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/* $OpenBSD: dev_mkdb.c,v 1.16 2018/08/09 14:30:28 deraadt 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/stat.h>
#include <db.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
void usage(void);
int
main(int argc, char *argv[])
{
DIR *dirp;
struct dirent *dp;
struct stat sb;
struct {
mode_t type;
dev_t dev;
} bkey;
DB *db;
DBT data, key;
HASHINFO info;
int ch;
u_char buf[MAXNAMLEN + 1];
char dbtmp[PATH_MAX], dbname[PATH_MAX];
if (pledge("stdio rpath wpath cpath flock", NULL) == -1)
err(1, "pledge");
while ((ch = getopt(argc, argv, "")) != -1)
switch(ch) {
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc > 0)
usage();
if (chdir(_PATH_DEV))
err(1, "%s", _PATH_DEV);
dirp = opendir(".");
(void)snprintf(dbtmp, sizeof(dbtmp), "%sdev.tmp", _PATH_VARRUN);
(void)snprintf(dbname, sizeof(dbname), "%sdev.db", _PATH_VARRUN);
bzero(&info, sizeof(info));
info.bsize = 8192;
db = dbopen(dbtmp, O_CREAT|O_EXLOCK|O_RDWR|O_TRUNC,
S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, DB_HASH, &info);
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.
*/
bzero(&bkey, sizeof(bkey));
key.data = &bkey;
key.size = sizeof(bkey);
data.data = buf;
while ((dp = readdir(dirp))) {
if (lstat(dp->d_name, &sb)) {
warn("%s", dp->d_name);
continue;
}
/* Create the key. */
if (S_ISCHR(sb.st_mode))
bkey.type = S_IFCHR;
else if (S_ISBLK(sb.st_mode))
bkey.type = S_IFBLK;
else
continue;
bkey.dev = sb.st_rdev;
/*
* Create the data; nul terminate the name so caller doesn't
* have to.
*/
bcopy(dp->d_name, buf, dp->d_namlen);
buf[dp->d_namlen] = '\0';
data.size = dp->d_namlen + 1;
if ((db->put)(db, &key, &data, 0))
err(1, "dbput %s", dbtmp);
}
(void)(db->close)(db);
if (rename(dbtmp, dbname))
err(1, "rename %s to %s", dbtmp, dbname);
return (0);
}
void
usage(void)
{
(void)fprintf(stderr, "usage: dev_mkdb\n");
exit(1);
}
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