.\" Copyright (c) 1983, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\" %sccs.include.redist.man%
.\" @(#)chroot.2 8.1 (Berkeley) %G%
.Nd change root directory
.Fn chroot "const char *dirname"
is the address of the pathname of a directory, terminated by an ASCII NUL.
to become the root directory,
that is, the starting point for path searches of pathnames
In order for a directory to become the root directory
a process must have execute (search) access for that directory.
has no effect on the process's current directory.
This call is restricted to the super-user.
Upon successful completion, a value of 0 is returned. Otherwise,
a value of -1 is returned and
is set to indicate an error.
will fail and the root directory will be unchanged if:
.Bl -tag -width [ENOTDIR]
A component of the path name is not a directory.
The pathname contains a character with the high-order bit set.
A component of a pathname exceeded 255 characters,
or an entire path name exceeded 1023 characters.
The named directory does not exist.
Search permission is denied for any component of the path name.
Too many symbolic links were encountered in translating the pathname.
points outside the process's allocated address space.
An I/O error occurred while reading from or writing to the file system.
function call appeared in