments (int argc, char **argv)
 				n_addresses++;
 				if (n_addresses > max_addr) {
 					max_addr *= 2;
-					addresses = realloc (addresses, max_addr);
+					addresses = realloc (addresses, (size_t)max_addr);
 					if (addresses == NULL)
 						die (STATE_UNKNOWN, _("Could not realloc() addresses\n"));
 				}
@@ -292,7 +294,7 @@ process_arguments (int argc, char **argv)
 		}
 	}
 
-	if (wrta == UNKNOWN_TRIP_TIME) {
+	if (wrta < 0.0) {
 		if (is_negative (argv[c])) {
 			printf (_("<wrta> (%s) must be a non-negative number\n"), argv[c]);
 			return ERROR;
@@ -303,7 +305,7 @@ process_arguments (int argc, char **argv)
 		}
 	}
 
-	if (crta == UNKNOWN_TRIP_TIME) {
+	if (crta < 0.0) {
 		if (is_negative (argv[c])) {
 			printf (_("<crta> (%s) must be a non-negative number\n"), argv[c]);
 			return ERROR;
@@ -346,11 +348,11 @@ validate_arguments ()
 	float max_seconds;
 	int i;
 
-	if (wrta == UNKNOWN_TRIP_TIME) {
+	if (wrta < 0.0) {
 		printf (_("<wrta> was not set\n"));
 		return ERROR;
 	}
-	else if (crta == UNKNOWN_TRIP_TIME) {
+	else if (crta < 0.0) {
 		printf (_("<crta> was not set\n"));
 		return ERROR;
 	}
@@ -397,10 +399,9 @@ run_ping (char *cmd, char *server_address)
 	char buf[MAX_INPUT_BUFFER];
 	int result = STATE_UNKNOWN;
 
-	if ((child_process = spopen (cmd)) == NULL) {
-		printf (_("Cannot open pipe: "));
-		die (STATE_UNKNOWN, cmd);
-	}
+	if ((child_process = spopen (cmd)) == NULL)
+		die (STATE_UNKNOWN, _("Cannot open pipe: %s"), cmd);
+
 	child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
 	if (child_stderr == NULL)
 		printf (_("Cannot open stderr for %s\n"), cmd);
@@ -455,7 +456,7 @@ run_ping (char *cmd, char *server_address)
 			           _("PING CRITICAL - Host not found (%s)"),
 			           server_address);
 
-		if (strlen (warn_text) == 0)
+		if (warn_text == NULL)
 			warn_text = strdup (buf);
 		else if (asprintf (&warn_text, "%s %s", warn_text, buf) == -1)
 			die (STATE_UNKNOWN, _("unable to realloc warn_text"));
@@ -472,6 +473,9 @@ run_ping (char *cmd, char *server_address)
 	if (spclose (child_process))
 		result = max_state (result, STATE_WARNING);
 
+	if (warn_text == NULL)
+		warn_text = strdup("");
+
 	return result;
 }
 
diff --git a/plugins/check_procs.c b/plugins/check_procs.c
index 1b641c5..1894b28 100644
--- a/plugins/check_procs.c
+++ b/plugins/check_procs.c
@@ -49,12 +49,14 @@ int options = 0; /* bitmask of filter criteria to test against */
 #define PCPU 256
 
 /* Different metrics */
-int metric = 0;
-#define METRIC_PROCS 0
-#define METRIC_VSZ 1
-#define METRIC_RSS 2
-#define METRIC_CPU 3
-char *metric_name = "";
+char *metric_name;
+enum metric {
+	METRIC_PROCS,
+	METRIC_VSZ,
+	METRIC_RSS,
+	METRIC_CPU
+};
+enum metric metric = METRIC_PROCS;
 
 int verbose = 0;
 int uid;
@@ -62,11 +64,11 @@ int ppid;
 int vsz;
 int rss;
 float pcpu;
-char *statopts = "";
-char *prog = "";
-char *args = "";
-char *fmt = "";
-char *fails = "";
+char *statopts;
+char *prog;
+char *args;
+char *fmt;
+char *fails;
 char tmp[MAX_INPUT_BUFFER];
 
