Commit | Line | Data |
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3224dac1 | 1 | -*- coding: utf-8; mode: text; -*- |
28d440ab KL |
2 | GOAL |
3 | ---- | |
4 | ||
856dd475 KL |
5 | This branch implements support for opening multiple, different tty |
6 | devices and simultaneous X and tty frames from a single Emacs session. | |
28d440ab | 7 | |
7b00d185 | 8 | Some use cases: |
7b00d185 KL |
9 | Emacs is notoriously slow at startup, so most people use another |
10 | editor or emacsclient for quick editing jobs from the console. | |
11 | Unfortunately, emacsclient was very awkward to use, because it did not | |
12 | support opening a new Emacs frame on the current virtual console. | |
13 | Now, with multi-tty support, it can do that. (Emacsclient starts up | |
14 | faster than vi!) | |
15 | ||
16 | Some Gnus users (including me) run Gnus in an X frame in its own Emacs | |
17 | instance, which they typically leave running for weeks. It would be | |
18 | nice if they could connect to this instance from a remote ssh session | |
19 | and check their messages without opening a remote X frame or resorting | |
20 | to gnus-slave. | |
21 | ||
28d440ab KL |
22 | WHO IS DOING IT |
23 | --------------- | |
24 | ||
25 | I'm Károly Lőrentey. My address: lorentey@elte.hu. | |
26 | ||
422f68e0 KL |
27 | Comments, bug reports, suggestions and patches are welcome; send them |
28 | to multi-tty@lists.fnord.hu. | |
29 | ||
856dd475 KL |
30 | The following is a (sadly incomplete) list of people who have |
31 | contributed to the project by testing, submitting patches, bug | |
32 | reports, and suggestions. Thanks! | |
33 | ||
34 | ARISAWA Akihiro <ari at mbf dot ocn dot ne dot jp> | |
1a27213c | 35 | Vincent Bernat <bernat at luffy dot cx> |
856dd475 KL |
36 | Han Boetes <han at mijncomputer dot nl> |
37 | Robert J. Chassell <bob at rattlesnake dot com> | |
38 | Romain Francoise <romain at orebokech dot com> | |
39 | Ami Fischman <ami at fischman dot org> | |
40 | Friedrich Delgado Friedrichs <friedel at nomaden dot org> | |
41 | IRIE Tetsuya <irie at t dot email dot ne dot jp> | |
42 | Yoshiaki Kasahara <kasahara at nc dot kyushu-u dot ac dot jp> | |
43 | Jurej Kubelka <Juraj dot Kubelka at email dot cz> | |
44 | David Lichteblau <david at lichteblau dot com> | |
44d7460c | 45 | Xavier Mallard <zedek at gnu-rox dot org> |
856dd475 KL |
46 | Istvan Marko <mi-mtty at kismala dot com> |
47 | Ted Morse <morse at ciholas dot com> | |
48 | Dan Nicolaescu <dann at ics dot uci dot edu> | |
49 | Gergely Nagy <algernon at debian dot org> | |
50 | Mark Plaksin <happy at mcplaksin dot org> | |
51 | Francisco Borges <borges at let dot rug dot nl> | |
52 | Frank Ruell <stoerte at dreamwarrior dot net> | |
53 | Dan Waber <dwaber at logolalia dot com> | |
54 | and many others. | |
55 | ||
56 | Richard Stallman was kind enough to review an earlier version of my | |
57 | patches. | |
58 | ||
59 | ||
422f68e0 KL |
60 | MAILING LISTS |
61 | ------------- | |
62 | ||
63 | The multi-tty mailing list (discussion & bug reports): | |
64 | ||
65 | Address: multi-tty@lists.fnord.hu | |
66 | Signup: http://lists.fnord.hu/mailman/listinfo/multi-tty | |
67 | Archive: http://news.gmane.org/gmane.emacs.multi-tty/ | |
68 | ||
69 | Commit notifications (read-only): | |
70 | ||
71 | Address: multi-tty-commits@lists.fnord.hu | |
72 | Signup: http://lists.fnord.hu/mailman/listinfo/multi-tty-commits | |
73 | ||
74 | ||
75 | STATUS | |
76 | ------ | |
77 | ||
78 | The branch is now very stable and almost full-featured. All of the | |
79 | major problems have been fixed, only a few minor issues remain. (It | |
80 | still needs to be ported to Windows/Mac/DOS, though.) Both multiple | |
81 | tty device support and simultaneous X and tty frame support works | |
82 | fine. Emacsclient has been extended to support opening new tty and X | |
83 | frames. It has been changed open new Emacs frames by default. | |
84 | ||
85 | The multi-tty branch has been scheduled for inclusion in the next | |
779d7de9 | 86 | major release of Emacs (version 23). I expect the merge into the |
422f68e0 KL |
87 | development trunk to occur sometime during next year (2005), after the |
88 | merge of the Unicode branch. | |
89 | ||
90e06c2e KL |
90 | Tested on GNU/Linux, Solaris 8, FreeBSD and OpenBSD. Please let me |
91 | know if you succeed or fail to use it on other platforms---I'll have a | |
92 | few tricky test cases for you. | |
422f68e0 KL |
93 | |
94 | Known problems: | |
95 | ||
779d7de9 KL |
96 | * GTK support. If you compile your Emacs with the GTK |
97 | toolkit, some functionality of multi-tty will be lost. | |
a9d63618 | 98 | In particular, closing an X display causes a crash. |
779d7de9 KL |
99 | Current releases of GTK have limitations and bugs that |
100 | prevent full-blown multi-display support in Emacs. Use the | |
101 | Lucid toolkit if you want to see a complete feature set. | |
102 | ||
856dd475 KL |
103 | * The single-kboard mode. |
104 | ||
105 | If your multi-tty Emacs session seems to be frozen, you | |
106 | probably have a recursive editing session or a pending | |
107 | minibuffer prompt (which is a kind of recursive editing) on | |
108 | another display. To unfreeze your session, switch to that | |
109 | display and complete the recursive edit, for example by | |
110 | pressing C-] (`abort-recursive-edit'). | |
111 | ||
112 | I am sorry to say that currently there is no way to break | |
113 | out of this "single-kboard mode" from a frozen display. If | |
114 | you are unable to switch to the display that locks the | |
115 | others (for example because it is on a remote computer), | |
116 | then you can use emacsclient to break out of all recursive | |
117 | editing sessions: | |
118 | ||
119 | emacsclient -e '(top-level)' | |
120 | ||
121 | Note that this (perhaps) unintuitive behaviour is by design. | |
122 | Single-kboard mode is required because of an intrinsic Emacs | |
123 | limitation that is very hard to eliminate. (This limitation | |
124 | is related to the single-threaded nature of Emacs.) | |
125 | ||
126 | I plan to implement better user notification and support for | |
127 | breaking out of single-kboard mode from locked displays. | |
128 | ||
129 | * Mac, Windows and DOS support is broken, doesn't even | |
130 | compile. Multiple display support will probably not provide | |
131 | new Emacs features on these systems, but the multi-tty | |
132 | branch changed a few low-level interfaces, and the | |
133 | system-dependent source files need to be adapted | |
134 | accordingly. The changes are mostly trivial, so almost | |
135 | anyone can help, if only by compiling the branch and | |
136 | reporting the compiler errors. (It is not worth to do this | |
137 | yet, though.) | |
138 | ||
422f68e0 | 139 | |
422f68e0 KL |
140 | HOW TO GET THE BRANCH |
141 | --------------------- | |
142 | ||
143 | The branch uses GNU Arch (http://www.gnuarch.org) for version control. | |
28d440ab | 144 | |
6548cf00 | 145 | Retrieving the latest version of the branch: |
4f0359de | 146 | |
44d7460c | 147 | tla register-archive -f http://lorentey.hu/arch/2004/ |
be0f4123 KL |
148 | tla get lorentey@elte.hu--2004/emacs--multi-tty <directory> |
149 | ||
