05-08-2015
1) awk with default field separators would set NF to 0 for those lines. Alternatively, you could use the regex /^[ ]*$/ (space and <TAB>) to identify them.
2) You'll need to loop over all fields and check for the length of each.
3) "Something which is not understandable" can be very locale depending. All of your examples "¢'Á|äÃ" are very essential in languages other than (US) English or necessary for e.g. record/parameter delimiting.
Last edited by RudiC; 05-08-2015 at 05:28 AM..
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LEARN ABOUT DEBIAN
licensecheck
LICENSECHECK(1) LICENSECHECK(1)
NAME
licensecheck - simple license checker for source files
SYNOPSIS
licensecheck --help|--version
licensecheck [--no-conf] [--verbose] [--copyright] [-l|--lines=N] [-i|--ignore=regex] [-c|--check=regex] [-m|--machine] [-r|--recursive]
list of files and directories to check
DESCRIPTION
licensecheck attempts to determine the license that applies to each file passed to it, by searching the start of the file for text
belonging to various licenses.
If any of the arguments passed are directories, licensecheck will add the files contained within to the list of files to process.
OPTIONS
--verbose, --no-verbose
Specify whether to output the text being processed from each file before the corresponding license information.
Default is to be quiet.
-l=N, --lines=N
Specify the number of lines of each file's header which should be parsed for license information. (Default is 60).
-i=regex, --ignore=regex
When processing the list of files and directories, the regular expression specified by this option will be used to indicate those which
should not be considered (e.g. backup files, VCS metadata).
-r, --recursive
Specify that the contents of directories should be added recursively.
-c=regex, --check=regex
Specify a pattern against which filenames will be matched in order to decide which files to check the license of.
The default includes common source files.
--copyright
Also display copyright text found within the file
-m, --machine
Display the information in a machine readable way, i.e. in the form <file><tab><license>[<tab><copyright>] so that it can be easily
sorted and/or filtered, e.g. with the awk and sort commands. Note that using the --verbose option will kill the readability.
--no-conf, --noconf
Do not read any configuration files. This can only be used as the first option given on the command-line.
CONFIGURATION VARIABLES
The two configuration files /etc/devscripts.conf and ~/.devscripts are sourced by a shell in that order to set configuration variables.
Command line options can be used to override configuration file settings. Environment variable settings are ignored for this purpose. The
currently recognised variables are:
LICENSECHECK_VERBOSE
If this is set to yes, then it is the same as the --verbose command line parameter being used. The default is no.
LICENSECHECK_PARSELINES
If this is set to a positive number then the specified number of lines at the start of each file will be read whilst attempting to
determine the license(s) in use. This is equivalent to the --lines command line option.
LICENSE
This code is copyright by Adam D. Barratt <adam@adam-barratt.org.uk>, all rights reserved; based on a script of the same name from the KDE
SDK, which is copyright by <dfaure@kde.org>. This program comes with ABSOLUTELY NO WARRANTY. You are free to redistribute this code under
the terms of the GNU General Public License, version 2 or later.
AUTHOR
Adam D. Barratt <adam@adam-barratt.org.uk>
Debian Utilities 2013-12-23 LICENSECHECK(1)