5

I have a script that basically checks the Java version on the box it's running on and does whatever based on the version number.

My problem is that I want to use the same command on both SunOs and Linux boxes.

The closest I have come to this is...

SunOs:

java -version 2>&1 | nawk -F '"' '/version/ {print $2}'

This gives the expected output of 1.7.0_09

and...

Linux:

java -version 2>&1 | awk -F '"' '/version/ {print $2}'

This gives the expected output of 1.8.0_05

I want to know if I can get the same result, with the same command on the different OS's

  • can you simply alias one of the commands or create a simbolic link, or should this be universal? If so, you could check for the existence of either program and specify the respective command in an if loop. – Fiximan Aug 14 '15 at 8:19
  • just get OS type and use an if, easier than bashing head over something trivial – gwillie Aug 14 '15 at 8:26
  • @gwillie I thought of that, but I wanted a more elegant way. – Pieter van Niekerk Aug 14 '15 at 8:29
10

Here is a portable way :

java -version 2>&1 | PATH=`getconf PATH` awk -F '"' '/version/ {print $2}'

Unlike the usual suggestions that try to guess the correct location depending on the Unix implementation, it uses the getconf PATH command that returns the path to POSIX compliant commands.

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