Re: just not getting it...

[James Henstridge <james daa com au>]

Clancy, Shane W. wrote:

> all,
> i am working on the same concept i mentioned in my recent mail (application
> crash upon fork() June 27, 2002), except i have realized that it is not the
> fork() that is killing my app; at this point it appears to be inserting text
> from a file into my gui.  i have written a small program to test what i want
> to do, and am including it here in the hopes that someone can tell me where
> i'm going wrong.  in a nutshell, what i would like this program to do is:
> 1. fork two child processes that pull data from the gui and put it into
> individual files.
> 2. after catching the last SIGCHLD, the parent should assemble the
> childrens' files into one.
> 3. finally, the parent should display the data in the gui.
>
> so far, i am making it past #1 & #2, but am getting a 'broken pipe' error
> before the data is displayed. any help would be appreciated.  
>  
Try changing the exit(0); call performed by the child to _exit(0); (note 
the underscore).

On exit(), various cleanups are performed.  Included in this cleanup is 
shutting down the X connection, which is bad as the two processes are 
sharing the connection.  Calling _exit() will exit the process without 
this cleanup.

In future, try cutting your example down to a minimal test case of the 
bug.  More people will be willing to help you that way.  This is 
especially important when filing bugs in bugzilla.

James.

--
Email: james daa com au              | Linux.conf.au 2003 Call for Papers out
WWW:   http://www.daa.com.au/~james/ |   http://conf.linux.org.au/cfp.html