2 files changed, 16 insertions, 2 deletions

diff --git a/NEWS b/NEWS
index 3a91d75..3ed9967 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,7 @@ This file documents the major additions and syntax changes between releases.
         ENHANCEMENTS
         check_ide_smart now defaults to plugin output, original output appended with -v
         Extra-Opts are now enabled by default
+        check_swap now supports a configurable state when there is no swap
 
         FIXES
         Don't let e.g. check_http's -C option reset SSL version if e.g. -S 1 -C 5 is specified
@@ -20,6 +21,8 @@ This file documents the major additions and syntax changes between releases.
           been disabled because they were broken
         State retention: the NAGIOS_PLUGIN_STATE_DIRECTORY environment variable has been
           renamed MP_STATE_DIRECTORY. The old variable will continue to work in v1.6.x
+        check_swap used to allow returning OK on a system without swap when only percent thresholds
+          were used. This is no longer the case and one must now use -n/--no-swap=<state>
 
 1.5 2nd October 2013
         ENHANCEMENTS
diff --git a/plugins/check_swap.c b/plugins/check_swap.c
index 04256ad..d8fc14f 100644
--- a/plugins/check_swap.c
+++ b/plugins/check_swap.c
@@ -60,9 +60,10 @@ void print_help (void);
 int warn_percent = 0;
 int crit_percent = 0;
 float warn_size_bytes = 0;
-float crit_size_bytes= 0;
+float crit_size_bytes = 0;
 int verbose;
 int allswaps;
+int no_swap_state = STATE_CRITICAL;
 
 int
 main (int argc, char **argv)
@@ -372,6 +373,9 @@ main (int argc, char **argv)
 int
 check_swap (int usp, float free_swap_mb)
 {
+
+        if (!free_swap_mb) return no_swap_state;
+
         int result = STATE_UNKNOWN;
         float free_swap = free_swap_mb * (1024 * 1024);         /* Convert back to bytes as warn and crit specified in bytes */
         if (usp >= 0 && crit_percent != 0 && usp >= (100.0 - crit_percent))
@@ -400,6 +404,7 @@ process_arguments (int argc, char **argv)
                 {"warning", required_argument, 0, 'w'},
                 {"critical", required_argument, 0, 'c'},
                 {"allswaps", no_argument, 0, 'a'},
+                {"no-swap", required_argument, 0, 'n'},
                 {"verbose", no_argument, 0, 'v'},
                 {"version", no_argument, 0, 'V'},
                 {"help", no_argument, 0, 'h'},
@@ -410,7 +415,7 @@ process_arguments (int argc, char **argv)
                 return ERROR;
 
         while (1) {
-                c = getopt_long (argc, argv, "+?Vvhac:w:", longopts, &option);
+                c = getopt_long (argc, argv, "+?Vvhac:w:n:", longopts, &option);
 
                 if (c == -1 || c == EOF)
                         break;
@@ -455,6 +460,10 @@ process_arguments (int argc, char **argv)
                 case 'a':                                                                       /* all swap */
                         allswaps = TRUE;
                         break;
+                case 'n':
+                        if ((no_swap_state = mp_translate_state(optarg)) == ERROR) {
+                                usage4 (_("no-swap result must be a valid state name (OK, WARNING, CRITICAL, UNKNOWN) or integer (0-3)."));
+                        }
                 case 'v':                                                                       /* verbose */
                         verbose++;
                         break;
@@ -541,6 +550,8 @@ print_help (void)
   printf ("    %s\n", _("Exit with CRITCAL status if less than PERCENT of swap space is free"));
   printf (" %s\n", "-a, --allswaps");
   printf ("    %s\n", _("Conduct comparisons for all swap partitions, one by one"));
+  printf (" %s\n", "-n, --no-swap=<ok|warning|critical|unknown>");
+  printf ("    %s %s\n", _("Resulting state when there is no swap regardless of thresholds. Default:"), state_text(no_swap_state));
         printf (UT_VERBOSE);
 
         printf ("\n");