Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * genfile.c
4 : * Functions for direct access to files
5 : *
6 : *
7 : * Copyright (c) 2004-2024, PostgreSQL Global Development Group
8 : *
9 : * Author: Andreas Pflug <pgadmin@pse-consulting.de>
10 : *
11 : * IDENTIFICATION
12 : * src/backend/utils/adt/genfile.c
13 : *
14 : *-------------------------------------------------------------------------
15 : */
16 : #include "postgres.h"
17 :
18 : #include <sys/file.h>
19 : #include <sys/stat.h>
20 : #include <unistd.h>
21 : #include <dirent.h>
22 :
23 : #include "access/htup_details.h"
24 : #include "access/xlog_internal.h"
25 : #include "catalog/pg_authid.h"
26 : #include "catalog/pg_tablespace_d.h"
27 : #include "catalog/pg_type.h"
28 : #include "funcapi.h"
29 : #include "mb/pg_wchar.h"
30 : #include "miscadmin.h"
31 : #include "postmaster/syslogger.h"
32 : #include "replication/slot.h"
33 : #include "storage/fd.h"
34 : #include "utils/acl.h"
35 : #include "utils/builtins.h"
36 : #include "utils/memutils.h"
37 : #include "utils/syscache.h"
38 : #include "utils/timestamp.h"
39 :
40 :
41 : /*
42 : * Convert a "text" filename argument to C string, and check it's allowable.
43 : *
44 : * Filename may be absolute or relative to the DataDir, but we only allow
45 : * absolute paths that match DataDir or Log_directory.
46 : *
47 : * This does a privilege check against the 'pg_read_server_files' role, so
48 : * this function is really only appropriate for callers who are only checking
49 : * 'read' access. Do not use this function if you are looking for a check
50 : * for 'write' or 'program' access without updating it to access the type
51 : * of check as an argument and checking the appropriate role membership.
52 : */
53 : static char *
54 19290 : convert_and_check_filename(text *arg)
55 : {
56 : char *filename;
57 :
58 19290 : filename = text_to_cstring(arg);
59 19290 : canonicalize_path(filename); /* filename can change length here */
60 :
61 : /*
62 : * Roles with privileges of the 'pg_read_server_files' role are allowed to
63 : * access any files on the server as the PG user, so no need to do any
64 : * further checks here.
65 : */
66 19290 : if (has_privs_of_role(GetUserId(), ROLE_PG_READ_SERVER_FILES))
67 5492 : return filename;
68 :
69 : /*
70 : * User isn't a member of the pg_read_server_files role, so check if it's
71 : * allowable
72 : */
73 13798 : if (is_absolute_path(filename))
74 : {
75 : /*
76 : * Allow absolute paths if within DataDir or Log_directory, even
77 : * though Log_directory might be outside DataDir.
78 : */
79 0 : if (!path_is_prefix_of_path(DataDir, filename) &&
80 0 : (!is_absolute_path(Log_directory) ||
81 0 : !path_is_prefix_of_path(Log_directory, filename)))
82 0 : ereport(ERROR,
83 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
84 : errmsg("absolute path not allowed")));
85 : }
86 13798 : else if (!path_is_relative_and_below_cwd(filename))
87 0 : ereport(ERROR,
88 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
89 : errmsg("path must be in or below the data directory")));
90 :
91 13798 : return filename;
92 : }
93 :
94 :
95 : /*
96 : * Read a section of a file, returning it as bytea
97 : *
98 : * Caller is responsible for all permissions checking.
99 : *
100 : * We read the whole of the file when bytes_to_read is negative.
