chroot(8) - NetBSD Manual Pages

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CHROOT(8)               NetBSD System Manager's Manual               CHROOT(8)

chroot -- change root directory
chroot [-G group,group,...] [-g group] [-u user] newroot [command]
The chroot command changes its root directory to the supplied directory newroot and exec's command, or, if not supplied, an interactive copy of your shell. If the -u, -g, or -G options are given, the user, group, and group list of the process are set to these values after the chroot has taken place; see setgid(2), setgroups(2), setuid(2), getgrnam(3), and getpwnam(3). Note: command or the shell are run as your real-user-id.
The following environment variable is referenced by chroot: SHELL If set, the string specified by SHELL is interpreted as the name of the shell to exec. If the variable SHELL is not set, /bin/sh is used.
ldd(1), chdir(2), chroot(2), environ(7)
The chroot utility first appeared in 4.4BSD.
chroot should never be installed setuid root, as it would then be possi- ble to exploit the program to gain root privileges. NetBSD 9.99 August 13, 2011 NetBSD 9.99
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