]> git.ipfire.org Git - people/ms/u-boot.git/blob - common/main.c
projects / people / ms / u-boot.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
cmd_usage(): simplify return code handling
[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 * const argv[]); /* for do_reset() prototype */
55 #endif
56
57 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char * const 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 + 1]; /* 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 #ifdef CONFIG_BOOTCOUNT_LIMIT
309 bootcount = bootcount_load();
310 bootcount++;
311 bootcount_store (bootcount);
312 sprintf (bcs_set, "%lu", bootcount);
313 setenv ("bootcount", bcs_set);
314 bcs = getenv ("bootlimit");
315 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
316 #endif /* CONFIG_BOOTCOUNT_LIMIT */
317
318 #ifdef CONFIG_MODEM_SUPPORT
319 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init);
320 if (do_mdm_init) {
321 char *str = strdup(getenv("mdm_cmd"));
322 setenv ("preboot", str); /* set or delete definition */
323 if (str != NULL)
324 free (str);
325 mdm_init(); /* wait for modem connection */
326 }
327 #endif /* CONFIG_MODEM_SUPPORT */
328
329 #ifdef CONFIG_VERSION_VARIABLE
330 {
331 extern char version_string[];
332
333 setenv ("ver", version_string); /* set version variable */
334 }
335 #endif /* CONFIG_VERSION_VARIABLE */
336
337 #ifdef CONFIG_SYS_HUSH_PARSER
338 u_boot_hush_start ();
339 #endif
340
341 #if defined(CONFIG_HUSH_INIT_VAR)
342 hush_init_var ();
343 #endif
344
345 #ifdef CONFIG_AUTO_COMPLETE
346 install_auto_complete();
347 #endif
348
349 #ifdef CONFIG_PREBOOT
350 if ((p = getenv ("preboot")) != NULL) {
351 # ifdef CONFIG_AUTOBOOT_KEYED
352 int prev = disable_ctrlc(1); /* disable Control C checking */
353 # endif
354
355 # ifndef CONFIG_SYS_HUSH_PARSER
356 run_command (p, 0);
357 # else
358 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
359 FLAG_EXIT_FROM_LOOP);
360 # endif
361
362 # ifdef CONFIG_AUTOBOOT_KEYED
363 disable_ctrlc(prev); /* restore Control C checking */
364 # endif
365 }
366 #endif /* CONFIG_PREBOOT */
367
368 #if defined(CONFIG_UPDATE_TFTP)
369 update_tftp ();
370 #endif /* CONFIG_UPDATE_TFTP */
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 /*
433 * Main Loop for Monitor Command Processing
434 */
435 #ifdef CONFIG_SYS_HUSH_PARSER
436 parse_file_outer();
437 /* This point is never reached */
438 for (;;);
439 #else
440 for (;;) {
441 #ifdef CONFIG_BOOT_RETRY_TIME
442 if (rc >= 0) {
443 /* Saw enough of a valid command to
444 * restart the timeout.
445 */
446 reset_cmd_timeout();
447 }
448 #endif
449 len = readline (CONFIG_SYS_PROMPT);
450
451 flag = 0; /* assume no special flags for now */
452 if (len > 0)
453 strcpy (lastcommand, console_buffer);
454 else if (len == 0)
455 flag |= CMD_FLAG_REPEAT;
456 #ifdef CONFIG_BOOT_RETRY_TIME
457 else if (len == -2) {
458 /* -2 means timed out, retry autoboot
459 */
460 puts ("\nTimed out waiting for command\n");
461 # ifdef CONFIG_RESET_TO_RETRY
462 /* Reinit board to run initialization code again */
463 do_reset (NULL, 0, 0, NULL);
464 # else
465 return; /* retry autoboot */
466 # endif
467 }
468 #endif
469
470 if (len == -1)
471 puts ("<INTERRUPT>\n");
472 else
473 rc = run_command (lastcommand, flag);
474
475 if (rc <= 0) {
476 /* invalid command or not repeatable, forget it */
477 lastcommand[0] = 0;
478 }
479 }
480 #endif /*CONFIG_SYS_HUSH_PARSER*/
481 }
482
483 #ifdef CONFIG_BOOT_RETRY_TIME
484 /***************************************************************************
485 * initialize command line timeout
486 */
487 void init_cmd_timeout(void)
488 {
489 char *s = getenv ("bootretry");
490
491 if (s != NULL)
492 retry_time = (int)simple_strtol(s, NULL, 10);
493 else
494 retry_time = CONFIG_BOOT_RETRY_TIME;
495
496 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
497 retry_time = CONFIG_BOOT_RETRY_MIN;
498 }
499
500 /***************************************************************************
501 * reset command line timeout to retry_time seconds
502 */
503 void reset_cmd_timeout(void)
504 {
505 endtime = endtick(retry_time);
506 }
507 #endif
508
509 #ifdef CONFIG_CMDLINE_EDITING
510
511 /*
512 * cmdline-editing related codes from vivi.
