Re: Basic ps Tips

On 2024-08-04, Christian Weisgerber <naddy@mips.inka.de> wrote:

Dunno what to make out of it, but apparently one reason to use grep
instead of -C is portability.

>
ps(1)'s arguments are not portable in practice anyway.

I'll just quote the OpenBSD man page:

------------------->
STANDARDS
     The ps utility is compliant with the IEEE Std 1003.1-2008 ("POSIX.1")
     specification, except that the flag [-G] is unsupported and the flags
     [-ptU] support only single arguments, not lists.

     The flags [-defglnu] are marked by IEEE Std 1003.1-2008 ("POSIX.1") as
     being an X/Open System Interfaces option.  Of these, [-dfgn] are not
     supported by this implementation of ps; behaviour for the flags [-elu]
     differs between this implementation and the X/Open System Interfaces
     option of IEEE Std 1003.1-2008 ("POSIX.1").

     The flags [-cfHhjkLMmNOrSTvWwx] are extensions to IEEE Std 1003.1-2008
     ("POSIX.1").

     Only the following keywords are recognised by IEEE Std 1003.1-2008
     ("POSIX.1"): args, comm, etime, group, nice, pcpu, pgid, pid, ppid,
     rgroup, ruser, time, tty, user, and vsz.
<-------------------

--
Christian "naddy" Weisgerber                          naddy@mips.inka.de