banner.c revision 1.10
1/* $OpenBSD: banner.c,v 1.10 2015/10/05 05:33:29 deraadt Exp $ */ 2/* $NetBSD: banner.c,v 1.2 1995/04/09 06:00:15 cgd Exp $ */ 3 4/* 5 * Changes for banner(1) 6 * 7 * @(#)Copyright (c) 1995, Simon J. Gerraty. 8 * 9 * This is free software. It comes with NO WARRANTY. 10 * Permission to use, modify and distribute this source code 11 * is granted subject to the following conditions. 12 * 1/ that the above copyright notice and this notice 13 * are preserved in all copies and that due credit be given 14 * to the author. 15 * 2/ that any changes to this code are clearly commented 16 * as such so that the author does not get blamed for bugs 17 * other than his own. 18 * 19 * Please send copies of changes and bug-fixes to: 20 * sjg@zen.void.oz.au 21 */ 22 23/* 24 * Copyright (c) 1983, 1993 25 * The Regents of the University of California. All rights reserved. 26 * 27 * Redistribution and use in source and binary forms, with or without 28 * modification, are permitted provided that the following conditions 29 * are met: 30 * 1. Redistributions of source code must retain the above copyright 31 * notice, this list of conditions and the following disclaimer. 32 * 2. Redistributions in binary form must reproduce the above copyright 33 * notice, this list of conditions and the following disclaimer in the 34 * documentation and/or other materials provided with the distribution. 35 * 3. Neither the name of the University nor the names of its contributors 36 * may be used to endorse or promote products derived from this software 37 * without specific prior written permission. 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 40 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 42 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 43 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 44 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 45 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 47 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 48 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 49 * SUCH DAMAGE. 50 */ 51 52#include <stdio.h> 53#include <unistd.h> 54#include <stdlib.h> 55#include <string.h> 56#include <err.h> 57 58#include "banner.h" 59 60static long PW = LINELEN; 61 62/* the char gen code below is lifted from lpd */ 63 64static char * 65scnline(int key, char *p, int c) 66{ 67 int scnwidth; 68 69 /* 70 * <sjg> lpd makes chars out of the letter in question. 71 * the results are somewhat mixed. Sticking to '#' as 72 * banner(1) does is more consistent. 73 */ 74#ifndef NOHASH_ONLY 75 c = '#'; 76#endif 77 78 for (scnwidth = WIDTH; --scnwidth;) { 79 key <<= 1; 80 *p++ = key & 0200 ? c : BACKGND; 81 } 82 return (p); 83} 84 85#define TRC(q) (((q)-' ')&0177) 86 87 88static int 89dropit(int c) 90{ 91 switch(c) { 92 93 case TRC('_'): 94 case TRC(';'): 95 case TRC(','): 96 case TRC('g'): 97 case TRC('j'): 98 case TRC('p'): 99 case TRC('q'): 100 case TRC('y'): 101 return (DROP); 102 103 default: 104 return (0); 105 } 106} 107 108static void 109scan_out(int scfd, char *scsp, int dlm) 110{ 111 char *strp; 112 int nchrs, j; 113 char outbuf[LINELEN+1], *sp, c, cc; 114 int d, scnhgt; 115 extern char scnkey[][HEIGHT]; /* in lpdchar.c */ 116 117 for (scnhgt = 0; scnhgt++ < HEIGHT+DROP; ) { 118 strp = &outbuf[0]; 119 sp = scsp; 120 for (nchrs = 0; *sp != dlm && *sp != '\0'; ) { 121 cc = *sp++; 122 if ((unsigned char)cc < ' ' || 123 (unsigned char)cc > 0x7f) 124 cc = INVALID; 125 126 c = TRC(cc); 127 d = dropit(c); 128 if ((!d && scnhgt > HEIGHT) || (scnhgt <= DROP && d)) 129 for (j = WIDTH; --j;) 130 *strp++ = BACKGND; 131 else 132 strp = scnline(scnkey[(int)c][scnhgt-1-d], strp, cc); 133 if (nchrs++ >= PW/(WIDTH+1)-1) 134 break; 135 *strp++ = BACKGND; 136#ifdef LPD_CHSET /* <sjg> */ 137 *strp++ = BACKGND; 138#endif 139 } 140 while (*--strp == BACKGND && strp >= outbuf) 141 ; 142 strp++; 143 *strp++ = '\n'; 144 (void) write(scfd, outbuf, strp-outbuf); 145 } 146} 147 148/* 149 * for each word, print up to 10 chars in big letters. 150 */ 151int 152main(int argc, char *argv[]) 153{ 154 char word[10+1]; /* strings limited to 10 chars */ 155 156 if (tame("stdio", NULL) == -1) 157 err(1, "tame"); 158 while (*++argv) { 159 (void)strlcpy(word, *argv, sizeof (word)); 160 scan_out(1, word, '\0'); 161 } 162 exit(0); 163} 164