signal handler must use the save_errno dance, and massage a variable

of type 'volatile sig_atomic_t'
ok tb

1 files changed, 5 insertions, 2 deletions

diff --git a/src/usr.bin/openssl/speed.c b/src/usr.bin/openssl/speed.c
index f50d224064..84ecb9b3ba 100644
--- a/src/usr.bin/openssl/speed.c
+++ b/src/usr.bin/openssl/speed.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: speed.c,v 1.34 2023/07/27 07:01:50 tb Exp $ */
+/* $OpenBSD: speed.c,v 1.35 2024/07/01 18:52:22 deraadt Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -150,7 +150,7 @@
 #include "./testrsa.h"
 
 #define BUFSIZE (1024*8+64)
-int run = 0;
+volatile sig_atomic_t run = 0;
 
 static int mr = 0;
 static int usertime = 1;
@@ -193,7 +193,10 @@ static void sig_done(int sig);
 static void
 sig_done(int sig)
 {
+        int save_errno = errno;
+
         signal(SIGALRM, sig_done);
+        errno = save_errno;
         run = 0;
 }