Filter shell commands based on which ones are actually available

pwndbg/commands/shell.py

@@ -10,6 +10,7 @@ import os
 
 import gdb
 import pwndbg.commands
+import pwndbg.which
 
 shellcmds = [
     "asm", # pwntools
@@ -69,6 +70,8 @@ shellcmds = [
     "zsh",
 ]
 
+shellcmds = filter(pwndbg.which.which, shellcmds)
+
 def register_shell_function(cmd):
     def handler(*a):
         """Invokes %s""" % cmd