PWBUFSZ
if (extendline(&line, &linelen, linelen + PWBUFSZ) == -1) {
int linelen = PWBUFSZ;
int outlen = PWBUFSZ;
int linesize = PWBUFSZ;
if (extendline(&line, &linesize, linesize + PWBUFSZ) == -1) {
char pwbuf[PWBUFSZ];
extendline(&grtmp, &grlen, grlen + PWBUFSZ);
char pfx[PWBUFSZ];
char pwbuf[PWBUFSZ];
int l = snprintf(pfx, PWBUFSZ, "%s:", user);