[PATCH 1/7] passt: Explicitly check return value of chdir()

...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 --- 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