int main(int argc, char *argv[]) {
int o, rc;
MDBX_env *env;
MDBX_txn *txn;
MDBX_dbi dbi;
MDBX_stat mst;
MDBX_envinfo mei;
char *prog = argv[0];
char *envname;
char *subname = NULL;
int alldbs = 0, envinfo = 0, envflags = 0, freinfo = 0, rdrinfo = 0;
if (argc < 2) {
usage(prog);
}
/* -a: print stat of main DB and all subDBs
* -s: print stat of only the named subDB
* -e: print env info
* -f: print freelist info
* -r: print reader info
* -n: use NOSUBDIR flag on env_open
* -V: print version and exit
* (default) print stat of only the main DB
*/
while ((o = getopt(argc, argv, "Vaefnrs:")) != EOF) {
switch (o) {
case 'V':
printf("%s (%s, build %s)\n", mdbx_version.git.describe,
mdbx_version.git.datetime, mdbx_build.datetime);
exit(EXIT_SUCCESS);
break;
case 'a':
if (subname)
usage(prog);
alldbs++;
break;
case 'e':
envinfo++;
break;
case 'f':
freinfo++;
break;
case 'n':
envflags |= MDBX_NOSUBDIR;
break;
case 'r':
rdrinfo++;
break;
case 's':
if (alldbs)
usage(prog);
subname = optarg;
break;
default:
usage(prog);
}
}
if (optind != argc - 1)
usage(prog);
#if defined(_WIN32) || defined(_WIN64)
SetConsoleCtrlHandler(ConsoleBreakHandlerRoutine, true);
#else
#ifdef SIGPIPE
signal(SIGPIPE, signal_handler);
#endif
#ifdef SIGHUP
signal(SIGHUP, signal_handler);
#endif
signal(SIGINT, signal_handler);
signal(SIGTERM, signal_handler);
#endif /* !WINDOWS */
envname = argv[optind];
rc = mdbx_env_create(&env);
if (rc) {
fprintf(stderr, "mdbx_env_create failed, error %d %s\n", rc,
mdbx_strerror(rc));
return EXIT_FAILURE;
}
if (alldbs || subname) {
mdbx_env_set_maxdbs(env, 4);
}
rc = mdbx_env_open(env, envname, envflags | MDBX_RDONLY, 0664);
if (rc) {
fprintf(stderr, "mdbx_env_open failed, error %d %s\n", rc,
mdbx_strerror(rc));
goto env_close;
}
if (envinfo || freinfo) {
(void)mdbx_env_info(env, &mei, sizeof(mei));
} else {
/* LY: zap warnings from gcc */
memset(&mei, 0, sizeof(mei));
}
if (envinfo) {
(void)mdbx_env_stat(env, &mst, sizeof(mst));
printf("Environment Info\n");
printf(" Pagesize: %u\n", mst.ms_psize);
if (mei.mi_geo.lower != mei.mi_geo.upper) {
printf(" Dynamic datafile: %" PRIu64 "..%" PRIu64 " bytes (+%" PRIu64
"/-%" PRIu64 "), %" PRIu64 "..%" PRIu64 " pages (+%" PRIu64
"/-%" PRIu64 ")\n",
mei.mi_geo.lower, mei.mi_geo.upper, mei.mi_geo.grow,
mei.mi_geo.shrink, mei.mi_geo.lower / mst.ms_psize,
mei.mi_geo.upper / mst.ms_psize, mei.mi_geo.grow / mst.ms_psize,
mei.mi_geo.shrink / mst.ms_psize);
printf(" Current datafile: %" PRIu64 " bytes, %" PRIu64 " pages\n",
mei.mi_geo.current, mei.mi_geo.current / mst.ms_psize);
} else {
printf(" Fixed datafile: %" PRIu64 " bytes, %" PRIu64 " pages\n",
mei.mi_geo.current, mei.mi_geo.current / mst.ms_psize);
}
printf(" Current mapsize: %" PRIu64 " bytes, %" PRIu64 " pages \n",
mei.mi_mapsize, mei.mi_mapsize / mst.ms_psize);
printf(" Number of pages used: %" PRIu64 "\n", mei.mi_last_pgno + 1);
printf(" Last transaction ID: %" PRIu64 "\n", mei.mi_recent_txnid);
printf(" Tail transaction ID: %" PRIu64 " (%" PRIi64 ")\n",
mei.mi_latter_reader_txnid,
mei.mi_latter_reader_txnid - mei.mi_recent_txnid);
printf(" Max readers: %u\n", mei.mi_maxreaders);
printf(" Number of readers used: %u\n", mei.mi_numreaders);
} else {
/* LY: zap warnings from gcc */
memset(&mst, 0, sizeof(mst));
}
if (rdrinfo) {
printf("Reader Table Status\n");
rc = mdbx_reader_list(env, (MDBX_msg_func *)fputs, stdout);
if (rdrinfo > 1) {
