usr.bin/soelim/soelim.c

   1 /*
   2  * Copyright (c) 1980, 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) 1980, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)soelim.c 8.1 (Berkeley) 6/6/93
  35  * $FreeBSD: src/usr.bin/soelim/soelim.c,v 1.3.2.2 2001/07/30 10:16:46 dd Exp $
  36  * $DragonFly: src/usr.bin/soelim/soelim.c,v 1.5 2004/09/30 10:08:46 joerg Exp $
  37  */
  38
  39 #include <err.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 /*
  44  * soelim - a filter to process n/troff input eliminating .so's
  45  *
  46  * Author: Bill Joy UCB July 8, 1977
  47  *
  48  * This program eliminates .so's from a n/troff input stream.
  49  * It can be used to prepare safe input for submission to the
  50  * phototypesetter since the software supporting the operator
  51  * doesn't let him do chdir.
  52  *
  53  * This is a kludge and the operator should be given the
  54  * ability to do chdir.
  55  *
  56  * This program is more generally useful, it turns out, because
  57  * the program tbl doesn't understand ".so" directives.
  58  */
  59
  60 #define STDIN_NAME      "-"
  61
  62 static int      process(const char *);
  63
  64 int
  65 main(int argc, const char **argv)
  66 {
  67         int errs = 0;
  68
  69         if (argc == 1) {
  70                 argv[0] = STDIN_NAME;
  71         } else {
  72                 argv++;
  73                 argc--;
  74         }
  75
  76         while (--argc >= 0) {
  77                 errs += process(argv[0]);
  78                 argv++;
  79         }
  80         exit(errs != 0);
  81 }
  82
  83 static int
  84 process(const char *file)
  85 {
  86         char *cp;
  87         int c;
  88         char fname[BUFSIZ];
  89         FILE *soee;
  90         int isfile;
  91
  92         if (!strcmp(file, STDIN_NAME)) {
  93                 soee = stdin;
  94         } else {
  95                 soee = fopen(file, "r");
  96                 if (soee == NULL) {
  97                         warn("%s", file);
  98                         return(-1);
  99                 }
 100         }
 101         for (;;) {
 102                 c = getc(soee);
 103                 if (c == EOF)
 104                         break;
 105                 if (c != '.')
 106                         goto simple;
 107                 c = getc(soee);
 108                 if (c != 's') {
 109                         putchar('.');
 110                         goto simple;
 111                 }
 112                 c = getc(soee);
 113                 if (c != 'o') {
 114                         printf(".s");
 115                         goto simple;
 116                 }
 117                 do
 118                         c = getc(soee);
 119                 while (c == ' ' || c == '\t');
 120                 cp = fname;
 121                 isfile = 0;
 122                 for (;;) {
 123                         switch (c) {
 124
 125                         case ' ':
 126                         case '\t':
 127                         case '\n':
 128                         case EOF:
 129                                 goto donename;
 130
 131                         default:
 132                                 *cp++ = c;
 133                                 c = getc(soee);
 134                                 isfile++;
 135                                 continue;
 136                         }
 137                 }
 138 donename:
 139                 if (cp == fname) {
 140                         printf(".so");
 141                         goto simple;
 142                 }
 143                 *cp = 0;
 144                 if (process(fname) < 0)
 145                         if (isfile)
 146                                 printf(".so %s\n", fname);
 147                 continue;
 148 simple:
 149                 if (c == EOF)
 150                         break;
 151                 putchar(c);
 152                 if (c != '\n') {
 153                         c = getc(soee);
 154                         goto simple;
 155                 }
 156         }
 157         if (soee != stdin) {
 158                 fclose(soee);
 159         }
 160         return(0);
 161 }