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Re: Re: [PORTS] pgmonitor and Solaris

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Peter Eisentraut <peter_e(at)gmx(dot)net>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Mathijs Brands <mathijs(at)ilse(dot)nl>, Larry Rosenman <ler(at)lerctr(dot)org>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Re: [PORTS] pgmonitor and Solaris
Date: 2001-03-29 17:02:32
Message-ID: 200103291702.MAA13902@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-adminpgsql-hackerspgsql-ports
> Tom Lane writes:
> 
> > Mathijs Brands <mathijs(at)ilse(dot)nl> writes:
> > > mathijs    297  0.1  0.2 6120 3352 pts/1    S 01:59:18  0:00 /opt/pgsql/bin/./postgres mathijs localhost template1 idle
> >
> > The interesting point about this is that the 7.0.3-on-2.7 installation
> > *is* managing to change its PS display.  So either Solaris 2.8
> > retrogressed (different predefined symbols maybe?), or we broke the code
> > since 7.0.3.
> 
> I think I broke it.
> 
> The deal on Solaris is this:  There's SysV-style ps at /usr/bin/ps, and
> there's BSD-style ps at /usr/ucb/ps.  The most obvious differences are the
> different argument style and the different output format. In true BSD
> style, the /usr/ucb/ps display can be changed by assigning argv[x] =
> "whatever".  In true SysV style, the /usr/bin/ps display can (presumably)
> be changed with strcpy(argv[0], "whatever").
> 
> The old (pre-7.1) code only worked for BSD and had an exception case for
> Linux.  The new code is mostly adopted from Sendmail.  So in pre-7.1 you
> could get /usr/ucb/ps to work, while Sendmail apparently tried to get the
> SysV-style ps to work -- and failed(?).  (This is generally the right
> direction, because the /usr/ucb stuff is obsolescent on Solaris, only for
> compatibility with SunOS 4.)
> 
> The consequence should be:
> 
> 1. check if sendmail works with /usr/bin/ps
> 
> 2. a) if yes, figure out what got lost in PostgreSQL
> 
> 2. b) if no, make the Solaris case in ps_status.c use the BSD approach

[ I had tried to move this discussion to ports, but hackers is OK too.]

Well, this is very interesting.  I am glad to hear you based the current
ps_status code on sendmail, which I think is the perfect way to go.  

I seem to remember the Solaris manual page stating it doesn't update the
ps display, but I may be mixing that up with something else.  I agree
/usr/bin/ps is the better option, if we can get it working.  Most people
will not remember to use /usr/ucb/ps.

I just uploaded a 0.34 version that allows the 'ps' command to be
customized by editing the script.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026

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