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Re: wrong lineno inside trap?


From: Eric Blake
Subject: Re: wrong lineno inside trap?
Date: Fri, 09 Jan 2009 18:44:40 -0700
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According to peter360 on 1/9/2009 6:07 PM:
> trap '
> 
> echo this is line 3, but LINENO=$LINENO
> 
> ' 0
> 
> echo this is line 7, and LINENO=$LINENO

> Is this a known problem?   Thanks.

In general, LINENO handling is inconsistent among shells.  The presence of
single vs. multi-line constructs, eval, here-docs, and shell functions
cause different shells to give different values to LINENO.  For more
documentation on this, see:
http://www.gnu.org/software/autoconf/manual/html_node/Special-Shell-Variables.html#Special-Shell-Variables

and this update to the documentation source, detailing even more
inconsistencies:
http://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=10d26aa

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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