101 : */
102 : static bytea *
103 4964 : read_binary_file(const char *filename, int64 seek_offset, int64 bytes_to_read,
104 : bool missing_ok)
105 : {
106 : bytea *buf;
107 4964 : size_t nbytes = 0;
108 : FILE *file;
109 :
110 : /* clamp request size to what we can actually deliver */
111 4964 : if (bytes_to_read > (int64) (MaxAllocSize - VARHDRSZ))
112 0 : ereport(ERROR,
113 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
114 : errmsg("requested length too large")));
115 :
116 4964 : if ((file = AllocateFile(filename, PG_BINARY_R)) == NULL)
117 : {
118 24 : if (missing_ok && errno == ENOENT)
119 12 : return NULL;
120 : else
121 12 : ereport(ERROR,
122 : (errcode_for_file_access(),
123 : errmsg("could not open file \"%s\" for reading: %m",
124 : filename)));
125 : }
126 :
127 4940 : if (fseeko(file, (off_t) seek_offset,
128 : (seek_offset >= 0) ? SEEK_SET : SEEK_END) != 0)
129 0 : ereport(ERROR,
130 : (errcode_for_file_access(),
131 : errmsg("could not seek in file \"%s\": %m", filename)));
132 :
133 4940 : if (bytes_to_read >= 0)
134 : {
135 : /* If passed explicit read size just do it */
136 4894 : buf = (bytea *) palloc((Size) bytes_to_read + VARHDRSZ);
137 :
138 4894 : nbytes = fread(VARDATA(buf), 1, (size_t) bytes_to_read, file);
139 : }
140 : else
141 : {
142 : /* Negative read size, read rest of file */
143 : StringInfoData sbuf;
144 :
145 46 : initStringInfo(&sbuf);
146 : /* Leave room in the buffer for the varlena length word */
147 46 : sbuf.len += VARHDRSZ;
148 : Assert(sbuf.len < sbuf.maxlen);
149 :
150 116 : while (!(feof(file) || ferror(file)))
151 : {
152 : size_t rbytes;
153 :
154 : /* Minimum amount to read at a time */
155 : #define MIN_READ_SIZE 4096
156 :
157 : /*
158 : * If not at end of file, and sbuf.len is equal to MaxAllocSize -
159 : * 1, then either the file is too large, or there is nothing left
160 : * to read. Attempt to read one more byte to see if the end of
161 : * file has been reached. If not, the file is too large; we'd
162 : * rather give the error message for that ourselves.
163 : */
164 70 : if (sbuf.len == MaxAllocSize - 1)
165 : {
166 : char rbuf[1];
167 :
168 0 : if (fread(rbuf, 1, 1, file) != 0 || !feof(file))
169 0 : ereport(ERROR,
170 : (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
171 : errmsg("file length too large")));
172 : else
173 : break;
174 : }
175 :
176 : /* OK, ensure that we can read at least MIN_READ_SIZE */
177 70 : enlargeStringInfo(&sbuf, MIN_READ_SIZE);
178 :
179 : /*
180 : * stringinfo.c likes to allocate in powers of 2, so it's likely
181 : * that much more space is available than we asked for. Use all
182 : * of it, rather than making more fread calls than necessary.
183 : */
184 70 : rbytes = fread(sbuf.data + sbuf.len, 1,
185 70 : (size_t) (sbuf.maxlen - sbuf.len - 1), file);
186 70 : sbuf.len += rbytes;
187 70 : nbytes += rbytes;
188 : }
189 :
190 : /* Now we can commandeer the stringinfo's buffer as the result */
191 46 : buf = (bytea *) sbuf.data;
192 : }
193 :
194 4940 : if (ferror(file))
195 0 : ereport(ERROR,
196 : (errcode_for_file_access(),
197 : errmsg("could not read file \"%s\": %m", filename)));
198 :
199 4940 : SET_VARSIZE(buf, nbytes + VARHDRSZ);
200 :
201 4940 : FreeFile(file);
202 :
203 4940 : return buf;
204 : }
205 :
206 : /*
207 : * Similar to read_binary_file, but we verify that the contents are valid
208 : * in the database encoding.
