19b50d902SRodney W. Grimes /*- 28a16b7a1SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause 38a16b7a1SPedro F. Giffuni * 49b50d902SRodney W. Grimes * Copyright (c) 1991, 1993 59b50d902SRodney W. Grimes * The Regents of the University of California. All rights reserved. 69b50d902SRodney W. Grimes * 79b50d902SRodney W. Grimes * Redistribution and use in source and binary forms, with or without 89b50d902SRodney W. Grimes * modification, are permitted provided that the following conditions 99b50d902SRodney W. Grimes * are met: 109b50d902SRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 119b50d902SRodney W. Grimes * notice, this list of conditions and the following disclaimer. 129b50d902SRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 139b50d902SRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 149b50d902SRodney W. Grimes * documentation and/or other materials provided with the distribution. 15fbbd9655SWarner Losh * 3. Neither the name of the University nor the names of its contributors 169b50d902SRodney W. Grimes * may be used to endorse or promote products derived from this software 179b50d902SRodney W. Grimes * without specific prior written permission. 189b50d902SRodney W. Grimes * 199b50d902SRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 209b50d902SRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 219b50d902SRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 229b50d902SRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 239b50d902SRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 249b50d902SRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 259b50d902SRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 269b50d902SRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 279b50d902SRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 289b50d902SRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 299b50d902SRodney W. Grimes * SUCH DAMAGE. 309b50d902SRodney W. Grimes * 319b50d902SRodney W. Grimes * @(#)extern.h 8.1 (Berkeley) 6/6/93 32726098d3SDavid Malone * 33726098d3SDavid Malone * $FreeBSD$ 349b50d902SRodney W. Grimes */ 359b50d902SRodney W. Grimes 36726098d3SDavid Malone #define WR(p, size) do { \ 37b2b1603eSConrad Meyer ssize_t res; \ 38b2b1603eSConrad Meyer res = write(STDOUT_FILENO, p, size); \ 39b2b1603eSConrad Meyer if (res != (ssize_t)size) { \ 40b2b1603eSConrad Meyer if (res == -1) \ 41726098d3SDavid Malone oerr(); \ 42b2b1603eSConrad Meyer else \ 43b2b1603eSConrad Meyer errx(1, "stdout"); \ 44b2b1603eSConrad Meyer } \ 45726098d3SDavid Malone } while (0) 46726098d3SDavid Malone 47726098d3SDavid Malone #define TAILMAPLEN (4<<20) 48726098d3SDavid Malone 49726098d3SDavid Malone struct mapinfo { 50726098d3SDavid Malone off_t mapoff; 51726098d3SDavid Malone off_t maxoff; 52726098d3SDavid Malone size_t maplen; 53726098d3SDavid Malone char *start; 54726098d3SDavid Malone int fd; 55726098d3SDavid Malone }; 569b50d902SRodney W. Grimes 5715a55f79SPaul Richards struct file_info { 5815a55f79SPaul Richards FILE *fp; 597e118899SMark Johnston const char *file_name; 6015a55f79SPaul Richards struct stat st; 6115a55f79SPaul Richards }; 6215a55f79SPaul Richards 6315a55f79SPaul Richards typedef struct file_info file_info_t; 6415a55f79SPaul Richards 659b50d902SRodney W. Grimes enum STYLE { NOTSET = 0, FBYTES, FLINES, RBYTES, RLINES, REVERSE }; 669b50d902SRodney W. Grimes 6715a55f79SPaul Richards void follow(file_info_t *, enum STYLE, off_t); 6822da50cfSBrian Somers void forward(FILE *, const char *, enum STYLE, off_t, struct stat *); 6922da50cfSBrian Somers void reverse(FILE *, const char *, enum STYLE, off_t, struct stat *); 709b50d902SRodney W. Grimes 7122da50cfSBrian Somers int bytes(FILE *, const char *, off_t); 7222da50cfSBrian Somers int lines(FILE *, const char *, off_t); 739b50d902SRodney W. Grimes 7422da50cfSBrian Somers void ierr(const char *); 753f330d7dSWarner Losh void oerr(void); 763f330d7dSWarner Losh int mapprint(struct mapinfo *, off_t, off_t); 773f330d7dSWarner Losh int maparound(struct mapinfo *, off_t); 78849d265dSJaakko Heinonen void printfn(const char *, int); 799b50d902SRodney W. Grimes 80*643ac419SXin LI extern int Fflag, fflag, qflag, rflag, rval, no_files, vflag; 81c851fce6SMariusz Zaborski extern fileargs_t *fa; 82