vim-patch:8.1.0881: can execute shell commands in rvim through interfaces

Problem:    Can execute shell commands in rvim through interfaces.
Solution:   Disable using interfaces in restricted mode. Allow for writing
            file with writefile(), histadd() and a few others.
https://github.com/vim/vim/commit/8c62a08faf89663e5633dc5036cd8695c80f1075

1 files changed, 9 insertions, 9 deletions

diff --git a/src/nvim/ex_cmds.c b/src/nvim/ex_cmds.c
index bc6821f60f..ba66b666e0 100644
--- a/src/nvim/ex_cmds.c
+++ b/src/nvim/ex_cmds.c
@@ -3008,18 +3008,18 @@ void ex_z(exarg_T *eap)
   ex_no_reprint = true;
 }
 
-/*
- * Check if the restricted flag is set.
- * If so, give an error message and return TRUE.
- * Otherwise, return FALSE.
- */
-int check_restricted(void)
+// Check if the restricted flag is set.
+// If so, give an error message and return true.
+// Otherwise, return false.
+bool check_restricted(void)
+  FUNC_ATTR_PURE FUNC_ATTR_WARN_UNUSED_RESULT
 {
   if (restricted) {
-    EMSG(_("E145: Shell commands not allowed in restricted mode"));
-    return TRUE;
+    EMSG(_("E145: Shell commands and some functionality not allowed"
+           " in restricted mode"));
+    return true;
   }
-  return FALSE;
+  return false;
 }
 
 /*