$SIG{ALRM} = sub { warn "3 days over!\n"; exit };
alarm(86400 * 3);
[download]

--shmem

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

now i m confused
the above code will kill tests after there days. and it prints messages " 3 days over" and exits
i can also write a code to print final report inside the sub function
if test get over before 3 days then where should i place code to finally create a report.
i mean where to place code to check if test over before 3. should it come after above code or before above code.

$SIG{ALRM} = sub { report(); exit };
alarm(86400 * 3);

# your test code here
...
# at the end, print report
report();

sub report {
    # your reporting code
}
[download]

At the end of your test script you invoke report(). If the script happens to run for three days, the alarm handler will invoke report() and terminate the script.

--shmem

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

this is what i m need to do.i had script which submit tests to unix LSF. its expected that tests will end within 3 days.
but in worse loading it may happen tests dont complete in 3 days, in that case i will set a alarm for 3 days and will kill tests after 3 days.
if tests end with in three days i will create final report log.
i m checking status of servers to find if all tests are done or not using bsub commands.
in short i want
------ see if alarm is not expired ------ see serve load , if server load ==0 , all tests done , create final report. ------ if alam expired kill all tests. hope this explains what i need.

No need for alarm, then. Just write what you want to have.

Place your code which checks the server load into a loop which terminates when the time passed hits the timeout. Exit the loop if conditions for reporting are met. After the loop, do the reporting.

Write your script. If you have questions around it, post it, and ask. See How do I post a question effectively?.

--shmem

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}