shmtop: New tool to show who uses /dev/shm the most

shmtop

+#!/usr/bin/python
+import errno, os, pwd
+os.chdir('/proc')
+z = []
+for p in os.listdir('.'):
+  try:
+    pid = int(p)
+  except ValueError:
+    continue
+  n = 0
+  x = p + '/fd'
+  try:
+    for y in os.listdir(x):
+      y = x + '/' + y
+      if os.readlink(y).startswith('/dev/shm/'):
+        y = os.open(y, 0)
+        try:
+          n += os.fstat(y).st_blocks
+        finally:
+          os.close(y)
+  except OSError, e:
+    if e.errno != errno.ENOENT:
+      raise
+  if n:
+    try:
+      with open(p + '/status') as x:
+        x = dict(x.split(':', 1) for x in x)
+    except IOError, e:
+      if e.errno != errno.ENOENT:
+        raise
+      continue
+    uid = map(int, x['Uid'].split())
+    z.append((pwd.getpwuid(uid[0]).pw_name, x['Name'].strip(), pid, n))
+z.sort(key=lambda x: x[3])
+from pprint import pprint as pp
+pp(z)