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Re: ed

From Lew Pitcher <lew.pitcher@digitalfreehold.ca>
Newsgroups comp.unix.shell
Subject Re: ed
Date 2026-06-11 00:24 +0000
Organization The Pitcher Digital Freehold
Message-ID <110cv8a$143nt$1@dont-email.me> (permalink)
References <slrn112c9fb.2pa2.zaydm@new.localdomain> <1108b56$b00$1@nntp.sonologic.net> <1109qej$2vlaa$1@dont-email.me> <110abmr$ckmk$12@dont-email.me> <110cmrj$32trj$1@dont-email.me>

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On Wed, 10 Jun 2026 22:01:23 +0000, John McCue wrote:

> Lawrence D?Oliveiro <ldo@nz.invalid> wrote:
>> On Tue, 9 Jun 2026 19:44:19 -0000 (UTC), John McCue wrote:
>> 
>>> There is one use for ed(1), when I boot NetBSD into single user
>>> mode, ed(1) is the only one available without jumping through hoops.
>> 
>> Why is that? Is it because NetBSD still has the legacy root-versus-usr
>> separation of executables and libraries?
> 
> From what I have seen, seems Linux does not have a real single
> user mode.  But I think that is OK for Linux.
> 
> NetBSD and the other BSDs have real single user mode where no
> file systems are mounted, no daemons are started and root is
> mounted RO.  NetBSD boots into /bin/sh or a shell of your
> choice and you work from that, no login needed.  Also I think
> only static executables are available for use.

Oh, do you mean initlevel "S" or "s"? As in:
 si:S:sysinit:/etc/rc.d/rc.S
 su:1S:wait:/etc/rc.d/rc.K

20:21:14 $ head /etc/rc.d/rc.S
#!/bin/sh
#
# /etc/rc.d/rc.S:  System initialization script.
#
# Mostly written by:  Patrick J. Volkerding, <volkerdi@slackware.com>
#
20:22:43 $ head -12 /etc/rc.d/rc.K
#! /bin/sh
#
# rc.K          This file is executed by init when it goes into runlevel
#               1, which is the administrative state. It kills all
#               daemons and then puts the system into single user mode.
#               Note that the file systems are kept mounted.
#
# Version:      @(#)/etc/rc.d/rc.K      3.1415 Sat Jan 13 13:37:26 PST 2001
#
# Author:       Miquel van Smoorenburg <miquels@drinkel.nl.mugnet.org>
# Modified by:  Patrick J. Volkerding <volkerdi@slackware.com>
#

Like Slackware??


> I do not know what "legacy root-versus-usr" means, I would
> never want a system that does not have a clear separation
> between root and users.

Agreed.

Although the OP might have meant the current (IMHO aberrant) trend
of dispensing with the /bin vs /usr/bin (etc) dichotomy. 


-- 
Lew Pitcher
"In Skills We Trust"
Not LLM output - I'm just like this.

