Check whether input is numeric Post: 302879005

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Top Forums Shell Programming and Scripting Check whether input is numeric Post 302879005 by infinitydon on Tuesday 10th of December 2013 05:02:05 AM

12-10-2013

Registered User

Check whether input is numeric

Hello there, find below for my code first:

Code:

$pdp_asaba=`cat /tmp/temp_total | grep asaba | sed 's/[^0-9]*//g'`
if [[ ! $pdp =~ [0-9] ]]
then pdp_asaba=0
fi
$pdp_abuja=`cat /tmp/temp_total | grep abuja | sed 's/[^0-9]*//g'`
if [[ ! $pdp =~ [0-9] ]]
then pdp_abuja=0
fi
$pdp_ojota=`cat /tmp/temp_total | grep ojota | sed 's/[^0-9]*//g'`
if [[ ! $pdp =~ [0-9] ]]
then pdp_ojota=0
fi

What i want is that if the output of cat is not a numeric number, it should give it a value of ZERO but if it is a number then it should continue...

But with the above code i keep getting some "Command Not Found" error:

+ [[ ! 880035 =~ [0-9] ]]
++ cat /tmp/temp_total
++ grep abuja
++ sed 's/[^0-9]*//g'
+ =925605
pdp_total.sh: line 23: =925605: command not found

I know the conditional statement is incomplete, will appreciate your inputs.

infinitydon

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zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)