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From: Bruce Momjian <bruce@momjian.us>
To: Michael Paquier <michael.paquier@gmail.com>
Cc: PostgreSQL-documentation <pgsql-docs@postgresql.org>
Subject: Re: pg_xlogdump -p option correction
Date: Mon, 9 Jan 2017 14:32:23 -0500
Message-ID: <20170109193223.GA19680@momjian.us> (raw)
In-Reply-To: <CAB7nPqRxDcgzuw3GMm2ys1wH+emPvN7fF5h=ND04Y0hu+ginbw@mail.gmail.com>
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	<20170107162059.GE3164@momjian.us>
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On Sun, Jan  8, 2017 at 03:27:59PM +0900, Michael Paquier wrote:
> >> +        subdirectory of both the current directory and the
> >> +        <envar>PGDATA</envar> directory.
> >> This could say "of both the current directory and *then* the PGDATA
> >> directory" to outline the order of the actions taken by the check
> >> routine. Just my 2c on the matter.
> >
> > Ah, I see your point.  I ended up rewording the text to be more explicit
> > about the supplied argument and "searching".  Updated patch attached.
> 
> -        Directory in which to find log segment files.  The default is to search
> -        for them in the <literal>pg_wal</literal> subdirectory of the current
> -        directory.
> +        Specifies a directory in which to find log segment files.
> +        In addition, searches are performed in the current directory,
> +        and the <literal>pg_wal</literal> subdirectory of both the current
> +        directory and the <envar>PGDATA</envar> directory.
> Hm. This still misses the point that the lookup at PGDATA is done only
> if no directory is defined. What do you think about the patch attached
> that lists the five possible patterns: 2 for the case where a
> directory is defined, and 3 for the default case.

Understood.  Here is an updated patch which incorporates your
suggestions.

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

+ As you are, so once was I.  As I am, so you will be. +
+                      Ancient Roman grave inscription +

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Attachments:

xlogdump.diff (text/x-diff, 2.7K) download diff --git a/doc/src/sgml/ref/pg_xlogdump.sgml b/doc/src/sgml/ref/pg_xlogdump.sgml new file mode 100644 index cfb6d87..078b08e *** a/doc/src/sgml/ref/pg_xlogdump.sgml --- b/doc/src/sgml/ref/pg_xlogdump.sgml *************** PostgreSQL documentation *** 117,125 **** <term><option>--path=<replaceable>path</replaceable></option></term> <listitem> <para> ! Directory in which to find log segment files. The default is to search ! for them in the <literal>pg_wal</literal> subdirectory of the current ! directory. </para> </listitem> </varlistentry> --- 117,128 ---- <term><option>--path=<replaceable>path</replaceable></option></term> <listitem> <para> ! Specifies a directory to search for log segment files or a ! directory with a <literal>pg_wal</literal> subdirectory that ! contains such files. The default is to search in the current ! directory, the <literal>pg_wal</literal> subdirectory of the ! current directory, and the <literal>pg_wal</literal> subdirectory ! of <envar>PGDATA</envar>. </para> </listitem> </varlistentry> diff --git a/src/bin/pg_xlogdump/pg_xlogdump.c b/src/bin/pg_xlogdump/pg_xlogdump.c new file mode 100644 index 0ad441e..8bfa827 *** a/src/bin/pg_xlogdump/pg_xlogdump.c --- b/src/bin/pg_xlogdump/pg_xlogdump.c *************** usage(void) *** 680,686 **** printf(_(" -f, --follow keep retrying after reaching end of WAL\n")); printf(_(" -n, --limit=N number of records to display\n")); printf(_(" -p, --path=PATH directory in which to find log segment files\n" ! " (default: ./pg_wal)\n")); printf(_(" -r, --rmgr=RMGR only show records generated by resource manager RMGR\n" " use --rmgr=list to list valid resource manager names\n")); printf(_(" -s, --start=RECPTR start reading at log position RECPTR\n")); --- 680,687 ---- printf(_(" -f, --follow keep retrying after reaching end of WAL\n")); printf(_(" -n, --limit=N number of records to display\n")); printf(_(" -p, --path=PATH directory in which to find log segment files\n" ! printf(_(" or a directory with a ./pg_wal that contains such files\n" ! " (default: current directory, ./pg_wal, PGDATA/pg_wal)\n")); printf(_(" -r, --rmgr=RMGR only show records generated by resource manager RMGR\n" " use --rmgr=list to list valid resource manager names\n")); printf(_(" -s, --start=RECPTR start reading at log position RECPTR\n"));

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  Cc: bruce@momjian.us, michael.paquier@gmail.com
  Subject: Re: pg_xlogdump -p option correction
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