Commit a65970a0 authored by Richard M. Stallman's avatar Richard M. Stallman

(syms_of_fileio): New Lisp var inhibit-file-name-operation.

(Ffind_file_name_handler): Obey that variable.  Use new meaning
for inhibit-file-name-handlers.
parent 5e65b9ab
......@@ -129,7 +129,15 @@ int insert_default_directory;
Zero means use var format. */
int vms_stmlf_recfm;
/* These variables describe handlers that have "already" had a chance
to handle the current operation.
Vinhibit_file_name_handlers is a list of file name handlers.
Vinhibit_file_name_operation is the operation being handled.
If we try to handle that operation, we ignore those handlers. */
static Lisp_Object Vinhibit_file_name_handlers;
static Lisp_Object Vinhibit_file_name_operation;
Lisp_Object Qfile_error, Qfile_already_exists;
......@@ -203,29 +211,22 @@ DEFUN ("find-file-name-handler", Ffind_file_name_handler, Sfind_file_name_handle
Otherwise, return nil.\n\
A file name is handled if one of the regular expressions in\n\
`file-name-handler-alist' matches it.\n\n\
If FILENAME is a member of `inhibit-file-name-handlers',\n\
then its handler is not run. This lets handlers\n\
If OPERATION equals `inhibit-file-name-operation', then we ignore\n\
any handlers that are members of `inhibit-file-name-handlers',\n\
but we still do run any other handlers. This lets handlers\n\
use the standard functions without calling themselves recursively.")
(filename, operation)
Lisp_Object filename, operation;
/* This function must not munge the match data. */
Lisp_Object chain;
Lisp_Object chain, inhibited_handlers;
CHECK_STRING (filename, 0);
if (! NILP (Vinhibit_file_name_handlers))
Lisp_Object tail;
for (tail = Vinhibit_file_name_handlers; CONSP (tail);
tail = XCONS (tail)->cdr)
Lisp_Object tem;
tem = Fstring_equal (tail, filename);
if (!NILP (tem))
return Qnil;
if (EQ (operation, Vinhibit_file_name_operation))
inhibited_handlers = Vinhibit_file_name_handlers;
inhibited_handlers = Qnil;
for (chain = Vfile_name_handler_alist; XTYPE (chain) == Lisp_Cons;
chain = XCONS (chain)->cdr)
......@@ -238,7 +239,14 @@ use the standard functions without calling themselves recursively.")
string = XCONS (elt)->car;
if (XTYPE (string) == Lisp_String
&& fast_string_match (string, filename) >= 0)
return XCONS (elt)->cdr;
Lisp_Object handler, tem;
handler = XCONS (elt)->cdr;
tem = Fmemq (handler, inhibited_handlers);
if (NILP (tem))
return handler;
......@@ -3992,9 +4000,14 @@ lists are merged destructively.");
Vwrite_region_annotate_functions = Qnil;
DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers,
"A list of file names for which handlers should not be used.");
"A list of file names for which handlers should not be used.\n\
This applies only to the operation `inhibit-file-name-handlers'.");
Vinhibit_file_name_handlers = Qnil;
DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation,
"The operation for which `inhibit-file-name-handlers' is applicable.");
Vinhibit_file_name_operation = Qnil;
defsubr (&Sfind_file_name_handler);
defsubr (&Sfile_name_directory);
defsubr (&Sfile_name_nondirectory);
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