...it doesn't actually matter as we're checking errno at the very
end, but, depending on build flags, chdir() might be declared with
warn_unused_result and the compiler issues a warning.
Signed-off-by: Stefano Brivio <sbrivio(a)redhat.com>
---
passt.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/passt.c b/passt.c
index 3d18d1f..038d50a 100644
--- a/passt.c
+++ b/passt.c
@@ -260,7 +260,9 @@ static int sandbox(struct ctx *c)
mount("", "/", "", MS_UNBINDABLE | MS_REC, NULL);
mount("", TMPDIR, "tmpfs", MS_NODEV | MS_NOEXEC | MS_NOSUID |
MS_RDONLY,
"nr_inodes=2,nr_blocks=0");
- chdir(TMPDIR);
+ if (chdir(TMPDIR))
+ return -errno;
+
syscall(SYS_pivot_root, ".", ".");
umount2(".", MNT_DETACH | UMOUNT_NOFOLLOW);
--
2.34.1