19b50d902SRodney W. Grimes /*- 29b50d902SRodney W. Grimes * Copyright (c) 1991, 1993 39b50d902SRodney W. Grimes * The Regents of the University of California. All rights reserved. 49b50d902SRodney W. Grimes * 59b50d902SRodney W. Grimes * Redistribution and use in source and binary forms, with or without 69b50d902SRodney W. Grimes * modification, are permitted provided that the following conditions 79b50d902SRodney W. Grimes * are met: 89b50d902SRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 99b50d902SRodney W. Grimes * notice, this list of conditions and the following disclaimer. 109b50d902SRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 119b50d902SRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 129b50d902SRodney W. Grimes * documentation and/or other materials provided with the distribution. 139b50d902SRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 149b50d902SRodney W. Grimes * may be used to endorse or promote products derived from this software 159b50d902SRodney W. Grimes * without specific prior written permission. 169b50d902SRodney W. Grimes * 179b50d902SRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 189b50d902SRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 199b50d902SRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 209b50d902SRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 219b50d902SRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 229b50d902SRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 239b50d902SRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 249b50d902SRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 259b50d902SRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 269b50d902SRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 279b50d902SRodney W. Grimes * SUCH DAMAGE. 289b50d902SRodney W. Grimes * 299b50d902SRodney W. Grimes * @(#)extern.h 8.1 (Berkeley) 6/6/93 30726098d3SDavid Malone * 31726098d3SDavid Malone * $FreeBSD$ 329b50d902SRodney W. Grimes */ 339b50d902SRodney W. Grimes 34726098d3SDavid Malone #define WR(p, size) do { \ 35814e3a92SMark Murray if (write(STDOUT_FILENO, p, size) != (ssize_t)size) \ 36726098d3SDavid Malone oerr(); \ 37726098d3SDavid Malone } while(0) 38726098d3SDavid Malone 39726098d3SDavid Malone #define TAILMAPLEN (4<<20) 40726098d3SDavid Malone 41726098d3SDavid Malone struct mapinfo { 42726098d3SDavid Malone off_t mapoff; 43726098d3SDavid Malone off_t maxoff; 44726098d3SDavid Malone size_t maplen; 45726098d3SDavid Malone char *start; 46726098d3SDavid Malone int fd; 47726098d3SDavid Malone }; 489b50d902SRodney W. Grimes 4915a55f79SPaul Richards struct file_info { 5015a55f79SPaul Richards FILE *fp; 5115a55f79SPaul Richards char *file_name; 5215a55f79SPaul Richards struct stat st; 5315a55f79SPaul Richards }; 5415a55f79SPaul Richards 5515a55f79SPaul Richards typedef struct file_info file_info_t; 5615a55f79SPaul Richards 579b50d902SRodney W. Grimes enum STYLE { NOTSET = 0, FBYTES, FLINES, RBYTES, RLINES, REVERSE }; 589b50d902SRodney W. Grimes 5915a55f79SPaul Richards void follow(file_info_t *, enum STYLE, off_t); 6022da50cfSBrian Somers void forward(FILE *, const char *, enum STYLE, off_t, struct stat *); 6122da50cfSBrian Somers void reverse(FILE *, const char *, enum STYLE, off_t, struct stat *); 629b50d902SRodney W. Grimes 6322da50cfSBrian Somers int bytes(FILE *, const char *, off_t); 6422da50cfSBrian Somers int lines(FILE *, const char *, off_t); 659b50d902SRodney W. Grimes 6622da50cfSBrian Somers void ierr(const char *); 673f330d7dSWarner Losh void oerr(void); 683f330d7dSWarner Losh int mapprint(struct mapinfo *, off_t, off_t); 693f330d7dSWarner Losh int maparound(struct mapinfo *, off_t); 70*849d265dSJaakko Heinonen void printfn(const char *, int); 719b50d902SRodney W. Grimes 72aa1d7ce7SFlorent Thoumie extern int Fflag, fflag, qflag, rflag, rval, no_files; 73