209 : */
210 : static text *
211 24 : read_text_file(const char *filename, int64 seek_offset, int64 bytes_to_read,
212 : bool missing_ok)
213 : {
214 : bytea *buf;
215 :
216 24 : buf = read_binary_file(filename, seek_offset, bytes_to_read, missing_ok);
217 :
218 18 : if (buf != NULL)
219 : {
220 : /* Make sure the input is valid */
221 12 : pg_verifymbstr(VARDATA(buf), VARSIZE(buf) - VARHDRSZ, false);
222 :
223 : /* OK, we can cast it to text safely */
224 12 : return (text *) buf;
225 : }
226 : else
227 6 : return NULL;
228 : }
229 :
230 : /*
231 : * Read a section of a file, returning it as text
232 : *
233 : * No superuser check done here- instead privileges are handled by the
234 : * GRANT system.
235 : *
236 : * If read_to_eof is true, bytes_to_read must be -1, otherwise negative values
237 : * are not allowed for bytes_to_read.
238 : */
239 : static text *
240 36 : pg_read_file_common(text *filename_t, int64 seek_offset, int64 bytes_to_read,
241 : bool read_to_eof, bool missing_ok)
242 : {
243 36 : if (read_to_eof)
244 : Assert(bytes_to_read == -1);
245 18 : else if (bytes_to_read < 0)
246 12 : ereport(ERROR,
247 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
248 : errmsg("requested length cannot be negative")));
249 :
250 24 : return read_text_file(convert_and_check_filename(filename_t),
251 : seek_offset, bytes_to_read, missing_ok);
252 : }
253 :
254 : /*
255 : * Read a section of a file, returning it as bytea
256 : *
257 : * Parameters are interpreted the same as pg_read_file_common().
258 : */
259 : static bytea *
260 4952 : pg_read_binary_file_common(text *filename_t,
261 : int64 seek_offset, int64 bytes_to_read,
262 : bool read_to_eof, bool missing_ok)
263 : {
264 4952 : if (read_to_eof)
265 : Assert(bytes_to_read == -1);
266 4900 : else if (bytes_to_read < 0)
267 12 : ereport(ERROR,
268 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
269 : errmsg("requested length cannot be negative")));
270 :
271 4940 : return read_binary_file(convert_and_check_filename(filename_t),
272 : seek_offset, bytes_to_read, missing_ok);
273 : }
274 :
275 :
276 : /*
277 : * Wrapper functions for the variants of SQL functions pg_read_file() and
278 : * pg_read_binary_file().
279 : *
280 : * These are necessary to pass the sanity check in opr_sanity, which checks
281 : * that all built-in functions that share the implementing C function take
282 : * the same number of arguments.
283 : */
284 : Datum
285 12 : pg_read_file_off_len(PG_FUNCTION_ARGS)
286 : {
287 12 : text *filename_t = PG_GETARG_TEXT_PP(0);
288 12 : int64 seek_offset = PG_GETARG_INT64(1);
289 12 : int64 bytes_to_read = PG_GETARG_INT64(2);
290 : text *ret;
291 :
292 12 : ret = pg_read_file_common(filename_t, seek_offset, bytes_to_read,
293 : false, false);
294 6 : if (!ret)
295 0 : PG_RETURN_NULL();
296 :
297 6 : PG_RETURN_TEXT_P(ret);
298 : }
299 :
300 : Datum
301 6 : pg_read_file_off_len_missing(PG_FUNCTION_ARGS)
302 : {
303 6 : text *filename_t = PG_GETARG_TEXT_PP(0);
304 6 : int64 seek_offset = PG_GETARG_INT64(1);
305 6 : int64 bytes_to_read = PG_GETARG_INT64(2);
306 6 : bool missing_ok = PG_GETARG_BOOL(3);
307 : text *ret;
308 :
309 6 : ret = pg_read_file_common(filename_t, seek_offset, bytes_to_read,
310 : false, missing_ok);
311 :
312 0 : if (!ret)
313 0 : PG_RETURN_NULL();
