to get command ouput from ns-3-dce sim node stdout

cgrep.py

#!/usr/bin/env python
# cgrep, dce cmdline grep


import re
import os
import sys

e_flag = False
s_flag = True


def cgrep (files, cmdline) :

    plist = os.listdir (files + "/var/log")

    for p in plist :

        if not re.match (r'\d+', p) :
            continue

        cmdpath = files + "/var/log/" + p + "/cmdline"
        cmd = open (cmdpath, 'r').read ()
        cmd = cmd.strip ()

        if re.search (cmdline, cmd) :


            if e_flag : 
                outpath = files + "/var/log/" + p + "/stderr"
            else :
                outpath = files + "/var/log/" + p + "/stdout"                

            print
            print "COMMAND: " + cmdpath + "\t" + cmd
            print "OUTPUT : " + outpath
            print open (outpath, 'r').read (),
    



def main () :

    cmdline = sys.argv.pop ()

    for files in sys.argv :
        cgrep (files, cmdline)
        

# remove cgre.py 
sys.argv.pop (0)

if sys.argv[len(sys.argv) - 1] == "-e" :
    e_flag = True
    sys.argv.pop ()

if sys.argv[len(sys.argv) - 1] == "-s" :
    e_flag = False
    s_flag = True
    sys.argv.pop ()

main ()