Re: libps

[Roland McGrath <frob@debian.org>]

> On Tue, Jan 25, 2000 at 12:37:20AM -0500, Roland McGrath wrote:
> > No, there isn't one.  The proc server only returns you the owner uid (which
> > is usually the same as the first effective uid).  I suppose it could have a
> > call to return full id sets for each process.  Can you get this information
> > from ps is Unix?
> 
> One can get the gid via ps -G gid under Linux, DEC and Solaris:

There is no -G on my Linux syste.  

> >From the dec ps man page:
> 
>   -G glist
>         Writes information for processes whose real group ID numbers or
>         names are given in glist.  The glist is a list of process-group
>         identifiers enclosed in " " (double quotes) and separated from
>         one another by a comma or one or more spaces (or tabs), or both.
>         Because of the way the shell treats spaces and tabs, you need to
>         quote space-separated lists.

That is about selecting processes based on GID, which is different from
showing the GIDs of processes.  (Though the Hurd ps has neither.)