BSD 2.11 - man page for chroot (bsd section 2)
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chroot - change root directory
Dirname is the address of the pathname of a directory, terminated by a null byte. Chroot
causes this directory to become the root directory, the starting point for path names
beginning with ``/''.
In order for a directory to become the root directory a process must have execute (search)
access to the directory.
This call is restricted to the super-user.
Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is
returned and errno is set to indicate an error.
Chroot will fail and the root directory will be unchanged if one or more of the following
[ENOTDIR] A component of the path name is not a directory.
[EINVAL] The pathname contains a character with the high-order bit set.
[ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an entire path name
exceeded 1023 characters.
[ENOENT] The named directory does not exist.
[EACCES] Search permission is denied for any component of the path name.
[ELOOP] Too many symbolic links were encountered in translating the pathname.
[EFAULT] Path points outside the process's allocated address space.
[EIO] An I/O error occurred while reading from or writing to the file system.
4.2 Berkeley Distribution August 26, 1985 CHROOT(2)
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