console: set SFD_CLOEXEC on signal fd

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/src/lxc/console.c b/src/lxc/console.c
index f77586ca3daa07426dedfd79ccf13dd8ddbb3080..19c8990e8f4a0917f679c8e389749baa5b0e6b59 100644 (file)
--- a/src/lxc/console.c
+++ b/src/lxc/console.c
@@ -139,7 +139,7 @@ struct lxc_tty_state *lxc_console_sigwinch_init(int srcfd, int dstfd)
                return ts;
        }
 
-       ts->sigfd = signalfd(-1, &mask, 0);
+       ts->sigfd = signalfd(-1, &mask, SFD_CLOEXEC);
        if (ts->sigfd < 0) {
                SYSERROR("failed to create signal fd");
                sigprocmask(SIG_SETMASK, &ts->oldmask, NULL);