314 :
315 0 : PG_RETURN_TEXT_P(ret);
316 : }
317 :
318 : Datum
319 12 : pg_read_file_all(PG_FUNCTION_ARGS)
320 : {
321 12 : text *filename_t = PG_GETARG_TEXT_PP(0);
322 : text *ret;
323 :
324 12 : ret = pg_read_file_common(filename_t, 0, -1, true, false);
325 :
326 6 : if (!ret)
327 0 : PG_RETURN_NULL();
328 :
329 6 : PG_RETURN_TEXT_P(ret);
330 : }
331 :
332 : Datum
333 6 : pg_read_file_all_missing(PG_FUNCTION_ARGS)
334 : {
335 6 : text *filename_t = PG_GETARG_TEXT_PP(0);
336 6 : bool missing_ok = PG_GETARG_BOOL(1);
337 : text *ret;
338 :
339 6 : ret = pg_read_file_common(filename_t, 0, -1, true, missing_ok);
340 :
341 6 : if (!ret)
342 6 : PG_RETURN_NULL();
343 :
344 0 : PG_RETURN_TEXT_P(ret);
345 : }
346 :
347 : Datum
348 12 : pg_read_binary_file_off_len(PG_FUNCTION_ARGS)
349 : {
350 12 : text *filename_t = PG_GETARG_TEXT_PP(0);
351 12 : int64 seek_offset = PG_GETARG_INT64(1);
352 12 : int64 bytes_to_read = PG_GETARG_INT64(2);
353 : text *ret;
354 :
355 12 : ret = pg_read_binary_file_common(filename_t, seek_offset, bytes_to_read,
356 : false, false);
357 6 : if (!ret)
358 0 : PG_RETURN_NULL();
359 :
360 6 : PG_RETURN_BYTEA_P(ret);
361 : }
362 :
363 : Datum
364 4888 : pg_read_binary_file_off_len_missing(PG_FUNCTION_ARGS)
365 : {
366 4888 : text *filename_t = PG_GETARG_TEXT_PP(0);
367 4888 : int64 seek_offset = PG_GETARG_INT64(1);
368 4888 : int64 bytes_to_read = PG_GETARG_INT64(2);
369 4888 : bool missing_ok = PG_GETARG_BOOL(3);
370 : text *ret;
371 :
372 4888 : ret = pg_read_binary_file_common(filename_t, seek_offset, bytes_to_read,
373 : false, missing_ok);
374 4882 : if (!ret)
375 0 : PG_RETURN_NULL();
376 :
377 4882 : PG_RETURN_BYTEA_P(ret);
378 : }
379 :
380 : Datum
381 46 : pg_read_binary_file_all(PG_FUNCTION_ARGS)
382 : {
383 46 : text *filename_t = PG_GETARG_TEXT_PP(0);
384 : text *ret;
385 :
386 46 : ret = pg_read_binary_file_common(filename_t, 0, -1, true, false);
387 :
388 40 : if (!ret)
389 0 : PG_RETURN_NULL();
390 :
391 40 : PG_RETURN_BYTEA_P(ret);
392 : }
393 :
394 : Datum
395 6 : pg_read_binary_file_all_missing(PG_FUNCTION_ARGS)
396 : {
397 6 : text *filename_t = PG_GETARG_TEXT_PP(0);
398 6 : bool missing_ok = PG_GETARG_BOOL(1);
399 : text *ret;
400 :
401 6 : ret = pg_read_binary_file_common(filename_t, 0, -1, true, missing_ok);
402 :
403 6 : if (!ret)
404 6 : PG_RETURN_NULL();
405 :
406 0 : PG_RETURN_BYTEA_P(ret);
407 : }
408 :
409 : /*
410 : * stat a file
411 : */
412 : Datum
413 13932 : pg_stat_file(PG_FUNCTION_ARGS)
414 : {
415 13932 : text *filename_t = PG_GETARG_TEXT_PP(0);
416 : char *filename;
417 : struct stat fst;
418 : Datum values[6];
419 : bool isnull[6];
420 : HeapTuple tuple;
421 : TupleDesc tupdesc;
422 13932 : bool missing_ok = false;
423 :
424 : /* check the optional argument */
425 13932 : if (PG_NARGS() == 2)
426 13918 : missing_ok = PG_GETARG_BOOL(1);
427 :
428 13932 : filename = convert_and_check_filename(filename_t);
429 :
430 13932 : if (stat(filename, &fst) < 0)
431 : {
432 2 : if (missing_ok && errno == ENOENT)
433 0 : PG_RETURN_NULL();
434 : else
435 2 : ereport(ERROR,
436 : (errcode_for_file_access(),
437 : errmsg("could not stat file \"%s\": %m", filename)));
438 : }
439 :
440 : /*
441 : * This record type had better match the output parameters declared for me
442 : * in pg_proc.h.
