Anybody know of a way in ruby to #waitpid on a non child process?
irb(main):001:0> Process.waitpid 32550
Errno::ECHILD: No child processes
[this is possible in doze with the win32-process gem, wondering about
linux now].
Thanks!
-r
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It seems unlikely in general -- waitpid, in POSIX land, really is specific
to your children.
Usually, the idiom is to send them signal 0 until it fails.
-s
On 2009-12-17, Roger Pack <rogerpack2005@gmail.com> wrote:
Anybody know of a way in ruby to #waitpid on a non child process?
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Anybody know of a way in ruby to #waitpid on a non child process?
It seems unlikely in general -- waitpid, in POSIX land, really is
specific
to your children.Usually, the idiom is to send them signal 0 until it fails.
Excellent suggestion.
I have created a gem that does just that.
$ gem install wait_pid
provides you with this ruby code
require 'wait_pid'
WaitPid.wait_pid 1234
and this binary command
$ wait_pid pid_number
Works in both windows and linux.
Cheers!
-r
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