--- plugins/check_procs.c.orig	2022-10-19 12:50:27 UTC
+++ plugins/check_procs.c
@@ -70,6 +70,7 @@ int options = 0; /* bitmask of filter criteria to test
 #define PCPU 256
 #define ELAPSED 512
 #define EREG_ARGS 1024
+#define JID 2048
 
 #define KTHREAD_PARENT "kthreadd" /* the parent process of kernel threads:
 							ppid of procs are compared to pid of this proc*/
@@ -101,6 +102,7 @@ int usepid = 0; /* whether to test for pid or /proc/pi
 char tmp[MAX_INPUT_BUFFER];
 int kthread_filter = 0;
 int usepid = 0; /* whether to test for pid or /proc/pid/exe */
+int jid;
 
 FILE *ps_input = NULL;
 
@@ -130,6 +132,7 @@ main (int argc, char **argv)
 	int procuid = 0;
 	pid_t procpid = 0;
 	pid_t procppid = 0;
+    int procjid = 0;
 	pid_t kthread_ppid = 0;
 	int procvsz = 0;
 	int procrss = 0;
@@ -230,9 +233,9 @@ main (int argc, char **argv)
 			procseconds = convert_to_seconds(procetime);
 
 			if (verbose >= 3)
-				printf ("proc#=%d uid=%d vsz=%d rss=%d pid=%d ppid=%d pcpu=%.2f stat=%s etime=%s prog=%s args=%s\n",
+				printf ("proc#=%d uid=%d vsz=%d rss=%d pid=%d ppid=%d jid=%d pcpu=%.2f stat=%s etime=%s prog=%s args=%s\n",
 					procs, procuid, procvsz, procrss,
-					procpid, procppid, procpcpu, procstat,
+					procpid, procppid, procjid, procpcpu, procstat,
 					procetime, procprog, procargs);
 
 			/* Ignore self */
@@ -275,6 +278,8 @@ main (int argc, char **argv)
 				resultsum |= PROG;
 			if ((options & PPID) && (procppid == ppid))
 				resultsum |= PPID;
+            if ((options & JID) && (procjid == jid))
+                resultsum |= JID;
 			if ((options & USER) && (procuid == uid))
 				resultsum |= USER;
 			if ((options & VSZ)  && (procvsz >= vsz))
@@ -292,9 +297,9 @@ main (int argc, char **argv)
 
 			procs++;
 			if (verbose >= 2) {
-				printf ("Matched: uid=%d vsz=%d rss=%d pid=%d ppid=%d pcpu=%.2f stat=%s etime=%s prog=%s args=%s\n",
+				printf ("Matched: uid=%d vsz=%d rss=%d pid=%d ppid=%d jid=%d pcpu=%.2f stat=%s etime=%s prog=%s args=%s\n",
 					procuid, procvsz, procrss,
-					procpid, procppid, procpcpu, procstat,
+					procpid, procppid, procjid, procpcpu, procstat,
 					procetime, procprog, procargs);
 			}
 
@@ -409,6 +414,7 @@ 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'},
+		{"jid", required_argument, 0, 'j'},
 		{0, 0, 0, 0}
 	};
 
@@ -417,7 +423,7 @@ 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:Tj:",
 			longopts, &option);
 
 		if (c == -1 || c == EOF)
@@ -451,6 +457,12 @@ process_arguments (int argc, char **argv)
 				break;
 			}
 			usage4 (_("Parent Process ID must be an integer!"));
+        case 'j':                                   /* jail id */
+            if (sscanf (optarg, "%d%[^0-9]", &jid, tmp) == 1) {
+                asprintf (&fmt, "%s%sJID = %d", (fmt ? fmt : "") , (options ? ", " : ""), jid);
+                options |= JID;
+                break;
+            }
 		case 's':									/* status */
 			if (statopts)
 				break;
@@ -731,6 +743,8 @@ print_help (void)
   printf ("   %s\n", _("RSZDT, plus others based on the output of your 'ps' command)."));
   printf (" %s\n", "-p, --ppid=PPID");
   printf ("   %s\n", _("Only scan for children of the parent process ID indicated."));
+  printf (" %s\n", "-j, --jid=JID");
+  printf ("   %s\n", _("Only scan for process running in jail which ID is JID."));
   printf (" %s\n", "-z, --vsz=VSZ");
   printf ("   %s\n", _("Only scan for processes with VSZ higher than indicated."));
   printf (" %s\n", "-r, --rss=RSS");
@@ -784,7 +798,7 @@ print_usage (void)
 print_usage (void)
 {
   printf ("%s\n", _("Usage:"));
-	printf ("%s -w <range> -c <range> [-m metric] [-s state] [-p ppid]\n", progname);
+	printf ("%s -w <range> -c <range> [-m metric] [-s state] [-p ppid] [-j jid]\n", progname);
   printf (" [-u user] [-r rss] [-z vsz] [-P %%cpu] [-a argument-array]\n");
   printf (" [-C command] [-k] [-t timeout] [-v]\n");
 }