From: Jan Beich <jbeich@tormail.org>
To: Glenn Morris <rgm@gnu.org>
Cc: 12040@debbugs.gnu.org, Robert Millan <rmh@freebsd.org>
Subject: bug#12040: 24.1.50; `term' hangs on FreeBSD 10.0-CURRENT without pty(4)
Date: Thu, 16 Aug 2012 05:10:03 -0500 [thread overview]
Message-ID: <1T1x1j-0005QU-RK@internal.tormail.org> (raw)
In-Reply-To: <1StGrf-000La0-Jk@internal.tormail.org>
(cc'ing Robert in case I misread glibc code)
Glenn Morris <rgm@gnu.org> writes:
> Jan Beich wrote:
>
>> A few ways to solve this:
>> - use openpty() in -lutil like darwin
>> - add use posix_openpt() support
>
> Thanks for the patches.
> Do you (or anyone else) have a feeling for which is the best?
I'd go with less wrappers - posix_openpt(). And also use it on netbsd,
dragonfly and probably darwin.
openpty() is implemented via posix_openpt() in libutil on recent freebsd.
posix_openpt() is a syscall on (k)freebsd. And /dev/ptmx only exists if
pty(4) is loaded, not sure how it affects binaries under linuxulator.
> As written the posix_openpt one changes the behaviour on gnu-linux
> platforms to use posix_openpt instead of getpt.
In glibc/linux case getpt() is implemented via posix_openpt():
// sysdeps/unix/sysv/linux/getpt.c
int
__getpt (void)
{
int fd = __posix_openpt (O_RDWR);
if (fd == -1)
fd = __bsd_getpt ();
return fd;
}
In glibc/kfreebsd case getpt() iterates over /dev/ptyXX which won't work
without pty(4) in kernel.
next prev parent reply other threads:[~2012-08-16 10:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-23 11:31 bug#12040: 24.1.50; `term' hangs on FreeBSD 10.0-CURRENT without pty(4) Jan Beich
2012-08-16 6:45 ` Glenn Morris
[not found] ` <1T1tp3-000F13-AB@internal.tormail.org>
2012-08-16 10:10 ` Jan Beich [this message]
2012-08-17 7:21 ` Glenn Morris
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