soelim.c

   1 /*      $Id: soelim.c,v 1.6 2021/09/19 18:14:24 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 #if HAVE_ERR
  33 #include <err.h>
  34 #endif
  35 #include <limits.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #if HAVE_STRINGLIST
  40 #include <stringlist.h>
  41 #else
  42 #include "compat_stringlist.h"
  43 #endif
  44 #include <unistd.h>
  45
  46 #define C_OPTION 0x1
  47
  48 static StringList *includes;
  49
  50 static void
  51 usage(void)
  52 {
  53
  54         fprintf(stderr, "usage: soelim [-Crtv] [-I dir] [files]\n");
  55
  56         exit(EXIT_FAILURE);
  57 }
  58
  59 static FILE *
  60 soelim_fopen(const char *name)
  61 {
  62         FILE *f;
  63         char path[PATH_MAX];
  64         size_t i;
  65
  66         if (strcmp(name, "-") == 0)
  67                 return (stdin);
  68
  69         if ((f = fopen(name, "r")) != NULL)
  70                 return (f);
  71
  72         if (*name == '/') {
  73                 warn("can't open '%s'", name);
  74                 return (NULL);
  75         }
  76
  77         for (i = 0; i < includes->sl_cur; i++) {
  78                 snprintf(path, sizeof(path), "%s/%s", includes->sl_str[i],
  79                     name);
  80                 if ((f = fopen(path, "r")) != NULL)
  81                         return (f);
  82         }
  83
  84         warn("can't open '%s'", name);
  85
  86         return (f);
  87 }
  88
  89 static int
  90 soelim_file(FILE *f, int flag)
  91 {
  92         char *line = NULL;
  93         char *walk, *cp;
  94         size_t linecap = 0;
  95         ssize_t linelen;
  96
  97         if (f == NULL)
  98                 return (1);
  99
 100         while ((linelen = getline(&line, &linecap, f)) > 0) {
 101                 if (strncmp(line, ".so", 3) != 0) {
 102                         printf("%s", line);
 103                         continue;
 104                 }
 105
 106                 walk = line + 3;
 107                 if (!isspace((unsigned char)*walk) && (flag & C_OPTION) == 0) {
 108                         printf("%s", line);
 109                         continue;
 110                 }
 111
 112                 while (isspace((unsigned char)*walk))
 113                         walk++;
 114
 115                 cp = walk;
 116                 while (*cp != '\0' && !isspace((unsigned char)*cp))
 117                         cp++;
 118                 *cp = 0;
 119                 if (cp < line + linelen)
 120                         cp++;
 121
 122                 if (*walk == '\0') {
 123                         printf("%s", line);
 124                         continue;
 125                 }
 126                 if (soelim_file(soelim_fopen(walk), flag) == 1) {
 127                         free(line);
 128                         return (1);
 129                 }
 130                 if (*cp != '\0')
 131                         printf("%s", cp);
 132         }
 133
 134         free(line);
 135         fclose(f);
 136
 137         return (0);
 138 }
 139
 140 int
 141 main(int argc, char **argv)
 142 {
 143         int ch, i;
 144         int ret = 0;
 145         int flags = 0;
 146
 147         includes = sl_init();
 148         if (includes == NULL)
 149                 err(EXIT_FAILURE, "sl_init()");
 150
 151         while ((ch = getopt(argc, argv, "CrtvI:")) != -1) {
 152                 switch (ch) {
 153                 case 'C':
 154                         flags |= C_OPTION;
 155                         break;
 156                 case 'r':
 157                 case 'v':
 158                 case 't':
 159                         /* stub compatibility with groff's soelim */
 160                         break;
 161                 case 'I':
 162                         sl_add(includes, optarg);
 163                         break;
 164                 default:
 165                         sl_free(includes, 0);
 166                         usage();
 167                 }
 168         }
 169
 170         argc -= optind;
 171         argv += optind;
 172
 173         if (argc == 0)
 174                 ret = soelim_file(stdin, flags);
 175
 176         for (i = 0; i < argc; i++)
 177                 ret = soelim_file(soelim_fopen(argv[i]), flags);
 178
 179         sl_free(includes, 0);
 180
 181         return (ret);
 182 }