bugfixes to check_load thanks to andreas

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1186 f882894a-f735-0410-b71e-b25c423dba1c

1 files changed, 98 insertions, 125 deletions

diff --git a/plugins/check_load.c b/plugins/check_load.c
index 7e1cc48..9625036 100644
--- a/plugins/check_load.c
+++ b/plugins/check_load.c
@@ -39,37 +39,64 @@ const char *email = "nagiosplug-devel@lists.sourceforge.net";
 #endif /* !defined LOADAVG_1MIN */
 
 
-int process_arguments (int argc, char **argv);
-int validate_arguments (void);
+static int process_arguments (int argc, char **argv);
+static int validate_arguments (void);
 void print_help (void);
 void print_usage (void);
 
-float wload1 = -1, wload5 = -1, wload15 = -1;
-float cload1 = -1, cload5 = -1, cload15 = -1;
+/* strictly for pretty-print usage in loops */
+static const int nums[3] = { 1, 5, 15 };
+
+/* provide some fairly sane defaults */
+double wload[3] = { 0.0, 0.0, 0.0 };
+double cload[3] = { 0.0, 0.0, 0.0 };
+#define la1 la[0]
+#define la5 la[1]
+#define la15 la[2]
 
 char *status_line;
 
+static void
+get_threshold(char *arg, double *th)
+{
+        size_t i, n;
+        char *str = arg, *p;
+
+        n = strlen(arg);
+        for(i = 0; i < 3; i++) {
+                th[i] = strtod(str, &p);
+                if(p == str) break;
+
+                str = p + 1;
+                if(n <= (size_t)(str - arg)) break;
+        }
+
+        /* empty argument or non-floatish, so warn about it and die */
+        if(!i) usage (_("Warning threshold must be float or float triplet!\n"));
+
+        if(i != 2) {
+                /* one or more numbers were given, so fill array with last
+                 * we got (most likely to NOT produce the least expected result) */
+                for(n = i; n < 3; n++) th[n] = th[i];
+        }
+}
 
 
 int
 main (int argc, char **argv)
 {
-        int result = STATE_UNKNOWN;
-        
-#if HAVE_GETLOADAVG==1
+        int result;
+        int i;
+
         double la[3] = { 0.0, 0.0, 0.0 };       /* NetBSD complains about unitialized arrays */
-#else
-# if HAVE_PROC_LOADAVG==1
-        FILE *fp;
-        char input_buffer[MAX_INPUT_BUFFER];
-        char *tmp_ptr;
-# else
+#ifndef HAVE_GETLOADAVG
         char input_buffer[MAX_INPUT_BUFFER];
+# ifdef HAVE_PROC_LOADAVG
+        FILE *fp;
+        char *str, *next;
 # endif
 #endif
 
-        float la1, la5, la15;
-
         setlocale (LC_ALL, "");
         bindtextdomain (PACKAGE, LOCALEDIR);
         textdomain (PACKAGE);
@@ -77,30 +104,24 @@ main (int argc, char **argv)
         if (process_arguments (argc, argv) == ERROR)
                 usage4 (_("Could not parse arguments"));
 
-#if HAVE_GETLOADAVG==1
+#ifdef HAVE_GETLOADAVG
         result = getloadavg (la, 3);
-        if (result == -1)
+        if (result != 3)
                 return STATE_UNKNOWN;
-        la1 = la[LOADAVG_1MIN];
-        la5 = la[LOADAVG_5MIN];
-        la15 = la[LOADAVG_15MIN];
 #else
-# if HAVE_PROC_LOADAVG==1
+# ifdef HAVE_PROC_LOADAVG
         fp = fopen (PROC_LOADAVG, "r");
         if (fp == NULL) {
                 printf (_("Error opening %s\n"), PROC_LOADAVG);
                 return STATE_UNKNOWN;
         }
 
