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Re: bug#12365: Should cp -n return 0, when DEST exists?


From: Bernhard Voelker
Subject: Re: bug#12365: Should cp -n return 0, when DEST exists?
Date: Thu, 6 Sep 2012 18:52:22 +0200 (CEST)

On September 6, 2012 at 5:24 PM Jim Meyering <address@hidden> wrote:

> Bernhard Voelker wrote:
> > Maybe it's worth adding a line about the exist status
> > when using -n or -i (together with answering 'n')?
>
> Yes, please.  That would be an improvement.

(my first patch created on cygwin)


>From 65d2d16340cee38f0a7e059af86be49f21eef84d Mon Sep 17 00:00:00 2001
From: Bernhard Voelker <address@hidden>
Date: Thu, 6 Sep 2012 18:39:47 +0200
Subject: [PATCH] doc: improve documentation of -n and -i for cp and mv
* doc/coreutils.texi (cp invocation): Add a note about to the
description of the option -n how it compares to -i. Add a note
about a possible exit status zero when -n or -i is used.
(mv invocation): Likewise.
---
doc/coreutils.texi | 25 +++++++++++++++++++++++--
1 files changed, 23 insertions(+), 2 deletions(-)
diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index f2620bc..0324d1b 100644
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -7772,8 +7772,14 @@ a regular file in the destination tree.
@opindex -n
@opindex --no-clobber
Do not overwrite an existing file. The @option{-n} option overrides a previous
-@option{-i} option. This option is mutually exclusive with @option{-b} or
-@option{--backup} option.
+@option{-i} option.
+@macro optClobberAndI
+In effect, this option works as if the option @option{-i}
+was given and the user declined all questions to overwrite the targets (sure
+enough without prompting).
+@end macro
+@optClobberAndI
+This option is mutually exclusive with @option{-b} or @option{--backup} option.

@item -P
@itemx --no-dereference
@@ -8026,8 +8032,15 @@ However, mount point directories @emph{are} copied.

@end table

+@cindex exit status of @command{cp}
+Exit status:
+
@exitstatus

+However, if the existing target is not overwritten because the option
+@option{-n} is used or the option @option{-i} is used and the user has declined
+overwriting that file, then @command{cp}'s exit status is yet zero.
+

@node dd invocation
@section @command{dd}: Convert and copy a file
@@ -8747,6 +8760,7 @@ If the response is not affirmative, the file is skipped.
@cindex prompts, omitting
Do not overwrite an existing file.
@mvOptsIfn
+@optClobberAndI
This option is mutually exclusive with @option{-b} or @option{--backup} option.

@item -u
@@ -8778,8 +8792,15 @@ Print the name of each file before moving it.

@end table

+@cindex exit status of @command{mv}
+Exit status:
+
@exitstatus

+However, if the existing target is not overwritten because the option
+@option{-n} is used or the option @option{-i} is used and the user has declined
+overwriting that file, then @command{mv}'s exit status is yet zero.
+

@node rm invocation
@section @command{rm}: Remove files or directories
--
1.7.9




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