svn commit: r221398 - head/share/man/man9
Andrey V. Elsukov
ae at FreeBSD.org
Tue May 3 18:55:16 UTC 2011
Author: ae
Date: Tue May 3 18:55:16 2011
New Revision: 221398
URL: http://svn.freebsd.org/changeset/base/221398
Log:
Document make_dev_alias_p().
MFC after: 2 weeks
Modified:
head/share/man/man9/make_dev.9
Modified: head/share/man/man9/make_dev.9
==============================================================================
--- head/share/man/man9/make_dev.9 Tue May 3 18:54:18 2011 (r221397)
+++ head/share/man/man9/make_dev.9 Tue May 3 18:55:16 2011 (r221398)
@@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd October 24, 2010
+.Dd May 03, 2011
.Dt MAKE_DEV 9
.Os
.Sh NAME
@@ -33,6 +33,7 @@
.Nm make_dev_credf ,
.Nm make_dev_p ,
.Nm make_dev_alias ,
+.Nm make_dev_alias_p ,
.Nm destroy_dev ,
.Nm destroy_dev_sched ,
.Nm destroy_dev_sched_cb ,
@@ -54,6 +55,8 @@ and DEVFS registration for devices
.Fn make_dev_p "int flags" "struct cdev **cdev" "struct cdevsw *devsw" "struct ucred *cr" "uid_t uid" "gid_t gid" "int mode" "const char *fmt" ...
.Ft struct cdev *
.Fn make_dev_alias "struct cdev *pdev" "const char *fmt" ...
+.Ft int
+.Fn make_dev_alias_p "int flags" "struct cdev **cdev" "struct cdev *pdev" "const char *fmt" ...
.Ft void
.Fn destroy_dev "struct cdev *dev"
.Ft void
@@ -149,6 +152,15 @@ created device will be never destroyed
return an error if the device name is invalid or already exists
.El
.Pp
+Only
+.Dv MAKEDEV_NOWAIT ,
+.Dv MAKEDEV_WAITOK
+and
+.Dv MAKEDEV_CHECKNAME
+values are accepted for the
+.Fn make_dev_alias_p
+function.
+.Pp
The
.Dv MAKEDEV_WAITOK
flag is assumed if none of
@@ -214,6 +226,13 @@ It is an error to call
prior to calling
.Fn make_dev .
.Pp
+.Fn make_dev_alias_p
+function is similar to
+.Fn make_dev_alias
+but it takes a pointer to the resulting
+.Ft *cdev
+as an argument and may return an error.
+.Pp
The
.Fa cdev
returned by
@@ -321,6 +340,8 @@ pointer, otherwise it will return
.Sh ERRORS
The
.Fn make_dev_p
+and
+.Fn make_dev_alias_p
call will fail and the device will be not registered if:
.Bl -tag -width Er
.It Bq Er ENOMEM
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