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Re: [Help-bash] What are the default values of signal handles?
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From: |
Chet Ramey |
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Subject: |
Re: [Help-bash] What are the default values of signal handles? |
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Date: |
Mon, 08 Jul 2013 21:15:48 -0400 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:17.0) Gecko/20130328 Thunderbird/17.0.5 |
On 7/8/13 8:48 PM, Peng Yu wrote:
>> Bash doesn't (and can't) document that. The `original values' are the
>> signal dispositions that were in place when the shell was started. That
>> depends on how the parent process set them.
>
> Do you know where I can find the document for default ubuntu and Mac
> OS X installations?
It doesn't really matter whether there is a system default. A process's
initial signal dispositions depend on its parent (SIG_DFL vs. SIG_IGN).
If you really want to know what happens on your system, write a program
that calls signal() on every signal and prints SIG_IGN or SIG_DFL as
appropriate.
Chet
--
``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/