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Full Discussion: regular expression
Top Forums Shell Programming and Scripting regular expression Post 302354188 by vinoo128 on Thursday 17th of September 2009 11:14:02 AM
Old 09-17-2009
regular expression
Hi
In the case expression below,the first condition is if the value is an 8 digit number then do the associated steps.

What i want to know is is there a beter way to write this regular expression?
[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9])

i tried [0-9]\{8\} but it didnt work?

Code:
 
while [ "$1" != "" ]; do 
case "$1" in 
[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9])run_date=$1
shift ;;
-f)reload_monthend=Y
shift;;
*)echo "Invalid Parameters"
exit 1;;
esac


 

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LEARN ABOUT PHP

tc-tcindex

Traffic control index filter(8) 				       Linux					   Traffic control index filter(8)

NAME

       tcindex - traffic control index filter

SYNOPSIS

       tc filter ... tcindex [ hash SIZE ] [ mask MASK ] [ shift SHIFT ] [ pass_on | fall_through ] [ classid CLASSID ] [ action ACTION_SPEC ]

DESCRIPTION

       This  filter allows to match packets based on their tcindex field value, i.e. the combination of the DSCP and ECN fields as present in IPv4
       and IPv6 headers.

OPTIONS

       action ACTION_SPEC
	      Apply an action from the generic actions framework on matching packets.

       classid CLASSID
	      Push matching packets into the class identified by CLASSID.

       hash SIZE
	      Hash table size in entries to use. Defaults to 64.

       mask MASK
	      An optional bitmask to binary AND to the packet's tcindex field before use.

       shift SHIFT
	      The number of bits to right-shift a packet's tcindex value before use. If a mask has been set, masking is done before shifting.

       pass_on
	      If this flag is set, failure to find a class for the resulting ID will make the filter fail and lead to the next filter  being  con-
	      sulted.

       fall_through
	      This  is	the  opposite  of  pass_on  and the default. The filter will classify the packet even if there is no class present for the
	      resulting class ID.

SEE ALSO

       tc(8)

iproute2							    21 Oct 2015 				   Traffic control index filter(8)
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