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readline(): Add ability to modify a string buffer
[people/ms/u-boot.git] / common / main.c
1 /*
2 * (C) Copyright 2000
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * Add to readline cmdline-editing by
6 * (C) Copyright 2005
7 * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
8 *
9 * See file CREDITS for list of people who contributed to this
10 * project.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * MA 02111-1307 USA
26 */
27
28 /* #define DEBUG */
29
30 #include <common.h>
31 #include <watchdog.h>
32 #include <command.h>
33 #ifdef CONFIG_MODEM_SUPPORT
34 #include <malloc.h> /* for free() prototype */
35 #endif
36
37 #ifdef CONFIG_SYS_HUSH_PARSER
38 #include <hush.h>
39 #endif
40
41 #include <post.h>
42
43 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
44 DECLARE_GLOBAL_DATA_PTR;
45 #endif
46
47 /*
48 * Board-specific Platform code can reimplement show_boot_progress () if needed
49 */
50 void inline __show_boot_progress (int val) {}
51 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
52
53 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY)
54 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); /* for do_reset() prototype */
55 #endif
56
57 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
58
59 #if defined(CONFIG_UPDATE_TFTP)
60 void update_tftp (void);
61 #endif /* CONFIG_UPDATE_TFTP */
62
63 #define MAX_DELAY_STOP_STR 32
64
65 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
66 static int abortboot(int);
67 #endif
68
69 #undef DEBUG_PARSER
70
71 char console_buffer[CONFIG_SYS_CBSIZE]; /* console I/O buffer */
72
73 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
74 static char erase_seq[] = "\b \b"; /* erase sequence */
75 static char tab_seq[] = " "; /* used to expand TABs */
76
77 #ifdef CONFIG_BOOT_RETRY_TIME
78 static uint64_t endtime = 0; /* must be set, default is instant timeout */
79 static int retry_time = -1; /* -1 so can call readline before main_loop */
80 #endif
81
82 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
83
84 #ifndef CONFIG_BOOT_RETRY_MIN
85 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
86 #endif
87
88 #ifdef CONFIG_MODEM_SUPPORT
89 int do_mdm_init = 0;
90 extern void mdm_init(void); /* defined in board.c */
91 #endif
92
93 /***************************************************************************
94 * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
95 * returns: 0 - no key string, allow autoboot
96 * 1 - got key string, abort
97 */
98 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
99 # if defined(CONFIG_AUTOBOOT_KEYED)
100 static __inline__ int abortboot(int bootdelay)
101 {
102 int abort = 0;
103 uint64_t etime = endtick(bootdelay);
104 struct {
105 char* str;
106 u_int len;
107 int retry;
108 }
109 delaykey [] = {
110 { str: getenv ("bootdelaykey"), retry: 1 },
111 { str: getenv ("bootdelaykey2"), retry: 1 },
112 { str: getenv ("bootstopkey"), retry: 0 },
113 { str: getenv ("bootstopkey2"), retry: 0 },
114 };
115
116 char presskey [MAX_DELAY_STOP_STR];
117 u_int presskey_len = 0;
118 u_int presskey_max = 0;
119 u_int i;
120
121 # ifdef CONFIG_AUTOBOOT_PROMPT
122 printf(CONFIG_AUTOBOOT_PROMPT);
123 # endif
124
125 # ifdef CONFIG_AUTOBOOT_DELAY_STR
126 if (delaykey[0].str == NULL)
127 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
128 # endif
129 # ifdef CONFIG_AUTOBOOT_DELAY_STR2
130 if (delaykey[1].str == NULL)
131 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
132 # endif
133 # ifdef CONFIG_AUTOBOOT_STOP_STR
134 if (delaykey[2].str == NULL)
135 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
136 # endif
137 # ifdef CONFIG_AUTOBOOT_STOP_STR2
138 if (delaykey[3].str == NULL)
139 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
140 # endif
141
142 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
143 delaykey[i].len = delaykey[i].str == NULL ?
144 0 : strlen (delaykey[i].str);
145 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
146 MAX_DELAY_STOP_STR : delaykey[i].len;
147
148 presskey_max = presskey_max > delaykey[i].len ?
149 presskey_max : delaykey[i].len;
150
151 # if DEBUG_BOOTKEYS
152 printf("%s key:<%s>\n",
153 delaykey[i].retry ? "delay" : "stop",
154 delaykey[i].str ? delaykey[i].str : "NULL");
155 # endif
156 }
157
158 /* In order to keep up with incoming data, check timeout only
159 * when catch up.
