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