CHDIR(2-SVR4)       RISC/os Reference Manual        CHDIR(2-SVR4)



NAME
     chdir, fchdir - change working directory

SYNOPSIS
     #include <unistd.h>

     int chdir(const char *path);

     int fchdir(int fildes);

DESCRIPTION
     chdir and fchdir cause a directory pointed to by path or
     fildes to become the current working directory, the starting
     point for path searches for path names not beginning with /.
     path points to the path name of a directory.  The fildes
     argument to fchdir is an open file descriptor of a direc-
     tory.

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

     chdir 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 any com-
                         ponent of the path name.

     EFAULT              path points outside the allocated
                         address space of the process.

     INTR                A signal was caught during the execution
                         of the chdir system call.

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

     ELOOP               Too many symbolic links were encountered
                         in translating path.

     ENAMETOOLONG        The length of the path argument exceeds
                         {PATH_MAX}, or the length of a path com-
                         ponent exceeds {NAME_MAX} while
                         _POSIX_NO_TRUNC is in effect.

     ENOTDIR             A component of the path name is not a
                         directory.

     ENOENT              Either a component of the path prefix or
                         the directory named by path does not
                         exist or is a null pathname.

     ENOLINK             path points to a remote machine and the



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CHDIR(2-SVR4)       RISC/os Reference Manual        CHDIR(2-SVR4)



                         link to that machine is no longer
                         active.

     EMULTIHOP           Components of path require hopping to
                         multiple remote machines and file system
                         type does not allow it.

     fchdir 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 fildes.

     EBADF               fildes is not an open file descriptor.

     EINTR               A signal was caught during the execution
                         of the fchdir system call.

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

     ENOLINK             fildes points to a remote machine and
                         the link to that machine is no longer
                         active.

     ENOTDIR             The open file descriptor fildes does not
                         refer to a directory.

SEE ALSO
     chroot(2).

DIAGNOSTICS
     Upon successful completion, a value of zero is returned.
     Otherwise, a value of -1 is returned and errno is set to
     indicate the error.





















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