160 */
161 do {
162 if (tstc()) {
163 if (presskey_len < presskey_max) {
164 presskey [presskey_len ++] = getc();
165 }
166 else {
167 for (i = 0; i < presskey_max - 1; i ++)
168 presskey [i] = presskey [i + 1];
169
170 presskey [i] = getc();
171 }
172 }
173
174 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
175 if (delaykey[i].len > 0 &&
176 presskey_len >= delaykey[i].len &&
177 memcmp (presskey + presskey_len - delaykey[i].len,
178 delaykey[i].str,
179 delaykey[i].len) == 0) {
180 # if DEBUG_BOOTKEYS
181 printf("got %skey\n",
182 delaykey[i].retry ? "delay" : "stop");
183 # endif
184
185 # ifdef CONFIG_BOOT_RETRY_TIME
186 /* don't retry auto boot */
187 if (! delaykey[i].retry)
188 retry_time = -1;
189 # endif
190 abort = 1;
191 }
192 }
193 } while (!abort && get_ticks() <= etime);
194
195 # if DEBUG_BOOTKEYS
196 if (!abort)
197 puts("key timeout\n");
198 # endif
199
200 #ifdef CONFIG_SILENT_CONSOLE
201 if (abort)
202 gd->flags &= ~GD_FLG_SILENT;
203 #endif
204
205 return abort;
206 }
207
208 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */
209
210 #ifdef CONFIG_MENUKEY
211 static int menukey = 0;
212 #endif
213
214 static __inline__ int abortboot(int bootdelay)
215 {
216 int abort = 0;
217
218 #ifdef CONFIG_MENUPROMPT
219 printf(CONFIG_MENUPROMPT);
220 #else
221 printf("Hit any key to stop autoboot: %2d ", bootdelay);
222 #endif
223
224 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
225 /*
226 * Check if key already pressed
227 * Don't check if bootdelay < 0
228 */
229 if (bootdelay >= 0) {
230 if (tstc()) { /* we got a key press */
231 (void) getc(); /* consume input */
232 puts ("\b\b\b 0");
233 abort = 1; /* don't auto boot */
234 }
235 }
236 #endif
237
238 while ((bootdelay > 0) && (!abort)) {
239 int i;
240
241 --bootdelay;
242 /* delay 100 * 10ms */
243 for (i=0; !abort && i<100; ++i) {
244 if (tstc()) { /* we got a key press */
245 abort = 1; /* don't auto boot */
246 bootdelay = 0; /* no more delay */
247 # ifdef CONFIG_MENUKEY
248 menukey = getc();
249 # else
250 (void) getc(); /* consume input */
251 # endif
252 break;
253 }
254 udelay(10000);
255 }
256
257 printf("\b\b\b%2d ", bootdelay);
258 }
259
260 putc('\n');
261
262 #ifdef CONFIG_SILENT_CONSOLE
263 if (abort)
264 gd->flags &= ~GD_FLG_SILENT;
265 #endif
266
267 return abort;
268 }
269 # endif /* CONFIG_AUTOBOOT_KEYED */
270 #endif /* CONFIG_BOOTDELAY >= 0 */
271
272 /****************************************************************************/
273
274 void main_loop (void)
275 {
276 #ifndef CONFIG_SYS_HUSH_PARSER
277 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
278 int len;
279 int rc = 1;
280 int flag;
281 #endif
282
283 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
284 char *s;
285 int bootdelay;
286 #endif
287 #ifdef CONFIG_PREBOOT
288 char *p;
289 #endif
290 #ifdef CONFIG_BOOTCOUNT_LIMIT
291 unsigned long bootcount = 0;
292 unsigned long bootlimit = 0;
293 char *bcs;
294 char bcs_set[16];
295 #endif /* CONFIG_BOOTCOUNT_LIMIT */
296
297 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
298 ulong bmp = 0; /* default bitmap */
299 extern int trab_vfd (ulong bitmap);
300
301 #ifdef CONFIG_MODEM_SUPPORT
302 if (do_mdm_init)
303 bmp = 1; /* alternate bitmap */
304 #endif
305 trab_vfd (bmp);
306 #endif /* CONFIG_VFD && VFD_TEST_LOGO */
307
308 #if defined(CONFIG_UPDATE_TFTP)
309 update_tftp ();
310 #endif /* CONFIG_UPDATE_TFTP */
311
312 #ifdef CONFIG_BOOTCOUNT_LIMIT
313 bootcount = bootcount_load();
314 bootcount++;
315 bootcount_store (bootcount);
316 sprintf (bcs_set, "%lu", bootcount);
317 setenv ("bootcount", bcs_set);
318 bcs = getenv ("bootlimit");
319 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
320 #endif /* CONFIG_BOOTCOUNT_LIMIT */
321
322 #ifdef CONFIG_MODEM_SUPPORT
323 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init);
324 if (do_mdm_init) {
325 char *str = strdup(getenv("mdm_cmd"));
326 setenv ("preboot", str); /* set or delete definition */
327 if (str != NULL)
328 free (str);
329 mdm_init(); /* wait for modem connection */
330 }
331 #endif /* CONFIG_MODEM_SUPPORT */
332
333 #ifdef CONFIG_VERSION_VARIABLE
334 {
335 extern char version_string[];
336
337 setenv ("ver", version_string); /* set version variable */
338 }
339 #endif /* CONFIG_VERSION_VARIABLE */
340
341 #ifdef CONFIG_SYS_HUSH_PARSER
342 u_boot_hush_start ();
343 #endif
344
