有没有机会在第一个错误时停止 chown？

Question

当我使用递归 chown 时，我想在第一次出错时停止它。

$ chown -R /tmp/cache someuser
chown: changing ownership of `/tmp/cache/1/thumbnail/100x/9df78eab33525d08d6e5fb8d27136e95/h/d': Operation not permitted
chown: changing ownership of `/tmp/cache/1/thumbnail/100x/9df78eab33525d08d6e5fb8d27136e95/h': Operation not permitted
chown: changing ownership of `/tmp/cache/1/thumbnail/100x/9df78eab33525d08d6e5fb8d27136e95': Operation not permitted
chown: changing ownership of `/tmp/cache/1/thumbnail/100x': Operation not permitted
chown: changing ownership of `/tmp/cache/1/thumbnail': Operation not permitted
chown: changing ownership of `/tmp/cache/1': Operation not permitted
chown: changing ownership of `/tmp/cache': Operation not permitted

即我应该只得到 echo $?.
的第一个错误和状态代码“1” 可能吗？

Answer 1

没有。检测此类错误的唯一方法是观察标准错误，但是当您可以检测到错误并对错误做出反应时，chown 将继续运行。如果您需要在出现任何错误后采取措施，则需要运行 chown 分别对每个文件进行处理，如果出现错误则采取措施。

# Assuming bash 4 for simplicity; handling the recursive directory walk
# without ** is left as an exercise for the reader.
shopt -s globstar
for f in /tmp/cache/**/*; do
    chown "$f" someuser || break
done

（完全有可能有人可以实现 chown 并带有在第一个错误后停止的选项，但这样的选项在 POSIX 规范或 GNU chown.)

有没有机会在第一个错误时停止 chown？

Is there any opportunity to stop chown on first error?

error-handling

bash

chown