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Re: trap builtin ignores function named 'stop' as arg

From: Chet Ramey
Subject: Re: trap builtin ignores function named 'stop' as arg
Date: Thu, 6 May 2004 15:42:16 -0400

> Machine Type: i386-redhat-linux-gnu
> Bash Version: 2.05b
> Patch Level: 0
> Release Status: release
> Description:
> Given "function stop() { ... }" in a bash script and "trap stop SIGINT"
> command later in the script, no "trap" is set. Also, the status returned
> by 'trap' command is 0.

This particular problem is caused by the fact that bash does not require
the  `SIG' prefix on a signal specification.  It will interpret `stop'
and `sigstop' as identical, and, in this case, reset the handlers for
SIGSTOP and SIGINT to their default values.

The easy workaround is to use

        trap ' stop' SIGINT


``The lyf so short, the craft so long to lerne.'' - Chaucer
( ``Discere est Dolere'' -- chet )
Chet Ramey, ITS, CWRU    address@hidden    http://tiswww.tis.cwru.edu/~chet/

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