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Full Discussion: Scripting Question (For Loop)
Top Forums UNIX for Dummies Questions & Answers Scripting Question (For Loop) Post 302953182 by Corona688 on Tuesday 25th of August 2015 04:11:05 PM
Old 08-25-2015
Quote:
Originally Posted by shah9250
Last question though , is how does (*) cause the system to ignore spaces in file names?
It doesn't "ignore". * gives valid filenames, split where they should be.

But cramming the result of * into one string flattens it out. It forgets where the filenames begin and end.
Quote:
Also how does (*) know to refer to the output of (ls)
You have it completely backwards. * does not need ls's help to do anything. You can plug * into anything that takes multiple arguments, and the shell will convert it into filenames for you, before the command is even run.

Quote:
If (*) is a wildcard and refers to anything, how does using (*) in the for loop cause the system to read the output of ls (ignoring spaces)? Thanks!
It doesn't. ls isn't needed at all.
Last edited by Corona688; 08-25-2015 at 05:28 PM..
This User Gave Thanks to Corona688 For This Post:
shah9250
 

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LEARN ABOUT DEBIAN

pct-scanner-script

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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