From: dave@horsfall.org (Dave Horsfall)
Subject: [TUHS] /bin/true (was basic tools / Universal Unix)
Date: Fri, 20 Oct 2017 10:25:28 +1100 (EST) [thread overview]
Message-ID: <alpine.BSF.2.21.1710201009190.30357@aneurin.horsfall.org> (raw)
In-Reply-To: <CABF1D6B-C9DD-422A-8303-04CEB7AA1DCC@ronnatalie.com>
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On Thu, 19 Oct 2017, Ronald Natalie wrote:
> /bin/maybe goes well with the motd that says “You might have mail.” I
> told one of my student programmers that he could put that in the motd
> and I guaranteed that within an hour someone would come in and tell me
> that he checked and he didn’t have mail. Sure enough one of my senior
> programmers came in and said “It said I might have mail and I didn’t
> have any.” I pointed out it only said “might.”
Seriously, it could be used in test scripts, to see whether a test depends
implicitly upon a previous one, so if something fails it would be worthy
of investigation.
Usage: maybe [p]
Returns "true" (0) with a probability of "p" [0.0:1.0] (default: 0.5),
else "false" (1).
C: exit(**argv != 't'); // Assumes "t*" or not.
--
Dave Horsfall DTM (VK2KFU) "Those who don't understand security will suffer."
next prev parent reply other threads:[~2017-10-19 23:25 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-19 14:52 /bin/true (was [TUHS] " Ron Natalie
2017-10-19 15:01 ` Pete Wright
2017-10-19 15:17 ` Chet Ramey
2017-10-19 21:23 ` Steffen Nurpmeso
2017-10-19 21:43 ` Chet Ramey
2017-10-19 23:00 ` [TUHS] /bin/true (was " Dave Horsfall
2017-10-19 23:14 ` Grant Taylor
2017-10-19 23:23 ` Lyndon Nerenberg
2017-10-19 23:27 ` Kurt H Maier
2017-10-22 4:18 ` Dave Horsfall
2017-10-20 12:10 ` Chet Ramey
2017-10-19 21:43 ` /bin/true (was [TUHS] " Dave Horsfall
2017-10-19 22:04 ` Ronald Natalie
2017-10-19 23:25 ` Dave Horsfall [this message]
[not found] ` <CAEoi9W7YZ7YXUip0JTMGip3Nd0czgdjqRCMRcK2GYmDJsckuDg@mail.gmail.com>
[not found] ` <CAEoi9W4zdJ3+RXjK5-5rAJ6rwx_0kx6N-bn1U61=txJGyLT_mw@mail.gmail.com>
2017-10-20 1:27 ` [TUHS] /bin/true (was " Dan Cross
2017-10-20 1:31 ` Lyndon Nerenberg
2017-10-20 2:05 ` Ronald Natalie
2017-11-28 16:21 ` Nemo
2017-11-28 17:56 ` Warner Losh
2017-11-28 18:26 ` Dan Cross
2017-11-28 18:41 ` Warner Losh
2017-11-28 19:09 ` Dan Cross
2017-11-28 20:34 ` Clem Cole
2017-11-28 22:42 ` Ralph Corderoy
2017-11-28 18:34 ` Bakul Shah
2017-11-28 23:25 ` Ralph Corderoy
2017-10-22 23:00 Doug McIlroy
2017-10-23 1:11 ` Dan Cross
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