After installing and configuring cacherouter+xcache, I started getting these groups of errors in dblog:

fopen() [function.fopen]: SAFE MODE Restriction in effect. The script whose uid is X is not allowed to access /tmp owned by uid 0 in file [snip]/sites/all/modules/cacherouter/Cache.php on line 110
fopen(/tmp/prefix-cache_menu_lock) [function.fopen]: failed to open stream: Success in file [snip]/sites/all/modules/cacherouter/Cache.php on line 110.
flock() expects parameter 1 to be resource, boolean given in file [snip]/sites/all/modules/cacherouter/Cache.php on line 111.
unlink() [function.unlink]: SAFE MODE Restriction in effect. The script whose uid is X is not allowed to access /tmp owned by uid 0 in file [snip]/sites/all/modules/cacherouter/Cache.php on line 124.

Attached is a patch to README.txt which explains how to fix the problem I had.

CommentFileSizeAuthor
#2 readme_txt-2.patch2.58 KBtetramentis
readme_txt.patch2.57 KBtetramentis

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tetramentis’s picture

tetramentis commented
Status: Active » Needs review
tetramentis’s picture

tetramentis commented
StatusFileSize
new readme_txt-2.patch2.58 KB

I got a slightly better patch (attached) thanks to #945650: suggestions for settings.php.

andypost’s picture

andypost
he/him
Primary language Russian
commented 
+++ README.txt.new	2010-11-23 11:21:49.000000000 +0200
@@ -41,6 +41,7 @@
+    // 'lock_dir' => getcwd() . '/sites/' . $_SERVER['SERVER_NAME'] . '/files/filecache',

getcwd() and $_SERVER['SERVER_NAME'] could be wrong in case multisite.

So I propose to use same string as for 'path'. Users can replace this paths with values by their own

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tetramentis’s picture

tetramentis commented

Then maybe my original string would be better than just copying 'path', as it contains a hint to make path absolute:
'lock_dir' => '/absolute/path/to/your/sites/default/files/filecache',

I have tested that in a multisite install and it did work for me, but my multisite might not be what others are using: I'm using DocumentRoot directives for several sites to point at a single Drupal directory.

This is a minor convenience point so generally I don't mind using a simpler string with no code/variables in it.