# Git hooks and stdin/stderr/stdout.

1 messages from 2020-10-11 to 2020-10-11. Participants: Gabriel Nützi.
Thread: https://gitlist.dev/t/54388

## Gabriel Nützi, 2020-10-11 09:25

Subject: Git hooks and stdin/stderr/stdout.
Message-ID: <CAA9rTuf4gP5hy2GNubxGmDy_N2R+WoNX99sDUOo-QNym3pB=dQ@mail.gmail.com>
URL: https://gitlist.dev/e/CAA9rTuf4gP5hy2GNubxGmDy_N2R%2BWoNX99sDUOo-QNym3pB%3DdQ%40mail.gmail.com

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Dear all,

I have a question regarding git hooks and would have liked to get some
better understanding of how internally a hook is run. Especially I
want to know  what happens under the hood because the behavior kind of
puzzles me. So what I've understood:

When git runs the hook, git does
- connects stdin of the hook process to it (is that always the case?)
- redirects stdout of  the hook process to the stderr of the hook
process. So anything you write to stdout/stderr in the hook process
ends up in the stderr of the git process.

Is that understanding correct? Is there a doc describing this?

Thanks for the help.

BR Gabriel

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