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Typedefs | Functions
file_ops.h File Reference
#include "filemap.h"
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Typedefs

typedef void(*  process_file_callback_t) (const char *path, file_type_t type, size_t size, const char *link_target)
 

Functions

void  open_target_file (const char *path, bool trunc)
 
void  write_target_range (char *buf, off_t begin, size_t size)
 
void  close_target_file (void)
 
void  remove_target_file (const char *path, bool missing_ok)
 
void  truncate_target_file (const char *path, off_t newsize)
 
void  create_target (file_entry_t *entry)
 
void  remove_target (file_entry_t *entry)
 
void  sync_target_dir (void)
 
char *  slurpFile (const char *datadir, const char *path, size_t *filesize)
 
void  traverse_datadir (const char *datadir, process_file_callback_t callback)
 

Typedef Documentation

◆ process_file_callback_t

typedef void(* process_file_callback_t) (const char *path, file_type_t type, size_t size, const char *link_target)

Definition at line 26 of file file_ops.h.

Function Documentation

◆ close_target_file()

void close_target_file ( void  )

Definition at line 75 of file file_ops.c.

76{
77 if (dstfd == -1)
78 return;
79
80 if (close(dstfd) != 0)
81 pg_fatal("could not close target file \"%s\": %m",
82 dstpath);
83
84 dstfd = -1;
85}
static char dstpath[MAXPGPATH]
Definition: file_ops.c:32
static int dstfd
Definition: file_ops.c:31
#define close(a)
Definition: win32.h:12
#define pg_fatal(...)

References close, dstfd, dstpath, and pg_fatal.

Referenced by createBackupLabel(), open_target_file(), and perform_rewind().

◆ create_target()

void create_target ( file_entry_t *  entry )

Definition at line 156 of file file_ops.c.

157{
159 Assert(!entry->target_exists);
160
161 switch (entry->source_type)
162 {
164 create_target_dir(entry->path);
165 break;
166
169 break;
170
172 /* can't happen. Regular files are created with open_target_file. */
173 pg_fatal("invalid action (CREATE) for regular file");
174 break;
175
177 pg_fatal("undefined file type for \"%s\"", entry->path);
178 break;
179 }
180}
static void create_target_symlink(const char *path, const char *link)
Definition: file_ops.c:257
static void create_target_dir(const char *path)
Definition: file_ops.c:229
@ FILE_ACTION_CREATE
Definition: filemap.h:20
@ FILE_TYPE_UNDEFINED
Definition: filemap.h:32
@ FILE_TYPE_REGULAR
Definition: filemap.h:34
@ FILE_TYPE_SYMLINK
Definition: filemap.h:36
@ FILE_TYPE_DIRECTORY
Definition: filemap.h:35
Assert(PointerIsAligned(start, uint64))
const char * path
Definition: filemap.h:53
bool target_exists
Definition: filemap.h:59
char * source_link_target
Definition: filemap.h:76
file_type_t source_type
Definition: filemap.h:74
file_action_t action
Definition: filemap.h:81

References file_entry_t::action, Assert(), create_target_dir(), create_target_symlink(), FILE_ACTION_CREATE, FILE_TYPE_DIRECTORY, FILE_TYPE_REGULAR, FILE_TYPE_SYMLINK, FILE_TYPE_UNDEFINED, file_entry_t::path, pg_fatal, file_entry_t::source_link_target, file_entry_t::source_type, and file_entry_t::target_exists.

Referenced by perform_rewind().

◆ open_target_file()

void open_target_file ( const char *  path,
bool  trunc 
)

Definition at line 47 of file file_ops.c.

48{
49 int mode;
50
51 if (dry_run)
52 return;
53
54 if (dstfd != -1 && !trunc &&
55 strcmp(path, &dstpath[strlen(datadir_target) + 1]) == 0)
56 return; /* already open */
57
59
60 snprintf(dstpath, sizeof(dstpath), "%s/%s", datadir_target, path);
61
62 mode = O_WRONLY | O_CREAT | PG_BINARY;
63 if (trunc)
64 mode |= O_TRUNC;
66 if (dstfd < 0)
67 pg_fatal("could not open target file \"%s\": %m",
68 dstpath);
69}
#define PG_BINARY
Definition: c.h:1272
void close_target_file(void)
Definition: file_ops.c:75
int pg_file_create_mode
Definition: file_perm.c:19
static PgChecksumMode mode
Definition: pg_checksums.c:55
static bool dry_run
char * datadir_target
Definition: pg_rewind.c:67
#define snprintf
Definition: port.h:239

References close_target_file(), datadir_target, dry_run, dstfd, dstpath, mode, PG_BINARY, pg_fatal, pg_file_create_mode, and snprintf.

