#---------- show_services.py----------#
import re, os, string, sys

def show_opts(cmdline):
    args = string.split(cmdline)
    cmd = args[0]
    if len(args) > 1:
        opts = args[1:]
    # might want to check error output, so use popen3()
    (in_, out_, err) = os.popen3('man %s | col -b' % cmd)
    manpage = out_.read()
    if len(manpage) > 2:      # found actual documentation
        print '\n%s' % cmd
        for opt in opts:
            pat_opt = r'(?sm)^\s*'+opt+r'.*?(?=\n\n)'
            opt_doc = re.search(pat_opt, manpage)
            if opt_doc is not None:
                print opt_doc.group()
            else:             # try harder for something relevant
                mentions = []
                for para in string.split(manpage,'\n\n'):
                   if re.search(opt, para):
                       mentions.append('\n%s' % para)
                if not mentions:
                   print '\n    ',opt,' '*9,'Option docs not found'
                else:
                   print '\n    ',opt,' '*9,'Mentioned in below para:'
                   print '\n'.join(mentions)
    else:                     # no manpage available
        print cmdline
        print '    No documentation available'

def services(fname):
    conf = open(fname).read()
    pat_srv = r'''(?xm)(?=^[^#])       # lns that are not commented out
                  (?:(?:[\w/]+\s+){6}) # first six fields ignored
                  (.*$)                # to end of ln is servc launch'''
    return re.findall(pat_srv, conf)

if __name__ == '__main__':
    for service in services(sys.argv[1]):
        show_opts(service)