From: Sascha Wildner <saw@online.de>
Date: Sun, 1 Jul 2012 20:41:44 +0000 (+0200)
Subject: Add a DB_COMMAND(9) manual page (adapted from FreeBSD).
X-Git-Tag: v3.2.0~727
X-Git-Url: https://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/24b52616fbe0af6f2905c19e79072a3736f0d43f

Add a DB_COMMAND(9) manual page (adapted from FreeBSD).
---

diff --git a/share/man/man9/DB_COMMAND.9 b/share/man/man9/DB_COMMAND.9
new file mode 100644
index 0000000000..2f9adf5b37
--- /dev/null
+++ b/share/man/man9/DB_COMMAND.9
@@ -0,0 +1,106 @@
+.\"-
+.\" Copyright (c) 2008 Guillaume Ballet
+.\" 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: src/share/man/man9/DB_COMMAND.9,v 1.6 2012/05/20 16:43:47 gjb Exp $
+.\"
+.Dd July 1, 2012
+.Dt DB_COMMAND 9
+.Os
+.Sh NAME
+.Nm DB_COMMAND ,
+.Nm DB_SHOW_COMMAND
+.Nd Extends the ddb command set
+.Sh SYNOPSIS
+.In ddb/ddb.h
+.Fo DB_COMMAND
+.Fa command_name
+.Fa command_function
+.Fc
+.Fn DB_SHOW_COMMAND "command_name" "command_function"
+.Sh DESCRIPTION
+The
+.Fn DB_COMMAND
+macro adds
+.Fa command_name
+to the list of top-level commands.
+Invoking
+.Fa command_name
+from ddb will call
+.Fa command_function .
+.Pp
+The
+.Fn DB_SHOW_COMMAND
+is roughly equivalent to
+.Fn DB_COMMAND
+but in this case,
+.Fa command_name
+is a sub-command of the ddb
+.Sy show
+command.
+.Pp
+The general command syntax:
+.Cm command Ns Op Li \&/ Ns Ar modifier
+.Ar address Ns Op Li , Ns Ar count ,
+translates into the following parameters for
+.Fa command_function :
+.Bl -tag -width Fa -offset indent
+.It Fa addr
+The address passed to the command as an argument.
+.It Fa have_addr
+A boolean value that is true if the addr field is valid.
+.It Fa count
+The number of quad words starting at offset
+.Fa addr
+that the command must process.
+.It Fa modif
+A pointer to the string of modifiers.
+That is, a series of symbols used to pass some options to the command.
+For example, the
+.Sy examine
+command will display words in decimal form if it is passed the modifier "d".
+.El
+.Sh EXAMPLE
+In your module, the command is declared as:
+.Bd -literal
+DB_COMMAND(mycmd, my_cmd_func)
+{
+	if (have_addr)
+		db_printf("Calling my command with address %p\en", addr);
+}
+.Ed
+.Pp
+Then, when in ddb:
+.Bd -literal
+.Bf Sy
+db> mycmd 0x1000
+Calling my command with address 0x1000
+db>
+.Ef
+.Ed
+.Sh "SEE ALSO"
+.Xr ddb 4
+.Sh AUTHOR
+This manual page was written by
+.An Guillaume Ballet Aq gballet@gmail.com .
diff --git a/share/man/man9/Makefile b/share/man/man9/Makefile
index f7aa47d4e7..a795c07e49 100644
--- a/share/man/man9/Makefile
+++ b/share/man/man9/Makefile
@@ -35,6 +35,7 @@ MAN=	accept_filter.9 \
 	copy.9 \
 	crit_enter.9 \
 	crypto.9 \
+	DB_COMMAND.9 \
 	DECLARE_MODULE.9 \
 	DELAY.9 \
 	devclass.9 \
@@ -396,6 +397,7 @@ MLINKS+=crypto.9 crypto_dispatch.9 \
 	crypto.9 crypto_unblock.9 \
 	crypto.9 crypto_unregister.9 \
 	crypto.9 crypto_unregister_all.9
+MLINKS+=DB_COMMAND.9 DB_SHOW_COMMAND.9
 MLINKS+=devclass_add_driver.9 devclass_delete_driver.9 \
 	devclass_add_driver.9 devclass_find_driver.9
 MLINKS+=device_add_child.9 device_add_child_ordered.9