editable file permissions

Extremely cruddy implementation:
- I'm still unclear on how to represent the advice function:
  - How to handle errors when loading user configuration?
    Currently I refuse to start.
  - Whole function? More errors to handle in header and so on. What if
    the function is renamed?
  - Just body? Needs more structured editing support.
- Lots of duplication, particularly between the permissions in the menu
  and the permissions screen.

I don't know how to show the hostname at the time of connect() or
bind(), so networking is going to remain a boolean for now. It's also
unclear what effective constraints we can impose on what gets discussed
with a specific hostname. Everything outside the computer is out of
one's control.

One trick I learned is for consistently grabbing ASan logs on abort:
It's always safe to redirect stderr with ncurses!

1 files changed, 1 insertions, 1 deletions

diff --git a/src/teliva.h b/src/teliva.h
index 20d3217..212a04e 100644
--- a/src/teliva.h
+++ b/src/teliva.h
@@ -155,7 +155,7 @@ extern char* Previous_message;
 extern int handle_image(lua_State* L, char** argv, int n);
 extern void developer_mode(lua_State* L);
 extern void permissions_mode(lua_State* L);
-extern int file_operations_permitted;
+extern int file_operation_permitted(const char* filename, const char* mode);
 extern int net_operations_permitted;
 
 extern int load_editor_buffer_to_current_definition_in_image(lua_State* L);