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Michael Paquier a923e21631 Fix detection of unseekable files for fseek() and ftello() with MSVC ... Calling fseek() or ftello() on a handle to a non-seeking device such as a pipe or a communications device is not supported. Unfortunately, MSVC's flavor of these routines, _fseeki64() and _ftelli64(), do not return an error when given a pipe as handle. Some of the logic of pg_dump and restore relies on these routines to check if a handle is seekable, causing failures when passing the contents of pg_dump to pg_restore through a pipe, for example. This commit introduces wrappers for fseeko() and ftello() on MSVC so as any callers are able to properly detect the cases of non-seekable handles. This relies mainly on GetFileType(), sharing a bit of code with the MSVC port for fstat(). The code in charge of getting a file type is refactored into a new file called win32common.c, shared by win32stat.c and the new win32fseek.c. It includes the MSVC ports for fseeko() and ftello(). Like 765f5df, this is backpatched down to 14, where the fstat() implementation for MSVC is able to understand about files larger than 4GB in size. Using a TAP test for that is proving to be tricky as IPC::Run handles the pipes by itself, still I have been able to check the fix manually. Reported-by: Daniel Watzinger Author: Juan José Santamaría Flecha, Michael Paquier Discussion: https://postgr.es/m/CAC+AXB26a4EmxM2suXxPpJaGrqAdxracd7hskLg-zxtPB50h7A@mail.gmail.com Backpatch-through: 14		2 years ago
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backend	Refine the guidelines for rmgrdesc authors.	2 years ago
bin	Introduce PG_IO_ALIGN_SIZE and align all I/O buffers.	2 years ago
common	Introduce PG_IO_ALIGN_SIZE and align all I/O buffers.	2 years ago
fe_utils	Revert refactoring of restore command code to shell_restore.c	3 years ago
include	Fix detection of unseekable files for fseek() and ftello() with MSVC	2 years ago
interfaces	Revert "Add support for Kerberos credential delegation"	2 years ago
makefiles	meson: Make auto the default of the ssl option	3 years ago
pl	Add a way to get the current function's OID in pl/pgsql.	2 years ago
port	Fix detection of unseekable files for fseek() and ftello() with MSVC	2 years ago
template	Use unnamed POSIX semaphores on Cygwin.	3 years ago
test	035_standby_logical_decoding: Add missing waits for replication	2 years ago
timezone	Fix outdated references to guc.c	3 years ago
tools	Fix detection of unseekable files for fseek() and ftello() with MSVC	2 years ago
tutorial	Remove useless casts to (void *) in arguments of some system functions	3 years ago
.gitignore	…
DEVELOPERS	…
Makefile	Integrate pg_bsd_indent into our build/test infrastructure.	3 years ago
Makefile.global.in	pg_regress: Emit TAP compliant output	2 years ago
Makefile.shlib	…
meson.build	Integrate pg_bsd_indent into our build/test infrastructure.	3 years ago
nls-global.mk	…