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Register atexit hook only once in pg_upgrade.

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start_postmaster() registered stop_postmaster_atexit as an atexit(3)
callback each time through, although the obvious intention was to do
so only once per program run.  The extra registrations were harmless,
so long as we didn't exceed ATEXIT_MAX, but still it's a bug.

Artur Zakirov, with bikeshedding by Kyotaro Horiguchi and me

Discussion: <d279e817-02b5-caa6-215f-cfb05dce109a@postgrespro.ru>
This commit is contained in:
Tom Lane
2016-07-28 11:39:11 -04:00
parent 5e50a6718a
commit 737f25cfed
1 changed files with 2 additions and 1 deletions
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3
contrib/pg_upgrade/server.c
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@ -175,10 +175,11 @@ start_postmaster(ClusterInfo *cluster)
{
char cmd[MAXPGPATH * 4 + 1000];
PGconn *conn;
bool exit_hook_registered = false;
bool pg_ctl_return = false;
char socket_string[MAXPGPATH + 200];
static bool exit_hook_registered = false;
if (!exit_hook_registered)
{
atexit(stop_postmaster_atexit);