From: michael@kjorling.se (Michael Kjörling)
Subject: [TUHS] Bourne shell and comments
Date: Fri, 21 Apr 2017 13:20:22 +0000 [thread overview]
Message-ID: <20170421132022.GA16779@yeono.kjorling.se> (raw)
In-Reply-To: <201704210328.v3L3S6MI010851@freefriends.org>
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On 20 Apr 2017 21:28 -0600, from arnold at skeeve.com:
>> The # was nod to the # being the first characters of the C program to say
>> to use the preprocessor; but I've forgotten why the bang was added before
>> the path. It could have been almost anything.
>
> Perhaps reminiscent of the '!' escape to shell in ed and maybe
> some other interactive programs of the time? That's purely a guess
> on my part.
How about that # could start a C preprocessor directive, but no C
preprocessor directives begins with `!'? Makes it easy for the C
compiler or preprocessor to check that it isn't being fed a random
script.
--
Michael Kjörling • https://michael.kjorling.se • michael at kjorling.se
“People who think they know everything really annoy
those of us who know we don’t.” (Bjarne Stroustrup)
next prev parent reply other threads:[~2017-04-21 13:20 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-18 20:48 Warren Toomey
2017-04-18 20:51 ` Ron Natalie
2017-04-18 21:45 ` Grant Taylor
2017-04-18 22:16 ` Ron Natalie
2017-04-18 22:40 ` Toby Thain
2017-04-19 18:36 ` Stephen Kitt
2017-04-19 20:35 ` Arthur Krewat
2017-04-19 0:50 ` Lyndon Nerenberg
2017-04-19 8:35 ` Andreas Kusalananda Kähäri
2017-04-19 16:31 ` Grant Taylor
2017-04-19 16:59 ` Andreas Kusalananda Kähäri
2017-04-19 17:36 ` Bakul Shah
2017-04-19 17:59 ` Grant Taylor
2017-04-20 20:13 ` Clem Cole
2017-04-20 20:17 ` Chet Ramey
2017-04-21 3:28 ` arnold
2017-04-21 3:43 ` Bakul Shah
2017-04-21 6:07 ` Steve Nickolas
2017-04-21 11:18 ` Clem cole
2017-04-21 13:20 ` Michael Kjörling [this message]
2017-04-18 20:56 ` Chet Ramey
2017-04-19 21:02 ` Sven Mascheck
2017-04-19 22:07 ` Steffen Nurpmeso
2017-04-20 0:31 ` shawn wilson
2017-04-20 0:35 ` shawn wilson
2017-04-20 3:50 ` Andy Kosela
2017-04-20 4:47 ` Warner Losh
2017-04-21 1:42 ` Nemo
2017-04-21 10:54 ` Ron Natalie
2017-04-21 14:22 ` Andy Kosela
2017-04-21 14:45 ` Ron Natalie
2017-04-22 2:46 ` Dave Horsfall
2017-04-20 16:39 ` Sven Mascheck
2017-04-20 21:42 ` Steffen Nurpmeso
2017-04-19 19:18 Doug McIlroy
2017-04-21 17:03 Doug McIlroy
2017-04-21 18:15 ` Clem Cole
2017-04-21 19:13 ` Steve Johnson
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