345 #if defined(CONFIG_HUSH_INIT_VAR)
346 hush_init_var ();
347 #endif
348
349 #ifdef CONFIG_AUTO_COMPLETE
350 install_auto_complete();
351 #endif
352
353 #ifdef CONFIG_PREBOOT
354 if ((p = getenv ("preboot")) != NULL) {
355 # ifdef CONFIG_AUTOBOOT_KEYED
356 int prev = disable_ctrlc(1); /* disable Control C checking */
357 # endif
358
359 # ifndef CONFIG_SYS_HUSH_PARSER
360 run_command (p, 0);
361 # else
362 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
363 FLAG_EXIT_FROM_LOOP);
364 # endif
365
366 # ifdef CONFIG_AUTOBOOT_KEYED
367 disable_ctrlc(prev); /* restore Control C checking */
368 # endif
369 }
370 #endif /* CONFIG_PREBOOT */
371
372 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
373 s = getenv ("bootdelay");
374 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
375
376 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
377
378 # ifdef CONFIG_BOOT_RETRY_TIME
379 init_cmd_timeout ();
380 # endif /* CONFIG_BOOT_RETRY_TIME */
381
382 #ifdef CONFIG_POST
383 if (gd->flags & GD_FLG_POSTFAIL) {
384 s = getenv("failbootcmd");
385 }
386 else
387 #endif /* CONFIG_POST */
388 #ifdef CONFIG_BOOTCOUNT_LIMIT
389 if (bootlimit && (bootcount > bootlimit)) {
390 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
391 (unsigned)bootlimit);
392 s = getenv ("altbootcmd");
393 }
394 else
395 #endif /* CONFIG_BOOTCOUNT_LIMIT */
396 s = getenv ("bootcmd");
397
398 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
399
400 if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
401 # ifdef CONFIG_AUTOBOOT_KEYED
402 int prev = disable_ctrlc(1); /* disable Control C checking */
403 # endif
404
405 # ifndef CONFIG_SYS_HUSH_PARSER
406 run_command (s, 0);
407 # else
408 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
409 FLAG_EXIT_FROM_LOOP);
410 # endif
411
412 # ifdef CONFIG_AUTOBOOT_KEYED
413 disable_ctrlc(prev); /* restore Control C checking */
414 # endif
415 }
416
417 # ifdef CONFIG_MENUKEY
418 if (menukey == CONFIG_MENUKEY) {
419 s = getenv("menucmd");
420 if (s) {
421 # ifndef CONFIG_SYS_HUSH_PARSER
422 run_command (s, 0);
423 # else
424 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
425 FLAG_EXIT_FROM_LOOP);
426 # endif
427 }
428 }
429 #endif /* CONFIG_MENUKEY */
430 #endif /* CONFIG_BOOTDELAY */
431
432 #ifdef CONFIG_AMIGAONEG3SE
433 {
434 extern void video_banner(void);
435 video_banner();
436 }
437 #endif
438
439 /*
440 * Main Loop for Monitor Command Processing
441 */
442 #ifdef CONFIG_SYS_HUSH_PARSER
443 parse_file_outer();
444 /* This point is never reached */
445 for (;;);
446 #else
447 for (;;) {
448 #ifdef CONFIG_BOOT_RETRY_TIME
449 if (rc >= 0) {
450 /* Saw enough of a valid command to
451 * restart the timeout.
452 */
453 reset_cmd_timeout();
454 }
455 #endif
456 len = readline (CONFIG_SYS_PROMPT);
457
458 flag = 0; /* assume no special flags for now */
459 if (len > 0)
460 strcpy (lastcommand, console_buffer);
461 else if (len == 0)
462 flag |= CMD_FLAG_REPEAT;
463 #ifdef CONFIG_BOOT_RETRY_TIME
464 else if (len == -2) {
465 /* -2 means timed out, retry autoboot
466 */
467 puts ("\nTimed out waiting for command\n");
468 # ifdef CONFIG_RESET_TO_RETRY
469 /* Reinit board to run initialization code again */
470 do_reset (NULL, 0, 0, NULL);
471 # else
472 return; /* retry autoboot */
473 # endif
474 }
475 #endif
476
477 if (len == -1)
478 puts ("<INTERRUPT>\n");
479 else
480 rc = run_command (lastcommand, flag);
481
482 if (rc <= 0) {
483 /* invalid command or not repeatable, forget it */
484 lastcommand[0] = 0;
485 }
486 }
487 #endif /*CONFIG_SYS_HUSH_PARSER*/
488 }
489
490 #ifdef CONFIG_BOOT_RETRY_TIME
491 /***************************************************************************
492 * initialize command line timeout
493 */
494 void init_cmd_timeout(void)
495 {
496 char *s = getenv ("bootretry");
497
498 if (s != NULL)
499 retry_time = (int)simple_strtol(s, NULL, 10);
500 else
501 retry_time = CONFIG_BOOT_RETRY_TIME;
502
503 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
504 retry_time = CONFIG_BOOT_RETRY_MIN;
505 }
506
507 /***************************************************************************
508 * reset command line timeout to retry_time seconds
509 */
510 void reset_cmd_timeout(void)
511 {
512 endtime = endtick(retry_time);
513 }
514 #endif
515
516 #ifdef CONFIG_CMDLINE_EDITING
517
518 /*
519 * cmdline-editing related codes from vivi.
