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genfile.c
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1 /*-------------------------------------------------------------------------
2  *
3  * genfile.c
4  * Functions for direct access to files
5  *
6  *
7  * Copyright (c) 2004-2022, 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 *
55 {
56  char *filename;
57 
59  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  if (has_privs_of_role(GetUserId(), ROLE_PG_READ_SERVER_FILES))
67  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  */
74  {
75  /*
76  * Allow absolute paths if within DataDir or Log_directory, even
77  * though Log_directory might be outside DataDir.
78  */
82  ereport(ERROR,
83  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
84  errmsg("absolute path not allowed")));
85  }
87  ereport(ERROR,
88  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
89  errmsg("path must be in or below the current directory")));
90 
91  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 read_binary_file(const char *filename, int64 seek_offset, int64 bytes_to_read,
104  bool missing_ok)
105 {
106  bytea *buf;
107  size_t nbytes = 0;
108  FILE *file;
109 
110  /* clamp request size to what we can actually deliver */
111  if (bytes_to_read > (int64) (MaxAllocSize - VARHDRSZ))
112  ereport(ERROR,
113  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
114  errmsg("requested length too large")));
115 
116  if ((file = AllocateFile(filename, PG_BINARY_R)) == NULL)
117  {
118  if (missing_ok && errno == ENOENT)
119  return NULL;
120  else
121  ereport(ERROR,
123  errmsg("could not open file \"%s\" for reading: %m",
124  filename)));
125  }
126 
127  if (fseeko(file, (off_t) seek_offset,
128  (seek_offset >= 0) ? SEEK_SET : SEEK_END) != 0)
129  ereport(ERROR,
131  errmsg("could not seek in file \"%s\": %m", filename)));
132 
133  if (bytes_to_read >= 0)
134  {
135  /* If passed explicit read size just do it */
136  buf = (bytea *) palloc((Size) bytes_to_read + VARHDRSZ);
137 
138  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  initStringInfo(&sbuf);
146  /* Leave room in the buffer for the varlena length word */
147  sbuf.len += VARHDRSZ;
148  Assert(sbuf.len < sbuf.maxlen);
149 
150  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  if (sbuf.len == MaxAllocSize - 1)
165  {
166  char rbuf[1];
167 
168  if (fread(rbuf, 1, 1, file) != 0 || !feof(file))
169  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 */
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  rbytes = fread(sbuf.data + sbuf.len, 1,
185  (size_t) (sbuf.maxlen - sbuf.len - 1), file);
186  sbuf.len += rbytes;
187  nbytes += rbytes;
188  }
189 
190  /* Now we can commandeer the stringinfo's buffer as the result */
191  buf = (bytea *) sbuf.data;
192  }
193 
194  if (ferror(file))
195  ereport(ERROR,
197  errmsg("could not read file \"%s\": %m", filename)));
198 
199  SET_VARSIZE(buf, nbytes + VARHDRSZ);
200 
201  FreeFile(file);
202 
203  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 read_text_file(const char *filename, int64 seek_offset, int64 bytes_to_read,
212  bool missing_ok)
213 {
214  bytea *buf;
215 
216  buf = read_binary_file(filename, seek_offset, bytes_to_read, missing_ok);
217 
218  if (buf != NULL)
219  {
220  /* Make sure the input is valid */
222 
223  /* OK, we can cast it to text safely */
224  return (text *) buf;
225  }
226  else
227  return NULL;
228 }
229 
230 /*
231  * Read a section of a file, returning it as text
232  *
233  * This function is kept to support adminpack 1.0.
234  */
235 Datum
237 {
238  text *filename_t = PG_GETARG_TEXT_PP(0);
239  int64 seek_offset = 0;
240  int64 bytes_to_read = -1;
241  bool missing_ok = false;
242  char *filename;
243  text *result;
244 
245  if (!superuser())
246  ereport(ERROR,
247  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
248  errmsg("must be superuser to read files with adminpack 1.0"),
249  /* translator: %s is a SQL function name */
250  errhint("Consider using %s, which is part of core, instead.",
251  "pg_read_file()")));
252 
253  /* handle optional arguments */
254  if (PG_NARGS() >= 3)
255  {
256  seek_offset = PG_GETARG_INT64(1);
257  bytes_to_read = PG_GETARG_INT64(2);
258 
259  if (bytes_to_read < 0)
260  ereport(ERROR,
261  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
262  errmsg("requested length cannot be negative")));
263  }
264  if (PG_NARGS() >= 4)
265  missing_ok = PG_GETARG_BOOL(3);
266 
267  filename = convert_and_check_filename(filename_t);
268 
269  result = read_text_file(filename, seek_offset, bytes_to_read, missing_ok);
270  if (result)
271  PG_RETURN_TEXT_P(result);
272  else
273  PG_RETURN_NULL();
274 }
275 
276 /*
277  * Read a section of a file, returning it as text
278  *
279  * No superuser check done here- instead privileges are handled by the
280  * GRANT system.