443 : */
444 13930 : tupdesc = CreateTemplateTupleDesc(6);
445 13930 : TupleDescInitEntry(tupdesc, (AttrNumber) 1,
446 : "size", INT8OID, -1, 0);
447 13930 : TupleDescInitEntry(tupdesc, (AttrNumber) 2,
448 : "access", TIMESTAMPTZOID, -1, 0);
449 13930 : TupleDescInitEntry(tupdesc, (AttrNumber) 3,
450 : "modification", TIMESTAMPTZOID, -1, 0);
451 13930 : TupleDescInitEntry(tupdesc, (AttrNumber) 4,
452 : "change", TIMESTAMPTZOID, -1, 0);
453 13930 : TupleDescInitEntry(tupdesc, (AttrNumber) 5,
454 : "creation", TIMESTAMPTZOID, -1, 0);
455 13930 : TupleDescInitEntry(tupdesc, (AttrNumber) 6,
456 : "isdir", BOOLOID, -1, 0);
457 13930 : BlessTupleDesc(tupdesc);
458 :
459 13930 : memset(isnull, false, sizeof(isnull));
460 :
461 13930 : values[0] = Int64GetDatum((int64) fst.st_size);
462 13930 : values[1] = TimestampTzGetDatum(time_t_to_timestamptz(fst.st_atime));
463 13930 : values[2] = TimestampTzGetDatum(time_t_to_timestamptz(fst.st_mtime));
464 : /* Unix has file status change time, while Win32 has creation time */
465 : #if !defined(WIN32) && !defined(__CYGWIN__)
466 13930 : values[3] = TimestampTzGetDatum(time_t_to_timestamptz(fst.st_ctime));
467 13930 : isnull[4] = true;
468 : #else
469 : isnull[3] = true;
470 : values[4] = TimestampTzGetDatum(time_t_to_timestamptz(fst.st_ctime));
471 : #endif
472 13930 : values[5] = BoolGetDatum(S_ISDIR(fst.st_mode));
473 :
474 13930 : tuple = heap_form_tuple(tupdesc, values, isnull);
475 :
476 13930 : pfree(filename);
477 :
478 13930 : PG_RETURN_DATUM(HeapTupleGetDatum(tuple));
479 : }
480 :
481 : /*
482 : * stat a file (1 argument version)
483 : *
484 : * note: this wrapper is necessary to pass the sanity check in opr_sanity,
485 : * which checks that all built-in functions that share the implementing C
486 : * function take the same number of arguments
487 : */
488 : Datum
489 14 : pg_stat_file_1arg(PG_FUNCTION_ARGS)
490 : {
491 14 : return pg_stat_file(fcinfo);
492 : }
493 :
494 : /*
495 : * List a directory (returns the filenames only)
496 : */
497 : Datum
498 394 : pg_ls_dir(PG_FUNCTION_ARGS)
499 : {
500 394 : ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
501 : char *location;
502 394 : bool missing_ok = false;
503 394 : bool include_dot_dirs = false;
504 : DIR *dirdesc;
505 : struct dirent *de;
506 :
507 394 : location = convert_and_check_filename(PG_GETARG_TEXT_PP(0));
508 :
509 : /* check the optional arguments */
510 394 : if (PG_NARGS() == 3)
511 : {
512 376 : if (!PG_ARGISNULL(1))
513 376 : missing_ok = PG_GETARG_BOOL(1);
514 376 : if (!PG_ARGISNULL(2))
