aboutsummaryrefslogtreecommitdiffstats
path: root/com32/elflink/ldlinux/cli.c
blob: ebeaeecef6c352cb5da5af5960001739e3a638da (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <console.h>
#include <com32.h>
#include <syslinux/adv.h>
#include <syslinux/config.h>
#include <setjmp.h>
#include <netinet/in.h>
#include <limits.h>
#include <minmax.h>
#include <linux/list.h>
#include <sys/exec.h>
#include <sys/module.h>
#include <dprintf.h>
#include <core.h>

#include "getkey.h"
#include "menu.h"
#include "cli.h"
#include "config.h"

static struct list_head cli_history_head;

void clear_screen(void)
{
    //dprintf("enter");
    fputs("\033e\033%@\033)0\033(B\1#0\033[?25l\033[2J", stdout);
}

static int mygetkey_timeout(clock_t *kbd_to, clock_t *tto)
{
    clock_t t0, t1;
    int key;

    t0 = times(NULL);
    key = get_key(stdin, *kbd_to ? *kbd_to : *tto);

    /* kbdtimeout only applies to the first character */
    if (*kbd_to)
	*kbd_to = 0;

    t1 = times(NULL) - t0;
    if (*tto) {
	/* Timed out. */
	if (*tto <= (long long)t1)
	    key = KEY_NONE;
	else {
	    /* Did it wrap? */
	    if (*tto > totaltimeout)
		key = KEY_NONE;

	    *tto -= t1;
	}
    }

    return key;
}

static const char * cmd_reverse_search(int *cursor, clock_t *kbd_to,
				       clock_t *tto)
{
    int key;
    int i = 0;
    char buf[MAX_CMDLINE_LEN];
    const char *p = NULL;
    struct cli_command *last_found;
    struct cli_command *last_good = NULL;

    last_found = list_entry(cli_history_head.next, typeof(*last_found), list);

    memset(buf, 0, MAX_CMDLINE_LEN);

    eprintf("\033[1G\033[1;36m(reverse-i-search)`': \033[0m");
    while (1) {
	key = mygetkey_timeout(kbd_to, tto);

	if (key == KEY_CTRL('C')) {
	    return NULL;
	} else if (key == KEY_CTRL('R')) {
	    if (i == 0)
		continue; /* User typed nothing yet */
	    /* User typed 'CTRL-R' again, so try the next */
	    last_found = list_entry(last_found->list.next, typeof(*last_found), list);
	} else if (key >= ' ' && key <= 'z') {
	        buf[i++] = key;
	} else {
	    /* Treat other input chars as terminal */
	    break;
	}

	while (!list_is_last(&last_found->list, &cli_history_head)) {
	    p = strstr(last_found->command, buf);
	    if (p)
	        break;
	    last_found = list_entry(last_found->list.next, typeof(*last_found), list);
	}

	if (!p && !last_good) {
	    return NULL;
	} else if (!p) {
	    continue;
	} else {
	    last_good = last_found;
            *cursor = p - last_good->command;
	}

	eprintf("\033[?7l\033[?25l");
	/* Didn't handle the line wrap case here */
	eprintf("\033[1G\033[1;36m(reverse-i-search)\033[0m`%s': %s",
		buf, last_good->command ? : "");
	eprintf("\033[K\r");
    }

    return last_good ? last_good->command : NULL;
}



const char *edit_cmdline(const char *input, int top /*, int width */ ,
			 int (*pDraw_Menu) (int, int, int),
			 void (*show_fkey) (int))
{
    static char cmdline[MAX_CMDLINE_LEN];
    char temp_cmdline[MAX_CMDLINE_LEN] = { };
    int key, len, prev_len, cursor;
    int redraw = 1;		/* We enter with the menu already drawn */
    int x, y;
    bool done = false;
    const char *ret;
    int width = 0;
    struct cli_command *comm_counter = NULL;
    clock_t kbd_to = kbdtimeout;
    clock_t tto = totaltimeout;

    if (!width) {
	int height;
	if (getscreensize(1, &height, &width))
	    width = 80;
    }

    cmdline[MAX_CMDLINE_LEN - 1] = '\0';

    len = cursor = 0;
    prev_len = 0;
    x = y = 0;

    while (!done) {
	if (redraw > 1) {
	    /* Clear and redraw whole screen */
	    /* Enable ASCII on G0 and DEC VT on G1; do it in this order
	       to avoid confusing the Linux console */
	    clear_screen();
	    if (pDraw_Menu)
		    (*pDraw_Menu) (-1, top, 1);
	    prev_len = 0;
	    // printf("\033[0m\033[2J\033[H");
	}

	if (redraw > 0) {
	    int dy, at;

	    prev_len = max(len, prev_len);

