Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.debian.user > #227296
| From | Greg Wooledge <wooledg@eeg.ccf.org> |
|---|---|
| Newsgroups | linux.debian.user |
| Subject | Re: notify via virtual terminal available packages |
| Date | 2020-09-24 16:40 +0200 |
| Message-ID | <ASAzE-4fD-9@gated-at.bofh.it> (permalink) |
| References | <ASjS9-2t3-9@gated-at.bofh.it> <ASzNf-3Kv-7@gated-at.bofh.it> <ASzWW-3NY-3@gated-at.bofh.it> <ASAzE-4fD-11@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, Sep 24, 2020 at 08:10:04AM -0600, Charles Curley wrote: > On Thu, 24 Sep 2020 09:53:59 -0400 > Greg Wooledge <wooledg@eeg.ccf.org> wrote: > > > RANDOM is a bashism, not available in sh, so that won't work in a > > crontab unless you've altered which shell cron is using to parse the > > crontab. > > Well, that's interesting. The file I pulled that from (in /etc/cron.d) > sets two variables explicitly: > > SHELL=/bin/sh > PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin > > And the machine that it runs on shows: > > root@hawk:~# ll /bin/sh > lrwxrwxrwx 1 root root 4 Jan 17 2019 /bin/sh -> dash* In dash, RANDOM does nothing; it's just an empty variable. And as it turns out, dash treats that as a zero. unicorn:~$ dash $ echo $((1 + RANDOM % 1200)) 1 $ echo $((1 + % 1200)) dash: 2: arithmetic expression: expecting primary: "1 + % 1200" $ echo $((1 + XYZZY % 1200)) 1 So you're just doing "sleep 1" every time.
Back to linux.debian.user | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
notify via virtual terminal available packages Pòl Hallen <deben@fuckaround.org> - 2020-09-23 22:50 +0200
Re: notify via virtual terminal available packages john doe <johndoe65534@mail.com> - 2020-09-24 10:40 +0200
Re: notify via virtual terminal available packages Charles Curley <charlescurley@charlescurley.com> - 2020-09-24 15:50 +0200
Re: notify via virtual terminal available packages Greg Wooledge <wooledg@eeg.ccf.org> - 2020-09-24 16:00 +0200
Re: notify via virtual terminal available packages Greg Wooledge <wooledg@eeg.ccf.org> - 2020-09-24 16:40 +0200
Re: notify via virtual terminal available packages Charles Curley <charlescurley@charlescurley.com> - 2020-09-24 16:50 +0200
Re: notify via virtual terminal available packages Greg Wooledge <wooledg@eeg.ccf.org> - 2020-09-24 17:00 +0200
Deterministic delays in POSIX shell scripts (Was: Re: notify via virtual terminal available packages) Andy Smith <andy@strugglers.net> - 2020-09-25 09:50 +0200
Re: Deterministic delays in POSIX shell scripts (Was: Re: notify via virtual terminal available packages) Greg Wooledge <wooledg@eeg.ccf.org> - 2020-09-25 13:50 +0200
Re: Deterministic delays in POSIX shell scripts (Was: Re: notify via virtual terminal available packages) Andy Smith <andy@strugglers.net> - 2020-09-25 14:30 +0200
Re: Deterministic delays in POSIX shell scripts (Was: Re: notify via virtual terminal available packages) David Wright <deblis@lionunicorn.co.uk> - 2020-09-26 04:50 +0200
Re: notify via virtual terminal available packages Charles Curley <charlescurley@charlescurley.com> - 2020-09-24 16:40 +0200
csiph-web