|
1
|
1 /* |
|
|
2 |
|
2847
|
3 Copyright (C) 1996, 1997 John W. Eaton |
|
1
|
4 |
|
|
5 This file is part of Octave. |
|
|
6 |
|
|
7 Octave is free software; you can redistribute it and/or modify it |
|
|
8 under the terms of the GNU General Public License as published by the |
|
|
9 Free Software Foundation; either version 2, or (at your option) any |
|
|
10 later version. |
|
|
11 |
|
|
12 Octave is distributed in the hope that it will be useful, but WITHOUT |
|
|
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
|
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
|
15 for more details. |
|
|
16 |
|
|
17 You should have received a copy of the GNU General Public License |
|
|
18 along with Octave; see the file COPYING. If not, write to the Free |
|
1315
|
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
|
1
|
20 |
|
|
21 */ |
|
|
22 |
|
240
|
23 #ifdef HAVE_CONFIG_H |
|
1192
|
24 #include <config.h> |
|
1
|
25 #endif |
|
|
26 |
|
3503
|
27 #include <fstream> |
|
1755
|
28 #include <string> |
|
1
|
29 |
|
2926
|
30 #include "cmd-edit.h" |
|
|
31 #include "oct-env.h" |
|
2101
|
32 |
|
1
|
33 #include "procstream.h" |
|
|
34 |
|
2492
|
35 #include <defaults.h> |
|
1352
|
36 #include "defun.h" |
|
|
37 #include "error.h" |
|
2164
|
38 #include "gripes.h" |
|
2110
|
39 #include "input.h" |
|
1755
|
40 #include "oct-obj.h" |
|
1352
|
41 #include "pager.h" |
|
990
|
42 #include "sighandlers.h" |
|
2100
|
43 #include "unwind-prot.h" |
|
2201
|
44 #include "utils.h" |
|
2368
|
45 #include "variables.h" |
|
2093
|
46 |
|
2209
|
47 static pid_t octave_pager_pid = -1; |
|
1
|
48 |
|
2093
|
49 // Our actual connection to the external pager. |
|
|
50 static oprocstream *external_pager = 0; |
|
1
|
51 |
|
3018
|
52 // TRUE means we write to the diary file. |
|
|
53 static bool write_to_diary_file = false; |
|
581
|
54 |
|
|
55 // The name of the current diary file. |
|
3523
|
56 static std::string diary_file; |
|
581
|
57 |
|
|
58 // The diary file. |
|
3523
|
59 static std::ofstream external_diary_file; |
|
581
|
60 |
|
2164
|
61 // The shell command to run as the pager. |
|
3523
|
62 static std::string Vpager_binary; |
|
2164
|
63 |
|
|
64 // TRUE means that if output is going to the pager, it is sent as soon |
|
|
65 // as it is available. Otherwise, it is buffered and only sent to the |
|
|
66 // pager when it is time to print another prompt. |
|
|
67 static bool Vpage_output_immediately; |
|
|
68 |
|
|
69 // TRUE means all output intended for the screen should be passed |
|
|
70 // through the pager. |
|
|
71 static bool Vpage_screen_output; |
|
|
72 |
|
2705
|
73 // Only one pager can be active at once, so having these at file |
|
|
74 // scope should be ok. |
|
|
75 static octave_interrupt_handler saved_interrupt_handler; |
|
|
76 static bool interrupt_handler_saved = false; |
|
2093
|
77 |
|
3018
|
78 static bool really_flush_to_pager = false; |
|
2100
|
79 |
|
3018
|
80 static bool flushing_output_to_pager = false; |
|
2206
|
81 |
|
2093
|
82 static void |
|
2197
|
83 clear_external_pager (void) |
|
|
84 { |
|
2210
|
85 octave_child_list::remove (octave_pager_pid); |
|
|
86 |
|
2197
|
87 octave_pager_pid = -1; |
|
