Here you find a quick fix for a wordpress problem i found nowhere written:
I have a wordpress instance running on shared hosting which requires having group read bit set in permissions of uploaded files to be readable by the web server. But uploaded files were set to
0600 instead of
0640 and were thus not viewable on the website.
First i tried setting
FS_CHMOD_FILE but this didn’t work as it is not used for uploaded files.
Then i found that wordpress determines the permission bits of uploaded files by taking the permissions of the target directory and if needed the parent directory of it and removing the execution bits. So to solve the problem just set the permissions of
wp-content/uploads and all sub directories to
0750. This way wordpress sets file permissions for uploads to
0640 as required.