150 | This incantation uses my private archive mirror that is hosted on a | |
151 | relatively low-bandwidth site; if you are outside Hungary, you will | |
779d7de9 KL |
152 | probably want to you use my secondary mirror: (Note that the -f option |
153 | will overwrite the archive location if you have previously registered | |
154 | the Hungarian one.) | |
155 | ||
156 | tla register-archive -f http://aszt.inf.elte.hu/~lorentey/mirror/arch/2004 | |
157 | tla get lorentey@elte.hu--2004/emacs--multi-tty <directory> | |
158 | ||
159 | http://aszt.inf.elte.hu/~lorentey/mirror/arch/2004 | |
160 | ||
161 | The Arch supermirror provides mirroring services for all public Arch | |
162 | repositories. We have a mirror there, too, if you prefer. | |
be0f4123 | 163 | |
779d7de9 | 164 | tla register-archive -f http://mirrors.sourcecontrol.net/lorentey%40elte.hu--2004 |
daf01701 | 165 | tla get lorentey@elte.hu--2004/emacs--multi-tty <directory> |
4f0359de | 166 | |
44d7460c KL |
167 | My GPG key id is 0FB27A3F; it is available from |
168 | hkp://wwwkeys.eu.pgp.net/, or from my homepage at | |
422f68e0 | 169 | http://lorentey.hu/rolam/gpg.html) |
7b00d185 | 170 | |
856dd475 KL |
171 | Don't worry if the above checkout takes a few minutes to complete; |
172 | once you have a source tree, updating it to the latest revision will | |
173 | be _much_ faster. Use the following command for the update: | |
6ad9aaa9 | 174 | |
856dd475 | 175 | tla replay |
6ad9aaa9 | 176 | |
856dd475 KL |
177 | You can find more information about Arch on http://wiki.gnuarch.org/. |
178 | It's a wonderful source control system, I highly recommend it. | |
6ad9aaa9 | 179 | |
422f68e0 | 180 | If you don't have tla, the branch has a homepage from which you can |
7b00d185 | 181 | download conventional patches against Emacs CVS HEAD: |
4f0359de | 182 | |
be0f4123 | 183 | http://lorentey.hu/project/emacs.html |
28d440ab | 184 | |
779d7de9 KL |
185 | DEBIAN PACKAGES |
186 | --------------- | |
187 | ||
188 | If you run Debian, or a distribution based on Debian, you are welcome | |
189 | to use our binary packages; put these lines in your /etc/apt/sources.list: | |
190 | ||
191 | # Multi-tty Emacs | |
192 | deb http://aszt.inf.elte.hu/~lorentey/mirror/apt ./ | |
193 | deb-src http://aszt.inf.elte.hu/~lorentey/mirror/apt ./ | |
194 | ||
195 | Note that these packages are intended solely to provide an easy way to | |
196 | test the new multi-tty features. They are not to be taken as Emacs | |
197 | releases, and it's a mistake to expect robust operation or any kind of | |
198 | timely support for them. Do not install them, unless you'd like to | |
199 | have your editor crash on you. | |
200 | ||
28d440ab | 201 | |
90e06c2e KL |
202 | COMPILATION |
203 | ----------- | |
0c72d684 | 204 | |
d03a8fe4 | 205 | The multi-tty branch is compiled the same way as Emacs itself: |
bc279d67 | 206 | |
90e06c2e KL |
207 | make maintainer-clean # (If you have compiled Emacs before) |
208 | ||
d03a8fe4 | 209 | ./configure <your favourite options> |
bc279d67 | 210 | make bootstrap |
d03a8fe4 KL |
211 | make install |
212 | ||
90e06c2e KL |
213 | If you have strange compilation errors, they may be caused by old |
214 | *.elc files that are left over from an earlier bootstrap. The `make | |
215 | maintainer-clean' target deletes them, so it is a good idea to run | |
216 | that before reporting a bug. (Emacs requires a clean recompilation | |
217 | after certain kinds of source code changes.) | |
d03a8fe4 | 218 | |
90e06c2e KL |
219 | TESTING |
220 | ------- | |
221 | ||
222 | To test the multi-tty branch, start up the Emacs server with the | |
d03a8fe4 KL |
223 | following commands: |
224 | ||
225 | emacs | |
7b00d185 | 226 | M-x server-start |
bc279d67 | 227 | |
7b00d185 KL |
228 | and then (from a shell prompt on another terminal) start emacsclient |
229 | with | |
d03a8fe4 KL |
230 | emacsclient -t /optional/file/names... (for a tty frame) |
231 | emacsclient /optional/file/names... (for an X frame) | |
28d440ab | 232 | |
d03a8fe4 | 233 | (Make sure both emacs and emacsclient are multi-tty versions.) |
04c3243c | 234 | You'll hopefully have two fully working, independent frames on |
7b00d185 | 235 | separate terminals. The new frame is closed automatically when you |
2a0c7b06 KL |
236 | finish editing the specified files (C-x #), but delete-frame (C-x 5 0) |
237 | also works. Of course, you can create frames on more than two tty | |
238 | devices. | |
52c2ee2a | 239 | |
7b00d185 KL |
240 | Creating new frames on the same tty with C-x 5 2 works, and they |
241 | behave the same way as in previous Emacs versions. If you exit emacs, | |
242 | all terminals should be restored to their previous states. | |
daf01701 | 243 | |
856dd475 KL |
244 | This is work in progress, and probably full of bugs. It is a good |
245 | idea to run emacs from gdb, so that you'll have a live instance to | |
246 | debug if something goes wrong. Please send me your bug reports on our | |
247 | mailing list: multi-tty@lists.fnord.hu | |
04c3243c | 248 | |
422f68e0 KL |
249 | TIPS & TRICKS |
250 | ------------- | |
251 | ||
bacb6689 KL |
252 | I think the best way to use the new Emacs is to have it running inside |
253 | a disconnected GNU screen session, and always use emacsclient for | |
422f68e0 KL |
254 | normal work. One advantage of this is that not a single keystroke of |
255 | your work will be lost if the display device that you are using | |
256 | crashes, or the network connection times out, or whatever. (I had an | |
257 | extremely unstable X server for some time while I was developing these | |
258 | patches, and running Emacs this way has saved me a number of M-x | |
259 | recover-session invocations.) | |
260 | ||
97c57fb2 KL |
261 | I use the following two bash scripts to handle my Emacs sessions: |
262 | ||
263 | -------------------------------------------------------connect-emacs-- | |
264 | #!/bin/bash | |
265 | # Usage: connect-emacs <name> <args>... | |
266 | # | |
267 | # Connects to the Emacs instance called NAME. Starts up the instance | |
268 | # if it is not already running. The rest of the arguments are passed | |
269 | # to emacsclient. | |
270 | ||
271 | name="$1" | |
272 | shift | |
273 | ||
274 | if [ -z "$name" ]; then | |
275 | echo "Usage: connect_emacs <name> <args>..." >&2 | |
276 | exit 1 | |
277 | fi | |
278 | preload-emacs "$name" wait | |
279 | /usr/bin/emacsclient.emacs-multi-tty -s "$name" "$@" | |
280 | ---------------------------------------------------------------------- | |
281 | ||
282 | -------------------------------------------------------preload-emacs-- | |
283 | #!/bin/bash | |
284 | # Usage: preload-emacs <name> [<waitp>] | |
285 | # | |
286 | # Preloads the Emacs instance called NAME in a detached screen | |
287 | # session. Does nothing if the instance is already running. If WAITP | |
288 | # is non-empty, the function waits until the server starts up and | |
289 | # creates its socket; otherwise it returns immediately. | |
290 | ||
291 | name="$1" | |
292 | waitp="$2" | |
293 | screendir="/var/run/screen/S-$USER" | |
294 | serverdir="/tmp/emacs$UID" | |
295 | emacs=/usr/bin/emacs-multi-tty # Or wherever you installed your multi-tty Emacs | |
296 | ||
297 | if [ -z "$name" ]; then | |
