Forum: Ruby-core [ruby-trunk - Bug #7082][Open] Process.kill 0 in windows can return spurious success

Issue #7082 has been reported by rogerdpack (Roger Pack).

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Bug #7082: Process.kill 0 in windows can return spurious success
https://bugs.ruby-lang.org/issues/7082

Author: rogerdpack (Roger Pack)
Status: Open
Priority: Normal
Assignee:
Category:
Target version:
ruby -v: ruby 1.9.3p194 (2012-04-20) [i386-mingw32]


>> a = IO.popen('ls "."', 'w')
=> #<IO:fd 4>
>> a.pid
=> 2104
>> Process.kill 0, 2104
=> 1 # should raise an exception since that process is dead now, 
shouldn't it? [it can be checked with GetExitCodeProcess != 
STILL_ACTIVE) ?

Thanks!
-r

Issue #7082 has been updated by rogerdpack (Roger Pack).


I see that the current way in windows somewhat mimic's how it operates 
in Unix (process is a zombie, so still responds to signals).  If so, 
perhaps it would be nice to create a new method

Process.alive?(pid)

that would be useful in certain cases, like checking if a process is 
dead before closing streams to it.

So maybe change this to a feature request, if anybody can confirm the 
above.

Thanks.
-roger-
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Bug #7082: Process.kill 0 in windows can return spurious success
https://bugs.ruby-lang.org/issues/7082#change-29770

Author: rogerdpack (Roger Pack)
Status: Open
Priority: Normal
Assignee:
Category:
Target version:
ruby -v: ruby 1.9.3p194 (2012-04-20) [i386-mingw32]


>> a = IO.popen('ls "."', 'w')
=> #<IO:fd 4>
>> a.pid
=> 2104
>> Process.kill 0, 2104
=> 1 # should raise an exception since that process is dead now, 
shouldn't it? [it can be checked with GetExitCodeProcess != 
STILL_ACTIVE) ?

Thanks!
-r

Issue #7082 has been updated by usa (Usaku NAKAMURA).

Tracker changed from Bug to Feature


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Feature #7082: Process.kill 0 in windows can return spurious success
https://bugs.ruby-lang.org/issues/7082#change-29771

Author: rogerdpack (Roger Pack)
Status: Open
Priority: Normal
Assignee:
Category:
Target version:


>> a = IO.popen('ls "."', 'w')
=> #<IO:fd 4>
>> a.pid
=> 2104
>> Process.kill 0, 2104
=> 1 # should raise an exception since that process is dead now, 
shouldn't it? [it can be checked with GetExitCodeProcess != 
STILL_ACTIVE) ?

Thanks!
-r

Issue #7082 has been updated by mame (Yusuke Endoh).

Status changed from Open to Assigned
Assignee set to usa (Usaku NAKAMURA)
Target version set to next minor


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Feature #7082: Process.kill 0 in windows can return spurious success
https://bugs.ruby-lang.org/issues/7082#change-33672

Author: rogerdpack (Roger Pack)
Status: Assigned
Priority: Normal
Assignee: usa (Usaku NAKAMURA)
Category:
Target version: next minor


>> a = IO.popen('ls "."', 'w')
=> #<IO:fd 4>
>> a.pid
=> 2104
>> Process.kill 0, 2104
=> 1 # should raise an exception since that process is dead now, 
shouldn't it? [it can be checked with GetExitCodeProcess != 
STILL_ACTIVE) ?

Thanks!
-r