515 376 : include_dot_dirs = PG_GETARG_BOOL(2);
516 : }
517 :
518 394 : InitMaterializedSRF(fcinfo, MAT_SRF_USE_EXPECTED_DESC);
519 :
520 394 : dirdesc = AllocateDir(location);
521 394 : if (!dirdesc)
522 : {
523 : /* Return empty tuplestore if appropriate */
524 12 : if (missing_ok && errno == ENOENT)
525 6 : return (Datum) 0;
526 : /* Otherwise, we can let ReadDir() throw the error */
527 : }
528 :
529 15620 : while ((de = ReadDir(dirdesc, location)) != NULL)
530 : {
531 : Datum values[1];
532 : bool nulls[1];
533 :
534 15232 : if (!include_dot_dirs &&
535 15076 : (strcmp(de->d_name, ".") == 0 ||
536 14700 : strcmp(de->d_name, "..") == 0))
537 752 : continue;
538 :
539 14480 : values[0] = CStringGetTextDatum(de->d_name);
540 14480 : nulls[0] = false;
541 :
542 14480 : tuplestore_putvalues(rsinfo->setResult, rsinfo->setDesc,
543 : values, nulls);
544 : }
545 :
546 382 : FreeDir(dirdesc);
547 382 : return (Datum) 0;
548 : }
549 :
550 : /*
551 : * List a directory (1 argument version)
552 : *
553 : * note: this wrapper is necessary to pass the sanity check in opr_sanity,
554 : * which checks that all built-in functions that share the implementing C
555 : * function take the same number of arguments.
556 : */
557 : Datum
558 18 : pg_ls_dir_1arg(PG_FUNCTION_ARGS)
559 : {
560 18 : return pg_ls_dir(fcinfo);
561 : }
562 :
563 : /*
564 : * Generic function to return a directory listing of files.
565 : *
566 : * If the directory isn't there, silently return an empty set if missing_ok.
567 : * Other unreadable-directory cases throw an error.
568 : */
569 : static Datum
570 36 : pg_ls_dir_files(FunctionCallInfo fcinfo, const char *dir, bool missing_ok)
571 : {
572 36 : ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
573 : DIR *dirdesc;
574 : struct dirent *de;
575 :
576 36 : InitMaterializedSRF(fcinfo, 0);
577 :
578 : /*
579 : * Now walk the directory. Note that we must do this within a single SRF
580 : * call, not leave the directory open across multiple calls, since we
581 : * can't count on the SRF being run to completion.
582 : */
583 36 : dirdesc = AllocateDir(dir);
584 36 : if (!dirdesc)
585 : {
586 : /* Return empty tuplestore if appropriate */
587 0 : if (missing_ok && errno == ENOENT)
588 0 : return (Datum) 0;
589 : /* Otherwise, we can let ReadDir() throw the error */
590 : }
591 :
592 938 : while ((de = ReadDir(dirdesc, dir)) != NULL)
593 : {
594 : Datum values[3];
595 : bool nulls[3];
596 : char path[MAXPGPATH * 2];
597 : struct stat attrib;
598 :
599 : /* Skip hidden files */
600 902 : if (de->d_name[0] == '.')
