From 9c495e2aefedca270f49987dc31bff983e614281 Mon Sep 17 00:00:00 2001
From: Christian Kujau <lists@nerdbynature.de>
Date: Mon, 20 Mar 2023 11:35:01 +0100
Subject: check_procs: Implement --exclude-process to exclude specific
 processes.

Signed-off-by: Christian Kujau <lists@nerdbynature.de>

diff --git a/plugins/check_procs.c b/plugins/check_procs.c
index a025ee8..d672dd4 100644
--- a/plugins/check_procs.c
+++ b/plugins/check_procs.c
@@ -70,6 +70,7 @@ int options = 0; /* bitmask of filter criteria to test against */
 #define PCPU 256
 #define ELAPSED 512
 #define EREG_ARGS 1024
+#define EXCLUDE_PROGS 2048
 
 #define KTHREAD_PARENT "kthreadd" /* the parent process of kernel threads:
 							ppid of procs are compared to pid of this proc*/
@@ -93,6 +94,9 @@ int rss;
 float pcpu;
 char *statopts;
 char *prog;
+char *exclude_progs;
+char **exclude_progs_arr = NULL;
+char exclude_progs_counter = 0;
 char *args;
 char *input_filename = NULL;
 regex_t re_args;
@@ -250,6 +254,25 @@ main (int argc, char **argv)
 				continue;
 			}
 
+			/* Ignore excluded processes by name */
+			if(options & EXCLUDE_PROGS) {
+			  int found = 0;
+			  int i = 0;
+
+			  for(i=0; i < (exclude_progs_counter); i++) {
+			    if(!strcmp(procprog, exclude_progs_arr[i])) {
+			      found = 1;
+			    }
+			  }
+			  if(found == 0) {
+			    resultsum |= EXCLUDE_PROGS;
+			  } else
+			  {
+			    if(verbose >= 3)
+			      printf("excluding - by ignorelist\n");
+			  }
+			}
+
 			/* filter kernel threads (childs of KTHREAD_PARENT)*/
 			/* TODO adapt for other OSes than GNU/Linux
 					sorry for not doing that, but I've no other OSes to test :-( */
@@ -409,6 +432,7 @@ process_arguments (int argc, char **argv)
 		{"input-file", required_argument, 0, CHAR_MAX+2},
 		{"no-kthreads", required_argument, 0, 'k'},
 		{"traditional-filter", no_argument, 0, 'T'},
+		{"exclude-process", required_argument, 0, 'X'},
 		{0, 0, 0, 0}
 	};
 
@@ -417,7 +441,7 @@ process_arguments (int argc, char **argv)
 			strcpy (argv[c], "-t");
 
 	while (1) {
-		c = getopt_long (argc, argv, "Vvhkt:c:w:p:s:u:C:a:z:r:m:P:T",
+		c = getopt_long (argc, argv, "Vvhkt:c:w:p:s:u:C:a:z:r:m:P:T:X:",
 			longopts, &option);
 
 		if (c == -1 || c == EOF)
@@ -490,6 +514,23 @@ process_arguments (int argc, char **argv)
 			          prog);
 			options |= PROG;
 			break;
+		case 'X':
+			if(exclude_progs)
+			  break;
+			else
+			  exclude_progs = optarg;
+			xasprintf (&fmt, _("%s%sexclude progs '%s'"), (fmt ? fmt : ""), (options ? ", " : ""),
+				   exclude_progs);
+			char *p = strtok(exclude_progs, ",");
+
+			while(p){
+			  exclude_progs_arr = realloc(exclude_progs_arr, sizeof(char*) * ++exclude_progs_counter);
+			  exclude_progs_arr[exclude_progs_counter-1] = p;
+			  p = strtok(NULL, ",");
+			}
+
+			options |= EXCLUDE_PROGS;
+			break;
 		case 'a':									/* args (full path name with args) */
 			/* TODO: allow this to be passed in with --metric */
 			if (args)
@@ -745,6 +786,8 @@ print_help (void)
   printf ("   %s\n", _("Only scan for processes with args that contain the regex STRING."));
   printf (" %s\n", "-C, --command=COMMAND");
   printf ("   %s\n", _("Only scan for exact matches of COMMAND (without path)."));
+  printf (" %s\n", "-X, --exclude-process");
+  printf ("   %s\n", _("Exclude processes which match this comma seperated list"));
   printf (" %s\n", "-k, --no-kthreads");
   printf ("   %s\n", _("Only scan for non kernel threads (works on Linux only)."));
 
@@ -786,5 +829,5 @@ print_usage (void)
   printf ("%s\n", _("Usage:"));
 	printf ("%s -w <range> -c <range> [-m metric] [-s state] [-p ppid]\n", progname);
   printf (" [-u user] [-r rss] [-z vsz] [-P %%cpu] [-a argument-array]\n");
-  printf (" [-C command] [-k] [-t timeout] [-v]\n");
+  printf (" [-C command] [-X process_to_exclude] [-k] [-t timeout] [-v]\n");
 }
-- 
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