1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)chdir.2 8.2 (Berkeley) 12/11/93 29.\" $FreeBSD: src/lib/libc/sys/chdir.2,v 1.7.2.5 2001/12/14 18:34:00 ru Exp $ 30.\" $DragonFly: src/lib/libc/sys/chdir.2,v 1.2 2003/06/17 04:26:47 dillon Exp $ 31.\" 32.Dd December 11, 1993 33.Dt CHDIR 2 34.Os 35.Sh NAME 36.Nm chdir , 37.Nm fchdir 38.Nd change current working directory 39.Sh LIBRARY 40.Lb libc 41.Sh SYNOPSIS 42.In unistd.h 43.Ft int 44.Fn chdir "const char *path" 45.Ft int 46.Fn fchdir "int fd" 47.Sh DESCRIPTION 48The 49.Fa path 50argument points to the pathname of a directory. 51The 52.Fn chdir 53function 54causes the named directory 55to become the current working directory, that is, 56the starting point for path searches of pathnames not beginning with 57a slash, 58.Ql / . 59.Pp 60The 61.Fn fchdir 62function 63causes the directory referenced by 64.Fa fd 65to become the current working directory, 66the starting point for path searches of pathnames not beginning with 67a slash, 68.Ql / . 69.Pp 70In order for a directory to become the current directory, 71a process must have execute (search) access to the directory. 72.Sh RETURN VALUES 73.Rv -std 74.Sh ERRORS 75.Fn Chdir 76will fail and the current working directory will be unchanged if 77one or more of the following are true: 78.Bl -tag -width Er 79.It Bq Er ENOTDIR 80A component of the path prefix is not a directory. 81.It Bq Er ENAMETOOLONG 82A component of a pathname exceeded 255 characters, 83or an entire path name exceeded 1023 characters. 84.It Bq Er ENOENT 85The named directory does not exist. 86.It Bq Er ELOOP 87Too many symbolic links were encountered in translating the pathname. 88.It Bq Er EACCES 89Search permission is denied for any component of 90the path name. 91.It Bq Er EFAULT 92.Fa Path 93points outside the process's allocated address space. 94.It Bq Er EIO 95An I/O error occurred while reading from or writing to the file system. 96.El 97.Pp 98.Fn Fchdir 99will fail and the current working directory will be unchanged if 100one or more of the following are true: 101.Bl -tag -width Er 102.It Bq Er EACCES 103Search permission is denied for the directory referenced by the 104file descriptor. 105.It Bq Er ENOTDIR 106The file descriptor does not reference a directory. 107.It Bq Er EBADF 108The argument 109.Fa fd 110is not a valid file descriptor. 111.El 112.Sh SEE ALSO 113.Xr chroot 2 114.Sh STANDARDS 115The 116.Fn chdir 117function call is expected to conform to 118.St -p1003.1-90 . 119.Sh HISTORY 120A 121.Fn chdir 122function call appeared in 123.At v7 . 124The 125.Fn fchdir 126function call 127appeared in 128.Bx 4.2 . 129