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author | ed <ed@FreeBSD.org> | 2008-05-31 14:06:37 +0000 |
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committer | ed <ed@FreeBSD.org> | 2008-05-31 14:06:37 +0000 |
commit | 06518ce4b19ccd4762d5985970b0e06b71280b56 (patch) | |
tree | db7b3591ac664c72d0ddaef84bd702e5fa57bd58 /games | |
parent | fc25cc1566017a673e82ccb9a80634f5a486c405 (diff) | |
download | FreeBSD-src-06518ce4b19ccd4762d5985970b0e06b71280b56.zip FreeBSD-src-06518ce4b19ccd4762d5985970b0e06b71280b56.tar.gz |
Merge back devfs changes from the mpsafetty branch.
In the mpsafetty branch, PTY's are allocated through the posix_openpt()
system call. The controller side of a PTY now uses its own file
descriptor type (just like sockets, vnodes, pipes, etc).
To remain compatible with existing FreeBSD and Linux C libraries, we can
still create PTY's by opening /dev/ptmx or /dev/ptyXX. These nodes
implement d_fdopen(). Devfs has been slightly changed here, to allow
finit() to be called from d_fdopen().
The routine grantpt() has also been moved into the kernel. This routine
is a little odd, because it needs to bypass standard UNIX permissions.
It needs to change the owner/group/mode of the slave device node, which
may often not be possible. The old implementation solved this by
spawning a setuid utility.
When VOP_SETATTR() is called with NOCRED, devfs_setattr() dereferences
ap->a_cred, causing a kernel panic. Change the de_{uid,gid,mode} code to
allow changes when a->a_cred is set to NOCRED.
Approved by: philip (mentor)
Diffstat (limited to 'games')
0 files changed, 0 insertions, 0 deletions