4.4BSD/usr/src/usr.bin/head/tags

Mhead	head.c	/^main(argc, argv)$/
err	head.c	/^err(fatal, fmt, va_alist)$/
head	head.c	/^head(fp, cnt)$/
obsolete	head.c	/^obsolete(argv)$/
usage	head.c	/^usage()$/