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Re: discrepancy with variable assignments and simple commands between sh
Re: discrepancy with variable assignments and simple commands between sh and bash
Wed, 25 Aug 2010 09:36:30 -0400
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On 8/25/10 1:39 AM, Jan Schampera wrote:
> Okay, I think I found something
> [POSIX excerpts]
> - When a function is executed, it shall have the syntax-error and
> variable-assignment properties described for special built-in utilities in
> the enumerated list at the beginning of Special Built-In Utilities .
> - Variable assignments specified with special built-in utilities remain in
> effect after the built-in completes; this shall not be the case with a
> regular built-in or other utility.
> [Bash docs about POSIX mode]
> 24. Assignment statements preceding shell function calls persist in the
> shell environment after the function returns, as if a POSIX
> special builtin command had been executed.
> Conclusion (still waiting for the Austin Group undercover guy):
> - POSIX specifies this behaviour
> - Bash in Bash-mode overrides this (which results in intuitive behaviour,
> - Bash in POSIX-mode respects it
Your conclusions are correct.
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU address@hidden http://cnswww.cns.cwru.edu/~chet/