From a46e358d68027289cffaffeb7a4b32ababb2105b Mon Sep 17 00:00:00 2001
From: Ton Voon <tonvoon@users.sourceforge.net>
Date: Wed, 12 Jul 2006 22:53:27 +0000
Subject: Added -E option for exact match of filesystem. Restructured main
 filesystem loop. Added extra tests for possible duplicate filesystems.

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1449 f882894a-f735-0410-b71e-b25c423dba1c

diff --git a/plugins/check_disk.c b/plugins/check_disk.c
index 8e9c1fc..1423448 100644
--- a/plugins/check_disk.c
+++ b/plugins/check_disk.c
@@ -119,7 +119,6 @@ int process_arguments (int, char **);
 void print_path (const char *mypath);
 int validate_arguments (uintmax_t, uintmax_t, double, double, double, double, char *);
 int check_disk (double usp, uintmax_t free_disk, double uisp);
-int walk_parameter_list (struct parameter_list *list, const char *name);
 void print_help (void);
 void print_usage (void);
 
@@ -136,7 +135,7 @@ uintmax_t mult = 1024 * 1024;
 int verbose = 0;
 int erronly = FALSE;
 int display_mntp = FALSE;
-
+int exact_match = FALSE;
 
 
 int
@@ -154,7 +153,8 @@ main (int argc, char **argv)
 
   struct mount_entry *me;
   struct fs_usage fsp;
-  struct parameter_list *temp_list;
+  struct parameter_list *temp_list, *path;
+  struct name_list *seen = NULL;
 
   output = strdup (" - free space:");
   details = strdup ("");
@@ -169,57 +169,69 @@ main (int argc, char **argv)
   if (process_arguments (argc, argv) == ERROR)
     usage4 (_("Could not parse arguments"));
 
-  /* if a list of paths has been selected, preseed the list with
-   * the longest matching filesystem name by iterating across
-   * the mountlist once ahead of time.  this will allow a query on
-   * "/var/log" to return information about "/var" if no "/var/log"
-   * filesystem exists, etc.  this is the default behavior already
-   * with df-based checks, but for systems with their own space
-   * checking routines, this should make them more consistent.
+  /* If a list of paths has not been selected, find entire
+     mount list and create list of paths
    */
-  if(path_select_list){
+  if (! path_select_list) {
     for (me = mount_list; me; me = me->me_next) {
-      walk_parameter_list(path_select_list, me->me_mountdir);
-      walk_parameter_list(path_select_list, me->me_devname);
+      path = np_add_parameter(&path_select_list, me->me_mountdir);
+      path->w_df = w_df;
+      path->c_df = c_df;
+      path->w_dfp = w_dfp;
+      path->c_dfp = c_dfp;
+      path->w_idfp = w_idfp;
+      path->c_idfp = c_idfp;
+      path->best_match = me;
     }
-    /* now pretend we never saw anything, but keep found_len.
-     * thus future searches will only match the best match */
-    for (temp_list = path_select_list; temp_list; temp_list=temp_list->name_next){
-      temp_list->found=0;
+  } else {
+    np_set_best_match(path_select_list, mount_list, exact_match);
+
+    /* Error if no match found for specified paths */
+    temp_list = path_select_list;
+    while (temp_list) {
+      if (! temp_list->best_match) {
+        die (STATE_CRITICAL, _("DISK %s: %s not found\n"), _("CRITICAL"), temp_list->name);
+      }
+      temp_list = temp_list->name_next;
     }
   }
 
-  /* for every mount entry */
-  for (me = mount_list; me; me = me->me_next) {
-    /* if there's a list of paths to select, the current mount
-     * entry matches in path or device name, get fs usage */
-    if (path_select_list &&
-         (walk_parameter_list (path_select_list, me->me_mountdir) ||
-          walk_parameter_list (path_select_list, me->me_devname) ) ) {
-      get_fs_usage (me->me_mountdir, me->me_devname, &fsp);
-    /* else if there's a list of paths/devices to select (but
-     * we didn't match above) skip to the next mount entry */
-    } else if (path_select_list) {
+  /* Process for every path in list */
+  for (path = path_select_list; path; path=path->name_next) {
+    me = path->best_match;
+    w_df = path->w_df;
+    c_df = path->c_df;
+    w_dfp = path->w_dfp;
+    c_dfp = path->c_dfp;
+    w_idfp = path->w_idfp;
+    c_idfp = path->c_idfp;
+
+    /* Filters */
+
+    /* Remove filesystems already seen */
+    if (np_seen_name(seen, me->me_mountdir)) {
       continue;
-    /* skip remote filesystems if we're not interested in them */
-    } else if (me->me_remote && show_local_fs) {
+    } else {
+      np_add_name(&seen, me->me_mountdir);
+    }
+    /* Skip remote filesystems if we're not interested in them */
+    if (me->me_remote && show_local_fs) {
       continue;
-    /* skip pseudo fs's if we haven't asked for all fs's */
+    /* Skip pseudo fs's if we haven't asked for all fs's */
     } else if (me->me_dummy && !show_all_fs) {
       continue;
-    /* skip excluded fstypes */
+    /* Skip excluded fstypes */
     } else if (fs_exclude_list && np_find_name (fs_exclude_list, me->me_type)) {
       continue;
-    /* skip excluded fs's */  
+    /* Skip excluded fs's */  
     } else if (dp_exclude_list && 
              (np_find_name (dp_exclude_list, me->me_devname) ||
               np_find_name (dp_exclude_list, me->me_mountdir))) {
       continue;
-    /* otherwise, get fs usage */
-    } else {
-      get_fs_usage (me->me_mountdir, me->me_devname, &fsp);
     }
 
