If we run case on old kernel that doesn't support mount_setattr and
then fail on our own function before call is_setgid/is_setuid function
to reset errno, run_test will print "Function not implement" error.
Signed-off-by: Yang Xu <xuyang2018.jy@xxxxxxxxxxx>
---
src/idmapped-mounts/idmapped-mounts.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/src/idmapped-mounts/idmapped-mounts.c b/src/idmapped-mounts/idmapped-mounts.c
index 4cf6c3bb..8e6405c5 100644
--- a/src/idmapped-mounts/idmapped-mounts.c
+++ b/src/idmapped-mounts/idmapped-mounts.c
@@ -14070,6 +14070,8 @@ int main(int argc, char *argv[])
die("failed to open %s", t_mountpoint_scratch);
t_fs_allow_idmap = fs_allow_idmap();
+ /* don't copy ENOSYS errno to child process on older kernel */
+ errno = 0;
if (supported) {
/*
* Caller just wants to know whether the filesystem we're on
--
2.27.0
