PostgreSQL的postmaster.c 中，PostmasterMain函数中，和ListenSocket数组相关的代码大致如下
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/*
* Postmaster main entry point
*/
int
PostmasterMain(int argc, char *argv[])
{
……
/*
* Establish input sockets.
*/
for (i = 0; i < MAXLISTEN; i++)
ListenSocket[i] = PGINVALID_SOCKET;
if (ListenAddresses)
{
……
foreach(l, elemlist)
{
char *curhost = (char *) lfirst(l);
if (strcmp(curhost, "*") == 0)
status = StreamServerPort(AF_UNSPEC, NULL,
(unsigned short) PostPortNumber,
UnixSocketDir,
ListenSocket, MAXLISTEN);
else
status = StreamServerPort(AF_UNSPEC, curhost,
(unsigned short) PostPortNumber,
UnixSocketDir,
ListenSocket, MAXLISTEN);
if (status == STATUS_OK)
success++;
else
ereport(WARNING,
(errmsg("could not create listen socket for \"%s\"",
curhost)));
}
if (!success && list_length(elemlist))
ereport(FATAL,
(errmsg("could not create any TCP/IP sockets")));
list_free(elemlist);
pfree(rawstring);
}
……
/*
* check that we have some socket to listen on
*/
if (ListenSocket[0] == PGINVALID_SOCKET)
ereport(FATAL,
(errmsg("no socket created for listening")));
……
status = ServerLoop();
/*
* ServerLoop probably shouldn't ever return, but if it does, close down.
*/
ExitPostmaster(status != STATUS_OK);
return 0; /* not reached */
}
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本文转自健哥的数据花园博客园博客，原文链接：http://www.cnblogs.com/gaojian/archive/2012/07/20/2600532.html，如需转载请自行联系原作者
