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kvm_mkdb.c revision 1.11 
      1 /*	$NetBSD: kvm_mkdb.c,v 1.11 1996/09/30 19:48:44 cgd Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
      5  * Copyright (c) 1990, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  */
     36 
     37 #ifndef lint
     38 static char copyright[] =
     39 "@(#) Copyright (c) 1990, 1993\n\
     40 	The Regents of the University of California.  All rights reserved.\n";
     41 #endif /* not lint */
     42 
     43 #ifndef lint
     44 #if 0
     45 static char sccsid[] = "from: @(#)kvm_mkdb.c	8.3 (Berkeley) 5/4/95";
     46 #else
     47 static char *rcsid = "$NetBSD: kvm_mkdb.c,v 1.11 1996/09/30 19:48:44 cgd Exp $";
     48 #endif
     49 #endif /* not lint */
     50 
     51 #include <sys/param.h>
     52 #include <sys/stat.h>
     53 
     54 #include <db.h>
     55 #include <err.h>
     56 #include <errno.h>
     57 #include <fcntl.h>
     58 #include <paths.h>
     59 #include <stdio.h>
     60 #include <stdlib.h>
     61 #include <string.h>
     62 #include <unistd.h>
     63 
     64 #include "extern.h"
     65 
     66 static void usage __P((void));
     67 
     68 HASHINFO openinfo = {
     69 	4096,		/* bsize */
     70 	128,		/* ffactor */
     71 	1024,		/* nelem */
     72 	2048 * 1024,	/* cachesize */
     73 	NULL,		/* hash() */
     74 	0		/* lorder */
     75 };
     76 
     77 static DB *db;
     78 static char dbtemp[MAXPATHLEN];
     79 
     80 int
     81 main(argc, argv)
     82 	int argc;
     83 	char *argv[];
     84 {
     85 	int ch;
     86 	char *p, *nlistpath, *nlistname, dbname[MAXPATHLEN];
     87 
     88 	while ((ch = getopt(argc, argv, "")) != EOF)
     89 		switch (ch) {
     90 		case '?':
     91 		default:
     92 			usage();
     93 		}
     94 	argc -= optind;
     95 	argv += optind;
     96 
     97 	if (argc > 1)
     98 		usage();
     99 
    100 	/* If the existing db file matches the currently running kernel, exit */
    101 	if (testdb())
    102 		exit(0);
    103 
    104 #define	basename(cp)	((p = rindex((cp), '/')) != NULL ? p + 1 : (cp))
    105 	nlistpath = argc > 0 ? argv[0] : _PATH_UNIX;
    106 	nlistname = basename(nlistpath);
    107 
    108 	(void)snprintf(dbtemp, sizeof(dbtemp), "%skvm_%s.tmp",
    109 	    _PATH_VARDB, nlistname);
    110 	(void)snprintf(dbname, sizeof(dbname), "%skvm_%s.db",
    111 	    _PATH_VARDB, nlistname);
    112 	(void)umask(0);
    113 	db = dbopen(dbtemp, O_CREAT | O_EXLOCK | O_TRUNC | O_RDWR,
    114 	    S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH, DB_HASH, &openinfo);
    115 	if (db == NULL)
    116 		err(1, "%s", dbtemp);
    117 	create_knlist(nlistpath, db);
    118 	if (db->close(db)) {
    119 		warn("%s", dbtemp);
    120 		db = NULL;
    121 		punt();
    122 	}
    123 	db = NULL;
    124 	if (rename(dbtemp, dbname)) {
    125 		warn("rename %s to %s", dbtemp, dbname);
    126 		punt();
    127 	}
    128 	exit(0);
    129 }
    130 
    131 void
    132 usage()
    133 {
    134 	(void)fprintf(stderr, "usage: kvm_mkdb [file]\n");
    135 	exit(1);
    136 }
    137 
    138 void
    139 punt()
    140 {
    141 
    142 	if (db != NULL)
    143 		db->close(db);
    144 	unlink(dbtemp);
    145 	exit(1);
    146 }
    147