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Groups > comp.sys.raspberry-pi > #25783 > unrolled thread
| Started by | Simple Simon <please.dontspa@me.com> |
|---|---|
| First post | 2021-01-12 12:14 +0000 |
| Last post | 2021-01-17 13:53 +0000 |
| Articles | 9 on this page of 89 — 22 participants |
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Battery Powered Project Simple Simon <please.dontspa@me.com> - 2021-01-12 12:14 +0000
Re: Battery Powered Project Chris Green <cl@isbd.net> - 2021-01-12 12:40 +0000
Re: Battery Powered Project Simple Simon <please.dontspa@me.com> - 2021-01-12 12:50 +0000
Re: Battery Powered Project "A. Dumas" <alexandre@dumas.fr.invalid> - 2021-01-12 15:15 +0100
Re: Battery Powered Project Theo <theom+news@chiark.greenend.org.uk> - 2021-01-12 21:43 +0000
Re: Battery Powered Project Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-13 09:40 +0000
Re: Battery Powered Project Jim H <invalid@invalid.invalid> - 2021-01-13 18:02 +0000
Re: Battery Powered Project Joe <joe@jretrading.com> - 2021-01-13 22:04 +0000
Re: Battery Powered Project Theo <theom+news@chiark.greenend.org.uk> - 2021-01-13 23:37 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-14 00:43 +0000
Re: Battery Powered Project The Natural Philosopher <tnp@invalid.invalid> - 2021-01-14 03:59 +0000
Re: Battery Powered Project Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-14 10:18 +0000
Re: Battery Powered Project The Natural Philosopher <tnp@invalid.invalid> - 2021-01-14 11:04 +0000
Re: Battery Powered Project Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-14 11:46 +0000
Re: Battery Powered Project The Natural Philosopher <tnp@invalid.invalid> - 2021-01-14 12:21 +0000
Re: Battery Powered Project Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-14 12:38 +0000
Re: Battery Powered Project David Higton <dave@davehigton.me.uk> - 2021-01-14 14:17 +0000
Re: Battery Powered Project The Natural Philosopher <tnp@invalid.invalid> - 2021-01-14 14:28 +0000
Re: Battery Powered Project David Higton <dave@davehigton.me.uk> - 2021-01-16 20:09 +0000
Re: Battery Powered Project The Natural Philosopher <tnp@invalid.invalid> - 2021-01-17 07:19 +0000
Re: Battery Powered Project David Higton <dave@davehigton.me.uk> - 2021-01-17 15:57 +0000
Re: Battery Powered Project The Natural Philosopher <tnp@invalid.invalid> - 2021-01-18 07:05 +0000
Re: Battery Powered Project David Higton <dave@davehigton.me.uk> - 2021-01-18 14:14 +0000
Re: Battery Powered Project John Aldridge <jpsa@cantab.net> - 2021-01-17 17:52 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-14 12:56 +0000
Re: Battery Powered Project Theo <theom+news@chiark.greenend.org.uk> - 2021-01-14 13:46 +0000
Re: Battery Powered Project The Natural Philosopher <tnp@invalid.invalid> - 2021-01-14 14:26 +0000
Re: Battery Powered Project The Natural Philosopher <tnp@invalid.invalid> - 2021-01-14 03:46 +0000
Re: Battery Powered Project Folderol <general@musically.me.uk> - 2021-01-14 09:23 +0000
Re: Battery Powered Project The Natural Philosopher <tnp@invalid.invalid> - 2021-01-14 11:04 +0000
Re: Battery Powered Project Folderol <general@musically.me.uk> - 2021-01-14 17:48 +0000
Re: Battery Powered Project Jim H <invalid@invalid.invalid> - 2021-01-18 17:07 +0000
Re: Battery Powered Project Joe <joe@jretrading.com> - 2021-01-18 20:33 +0000
Re: Battery Powered Project Jim H <invalid@invalid.invalid> - 2021-01-21 20:36 +0000
Battery Powered Project nospam.Vincent.Coen@f1.n250.z2.binkp.net (Vincent Coen) - 2021-01-12 14:35 +1300
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-12 16:40 +0000
Re: Battery Powered Project The Natural Philosopher <tnp@invalid.invalid> - 2021-01-13 13:56 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-13 15:12 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-16 12:24 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-16 17:53 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-16 20:39 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-16 22:33 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-16 23:30 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-16 23:52 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-17 10:39 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-17 14:32 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-18 13:20 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-18 13:41 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-18 14:02 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-18 15:15 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-19 13:46 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-19 15:24 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-19 15:34 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-19 16:21 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-19 17:18 +0000