513 * Author: Janghoon Lyu <nandy@mizi.com>
514 */
515
516 #define putnstr(str,n) do { \
517 printf ("%.*s", (int)n, str); \
518 } while (0)
519
520 #define CTL_CH(c) ((c) - 'a' + 1)
521
522 #define MAX_CMDBUF_SIZE CONFIG_SYS_CBSIZE
523
524 #define CTL_BACKSPACE ('\b')
525 #define DEL ((char)255)
526 #define DEL7 ((char)127)
527 #define CREAD_HIST_CHAR ('!')
528
529 #define getcmd_putch(ch) putc(ch)
530 #define getcmd_getch() getc()
531 #define getcmd_cbeep() getcmd_putch('\a')
532
533 #define HIST_MAX 20
534 #define HIST_SIZE MAX_CMDBUF_SIZE
535
536 static int hist_max = 0;
537 static int hist_add_idx = 0;
538 static int hist_cur = -1;
539 unsigned hist_num = 0;
540
541 char* hist_list[HIST_MAX];
542 char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */
543
544 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
545
546 static void hist_init(void)
547 {
548 int i;
549
550 hist_max = 0;
551 hist_add_idx = 0;
552 hist_cur = -1;
553 hist_num = 0;
554
555 for (i = 0; i < HIST_MAX; i++) {
556 hist_list[i] = hist_lines[i];
557 hist_list[i][0] = '\0';
558 }
559 }
560
561 static void cread_add_to_hist(char *line)
562 {
563 strcpy(hist_list[hist_add_idx], line);
564
565 if (++hist_add_idx >= HIST_MAX)
566 hist_add_idx = 0;
567
568 if (hist_add_idx > hist_max)
569 hist_max = hist_add_idx;
570
571 hist_num++;
572 }
573
574 static char* hist_prev(void)
575 {
576 char *ret;
577 int old_cur;
578
579 if (hist_cur < 0)
580 return NULL;
581
582 old_cur = hist_cur;
583 if (--hist_cur < 0)
584 hist_cur = hist_max;
585
586 if (hist_cur == hist_add_idx) {
587 hist_cur = old_cur;
588 ret = NULL;
589 } else
590 ret = hist_list[hist_cur];
591
592 return (ret);
593 }
594
595 static char* hist_next(void)
596 {
597 char *ret;
598
599 if (hist_cur < 0)
600 return NULL;
601
602 if (hist_cur == hist_add_idx)
603 return NULL;
604
605 if (++hist_cur > hist_max)
606 hist_cur = 0;
607
608 if (hist_cur == hist_add_idx) {
609 ret = "";
610 } else
611 ret = hist_list[hist_cur];
612
613 return (ret);
614 }
615
616 #ifndef CONFIG_CMDLINE_EDITING
617 static void cread_print_hist_list(void)
618 {
619 int i;
620 unsigned long n;
621
622 n = hist_num - hist_max;
623
624 i = hist_add_idx + 1;
625 while (1) {
626 if (i > hist_max)
627 i = 0;
628 if (i == hist_add_idx)
629 break;
630 printf("%s\n", hist_list[i]);
