Re^3: Simple way to find on Windows, whether a process is running

From the Active State change log:

Bug Fixes and Changes since build 821

...
kill(0, $pid) was always returning TRUE in build 820 on Windows. It now returning the correct values again (bug 67519).

Upgrade. Works okay on AS 5.8.9:

c:\test>\perl32\bin\perl -le"print $]; print kill 0, $_ for 3844, 4844
+"
5.008009
1
0
[download]

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

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In the absence of evidence, opinion is indistinguishable from prejudice.

Comment on Re^3: Simple way to find on Windows, whether a process is running Download Code

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Re^4: Simple way to find on Windows, whether a process is running by rovf (Priest) on Sep 12, 2011 at 08:54 UTC
Upgrade. Works okay on AS 5.8.9 I'm not sure whether I'll get permission to upgrade (and in this case, I would go straight to 5.12 anyway). Any suggestions how to solve it within 5.8.8? -- Ronald Fischer <ynnor@mm.st>	[reply] [d/l]
Re^5: Simple way to find on Windows, whether a process is running by BrowserUk (Patriarch) on Sep 12, 2011 at 10:02 UTC
Attempt to use Win32::Process`::Open( my $handle, $pid, 0 );` to obtain a handle to the running process. If the call succeeds, it is still running. You could also avoid having to poll the process by using `$handle->Wait( $timeoutms );` to wait until it ends (or the timeout occurs) and then `$handle->Kill( $exitcode )` to kill it if it runs too long. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice.	[reply] [d/l] [select]
Re^5: Simple way to find on Windows, whether a process is running by Anonymous Monk on Sep 12, 2011 at 09:14 UTC
`qx{pslist.exe $pid}`? copy/paste win32_kill into Inline::C? Win32::Process::Info?	[reply]
Re^6: Simple way to find on Windows, whether a process is running by rovf (Priest) on Sep 14, 2011 at 09:25 UTC
An alternative to pslist would be wmic, which comes with Windows (at least from XP and up). However, I wanted to avoid a solution where I had to shell out for this, because it means that I need to filter out the PIDs for the pslist/wmic process (and, perhaps, an interim command shell process). I wanted to avoid Win32::Process::Info too, because of the many problems pointed out in its documentation, but after all, this was the solution I ended up with, because the alternatives were even less attractive. Actually, I personally would prefer upgrading Perl to a version where `kill` works as documented, but this is not feasible at the moment... -- Ronald Fischer <ynnor@mm.st>	[reply] [d/l] [select]