1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" %sccs.include.redist.man% 5.\" 6.\" @(#)chdir.2 8.2 (Berkeley) 12/11/93 7.\" 8.Dd 9.Dt CHDIR 2 10.Os BSD 4 11.Sh NAME 12.Nm chdir , 13.Nm fchdir 14.Nd change current working directory 15.Sh SYNOPSIS 16.Fd #include <unistd.h> 17.Ft int 18.Fn chdir "const char *path" 19.Ft int 20.Fn fchdir "int fd" 21.Sh DESCRIPTION 22The 23.Fa path 24argument points to the pathname of a directory. 25The 26.Fn chdir 27function 28causes the named directory 29to become the current working directory, that is, 30the starting point for path searches of pathnames not beginning with 31a slash, 32.Ql / . 33.Pp 34The 35.Fn fchdir 36function 37causes the directory referenced by 38.Fa fd 39to become the current working directory, 40the starting point for path searches of pathnames not beginning with 41a slash, 42.Ql / . 43.Pp 44In order for a directory to become the current directory, 45a process must have execute (search) access to the directory. 46.Sh RETURN VALUES 47Upon successful completion, a value of 0 is returned. 48Otherwise, a value of -1 is returned and 49.Va errno 50is set to indicate 51the error. 52.Sh ERRORS 53.Fn Chdir 54will fail and the current working directory will be unchanged if 55one or more of the following are true: 56.Bl -tag -width Er 57.It Bq Er ENOTDIR 58A component of the path prefix is not a directory. 59.It Bq Er EINVAL 60The pathname contains a character with the high-order bit set. 61.It Bq Er ENAMETOOLONG 62A component of a pathname exceeded 255 characters, 63or an entire path name exceeded 1023 characters. 64.It Bq Er ENOENT 65The named directory does not exist. 66.It Bq Er ELOOP 67Too many symbolic links were encountered in translating the pathname. 68.It Bq Er EACCES 69Search permission is denied for any component of 70the path name. 71.It Bq Er EFAULT 72.Fa Path 73points outside the process's allocated address space. 74.It Bq Er EIO 75An I/O error occurred while reading from or writing to the file system. 76.El 77.Pp 78.Fn Fchdir 79will fail and the current working directory will be unchanged if 80one or more of the following are true: 81.Bl -tag -width Er 82.It Bq Er EACCES 83Search permission is denied for the directory referenced by the 84file descriptor. 85.It Bq Er ENOTDIR 86The file descriptor does not reference a directory. 87.It Bq Er EBADF 88The argument 89.Fa fd 90is not a valid file descriptor. 91.El 92.Sh SEE ALSO 93.Xr chroot 2 94.Sh STANDARDS 95.Fn Chdir 96is expected to conform to IEEE Std 1003.1-1988 97.Pq Dq Tn POSIX . 98.Sh HISTORY 99The 100.Fn fchdir 101function call 102appeared in 103.Bx 4.2 . 104