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Merge branch 'master' of git://git.denx.de/u-boot-avr32
[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 #include <malloc.h>
34 #include <version.h>
35 #ifdef CONFIG_MODEM_SUPPORT
36 #include <malloc.h> /* for free() prototype */
37 #endif
38
39 #ifdef CONFIG_SYS_HUSH_PARSER
40 #include <hush.h>
41 #endif
42
43 #include <post.h>
44 #include <linux/ctype.h>
45 #include <menu.h>
46
47 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
48 DECLARE_GLOBAL_DATA_PTR;
49 #endif
50
51 /*
52 * Board-specific Platform code can reimplement show_boot_progress () if needed
53 */
54 void inline __show_boot_progress (int val) {}
55 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
56
57 #if defined(CONFIG_UPDATE_TFTP)
58 int update_tftp (ulong addr);
59 #endif /* CONFIG_UPDATE_TFTP */
60
61 #define MAX_DELAY_STOP_STR 32
62
63 #undef DEBUG_PARSER
64
65 char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */
66
67 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
68 static const char erase_seq[] = "\b \b"; /* erase sequence */
69 static const char tab_seq[] = " "; /* used to expand TABs */
70
71 #ifdef CONFIG_BOOT_RETRY_TIME
72 static uint64_t endtime = 0; /* must be set, default is instant timeout */
73 static int retry_time = -1; /* -1 so can call readline before main_loop */
74 #endif
75
76 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
77
78 #ifndef CONFIG_BOOT_RETRY_MIN
79 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
80 #endif
81
82 #ifdef CONFIG_MODEM_SUPPORT
83 int do_mdm_init = 0;
84 extern void mdm_init(void); /* defined in board.c */
85 #endif
86
87 /***************************************************************************
88 * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
89 * returns: 0 - no key string, allow autoboot 1 - got key string, abort
90 */
91 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
92 # if defined(CONFIG_AUTOBOOT_KEYED)
93 #ifndef CONFIG_MENU
94 static inline
95 #endif
96 int abortboot(int bootdelay)
97 {
98 int abort = 0;
99 uint64_t etime = endtick(bootdelay);
100 struct {
101 char* str;
102 u_int len;
103 int retry;
104 }
105 delaykey [] = {
106 { str: getenv ("bootdelaykey"), retry: 1 },
107 { str: getenv ("bootdelaykey2"), retry: 1 },
108 { str: getenv ("bootstopkey"), retry: 0 },
109 { str: getenv ("bootstopkey2"), retry: 0 },
110 };
111
112 char presskey [MAX_DELAY_STOP_STR];
113 u_int presskey_len = 0;
114 u_int presskey_max = 0;
115 u_int i;
116
117 #ifndef CONFIG_ZERO_BOOTDELAY_CHECK
118 if (bootdelay == 0)
119 return 0;
120 #endif
121
122 # ifdef CONFIG_AUTOBOOT_PROMPT
123 printf(CONFIG_AUTOBOOT_PROMPT);
124 # endif
125
126 # ifdef CONFIG_AUTOBOOT_DELAY_STR
127 if (delaykey[0].str == NULL)
128 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
129 # endif
130 # ifdef CONFIG_AUTOBOOT_DELAY_STR2
131 if (delaykey[1].str == NULL)
132 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
133 # endif
134 # ifdef CONFIG_AUTOBOOT_STOP_STR
135 if (delaykey[2].str == NULL)
136 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
137 # endif
138 # ifdef CONFIG_AUTOBOOT_STOP_STR2
139 if (delaykey[3].str == NULL)
140 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
141 # endif
142
143 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
144 delaykey[i].len = delaykey[i].str == NULL ?
145 0 : strlen (delaykey[i].str);
146 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
147 MAX_DELAY_STOP_STR : delaykey[i].len;
148
149 presskey_max = presskey_max > delaykey[i].len ?
150 presskey_max : delaykey[i].len;
151
152 # if DEBUG_BOOTKEYS
153 printf("%s key:<%s>\n",
154 delaykey[i].retry ? "delay" : "stop",
155 delaykey[i].str ? delaykey[i].str : "NULL");
156 # endif
157 }
158
159 /* In order to keep up with incoming data, check timeout only
160 * when catch up.
