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NAME

     chdir, fchdir - change current working directory

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <unistd.h>

     int
     chdir(const char *path);

     int
     fchdir(int fd);

DESCRIPTION

     The path argument points to the pathname of a directory.  The 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, ‘/’.

     The fchdir() system call causes the directory referenced by fd to become
     the current working directory, the starting point for path searches of
     pathnames not beginning with a slash, ‘/’.

     In order for a directory to become the current directory, a process must
     have execute (search) access to the directory.

RETURN VALUES

     Upon successful completion, the value 0 is returned; otherwise the
     value -1 is returned and the global variable errno is set to indicate the
     error.

ERRORS

     The chdir() system call will fail and the current working directory will
     be unchanged if one or more of the following are true:

     [ENOTDIR]          A component of the path prefix is not a directory.

     [ENAMETOOLONG]     A component of a pathname exceeded 255 characters, or
                        an entire path name exceeded 1023 characters.

     [ENOENT]           The named directory does not exist.

     [ELOOP]            Too many symbolic links were encountered in
                        translating the pathname.

     [EACCES]           Search permission is denied for any component of the
                        path name.

     [EFAULT]           The path argument points outside the process’s
                        allocated address space.

     [EIO]              An I/O error occurred while reading from or writing to
                        the file system.

     The fchdir() system call will fail and the current working directory will
     be unchanged if one or more of the following are true:

     [EACCES]           Search permission is denied for the directory
                        referenced by the file descriptor.

     [ENOTDIR]          The file descriptor does not reference a directory.

     [EBADF]            The argument fd is not a valid file descriptor.

SEE ALSO

     chroot(2)

STANDARDS

     The chdir() system call is expected to conform to ISO/IEC 9945-1:1990
     (“POSIX.1”).

HISTORY

     The chdir() system call appeared in Version 7 AT&T UNIX.  The fchdir()
     system call appeared in 4.2BSD.