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Manpage of CHROOT

CHROOT

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NAME

chroot - change root directory  

SYNOPSIS

#include <unistd.h>

int chroot(const char *path);  

DESCRIPTION

chroot changes the root directory to that specified in path. This directory will be used for path names beginning with /. The root directory is inherited by all children 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 `/'. In particular, the super-user can escape from a `chroot jail' by doing `mkdir foo; chroot foo; cd ..'.  

RETURN VALUE

On success, zero is returned. On error, -1 is returned, and errno is set appropriately.  

ERRORS

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.
ENAMETOOLONG
path is too long.
ENOENT
The file does not exist.
ENOMEM
Insufficient kernel memory was available.
ENOTDIR
A component of path is not a directory.
EACCES
Search permission is denied on a component of the path prefix.
ELOOP
Too many symbolic links were encountered in resolving path.
EIO
An I/O error occurred.
 

CONFORMING TO

SVr4, SVID, 4.4BSD, X/OPEN. This function is not part of POSIX.1. SVr4 documents additional EINTR, ENOLINK and EMULTIHOP error conditions. X/OPEN does not document EIO, ENOMEM or EFAULT error conditions. This interface is marked as legacy by X/OPEN.  

NOTES

FreeBSD has a stronger jail() system call.  

SEE ALSO

chdir(2)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
NOTES
SEE ALSO