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authorMattias Andrée <maandree@operamail.com>2015-04-02 15:51:16 +0200
committerMattias Andrée <maandree@operamail.com>2015-04-02 15:51:16 +0200
commiteff0a9ee9693181b1f844566274029a172f8e57b (patch)
treef20610368fb83d63498389e8bd0b2457a5879991 /examples
parentadd swaps plugin (diff)
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add locks plugin
Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to 'examples')
-rw-r--r--examples/plugins/locks83
1 files changed, 83 insertions, 0 deletions
diff --git a/examples/plugins/locks b/examples/plugins/locks
new file mode 100644
index 0000000..b24f870
--- /dev/null
+++ b/examples/plugins/locks
@@ -0,0 +1,83 @@
+# -*- python -*-
+
+# A xpybar configuration example testing the features of plugins.locks
+
+import time
+import threading
+
+from plugins.locks import Locks
+
+
+OUTPUT, HEIGHT, YPOS, TOP = 0, 12, 24, True
+
+
+locks = Locks().locks
+headers = ('Id', 'Syscall', 'Level', 'Shared', 'Pid', 'Device', 'Inode', 'Range', 'Mountpoint', 'Pathname')
+def convert(lock):
+ rc = []
+ rc.append(str(lock.lock_id))
+ rc.append({'FLOCK' : 'flock', 'POSIX' : 'lockf'}[lock.lock_type])
+ rc.append('mandatory' if lock.mandatory else 'advisory')
+ rc.append('yes' if lock.shared else 'no')
+ rc.append(str(lock.pid))
+ rc.append('%i:%i' % (lock.major, lock.minor))
+ rc.append(str(lock.inode))
+ rc.append('%i..%s' % (lock.start, 'eof' if lock.end is None else str(lock.end)))
+ rc += ['...'] * 2
+ return rc
+text_locks = [convert(lock) for lock in locks]
+
+HEIGHT *= len(text_locks)
+
+
+def locate_files():
+ dev_cache = {}
+ for i, lock in enumerate(locks):
+ if (lock.major, lock.minor) in dev_cache:
+ mountpoint, device = dev_cache[(lock.major, lock.minor)]
+ text_locks[i][-2] = mountpoint
+ text_locks[i][5] = '%s(%s)' % (text_locks[i][5], device)
+ else:
+ device = lock.find_device()
+ mountpoint = device[1] if device is not None else '(not found)'
+ device = device[2] if device is not None else None
+ dev_cache[(lock.major, lock.minor)] = (mountpoint, device)
+ text_locks[i][-2] = mountpoint
+ if device is not None:
+ text_locks[i][5] = '%s(%s)' % (text_locks[i][5], device)
+ if not mountpoint.startswith('/'):
+ text_locks[i][-1] = '(not found)'
+ try:
+ with open('/proc/%i/comm' % lock.pid, 'rb') as file:
+ cmd = file.read()
+ cmd = cmd.decode('utf-8', 'replace')[:-1]
+ text_locks[i][4] = '%s(%s)' % (text_locks[i][4], cmd)
+ except:
+ pass
+ bar.invalidate()
+ for i, lock in enumerate(locks):
+ mountpoint = text_locks[i][-2]
+ if not mountpoint.startswith('/'):
+ continue
+ pathnames = lock.find_pathname(mountpoint)
+ if len(pathnames) == 0:
+ text_locks[i][-1] = '(not found)'
+ else:
+ text_locks[i][-1] = pathnames[0]
+ bar.invalidate()
+
+
+start_ = start
+def start():
+ start_()
+ async(locate_files)
+
+
+semaphore = threading.Semaphore()
+def redraw():
+ semaphore.acquire(blocking = True)
+ text = '\n'.join(' │ '.join('%s: %s' % (h, v) for (h, v) in zip(headers, lock)) for lock in text_locks)
+ bar.clear()
+ bar.draw_coloured_text(0, 10, 0, 2, text)
+ semaphore.release()
+