161 */
162 do {
163 if (tstc()) {
164 if (presskey_len < presskey_max) {
165 presskey [presskey_len ++] = getc();
166 }
167 else {
168 for (i = 0; i < presskey_max - 1; i ++)
169 presskey [i] = presskey [i + 1];
170
171 presskey [i] = getc();
172 }
173 }
174
175 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
176 if (delaykey[i].len > 0 &&
177 presskey_len >= delaykey[i].len &&
178 memcmp (presskey + presskey_len - delaykey[i].len,
179 delaykey[i].str,
180 delaykey[i].len) == 0) {
181 # if DEBUG_BOOTKEYS
182 printf("got %skey\n",
183 delaykey[i].retry ? "delay" : "stop");
184 # endif
185
186 # ifdef CONFIG_BOOT_RETRY_TIME
187 /* don't retry auto boot */
188 if (! delaykey[i].retry)
189 retry_time = -1;
190 # endif
191 abort = 1;
192 }
193 }
194 } while (!abort && get_ticks() <= etime);
195
196 # if DEBUG_BOOTKEYS
197 if (!abort)
198 puts("key timeout\n");
199 # endif
200
201 #ifdef CONFIG_SILENT_CONSOLE
202 if (abort)
203 gd->flags &= ~GD_FLG_SILENT;
204 #endif
205
206 return abort;
207 }
208
209 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */
210
211 #ifdef CONFIG_MENUKEY
212 static int menukey = 0;
213 #endif
214
215 #ifndef CONFIG_MENU
216 static inline
217 #endif
218 int abortboot(int bootdelay)
219 {
220 int abort = 0;
221
222 #ifdef CONFIG_MENUPROMPT
223 printf(CONFIG_MENUPROMPT);
224 #else
225 if (bootdelay >= 0)
226 printf("Hit any key to stop autoboot: %2d ", bootdelay);
227 #endif
228
229 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
230 /*
231 * Check if key already pressed
232 * Don't check if bootdelay < 0
233 */
234 if (bootdelay >= 0) {
235 if (tstc()) { /* we got a key press */
236 (void) getc(); /* consume input */
237 puts ("\b\b\b 0");
238 abort = 1; /* don't auto boot */
239 }
240 }
241 #endif
242
243 while ((bootdelay > 0) && (!abort)) {
244 int i;
245
246 --bootdelay;
247 /* delay 100 * 10ms */
248 for (i=0; !abort && i<100; ++i) {
249 if (tstc()) { /* we got a key press */
250 abort = 1; /* don't auto boot */
251 bootdelay = 0; /* no more delay */
252 # ifdef CONFIG_MENUKEY
253 menukey = getc();
254 # else
255 (void) getc(); /* consume input */
256 # endif
257 break;
258 }
259 udelay(10000);
260 }
261
262 printf("\b\b\b%2d ", bootdelay);
263 }
264
265 putc('\n');
266
267 #ifdef CONFIG_SILENT_CONSOLE
268 if (abort)
269 gd->flags &= ~GD_FLG_SILENT;
270 #endif
271
272 return abort;
273 }
274 # endif /* CONFIG_AUTOBOOT_KEYED */
275 #endif /* CONFIG_BOOTDELAY >= 0 */
276
277 /****************************************************************************/
278
279 void main_loop (void)
280 {
281 #ifndef CONFIG_SYS_HUSH_PARSER
282 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
283 int len;
284 int rc = 1;
285 int flag;
286 #endif
287
288 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
289 char *s;
290 int bootdelay;
291 #endif
292 #ifdef CONFIG_PREBOOT
293 char *p;
294 #endif
295 #ifdef CONFIG_BOOTCOUNT_LIMIT
296 unsigned long bootcount = 0;
297 unsigned long bootlimit = 0;
298 char *bcs;
299 char bcs_set[16];
300 #endif /* CONFIG_BOOTCOUNT_LIMIT */
301
302 #ifdef CONFIG_BOOTCOUNT_LIMIT
303 bootcount = bootcount_load();
304 bootcount++;
305 bootcount_store (bootcount);
306 sprintf (bcs_set, "%lu", bootcount);
307 setenv ("bootcount", bcs_set);
308 bcs = getenv ("bootlimit");
309 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
310 #endif /* CONFIG_BOOTCOUNT_LIMIT */
311
312 #ifdef CONFIG_MODEM_SUPPORT
313 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init);
314 if (do_mdm_init) {
315 char *str = strdup(getenv("mdm_cmd"));
316 setenv ("preboot", str); /* set or delete definition */
317 if (str != NULL)
318 free (str);
319 mdm_init(); /* wait for modem connection */
320 }
321 #endif /* CONFIG_MODEM_SUPPORT */
322
323 #ifdef CONFIG_VERSION_VARIABLE
324 {
325 setenv ("ver", version_string); /* set version variable */
326 }
327 #endif /* CONFIG_VERSION_VARIABLE */
328
329 #ifdef CONFIG_SYS_HUSH_PARSER
330 u_boot_hush_start ();
331 #endif
332
333 #if defined(CONFIG_HUSH_INIT_VAR)
334 hush_init_var ();
335 #endif
336
337 #ifdef CONFIG_PREBOOT
338 if ((p = getenv ("preboot")) != NULL) {