281  */
282 Datum
284 {
285  text *filename_t = PG_GETARG_TEXT_PP(0);
286  int64 seek_offset = 0;
287  int64 bytes_to_read = -1;
288  bool missing_ok = false;
289  char *filename;
290  text *result;
291 
292  /* handle optional arguments */
293  if (PG_NARGS() >= 3)
294  {
295  seek_offset = PG_GETARG_INT64(1);
296  bytes_to_read = PG_GETARG_INT64(2);
297 
298  if (bytes_to_read < 0)
299  ereport(ERROR,
300  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
301  errmsg("requested length cannot be negative")));
302  }
303  if (PG_NARGS() >= 4)
304  missing_ok = PG_GETARG_BOOL(3);
305 
306  filename = convert_and_check_filename(filename_t);
307 
308  result = read_text_file(filename, seek_offset, bytes_to_read, missing_ok);
309  if (result)
310  PG_RETURN_TEXT_P(result);
311  else
312  PG_RETURN_NULL();
313 }
314 
315 /*
316  * Read a section of a file, returning it as bytea
317  */
318 Datum
320 {
321  text *filename_t = PG_GETARG_TEXT_PP(0);
322  int64 seek_offset = 0;
323  int64 bytes_to_read = -1;
324  bool missing_ok = false;
325  char *filename;
326  bytea *result;
327 
328  /* handle optional arguments */
329  if (PG_NARGS() >= 3)
330  {
331  seek_offset = PG_GETARG_INT64(1);
332  bytes_to_read = PG_GETARG_INT64(2);
333 
334  if (bytes_to_read < 0)
335  ereport(ERROR,
336  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
337  errmsg("requested length cannot be negative")));
338  }
339  if (PG_NARGS() >= 4)
340  missing_ok = PG_GETARG_BOOL(3);
341 
342  filename = convert_and_check_filename(filename_t);
343 
344  result = read_binary_file(filename, seek_offset,
345  bytes_to_read, missing_ok);
346  if (result)
347  PG_RETURN_BYTEA_P(result);
348  else
349  PG_RETURN_NULL();
350 }
351 
352 
353 /*
354  * Wrapper functions for the 1 and 3 argument variants of pg_read_file_v2()
355  * and pg_read_binary_file().
356  *
357  * These are necessary to pass the sanity check in opr_sanity, which checks
358  * that all built-in functions that share the implementing C function take
359  * the same number of arguments.
360  */
361 Datum
363 {
364  return pg_read_file_v2(fcinfo);
365 }
366 
367 Datum
369 {
370  return pg_read_file_v2(fcinfo);
371 }
372 
373 Datum
375 {
376  return pg_read_binary_file(fcinfo);
377 }
378 
379 Datum
381 {
382  return pg_read_binary_file(fcinfo);
383 }
384 
385 /*
386  * stat a file
387  */
388 Datum
390 {
391  text *filename_t = PG_GETARG_TEXT_PP(0);
392  char *filename;
393  struct stat fst;
394  Datum values[6];
395  bool isnull[6];
396  HeapTuple tuple;
397  TupleDesc tupdesc;
398  bool missing_ok = false;
399 
400  /* check the optional argument */
401  if (PG_NARGS() == 2)
402  missing_ok = PG_GETARG_BOOL(1);
403 
404  filename = convert_and_check_filename(filename_t);
405 
406  if (stat(filename, &fst) < 0)
407  {
408  if (missing_ok && errno == ENOENT)
409  PG_RETURN_NULL();
410  else
411  ereport(ERROR,
413  errmsg("could not stat file \"%s\": %m", filename)));
414  }
415 
416  /*
417  * This record type had better match the output parameters declared for me
418  * in pg_proc.h.
