ddb.8 revision 174915
-
Copyright (c) 2007 Robert N. M. Watson
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: head/sbin/ddb/ddb.8 174915 2007-12-26 09:38:22Z rwatson $
.Dd 25 December, 2007 .Dt DDB 8 .Os .Sh NAME .Nm ddb .Nd Configure DDB kernel debugger properties .Sh SYNOPSIS .Nm .Cm script .Ar scriptname .Nm .Cm script .Ar scriptname=script .Nm .Cm scripts .Nm .Cm unscript .Ar scriptname .Sh DESCRIPTION .Nm configures certain aspects of the .Xr DDB 4 kernel debugger from user space that are not configured at compile-time or easily via .Xr sysctl 8 MIB entries. .Sh SCRIPTING .Nm can be used to configure aspects of .Xr DDB 4 scripting from user space; scripting support is described in more detail in .Xr DDB 4 . Each of the debugger commands is available from the command line: l -tag -width indent t Cm script Ar scriptname Print the script named .Ar scriptname . t Cm script Ar scriptname=scriptvalue Define a script named .Ar scriptname ; as many scripts contain characters interpreted in special ways by the shell, it is advisable to enclose .Ar scriptvalue in quotes. t Cm scripts List currently defined scripts. t Cm unset Ar scriptname Delete the script named .Ar scriptname . .El .Sh EXAMPLES The following example defines a script that will execute when the kernel debugger is entered as a result of a break signal: d -literal -offset indent ddb script kdb.enter.break="show pcpu;bt" .Ed
Copyright (c) 2007 Robert N. M. Watson
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: head/sbin/ddb/ddb.8 174915 2007-12-26 09:38:22Z rwatson $
.Dd 25 December, 2007 .Dt DDB 8 .Os .Sh NAME .Nm ddb .Nd Configure DDB kernel debugger properties .Sh SYNOPSIS .Nm .Cm script .Ar scriptname .Nm .Cm script .Ar scriptname=script .Nm .Cm scripts .Nm .Cm unscript .Ar scriptname .Sh DESCRIPTION .Nm configures certain aspects of the .Xr DDB 4 kernel debugger from user space that are not configured at compile-time or easily via .Xr sysctl 8 MIB entries. .Sh SCRIPTING .Nm can be used to configure aspects of .Xr DDB 4 scripting from user space; scripting support is described in more detail in .Xr DDB 4 . Each of the debugger commands is available from the command line: l -tag -width indent t Cm script Ar scriptname Print the script named .Ar scriptname . t Cm script Ar scriptname=scriptvalue Define a script named .Ar scriptname ; as many scripts contain characters interpreted in special ways by the shell, it is advisable to enclose .Ar scriptvalue in quotes. t Cm scripts List currently defined scripts. t Cm unset Ar scriptname Delete the script named .Ar scriptname . .El .Sh EXAMPLES The following example defines a script that will execute when the kernel debugger is entered as a result of a break signal: d -literal -offset indent ddb script kdb.enter.break="show pcpu;bt" .Ed
p The following example will delete the script: d -literal -offset indent ddb unscript kdb.enter.break .Ed .Sh EXIT STATUS .Ex -std .Sh SEE ALSO .Xr DDB 4 , .Xr sysctl 8 .Sh HISTORY .Nm first appeared in .Fx 8.0 . .Sh AUTHORS .An Robert N M Watson .Sh BUGS Ideally, .Nm would not exist, as all pertinent aspects of .Xr DDB 4 could be configured directly via .Xr sysctl 8 .