	    /* Redraw the command line */
	    eprintf("\033[?7l\033[?25l");
	    if (y)
		eprintf("\033[%dA", y);
	    eprintf("\033[1G%s ", input);

	    x = strlen(input);
	    y = 0;
	    at = 0;
	    while (at < prev_len) {
		putchar(at >= len ? ' ' : cmdline[at]);
		at++;
		x++;
		if (x >= width) {
		    eprintf("\r\n");
		    x = 0;
		    y++;
		}
	    }
	    eprintf("\033[K\r");

	    dy = y - (cursor + strlen(input) + 1) / width;
	    x = (cursor + strlen(input) + 1) % width;

	    if (dy) {
		eprintf("\033[%dA", dy);
		y -= dy;
	    }
	    if (x)
		eprintf("\033[%dC", x);
	    eprintf("\033[?25h");
	    prev_len = len;
	    redraw = 0;
	}

	key = mygetkey_timeout(&kbd_to, &tto);

	switch (key) {
	case KEY_NONE:
	    /* We timed out. */
	    return NULL;

	case KEY_CTRL('L'):
	    redraw = 2;
	    break;

	case KEY_ENTER:
	case KEY_CTRL('J'):
	    ret = cmdline;
	    done = true;
	    break;

	case KEY_ESC:
	case KEY_CTRL('C'):
	    ret = NULL;
	    done = true;
	    break;

	case KEY_BACKSPACE:
	case KEY_DEL:
	    if (cursor) {
		memmove(cmdline + cursor - 1, cmdline + cursor,
			len - cursor + 1);
		len--;
		cursor--;
		redraw = 1;
	    }
	    break;

	case KEY_CTRL('D'):
	case KEY_DELETE:
	    if (cursor < len) {
		memmove(cmdline + cursor, cmdline + cursor + 1, len - cursor);
		len--;
		redraw = 1;
	    }
	    break;

	case KEY_CTRL('U'):
	    if (len) {
		len = cursor = 0;
		cmdline[len] = '\0';
		redraw = 1;
	    }
	    break;

	case KEY_CTRL('W'):
	    if (cursor) {
		int prevcursor = cursor;

		while (cursor && my_isspace(cmdline[cursor - 1]))
		    cursor--;

		while (cursor && !my_isspace(cmdline[cursor - 1]))
		    cursor--;

#if 0
		memmove(cmdline + cursor, cmdline + prevcursor,
			len - prevcursor + 1);
#else
		{
		    int i;
		    char *q = cmdline + cursor;
		    char *p = cmdline + prevcursor;
		    for (i = 0; i < len - prevcursor + 1; i++)
			*q++ = *p++;
		}
#endif
		len -= (prevcursor - cursor);
		redraw = 1;
	    }
	    break;

	case KEY_LEFT:
	case KEY_CTRL('B'):
	    if (cursor) {
		cursor--;
		redraw = 1;
	    }
	    break;

	case KEY_RIGHT:
	case KEY_CTRL('F'):
	    if (cursor < len) {
		putchar(cmdline[cursor]);
		cursor++;
		x++;
		if (x >= width) {
		    eprintf("\r\n");
		    y++;
		    x = 0;
		}
	    }
	    break;

	case KEY_CTRL('K'):
	    if (cursor < len) {
		cmdline[len = cursor] = '\0';
		redraw = 1;
	    }
	    break;

	case KEY_HOME:
	case KEY_CTRL('A'):
	    if (cursor) {
		cursor = 0;
		redraw = 1;
	    }
	    break;

	case KEY_END:
	case KEY_CTRL('E'):
	    if (cursor != len) {
		cursor = len;
		redraw = 1;
	    }
	    break;