339 # ifdef CONFIG_AUTOBOOT_KEYED
340 int prev = disable_ctrlc(1); /* disable Control C checking */
341 # endif
342
343 run_command_list(p, -1, 0);
344
345 # ifdef CONFIG_AUTOBOOT_KEYED
346 disable_ctrlc(prev); /* restore Control C checking */
347 # endif
348 }
349 #endif /* CONFIG_PREBOOT */
350
351 #if defined(CONFIG_UPDATE_TFTP)
352 update_tftp (0UL);
353 #endif /* CONFIG_UPDATE_TFTP */
354
355 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
356 s = getenv ("bootdelay");
357 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
358
359 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
360
361 #if defined(CONFIG_MENU_SHOW)
362 bootdelay = menu_show(bootdelay);
363 #endif
364 # ifdef CONFIG_BOOT_RETRY_TIME
365 init_cmd_timeout ();
366 # endif /* CONFIG_BOOT_RETRY_TIME */
367
368 #ifdef CONFIG_POST
369 if (gd->flags & GD_FLG_POSTFAIL) {
370 s = getenv("failbootcmd");
371 }
372 else
373 #endif /* CONFIG_POST */
374 #ifdef CONFIG_BOOTCOUNT_LIMIT
375 if (bootlimit && (bootcount > bootlimit)) {
376 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
377 (unsigned)bootlimit);
378 s = getenv ("altbootcmd");
379 }
380 else
381 #endif /* CONFIG_BOOTCOUNT_LIMIT */
382 s = getenv ("bootcmd");
383
384 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
385
386 if (bootdelay != -1 && s && !abortboot(bootdelay)) {
387 # ifdef CONFIG_AUTOBOOT_KEYED
388 int prev = disable_ctrlc(1); /* disable Control C checking */
389 # endif
390
391 run_command_list(s, -1, 0);
392
393 # ifdef CONFIG_AUTOBOOT_KEYED
394 disable_ctrlc(prev); /* restore Control C checking */
395 # endif
396 }
397
398 # ifdef CONFIG_MENUKEY
399 if (menukey == CONFIG_MENUKEY) {
400 s = getenv("menucmd");
401 if (s)
402 run_command_list(s, -1, 0);
403 }
404 #endif /* CONFIG_MENUKEY */
405 #endif /* CONFIG_BOOTDELAY */
406
407 /*
408 * Main Loop for Monitor Command Processing
409 */
410 #ifdef CONFIG_SYS_HUSH_PARSER
411 parse_file_outer();
412 /* This point is never reached */
413 for (;;);
414 #else
415 for (;;) {
416 #ifdef CONFIG_BOOT_RETRY_TIME
417 if (rc >= 0) {
418 /* Saw enough of a valid command to
419 * restart the timeout.
420 */
421 reset_cmd_timeout();
422 }
423 #endif
424 len = readline (CONFIG_SYS_PROMPT);
425
426 flag = 0; /* assume no special flags for now */
427 if (len > 0)
428 strcpy (lastcommand, console_buffer);
429 else if (len == 0)
430 flag |= CMD_FLAG_REPEAT;
431 #ifdef CONFIG_BOOT_RETRY_TIME
432 else if (len == -2) {
433 /* -2 means timed out, retry autoboot
434 */
435 puts ("\nTimed out waiting for command\n");
436 # ifdef CONFIG_RESET_TO_RETRY
437 /* Reinit board to run initialization code again */
438 do_reset (NULL, 0, 0, NULL);
439 # else
440 return; /* retry autoboot */
441 # endif
442 }
443 #endif
444
445 if (len == -1)
446 puts ("<INTERRUPT>\n");
447 else
448 rc = run_command(lastcommand, flag);
449
450 if (rc <= 0) {
451 /* invalid command or not repeatable, forget it */
452 lastcommand[0] = 0;
453 }
454 }
455 #endif /*CONFIG_SYS_HUSH_PARSER*/
456 }
457
458 #ifdef CONFIG_BOOT_RETRY_TIME
459 /***************************************************************************
460 * initialize command line timeout
461 */
462 void init_cmd_timeout(void)
463 {
464 char *s = getenv ("bootretry");
465
466 if (s != NULL)
467 retry_time = (int)simple_strtol(s, NULL, 10);
468 else
469 retry_time = CONFIG_BOOT_RETRY_TIME;
470
471 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
472 retry_time = CONFIG_BOOT_RETRY_MIN;
473 }
474
475 /***************************************************************************
476 * reset command line timeout to retry_time seconds
477 */
478 void reset_cmd_timeout(void)
479 {
480 endtime = endtick(retry_time);
481 }
482 #endif
483
484 #ifdef CONFIG_CMDLINE_EDITING
485
486 /*
487 * cmdline-editing related codes from vivi.
488 * Author: Janghoon Lyu <nandy@mizi.com>
489 */
490
491 #define putnstr(str,n) do { \
492 printf ("%.*s", (int)n, str); \
493 } while (0)
494
495 #define CTL_CH(c) ((c) - 'a' + 1)
496 #define CTL_BACKSPACE ('\b')
497 #define DEL ((char)255)
498 #define DEL7 ((char)127)
499 #define CREAD_HIST_CHAR ('!')