520 * Author: Janghoon Lyu <nandy@mizi.com>
521 */
522
523 #define putnstr(str,n) do { \
524 printf ("%.*s", (int)n, str); \
525 } while (0)
526
527 #define CTL_CH(c) ((c) - 'a' + 1)
528
529 #define MAX_CMDBUF_SIZE 256
530
531 #define CTL_BACKSPACE ('\b')
532 #define DEL ((char)255)
533 #define DEL7 ((char)127)
534 #define CREAD_HIST_CHAR ('!')
535
536 #define getcmd_putch(ch) putc(ch)
537 #define getcmd_getch() getc()
538 #define getcmd_cbeep() getcmd_putch('\a')
539
540 #define HIST_MAX 20
541 #define HIST_SIZE MAX_CMDBUF_SIZE
542
543 static int hist_max = 0;
544 static int hist_add_idx = 0;
545 static int hist_cur = -1;
546 unsigned hist_num = 0;
547
548 char* hist_list[HIST_MAX];
549 char hist_lines[HIST_MAX][HIST_SIZE];
550
551 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
552
553 static void hist_init(void)
554 {
555 int i;
556
557 hist_max = 0;
558 hist_add_idx = 0;
559 hist_cur = -1;
560 hist_num = 0;
561
562 for (i = 0; i < HIST_MAX; i++) {
563 hist_list[i] = hist_lines[i];
564 hist_list[i][0] = '\0';
565 }
566 }
567
568 static void cread_add_to_hist(char *line)
569 {
570 strcpy(hist_list[hist_add_idx], line);
571
572 if (++hist_add_idx >= HIST_MAX)
573 hist_add_idx = 0;
574
575 if (hist_add_idx > hist_max)
576 hist_max = hist_add_idx;
577
578 hist_num++;
579 }
580
581 static char* hist_prev(void)
582 {
583 char *ret;
584 int old_cur;
585
586 if (hist_cur < 0)
587 return NULL;
588
589 old_cur = hist_cur;
590 if (--hist_cur < 0)
591 hist_cur = hist_max;
592
593 if (hist_cur == hist_add_idx) {
594 hist_cur = old_cur;
595 ret = NULL;
596 } else
597 ret = hist_list[hist_cur];
598
599 return (ret);
600 }
601
602 static char* hist_next(void)
603 {
604 char *ret;
605
606 if (hist_cur < 0)
607 return NULL;
608
609 if (hist_cur == hist_add_idx)
610 return NULL;
611
612 if (++hist_cur > hist_max)
613 hist_cur = 0;
614
615 if (hist_cur == hist_add_idx) {
616 ret = "";
617 } else
618 ret = hist_list[hist_cur];
619
620 return (ret);
621 }
622
623 #ifndef CONFIG_CMDLINE_EDITING
624 static void cread_print_hist_list(void)
625 {
626 int i;
627 unsigned long n;
628
629 n = hist_num - hist_max;
630
631 i = hist_add_idx + 1;
632 while (1) {
633 if (i > hist_max)
634 i = 0;
635 if (i == hist_add_idx)
636 break;
637 printf("%s\n", hist_list[i]);
638 n++;
639 i++;
640 }
641 }
642 #endif /* CONFIG_CMDLINE_EDITING */
643
644 #define BEGINNING_OF_LINE() { \
645 while (num) { \
646 getcmd_putch(CTL_BACKSPACE); \
647 num--; \
648 } \
649 }
650
651 #define ERASE_TO_EOL() { \
652 if (num < eol_num) { \
653 int tmp; \
654 for (tmp = num; tmp < eol_num; tmp++) \
655 getcmd_putch(' '); \
656 while (tmp-- > num) \
657 getcmd_putch(CTL_BACKSPACE); \
658 eol_num = num; \
659 } \
660 }
661
662 #define REFRESH_TO_EOL() { \
663 if (num < eol_num) { \
664 wlen = eol_num - num; \
665 putnstr(buf + num, wlen); \
666 num = eol_num; \
667 } \
668 }
669
670 static void cread_add_char(char ichar, int insert, unsigned long *num,
671 unsigned long *eol_num, char *buf, unsigned long len)
672 {
673 unsigned long wlen;
674
675 /* room ??? */
676 if (insert || *num == *eol_num) {
677 if (*eol_num > len - 1) {
678 getcmd_cbeep();
679 return;
680 }
681 (*eol_num)++;
682 }
683
684 if (insert) {
685 wlen = *eol_num - *num;
686 if (wlen > 1) {
687 memmove(&buf[*num+1], &buf[*num], wlen-1);
688 }
689
690 buf[*num] = ichar;
691 putnstr(buf + *num, wlen);
692 (*num)++;
693 while (--wlen) {
694 getcmd_putch(CTL_BACKSPACE);
695 }
696 } else {
697 /* echo the character */
698 wlen = 1;
699 buf[*num] = ichar;
700 putnstr(buf + *num, wlen);
701 (*num)++;
702 }
703 }
704
705 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
706 unsigned long *eol_num, char *buf, unsigned long len)
707 {
708 while (strsize--) {
709 cread_add_char(*str, insert, num, eol_num, buf, len);
710 str++;
711 }
712 }
713
714 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
715 {
716 unsigned long num = 0;
717 unsigned long eol_num = 0;
718 unsigned long wlen;
719 char ichar;
720 int insert = 1;
721 int esc_len = 0;
722 char esc_save[8];
723 int init_len = strlen(buf);
724
725 if (init_len)
726 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
727
728 while (1) {
729 #ifdef CONFIG_BOOT_RETRY_TIME
730 while (!tstc()) { /* while no incoming data */
731 if (retry_time >= 0 && get_ticks() > endtime)
732 return (-2); /* timed out */
733 }
734 #endif
735
736 ichar = getcmd_getch();
737
738 if ((ichar == '\n') || (ichar == '\r')) {
739 putc('\n');
740 break;
741 }
742
743 /*
744 * handle standard linux xterm esc sequences for arrow key, etc.
