Subject: Re: sysv ps(1) implementation [was: ps(1) sysv silliness]
To: Simon Burge <firstname.lastname@example.org>
From: Todd Vierling <email@example.com>
Date: 06/08/2000 14:45:06
On Fri, 9 Jun 2000, Simon Burge wrote:
: It seems that way. I've been quite surprised by the support this
: this, and not even a private flame either!
Well, that's a first. I got flames back when I started down this road....
: At the moment, I have (broken up a little so the letters line up):
: GETOPTSTR "a cC e g hjKlLM:mN: O:o:p: r STt:U:u vW:w x"
: SYSVGETOPTSTR "aA defg:G: j lL n: o:p:P s t:U:u: y"
: so the presence of -'AdfGnP' would automatically switch to SysV mode.
The letters may line up, but those that do are not the same between the
modes! For instance, "-e" means something very different to each.
I'm ... not convinced that this can be done properly through flags. Ultrix
tried it, and came up with a bastard child that didn't work quite like
either (and you "forced" BSD mode by *omitting the option dash*).
I'll resuggest my original suggestion along these lines: to introduce
/usr/5bin (a la SunOS 4). This would have several benefits:
- selection of SysV vs. BSD semantics of a command through $PATH;
- no "select via __progname"--just separate programs, that could be in a
separate install set/pkg;
- the ability to symlink /emul/svr4/usr/bin/ps to /usr/5bin/ps and get
something that will make SVR4 scripts happy when runningin a SVR4 shell.
-- Todd Vierling (firstname.lastname@example.org)