631 n++;
632 i++;
633 }
634 }
635 #endif /* CONFIG_CMDLINE_EDITING */
636
637 #define BEGINNING_OF_LINE() { \
638 while (num) { \
639 getcmd_putch(CTL_BACKSPACE); \
640 num--; \
641 } \
642 }
643
644 #define ERASE_TO_EOL() { \
645 if (num < eol_num) { \
646 int tmp; \
647 for (tmp = num; tmp < eol_num; tmp++) \
648 getcmd_putch(' '); \
649 while (tmp-- > num) \
650 getcmd_putch(CTL_BACKSPACE); \
651 eol_num = num; \
652 } \
653 }
654
655 #define REFRESH_TO_EOL() { \
656 if (num < eol_num) { \
657 wlen = eol_num - num; \
658 putnstr(buf + num, wlen); \
659 num = eol_num; \
660 } \
661 }
662
663 static void cread_add_char(char ichar, int insert, unsigned long *num,
664 unsigned long *eol_num, char *buf, unsigned long len)
665 {
666 unsigned long wlen;
667
668 /* room ??? */
669 if (insert || *num == *eol_num) {
670 if (*eol_num > len - 1) {
671 getcmd_cbeep();
672 return;
673 }
674 (*eol_num)++;
675 }
676
677 if (insert) {
678 wlen = *eol_num - *num;
679 if (wlen > 1) {
680 memmove(&buf[*num+1], &buf[*num], wlen-1);
681 }
682
683 buf[*num] = ichar;
684 putnstr(buf + *num, wlen);
685 (*num)++;
686 while (--wlen) {
687 getcmd_putch(CTL_BACKSPACE);
688 }
689 } else {
690 /* echo the character */
691 wlen = 1;
692 buf[*num] = ichar;
693 putnstr(buf + *num, wlen);
694 (*num)++;
695 }
696 }
697
698 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
699 unsigned long *eol_num, char *buf, unsigned long len)
700 {
701 while (strsize--) {
702 cread_add_char(*str, insert, num, eol_num, buf, len);
703 str++;
704 }
705 }
706
707 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
708 {
709 unsigned long num = 0;
710 unsigned long eol_num = 0;
711 unsigned long wlen;
712 char ichar;
713 int insert = 1;
714 int esc_len = 0;
715 char esc_save[8];
716 int init_len = strlen(buf);
717
718 if (init_len)
719 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
720
721 while (1) {
722 #ifdef CONFIG_BOOT_RETRY_TIME
723 while (!tstc()) { /* while no incoming data */
724 if (retry_time >= 0 && get_ticks() > endtime)
725 return (-2); /* timed out */
726 WATCHDOG_RESET();
727 }
728 #endif
729
730 ichar = getcmd_getch();
731
732 if ((ichar == '\n') || (ichar == '\r')) {
733 putc('\n');
734 break;
735 }
736
737 /*
738 * handle standard linux xterm esc sequences for arrow key, etc.
