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jcs's openbsd hax
openbsd
1/* $OpenBSD: dev_mkdb.c,v 1.21 2025/10/27 16:17:08 deraadt Exp $ */
2
3/*-
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/stat.h>
33
34#include <db.h>
35#include <err.h>
36#include <errno.h>
37#include <fcntl.h>
38#include <fts.h>
39#include <paths.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <unistd.h>
44
45void usage(void);
46
47int
48main(int argc, char *argv[])
49{
50 FTS *fts;
51 FTSENT *dp;
52 char *paths[] = { ".", NULL };
53 struct {
54 mode_t type;
55 dev_t dev;
56 } bkey;
57 DB *db;
58 DBT data, key;
59 HASHINFO info;
60 int ch;
61 char dbtmp[PATH_MAX], dbname[PATH_MAX];
62
63 (void)snprintf(dbtmp, sizeof(dbtmp), "%sdev.tmp", _PATH_VARRUN);
64 (void)snprintf(dbname, sizeof(dbname), "%sdev.db", _PATH_VARRUN);
65
66 if (unveil(_PATH_DEV, "r") == -1)
67 err(1, "unveil %s", _PATH_DEV);
68 if (unveil(dbtmp, "rwc") == -1)
69 err(1, "unveil %s", dbtmp);
70 if (unveil(dbname, "wc") == -1)
71 err(1, "unveil %s", dbname);
72 if (pledge("stdio rpath wpath cpath flock", NULL) == -1)
73 err(1, "pledge");
74
75 while ((ch = getopt(argc, argv, "")) != -1)
76 switch(ch) {
77 default:
78 usage();
79 }
80 argc -= optind;
81 argv += optind;
82
83 if (argc > 0)
84 usage();
85
86 if (chdir(_PATH_DEV))
87 err(1, "%s", _PATH_DEV);
88
89 fts = fts_open(paths, FTS_PHYSICAL | FTS_NOCHDIR, NULL);
90 if (!fts)
91 err(1, "fts_open");
92
93
94 bzero(&info, sizeof(info));
95 info.bsize = 8192;
96 db = dbopen(dbtmp, O_CREAT|O_EXLOCK|O_RDWR|O_TRUNC,
97 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, DB_HASH, &info);
98 if (db == NULL)
99 err(1, "%s", dbtmp);
100
101 /*
102 * Keys are a mode_t followed by a dev_t. The former is the type of
103 * the file (mode & S_IFMT), the latter is the st_rdev field. Note
104 * that the structure may contain padding, so we have to clear it
105 * out here.
106 */
107 bzero(&bkey, sizeof(bkey));
108 key.data = &bkey;
109 key.size = sizeof(bkey);
110 while ((dp = fts_read(fts))) {
111 if (dp->fts_info != FTS_DEFAULT)
112 continue;
113
114 /* Create the key. */
115 if (S_ISCHR(dp->fts_statp->st_mode)) {
116 if (strcmp(dp->fts_path, "./rrootdisk") == 0)
117 continue;
118 bkey.type = S_IFCHR;
119 } else if (S_ISBLK(dp->fts_statp->st_mode)) {
120 if (strcmp(dp->fts_path, "./rootdisk") == 0)
121 continue;
122 bkey.type = S_IFBLK;
123 } else
124 continue;
125 bkey.dev = dp->fts_statp->st_rdev;
126
127 /*
128 * Create the data; nul terminate the name so caller doesn't
129 * have to. strlen("./") is 2, which is stripped to remove the
130 * traversal root name.
131 */
132 data.data = dp->fts_path + 2;
133 data.size = dp->fts_pathlen - 2 + 1;
134 if ((db->put)(db, &key, &data, 0))
135 err(1, "dbput %s", dbtmp);
136 }
137 fts_close(fts);
138
139 (void)(db->close)(db);
140 if (rename(dbtmp, dbname))
141 err(1, "rename %s to %s", dbtmp, dbname);
142
143 return (0);
144}
145
146void
147usage(void)
148{
149
150 (void)fprintf(stderr, "usage: dev_mkdb\n");
151 exit(1);
152}