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 December 10, 2012 .Dt CHECK-PASSWORD.4TH 8 .Os .Sh NAME .Nm check-password.4th .Nd FreeBSD password-checking boot module .Sh DESCRIPTION The file that goes by the name of .Nm is a set of commands designed to either prevent booting or prevent modification of boot options without an appropriately configured password. The commands of .Nm by themselves are not enough for most uses. Please refer to the examples below for the most common situations, and to .Xr loader 8 for additional commands.
p Before using any of the commands provided in .Nm , it must be included through the command:
p .Dl include check-password.4th
p This line is present in
a /boot/loader.4th file, so it is not needed (and should not be re-issued) in a normal setup.
p The commands provided by it are:
p l -tag -width disable-module_module -compact -offset indent t Ic check-password Dual-purpose function that can either protect the interactive boot menu or prevent boot without password (separately).
p First checks .Va bootlock_password and if-set, the user cannot continue until the correct password is entered.
p Next checks .Va password and if-set, tries to c autoboot and only prompts for password on failure or user-interrupt. See .Xr loader.conf 5 for additional information. .El
p The environment variables that effect its behavior are: l -tag -width bootlock_password -offset indent t Va bootlock_password Sets the bootlock password (up to 16 characters long) that is required by c check-password to be entered before the system is allowed to boot. t Va password Sets the password (up to 16 characters long) that is required by c check-password before the user is allowed to visit the boot menu. .El .Sh FILES l -tag -width /boot/check-password.4th -compact t Pa /boot/loader The .Xr loader 8 . t Pa /boot/check-password.4th .Nm itself. t Pa /boot/loader.rc .Xr loader 8 bootstrapping script. .El .Sh EXAMPLES Standard i386
p d -literal -offset indent -compact include /boot/loader.4th check-password .Ed
p Set a password in .Xr loader.conf 5 to prevent modification of boot options:
p d -literal -offset indent -compact password="abc123" .Ed
p Set a password in .Xr loader.conf 5 to prevent booting without password:
p d -literal -offset indent -compact bootlock_password="boot" .Ed .Sh SEE ALSO .Xr loader.conf 5 , .Xr loader 8 , .Xr loader.4th 8 .Sh HISTORY The .Nm set of commands first appeared in .Fx 9.0 . .Sh AUTHORS The .Nm set of commands was written by .An -nosplit .An Devin Teske Aq dteske@FreeBSD.org .