From f1b1ac39f6ac5fc9b7ca59ff559bc588c852c89f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Thu, 20 Feb 2020 18:46:35 +0100
Subject: [PATCH] slave: check return value of chdir()

---
 slave.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/slave.c b/slave.c
index 3bff59b7..2703c784 100644
--- a/slave.c
+++ b/slave.c
@@ -103,7 +103,12 @@ slave_spawn(int ptmx, int argc, const char *cwd, char *const *argv,
         /* Child */
         close(fork_pipe[0]);  /* Close read end */
 
-        chdir(cwd);
+        if (chdir(cwd) < 0) {
+            const int _errno = errno;
+            LOG_ERRNO("failed to change working directory");
+            (void)!write(fork_pipe[1], &_errno, sizeof(_errno));
+            _exit(_errno);
+        }
 
         /* Restore signals */
         const struct sigaction sa = {.sa_handler = SIG_DFL};