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Full Discussion: Store a command and execute
Top Forums Shell Programming and Scripting Store a command and execute Post 302668885 by k_manimuthu on Tuesday 10th of July 2012 05:45:42 AM
Old 07-10-2012
Store a command and execute
Hi All,

I am trying to get latest folders based on some condition. The below sample script working fine for me.
Code:
#!/bin/sh 
INSTALLDIR=`pwd`
_UPGRADE_=1
CMD="ls -rtp $INSTALLDIR | grep /"
CMD1="ls -rtp $INSTALLDIR | grep / | grep -v '^server/$'"
 
Get_my_dir(){
   for SDIR in $(ls -rtp $INSTALLDIR | grep /) ; do
   echo source dir : $SDIR
   done
}
 
Get_my_dir

But when i modified the line
Code:
for SDIR in $(ls -rtp $INSTALLDIR | grep /) ; do

to
Code:
for SDIR in $( $CMD) ; do

This gives error. I want prepare my command and store into $CMD variable based on the boolean variable for _UPGRADE_.

Please let me know, how to run the $CMD insist of the hard coded things.

Thanks in advance.
Last edited by Scrutinizer; 07-10-2012 at 07:00 AM.. Reason: code tags instead of quote tags
 

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LEARN ABOUT REDHAT

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  is used to invoke the grep on compress'ed or gzip'ed files. All options specified are passed directly to grep.  If no file is speci-
       fied, 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  zgrep  is invoked as zegrep or zfgrep then egrep or fgrep is used instead of grep.  If the GREP environment variable is set, zgrep uses
       it as the grep program to be invoked. For example:

	   for sh:  GREP=fgrep	zgrep string files
	   for csh: (setenv GREP fgrep; zgrep string files)

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

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

																	  ZGREP(1)
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