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Clean up order in miscinit.c a bit

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The code around InitPostmasterChild() from commit 31c453165b somehow
ended up in the middle of a block of code related to "User ID state".
Move it into its own block instead.
This commit is contained in:
Peter Eisentraut
2020-03-11 13:51:55 +01:00
parent aaa3aeddee
commit 1c91838181
2 changed files with 118 additions and 114 deletions
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220
src/backend/utils/init/miscinit.c
View File

@ -75,6 +75,119 @@ static Latch LocalLatchData;
bool IgnoreSystemIndexes = false;
/* ----------------------------------------------------------------
* common process startup code
* ----------------------------------------------------------------
*/
/*
* Initialize the basic environment for a postmaster child
*
* Should be called as early as possible after the child's startup.
*/
void
InitPostmasterChild(void)
{
IsUnderPostmaster = true; /* we are a postmaster subprocess now */
InitProcessGlobals();
/*
* make sure stderr is in binary mode before anything can possibly be
* written to it, in case it's actually the syslogger pipe, so the pipe
* chunking protocol isn't disturbed. Non-logpipe data gets translated on
* redirection (e.g. via pg_ctl -l) anyway.
*/
#ifdef WIN32
_setmode(fileno(stderr), _O_BINARY);
#endif
/* We don't want the postmaster's proc_exit() handlers */
on_exit_reset();
/* Initialize process-local latch support */
InitializeLatchSupport();
MyLatch = &LocalLatchData;
InitLatch(MyLatch);
/*
* If possible, make this process a group leader, so that the postmaster
* can signal any child processes too. Not all processes will have
* children, but for consistency we make all postmaster child processes do
* this.
*/
#ifdef HAVE_SETSID
if (setsid() < 0)
elog(FATAL, "setsid() failed: %m");
#endif
/* Request a signal if the postmaster dies, if possible. */
PostmasterDeathSignalInit();
}
/*
* Initialize the basic environment for a standalone process.
*
* argv0 has to be suitable to find the program's executable.
*/
void
InitStandaloneProcess(const char *argv0)
{
Assert(!IsPostmasterEnvironment);
InitProcessGlobals();
/* Initialize process-local latch support */
InitializeLatchSupport();
MyLatch = &LocalLatchData;
InitLatch(MyLatch);
/* Compute paths, no postmaster to inherit from */
if (my_exec_path[0] == '\0')
{
if (find_my_exec(argv0, my_exec_path) < 0)
elog(FATAL, "%s: could not locate my own executable path",
argv0);
}
if (pkglib_path[0] == '\0')
get_pkglib_path(my_exec_path, pkglib_path);
}
void
SwitchToSharedLatch(void)
{
Assert(MyLatch == &LocalLatchData);
Assert(MyProc != NULL);
MyLatch = &MyProc->procLatch;
if (FeBeWaitSet)
ModifyWaitEvent(FeBeWaitSet, 1, WL_LATCH_SET, MyLatch);
/*
* Set the shared latch as the local one might have been set. This
* shouldn't normally be necessary as code is supposed to check the
* condition before waiting for the latch, but a bit care can't hurt.
*/
SetLatch(MyLatch);
}
void
SwitchBackToLocalLatch(void)
{
Assert(MyLatch != &LocalLatchData);
Assert(MyProc != NULL && MyLatch == &MyProc->procLatch);
MyLatch = &LocalLatchData;
if (FeBeWaitSet)
ModifyWaitEvent(FeBeWaitSet, 1, WL_LATCH_SET, MyLatch);
SetLatch(MyLatch);
}
/* ----------------------------------------------------------------
* database path / name support stuff
* ----------------------------------------------------------------
@ -262,113 +375,6 @@ static int SecurityRestrictionContext = 0;
/* We also remember if a SET ROLE is currently active */
