chroot(2)                        UNIX System V                        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 {PATHMAX}, or the
                     length of a path component exceeds {NAMEMAX} while
                     POSIXNOTRUNC 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                     machine is no longer active.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.

SEE ALSO
      chdir(2).




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chroot(2)                        UNIX System V                        chroot(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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