int main(int argc,char * argv[])
{
int rc;
MDB_env *env;
const char *progname = argv[0], *act;
unsigned flags = MDB_RDONLY;
unsigned cpflags = 0;
for (; argc > 1 && argv[1][0] == '-'; argc--, argv++) {
if (argv[1][1] == 'n' && argv[1][2] == '\0')
flags |= MDB_NOSUBDIR;
else if (argv[1][1] == 'c' && argv[1][2] == '\0')
cpflags |= MDB_CP_COMPACT;
else if (argv[1][1] == 'V' && argv[1][2] == '\0') {
printf("%s\n", MDB_VERSION_STRING);
exit(0);
} else
argc = 0;
}
if (argc<2 || argc>3) {
fprintf(stderr, "usage: %s [-V] [-c] [-n] srcpath [dstpath]\n", progname);
exit(EXIT_FAILURE);
}
#ifdef SIGPIPE
signal(SIGPIPE, sighandle);
#endif
#ifdef SIGHUP
signal(SIGHUP, sighandle);
#endif
signal(SIGINT, sighandle);
signal(SIGTERM, sighandle);
act = "opening environment";
rc = mdb_env_create(&env);
if (rc == MDB_SUCCESS) {
rc = mdb_env_open(env, argv[1], flags, 0600);
}
if (rc == MDB_SUCCESS) {
act = "copying";
if (argc == 2)
rc = mdb_env_copyfd2(env, MDB_STDOUT, cpflags);
else
rc = mdb_env_copy2(env, argv[2], cpflags);
}
if (rc)
fprintf(stderr, "%s: %s failed, error %d (%s)\n",
progname, act, rc, mdb_strerror(rc));
mdb_env_close(env);
return rc ? EXIT_FAILURE : EXIT_SUCCESS;
}
int db_snapshot_to_fd(db_t db, int fd, int compact){
int r;
pthread_mutex_lock(&db->mutex);
db->txns++;
pthread_mutex_unlock(&db->mutex);
r = mdb_env_copyfd2(db->env, fd, compact ? MDB_CP_COMPACT : 0);
while(MDB_MAP_RESIZED == r){
pthread_mutex_lock(&db->mutex);
while(db->txns > 1)
pthread_cond_wait(&db->cond, &db->mutex);
mdb_env_set_mapsize(db->env, 0);
pthread_mutex_unlock(&db->mutex);
r = mdb_env_copyfd2(db->env, fd, compact ? MDB_CP_COMPACT : 0);
}
pthread_mutex_lock(&db->mutex);
if(1 == db->txns--)
pthread_cond_signal(&db->cond);
pthread_mutex_unlock(&db->mutex);
return r;
}
