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@(#)chdir.2 8.2 (Berkeley) 12/11/93
$FreeBSD: head/lib/libc/sys/chdir.2 21673 1997-01-14 07:20:47Z jkh $
.Dd December 11, 1993 .Dt CHDIR 2 .Os BSD 4 .Sh NAME .Nm chdir , .Nm fchdir .Nd change current working directory .Sh SYNOPSIS .Fd #include <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, .Ql / .
p 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, .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 Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is returned and .Va errno is set to indicate the error. .Sh ERRORS .Fn Chdir 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 .Fa Path 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 .Fn Fchdir 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 function call is expected to conform to .St -p1003.1-90 . .Sh HISTORY A .Fn chdir function call appeared in .At v7 . The .Fn fchdir function call appeared in x 4.2 .