419  */
420  tupdesc = CreateTemplateTupleDesc(6);
421  TupleDescInitEntry(tupdesc, (AttrNumber) 1,
422  "size", INT8OID, -1, 0);
423  TupleDescInitEntry(tupdesc, (AttrNumber) 2,
424  "access", TIMESTAMPTZOID, -1, 0);
425  TupleDescInitEntry(tupdesc, (AttrNumber) 3,
426  "modification", TIMESTAMPTZOID, -1, 0);
427  TupleDescInitEntry(tupdesc, (AttrNumber) 4,
428  "change", TIMESTAMPTZOID, -1, 0);
429  TupleDescInitEntry(tupdesc, (AttrNumber) 5,
430  "creation", TIMESTAMPTZOID, -1, 0);
431  TupleDescInitEntry(tupdesc, (AttrNumber) 6,
432  "isdir", BOOLOID, -1, 0);
433  BlessTupleDesc(tupdesc);
434 
435  memset(isnull, false, sizeof(isnull));
436 
437  values[0] = Int64GetDatum((int64) fst.st_size);
440  /* Unix has file status change time, while Win32 has creation time */
441 #if !defined(WIN32) && !defined(__CYGWIN__)
443  isnull[4] = true;
444 #else
445  isnull[3] = true;
447 #endif
448  values[5] = BoolGetDatum(S_ISDIR(fst.st_mode));
449 
450  tuple = heap_form_tuple(tupdesc, values, isnull);
451 
452  pfree(filename);
453 
455 }
456 
457 /*
458  * stat a file (1 argument version)
459  *
460  * note: this wrapper is necessary to pass the sanity check in opr_sanity,
461  * which checks that all built-in functions that share the implementing C
462  * function take the same number of arguments
463  */
464 Datum
466 {
467  return pg_stat_file(fcinfo);
468 }
469 
470 /*
471  * List a directory (returns the filenames only)
472  */
473 Datum
475 {
476  ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
477  char *location;
478  bool missing_ok = false;
479  bool include_dot_dirs = false;
480  DIR *dirdesc;
481  struct dirent *de;
482 
484 
485  /* check the optional arguments */
486  if (PG_NARGS() == 3)
487  {
488  if (!PG_ARGISNULL(1))
489  missing_ok = PG_GETARG_BOOL(1);
490  if (!PG_ARGISNULL(2))
491  include_dot_dirs = PG_GETARG_BOOL(2);
492  }
493 
495 
496  dirdesc = AllocateDir(location);
497  if (!dirdesc)
498  {
499  /* Return empty tuplestore if appropriate */
500  if (missing_ok && errno == ENOENT)
501  return (Datum) 0;
502  /* Otherwise, we can let ReadDir() throw the error */
503  }
504 
505  while ((de = ReadDir(dirdesc, location)) != NULL)
506  {
507  Datum values[1];
508  bool nulls[1];
509 
510  if (!include_dot_dirs &&
511  (strcmp(de->d_name, ".") == 0 ||
512  strcmp(de->d_name, "..") == 0))
513  continue;
514 
515  values[0] = CStringGetTextDatum(de->d_name);
516  nulls[0] = false;
517 
518  tuplestore_putvalues(rsinfo->setResult, rsinfo->setDesc,
519  values, nulls);
520  }
521 
522  FreeDir(dirdesc);
523  return (Datum) 0;
524 }
525 
526 /*
527  * List a directory (1 argument version)
528  *
529  * note: this wrapper is necessary to pass the sanity check in opr_sanity,
530  * which checks that all built-in functions that share the implementing C
531  * function take the same number of arguments.
532  */
533 Datum
535 {
536  return pg_ls_dir(fcinfo);
537 }
538 
539 /*
540  * Generic function to return a directory listing of files.
541  *
542  * If the directory isn't there, silently return an empty set if missing_ok.
543  * Other unreadable-directory cases throw an error.
544  */
545 static Datum
546 pg_ls_dir_files(FunctionCallInfo fcinfo, const char *dir, bool missing_ok)
547 {
548  ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
549  DIR *dirdesc;
550  struct dirent *de;
551 
552  SetSingleFuncCall(fcinfo, 0);
553 
554  /*
555  * Now walk the directory. Note that we must do this within a single SRF
556  * call, not leave the directory open across multiple calls, since we
557  * can't count on the SRF being run to completion.
