Re: Conditions with logical operators and nested groups execute "if" and "else"

From	PePa <solusos@passchier.net>
Newsgroups	gnu.bash.bug
Subject	Re: Conditions with logical operators and nested groups execute "if" and "else"
Date	2018-05-31 20:05 +0700
Message-ID	<mailman.873.1527781619.1292.bug-bash@gnu.org> (permalink)
References	<5B0F3BB2.1000006@tlinx.org> <CAM4RgKgOACdJtjBFpKMhfoXvbSwun=84pPdADNaJVKcd-Z5GFg@mail.gmail.com> <20180522122911.pgnaedyb55uhxugw@eeg.ccf.org> <1795.1527749654@jinx.noi.kre.to>

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On 05/31/2018 01:54 PM, Robert Elz wrote:
> I am not sure what predence rule you see working as
> expected, but in sh (bash, or any other Bourne syntax
> or POSIX shell) there is no precedence for && and ||
> they (in the absense of grouping) are simply executed
> left to right as written.

Here is an easy way to figure out how and/or-lists work: Given that &&
and || have the lowest precedence of all operators (except for ; and &),
they can be thought of as concatenating commands/blocks/pipelines, and
the execution rule for an and/or-list is:

If the exit-status of the command/block/pipeline is 0, continue after
the next &&, otherwise continue after the next || in the and/or-list.

Cheers,
Peter

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Re: Conditions with logical operators and nested groups execute "if" and "else" PePa <solusos@passchier.net> - 2018-05-31 20:05 +0700

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