745 */
746 if (esc_len != 0) {
747 if (esc_len == 1) {
748 if (ichar == '[') {
749 esc_save[esc_len] = ichar;
750 esc_len = 2;
751 } else {
752 cread_add_str(esc_save, esc_len, insert,
753 &num, &eol_num, buf, *len);
754 esc_len = 0;
755 }
756 continue;
757 }
758
759 switch (ichar) {
760
761 case 'D': /* <- key */
762 ichar = CTL_CH('b');
763 esc_len = 0;
764 break;
765 case 'C': /* -> key */
766 ichar = CTL_CH('f');
767 esc_len = 0;
768 break; /* pass off to ^F handler */
769 case 'H': /* Home key */
770 ichar = CTL_CH('a');
771 esc_len = 0;
772 break; /* pass off to ^A handler */
773 case 'A': /* up arrow */
774 ichar = CTL_CH('p');
775 esc_len = 0;
776 break; /* pass off to ^P handler */
777 case 'B': /* down arrow */
778 ichar = CTL_CH('n');
779 esc_len = 0;
780 break; /* pass off to ^N handler */
781 default:
782 esc_save[esc_len++] = ichar;
783 cread_add_str(esc_save, esc_len, insert,
784 &num, &eol_num, buf, *len);
785 esc_len = 0;
786 continue;
787 }
788 }
789
790 switch (ichar) {
791 case 0x1b:
792 if (esc_len == 0) {
793 esc_save[esc_len] = ichar;
794 esc_len = 1;
795 } else {
796 puts("impossible condition #876\n");
797 esc_len = 0;
798 }
799 break;
800
801 case CTL_CH('a'):
802 BEGINNING_OF_LINE();
803 break;
804 case CTL_CH('c'): /* ^C - break */
805 *buf = '\0'; /* discard input */
806 return (-1);
807 case CTL_CH('f'):
808 if (num < eol_num) {
809 getcmd_putch(buf[num]);
810 num++;
811 }
812 break;
813 case CTL_CH('b'):
814 if (num) {
815 getcmd_putch(CTL_BACKSPACE);
816 num--;
817 }
818 break;
819 case CTL_CH('d'):
820 if (num < eol_num) {
821 wlen = eol_num - num - 1;
822 if (wlen) {
823 memmove(&buf[num], &buf[num+1], wlen);
824 putnstr(buf + num, wlen);
825 }
826
827 getcmd_putch(' ');
828 do {
829 getcmd_putch(CTL_BACKSPACE);
830 } while (wlen--);
831 eol_num--;
832 }
833 break;
834 case CTL_CH('k'):
835 ERASE_TO_EOL();
836 break;
837 case CTL_CH('e'):
838 REFRESH_TO_EOL();
839 break;
840 case CTL_CH('o'):
841 insert = !insert;
842 break;
843 case CTL_CH('x'):
844 case CTL_CH('u'):
845 BEGINNING_OF_LINE();
846 ERASE_TO_EOL();
847 break;
848 case DEL:
849 case DEL7:
850 case 8:
851 if (num) {
852 wlen = eol_num - num;
853 num--;
854 memmove(&buf[num], &buf[num+1], wlen);
855 getcmd_putch(CTL_BACKSPACE);
856 putnstr(buf + num, wlen);
857 getcmd_putch(' ');
858 do {
859 getcmd_putch(CTL_BACKSPACE);
860 } while (wlen--);
861 eol_num--;
862 }
863 break;
864 case CTL_CH('p'):
865 case CTL_CH('n'):
866 {
867 char * hline;
868
869 esc_len = 0;
870
871 if (ichar == CTL_CH('p'))
872 hline = hist_prev();
873 else
874 hline = hist_next();
875
876 if (!hline) {
877 getcmd_cbeep();
878 continue;
879 }
880
881 /* nuke the current line */
882 /* first, go home */
883 BEGINNING_OF_LINE();
884
885 /* erase to end of line */
886 ERASE_TO_EOL();
887
888 /* copy new line into place and display */
889 strcpy(buf, hline);
890 eol_num = strlen(buf);
891 REFRESH_TO_EOL();
892 continue;
893 }
894 #ifdef CONFIG_AUTO_COMPLETE
895 case '\t': {
896 int num2, col;
897
898 /* do not autocomplete when in the middle */
899 if (num < eol_num) {
900 getcmd_cbeep();
901 break;
902 }
903
904 buf[num] = '\0';
905 col = strlen(prompt) + eol_num;
906 num2 = num;
907 if (cmd_auto_complete(prompt, buf, &num2, &col)) {
908 col = num2 - num;
909 num += col;
910 eol_num += col;
911 }
912 break;
913 }
914 #endif
915 default:
916 cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
917 break;
918 }
919 }
920 *len = eol_num;
921 buf[eol_num] = '\0'; /* lose the newline */
922
923 if (buf[0] && buf[0] != CREAD_HIST_CHAR)
924 cread_add_to_hist(buf);
925 hist_cur = hist_add_idx;
926
927 return 0;
928 }
929
930 #endif /* CONFIG_CMDLINE_EDITING */
931
932 /****************************************************************************/
933
934 /*
935 * Prompt for input and read a line.
