NetBSD/usr.sbin/dev_mkdb/dev_mkdb.c

216 lines
5.7 KiB
C

/* $NetBSD: dev_mkdb.c,v 1.20 2003/08/07 11:25:18 agc Exp $ */
/*-
* 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1990, 1993\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "from: @(#)dev_mkdb.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: dev_mkdb.c,v 1.20 2003/08/07 11:25:18 agc Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <db.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fts.h>
#include <kvm.h>
#include <nlist.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int main __P((int, char *[]));
void usage __P((void));
HASHINFO openinfo = {
4096, /* bsize */
128, /* ffactor */
1024, /* nelem */
2048 * 1024, /* cachesize */
NULL, /* hash() */
0 /* lorder */
};
int
main(argc, argv)
int argc;
char *argv[];
{
struct stat *st;
struct {
mode_t type;
dev_t dev;
} bkey;
DB *db;
DBT data, key;
FTS *ftsp;
FTSENT *p;
int ch;
u_char buf[MAXPATHLEN + 1];
char dbtmp[MAXPATHLEN + 1];
char dbname[MAXPATHLEN + 1];
char *dbname_arg = NULL;
char *pathv[2];
char path_dev[MAXPATHLEN + 1] = _PATH_DEV;
char cur_dir[MAXPATHLEN + 1];
struct timeval tv;
char *q;
while ((ch = getopt(argc, argv, "o:")) != -1)
switch (ch) {
case 'o':
dbname_arg = optarg;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc == 1)
if (strlcpy(path_dev, argv[0], sizeof(path_dev)) >= sizeof(path_dev))
errx(1, "device path too long");
if (argc > 1)
usage();
if (!getcwd(cur_dir, sizeof(cur_dir)))
err(1, "%s", cur_dir);
if (chdir(path_dev))
err(1, "%s", path_dev);
pathv[0] = path_dev;
pathv[1] = NULL;
ftsp = fts_open(pathv, FTS_PHYSICAL, NULL);
if (ftsp == NULL)
err(1, "fts_open: %s", path_dev);
if (chdir(cur_dir))
err(1, "%s", cur_dir);
if (dbname_arg) {
if (strlcpy(dbname, dbname_arg, sizeof(dbname)) >= sizeof(dbname))
errx(1, "dbname too long");
} else {
if (snprintf(dbname, sizeof(dbname), "%sdev.db", _PATH_VARRUN) >= sizeof(dbname))
errx(1, "dbname too long");
}
/*
* We use rename() to produce the dev.db file from a temporary file,
* and rename() is not able to move files across filesystems. Hence we
* need the temporary file to be in the same directory as dev.db.
*
* Additionally, we might be working in a world writable directory,
* we must ensure that we are not opening an existing file, therefore
* the loop on dbopen.
*/
(void)strlcpy(dbtmp, dbname, sizeof(dbtmp));
q = dbtmp + strlen(dbtmp);
do {
(void)gettimeofday(&tv, NULL);
(void)snprintf(q, sizeof(dbtmp) - (q - dbtmp),
"%ld.tmp", tv.tv_usec);
db = dbopen(dbtmp, O_CREAT|O_EXCL|O_EXLOCK|O_RDWR|O_TRUNC,
S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, DB_HASH, &openinfo);
} while (!db && (errno == EEXIST));
if (db == NULL)
err(1, "%s", dbtmp);
/*
* Keys are a mode_t followed by a dev_t. The former is the type of
* the file (mode & S_IFMT), the latter is the st_rdev field. Note
* that the structure may contain padding, so we have to clear it
* out here.
*/
memset(&bkey, 0, sizeof(bkey));
key.data = &bkey;
key.size = sizeof(bkey);
data.data = buf;
while ((p = fts_read(ftsp)) != NULL) {
switch (p->fts_info) {
case FTS_DEFAULT:
st = p->fts_statp;
break;
default:
continue;
}
/* Create the key. */
if (S_ISCHR(st->st_mode))
bkey.type = S_IFCHR;
else if (S_ISBLK(st->st_mode))
bkey.type = S_IFBLK;
else
continue;
bkey.dev = st->st_rdev;
/*
* Create the data; nul terminate the name so caller doesn't
* have to. Skip path_dev and slash.
*/
strlcpy(buf, p->fts_path + (strlen(path_dev) + 1), sizeof(buf));
data.size = p->fts_pathlen - (strlen(path_dev) + 1) + 1;
if ((*db->put)(db, &key, &data, 0)) {
err(1, "dbput %s", dbtmp);
}
}
(void)(*db->close)(db);
fts_close(ftsp);
if (chdir(cur_dir))
err(1, "%s", cur_dir);
if (rename(dbtmp, dbname))
err(1, "rename %s to %s", dbtmp, dbname);
exit(0);
}
void
usage()
{
(void)fprintf(stderr, "usage: dev_mkdb [-o database] [directory]\n");
exit(1);
}