Thanks very much for all the responses, more than sufficient for playing with.
Cheers, Roger On 24/05/11 10:37, Jim Cheetham wrote: > On Tue, May 24, 2011 at 9:34 AM, Steve Holdoway<[email protected]> > wrote: >> Oldschool... >> echo "Backup starts at: `/bin/date +%H:%M:%S`" > printf is the POSIX-preferred command, as echo has too many different > implementations across different operating systems. Not something that > will bother Roger's example :-) > > And, if you are using a variant on bash, the backticks should be > replaced with $(...) instead -- because they are more visible and > obvious when reading the script, and also allow nested calls. > > If you want to grow your own timing stats, you should collect the date > in a numeric format at the beginning of an operation, and throw it > back at the end ... > > STARTDATE=$(date +%H:%M:%S) > STARTSEC=$(date +%s) > ( ... commands ... ) > FINISHSEC=$(date +%s) > FINISHDATE=$(date +%H:%M:%S) > printf "Started at $STARTDATE\nFinished at $FINISHDATE\nElapsed: > $((FINISHSEC-$STARTSEC)) seconds\n" > > I put a 'sleep 5' in there for a test ... > jim@hex:~/tmp$ ./timing.sh > Started at 10:29:59 > Finished at 10:30:04 > Elapsed: 5 seconds > > However, as Anatoly said, there's already the handy 'time' shell > builtin command, which tells you about an individual command's timing. > jim@hex:~/tmp$ time sleep 5 > > real 0m5.004s > user 0m0.010s > sys 0m0.000s > > For more interesting investigation, 'man time' tells you about the > abilities of the external (non-builtin) /usr/bin/time command. Here > I'll get it to tell me the elapsed time, exit status and command-line > invoked (this turns out to be an easy way to collect exit status > values, instead of looking for $? all the time, BTW) > jim@hex:~/tmp$ /usr/bin/time -f '%E %x %C' sleep 5 > 0:05.00 0 sleep 5 > > I think you'll find something to keep you amused in that lot ... > > -jim > > _______________________________________________ > Linux-users mailing list > [email protected] > http://lists.canterbury.ac.nz/mailman/listinfo/linux-users > _______________________________________________ Linux-users mailing list [email protected] http://lists.canterbury.ac.nz/mailman/listinfo/linux-users
