cp-does-not-copy-unreadable-file

来自「最新的busybox源码」· 代码 · 共 12 行

touch foo
chmod a-r foo
set +e
if test `id -u` = 0; then
    # run as user with nonzero uid
    setuidgid 1 busybox cp foo bar
else
    busybox cp foo bar
fi
set -e
test ! -f bar