diff -ru lib/libutil.orig/login.conf.5 lib/libutil/login.conf.5
--- lib/libutil.orig/login.conf.5	2004-04-22 13:52:55.000000000 -0300
+++ lib/libutil/login.conf.5	2004-09-12 16:30:16.000000000 -0300
@@ -167,6 +167,7 @@
 .It "vmemoryuse	size		Maximum permitted total VM useage per process.
 .It "stacksize	size		Maximum stack size limit.
 .It "posixlocks size            Maximum number of POSIX-type advisory-mode locks.
+.It "forkdepth number          Maximum depth of the process tree having the current process as its root.
 .El
 .Pp
 These resource limit entries actually specify both the maximum
diff -ru lib/libutil.orig/login_class.c lib/libutil/login_class.c
--- lib/libutil.orig/login_class.c	2004-04-22 13:52:55.000000000 -0300
+++ lib/libutil/login_class.c	2004-09-12 16:31:33.000000000 -0300
@@ -61,6 +61,7 @@
 #ifdef RLIMIT_POSIXLOCKS
     { "posixlocks",	login_getcapnum,	RLIMIT_POSIXLOCKS },
 #endif
+    { "forkdepth",	login_getcapnum,	RLIMIT_FORK	},
     { NULL,		0,			0		}
 };