	case KEY_F1:
	case KEY_F2:
	case KEY_F3:
	case KEY_F4:
	case KEY_F5:
	case KEY_F6:
	case KEY_F7:
	case KEY_F8:
	case KEY_F9:
	case KEY_F10:
	case KEY_F11:
	case KEY_F12:
	    if (show_fkey != NULL) {
		(*show_fkey) (key);
		redraw = 1;
	    }
	    break;
	case KEY_CTRL('P'):
	case KEY_UP:
	    {
		if (!list_empty(&cli_history_head)) {
		    struct list_head *next;

		    if (!comm_counter)
			next = cli_history_head.next;
		    else
			next = comm_counter->list.next;

		    comm_counter =
			list_entry(next, typeof(*comm_counter), list);

		    if (&comm_counter->list == &cli_history_head) {
			strcpy(cmdline, temp_cmdline);
		    } else {
			strcpy(cmdline, comm_counter->command);
		    }
		    cursor = len = strlen(cmdline);
		    redraw = 1;
		}
	    }
	    break;
	case KEY_CTRL('N'):
	case KEY_DOWN:
	    {
		if (!list_empty(&cli_history_head)) {
		    struct list_head *prev;

		    if (!comm_counter)
			prev = cli_history_head.prev;
		    else
			prev = comm_counter->list.prev;

		    comm_counter =
			list_entry(prev, typeof(*comm_counter), list);

		    if (&comm_counter->list == &cli_history_head) {
			strcpy(cmdline, temp_cmdline);
		    } else {
			strcpy(cmdline, comm_counter->command);
		    }
		    cursor = len = strlen(cmdline);
		    redraw = 1;
		}
	    }
	    break;
	case KEY_CTRL('R'):
	    {
	         /* 
	          * Handle this case in another function, since it's 
	          * a kind of special.
	          */
	        const char *p = cmd_reverse_search(&cursor, &kbd_to, &tto);
	        if (p) {
	            strcpy(cmdline, p);
		    len = strlen(cmdline);
	        } else {
	            cmdline[0] = '\0';
		    len = 0;
	        }
	        redraw = 1;
	    }
	    break;
	case KEY_TAB:
	    {
		const char *p;
		size_t len;

		/* Label completion enabled? */
		if (nocomplete)
	            break;

		p = cmdline;
		len = 0;
		while(*p && !my_isspace(*p)) {
		    p++;
		    len++;
		}

		print_labels(cmdline, len);
		redraw = 1;
		break;
	    }
	case KEY_CTRL('V'):
	    if (BIOSName)
		eprintf("%s%s%s", syslinux_banner,
			MK_PTR(0, BIOSName), copyright_str);
	    else
		eprintf("%s%s", syslinux_banner, copyright_str);

	    redraw = 1;
	    break;

	default:
	    if (key >= ' ' && key <= 0xFF && len < MAX_CMDLINE_LEN - 1) {
		if (cursor == len) {
		    temp_cmdline[len] = key;
		    cmdline[len++] = key;
		    temp_cmdline[len] = cmdline[len] = '\0';
		    putchar(key);
		    cursor++;
		    x++;
		    if (x >= width) {
			eprintf("\r\n\033[K");
			y++;
			x = 0;
		    }
		    prev_len++;
		} else {
		    memmove(cmdline + cursor + 1, cmdline + cursor,
			    len - cursor + 1);
		    memmove(temp_cmdline + cursor + 1, temp_cmdline + cursor,
			    len - cursor + 1);
		    temp_cmdline[cursor] = key;
		    cmdline[cursor++] = key;
		    len++;
		    redraw = 1;
		}
	    }
	    break;
	}
    }

    eprintf("\033[?7h");

    /* Add the command to the history */
    comm_counter = malloc(sizeof(struct cli_command));
    comm_counter->command = malloc(sizeof(char) * (strlen(ret) + 1));
    strcpy(comm_counter->command, ret);
    list_add(&(comm_counter->list), &cli_history_head);

    return len ? ret : NULL;
}

static int __constructor cli_init(void)
{
	INIT_LIST_HEAD(&cli_history_head);

	return 0;
}

static void __destructor cli_exit(void)
{
	/* Nothing to do */
}