298 | echo "Usage: preload_emacs <name> [<waitp>]" >&2 | |
299 | exit 1 | |
300 | fi | |
301 | ||
302 | if [ ! -e "$screendir"/*."$name" ]; then | |
303 | if [ -e "$serverdir/$name" ]; then | |
304 | # Delete leftover socket (for the wait option) | |
305 | rm "$serverdir/$name" | |
306 | fi | |
307 | screen -dmS "$name" "$emacs" -nw --eval "(setq server-name \"$name\")" -f server-start | |
308 | fi | |
309 | if [ ! -z "$waitp" ]; then | |
310 | while [ ! -e "$serverdir/$name" ]; do sleep 0.1; done | |
311 | fi | |
312 | ---------------------------------------------------------------------- | |
313 | ||
314 | I have the following in my profile to have two instances automatically | |
315 | preloaded for editing and email: | |
316 | ||
317 | preload-emacs editor | |
318 | preload-emacs gnus | |
319 | ||
320 | It is useful to set up short aliases for connect-emacs. I use the | |
321 | following: | |
322 | ||
323 | alias edit="connect-emacs editor" | |
324 | alias e=edit | |
325 | alias et="connect-emacs editor -t" | |
326 | alias gnus="connect-emacs gnus" | |
422f68e0 | 327 | |
28d440ab | 328 | |
2a42d440 KL |
329 | CHANGELOG |
330 | --------- | |
331 | ||
332 | See arch logs. | |
333 | ||
334 | ||
28d440ab KL |
335 | NEWS |
336 | ---- | |
337 | ||
2a42d440 | 338 | For the NEWS file: (Needs much, much work) |
28d440ab | 339 | |
2246281f | 340 | ** Support for multiple terminal devices has been added. |
6548cf00 | 341 | |
2246281f KL |
342 | *** You can specify a terminal device (`tty' parameter) and a terminal |
343 | type (`tty-type' parameter) to `make-terminal-frame'. | |
6548cf00 | 344 | |
2246281f KL |
345 | *** You can test for the presence of multiple terminal support by |
346 | testing for the `multi-tty' feature. | |
28d440ab | 347 | |
2246281f | 348 | *** Emacsclient has been extended to support opening a new terminal |
aaaf7fe1 KL |
349 | frame. Its behaviour has been changed to open a new Emacs frame by |
350 | default. Use the -c option to get the old behavior of opening | |
351 | files in the currently selected Emacs frame. | |
e5299d8d | 352 | |
2246281f KL |
353 | *** A make-frame-on-tty function has been added to make it easier to |
354 | create frames on new terminals. | |
355 | ||
2a42d440 KL |
356 | *** New functions: frame-tty-name, frame-tty-type, delete-tty, |
357 | terminal-local-value, set-terminal-local-value | |
2246281f | 358 | |
4400e764 KL |
359 | terminal-id, terminal-parameters, terminal-parameter, |
360 | set-terminal-parameter | |
361 | ||
2a42d440 | 362 | *** New variables: global-key-translation-map |
2246281f | 363 | |
2a42d440 KL |
364 | *** The keymaps key-translation-map and function-key-map are now |
365 | terminal-local. | |
2246281f KL |
366 | |
367 | ** Support for simultaneous graphical and terminal frames has been | |
368 | added. | |
369 | ||
370 | *** The function `make-frame-on-display' now works during a terminal | |
371 | session, and `make-frame-on-tty' works during a graphical session. | |
372 | ||
373 | *** The `window-system' variable has been made frame-local. | |
374 | ||
375 | *** The new `initial-window-system' variable contains the | |
376 | `window-system' value for the first frame. | |
819b8f00 | 377 | |
2a42d440 | 378 | *** talk.el has been extended for multiple tty support. |
28d440ab | 379 | |
28d440ab | 380 | |
90e06c2e KL |
381 | * * * |
382 | ||
383 | (The rest of this file consists of my development notes and as such it | |
384 | is probably not very interesting for anyone else.) | |
385 | ||
7b00d185 KL |
386 | THINGS TO DO |
387 | ------------ | |
4edd8a5c | 388 | |
f0caabd9 KL |
389 | ** xt-mouse.el needs to be adapted for multi-tty. It currently |
390 | signals an error on kill-emacs under X, which prevents the user | |
391 | from exiting Emacs. (Reported by Mnemonikk on freenode.) | |
392 | ||
5b65d888 KL |
393 | ** Consider the `tty-type' frame parameter and the `display-tty-type' |
394 | function. They serve the exact same purpose. I think it may be | |
395 | a good idea to eliminate one of them, preferably `tty-type'. | |
396 | ||
4400e764 KL |
397 | ** The handling of lisp/term/*.el, and frame creation in general, is a |
398 | big, big mess. How come the terminal-specific file is loaded by | |
399 | tty-create-frame-with-faces? I don't think it is necessary to load | |
400 | these files for each frame; once per terminal should be enough. | |
401 | ||
402 | ** Fix frame-set-background-mode in this branch. It was recently | |
403 | changed in CVS, and frame.el in multi-tty has not yet been adapted | |
404 | for the changes. (It needs to look at | |
405 | default-frame-background-mode.) | |
406 | ||
407 | ** I think `(set-)terminal-local-value' and the terminal parameter | |
408 | mechanism should be integrated into a single framework. | |
409 | ||
410 | ** Add the following hooks: after-delete-frame-hook (for server.el, | |
411 | instead of delete-frame-functions), | |
412 | after-delete-terminal-functions, after-create-terminal-functions. | |
413 | ||
1fb8c4ad KL |
414 | ** Having {reset,init}_all_sys_modes in set-input-mode breaks arrow |
415 | keys on non-selected terminals under screen, and sometimes on other | |
416 | terminal types as well. The other function keys continue to work | |
417 | fine. Sometimes faces on these screens become garbled. | |
418 | ||
419 | This only seems to affect displays that are of the same terminfo | |
420 | type as the selected one. Interestingly, in screen Emacs normally | |
421 | reports the up arrow key as `M-o A', but after the above SNAFU, it | |
422 | complains about `M-[ a'. UNIX ttys are a complete mystery to me, | |
423 | but it seems the reset-reinitialize cycle somehow leaves the | |
424 | non-selected terminals in a different state than usual. I have no | |
425 | idea how this could happen. | |
426 | ||
427 | Currently set-input-mode resets only the currently selected | |
428 | terminal, which seems to somehow work around the problem. | |
429 | ||
430 | ** Fix set-input-mode for multi-tty. It's a truly horrible interface; | |
431 | what if we'd blow it up into several separate functions (with a | |
432 | compatibility definition)? | |
433 | ||
434 | ** BULK RENAME: The `display-' prefix of new Lisp-level functions | |
435 | conflicts with stuff like `display-time-mode'. Use `device-' | |
7d6d7d1a KL |
436 | or `terminal-' instead. I think I prefer `terminal-'. |
437 | ||
3e6f836c KL |
438 | It turns out that most of the offending Lisp functions were defined |
439 | in the trunk. Therefore, compatibility aliases should be defined | |
440 | for the following names: | |
441 | ||
442 | display-color-cells terminal-color-cells | |
443 | display-color-p terminal-color-p | |
444 | display-graphic-p terminal-graphic-p | |
445 | display-grayscale-p terminal-grayscale-p | |
446 | display-images-p terminal-images-p | |
447 | display-mm-height terminal-mm-height | |
448 | display-mm-width terminal-mm-width | |
449 | display-mouse-p terminal-mouse-p | |
450 | display-multi-font-p terminal-multi-font-p | |
451 | display-multi-frame-p terminal-multi-frame-p | |
452 | display-pixel-height terminal-pixel-height | |
453 | display-pixel-width terminal-pixel-width | |
454 | display-pixels-per-inch terminal-pixels-per-inch | |
455 | display-planes terminal-planes | |
