apropos.c

   1 /*      $Id: apropos.c,v 1.33 2012/06/09 17:49:13 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2012 Kristaps Dzonsons <kristaps@bsd.lv>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20 #include <sys/param.h>
  21
  22 #include <assert.h>
  23 #include <getopt.h>
  24 #include <stdint.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29
  30 #include "manpath.h"
  31 #include "mansearch.h"
  32
  33 int
  34 main(int argc, char *argv[])
  35 {
  36         int              ch, whatis;
  37         struct mansearch search;
  38         size_t           i, sz;
  39         struct manpage  *res;
  40         char            *conf_file, *defpaths, *auxpaths;
  41         struct manpaths  paths;
  42         char            *progname;
  43         extern char     *optarg;
  44         extern int       optind;
  45
  46         progname = strrchr(argv[0], '/');
  47         if (progname == NULL)
  48                 progname = argv[0];
  49         else
  50                 ++progname;
  51
  52         auxpaths = defpaths = conf_file = NULL;
  53         memset(&paths, 0, sizeof(struct manpaths));
  54         memset(&search, 0, sizeof(struct mansearch));
  55         whatis = (0 == strcmp(progname, "whatis"));
  56
  57         while (-1 != (ch = getopt(argc, argv, "C:M:m:S:s:")))
  58                 switch (ch) {
  59                 case ('C'):
  60                         conf_file = optarg;
  61                         break;
  62                 case ('M'):
  63                         defpaths = optarg;
  64                         break;
  65                 case ('m'):
  66                         auxpaths = optarg;
  67                         break;
  68                 case ('S'):
  69                         search.arch = optarg;
  70                         break;
  71                 case ('s'):
  72                         search.sec = optarg;
  73                         break;
  74                 default:
  75                         goto usage;
  76                 }
  77
  78         argc -= optind;
  79         argv += optind;
  80
  81         if (0 == argc)
  82                 goto usage;
  83
  84         search.deftype = whatis ? TYPE_Nm : TYPE_Nm | TYPE_Nd;
  85         search.flags = whatis ? MANSEARCH_WHATIS : 0;
  86
  87         manpath_parse(&paths, conf_file, defpaths, auxpaths);
  88         ch = mansearch(&search, &paths, argc, argv, &res, &sz);
  89         manpath_free(&paths);
  90
  91         if (0 == ch)
  92                 goto usage;
  93
  94         for (i = 0; i < sz; i++) {
  95                 printf("%s - %s\n", res[i].file, res[i].desc);
  96                 free(res[i].desc);
  97         }
  98
  99         free(res);
 100         return(sz ? EXIT_SUCCESS : EXIT_FAILURE);
 101 usage:
 102         fprintf(stderr, "usage: %s [-C conf] "
 103                                   "[-M paths] "
 104                                   "[-m paths] "
 105                                   "[-S arch] "
 106                                   "[-s section] "
 107                                   "expr ...\n",
 108                                   progname);
 109         return(EXIT_FAILURE);
 110 }