Re: system-homed coming at ya suckers

From	Eli the Bearded <*@eli.users.panix.com>
Newsgroups	alt.os.linux, comp.os.linux.misc
Subject	Re: system-homed coming at ya suckers
Date	2020-12-14 22:21 +0000
Organization	Some absurd concept
Message-ID	<eli$2012141717@qaz.wtf> (permalink)
References	<24f0a08cd2d4684a7b101f5019eebb1a@dizum.com> <op.0vhirvn0a3w0dxdave@hodgins.homeip.net> <eli$2012112042@qaz.wtf> <op.0vhryz2ba3w0dxdave@hodgins.homeip.net>

Cross-posted to 2 groups.

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In comp.os.linux.misc, David W. Hodgins <dwhodgins@nomail.afraid.org> wrote:
> Eli the Bearded <*@eli.users.panix.com> wrote:
>> I understood that. Does it work, or does it just make me jump through hoops
>> to run programs?
> Depends on whether you are referring to user supplied scripts or binary
> programs.
> It doesn't prevent running a script through it's interpreter, but does block
> compiled programs.

I think you still fail to understand the question. For a compiled
program (a binary program) there is still an intrepeter.

On this NetBSD system, that is /libexec/ld.elf_so.

/bin/cat: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV),
dynamically linked, interpreter /libexec/ld.elf_so, for NetBSD 9.0, not
stripped

On a Linux system I showed last week /lib64/ld-linux-x86-64.so.2 being
used as an interpreter for a binary with no execute permissions from
chomd. I am curious if noexec really blocks things from running or (as I
strongly suspect) merely requires that you manually supply the
interpeter: /lib64/ld-linux-x86-64.so.2 $HOME/bin/compiledthing

(Changing the interpreter for a binary is a cool ELF trick to do exotic
stuff like use a non-system standard libc. I have done this to get modern
Chrome running on legacy Centos for code testing use.)

>> Fragility in something fundamentally needed is why Lennart Poettering has
>> a bad name.
> Stating that it fails to do things without bothering to check what it
> actually does is what makes most of the systemd detractor posts appear
> to be just trolling.

I've had systemd crash on me, and then found myself in a difficult place
to reboot the system.

   # shutdown -r now
   Failed to start reboot.target: Failed to activate service
   'org.freedesktop.systemd1': timed out
   See system logs and 'systemctl status reboot.target' for details.
   Failed to open /dev/initctl: No such device or address
   Failed to talk to init daemon.
   # systemctl status reboot.target
   Failed to get properties: Connection timed out
   #

Just so it's clear that I have specific fragility in mind, and not
hypothetical cases.

