check_mrtg: cosmetic fixes, linter fixes

1 files changed, 48 insertions, 53 deletions

diff --git a/plugins/check_mrtg.c b/plugins/check_mrtg.c
index e82a0f9..632e66f 100644
--- a/plugins/check_mrtg.c
+++ b/plugins/check_mrtg.c
@@ -36,7 +36,7 @@ const char *email = "devel@monitoring-plugins.org";
 #include "common.h"
 #include "utils.h"
 
-static int process_arguments(int, char **);
+static int process_arguments(int /*argc*/, char ** /*argv*/);
 static int validate_arguments(void);
 static void print_help(void);
 void print_usage(void);
@@ -51,17 +51,6 @@ static char *label;
 static char *units;
 
 int main(int argc, char **argv) {
-        int result = STATE_OK;
-        FILE *fp;
-        int line;
-        char input_buffer[MAX_INPUT_BUFFER];
-        char *temp_buffer;
-        time_t current_time;
-        time_t timestamp = 0L;
-        unsigned long average_value_rate = 0L;
-        unsigned long maximum_value_rate = 0L;
-        unsigned long rate = 0L;
-
         setlocale(LC_ALL, "");
         bindtextdomain(PACKAGE, LOCALEDIR);
         textdomain(PACKAGE);
@@ -73,14 +62,18 @@ int main(int argc, char **argv) {
                 usage4(_("Could not parse arguments\n"));
 
         /* open the MRTG log file for reading */
-        fp = fopen(log_file, "r");
-        if (fp == NULL) {
+        FILE *mtrg_log_file = fopen(log_file, "r");
+        if (mtrg_log_file == NULL) {
                 printf(_("Unable to open MRTG log file\n"));
                 return STATE_UNKNOWN;
         }
 
-        line = 0;
-        while (fgets(input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
+        time_t timestamp = 0L;
+        unsigned long average_value_rate = 0L;
+        unsigned long maximum_value_rate = 0L;
+        char input_buffer[MAX_INPUT_BUFFER];
+        int line = 0;
+        while (fgets(input_buffer, MAX_INPUT_BUFFER - 1, mtrg_log_file)) {
 
                 line++;
 
@@ -93,7 +86,7 @@ int main(int argc, char **argv) {
                         break;
 
                 /* grab the timestamp */
-                temp_buffer = strtok(input_buffer, " ");
+                char *temp_buffer = strtok(input_buffer, " ");
                 timestamp = strtoul(temp_buffer, NULL, 10);
 
                 /* grab the average value 1 rate */
@@ -118,7 +111,7 @@ int main(int argc, char **argv) {
         }
 
         /* close the log file */
-        fclose(fp);
+        fclose(mtrg_log_file);
 
         /* if we couldn't read enough data, return an unknown error */
         if (line <= 2) {
@@ -127,18 +120,21 @@ int main(int argc, char **argv) {
         }
 
         /* make sure the MRTG data isn't too old */
+        time_t current_time;
         time(&current_time);
         if (expire_minutes > 0 && (current_time - timestamp) > (expire_minutes * 60)) {
                 printf(_("MRTG data has expired (%d minutes old)\n"), (int)((current_time - timestamp) / 60));
                 return STATE_WARNING;
         }
 
+        unsigned long rate = 0L;
         /* else check the incoming/outgoing rates */
         if (use_average)
                 rate = average_value_rate;
         else
                 rate = maximum_value_rate;
 
+        int result = STATE_OK;
         if (rate > value_critical_threshold)
                 result = STATE_CRITICAL;
         else if (rate > value_warning_threshold)
@@ -153,9 +149,6 @@ int main(int argc, char **argv) {
 
 /* process command-line arguments */
 int process_arguments(int argc, char **argv) {
-        int c;
-
-        int option = 0;
         static struct option longopts[] = {
                 {"logfile", required_argument, 0, 'F'},  {"expires", required_argument, 0, 'e'},  {"aggregation", required_argument, 0, 'a'},
                 {"variable", required_argument, 0, 'v'}, {"critical", required_argument, 0, 'c'}, {"warning", required_argument, 0, 'w'},
@@ -165,22 +158,24 @@ int process_arguments(int argc, char **argv) {
         if (argc < 2)
                 return ERROR;
 
