Shlomi Fish wrote on 2003-10-12:
> I want that if one of the (first) components of the pipeline exits with an
> error code, I'll know about it somehow. How?
>
info bash --index PIPESTATUS
$ true | false | true | false; echo [EMAIL PROTECTED]
0 1 0 1
$ { true | false | true | false; }; echo [EMAIL PROTECTED]
0 1 0 1
However, using parenthesis you launch the whole pipeline in a subshell
so it won't work:
$ ( true | false | true | false; ); echo [EMAIL PROTECTED]
1
Also, it mysteriously seems to be lost after every command in
interactive mode:
$ true | false | true | false
$ echo [EMAIL PROTECTED]
0
Although it does work in non-interactive mode:
$ echo $'true | false | true | false\necho [EMAIL PROTECTED]' | sh
0 1 0 1
If you want a less fragile approach, Oded Arbel gave a good advice.
--
Beni Cherniavsky <[EMAIL PROTECTED]>
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