add files

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/src/plugins/files.py b/src/plugins/files.py
new file mode 100644
index 0000000..a1d5638
--- /dev/null
+++ b/src/plugins/files.py
@@ -0,0 +1,52 @@
+# -*- 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
+