Source/WebKit/Shared/Sandbox/preferences.sb

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(define (home-library-preferences-regex home-library-preferences-relative-regex)
    (regex (string-append "^" (regex-quote (param "HOME_LIBRARY_PREFERENCES_DIR")) home-library-preferences-relative-regex)))

(define (home-library-preferences-literal home-library-preferences-relative-literal)
    (literal (string-append (param "HOME_LIBRARY_PREFERENCES_DIR") home-library-preferences-relative-literal)))

(define (shared-preferences-read . domains)
    (for-each (lambda (domain)
        (begin
            (allow user-preference-read (preference-domain domain))
            (allow file-read*
                (literal (string-append "/Library/Preferences/" domain ".plist"))
                (home-library-preferences-literal (string-append "/" domain ".plist"))
                (home-library-preferences-regex (string-append #"/ByHost/" (regex-quote domain) #"\..*\.plist$")))))
        domains))

(define (allow-reading-global-preferences)
    (allow user-preference-read (preference-domain "kCFPreferencesAnyApplication"))
#if ENABLE(CFPREFS_DIRECT_MODE)
    (allow file-read*
        (literal "/Library/Preferences/.GlobalPreferences.plist")
        (home-subpath "/Library/Preferences/.GlobalPreferences.plist")
        (home-subpath "/Library/Preferences/.GlobalPreferences_m.plist")
        (home-regex #"/Library/Preferences/ByHost/\.GlobalPreferences\..*\.plist$")
    )
#endif
)