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Full Discussion: perl, splitting out specific parts of the string
Top Forums Shell Programming and Scripting perl, splitting out specific parts of the string Post 302571394 by rethink on Monday 7th of November 2011 08:37:32 AM
Old 11-07-2011
perl, splitting out specific parts of the string
Hi there,

I have an output from a command like this

Code:
 
# ypcat -k netgroup.byuser| grep steven
steven.* users_main,users_sysadmin,users_global,users_backup_team

and wanted to pull the 'users' netgroups returned into a perl array, that will look like this

Code:
 
users_main
users_sysadmin
users_global
users_backup_team

I would pretty happy with how to do it if everything in the string was a users_* split by a comma, but because I have the 'steven.*' with a space after it it falls over a bit,

does anyone know how I can only include the bits of the string that start with 'users_' into my array, excluding everything else? so effectively only buildng an array from the red bits below

Code:
 
# ypcat -k netgroup.byuser| grep steven
steven.* users_main,users_sysadmin,users_global,users_backup_team

any help would be greatly appreciated
Last edited by rethink; 11-07-2011 at 09:52 AM..
 

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LEARN ABOUT DEBIAN

revnetgroup

REVNETGROUP(8)							 Reference Manual						    REVNETGROUP(8)

NAME

       revnetgroup - generate reverse netgroup data

SYNOPSIS

       /usr/lib/yp/revnetgroup [-u|-h]

DESCRIPTION

       Revnetgroup  processes the standard input in netgroup(5) format into what is called reverse netgroup form. That is, where the original file
       shows netgroup memberships in terms of which members reside in a particular group, the reverse netgroup format specifies  what  groups  are
       associated  with a particular member. This information is used to generate the netgroup.byuser and netgroup.byhosts NIS maps. These reverse
       netgroup maps are used to help speed up netgroup lookups, particularly for the innetgr library function.

       The revnetgroup command prints its results on the standard output. It is usually called only by /var/yp/Makefile when  rebuilding  the  NIS
       netgroup maps.

OPTIONS

       The revnetgroup command supports the following options:

       -u     Generate netgroup.byuser output; only username information in the original netgroup file is processed.

       -h     Generate netgroup.byhost output; only hostname information in the original netgroup file is processed.

       Note at least one of the both flags must be specified.

FILES

       /var/yp/Makefile    The Makefile to build the NIS databases
       /etc/netgroup	   the default netgroup database file. This file is most often found only on the NIS master server

SEE ALSO

       getnetgrent(3), netgroup(5),

AUTHOR

       revnetgroup was written by Thorsten Kukuk <kukuk@suse.de>.

YP Server							    August 2001 						    REVNETGROUP(8)
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