456 | display-popup-menus-p terminal-popup-menus-p | |
457 | display-save-under terminal-save-under | |
458 | display-screens terminal-screens | |
459 | display-supports-face-attributes-p terminal-supports-face-attributes-p | |
460 | display-visual-class terminal-visual-class | |
461 | framep-on-display framep-on-terminal | |
462 | frames-on-display-list frames-on-terminal-list | |
463 | ||
464 | The following functions were introduced in the multi-tty branch, and | |
465 | can be renamed without aliases: | |
466 | ||
467 | display-controlling-tty-p terminal-controlling-tty-p | |
468 | display-list terminal-list | |
469 | display-live-p terminal-live-p | |
470 | display-name terminal-name | |
471 | display-tty-type terminal-tty-type | |
472 | frame-display terminal-of-frame | |
7e59217d | 473 | delete-display delete-terminal |
3e6f836c | 474 | |
7d6d7d1a KL |
475 | ** The semantics of terminal-local variables are confusing; it is not |
476 | clear what binding is in effect in any given time. See if | |
477 | current_kboard (or at least the terminal-local bindings exported to | |
478 | Lisp) might be changed to be tied to the selected frame instead. | |
479 | Currently, `function-key-map' and `key-translation-map' may be | |
480 | accessed reliably only using the hackish | |
481 | `(set-)terminal-local-value' functions. | |
482 | ||
483 | Perhaps there should be a difference between `last-command' &co. | |
484 | and these more conventional configuration variables. | |
485 | (E.g. `symbol-value' would use current_kboard to access | |
486 | `last-command', but SELECTED_FRAME()->display->kboard to get the | |
487 | value of `function-key-map'. | |
1fb8c4ad | 488 | |
856dd475 KL |
489 | ** The single-keyboard mode of MULTI_KBOARD is extremely confusing |
490 | sometimes; Emacs does not respond to stimuli from other keyboards. | |
491 | At least a beep or a message would be important, if the single-mode | |
492 | is still required to prevent interference. (Reported by Dan | |
493 | Nicolaescu.) | |
494 | ||
495 | Update: selecting a region with the mouse enables single_kboard | |
496 | under X. This is very confusing. | |
497 | ||
68bba4e4 KL |
498 | Update: After discussions with Richard Stallman, this will be |
499 | resolved by having locked displays warn the user to wait, and | |
500 | introducing a complex protocol to remotely bail out of | |
501 | single-kboard mode by pressing C-g. | |
856dd475 KL |
502 | |
503 | Update: Warning the user is not trivial to implement, as Emacs has | |
68bba4e4 KL |
504 | only one echo area, shared by all frames. Ideally the warning |
505 | should not be displayed on the display that is locking the others. | |
506 | Perhaps the high probability of user confusion caused by | |
507 | single_kboard mode deserves a special case in the display code. | |
508 | Alternatively, it might be good enough to signal single_kboard mode | |
509 | by changing the modelines or some other frame-local display element | |
510 | on the locked out displays. | |
856dd475 | 511 | |
d51abf22 KL |
512 | ** The session management module is prone to crashes when the X |
513 | connection is closed and then later I try to connect to a new X | |
514 | session: | |
515 | ||
516 | #0 0xb7ebc806 in SmcGetIceConnection () from /usr/X11R6/lib/libSM.so.6 | |
517 | #1 0x080e6641 in x_session_check_input (bufp=0xbf86c9c0) at xsmfns.c:144 | |
518 | #2 0x080d3bbc in XTread_socket (device=0xa722ff8, expected=1, hold_quit=0xbf86ca90) at xterm.c:7037 | |
519 | #3 0x080fa404 in read_avail_input (expected=1) at keyboard.c:6696 | |
520 | #4 0x080fa4ca in handle_async_input () at keyboard.c:6900 | |
521 | #5 0x080d51fa in x_term_init (display_name=162628899, xrm_option=0x0, resource_name=0x857068c "emacs") at xterm.c:10622 | |
522 | #6 0x080d920e in x_display_info_for_name (name=162628899) at xfns.c:3975 | |
523 | #7 0x080d92f9 in check_x_display_info (object=1) at xfns.c:274 | |
524 | #8 0x080d97b8 in Fx_create_frame (parms=151221485) at xfns.c:3016 | |
525 | #9 0x0815bf72 in Ffuncall (nargs=2, args=0xbf86ceec) at eval.c:2851 | |
526 | ||
527 | I installed a workaround to prevent this. The X session manager is | |
528 | only contacted when the very first display in the Emacs session is | |
529 | an X display. Also, x_delete_display() on this display aborts | |
530 | session management, and XTread_socket only calls | |
531 | x_session_check_input when it is called for the display that the | |
532 | session was opened on. While this does not really fix the bug, it | |
533 | makes it much less frequent, because session manager support will | |
534 | not normally be enabled when Emacs can survive the shutdown of the | |
535 | X server. | |
536 | ||
537 | See if xsmfns.c should be updated. | |
538 | ||
856dd475 KL |
539 | ** normal-erase-is-backspace-mode in simple.el needs to be updated for |
540 | multi-tty (rep. by Dan Waber). | |
ec160444 | 541 | |
b6660415 KL |
542 | ** Hunt down display-related functions in frame.el and extend them all |
543 | to accept display ids. | |
544 | ||
856dd475 KL |
545 | ** rif->flush_display_optional (NULL) calls should be replaced by a |
546 | new global function. | |
547 | ||
97c57fb2 KL |
548 | ** The set-locale-environment hack (adding the DISPLAY option) should |
549 | be replaced with a clean design. | |
68bba4e4 | 550 | |
97c57fb2 KL |
551 | ** standard-display-table should be display-local. |
552 | standard-display-european should be display-local. | |
68bba4e4 | 553 | |
7d6d7d1a KL |
554 | ** With iswitchb-default-method set to 'always-frame, only frames on |
555 | the current display should be considered. This might involve | |
556 | extending `get-buffer-window'. | |
557 | ||
97c57fb2 KL |
558 | ** Have a look at Vlocale_coding_system. Seems like it would be a |
559 | tedious job to localize it, although most references use it for | |
560 | interfacing with libc and are therefore OK with the global | |
561 | definition. | |
562 | ||
563 | Exceptions found so far: x-select-text and | |
564 | x-cut-buffer-or-selection-value. | |
68bba4e4 | 565 | |
6ea444cf KL |
566 | ** Have a look at fatal_error_hook. |
567 | ||
97b977db KL |
568 | ** Have a look at set_frame_matrix_frame. |
569 | ||
7d1a6b33 KL |
570 | ** Check if we got term-setup-hook right. |
571 | ||
9d3d44ba KL |
572 | ** I think tip_frame should be display-local. |
573 | ||
574 | ** Check display reference count handling in x_create_tip_frame. | |
575 | ||
54021676 KL |
576 | ** make-frame does not correctly handle extra parameters in its |
577 | argument: | |
578 | ||
579 | (frame-parameter (make-frame (list (cons 'foobar 42))) 'foobar) | |
580 | => nil | |
581 | ||
582 | (This is likely an error in the CVS trunk.) | |
583 | ||
01d81f75 KL |
584 | ** Dan Nicolaescu suggests that -nw should be added as an alias for -t |
585 | in emacsclient. Good idea. (Alas, implementing this is not | |
586 | trivial, getopt_long does not seem to support two-letter ``short'' | |
d3c554a0 | 587 | options. Patches are welcome.) :-) |
01d81f75 KL |
588 | |
589 | ** Mark Plaksin suggests that emacsclient should accept the same | |
590 | X-related command-line arguments as Emacs. Most of the X-related | |
591 | argument-handling is done in Lisp, so this should be quite easy to | |
