Line data Source code
1 : /*
2 : * pg_controldata
3 : *
4 : * reads the data from the control file located at $PGDATA/XLOG_CONTROL_FILE.
5 : *
6 : * copyright (c) Oliver Elphick <olly@lfix.co.uk>, 2001;
7 : * license: BSD
8 : *
9 : * src/bin/pg_controldata/pg_controldata.c
10 : */
11 :
12 : /*
13 : * We have to use postgres.h not postgres_fe.h here, because there's so much
14 : * backend-only stuff in the XLOG include files we need. But we need a
15 : * frontend-ish environment otherwise. Hence this ugly hack.
16 : */
17 : #define FRONTEND 1
18 :
19 : #include "postgres.h"
20 :
21 : #include <time.h>
22 :
23 : #include "access/transam.h"
24 : #include "access/xlog.h"
25 : #include "access/xlog_internal.h"
26 : #include "catalog/pg_control.h"
27 : #include "common/controldata_utils.h"
28 : #include "common/logging.h"
29 : #include "getopt_long.h"
30 : #include "pg_getopt.h"
31 :
32 : static void
33 0 : usage(const char *progname)
34 : {
35 0 : printf(_("%s displays control information of a PostgreSQL database cluster.\n\n"), progname);
36 0 : printf(_("Usage:\n"));
37 0 : printf(_(" %s [OPTION] [DATADIR]\n"), progname);
38 0 : printf(_("\nOptions:\n"));
39 0 : printf(_(" [-D, --pgdata=]DATADIR data directory\n"));
40 0 : printf(_(" -V, --version output version information, then exit\n"));
41 0 : printf(_(" -?, --help show this help, then exit\n"));
42 0 : printf(_("\nIf no data directory (DATADIR) is specified, "
43 : "the environment variable PGDATA\nis used.\n\n"));
44 0 : printf(_("Report bugs to <%s>.\n"), PACKAGE_BUGREPORT);
45 0 : printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
46 0 : }
47 :
48 :
49 : static const char *
50 0 : dbState(DBState state)
51 : {
52 0 : switch (state)
53 : {
54 : case DB_STARTUP:
55 0 : return _("starting up");
56 : case DB_SHUTDOWNED:
57 0 : return _("shut down");
58 : case DB_SHUTDOWNED_IN_RECOVERY:
59 0 : return _("shut down in recovery");
60 : case DB_SHUTDOWNING:
61 0 : return _("shutting down");
62 : case DB_IN_CRASH_RECOVERY:
63 0 : return _("in crash recovery");
64 : case DB_IN_ARCHIVE_RECOVERY:
65 0 : return _("in archive recovery");
66 : case DB_IN_PRODUCTION:
67 0 : return _("in production");
68 : }
69 0 : return _("unrecognized status code");
70 0 : }
71 :
72 : static const char *
73 0 : wal_level_str(WalLevel wal_level)
74 : {
75 0 : switch (wal_level)
76 : {
77 : case WAL_LEVEL_MINIMAL:
78 0 : return "minimal";
79 : case WAL_LEVEL_REPLICA:
80 0 : return "replica";
81 : case WAL_LEVEL_LOGICAL:
82 0 : return "logical";
83 : }
84 0 : return _("unrecognized \"wal_level\"");
85 0 : }
86 :
87 :
88 : int
89 0 : main(int argc, char *argv[])
90 : {
91 : static struct option long_options[] = {
92 : {"pgdata", required_argument, NULL, 'D'},
93 : {NULL, 0, NULL, 0}
94 : };
95 :
96 0 : ControlFileData *ControlFile;
97 0 : bool crc_ok;
98 0 : char *DataDir = NULL;
99 0 : time_t time_tmp;
100 0 : struct tm *tm_tmp;
101 0 : char pgctime_str[128];
102 0 : char ckpttime_str[128];
103 0 : char mock_auth_nonce_str[MOCK_AUTH_NONCE_LEN * 2 + 1];
104 0 : const char *strftime_fmt = "%c";
105 0 : const char *progname;
106 0 : char xlogfilename[MAXFNAMELEN];
107 0 : int c;
108 0 : int i;
109 0 : int WalSegSz;
110 :
111 0 : pg_logging_init(argv[0]);
112 0 : set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pg_controldata"));
113 0 : progname = get_progname(argv[0]);
114 :
115 0 : if (argc > 1)
116 : {
117 0 : if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
118 : {
119 0 : usage(progname);
120 0 : exit(0);
121 : }