500
501 #define getcmd_putch(ch) putc(ch)
502 #define getcmd_getch() getc()
503 #define getcmd_cbeep() getcmd_putch('\a')
504
505 #define HIST_MAX 20
506 #define HIST_SIZE CONFIG_SYS_CBSIZE
507
508 static int hist_max;
509 static int hist_add_idx;
510 static int hist_cur = -1;
511 static unsigned hist_num;
512
513 static char *hist_list[HIST_MAX];
514 static char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */
515
516 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
517
518 static void hist_init(void)
519 {
520 int i;
521
522 hist_max = 0;
523 hist_add_idx = 0;
524 hist_cur = -1;
525 hist_num = 0;
526
527 for (i = 0; i < HIST_MAX; i++) {
528 hist_list[i] = hist_lines[i];
529 hist_list[i][0] = '\0';
530 }
531 }
532
533 static void cread_add_to_hist(char *line)
534 {
535 strcpy(hist_list[hist_add_idx], line);
536
537 if (++hist_add_idx >= HIST_MAX)
538 hist_add_idx = 0;
539
540 if (hist_add_idx > hist_max)
541 hist_max = hist_add_idx;
542
543 hist_num++;
544 }
545
546 static char* hist_prev(void)
547 {
548 char *ret;
549 int old_cur;
550
551 if (hist_cur < 0)
552 return NULL;
553
554 old_cur = hist_cur;
555 if (--hist_cur < 0)
556 hist_cur = hist_max;
557
558 if (hist_cur == hist_add_idx) {
559 hist_cur = old_cur;
560 ret = NULL;
561 } else
562 ret = hist_list[hist_cur];
563
564 return (ret);
565 }
566
567 static char* hist_next(void)
568 {
569 char *ret;
570
571 if (hist_cur < 0)
572 return NULL;
573
574 if (hist_cur == hist_add_idx)
575 return NULL;
576
577 if (++hist_cur > hist_max)
578 hist_cur = 0;
579
580 if (hist_cur == hist_add_idx) {
581 ret = "";
582 } else
583 ret = hist_list[hist_cur];
584
585 return (ret);
586 }
587
588 #ifndef CONFIG_CMDLINE_EDITING
589 static void cread_print_hist_list(void)
590 {
591 int i;
592 unsigned long n;
593
594 n = hist_num - hist_max;
595
596 i = hist_add_idx + 1;
597 while (1) {
598 if (i > hist_max)
599 i = 0;
600 if (i == hist_add_idx)
601 break;
602 printf("%s\n", hist_list[i]);
603 n++;
604 i++;
605 }
606 }
607 #endif /* CONFIG_CMDLINE_EDITING */
608
609 #define BEGINNING_OF_LINE() { \
610 while (num) { \
611 getcmd_putch(CTL_BACKSPACE); \
612 num--; \
613 } \
614 }
615
616 #define ERASE_TO_EOL() { \
617 if (num < eol_num) { \
618 printf("%*s", (int)(eol_num - num), ""); \
619 do { \
620 getcmd_putch(CTL_BACKSPACE); \
621 } while (--eol_num > num); \
622 } \
623 }
624
625 #define REFRESH_TO_EOL() { \
626 if (num < eol_num) { \
627 wlen = eol_num - num; \
628 putnstr(buf + num, wlen); \
629 num = eol_num; \
630 } \
631 }
632
633 static void cread_add_char(char ichar, int insert, unsigned long *num,
634 unsigned long *eol_num, char *buf, unsigned long len)
635 {
636 unsigned long wlen;
637
638 /* room ??? */
639 if (insert || *num == *eol_num) {
640 if (*eol_num > len - 1) {
641 getcmd_cbeep();
642 return;
643 }
644 (*eol_num)++;
645 }
646
647 if (insert) {
648 wlen = *eol_num - *num;
649 if (wlen > 1) {
650 memmove(&buf[*num+1], &buf[*num], wlen-1);
651 }
652
653 buf[*num] = ichar;
654 putnstr(buf + *num, wlen);
655 (*num)++;
656 while (--wlen) {
657 getcmd_putch(CTL_BACKSPACE);
658 }
659 } else {
660 /* echo the character */
661 wlen = 1;
662 buf[*num] = ichar;
663 putnstr(buf + *num, wlen);
664 (*num)++;
665 }
666 }
667
668 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
669 unsigned long *eol_num, char *buf, unsigned long len)
670 {
671 while (strsize--) {
672 cread_add_char(*str, insert, num, eol_num, buf, len);
673 str++;
674 }
675 }
676
677 static int cread_line(const char *const prompt, char *buf, unsigned int *len,
678 int timeout)
679 {
680 unsigned long num = 0;
681 unsigned long eol_num = 0;
682 unsigned long wlen;
683 char ichar;
684 int insert = 1;
685 int esc_len = 0;
686 char esc_save[8];
687 int init_len = strlen(buf);
688 int first = 1;
689
690 if (init_len)
691 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
692
693 while (1) {
694 #ifdef CONFIG_BOOT_RETRY_TIME
695 while (!tstc()) { /* while no incoming data */
696 if (retry_time >= 0 && get_ticks() > endtime)
697 return (-2); /* timed out */
698 WATCHDOG_RESET();
699 }
700 #endif
701 if (first && timeout) {
702 uint64_t etime = endtick(timeout);
703
704 while (!tstc()) { /* while no incoming data */
705 if (get_ticks() >= etime)
706 return -2; /* timed out */
707 WATCHDOG_RESET();
708 }
709 first = 0;
710 }
711
712 ichar = getcmd_getch();
713
714 if ((ichar == '\n') || (ichar == '\r')) {
715 putc('\n');
716 break;
717 }
718
719 /*
720 * handle standard linux xterm esc sequences for arrow key, etc.