592 | implement. | |
d448e982 | 593 | |
cd5355f9 KL |
594 | ** Gergely Nagy suggests that C-x # should only kill the current |
595 | frame, not any other emacsclient frame that may have the same file | |
596 | opened for editing. I think I agree with him. | |
597 | ||
0b0d3e0b KL |
598 | ** Very strange bug: visible-bell does not work on secondary |
599 | terminals in xterm and konsole. The screen does flicker a bit, | |
600 | but it's so quick it isn't noticable. | |
601 | ||
428a555e | 602 | ** Move baud_rate to struct display. |
7b00d185 | 603 | |
7b00d185 KL |
604 | ** Implement support for starting an interactive Emacs session without |
605 | an initial frame. (The user would connect to it and open frames | |
f70dd009 | 606 | later, with emacsclient.) |
7b00d185 | 607 | |
2cd1371d KL |
608 | ** Fix Mac support (I can't do this entirely myself). Note that the |
609 | current state of Mac-specific source files in the multi-tty tree | |
610 | are not useful; before starting work on Mac support, revert to | |
611 | pristine, pre-multi-tty versions. | |
7b00d185 | 612 | |
2cd1371d KL |
613 | ** Fix W32 support (I can't do this entirely myself). Note that the |
614 | current state of W32-specific source files in the multi-tty tree | |
615 | are not useful; before starting work on W32 support, revert to | |
616 | pristine, pre-multi-tty versions. | |
7b00d185 | 617 | |
2cd1371d KL |
618 | ** Fix DOS support (I can't do this entirely myself). Note that the |
619 | current state of DOS-specific source files in the multi-tty tree | |
620 | are not useful; before starting work on DOS support, revert to | |
621 | pristine, pre-multi-tty versions. | |
7b00d185 KL |
622 | |
623 | ** Do a grep on XXX and ?? for more issues. | |
624 | ||
d3c554a0 KL |
625 | ** Understand Emacs's low-level input system (it's black magic) :-) |
626 | What exactly does interrupt_input do? I tried to disable it for | |
627 | raw secondary tty support, but it does not seem to do anything | |
628 | useful. (Update: Look again. X unconditionally enables this, maybe | |
629 | that's why raw terminal support is broken again. I really do need | |
630 | to understand input.) | |
7b00d185 | 631 | |
7d6d7d1a KL |
632 | ** Fix stuff_char for multi-tty. Doesn't seem to be of high priority. |
633 | ||
6548cf00 KL |
634 | DIARY OF CHANGES |
635 | ---------------- | |
636 | ||
637 | (ex-TODO items with explanations.) | |
28d440ab | 638 | |
114a8b8c | 639 | -- Introduce a new struct for terminal devices. |
28d440ab | 640 | |
daf01701 | 641 | (Done, see struct tty_output. The list of members is not yet |
28d440ab KL |
642 | complete.) |
643 | ||
28d440ab KL |
644 | -- Change the bootstrap procedure to initialize tty_list. |
645 | ||
646 | (Done, but needs review.) | |
647 | ||
28d440ab KL |
648 | -- Change make-terminal-frame to support specifying another tty. |
649 | ||
650 | (Done, new frame parameters: `tty' and `tty-type'.) | |
651 | ||
9628b887 KL |
652 | -- Implement support for reading from multiple terminals. |
653 | ||
654 | (Done, read_avail_input tries to read from each terminal, until one | |
28d7d09f | 655 | succeeds. MULTI_KBOARD is not used. Secondary terminals don't send |
6548cf00 | 656 | SIGIO!) |
9628b887 | 657 | |
819b8f00 KL |
658 | (Update: They do, now.) |
659 | ||
daf01701 KL |
660 | (Update2: After enabling X, they don't.) |
661 | ||
9628b887 | 662 | -- other-frame should cycle through the frames on the `current' |
114a8b8c | 663 | terminal only. |
9628b887 | 664 | |
6548cf00 | 665 | (Done, by trivially modifiying next_frame and prev_frame.) |
9628b887 KL |
666 | |
667 | -- Support different terminal sizes. | |
114a8b8c | 668 | |
9628b887 KL |
669 | (Done, no problem.) |
670 | ||
671 | -- Make sure terminal resizes are handled gracefully. (Could be | |
672 | problematic.) | |
673 | ||
6548cf00 KL |
674 | (Done. We don't get automatic SIGWINCH for additional ttys, |
675 | though.) | |
9628b887 KL |
676 | |
677 | -- Extend emacsclient to automatically open a new tty when it connects | |
678 | to Emacs. | |
114a8b8c | 679 | |
9628b887 KL |
680 | (Done. It's an ugly hack, needs more work.) |
681 | ||
52c2ee2a KL |
682 | -- Redisplay must refresh the topmost frame on *all* terminals, not |
683 | just the initial terminal. | |
114a8b8c | 684 | |
52c2ee2a | 685 | (Done, but introduced an ugly redisplay problems. Ugh.) |
9628b887 | 686 | |
6548cf00 KL |
687 | -- Fix redisplay problems. |
688 | ||
52c2ee2a KL |
689 | (Done; it turned out that the entire Wcm structure must be moved |
690 | inside tty_output. Why didn't I catch this earlier?) | |
6548cf00 KL |
691 | |
692 | -- Provide a way for emacsclient to tell Emacs that the tty has been | |
693 | resized. | |
694 | ||
695 | (Done, simply forward the SIGWINCH signal.) | |
696 | ||
697 | -- Each keypress should automatically select the frame corresponding | |
698 | to the terminal that it was coming from. This means that Emacs | |
699 | must know from which terminal the last keyboard event came from. | |
6548cf00 | 700 | |
52c2ee2a KL |
701 | (Done, it was quite simple, the input event system already |
702 | supported multiple frames.) | |
6548cf00 KL |
703 | |
704 | -- Fix SIGIO issue with secondary terminals. | |
705 | ||
706 | (Done, emacsclient signals Emacs after writing to the proxy pseudo | |
52c2ee2a KL |
707 | terminal. Note that this means that multi-tty does not work with |
708 | raw ttys!) | |
28d440ab | 709 | |
0a125897 KL |
710 | (Update: This is bullshit. There is a read_input_waiting function, |
711 | extend that somehow.) | |
712 | ||
819b8f00 KL |
713 | (Update of update: The first update was not right either, extending |
714 | read_input_waiting was not necessary. Secondary ttys do seem to | |
715 | send signals on input.) | |
716 | ||
daf01701 KL |
717 | (Update^3: Not any more.) |
718 | ||
fca177d4 KL |
719 | -- Make make-terminal-frame look up the `tty' and `tty-type' frame |
720 | parameters from the currently selected terminal before the global | |
721 | default. | |
722 | ||
723 | (Done.) | |
724 | ||
725 | -- Put all cached terminal escape sequences into struct tty_output. | |
726 | Currently, they are still stored in global variables, so we don't | |
727 | really support multiple terminal types. | |
728 | ||
52c2ee2a | 729 | (Done. It was not fun.) |
fca177d4 KL |
730 | |
731 | -- Implement sane error handling after initialization. (Currently | |
6548cf00 KL |
732 | emacs exits if you specify a bad terminal type.) The helpful error |
733 | messages must still be provided when Emacs starts. | |
734 | ||
fca177d4 KL |
735 | (Done.) |
736 | ||
737 | -- Implement terminal deletion, i.e., deleting local frames, closing | |
738 | the tty device and restoring its previous state without exiting | |
739 | Emacs. | |
9628b887 | 740 | |
fca177d4 KL |
741 | (Done, but at the moment only called when an error happens during |
742 | initialization. There is a memory corruption error around this | |
daf01701 | 743 | somewhere.) (Update: now it is fully enabled.) |
fca177d4 | 744 | |
8303ba32 KL |
745 | -- Implement automatic deletion of terminals when the last frame on |
746 | that terminal is closed. | |
747 | ||
748 | (Done.) | |
749 | ||
0a125897 KL |