 
@@ -317,54 +319,35 @@ process_arguments (int argc, char **argv)
 			print_revision (progname, revision);
 			exit (STATE_OK);
 		case 't':									/* timeout period */
-			if (!is_integer (optarg)) {
-				printf (_("%s: Timeout Interval must be an integer!\n\n"),
-				        progname);
-				print_usage ();
-				exit (STATE_UNKNOWN);
-			}
-			timeout_interval = atoi (optarg);
+			if (!is_integer (optarg))
+				usage (_("Timeout Interval must be an integer!\n\n"));
+			else
+				timeout_interval = atoi (optarg);
 			break;
 		case 'c':									/* critical threshold */
-			if (is_integer (optarg)) {
+			if (is_integer (optarg))
 				cmax = atoi (optarg);
+			else if (sscanf (optarg, ":%d", &cmax) == 1)
 				break;
-			}
-			else if (sscanf (optarg, ":%d", &cmax) == 1) {
+			else if (sscanf (optarg, "%d:%d", &cmin, &cmax) == 2)
 				break;
-			}
-			else if (sscanf (optarg, "%d:%d", &cmin, &cmax) == 2) {
+			else if (sscanf (optarg, "%d:", &cmin) == 1)
 				break;
-			}
-			else if (sscanf (optarg, "%d:", &cmin) == 1) {
-				break;
-			}
-			else {
-				printf (_("%s: Critical Process Count must be an integer!\n\n"),
-				        progname);
-				print_usage ();
-				exit (STATE_UNKNOWN);
-			}
+			else
+				usage (_("Critical Process Count must be an integer!\n\n"));
+			break;							 
 		case 'w':									/* warning time threshold */
-			if (is_integer (optarg)) {
+			if (is_integer (optarg))
 				wmax = atoi (optarg);
+			else if (sscanf (optarg, ":%d", &wmax) == 1)
 				break;
-			}
-			else if (sscanf (optarg, ":%d", &wmax) == 1) {
-				break;
-			}
-			else if (sscanf (optarg, "%d:%d", &wmin, &wmax) == 2) {
+			else if (sscanf (optarg, "%d:%d", &wmin, &wmax) == 2)
 				break;
-			}
-			else if (sscanf (optarg, "%d:", &wmin) == 1) {
+			else if (sscanf (optarg, "%d:", &wmin) == 1)
 				break;
-			}
-			else {
-				printf (_("%s: Warning Process Count must be an integer!\n\n"),
-				        progname);
-				print_usage ();
-				exit (STATE_UNKNOWN);
-			}
+			else
+				usage (_("%s: Warning Process Count must be an integer!\n\n"));
+			break;
 		case 'p':									/* process id */
 			if (sscanf (optarg, "%d%[^0-9]", &ppid, tmp) == 1) {
 				asprintf (&fmt, "%s%sPPID = %d", fmt, (options ? ", " : ""), ppid);
@@ -376,7 +359,10 @@ process_arguments (int argc, char **argv)
 			print_usage ();
 			exit (STATE_UNKNOWN);
 		case 's':									/* status */
-			asprintf (&statopts, "%s", optarg);
+			if (statopts)
+				break;
+			else
+				statopts = strdup(optarg);
 			asprintf (&fmt, _("%s%sSTATE = %s"), fmt, (options ? ", " : ""), statopts);
 			options |= STAT;
 			break;
@@ -408,13 +394,19 @@ process_arguments (int argc, char **argv)
 			options |= USER;
 			break;
 		case 'C':									/* command */
-			asprintf (&prog, "%s", optarg);
+			if (prog)
+				break;
+			else
+				prog = strdup(optarg);
 			asprintf (&fmt, _("%s%scommand name '%s'"), fmt, (options ? ", " : ""),
 			          prog);
 			options |= PROG;
 			break;
 		case 'a':									/* args (full path name with args) */
-			asprintf (&args, "%s", optarg);
+			if (args)
+				break;
+			else
+				args = strdup(optarg);
 			asprintf (&fmt, _("%s%sargs '%s'"), fmt, (options ? ", " : ""), args);
 			options |= ARGS;
 			break;
@@ -521,6 +513,21 @@ validate_arguments ()
 	if (options == 0)
 		options = ALL;
 
