+ CInfoPBRec pb;
+ Str255 dirname;
+ OSErr err;
+ static char *path = NULL;
+ char *newpath;
+
+ if (path != NULL) sfree(path);
+ path = smalloc(fn->fss.name[0]);
+ p2cstrcpy(path, fn->fss.name);
+ pb.dirInfo.ioNamePtr = dirname;
+ pb.dirInfo.ioVRefNum = fn->fss.vRefNum;
+ pb.dirInfo.ioDrParID = fn->fss.parID;
+ pb.dirInfo.ioFDirIndex = -1;
+ do {
+ pb.dirInfo.ioDrDirID = pb.dirInfo.ioDrParID;
+ err = PBGetCatInfoSync(&pb);
+
+ /* XXX Assume not A/UX */
+ newpath = smalloc(strlen(path) + dirname[0] + 2);
+ p2cstrcpy(newpath, dirname);
+ strcat(newpath, ":");
+ strcat(newpath, path);
+ sfree(path);
+ path = newpath;
+ } while (pb.dirInfo.ioDrDirID != fsRtDirID);
+ return path;