1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1983, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)lpf.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.sbin/lpr/filters/lpf.c,v 1.6.2.2 2001/10/13 19:01:45 gad Exp $ 36 * $DragonFly: src/usr.sbin/lpr/filters/lpf.c,v 1.3 2004/03/22 22:32:50 cpressey Exp $ 37 */ 38 39 /* 40 * filter which reads the output of nroff and converts lines 41 * with ^H's to overwritten lines. Thus this works like 'ul' 42 * but is much better: it can handle more than 2 overwrites 43 * and it is written with some style. 44 * modified by kls to use register references instead of arrays 45 * to try to gain a little speed. 46 * further modified to let the compiler figure out which 47 * variables should be registers; they're very good at it these days. 48 */ 49 50 #include <signal.h> 51 #include <unistd.h> 52 #include <stdlib.h> 53 #include <stdio.h> 54 55 #define MAXWIDTH 132 56 #define MAXREP 10 57 58 char buf[MAXREP][MAXWIDTH]; 59 int maxcol[MAXREP] = {-1}; 60 int lineno; 61 int width = 132; /* default line length */ 62 int length = 66; /* page length */ 63 int indent; /* indentation length */ 64 int npages = 1; 65 int literal; /* print control characters */ 66 char *name; /* user's login name */ 67 char *host; /* user's machine name */ 68 char *acctfile; /* accounting information file */ 69 70 int 71 main(int argc, char **argv) 72 { 73 FILE *p = stdin, *o = stdout; 74 int i, col; 75 char *cp; 76 int done, linedone, maxrep; 77 char *limit; 78 int ch; 79 80 while (--argc) { 81 if (*(cp = *++argv) == '-') { 82 switch (cp[1]) { 83 case 'n': 84 argc--; 85 name = *++argv; 86 break; 87 88 case 'h': 89 argc--; 90 host = *++argv; 91 break; 92 93 case 'w': 94 if ((i = atoi(&cp[2])) > 0 && i <= MAXWIDTH) 95 width = i; 96 break; 97 98 case 'l': 99 length = atoi(&cp[2]); 100 break; 101 102 case 'i': 103 indent = atoi(&cp[2]); 104 break; 105 106 case 'c': /* Print control chars */ 107 literal++; 108 break; 109 } 110 } else 111 acctfile = cp; 112 } 113 114 for (cp = buf[0], limit = buf[MAXREP]; cp < limit; *cp++ = ' '); 115 done = 0; 116 117 while (!done) { 118 col = indent; 119 maxrep = -1; 120 linedone = 0; 121 while (!linedone) { 122 switch (ch = getc(p)) { 123 case EOF: 124 linedone = done = 1; 125 ch = '\n'; 126 break; 127 128 case '\f': 129 lineno = length; 130 case '\n': 131 if (maxrep < 0) 132 maxrep = 0; 133 linedone = 1; 134 break; 135 136 case '\b': 137 if (--col < indent) 138 col = indent; 139 break; 140 141 case '\r': 142 col = indent; 143 break; 144 145 case '\t': 146 col = ((col - indent) | 07) + indent + 1; 147 break; 148 149 case '\031': 150 /* 151 * lpd needs to use a different filter to 152 * print data so stop what we are doing and 153 * wait for lpd to restart us. 154 */ 155 if ((ch = getchar()) == '\1') { 156 fflush(stdout); 157 kill(getpid(), SIGSTOP); 158 break; 159 } else { 160 ungetc(ch, stdin); 161 ch = '\031'; 162 } 163 164 default: 165 if (col >= width || (!literal && ch < ' ')) { 166 col++; 167 break; 168 } 169 cp = &buf[0][col]; 170 for (i = 0; i < MAXREP; i++) { 171 if (i > maxrep) 172 maxrep = i; 173 if (*cp == ' ') { 174 *cp = ch; 175 if (col > maxcol[i]) 176 maxcol[i] = col; 177 break; 178 } 179 cp += MAXWIDTH; 180 } 181 col++; 182 break; 183 } 184 } 185 186 /* print out lines */ 187 for (i = 0; i <= maxrep; i++) { 188 for (cp = buf[i], limit = cp+maxcol[i]; cp <= limit;) { 189 putc(*cp, o); 190 *cp++ = ' '; 191 } 192 if (i < maxrep) 193 putc('\r', o); 194 else 195 putc(ch, o); 196 if (++lineno >= length) { 197 fflush(o); 198 npages++; 199 lineno = 0; 200 } 201 maxcol[i] = -1; 202 } 203 } 204 if (lineno) { /* be sure to end on a page boundary */ 205 putchar('\f'); 206 npages++; 207 } 208 if (name && acctfile && access(acctfile, 02) >= 0 && 209 freopen(acctfile, "a", stdout) != NULL) { 210 printf("%7.2f\t%s:%s\n", (float)npages, host, name); 211 } 212 exit(0); 213 } 214