739 */
740 if (esc_len != 0) {
741 if (esc_len == 1) {
742 if (ichar == '[') {
743 esc_save[esc_len] = ichar;
744 esc_len = 2;
745 } else {
746 cread_add_str(esc_save, esc_len, insert,
747 &num, &eol_num, buf, *len);
748 esc_len = 0;
749 }
750 continue;
751 }
752
753 switch (ichar) {
754
755 case 'D': /* <- key */
756 ichar = CTL_CH('b');
757 esc_len = 0;
758 break;
759 case 'C': /* -> key */
760 ichar = CTL_CH('f');
761 esc_len = 0;
762 break; /* pass off to ^F handler */
763 case 'H': /* Home key */
764 ichar = CTL_CH('a');
765 esc_len = 0;
766 break; /* pass off to ^A handler */
767 case 'A': /* up arrow */
768 ichar = CTL_CH('p');
769 esc_len = 0;
770 break; /* pass off to ^P handler */
771 case 'B': /* down arrow */
772 ichar = CTL_CH('n');
773 esc_len = 0;
774 break; /* pass off to ^N handler */
775 default:
776 esc_save[esc_len++] = ichar;
777 cread_add_str(esc_save, esc_len, insert,
778 &num, &eol_num, buf, *len);
779 esc_len = 0;
780 continue;
781 }
782 }
783
784 switch (ichar) {
785 case 0x1b:
786 if (esc_len == 0) {
787 esc_save[esc_len] = ichar;
788 esc_len = 1;
789 } else {
790 puts("impossible condition #876\n");
791 esc_len = 0;
792 }
793 break;
794
795 case CTL_CH('a'):
796 BEGINNING_OF_LINE();
797 break;
798 case CTL_CH('c'): /* ^C - break */
799 *buf = '\0'; /* discard input */
800 return (-1);
801 case CTL_CH('f'):
802 if (num < eol_num) {
803 getcmd_putch(buf[num]);
804 num++;
805 }
806 break;
807 case CTL_CH('b'):
808 if (num) {
809 getcmd_putch(CTL_BACKSPACE);
810 num--;
811 }
812 break;
813 case CTL_CH('d'):
814 if (num < eol_num) {
815 wlen = eol_num - num - 1;
816 if (wlen) {
817 memmove(&buf[num], &buf[num+1], wlen);
818 putnstr(buf + num, wlen);
819 }
820
821 getcmd_putch(' ');
822 do {
823 getcmd_putch(CTL_BACKSPACE);
824 } while (wlen--);
825 eol_num--;
826 }
827 break;
828 case CTL_CH('k'):
829 ERASE_TO_EOL();
830 break;
831 case CTL_CH('e'):
832 REFRESH_TO_EOL();
833 break;
834 case CTL_CH('o'):
835 insert = !insert;
836 break;
837 case CTL_CH('x'):
838 case CTL_CH('u'):
839 BEGINNING_OF_LINE();
840 ERASE_TO_EOL();
841 break;
842 case DEL:
843 case DEL7:
844 case 8:
845 if (num) {
846 wlen = eol_num - num;
847 num--;
848 memmove(&buf[num], &buf[num+1], wlen);
849 getcmd_putch(CTL_BACKSPACE);
850 putnstr(buf + num, wlen);
851 getcmd_putch(' ');
852 do {
853 getcmd_putch(CTL_BACKSPACE);
854 } while (wlen--);
855 eol_num--;
856 }
857 break;
858 case CTL_CH('p'):
859 case CTL_CH('n'):
860 {
861 char * hline;
862
863 esc_len = 0;
864
865 if (ichar == CTL_CH('p'))
866 hline = hist_prev();
867 else
868 hline = hist_next();
869
870 if (!hline) {
871 getcmd_cbeep();
872 continue;
873 }
874
875 /* nuke the current line */
876 /* first, go home */
877 BEGINNING_OF_LINE();
878
879 /* erase to end of line */
880 ERASE_TO_EOL();
881
882 /* copy new line into place and display */
883 strcpy(buf, hline);
884 eol_num = strlen(buf);
885 REFRESH_TO_EOL();
886 continue;
887 }
888 #ifdef CONFIG_AUTO_COMPLETE
889 case '\t': {
890 int num2, col;
891
892 /* do not autocomplete when in the middle */
893 if (num < eol_num) {
894 getcmd_cbeep();
895 break;
896 }
897
898 buf[num] = '\0';
899 col = strlen(prompt) + eol_num;
900 num2 = num;
901 if (cmd_auto_complete(prompt, buf, &num2, &col)) {
902 col = num2 - num;
903 num += col;
904 eol_num += col;
905 }
906 break;
907 }
908 #endif
909 default:
910 cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
911 break;
912 }
913 }
914 *len = eol_num;
915 buf[eol_num] = '\0'; /* lose the newline */
916
917 if (buf[0] && buf[0] != CREAD_HIST_CHAR)
918 cread_add_to_hist(buf);
919 hist_cur = hist_add_idx;
920
921 return 0;
922 }
923
924 #endif /* CONFIG_CMDLINE_EDITING */
925
926 /****************************************************************************/
927
928 /*
929 * Prompt for input and read a line.