|
88 |
|
|
89 delete external_pager; |
|
|
90 external_pager = 0; |
|
|
91 |
|
2705
|
92 if (interrupt_handler_saved) |
|
2197
|
93 { |
|
2554
|
94 octave_set_interrupt_handler (saved_interrupt_handler); |
|
2705
|
95 interrupt_handler_saved = false; |
|
2197
|
96 } |
|
|
97 } |
|
|
98 |
|
|
99 static void |
|
2209
|
100 pager_death_handler (pid_t pid, int status) |
|
|
101 { |
|
|
102 if (pid > 0) |
|
|
103 { |
|
|
104 if (WIFEXITED (status) || WIFSIGNALLED (status)) |
|
|
105 { |
|
2795
|
106 // Avoid warning() or error(), since that will put us back in |
|
|
107 // the pager, which would be bad news. |
|
2209
|
108 |
|
3531
|
109 std::cerr << "warning: connection to external pager (pid = " |
|
2795
|
110 << pid << ") lost --\n" |
|
|
111 << "warning: attempting to finish pending computations...\n"; |
|
2209
|
112 } |
|
|
113 } |
|
|
114 } |
|
|
115 |
|
|
116 static void |
|
3233
|
117 do_sync (const char *msg, int len, bool bypass_pager) |
|
1
|
118 { |
|
3233
|
119 if (msg && len > 0) |
|
1
|
120 { |
|
2206
|
121 if (bypass_pager) |
|
2646
|
122 { |
|
3531
|
123 std::cout.write (msg, len); |
|
|
124 std::cout.flush (); |
|
2646
|
125 } |
|
2206
|
126 else |
|
2093
|
127 { |
|
2206
|
128 if (! external_pager) |
|
2093
|
129 { |
|
3523
|
130 std::string pgr = Vpager_binary; |
|
2093
|
131 |
|
2206
|
132 if (! pgr.empty ()) |
|
|
133 { |
|
2554
|
134 saved_interrupt_handler = octave_ignore_interrupts (); |
|
2705
|
135 interrupt_handler_saved = true; |
|
2093
|
136 |
|
2206
|
137 external_pager = new oprocstream (pgr.c_str ()); |
|
2093
|
138 |
|
2206
|
139 if (external_pager) |
|
2209
|
140 { |
|
|
141 octave_pager_pid = external_pager->pid (); |
|
|
142 |
|
|
143 octave_child_list::insert (octave_pager_pid, |
|
|
144 pager_death_handler); |
|
|
145 } |
|
2093
|
146 } |
|
2206
|
147 } |
|
2101
|
148 |
|
2206
|
149 if (external_pager) |
|
|
150 { |
|
|
151 if (octave_pager_pid > 0 && external_pager->good ()) |
|
2101
|
152 { |
|
3233
|
153 external_pager->write (msg, len); |
|
2101
|
154 |
|
2206
|
155 // These checks are needed if a signal handler |
|
|
156 // invoked since the last set of checks attempts |
|
|
157 // to flush output and then returns |
|
2197
|
158 |
|
2206
|
159 if (octave_pager_pid > 0 |
|
|
160 && external_pager |
|
|
161 && external_pager->good ()) |
|
|
162 external_pager->flush (); |
|
2101
|
163 } |
|
2795
|
164 else |
|
|
165 { |
|
|
166 // We had a pager, but it must have died. Restore |
|
|
167 // the interrupt state so we can escape back to the |
|
|
168 // prompt if there are lots of computations pending. |
|
|
169 |
|
|
170 if (interrupt_handler_saved) |
|
|
171 { |
|
|
172 octave_set_interrupt_handler (saved_interrupt_handler); |
|
|
173 interrupt_handler_saved = false; |
|
|
174 } |
|
|
175 } |
|
2093
|
176 } |
|
2206
|
177 else |
|
2646
|
178 { |
|
3531
|
179 std::cout.write (msg, len); |
|
|
180 std::cout.flush (); |
|
2646
|
181 } |
|
2093
|
182 } |
|
1
|
183 } |
|
|
184 } |
|
|
185 |
|
3233
|
186 // Assume our terminal wraps long lines. |
|
|
187 |
|
2101
|
188 static bool |
|
3233
|
189 more_than_a_screenful (const char *s, int len) |
|
2101
|
190 { |
|
|
191 if (s) |
|
|
192 { |
|
2926