558  */
559  dirdesc = AllocateDir(dir);
560  if (!dirdesc)
561  {
562  /* Return empty tuplestore if appropriate */
563  if (missing_ok && errno == ENOENT)
564  return (Datum) 0;
565  /* Otherwise, we can let ReadDir() throw the error */
566  }
567 
568  while ((de = ReadDir(dirdesc, dir)) != NULL)
569  {
570  Datum values[3];
571  bool nulls[3];
572  char path[MAXPGPATH * 2];
573  struct stat attrib;
574 
575  /* Skip hidden files */
576  if (de->d_name[0] == '.')
577  continue;
578 
579  /* Get the file info */
580  snprintf(path, sizeof(path), "%s/%s", dir, de->d_name);
581  if (stat(path, &attrib) < 0)
582  {
583  /* Ignore concurrently-deleted files, else complain */
584  if (errno == ENOENT)
585  continue;
586  ereport(ERROR,
588  errmsg("could not stat file \"%s\": %m", path)));
589  }
590 
591  /* Ignore anything but regular files */
592  if (!S_ISREG(attrib.st_mode))
593  continue;
594 
595  values[0] = CStringGetTextDatum(de->d_name);
596  values[1] = Int64GetDatum((int64) attrib.st_size);
598  memset(nulls, 0, sizeof(nulls));
599 
600  tuplestore_putvalues(rsinfo->setResult, rsinfo->setDesc, values, nulls);
601  }
602 
603  FreeDir(dirdesc);
604  return (Datum) 0;
605 }
606 
607 /* Function to return the list of files in the log directory */
608 Datum
610 {
611  return pg_ls_dir_files(fcinfo, Log_directory, false);
612 }
613 
614 /* Function to return the list of files in the WAL directory */
615 Datum
617 {
618  return pg_ls_dir_files(fcinfo, XLOGDIR, false);
619 }
620 
621 /*
622  * Generic function to return the list of files in pgsql_tmp
623  */
624 static Datum
626 {
627  char path[MAXPGPATH];
628 
630  ereport(ERROR,
631  (errcode(ERRCODE_UNDEFINED_OBJECT),
632  errmsg("tablespace with OID %u does not exist",
633  tblspc)));
634 
635  TempTablespacePath(path, tblspc);
636  return pg_ls_dir_files(fcinfo, path, true);
637 }
638 
639 /*
640  * Function to return the list of temporary files in the pg_default tablespace's
641  * pgsql_tmp directory
642  */
643 Datum
645 {
646  return pg_ls_tmpdir(fcinfo, DEFAULTTABLESPACE_OID);
647 }
648 
649 /*
650  * Function to return the list of temporary files in the specified tablespace's
651  * pgsql_tmp directory
652  */
653 Datum
655 {
656  return pg_ls_tmpdir(fcinfo, PG_GETARG_OID(0));
657 }
658 
659 /*
660  * Function to return the list of files in the WAL archive status directory.
661  */
662 Datum
664 {
665  return pg_ls_dir_files(fcinfo, XLOGDIR "/archive_status", true);
666 }
667 
668 /*
669  * Function to return the list of files in the pg_logical/snapshots directory.
670  */
671 Datum
673 {
674  return pg_ls_dir_files(fcinfo, "pg_logical/snapshots", false);
675 }
676 
677 /*
678  * Function to return the list of files in the pg_logical/mappings directory.
679  */
680 Datum
682 {
683  return pg_ls_dir_files(fcinfo, "pg_logical/mappings", false);
684 }
685 
686 /*
687  * Function to return the list of files in the pg_replslot/<replication_slot>
688  * directory.