int dead;
mdbx_reader_check(env, &dead);
printf(" %d stale readers cleared.\n", dead);
rc = mdbx_reader_list(env, (MDBX_msg_func *)fputs, stdout);
}
if (!(subname || alldbs || freinfo))
goto env_close;
}
rc = mdbx_txn_begin(env, NULL, MDBX_RDONLY, &txn);
if (rc) {
fprintf(stderr, "mdbx_txn_begin failed, error %d %s\n", rc,
mdbx_strerror(rc));
goto env_close;
}
if (freinfo) {
MDBX_cursor *cursor;
MDBX_val key, data;
pgno_t pages = 0, *iptr;
pgno_t reclaimable = 0;
printf("Freelist Status\n");
dbi = 0;
rc = mdbx_cursor_open(txn, dbi, &cursor);
if (rc) {
fprintf(stderr, "mdbx_cursor_open failed, error %d %s\n", rc,
mdbx_strerror(rc));
goto txn_abort;
}
rc = mdbx_dbi_stat(txn, dbi, &mst, sizeof(mst));
if (rc) {
fprintf(stderr, "mdbx_dbi_stat failed, error %d %s\n", rc,
mdbx_strerror(rc));
goto txn_abort;
}
prstat(&mst);
while ((rc = mdbx_cursor_get(cursor, &key, &data, MDBX_NEXT)) ==
MDBX_SUCCESS) {
if (user_break) {
rc = MDBX_EINTR;
break;
}
iptr = data.iov_base;
const pgno_t number = *iptr++;
pages += number;
if (envinfo && mei.mi_latter_reader_txnid > *(size_t *)key.iov_base)
reclaimable += number;
if (freinfo > 1) {
char *bad = "";
pgno_t prev =
MDBX_PNL_ASCENDING ? NUM_METAS - 1 : (pgno_t)mei.mi_last_pgno + 1;
pgno_t span = 1;
for (unsigned i = 0; i < number; ++i) {
pgno_t pg = iptr[i];
if (MDBX_PNL_DISORDERED(prev, pg))
bad = " [bad sequence]";
prev = pg;
while (i + span < number &&
iptr[i + span] == (MDBX_PNL_ASCENDING ? pgno_add(pg, span)
: pgno_sub(pg, span)))
++span;
}
printf(" Transaction %" PRIaTXN ", %" PRIaPGNO
" pages, maxspan %" PRIaPGNO "%s\n",
*(txnid_t *)key.iov_base, number, span, bad);
if (freinfo > 2) {
for (unsigned i = 0; i < number; i += span) {
const pgno_t pg = iptr[i];
for (span = 1;
i + span < number &&
iptr[i + span] == (MDBX_PNL_ASCENDING ? pgno_add(pg, span)
: pgno_sub(pg, span));
++span)
;
if (span > 1)
printf(" %9" PRIaPGNO "[%" PRIaPGNO "]\n", pg, span);
else
printf(" %9" PRIaPGNO "\n", pg);
}
}
}
}
mdbx_cursor_close(cursor);
switch (rc) {
case MDBX_SUCCESS:
case MDBX_NOTFOUND:
break;
case MDBX_EINTR:
fprintf(stderr, "Interrupted by signal/user\n");
goto txn_abort;
default:
fprintf(stderr, "mdbx_cursor_get failed, error %d %s\n", rc,
mdbx_strerror(rc));
goto txn_abort;
}
if (envinfo) {
uint64_t value = mei.mi_mapsize / mst.ms_psize;
double percent = value / 100.0;
printf("Page Allocation Info\n");
printf(" Max pages: %" PRIu64 " 100%%\n", value);
value = mei.mi_last_pgno + 1;
printf(" Pages used: %" PRIu64 " %.1f%%\n", value, value / percent);
value = mei.mi_mapsize / mst.ms_psize - (mei.mi_last_pgno + 1);
printf(" Remained: %" PRIu64 " %.1f%%\n", value, value / percent);
value = mei.mi_last_pgno + 1 - pages;
printf(" Used now: %" PRIu64 " %.1f%%\n", value, value / percent);
value = pages;
printf(" Unallocated: %" PRIu64 " %.1f%%\n", value, value / percent);
value = pages - reclaimable;
printf(" Detained: %" PRIu64 " %.1f%%\n", value, value / percent);
value = reclaimable;
printf(" Reclaimable: %" PRIu64 " %.1f%%\n", value, value / percent);
value =
mei.mi_mapsize / mst.ms_psize - (mei.mi_last_pgno + 1) + reclaimable;
printf(" Available: %" PRIu64 " %.1f%%\n", value, value / percent);
} else
printf(" Free pages: %" PRIaPGNO "\n", pages);
}
rc = mdbx_dbi_open(txn, subname, 0, &dbi);
if (rc) {
fprintf(stderr, "mdbx_open failed, error %d %s\n", rc, mdbx_strerror(rc));
goto txn_abort;
}