static bool SetRoleIsActive = false;
/*
* Initialize the basic environment for a postmaster child
*
* Should be called as early as possible after the child's startup.
*/
void
InitPostmasterChild(void)
{
IsUnderPostmaster = true; /* we are a postmaster subprocess now */
InitProcessGlobals();
/*
* make sure stderr is in binary mode before anything can possibly be
* written to it, in case it's actually the syslogger pipe, so the pipe
* chunking protocol isn't disturbed. Non-logpipe data gets translated on
* redirection (e.g. via pg_ctl -l) anyway.
*/
#ifdef WIN32
_setmode(fileno(stderr), _O_BINARY);
#endif
/* We don't want the postmaster's proc_exit() handlers */
on_exit_reset();
/* Initialize process-local latch support */
InitializeLatchSupport();
MyLatch = &LocalLatchData;
InitLatch(MyLatch);
/*
* If possible, make this process a group leader, so that the postmaster
* can signal any child processes too. Not all processes will have
* children, but for consistency we make all postmaster child processes do
* this.
*/
#ifdef HAVE_SETSID
if (setsid() < 0)
elog(FATAL, "setsid() failed: %m");
#endif
/* Request a signal if the postmaster dies, if possible. */
PostmasterDeathSignalInit();
}
/*
* Initialize the basic environment for a standalone process.
*
* argv0 has to be suitable to find the program's executable.
*/
void
InitStandaloneProcess(const char *argv0)
{
Assert(!IsPostmasterEnvironment);
InitProcessGlobals();
/* Initialize process-local latch support */
InitializeLatchSupport();
MyLatch = &LocalLatchData;
InitLatch(MyLatch);
/* Compute paths, no postmaster to inherit from */
if (my_exec_path[0] == '\0')
{
if (find_my_exec(argv0, my_exec_path) < 0)
elog(FATAL, "%s: could not locate my own executable path",
argv0);
}
if (pkglib_path[0] == '\0')
get_pkglib_path(my_exec_path, pkglib_path);
}
void
SwitchToSharedLatch(void)
{
Assert(MyLatch == &LocalLatchData);
Assert(MyProc != NULL);
MyLatch = &MyProc->procLatch;
if (FeBeWaitSet)
ModifyWaitEvent(FeBeWaitSet, 1, WL_LATCH_SET, MyLatch);
/*
* Set the shared latch as the local one might have been set. This
* shouldn't normally be necessary as code is supposed to check the
* condition before waiting for the latch, but a bit care can't hurt.
*/
SetLatch(MyLatch);
}
void
SwitchBackToLocalLatch(void)
{
Assert(MyLatch != &LocalLatchData);
Assert(MyProc != NULL && MyLatch == &MyProc->procLatch);
MyLatch = &LocalLatchData;
if (FeBeWaitSet)
ModifyWaitEvent(FeBeWaitSet, 1, WL_LATCH_SET, MyLatch);
SetLatch(MyLatch);
}
/*
* GetUserId - get the current effective user ID.
*

12
src/include/miscadmin.h
View File

@ -303,8 +303,13 @@ extern char *DatabasePath;
/* now in utils/init/miscinit.c */
extern void InitPostmasterChild(void);
extern void InitStandaloneProcess(const char *argv0);
extern void SwitchToSharedLatch(void);
extern void SwitchBackToLocalLatch(void);
extern void SetDatabasePath(const char *path);
extern void checkDataDir(void);
extern void SetDataDir(const char *dir);
extern void ChangeToDataDir(void);
extern char *GetUserNameFromId(Oid roleid, bool noerr);
extern Oid GetUserId(void);
@ -324,13 +329,6 @@ extern void SetSessionAuthorization(Oid userid, bool is_superuser);
extern Oid GetCurrentRoleId(void);
extern void SetCurrentRoleId(Oid roleid, bool is_superuser);
extern void checkDataDir(void);
extern void SetDataDir(const char *dir);
extern void ChangeToDataDir(void);
extern void SwitchToSharedLatch(void);
extern void SwitchBackToLocalLatch(void);
/* in utils/misc/superuser.c */
extern bool superuser(void); /* current user is superuser */
extern bool superuser_arg(Oid roleid); /* given user is superuser */