CHROOT(2)                                                            CHROOT(2)



NAME
       chroot - change root directory

SYNOPSIS
       chroot(dirname)
       char *dirname;

DESCRIPTION
       _D_i_r_n_a_m_e  is the address of the pathname of a directory, terminated by a
       null byte.  _C_h_r_o_o_t 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.

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

ERRORS
       _C_h_r_o_o_t  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]       _P_a_t_h 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)