Add function get_null_fd(), to reduce code redundancy.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/process.c b/lib/process.c
index f752a3560..7b583cac0 100644
--- a/lib/process.c
+++ b/lib/process.c
@@ -187,6 +187,8 @@ process_start(char **argv,
         unblock_sigchld(&oldsigs);
         for (fd = 0; fd < fd_max; fd++) {
             if (is_member(fd, null_fds, n_null_fds)) {
+                /* We can't use get_null_fd() here because we might have
+                 * already closed its fd. */
                 int nullfd = open("/dev/null", O_RDWR);
                 dup2(nullfd, fd);
                 close(nullfd);