936 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
937 * time out when time goes past endtime (timebase time in ticks).
938 * Return: number of read characters
939 * -1 if break
940 * -2 if timed out
941 */
942 int readline (const char *const prompt)
943 {
944 /*
945 * If console_buffer isn't 0-length the user will be prompted to modify
946 * it instead of entering it from scratch as desired.
947 */
948 console_buffer[0] = '\0';
949
950 return readline_into_buffer(prompt, console_buffer);
951 }
952
953
954 int readline_into_buffer (const char *const prompt, char * buffer)
955 {
956 char *p = buffer;
957 #ifdef CONFIG_CMDLINE_EDITING
958 unsigned int len=MAX_CMDBUF_SIZE;
959 int rc;
960 static int initted = 0;
961
962 /*
963 * History uses a global array which is not
964 * writable until after relocation to RAM.
965 * Revert to non-history version if still
966 * running from flash.
967 */
968 if (gd->flags & GD_FLG_RELOC) {
969 if (!initted) {
970 hist_init();
971 initted = 1;
972 }
973
974 if (prompt)
975 puts (prompt);
976
977 rc = cread_line(prompt, p, &len);
978 return rc < 0 ? rc : len;
979
980 } else {
981 #endif /* CONFIG_CMDLINE_EDITING */
982 char * p_buf = p;
983 int n = 0; /* buffer index */
984 int plen = 0; /* prompt length */
985 int col; /* output column cnt */
986 char c;
987
988 /* print prompt */
989 if (prompt) {
990 plen = strlen (prompt);
991 puts (prompt);
992 }
993 col = plen;
994
995 for (;;) {
996 #ifdef CONFIG_BOOT_RETRY_TIME
997 while (!tstc()) { /* while no incoming data */
998 if (retry_time >= 0 && get_ticks() > endtime)
999 return (-2); /* timed out */
1000 }
1001 #endif
1002 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
1003
1004 #ifdef CONFIG_SHOW_ACTIVITY
1005 while (!tstc()) {
1006 extern void show_activity(int arg);
1007 show_activity(0);
1008 }
1009 #endif
1010 c = getc();
1011
1012 /*
1013 * Special character handling
1014 */
1015 switch (c) {
1016 case '\r': /* Enter */
1017 case '\n':
1018 *p = '\0';
1019 puts ("\r\n");
1020 return (p - p_buf);
1021
1022 case '\0': /* nul */
1023 continue;
1024
1025 case 0x03: /* ^C - break */
1026 p_buf[0] = '\0'; /* discard input */
1027 return (-1);
1028
1029 case 0x15: /* ^U - erase line */
1030 while (col > plen) {
1031 puts (erase_seq);
1032 --col;
1033 }
1034 p = p_buf;
1035 n = 0;
1036 continue;
1037
1038 case 0x17: /* ^W - erase word */
1039 p=delete_char(p_buf, p, &col, &n, plen);
1040 while ((n > 0) && (*p != ' ')) {
1041 p=delete_char(p_buf, p, &col, &n, plen);
1042 }
1043 continue;
1044
1045 case 0x08: /* ^H - backspace */
1046 case 0x7F: /* DEL - backspace */
1047 p=delete_char(p_buf, p, &col, &n, plen);
1048 continue;
1049
1050 default:
1051 /*
1052 * Must be a normal character then
1053 */
1054 if (n < CONFIG_SYS_CBSIZE-2) {
1055 if (c == '\t') { /* expand TABs */
1056 #ifdef CONFIG_AUTO_COMPLETE
1057 /* if auto completion triggered just continue */
1058 *p = '\0';
1059 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1060 p = p_buf + n; /* reset */
1061 continue;
1062 }
1063 #endif
1064 puts (tab_seq+(col&07));
1065 col += 8 - (col&07);
1066 } else {
1067 ++col; /* echo input */
1068 putc (c);
1069 }
1070 *p++ = c;
1071 ++n;
1072 } else { /* Buffer full */
1073 putc ('\a');
1074 }
1075 }
1076 }
1077 #ifdef CONFIG_CMDLINE_EDITING
1078 }
1079 #endif
1080 }
1081
1082 /****************************************************************************/
1083
1084 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1085 {
1086 char *s;
1087
1088 if (*np == 0) {
1089 return (p);
1090 }
1091
1092 if (*(--p) == '\t') { /* will retype the whole line */
1093 while (*colp > plen) {
1094 puts (erase_seq);
1095 (*colp)--;
1096 }
1097 for (s=buffer; s<p; ++s) {
1098 if (*s == '\t') {
1099 puts (tab_seq+((*colp) & 07));
1100 *colp += 8 - ((*colp) & 07);
1101 } else {
1102 ++(*colp);
1103 putc (*s);
1104 }
1105 }
1106 } else {
1107 puts (erase_seq);
1108 (*colp)--;
1109 }
1110 (*np)--;
1111 return (p);
1112 }
1113
1114 /****************************************************************************/
1115
1116 int parse_line (char *line, char *argv[])
1117 {
1118 int nargs = 0;
1119
1120 #ifdef DEBUG_PARSER
1121 printf ("parse_line: \"%s\"\n", line);
1122 #endif