122 0 : if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
123 : {
124 0 : puts("pg_controldata (PostgreSQL) " PG_VERSION);
125 0 : exit(0);
126 : }
127 0 : }
128 :
129 0 : while ((c = getopt_long(argc, argv, "D:", long_options, NULL)) != -1)
130 : {
131 0 : switch (c)
132 : {
133 : case 'D':
134 0 : DataDir = optarg;
135 0 : break;
136 :
137 : default:
138 : /* getopt_long already emitted a complaint */
139 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
140 0 : exit(1);
141 : }
142 : }
143 :
144 0 : if (DataDir == NULL)
145 : {
146 0 : if (optind < argc)
147 0 : DataDir = argv[optind++];
148 : else
149 0 : DataDir = getenv("PGDATA");
150 0 : }
151 :
152 : /* Complain if any arguments remain */
153 0 : if (optind < argc)
154 : {
155 0 : pg_log_error("too many command-line arguments (first is \"%s\")",
156 : argv[optind]);
157 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
158 0 : exit(1);
159 : }
160 :
161 0 : if (DataDir == NULL)
162 : {
163 0 : pg_log_error("no data directory specified");
164 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
165 0 : exit(1);
166 : }
167 :
168 : /* get a copy of the control file */
169 0 : ControlFile = get_controlfile(DataDir, &crc_ok);
170 0 : if (ControlFile->pg_control_version != PG_CONTROL_VERSION)
171 : {
172 0 : pg_log_warning("control file version (%u) does not match the version understood by this program (%u)",
173 : ControlFile->pg_control_version, PG_CONTROL_VERSION);
174 0 : pg_log_warning_detail("Either the control file has been created with a different version of PostgreSQL, "
175 : "or it is corrupt. The results below are untrustworthy.");
176 0 : }
177 0 : else if (!crc_ok)
178 : {
179 0 : pg_log_warning("calculated CRC checksum does not match value stored in control file");
180 0 : pg_log_warning_detail("Either the control file is corrupt, or it has a different layout than this program "
181 : "is expecting. The results below are untrustworthy.");
182 0 : }
183 :
184 : /* set wal segment size */
185 0 : WalSegSz = ControlFile->xlog_seg_size;
186 :
187 0 : if (!IsValidWalSegSize(WalSegSz))
188 : {
189 0 : pg_log_warning(ngettext("invalid WAL segment size in control file (%d byte)",
190 : "invalid WAL segment size in control file (%d bytes)",
191 : WalSegSz),
192 : WalSegSz);
193 0 : pg_log_warning_detail("The WAL segment size must be a power of two between 1 MB and 1 GB.");
194 0 : pg_log_warning_detail("The file is corrupt and the results below are untrustworthy.");
195 0 : }
196 :
197 : /*
198 : * This slightly-chintzy coding will work as long as the control file
199 : * timestamps are within the range of time_t; that should be the case in
200 : * all foreseeable circumstances, so we don't bother importing the
201 : * backend's timezone library into pg_controldata.
202 : *
203 : * Use variable for format to suppress overly-anal-retentive gcc warning
204 : * about %c
205 : */
206 0 : time_tmp = (time_t) ControlFile->time;
207 0 : tm_tmp = localtime(&time_tmp);
208 :
209 0 : if (tm_tmp != NULL)
210 0 : strftime(pgctime_str, sizeof(pgctime_str), strftime_fmt, tm_tmp);
211 : else
212 0 : snprintf(pgctime_str, sizeof(pgctime_str), _("???"));
213 :
214 0 : time_tmp = (time_t) ControlFile->checkPointCopy.time;
215 0 : tm_tmp = localtime(&time_tmp);
216 :
217 0 : if (tm_tmp != NULL)
218 0 : strftime(ckpttime_str, sizeof(ckpttime_str), strftime_fmt, tm_tmp);
219 : else
220 0 : snprintf(ckpttime_str, sizeof(ckpttime_str), _("???"));
221 :
222 : /*
223 : * Calculate name of the WAL file containing the latest checkpoint's REDO
224 : * start point.
