exec.c: Open /dev/null r/w.

Just to prevent external programs from getting confused when they write
to fd 1 or 2.

diff --git a/exec.c b/exec.c
index 86362c3..ca59f03 100644 (file)
--- a/exec.c
+++ b/exec.c
@@ -37,7 +37,7 @@ static int para_exec(pid_t *pid, const char *file, char *const *const args, int
        if (fds[2] > 0 && pipe(err) < 0)
                goto err_out;
        if (!fds[0] || !fds[1] || !fds[2]) {
-               ret = para_open("/dev/null", O_RDONLY, 42);
+               ret = para_open("/dev/null", O_RDWR, 42);
                if (ret < 0)
                        goto err_out;
                null = ret;