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Full Discussion: set variable to command output
Top Forums Shell Programming and Scripting set variable to command output Post 302434671 by stuc on Sunday 4th of July 2010 01:38:38 PM
Old 07-04-2010
SOLVED: set variable to command output
I'm hoping you guys can help me out here. I've been trying different methods to try and get what IW as hoping would be a fairly simple script but has turned into a pain.

Bit of background - I am writing a script to check values in certain failes to ensure they are corerct. I'm runnign this on a Citrix Netscaler which is based on FreeBSD.

The problem I'm having is passing the output of a command into a variable.

currect script thats failing:

Code:
CVer="9,2,45,7"
 
RunningStore="/netscaler/ns_gui"
rFServicesCVer=$ cat $RunningStore/vpns/f_services.html | grep "var clientversion"
 
if [ $rFServicesCVer = "var clientversion=$CVer" ]
then
echo $runningpath/f_services.html contains the correct value
else
echo $runningpath/f_services.html contains the incorrect value
fi

When I run this script the $rFServicesCVer does not appear to get set

tested this by putting an echo before the if and I got the following output

Code:
if [ = var clientversion=9,2,45,7

if I echo the variable above as a test that the variable is set and I get nothing.

what is strange is when the script runs and the $rFServicesCVer is edclaired it seems to run the command and output the correct value so it's as if it's running the command rather then setting it as a variable.

any help much appreciated - if what I've written doesnt make sense let me know as I may not have explained it very well.

Thanks
Last edited by stuc; 07-04-2010 at 03:31 PM..
 

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LEARN ABOUT XFREE86

truncate

TRUNCATE(1)							   User Commands						       TRUNCATE(1)

NAME

       truncate - shrink or extend the size of a file to the specified size

SYNOPSIS

       truncate OPTION... FILE...

DESCRIPTION

       Shrink or extend the size of each FILE to the specified size

       A FILE argument that does not exist is created.

       If  a  FILE  is	larger than the specified size, the extra data is lost.  If a FILE is shorter, it is extended and the extended part (hole)
       reads as zero bytes.

       Mandatory arguments to long options are mandatory for short options too.

       -c, --no-create
	      do not create any files

       -o, --io-blocks
	      treat SIZE as number of IO blocks instead of bytes

       -r, --reference=RFILE
	      base size on RFILE

       -s, --size=SIZE
	      set or adjust the file size by SIZE bytes

       --help display this help and exit

       --version
	      output version information and exit

       The SIZE argument is an integer and optional unit (example: 10K is 10*1024).  Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,... (pow-
       ers of 1000).

       SIZE  may also be prefixed by one of the following modifying characters: '+' extend by, '-' reduce by, '<' at most, '>' at least, '/' round
       down to multiple of, '%' round up to multiple of.

AUTHOR

       Written by Padraig Brady.

REPORTING BUGS

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report truncate translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2017 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       dd(1), truncate(2), ftruncate(2)

       Full documentation at: <http://www.gnu.org/software/coreutils/truncate>
       or available locally via: info '(coreutils) truncate invocation'

GNU coreutils 8.28						   January 2018 						       TRUNCATE(1)
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