Edit report at https://bugs.php.net/bug.php?id=60110&edit=1
ID: 60110
Comment by: scottix at gmail dot com
Reported by: tom at punkave dot com
Summary: fclose(), file_put_contents(), copy() do not return
false properly
Status: Open
Type: Bug
Package: Filesystem function related
Operating System: all
PHP Version: 5.3.8
Block user comment: N
Private report: N
New Comment:
Still a bug
PHP 5.4.14 (cli) (built: May 5 2013 12:09:08)
I am using gluster to write to a file and then in the middle of the write I
perform a unplug power shutoff. Gluster goes into lock mode which is good, what
it is supposed to do. Although php doesn't seem to do the right thing, I did a
strace of the fclose and you can clearly see a -1 is sent, but php is ignoring
it.
//Gluster shut off and gluster mount log shows volume down
//fwrite here although can succeed since it buffers
write(3, "Some Text 2", 11) = 11
write(1, "int(11)\n", 8int(11)
) = 8
// Performed fflush(), not sure about this one
write(1, "bool(true)\n", 11bool(true)
) = 11
// Performed fclose() here
close(3) = -1 ENOTCONN (Transport endpoint is
not
connected)
write(1, "bool(true)\n", 11bool(true)
Please make this higher priority.
Previous Comments:
------------------------------------------------------------------------
[2012-08-20 05:38:22] [email protected]
This looks like a bug, I think it'd be fine to have the fix in 5.4. Any pull
reqs
with fixes?
------------------------------------------------------------------------
[2011-12-30 17:25:04] [email protected]
fclose() calls php_stream_close since PHP 5.4, see
http://svn.php.net/viewvc?view=revision&revision=309491
------------------------------------------------------------------------
[2011-12-29 04:45:53] [email protected]
It would be nice if the return value of php_stream_close() was checked, but
note that fclose() does not call php_stream_close(), it calls
zend_list_delete(), which can't return anything sensible because
rsrc_dtor_func_t returns void.
It would be ugly and difficult to change rsrc_dtor_func_t at this stage, and in
any case, during shutdown or zval destruction we don't really care about flush
failures. I think the way to go would be to call php_stream_close() from
fclose() before calling the resource destructor. There probably won't be any
dangling pointers, it looks pretty well guarded already.
As for cataphract's concern: we could audit all the wrapper close functions,
there's not that many of them is there?
------------------------------------------------------------------------
[2011-10-24 17:05:00] tom at punkave dot com
How about a close_checks_flush php.ini flag which defaults to false in 5.3 and
to
true in 5.4?
------------------------------------------------------------------------
[2011-10-21 21:35:52] tom at punkave dot com
This can definitely happen with the regular stdio stuff. stdio employs
buffering
as a matter of course. It is a serious bug, not a change in behavior.
As for stream wrappers, the documentation specifies what stream_flush is
supposed to return, and fflush() would already be failing for people with bad
stream wrappers who did not heed that documentation.
stream_close is not supposed to return anything but is not affected by this bug
because stream_flush has already been called (and cheerfully ignored) before
stream_close is called (I checked).
So there is no need to change the behavior of stream_close (which would be a bc
break). We just need to pay attention to what stream_flush is already telling
us.
------------------------------------------------------------------------
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