Add pwndbg config command to dump configuration values

pwndbg> set emulate off
Set Unicorn emulation of code near the current instruction to False
pwndbg> config
Name                 Value (Def)     Documentation
--------------------------------------------------
emulate              False (True)    Unicorn emulation of code near the current instruction
hexdump_bytes        64              number of bytes printed by hexdump command
hexdump_width        16              line width of hexdump command
telescope_lines      8               number of lines to printed by the telescope command

pwndbg/__init__.py

@@ -63,6 +63,7 @@ import pwndbg.commands.gdbinit
 import pwndbg.commands.defcon
 import pwndbg.commands.elf
 import pwndbg.commands.checksec
+import pwndbg.commands.config
 
 
 __all__ = [

pwndbg/commands/config.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+Dumps all pwndbg-specific configuration points.
+"""
+import pwndbg.commands
+import pwndbg.config
+
+
+def print_row(name, value, default, docstring):
+    name = name.ljust(20)
+
+    if value != default:
+        defval  = '%s (%s)' % (value, default)
+    else:
+        defval = value
+
+    defval  = defval.ljust(15)
+    result = ' '.join((name, defval, docstring))
+    print(result)
+    return result
+
+@pwndbg.commands.Command
+def config():
+    """Shows pwndbg-specific configuration points"""
+    header = print_row('Name','Value', 'Def', 'Documentation')
+    print('-' * (len(header)))
+    for k,v in sorted(pwndbg.config.__dict__.items()):
+        if not isinstance(v, pwndbg.config.Parameter):
+            continue
+        print_row(v.name, repr(v.value), repr(v.default), v.docstring)