Re: Battery Powered Project Richard Kettlewell <invalid@invalid.invalid> - 2021-01-19 19:31 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-20 10:12 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-19 22:15 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-20 10:03 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-20 10:49 +0000
Re: Battery Powered Project Chris Elvidge <chris@mshome.net> - 2021-01-20 11:29 +0000
Re: Battery Powered Project A. Dumas <alexandre@dumas.fr.invalid> - 2021-01-20 12:18 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-20 13:02 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-20 15:49 +0000
Re: Battery Powered Project Richard Kettlewell <invalid@invalid.invalid> - 2021-01-20 16:54 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-20 17:19 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-21 10:24 +0000
Re: Battery Powered Project A. Dumas <alexandre@dumas.fr.invalid> - 2021-01-20 12:18 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-20 13:18 +0000
Re: Battery Powered Project Chris Elvidge <chris@mshome.net> - 2021-01-20 14:14 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-20 14:51 +0000
Re: Battery Powered Project A. Dumas <alexandre@dumas.fr.invalid> - 2021-01-20 14:45 +0000
Re: Battery Powered Project A. Dumas <alexandre@dumas.fr.invalid> - 2021-01-20 14:44 +0000
Re: Battery Powered Project Richard Kettlewell <invalid@invalid.invalid> - 2021-01-20 15:07 +0000
Re: Battery Powered Project "A. Dumas" <alexandre@dumas.fr.invalid> - 2021-01-20 16:38 +0100
Re: Battery Powered Project Chris Elvidge <chris@mshome.net> - 2021-01-20 15:45 +0000
Re: Battery Powered Project druck <news@druck.org.uk> - 2021-01-21 10:07 +0000
Re: Battery Powered Project "A. Dumas" <alexandre@dumas.fr.invalid> - 2021-01-21 12:30 +0100
Re: Battery Powered Project druck <news@druck.org.uk> - 2021-01-21 13:09 +0000
Re: Battery Powered Project Anssi Saari <as@sci.fi> - 2021-01-22 10:08 +0200
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-22 10:29 +0000
Re: Battery Powered Project Chris Green <cl@isbd.net> - 2021-01-22 10:25 +0000
Re: Battery Powered Project Kees Nuyt <k.nuyt@nospam.demon.nl> - 2021-01-19 17:03 +0100
Re: Battery Powered Project A. Dumas <alexandre@dumas.fr.invalid> - 2021-01-17 01:09 +0000
Re: Battery Powered Project Chris Elvidge <chris@mshome.net> - 2021-01-17 11:48 +0000
Re: Battery Powered Project Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-17 12:11 +0000
Re: Battery Powered Project Martin Gregorie <martin@mydomain.invalid> - 2021-01-17 14:43 +0000
Re: Battery Powered Project Chris Elvidge <chris@mshome.net> - 2021-01-17 11:52 +0000
Re: Battery Powered Project Andy Burns <usenet@andyburns.uk> - 2021-01-17 13:53 +0000
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| From | Martin Gregorie <martin@mydomain.invalid> |
|---|---|
| Date | 2021-01-22 10:29 +0000 |
| Message-ID | <rue9dv$7st$1@dont-email.me> |
| In reply to | #26023 |
On Fri, 22 Jan 2021 10:08:25 +0200, Anssi Saari wrote: > By the way, since I haven't seen this mentioned, Debian provides a tool > to manage those symlinks in /etc/alternatives, it's called > update-alternatives. IMO it has an obscure syntax and is hard to use but > I'd say it's still better than manually modifying the symlinks. > I think you'll find that all Linux distros (and the remaining Unixen) have a similar tool, though the name may differ between distros: Fedora calls the tool 'alternatives'. As always, the apropos tool is your friend here: "apropos alternate" finds 'alternatives' on my laptop, a Fedora system, and 'update_alternatives' on my RPi. -- -- Martin | martin at Gregorie | gregorie dot org
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| From | Chris Green <cl@isbd.net> |
|---|---|
| Date | 2021-01-22 10:25 +0000 |
| Message-ID | <aplqdh-bnra.ln1@esprimo.zbmc.eu> |
| In reply to | #26023 |
Anssi Saari <as@sci.fi> wrote: > druck <news@druck.org.uk> writes: > > >> Huh. Thanks for checking. Perhaps I am the "victim" of an automated > >> switch from mawk to gawk after installing it as a dependency from > >> other things I always install. > > > > I think that is the case, as I don't recall ever deliberately > > installing gawk on those two machine. > > Could be. I have two Pis, one is running Raspbian 8 and > /etc/alternatives/awk points to mawk. The other is running Raspbian 10 > and /etc/alternatives/awk points to gawk. I don't think I have installed > gawk on the latter but I don't really remember for sure. > > By the way, since I haven't seen this mentioned, Debian provides a tool > to manage those symlinks in /etc/alternatives, it's called > update-alternatives. IMO it has an obscure syntax and is hard to use but > I'd say it's still better than manually modifying the symlinks. Yes, update-alternatives is an exercise in being as arcane as possible I'm sure! :-) I think, in general, if you explicitly install gawk or mawk then they will set themselves as the preferred (by update-alternatives) version of awk. -- Chris Green ยท
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| From | Kees Nuyt <k.nuyt@nospam.demon.nl> |