721 */
722 if (esc_len != 0) {
723 if (esc_len == 1) {
724 if (ichar == '[') {
725 esc_save[esc_len] = ichar;
726 esc_len = 2;
727 } else {
728 cread_add_str(esc_save, esc_len, insert,
729 &num, &eol_num, buf, *len);
730 esc_len = 0;
731 }
732 continue;
733 }
734
735 switch (ichar) {
736
737 case 'D': /* <- key */
738 ichar = CTL_CH('b');
739 esc_len = 0;
740 break;
741 case 'C': /* -> key */
742 ichar = CTL_CH('f');
743 esc_len = 0;
744 break; /* pass off to ^F handler */
745 case 'H': /* Home key */
746 ichar = CTL_CH('a');
747 esc_len = 0;
748 break; /* pass off to ^A handler */
749 case 'A': /* up arrow */
750 ichar = CTL_CH('p');
751 esc_len = 0;
752 break; /* pass off to ^P handler */
753 case 'B': /* down arrow */
754 ichar = CTL_CH('n');
755 esc_len = 0;
756 break; /* pass off to ^N handler */
757 default:
758 esc_save[esc_len++] = ichar;
759 cread_add_str(esc_save, esc_len, insert,
760 &num, &eol_num, buf, *len);
761 esc_len = 0;
762 continue;
763 }
764 }
765
766 switch (ichar) {
767 case 0x1b:
768 if (esc_len == 0) {
769 esc_save[esc_len] = ichar;
770 esc_len = 1;
771 } else {
772 puts("impossible condition #876\n");
773 esc_len = 0;
774 }
775 break;
776
777 case CTL_CH('a'):
778 BEGINNING_OF_LINE();
779 break;
780 case CTL_CH('c'): /* ^C - break */
781 *buf = '\0'; /* discard input */
782 return (-1);
783 case CTL_CH('f'):
784 if (num < eol_num) {
785 getcmd_putch(buf[num]);
786 num++;
787 }
788 break;
789 case CTL_CH('b'):
790 if (num) {
791 getcmd_putch(CTL_BACKSPACE);
792 num--;
793 }
794 break;
795 case CTL_CH('d'):
796 if (num < eol_num) {
797 wlen = eol_num - num - 1;
798 if (wlen) {
799 memmove(&buf[num], &buf[num+1], wlen);
800 putnstr(buf + num, wlen);
801 }
802
803 getcmd_putch(' ');
804 do {
805 getcmd_putch(CTL_BACKSPACE);
806 } while (wlen--);
807 eol_num--;
808 }
809 break;
810 case CTL_CH('k'):
811 ERASE_TO_EOL();
812 break;
813 case CTL_CH('e'):
814 REFRESH_TO_EOL();
815 break;
816 case CTL_CH('o'):
817 insert = !insert;
818 break;
819 case CTL_CH('x'):
820 case CTL_CH('u'):
821 BEGINNING_OF_LINE();
822 ERASE_TO_EOL();
823 break;
824 case DEL:
825 case DEL7:
826 case 8:
827 if (num) {
828 wlen = eol_num - num;
829 num--;
830 memmove(&buf[num], &buf[num+1], wlen);
831 getcmd_putch(CTL_BACKSPACE);
832 putnstr(buf + num, wlen);
833 getcmd_putch(' ');
834 do {
835 getcmd_putch(CTL_BACKSPACE);
836 } while (wlen--);
837 eol_num--;
838 }
839 break;
840 case CTL_CH('p'):
841 case CTL_CH('n'):
842 {
843 char * hline;
844
845 esc_len = 0;
846
847 if (ichar == CTL_CH('p'))
848 hline = hist_prev();
849 else
850 hline = hist_next();
851
852 if (!hline) {
853 getcmd_cbeep();
854 continue;
855 }
856
857 /* nuke the current line */
858 /* first, go home */
859 BEGINNING_OF_LINE();
860
861 /* erase to end of line */
862 ERASE_TO_EOL();
863
864 /* copy new line into place and display */
865 strcpy(buf, hline);
866 eol_num = strlen(buf);
867 REFRESH_TO_EOL();
868 continue;
869 }
870 #ifdef CONFIG_AUTO_COMPLETE
871 case '\t': {
872 int num2, col;
873
874 /* do not autocomplete when in the middle */
875 if (num < eol_num) {
876 getcmd_cbeep();
877 break;
878 }
879
880 buf[num] = '\0';
881 col = strlen(prompt) + eol_num;
882 num2 = num;
883 if (cmd_auto_complete(prompt, buf, &num2, &col)) {
884 col = num2 - num;
885 num += col;
886 eol_num += col;
887 }
888 break;
889 }
890 #endif
891 default:
892 cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
893 break;
894 }
895 }
896 *len = eol_num;
897 buf[eol_num] = '\0'; /* lose the newline */
898
899 if (buf[0] && buf[0] != CREAD_HIST_CHAR)
900 cread_add_to_hist(buf);
901 hist_cur = hist_add_idx;
902
903 return 0;
904 }
905
906 #endif /* CONFIG_CMDLINE_EDITING */
907
908 /****************************************************************************/
909
910 /*
911 * Prompt for input and read a line.
912 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
913 * time out when time goes past endtime (timebase time in ticks).
914 * Return: number of read characters
915 * -1 if break
916 * -2 if timed out
917 */
918 int readline (const char *const prompt)
919 {
920 /*
921 * If console_buffer isn't 0-length the user will be prompted to modify
922 * it instead of entering it from scratch as desired.
923 */
924 console_buffer[0] = '\0';
925
926 return readline_into_buffer(prompt, console_buffer, 0);
927 }
928
929
930 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
931 {
932 char *p = buffer;
933 #ifdef CONFIG_CMDLINE_EDITING
934 unsigned int len = CONFIG_SYS_CBSIZE;
935 int rc;
936 static int initted = 0;
937
938 /*
939 * History uses a global array which is not
940 * writable until after relocation to RAM.
941 * Revert to non-history version if still
942 * running from flash.
