Redirect output of a command to another file inside shell script

mukul_d · 08-26-2010, 06:34 PM

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

quanta · 08-26-2010, 09:16 PM

- How do you call your script?
- No need to use 'exec'
- You can use 'sed -i' to edit inline

mukul_d · 08-27-2010, 02:36 AM

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.

i92guboj · 08-27-2010, 03:28 AM

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.

mukul_d · 08-27-2010, 02:23 PM

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?