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Old 08-26-2010, 07:34 PM   #1
mukul_d
LQ Newbie
 
Registered: Aug 2007
Posts: 6

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Redirect output of a command to another file inside shell script


Hi,

I am writing a script in which I am using AWK to append to a line in a file and save the file. The command I am using is:
Code:
awk '{s=$0; if ( NR==4 ){s=s ":/usr/java/jdk1.6.0_19/bin" } print s;}' $appName > $appName.new
This works perfectly on the command line. However when I insert the same command in my shell script, the script ignores everything after the first $appName.

The $appName variable is an input to the script.

Similar thing happens when I use SED to replace a piece of text in another file in the same script.

Code:
sed 's/DEV/UAT/g' Properties>Properties.tmp
Again, this works perfectly on command line.

My shell is BASH & I am using Redhat Enterprise Linux.

My entire script is:
Code:
export APPPATH=~/Library/WebObjects/Applications
export APPNAME=$1

# Prepare the deployment env.
prep_env()
{
    typeset appName=$1
    cd ~/Builds
    if [[ -e $appName* ]]; then        rm $appName*
    fi
    curl -O http://smithers.apple.com/hudson/job/RJV-trunk-RJVApps-DEV/com.apple.rjv.app'$'$appName/lastSuccessfulBuild/artifact/com.apple.rjv.app/$appName/1.0.0.0-SNAPSHOT/$appName-1.0.0.0-SNAPSHOT-wod
ocroot.tar.gz

    tar -C ~/Backups/ -xf $appName*
}

append_path()
{
    # Modify the path declaration line in the Application launch file.
    typeset appName=$1
    typeset appPath=$APPPATH
    cd $appPath/$appName.woa
    exec awk '{s=$0; if ( NR==4 ){s=s ":/usr/java/jdk1.6.0_19/bin" } print s;}' $appName > $appName.new
# | mv $appName.tmp $appName | chmod +x $appName
}

modify_prop()
{
    #Modify the Environment Setting in the Properties file from DEV to UAT
    typeset appName=$1
    typeset appPath=$APPPATH/$appName.woa/Contents/Resources
    cd $appPath
    exec sed 's/DEV/UAT/g' Properties>Properties.tmp &&  mv Properties.tmp Properties
}

prep_env $APPNAME
append_path $APPNAME
modify_prop $APPNAME
 
Old 08-26-2010, 10:16 PM   #2
quanta
Member
 
Registered: Aug 2007
Location: Vietnam
Distribution: RedHat based, Debian based, Slackware, Gentoo
Posts: 724

Rep: Reputation: 101Reputation: 101
- How do you call your script?
- No need to use 'exec'
- You can use 'sed -i' to edit inline
 
Old 08-27-2010, 03:36 AM   #3
mukul_d
LQ Newbie
 
Registered: Aug 2007
Posts: 6

Original Poster
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Not using exec

I am actually not using exec. I found suggestions on some other threads on this forum about using exec. But it does not help.

I am not very well conversant with the sed command. I am just using basic features. I will check it out tomorrow.
 
Old 08-27-2010, 04:28 AM   #4
i92guboj
Gentoo support team
 
Registered: May 2008
Location: Lucena, Córdoba (Spain)
Distribution: Gentoo
Posts: 4,083

Rep: Reputation: 403Reputation: 403Reputation: 403Reputation: 403Reputation: 403
Code:
awk '{s=$0; if ( NR==4 ){s=s ":/usr/java/jdk1.6.0_19/bin" } print s;}' $appName > $appName.new
I suggest you to check the value of "$appName" before running awk. For a quick check, 'echo "$appName"' will work.
 
Old 08-27-2010, 03:23 PM   #5
mukul_d
LQ Newbie
 
Registered: Aug 2007
Posts: 6

Original Poster
Rep: Reputation: 0
$appName resolves correctly.

Quote:
I suggest you to check the value of "$appName" before running awk. For a quick check, 'echo "$appName"' will work.
The same command works perfectly on command prompt. The $appName variable is the same used earlier in the script and it resolves correctly.

Also when I run the script in debug mode using -x, it shows $appName resolving to correct parameter. However, it does not show anything after the $appName i.e. the > $appName.new..

Why is this happening?
 
  


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