|---|---|
| Date | 2021-01-19 17:03 +0100 |
| Message-ID | <1g0e0ghaq06r2mcbiud967qndlm1l604s0@dim53.demon.nl> |
| In reply to | #25968 |
On Tue, 19 Jan 2021 13:46:18 +0000, Pancho <Pancho.Dontmaileme@outlook.com> wrote: > Yeah that is kind of the point, I'm a mediocre old programmer, I don't > want to know everything about everything. What I want is an easy life. I > want a basic technique to work, reliably, environment agnostically as > possible. > > I think this clarifies in my mind why I wouldn't ever use this technique > to observe events in practice. It is too fragile. FWIW: I use gawk to follow logfiles, and the fflush() function to flush the output buffers. Snippet of Bash script : tail -f -n $TLINES $LOGFILE \ | gawk -f $SCRIPT.awk \ | sqlite3 $DATABASE pseudocode of $SCRIPT.awk : process every input line console output to "/dev/stderr" -> realtime filtered, reformatted view SQL statements to stdout -> statistics After processing every input line: fflush() -- Regards, Kees Nuyt
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| From | A. Dumas <alexandre@dumas.fr.invalid> |
|---|---|
| Date | 2021-01-17 01:09 +0000 |
| Message-ID | <60038e51$0$11310$e4fe514c@news.xs4all.nl> |
| In reply to | #25938 |
Martin Gregorie <martin@mydomain.invalid> wrote: > sudo echo "Another message" 2>&1 | logsave /var/log/messages - sudo echo ... | ... doesn't work the way you probably intend. The sudo only applies to echo, not the second command. You could use instead: sudo logsave -a logfile command_with_parameters &>/dev/null
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| From | Chris Elvidge <chris@mshome.net> |
|---|---|
| Date | 2021-01-17 11:48 +0000 |
| Message-ID | <ru1879$9oo$1@dont-email.me> |
| In reply to | #25935 |
On 16/01/2021 05:53 pm, Martin Gregorie wrote:
> In fact I couldn't get the following to work at all:
>
> sudo journalctl -f | awk '{ print $0 }'
Why would you use awk at all here? You're just (re)printing the input line.
BTW the above works here - LMDE4, GNU awk 4.2
--
Chris Elvidge
England
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| From | Pancho <Pancho.Dontmaileme@outlook.com> |
|---|---|
| Date | 2021-01-17 12:11 +0000 |
| Message-ID | <ru19gr$h31$1@dont-email.me> |
| In reply to | #25944 |
On 17/01/2021 11:48, Chris Elvidge wrote:
> On 16/01/2021 05:53 pm, Martin Gregorie wrote:
>> In fact I couldn't get the following to work at all:
>>
>> sudo journalctl -f | awk '{ print $0 }'
>
> Why would you use awk at all here? You're just (re)printing the input line.
> BTW the above works here - LMDE4, GNU awk 4.2
>
If you had read the thread, you would have seen that I was testing
potential buffering, i.e. awk's timely response to input from the
journalctl -f.
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| From | Martin Gregorie <martin@mydomain.invalid> |
|---|---|
| Date | 2021-01-17 14:43 +0000 |
| Message-ID | <ru1ien$qub$2@dont-email.me> |
| In reply to | #25944 |
On Sun, 17 Jan 2021 11:48:55 +0000, Chris Elvidge wrote:
> On 16/01/2021 05:53 pm, Martin Gregorie wrote:
>> In fact I couldn't get the following to work at all:
>>
>> sudo journalctl -f | awk '{ print $0 }'
>
> Why would you use awk at all here? You're just (re)printing the input
> line.
I think that was just simple proof-of-concept test code to check that awk
was reading the journalctl output stream. Quite reasonable if you've
never user awk before.
> BTW the above works here - LMDE4, GNU awk 4.2
>
I don't recall needing the '--' in the "awk -- 'short awk prog'" command
before, but there seems to have been a bit of rationalisation going on. I
notice that now (Fedora 32) /usr/bin/awk is now a symlink pointing to /
usr/bin/gawk but don't know when that happened or which other distros do
the same.
--
--
Martin | martin at
Gregorie | gregorie dot org
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| From | Chris Elvidge <chris@mshome.net> |
|---|---|
| Date | 2021-01-17 11:52 +0000 |
| Message-ID | <ru18el$au2$1@dont-email.me> |
| In reply to | #25935 |
On 16/01/2021 05:53 pm, Martin Gregorie wrote:
> In fact I couldn't get the following to work at all:
>
> sudo journalctl -f | awk '{ print $0 }'
Sorry Martin. This shouldn't have been attributed to you; it was Pancho
that wrote it. Selecting some message text in Thunderbird seems to
confuse it; however I should remember to check attributions before sending.
--
Chris Elvidge
England
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| From | Andy Burns <usenet@andyburns.uk> |
|---|---|
| Date | 2021-01-17 13:53 +0000 |
| Message-ID | <i6itq4Fshp8U1@mid.individual.net> |
| In reply to | #25945 |
Chris Elvidge wrote: > Selecting some message text in Thunderbird seems to confuse it It doesn't confuse it as such, but it only quotes the selected text, however it still adds an attribution for the author of the message you're replying to.
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