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Re: read and env variables + POSIX => SEGFAULT


From: Linda Walsh
Subject: Re: read and env variables + POSIX => SEGFAULT
Date: Sun, 11 Oct 2015 14:50:15 -0700
User-agent: Thunderbird



Geir Hauge wrote:
On Sat, Oct 10, 2015 at 08:01:05PM -0700, Linda Walsh wrote:
# this is odd: 2vars with content for 2:
unset a b
a= b= read a b <<< x y
declare -p a b
declare -- a="x"
declare -- b=""

# -- where did "y" go?

    read a b <<< x y
is the same as
    read a b y <<< x

If you escape the space, to make it literal instead of syntactical, you'll get
the expected result:

    $ a= b= read a b <<< x\ y
    $ declare -p a b
    declare -- a="x"
    declare -- b="y"
---
        Was sorta meant as a rhetorical Question in the batch
of examples that seem to have differing behavior -- but especially
in contrast with the POSIX versions that dump core.

Bad-syntax shouldn't yield Segmentation Violations...





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