I have a simple script to tail a log file for an error string, it
works AOK but there is an unexpected side effect, when I run it in a
shell.
if I
echo "ERROR TEST" >> LOG
in a separate shell, I get the following from the script
ERROR TEST
GOT YA :)
ERROR TEST
So it looks like I am getting stdout from the tail -f, and two copies
of it ?, stdout should be piped to subprocess.stdout
tail = subprocess.Popen(['tail', '-f', LOG_FILE], shell=False,
stdout=subprocess.PIPE)
for out in iter(tail.stdout.readline, ''):
out_str = out.rstrip('\n')
if out_str.find('ERROR') != -1:
print 'GOT YA :)'
time.sleep(1)
Any ideas anyone ?
Cheers
Dave
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