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+.\"	$OpenBSD: chdir.2,v 1.14 2015/09/10 17:55:21 schwarze Exp $
+.\"	$NetBSD: chdir.2,v 1.7 1995/02/27 12:32:00 cgd Exp $
+.\"
+.\" Copyright (c) 1980, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)chdir.2	8.2 (Berkeley) 12/11/93
+.\"
+.Dd $Mdocdate: September 10 2015 $
+.Dt CHDIR 2
+.Os
+.Sh NAME
+.Nm chdir ,
+.Nm fchdir
+.Nd change current working directory
+.Sh SYNOPSIS
+.In unistd.h
+.Ft int
+.Fn chdir "const char *path"
+.Ft int
+.Fn fchdir "int fd"
+.Sh DESCRIPTION
+The
+.Fa path
+argument points to the pathname of a directory.
+The
+.Fn chdir
+function causes the named directory to become the current working directory,
+that is, the starting point for path searches of pathnames not beginning with
+a slash
+.Pq Ql / .
+.Pp
+The
+.Fn fchdir
+function causes the directory referenced by
+.Fa fd
+to become the current working directory,
+the starting point for path searches of pathnames not beginning with
+a slash
+.Pq Ql / .
+.Pp
+In order for a directory to become the current directory,
+a process must have execute (search) access to the directory.
+.Sh RETURN VALUES
+.Rv -std
+.Sh ERRORS
+.Fn chdir
+will fail and the current working directory will be unchanged if
+one or more of the following are true:
+.Bl -tag -width Er
+.It Bq Er ENOTDIR
+A component of the path prefix is not a directory.
+.It Bq Er ENAMETOOLONG
+A component of a pathname exceeded
+.Dv NAME_MAX
+characters, or an entire pathname (including the terminating NUL)
+exceeded
+.Dv PATH_MAX
+bytes.
+.It Bq Er ENOENT
+The named directory does not exist.
+.It Bq Er ELOOP
+Too many symbolic links were encountered in translating the pathname.
+.It Bq Er EACCES
+Search permission is denied for any component of the pathname.
+.It Bq Er EFAULT
+.Fa path
+points outside the process's allocated address space.
+.It Bq Er EIO
+An I/O error occurred while reading from the file system.
+.El
+.Pp
+.Fn fchdir
+will fail and the current working directory will be unchanged if
+one or more of the following are true:
+.Bl -tag -width Er
+.It Bq Er EACCES
+Search permission is denied for the directory referenced by the
+file descriptor.
+.It Bq Er ENOTDIR
+The file descriptor does not reference a directory.
+.It Bq Er EBADF
+The argument
+.Fa fd
+is not a valid file descriptor.
+.It Bq Er EIO
+An I/O error occurred while reading from the file system.
+.El
+.Sh SEE ALSO
+.Xr chroot 2
+.Sh STANDARDS
+The
+.Fn chdir
+and
+.Fn fchdir
+functions are expected to conform to
+.St -p1003.1-2008 .
+.Sh HISTORY
+The
+.Fn chdir
+system call first appeared in
+.At v1 ,
+and
+.Fn fchdir
+in
+.Bx 4.3 Reno .