chroot man page on BSDOS

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CHROOT(2)		    BSD Programmer's Manual		     CHROOT(2)

NAME
     chroot - change root directory

SYNOPSIS
     #include <unistd.h>

     int
     chroot(const char *dirname);

DESCRIPTION
     The chroot() function changes the root directory for the process to
     dirname, that is, the starting point for pathnames beginning with `/',
     and the topmost directory for pathnames containing `..'.

     In order for dirname to become the root directory, the process must have
     execute (search) access for it.

     Note that chroot() has no effect on the process's current directory.  To
     prevent access to other directories, execute a `chdir("/");' after the
     chroot() call.

     This call is restricted to the super-user.

RETURN VALUES
     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:

     [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 en-
		tire 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),	chroot(8)

HISTORY
     The chroot function call appeared in 4.2BSD.

4.2 Berkeley Distribution	 June 4, 1993				     1
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