224 lines
5.9 KiB
C
224 lines
5.9 KiB
C
/* $NetBSD: dev_mkdb.c,v 1.27 2009/04/15 01:01:06 lukem Exp $ */
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1990, 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "from: @(#)dev_mkdb.c 8.1 (Berkeley) 6/6/93";
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#else
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__RCSID("$NetBSD: dev_mkdb.c,v 1.27 2009/04/15 01:01:06 lukem Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <db.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fts.h>
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#include <kvm.h>
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#include <nlist.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static void usage(void) __unused;
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HASHINFO openinfo = {
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4096, /* bsize */
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128, /* ffactor */
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1024, /* nelem */
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2048 * 1024, /* cachesize */
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NULL, /* hash() */
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0 /* lorder */
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};
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int
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main(int argc, char **argv)
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{
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struct stat *st;
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struct {
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mode_t type;
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dev_t dev;
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} bkey;
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DB *db;
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DBT data, key;
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FTS *ftsp;
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FTSENT *p;
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int ch;
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char buf[MAXPATHLEN + 1];
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char dbtmp[MAXPATHLEN + 1];
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char dbname[MAXPATHLEN + 1];
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char *dbname_arg = NULL;
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char *pathv[2];
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char path_dev[MAXPATHLEN + 1] = _PATH_DEV;
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char cur_dir[MAXPATHLEN + 1];
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struct timeval tv;
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char *q;
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size_t dlen;
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setprogname(argv[0]);
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while ((ch = getopt(argc, argv, "o:")) != -1)
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switch (ch) {
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case 'o':
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dbname_arg = optarg;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc == 1)
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if (strlcpy(path_dev, argv[0], sizeof(path_dev)) >=
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sizeof(path_dev))
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errx(1, "device path too long");
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if (argc > 1)
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usage();
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if (getcwd(cur_dir, sizeof(cur_dir)) == NULL)
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err(1, "%s", cur_dir);
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if (chdir(path_dev) == -1)
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err(1, "%s", path_dev);
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pathv[0] = path_dev;
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pathv[1] = NULL;
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dlen = strlen(path_dev) - 1;
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ftsp = fts_open(pathv, FTS_PHYSICAL, NULL);
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if (ftsp == NULL)
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err(1, "fts_open: %s", path_dev);
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if (chdir(cur_dir) == -1)
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err(1, "%s", cur_dir);
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if (dbname_arg) {
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if (strlcpy(dbname, dbname_arg, sizeof(dbname)) >=
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sizeof(dbname))
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errx(1, "dbname too long");
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} else {
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if (snprintf(dbname, sizeof(dbname), "%sdev.db",
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_PATH_VARRUN) >= (int)sizeof(dbname))
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errx(1, "dbname too long");
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}
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/*
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* We use rename() to produce the dev.db file from a temporary file,
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* and rename() is not able to move files across filesystems. Hence we
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* need the temporary file to be in the same directory as dev.db.
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*
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* Additionally, we might be working in a world writable directory,
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* we must ensure that we are not opening an existing file, therefore
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* the loop on dbopen.
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*/
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(void)strlcpy(dbtmp, dbname, sizeof(dbtmp));
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q = dbtmp + strlen(dbtmp);
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do {
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(void)gettimeofday(&tv, NULL);
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(void)snprintf(q, sizeof(dbtmp) - (q - dbtmp),
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"%ld.tmp", (long)tv.tv_usec);
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db = dbopen(dbtmp, O_CREAT|O_EXCL|O_EXLOCK|O_RDWR|O_TRUNC,
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S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, DB_HASH, &openinfo);
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} while (!db && (errno == EEXIST));
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if (db == NULL)
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err(1, "%s", dbtmp);
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/*
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* Keys are a mode_t followed by a dev_t. The former is the type of
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* the file (mode & S_IFMT), the latter is the st_rdev field. Note
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* that the structure may contain padding, so we have to clear it
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* out here.
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*/
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(void)memset(&bkey, 0, sizeof(bkey));
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key.data = &bkey;
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key.size = sizeof(bkey);
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data.data = (u_char *)(void *)buf;
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while ((p = fts_read(ftsp)) != NULL) {
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switch (p->fts_info) {
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case FTS_DEFAULT:
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st = p->fts_statp;
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break;
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default:
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continue;
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}
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/* Create the key. */
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if (S_ISCHR(st->st_mode))
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bkey.type = S_IFCHR;
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else if (S_ISBLK(st->st_mode))
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bkey.type = S_IFBLK;
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else
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continue;
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bkey.dev = st->st_rdev;
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/*
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* Create the data; nul terminate the name so caller doesn't
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* have to. Skip path_dev and slash. Handle old versions
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* of fts(3), that added multiple slashes, if the pathname
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* ended with a slash.
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*/
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while (p->fts_path[dlen] == '/')
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dlen++;
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(void)strlcpy(buf, p->fts_path + dlen, sizeof(buf));
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data.size = p->fts_pathlen - dlen + 1;
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if ((*db->put)(db, &key, &data, 0))
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err(1, "dbput %s", dbtmp);
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}
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(void)(*db->close)(db);
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(void)fts_close(ftsp);
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if (chdir(cur_dir) == -1)
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err(1, "%s", cur_dir);
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if (rename(dbtmp, dbname) == -1)
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err(1, "rename %s to %s", dbtmp, dbname);
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return 0;
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "Usage: %s [-o database] [directory]\n",
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getprogname());
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exit(1);
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}
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