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copy() target is blank in PHP 8.2.0-rc3 #9653
Description
Description
The following code:
<?php
copy("test.txt", "testcopy.txt");Resulted in this output:
testcopy.txt is an empty 0 bytes file.
But I expected this output instead:
testcopy.txt is a copy of test.txt
The following workaround is working:
<?php
file_put_contents("testcopy.txt", file_get_contents("test.txt"));This problem exists at least since PHP 8.2.0-rc1. Production versions such as PHP 8.1.11 are working as expected. I am using Debian 10 with the packages provided by https://deb.sury.org running in a VirtualBox machine.
PHP Version
PHP 8.2.0-rc3
Operating System
Debian 10
Activity
devnexen commentedon Oct 1, 2022
I built the same environment but was unable to reproduce the issue, always successful copies. Is it possible to get a bit more context or a minimum reproducer ?
pesselbach commentedon Oct 2, 2022
I did further testing. This only happens if the target directory is in a VirtualBox shared folder.
devnexen commentedon Oct 2, 2022
Thanks. It might have to do with the copy optimisation introduced couple of months ago and we re running a kernel version pre-5.3. Indeed, when I boot with the other buster kernel image 5.10, the copy seems to work.
devnexen commentedon Oct 2, 2022
@pesselbach you can try the aforementioned PR branch, the copy worked again on the base 4.19 kernel image with this change.
bukka commentedon Oct 6, 2022
@devnexen Added few comments on one of the commits - not sure if it's visible. Maybe just do a PR. It seems reasonable to me to do this check if it doesn't work well before 5.3 kernel.
devnexen commentedon Oct 6, 2022
PR is there ;-) but yes I did see your comments thx
Fix phpGH-9653: does not inconditionally support copy_file_range on o…