A signal trap that logs when your script was killed and what other processes were running at that time

trap "echo \"$0 process $$ killed on $(date).\" | tee ${0##*/}_$$_termination.log; echo 'Active processes at the time were logged to ${0##*/}_$$_termination.log'; ps u >> ${0##*/}_$$_termination.log; exit " HUP INT QUIT ABRT TERM STOP
trap is the bash builtin that allows you to execute commands when the current script receives a particular signal. Uses $0 for the script name, $$ for the script PID, tee to output to STDOUT as well as a log file and ps to log other running processes.
Sample Output
./traptest.sh process 11009 killed on Wed Feb 18 12:08:09 PST 2009.
Active processes at the time were logged to traptest.sh_11009_termination.log

1
2009-02-18 20:13:29

What Others Think

I like the concept, but maybe a simpler example to show how to use trap? It took me a minute to realize that the submission was one command that takes in a string and a list of signals. Either way, you definitely taught me new, very useful command! Cheers!
joem86 · 503 weeks and 6 days ago
Sure thing joem86! I posted it because it was something useful that I needed in this particular form, but a simplified example of trap is surely useful to others.
DEinspanjer · 503 weeks and 5 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

You must be signed in to comment.

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands



Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: