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comamnds running interactively, failed in script wrigint

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Top Forums Shell Programming and Scripting comamnds running interactively, failed in script wrigint
# 1  
Old 09-25-2012
comamnds running interactively, failed in script wrigint
Hi all,
I am trying to run these commands in shell script, but there seem to be some mistake. Somehow it is not accepting the last important comamnd "eval `scram runtime -sh`". However, when I try them interactively, it works all fine.
Code:
[pooja04@cmslpc07 v6]$ SOURCEPATH=/uscms_data/d3/pooja04/CMSSW_5_3_3_patch2/src/ElectroWeakAnalysis/MultiBosons/test/
[pooja04@cmslpc07 v6]$ cd $SOURCEPATH
[pooja04@cmslpc07 test]$  eval `scram runtime -sh`

SCRIPT
====
Code:
SOURCEPATH=/uscms_data/d3/pooja04/CMSSW_5_3_3_patch2/src/ElectroWeakAnalysis/MultiBosons/test/

SetEnv () {
    SCRIPT=`readlink -f $0`

    SCRIPTPATH=`dirname $SCRIPT`
    cd $SOURCEPATH
    echo  $SOURCEPATH
    eval `scram runtime -sh`
    cd $SCRIPTPATH
}

any piece of hint is appreciable.

Thanks
# 2  
Old 09-25-2012
You cannot depend on $0. It may be an absolute path, relative path, or no path depending on how the program is run.
# 3  
Old 09-25-2012
hi corona,
I did not understand. I have tested that piece of code. It just cd in the current working directory.
# 4  
Old 09-25-2012
What's the output of scram runtime -sh ? Is it different in the script or from the command line?
# 5  
Old 09-25-2012
Quote:
Originally Posted by RudiC
What's the output of scram runtime -sh ? Is it different in the script or from the command line?

Hi RudiC,
I have to execute it to set the correct working environment. A simple test to check it its working is following
Code:
SOURCE=/uscms_data/d3/pooja04/CMSSW_5_3_3_patch2/src/ElectroWeakAnalysis/MultiBosons/test/
[cmslpc@test]$ cd $SOURCEPATH
[cmslpc@test]$ eval `scram runtime -sh`
[cmslpc@test]$ root -l 
root [0]

So after execution of that command, it recognize the ROOT.

While with my script, it give the following message:

script.sh
Code:
#!/bin/bash                                                                                                                                           
date

SOURCE=/uscms_data/d3/pooja04/CMSSW_5_3_3_patch2/src/ElectroWeakAnalysis/MultiBosons/test/

SetEnv () {
    SCRIPT=`readlink -f $0`
    SCRIPTPATH=`dirname $SCRIPT`
    cd $SOURCEPATH
    echo  $SOURCEPATH
    eval `scram runtime -sh`
    cd $SCRIPTPATH
}

if  [ "$1" = "setenv" ]; then
    SetEnv
    exit 0
fi

Execution:
Code:
[cmslpc@test]$ ./script.sh  setenv
Tue Sep 25 15:21:48 CDT 2012
/uscms_data/d3/pooja04/CMSSW_5_3_3_patch2/src/ElectroWeakAnalysis/MultiBosons/test/
[cmslpc@test]$ root -l
-bash: root: command not found
[cmslpc@test]$


Thanks,
# 6  
Old 09-25-2012
Quote:
Originally Posted by nrjrasaxena
hi corona,
I did not understand. I have tested that piece of code. It just cd in the current working directory.
You've tested it in your home dir, by running it in a manner where $0 can be depended on.

Except, you can't depend on $0. When something that's not you runs it, especially automatic things like cron and so forth, you have no idea what your current dir, and the contents of $0, are going to be. It might start in / with a useless $0 like -bash or something. Or it might give an absolute path you weren't expecting. etc. I keep telling people not to do this but until it breaks down like this, they never understand why.

Try typing echo $0 into your shell for example. I get -bash. That's not any sort of directory.
# 7  
Old 09-25-2012
Quote:
Originally Posted by Corona688
You've tested it in your home dir, by running it in a manner where $0 can be depended on.

Except, you can't depend on $0. When something that's not you runs it, especially automatic things like cron and so forth, you have no idea what your current dir, and the contents of $0, are going to be. It might start in / with a useless $0 like -bash or something. Or it might give an absolute path you weren't expecting. etc. I keep telling people not to do this but until it breaks down like this, they never understand why.

Try typing echo $0 into your shell for example. I get -bash. That's not any sort of directory.

I just tested that piece of code as script like this [1] and the output is [2] just as I want it to be.
It take me back to my working directory.

[1]
Code:
SetEnv () {
    SCRIPT=`readlink -f $0`
    echo $SCRIPT
    SCRIPTPATH=`dirname $SCRIPT`
    cd $SOURCEPATH
    echo  $SOURCEPATH
    eval `scram runtime -sh`
    cd $SCRIPTPATH
    echo $SCRIPTPATH
}

[2]
Code:
[pooja04@cmslpc17 v6]$ ./script.sh  setenv
Tue Sep 25 15:33:30 CDT 2012
/uscms/home/pooja04/script/AnalysisCode/Code42012/v6/Script4JobSubmit.sh
/uscms_data/d3/pooja04/CMSSW_5_3_3_patch2/src/ElectroWeakAnalysis/MultiBosons/test/
/uscms/home/pooja04/script/AnalysisCode/Code42012/v6
[pooja04@cmslpc17 v6]$
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