750 | -- Restore tty screen after closing the terminal. |
751 | ||
752 | (Done, we do the same as Emacs 21.2 for all terminals.) | |
753 | ||
754 | -- 'TERM=dumb src/emacs' does not restore the terminal state. | |
114a8b8c | 755 | |
0a125897 | 756 | (Done.) |
fca177d4 | 757 | |
b2af72d2 KL |
758 | -- C-g should work on secondary terminals. |
759 | ||
760 | (Done, but the binding is not configurable.) | |
761 | ||
762 | -- Deal with SIGHUP in Emacs and in emacsclient. (After this, the | |
763 | server-frames may be removed from server.el.) | |
764 | ||
765 | (Done, nothing to do. It seems that Emacs does not receive SIGHUP | |
daf01701 | 766 | from secondary ttys, which is actually a good thing.) (Update: I |
7b00d185 | 767 | think it would be a bad idea to remove server-frames.) |
b2af72d2 | 768 | |
daf01701 | 769 | -- Change emacsclient/server.el to support the -t argument better, |
b2af72d2 KL |
770 | i.e. automatically close the socket when the frame is closed. |
771 | ||
772 | (Seems to be working OK.) | |
773 | ||
16c290d8 | 774 | -- Fix mysterious memory corruption error with tty deletion. To |
fca177d4 KL |
775 | trigger it, try the following shell command: |
776 | ||
777 | while true; do TERM=no-such-terminal-definition emacsclient -h; done | |
778 | ||
779 | Emacs usually dumps core after a few dozen iterations. (The bug | |
3224dac1 | 780 | seems to be related to the xfreeing or bzeroing of |
9d9f1812 KL |
781 | tty_output.Wcm. Maybe there are outside references to struct Wcm? |
782 | Why were these vars collected into a struct before multi-tty | |
783 | support?) | |
fca177d4 | 784 | |
16c290d8 KL |
785 | (Done. Whew. It turned out that the problem had nothing to do |
786 | with hypothetical external references to Wcm, or any other | |
787 | tty_output component; it was simply that delete_tty closed the | |
788 | filehandles of secondary ttys twice, resulting in fclose doubly | |
3224dac1 | 789 | freeing memory. Utterly trivial matter. I love the C's memory |
16c290d8 KL |
790 | management, it puts hair on your chest.) |
791 | ||
819b8f00 | 792 | -- Support raw secondary terminals. (Note that SIGIO works only on |
3224dac1 | 793 | the controlling terminal.) Hint: extend read_input_waiting for |
819b8f00 | 794 | multiple ttys and hopefully this will be fixed. |
fca177d4 | 795 | |
819b8f00 KL |
796 | (Done, it seems to have been working already for some time. It |
797 | seems F_SETOWN does work, after all. Not sure what made it fail | |
798 | earlier, but it seems to be fixed (there were several changes | |
799 | around request_sigio, maybe one of them did it). | |
3224dac1 | 800 | read_input_waiting is only used in sys_select, don't change |
daf01701 | 801 | it.) (Update: After adding X support, it's broken again.) |
d3c554a0 | 802 | (Update^2: No it isn't.) :-) |
c1c63edb | 803 | |
819b8f00 | 804 | -- Find out why does Emacs abort when it wants to close its |
0a125897 | 805 | controlling tty. Hint: chan_process[] array. Hey, maybe |
16c290d8 KL |
806 | noninterrupt-IO would work, too? Update: no, there is no process |
807 | for stdin/out. | |
c33d2d42 | 808 | |
819b8f00 KL |
809 | (Done. Added add/delete_keyboard_wait_descriptor to |
810 | term_init/delete_tty. The hint was right, in a way.) | |
6548cf00 | 811 | |
819b8f00 | 812 | -- Issue with SIGIO: it needs to be disabled during redisplay. See if |
3224dac1 | 813 | fcntl kernel behaviour could be emulated by emacsclient. |
0a125897 | 814 | |
819b8f00 | 815 | (Done. Simply disabled the SIGIO emulation hack in emacsclient.) |
d3c554a0 | 816 | (Update: it was added back.) (Update^2: and removed again.) |
22de1e79 | 817 | |
819b8f00 | 818 | -- server.el: There are issues with saving files in buffers of closed |
16c290d8 KL |
819 | clients. Try editing a file with emacsclient -f, and (without |
820 | saving it) do a delete-frame. The frame is closed without | |
821 | question, and a surprising confirmation prompt appears in another | |
822 | frame. | |
823 | ||
819b8f00 KL |
824 | (Done. delete-frame now asks for confirmation if it still has |
825 | pending buffers, and modified buffers don't seem to be deleted.) | |
826 | ||
827 | -- emacsclient.el, server.el: Handle eval or file open errors when | |
daf01701 | 828 | doing -t. |
16c290d8 | 829 | |
819b8f00 | 830 | (Done.) |
22de1e79 | 831 | |
819b8f00 KL |
832 | -- Make parts of struct tty_output accessible from Lisp. The device |
833 | name and the type is sufficient. | |
22de1e79 | 834 | |
819b8f00 KL |
835 | (Done, see frame-tty-name and frame-tty-type.) |
836 | ||
837 | -- Export delete_tty to the Lisp environment, for emacsclient. | |
22de1e79 | 838 | |
819b8f00 KL |
839 | (Done, see delete-tty.) |
840 | ||
daf01701 KL |
841 | -- Get rid of the accessor macros in termchar.h, or define macros for |
842 | all members. | |
843 | ||
844 | (Done.) | |
845 | ||
846 | -- Move device-specific parameters (like costs) commonly used by | |
847 | device backends to a common, device-dependent structure. | |
848 | ||
849 | (Done. See struct display_method in termhooks.h.) | |
850 | ||
851 | -- Fix X support. | |
852 | ||
853 | (Done. Well, it seems to be working.) | |
854 | ||
855 | -- Allow simultaneous X and tty frames. (Handling input could be | |
856 | tricky. Or maybe not.) | |
857 | ||
858 | (Done. Allowed, that is. It is currently extremely unstable, to | |
859 | the point of being unusable. The rif variable causes constant | |
860 | core dumps. Handling input is indeed tricky.) | |
819b8f00 | 861 | |
7b00d185 | 862 | -- Rewrite multi-tty input in terms of MULTI_KBOARD. |
28d440ab | 863 | |
7b00d185 KL |
864 | (Done. In fact, there was no need to rewrite anything, I just |
865 | added a kboard member to tty_display_info, and initialized the | |
866 | frame's kboard from there.) | |
819b8f00 | 867 | |
fa971ac3 KL |
868 | -- Fix rif issue with X-tty combo sessions. IMHO the best thing to do |
869 | is to get rid of that global variable (and use the value value in | |
870 | display_method, which is guaranteed to be correct). | |
871 | ||
872 | (Done, did exactly that. Core dumps during combo sessions became | |
873 | much rarer. In fact, I have not yet met a single one.) | |
874 | ||
17086732 KL |
875 | -- Add multi-tty support to talk.el. |
876 | ||
877 | (Done.) | |
878 | ||
428a555e KL |
879 | -- Clean up the source of emacsclient. It is a mess. |
880 | ||
881 | (Done, eliminated stupid proxy-pty kludge.) | |
882 | ||
883 | -- Fix faces on tty frames during X-tty combo sessions. There is an | |
884 | init_frame_faces call in init_sys_modes, see if there is a problem | |
885 | with it. | |
886 | ||
887 | (Done, there was a stupid mistake in | |
888 | Ftty_supports_face_attributes_p. Colors are broken, though.) | |
889 | ||
890 | -- C-x 5 2, C-x 5 o, C-x 5 0 on an emacsclient frame unexpectedly | |
891 | exits emacsclient. This is a result of trying to be clever with | |
892 | delete-frame-functions. | |
893 | ||
894 | (Fixed, added delete-tty-after-functions, and changed server.el to | |
895 | use it.) | |
896 | ||
897 | -- Something with (maybe) multi-keyboard support broke function keys | |
898 | and arrows on ttys during X+tty combo sessions. Debug this. | |
899 | ||
900 | (I can't reproduce it, maybe the terminal type was wrong.) | |