1123 while (nargs < CONFIG_SYS_MAXARGS) {
1124
1125 /* skip any white space */
1126 while ((*line == ' ') || (*line == '\t')) {
1127 ++line;
1128 }
1129
1130 if (*line == '\0') { /* end of line, no more args */
1131 argv[nargs] = NULL;
1132 #ifdef DEBUG_PARSER
1133 printf ("parse_line: nargs=%d\n", nargs);
1134 #endif
1135 return (nargs);
1136 }
1137
1138 argv[nargs++] = line; /* begin of argument string */
1139
1140 /* find end of string */
1141 while (*line && (*line != ' ') && (*line != '\t')) {
1142 ++line;
1143 }
1144
1145 if (*line == '\0') { /* end of line, no more args */
1146 argv[nargs] = NULL;
1147 #ifdef DEBUG_PARSER
1148 printf ("parse_line: nargs=%d\n", nargs);
1149 #endif
1150 return (nargs);
1151 }
1152
1153 *line++ = '\0'; /* terminate current arg */
1154 }
1155
1156 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1157
1158 #ifdef DEBUG_PARSER
1159 printf ("parse_line: nargs=%d\n", nargs);
1160 #endif
1161 return (nargs);
1162 }
1163
1164 /****************************************************************************/
1165
1166 static void process_macros (const char *input, char *output)
1167 {
1168 char c, prev;
1169 const char *varname_start = NULL;
1170 int inputcnt = strlen (input);
1171 int outputcnt = CONFIG_SYS_CBSIZE;
1172 int state = 0; /* 0 = waiting for '$' */
1173
1174 /* 1 = waiting for '(' or '{' */
1175 /* 2 = waiting for ')' or '}' */
1176 /* 3 = waiting for ''' */
1177 #ifdef DEBUG_PARSER
1178 char *output_start = output;
1179
1180 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1181 input);
1182 #endif
1183
1184 prev = '\0'; /* previous character */
1185
1186 while (inputcnt && outputcnt) {
1187 c = *input++;
1188 inputcnt--;
1189
1190 if (state != 3) {
1191 /* remove one level of escape characters */
1192 if ((c == '\\') && (prev != '\\')) {
1193 if (inputcnt-- == 0)
1194 break;
1195 prev = c;
1196 c = *input++;
1197 }
1198 }
1199
1200 switch (state) {
1201 case 0: /* Waiting for (unescaped) $ */
1202 if ((c == '\'') && (prev != '\\')) {
1203 state = 3;
1204 break;
1205 }
1206 if ((c == '$') && (prev != '\\')) {
1207 state++;
1208 } else {
1209 *(output++) = c;
1210 outputcnt--;
1211 }
1212 break;
1213 case 1: /* Waiting for ( */
1214 if (c == '(' || c == '{') {
1215 state++;
1216 varname_start = input;
1217 } else {
1218 state = 0;
1219 *(output++) = '$';
1220 outputcnt--;
1221
1222 if (outputcnt) {
1223 *(output++) = c;
1224 outputcnt--;
1225 }
1226 }
1227 break;
1228 case 2: /* Waiting for ) */
1229 if (c == ')' || c == '}') {
1230 int i;
1231 char envname[CONFIG_SYS_CBSIZE], *envval;
1232 int envcnt = input - varname_start - 1; /* Varname # of chars */
1233
1234 /* Get the varname */
1235 for (i = 0; i < envcnt; i++) {
1236 envname[i] = varname_start[i];
1237 }
1238 envname[i] = 0;
1239
1240 /* Get its value */
1241 envval = getenv (envname);
1242
1243 /* Copy into the line if it exists */
1244 if (envval != NULL)
1245 while ((*envval) && outputcnt) {
1246 *(output++) = *(envval++);
1247 outputcnt--;
1248 }
1249 /* Look for another '$' */
1250 state = 0;
1251 }
1252 break;
1253 case 3: /* Waiting for ' */
1254 if ((c == '\'') && (prev != '\\')) {
1255 state = 0;
1256 } else {
1257 *(output++) = c;
1258 outputcnt--;
1259 }
1260 break;
1261 }
1262 prev = c;
1263 }
1264
1265 if (outputcnt)
1266 *output = 0;
1267 else
1268 *(output - 1) = 0;
1269
1270 #ifdef DEBUG_PARSER
1271 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1272 strlen (output_start), output_start);
1273 #endif
1274 }
1275
1276 /****************************************************************************
1277 * returns:
1278 * 1 - command executed, repeatable
1279 * 0 - command executed but not repeatable, interrupted commands are
1280 * always considered not repeatable
1281 * -1 - not executed (unrecognized, bootd recursion or too many args)
1282 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1283 * considered unrecognized)
1284 *
1285 * WARNING:
1286 *
1287 * We must create a temporary copy of the command since the command we get
1288 * may be the result from getenv(), which returns a pointer directly to
1289 * the environment data, which may change magicly when the command we run
1290 * creates or modifies environment variables (like "bootp" does).