rc = mdbx_dbi_stat(txn, dbi, &mst, sizeof(mst));
if (rc) {
fprintf(stderr, "mdbx_dbi_stat failed, error %d %s\n", rc,
mdbx_strerror(rc));
goto txn_abort;
}
printf("Status of %s\n", subname ? subname : "Main DB");
prstat(&mst);
if (alldbs) {
MDBX_cursor *cursor;
MDBX_val key;
rc = mdbx_cursor_open(txn, dbi, &cursor);
if (rc) {
fprintf(stderr, "mdbx_cursor_open failed, error %d %s\n", rc,
mdbx_strerror(rc));
goto txn_abort;
}
while ((rc = mdbx_cursor_get(cursor, &key, NULL, MDBX_NEXT_NODUP)) == 0) {
char *str;
MDBX_dbi db2;
if (memchr(key.iov_base, '\0', key.iov_len))
continue;
str = mdbx_malloc(key.iov_len + 1);
memcpy(str, key.iov_base, key.iov_len);
str[key.iov_len] = '\0';
rc = mdbx_dbi_open(txn, str, 0, &db2);
if (rc == MDBX_SUCCESS)
printf("Status of %s\n", str);
mdbx_free(str);
if (rc)
continue;
rc = mdbx_dbi_stat(txn, db2, &mst, sizeof(mst));
if (rc) {
fprintf(stderr, "mdbx_dbi_stat failed, error %d %s\n", rc,
mdbx_strerror(rc));
goto txn_abort;
}
prstat(&mst);
mdbx_dbi_close(env, db2);
}
mdbx_cursor_close(cursor);
}
if (rc == MDBX_NOTFOUND)
rc = MDBX_SUCCESS;
mdbx_dbi_close(env, dbi);
txn_abort:
mdbx_txn_abort(txn);
env_close:
mdbx_env_close(env);
return rc ? EXIT_FAILURE : EXIT_SUCCESS;
}
int main(int argc, char *argv[]) {
(void)argc;
(void)argv;
int rc;
MDBX_env *env = NULL;
MDBX_dbi dbi = 0;
MDBX_val key, data;
MDBX_txn *txn = NULL;
MDBX_cursor *cursor = NULL;
char sval[32];
rc = mdbx_env_create(&env);
if (rc != MDBX_SUCCESS) {
fprintf(stderr, "mdbx_env_create: (%d) %s\n", rc, mdbx_strerror(rc));
goto bailout;
}
rc = mdbx_env_open(env, "./example-db",
MDBX_NOSUBDIR | MDBX_COALESCE | MDBX_LIFORECLAIM, 0664);
if (rc != MDBX_SUCCESS) {
fprintf(stderr, "mdbx_env_open: (%d) %s\n", rc, mdbx_strerror(rc));
goto bailout;
}
rc = mdbx_txn_begin(env, NULL, 0, &txn);
if (rc != MDBX_SUCCESS) {
fprintf(stderr, "mdbx_txn_begin: (%d) %s\n", rc, mdbx_strerror(rc));
goto bailout;
}
rc = mdbx_dbi_open(txn, NULL, 0, &dbi);
if (rc != MDBX_SUCCESS) {
fprintf(stderr, "mdbx_dbi_open: (%d) %s\n", rc, mdbx_strerror(rc));
goto bailout;
}
key.iov_len = sizeof(int);
key.iov_base = sval;
data.iov_len = sizeof(sval);
data.iov_base = sval;
sprintf(sval, "%03x %d foo bar", 32, 3141592);
rc = mdbx_put(txn, dbi, &key, &data, 0);
if (rc != MDBX_SUCCESS) {
fprintf(stderr, "mdbx_put: (%d) %s\n", rc, mdbx_strerror(rc));
goto bailout;
}
rc = mdbx_txn_commit(txn);
if (rc) {
fprintf(stderr, "mdbx_txn_commit: (%d) %s\n", rc, mdbx_strerror(rc));
goto bailout;
}
txn = NULL;
rc = mdbx_txn_begin(env, NULL, MDBX_RDONLY, &txn);
if (rc != MDBX_SUCCESS) {
fprintf(stderr, "mdbx_txn_begin: (%d) %s\n", rc, mdbx_strerror(rc));
goto bailout;
}
rc = mdbx_cursor_open(txn, dbi, &cursor);
if (rc != MDBX_SUCCESS) {
fprintf(stderr, "mdbx_cursor_open: (%d) %s\n", rc, mdbx_strerror(rc));
goto bailout;
}
int found = 0;
while ((rc = mdbx_cursor_get(cursor, &key, &data, MDBX_NEXT)) == 0) {
printf("key: %p %.*s, data: %p %.*s\n", key.iov_base, (int)key.iov_len,
(char *)key.iov_base, data.iov_base, (int)data.iov_len,
(char *)data.iov_base);
found += 1;
}
if (rc != MDBX_NOTFOUND || found == 0) {
fprintf(stderr, "mdbx_cursor_get: (%d) %s\n", rc, mdbx_strerror(rc));
goto bailout;
} else {
rc = MDBX_SUCCESS;
}
bailout:
if (cursor)
mdbx_cursor_close(cursor);
if (txn)
mdbx_txn_abort(txn);
if (dbi)
mdbx_dbi_close(env, dbi);
if (env)
mdbx_env_close(env);
return (rc != MDBX_SUCCESS) ? EXIT_FAILURE : EXIT_SUCCESS;
}