1 files changed, 15 insertions, 5 deletions

diff --git a/plugins/check_procs.c b/plugins/check_procs.c
index 05318b6..755ed86 100644
--- a/plugins/check_procs.c
+++ b/plugins/check_procs.c
@@ -77,6 +77,7 @@ char *prog = "";
 char *args = "";
 char *fmt = "";
 char tmp[MAX_INPUT_BUFFER];
+const char *zombie = "Z";
 
 int
 main (int argc, char **argv)
@@ -93,6 +94,7 @@ main (int argc, char **argv)
         int found = 0; /* counter for number of lines returned in `ps` output */
         int procs = 0; /* counter for number of processes meeting filter criteria */
         int pos; /* number of spaces before 'args' in `ps` output */
+        int cols; /* number of columns in ps output */
 
         int result = STATE_UNKNOWN;
 
@@ -115,14 +117,18 @@ main (int argc, char **argv)
         fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process);
 
         while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
-                if (
 #ifdef USE_PS_VARS
-                                 sscanf (input_buffer, PS_FORMAT, PS_VARLIST) >= 4
+                cols = sscanf (input_buffer, PS_FORMAT, PS_VARLIST);
 #else
-                                 sscanf (input_buffer, PS_FORMAT, procstat, &procuid, &procppid, &pos,
-                                                                 procprog) >= 4
+                cols = sscanf (input_buffer, PS_FORMAT, procstat, &procuid, 
+                                                        &procppid, &pos, procprog);
 #endif
-                        ) {
+                /* Zombie processes do not give a procprog command */
+                if ( cols == 3 && strstr(procstat, zombie) ) {
+                        strcpy(procprog, "");
+                        cols = 4;
+                }
+                if ( cols >= 4 ) {
                         found++;
                         resultsum = 0;
                         asprintf (&procargs, "%s", input_buffer + pos);
@@ -147,6 +153,10 @@ main (int argc, char **argv)
 #endif
                         if (options == resultsum)
                                 procs++;
+                } 
+                /* This should not happen */
+                else if (verbose) {
+                        printf("Not parseable: %s", input_buffer);
                 }
         }