From: Martijn Dekker <martijn@inlv.org>
To: Bart Schaefer <schaefer@brasslantern.com>, zsh-workers@zsh.org
Subject: Re: '>>' does not create file if set -C (noclobber) is active
Date: Thu, 25 Jun 2015 04:22:35 +0200 [thread overview]
Message-ID: <558B65EB.3060204@inlv.org> (raw)
In-Reply-To: <150624184916.ZM19079@torch.brasslantern.com>
Bart Schaefer schreef op 25-06-15 om 03:49:
> On Jun 25, 3:02am, Martijn Dekker wrote:
> }
> } If the 'noclobber' option (set -C) is active, the append ('>>') output
> } redirection will not create a file if it doesn't exist.
> }
> } POSIX:
>
> The noclobber option is an extension, and has nothing whatsoever to do
> with POSIX. It is not normally on in any emulation, so as soon as you
> set it you're off in the weeds and appeal to POSIX is meaningless.
That is not correct.
See:
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_25
-C
(Uppercase C.) Prevent existing files from being overwritten by the
shell's '>' redirection operator (see Redirecting Output); the ">|"
redirection operator shall override this noclobber option for an
individual file.
[...]
-o option
[...]
noclobber
Equivalent to -C (uppercase C).
Thanks,
- M.
next prev parent reply other threads:[~2015-06-25 2:27 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-25 1:02 Martijn Dekker
2015-06-25 1:49 ` Bart Schaefer
2015-06-25 2:22 ` Martijn Dekker [this message]
2015-06-25 7:30 ` Bart Schaefer
2015-06-25 14:04 ` Stephane Chazelas
2015-06-25 16:00 ` Bart Schaefer
2015-06-25 19:20 ` Chet Ramey
2015-06-26 14:14 ` Martijn Dekker
2015-06-26 20:15 ` Bart Schaefer
2015-06-27 1:54 ` Martijn Dekker
2015-06-27 3:38 ` Bart Schaefer
2015-06-27 17:02 ` Peter Stephenson
2015-06-28 0:02 ` Martijn Dekker
2015-06-28 0:46 ` Martijn Dekker
2015-06-28 7:48 ` Stephane Chazelas
2015-06-28 9:15 ` Oliver Kiddle
2015-06-28 14:00 ` Stephane Chazelas
2015-06-28 18:38 ` Bart Schaefer
2015-06-28 19:30 ` Stephane Chazelas
2015-07-23 2:56 ` PATCH: sysopen (was Re: '>>' does not create file if set -C (noclobber) is active) Oliver Kiddle
2015-07-24 10:57 ` Peter Stephenson
2015-07-24 11:55 ` Peter Stephenson
2015-07-30 11:05 ` Mikael Magnusson
2015-07-31 12:41 ` Oliver Kiddle
2015-07-31 14:02 ` Mikael Magnusson
2015-06-28 17:19 ` '>>' does not create file if set -C (noclobber) is active Peter Stephenson
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