+    get_fs_usage (me->me_mountdir, me->me_devname, &fsp);
+
     if (fsp.fsu_blocks && strcmp ("none", me->me_mountdir)) {
       usp = (double)(fsp.fsu_blocks - fsp.fsu_bavail) * 100 / fsp.fsu_blocks;
                         uisp = (double)(fsp.fsu_files - fsp.fsu_ffree) * 100 / fsp.fsu_files;
@@ -271,15 +283,6 @@ main (int argc, char **argv)
   if (verbose > 2)
     asprintf (&output, "%s%s", output, details);
 
-  /* Override result if paths specified and not found */
-  temp_list = path_select_list;
-  while (temp_list) {
-    if (!temp_list->found) {
-      asprintf (&output, _("%s [%s not found]"), output, temp_list->name);
-      result = STATE_CRITICAL;
-    }
-    temp_list = temp_list->name_next;
-  }
 
   printf ("DISK %s%s|%s\n", state_text (result), output, perf);
   return result;
@@ -318,6 +321,7 @@ process_arguments (int argc, char **argv)
     {"exclude-type", required_argument, 0, 'X'},
     {"mountpoint", no_argument, 0, 'M'},
     {"errors-only", no_argument, 0, 'e'},
+    {"exact-match", no_argument, 0, 'E'},
     {"verbose", no_argument, 0, 'v'},
     {"quiet", no_argument, 0, 'q'},
     {"clear", no_argument, 0, 'C'},
@@ -336,7 +340,7 @@ process_arguments (int argc, char **argv)
       strcpy (argv[c], "-t");
 
   while (1) {
-    c = getopt_long (argc, argv, "+?VqhveCt:c:w:K:W:u:p:x:X:mklM", longopts, &option);
+    c = getopt_long (argc, argv, "+?VqhveCt:c:w:K:W:u:p:x:X:mklME", longopts, &option);
 
     if (c == -1 || c == EOF)
       break;
@@ -469,6 +473,9 @@ process_arguments (int argc, char **argv)
     case 'e':
       erronly = TRUE;
       break;
+    case 'E':
+      exact_match = TRUE;
+      break;
     case 'M': /* display mountpoint */
       display_mntp = TRUE;
       break;
@@ -621,30 +628,6 @@ check_disk (double usp, uintmax_t free_disk, double uisp)
 
 
 
-int
-walk_parameter_list (struct parameter_list *list, const char *name)
-{
-  int name_len;
-  name_len = strlen(name);
-  while (list) {
-    /* if the paths match up to the length of the mount path,
-     * AND if the mount path name is longer than the longest
-     * found match, we have a new winner */
-    if (name_len >= list->found_len && 
-        ! strncmp(list->name, name, name_len)) {
-      list->found = 1;
-      list->found_len = name_len;
-      /* if required for parameter_lists that have not saved w_df, etc (eg exclude lists) */
-      if (list->w_df) w_df = list->w_df;
-      if (list->c_df) c_df = list->c_df;
-      if (list->w_dfp>=0.0) w_dfp = list->w_dfp;
-      if (list->c_dfp>=0.0) c_dfp = list->c_dfp;
-      return TRUE;
-    }
-    list = list->name_next;
-  }
-  return FALSE;
-}
 
 
 
@@ -695,6 +678,8 @@ print_help (void)
   printf ("    %s\n", _("Ignore all filesystems of indicated type (may be repeated)"));
   printf (" %s\n", "-m, --mountpoint");
   printf ("    %s\n", _("Display the mountpoint instead of the partition"));
+  printf (" %s\n", "-E, --exact-match");
+  printf ("    %s\n", _("For paths or partitions specified with -p, only check for exact paths"));
   printf (" %s\n", "-e, --errors-only");
   printf ("    %s\n", _("Display only devices/mountpoints with errors"));
   printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
@@ -713,5 +698,5 @@ print_usage (void)
 {
   printf (_("Usage:"));
   printf (" %s -w limit -c limit [-p path | -x device] [-t timeout]", progname);
-  printf ("[-m] [-e] [-W limit] [-K limit] [-v] [-q]\n");
+  printf ("[-m] [-e] [-W limit] [-K limit] [-v] [-q] [-E]\n");
 }
diff --git a/plugins/t/check_disk.t b/plugins/t/check_disk.t
index 14bc8de..70d8415 100644
--- a/plugins/t/check_disk.t
+++ b/plugins/t/check_disk.t
@@ -22,7 +22,7 @@ my $mountpoint2_valid = getTestParameter( "NP_MOUNTPOINT2_VALID", "Path to anoth
 if ($mountpoint_valid eq "" or $mountpoint2_valid eq "") {
 	plan skip_all => "Need 2 mountpoints to test";
 } else {
-	plan tests => 32;
+	plan tests => 35;
 }
 