-        for (c = 1; c < argc; c++) {
-                if (strcmp("-to", argv[c]) == 0)
-                        strcpy(argv[c], "-t");
-                else if (strcmp("-wt", argv[c]) == 0)
-                        strcpy(argv[c], "-w");
-                else if (strcmp("-ct", argv[c]) == 0)
-                        strcpy(argv[c], "-c");
+        for (int i = 1; i < argc; i++) {
+                if (strcmp("-to", argv[i]) == 0)
+                        strcpy(argv[i], "-t");
+                else if (strcmp("-wt", argv[i]) == 0)
+                        strcpy(argv[i], "-w");
+                else if (strcmp("-ct", argv[i]) == 0)
+                        strcpy(argv[i], "-c");
         }
 
+        int option_char;
+        int option = 0;
         while (1) {
-                c = getopt_long(argc, argv, "hVF:e:a:v:c:w:l:u:", longopts, &option);
+                option_char = getopt_long(argc, argv, "hVF:e:a:v:c:w:l:u:", longopts, &option);
 
-                if (c == -1 || c == EOF)
+                if (option_char == -1 || option_char == EOF)
                         break;
 
-                switch (c) {
+                switch (option_char) {
                 case 'F': /* input file */
                         log_file = optarg;
                         break;
@@ -221,48 +216,48 @@ int process_arguments(int argc, char **argv) {
                 }
         }
 
-        c = optind;
-        if (log_file == NULL && argc > c) {
-                log_file = argv[c++];
+        option_char = optind;
+        if (log_file == NULL && argc > option_char) {
+                log_file = argv[option_char++];
         }
 
-        if (expire_minutes <= 0 && argc > c) {
-                if (is_intpos(argv[c]))
-                        expire_minutes = atoi(argv[c++]);
+        if (expire_minutes <= 0 && argc > option_char) {
+                if (is_intpos(argv[option_char]))
+                        expire_minutes = atoi(argv[option_char++]);
                 else
-                        die(STATE_UNKNOWN, _("%s is not a valid expiration time\nUse '%s -h' for additional help\n"), argv[c], progname);
+                        die(STATE_UNKNOWN, _("%s is not a valid expiration time\nUse '%s -h' for additional help\n"), argv[option_char], progname);
         }
 
-        if (argc > c && strcmp(argv[c], "MAX") == 0) {
+        if (argc > option_char && strcmp(argv[option_char], "MAX") == 0) {
                 use_average = false;
-                c++;
-        } else if (argc > c && strcmp(argv[c], "AVG") == 0) {
+                option_char++;
+        } else if (argc > option_char && strcmp(argv[option_char], "AVG") == 0) {
                 use_average = true;
-                c++;
+                option_char++;
         }
 
-        if (argc > c && variable_number == -1) {
-                variable_number = atoi(argv[c++]);
+        if (argc > option_char && variable_number == -1) {
+                variable_number = atoi(argv[option_char++]);
                 if (variable_number < 1 || variable_number > 2) {
-                        printf("%s :", argv[c]);
+                        printf("%s :", argv[option_char]);
                         usage(_("Invalid variable number\n"));
                 }
         }
 
-        if (argc > c && value_warning_threshold == 0) {
-                value_warning_threshold = strtoul(argv[c++], NULL, 10);
+        if (argc > option_char && value_warning_threshold == 0) {
+                value_warning_threshold = strtoul(argv[option_char++], NULL, 10);
         }
 
-        if (argc > c && value_critical_threshold == 0) {
-                value_critical_threshold = strtoul(argv[c++], NULL, 10);
+        if (argc > option_char && value_critical_threshold == 0) {
+                value_critical_threshold = strtoul(argv[option_char++], NULL, 10);
         }
 
-        if (argc > c && strlen(label) == 0) {
-                label = argv[c++];
+        if (argc > option_char && strlen(label) == 0) {
+                label = argv[option_char++];
         }
 
-        if (argc > c && strlen(units) == 0) {
-                units = argv[c++];
+        if (argc > option_char && strlen(units) == 0) {
+                units = argv[option_char++];
         }
 
         return validate_arguments();