python でログ監視
#-*- coding: utf-8 -*-
# src: https://qiita.com/hidetzu/items/dd51ea30758bd4c8e521
import time
import os
import sys
from stat import *
def usage():
print("Usage: # python %s filename" % argv[0])
quit()
def init(filename):
file = open(filename,'r')
#ファイル末尾へ移動
st_results = os.stat(filename)
st_size = st_results[ST_SIZE]
file.seek(st_size)
return file
def tail_f(file, usec):
msec = usec / 1000
while 1:
fpos = file.tell()
line = file.readline()
if not line:
time.sleep(msec)
file.seek(fpos)
else:
print(line),
# 未到達
file.close()
pass
if __name__ == '__main__':
argv = sys.argv
argc = len(argv)
if( argc != 2 ):
usage()
filename = argv[1]
file = init(filename)
tail_f(file, 500)