The fchdir() function shall be equivalent to chdir() except
directory that is to be the new current working directory is specified
by the file descriptor fildes.
A conforming application can obtain a file descriptor for a file of
type directory using open(), provided that the file status flags
and access modes do not contain O_WRONLY or
Upon successful completion, fchdir() shall return 0. Otherwise,
it shall return -1 and set errno to indicate the
error. On failure the current working directory shall remain unchanged.
The fchdir() function shall fail if:
Search permission is denied for the directory referenced by fildes.
The fildes argument is not an open file descriptor.
The open file descriptor fildes does not refer to a directory.
The fchdir() may fail if:
A signal was caught during the execution of fchdir().
An I/O error occurred while reading from or writing to the file system.
The following sections are informative.
chdir() , the Base Definitions volume of IEEE Std 1003.1-2001,
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at