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Re: cannot pipe output of trap
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From: |
Chet Ramey |
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Subject: |
Re: cannot pipe output of trap |
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Date: |
Wed, 23 Jul 2008 10:41:19 -0400 |
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User-agent: |
Thunderbird 2.0.0.14 (Macintosh/20080421) |
proway.imbusch@daimler.com wrote:
Machine Type: i686-pc-cygwin
Bash Version: 3.2
Patch Level: 39
Release Status: release
Description:
After registering trap handlers, 'trap | cat' does not deliver any
output ('trap' does).
Each element of a pipeline is run in a separate process. The subshell
forked to run each element does not inherit traps from its parent --
disposition of trapped signals is reset to the default. This is as Posix
specifies.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/