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Document the make_dev_alias function.

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This commit is contained in:
Matt Jacob 2001-03-11 20:10:45 +00:00
parent 9cbd039343
commit 792b236965
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=74114
1 changed files with 21 additions and 1 deletions
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22
share/man/man9/make_dev.9
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@ -36,6 +36,8 @@
.Fd #include <sys/conf.h>
.Ft dev_t
.Fn make_dev "struct cdevsw *cdevsw" "int minor" "uid_t uid" "gid_t gid" "int perms" "char *fmt" ...
.Ft dev_t
.Fn make_dev_alias "dev_t pdev" "char *fmt" ...
.Ft void
.Fn destroy_dev "dev_t dev"
.Sh DESCRIPTION
@ -80,12 +82,26 @@ are defined in
.Ed
.Pp
The
.Fn make_dev_alias
function takes the returned
.Fa 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.
and destroys the registration for that device. Do not call
.Fn destroy_dev
on devices that were created with
.Fn make_dev_alias .
.Sh HISTORY
The
.Fn make_dev
@ -93,3 +109,7 @@ and
.Fn destroy_dev
functions first appeared in
.Fx 4.0 .
The function
.Fn make_dev_alias
first appeared in
.Fx 4.1 .