+	if (statopts==NULL)
+		statopts = strdup("");
+
+	if (prog==NULL)
+		prog = strdup("");
+
+	if (args==NULL)
+		args = strdup("");
+
+	if (fmt==NULL)
+		fmt = strdup("");
+
+	if (fails==NULL)
+		fails = strdup("");
+
 	return options;
 }
 
diff --git a/plugins/check_real.c b/plugins/check_real.c
index ecdd561..9c9c3e0 100644
--- a/plugins/check_real.c
+++ b/plugins/check_real.c
@@ -38,10 +38,10 @@ void print_help (void);
 void print_usage (void);
 
 int server_port = PORT;
-char *server_address = "";
-char *host_name = "";
+char *server_address;
+char *host_name;
 char *server_url = NULL;
-char *server_expect = EXPECT;
+char *server_expect;
 int warning_time = 0;
 int check_warning_time = FALSE;
 int critical_time = 0;
@@ -294,18 +294,18 @@ process_arguments (int argc, char **argv)
 		switch (c) {
 		case 'I':									/* hostname */
 		case 'H':									/* hostname */
-			if (is_host (optarg)) {
-				server_address = optarg;
-			}
-			else {
+			if (server_address)
+				break;
+			else if (is_host (optarg))
+				server_address = strdup(optarg);
+			else
 				usage (_("Invalid host name\n"));
-			}
 			break;
 		case 'e':									/* string to expect in response header */
-			server_expect = optarg;
+			server_expect = strdup(optarg);
 			break;
 		case 'u':									/* server URL */
-			server_url = optarg;
+			server_url = strdup(optarg);
 			break;
 		case 'p':									/* port */
 			if (is_intpos (optarg)) {
@@ -356,7 +356,7 @@ process_arguments (int argc, char **argv)
 	}
 
 	c = optind;
-	if (strlen(server_address)==0 && argc>c) {
+	if (server_address==NULL && argc>c) {
 		if (is_host (argv[c])) {
 			server_address = argv[c++];
 		}
@@ -365,11 +365,14 @@ process_arguments (int argc, char **argv)
 		}
 	}
 
-	if (strlen(server_address) == 0)
+	if (server_address==NULL)
 		usage (_("You must provide a server to check\n"));
 
-	if (strlen(host_name) == 0)
-		asprintf (&host_name, "%s", server_address);
+	if (host_name==NULL)
+		host_name = strdup (server_address);
+
+	if (server_expect == NULL)
+		server_expect = strdup(EXPECT);
 
 	return validate_arguments ();
 }
diff --git a/plugins/utils.c b/plugins/utils.c
index 518caa8..5b97572 100644
--- a/plugins/utils.c
+++ b/plugins/utils.c
@@ -52,14 +52,14 @@ max_state (int a, int b)
 		return max (a, b);
 }
 
-void usage (char *msg)
+void usage (const char *msg)
 {
 	printf ("%s", msg);
 	print_usage ();
 	exit (STATE_UNKNOWN);
 }
 
-void usage2(char *msg, char *arg)
+void usage2(const char *msg, const char *arg)
 {
 	printf ("%s: %s - %s\n",progname,msg,arg);
 	print_usage ();
@@ -67,7 +67,7 @@ void usage2(char *msg, char *arg)
 }
 
 void
-usage3 (char *msg, int arg)
+usage3 (const char *msg, int arg)
 {
 	printf ("%s: %s - %c\n", progname, msg, arg);
 	print_usage();
diff --git a/plugins/utils.h b/plugins/utils.h
index b763b1e..efdbed4 100644
--- a/plugins/utils.h
+++ b/plugins/utils.h
@@ -71,9 +71,9 @@ char *strpcat (char *dest, const char *src, const char *str);
 
 int max_state (int a, int b);
 
-void usage (char *msg) __attribute__((noreturn));
-void usage2(char *msg, char *arg) __attribute__((noreturn));
-void usage3(char *msg, int arg) __attribute__((noreturn));
+void usage (const char *msg) __attribute__((noreturn));
+void usage2(const char *msg, const char *arg) __attribute__((noreturn));
+void usage3(const char *msg, int arg) __attribute__((noreturn));
 
 const char *state_text (int result);
 
-- 
2.30.2