Question

I am trying to execute the following code in Python

import os,subprocess
from glob import glob

path = "/Users/armed/private_SDKs"
os.chdir(path)

for file in glob("*.framework"):
     command = ['class-dump' , '-H' , file , '-o' , '~', '/Users/armed/Desktop/Headers/']
     subprocess.call(command)

On executing this script i get the following error :-

Traceback (most recent call last):
  File "<pyshell#52>", line 3, in <module>
    subprocess.call(command)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 493, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 679, in __init__
    errread, errwrite)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1228, in _execute_child
    raise child_exception
OSError: [Errno 13] Permission denied

Any help is much appreciated !

Answer 1

Check permissions of the class-dump command. chmod +x class-dump if it’s not executable. Here are the docs on chmod.

You might also need to specify the absolute path to class-dump if it’s not on your path.

Also, try:

print " ".join(command)

and see if you can run it by pasting the results into a shell.