On Fri, Sep 3, 2021 at 4:24 PM Nikita Popov <[email protected]> wrote:
> Just to throw it out there: Maybe we should clear the stat cache when
> functions in the exec family are used? Even if we allow disabling the stat
> cache, I think we can easily avoid that particular footgun. And if calls to
> external binaries are involved we likely don't have to worry about stat
> overhead.
This code also breaks:
<?php
$testfile= 'bug28790.write.out';
function print_stat($filename) {
$s = @stat($filename);
echo "$filename: ".$s['size']."\n";
}
$f = fopen($testfile, "a");
print_stat($testfile);
fwrite($f, "five\n");
print_stat($testfile);
fclose($f);
So you'd need to add fwrite and a number of other functions to the ones managing
this cache. And after all that, external programs (or forked children)
can ruin your
day. One could argue that making a bug more arcane is a form of cruelty.
Kevin
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