From: Paul Eggert <eggert@cs.ucla.edu>
To: Eli Zaretskii <eliz@gnu.org>
Cc: ran@lasgalen.net, 16133@debbugs.gnu.org
Subject: bug#16133: 24.3; copy-file fails on chmod when copying to FAT filesystem
Date: Sun, 22 Dec 2013 10:54:48 -0800 [thread overview]
Message-ID: <52B73578.3070407@cs.ucla.edu> (raw)
In-Reply-To: <83eh5491j8.fsf@gnu.org>
Eli Zaretskii wrote:
> A library function should
> never decide on its own when to call it quits
Copy-file signals errors in many circumstances;
this is just one of them. If the goal is to have
a library function that does not "decide on its
own when to call it quits", then the function should
return a value indicating the error, rather than
throwing an exception. That might be too much of
a change to copy-file, but we could have a variant
of copy-file that does that, suitable for library
use.
> It is only justified to do that when the
> error is fatal; this one isn't: the file was copied.
The contents of the file were copied, but the permissions
were not. The specification of copy-file says that it
copies both contents and permissions.
I would favor changing the specification of copy-file,
so that it doesn't copy the permissions
unless its 6th argument is non-nil. We could change
the name of the 6th argument to PRESERVE-PERMISSIONS.
The 6th argument already governs how permissions are
preserved, so this would be a reasonable change. I don't
think it'd hurt existing applications, since the default
permissions when creating a file would be the same as
it is now -- the only change would be that copy-file
wouldn't attempt to change the permissions of an already-existing
file unless PRESERVE-PERMISSIONS is non-nil.
next prev parent reply other threads:[~2013-12-22 18:54 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-13 19:51 bug#16133: 24.3; copy-file fails on chmod when copying to FAT filesystem Artem Chuprina
2013-12-13 22:51 ` Glenn Morris
2013-12-13 22:55 ` Glenn Morris
2013-12-14 10:10 ` Artem Chuprina
2013-12-14 20:19 ` Glenn Morris
2013-12-14 20:46 ` Josh
2013-12-14 20:57 ` Eli Zaretskii
2013-12-14 21:21 ` Josh
2013-12-15 3:44 ` Eli Zaretskii
2013-12-14 20:55 ` Eli Zaretskii
2013-12-14 21:07 ` Achim Gratz
2013-12-15 14:38 ` Artem Chuprina
2013-12-16 14:15 ` Stefan Monnier
2013-12-20 23:27 ` Paul Eggert
2013-12-22 0:01 ` Paul Eggert
2013-12-22 3:47 ` Eli Zaretskii
2013-12-22 4:01 ` Paul Eggert
2013-12-22 15:50 ` Artem Chuprina
2013-12-22 19:03 ` Paul Eggert
2013-12-22 20:13 ` Artem Chuprina
2013-12-23 23:58 ` Paul Eggert
2013-12-24 6:52 ` Artem Chuprina
2013-12-24 9:58 ` Andreas Schwab
2013-12-24 10:22 ` Artem Chuprina
2013-12-24 17:39 ` Paul Eggert
2013-12-24 16:51 ` Artem Chuprina
2013-12-29 18:31 ` Paul Eggert
2013-12-22 16:24 ` Eli Zaretskii
2013-12-22 17:37 ` Paul Eggert
2013-12-22 18:35 ` Eli Zaretskii
2013-12-22 18:54 ` Paul Eggert [this message]
2013-12-22 20:32 ` Artem Chuprina
2013-12-22 21:00 ` Eli Zaretskii
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