|
193 int available_rows = command_editor::terminal_rows () - 2; |
|
2101
|
194 |
|
3233
|
195 int cols = command_editor::terminal_cols (); |
|
|
196 |
|
2103
|
197 int count = 0; |
|
|
198 |
|
3233
|
199 int chars_this_line = 0; |
|
2101
|
200 |
|
3233
|
201 for (int i = 0; i < len; i++) |
|
|
202 { |
|
|
203 if (*s++ == '\n') |
|
|
204 { |
|
|
205 count += chars_this_line / cols + 1; |
|
|
206 chars_this_line = 0; |
|
|
207 } |
|
|
208 else |
|
|
209 chars_this_line++; |
|
|
210 } |
|
2101
|
211 |
|
3233
|
212 if (count > available_rows) |
|
|
213 return true; |
|
2101
|
214 } |
|
|
215 |
|
|
216 return false; |
|
|
217 } |
|
|
218 |
|
2093
|
219 int |
|
|
220 octave_pager_buf::sync (void) |
|
|
221 { |
|
2186
|
222 if (! interactive |
|
|
223 || really_flush_to_pager |
|
2164
|
224 || (Vpage_screen_output && Vpage_output_immediately) |
|
|
225 || ! Vpage_screen_output) |
|
2100
|
226 { |
|
3233
|
227 char *buf = eback (); |
|
2093
|
228 |
|
3233
|
229 int len = pptr () - buf; |
|
2100
|
230 |
|
2110
|
231 bool bypass_pager = (! interactive |
|
2164
|
232 || ! Vpage_screen_output |
|
2110
|
233 || (really_flush_to_pager |
|
2164
|
234 && Vpage_screen_output |
|
|
235 && ! Vpage_output_immediately |
|
3233
|
236 && ! more_than_a_screenful (buf, len))); |
|
2475
|
237 |
|
3233
|
238 if (len > 0) |
|
|
239 { |
|
|
240 do_sync (buf, len, bypass_pager); |
|
2093
|
241 |
|
3870
|
242 flush_current_contents_to_diary (); |
|
3233
|
243 |
|
3870
|
244 seekoff (0, std::ios::beg); |
|
3233
|
245 } |
|
2100
|
246 } |
|
2093
|
247 |
|
|
248 return 0; |
|
|
249 } |
|
|
250 |
|
3477
|
251 void |
|
|
252 octave_pager_buf::flush_current_contents_to_diary (void) |
|
|
253 { |
|
3756
|
254 char *buf = eback () + diary_skip; |
|
3477
|
255 |
|
3756
|
256 size_t len = pptr () - buf; |
|
3477
|
257 |
|
|
258 octave_diary.write (buf, len); |
|
3756
|
259 |
|
3870
|
260 diary_skip = 0; |
|
3756
|
261 } |
|
|
262 |
|
|
263 void |
|
|
264 octave_pager_buf::set_diary_skip (void) |
|
|
265 { |
|
|
266 diary_skip = pptr () - eback (); |
|
3477
|
267 } |
|
|
268 |
|
2093
|
269 int |
|
|
270 octave_diary_buf::sync (void) |
|
|
271 { |
|
3233
|
272 if (write_to_diary_file && external_diary_file) |
|
|
273 { |
|
3870
|
274 char *buf = eback (); |
|
|
275 |
|
|
276 int len = pptr () - buf; |
|
2093
|
277 |
|
3233
|
278 if (len > 0) |
|
3870
|
279 external_diary_file.write (buf, len); |
|
3233
|
280 } |
|
2093
|
281 |
|
3544
|
282 seekoff (0, std::ios::beg); |
|
2093
|
283 |
|
|
284 return 0; |
|
|
285 } |
|
|
286 |
|
|
287 octave_pager_stream *octave_pager_stream::instance = 0; |
|
|
288 |
|
3775
|
289 octave_pager_stream::octave_pager_stream (void) : std::ostream (0), pb (0) |
|
1
|
290 { |
|
2093
|
291 pb = new octave_pager_buf; |
|
|
292 rdbuf (pb); |
|
|
293 setf (unitbuf); |
|
|
294 } |
|
|
295 |
|
|
296 octave_pager_stream::~octave_pager_stream (void) |
|
|
297 { |
|
|
298 flush (); |
|
|
299 delete pb; |
|
|
300 } |
|
|
301 |
|
|
302 octave_pager_stream& |
|
|
303 octave_pager_stream::stream (void) |
|
|
304 { |
|
|
305 if (! instance) |
|
|
306 instance = new octave_pager_stream (); |
|
2926
|
307 |
|
2093
|
308 return *instance; |
|
|
309 } |
|
