Temporary hack for iOS: open files read-only if read-write open fails

Change-Id: Ifc400d9843b23ef942c43af3a2b8830ccff71a7e

sal/osl/unx/file.cxx

@@ -911,6 +911,18 @@ SAL_CALL osl_openFilePath( const char *cpFilePath, oslFileHandle* pHandle, sal_u
 
     /* open the file */
     int fd = open( cpFilePath, flags, mode );
+#ifdef IOS
+    /* Horrible hack: If opening for RDWR and getting EPERM, just try
+     * again for RDONLY. Quicker this way than to figure out why
+     * we get that oh so useful General Error when trying to open a
+     * read-only document.
+     */
+    if (-1 == fd && (flags & O_RDWR) && EPERM == errno)
+    {
+        int rdonly_flags = (flags & ~O_ACCMODE) | O_RDONLY;
+        fd = open( cpFilePath, rdonly_flags, mode );
+    }
+#endif
     if (-1 == fd)
     {
         int saved_errno = errno;