mirror of
https://github.com/MariaDB/server.git
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103 lines
2.6 KiB
C++
103 lines
2.6 KiB
C++
/* -*- mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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// vim: expandtab:ts=8:sw=4:softtabstop=4:
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/* Just like db_dump.cpp except use exceptions. */
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#include <stdlib.h>
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#include <assert.h>
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#include <db_cxx.h>
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#include <memory.h>
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static void hexdump(Dbt *d) {
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unsigned char *cp = (unsigned char *) d->get_data();
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int n = d->get_size();
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printf(" ");
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for (int i=0; i<n; i++)
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printf("%2.2x", cp[i]);
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printf("\n");
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}
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static int dbdump(const char *env_dir, const char *dbfile, const char *dbname) {
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int r;
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#if defined(USE_ENV) && USE_ENV
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DbEnv env(0);
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r = env.set_redzone(0); assert(r==0);
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r = env.open(env_dir, DB_INIT_MPOOL + DB_CREATE + DB_PRIVATE, 0777); assert(r == 0);
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Db db(&env, 0);
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#else
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Db db(0, 0);
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#endif
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try {
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r = db.open(0, dbfile, dbname, DB_BTREE, 0, 0777);
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assert(r==0);
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} catch (DbException e) {
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printf("Cannot open %s:%s due to error %d\n", dbfile, dbname, e.get_errno());
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#if defined(USE_ENV) && USE_ENV
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r = env.close(0); assert(r == 0);
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#endif
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return 1;
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}
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Dbc *cursor;
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r = db.cursor(0, &cursor, 0); assert(r == 0);
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Dbt key; key.set_flags(DB_DBT_REALLOC);
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Dbt val; val.set_flags(DB_DBT_REALLOC);
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try {
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for (;;) {
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r = cursor->get(&key, &val, DB_NEXT);
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if (r == DB_NOTFOUND) break;
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assert(r==0);
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// printf("%.*s\n", key.get_size(), (char *)key.get_data());
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hexdump(&key);
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// printf("%.*s\n", val.get_size(), (char *)val.get_data());
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hexdump(&val);
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}
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} catch (DbException ) {
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/* Nothing, that's just how we got out of the loop. */
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}
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toku_free(key.get_data());
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toku_free(val.get_data());
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r = cursor->close(); assert(r == 0);
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r = db.close(0); assert(r == 0);
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#if defined(USE_ENV) && USE_ENV
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r = env.close(0); assert(r == 0);
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#endif
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return 0;
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}
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static int usage() {
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printf("db_dump [-s DBNAME] DBFILE\n");
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return 1;
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}
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int main(int argc, char *argv[]) {
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int i;
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const char *env_dir = ".";
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const char *dbname = 0;
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for (i=1; i<argc; i++) {
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const char *arg = argv[i];
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if (0 == strcmp(arg, "-h") || 0 == strcmp(arg, "--help"))
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return usage();
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if (0 == strcmp(arg, "-s")) {
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i++;
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if (i >= argc)
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return usage();
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dbname = argv[i];
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continue;
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}
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if (0 == strcmp(arg, "--env_dir")) {
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if (i+1 >= argc)
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return usage();
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env_dir = argv[++i];
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continue;
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}
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break;
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}
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if (i >= argc)
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return usage();
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return dbdump(env_dir, argv[i], dbname);
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}
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