colrm.c revision 87628
11590Srgrimes/*- 21590Srgrimes * Copyright (c) 1991, 1993 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * Redistribution and use in source and binary forms, with or without 61590Srgrimes * modification, are permitted provided that the following conditions 71590Srgrimes * are met: 81590Srgrimes * 1. Redistributions of source code must retain the above copyright 91590Srgrimes * notice, this list of conditions and the following disclaimer. 101590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111590Srgrimes * notice, this list of conditions and the following disclaimer in the 121590Srgrimes * documentation and/or other materials provided with the distribution. 131590Srgrimes * 3. All advertising materials mentioning features or use of this software 141590Srgrimes * must display the following acknowledgement: 151590Srgrimes * This product includes software developed by the University of 161590Srgrimes * California, Berkeley and its contributors. 171590Srgrimes * 4. Neither the name of the University nor the names of its contributors 181590Srgrimes * may be used to endorse or promote products derived from this software 191590Srgrimes * without specific prior written permission. 201590Srgrimes * 211590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311590Srgrimes * SUCH DAMAGE. 321590Srgrimes */ 331590Srgrimes 341590Srgrimes#ifndef lint 3541568Sarchiestatic const char copyright[] = 361590Srgrimes"@(#) Copyright (c) 1991, 1993\n\ 371590Srgrimes The Regents of the University of California. All rights reserved.\n"; 3887244Smarkm#endif 391590Srgrimes 4087628Sdwmalone#if 0 411590Srgrimes#ifndef lint 4287628Sdwmalonestatic char sccsid[] = "@(#)colrm.c 8.2 (Berkeley) 5/4/95"; 4387244Smarkm#endif 4487628Sdwmalone#endif 451590Srgrimes 4687628Sdwmalone#include <sys/cdefs.h> 4787628Sdwmalone__FBSDID("$FreeBSD: head/usr.bin/colrm/colrm.c 87628 2001-12-10 21:13:08Z dwmalone $"); 4887628Sdwmalone 491590Srgrimes#include <sys/types.h> 5026960Scharnier#include <err.h> 511590Srgrimes#include <errno.h> 5287244Smarkm#include <limits.h> 531590Srgrimes#include <stdio.h> 541590Srgrimes#include <stdlib.h> 551590Srgrimes#include <string.h> 5623690Speter#include <unistd.h> 571590Srgrimes 581590Srgrimes#define TAB 8 591590Srgrimes 601590Srgrimesvoid check __P((FILE *)); 6126960Scharnierstatic void usage __P((void)); 621590Srgrimes 631590Srgrimesint 641590Srgrimesmain(argc, argv) 651590Srgrimes int argc; 661590Srgrimes char *argv[]; 671590Srgrimes{ 6887244Smarkm u_long column, start, stop; 6987244Smarkm int ch; 701590Srgrimes char *p; 711590Srgrimes 7224360Simp while ((ch = getopt(argc, argv, "")) != -1) 731590Srgrimes switch(ch) { 741590Srgrimes case '?': 751590Srgrimes default: 761590Srgrimes usage(); 771590Srgrimes } 781590Srgrimes argc -= optind; 791590Srgrimes argv += optind; 801590Srgrimes 811590Srgrimes start = stop = 0; 821590Srgrimes switch(argc) { 831590Srgrimes case 2: 841590Srgrimes stop = strtol(argv[1], &p, 10); 851590Srgrimes if (stop <= 0 || *p) 8626960Scharnier errx(1, "illegal column -- %s", argv[1]); 871590Srgrimes /* FALLTHROUGH */ 881590Srgrimes case 1: 891590Srgrimes start = strtol(argv[0], &p, 10); 901590Srgrimes if (start <= 0 || *p) 9126960Scharnier errx(1, "illegal column -- %s", argv[0]); 921590Srgrimes break; 931590Srgrimes case 0: 941590Srgrimes break; 951590Srgrimes default: 961590Srgrimes usage(); 971590Srgrimes } 981590Srgrimes 991590Srgrimes if (stop && start > stop) 10026960Scharnier errx(1, "illegal start and stop columns"); 1011590Srgrimes 1021590Srgrimes for (column = 0;;) { 1031590Srgrimes switch (ch = getchar()) { 1041590Srgrimes case EOF: 1051590Srgrimes check(stdin); 1061590Srgrimes break; 1071590Srgrimes case '\b': 1081590Srgrimes if (column) 1091590Srgrimes --column; 1101590Srgrimes break; 1111590Srgrimes case '\n': 1121590Srgrimes column = 0; 1131590Srgrimes break; 1141590Srgrimes case '\t': 1151590Srgrimes column = (column + TAB) & ~(TAB - 1); 1161590Srgrimes break; 1171590Srgrimes default: 1181590Srgrimes ++column; 1191590Srgrimes break; 1201590Srgrimes } 1211590Srgrimes 12232069Salex if ((!start || column < start || (stop && column > stop)) && 1231590Srgrimes putchar(ch) == EOF) 1241590Srgrimes check(stdout); 1251590Srgrimes } 1261590Srgrimes} 1271590Srgrimes 1281590Srgrimesvoid 1291590Srgrimescheck(stream) 1301590Srgrimes FILE *stream; 1311590Srgrimes{ 1321590Srgrimes if (feof(stream)) 1331590Srgrimes exit(0); 1341590Srgrimes if (ferror(stream)) 13526960Scharnier err(1, "%s", stream == stdin ? "stdin" : "stdout"); 1361590Srgrimes} 1371590Srgrimes 1381590Srgrimesvoid 1391590Srgrimesusage() 1401590Srgrimes{ 1411590Srgrimes (void)fprintf(stderr, "usage: colrm [start [stop]]\n"); 1421590Srgrimes exit(1); 1431590Srgrimes} 1441590Srgrimes 145