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Re: Assignment-like word shouldn't be subjected to tilde expansion in PO
From: |
Chet Ramey |
Subject: |
Re: Assignment-like word shouldn't be subjected to tilde expansion in POSIX mode |
Date: |
Sun, 19 Jul 2020 15:21:07 -0400 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
On 7/19/20 1:47 AM, Oğuz wrote:
> By the way,
> wouldn't it be better if the same tilde expansion rules as with assignment
> statements was applied to parameter expansions that assign default values?
> Like,
>
> unset foo
> echo ${foo=~:~otheruser}
>
> assigns `/home/oguz:~otheruser' to `foo' regardless of whether `otheruser'
> is a valid login name for an existing user.
Maybe, but Posix says this isn't a variable assignment context, as POSIX
defines variable assignments, and technically the shell shouldn't perform
tilde expansions after `=' or `:' at all. You could argue that bash has a
bug here in that it expands the tilde after the `='.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/
- Assignment-like word shouldn't be subjected to tilde expansion in POSIX mode, Oğuz, 2020/07/18
- Re: Assignment-like word shouldn't be subjected to tilde expansion in POSIX mode, Chet Ramey, 2020/07/18
- Re: Assignment-like word shouldn't be subjected to tilde expansion in POSIX mode, Oğuz, 2020/07/19
- Re: Assignment-like word shouldn't be subjected to tilde expansion in POSIX mode, Robert Elz, 2020/07/20
- Re: Assignment-like word shouldn't be subjected to tilde expansion in POSIX mode, Chet Ramey, 2020/07/20
- Re: Assignment-like word shouldn't be subjected to tilde expansion in POSIX mode, Robert Elz, 2020/07/30
- Re: Assignment-like word shouldn't be subjected to tilde expansion in POSIX mode, Chet Ramey, 2020/07/31
Re: Assignment-like word shouldn't be subjected to tilde expansion in POSIX mode, M. Nejat AYDIN, 2020/07/21