use pthread_sigmask instead of sigprocmask

pthread is already in our vmem due to our dependencies so link to it
explicitly and use pthread_sigmask to avoid buggy sigprocmask in
multi-threaded applications.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/pty.c b/src/pty.c
index 7c592e6..0888f38 100644
--- a/src/pty.c
+++ b/src/pty.c
@@ -25,6 +25,7 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <pthread.h>
 #include <pty.h>
 #include <signal.h>
 #include <stdlib.h>
@@ -131,7 +132,7 @@ static int setup_child(int master, struct winsize *ws)
 
 	/* The child should not inherit our signal mask. */
 	sigemptyset(&sigset);
-	ret = sigprocmask(SIG_SETMASK, &sigset, NULL);
+	ret = pthread_sigmask(SIG_SETMASK, &sigset, NULL);
 	if (ret)
 		log_warn("cannot reset blocked signals: %m");