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Re: Q on Bash's self-documented POSIX compliance...
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From: |
Linda Walsh |
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Subject: |
Re: Q on Bash's self-documented POSIX compliance... |
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Date: |
Sun, 27 Jan 2013 12:55:31 -0800 |
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User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.8.1.24) Gecko/20100228 Lightning/0.9 Thunderbird/2.0.0.24 Mnenhy/0.7.6.666 |
Clark WANG wrote:
I think every POSIX compatible shell has its own extensions so there's
no guarantee that a script which works fine in shell A would still work
in shell B even if both A and B are POSIX compatible unless the script
writer only uses POSIX compatible features. Is there a pure POSIX shell
without adding any extensions?
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Excellent point -- then what is the point of POSIX compatibility?
Considering that there seems to be no way to run Bash in POSIX-only mode,
(and likely other POSIX-'compatible' [sic]) shells are similar -- they support
the minimums, but have no way for someone to determine if their script is
POSIX compatible (meaning only using POSIX)...