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+# -*- python -*-
+'''
+xpybar – xmobar replacement written in python
+Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+'''
+
+
+class Files:
+ '''
+ Data from /proc/sys/fs/file-nr
+
+ @variable nr_files:int The number of allocated file handles, i.e.,
+ the number of files presently opened
+ @variable nr_free_files:int The number of free file handles
+ @variable file_max:int The maximum number of file handles
+
+ If the number of allocated file handles is close to the maximum,
+ you should consider increasing the maximum. Before Linux 2.6, the
+ kernel allocated file handles dynamically, but it didn't free them
+ again. Instead the free file handles were kept in a list for
+ reallocation; the "free file handles" value indicates the size of
+ that list. A large number of free file handles indicates that there
+ was a past peak in the usage of open file handles. Since Linux 2.6,
+ the kernel does deallocate freed file handles, and the "free file
+ handles" value is always zero.
+ '''
+
+
+ def __init__(self):
+ '''
+ Constructor
+ '''
+ state = None
+ with open('/proc/sys/fs/file-nr', 'rb') as file:
+ state = file.read()
+ state = state.decode('utf-8', 'replace').replace('\t', ' ')
+ state = [int(field) for field in state.split(' ') if not field == '']
+ (self.nr_files, self.nr_free_files, self.file_max) = state
+