Front page | perl.perl5.porters |
Postings from April 2007
Jan Dubois wrote: > On Wed, 18 Apr 2007, Steve Hay wrote: >> Jan Dubois wrote: >>> Therefore `kill(15, undef)` should send signal 15 to all processes >>> in the current process group, including the process issuing the >>> kill() call itself. >> Is kill(15, $pid) supposed to work on Windows? I find that it has no >> effect (at least when $pid is another perl.exe process). > > It works for me (see sample at the end of the message): > > D:\tmp>perl int.pl > cmd=d:\perl820\bin\perl.exe -x int.pl > 5032 pid=4600 > 4332 starting > 5032 kill=1 > Terminating on signal SIGBREAK(21) > 5032 done > > You'll notice that SIGTERM(15) is mapped to SIGBREAK(21) on Windows. I get the same result as you using your test program, but I still have two problems or misunderstandings. Firstly, what I was trying (and which still doesn't work) is to start a perl.exe in one command prompt and note its PID, e.g. >perl -le "print $$; sleep 60" 2508 and then try to kill it using a perl.exe in another command prompt: perl -e "kill 15, 2508" I expected that to kill the first perl.exe (PID 2508), but it doesn't. Trying to kill the cmd.exe parent of PID 2508 instead (like your program does) also doesn't work. Of course, your program is different in that the perl.exe (and its parent cmd.exe) being killed is a child of the perl.exe that is trying to kill it, whereas I'm playing with two separate process trees. Is this expected behaviour? Secondly, if I change the "kill 15, $pid" in your program to "kill 15, undef" instead then I was expecting the whole process tree to be killed, including the perl.exe that is issuing the kill(), as per your comment quoted at the very top of this email. However, I still find that only the cmd.exe and its child perl.exe get killed, and the top-level perl.exe that issued the kill() hangs around for another 5 seconds until it says "done" and exits. This doesn't seem to be what you suggested would happen, unless I've misunderstood you. --Thread Previous | Thread Next