901 | ||
902 | -- Fix input from raw ttys (again). | |
903 | ||
904 | (Now it seems to work all right.) | |
905 | ||
906 | -- During an X-tty combo session, a (message "Hello") from a tty frame | |
907 | goes to the X frame. Fix this. | |
908 | ||
909 | (Done. There was a safeguard against writing to the initial | |
910 | terminal frame during bootstrap which prevented echo_area_display | |
911 | from working correctly on a tty frame during a combo session.) | |
912 | ||
114a8b8c | 913 | -- If there are no frames on its controlling terminal, Emacs should |
d3c554a0 | 914 | exit if the user presses C-c there. |
114a8b8c KL |
915 | |
916 | (Done, as far as possible. See the SIGTERM comment in | |
917 | interrupt_signal on why this seems to be impossible to solve this | |
918 | in general.) | |
919 | ||
920 | -- During an X session, Emacs seems to read from stdin. Also, Emacs | |
921 | fails to start without a controlling tty. | |
922 | ||
923 | (Fixed by replacing the troublesome termcap display with a dummy | |
924 | bootstrap display during bootstrap. | |
925 | ||
926 | -- Do tty output through struct display, like graphical display | |
927 | backends. | |
928 | ||
929 | (Done.) | |
930 | ||
931 | -- Define an output_initial value for output_method for the initial | |
932 | frame that is dumped with Emacs. Checking for this frame (e.g. in | |
933 | cmd_error_internal) is ugly. | |
934 | ||
935 | (Done, broking interactive temacs.) | |
936 | ||
937 | -- The command `emacsclient -t -e '(delete-frame)'' fails to exit. | |
938 | ||
939 | (Fixed.) | |
940 | ||
4ca927b4 KL |
941 | -- frame-creation-function should always create a frame that is on the |
942 | same display as the selected frame. Maybe frame-creation-function | |
943 | should simply be removed and make-frame changed to do the right | |
944 | thing. | |
945 | ||
946 | (Done, with a nice hack. frame-creation-function is now frame-local.) | |
947 | ||
948 | -- Fix C-g on raw ttys. | |
949 | ||
950 | (Done. I disabled the interrupt/quit keys on all secondary | |
951 | terminals, so Emacs sees C-g as normal input. This looks like an | |
952 | overkill, because emacsclient has extra code to pass SIGINT to | |
953 | Emacs, so C-g should remain the interrupt/quit key on emacsclient | |
954 | frames. See the next entry why implementing this distinction would | |
955 | be a bad idea.) | |
956 | ||
957 | -- Make sure C-g goes to the right frame with ttys. This is hard, as | |
958 | SIGINT doesn't have a tty parameter. :-( | |
959 | ||
960 | (Done, the previous change fixes this as a pleasant side effect.) | |
961 | ||
c0707982 KL |
962 | -- I have seen a case when Emacs with multiple ttys fell into a loop |
963 | eating 100% of CPU time. Strace showed this loop: | |
964 | ||
965 | getpid() = 30284 | |
966 | kill(30284, SIGIO) = 0 | |
967 | --- SIGIO (I/O possible) @ 0 (0) --- | |
968 | ioctl(6, FIONREAD, [0]) = -1 EIO (Input/output error) | |
969 | ioctl(5, FIONREAD, [0]) = -1 EIO (Input/output error) | |
970 | ioctl(0, FIONREAD, [0]) = 0 | |
971 | sigreturn() = ? (mask now []) | |
972 | gettimeofday({1072842297, 747760}, NULL) = 0 | |
973 | gettimeofday({1072842297, 747806}, NULL) = 0 | |
974 | select(9, [0 3 5 6], NULL, NULL, {0, 0}) = 2 (in [5 6], left {0, 0}) | |
975 | select(9, [0 3 5 6], NULL, NULL, {0, 0}) = 2 (in [5 6], left {0, 0}) | |
976 | gettimeofday({1072842297, 748245}, NULL) = 0 | |
977 | ||
978 | I have seen something similar with a single X frame, but have not | |
979 | been able to reproduce it for debugging. | |
980 | ||
981 | Update: This may have been caused by checking for nread != 0 | |
982 | instead of nread > 0 after calling read_socket_hook in | |
983 | read_avail_input. | |
984 | ||
985 | (Fixed. This was caused by unconditionally including stdin in | |
986 | input_wait_mask in init_process. The select call in | |
987 | wait_reading_process_input always returned immediately, indicating | |
988 | that there is pending input from stdin, which nobody read. | |
989 | ||
990 | Note that the above strace output seems to be an unrelated but | |
991 | similar bug. I think that is now fixed.) | |
4ca927b4 | 992 | |
2246281f KL |
993 | -- Exiting Emacs while there are emacsclient frames doesn't restore the |
994 | ttys to their default states. | |
995 | ||
996 | (This seems to be fixed by some previous change.) | |
997 | ||
998 | -- Allow opening an X session after -nw. | |
999 | ||
1000 | (Done.) | |
1001 | ||
d448e982 KL |
1002 | -- Fix color handling during tty+X combo sessions. (It seems that tty |
1003 | sessions automatically convert the face colors to terminal colors | |
1004 | when the face is loaded. This conversion must happen instead on | |
1005 | the fly in write_glyphs, which might be problematic, as color | |
1006 | approximation is currently done in lisp (term/tty-colors.el).) | |
1007 | (Update: hm, colors seem to work fine if I start emacs with -nw and | |
1008 | then create an X frame. Maybe it's just a small buglet somewhere.) | |
1009 | ||
1010 | (Seems to be fixed. The problem was in startup.el, it did not | |
1011 | initialize tty colors when the initial window system was | |
1012 | graphical.) | |
2246281f | 1013 | |
2441679b KL |
1014 | -- emacs -nw --eval '(y-or-n-p "Foobar")' segfaults. (Reported by |
1015 | Romain Francoise) | |
1016 | ||
1017 | (Fixed, there was a keyboard initialization problem.) | |
1018 | ||
3bbdbec9 KL |
1019 | -- Fix interactive use of temacs. There are face-related SEGVs, most |
1020 | likely because of changes in realize_default_face, realize_face. | |
1021 | ||
1022 | (Fixed.) | |
1023 | ||
bacb6689 KL |
1024 | -- Don't exit Emacs when the last X connection fails during a |
1025 | multi-display session. | |
1026 | ||
1027 | (Fixed.) | |
1028 | ||
0c72d684 KL |
1029 | -- Dan Nicolaescu noticed that starting emacsclient on the same |
1030 | terminal device that is the controlling tty of the Emacs process | |
1031 | gives unexpected results. | |
1032 | ||
1033 | (Fixed.) | |
1034 | ||
4edd8a5c KL |
1035 | -- Istvan Marko reported that Emacs hang on ttys if it was started |
1036 | from a shell script. | |
1037 | ||
1038 | (Fixed. There was a bug in the multi-tty version of | |
1039 | narrow_foreground_group. tcsetpgrp blocks if it is called from a | |
1040 | process that is not in the same process group as the tty.) | |
1041 | ||
2fc0cf2a KL |
1042 | -- emacsclient -t from an Emacs term buffer does not work, complains |
1043 | about face problems. This can even lock up Emacs (if the recursive | |
1044 | frame sets single_kboard). Update: the face problems are caused by | |
1045 | bugs in term.el, not in multi-tty. The lockup is caused by | |
d3c554a0 | 1046 | single_kboard mode, and is not easily resolvable. The best thing to |
2fc0cf2a KL |
1047 | do is to simply refuse to create a tty frame of type `eterm'. |
1048 | ||
1049 | (Fixed, changed emacsclient to check for TERM=eterm. The face | |
1050 | complaints seem to be caused by bugs in term.el; they are not | |
1051 | related to multi-tty.) | |
1052 | ||
0b0d3e0b KL |
1053 | -- Find out the best way to support suspending Emacs with multiple |
1054 | ttys. My guess: disable it on the controlling tty, but from other | |
