forked from lthn/blockchain
28659827c3
lmdb v 24 requires manual resizing/growing during it's normal function Zano core is purely async so it's not easy to prevent all DB txs from starting on lmdb adapter level, because it will lead to random deadlocks in the core due to many high-level cross-thread dependencies. We will rethink this later. Many thanks to @leo-yuriev who helped us to discover these issues!
84 lines
2 KiB
C
84 lines
2 KiB
C
/* mdb_copy.c - memory-mapped database backup tool */
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/*
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* Copyright 2012-2015 Howard Chu, Symas Corp.
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* 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 only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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#ifdef _WIN32
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#include <windows.h>
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#define MDB_STDOUT GetStdHandle(STD_OUTPUT_HANDLE)
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#else
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#define MDB_STDOUT 1
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include "lmdb.h"
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static void
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sighandle(int sig)
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{
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}
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int main(int argc,char * argv[])
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{
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int rc;
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MDB_env *env;
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const char *progname = argv[0], *act;
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unsigned flags = MDB_RDONLY;
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unsigned cpflags = 0;
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for (; argc > 1 && argv[1][0] == '-'; argc--, argv++) {
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if (argv[1][1] == 'n' && argv[1][2] == '\0')
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flags |= MDB_NOSUBDIR;
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else if (argv[1][1] == 'v' && argv[1][2] == '\0')
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flags |= MDB_PREVSNAPSHOT;
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else if (argv[1][1] == 'c' && argv[1][2] == '\0')
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cpflags |= MDB_CP_COMPACT;
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else if (argv[1][1] == 'V' && argv[1][2] == '\0') {
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printf("%s\n", MDB_VERSION_STRING);
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exit(0);
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} else
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argc = 0;
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}
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if (argc<2 || argc>3) {
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fprintf(stderr, "usage: %s [-V] [-c] [-n] [-v] srcpath [dstpath]\n", progname);
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exit(EXIT_FAILURE);
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}
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#ifdef SIGPIPE
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signal(SIGPIPE, sighandle);
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#endif
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#ifdef SIGHUP
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signal(SIGHUP, sighandle);
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#endif
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signal(SIGINT, sighandle);
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signal(SIGTERM, sighandle);
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act = "opening environment";
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rc = mdb_env_create(&env);
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if (rc == MDB_SUCCESS) {
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rc = mdb_env_open(env, argv[1], flags, 0600);
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}
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if (rc == MDB_SUCCESS) {
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act = "copying";
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if (argc == 2)
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rc = mdb_env_copyfd2(env, MDB_STDOUT, cpflags);
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else
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rc = mdb_env_copy2(env, argv[2], cpflags);
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}
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if (rc)
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fprintf(stderr, "%s: %s failed, error %d (%s)\n",
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progname, act, rc, mdb_strerror(rc));
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mdb_env_close(env);
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return rc ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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