Hi i am bit lost with all the layers of regexp and escape characters, so from the code i posted above i specialy want to understand what comes immediately after the F for field separator, so we want a quote so we escape it with the backslash but why is there no space after the -F ? and why is org.apache.coyote.tomcat4.CoyoteConnector placed between the single quote and what are the slashes that are surrounding it ?

Thanks

I don't understand what the getline is doing here, I would normally use that to 'capture' the output of a system command executed by awk

So, I'm going to ignore it here

-F\" # use " as field separator
/string/ # only consider lines that contain 'string'
{print $2} # print field 2
${JBOSS_APP_CFG} # the file you want to process
2>/dev/null # don't display errors ,, pointless if you ask me



further reading https://startpage.com/do/search?q=awk+manual

note , to confuse matters there are various versions of awk
gawk,nawk,mawk

gawk is arguably the 'most powerful' having a much richer feature set

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Thanks, i think the getLine is there so that displays the second filed of the line immediately after th eone containing the tomcat entry string. getLine gets on with the rest of the instruction unlike next.

the getline does nothing here..
https://www.gnu.org/software/gawk/ma...e/Getline.html

and the 2>/dev/null is also pointless
unless ${JBOSS_APP_CFG} doesn’t exist
BUT that should be checked before executing the awk,


Edit, I take that back
I see what it is doing now, it is skipping the matched line and printing field 2 of the next line