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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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MAC_STUB(4)						   BSD Kernel Interfaces Manual 					       MAC_STUB(4)

NAME
mac_stub -- MAC policy stub module SYNOPSIS
To compile the sample policy into your kernel, place the following lines in your kernel configuration file: options MAC options MAC_STUB Alternately, to load the sample module at boot time, place the following line in your kernel configuration file: options MAC and in loader.conf(5): mac_stub_load="YES" DESCRIPTION
The mac_stub policy module implements a sample MAC policy that has no effect on access control in the system. Unlike mac_none(4), each MAC entry point is defined as a ``no-op'', so the policy module will be entered for each event, but no change in system behavior should result. Label Format No labels are defined for mac_stub. SEE ALSO
mac(4), mac_biba(4), mac_bsdextended(4), mac_ifoff(4), mac_lomac(4), mac_mls(4), mac_none(4), mac_partition(4), mac_portacl(4), mac_seeotheruids(4), mac_test(4), mac(9) HISTORY
The mac_stub policy module first appeared in FreeBSD 5.1 and was developed by the TrustedBSD Project. AUTHORS
This software was contributed to the FreeBSD Project by Network Associates 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. BUGS
See mac(9) concerning appropriateness for production use. The TrustedBSD MAC Framework is considered experimental in FreeBSD. While the MAC Framework design is intended to support the containment of the root user, not all attack channels are currently protected by entry point checks. As such, MAC Framework policies should not be relied on, in isolation, to protect against a malicious privileged user. BSD
December 1, 2002 BSD
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