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. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)chdir.2 8.2 (Berkeley) 12/11/93 33.\" $FreeBSD: src/lib/libc/sys/chdir.2,v 1.7.2.5 2001/12/14 18:34:00 ru Exp $ 34.\" $DragonFly: src/lib/libc/sys/chdir.2,v 1.2 2003/06/17 04:26:47 dillon Exp $ 35.\" 36.Dd December 11, 1993 37.Dt CHDIR 2 38.Os 39.Sh NAME 40.Nm chdir , 41.Nm fchdir 42.Nd change current working directory 43.Sh LIBRARY 44.Lb libc 45.Sh SYNOPSIS 46.In unistd.h 47.Ft int 48.Fn chdir "const char *path" 49.Ft int 50.Fn fchdir "int fd" 51.Sh DESCRIPTION 52The 53.Fa path 54argument points to the pathname of a directory. 55The 56.Fn chdir 57function 58causes the named directory 59to become the current working directory, that is, 60the starting point for path searches of pathnames not beginning with 61a slash, 62.Ql / . 63.Pp 64The 65.Fn fchdir 66function 67causes the directory referenced by 68.Fa fd 69to become the current working directory, 70the starting point for path searches of pathnames not beginning with 71a slash, 72.Ql / . 73.Pp 74In order for a directory to become the current directory, 75a process must have execute (search) access to the directory. 76.Sh RETURN VALUES 77.Rv -std 78.Sh ERRORS 79.Fn Chdir 80will fail and the current working directory will be unchanged if 81one or more of the following are true: 82.Bl -tag -width Er 83.It Bq Er ENOTDIR 84A component of the path prefix is not a directory. 85.It Bq Er ENAMETOOLONG 86A component of a pathname exceeded 255 characters, 87or an entire path name exceeded 1023 characters. 88.It Bq Er ENOENT 89The named directory does not exist. 90.It Bq Er ELOOP 91Too many symbolic links were encountered in translating the pathname. 92.It Bq Er EACCES 93Search permission is denied for any component of 94the path name. 95.It Bq Er EFAULT 96.Fa Path 97points outside the process's allocated address space. 98.It Bq Er EIO 99An I/O error occurred while reading from or writing to the file system. 100.El 101.Pp 102.Fn Fchdir 103will fail and the current working directory will be unchanged if 104one or more of the following are true: 105.Bl -tag -width Er 106.It Bq Er EACCES 107Search permission is denied for the directory referenced by the 108file descriptor. 109.It Bq Er ENOTDIR 110The file descriptor does not reference a directory. 111.It Bq Er EBADF 112The argument 113.Fa fd 114is not a valid file descriptor. 115.El 116.Sh SEE ALSO 117.Xr chroot 2 118.Sh STANDARDS 119The 120.Fn chdir 121function call is expected to conform to 122.St -p1003.1-90 . 123.Sh HISTORY 124A 125.Fn chdir 126function call appeared in 127.At v7 . 128The 129.Fn fchdir 130function call 131appeared in 132.Bx 4.2 . 133