601 120 : continue;
602 :
603 : /* Get the file info */
604 830 : snprintf(path, sizeof(path), "%s/%s", dir, de->d_name);
605 830 : if (stat(path, &attrib) < 0)
606 : {
607 : /* Ignore concurrently-deleted files, else complain */
608 0 : if (errno == ENOENT)
609 0 : continue;
610 0 : ereport(ERROR,
611 : (errcode_for_file_access(),
612 : errmsg("could not stat file \"%s\": %m", path)));
613 : }
614 :
615 : /* Ignore anything but regular files */
616 830 : if (!S_ISREG(attrib.st_mode))
617 48 : continue;
618 :
619 782 : values[0] = CStringGetTextDatum(de->d_name);
620 782 : values[1] = Int64GetDatum((int64) attrib.st_size);
621 782 : values[2] = TimestampTzGetDatum(time_t_to_timestamptz(attrib.st_mtime));
622 782 : memset(nulls, 0, sizeof(nulls));
623 :
624 782 : tuplestore_putvalues(rsinfo->setResult, rsinfo->setDesc, values, nulls);
625 : }
626 :
627 36 : FreeDir(dirdesc);
628 36 : return (Datum) 0;
629 : }
630 :
631 : /* Function to return the list of files in the log directory */
632 : Datum
633 0 : pg_ls_logdir(PG_FUNCTION_ARGS)
634 : {
635 0 : return pg_ls_dir_files(fcinfo, Log_directory, false);
636 : }
637 :
638 : /* Function to return the list of files in the WAL directory */
639 : Datum
640 24 : pg_ls_waldir(PG_FUNCTION_ARGS)
641 : {
642 24 : return pg_ls_dir_files(fcinfo, XLOGDIR, false);
643 : }
644 :
645 : /*
646 : * Generic function to return the list of files in pgsql_tmp
647 : */
648 : static Datum
649 0 : pg_ls_tmpdir(FunctionCallInfo fcinfo, Oid tblspc)
650 : {
651 : char path[MAXPGPATH];
652 :
653 0 : if (!SearchSysCacheExists1(TABLESPACEOID, ObjectIdGetDatum(tblspc)))
654 0 : ereport(ERROR,
655 : (errcode(ERRCODE_UNDEFINED_OBJECT),
656 : errmsg("tablespace with OID %u does not exist",
657 : tblspc)));
658 :
659 0 : TempTablespacePath(path, tblspc);
660 0 : return pg_ls_dir_files(fcinfo, path, true);
661 : }
662 :
663 : /*
664 : * Function to return the list of temporary files in the pg_default tablespace's
665 : * pgsql_tmp directory
666 : */
667 : Datum
668 0 : pg_ls_tmpdir_noargs(PG_FUNCTION_ARGS)
669 : {
670 0 : return pg_ls_tmpdir(fcinfo, DEFAULTTABLESPACE_OID);
671 : }
672 :
673 : /*
674 : * Function to return the list of temporary files in the specified tablespace's
675 : * pgsql_tmp directory
676 : */
677 : Datum
678 0 : pg_ls_tmpdir_1arg(PG_FUNCTION_ARGS)
679 : {
680 0 : return pg_ls_tmpdir(fcinfo, PG_GETARG_OID(0));
681 : }
682 :
683 : /*
684 : * Function to return the list of files in the WAL archive status directory.
685 : */
686 : Datum
687 6 : pg_ls_archive_statusdir(PG_FUNCTION_ARGS)
688 : {
689 6 : return pg_ls_dir_files(fcinfo, XLOGDIR "/archive_status", true);
690 : }
691 :
692 : /*
693 : * Function to return the list of files in the pg_logical/snapshots directory.
694 : */
695 : Datum
696 2 : pg_ls_logicalsnapdir(PG_FUNCTION_ARGS)
697 : {
698 2 : return pg_ls_dir_files(fcinfo, "pg_logical/snapshots", false);
699 : }
700 :
701 : /*
702 : * Function to return the list of files in the pg_logical/mappings directory.
703 : */
704 : Datum
705 2 : pg_ls_logicalmapdir(PG_FUNCTION_ARGS)
706 : {
707 2 : return pg_ls_dir_files(fcinfo, "pg_logical/mappings", false);
708 : }
709 :
710 : /*
711 : * Function to return the list of files in the pg_replslot/<replication_slot>
712 : * directory.
713 : */
714 : Datum
715 4 : pg_ls_replslotdir(PG_FUNCTION_ARGS)
716 : {
717 : text *slotname_t;
718 : char path[MAXPGPATH];
719 : char *slotname;
720 :
721 4 : slotname_t = PG_GETARG_TEXT_PP(0);
722 :
723 4 : slotname = text_to_cstring(slotname_t);
724 :
725 4 : if (!SearchNamedReplicationSlot(slotname, true))
726 2 : ereport(ERROR,
727 : (errcode(ERRCODE_UNDEFINED_OBJECT),
728 : errmsg("replication slot \"%s\" does not exist",
729 : slotname)));
730 :
731 2 : snprintf(path, sizeof(path), "pg_replslot/%s", slotname);
732 2 : return pg_ls_dir_files(fcinfo, path, false);
733 : }
|
