143 lines
4.0 KiB
Groff
143 lines
4.0 KiB
Groff
.\" Copyright (c) 1999 Chris Costello
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd May 27, 2001
|
|
.Os
|
|
.Dt MAKE_DEV 9
|
|
.Sh NAME
|
|
.Nm make_dev ,
|
|
.Nm make_dev_alias ,
|
|
.Nm destroy_dev ,
|
|
.Nm dev_depends
|
|
.Nd manage
|
|
.Vt dev_t Ns 's
|
|
and DEVFS registration for devices
|
|
.Sh SYNOPSIS
|
|
.In sys/param.h
|
|
.In sys/conf.h
|
|
.Ft dev_t
|
|
.Fn make_dev "struct cdevsw *cdevsw" "int minor" "uid_t uid" "gid_t gid" "int perms" "const char *fmt" ...
|
|
.Ft dev_t
|
|
.Fn make_dev_alias "dev_t pdev" "const char *fmt" ...
|
|
.Ft void
|
|
.Fn destroy_dev "dev_t dev"
|
|
.Ft void
|
|
.Fn dev_depends "dev_t pdev" "dev_t cdev"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn make_dev
|
|
function creates a
|
|
.Fa dev_t
|
|
structure for a new device.
|
|
If DEVFS is available, it is also notified of
|
|
the presence of the new device.
|
|
The device will be owned by
|
|
.Va uid ,
|
|
with the group ownership as
|
|
.Va gid ,
|
|
and with the name as specified in
|
|
.Va name .
|
|
The permissions of the file specified in
|
|
.Va perms
|
|
are defined in
|
|
.In sys/stat.h :
|
|
.Pp
|
|
.Bd -literal -offset indent -compact
|
|
#define S_IRWXU 0000700 /* RWX mask for owner */
|
|
#define S_IRUSR 0000400 /* R for owner */
|
|
#define S_IWUSR 0000200 /* W for owner */
|
|
#define S_IXUSR 0000100 /* X for owner */
|
|
|
|
#define S_IRWXG 0000070 /* RWX mask for group */
|
|
#define S_IRGRP 0000040 /* R for group */
|
|
#define S_IWGRP 0000020 /* W for group */
|
|
#define S_IXGRP 0000010 /* X for group */
|
|
|
|
#define S_IRWXO 0000007 /* RWX mask for other */
|
|
#define S_IROTH 0000004 /* R for other */
|
|
#define S_IWOTH 0000002 /* W for other */
|
|
#define S_IXOTH 0000001 /* X for other */
|
|
|
|
#define S_ISUID 0004000 /* set user id on execution */
|
|
#define S_ISGID 0002000 /* set group id on execution */
|
|
#define S_ISVTX 0001000 /* sticky bit */
|
|
#ifndef _POSIX_SOURCE
|
|
#define S_ISTXT 0001000
|
|
#endif
|
|
.Ed
|
|
.Pp
|
|
The
|
|
.Fn make_dev_alias
|
|
function takes the returned
|
|
.Ft dev_t
|
|
from
|
|
.Fn make_dev
|
|
and makes another (aliased) name for this device.
|
|
It is an error to call
|
|
.Fn make_dev_alias
|
|
prior to calling
|
|
.Fn make_dev .
|
|
.Pp
|
|
The
|
|
.Fn destroy_dev
|
|
function takes the returned
|
|
.Fa dev_t
|
|
from
|
|
.Fn make_dev
|
|
and destroys the registration for that device.
|
|
Do not call
|
|
.Fn destroy_dev
|
|
on devices that were created with
|
|
.Fn make_dev_alias .
|
|
.Pp
|
|
The
|
|
.Fn dev_depends
|
|
function establishes a parent-child relationship between two devices.
|
|
The net effect is that a
|
|
.Fn destroy_dev
|
|
of the parent device will also result in the destruction of the
|
|
child device(s),
|
|
if any exist.
|
|
A device may simultaneously be a parent and a child,
|
|
so it is possible to build a complete hierarchy.
|
|
.Sh SEE ALSO
|
|
.Xr devfs 5
|
|
.Sh HISTORY
|
|
The
|
|
.Fn make_dev
|
|
and
|
|
.Fn destroy_dev
|
|
functions first appeared in
|
|
.Fx 4.0 .
|
|
The function
|
|
.Fn make_dev_alias
|
|
first appeared in
|
|
.Fx 4.1 .
|
|
The function
|
|
.Fn dev_depends
|
|
first appeared in
|
|
.Fx 5.0 .
|