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Full Discussion: users and groups /etc/group parsing
Top Forums Shell Programming and Scripting users and groups /etc/group parsing Post 302522120 by verdepollo on Friday 13th of May 2011 10:49:32 AM
Old 05-13-2011
Quote:
there is possible in sh to create a function who return a boolean value?
You can use true or false commands:

Code:
[root@atlas /]# true
[root@atlas /]# echo $?
0
[root@atlas /]# false
[root@atlas /]# echo $?
1
[root@atlas /]#

Or use your own function:

Code:
function f(){
exit 0
}

Quote:
2)i have to verify if an user belongs to a group and i think it is needed to create a function which take two parameter and return a boolean value. in fact i have to parse /etc/group file and try to find out if my user (user taken from param1) belongs to group (group taken from param2). Any ideas? Thanks
Maybe something like this?

Code:
[root@atlas /]# groups root | grep -q wheel
[root@atlas /]# echo $?
0
[root@atlas /]# groups root | grep -q asdf
[root@atlas /]# echo $?
1
[root@atlas /]#

 

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LEARN ABOUT DEBIAN

mobile-atlas-creator

MOBILE-ATLAS-CREAT(1)					  mobile-atlas-creator User Manu				     MOBILE-ATLAS-CREAT(1)

NAME

       mobile-atlas-creator - program to create atlas archive for mobile devices

SYNOPSIS

       mobile-atlas-creator

DESCRIPTION

       This manual page documents briefly the mobile-atlas-creator command.

       This manual page was written for the Debian distribution because the original program does not have a manual page.

       mobile-atlas-creator (formerly known as TrekBuddy Atlas Creator) is an open source (GPL) program which creates offline atlases for GPS
       handhelds and cell phone applications like TrekBuddy, AndNav and other Android and WindowsCE based applications. For the full list of
       supported applications please see the features section. Additionally individual maps can be exported as one large PNG image with
       calibration MAP file for OziExplorer. As source for an offline atlas Mobile Atlas Creator can use a large number of different online maps
       such as OpenStreetMap, Google Maps, Microsoft/Bing Maps, Yahoo Maps and many more online map providers.

OPTIONS

       The program does not have any options.

AUTHOR

       Ying-Chun Liu <paulliu@debian.org>
	   Wrote this manpage for the Debian system.

COPYRIGHT

       Copyright (C) 2010 Ying-Chun Liu (PaulLiu)

       This manual page was written for the Debian system (and may be used by others).

       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 or (at
       your option) any later version published by the Free Software Foundation.

       On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.

mobile-atlas-creator						    06/05/2012						     MOBILE-ATLAS-CREAT(1)
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