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From: =?UTF-8?B?SsOpcsOpbWllIFJvcXVldA==?= <arkanosis@gmail.com>
Date: Mon, 11 Apr 2011 17:52:24 +0200
Message-ID: <BANLkTimLwZCd462OWiNCt9Qb6hJAptmJ7Q@mail.gmail.com>
Subject: $pipestatus and shell functions
To: Zsh Users <zsh-users@zsh.org>
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Hello,

I'm somewhat confused by the behaviour of the $pipestatus variable:

$ true | true ; echo $pipestatus
0 0
$ false | true ; echo $pipestatus
1 0
$ true | false ; echo $pipestatus
0 1
$ false | false ; echo $pipestatus
0 0
$ foo() { true }
$ true | foo ; echo $pipestatus
0 0
$ false | foo ; echo $pipestatus
1 0

So far, everything is fine for me, but then:

$ foo() { false | true }
$ true | foo ; echo $pipestatus
1 0
$ foo() { false | false }
$ true | foo ; echo $pipestatus
1 1
$ foo() { true | true | true }
$ false | foo ; echo $pipestatus
0 0 0

So $pipestatus is defeated by multiple pipelining=E2=80=A6

Is this by design? If so, is there some not-so-complicated workaround
to get the exit code of process A in =E2=80=9C A | B =E2=80=9D for any B (i=
e. even if
B is itself a shell function with a pipe)?

Thanks in advance, best regards,

--=20
J=C3=A9r=C3=A9mie