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dev_mkdb.c revision 1.5 
      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 #ifndef lint
     35 static char copyright[] =
     36 "@(#) 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 /*static char sccsid[] = "from: @(#)dev_mkdb.c	8.1 (Berkeley) 6/6/93";*/
     42 static char rcsid[] = "$Id: dev_mkdb.c,v 1.5 1995/01/30 21:12:44 mycroft Exp $";
     43 #endif /* not lint */
     44 
     45 #include <sys/param.h>
     46 #include <sys/stat.h>
     47 
     48 #include <db.h>
     49 #include <dirent.h>
     50 #include <err.h>
     51 #include <errno.h>
     52 #include <fcntl.h>
     53 #include <kvm.h>
     54 #include <nlist.h>
     55 #include <paths.h>
     56 #include <stdio.h>
     57 #include <stdlib.h>
     58 #include <string.h>
     59 #include <unistd.h>
     60 
     61 void	usage __P((void));
     62 
     63 int
     64 main(argc, argv)
     65 	int argc;
     66 	char *argv[];
     67 {
     68 	register DIR *dirp;
     69 	register struct dirent *dp;
     70 	struct stat sb;
     71 	struct {
     72 		mode_t type;
     73 		dev_t dev;
     74 	} bkey;
     75 	DB *db;
     76 	DBT data, key;
     77 	int ch;
     78 	u_char buf[MAXNAMLEN + 1];
     79 	char dbtmp[MAXPATHLEN + 1], dbname[MAXPATHLEN + 1];
     80 
     81 	while ((ch = getopt(argc, argv, "")) != EOF)
     82 		switch((char)ch) {
     83 		case '?':
     84 		default:
     85 			usage();
     86 		}
     87 	argc -= optind;
     88 	argv += optind;
     89 
     90 	if (argc > 0)
     91 		usage();
     92 
     93 	if (chdir(_PATH_DEV))
     94 		err(1, "%s", _PATH_DEV);
     95 
     96 	dirp = opendir(".");
     97 
     98 	(void)snprintf(dbtmp, sizeof(dbtmp), "%sdev.tmp", _PATH_VARRUN);
     99 	(void)snprintf(dbname, sizeof(dbtmp), "%sdev.db", _PATH_VARRUN);
    100 	db = dbopen(dbtmp, O_CREAT|O_EXLOCK|O_RDWR|O_TRUNC,
    101 	    S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, DB_HASH, NULL);
    102 	if (db == NULL)
    103 		err(1, "%s", dbtmp);
    104 
    105 	/*
    106 	 * Keys are a mode_t followed by a dev_t.  The former is the type of
    107 	 * the file (mode & S_IFMT), the latter is the st_rdev field.  Note
    108 	 * that the structure may contain padding, so we have to clear it
    109 	 * out here.
    110 	 */
    111 	bzero(&bkey, sizeof(bkey));
    112 	key.data = &bkey;
    113 	key.size = sizeof(bkey);
    114 	data.data = buf;
    115 	while (dp = readdir(dirp)) {
    116 		if (lstat(dp->d_name, &sb)) {
    117 			warn("%s", dp->d_name);
    118 			continue;
    119 		}
    120 
    121 		/* Create the key. */
    122 		if (S_ISCHR(sb.st_mode))
    123 			bkey.type = S_IFCHR;
    124 		else if (S_ISBLK(sb.st_mode))
    125 			bkey.type = S_IFBLK;
    126 		else
    127 			continue;
    128 		bkey.dev = sb.st_rdev;
    129 
    130 		/*
    131 		 * Create the data; nul terminate the name so caller doesn't
    132 		 * have to.
    133 		 */
    134 		bcopy(dp->d_name, buf, dp->d_namlen);
    135 		buf[dp->d_namlen] = '\0';
    136 		data.size = dp->d_namlen + 1;
    137 		if ((db->put)(db, &key, &data, 0))
    138 			err(1, "dbput %s", dbtmp);
    139 	}
    140 	(void)(db->close)(db);
    141 	if (rename(dbtmp, dbname))
    142 		err(1, "rename %s to %s", dbtmp, dbname);
    143 	exit(0);
    144 }
    145 
    146 void
    147 usage()
    148 {
    149 
    150 	(void)fprintf(stderr, "usage: dev_mkdb\n");
    151 	exit(1);
    152 }
    153