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#!/usr/bin/env python # # Check the flood control under dnotify # Scenario: the main thread watch a file, a second thread is created # writing 10 times a sec to that file, then after 5 seconds it stops # and stops modifying the file for 6 seconds. # the kernel monitoring should be stopped within one second in the # first phase and then reactivated after a few seconds in the second # phase. # Difference from flood.py is that we also monitor the directory containing # the flooded file, and check we still get notification events on that # directory when creating or removing a "b" resource in it concurrently. import shutil import os import sys import signal import gamin import time import thread
threads = 0
# create a 4k block block = '1234' i = 0 while i < 10: block = block + block i = i + 1
def wait_ms(ms = 100): delay = 0.001 delay = delay * ms time.sleep(delay)
def resource_update_thread(filename): global threads global block
threads = threads + 1 # print "%s active" % (filename) f = open(filename, "w") f.write(block) j = 0 while j < 50: wait_ms(100) j = j + 1 f.write(block) # print "%s quiet" % (filename) f.close() wait_ms(8000) threads = threads - 1 thread.exit()
ok = 1 top = 0 top2 = 0 dbg = 0 db_expect = [ 51, 53, 54, 55, 54, 55, 53, 52 ] expect = [gamin.GAMExists, gamin.GAMEndExist] expect2 = [gamin.GAMExists, gamin.GAMExists, gamin.GAMEndExist, gamin.GAMCreated, gamin.GAMDeleted]
def debug(path, type, data): global dbg, db_expect, ok
# print "Got debug %s, %s, %s" % (path, type, data) if path[-8:] != "temp_dir": print "Error got debug path unexpected %s" % (path) ok = 0 # on may see one or two bursts if dbg == 4 and type == 53: dbg = 6 if db_expect[dbg] != type: print "Error got debug event %d expected %d" % (type, db_expect[dbg]) ok = 0 dbg = dbg + 1
def callback(path, event, which): global top, expect, ok # print "Got callback: %s, %s" % (path, event) if event == gamin.GAMAcknowledge: return if top < 2: if expect[top] != event: print "Error got event %d expected %d" % (event, expect[top]) ok = 0 elif event != gamin.GAMChanged: print "Error got event %d expected %d" % (event, gamin.GAMChanged) ok = 0 top = top + 1
def callback2(path, event, which): global top2, expect2, ok # print "Got callback2: %s, %s" % (path, event) # ignore the Changed events generated by modifying a if event == gamin.GAMAcknowledge: return if event == gamin.GAMChanged: return if expect2[top2] != event: print "Error got event %d expected %d" % (event, expect2[top2]) ok = 0 top2 = top2 + 1
shutil.rmtree ("temp_dir", True) os.mkdir ("temp_dir") f = open("temp_dir/a", "w").close()
mon = gamin.WatchMonitor() mon._debug_object("notify", debug, 0) mon.watch_file("temp_dir/a", callback, 0) mon.watch_directory("temp_dir", callback2, 0) wait_ms(100) mon.handle_events()
thread.start_new_thread(resource_update_thread, ("temp_dir/a",))
# Modify the main directory while we are in flood i = 0 while i < 20: i = i + 1 wait_ms(100) mon.handle_events() # print "created b" f = open("temp_dir/b", "w").close() while i < 50: i = i + 1 wait_ms(100) mon.handle_events() mon.handle_events() os.unlink("temp_dir/b") # print "deleted b"
# wait until the thread finishes, collecting events wait_ms(100) while threads > 0: mon.handle_events() wait_ms(100)
#print "all threads terminated, exiting ..."
mon.handle_events() mon.stop_watch("temp_dir/a") mon.stop_watch("temp_dir") wait_ms(300) mon.handle_events() mon.disconnect() del mon shutil.rmtree ("temp_dir", True)
if top <= 2: print "Error: monitor got only %d events" % (top) elif top >= 28: print "Error: event flow didn't worked properly, gor %d events" % (top) elif top2 != 5: print "Error: monitor2 got %d events instead of %d" % (top2, 5) elif dbg != 8 and gamin.has_debug_api == 1: print "Error: debug got %d events insteads of 8" % (dbg) elif ok == 1: print "OK"
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