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Top Forums UNIX for Dummies Questions & Answers Check for entry of specific pattern Post 302836027 by TAPE on Tuesday 23rd of July 2013 11:36:22 AM
Old 07-23-2013
Check for entry of specific pattern

Hey Guys and Gals,

I am having trouble with what I thought shouldn't be hard..

In a script I am working on there is a need to enter a MAC address.

MAC addresses are formatted ;
XX:XX:XX:XX:XX:XX

where X can be 0-9, a-f or A-F


So in the sample script the query is something along the lines of ;
(realize the syntax is wrong but hope you get what I am getting at Smilie )

Code:
 
if [[ $INPUT == [0-9a-fA-F][0-9a-fA-F]:[0-9a-fA-F][0-9a-fA-F]:[0-9a-fA-F][0-9a-fA-F]:[0-9a-fA-F][0-9a-fA-F]:[0-9a-fA-F][0-9a-fA-F]:[0-9a-fA-F][0-9a-fA-F] ]] ; then echo "Happy Puppy :) " 
else 
echo "Sad Puppy :( "
fi


Obviously the above is not working, but what would be the best way to check whether the variable is indeed following the desired pattern ?
 

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MACLABEL(7)					       BSD Miscellaneous Information Manual					       MACLABEL(7)

NAME
maclabel -- Mandatory Access Control label format DESCRIPTION
If Mandatory Access Control, or MAC, is enabled in the kernel, then in addition to the traditional credentials, each subject (typically a user or a socket) and object (file system object, socket, etc.) is given a MAC label. The MAC label specifies the necessary subject-specific or object-specific information necessary for a MAC security policy to enforce access control on the subject/object. The format for a MAC label is defined as follows: policy1/qualifier1,policy2/qualifier2,... A MAC label consists of a policy name, followed by a forward slash, followed by the subject or object's qualifier, optionally followed by a comma and one or more additional policy labels. For example: biba/low(low-low) biba/high(low-high),mls/equal(equal-equal),partition/0 SEE ALSO
mac(3), posix1e(3), mac_biba(4), mac_bsdextended(4), mac_ifoff(4), mac_mls(4), mac_none(4), mac_partition(4), mac_seeotheruids(4), mac_test(4), login.conf(5), getfmac(8), getpmac(8), ifconfig(8), setfmac(8), setpmac(8), mac(9) HISTORY
MAC first appeared in FreeBSD 5.0. AUTHORS
This software was contributed to the FreeBSD Project by NAI Labs, the Security Research Division of Network Associates Inc. under DARPA/SPAWAR contract N66001-01-C-8035 (``CBOSS''), as part of the DARPA CHATS research program. BSD
October 25, 2002 BSD
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