CHROOT(2) MachTen Programmer’s Manual CHROOT(2)

NAME
chroot - change root directory

SYNOPSIS
#include <unistd.h>

int
chroot(const char *dirname)

DESCRIPTION
Dirname is the address of the pathname of a directory, terminated by an
ASCII NUL. Chroot() causes dirname to become the root directory, that
is, the starting point for path searches of pathnames beginning with ‘/’.

In order for a directory to become the root directory a process must have
execute (search) access for that directory.

It should be noted that chroot() has no effect on the process’s current
directory.

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.