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Backpatch-through: 13
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Reported-by: Michael Paquier
Discussion: https://postgr.es/m/ZZKTDPxBBMt3C0J9@paquier.xyz
Backpatch-through: 12
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Backpatch-through: 11
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Backpatch-through: 10
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Backpatch-through: 9.5
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Since at least 2001 we've used putenv() and avoided setenv(), on the
grounds that the latter was unportable and not in POSIX. However,
POSIX added it that same year, and by now the situation has reversed:
setenv() is probably more portable than putenv(), since POSIX now
treats the latter as not being a core function. And setenv() has
cleaner semantics too. So, let's reverse that old policy.
This commit adds a simple src/port/ implementation of setenv() for
any stragglers (we have one in the buildfarm, but I'd not be surprised
if that code is never used in the field). More importantly, extend
win32env.c to also support setenv(). Then, replace usages of putenv()
with setenv(), and get rid of some ad-hoc implementations of setenv()
wannabees.
Also, adjust our src/port/ implementation of unsetenv() to follow the
POSIX spec that it returns an error indicator, rather than returning
void as per the ancient BSD convention. I don't feel a need to make
all the call sites check for errors, but the portability stub ought
to match real-world practice.
Discussion: https://postgr.es/m/2065122.1609212051@sss.pgh.pa.us
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After de8feb1f3a23465b5737e8a8c160e8ca62f61339, some warnings remained
that were only visible when using GCC on Windows. Fix those as well.
Note that the ecpg test source files don't use the full pg_config.h,
so we can't use pg_funcptr_t there but have to do it the long way.
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Backpatch-through: update all files in master, backpatch legal files through 9.4
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Backpatch-through: certain files through 9.4
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Backpatch-through: certain files through 9.3
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This extends to MinGW builds the provision for MSVC-built libraries to
see putenv() effects. Doing so repairs, for example, the handling of
the krb_server_keyfile parameter when linked with MSVC-built MIT
Kerberos. Like the previous commit, no back-patch.
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Until now, the first putenv() call of a given postgres.exe process would
cache the set of loaded CRTs. If a CRT unloaded after that call, the
next putenv() would crash. That risk was largely theoretical, because
the first putenv() precedes all PostgreSQL-initiated module loading.
However, this might explain bad interactions with antivirus and other
software that injects threads asynchronously. If an additional CRT
loaded after the first putenv(), pgwin32_putenv() would not discover it.
That CRT would have all environment changes predating its load, but it
would not receive later PostgreSQL-initiated changes. An additional CRT
loading concurrently with the first putenv() might miss that change in
addition to missing later changes. Fix all those problems. This
removes the cache mechanism from pgwin32_putenv(); the cost, less than
100 μs per backend startup, is negligible.
No resulting misbehavior was known to be user-visible given the core
distribution alone, but one can readily construct an affected extension
module. No back-patch given the lack of complaints and the potential
for behavior changes in non-PostgreSQL code running in the backend.
Christian Ullrich, reviewed by Michael Paquier.
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This has no effect in the most conventional case, where no relevant DLL
uses a debug build. For an example where it does matter, given a debug
build of MIT Kerberos, the krb_server_keyfile parameter usually had no
effect. Since nobody wants a Heisenbug, back-patch to 9.2 (all
supported versions).
Christian Ullrich, reviewed by Michael Paquier.
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In accordance with its own documentation, invoke CloseHandle() only when
directed in the documentation for the function that furnished the
handle. GetModuleHandle() does not so direct. We have been issuing
this call only in the rare event that a CRT DLL contains no "_putenv"
symbol, so lack of bug reports is uninformative. Back-patch to 9.2 (all
supported versions).
Christian Ullrich, reviewed by Michael Paquier.
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Replace use of plain 0 as a null pointer constant. In comments, update
terminology and lessen redundancy. Back-patch to 9.2 (all supported
versions) for the convenience of back-patching the next two commits.
Christian Ullrich and Noah Misch, reviewed (in earlier versions) by
Michael Paquier.
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reported by Christian Ullrich
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Adjust the way we detect the locale. As a result the minumum Windows
version supported by VS2015 and later is Windows Vista. Add some tweaks
to remove new compiler warnings. Remove documentation references to the
now obsolete msysGit.
Michael Paquier, somewhat edited by me, reviewed by Christian Ullrich.
Backpatch to 9.5
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This was missed when VS 2013 support was added.
Michael Paquier
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Backpatch certain files through 9.1
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Backpatch certain files through 9.0
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Update all files in head, and files COPYRIGHT and legal.sgml in all back
branches.
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Backpatch to release 9.2
Brar Piening and Noah Misch, reviewed by Craig Ringer.
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Fully update git head, and update back branches in ./COPYRIGHT and
legal.sgml files.
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MSVCRxx runtime, not just the current + Visual Studio 6 (MSVCRT). Clearly
there can be an almost unlimited number of runtimes loaded at the same
time.
Per report from Hiroshi Inoue
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system and local environments anyway, instead of aborting. (This will
happen in a MSVC build with no or very few external libraries linked in)
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provided by Andrew.
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as this seems to crash on at least some versions of MingW. Our current usage
of this function does not require it, so it should be ok to ignore.
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Also, if linked against other versions than the default MSVCRT library
(for example the MSVC build which links against MSVCRT80), also update
the cache in the default MSVCRT at the same time.
This should fix the issues with setting LC_MESSAGES on the MSVC build.
Original patch from Hiroshi Inoue and Hiroshi Saito, much rewritten
by me.
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