soelim.c

   1 /*      $Id: soelim.c,v 1.4 2015/05/21 00:18:52 schwarze Exp $  */
   2 /*
   3  * Copyright (c) 2014 Baptiste Daroussin <bapt@FreeBSD.org>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer
  11  *    in this position and unchanged.
  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  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27 #include "config.h"
  28
  29 #include <sys/types.h>
  30
  31 #include <ctype.h>
  32 #include <err.h>
  33 #include <limits.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #if HAVE_STRINGLIST
  38 #include <stringlist.h>
  39 #else
  40 #include "compat_stringlist.h"
  41 #endif
  42 #include <unistd.h>
  43
  44 #define C_OPTION 0x1
  45
  46 static StringList *includes;
  47
  48 static void
  49 usage(void)
  50 {
  51
  52         fprintf(stderr, "usage: soelim [-Crtv] [-I dir] [files]\n");
  53
  54         exit(EXIT_FAILURE);
  55 }
  56
  57 static FILE *
  58 soelim_fopen(const char *name)
  59 {
  60         FILE *f;
  61         char path[PATH_MAX];
  62         size_t i;
  63
  64         if (strcmp(name, "-") == 0)
  65                 return (stdin);
  66
  67         if ((f = fopen(name, "r")) != NULL)
  68                 return (f);
  69
  70         if (*name == '/') {
  71                 warn("can't open '%s'", name);
  72                 return (NULL);
  73         }
  74
  75         for (i = 0; i < includes->sl_cur; i++) {
  76                 snprintf(path, sizeof(path), "%s/%s", includes->sl_str[i],
  77                     name);
  78                 if ((f = fopen(path, "r")) != NULL)
  79                         return (f);
  80         }
  81
  82         warn("can't open '%s'", name);
  83
  84         return (f);
  85 }
  86
  87 static int
  88 soelim_file(FILE *f, int flag)
  89 {
  90         char *line = NULL;
  91         char *walk, *cp;
  92         size_t linecap = 0;
  93         ssize_t linelen;
  94
  95         if (f == NULL)
  96                 return (1);
  97
  98         while ((linelen = getline(&line, &linecap, f)) > 0) {
  99                 if (strncmp(line, ".so", 3) != 0) {
 100                         printf("%s", line);
 101                         continue;
 102                 }
 103
 104                 walk = line + 3;
 105                 if (!isspace(*walk) && ((flag & C_OPTION) == 0)) {
 106                         printf("%s", line);
 107                         continue;
 108                 }
 109
 110                 while (isspace(*walk))
 111                         walk++;
 112
 113                 cp = walk;
 114                 while (*cp != '\0' && !isspace(*cp))
 115                         cp++;
 116                 *cp = 0;
 117                 if (cp < line + linelen)
 118                         cp++;
 119
 120                 if (*walk == '\0') {
 121                         printf("%s", line);
 122                         continue;
 123                 }
 124                 if (soelim_file(soelim_fopen(walk), flag) == 1) {
 125                         free(line);
 126                         return (1);
 127                 }
 128                 if (*cp != '\0')
 129                         printf("%s", cp);
 130         }
 131
 132         free(line);
 133         fclose(f);
 134
 135         return (0);
 136 }
 137
 138 int
 139 main(int argc, char **argv)
 140 {
 141         int ch, i;
 142         int ret = 0;
 143         int flags = 0;
 144
 145         includes = sl_init();
 146         if (includes == NULL)
 147                 err(EXIT_FAILURE, "sl_init()");
 148
 149         while ((ch = getopt(argc, argv, "CrtvI:")) != -1) {
 150                 switch (ch) {
 151                 case 'C':
 152                         flags |= C_OPTION;
 153                         break;
 154                 case 'r':
 155                 case 'v':
 156                 case 't':
 157                         /* stub compatibility with groff's soelim */
 158                         break;
 159                 case 'I':
 160                         sl_add(includes, optarg);
 161                         break;
 162                 default:
 163                         sl_free(includes, 0);
 164                         usage();
 165                 }
 166         }
 167
 168         argc -= optind;
 169         argv += optind;
 170
 171         if (argc == 0)
 172                 ret = soelim_file(stdin, flags);
 173
 174         for (i = 0; i < argc; i++)
 175                 ret = soelim_file(soelim_fopen(argv[i]), flags);
 176
 177         sl_free(includes, 0);
 178
 179         return (ret);
 180 }