CODEWITHSUNDEEP
bashunixawk
user1518487
user1518487

Reputation: 23

Text parse using awk or sed in UNIX. Extract a port number

I have to extract a certain port number piped from a process status (ps) command and am not quite sure how to get it.

For example, if I had this line (ps -ef | grep "blahblahblah"):

xxremote -xcom.xx.management.xremote.port=9999 -xcom.xx.management.xxxremote.ssl=false

How can I extract the number "9999"? NOTE: This is one part of a very LONG line, and I cannot use, for example, awk, to count how many fields after the "=" sign. The number of = signs will change.

I tried using the cut command but I only know how to use it with single character delimiters which isn't what I need. I was thinking maybe awk or sed would do the trick? I am not to familiar with them. Thank you very much for the help

ps -ef | grep "blahblahblah" " | awk .... (or sed)

UPDATE: Clarified that the port number needs to be extracted form a single long line of text, and that using an awk command is not required.

Upvotes: 2

Views: 2994

Answers (3)

Dennis Williamson
Dennis Williamson

Reputation: 360685

ps -ef | sed -n '/blahblahblah/s/^.*port=\([[:digit:]]\+) .*/\1/p'

Upvotes: 3

David W.
David W.

Reputation: 107090

Must you use Awk? sed would be a better choice...

Oh well...

ps -ef | awk '/blahblahblah/ {
    sub(".*port=", "")
    sub(" .*", "")
    print $0
}'

The sub(a, b) command in awk substitutes the regular expression a with string b (which happens to be blank in my case. It takes $0 which represents the line returned.

As I said, sed would be simpler:

ps -ef | sed -n '/blahblahblah/s/^.*port=\([^ ]*\).*/\1/p'

Notice I'm using sed to select the line blahblahblah and to do the substitution.

Upvotes: 1

Levon
Levon

Reputation: 143152

This will do it:

(updated to filter only lines that contain xremote.port= in case the data isn't filtered yet)

ps -elf | awk -F= '/xremote.port=/{print $2}' | awk '{print $1}'

The first awk command splits the line on = resulting in the 2nd field being:

9999 -xcom.xx.management.xxxremote.ssl

the second awk command grabs the first field of this which is your number.

9999

Upvotes: 1

Related Questions