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Shell Programming and Scripting

Get first column from a huge string ..!!

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Top Forums Shell Programming and Scripting Get first column from a huge string ..!!
# 8  
Old 01-20-2010
what about ?
Code:
cut -d' ' -f1

# 9  
Old 01-20-2010
ak835. Judging from that last post, are you are trying to find out the full program path for PID 29040 only?
If so, part of the problem is that you are processing details for every process when "ps" can give you the details for one process.

I too wonder where the timeout comes from. Are you using a remote shell?

On the surface the simple way to deal with a long string is to put it in a file (rather than an environment variable) and then process it totally in a programming language.
Last edited by methyl; 01-20-2010 at 12:52 PM.. Reason: More
# 10  
Old 01-20-2010
Code:
set $CMD

Will place what you want in the positional parameter $1.

Code:
$ echo $CMD
/global/site/vendor/Vignette7/Content/7_5/java5/jre/bin/java -classpath /global/site/vendor/Vignette7/Content/7_5/lib/vgnconfiglauncher.jar -Dcom.vignette.jvmid=V7CDS1CA1 -DVgnStartupClass=com.vignette.config.agent.Agent -DVgnClassPathFile=/global/site/vendor/Vignette7/Content/7_5/V7CDS1CA1/conf/cfa.classpath -Xms32m -Xmx128m -Dcom.vignette.workingDir=/global/site/vendor/Vignette7/Content/7_5/V7CDS1CA1 -Dcom.vignette.installDir=/global/site/vendor/Vignette7/Content/7_5 -Djavax.xml.parsers.DocumentBuilderFactory=org.apache.xerces.jaxp.DocumentBuilderFactoryImpl -Djavax.xml.parsers.SAXParserFactory=org.apache.xerces.jaxp.SAXParserFactoryImpl -Dorg.apache.commons.logging.Log=com.vignette.logging.CommonsLogger com.vignette.config.launcher.vgnlauncher -c /global/site/vendor/Vignette7/Content/7_5/V7CDS1CA1/conf/cfa.cfg -i /cs/config.cfa-V7CDS1CA1

$ set $CMD

$ echo $1
/global/site/vendor/Vignette7/Content/7_5/java5/jre/bin/java

Regards,
Alister
# 11  
Old 01-20-2010
Code:
$ cmd='/global/site/vendor/Vignette7/Content/7_5/java5/jre/bin/java -classpath /global/site/vendor/Vignette7/Content/7_5/lib/vgnconfiglauncher.jar -Dcom.vignette.jvmid=V7CDS1CA1 -DVgnStartupClass=com.vignette.config.agent.Agent -DVgnClassPathFile=/global/site/vendor/Vignette7/Content/7_5/V7CDS1CA1/conf/cfa.classpath -Xms32m -Xmx128m -Dcom.vignette.workingDir=/global/site/vendor/Vignette7/Content/7_5/V7CDS1CA1 -Dcom.vignette.installDir=/global/site/vendor/Vignette7/Content/7_5 -Djavax.xml.parsers.DocumentBuilderFactory=org.apache.xerces.jaxp.DocumentBuilderFactoryImpl -Djavax.xml.parsers.SAXParserFactory=org.apache.xerces.jaxp.SAXParserFactoryImpl -Dorg.apache.commons.logging.Log=com.vignette.logging.CommonsLogger com.vignette.config.launcher.vgnlauncher -c /global/site/vendor/Vignette7/Content/7_5/V7CDS1CA1/conf/cfa.cfg -i /cs/config.cfa-V7CDS1CA1'

$ echo ${cmd%% *}
/global/site/vendor/Vignette7/Content/7_5/java5/jre/bin/java

# 12  
Old 01-20-2010
Hi.

These are all good solutions, but let's not forget the "dirname" part of the original question Smilie
# 13  
Old 01-20-2010
Hello ,

In perl I would accomplish this,
Code:
perl -wlna -e 'print $F[0]'

Regards,
# 14  
Old 01-20-2010
Computer
why not ?

Code:
cut -f1 -d' ' | cut -f2-40 -d'/'

just increase 40 if the dirname have so many char. SmilieSmilie
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