Ed Schouten 34d1dcf0cc 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)		2008-05-31 14:06:37 +00:00
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devfs.h	Properly lock the vnode around vgone() calls.	2006-10-18 11:17:14 +00:00
devfs_devs.c	VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in	2008-01-13 14:44:15 +00:00
devfs_int.h	Implement the per-open file data for the cdev.	2008-05-21 09:31:44 +00:00
devfs_rule.c	Do not dereference cdev->si_cdevsw, use the dev_refthread() to properly	2008-03-20 16:08:42 +00:00
devfs_vfsops.c	VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in	2008-01-13 14:44:15 +00:00
devfs_vnops.c	Merge back devfs changes from the mpsafetty branch.	2008-05-31 14:06:37 +00:00