check_disk: Fail on missing arguments for --warning and --critical and fix a test case (#1935)

* check_disk: Fail on missing arguments for --warning and --critical
* Add new test function for percentage expressions and use it in check_disk
* Add error abort in tests if they fail to parse output
* Fix typo in test which probably broke the test since forever :-(

1 files changed, 30 insertions, 1 deletions

diff --git a/plugins/utils.c b/plugins/utils.c
index aff1790..77d6a6f 100644
--- a/plugins/utils.c
+++ b/plugins/utils.c
@@ -23,13 +23,15 @@
 *****************************************************************************/
 
 #include "common.h"
-#include "utils.h"
+#include "./utils.h"
 #include "utils_base.h"
 #include <stdarg.h>
 #include <limits.h>
 #include <string.h>
 #include <errno.h>
 
+#include <stdbool.h>
+
 #include <arpa/inet.h>
 
 extern void print_usage (void);
@@ -188,6 +190,33 @@ bool is_percentage (char *number) {
                 return false;
 }
 
+bool is_percentage_expression (const char str[]) {
+        if (!str) {
+                return false;
+        }
+
+        size_t len = strlen(str);
+
+        if (str[len-1] != '%') {
+                return false;
+        }
+
+        char *foo = calloc(sizeof(char), len + 1);
+
+        if (!foo) {
+                die (STATE_UNKNOWN, _("calloc failed \n"));
+        }
+
+        strcpy(foo, str);
+        foo[len-1] = '\0';
+
+        bool result = is_numeric(foo);
+
+        free(foo);
+
+        return result;
+}
+
 bool is_integer (char *number) {
         long int n;