bsd man page for chroot

CHROOT(2)							System Calls Manual							 CHROOT(2)

NAME
       chroot - change root directory

SYNOPSIS
       chroot(dirname)
       char *dirname;

DESCRIPTION
       Dirname	is  the address of the pathname of a directory, terminated by a null byte.  Chroot causes this directory to become the root direc-
       tory, 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.

RETURN VALUE
       Upon successful completion, a value of 0 is returned.  Otherwise, a value of -1 is returned and errno is set to indicate an error.

ERRORS
       Chroot will fail and the root directory will be unchanged if one or more of the following are true:

       [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.

SEE ALSO
       chdir(2)

4.2 Berkeley Distribution					  August 26, 1985							 CHROOT(2)