1 /* mdb_dump.c - memory-mapped database dump tool */
3 * Copyright 2011-2016 Howard Chu, Symas Corp.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted only as authorized by the OpenLDAP
10 * A copy of this license is available in the file LICENSE in the
11 * top-level directory of the distribution or, alternatively, at
12 * <http://www.OpenLDAP.org/license.html>.
41 typedef struct flagbit {
47 { MDB_REVERSEKEY, "reversekey" },
48 { MDB_DUPSORT, "dupsort" },
49 { MDB_INTEGERKEY, "integerkey" },
50 { MDB_DUPFIXED, "dupfixed" },
51 { MDB_INTEGERDUP, "integerdup" },
52 { MDB_REVERSEDUP, "reversedup" },
56 static volatile sig_atomic_t gotsig;
58 static void dumpsig( int sig )
63 static const char hexc[] = "0123456789abcdef";
65 static void hex(unsigned char c)
67 putchar(hexc[c >> 4]);
68 putchar(hexc[c & 0xf]);
71 static void text(MDB_val *v)
73 unsigned char *c, *end;
90 static void byte(MDB_val *v)
92 unsigned char *c, *end;
103 /* Dump in BDB-compatible format */
104 static int dumpit(MDB_txn *txn, MDB_dbi dbi, char *name)
113 rc = mdb_dbi_flags(txn, dbi, &flags);
116 rc = mdb_stat(txn, dbi, &ms);
119 rc = mdb_env_info(mdb_txn_env(txn), &info);
122 printf("VERSION=3\n");
123 printf("format=%s\n", mode & PRINT ? "print" : "bytevalue");
125 printf("database=%s\n", name);
126 printf("type=btree\n");
127 printf("mapsize=%" Y "u\n", info.me_mapsize);
129 printf("mapaddr=%p\n", info.me_mapaddr);
130 printf("maxreaders=%u\n", info.me_maxreaders);
132 if (flags & MDB_DUPSORT)
133 printf("duplicates=1\n");
135 for (i=0; dbflags[i].bit; i++)
136 if (flags & dbflags[i].bit)
137 printf("%s=1\n", dbflags[i].name);
139 printf("db_pagesize=%d\n", ms.ms_psize);
140 printf("HEADER=END\n");
142 rc = mdb_cursor_open(txn, dbi, &mc);
145 while ((rc = mdb_cursor_get(mc, &key, &data, MDB_NEXT) == MDB_SUCCESS)) {
158 printf("DATA=END\n");
159 if (rc == MDB_NOTFOUND)
165 static void usage(char *prog)
167 fprintf(stderr, "usage: %s [-V] [-f output] [-l] [-n] [-p] [-a|-s subdb] dbpath\n", prog);
171 int main(int argc, char *argv[])
177 char *prog = argv[0];
179 char *subname = NULL;
180 int alldbs = 0, envflags = 0, list = 0;
186 /* -a: dump main DB and all subDBs
187 * -s: dump only the named subDB
188 * -n: use NOSUBDIR flag on env_open
189 * -p: use printable characters
190 * -f: write to file instead of stdout
191 * -V: print version and exit
192 * (default) dump only the main DB
194 while ((i = getopt(argc, argv, "af:lnps:V")) != EOF) {
197 printf("%s\n", MDB_VERSION_STRING);
209 if (freopen(optarg, "w", stdout) == NULL) {
210 fprintf(stderr, "%s: %s: reopen: %s\n",
211 prog, optarg, strerror(errno));
216 envflags |= MDB_NOSUBDIR;
231 if (optind != argc - 1)
235 signal(SIGPIPE, dumpsig);
238 signal(SIGHUP, dumpsig);
240 signal(SIGINT, dumpsig);
241 signal(SIGTERM, dumpsig);
243 envname = argv[optind];
244 rc = mdb_env_create(&env);
246 fprintf(stderr, "mdb_env_create failed, error %d %s\n", rc, mdb_strerror(rc));
250 if (alldbs || subname) {
251 mdb_env_set_maxdbs(env, 2);
254 rc = mdb_env_open(env, envname, envflags | MDB_RDONLY, 0664);
256 fprintf(stderr, "mdb_env_open failed, error %d %s\n", rc, mdb_strerror(rc));
260 rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn);
262 fprintf(stderr, "mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc));
266 rc = mdb_open(txn, subname, 0, &dbi);
268 fprintf(stderr, "mdb_open failed, error %d %s\n", rc, mdb_strerror(rc));
277 rc = mdb_cursor_open(txn, dbi, &cursor);
279 fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc));
282 while ((rc = mdb_cursor_get(cursor, &key, NULL, MDB_NEXT_NODUP)) == 0) {
285 if (memchr(key.mv_data, '\0', key.mv_size))
288 str = malloc(key.mv_size+1);
289 memcpy(str, key.mv_data, key.mv_size);
290 str[key.mv_size] = '\0';
291 rc = mdb_open(txn, str, 0, &db2);
292 if (rc == MDB_SUCCESS) {
297 rc = dumpit(txn, db2, str);
306 mdb_cursor_close(cursor);
308 fprintf(stderr, "%s: %s does not contain multiple databases\n", prog, envname);
310 } else if (rc == MDB_NOTFOUND) {
314 rc = dumpit(txn, dbi, subname);
316 if (rc && rc != MDB_NOTFOUND)
317 fprintf(stderr, "%s: %s: %s\n", prog, envname, mdb_strerror(rc));
325 return rc ? EXIT_FAILURE : EXIT_SUCCESS;