Module to lock open files using fcntl()

diff --git a/Lib/lib-old/lockfile.py b/Lib/lib-old/lockfile.py
new file mode 100644 (file)
index 0000000..3a251d7
--- /dev/null
+++ b/Lib/lib-old/lockfile.py
@@ -0,0 +1,15 @@
+import struct, fcntl, FCNTL
+
+def writelock(f):
+       _lock(f, FCNTL.F_WRLCK)
+
+def readlock(f):
+       _lock(f, FCNTL.F_RDLCK)
+
+def unlock(f):
+       _lock(f, FCNTL.F_UNLCK)
+
+def _lock(f, op):
+       dummy = fcntl.fcntl(f.fileno(), FCNTL.F_SETLKW,
+                           struct.pack('2h8l', op,
+                                       0, 0, 0, 0, 0, 0, 0, 0, 0))

diff --git a/Lib/lockfile.py b/Lib/lockfile.py
new file mode 100644 (file)
index 0000000..3a251d7
--- /dev/null
+++ b/Lib/lockfile.py
@@ -0,0 +1,15 @@
+import struct, fcntl, FCNTL
+
+def writelock(f):
+       _lock(f, FCNTL.F_WRLCK)
+
+def readlock(f):
+       _lock(f, FCNTL.F_RDLCK)
+
+def unlock(f):
+       _lock(f, FCNTL.F_UNLCK)
+
+def _lock(f, op):
+       dummy = fcntl.fcntl(f.fileno(), FCNTL.F_SETLKW,
+                           struct.pack('2h8l', op,
+                                       0, 0, 0, 0, 0, 0, 0, 0, 0))