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@(#)chdir.2 8.2 (Berkeley) 12/11/93
$FreeBSD: stable/10/lib/libc/sys/chdir.2 165903 2007-01-09 00:28:16Z imp $
.Dd December 11, 1993 .Dt CHDIR 2 .Os .Sh NAME .Nm chdir , .Nm fchdir .Nd change current working directory .Sh LIBRARY .Lb libc .Sh SYNOPSIS n 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 system call 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, .Ql / .
p The .Fn fchdir system call 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, .Ql / .
p 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 The .Fn chdir system call will fail and the current working directory will be unchanged if one or more of the following are true: l -tag -width Er t Bq Er ENOTDIR A component of the path prefix is not a directory. t Bq Er ENAMETOOLONG A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters. t Bq Er ENOENT The named directory does not exist. t Bq Er ELOOP Too many symbolic links were encountered in translating the pathname. t Bq Er EACCES Search permission is denied for any component of the path name. t Bq Er EFAULT The .Fa path argument points outside the process's allocated address space. t Bq Er EIO An I/O error occurred while reading from or writing to the file system. .El
p The .Fn fchdir system call will fail and the current working directory will be unchanged if one or more of the following are true: l -tag -width Er t Bq Er EACCES Search permission is denied for the directory referenced by the file descriptor. t Bq Er ENOTDIR The file descriptor does not reference a directory. t Bq Er EBADF The argument .Fa fd is not a valid file descriptor. .El .Sh SEE ALSO .Xr chroot 2 .Sh STANDARDS The .Fn chdir system call is expected to conform to .St -p1003.1-90 . .Sh HISTORY The .Fn chdir system call appeared in .At v7 . The .Fn fchdir system call appeared in x 4.2 .