setpgsz
if ((rc = setpgsz(Pr, Pstatus(Pr)->pr_dmodel, pgsz)) != 0) {
rc = setpgsz(Pr, Pstatus(Pr)->pr_dmodel, pgsz);
rc = setpgsz(NULL, psinfo.pr_dmodel, pgsz);
static int setpgsz(struct ps_prochandle *, int, size_t *);