white screen if webserver has no read access to config.php

[adsworth]

Steps to reproduce

1. make sure that config.php is neither readable nor writable by Nextcloud.

Expected behaviour

Nextcloud should complain that it has no access to the config.php

Actual behaviour

no data is returned. the browser page is completely white and there is no html source returned.

Server configuration

Operating system:
Ubuntu
Web server:
Apache
Database:
MySQL
PHP version:
7
Nextcloud version: (see Nextcloud admin page)
9
Updated from an older Nextcloud/ownCloud or fresh install:
update from OC 8.2.5
Where did you install Nextcloud from:
manual install from zip file

List of activated apps:
Enabled:

• activity: 2.2.1
• admin_audit: 1.0.0
• bookmarks: 0.7
• calendar: 1.2.2
• comments: 0.2
• contacts: 1.3.1.0
• dav: 0.1.6
• federatedfilesharing: 0.1.0
• federation: 0.0.4
• files: 1.4.4
• files_pdfviewer: 0.8.1
• files_sharing: 0.9.1
• files_texteditor: 2.1
• files_trashbin: 0.8.0
• files_versions: 1.2.0
• files_videoplayer: 0.9.8
• firstrunwizard: 1.1
• gallery: 14.5.0
• notifications: 0.2.3
• provisioning_api: 0.4.1
• systemtags: 0.2
• templateeditor: 0.1
• updatenotification: 0.1.0
  Disabled:
• encryption
• external
• files_external
• user_external
• user_ldap

The content of config/config.php:

{
"system": {
"instanceid": "oc80d864d4c2",
"passwordsalt": "_REMOVED SENSITIVE VALUE",
"datadirectory": "/mnt/data/oc_data",
"dbtype": "mysql",
"version": "9.0.50.0",
"dbname": "oc",
"dbhost": "localhost",
"dbtableprefix": "oc",
"dbuser": "_REMOVED SENSITIVE VALUE",
"dbpassword": "_REMOVED SENSITIVE VALUE",
"installed": true,
"logfile": "/home/oc/logs/owncloud.log",
"forcessl": false,
"theme": "",
"maintenance": false,
"trusted_domains": [
""_REMOVED SENSITIVE VALUE"",
],
"share_folder": "/Shared",
"loglevel": "1",
"secret": "_REMOVED SENSITIVE VALUE",
"mail_from_address": ""_REMOVED SENSITIVE VALUE"",
"mail_smtpmode": "php",
"mail_domain": ""_REMOVED SENSITIVE VALUE"",
"asset-pipeline.enabled": false,
"filesystem_check_changes": 0,
"trashbin_retention_obligation": "auto"
}
}
Are you using external storage, if yes which one: local/smb/sftp/...
No

Are you using encryption: yes/no
No

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
No

Client configuration

Browser:
Firefox
Operating system:
Linux

[MorrisJobke]

I will test this tomorrow.

[adsworth]

in IRC @BernhardPosselt told me this is standard behaviour of PHP if something goes really wrong. So maybe there is nothing we can do about it, but if there is it'd be great. Since nothing is logged in the owncloud.log nor in the apache error.log and if no php log is defined or the user doesn't have access to it then it is really hard to track down the first time. So even if there is nothing we can do about it a note in the docs would be nice.

[MorrisJobke]

I got this, when I set the config/config.php to read-only. Could you provide the permissions of the config folder and the file config.php in that folder?

(It's german that says, that the permissions are wrong)

[MorrisJobke]

If the config folder itself is not writeable then it shows this warning:

[adsworth]

remove the read right as well.
-rw----r-- 1 oc www-data 962 Jun 21 08:09 config.php

my apache runs as www-data.

[MorrisJobke]

ah .. reproducible now :) I will try to fix this.

[adsworth]

I did write "..make sure that config.php is neither readable nor writable ..." :)

[MorrisJobke]

I did write "..make sure that config.php is neither readable nor writable ..." :)

Sorry. I haven't red that :(

[MorrisJobke]

Fix is in #185