-        la1 = la5 = la15 = -1;
-
         while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
-                tmp_ptr = strtok (input_buffer, " ");
-                la1 = atof (tmp_ptr);
-                tmp_ptr = strtok (NULL, " ");
-                la5 = atof (tmp_ptr);
-                tmp_ptr = strtok (NULL, " ");
-                la15 = atof (tmp_ptr);
+                str = (char *)input_buffer;
+                for(i = 0; i < 3; i++) {
+                        la[i] = strtod(str, &next);
+                        str = next;
+                }
         }
 
         fclose (fp);
@@ -125,12 +146,11 @@ main (int argc, char **argv)
 # endif
 #endif
 
-
-        if ((la1 < 0.0) || (la5 < 0.0) || (la15 < 0.0)) {
-#if HAVE_GETLOADAVG==1
+        if ((la[0] < 0.0) || (la[1] < 0.0) || (la[2] < 0.0)) {
+#ifdef HAVE_GETLOADAVG
                 printf (_("Error in getloadavg()\n"));
 #else
-# if HAVE_PROC_LOADAVG==1
+# ifdef HAVE_PROC_LOADAVG
                 printf (_("Error processing %s\n"), PROC_LOADAVG);
 # else
                 printf (_("Error processing %s\n"), PATH_TO_UPTIME);
@@ -139,29 +159,30 @@ main (int argc, char **argv)
                 return STATE_UNKNOWN;
         }
 
+        /* we got this far, so assume OK until we've measured */
+        result = STATE_OK;
+
         asprintf(&status_line, _("load average: %.2f, %.2f, %.2f"), la1, la5, la15);
 
-        if ((la1 >= cload1) || (la5 >= cload5) || (la15 >= cload15))
-                result = STATE_CRITICAL;
-        else if ((la1 >= wload1) || (la5 >= wload5) || (la15 >= wload15))
-                result = STATE_WARNING;
-        else
-                result = STATE_OK;
-
-        die (result,
-             "%s - %s|%s %s %s\n",
-             state_text (result),
-             status_line,
-             fperfdata ("load1", la1, "", (int)wload1, wload1, (int)cload1, cload1, TRUE, 0, FALSE, 0),
-             fperfdata ("load5", la5, "", (int)wload5, wload5, (int)cload5, cload5, TRUE, 0, FALSE, 0),
-             fperfdata ("load15", la15, "", (int)wload15, wload15, (int)cload15, cload15, TRUE, 0, FALSE, 0));
-        return STATE_OK;
-}
+        for(i = 0; i < 3; i++) {
+                if(la[i] > cload[i]) {
+                        result = STATE_CRITICAL;
+                        break;
+                }
+                else if(la[i] > wload[i]) result = STATE_WARNING;
+        }
+
+        printf("%s - %s|", state_text(result), status_line);
+        for(i = 0; i < 3; i++)
+                printf("load%d=%.3f;%.3f;%.3f;0; ", nums[i], la[i], wload[i], cload[i]);
 
+        putchar('\n');
+        return result;
+}
 
 
 /* process command-line arguments */
-int
+static int
 process_arguments (int argc, char **argv)
 {
         int c = 0;
@@ -185,37 +206,11 @@ process_arguments (int argc, char **argv)
                         break;
 
