freebsd-skq/usr.sbin/kvm_mkdb/kvm_mkdb.c
Poul-Henning Kamp bb04461ba0 Speed kvm_mkdb up by a factor 5 or thereabout. Rewrote all the fseek/fread
nonsense to use a mmap'ed file instead and told the DB/hash what we are up to.

dev_mkdb could maybe benefit from the same treatment.
1995-01-10 18:37:12 +00:00

120 lines
3.6 KiB
C

/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1990, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)kvm_mkdb.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <db.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "extern.h"
static void usage __P((void));
int
main(argc, argv)
int argc;
char *argv[];
{
DB *db;
int ch;
char *p, *nlistpath, *nlistname, dbtemp[MAXPATHLEN], dbname[MAXPATHLEN];
HASHINFO hdefault;
while ((ch = getopt(argc, argv, "")) != EOF)
switch (ch) {
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc > 1)
usage();
/* If the existing db file matches the currently running kernel, exit */
if (testdb())
exit(0);
#define basename(cp) ((p = rindex((cp), '/')) != NULL ? p + 1 : (cp))
nlistpath = argc > 0 ? argv[0] : (char *)getbootfile();
nlistname = basename(nlistpath);
(void)snprintf(dbtemp, sizeof(dbtemp), "%skvm_%s.tmp",
_PATH_VARDB, nlistname);
(void)snprintf(dbname, sizeof(dbname), "%skvm_%s.db",
_PATH_VARDB, nlistname);
(void)umask(0);
/* don't handicap db/hash by using the defaults... */
memset(&hdefault,0,sizeof hdefault);
hdefault.bsize = NBPG;
hdefault.cachesize = 50*NBPG;
hdefault.nelem = 1000;
db = dbopen(dbtemp, O_CREAT | O_EXLOCK | O_TRUNC | O_RDWR,
S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH, DB_HASH, &hdefault);
if (db == NULL)
err(1, "%s", dbtemp);
create_knlist(nlistpath, db);
if (db->close(db))
err(1, "%s", dbtemp);
if (rename(dbtemp, dbname))
err(1, "rename %s to %s", dbtemp, dbname);
exit(0);
}
void
usage()
{
(void)fprintf(stderr, "usage: kvm_mkdb [file]\n");
exit(1);
}