943 */
944 if (gd->flags & GD_FLG_RELOC) {
945 if (!initted) {
946 hist_init();
947 initted = 1;
948 }
949
950 if (prompt)
951 puts (prompt);
952
953 rc = cread_line(prompt, p, &len, timeout);
954 return rc < 0 ? rc : len;
955
956 } else {
957 #endif /* CONFIG_CMDLINE_EDITING */
958 char * p_buf = p;
959 int n = 0; /* buffer index */
960 int plen = 0; /* prompt length */
961 int col; /* output column cnt */
962 char c;
963
964 /* print prompt */
965 if (prompt) {
966 plen = strlen (prompt);
967 puts (prompt);
968 }
969 col = plen;
970
971 for (;;) {
972 #ifdef CONFIG_BOOT_RETRY_TIME
973 while (!tstc()) { /* while no incoming data */
974 if (retry_time >= 0 && get_ticks() > endtime)
975 return (-2); /* timed out */
976 WATCHDOG_RESET();
977 }
978 #endif
979 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
980
981 #ifdef CONFIG_SHOW_ACTIVITY
982 while (!tstc()) {
983 show_activity(0);
984 WATCHDOG_RESET();
985 }
986 #endif
987 c = getc();
988
989 /*
990 * Special character handling
991 */
992 switch (c) {
993 case '\r': /* Enter */
994 case '\n':
995 *p = '\0';
996 puts ("\r\n");
997 return (p - p_buf);
998
999 case '\0': /* nul */
1000 continue;
1001
1002 case 0x03: /* ^C - break */
1003 p_buf[0] = '\0'; /* discard input */
1004 return (-1);
1005
1006 case 0x15: /* ^U - erase line */
1007 while (col > plen) {
1008 puts (erase_seq);
1009 --col;
1010 }
1011 p = p_buf;
1012 n = 0;
1013 continue;
1014
1015 case 0x17: /* ^W - erase word */
1016 p=delete_char(p_buf, p, &col, &n, plen);
1017 while ((n > 0) && (*p != ' ')) {
1018 p=delete_char(p_buf, p, &col, &n, plen);
1019 }
1020 continue;
1021
1022 case 0x08: /* ^H - backspace */
1023 case 0x7F: /* DEL - backspace */
1024 p=delete_char(p_buf, p, &col, &n, plen);
1025 continue;
1026
1027 default:
1028 /*
1029 * Must be a normal character then
1030 */
1031 if (n < CONFIG_SYS_CBSIZE-2) {
1032 if (c == '\t') { /* expand TABs */
1033 #ifdef CONFIG_AUTO_COMPLETE
1034 /* if auto completion triggered just continue */
1035 *p = '\0';
1036 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1037 p = p_buf + n; /* reset */
1038 continue;
1039 }
1040 #endif
1041 puts (tab_seq+(col&07));
1042 col += 8 - (col&07);
1043 } else {
1044 ++col; /* echo input */
1045 putc (c);
1046 }
1047 *p++ = c;
1048 ++n;
1049 } else { /* Buffer full */
1050 putc ('\a');
1051 }
1052 }
1053 }
1054 #ifdef CONFIG_CMDLINE_EDITING
1055 }
1056 #endif
1057 }
1058
1059 /****************************************************************************/
1060
1061 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1062 {
1063 char *s;
1064
1065 if (*np == 0) {
1066 return (p);
1067 }
1068
1069 if (*(--p) == '\t') { /* will retype the whole line */
1070 while (*colp > plen) {
1071 puts (erase_seq);
1072 (*colp)--;
1073 }
1074 for (s=buffer; s<p; ++s) {
1075 if (*s == '\t') {
1076 puts (tab_seq+((*colp) & 07));
1077 *colp += 8 - ((*colp) & 07);
1078 } else {
1079 ++(*colp);
1080 putc (*s);
1081 }
1082 }
1083 } else {
1084 puts (erase_seq);
1085 (*colp)--;
1086 }
1087 (*np)--;
1088 return (p);
1089 }
1090
1091 /****************************************************************************/
1092
1093 int parse_line (char *line, char *argv[])
1094 {
1095 int nargs = 0;
1096
1097 #ifdef DEBUG_PARSER
1098 printf ("parse_line: \"%s\"\n", line);
1099 #endif
1100 while (nargs < CONFIG_SYS_MAXARGS) {
1101
1102 /* skip any white space */
1103 while (isblank(*line))
1104 ++line;
1105
1106 if (*line == '\0') { /* end of line, no more args */
1107 argv[nargs] = NULL;
1108 #ifdef DEBUG_PARSER
1109 printf ("parse_line: nargs=%d\n", nargs);
1110 #endif
1111 return (nargs);
1112 }
1113
1114 argv[nargs++] = line; /* begin of argument string */
1115
1116 /* find end of string */
1117 while (*line && !isblank(*line))
1118 ++line;
1119
1120 if (*line == '\0') { /* end of line, no more args */
1121 argv[nargs] = NULL;
1122 #ifdef DEBUG_PARSER
1123 printf ("parse_line: nargs=%d\n", nargs);
1124 #endif
1125 return (nargs);
1126 }
1127
1128 *line++ = '\0'; /* terminate current arg */
1129 }
1130
1131 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1132
1133 #ifdef DEBUG_PARSER
1134 printf ("parse_line: nargs=%d\n", nargs);
1135 #endif
1136 return (nargs);
1137 }
1138
1139 /****************************************************************************/
1140
1141 #ifndef CONFIG_SYS_HUSH_PARSER
1142 static void process_macros (const char *input, char *output)
1143 {
1144 char c, prev;
1145 const char *varname_start = NULL;
1146 int inputcnt = strlen (input);
1147 int outputcnt = CONFIG_SYS_CBSIZE;
1148 int state = 0; /* 0 = waiting for '$' */
1149
1150 /* 1 = waiting for '(' or '{' */
1151 /* 2 = waiting for ')' or '}' */
1152 /* 3 = waiting for ''' */
1153 #ifdef DEBUG_PARSER
1154 char *output_start = output;
1155
1156 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1157 input);
1158 #endif
1159
1160 prev = '\0'; /* previous character */
1161
1162 while (inputcnt && outputcnt) {
1163 c = *input++;
1164 inputcnt--;
