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Re: Troubles when processes try to access to a char device

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Willy <gruppi@willygroup.org> writes:

> I'm building a multi process application under Linux.
>
> In the main process I initialize a char device and put is file
> descriptor in a variable dev_fd in the shared memory area.

This can't work: a file descriptor is an index into a process-local
table of open files. It makes no sense to share descriptors between
processes.

BTW, this has absolutely nothing to do with the C++ language. Please
direct your questions to a forum dedicated to basic unix programming.

-- Alain.

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Thread

Troubles when processes try to access to a char device Willy <gruppi@willygroup.org> - 2012-02-27 08:58 +0100
  Re: Troubles when processes try to access to a char device gwowen <gwowen@gmail.com> - 2012-02-27 05:19 -0800
    Re: Troubles when processes try to access to a char device Willy <gruppi@willygroup.org> - 2012-02-27 14:41 +0100
      Re: Troubles when processes try to access to a char device gwowen <gwowen@gmail.com> - 2012-02-27 07:08 -0800
        Re: Troubles when processes try to access to a char device Willy <gruppi@willygroup.org> - 2012-02-27 16:42 +0100
          Re: Troubles when processes try to access to a char device gwowen <gwowen@gmail.com> - 2012-02-27 09:29 -0800
          Re: Troubles when processes try to access to a char device Dan Oxender <d?n.oxe????@gmail.com> - 2012-02-28 09:06 -0700
  Re: Troubles when processes try to access to a char device Alain Ketterlin <alain@dpt-info.u-strasbg.fr> - 2012-02-27 14:38 +0100

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