#!/usr/bin/env python3
 
import errno
import os
import sys
 
locations = [ '/etc/pki/tls/certs/ca-bundle.crt',
    '/etc/ssl/certs/ca-certificates.crt',
    '/etc/ssl/ca-bundle.pem'
]
 
if len(sys.argv) > 1:
    locations.insert(0, sys.argv[1])
 
for location in locations:
  if os.path.isfile(location):
    sys.stdout.write(location)
    sys.exit(0)
 
sys.exit(errno.ENOENT)