Re: [Tutor] subprocess not returning
On Tue, Apr 22, 2014 at 3:10 PM, Alan Gauld wrote: > We have no clue what you are doing. You say "this works" > but we can't see what 'this' is. Is the code on the > pastebin link the working or the broken version? > Per what is expected output (which I forgot to provide - sorry about that). Should be something like this: [ ['/testroot', '0', '0', '777'], ['/bin/dash', 0, 0, '755'], ['/lib/x86_64-linux-gnu/libc.so.6', '0', '0', '777'], ['/lib64/ld-linux-x86-64.so.2', '0', '0', '777'], ['/lib/x86_64-linux-gnu/libc-2.17.so', '0', '0', '755'], ['/lib/x86_64-linux-gnu/ld-2.17.so', '0', '0', '755'] ] Ie, find libraries a program is linked against (just try ldd against any file because I'm not caring about optimizing at this point) and then find the permissions of them and follow symlinks and do the same. Though, what I'm asking specifically is why __ldd isn't returning any values in my module. The best I can simplify to show the part working that should also be working in the gist code is: import subprocess import sys import pprint pp = pprint.PrettyPrinter(indent=4) class T: def ldd(filename): libs = [] for x in filename: p = subprocess.Popen(["ldd", x], universal_newlines=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) for line in p.stdout: s = line.split() pp.pprint(s) if "=>" in s: if len(s) == 3: # virtual library continue else: libs.append(s[2]) else: if len(s) == 2: libs.append(s[0]) return libs if __name__ == "__main__": t = T fattr = [ '/bin/dash' ] pp.pprint(["OUT", t.ldd(fattr)]) Past this, I can see that the ldd method is being called in my actual code but nothing is being returned from it like it is here. > It's also a very long listing. Can you produce a shorter > example, perhaps with hard coded values that exhibits > the problem? I really did try to simplify t.py (where all of the data is included in the script). I guess the reason for my question is because I'm not sure what's not working or what to try next? ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] subprocess not returning
On 22/04/14 10:14, shawn wilson wrote: This works when I have a class for ldd and nothing else, but when I run it like this: https://gist.github.com/ag4ve/11171201 I don't get any of the libraries and I can't figure out where it's failing. ['fattr', [['/testroot', 0, 0, 777], ['/bin/dash']]] HERE1 [/testroot] HERE2 [/bin/dash] ['ldd', ['/lib/x86_64-linux-gnu/libc.so.6', '/lib64/ld-linux-x86-64.so.2']] HERE2 [/lib/x86_64-linux-gnu/libc.so.6] ['ldd', ['/lib64/ld-linux-x86-64.so.2']] HERE2 [/lib64/ld-linux-x86-64.so.2] ['ldd', ['statically']] HERE1 [statically] HERE2 [/lib64/ld-linux-x86-64.so.2] ['ldd', ['statically']] HERE1 [statically] [ 'filelist', [['/testroot', 0, 0, 777], ['/bin/dash', 0, 0, '755'], [[[]], [ Obviously it's returning something - but no usable info. We have no clue what you are doing. You say "this works" but we can't see what 'this' is. Is the code on the pastebin link the working or the broken version? It's also a very long listing. Can you produce a shorter example, perhaps with hard coded values that exhibits the problem? HTH -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.flickr.com/photos/alangauldphotos ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
[Tutor] subprocess not returning
This works when I have a class for ldd and nothing else, but when I run it like this: https://gist.github.com/ag4ve/11171201 I don't get any of the libraries and I can't figure out where it's failing. ['fattr', [['/testroot', 0, 0, 777], ['/bin/dash']]] HERE1 [/testroot] HERE2 [/bin/dash] ['ldd', ['/lib/x86_64-linux-gnu/libc.so.6', '/lib64/ld-linux-x86-64.so.2']] HERE2 [/lib/x86_64-linux-gnu/libc.so.6] ['ldd', ['/lib64/ld-linux-x86-64.so.2']] HERE2 [/lib64/ld-linux-x86-64.so.2] ['ldd', ['statically']] HERE1 [statically] HERE2 [/lib64/ld-linux-x86-64.so.2] ['ldd', ['statically']] HERE1 [statically] [ 'filelist', [['/testroot', 0, 0, 777], ['/bin/dash', 0, 0, '755'], [[[]], [ Obviously it's returning something - but no usable info. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
