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Top Forums Shell Programming and Scripting How to trap set -o nounset in bash Post 302534703 by DGPickett on Tuesday 28th of June 2011 02:01:50 PM
Old 06-28-2011
It is just a bit in VM, where is the signal?

Why not avoid touching unset variables in the trap or whatever ?

Code:
$ truss bash -c 'set -u ; echo mark ; echo $haha'
execve("/ndmtest/clmstux/nbkodln/myroot/usr/local/bin/bash", 0x7b0f54b8, 0x7b0f54c8) = 0 [32-bit]
 .
 .
 .
sigsetstatemask(0x17, NULL, 1073851480)                    = 0
getpeername(0, 0x7b0f59a0, 0x7b0f599c)                     ERR#216 ENOTSOCK
sigsetstatemask(0x17, NULL, 1073851480)                    = 0
sigsetstatemask(0x17, NULL, 1073851480)                    = 0
mark
write(1, "m a r k \n", 5)                                  = 5
bash: haha: unbound variable
write(2, "b a s h :   h a h a :   u n b o ".., 29)         = 29
sigsetstatemask(0x17, 0x4001ac58, 0)                       = 0
sigsetstatemask(0x17, 0x4001ac58, 0)                       = 0
exit(127)


Last edited by DGPickett; 06-28-2011 at 03:07 PM..
 

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PCT-SCANNER-SCRIPT(1)					      General Commands Manual					     PCT-SCANNER-SCRIPT(1)

NAME
pct-scanner-script - easy scan and create merged DjVu and PDF documents for archiving SYNOPSIS
pct-scanner-script [--help] DESCRIPTION
pct-scanner-script is a bash script and configuration system to easily scan documents and create a digital archiving. It can create DjVu PDF and JPEG outputs, in merged and individual files. It also has a configuration system where different configurations can be defined, making it easy to switch between configurations. Please use pct-scanner-script --help to find all program options, the complete help, and all examples. Features: - auto archiving in merged and individual DjVu, PDF, and JPEG files - auto and manual resume when scanning somehow fails - cascading configuration system, for easy customizing - easy command-line-style bash program, with useful options - archiving made possible with both adf and flatbed scanners - built for productivity and daily use - uses bash, scanadf and other mainstream processing tools - multilanguage commandline output OPTIONS
-h, --help, -? Show summary of options, help, and examples. DEBUGGING
This program is a helper script to easy scan and automated digital document archiving for normal and adf scanners. You can debug this script by running it as bash -x pct-scanner-script [options]. The script is just a nice wrapper for the scanadf, DjVu and PDF tools. SEE ALSO
scanadf(1), AUTHOR
pct-scanner-script and this manual page are written by: Jelle de Jong <jelledejong@powercraft.nl>. March 31, 2009 PCT-SCANNER-SCRIPT(1)
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