 $result = NPTest->testCmd( 
@@ -103,6 +103,12 @@ $result = NPTest->testCmd(
 	);
 cmp_ok( $result->return_code, '==', 2, "Combining above two tests, get critical");
 
+$result = NPTest->testCmd(
+	"./check_disk -w $avg_free% -c $avg_free% -p $less_free -w $avg_free% -c 0% -p $more_free"
+	);
+cmp_ok( $result->return_code, '==', 2, "And reversing arguments should not make a difference");
+
+
 
 
 $result = NPTest->testCmd(
@@ -168,6 +174,12 @@ $result = NPTest->testCmd( "./check_disk -w 0% -c 0% -p /etc" );
 cmp_ok( $result->return_code, '==', 0, "Checking /etc - should return info for /" );
 cmp_ok( $result->output, 'eq', $root_output, "check_disk /etc gives same as check_disk /");
 
+$result = NPTest->testCmd( "./check_disk -w 0% -c 0% -p /etc -E" );
+cmp_ok( $result->return_code, '==', 2, "... unless -E/--exact-match is specified");
+
 $result = NPTest->testCmd( "./check_disk -w 0% -c 0% -p / -p /bob" );
 cmp_ok( $result->return_code, '==', 2, "Checking / and /bob gives critical");
 unlike( $result->perf_output, '/\/bob/', "perf data does not have /bob in it");
+
+$result = NPTest->testCmd( "./check_disk -w 0% -c 0% -p / -p /" );
+unlike( $result->output, '/ \/ .* \/ /', "Should not show same filesystem twice");
diff --git a/plugins/utils_disk.c b/plugins/utils_disk.c
index 0a71d79..31284d5 100644
--- a/plugins/utils_disk.c
+++ b/plugins/utils_disk.c
@@ -43,9 +43,11 @@ np_add_name (struct name_list **list, const char *name)
   *list = new_entry;
 }
 
-void
+/* Initialises a new parameter at the end of list */
+struct parameter_list *
 np_add_parameter(struct parameter_list **list, const char *name)
 {
+  struct parameter_list *current = *list;
   struct parameter_list *new_path;
   new_path = (struct parameter_list *) malloc (sizeof *new_path);
   new_path->name = (char *) name;
@@ -57,8 +59,17 @@ np_add_parameter(struct parameter_list **list, const char *name)
   new_path->c_dfp = -1.0;
   new_path->w_idfp = -1.0;
   new_path->c_idfp = -1.0;
-  new_path->name_next = *list;
-  *list = new_path;
+  new_path->best_match = NULL;
+
+  if (current == NULL) {
+    *list = new_path;
+  } else {
+    while (current->name_next) {
+      current = current->name_next;
+    }
+    current->name_next = new_path;
+  }
+  return new_path;
 }
 
 void
@@ -93,6 +104,8 @@ np_set_best_match(struct parameter_list *desired, struct mount_entry *mount_list
     if (best_match) {
       d->best_match = best_match;
       d->found = TRUE;
+    } else {
+      d->best_match = NULL;	/* Not sure why this is needed as it should be null on initialisation */
     }
   }
 }
@@ -114,3 +127,15 @@ np_find_name (struct name_list *list, const char *name)
   return FALSE;
 }
 
+int
+np_seen_name(struct name_list *list, const char *name)
+{
+  const struct name_list *s;
+  for (s = list; s; s=s->next) {
+    if (!strcmp(s->name, name)) {
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+
diff --git a/plugins/utils_disk.h b/plugins/utils_disk.h
index c1919fe..676ca09 100644
--- a/plugins/utils_disk.h
+++ b/plugins/utils_disk.h
@@ -25,5 +25,6 @@ struct parameter_list
 
 void np_add_name (struct name_list **list, const char *name);
 int np_find_name (struct name_list *list, const char *name);
-void np_add_parameter(struct parameter_list **list, const char *name);
+int np_seen_name (struct name_list *list, const char *name);
+struct parameter_list *np_add_parameter(struct parameter_list **list, const char *name);
 int search_parameter_list (struct parameter_list *list, const char *name);
-- 
cgit v0.10-9-g596f

