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Michael Paquier 5b0b699f74 Refactor output file handling when forking syslogger under EXEC_BACKEND 
A forked logging collector in EXEC_BACKEND builds passes down file
descriptors (or HANDLEs in WIN32) through a command for files to be
reopened (for stderr and csvlog).  Some of its logic was duplicated, and
this commit refactors the code with some wrapper routines for file
reopening after forking and fd grabbing when building the command for
the fork.

While on it, this simplifies a use of "long" in the code, introduced by
ab0ba6e to take care of a warning related to MinGW-W64 when mapping a
intptr_t to a printed value.  "long" is 32-bit long on Windows, and
interoperability of Win32 and Win64 ensures that handles are always
32-bit significant, so we can just use "int" for the same result.  This
also makes the new routines more symmetric.

This change makes easier the introduction of new log destinations in the
logging collector, and this is not the only piece of refactoring
planned.  I have tested this change with EXEC_BACKEND on linux, macos,
and of course MSVC (both Win32 and Win64), but not MinGW so the
buildfarm may have something to say here.

Author: Sehrope Sarkuni, Michael Paquier
Discussion: https://postgr.es/m/CAH7T-aqswBM6JWe4pDehi1uOiufqe06DJWaU5=X7dDLyqUExHg@mail.gmail.com
2021-09-29 10:54:45 +09:00
..
autovacuum.c Revert analyze support for partitioned tables 2021-08-16 17:27:52 -04:00
auxprocess.c pgstat: Bring up pgstat in BaseInit() to fix uninitialized use of pgstat by AV. 2021-08-06 19:05:59 -07:00
bgworker.c Remove support for background workers without BGWORKER_SHMEM_ACCESS. 2021-08-13 05:49:26 -07:00
bgwriter.c Run checkpointer and bgwriter in crash recovery. 2021-08-02 17:32:44 +12:00
checkpointer.c pgstat: split reporting/fetching of bgwriter and checkpointer stats. 2021-08-04 19:16:04 -07:00
fork_process.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
interrupt.c Update copyright for 2021 2021-01-02 13:06:25 -05:00
Makefile process startup: Move AuxiliaryProcessMain into its own file. 2021-08-05 12:12:11 -07:00
pgarch.c Make archiver process handle barrier events. 2021-06-18 17:57:09 +09:00
pgstat.c pgstat: Prepare to use mechanism for truncated rels also for droppped rels. 2021-09-20 14:02:48 -07:00
postmaster.c process startup: Split single user code out of PostgresMain(). 2021-09-17 19:56:47 -07:00
startup.c Move InRecovery and standbyState global vars to xlogutils.c. 2021-07-31 09:50:26 +03:00
syslogger.c Refactor output file handling when forking syslogger under EXEC_BACKEND 2021-09-29 10:54:45 +09:00
walwriter.c Revert "Avoid creating archive status ".ready" files too early" 2021-09-04 12:14:30 -04:00