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, 5 insertions, 0 deletions

diff --git a/doc/lispref/errors.texi b/doc/lispref/errors.texi
index 9ec12714991..fb393b951f1 100644
--- a/doc/lispref/errors.texi
+++ b/doc/lispref/errors.texi
@@ -230,6 +230,11 @@ The message is @samp{Wrong type argument}.  @xref{Type Predicates}.
 
 @item unknown-image-type
 The message is @samp{Cannot determine image type}.  @xref{Images}.
+
+@item inhibited-interaction
+The message is @samp{User interaction while inhibited}.  This error is
+signalled when @code{inhibit-interaction} is non-@code{nil} and a user
+interaction function (like @code{read-from-minibuffer}) is called.
 @end table
 
 @ignore    The following seem to be unused now.