getvfsfile
if (getvfsfile(vfstab, &vfsbuf, "/") == 0) {
if (getvfsfile(vfstab, &vfsbuf, "/usr") == 0) {
if (getvfsfile(vfstab, &vfsbuf,
if (getvfsfile(fp, &vfsent, "/") != 0) {
extern int getvfsfile(FILE *, struct vfstab *, char *);