1 /* $NetBSD: lpf.c,v 1.10 2002/07/14 15:27:59 wiz Exp $ */ 2 /* 3 * Copyright (c) 1983, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 __COPYRIGHT("@(#) Copyright (c) 1983, 1993\n\ 38 The Regents of the University of California. All rights reserved.\n"); 39 #if 0 40 static char sccsid[] = "@(#)lpf.c 8.1 (Berkeley) 6/6/93"; 41 #else 42 __RCSID("$NetBSD: lpf.c,v 1.10 2002/07/14 15:27:59 wiz Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 /* 47 * filter which reads the output of nroff and converts lines 48 * with ^H's to overwritten lines. Thus this works like 'ul' 49 * but is much better: it can handle more than 2 overwrites 50 * and it is written with some style. 51 * modified by kls to use register references instead of arrays 52 * to try to gain a little speed. 53 */ 54 55 #include <signal.h> 56 #include <string.h> 57 #include <unistd.h> 58 #include <stdlib.h> 59 #include <stdio.h> 60 61 #define MAXWIDTH 132 62 #define MAXREP 10 63 64 char buf[MAXREP][MAXWIDTH]; 65 int maxcol[MAXREP] = {-1}; 66 int lineno; 67 int width = 132; /* default line length */ 68 int length = 66; /* page length */ 69 int indent; /* indentation length */ 70 int npages = 1; 71 int literal; /* print control characters */ 72 char *name; /* user's login name */ 73 char *host; /* user's machine name */ 74 char *acctfile; /* accounting information file */ 75 int crnl; /* \n -> \r\n */ 76 int need_cr; 77 78 int main(int, char *[]); 79 void usage(void); 80 81 int 82 main(int argc, char *argv[]) 83 { 84 FILE *p = stdin, *o = stdout; 85 int i, col; 86 char *cp; 87 int done, linedone, maxrep, ch, prch; 88 char *limit; 89 90 while ((ch = getopt(argc, argv, "cfh:i:l:n:w:")) != -1) 91 switch (ch) { 92 case 'n': 93 name = optarg; 94 break; 95 case 'h': 96 host = optarg; 97 break; 98 case 'w': 99 if ((i = atoi(optarg)) > 0 && i <= MAXWIDTH) 100 width = i; 101 break; 102 case 'l': 103 length = atoi(optarg); 104 break; 105 case 'i': 106 indent = atoi(optarg); 107 break; 108 case 'c': /* Print control chars */ 109 literal++; 110 break; 111 case 'f': /* Fix missing carriage returns */ 112 crnl++; 113 break; 114 default: 115 usage(); 116 } 117 argc -= optind; 118 argv += optind; 119 if (argc) 120 acctfile = *argv; 121 122 memset(buf, ' ', sizeof(buf)); 123 done = 0; 124 125 while (!done) { 126 col = indent; 127 maxrep = -1; 128 linedone = 0; 129 prch = ch = 0; 130 need_cr = 0; 131 while (!linedone) { 132 prch = ch; 133 switch (ch = getc(p)) { 134 case EOF: 135 linedone = done = 1; 136 ch = '\n'; 137 break; 138 139 case '\f': 140 lineno = length; 141 case '\n': 142 if (crnl && prch != '\r') 143 need_cr = 1; 144 if (maxrep < 0) 145 maxrep = 0; 146 linedone = 1; 147 break; 148 149 case '\b': 150 if (--col < indent) 151 col = indent; 152 break; 153 154 case '\r': 155 col = indent; 156 break; 157 158 case '\t': 159 col = ((col - indent) | 07) + indent + 1; 160 break; 161 162 case '\031': 163 /* 164 * lpd needs to use a different filter to 165 * print data so stop what we are doing and 166 * wait for lpd to restart us. 167 */ 168 if ((ch = getchar()) == '\1') { 169 fflush(stdout); 170 kill(getpid(), SIGSTOP); 171 break; 172 } else { 173 ungetc(ch, stdin); 174 ch = '\031'; 175 } 176 177 default: 178 if (col >= width || (!literal && ch < ' ')) { 179 col++; 180 break; 181 } 182 cp = &buf[0][col]; 183 for (i = 0; i < MAXREP; i++) { 184 if (i > maxrep) 185 maxrep = i; 186 if (*cp == ' ') { 187 *cp = ch; 188 if (col > maxcol[i]) 189 maxcol[i] = col; 190 break; 191 } 192 cp += MAXWIDTH; 193 } 194 col++; 195 break; 196 } 197 } 198 199 /* print out lines */ 200 for (i = 0; i <= maxrep; i++) { 201 for (cp = buf[i], limit = cp+maxcol[i]; cp <= limit;) { 202 putc(*cp, o); 203 *cp++ = ' '; 204 } 205 if (i < maxrep) 206 putc('\r', o); 207 else { 208 if (need_cr) 209 putc('\r', o); 210 putc(ch, o); 211 } 212 if (++lineno >= length) { 213 fflush(o); 214 npages++; 215 lineno = 0; 216 } 217 maxcol[i] = -1; 218 } 219 } 220 if (lineno) { /* be sure to end on a page boundary */ 221 putchar('\f'); 222 npages++; 223 } 224 if (name && acctfile && access(acctfile, 02) >= 0 && 225 freopen(acctfile, "a", stdout) != NULL) { 226 printf("%7.2f\t%s:%s\n", (float)npages, host, name); 227 } 228 exit(0); 229 } 230 231 void 232 usage(void) 233 { 234 fprintf(stderr, 235 "usage: lpf [-c] [-f] [-h host] [-i indent] [-l length] [-n name] [-w width] [acctfile]\n"); 236 exit(1); 237 238 } 239 240