269 lines
6.3 KiB
C
269 lines
6.3 KiB
C
/* $NetBSD: dev_mkdb.c,v 1.29 2012/06/03 21:42:47 joerg 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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__RCSID("$NetBSD: dev_mkdb.c,v 1.29 2012/06/03 21:42:47 joerg Exp $");
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include <cdbw.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 <paths.h>
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#include <search.h>
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#include <stdint.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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#include <util.h>
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#define HASH_SIZE 65536
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#define FILE_PERMISSION S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH
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static struct cdbw *db;
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static DB *db_compat;
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static const char *db_name;
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static char *db_name_tmp;
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static void usage(void) __dead;
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static void
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cdb_open(void)
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{
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db = cdbw_open();
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if (db == NULL)
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err(1, "opening cdb writer failed");
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}
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static void
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cdb_close(void)
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{
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int fd;
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fd = open(db_name_tmp, O_CREAT|O_EXCL|O_WRONLY, FILE_PERMISSION);
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if (fd == -1)
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err(1, "opening %s failed", db_name_tmp);
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if (cdbw_output(db, fd, "NetBSD6 devdb", NULL))
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err(1, "failed to write temporary database %s", db_name_tmp);
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cdbw_close(db);
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db = NULL;
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if (close(fd))
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err(1, "failed to write temporary database %s", db_name_tmp);
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}
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static void
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cdb_add_entry(dev_t dev, mode_t type, const char *relpath)
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{
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uint8_t *buf;
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size_t len;
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len = strlen(relpath) + 1;
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buf = malloc(len + 10);
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le64enc(buf, dev);
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le16enc(buf + 8, type);
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memcpy(buf + 10, relpath, len);
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cdbw_put(db, buf, 10, buf, len + 10);
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free(buf);
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}
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static void
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compat_open(void)
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{
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static 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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db_compat = dbopen(db_name_tmp, O_CREAT|O_EXCL|O_EXLOCK|O_RDWR|O_TRUNC,
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FILE_PERMISSION, DB_HASH, &openinfo);
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if (db_compat == NULL)
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err(1, "failed to create temporary database %s",
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db_name_tmp);
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}
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static void
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compat_close(void)
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{
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if ((*db_compat->close)(db_compat))
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err(1, "failed to write temporary database %s", db_name_tmp);
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}
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static void
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compat_add_entry(dev_t dev, mode_t type, const char *relpath)
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{
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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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struct {
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mode_t type;
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dev_t dev;
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} bkey;
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struct {
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mode_t type;
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int32_t dev;
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} obkey;
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DBT data, key;
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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 = __UNCONST(relpath);
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data.size = strlen(relpath) + 1;
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bkey.type = type;
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bkey.dev = dev;
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if ((*db_compat->put)(db_compat, &key, &data, 0))
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err(1, "failed to write temporary database %s", db_name_tmp);
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/*
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* If the device fits into the old 32bit format, add compat entry
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* for pre-NetBSD6 libc.
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*/
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if ((dev_t)(int32_t)dev != dev)
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return;
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(void)memset(&obkey, 0, sizeof(obkey));
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key.data = &obkey;
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key.size = sizeof(obkey);
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data.data = __UNCONST(relpath);
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data.size = strlen(relpath) + 1;
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obkey.type = type;
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obkey.dev = (int32_t)dev;
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if ((*db_compat->put)(db_compat, &key, &data, 0))
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err(1, "failed to write temporary database %s", db_name_tmp);
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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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FTS *ftsp;
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FTSENT *p;
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int ch;
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char *pathv[2];
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size_t dlen;
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int compat_mode;
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setprogname(argv[0]);
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compat_mode = 0;
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while ((ch = getopt(argc, argv, "co:")) != -1)
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switch (ch) {
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case 'c':
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compat_mode = 1;
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break;
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case 'o':
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db_name = optarg;
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break;
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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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usage();
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pathv[1] = NULL;
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if (argc == 1)
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pathv[0] = argv[0];
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else
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pathv[0] = __UNCONST(_PATH_DEV);
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ftsp = fts_open(pathv, FTS_NOCHDIR | FTS_PHYSICAL, NULL);
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if (ftsp == NULL)
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err(1, "fts_open: %s", pathv[0]);
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if (db_name == NULL) {
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if (compat_mode)
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db_name = _PATH_DEVDB;
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else
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db_name = _PATH_DEVCDB;
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}
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easprintf(&db_name_tmp, "%s.XXXXXXX", db_name);
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mktemp(db_name_tmp);
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if (compat_mode)
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compat_open();
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else
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cdb_open();
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while ((p = fts_read(ftsp)) != NULL) {
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if (p->fts_info != FTS_DEFAULT)
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continue;
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st = p->fts_statp;
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if (!S_ISCHR(st->st_mode) && !S_ISBLK(st->st_mode))
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continue;
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dlen = strlen(pathv[0]);
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while (pathv[0][dlen] == '/')
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++dlen;
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if (compat_mode)
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compat_add_entry(st->st_rdev, st->st_mode & S_IFMT,
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p->fts_path + dlen);
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else
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cdb_add_entry(st->st_rdev, st->st_mode & S_IFMT,
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p->fts_path + dlen);
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}
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(void)fts_close(ftsp);
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if (compat_mode)
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compat_close();
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else
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cdb_close();
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if (rename(db_name_tmp, db_name) == -1)
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err(1, "rename %s to %s", db_name_tmp, db_name);
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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 [-c] [-o database] [directory]\n",
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getprogname());
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exit(1);
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}
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