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Re: Process ID of qx

by virtualsue (Vicar)
on Mar 05, 2007 at 09:43 UTC ( #603182=note: print w/replies, xml ) Need Help??


in reply to Process ID of qx

From within the same program? No, not really. qx/backticks works much like system, in that the execution of your program stops while the command in qx() is executed. When your program resumes execution, the qx() subprocess is gone. See perlop for greater detail on how it works. If you want to spawn child processes in a more flexible, asynchronous way, start by reading fork. Threads, Multi-Processing, and Inter-Process Communication (in Tutorials) provides some interesting research material.

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[ambrus]: Corion: Maybe I'm not explaining the situation clearly enough, maybe I'm just wrong and he's right and we can compute that data,
[ambrus]: but hopefully he just wants to think it through himself his way and understand why it's impossible rather than blindly accept my argument.
choroba quickly peeps in from a café
[1nickt]: Good morning Monks of the world!
[Corion]: ambrus: Yeah, hopefully it's that
[1nickt]: I am stumped, maybe someone brainy can clear my mind?
[1nickt]: This code does what I expect on the CLI: perl -wE 'sub x { 0 and 1 } say x()'
[1nickt]: (prints "0")

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