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