Commit 1b4aa4cf753833b21f55b0c191e900b9018c5637
1 parent
abc758a9df
Exists in
master
init
Showing 1 changed file with 61 additions and 0 deletions
pytail.py
View file @
1b4aa4c
| 1 | +#!/usr/bin/env python3 | |
| 2 | + | |
| 3 | +import re, os, time, sys | |
| 4 | +from time import time, sleep | |
| 5 | +from os.path import join, getsize, getmtime | |
| 6 | + | |
| 7 | +if len(sys.argv) == 1: | |
| 8 | + print("Argument Missing !") | |
| 9 | + print("Usage:\n {0:s} /path/to/log/file".format(sys.argv[0])) | |
| 10 | + sys.exit(1) | |
| 11 | + | |
| 12 | +startTime = time() | |
| 13 | +mTimeStart = 0 | |
| 14 | +fileName = sys.argv[1] | |
| 15 | + | |
| 16 | +if not os.path.exists(fileName) or not os.path.isfile(fileName): | |
| 17 | + print("This file '{0:s}' does not exist !".format(fileName)) | |
| 18 | + sys.exit(2) | |
| 19 | + | |
| 20 | +try: | |
| 21 | + with open(fileName, 'r') as f: | |
| 22 | + f.read(1) | |
| 23 | +except Exception as e: | |
| 24 | + print("This file '{0:s}' cannot be opened for reading !".format(fileName)) | |
| 25 | + sys.exit(3) | |
| 26 | + | |
| 27 | +folderLogs = os.path.dirname(fileName) | |
| 28 | + | |
| 29 | +copyLines = [] | |
| 30 | + | |
| 31 | +try: | |
| 32 | + | |
| 33 | + while True: | |
| 34 | + with open(fileName, 'r') as f: | |
| 35 | + lines = f.readlines() | |
| 36 | + | |
| 37 | + show = False | |
| 38 | + | |
| 39 | + if len(copyLines) == 0: | |
| 40 | + showLines = lines[-10:] | |
| 41 | + show = True | |
| 42 | + | |
| 43 | + elif len(copyLines) != len(lines): | |
| 44 | + showLines = lines[len(copyLines) - len(lines):] | |
| 45 | + show = True | |
| 46 | + | |
| 47 | + if show: | |
| 48 | + copyLines = lines.copy() | |
| 49 | + for line in showLines: | |
| 50 | + print(line, end='') | |
| 51 | + | |
| 52 | + sleep(1) | |
| 53 | + | |
| 54 | +except KeyboardInterrupt as e: | |
| 55 | + print("Program stopped by user !") | |
| 56 | + sys.exit(0) | |
| 57 | + | |
| 58 | +except Exception as e: | |
| 59 | + print("Unknown error during execution !") | |
| 60 | + print(e) | |
| 61 | + sys.exit(4) |