1055 | ttys pass it on to emacsclient somehow. (It is (I hope) trivial to | |
1056 | extend emacsclient to handle suspend/resume. A `kill -STOP' almost | |
1057 | works right now.) | |
1058 | ||
1059 | (Done. I needed to play with signal handling and the server | |
1060 | protocol a bit to make emacsclient behave as a normal UNIX program | |
1061 | wrt foreground/background process groups.) | |
1062 | ||
eb1f46c9 KL |
1063 | -- There is a flicker during the startup of `emacs -nw'; it's as if |
1064 | the terminal is initialized, reset and then initialialized again. | |
1065 | Debug this. (Hint: narrow_foreground_group is called twice during | |
1066 | startup.) | |
1067 | ||
1068 | (This is gone.) | |
1069 | ||
026ad6ba KL |
1070 | -- Robert Chassell has found serious copy-paste bugs with the |
1071 | multi-tty branch. There seem to be redisplay bugs while copying | |
1072 | from X to a terminal frame. Copying accented characters do not | |
1073 | work for me. | |
1074 | ||
1075 | (Patch-124 should fix this, by changing the interprogram-*-function | |
1076 | variables to be frame-local, as suggested by Mark Plaksin | |
1077 | (thanks!). I think that the redisplay bugs are in fact not bugs, | |
1078 | but delays caused by single_kboard --> perhaps MULTI_KBOARD should | |
1079 | be removed.) | |
1080 | ||
2cd1371d KL |
1081 | -- frame-creation-function was removed, which might be a bad idea. |
1082 | Think up a compatible solution. | |
1083 | ||
1084 | (It was an internal interface that may be changed when necessary.) | |
1085 | ||
1086 | -- Change Lisp code not to (getenv "TERM"); use the `tty-type' frame | |
1087 | parameter or the frame-tty-type function instead. (M-x tags-search | |
1088 | "TERM" helps with this.) Update: Actually, all getenv invocations | |
1089 | should be checked for multi-tty compatibility, and an interface | |
1090 | must be implemented to get the remote client's environment. | |
1091 | ||
1092 | (Done. Only getenv calls in lisp/term/*.el were changed; other | |
1093 | calls should be mostly left as they are.) | |
1094 | ||
1095 | -- Add an elaborate mechanism for display-local variables. (There are | |
1096 | already a few of these; search for `terminal-local' in the Elisp | |
1097 | manual.) | |
1098 | ||
1099 | (Not needed. Display-local variables could be emulated by | |
1100 | frame-local variables.) | |
026ad6ba | 1101 | |
d4d89d37 KL |
1102 | -- Emacs assumes that all terminal frames have the same locale |
1103 | settings as Emacs itself. This may lead to bogus results in a | |
1104 | multi-locale setup. (E.g., while logging in from a remote client | |
1105 | with a different locale.) | |
1106 | (Update after new bugreport by Friedrich Delgado Friedrichs: | |
1107 | (at least) the structs terminal_coding and keyboard_coding in | |
1108 | coding.c must be moved to struct display, and the Lisp interface | |
1109 | [set-]keyboard-coding-system must be adapted for the change.) | |
1110 | ||
1111 | (Fixed. Emacs now uses the locale settings as seen by the | |
1112 | emacsclient process for server tty frames.) | |
68bba4e4 | 1113 | (Update: Not really; Vlocale_coding_system is still global.) |
b6660415 KL |
1114 | |
1115 | -- Make `struct display' accessible to Lisp programs. Accessor functions: | |
1116 | ||
1117 | (displayp OBJECT): Returns t if OBJECT is a display. | |
1118 | => Implemented as display-live-p. | |
1119 | ||
1120 | (display-list): Returns list of currently active displays. | |
1121 | => Implemented. | |
1122 | ||
1123 | (selected-display): Returns the display object of the selected frame. | |
1124 | => Not strictly necessary, but implemented anyway. | |
1125 | ||
1126 | (frame-display FRAME): Returns the display object of FRAME. | |
1127 | => Implemented. | |
1128 | ||
1129 | (display-frames DISPLAY): Returns a list of frames on DISPLAY. | |
1130 | => Already implemented, see frames-on-display-list. | |
1131 | ||
1132 | (display-type DISPLAY): Returns the type of DISPLAY, as a | |
1133 | symbol. (See `framep'.) | |
1134 | => Implemented as display-live-p. | |
1135 | ||
1136 | (display-device DISPLAY): Returns the name of the device that | |
1137 | DISPLAY uses, as a string. (E.g: "/dev/pts/16", or | |
1138 | ":0.0") | |
1139 | => Implemented as display-name. | |
1140 | ||
1141 | etc. | |
1142 | ||
1143 | See next issue why this is necessary. | |
1144 | ||
1145 | (Update: The consensus on emacs-devel seems to be to do this via | |
1146 | integer identifiers. That's fine by me.) | |
1147 | ||
1148 | (Done.) | |
1149 | ||
1150 | -- The following needs to be supported: | |
1151 | ||
1152 | $ emacsclient -t | |
1153 | C-z | |
1154 | $ emacsclient -t | |
1155 | (This fails now.) | |
1156 | ||
1157 | The cleanest way to solve this is to allow multiple displays on the | |
1158 | same terminal device; each new emacsclient process should create | |
1159 | its own display. As displays are currently identified by their | |
1160 | device names, this is not possible until struct display becomes | |
1161 | accessible as a Lisp-level object. | |
1162 | ||
1163 | (Done.) | |
1164 | ||
856dd475 KL |
1165 | -- Miles Bader suggests that C-x C-c on an emacsclient frame should |
1166 | only close the frame, not exit the entire Emacs session. Update: | |
1167 | see above for a function that does this. Maybe this should be the | |
1168 | new default? | |
1169 | ||
1170 | (Done. This is the new default. No complaints so far.) | |
1171 | ||
68bba4e4 KL |
1172 | -- Clean up the frame-local variable system. I think it's ugly and |
1173 | error-prone. But maybe I just haven't yet fully understood it. | |
1174 | ||
1175 | (Nothing to do. It doesn't seem ugly any more. It's rather clever.) | |
856dd475 | 1176 | |
97c57fb2 KL |
1177 | -- Support multiple character locales. A version of |
1178 | `set-locale-environment' needs to be written for setting up | |
1179 | display-local settings on ttys. I think calling | |
1180 | set-display-table-and-terminal-coding-system and | |
1181 | set-keyboard-coding-system would be enough. The language | |
1182 | environment itself should remain a global setting. | |
1183 | ||
1184 | (Done, by an ugly hack.) | |
1185 | ||
1fb8c4ad KL |
1186 | -- The terminal customization files in term/*.el tend to change global |
1187 | parameters, which may confuse Emacs with multiple displays. Change | |
1188 | them to tweak only frame-local settings, if possible. (They tend | |
1189 | to call define-key to set function key sequences a lot.) | |
1190 | ||
1191 | (Done, by making `function-key-map' terminal-local (i.e., part of | |
1192 | struct kboard). This has probably covered all the remaining problems.) | |
1193 | ||
2a42d440 KL |
1194 | -- Make `function-key-map' and `key-translation-map' terminal-local. |
1195 | ||
1196 | (Done.) | |
1197 | ||
1198 | -- Implement `terminal-local-value' and `set-terminal-local-value' to | |
1199 | allow deterministic access to terminal local bindings. The | |
1200 | encode-kb package can not set up `key-translation-map' without | |
1201 | these. The terminal-local bindings seem to be independent of what | |
1202 | frame is selected. | |
1203 | ||
1204 | (Done.) | |
5b65d888 | 1205 | |
2a42d440 | 1206 | |
28d440ab | 1207 | ;;; arch-tag: 8da1619e-2e79-41a8-9ac9-a0485daad17d |
2a42d440 | 1208 |