225 : *
226 : * A corrupted control file could report a WAL segment size of 0 or
227 : * negative value, and to guard against division by zero, we need to treat
228 : * that specially.
229 : */
230 0 : if (WalSegSz > 0)
231 : {
232 0 : XLogSegNo segno;
233 :
234 0 : XLByteToSeg(ControlFile->checkPointCopy.redo, segno, WalSegSz);
235 0 : XLogFileName(xlogfilename, ControlFile->checkPointCopy.ThisTimeLineID,
236 0 : segno, WalSegSz);
237 0 : }
238 : else
239 0 : strcpy(xlogfilename, _("???"));
240 :
241 0 : for (i = 0; i < MOCK_AUTH_NONCE_LEN; i++)
242 0 : snprintf(&mock_auth_nonce_str[i * 2], 3, "%02x",
243 0 : (unsigned char) ControlFile->mock_authentication_nonce[i]);
244 :
245 0 : printf(_("pg_control version number: %u\n"),
246 : ControlFile->pg_control_version);
247 0 : printf(_("Catalog version number: %u\n"),
248 : ControlFile->catalog_version_no);
249 0 : printf(_("Database system identifier: %" PRIu64 "\n"),
250 : ControlFile->system_identifier);
251 0 : printf(_("Database cluster state: %s\n"),
252 : dbState(ControlFile->state));
253 0 : printf(_("pg_control last modified: %s\n"),
254 : pgctime_str);
255 0 : printf(_("Latest checkpoint location: %X/%08X\n"),
256 : LSN_FORMAT_ARGS(ControlFile->checkPoint));
257 0 : printf(_("Latest checkpoint's REDO location: %X/%08X\n"),
258 : LSN_FORMAT_ARGS(ControlFile->checkPointCopy.redo));
259 0 : printf(_("Latest checkpoint's REDO WAL file: %s\n"),
260 : xlogfilename);
261 0 : printf(_("Latest checkpoint's TimeLineID: %u\n"),
262 : ControlFile->checkPointCopy.ThisTimeLineID);
263 0 : printf(_("Latest checkpoint's PrevTimeLineID: %u\n"),
264 : ControlFile->checkPointCopy.PrevTimeLineID);
265 0 : printf(_("Latest checkpoint's full_page_writes: %s\n"),
266 : ControlFile->checkPointCopy.fullPageWrites ? _("on") : _("off"));
267 0 : printf(_("Latest checkpoint's NextXID: %u:%u\n"),
268 : EpochFromFullTransactionId(ControlFile->checkPointCopy.nextXid),
269 : XidFromFullTransactionId(ControlFile->checkPointCopy.nextXid));
270 0 : printf(_("Latest checkpoint's NextOID: %u\n"),
271 : ControlFile->checkPointCopy.nextOid);
272 0 : printf(_("Latest checkpoint's NextMultiXactId: %u\n"),
273 : ControlFile->checkPointCopy.nextMulti);
274 0 : printf(_("Latest checkpoint's NextMultiOffset: %" PRIu64 "\n"),
275 : ControlFile->checkPointCopy.nextMultiOffset);
276 0 : printf(_("Latest checkpoint's oldestXID: %u\n"),
277 : ControlFile->checkPointCopy.oldestXid);
278 0 : printf(_("Latest checkpoint's oldestXID's DB: %u\n"),
279 : ControlFile->checkPointCopy.oldestXidDB);
280 0 : printf(_("Latest checkpoint's oldestActiveXID: %u\n"),
281 : ControlFile->checkPointCopy.oldestActiveXid);
282 0 : printf(_("Latest checkpoint's oldestMultiXid: %u\n"),
283 : ControlFile->checkPointCopy.oldestMulti);
284 0 : printf(_("Latest checkpoint's oldestMulti's DB: %u\n"),
285 : ControlFile->checkPointCopy.oldestMultiDB);
286 0 : printf(_("Latest checkpoint's oldestCommitTsXid:%u\n"),
287 : ControlFile->checkPointCopy.oldestCommitTsXid);
288 0 : printf(_("Latest checkpoint's newestCommitTsXid:%u\n"),
289 : ControlFile->checkPointCopy.newestCommitTsXid);
