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 34 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1983, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)lpf.c 8.1 (Berkeley) 6/6/93"; 42 #endif /* not lint */ 43 44 /* 45 * filter which reads the output of nroff and converts lines 46 * with ^H's to overwritten lines. Thus this works like 'ul' 47 * but is much better: it can handle more than 2 overwrites 48 * and it is written with some style. 49 * modified by kls to use register references instead of arrays 50 * to try to gain a little speed. 51 */ 52 53 #include <signal.h> 54 #include <unistd.h> 55 #include <stdlib.h> 56 #include <stdio.h> 57 58 #define MAXWIDTH 132 59 #define MAXREP 10 60 61 char buf[MAXREP][MAXWIDTH]; 62 int maxcol[MAXREP] = {-1}; 63 int lineno; 64 int width = 132; /* default line length */ 65 int length = 66; /* page length */ 66 int indent; /* indentation length */ 67 int npages = 1; 68 int literal; /* print control characters */ 69 char *name; /* user's login name */ 70 char *host; /* user's machine name */ 71 char *acctfile; /* accounting information file */ 72 73 int 74 main(argc, argv) 75 int argc; 76 char *argv[]; 77 { 78 register FILE *p = stdin, *o = stdout; 79 register int i, col; 80 register char *cp; 81 int done, linedone, maxrep; 82 char ch, *limit; 83 84 while (--argc) { 85 if (*(cp = *++argv) == '-') { 86 switch (cp[1]) { 87 case 'n': 88 argc--; 89 name = *++argv; 90 break; 91 92 case 'h': 93 argc--; 94 host = *++argv; 95 break; 96 97 case 'w': 98 if ((i = atoi(&cp[2])) > 0 && i <= MAXWIDTH) 99 width = i; 100 break; 101 102 case 'l': 103 length = atoi(&cp[2]); 104 break; 105 106 case 'i': 107 indent = atoi(&cp[2]); 108 break; 109 110 case 'c': /* Print control chars */ 111 literal++; 112 break; 113 } 114 } else 115 acctfile = cp; 116 } 117 118 for (cp = buf[0], limit = buf[MAXREP]; cp < limit; *cp++ = ' '); 119 done = 0; 120 121 while (!done) { 122 col = indent; 123 maxrep = -1; 124 linedone = 0; 125 while (!linedone) { 126 switch (ch = getc(p)) { 127 case EOF: 128 linedone = done = 1; 129 ch = '\n'; 130 break; 131 132 case '\f': 133 lineno = length; 134 case '\n': 135 if (maxrep < 0) 136 maxrep = 0; 137 linedone = 1; 138 break; 139 140 case '\b': 141 if (--col < indent) 142 col = indent; 143 break; 144 145 case '\r': 146 col = indent; 147 break; 148 149 case '\t': 150 col = ((col - indent) | 07) + indent + 1; 151 break; 152 153 case '\031': 154 /* 155 * lpd needs to use a different filter to 156 * print data so stop what we are doing and 157 * wait for lpd to restart us. 158 */ 159 if ((ch = getchar()) == '\1') { 160 fflush(stdout); 161 kill(getpid(), SIGSTOP); 162 break; 163 } else { 164 ungetc(ch, stdin); 165 ch = '\031'; 166 } 167 168 default: 169 if (col >= width || !literal && ch < ' ') { 170 col++; 171 break; 172 } 173 cp = &buf[0][col]; 174 for (i = 0; i < MAXREP; i++) { 175 if (i > maxrep) 176 maxrep = i; 177 if (*cp == ' ') { 178 *cp = ch; 179 if (col > maxcol[i]) 180 maxcol[i] = col; 181 break; 182 } 183 cp += MAXWIDTH; 184 } 185 col++; 186 break; 187 } 188 } 189 190 /* print out lines */ 191 for (i = 0; i <= maxrep; i++) { 192 for (cp = buf[i], limit = cp+maxcol[i]; cp <= limit;) { 193 putc(*cp, o); 194 *cp++ = ' '; 195 } 196 if (i < maxrep) 197 putc('\r', o); 198 else 199 putc(ch, o); 200 if (++lineno >= length) { 201 fflush(o); 202 npages++; 203 lineno = 0; 204 } 205 maxcol[i] = -1; 206 } 207 } 208 if (lineno) { /* be sure to end on a page boundary */ 209 putchar('\f'); 210 npages++; 211 } 212 if (name && acctfile && access(acctfile, 02) >= 0 && 213 freopen(acctfile, "a", stdout) != NULL) { 214 printf("%7.2f\t%s:%s\n", (float)npages, host, name); 215 } 216 exit(0); 217 } 218