Subject: Re: sysv ps(1) implementation [was: ps(1) sysv silliness]
To: Greywolf <>
From: Todd Vierling <>
List: tech-userlevel
Date: 06/08/2000 15:40:03
On Thu, 8 Jun 2000, Greywolf wrote:

: # 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.
: Why not just do a force to sysV via -A and leave it at that?

Because people don't traditionally use "-A" in sysv scripts that need the
output of "ps".  It's usually something more like "ps -el" or "ps -ef".

: # - 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.
: Hm.  This might make a compelling argument, except that once you go
: to EMUL_SVR4, doesn't everything else after that try to run under the
: same emulation?

No.  exec() chooses emulation based on binary format--_after_ it resolves
the path name (/emul/svr4/usr/bin/ps).

-- Todd Vierling (