1291 */
1292
1293 int run_command (const char *cmd, int flag)
1294 {
1295 cmd_tbl_t *cmdtp;
1296 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */
1297 char *token; /* start of token in cmdbuf */
1298 char *sep; /* end of token (separator) in cmdbuf */
1299 char finaltoken[CONFIG_SYS_CBSIZE];
1300 char *str = cmdbuf;
1301 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
1302 int argc, inquotes;
1303 int repeatable = 1;
1304 int rc = 0;
1305
1306 #ifdef DEBUG_PARSER
1307 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1308 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */
1309 puts ("\"\n");
1310 #endif
1311
1312 clear_ctrlc(); /* forget any previous Control C */
1313
1314 if (!cmd || !*cmd) {
1315 return -1; /* empty command */
1316 }
1317
1318 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1319 puts ("## Command too long!\n");
1320 return -1;
1321 }
1322
1323 strcpy (cmdbuf, cmd);
1324
1325 /* Process separators and check for invalid
1326 * repeatable commands
1327 */
1328
1329 #ifdef DEBUG_PARSER
1330 printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1331 #endif
1332 while (*str) {
1333
1334 /*
1335 * Find separator, or string end
1336 * Allow simple escape of ';' by writing "\;"
1337 */
1338 for (inquotes = 0, sep = str; *sep; sep++) {
1339 if ((*sep=='\'') &&
1340 (*(sep-1) != '\\'))
1341 inquotes=!inquotes;
1342
1343 if (!inquotes &&
1344 (*sep == ';') && /* separator */
1345 ( sep != str) && /* past string start */
1346 (*(sep-1) != '\\')) /* and NOT escaped */
1347 break;
1348 }
1349
1350 /*
1351 * Limit the token to data between separators
1352 */
1353 token = str;
1354 if (*sep) {
1355 str = sep + 1; /* start of command for next pass */
1356 *sep = '\0';
1357 }
1358 else
1359 str = sep; /* no more commands for next pass */
1360 #ifdef DEBUG_PARSER
1361 printf ("token: \"%s\"\n", token);
1362 #endif
1363
1364 /* find macros in this token and replace them */
1365 process_macros (token, finaltoken);
1366
1367 /* Extract arguments */
1368 if ((argc = parse_line (finaltoken, argv)) == 0) {
1369 rc = -1; /* no command at all */
1370 continue;
1371 }
1372
1373 /* Look up command in command table */
1374 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1375 printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1376 rc = -1; /* give up after bad command */
1377 continue;
1378 }
1379
1380 /* found - check max args */
1381 if (argc > cmdtp->maxargs) {
1382 cmd_usage(cmdtp);
1383 rc = -1;
1384 continue;
1385 }
1386
1387 #if defined(CONFIG_CMD_BOOTD)
1388 /* avoid "bootd" recursion */
1389 if (cmdtp->cmd == do_bootd) {
1390 #ifdef DEBUG_PARSER
1391 printf ("[%s]\n", finaltoken);
1392 #endif
1393 if (flag & CMD_FLAG_BOOTD) {
1394 puts ("'bootd' recursion detected\n");
1395 rc = -1;
1396 continue;
1397 } else {
1398 flag |= CMD_FLAG_BOOTD;
1399 }
1400 }
1401 #endif
1402
1403 /* OK - call function to do the command */
1404 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1405 rc = -1;
1406 }
1407
1408 repeatable &= cmdtp->repeatable;
1409
1410 /* Did the user stop this? */
1411 if (had_ctrlc ())
1412 return -1; /* if stopped then not repeatable */
1413 }
1414
1415 return rc ? rc : repeatable;
1416 }
1417
1418 /****************************************************************************/
1419
1420 #if defined(CONFIG_CMD_RUN)
1421 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
1422 {
1423 int i;
1424
1425 if (argc < 2) {
1426 cmd_usage(cmdtp);
1427 return 1;
1428 }
1429
1430 for (i=1; i<argc; ++i) {
1431 char *arg;
1432
1433 if ((arg = getenv (argv[i])) == NULL) {
1434 printf ("## Error: \"%s\" not defined\n", argv[i]);
1435 return 1;
1436 }
1437 #ifndef CONFIG_SYS_HUSH_PARSER
1438 if (run_command (arg, flag) == -1)
1439 return 1;
1440 #else
1441 if (parse_string_outer(arg,
1442 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
1443 return 1;
1444 #endif
1445 }
1446 return 0;
1447 }
1448 #endif
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