Referenced by createBackupLabel(), libpq_queue_fetch_file(), local_queue_fetch_file(), local_queue_fetch_range(), and process_queued_fetch_requests().

◆ remove_target()

void remove_target ( file_entry_t *  entry )

Definition at line 130 of file file_ops.c.

131{
133 Assert(entry->target_exists);
134
135 switch (entry->target_type)
136 {
138 remove_target_dir(entry->path);
139 break;
140
142 remove_target_file(entry->path, false);
143 break;
144
147 break;
148
150 pg_fatal("undefined file type for \"%s\"", entry->path);
151 break;
152 }
153}
void remove_target_file(const char *path, bool missing_ok)
Definition: file_ops.c:187
static void remove_target_dir(const char *path)
Definition: file_ops.c:243
static void remove_target_symlink(const char *path)
Definition: file_ops.c:271
@ FILE_ACTION_REMOVE
Definition: filemap.h:27
file_type_t target_type
Definition: filemap.h:60

References file_entry_t::action, Assert(), FILE_ACTION_REMOVE, FILE_TYPE_DIRECTORY, FILE_TYPE_REGULAR, FILE_TYPE_SYMLINK, FILE_TYPE_UNDEFINED, file_entry_t::path, pg_fatal, remove_target_dir(), remove_target_file(), remove_target_symlink(), file_entry_t::target_exists, and file_entry_t::target_type.

Referenced by perform_rewind().

◆ remove_target_file()

void remove_target_file ( const char *  path,
bool  missing_ok 
)

Definition at line 187 of file file_ops.c.

188{
189 char dstpath[MAXPGPATH];
190
191 if (dry_run)
192 return;
193
194 snprintf(dstpath, sizeof(dstpath), "%s/%s", datadir_target, path);
195 if (unlink(dstpath) != 0)
196 {
197 if (errno == ENOENT && missing_ok)
198 return;
199
200 pg_fatal("could not remove file \"%s\": %m",
201 dstpath);
202 }
203}
#define MAXPGPATH

References datadir_target, dry_run, dstpath, MAXPGPATH, pg_fatal, and snprintf.

Referenced by process_queued_fetch_requests(), and remove_target().

◆ slurpFile()

char * slurpFile ( const char *  datadir,
const char *  path,
size_t *  filesize 
)

Definition at line 314 of file file_ops.c.

315{
316 int fd;
317 char *buffer;
318 struct stat statbuf;
319 char fullpath[MAXPGPATH];
320 int len;
321 int r;
322
323 snprintf(fullpath, sizeof(fullpath), "%s/%s", datadir, path);
324
325 if ((fd = open(fullpath, O_RDONLY | PG_BINARY, 0)) == -1)
326 pg_fatal("could not open file \"%s\" for reading: %m",
327 fullpath);
328
329 if (fstat(fd, &statbuf) < 0)
330 pg_fatal("could not open file \"%s\" for reading: %m",
331 fullpath);
332
333 len = statbuf.st_size;
334
335 buffer = pg_malloc(len + 1);
336
337 r = read(fd, buffer, len);
338 if (r != len)
339 {
340 if (r < 0)
341 pg_fatal("could not read file \"%s\": %m",
342 fullpath);
343 else
344 pg_fatal("could not read file \"%s\": read %d of %zu",
345 fullpath, r, (Size) len);
346 }
347 close(fd);
348
349 /* Zero-terminate the buffer. */
350 buffer[len] = '0円';
351
352 if (filesize)
353 *filesize = len;
354 return buffer;
355}
size_t Size
Definition: c.h:610
void * pg_malloc(size_t size)
Definition: fe_memutils.c:47
#define read(a, b, c)
Definition: win32.h:13
const void size_t len
char * datadir
static int fd(const char *x, int i)
Definition: preproc-init.c:105
Definition: win32_port.h:255
#define fstat
Definition: win32_port.h:273

References close, datadir, fd(), fstat, len, MAXPGPATH, PG_BINARY, pg_fatal, pg_malloc(), read, snprintf, and stat::st_size.

