chroot(2)                                                         chroot(2)


   NAME
         chroot - change root directory

   SYNOPSIS
         #include <unistd.h>

         int chroot(const char *path);

   DESCRIPTION
         path points to a path name naming a directory.  chroot causes the
         named directory to become the root directory, the starting point for
         path searches for path names beginning with /.  The user's working
         directory is unaffected by the chroot system call.

         The effective user ID of the process must be super-user to change the
         root directory.

         The ..  entry in the root directory is interpreted to mean the root
         directory itself.  Thus, ..  cannot be used to access files outside
         the subtree rooted at the root directory.

         chroot will fail and the root directory will remain unchanged if one
         or more of the following are true:

         ELOOP          Too many symbolic links were encountered in
                        translating path.

         ENAMETOOLONG   The length of the path argument exceeds {PATH_MAX}, or
                        the length of a path component exceeds {NAME_MAX}
                        while _POSIX_NO_TRUNC is in effect.

         EFAULT         path points outside the allocated address space of the
                        process.

         EINTR          A signal was caught during the chroot system call.

         EMULTIHOP      Components of path require hopping to multiple remote
                        machines and file system type does not allow it.

         ENOLINK        path points to a remote machine and the link to that
                        machine is no longer active.

         ENOTDIR        Any component of the path name is not a directory.

         ENOENT         The named directory does not exist or is a null
                        pathname.

         EPERM          The effective user ID is not super-user.





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   chroot(2)                                                         chroot(2)


   SEE ALSO
         chdir(2).

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















































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