+++ /dev/null
-.\" Copyright (c) 1992 Drew Eckhardt (drew@cs.colorado.edu), March 28, 1992
-.\"
-.\" %%%LICENSE_START(VERBATIM)
-.\" Permission is granted to make and distribute verbatim copies of this
-.\" manual provided the copyright notice and this permission notice are
-.\" preserved on all copies.
-.\"
-.\" Permission is granted to copy and distribute modified versions of this
-.\" manual under the conditions for verbatim copying, provided that the
-.\" entire resulting derived work is distributed under the terms of a
-.\" permission notice identical to this one.
-.\"
-.\" Since the Linux kernel and libraries are constantly changing, this
-.\" manual page may be incorrect or out-of-date. The author(s) assume no
-.\" responsibility for errors or omissions, or for damages resulting from
-.\" the use of the information contained herein. The author(s) may not
-.\" have taken the same level of care in the production of this manual,
-.\" which is licensed free of charge, as they might when working
-.\" professionally.
-.\"
-.\" Formatted or processed versions of this manual, if unaccompanied by
-.\" the source, must acknowledge the copyright and authors of this work.
-.\" %%%LICENSE_END
-.\"
-.\" Modified by Michael Haardt <michael@moria.de>
-.\" Modified 1993-07-21 by Rik Faith <faith@cs.unc.edu>
-.\" Modified 1994-08-21 by Michael Chastain <mec@shell.portal.com>
-.\" Modified 1996-06-13 by aeb
-.\" Modified 1996-11-06 by Eric S. Raymond <esr@thyrsus.com>
-.\" Modified 1997-08-21 by Joseph S. Myers <jsm28@cam.ac.uk>
-.\" Modified 2004-06-23 by Michael Kerrisk <mtk.manpages@gmail.com>
-.\"
-.TH CHROOT 2 2010-09-20 "Linux" "Linux Programmer's Manual"
-.SH NAME
-chroot \- change root directory
-.SH SYNOPSIS
-.B #include <unistd.h>
-.sp
-.BI "int chroot(const char *" path );
-.sp
-.in -4n
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.in
-.sp
-.BR chroot ():
-.ad l
-.RS 4
-.PD 0
-.TP 4
-Since glibc 2.2.2:
-.nf
-_BSD_SOURCE ||
- (_XOPEN_SOURCE\ >=\ 500 ||
- _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED) &&
- !(_POSIX_C_SOURCE\ >=\ 200112L || _XOPEN_SOURCE\ >=\ 600)
-.TP 4
-.fi
-Before glibc 2.2.2: none
-.PD
-.RE
-.ad b
-.SH DESCRIPTION
-.BR chroot ()
-changes the root directory of the calling process to that specified in
-.IR path .
-This directory will be used for pathnames beginning with \fI/\fP.
-The root directory is inherited by all children of the calling process.
-
-Only a privileged process (Linux: one with the
-.B CAP_SYS_CHROOT
-capability) may call
-.BR chroot ().
-
-This call changes an ingredient in the pathname resolution process
-and does nothing else.
-
-This call does not change the current working directory,
-so that after the call \(aq\fI.\fP\(aq can
-be outside the tree rooted at \(aq\fI/\fP\(aq.
-In particular, the superuser can escape from a "chroot jail"
-by doing:
-.nf
-
- mkdir foo; chroot foo; cd ..
-.fi
-
-This call does not close open file descriptors, and such file
-descriptors may allow access to files outside the chroot tree.
-.SH RETURN VALUE
-On success, zero is returned.
-On error, \-1 is returned, and
-.I errno
-is set appropriately.
-.SH ERRORS
-Depending on the filesystem, other errors can be returned.
-The more general errors are listed below:
-.TP
-.B EACCES
-Search permission is denied on a component of the path prefix.
-(See also
-.BR path_resolution (7).)
-.\" Also search permission is required on the final component,
-.\" maybe just to guarantee that it is a directory?
-.TP
-.B EFAULT
-.I path
-points outside your accessible address space.
-.TP
-.B EIO
-An I/O error occurred.
-.TP
-.B ELOOP
-Too many symbolic links were encountered in resolving
-.IR path .
-.TP
-.B ENAMETOOLONG
-.I path
-is too long.
-.TP
-.B ENOENT
-The file does not exist.
-.TP
-.B ENOMEM
-Insufficient kernel memory was available.
-.TP
-.B ENOTDIR
-A component of
-.I path
-is not a directory.
-.TP
-.B EPERM
-The caller has insufficient privilege.
-.SH CONFORMING TO
-SVr4, 4.4BSD, SUSv2 (marked LEGACY).
-This function is not part of POSIX.1-2001.
-.\" SVr4 documents additional EINTR, ENOLINK and EMULTIHOP error conditions.
-.\" X/OPEN does not document EIO, ENOMEM or EFAULT error conditions.
-.SH NOTES
-A child process created via
-.BR fork (2)
-inherits its parent's root directory.
-The root directory is left unchanged by
-.BR execve (2).
-
-FreeBSD has a stronger
-.BR jail ()
-system call.
-.\" FIXME . eventually say something about containers,
-.\" virtual servers, etc.?
-.SH SEE ALSO
-.BR chdir (2),
-.BR path_resolution (7)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.
OSDN Git Service
