usr.bin/soelim/soelim.c

   1 /*      $NetBSD: soelim.c,v 1.13 2004/01/05 23:23:37 jmmv Exp $ */
   2
   3 /*
   4  * Copyright (c) 1980, 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 #include <sys/cdefs.h>
  33 #ifndef lint
  34 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\
  35  The Regents of the University of California.  All rights reserved.");
  36 #endif /* not lint */
  37
  38 #ifndef lint
  39 #if 0
  40 static char sccsid[] = "@(#)soelim.c    8.1 (Berkeley) 6/6/93";
  41 #endif
  42 __RCSID("$NetBSD: soelim.c,v 1.13 2004/01/05 23:23:37 jmmv Exp $");
  43 #endif /* not lint */
  44
  45 /*
  46  * soelim - a filter to process n/troff input eliminating .so's
  47  *
  48  * Author: Bill Joy UCB July 8, 1977
  49  *
  50  * This program eliminates .so's from a n/troff input stream.
  51  * It can be used to prepare safe input for submission to the
  52  * phototypesetter since the software supporting the operator
  53  * doesn't let him do chdir.
  54  *
  55  * This is a kludge and the operator should be given the
  56  * ability to do chdir.
  57  *
  58  * This program is more generally useful, it turns out, because
  59  * the program tbl doesn't understand ".so" directives.
  60  */
  61 #include <sys/param.h>
  62 #include <err.h>
  63 #include <stdio.h>
  64 #include <stdlib.h>
  65 #include <string.h>
  66 #include <unistd.h>
  67
  68 #define STDIN_NAME      "-"
  69
  70 struct path {
  71         char **list;
  72         size_t n, c;
  73 };
  74
  75 static int       process(struct path *, const char *);
  76 static void      initpath(struct path *);
  77 static void      addpath(struct path *,  const char *);
  78 static FILE     *openpath(struct path *, const char *, const char *);
  79
  80 int     main(int, char **);
  81
  82
  83 static void
  84 initpath(struct path *p)
  85 {
  86         p->list = NULL;
  87         p->n = p->c = 0;
  88 }
  89
  90 static void
  91 addpath(struct path *p, const char *dir)
  92 {
  93         char **n;
  94
  95         if (p->list == NULL || p->n <= p->c - 2) {
  96                 n = realloc(p->list, (p->n + 10) * sizeof(p->list[0]));
  97                 if (n == NULL)
  98                         err(1, NULL);
  99                 p->list = n;
 100                 p->n += 10;
 101         }
 102
 103         if ((p->list[p->c++] = strdup(dir)) == NULL)
 104                 err(1, NULL);
 105
 106         p->list[p->c] = NULL;
 107 }
 108
 109 static FILE *
 110 openpath(struct path *p, const char *name, const char *parm)
 111 {
 112         char filename[MAXPATHLEN];
 113         const char *f;
 114         FILE *fp;
 115         size_t i;
 116
 117         if (*name == '/' || p->c == 0)
 118                 return fopen(name, parm);
 119
 120         for (i = 0; i < p->c; i++) {
 121                 if (p->list[i][0] == '\0')
 122                         f = name;
 123                 else {
 124                         (void)snprintf(filename, sizeof(filename), "%s/%s",
 125                             p->list[i], name);
 126                         f = filename;
 127                 }
 128                 if ((fp = fopen(f, parm)) != NULL)
 129                         return fp;
 130         }
 131         return NULL;
 132 }
 133
 134 int
 135 main(int argc, char *argv[])
 136 {
 137         struct path p;
 138         int c;
 139
 140         initpath(&p);
 141         addpath(&p, ".");
 142
 143         while ((c = getopt(argc, argv, "I:")) != -1)
 144                 switch (c) {
 145                 case 'I':
 146                         addpath(&p, optarg);
 147                         break;
 148                 default:
 149                         (void)fprintf(stderr,
 150                             "usage: %s [-I<dir>] [files...]\n",
 151                             getprogname());
 152                         exit(1);
 153                 }
 154
 155         argc -= optind;
 156         argv += optind;
 157
 158         if (argc == 0) {
 159                 (void)process(&p, STDIN_NAME);
 160                 exit(0);
 161         }
 162         do {
 163                 (void)process(&p, argv[0]);
 164                 argv++;
 165                 argc--;
 166         } while (argc > 0);
 167         exit(0);
 168 }
 169
 170 int
 171 process(struct path *p, const char *file)
 172 {
 173         char *cp;
 174         int c;
 175         char fname[BUFSIZ];
 176         FILE *soee;
 177         int isfile;
 178
 179         if (!strcmp(file, STDIN_NAME)) {
 180                 soee = stdin;
 181         } else {
 182                 soee = openpath(p, file, "r");
 183                 if (soee == NULL) {
 184                         warn("Cannot open `%s'", file);
 185                         return(-1);
 186                 }
 187         }
 188         for (;;) {
 189                 c = getc(soee);
 190                 if (c == EOF)
 191                         break;
 192                 if (c != '.')
 193                         goto simple;
 194                 c = getc(soee);
 195                 if (c != 's') {
 196                         putchar('.');
 197                         goto simple;
 198                 }
 199                 c = getc(soee);
 200                 if (c != 'o') {
 201                         printf(".s");
 202                         goto simple;
 203                 }
 204                 do
 205                         c = getc(soee);
 206                 while (c == ' ' || c == '\t');
 207                 cp = fname;
 208                 isfile = 0;
 209                 for (;;) {
 210                         switch (c) {
 211
 212                         case ' ':
 213                         case '\t':
 214                         case '\n':
 215                         case EOF:
 216                                 goto donename;
 217
 218                         default:
 219                                 *cp++ = c;
 220                                 c = getc(soee);
 221                                 isfile++;
 222                                 continue;
 223                         }
 224                 }
 225 donename:
 226                 if (cp == fname) {
 227                         printf(".so");
 228                         goto simple;
 229                 }
 230                 *cp = 0;
 231                 if (process(p, fname) < 0)
 232                         if (isfile)
 233                                 printf(".so %s\n", fname);
 234                 continue;
 235 simple:
 236                 if (c == EOF)
 237                         break;
 238                 putchar(c);
 239                 if (c != '\n') {
 240                         c = getc(soee);
 241                         goto simple;
 242                 }
 243         }
 244         if (soee != stdin) {
 245                 fclose(soee);
 246         }
 247         return(0);
 248 }