retitle 494112 File::Copy::move truncates open file when rename fails
reassign 494112 perl-modules
thanks
On 2008-08-07 14:26:07 +0200, Vincent Lefevre wrote:
> The size of the truncated file appears here. If I understand correctly,
> the failed rename has truncated the configure.tmp file.
It wasn't truncated, but copied without being flushed first.
The problem comes from:
if ($atomic_replace && !rename("$output.tmp", "$output")) {
move ("${output}.tmp", "$output")
or fatal "cannot rename ${output}.tmp as $output: $!";
}
in /usr/bin/autom4te. File::Copy::move tries to do a "rename" first.
If the system call succeeds, no problem. But if it fails (such as with
sshfs[*]), the file gets truncated.
[*] cache=no doesn't matter, but if "sshfs -o workaround=all" is used,
the rename succeeds and the renamed file is OK.
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Vincent Lefèvre <[EMAIL PROTECTED]> - Web: <http://www.vinc17.org/>
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Work: CR INRIA - computer arithmetic / Arenaire project (LIP, ENS-Lyon)
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