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Fix off_t overflow in pg_basebackup on Windows.

Browse Source 
walmethods.c used off_t to navigate around a pg_wal.tar file that could
exceed 2GB, which doesn't work on Windows and would fail with misleading
errors.  Use pgoff_t instead.

Back-patch to all supported branches.

Author: Davinder Singh <davinder.singh@enterprisedb.com>
Reported-by: Jakub Wartak <jakub.wartak@enterprisedb.com>
Discussion: https://postgr.es/m/CAKZiRmyM4YnokK6Oenw5JKwAQ3rhP0YTz2T-tiw5dAQjGRXE3Q%40mail.gmail.com
This commit is contained in:
Thomas Munro
2025-01-09 13:17:36 +13:00
parent 70a7a37610
commit 6b6901a26f
3 changed files with 7 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/bin/pg_basebackup/receivelog.c
View File

@ -191,7 +191,7 @@ static bool
close_walfile(StreamCtl *stream, XLogRecPtr pos)
{
char *fn;
off_t currpos;
pgoff_t currpos;
int r;
if (walfile == NULL)

10
src/bin/pg_basebackup/walmethods.c
View File

@ -63,7 +63,7 @@ static DirectoryMethodData *dir_data = NULL;
typedef struct DirectoryMethodFile
{
int fd;
off_t currpos;
pgoff_t currpos;
char *pathname;
char *fullpath;
char *temp_suffix;
@ -370,7 +370,7 @@ dir_write(Walfile f, const void *buf, size_t count)
return r;
}
static off_t
static pgoff_t
dir_get_current_pos(Walfile f)
{
Assert(f != NULL);
@ -666,8 +666,8 @@ FreeWalDirectoryMethod(void)
typedef struct TarMethodFile
{
off_t ofs_start; /* Where does the *header* for this file start */
off_t currpos;
pgoff_t ofs_start; /* Where does the *header* for this file start */
pgoff_t currpos;
char header[TAR_BLOCK_SIZE];
char *pathname;
size_t pad_to_size;
@ -1005,7 +1005,7 @@ tar_compression_algorithm(void)
return tar_data->compression_algorithm;
}
static off_t
static pgoff_t
tar_get_current_pos(Walfile f)
{
Assert(f != NULL);

2
src/bin/pg_basebackup/walmethods.h
View File

@ -69,7 +69,7 @@ struct WalWriteMethod
ssize_t (*write) (Walfile f, const void *buf, size_t count);
/* Return the current position in a file or -1 on error */
off_t (*get_current_pos) (Walfile f);
pgoff_t (*get_current_pos) (Walfile f);
/*
* fsync the contents of the specified file. Returns 0 on success.