|
310 |
|
3477
|
311 void |
|
|
312 octave_pager_stream::flush_current_contents_to_diary (void) |
|
|
313 { |
|
|
314 if (pb) |
|
|
315 pb->flush_current_contents_to_diary (); |
|
|
316 } |
|
|
317 |
|
3756
|
318 void |
|
|
319 octave_pager_stream::set_diary_skip (void) |
|
|
320 { |
|
|
321 if (pb) |
|
|
322 pb->set_diary_skip (); |
|
|
323 } |
|
|
324 |
|
2093
|
325 octave_diary_stream *octave_diary_stream::instance = 0; |
|
|
326 |
|
3775
|
327 octave_diary_stream::octave_diary_stream (void) : std::ostream (0), db (0) |
|
2093
|
328 { |
|
|
329 db = new octave_diary_buf; |
|
|
330 rdbuf (db); |
|
|
331 setf (unitbuf); |
|
|
332 } |
|
|
333 |
|
|
334 octave_diary_stream::~octave_diary_stream (void) |
|
|
335 { |
|
|
336 flush (); |
|
|
337 delete db; |
|
|
338 } |
|
|
339 |
|
|
340 octave_diary_stream& |
|
|
341 octave_diary_stream::stream (void) |
|
|
342 { |
|
|
343 if (! instance) |
|
|
344 instance = new octave_diary_stream (); |
|
|
345 |
|
|
346 return *instance; |
|
1
|
347 } |
|
|
348 |
|
|
349 void |
|
2093
|
350 flush_octave_stdout (void) |
|
1
|
351 { |
|
2206
|
352 if (! flushing_output_to_pager) |
|
|
353 { |
|
2985
|
354 unwind_protect::begin_frame ("flush_octave_stdout"); |
|
2100
|
355 |
|
3018
|
356 unwind_protect_bool (really_flush_to_pager); |
|
|
357 unwind_protect_bool (flushing_output_to_pager); |
|
2100
|
358 |
|
3018
|
359 really_flush_to_pager = true; |
|
|
360 flushing_output_to_pager = true; |
|
2206
|
361 |
|
|
362 octave_stdout.flush (); |
|
1
|
363 |
|
2206
|
364 if (external_pager) |
|
|
365 clear_external_pager (); |
|
2100
|
366 |
|
2985
|
367 unwind_protect::run_frame ("flush_octave_stdout"); |
|
2206
|
368 } |
|
1
|
369 } |
|
|
370 |
|
1965
|
371 static void |
|
2093
|
372 close_diary_file (void) |
|
1
|
373 { |
|
3477
|
374 // Try to flush the current buffer to the diary now, so that things |
|
|
375 // like |
|
|
376 // |
|
|
377 // function foo () |
|
|
378 // diary on; |
|
|
379 // ... |
|
|
380 // diary off; |
|
|
381 // endfunction |
|
|
382 // |
|
|
383 // will do the right thing. |
|
|
384 |
|
|
385 octave_stdout.flush_current_contents_to_diary (); |
|
|
386 |
|
2093
|
387 if (external_diary_file.is_open ()) |
|
1
|
388 { |
|
2093
|
389 octave_diary.flush (); |
|
|
390 external_diary_file.close (); |
|
1
|
391 } |
|
|
392 } |
|
|
393 |
|
581
|
394 static void |
|
|
395 open_diary_file (void) |
|
|
396 { |
|
2093
|
397 close_diary_file (); |
|
581
|
398 |
|
3756
|
399 // If there is pending output in the pager buf, it should not go |
|
|
400 // into the diary file. |
|
|
401 |
|
|
402 octave_stdout.set_diary_skip (); |
|
|
403 |
|
3544
|
404 external_diary_file.open (diary_file.c_str (), std::ios::app); |
|
581
|
405 |
|
2093
|
406 if (! external_diary_file) |
|
|
407 error ("diary: can't open diary file `%s'", diary_file.c_str ()); |
|
581
|
408 } |
|
|
409 |
|
1957
|
410 DEFUN_TEXT (diary, args, , |
|
3332
|
411 "-*- texinfo -*-\n\ |
|
|
412 @deffn {Command} diary options\n\ |
|
|
413 Create a list of all commands @emph{and} the output they produce, mixed\n\ |
|
|
414 together just as you see them on your terminal. Valid options are:\n\ |
|
|
415 \n\ |
|
|
416 @table @code\n\ |
