pwscan
rval = !pwscan(0, 0, NULL, pwres, buf, bufsiz);
rval = !pwscan(1, 0, name, pwres, buf, bufsiz);
rval = !pwscan(1, uid, NULL, pwres, buf, bufsiz);
static int pwscan(int, uid_t, const char *, struct passwd *,
!pwscan(0, 0, NULL, &_pw_passwd, pwline, sizeof(pwline)))
rval = pwscan(1, 0, name);
rval = pwscan(1, uid, NULL);
static int pwscan(int, uid_t, const char *);