Re: tcsetpgrp()
- From: Darren Tucker <dtucker@xxxxxxxxxxxxxxxx>
- Date: 27 Jun 2006 14:10:06 GMT
On 2006-06-23, oldhag <oldhag@xxxxxxxxx> wrote:
I am running sshd on a custom QNX environment. If I run an application
that calls tcsetpgrp(0, getpid()), the call fails with errno set to
ENOTTY. There isn't anything untoward that happens otherwise, but I am
wondering if there is some parameter that is not being setup properly.
The tcsetpgrp() function causes breaks on the terminal device to
generate a SIGINT on all processes in the given group, so I am
wondering if there is some conflict with the way ssh handles SIGINT
internally.
Which SSH implementation and version thereof are you running? If it's
OpenSSH, one possibilty is this:
http://bugzilla.mindrot.org/show_bug.cgi?id=1156
On QNX (or at least Neutrino) the pty allocation process apparently
has an unfortunate habit of acquiring the pty it's allocating as sshd's
controlling terminal (this happens on a number of SysV derived systems
including Solaris).
You can try adding -DSSHD_ACQUIRES_CTTY to your CFLAGS to work around
this. In the next release of OpenSSH (4.4), configure will do this
automatically.
--
Darren Tucker (dtucker at zip.com.au)
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4 37C9 C982 80C7 8FF4 FA69
Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.
.
- References:
- tcsetpgrp()
- From: oldhag
- tcsetpgrp()
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