Add a new variable `inhibit-interaction'

* doc/lispref/elisp.texi (Top): Add a link.
* doc/lispref/errors.texi (Standard Errors): Mention the new error.

* doc/lispref/minibuf.texi (Minibuffers): Add a link.
(Inhibiting Interaction): New node.

* src/data.c (syms_of_data): Define the `inhibited-interaction' error.

* src/lisp.h: Export the barfing function.

* src/lread.c (Fread_char, Fread_event, Fread_char_exclusive):
Barf if inhibited.

* src/minibuf.c (barf_if_interaction_inhibited): New function.
(Fread_from_minibuffer, Fread_no_blanks_input): Barf if inhibited.
(syms_of_minibuf): Define the `inhibit-interaction' variable.

1 files changed, 19 insertions, 4 deletions

diff --git a/src/lread.c b/src/lread.c
index 1ff0828e85e..4b168fb84bd 100644
--- a/src/lread.c
+++ b/src/lread.c
@@ -767,11 +767,16 @@ is used for reading a character.
 If the optional argument SECONDS is non-nil, it should be a number
 specifying the maximum number of seconds to wait for input.  If no
 input arrives in that time, return nil.  SECONDS may be a
-floating-point value.  */)
+floating-point value.
+
+If `inhibit-interaction' is non-nil, this function will signal an
+`inhibited-interaction' error.  */)
   (Lisp_Object prompt, Lisp_Object inherit_input_method, Lisp_Object seconds)
 {
   Lisp_Object val;
 
+  barf_if_interaction_inhibited ();
+
   if (! NILP (prompt))
     message_with_string ("%s", prompt, 0);
   val = read_filtered_event (1, 1, 1, ! NILP (inherit_input_method), seconds);
@@ -793,9 +798,14 @@ is used for reading a character.
 If the optional argument SECONDS is non-nil, it should be a number
 specifying the maximum number of seconds to wait for input.  If no
 input arrives in that time, return nil.  SECONDS may be a
-floating-point value.  */)
+floating-point value.
+
+If `inhibit-interaction' is non-nil, this function will signal an
+`inhibited-interaction' error.  */)
   (Lisp_Object prompt, Lisp_Object inherit_input_method, Lisp_Object seconds)
 {
+  barf_if_interaction_inhibited ();
+
   if (! NILP (prompt))
     message_with_string ("%s", prompt, 0);
   return read_filtered_event (0, 0, 0, ! NILP (inherit_input_method), seconds);
@@ -822,11 +832,16 @@ is used for reading a character.
 If the optional argument SECONDS is non-nil, it should be a number
 specifying the maximum number of seconds to wait for input.  If no
 input arrives in that time, return nil.  SECONDS may be a
-floating-point value.  */)
-  (Lisp_Object prompt, Lisp_Object inherit_input_method, Lisp_Object seconds)
+floating-point value.
+
+If `inhibit-interaction' is non-nil, this function will signal an
+`inhibited-interaction' error.  */)
+(Lisp_Object prompt, Lisp_Object inherit_input_method, Lisp_Object seconds)
 {
   Lisp_Object val;
 
+  barf_if_interaction_inhibited ();
+
   if (! NILP (prompt))
     message_with_string ("%s", prompt, 0);