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dev_mkdb.c revision 1.3 
      1 /*-
      2  * Copyright (c) 1990 The Regents of the University of California.
      3  * 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 char copyright[] =
     36 "@(#) Copyright (c) 1990 The Regents of the University of California.\n\
     37  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 /*static char sccsid[] = "from: @(#)dev_mkdb.c	5.9 (Berkeley) 5/17/91";*/
     42 static char rcsid[] = "$Id: dev_mkdb.c,v 1.3 1993/08/01 17:59:57 mycroft Exp $";
     43 #endif /* not lint */
     44 
     45 #include <sys/param.h>
     46 #include <sys/stat.h>
     47 #include <fcntl.h>
     48 #undef DIRBLKSIZ
     49 #include <dirent.h>
     50 #include <nlist.h>
     51 #include <kvm.h>
     52 #include <db.h>
     53 #include <errno.h>
     54 #include <unistd.h>
     55 #include <stdio.h>
     56 #include <paths.h>
     57 #include <stdlib.h>
     58 #include <string.h>
     59 
     60 void error(), usage();
     61 
     62 main(argc, argv)
     63 	int argc;
     64 	char **argv;
     65 {
     66 	extern int optind;
     67 	register DIR *dirp;
     68 	register struct dirent *dp;
     69 	struct stat sb;
     70 	struct {
     71 		mode_t type;
     72 		dev_t dev;
     73 	} bkey;
     74 	DB *db;
     75 	DBT data, key;
     76 	int ch;
     77 	u_char buf[MAXNAMLEN + 1];
     78 	char dbtmp[MAXPATHLEN + 1], dbname[MAXPATHLEN + 1];
     79 
     80 	while ((ch = getopt(argc, argv, "")) != EOF)
     81 		switch((char)ch) {
     82 		case '?':
     83 		default:
     84 			usage();
     85 		}
     86 	argc -= optind;
     87 	argv += optind;
     88 
     89 	if (chdir(_PATH_DEV))
     90 		error(_PATH_DEV);
     91 
     92 	dirp = opendir(".");
     93 
     94 	(void)snprintf(dbtmp, sizeof(dbtmp), "%s/dev.tmp", _PATH_VARRUN);
     95 	(void)snprintf(dbname, sizeof(dbtmp), "%s/dev.db", _PATH_VARRUN);
     96 	db = dbopen(dbtmp, O_CREAT|O_RDWR|O_EXCL, DEFFILEMODE, DB_HASH,
     97 	    (HASHINFO *)NULL);
     98 	if (!db)
     99 		error(dbtmp);
    100 
    101 	/*
    102 	 * Keys are a mode_t followed by a dev_t.  The former is the type of
    103 	 * the file (mode & S_IFMT), the latter is the st_rdev field.
    104 	 */
    105 	key.data = &bkey;
    106 	key.size = sizeof(bkey);
    107 	data.data = buf;
    108 	while (dp = readdir(dirp)) {
    109 		if (stat(dp->d_name, &sb)) {
    110 			(void)fprintf(stderr, "dev_mkdb: can't stat %s\n",
    111 				dp->d_name);
    112 			continue;
    113 		}
    114 
    115 		/* Create the key. */
    116 		if (S_ISCHR(sb.st_mode))
    117 			bkey.type = S_IFCHR;
    118 		else if (S_ISBLK(sb.st_mode))
    119 			bkey.type = S_IFBLK;
    120 		else
    121 			continue;
    122 		bkey.dev = sb.st_rdev;
    123 
    124 		/*
    125 		 * Create the data; nul terminate the name so caller doesn't
    126 		 * have to.
    127 		 */
    128 		bcopy(dp->d_name, buf, dp->d_namlen);
    129 		buf[dp->d_namlen] = '\0';
    130 		data.size = dp->d_namlen + 1;
    131 		if ((db->put)(db, &key, &data, 0))
    132 			error(dbtmp);
    133 	}
    134 	(void)(db->close)(db);
    135 	if (rename(dbtmp, dbname)) {
    136 		(void)fprintf(stderr, "dev_mkdb: %s to %s: %s.\n",
    137 		    dbtmp, dbname, strerror(errno));
    138 		exit(1);
    139 	}
    140 	exit(0);
    141 }
    142 
    143 void
    144 error(n)
    145 	char *n;
    146 {
    147 	(void)fprintf(stderr, "dev_mkdb: %s: %s\n", n, strerror(errno));
    148 	exit(1);
    149 }
    150 
    151 void
    152 usage()
    153 {
    154 	(void)fprintf(stderr, "usage: dev_mkdb\n");
    155 	exit(1);
    156 }
    157