Pcreate
Pr = Pcreate(argv[0], &argv[0], &err, path, sizeof (path));
if ((Pr = Pcreate(argv[0], &argv[0], &gret, NULL, 0)) == NULL) {
Proc = Pcreate(argv[0], &argv[0], &err, path, sizeof (path));
if ((pctx->Pr = Pcreate(filename, argv, &err, 0, 0)) == NULL) {
extern struct ps_prochandle *Pcreate(const char *, char *const *,
P = Pcreate(argv[1], &argv[1], &perr, NULL, 0);
P = Pcreate(xp->xp_prog, argv, &perr, NULL, 0);