D20970.id59812.diff
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	Index: head/share/man/man5/core.5
	===================================================================
	--- head/share/man/man5/core.5
	+++ head/share/man/man5/core.5
	@@ -82,6 +82,8 @@
	process name.
	.It Em \&%P
	processes PID.
	+.It Em \&%S
	+signal during core.
	.It Em \&%U
	process UID.
	.El
	Index: head/sys/kern/kern_sig.c
	===================================================================
	--- head/sys/kern/kern_sig.c
	+++ head/sys/kern/kern_sig.c
	@@ -3433,7 +3433,7 @@
	*/
	static int
	corefile_open(const char comm, uid_t uid, pid_t pid, struct thread td,
	- int compress, struct vnode vpp, char namep)
	+ int compress, int signum, struct vnode vpp, char namep)
	{
	struct sbuf sb;
	struct nameidata nd;
	@@ -3482,6 +3482,9 @@
	case 'P': /* process id */
	sbuf_printf(&sb, "%u", pid);
	break;
	+ case 'S': /* signal number */
	+ sbuf_printf(&sb, "%i", signum);
	+ break;
	case 'U': /* user id */
	sbuf_printf(&sb, "%u", uid);
	break;
	@@ -3599,7 +3602,7 @@
	PROC_UNLOCK(p);

	error = corefile_open(p->p_comm, cred->cr_uid, p->p_pid, td,
	- compress_user_cores, &vp, &name);
	+ compress_user_cores, p->p_sig, &vp, &name);
	if (error != 0)
	return (error);