Re: Background processes with Cygwin

[Peter Farley]

--- On Fri, 4/3/09, Jeff Irwin jeffrosq...@hotmail.com wrote:

 From: Jeff Irwin jeffrosq...@hotmail.com
 Subject: Background processes with Cygwin
 To: cygwin-xfree@cygwin.com
 Date: Friday, April 3, 2009, 2:48 PM
Snipped 
 The window will stay up for a few minutes and then go away
 and the script that was running is now dead.  
  
 I am not an expert by any means so any help regardless of
 elementary is appreciated.  I know I am not the first
 squirrel to try to crack this nut so I figured I would toss
 this out in hopes some “big brain” would take notice and
 pity.

PMFJI here, but if you log out of Cygwin, then the Cygwin process terminates.  
Why would you think that a process started under Cygwin could survive the 
termination of Cygwin?  That just doesn't make sense, even to this raw newbie.  
Among other things, the whole *ix environment that Cygwin provides would be 
gone, so how could your process possibly continue?  This isn't real *ix, it's 
*ix facilities provided under the control of another quite different (and 
generally more hostile) OS environment.

Maybe I'm missing something crucial in my understanding of how Cygwin and 
Windows operate.  If so, I'd appreciate a cure for my ignorance.

Peter





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Re: Background processes with Cygwin

[Matt Wozniski]

http://www.cygwin.com/acronyms/#PCYMTNQREAIYR

On Sat, Apr 4, 2009 at 9:50 PM, Peter Farley x...@xxx.xxx wrote:

 --- On Fri, 4/3/09, Jeff Irwin wrote:

Don't quote headers like this.  It's not useful to anyone, and it
feeds the spammers.

 From: Jeff Irwin x...@xxx.xxx
 Subject: Background processes with Cygwin
 To: x...@xxx.xxx
 Date: Friday, April 3, 2009, 2:48 PM
 Snipped

http://www.cygwin.com/acronyms/#PCYMTWLL - Reformatted

 PMFJI here, but if you log out of Cygwin, then the Cygwin process terminates.
 Why would you think that a process started under Cygwin could survive the
 termination of Cygwin?  That just doesn't make sense, even to this raw
 newbie.

You're missing something big.  Cygwin isn't a process.  It's a DLL that
provides a UNIX-like environment.  You don't terminate cygwin, you terminate
a shell that's using the Unix emulation provided by cygwin1.dll.

 Among other things, the whole *ix environment that Cygwin provides would be
 gone, so how could your process possibly continue?  This isn't real *ix,
 it's *ix facilities provided under the control of another quite different
 (and generally more hostile) OS environment.

The *ix facilities are provided by a DLL, not by a process, and the
applications can continue running after the shell exits, just like in any other
*ix - the DLL didn't go away, after all.

 Maybe I'm missing something crucial in my understanding of how Cygwin and
 Windows operate.  If so, I'd appreciate a cure for my ignorance.

Hopefully this clears things up.  Unfortunately, I'm not sure why things aren't
working for the OP.  In any event, switching to the main cygwin list instead of
the cygwin-xfree list (which is only for X11 related issues) would probably
help get him the help he needs.

~Matt

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