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Alex Rivera
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I have a python script that I want to only allow to be running once on a machine. I want it to print something like "Error, already running" if it is already running, whether its running in the background or in a different ssh session. How would I do this? Here is my script. import urllib, urllib2, sys num = sys.argv[1] print 'Calling' phones = [ 'http://phone1/index.htm', 'http://phone2/index.htm', 'https://phone3/index.htm', 'https://phone4/index.htm', 'https://phone5/index.htm' ] data = urllib.urlencode({"NUMBER":num, "DIAL":"Dial", "active_line":1}) while 1: for phone in phones: try: urllib2.urlopen(phone,data) # make call urllib2.urlopen(phone+"?dialeddel=0") # clear logs except: pass P.S I am using CentOS 5 if that matters.
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