pgsql: Fix WaitLatchOrSocket to handle EOF on socket correctly.

Fix WaitLatchOrSocket to handle EOF on socket correctly.

When using poll(), EOF on a socket is reported with the POLLHUP not
POLLIN flag (at least on Linux). WaitLatchOrSocket failed to check
this bit, causing it to go into a busy-wait loop if EOF occurs.
We earlier fixed the same mistake in the test for the state of the
postmaster_alive socket, but missed it for the caller-supplied socket.
Fortunately, this error is new in 9.2, since 9.1 only had a select()
based code path not a poll() based one.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/31ad6553646c81f3ce8fccf8aef1a1134a7864c7

Modified Files
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src/backend/port/unix_latch.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)