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chroot(1m) [opensolaris man page]

chroot(1M)						  System Administration Commands						chroot(1M)

chroot - change root directory for a command SYNOPSIS
/usr/sbin/chroot newroot command DESCRIPTION
The chroot utility causes command to be executed relative to newroot. The meaning of any initial slashes (/) in the path names is changed to newroot for command and any of its child processes. Upon execution, the initial working directory is newroot. Notice that redirecting the output of command to a file, chroot newroot command >x will create the file x relative to the original root of command, not the new one. The new root path name is always relative to the current root. Even if a chroot is currently in effect, the newroot argument is relative to the current root of the running process. This command can be run only by the super-user. RETURN VALUES
The exit status of chroot is the return value of command. EXAMPLES
Example 1 Using the chroot Utility The chroot utility provides an easy way to extract tar files (see tar(1)) written with absolute filenames to a different location. It is necessary to copy the shared libraries used by tar (see ldd(1)) to the newroot filesystem. example# mkdir /tmp/lib; cd /lib example# cp /tmp/lib example# cp /usr/bin/tar /tmp example# dd if=/dev/rmt/0 | chroot /tmp tar xvf - ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
cd(1), tar(1), chroot(2), ttyname(3C), attributes(5) NOTES
Exercise extreme caution when referencing device files in the new root file system. References by routines such as ttyname(3C) to stdin, stdout, and stderr will find that the device associated with the file descriptor is unknown after chroot is run. SunOS 5.11 15 Dec 2003 chroot(1M)

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adt-virt-chroot(1)					     Linux Programmer's Manual						adt-virt-chroot(1)

adt-virt-chroot - autopkgtest virtualisation server using a chroot SYNOPSYS
adt-virt-chroot [options] =[chroot-name] adt-virt-chroot [options] [-rgain-root-cmd] /path/to/chroot DESCRIPTION
adt-virt-chroot provides an autopkgtest virtualisation server using a chroot install (or similar). Normally adt-virt-chroot will be invoked by adt-run. The chroot to use must be specified. If it starts with a = character then it is taken to be a chroot name known to dchroot(8). Otherwise it must start with a / and will be taken to an absolute path. OPTIONS
--gain-root|-r gain-root-cmd Specifies that adt-virt-chroot can become root (on the host) by prefixing its commands with gain-root-cmd. The command may consist of several words separated by whitespace, in which case words other than the first are supplied as additional arguments to the com- mand; other shell (or other) metacharacters in gain-root-cmd are not interpreted or modified by adt-virt-chroot. The actual command to be run as root, and its arguments, are supplied as additional (separate) arguments to gain-root-cmd. Root privilege is needed, to successfully run chroot(8), if the chroot to use is specified as an absolute path. The default is not to take any special action when root will be needed, in which case for an absolute path chroot, adt-virt-chroot must be started as root. -d | --debug Enables debugging output. Probably not hugely interesting. INPUT, OUTPUT AND EXIT STATUS The behaviour of adt-virt-chroot is as described by the AutomatedTesting virtualisation regime specification. SEE ALSO
adt-run(1), adt-virt-null(1), adt-virt-xenlvm(1), /usr/share/doc/autopkgtest/. AUTHORS AND COPYRIGHT
This manpage is part of autopkgtest, a tool for testing Debian binary packages. autopkgtest is Copyright (C) 2006-2007 Canonical Ltd and others. See /usr/share/doc/autopkgtest/CREDITS for the list of contributors and full copying conditions. autopkgtest 2007 adt-virt-chroot(1)
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