RSH sometimes hangs if it cannot resolve to a given host. So here is a quick recipe in python
Python, 46 lines
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Copy to clipboard1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | #!/usr/bin/python
import subprocess
import time
import sys
import os
from optparse import OptionParser
rsh = "/usr/bin/rsh"
def rshTimed(host, command, timeOut):
rshD = subprocess.Popen([rsh,host,command],stdout=sys.stdout,stderr=sys.stdout)
timeStart = time.time()
if(timeOut != 0):
while(1):
# Check if timeOut secs have passed since the execution of rsh
if(int(time.time() - timeStart) > int(timeOut)):
# Kill the process if timed out
rshD.kill()
break
# Check if the execution of rsh is done before the timeOut value
elif(rshD.poll() == 0):
break
# Sleep for a sec before the next loop.
time.sleep(1)
try:
# If rsh is killed then reap it
eStatus = os.waitpid(rshD.pid, 0)[1]
except:
# If rsh has been completed successfully
eStatus = rshD.returncode
return(eStatus)
if(__name__ == "__main__"):
usage = "%prog [-t TIMEOUT] hostname command"
optParser = OptionParser(usage)
optParser.add_option("-t","--timeOut",dest="timeOut",help="Timeout value for rsh in seconds",default=0,metavar="TIMEOUT")
(options, args) = optParser.parse_args()
if(len(args) < 2):
optParser.error("incorrect number of arguments")
sys.exit(1)
eStatus = rshTimed(args[0],args[1],options.timeOut)
print("\n")
sys.exit(eStatus)
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Hope someone finds this useful :)