usr.sbin/dev_mkdb/dev_mkdb.c

   1 /*-
   2  * Copyright (c) 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1990, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)dev_mkdb.c       8.1 (Berkeley) 6/6/93
  35  * $FreeBSD: src/usr.sbin/dev_mkdb/dev_mkdb.c,v 1.4.2.1 2001/11/25 18:34:09 iedowse Exp $
  36  * $DragonFly: src/usr.sbin/dev_mkdb/dev_mkdb.c,v 1.6 2005/08/08 16:49:48 joerg Exp $
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/stat.h>
  41
  42 #include <db.h>
  43 #include <dirent.h>
  44 #include <err.h>
  45 #include <fcntl.h>
  46 #include <kvm.h>
  47 #include <limits.h>
  48 #include <nlist.h>
  49 #include <paths.h>
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <string.h>
  53 #include <unistd.h>
  54
  55 static void     usage(void);
  56
  57 int
  58 main(int argc, char **argv)
  59 {
  60         DIR *dirp;
  61         struct dirent *dp;
  62         struct stat sb;
  63         struct {
  64                 mode_t type;
  65                 dev_t dev;
  66         } bkey;
  67         DB *db;
  68         DBT data, key;
  69         int ch, fflag;
  70         u_char buf[NAME_MAX + 1];
  71         char dbtmp[NAME_MAX + 1], dbname[NAME_MAX + 1];
  72         const char *dirname;
  73
  74         fflag = 0;
  75         while ((ch = getopt(argc, argv, "f:")) != -1)
  76                 switch((char)ch) {
  77                 case 'f':
  78                         strlcpy(dbname, optarg, sizeof(dbname));
  79                         fflag = 1;
  80                         break;
  81                 case '?':
  82                 default:
  83                         usage();
  84                 }
  85         argc -= optind;
  86         argv += optind;
  87
  88         if (argc > 1)
  89                 usage();
  90         if (argc == 1)
  91                 dirname = argv[0];
  92         else
  93                 dirname = _PATH_DEV;
  94
  95         if (!fflag) {
  96                 snprintf(dbname, sizeof(dbtmp), "%sdev.db", _PATH_VARRUN);
  97                 snprintf(dbtmp, sizeof(dbtmp), "%sdev.tmp", _PATH_VARRUN);
  98         } else
  99                 snprintf(dbtmp, sizeof(dbtmp), "%s.tmp", dbname);
 100
 101         if (chdir(dirname))
 102                 err(1, "%s", dirname);
 103
 104         dirp = opendir(".");
 105
 106         db = dbopen(dbtmp, O_CREAT|O_EXLOCK|O_RDWR|O_TRUNC,
 107             S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, DB_HASH, NULL);
 108         if (db == NULL)
 109                 err(1, "%s", dbtmp);
 110
 111         /*
 112          * Keys are a mode_t followed by a dev_t.  The former is the type of
 113          * the file (mode & S_IFMT), the latter is the st_rdev field.  Note
 114          * that the structure may contain padding, so we have to clear it
 115          * out here.
 116          */
 117         bzero(&bkey, sizeof(bkey));
 118         key.data = &bkey;
 119         key.size = sizeof(bkey);
 120         data.data = buf;
 121         while ((dp = readdir(dirp))) {
 122                 if (lstat(dp->d_name, &sb)) {
 123                         warn("%s", dp->d_name);
 124                         continue;
 125                 }
 126
 127                 /* Create the key. */
 128                 if (S_ISCHR(sb.st_mode))
 129                         bkey.type = S_IFCHR;
 130                 else if (S_ISBLK(sb.st_mode))
 131                         bkey.type = S_IFBLK;
 132                 else
 133                         continue;
 134                 bkey.dev = sb.st_rdev;
 135
 136                 /*
 137                  * Create the data; nul terminate the name so caller doesn't
 138                  * have to.
 139                  */
 140                 data.size = strlcpy(buf, dp->d_name, sizeof(buf)) + 1;
 141                 if (data.size > sizeof(buf))
 142                         err(1, "file name too long");
 143                 if ((db->put)(db, &key, &data, 0))
 144                         err(1, "dbput %s", dbtmp);
 145         }
 146         (db->close)(db);
 147         if (rename(dbtmp, dbname))
 148                 err(1, "rename %s to %s", dbtmp, dbname);
 149         exit(0);
 150 }
 151
 152 static void
 153 usage(void)
 154 {
 155         fprintf(stderr, "usage: dev_mkdb [-f file] [directory]\n");
 156         exit(1);
 157 }