689  */
690 Datum
692 {
693  text *slotname_t;
694  char path[MAXPGPATH];
695  char *slotname;
696 
697  slotname_t = PG_GETARG_TEXT_PP(0);
698 
699  slotname = text_to_cstring(slotname_t);
700 
701  if (!SearchNamedReplicationSlot(slotname, true))
702  ereport(ERROR,
703  (errcode(ERRCODE_UNDEFINED_OBJECT),
704  errmsg("replication slot \"%s\" does not exist",
705  slotname)));
706 
707  snprintf(path, sizeof(path), "pg_replslot/%s", slotname);
708  return pg_ls_dir_files(fcinfo, path, false);
709 }
bool has_privs_of_role(Oid member, Oid role)
Definition: acl.c:4951
int16 AttrNumber
Definition: attnum.h:21
TimestampTz time_t_to_timestamptz(pg_time_t tm)
Definition: timestamp.c:1726
static Datum values[MAXATTR]
Definition: bootstrap.c:156
#define CStringGetTextDatum(s)
Definition: builtins.h:85
#define PG_BINARY_R
Definition: c.h:1270
#define VARHDRSZ
Definition: c.h:627
size_t Size
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int errhint(const char *fmt,...)
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int errcode(int sqlerrcode)
Definition: elog.c:693
int errmsg(const char *fmt,...)
Definition: elog.c:904
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Definition: execTuples.c:2071
struct dirent * ReadDir(DIR *dir, const char *dirname)
Definition: fd.c:2788
int FreeDir(DIR *dir)
Definition: fd.c:2840
FILE * AllocateFile(const char *name, const char *mode)
Definition: fd.c:2461
int FreeFile(FILE *file)
Definition: fd.c:2660
DIR * AllocateDir(const char *dirname)
Definition: fd.c:2722
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Definition: fd.c:1762
Datum Int64GetDatum(int64 X)
Definition: fmgr.c:1683
#define PG_GETARG_OID(n)
Definition: fmgr.h:275
#define PG_GETARG_TEXT_PP(n)
Definition: fmgr.h:309
#define PG_RETURN_BYTEA_P(x)
Definition: fmgr.h:371
#define PG_ARGISNULL(n)
Definition: fmgr.h:209
#define PG_NARGS()
Definition: fmgr.h:203
#define PG_RETURN_NULL()
Definition: fmgr.h:345
#define PG_GETARG_INT64(n)
Definition: fmgr.h:283
#define PG_RETURN_TEXT_P(x)
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#define PG_GETARG_BOOL(n)
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#define PG_FUNCTION_ARGS
Definition: fmgr.h:193
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Definition: funcapi.c:76
#define HeapTupleGetDatum(tuple)
Definition: funcapi.h:220
#define SRF_SINGLE_USE_EXPECTED
Definition: funcapi.h:291
Datum pg_read_file_off_len(PG_FUNCTION_ARGS)
Definition: genfile.c:362
Datum pg_read_binary_file_all(PG_FUNCTION_ARGS)
Definition: genfile.c:380
Datum pg_ls_logicalsnapdir(PG_FUNCTION_ARGS)
Definition: genfile.c:672
Datum pg_ls_waldir(PG_FUNCTION_ARGS)
Definition: genfile.c:616
Datum pg_ls_replslotdir(PG_FUNCTION_ARGS)
Definition: genfile.c:691
Datum pg_ls_dir(PG_FUNCTION_ARGS)
Definition: genfile.c:474
Datum pg_ls_archive_statusdir(PG_FUNCTION_ARGS)
Definition: genfile.c:663
Datum pg_stat_file(PG_FUNCTION_ARGS)
Definition: genfile.c:389
static Datum pg_ls_tmpdir(FunctionCallInfo fcinfo, Oid tblspc)
Definition: genfile.c:625
static bytea * read_binary_file(const char *filename, int64 seek_offset, int64 bytes_to_read, bool missing_ok)
Definition: genfile.c:103
Datum pg_read_file_v2(PG_FUNCTION_ARGS)
Definition: genfile.c:283
Datum pg_read_file(PG_FUNCTION_ARGS)
Definition: genfile.c:236
static char * convert_and_check_filename(text *arg)
Definition: genfile.c:54
#define MIN_READ_SIZE
Datum pg_read_binary_file_off_len(PG_FUNCTION_ARGS)
Definition: genfile.c:374
Datum pg_ls_dir_1arg(PG_FUNCTION_ARGS)
Definition: genfile.c:534
Datum pg_read_file_all(PG_FUNCTION_ARGS)
