--nextPart9408015.ygnZlEOCP5
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline

Simon Perreault wrote:
>On Saturday 15 April 2006 16:33, Ralf Habacker wrote:
>> >>> for example to detect child process termination,
>> >>
>> >> not really.
>>
>> You mean closing of the pipe indicate process termination.
>
>No, the parent receives a SIGCHLD when a child dies. The pipe may be
> closed by the child before its death if it wishes so.

I'm not sure if everyone is discussing the same thing here. (and I'm not=20
sure of myself either).

QProcess creates a pipe with FD_CLOEXEC. That means the pipe is closed=20
when the program is executed. However, if exec* failed, the child process=20
writes something to the pipe and then exits too, closing the pipe.

That's the only way the parent process can tell if the execution succeeded=
=20
or not: by checking if the pipe was written to.

=2D-=20
Thiago Macieira  -  thiago (AT) macieira.info - thiago (AT) kde.org
  thiago.macieira (AT) trolltech.com     Trolltech AS
    GPG: 0x6EF45358                   |  Sandakerveien 116,
    E067 918B B660 DBD1 105C          |  NO-0402
    966C 33F5 F005 6EF4 5358          |  Oslo, Norway

--nextPart9408015.ygnZlEOCP5
Content-Type: application/pgp-signature

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2.2 (GNU/Linux)

iD8DBQBEQ3DXM/XwBW70U1gRAg7cAKDBNZuYqMW3+1H5ruiiAT/U6nGyIQCggM1y
nNlk/UjLf3Quoe3xjyLL84c=
=7oTa
-----END PGP SIGNATURE-----

--nextPart9408015.ygnZlEOCP5--