|
|
417 @item on\n\ |
|
|
418 Start recording your session in a file called @file{diary} in your\n\ |
|
|
419 current working directory.\n\ |
|
581
|
420 \n\ |
|
3332
|
421 @item off\n\ |
|
|
422 Stop recording your session in the diary file.\n\ |
|
|
423 \n\ |
|
|
424 @item @var{file}\n\ |
|
|
425 Record your session in the file named @var{file}.\n\ |
|
|
426 @end table\n\ |
|
|
427 \n\ |
|
|
428 Without any arguments, @code{diary} toggles the current diary state.\n\ |
|
3333
|
429 @end deffn") |
|
581
|
430 { |
|
2086
|
431 octave_value_list retval; |
|
581
|
432 |
|
1755
|
433 int argc = args.length () + 1; |
|
|
434 |
|
1965
|
435 string_vector argv = args.make_argv ("diary"); |
|
581
|
436 |
|
1755
|
437 if (error_state) |
|
|
438 return retval; |
|
|
439 |
|
|
440 if (diary_file.empty ()) |
|
|
441 diary_file = "diary"; |
|
1306
|
442 |
|
581
|
443 switch (argc) |
|
|
444 { |
|
|
445 case 1: |
|
|
446 write_to_diary_file = ! write_to_diary_file; |
|
|
447 open_diary_file (); |
|
|
448 break; |
|
623
|
449 |
|
581
|
450 case 2: |
|
|
451 { |
|
3523
|
452 std::string arg = argv[1]; |
|
1755
|
453 |
|
|
454 if (arg == "on") |
|
581
|
455 { |
|
3018
|
456 write_to_diary_file = true; |
|
581
|
457 open_diary_file (); |
|
|
458 } |
|
1755
|
459 else if (arg == "off") |
|
2093
|
460 { |
|
|
461 close_diary_file (); |
|
3018
|
462 write_to_diary_file = false; |
|
2093
|
463 } |
|
581
|
464 else |
|
|
465 { |
|
1755
|
466 diary_file = arg; |
|
3176
|
467 write_to_diary_file = true; |
|
581
|
468 open_diary_file (); |
|
|
469 } |
|
|
470 } |
|
|
471 break; |
|
777
|
472 |
|
581
|
473 default: |
|
|
474 print_usage ("diary"); |
|
|
475 break; |
|
|
476 } |
|
|
477 |
|
|
478 return retval; |
|
|
479 } |
|
|
480 |
|
1957
|
481 DEFUN_TEXT (more, args, , |
|
3372
|
482 "-*- texinfo -*-\n\ |
|
|
483 @deffn {Command} more\n\ |
|
|
484 @deffnx {Command} more on\n\ |
|
|
485 @deffnx {Command} more off\n\ |
|
|
486 Turn output pagination on or off. Without an argument, @code{more}\n\ |
|
|
487 toggles the current state.\n\ |
|
|
488 @end deffn") |
|
1409
|
489 { |
|
2086
|
490 octave_value_list retval; |
|
1409
|
491 |
|
1755
|
492 int argc = args.length () + 1; |
|
|
493 |
|
1965
|
494 string_vector argv = args.make_argv ("more"); |
|
1755
|
495 |
|
|
496 if (error_state) |
|
|
497 return retval; |
|
1409
|
498 |
|
|
499 if (argc == 2) |
|
|
500 { |
|
3523
|
501 std::string arg = argv[1]; |
|
1409
|
502 |
|
1755
|
503 if (arg == "on") |
|
2448
|
504 bind_builtin_variable ("page_screen_output", 1.0); |
|
1755
|
505 else if (arg == "off") |
|
2448
|
506 bind_builtin_variable ("page_screen_output", 0.0); |
|
1409
|
507 else |
|
1755
|
508 error ("more: unrecognized argument `%s'", arg.c_str ()); |
|
1409
|
509 } |
|
|
510 else |
|
|
511 print_usage ("more"); |
|
|
512 |
|
|
513 return retval; |
|
|
514 } |
|
|
515 |
|
3536
|
516 static std::string |
|
2097
|
517 default_pager (void) |
|
|
518 { |
|
3523
|
519 std::string pager_binary = octave_env::getenv ("PAGER"); |
|
2097
|
520 |
|
3584
|
521 #ifdef OCTAVE_DEFAULT_PAGER |
|
2926
|
522 if (pager_binary.empty ()) |
|
2097
|
523 { |
|
3584
|
524 pager_binary = std::string (OCTAVE_DEFAULT_PAGER); |
