1/*-------------------------------------------------------------------------
2 *
3 * fetch.c
4 * Functions for fetching files from a local or remote data dir
5 *
6 * This file forms an abstraction of getting files from the "source".
7 * There are two implementations of this interface: one for copying files
8 * from a data directory via normal filesystem operations (copy_fetch.c),
9 * and another for fetching files from a remote server via a libpq
10 * connection (libpq_fetch.c)
11 *
12 *
13 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
14 *
15 *-------------------------------------------------------------------------
16 */
17#include "postgres_fe.h"
18
19#include <sys/stat.h>
20#include <unistd.h>
21
22#include "pg_rewind.h"
23#include "fetch.h"
24#include "file_ops.h"
25#include "filemap.h"
26
27void
28fetchSourceFileList(void)
29{
30 if (datadir_source)
31 traverse_datadir(datadir_source, &process_source_file);
32 else
33 libpqProcessFileList();
34}
35
36/*
37 * Fetch all relation data files that are marked in the given data page map.
38 */
39void
40executeFileMap(void)
41{
42 if (datadir_source)
43 copy_executeFileMap(filemap);
44 else
45 libpq_executeFileMap(filemap);
46}
47
48/*
49 * Fetch a single file into a malloc'd buffer. The file size is returned
50 * in *filesize. The returned buffer is always zero-terminated, which is
51 * handy for text files.
52 */
53char *
54fetchFile(const char *filename, size_t *filesize)
55{
56 if (datadir_source)
57 return slurpFile(datadir_source, filename, filesize);
58 else
59 return libpqGetFile(filename, filesize);
60}
61