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Index: sys/kern/kern_fork.c
===================================================================
--- sys/kern/kern_fork.c
+++ sys/kern/kern_fork.c
@@ -210,8 +210,13 @@
if (error == 0 && req->newptr != NULL) {
if (pid < 0 || pid > pid_max - 100) /* out of range */
pid = pid_max - 100;
- else if (pid < 2) /* NOP */
- pid = 0;
+ else if (pid == 1) {
+ /*
+ * Generate a random PID modulus, range: 100 to 999)
+ * arc4random() % (max_num + 1 - min_num) + min_num
+ */
+ pid = abs((int)arc4random()) % (999 + 1 - 100) + 100;
+ }
else if (pid < 100) /* Make it reasonable */
pid = 100;
randompid = pid;
@@ -221,7 +226,7 @@
}
SYSCTL_PROC(_kern, OID_AUTO, randompid, CTLTYPE_INT|CTLFLAG_RW,
- 0, 0, sysctl_kern_randompid, "I", "Random PID modulus");
+ 0, 0, sysctl_kern_randompid, "I", "Random PID modulus. Special values: 0: disable, 1: choose random value");
static int
fork_findpid(int flags)

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