|
2097
|
525 |
|
|
526 if (pager_binary == "less") |
|
|
527 { |
|
|
528 pager_binary.append (" -e"); |
|
|
529 |
|
3523
|
530 std::string lessflags = octave_env::getenv ("LESS"); |
|
2926
|
531 if (lessflags.empty ()) |
|
2097
|
532 pager_binary.append |
|
2099
|
533 (" -P'-- less ?pB(%pB\\%):--. (f)orward, (b)ack, (q)uit$'"); |
|
2097
|
534 } |
|
|
535 } |
|
|
536 #endif |
|
|
537 |
|
|
538 return pager_binary; |
|
|
539 } |
|
|
540 |
|
2164
|
541 static int |
|
|
542 pager_binary (void) |
|
|
543 { |
|
|
544 int status = 0; |
|
|
545 |
|
3523
|
546 std::string s = builtin_string_variable ("PAGER"); |
|
2164
|
547 |
|
|
548 if (s.empty ()) |
|
|
549 { |
|
|
550 gripe_invalid_value_specified ("PAGER"); |
|
|
551 status = -1; |
|
|
552 } |
|
|
553 else |
|
|
554 Vpager_binary = s; |
|
|
555 |
|
|
556 return status; |
|
|
557 } |
|
|
558 |
|
|
559 static int |
|
|
560 page_output_immediately (void) |
|
|
561 { |
|
|
562 Vpage_output_immediately = check_preference ("page_output_immediately"); |
|
|
563 |
|
|
564 return 0; |
|
|
565 } |
|
|
566 |
|
|
567 static int |
|
|
568 page_screen_output (void) |
|
|
569 { |
|
|
570 Vpage_screen_output = check_preference ("page_screen_output"); |
|
|
571 |
|
|
572 return 0; |
|
|
573 } |
|
|
574 |
|
2097
|
575 void |
|
|
576 symbols_of_pager (void) |
|
|
577 { |
|
3258
|
578 DEFVAR (PAGER, default_pager (), pager_binary, |
|
3372
|
579 "-*- texinfo -*-\n\ |
|
|
580 @defvr {Built-in Variable} PAGER\n\ |
|
|
581 The default value is normally @code{\"less\"}, @code{\"more\"}, or\n\ |
|
|
582 @code{\"pg\"}, depending on what programs are installed on your system.\n\ |
|
|
583 @xref{Installation}.\n\ |
|
|
584 \n\ |
|
|
585 When running interactively, Octave sends any output intended for your\n\ |
|
|
586 terminal that is more than one screen long to the program named by the\n\ |
|
|
587 value of the variable @code{PAGER}.\n\ |
|
|
588 @end defvr"); |
|
2097
|
589 |
|
3258
|
590 DEFVAR (page_output_immediately, 0.0, page_output_immediately, |
|
3372
|
591 "-*- texinfo -*-\n\ |
|
|
592 @defvr {Built-in Variable} page_output_immediately\n\ |
|
|
593 If the value of @code{page_output_immediately} is nonzero, Octave sends\n\ |
|
|
594 output to the pager as soon as it is available. Otherwise, Octave\n\ |
|
|
595 buffers its output and waits until just before the prompt is printed to\n\ |
|
|
596 flush it to the pager. The default value is 0.\n\ |
|
|
597 @end defvr"); |
|
2100
|
598 |
|
3258
|
599 DEFVAR (page_screen_output, 1.0, page_screen_output, |
|
3372
|
600 "-*- texinfo -*-\n\ |
|
|
601 @defvr {Built-in Variable} page_screen_output\n\ |
|
|
602 If the value of @code{page_screen_output} is nonzero, all output\n\ |
|
|
603 intended for the screen that is longer than one page is sent through a\n\ |
|
|
604 pager. This allows you to view one screenful at a time. Some pagers\n\ |
|
|
605 (such as @code{less}---see @ref{Installation}) are also capable of moving\n\ |
|
|
606 backward on the output. The default value is 1.\n\ |
|
|
607 @end defvr"); |
|
2097
|
608 } |
|
|
609 |
|
1
|
610 /* |
|
|
611 ;;; Local Variables: *** |
|
|
612 ;;; mode: C++ *** |
|
|
613 ;;; End: *** |
|
|
614 */ |
