chroot - change root directory
int chroot(const char *path);
chroot changes the root directory to that specified in
path. This directory will be used for path names begin
ning with /. The root directory is inherited by all chil
dren of the current process.
Only the super-user may change the root directory.
Note that this call does not change the current working
directory, so that `.' can be outside the tree rooted at
On success, zero is returned. On error, -1 is returned,
and errno is set appropriately.
Depending on the file system, other errors can be
returned. The more general errors are listed below:
EPERM The effective UID is not zero.
EFAULT path points outside your accessible address space.
path is too long.
ENOENT The file does not exist.
ENOMEM Insufficient kernel memory was available.
A component of path is not a directory.
EACCES Search permission is denied on a component of the
ELOOP Too many symbolic links were encountered in resolv
EIO An I/O error occurred.
SVr4, SVID, 4.4BSD, X/OPEN. This function is not part of
ENOMEM or EFAULT error conditions. This interface is
marked as legacy by X/OPEN.