                 switch (c) {
-                case 'w':                                                                       /* warning time threshold */
-                        if (is_intnonneg (optarg)) {
-                                wload1 = atof (optarg);
-                                wload5 = atof (optarg);
-                                wload15 = atof (optarg);
-                                break;
-                        }
-                        else if (strstr (optarg, ",") &&
-                                                                 sscanf (optarg, "%f,%f,%f", &wload1, &wload5, &wload15) == 3)
-                                break;
-                        else if (strstr (optarg, ":") &&
-                                                         sscanf (optarg, "%f:%f:%f", &wload1, &wload5, &wload15) == 3)
-                                break;
-                        else
-                                usage (_("Warning threshold must be float or float triplet!\n"));
+                case 'w': /* warning time threshold */
+                        get_threshold(optarg, wload);
                         break;
-                case 'c':                                                                       /* critical time threshold */
-                        if (is_intnonneg (optarg)) {
-                                cload1 = atof (optarg);
-                                cload5 = atof (optarg);
-                                cload15 = atof (optarg);
-                                break;
-                        }
-                        else if (strstr (optarg, ",") &&
-                                                         sscanf (optarg, "%f,%f,%f", &cload1, &cload5, &cload15) == 3)
-                                break;
-                        else if (strstr (optarg, ":") &&
-                                                         sscanf (optarg, "%f:%f:%f", &cload1, &cload5, &cload15) == 3)
-                                break;
-                        else
-                                usage (_("Critical threshold must be float or float triplet!\n"));
+                case 'c': /* critical time threshold */
+                        get_threshold(optarg, cload);
                         break;
                 case 'V':                                                                       /* version */
                         print_revision (progname, revision);
@@ -231,60 +226,38 @@ process_arguments (int argc, char **argv)
         c = optind;
         if (c == argc)
                 return validate_arguments ();
-        if (wload1 < 0 && is_nonnegative (argv[c]))
-                wload1 = atof (argv[c++]);
-
-        if (c == argc)
-                return validate_arguments ();
-        if (cload1 < 0 && is_nonnegative (argv[c]))
-                cload1 = atof (argv[c++]);
-
-        if (c == argc)
-                return validate_arguments ();
-        if (wload5 < 0 && is_nonnegative (argv[c]))
-                wload5 = atof (argv[c++]);
 
-        if (c == argc)
-                return validate_arguments ();
-        if (cload5 < 0 && is_nonnegative (argv[c]))
-                cload5 = atof (argv[c++]);
-
-        if (c == argc)
-                return validate_arguments ();
-        if (wload15 < 0 && is_nonnegative (argv[c]))
-                wload15 = atof (argv[c++]);
-
-        if (c == argc)
-                return validate_arguments ();
-        if (cload15 < 0 && is_nonnegative (argv[c]))
-                cload15 = atof (argv[c++]);
+        /* handle the case if both arguments are missing,
+         * but not if only one is given without -c or -w flag */
+        if(c - argc == 2) {
+                get_threshold(argv[c++], wload);
+                get_threshold(argv[c++], cload);
+        }
+        else if(c - argc == 1) {
+                get_threshold(argv[c++], cload);
+        }
 
         return validate_arguments ();
 }
 
 
 
-int
+static int
 validate_arguments (void)
 {
-        if (wload1 < 0)
-                usage (_("Warning threshold for 1-minute load average is not specified\n"));
-        if (wload5 < 0)
-                usage (_("Warning threshold for 5-minute load average is not specified\n"));
-        if (wload15 < 0)
-                usage (_("Warning threshold for 15-minute load average is not specified\n"));
-        if (cload1 < 0)
-                usage (_("Critical threshold for 1-minute load average is not specified\n"));
-        if (cload5 < 0)
-                usage (_("Critical threshold for 5-minute load average is not specified\n"));
-        if (cload15 < 0)
-                usage (_("Critical threshold for 15-minute load average is not specified\n"));
-        if (wload1 > cload1)
-                usage (_("Parameter inconsistency: 1-minute \"warning load\" greater than \"critical load\".\n"));
-        if (wload5 > cload5)
-                usage (_("Parameter inconsistency: 5-minute \"warning load\" greater than \"critical load\".\n"));
-        if (wload15 > cload15)
-                usage (_("Parameter inconsistency: 15-minute \"warning load\" greater than \"critical load\".\n"));
+        int i = 0;
+
+        /* match cload first, as it will give the most friendly error message
+         * if user hasn't given the -c switch properly */
+        for(i = 0; i < 3; i++) {
+                if(cload[i] < 0)
+                        die (STATE_UNKNOWN, _("Critical threshold for %d-minute load average is not specified\n"), nums[i]);
+                if(wload[i] < 0)
+                        die (STATE_UNKNOWN, _("Warning threshold for %d-minute load average is not specified\n"), nums[i]);
+                if(wload[i] > cload[i])
+                        die (STATE_UNKNOWN, _("Parameter inconsistency: %d-minute \"warning load\" is greater than \"critical load\"\n"), nums[i]);
+        }
+
         return OK;
 }