signal race fixes

4 files changed, 31 insertions, 10 deletions

diff --git a/regress/lib/libc_r/pause/pause.c b/regress/lib/libc_r/pause/pause.c
index 8185e7ca2d0..20a49f061a6 100644
--- a/regress/lib/libc_r/pause/pause.c
+++ b/regress/lib/libc_r/pause/pause.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pause.c,v 1.1 2001/08/15 14:37:12 fgsch Exp $	*/
+/*	$OpenBSD: pause.c,v 1.2 2001/11/11 23:26:35 deraadt Exp $	*/
 /*
  * Copyright (c) 1993, 1994, 1995, 1996 by Chris Provenzano and contributors, 
  * proven@mit.edu All rights reserved.
@@ -48,7 +48,12 @@ void
 handler(sig) 
 	int sig;
 {
-	printf("%s\n", strsignal(sig));
+	int save_errno = errno;
+	char buf[8192];
+
+	snprintf(buf, sizeof buf, "%s\n", strsignal(sig));
+	write(STDOUT_FILENO, buf, strlen(buf));
+	errno = save_errno;
 }
 
 int
diff --git a/regress/lib/libc_r/signal/signal.c b/regress/lib/libc_r/signal/signal.c
index 4955dd86f83..2d79cf2e08a 100644
--- a/regress/lib/libc_r/signal/signal.c
+++ b/regress/lib/libc_r/signal/signal.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: signal.c,v 1.2 2001/11/03 04:33:48 marc Exp $	*/
+/*	$OpenBSD: signal.c,v 1.3 2001/11/11 23:26:35 deraadt Exp $	*/
 /* David Leonard <d@openbsd.org>, 2001. Public Domain. */
 
 /*
@@ -31,9 +31,12 @@ void
 handler(sig)
 	int sig;
 {
+	int save_errno = errno;
+
 	alarmed = 1;
 	alarm(1);
 	signal(SIGALRM, handler);
+	errno = save_errno;
 }
 
 int
diff --git a/regress/lib/libc_r/sigsuspend/sigsuspend.c b/regress/lib/libc_r/sigsuspend/sigsuspend.c
index df3b990dafb..86a9ff959ef 100644
--- a/regress/lib/libc_r/sigsuspend/sigsuspend.c
+++ b/regress/lib/libc_r/sigsuspend/sigsuspend.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigsuspend.c,v 1.1 2001/08/15 14:37:13 fgsch Exp $	*/
+/*	$OpenBSD: sigsuspend.c,v 1.2 2001/11/11 23:26:35 deraadt Exp $	*/
 /*
  * Copyright (c) 1998 Daniel M. Eischen <eischen@vigrid.com>
  * All rights reserved.
@@ -93,6 +93,8 @@ sigsuspender (void *arg)
 static void
 sighandler (int signo)
 {
+	int save_errno = errno;
+	char buf[8192];
 	sigset_t set;
 	pthread_t self;
 
@@ -107,14 +109,19 @@ sighandler (int signo)
 	if (self == suspender_tid) {
 		sigfifo[fifo_depth] = signo;
 		fifo_depth++;
-		printf ("  -> Suspender thread signal handler caught "
+		snprintf(buf, sizeof buf,
+		    "  -> Suspender thread signal handler caught "
 			"signal %d (%s)\n", signo, strsignal(signo));
+		write(STDOUT_FILENO, buf, strlen(buf));
 		sigprocmask (SIG_SETMASK, NULL, &set);
 		ASSERT(set == suspender_mask);
-	}
-	else
-		printf ("  -> Main thread signal handler caught "
+	} else {
+		snprintf(buf, sizeof buf,
+		    "  -> Main thread signal handler caught "
 			"signal %d (%s)\n", signo, strsignal(signo));
+		write(STDOUT_FILENO, buf, strlen(buf));
+	}
+	errno = save_errno;
 }
 
 
diff --git a/regress/lib/libc_r/sigwait/sigwait.c b/regress/lib/libc_r/sigwait/sigwait.c
index a166eaf2a1e..70ed4f576cc 100644
--- a/regress/lib/libc_r/sigwait/sigwait.c
+++ b/regress/lib/libc_r/sigwait/sigwait.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sigwait.c,v 1.1 2001/08/15 14:37:16 fgsch Exp $	*/
+/*	$OpenBSD: sigwait.c,v 1.2 2001/11/11 23:26:35 deraadt Exp $	*/
 /*
  * Copyright (c) 1998 Daniel M. Eischen <eischen@vigrid.com>
  * All rights reserved.
@@ -80,11 +80,17 @@ sigwaiter (void *arg)
 static void
 sighandler (int signo)
 {
-	printf ("  -> Signal handler caught signal %d (%s) in thread %p\n",
+	int save_errno = errno;
+	char buf[8192];
+
+	snprintf(buf, sizeof buf,
+	    "  -> Signal handler caught signal %d (%s) in thread %p\n",
 	    signo, strsignal(signo), pthread_self());
+	write(STDOUT_FILENO, buf, strlen(buf));
 
 	if ((signo >= 0) && (signo <= NSIG))
 		sigcounts[signo]++;
+	errno = save_errno;
 }
 
 int main (int argc, char *argv[])