Re: posix ps (was Re: Adding `pgrep' and `pkill' to /usr/bin)

From: Harti Brandt (brandt_at_fokus.fraunhofer.de)
Date: 03/28/04

  • Next message: John-Mark Gurney: "Re: Problem with usb in FreeBSD 4.8....help!!!" 
    Date: Sun, 28 Mar 2004 18:47:18 +0200 (CEST)
To: Stephen McKay <smckay@internode.on.net>

    On Sun, 28 Mar 2004, Stephen McKay wrote:

    SM>On Saturday, 27th March 2004, Garance A Drosihn wrote:
    SM>
    SM>>>$ PERSONALITY=freebsd ps -?
    SM>>
    SM>>Secondly, I personally am not fond of commands which COMPLETELY
    SM>>change their behavior based on environment variables. Different
    SM>>options, different formats, different rules.
    SM>
    SM>Unifying ps on all Unices (including FreeBSD) is an excellent idea, and
    SM>I fully support this.
    SM>
    SM>Using an environment variable (no matter what name is used) to switch
    SM>between radically different personalities is an appalling idea. No script
    SM>can depend on the output of ps thereafter.

    Well, that is just like LANG or LC_ALL. You cannot depend on parsing
    utility output until you set LC_ALL=C, yet I have still to see a script
    that does this.

    If you happen to write a script for BSD syntax just put LC_ALL=C
    PERSONALITY=BSD on top of it.

    SM>If multiple personalities is a desirable trait (and it's not clear that it
    SM>is) then command line switches and aliases are the correct mechanisms to
    SM>use.

    That would require to add that switch to all utility calls in a script
    that have multiple personalities. Thats far from beeing desirable.

    harti
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