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dev_mkdb.c revision 1.8 
      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 
     34 #include <sys/cdefs.h>
     35 #ifndef lint
     36 __COPYRIGHT("@(#) Copyright (c) 1990, 1993\n\
     37 	The Regents of the University of California.  All rights reserved.\n");
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 #if 0
     42 static char sccsid[] = "from: @(#)dev_mkdb.c	8.1 (Berkeley) 6/6/93";
     43 #else
     44 __RCSID("$NetBSD: dev_mkdb.c,v 1.8 1997/10/18 08:18:00 lukem Exp $");
     45 #endif
     46 #endif /* not lint */
     47 
     48 #include <sys/param.h>
     49 #include <sys/stat.h>
     50 
     51 #include <db.h>
     52 #include <dirent.h>
     53 #include <err.h>
     54 #include <errno.h>
     55 #include <fcntl.h>
     56 #include <kvm.h>
     57 #include <nlist.h>
     58 #include <paths.h>
     59 #include <stdio.h>
     60 #include <stdlib.h>
     61 #include <string.h>
     62 #include <unistd.h>
     63 
     64 int	main __P((int, char **));
     65 void	usage __P((void));
     66 
     67 int
     68 main(argc, argv)
     69 	int argc;
     70 	char *argv[];
     71 {
     72 	DIR *dirp;
     73 	struct dirent *dp;
     74 	struct stat sb;
     75 	struct {
     76 		mode_t type;
     77 		dev_t dev;
     78 	} bkey;
     79 	DB *db;
     80 	DBT data, key;
     81 	int ch;
     82 	u_char buf[MAXNAMLEN + 1];
     83 	char dbtmp[MAXPATHLEN + 1], dbname[MAXPATHLEN + 1];
     84 
     85 	while ((ch = getopt(argc, argv, "")) != -1)
     86 		switch((char)ch) {
     87 		case '?':
     88 		default:
     89 			usage();
     90 		}
     91 	argc -= optind;
     92 	argv += optind;
     93 
     94 	if (argc > 0)
     95 		usage();
     96 
     97 	if (chdir(_PATH_DEV))
     98 		err(1, "%s", _PATH_DEV);
     99 
    100 	dirp = opendir(".");
    101 
    102 	(void)snprintf(dbtmp, sizeof(dbtmp), "%sdev.tmp", _PATH_VARRUN);
    103 	(void)snprintf(dbname, sizeof(dbtmp), "%sdev.db", _PATH_VARRUN);
    104 	db = dbopen(dbtmp, O_CREAT|O_EXLOCK|O_RDWR|O_TRUNC,
    105 	    S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, DB_HASH, NULL);
    106 	if (db == NULL)
    107 		err(1, "%s", dbtmp);
    108 
    109 	/*
    110 	 * Keys are a mode_t followed by a dev_t.  The former is the type of
    111 	 * the file (mode & S_IFMT), the latter is the st_rdev field.  Note
    112 	 * that the structure may contain padding, so we have to clear it
    113 	 * out here.
    114 	 */
    115 	memset(&bkey, 0, sizeof(bkey));
    116 	key.data = &bkey;
    117 	key.size = sizeof(bkey);
    118 	data.data = buf;
    119 	while ((dp = readdir(dirp)) != NULL) {
    120 		if (lstat(dp->d_name, &sb)) {
    121 			warn("%s", dp->d_name);
    122 			continue;
    123 		}
    124 
    125 		/* Create the key. */
    126 		if (S_ISCHR(sb.st_mode))
    127 			bkey.type = S_IFCHR;
    128 		else if (S_ISBLK(sb.st_mode))
    129 			bkey.type = S_IFBLK;
    130 		else
    131 			continue;
    132 		bkey.dev = sb.st_rdev;
    133 
    134 		/*
    135 		 * Create the data; nul terminate the name so caller doesn't
    136 		 * have to.
    137 		 */
    138 		memmove(buf, dp->d_name, dp->d_namlen);
    139 		buf[dp->d_namlen] = '\0';
    140 		data.size = dp->d_namlen + 1;
    141 		if ((db->put)(db, &key, &data, 0))
    142 			err(1, "dbput %s", dbtmp);
    143 	}
    144 	(void)(db->close)(db);
    145 	if (rename(dbtmp, dbname))
    146 		err(1, "rename %s to %s", dbtmp, dbname);
    147 	exit(0);
    148 }
    149 
    150 void
    151 usage()
    152 {
    153 
    154 	(void)fprintf(stderr, "usage: dev_mkdb\n");
    155 	exit(1);
    156 }
    157