1165
1166 if (state != 3) {
1167 /* remove one level of escape characters */
1168 if ((c == '\\') && (prev != '\\')) {
1169 if (inputcnt-- == 0)
1170 break;
1171 prev = c;
1172 c = *input++;
1173 }
1174 }
1175
1176 switch (state) {
1177 case 0: /* Waiting for (unescaped) $ */
1178 if ((c == '\'') && (prev != '\\')) {
1179 state = 3;
1180 break;
1181 }
1182 if ((c == '$') && (prev != '\\')) {
1183 state++;
1184 } else {
1185 *(output++) = c;
1186 outputcnt--;
1187 }
1188 break;
1189 case 1: /* Waiting for ( */
1190 if (c == '(' || c == '{') {
1191 state++;
1192 varname_start = input;
1193 } else {
1194 state = 0;
1195 *(output++) = '$';
1196 outputcnt--;
1197
1198 if (outputcnt) {
1199 *(output++) = c;
1200 outputcnt--;
1201 }
1202 }
1203 break;
1204 case 2: /* Waiting for ) */
1205 if (c == ')' || c == '}') {
1206 int i;
1207 char envname[CONFIG_SYS_CBSIZE], *envval;
1208 int envcnt = input - varname_start - 1; /* Varname # of chars */
1209
1210 /* Get the varname */
1211 for (i = 0; i < envcnt; i++) {
1212 envname[i] = varname_start[i];
1213 }
1214 envname[i] = 0;
1215
1216 /* Get its value */
1217 envval = getenv (envname);
1218
1219 /* Copy into the line if it exists */
1220 if (envval != NULL)
1221 while ((*envval) && outputcnt) {
1222 *(output++) = *(envval++);
1223 outputcnt--;
1224 }
1225 /* Look for another '$' */
1226 state = 0;
1227 }
1228 break;
1229 case 3: /* Waiting for ' */
1230 if ((c == '\'') && (prev != '\\')) {
1231 state = 0;
1232 } else {
1233 *(output++) = c;
1234 outputcnt--;
1235 }
1236 break;
1237 }
1238 prev = c;
1239 }
1240
1241 if (outputcnt)
1242 *output = 0;
1243 else
1244 *(output - 1) = 0;
1245
1246 #ifdef DEBUG_PARSER
1247 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1248 strlen (output_start), output_start);
1249 #endif
1250 }
1251
1252 /****************************************************************************
1253 * returns:
1254 * 1 - command executed, repeatable
1255 * 0 - command executed but not repeatable, interrupted commands are
1256 * always considered not repeatable
1257 * -1 - not executed (unrecognized, bootd recursion or too many args)
1258 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1259 * considered unrecognized)
1260 *
1261 * WARNING:
1262 *
1263 * We must create a temporary copy of the command since the command we get
1264 * may be the result from getenv(), which returns a pointer directly to
1265 * the environment data, which may change magicly when the command we run
1266 * creates or modifies environment variables (like "bootp" does).
1267 */
1268 static int builtin_run_command(const char *cmd, int flag)
1269 {
1270 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */
1271 char *token; /* start of token in cmdbuf */
1272 char *sep; /* end of token (separator) in cmdbuf */
1273 char finaltoken[CONFIG_SYS_CBSIZE];
1274 char *str = cmdbuf;
1275 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
1276 int argc, inquotes;
1277 int repeatable = 1;
1278 int rc = 0;
1279
1280 #ifdef DEBUG_PARSER
1281 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1282 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */
1283 puts ("\"\n");
1284 #endif
1285
1286 clear_ctrlc(); /* forget any previous Control C */
1287
1288 if (!cmd || !*cmd) {
1289 return -1; /* empty command */
1290 }
1291
1292 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1293 puts ("## Command too long!\n");
1294 return -1;
1295 }
1296
1297 strcpy (cmdbuf, cmd);
1298
1299 /* Process separators and check for invalid
1300 * repeatable commands
1301 */
1302
1303 #ifdef DEBUG_PARSER
1304 printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1305 #endif
1306 while (*str) {
1307
1308 /*
1309 * Find separator, or string end
1310 * Allow simple escape of ';' by writing "\;"
1311 */
1312 for (inquotes = 0, sep = str; *sep; sep++) {
1313 if ((*sep=='\'') &&
1314 (*(sep-1) != '\\'))
1315 inquotes=!inquotes;
1316
1317 if (!inquotes &&
1318 (*sep == ';') && /* separator */
1319 ( sep != str) && /* past string start */
1320 (*(sep-1) != '\\')) /* and NOT escaped */
1321 break;
1322 }
1323
1324 /*
1325 * Limit the token to data between separators
1326 */
1327 token = str;
1328 if (*sep) {
1329 str = sep + 1; /* start of command for next pass */
1330 *sep = '\0';
1331 }
1332 else
1333 str = sep; /* no more commands for next pass */
1334 #ifdef DEBUG_PARSER
1335 printf ("token: \"%s\"\n", token);
1336 #endif
1337
1338 /* find macros in this token and replace them */
1339 process_macros (token, finaltoken);
1340
1341 /* Extract arguments */
1342 if ((argc = parse_line (finaltoken, argv)) == 0) {
1343 rc = -1; /* no command at all */
1344 continue;
1345 }
1346
1347 if (cmd_process(flag, argc, argv, &repeatable))
1348 rc = -1;
1349
1350 /* Did the user stop this? */
1351 if (had_ctrlc ())
1352 return -1; /* if stopped then not repeatable */
1353 }
1354
1355 return rc ? rc : repeatable;
1356 }
1357 #endif
1358
1359 /*
1360 * Run a command using the selected parser.