930 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
931 * time out when time goes past endtime (timebase time in ticks).
932 * Return: number of read characters
933 * -1 if break
934 * -2 if timed out
935 */
936 int readline (const char *const prompt)
937 {
938 /*
939 * If console_buffer isn't 0-length the user will be prompted to modify
940 * it instead of entering it from scratch as desired.
941 */
942 console_buffer[0] = '\0';
943
944 return readline_into_buffer(prompt, console_buffer);
945 }
946
947
948 int readline_into_buffer (const char *const prompt, char * buffer)
949 {
950 char *p = buffer;
951 #ifdef CONFIG_CMDLINE_EDITING
952 unsigned int len=MAX_CMDBUF_SIZE;
953 int rc;
954 static int initted = 0;
955
956 /*
957 * History uses a global array which is not
958 * writable until after relocation to RAM.
959 * Revert to non-history version if still
960 * running from flash.
961 */
962 if (gd->flags & GD_FLG_RELOC) {
963 if (!initted) {
964 hist_init();
965 initted = 1;
966 }
967
968 if (prompt)
969 puts (prompt);
970
971 rc = cread_line(prompt, p, &len);
972 return rc < 0 ? rc : len;
973
974 } else {
975 #endif /* CONFIG_CMDLINE_EDITING */
976 char * p_buf = p;
977 int n = 0; /* buffer index */
978 int plen = 0; /* prompt length */
979 int col; /* output column cnt */
980 char c;
981
982 /* print prompt */
983 if (prompt) {
984 plen = strlen (prompt);
985 puts (prompt);
986 }
987 col = plen;
988
989 for (;;) {
990 #ifdef CONFIG_BOOT_RETRY_TIME
991 while (!tstc()) { /* while no incoming data */
992 if (retry_time >= 0 && get_ticks() > endtime)
993 return (-2); /* timed out */
994 WATCHDOG_RESET();
995 }
996 #endif
997 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
998
999 #ifdef CONFIG_SHOW_ACTIVITY
1000 while (!tstc()) {
1001 extern void show_activity(int arg);
1002 show_activity(0);
1003 WATCHDOG_RESET();
1004 }
1005 #endif
1006 c = getc();
1007
1008 /*
1009 * Special character handling
1010 */
1011 switch (c) {
1012 case '\r': /* Enter */
1013 case '\n':
1014 *p = '\0';
1015 puts ("\r\n");
1016 return (p - p_buf);
1017
1018 case '\0': /* nul */
1019 continue;
1020
1021 case 0x03: /* ^C - break */
1022 p_buf[0] = '\0'; /* discard input */
1023 return (-1);
1024
1025 case 0x15: /* ^U - erase line */
1026 while (col > plen) {
1027 puts (erase_seq);
1028 --col;
1029 }
1030 p = p_buf;
1031 n = 0;
1032 continue;
1033
1034 case 0x17: /* ^W - erase word */
1035 p=delete_char(p_buf, p, &col, &n, plen);
1036 while ((n > 0) && (*p != ' ')) {
1037 p=delete_char(p_buf, p, &col, &n, plen);
1038 }
1039 continue;
1040
1041 case 0x08: /* ^H - backspace */
1042 case 0x7F: /* DEL - backspace */
1043 p=delete_char(p_buf, p, &col, &n, plen);
1044 continue;
1045
1046 default:
1047 /*
1048 * Must be a normal character then
1049 */
1050 if (n < CONFIG_SYS_CBSIZE-2) {
1051 if (c == '\t') { /* expand TABs */
1052 #ifdef CONFIG_AUTO_COMPLETE
1053 /* if auto completion triggered just continue */
1054 *p = '\0';
1055 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1056 p = p_buf + n; /* reset */
1057 continue;
1058 }
1059 #endif
1060 puts (tab_seq+(col&07));
1061 col += 8 - (col&07);
1062 } else {
1063 ++col; /* echo input */
1064 putc (c);