Elijah
------
had a bunch of pulseaudio issues once upon a time, too

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system-homed coming at ya suckers Nomen Nescio <nobody@dizum.com> - 2020-12-10 11:00 +0100
  Re: system-homed coming at ya suckers "J.O. Aho" <user@example.net> - 2020-12-10 13:59 +0100
  Re: system-homed coming at ya suckers John McCue <jmccue@obsd2.mhome.org> - 2020-12-10 21:05 +0000
    Re: system-homed coming at ya suckers "Carlos E.R." <robin_listas@es.invalid> - 2020-12-10 22:34 +0100
      Re: system-homed coming at ya suckers The Natural Philosopher <tnp@invalid.invalid> - 2020-12-11 04:56 +0000
    Re: system-homed coming at ya suckers "J.O. Aho" <user@example.net> - 2020-12-10 22:44 +0100
      Re: system-homed coming at ya suckers Eric Pozharski <whynot@pozharski.name> - 2020-12-11 12:05 +0200
        Re: system-homed coming at ya suckers Rich <rich@example.invalid> - 2020-12-11 13:55 +0000
        Re: system-homed coming at ya suckers Dan Espen <dan1espen@gmail.com> - 2020-12-11 09:03 -0500
          Re: system-homed coming at ya suckers "J.O. Aho" <user@example.net> - 2020-12-11 15:31 +0100
            Re: system-homed coming at ya suckers Dan Espen <dan1espen@gmail.com> - 2020-12-11 10:07 -0500
              Re: system-homed coming at ya suckers Eric Pozharski <whynot@pozharski.name> - 2020-12-12 16:43 +0200
            Re: system-homed coming at ya suckers John McCue <jmccue@obsd2.mhome.org> - 2020-12-11 20:35 +0000
              Re: system-homed coming at ya suckers "Carlos E.R." <robin_listas@es.invalid> - 2020-12-11 22:29 +0100
              Re: system-homed coming at ya suckers "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2020-12-11 16:51 -0500
                Re: system-homed coming at ya suckers Eli the Bearded <*@eli.users.panix.com> - 2020-12-11 23:19 +0000
                Re: system-homed coming at ya suckers The Natural Philosopher <tnp@invalid.invalid> - 2020-12-11 23:23 +0000
                Re: system-homed coming at ya suckers "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2020-12-11 18:41 -0500
                Re: system-homed coming at ya suckers Eli the Bearded <*@eli.users.panix.com> - 2020-12-12 01:42 +0000
                Re: system-homed coming at ya suckers "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2020-12-11 22:00 -0500
                Re: system-homed coming at ya suckers "Carlos E.R." <robin_listas@es.invalid> - 2020-12-12 13:04 +0100
                Re: system-homed coming at ya suckers Aragorn <thorongil@telenet.be> - 2020-12-12 20:05 +0100
                Re: system-homed coming at ya suckers Melzzzzz <Melzzzzz@zzzzz.com> - 2020-12-12 19:24 +0000
                Re: system-homed coming at ya suckers "Carlos E.R." <robin_listas@es.invalid> - 2020-12-12 22:45 +0100
                Re: system-homed coming at ya suckers Rich <rich@example.invalid> - 2020-12-13 02:19 +0000
                Re: system-homed coming at ya suckers Eli the Bearded <*@eli.users.panix.com> - 2020-12-14 22:21 +0000
                Re: system-homed coming at ya suckers Javier <invalid@invalid.invalid> - 2020-12-15 15:34 -0600
                Re: system-homed coming at ya suckers Eli the Bearded <*@eli.users.panix.com> - 2020-12-15 23:48 +0000
                Re: system-homed coming at ya suckers not@telling.you.invalid (Computer Nerd Kev) - 2020-12-15 22:00 +0000
              Re: system-homed coming at ya suckers Henning Hucke <h_hucke+spam.news@newsmail.aeon.icebear.org> - 2020-12-13 12:45 +0000
    Re: system-homed coming at ya suckers Dan Espen <dan1espen@gmail.com> - 2020-12-10 16:50 -0500
      Re: system-homed coming at ya suckers "J.O. Aho" <user@example.net> - 2020-12-11 08:01 +0100
        Re: system-homed coming at ya suckers Michael Bäuerle <michael.baeuerle@stz-e.de> - 2020-12-11 11:43 +0100
          Re: system-homed coming at ya suckers Dan Espen <dan1espen@gmail.com> - 2020-12-11 08:58 -0500
        Re: system-homed coming at ya suckers Dan Espen <dan1espen@gmail.com> - 2020-12-11 08:55 -0500
    Re: system-homed coming at ya suckers Jack Strangio  <jackstrangio@yahoo.com> - 2020-12-15 00:26 +0000
      Re: system-homed coming at ya suckers Dan Espen <dan1espen@gmail.com> - 2020-12-14 21:14 -0500
        Re: system-homed coming at ya suckers not@telling.you.invalid (Computer Nerd Kev) - 2020-12-15 22:19 +0000
          Re: system-homed coming at ya suckers Dan Espen <dan1espen@gmail.com> - 2020-12-15 17:48 -0500
            Re: system-homed coming at ya suckers not@telling.you.invalid (Computer Nerd Kev) - 2020-12-16 22:08 +0000
              Re: system-homed coming at ya suckers not@telling.you.invalid (Computer Nerd Kev) - 2020-12-16 22:13 +0000
      Re: system-homed coming at ya suckers B1ackwater <bw@magikbeanz.net> - 2020-12-14 23:05 -0500
        Re: system-homed coming at ya suckers "Carlos E.R." <robin_listas@es.invalid> - 2020-12-15 13:01 +0100
          Re: system-homed coming at ya suckers B1ackwater <bw@magikbeanz.net> - 2020-12-15 22:52 -0500
            Re: system-homed coming at ya suckers "Carlos E.R." <robin_listas@es.invalid> - 2020-12-16 11:56 +0100
            Re: system-homed coming at ya suckers Eli the Bearded <*@eli.users.panix.com> - 2020-12-16 19:25 +0000
              Re: system-homed coming at ya suckers B1ackwater <bw@magikbeanz.net> - 2020-12-19 01:29 -0500
                Re: system-homed coming at ya suckers doctor@doctor.nl2k.ab.ca (The Doctor) - 2020-12-19 14:54 +0000
          Re: system-homed coming at ya suckers Eric Pozharski <whynot@pozharski.name> - 2020-12-16 12:16 +0200
            Re: system-homed coming at ya suckers "Carlos E.R." <robin_listas@es.invalid> - 2020-12-16 11:58 +0100
              Re: system-homed coming at ya suckers Jasen Betts <usenet@revmaps.no-ip.org> - 2020-12-18 12:15 +0000
  Re: system-homed coming at ya suckers bad sector <forgetski@postit_INVALID_.gov> - 2020-12-10 17:13 -0500
    Re: system-homed coming at ya suckers "J.O. Aho" <user@example.net> - 2020-12-11 08:05 +0100
      Re: system-homed coming at ya suckers bad sector <forgetski@postit_INVALID_.gov> - 2020-12-11 08:33 -0500
      Re: system-homed coming at ya suckers Dan Espen <dan1espen@gmail.com> - 2020-12-11 09:01 -0500
        Re: system-homed coming at ya suckers "J.O. Aho" <user@example.net> - 2020-12-11 16:11 +0100
          Re: system-homed coming at ya suckers Dan Espen <dan1espen@gmail.com> - 2020-12-11 12:46 -0500
            Re: system-homed coming at ya suckers "Carlos E.R." <robin_listas@es.invalid> - 2020-12-11 22:22 +0100
            Re: system-homed coming at ya suckers Jasen Betts <usenet@revmaps.no-ip.org> - 2020-12-11 22:45 +0000
              Re: system-homed coming at ya suckers "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2020-12-11 19:07 -0500
          Re: system-homed coming at ya suckers "Carlos E.R." <robin_listas@es.invalid> - 2020-12-11 22:19 +0100

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