1 /* $NetBSD: kvm_mkdb.c,v 1.21 2018/01/23 21:06:25 sevan 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 /*-
33  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
34  *
35  * Redistribution and use in source and binary forms, with or without
36  * modification, are permitted provided that the following conditions
37  * are met:
38  * 1. Redistributions of source code must retain the above copyright
39  *    notice, this list of conditions and the following disclaimer.
40  * 2. Redistributions in binary form must reproduce the above copyright
41  *    notice, this list of conditions and the following disclaimer in the
42  *    documentation and/or other materials provided with the distribution.
43  * 3. All advertising materials mentioning features or use of this software
44  *    must display the following acknowledgement:
45  *        This product includes software developed by the University of
46  *        California, Berkeley and its contributors.
47  * 4. Neither the name of the University nor the names of its contributors
48  *    may be used to endorse or promote products derived from this software
49  *    without specific prior written permission.
50  *
51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61  * SUCH DAMAGE.
62  */
63 
64 #include <sys/cdefs.h>
65 #ifndef lint
66 __COPYRIGHT("@(#) Copyright (c) 1990, 1993\
67  The Regents of the University of California.  All rights reserved.");
68 #endif /* not lint */
69 
70 #ifndef lint
71 #if 0
72 static char sccsid[] = "from: @(#)kvm_mkdb.c      8.3 (Berkeley) 5/4/95";
73 #else
74 __RCSID("$NetBSD: kvm_mkdb.c,v 1.21 2018/01/23 21:06:25 sevan Exp $");
75 #endif
76 #endif /* not lint */
77 
78 #include <sys/param.h>
79 #include <sys/stat.h>
80 
81 #include <db.h>
82 #include <err.h>
83 #include <errno.h>
84 #include <fcntl.h>
85 #include <paths.h>
86 #include <stdio.h>
87 #include <stdlib.h>
88 #include <string.h>
89 #include <unistd.h>
90 
91 #include "extern.h"
92 
93 static    void      usage(void) __dead;
94 
95 HASHINFO openinfo = {
96           4096,               /* bsize */
97           128,                /* ffactor */
98           1024,               /* nelem */
99           2048 * 1024,        /* cachesize */
100           NULL,               /* hash() */
101           0                   /* lorder */
102 };
103 
104 static DB *db;
105 static char *dbname = NULL;
106 static char dbtemp[MAXPATHLEN];
107 
108 int
main(int argc,char * argv[])109 main(int argc, char *argv[])
110 {
111           int ch;
112           char *nlistpath;
113           int docheck = 0;
114           int fd;
115 
116           while ((ch = getopt(argc, argv, "o:")) != -1)
117                     switch (ch) {
118                     case 'o':
119                               dbname = optarg;
120                               break;
121 
122                     case '?':
123                     default:
124                               usage();
125                     }
126           argc -= optind;
127           argv += optind;
128 
129           if (argc > 1)
130                     usage();
131 
132           if (dbname == NULL) {
133                     dbname = _PATH_KVMDB;
134                     docheck = 1;
135           } else    if (strncmp(_PATH_KVMDB, dbname, sizeof(_PATH_KVMDB)) == 0) {
136                     docheck = 1;
137           }
138           if (docheck) {
139                     /*
140                      * If the existing db file matches the currently running
141                      * kernel, exit
142                      */
143                     if (testdb())
144                               exit(0);
145           }
146 
147           if (argc <= 0) {
148                     /*
149                      * Check for useability of _PATH_KSYMS, if not
150                      * then fallback to _PATH_UNIX.
151                      * Should we complain if failure?
152                      */
153                     if ((fd = open(_PATH_KSYMS, O_RDONLY)) >= 0) {
154                               close(fd);
155                               nlistpath = _PATH_KSYMS;
156                     } else
157                               nlistpath = _PATH_UNIX;
158           } else
159                     nlistpath = argv[0];
160 
161           (void)snprintf(dbtemp, sizeof(dbtemp), "%s.tmp", dbname);
162           (void)umask(0);
163           db = dbopen(dbtemp, O_CREAT | O_EXLOCK | O_TRUNC | O_RDWR,
164               S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH, DB_HASH, &openinfo);
165           if (db == NULL)
166                     err(1, "%s", dbtemp);
167           create_knlist(nlistpath, db);
168           if (db->close(db)) {
169                     warn("%s", dbtemp);
170                     db = NULL;
171                     punt();
172           }
173           db = NULL;
174           if (rename(dbtemp, dbname)) {
175                     warn("rename %s to %s", dbtemp, dbname);
176                     punt();
177           }
178           exit(0);
179 }
180 
181 static void
usage(void)182 usage(void)
183 {
184           (void)fprintf(stderr, "usage: kvm_mkdb [-o database] [file]\n");
185           exit(1);
186 }
187 
188 void
punt()189 punt()
190 {
191 
192           if (db != NULL)
193                     db->close(db);
194           unlink(dbtemp);
195           exit(1);
196 }
197