Edit report at https://bugs.php.net/bug.php?id=60666&edit=1
ID: 60666
Comment by: 7eggert at gmx dot de
Reported by: hunter at yessoftware dot com
Summary: scandir doesn''t return entries on GlusterFS
(redHat's) file system
Status: Open
Type: Bug
Package: Directory function related
Operating System: CentOS 5.7
PHP Version: 5.3.8
Block user comment: N
Private report: N
New Comment:
I experienced the same or something similar with mergerfs. While scandir() or readdir report not
even "." and "..", but () and false. stracing the apache process with the
PHP7.3.10 of openSUSE Tumbleweed, shows the call to getdents64.
Using glob() does return a nonempty array.
Previous Comments:
------------------------------------------------------------------------
[2012-01-10 13:18:42] hunter at yessoftware dot com
I solved it by rebuilding php with
export CPPFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
./configure
------------------------------------------------------------------------
[2012-01-07 12:36:17] hunter at yessoftware dot com
PHP strace:
10458 open("/sites/cache", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
10458 fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
10458 getdents(3, 0x9d0640c, 32768) = -1 EINVAL (Invalid argument)
10458 close(3) = 0
10458 write(1, "0\r\n", 3) = 3
10458 open("/nonglustered/dir", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
10458 fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
10458 getdents(3, 0x9d0640c, 32768) = 120
10458 getdents(3, 0x9d0640c, 32768) = 0
10458 close(3) = 0
10458 write(1, "3\r\n", 3) = 3
10458 close(0) = 0
Perl strace
open("/sites/other", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
brk(0x8608000) = 0x8608000
getdents64(3, /* 24 entries */, 32768) = 1352
write(1, "12548855754ef9fb85723261.9149936"..., 38) = 38
So goal is to use getdents64 instead of getdents.
The original Linux getdents() system call did not handle large file systems and large file offsets.
Consequently, Linux 2.4 added getdents64(), with wider types for the d_ino and d_off fields employed
in the linux_dirent structure.
------------------------------------------------------------------------
[2012-01-05 22:13:27] hunter at yessoftware dot com
Description:
------------
When I'm trying to scandir or opendir/readdir on GlusterFS Distributed volumes (mounted to some
folder) I got something but not I'm expecting to obtainan: empty array even without . and ..
entries, only . entry, 2-3 entries instead of >100 and so on.
Other ways (bash ls or perl opendir) works correctly.
for example:
distributed GlusterFS volume mounted to /sites/blog folder.
scandir("/sites/blog");
array(0) {
}
distributed GlusterFS volume mounted to /sites/other folder:
scandir("/sites/other");
array(1) {
[0]=>
string(1) "."
}
scandir("/sites/other/old");
array(3) {
[0]=>
string(1) "."
[1]=>
string(11) "1.2.0.2540"
[2]=>
string(11) "1.5.0.2559"
}
Test script:
---------------
<?php
clearstatcache();
var_dump(scandir('/sites/blogs'));
var_dump(scandir('/sites/other'));
var_dump(scandir('/sites/other/ms'));
?>
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=60666&edit=1