Let btrace(8) execute the END probe upon receiving a SIGTERM signal

While SIGINT (already handled) makes sense for interactive use, handling
SIGTERM in the same manner is less surprising for scripting.  This lets
you do:

  btrace ... & some workload; kill $!

and get the expected output.

ok mpi@

diff --git a/usr.sbin/btrace/btrace.c b/usr.sbin/btrace/btrace.c
index 5daaab1..1292f71 100644 (file)
--- a/usr.sbin/btrace/btrace.c
+++ b/usr.sbin/btrace/btrace.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: btrace.c,v 1.62 2022/02/22 17:26:04 deraadt Exp $ */
+/*     $OpenBSD: btrace.c,v 1.63 2022/06/02 21:38:46 jca Exp $ */
 
 /*
  * Copyright (c) 2019 - 2021 Martin Pieuchot <mpi@openbsd.org>
@@ -385,6 +385,8 @@ rules_do(int fd)
        sa.sa_handler = signal_handler;
        if (sigaction(SIGINT, &sa, NULL))
                err(1, "sigaction");
+       if (sigaction(SIGTERM, &sa, NULL))
+               err(1, "sigaction");
 
        rules_setup(fd);