Function chdir

sys/amiga/amidos.c:452–486

static BPTR OrgDirLock = NO_LOCK;

int
chdir(
#ifdef CROSS_TO_AMIGA
      const
#endif
      char *dir)
{
    extern char orgdir[];

    if (dir == orgdir) {
        /* We want to go back to where we came from. */
        if (OrgDirLock != NO_LOCK) {
            UnLock(CurrentDir(OrgDirLock));
            OrgDirLock = NO_LOCK;
        }
    } else {
        /*
         * Go to some new place. If still at the original
         * directory, save the FileLock.
         */
        BPTR newDir;

        if (newDir = Lock((char *) dir, SHARED_LOCK)) {
            if (OrgDirLock == NO_LOCK) {
                OrgDirLock = CurrentDir(newDir);
            } else {
                UnLock(CurrentDir(newDir));
            }
        } else {
            return -1; /* Failed */
        }
    }
    /* CurrentDir always succeeds if you have a lock */
    return 0;
}

#endif /* CHDIR */