read_line
int read_line(FILE *, char *, int, int, char **, char *);
len = read_line(buf, 512);
len = read_line(buf, 512);
len = read_line(buf, 512);
if ((ret = read_line(fd, buf, sizeof (buf))) > 0) {
extern int read_line(int fd, char *buffer, int buflen);
if ((linelen = read_line(fp, buffer, sizeof (buffer),
linelen = read_line(be->f, instr, be->minbuf);
if ((linelen = read_line(be->f, instr, be->minbuf)) < 0) {
linelen = read_line(be->f, instr, be->minbuf);