1 /* $OpenBSD: lpf.c,v 1.11 2004/04/14 20:52:20 millert Exp $ */ 2 /* $NetBSD: lpf.c,v 1.8 2000/04/29 00:12:32 abs Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1983, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 #if 0 41 static const char sccsid[] = "@(#)lpf.c 8.1 (Berkeley) 6/6/93"; 42 #else 43 static const char rcsid[] = "$OpenBSD: lpf.c,v 1.11 2004/04/14 20:52:20 millert Exp $"; 44 #endif 45 #endif /* not lint */ 46 47 /* 48 * filter which reads the output of nroff and converts lines 49 * with ^H's to overwritten lines. Thus this works like 'ul' 50 * but is much better: it can handle more than 2 overwrites 51 * and it is written with some style. 52 */ 53 54 #include <signal.h> 55 #include <stdlib.h> 56 #include <stdio.h> 57 #include <string.h> 58 #include <unistd.h> 59 60 #define MAXWIDTH 132 61 #define MAXREP 10 62 63 char buf[MAXREP][MAXWIDTH]; 64 int maxcol[MAXREP] = {-1}; 65 int lineno; 66 int width = 132; /* default line length */ 67 int length = 66; /* page length */ 68 int indent; /* indentation length */ 69 int npages = 1; 70 int literal; /* print control characters */ 71 int onlcr; /* map nl->cr-nl */ 72 char *name; /* user's login name */ 73 char *host; /* user's machine name */ 74 char *acctfile; /* accounting information file */ 75 76 __dead void usage(void); 77 78 int 79 main(int argc, char **argv) 80 { 81 FILE *p = stdin, *o = stdout; 82 int i, col; 83 char *cp; 84 int done, linedone, maxrep, ch; 85 char *limit; 86 87 while ((ch = getopt(argc, argv, "crh:i:j:l:n:w:")) != -1) { 88 switch (ch) { 89 case 'n': 90 name = optarg; 91 break; 92 case 'h': 93 host = optarg; 94 break; 95 case 'w': 96 if ((i = atoi(optarg)) > 0 && i <= MAXWIDTH) 97 width = i; 98 break; 99 case 'l': 100 length = atoi(optarg); 101 break; 102 case 'i': 103 indent = atoi(optarg); 104 break; 105 case 'r': /* map nl->cr-nl */ 106 onlcr++; 107 break; 108 case 'c': /* Print control chars */ 109 literal++; 110 break; 111 case 'j': /* ignore job name */ 112 break; 113 default: 114 usage(); 115 } 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 while (!linedone) { 130 switch (ch = getc(p)) { 131 case EOF: 132 linedone = done = 1; 133 ch = '\n'; 134 break; 135 136 case '\f': 137 lineno = length; 138 case '\n': 139 if (maxrep < 0) 140 maxrep = 0; 141 linedone = 1; 142 break; 143 144 case '\b': 145 if (--col < indent) 146 col = indent; 147 break; 148 149 case '\r': 150 col = indent; 151 break; 152 153 case '\t': 154 col = ((col - indent) | 07) + indent + 1; 155 break; 156 157 case '\031': 158 /* 159 * lpd needs to use a different filter to 160 * print data so stop what we are doing and 161 * wait for lpd to restart us. 162 */ 163 if ((ch = getchar()) == '\1') { 164 fflush(stdout); 165 kill(getpid(), SIGSTOP); 166 break; 167 } else { 168 ungetc(ch, stdin); 169 ch = '\031'; 170 } 171 172 default: 173 if (col >= width || (!literal && ch < ' ')) { 174 col++; 175 break; 176 } 177 cp = &buf[0][col]; 178 for (i = 0; i < MAXREP; i++) { 179 if (i > maxrep) 180 maxrep = i; 181 if (*cp == ' ') { 182 *cp = ch; 183 if (col > maxcol[i]) 184 maxcol[i] = col; 185 break; 186 } 187 cp += MAXWIDTH; 188 } 189 col++; 190 break; 191 } 192 } 193 194 /* print out lines */ 195 for (i = 0; i <= maxrep; i++) { 196 for (cp = buf[i], limit = cp+maxcol[i]; cp <= limit;) { 197 putc(*cp, o); 198 *cp++ = ' '; 199 } 200 if (i < maxrep) 201 putc('\r', o); 202 else { 203 if (onlcr) 204 putc('\r', o); 205 putc(ch, o); 206 } 207 if (++lineno >= length) { 208 fflush(o); 209 npages++; 210 lineno = 0; 211 } 212 maxcol[i] = -1; 213 } 214 } 215 if (lineno) { /* be sure to end on a page boundary */ 216 putchar('\f'); 217 npages++; 218 } 219 if (name && acctfile && access(acctfile, 02) >= 0 && 220 freopen(acctfile, "a", stdout) != NULL) { 221 printf("%7.2f\t%s:%s\n", (float)npages, host, name); 222 } 223 exit(0); 224 } 225 226 __dead void 227 usage(void) 228 { 229 extern char *__progname; 230 231 fprintf(stderr, "usage: %s [-c] [-r] [-h host] [-i indent] [-l length]" 232 " [-n name] [-w width] [acctfile]\n", __progname); 233 exit(1); 234 } 235