From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Bruce Momjian <bruce(at)momjian(dot)us> |
Cc: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Michael Beattie <mtbeedee(at)gmail(dot)com>, Magnus Hagander <magnus(at)hagander(dot)net>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: FATAL: bogus data in lock file "postmaster.pid": "" |
Date: | 2012-08-28 20:25:36 |
Message-ID: | 8665.1346185536@sss.pgh.pa.us |
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Bruce Momjian <bruce(at)momjian(dot)us> writes:
> Updated patch attached which just reports the file as empty. I assume
> we don't want the extra text output for pg_ctl like we do for the
> backend.
The backend side of this looks mostly sane to me (but drop the \n,
messages are not supposed to contain those). But the feof test proposed
for pg_ctl is no good: consider a file containing just, say, "-".
fscanf would eat the "-", then hit eof, and this would complain the file
is empty. Possibly checking for ftell(pidf) == 0 would do, though I'm
not sure whether it's portable to assume fscanf would eat a non-numeric
character before complaining.
regards, tom lane
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