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Thread

ed __ ___ ________ ____ ______. Zayd Mohammed <zaydm@172.24.208.1> - 2026-06-08 02:16 +0000
  Re: ed __ ___ ________ ____ ______. Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-06-08 04:46 +0200
    Re: ed __ ___ ________ ____ ______. cross@spitfire.i.gajendra.net (Dan Cross) - 2026-06-08 13:44 +0000
      Re: ed __ ___ ________ ____ ______. gazelle@shell.xmission.com (Kenny McCormack) - 2026-06-08 14:12 +0000
        Re: ed. cross@spitfire.i.gajendra.net (Dan Cross) - 2026-06-08 19:30 +0000
      Re: ed __ ___ ________ ____ ______. Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-06-08 14:40 -0700
        Re: ed __ ___ ________ ____ ______. groenveld@acm.org (John D Groenveld) - 2026-06-09 00:04 +0000
        Re: ed __ ___ ________ ____ ______. Adam Sampson <ats@offog.org> - 2026-06-09 01:50 +0100
        Re: ed __ ___ ________ ____ ______. Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-06-09 16:47 +0200
          Re: ed __ ___ ________ ____ ______. Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-06-09 16:41 -0700
      Re: ed __ ___ ________ ____ ______. Ben Collver <bencollver@tilde.pink> - 2026-06-09 14:27 +0000
    Re: ed __ ___ ________ ____ ______. Eric Pozharski <apple.universe@posteo.net> - 2026-06-08 22:28 +0000
    Re: ed __ ___ ________ ____ ______. Lumin Etherlight <lumin+usenet@etherlight.link> - 2026-06-09 03:25 +0300
      Re: ed __ ___ ________ ____ ______. Daniel Cerqueira <dan.list@lispclub.com> - 2026-06-09 09:47 +0100
        Re: ed __ ___ ________ ____ ______. Joerg Mertens <joerg-mertens@t-online.de> - 2026-06-09 15:53 +0200
          Re: ed __ ___ ________ ____ ______. Daniel Cerqueira <dan.list@lispclub.com> - 2026-06-09 21:00 +0100
          Re: ed __ ___ ________ ____ ______. Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-06-09 16:29 -0700
            Re: ed __ ___ ________ ____ ______. Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-06-11 08:39 +0200
              Re: ed __ ___ ________ ____ ______. Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-06-11 13:40 -0700
                Re: ed __ ___ ________ ____ ______. Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-06-12 16:56 +0200
                Re: ed __ ___ ________ ____ ______. Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-06-12 15:22 -0700
                Re: ed __ ___ ________ ____ ______. Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-06-13 00:58 +0200
      Re: ed __ ___ ________ ____ ______. Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-06-09 17:57 +0200
  Re: ed __ ___ ________ ____ ______. John McCue <jmclnx@gmail.com.invalid> - 2026-06-08 22:57 +0000
  Re: ed __ ___ ________ ____ ______. Lumin Etherlight <lumin+usenet@etherlight.link> - 2026-06-09 03:02 +0300
  Re: ed __ ___ ________ ____ ______. gmc@metro.cx (Koen Martens) - 2026-06-09 06:17 +0000
    Re: ed __ ___ ________ ____ ______. Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-09 06:55 +0000
    Re: ed __ ___ ________ ____ ______. John McCue <jmclnx@gmail.com.invalid> - 2026-06-09 19:44 +0000
      Re: ed __ ___ ________ ____ ______. Top Dead Ctr <tdc@invalid.invalid> - 2026-06-09 14:09 -0600
      Re: ed __ ___ ________ ____ ______. Christian Weisgerber <naddy@mips.inka.de> - 2026-06-09 23:52 +0000
        Re: ed Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-10 00:40 +0000
      Re: ed Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-10 00:38 +0000
        Re: ed John McCue <jmclnx@gmail.com.invalid> - 2026-06-10 22:01 +0000
          Re: ed Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-06-10 16:43 -0700
            Re: ed Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-06-10 16:50 -0700
            Re: ed cross@spitfire.i.gajendra.net (Dan Cross) - 2026-06-10 23:53 +0000
              Re: ed Eli the Bearded <*@eli.users.panix.com> - 2026-06-11 00:12 +0000
                Re: ed Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-11 00:55 +0000
                Re: ed cross@spitfire.i.gajendra.net (Dan Cross) - 2026-06-11 02:00 +0000
                Re: ed Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2026-06-10 19:30 -0700
                Re: ed cross@spitfire.i.gajendra.net (Dan Cross) - 2026-06-11 11:31 +0000
                Re: ed Christian Weisgerber <naddy@mips.inka.de> - 2026-06-11 15:02 +0000
              Re: ed Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-06-11 08:46 +0200
            Re: ed John McCue <jmclnx@gmail.com.invalid> - 2026-06-11 14:28 +0000
          Re: ed cross@spitfire.i.gajendra.net (Dan Cross) - 2026-06-10 23:48 +0000
          Re: ed Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2026-06-11 00:24 +0000
            Re: ed John McCue <jmclnx@gmail.com.invalid> - 2026-06-11 14:11 +0000
              Re: ed Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-12 00:22 +0000
          Re: ed Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-11 00:53 +0000
            Re: ed Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-06-11 09:02 +0200
    Re: ed __ ___ ________ ____ ______. Nuno Silva <nunojsilva@invalid.invalid> - 2026-06-10 11:03 +0100
      Re: ed __ ___ ________ ____ ______. Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2026-06-11 09:12 +0200
        Re: ed __ ___ ________ ____ ______. Nuno Silva <nunojsilva@invalid.invalid> - 2026-06-12 09:44 +0100
          Android editor (Was: ed __ ___ ________ ____ ______.) gazelle@shell.xmission.com (Kenny McCormack) - 2026-06-12 09:03 +0000
            Re: Android editor Nuno Silva <nunojsilva@invalid.invalid> - 2026-06-12 12:01 +0100

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