git: pty - Introduce unix98 ptys
commit c578a286621a95cbcd28c62f7583d70c9bc908b5
Author: Alex Hornung <ahornung@gmail.com>
Date: Tue Sep 1 14:00:15 2009 +0100
pty - Introduce unix98 ptys
* Add the clone base device, /dev/ptmx.
* Add TIOCISPTMASTER ioctl, which returns successfully if the
device is a unix98 pty master.
* Add sysctl kern.pty_debug, default to 0, to control pty debug
info printing.
* Remove old unix98 pty code, which was inactive and inherited
from an initial implementation during devfs development.
* Add userland functions:
- posix_openpt (is equivalent to opening /dev/ptmx)
- ptsname (as described in standard but thread-safe)
- unlockpt (no op)
- grantpt (no op)
* Implement proper permissions for unix98 pty slaves.
Set them to real uid - group "tty" - 0620 for
the slave device, as specified in standard (for grantpt).
Master's permissions don't matter as the device cannot be opened
again.
Set the permissions of the unix98 ptys to be overridable by
setattr() as the old ptys are.
* Use the define UNIX98_PTYS to activate/deactivate the unix98
pty code in tty_pty.c. By default it is enabled.
NOTE: due to the permission handling on cloning of the slave
pty, grantpt is not needed and would only pose a security
risk.
Summary of changes:
include/stdlib.h | 8 +-
lib/libc/gen/Makefile.inc | 2 +-
lib/libc/gen/{fdevname.c => ptsname.c} | 87 +++++++++------
sys/kern/tty_pty.c | 186 ++++++++++++++++++++++++--------
sys/sys/ttycom.h | 1 +
5 files changed, 202 insertions(+), 82 deletions(-)
copy lib/libc/gen/{fdevname.c => ptsname.c} (67%)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/c578a286621a95cbcd28c62f7583d70c9bc908b5
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