Scripting troubles

Reegz · 02-09-2007, 03:10 AM

Hi guys,

I seem to have hit a wall. What I am trying to do is a listing of all process, grep for java processes and then return only the command being used and its arguments.

eg:

Code:

# ps afx | grep java
10045 pts/1    S      0:00          \_ grep java
18772 ?        S    195:24 /usr/java/j2sdk1.4.2_05/bin/java org.hsqldb.Server -database.0 file:/home/jboss/Qflex/bin/hsqldb/data/qflex -dbname.0 qflex

In the extract above, I only want to return this bit :

Code:

/usr/java/j2sdk1.4.2_05/bin/java org.hsqldb.Server -database.0

I've tried these (and many other) commands

Code:

ps afx | grep java |  tr -d ' ' | awk '{ for (i=0;i<length($0);i++) { if  ($i ~ "/user/") {print substr($i, index("user", $i), length($i)) }  } }'

ps -ef | grep java | awk '{ for (i=0;i<length($0);i++) { if  ($i ~ "/java/") {print substr($0, i, length) }  } }'

 ps -ef | grep java | awk BEGIN { for ( i=0;i>length;i++) { if ( $i == "\/") {print substr($i,i,length) }  } exit }

Any help would be greatly appreciated.

Thanks

unSpawn · 02-09-2007, 04:55 AM

What I am trying to do is a listing of all process, grep for java processes and then return only the command being used and its arguments.
In your example you want only *part* of the arguments shown. The problem is I don't know *why*, so showing only the first three args is in no way a generic "solution". If your platform has 'pgrep' try to use it. It's a combo of 'ps' and 'grep' as the name suggests. With pgrep you can "anchor" your simple globbing on each part of the full argument line (except on Solaris). You can choose a "generic" anchor like the "java" line below to catch all processes using "/usr/java/j2sdk1.4.2_05/bin/java" or a more unique anchor like the "qflex" one:

Code:

pgrep -lf "/usr/java/j2sdk1.4.2_05/bin/java" | awk '{print $2, $3, $4}'
pgrep -lf '/*/qflex' | awk '{print $2, $3, $4}'

unless you mean select *and* the first three arguments conforming to be say one of "/java", "org." or "-datab":

Code:

pgrep -lf "/usr/*/java" | while read args; do
 args=(${args}); for ((i=0;i<${#args[@]};i++)); do
  case "${args[$i]}" in */java|org.*|-datab*) arglist="${arglist} "${args[$i]}"";;
  esac; done; echo $arglist; 
done