290 0 : printf(_("Time of latest checkpoint: %s\n"),
291 : ckpttime_str);
292 0 : printf(_("Fake LSN counter for unlogged rels: %X/%08X\n"),
293 : LSN_FORMAT_ARGS(ControlFile->unloggedLSN));
294 0 : printf(_("Minimum recovery ending location: %X/%08X\n"),
295 : LSN_FORMAT_ARGS(ControlFile->minRecoveryPoint));
296 0 : printf(_("Min recovery ending loc's timeline: %u\n"),
297 : ControlFile->minRecoveryPointTLI);
298 0 : printf(_("Backup start location: %X/%08X\n"),
299 : LSN_FORMAT_ARGS(ControlFile->backupStartPoint));
300 0 : printf(_("Backup end location: %X/%08X\n"),
301 : LSN_FORMAT_ARGS(ControlFile->backupEndPoint));
302 0 : printf(_("End-of-backup record required: %s\n"),
303 : ControlFile->backupEndRequired ? _("yes") : _("no"));
304 0 : printf(_("wal_level setting: %s\n"),
305 : wal_level_str(ControlFile->wal_level));
306 0 : printf(_("wal_log_hints setting: %s\n"),
307 : ControlFile->wal_log_hints ? _("on") : _("off"));
308 0 : printf(_("max_connections setting: %d\n"),
309 : ControlFile->MaxConnections);
310 0 : printf(_("max_worker_processes setting: %d\n"),
311 : ControlFile->max_worker_processes);
312 0 : printf(_("max_wal_senders setting: %d\n"),
313 : ControlFile->max_wal_senders);
314 0 : printf(_("max_prepared_xacts setting: %d\n"),
315 : ControlFile->max_prepared_xacts);
316 0 : printf(_("max_locks_per_xact setting: %d\n"),
317 : ControlFile->max_locks_per_xact);
318 0 : printf(_("track_commit_timestamp setting: %s\n"),
319 : ControlFile->track_commit_timestamp ? _("on") : _("off"));
320 0 : printf(_("Maximum data alignment: %u\n"),
321 : ControlFile->maxAlign);
322 : /* we don't print floatFormat since can't say much useful about it */
323 0 : printf(_("Database block size: %u\n"),
324 : ControlFile->blcksz);
325 0 : printf(_("Blocks per segment of large relation: %u\n"),
326 : ControlFile->relseg_size);
327 0 : printf(_("Pages per SLRU segment: %u\n"),
328 : ControlFile->slru_pages_per_segment);
329 0 : printf(_("WAL block size: %u\n"),
330 : ControlFile->xlog_blcksz);
331 0 : printf(_("Bytes per WAL segment: %u\n"),
332 : ControlFile->xlog_seg_size);
333 0 : printf(_("Maximum length of identifiers: %u\n"),
334 : ControlFile->nameDataLen);
335 0 : printf(_("Maximum columns in an index: %u\n"),
336 : ControlFile->indexMaxKeys);
337 0 : printf(_("Maximum size of a TOAST chunk: %u\n"),
338 : ControlFile->toast_max_chunk_size);
339 0 : printf(_("Size of a large-object chunk: %u\n"),
340 : ControlFile->loblksize);
341 : /* This is no longer configurable, but users may still expect to see it: */
342 0 : printf(_("Date/time type storage: %s\n"),
343 : _("64-bit integers"));
344 0 : printf(_("Float8 argument passing: %s\n"),
345 : (ControlFile->float8ByVal ? _("by value") : _("by reference")));
346 0 : printf(_("Data page checksum version: %u\n"),
347 : ControlFile->data_checksum_version);
348 0 : printf(_("Default char data signedness: %s\n"),
349 : (ControlFile->default_char_signedness ? _("signed") : _("unsigned")));
350 0 : printf(_("Mock authentication nonce: %s\n"),
351 : mock_auth_nonce_str);
352 0 : return 0;
353 0 : }
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