Referenced by getTimelineHistory(), local_fetch_file(), and main().

◆ sync_target_dir()

void sync_target_dir ( void  )

Definition at line 294 of file file_ops.c.

295{
296 if (!do_sync || dry_run)
297 return;
298
299 sync_pgdata(datadir_target, PG_VERSION_NUM, sync_method, true);
300}
static bool do_sync
Definition: initdb.c:164
static DataDirSyncMethod sync_method
Definition: initdb.c:170

References datadir_target, do_sync, dry_run, and sync_method.

Referenced by main().

◆ traverse_datadir()

void traverse_datadir ( const char *  datadir,
process_file_callback_t  callback 
)

Definition at line 362 of file file_ops.c.

363{
365}
static void recurse_dir(const char *datadir, const char *parentpath, process_file_callback_t callback)
Definition: file_ops.c:374
static void callback(struct sockaddr *addr, struct sockaddr *mask, void *unused)
Definition: test_ifaddrs.c:46

References callback(), datadir, and recurse_dir().

Referenced by local_traverse_files(), and main().

◆ truncate_target_file()

void truncate_target_file ( const char *  path,
off_t  newsize 
)

Definition at line 206 of file file_ops.c.

207{
208 char dstpath[MAXPGPATH];
209 int fd;
210
211 if (dry_run)
212 return;
213
214 snprintf(dstpath, sizeof(dstpath), "%s/%s", datadir_target, path);
215
216 fd = open(dstpath, O_WRONLY, pg_file_create_mode);
217 if (fd < 0)
218 pg_fatal("could not open file \"%s\" for truncation: %m",
219 dstpath);
220
221 if (ftruncate(fd, newsize) != 0)
222 pg_fatal("could not truncate file \"%s\" to %u: %m",
223 dstpath, (unsigned int) newsize);
224
225 close(fd);
226}

References close, datadir_target, dry_run, dstpath, fd(), MAXPGPATH, pg_fatal, pg_file_create_mode, and snprintf.

Referenced by perform_rewind().

◆ write_target_range()

void write_target_range ( char *  buf,
off_t  begin,
size_t  size 
)

Definition at line 88 of file file_ops.c.

89{
90 size_t writeleft;
91 char *p;
92
93 /* update progress report */
94 fetch_done += size;
95 progress_report(false);
96
97 if (dry_run)
98 return;
99
100 if (lseek(dstfd, begin, SEEK_SET) == -1)
101 pg_fatal("could not seek in target file \"%s\": %m",
102 dstpath);
103
104 writeleft = size;
105 p = buf;
106 while (writeleft > 0)
107 {
108 ssize_t writelen;
109
110 errno = 0;
111 writelen = write(dstfd, p, writeleft);
112 if (writelen < 0)
113 {
114 /* if write didn't set errno, assume problem is no disk space */
115 if (errno == 0)
116 errno = ENOSPC;
117 pg_fatal("could not write file \"%s\": %m",
118 dstpath);
119 }
120
121 p += writelen;
122 writeleft -= writelen;
123 }
124
125 /* keep the file open, in case we need to copy more blocks in it */
126}
#define write(a, b, c)
Definition: win32.h:14
static void progress_report(uint64 relations_total, uint64 relations_checked, uint64 relpages_total, uint64 relpages_checked, const char *datname, bool force, bool finished)
Definition: pg_amcheck.c:1244
uint64 fetch_done
Definition: pg_rewind.c:86
static char * buf
Definition: pg_test_fsync.c:72

References buf, dry_run, dstfd, dstpath, fetch_done, pg_fatal, progress_report(), and write.

Referenced by createBackupLabel(), local_queue_fetch_file(), local_queue_fetch_range(), and process_queued_fetch_requests().

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