Definition: genfile.c:368
Datum pg_ls_tmpdir_noargs(PG_FUNCTION_ARGS)
Definition: genfile.c:644
Datum pg_ls_logdir(PG_FUNCTION_ARGS)
Definition: genfile.c:609
Datum pg_ls_logicalmapdir(PG_FUNCTION_ARGS)
Definition: genfile.c:681
Datum pg_stat_file_1arg(PG_FUNCTION_ARGS)
Definition: genfile.c:465
Datum pg_read_binary_file(PG_FUNCTION_ARGS)
Definition: genfile.c:319
Datum pg_ls_tmpdir_1arg(PG_FUNCTION_ARGS)
Definition: genfile.c:654
static Datum pg_ls_dir_files(FunctionCallInfo fcinfo, const char *dir, bool missing_ok)
Definition: genfile.c:546
static text * read_text_file(const char *filename, int64 seek_offset, int64 bytes_to_read, bool missing_ok)
Definition: genfile.c:211
char * DataDir
Definition: globals.c:66
HeapTuple heap_form_tuple(TupleDesc tupleDescriptor, Datum *values, bool *isnull)
Definition: heaptuple.c:1020
Assert(fmt[strlen(fmt) - 1] !='\n')
bool pg_verifymbstr(const char *mbstr, int len, bool noError)
Definition: mbutils.c:1505
void pfree(void *pointer)
Definition: mcxt.c:1175
void * palloc(Size size)
Definition: mcxt.c:1068
#define MaxAllocSize
Definition: memutils.h:40
Oid GetUserId(void)
Definition: miscinit.c:492
void * arg
#define MAXPGPATH
static char * filename
Definition: pg_dumpall.c:94
static char * buf
Definition: pg_test_fsync.c:67
#define is_absolute_path(filename)
Definition: port.h:89
bool path_is_prefix_of_path(const char *path1, const char *path2)
Definition: path.c:559
bool path_is_relative_and_below_cwd(const char *path)
Definition: path.c:526
void canonicalize_path(char *path)
Definition: path.c:264
#define snprintf
Definition: port.h:225
uintptr_t Datum
Definition: postgres.h:411
#define VARDATA(PTR)
Definition: postgres.h:315
#define ObjectIdGetDatum(X)
Definition: postgres.h:551
#define BoolGetDatum(X)
Definition: postgres.h:446
#define SET_VARSIZE(PTR, len)
Definition: postgres.h:342
#define VARSIZE(PTR)
Definition: postgres.h:316
unsigned int Oid
Definition: postgres_ext.h:31
ReplicationSlot * SearchNamedReplicationSlot(const char *name, bool need_lock)
Definition: slot.c:377
void enlargeStringInfo(StringInfo str, int needed)
Definition: stringinfo.c:283
void initStringInfo(StringInfo str)
Definition: stringinfo.c:59
Definition: dirent.c:26
fmNodePtr resultinfo
Definition: fmgr.h:89
TupleDesc setDesc
Definition: execnodes.h:317
Tuplestorestate * setResult
Definition: execnodes.h:316
Definition: dirent.h:10
__time64_t st_mtime
Definition: win32_port.h:275
__int64 st_size
Definition: win32_port.h:273
unsigned short st_mode
Definition: win32_port.h:268
__time64_t st_atime
Definition: win32_port.h:274
__time64_t st_ctime
Definition: win32_port.h:276
Definition: c.h:622
bool superuser(void)
Definition: superuser.c:46
@ TABLESPACEOID
Definition: syscache.h:101
#define SearchSysCacheExists1(cacheId, key1)
Definition: syscache.h:188
char * Log_directory
Definition: syslogger.c:74
TupleDesc CreateTemplateTupleDesc(int natts)
Definition: tupdesc.c:45
void TupleDescInitEntry(TupleDesc desc, AttrNumber attributeNumber, const char *attributeName, Oid oidtypeid, int32 typmod, int attdim)
Definition: tupdesc.c:583
void tuplestore_putvalues(Tuplestorestate *state, TupleDesc tdesc, Datum *values, bool *isnull)
Definition: tuplestore.c:750
#define TimestampTzGetDatum(X)
Definition: timestamp.h:32
char * text_to_cstring(const text *t)
Definition: varlena.c:221
#define stat
Definition: win32_port.h:283
#define S_ISDIR(m)
Definition: win32_port.h:324
#define S_ISREG(m)
Definition: win32_port.h:327
#define fseeko(stream, offset, origin)
Definition: win32_port.h:215
#define XLOGDIR