1361 *
1362 * @param cmd Command to run
1363 * @param flag Execution flags (CMD_FLAG_...)
1364 * @return 0 on success, or != 0 on error.
1365 */
1366 int run_command(const char *cmd, int flag)
1367 {
1368 #ifndef CONFIG_SYS_HUSH_PARSER
1369 /*
1370 * builtin_run_command can return 0 or 1 for success, so clean up
1371 * its result.
1372 */
1373 if (builtin_run_command(cmd, flag) == -1)
1374 return 1;
1375
1376 return 0;
1377 #else
1378 return parse_string_outer(cmd,
1379 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
1380 #endif
1381 }
1382
1383 #ifndef CONFIG_SYS_HUSH_PARSER
1384 /**
1385 * Execute a list of command separated by ; or \n using the built-in parser.
1386 *
1387 * This function cannot take a const char * for the command, since if it
1388 * finds newlines in the string, it replaces them with \0.
1389 *
1390 * @param cmd String containing list of commands
1391 * @param flag Execution flags (CMD_FLAG_...)
1392 * @return 0 on success, or != 0 on error.
1393 */
1394 static int builtin_run_command_list(char *cmd, int flag)
1395 {
1396 char *line, *next;
1397 int rcode = 0;
1398
1399 /*
1400 * Break into individual lines, and execute each line; terminate on
1401 * error.
1402 */
1403 line = next = cmd;
1404 while (*next) {
1405 if (*next == '\n') {
1406 *next = '\0';
1407 /* run only non-empty commands */
1408 if (*line) {
1409 debug("** exec: \"%s\"\n", line);
1410 if (builtin_run_command(line, 0) < 0) {
1411 rcode = 1;
1412 break;
1413 }
1414 }
1415 line = next + 1;
1416 }
1417 ++next;
1418 }
1419 if (rcode == 0 && *line)
1420 rcode = (builtin_run_command(line, 0) >= 0);
1421
1422 return rcode;
1423 }
1424 #endif
1425
1426 int run_command_list(const char *cmd, int len, int flag)
1427 {
1428 int need_buff = 1;
1429 char *buff = (char *)cmd; /* cast away const */
1430 int rcode = 0;
1431
1432 if (len == -1) {
1433 len = strlen(cmd);
1434 #ifdef CONFIG_SYS_HUSH_PARSER
1435 /* hush will never change our string */
1436 need_buff = 0;
1437 #else
1438 /* the built-in parser will change our string if it sees \n */
1439 need_buff = strchr(cmd, '\n') != NULL;
1440 #endif
1441 }
1442 if (need_buff) {
1443 buff = malloc(len + 1);
1444 if (!buff)
1445 return 1;
1446 memcpy(buff, cmd, len);
1447 buff[len] = '\0';
1448 }
1449 #ifdef CONFIG_SYS_HUSH_PARSER
1450 rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON);
1451 #else
1452 /*
1453 * This function will overwrite any \n it sees with a \0, which
1454 * is why it can't work with a const char *. Here we are making
1455 * using of internal knowledge of this function, to avoid always
1456 * doing a malloc() which is actually required only in a case that
1457 * is pretty rare.
1458 */
1459 rcode = builtin_run_command_list(buff, flag);
1460 if (need_buff)
1461 free(buff);
1462 #endif
1463
1464 return rcode;
1465 }
1466
1467 /****************************************************************************/
1468
1469 #if defined(CONFIG_CMD_RUN)
1470 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1471 {
1472 int i;
1473
1474 if (argc < 2)
1475 return CMD_RET_USAGE;
1476
1477 for (i=1; i<argc; ++i) {
1478 char *arg;
1479
1480 if ((arg = getenv (argv[i])) == NULL) {
1481 printf ("## Error: \"%s\" not defined\n", argv[i]);
1482 return 1;
1483 }
1484
1485 if (run_command(arg, flag) != 0)
1486 return 1;
1487 }
1488 return 0;
1489 }
1490 #endif
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