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Full Discussion: Removing leading spaces from the variable value.
Top Forums Shell Programming and Scripting Removing leading spaces from the variable value. Post 302357064 by Scrutinizer on Monday 28th of September 2009 03:25:18 PM
Old 09-28-2009
Hi khedu,

I think you have remove all whitespace characters instead of just regular spaces, so instead of:
Code:
polnum=`grep "<PolNumber>" adi99.xml | sed 's:<PolNumber>::;s:</PolNumber>::' | sed 's/^ *\(.*\) *$/\1/'`

try:
Code:
polnum=`grep "<PolNumber>" adi99.xml  | sed 's:<PolNumber>::;s:</PolNumber>::'| sed 's/^[[:space:]]*\(.*\)[[:space:]]*$/\1/'`

or
Code:
polnum=`grep "<PolNumber>" adi99.xml  | sed 's:<PolNumber>[[:space:]]*\(.*\)[[:space:]]*</PolNumber>:\1:'`

or
Code:
polnum=$(sed -n 's:<PolNumber>[[:space:]]*\(.*\)[[:space:]]*</PolNumber>:\1:p adi99.xml)

Last edited by Scrutinizer; 09-28-2009 at 04:48 PM..
 

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LEARN ABOUT PLAN9

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)
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