apropos.c

   1 /*      $Id: apropos.c,v 1.35 2013/12/27 18:51:25 schwarze 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         struct manpaths  paths;
  41         char            *defpaths, *auxpaths;
  42         char            *conf_file;
  43         char            *progname;
  44         extern char     *optarg;
  45         extern int       optind;
  46
  47         progname = strrchr(argv[0], '/');
  48         if (progname == NULL)
  49                 progname = argv[0];
  50         else
  51                 ++progname;
  52
  53         whatis = (0 == strncmp(progname, "whatis", 6));
  54
  55         memset(&paths, 0, sizeof(struct manpaths));
  56         memset(&search, 0, sizeof(struct mansearch));
  57
  58         auxpaths = defpaths = NULL;
  59         conf_file = NULL;
  60
  61         while (-1 != (ch = getopt(argc, argv, "C:M:m:S:s:")))
  62                 switch (ch) {
  63                 case ('C'):
  64                         conf_file = optarg;
  65                         break;
  66                 case ('M'):
  67                         defpaths = optarg;
  68                         break;
  69                 case ('m'):
  70                         auxpaths = optarg;
  71                         break;
  72                 case ('S'):
  73                         search.arch = optarg;
  74                         break;
  75                 case ('s'):
  76                         search.sec = optarg;
  77                         break;
  78                 default:
  79                         goto usage;
  80                 }
  81
  82         argc -= optind;
  83         argv += optind;
  84
  85         if (0 == argc)
  86                 goto usage;
  87
  88         search.deftype = whatis ? TYPE_Nm : TYPE_Nm | TYPE_Nd;
  89         search.flags = whatis ? MANSEARCH_WHATIS : 0;
  90
  91         manpath_parse(&paths, conf_file, defpaths, auxpaths);
  92         ch = mansearch(&search, &paths, argc, argv, &res, &sz);
  93         manpath_free(&paths);
  94
  95         if (0 == ch)
  96                 goto usage;
  97
  98         for (i = 0; i < sz; i++) {
  99                 printf("%s - %s\n", res[i].names, res[i].desc);
 100                 free(res[i].file);
 101                 free(res[i].names);
 102                 free(res[i].desc);
 103         }
 104
 105         free(res);
 106         return(sz ? EXIT_SUCCESS : EXIT_FAILURE);
 107 usage:
 108         fprintf(stderr, "usage: %s [-C file] [-M path] [-m path] "
 109                         "[-S arch] [-s section]%s ...\n", progname,
 110                         whatis ? " name" : "\n               expression");
 111         return(EXIT_FAILURE);
 112 }