1065 }
1066 *p++ = c;
1067 ++n;
1068 } else { /* Buffer full */
1069 putc ('\a');
1070 }
1071 }
1072 }
1073 #ifdef CONFIG_CMDLINE_EDITING
1074 }
1075 #endif
1076 }
1077
1078 /****************************************************************************/
1079
1080 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1081 {
1082 char *s;
1083
1084 if (*np == 0) {
1085 return (p);
1086 }
1087
1088 if (*(--p) == '\t') { /* will retype the whole line */
1089 while (*colp > plen) {
1090 puts (erase_seq);
1091 (*colp)--;
1092 }
1093 for (s=buffer; s<p; ++s) {
1094 if (*s == '\t') {
1095 puts (tab_seq+((*colp) & 07));
1096 *colp += 8 - ((*colp) & 07);
1097 } else {
1098 ++(*colp);
1099 putc (*s);
1100 }
1101 }
1102 } else {
1103 puts (erase_seq);
1104 (*colp)--;
1105 }
1106 (*np)--;
1107 return (p);
1108 }
1109
1110 /****************************************************************************/
1111
1112 int parse_line (char *line, char *argv[])
1113 {
1114 int nargs = 0;
1115
1116 #ifdef DEBUG_PARSER
1117 printf ("parse_line: \"%s\"\n", line);
1118 #endif
1119 while (nargs < CONFIG_SYS_MAXARGS) {
1120
1121 /* skip any white space */
1122 while ((*line == ' ') || (*line == '\t')) {
1123 ++line;
1124 }
1125
1126 if (*line == '\0') { /* end of line, no more args */
1127 argv[nargs] = NULL;
1128 #ifdef DEBUG_PARSER
1129 printf ("parse_line: nargs=%d\n", nargs);
1130 #endif
1131 return (nargs);
1132 }
1133
1134 argv[nargs++] = line; /* begin of argument string */
1135
1136 /* find end of string */
1137 while (*line && (*line != ' ') && (*line != '\t')) {
1138 ++line;
1139 }
1140
1141 if (*line == '\0') { /* end of line, no more args */
1142 argv[nargs] = NULL;
1143 #ifdef DEBUG_PARSER
1144 printf ("parse_line: nargs=%d\n", nargs);
1145 #endif
1146 return (nargs);
1147 }
1148
1149 *line++ = '\0'; /* terminate current arg */
1150 }
1151
1152 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1153
1154 #ifdef DEBUG_PARSER
1155 printf ("parse_line: nargs=%d\n", nargs);
1156 #endif
1157 return (nargs);
1158 }
1159
1160 /****************************************************************************/
1161
1162 static void process_macros (const char *input, char *output)
1163 {
1164 char c, prev;
1165 const char *varname_start = NULL;
1166 int inputcnt = strlen (input);
1167 int outputcnt = CONFIG_SYS_CBSIZE;
1168 int state = 0; /* 0 = waiting for '$' */
1169
1170 /* 1 = waiting for '(' or '{' */
1171 /* 2 = waiting for ')' or '}' */
1172 /* 3 = waiting for ''' */
1173 #ifdef DEBUG_PARSER
1174 char *output_start = output;
1175
1176 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1177 input);
1178 #endif
1179
1180 prev = '\0'; /* previous character */
1181
1182 while (inputcnt && outputcnt) {
1183 c = *input++;
1184 inputcnt--;
1185
1186 if (state != 3) {
1187 /* remove one level of escape characters */
1188 if ((c == '\\') && (prev != '\\')) {
1189 if (inputcnt-- == 0)
1190 break;
1191 prev = c;
1192 c = *input++;
1193 }
1194 }
1195
1196 switch (state) {
1197 case 0: /* Waiting for (unescaped) $ */
1198 if ((c == '\'') && (prev != '\\')) {
1199 state = 3;
1200 break;
1201 }
1202 if ((c == '$') && (prev != '\\')) {
1203 state++;
1204 } else {
1205 *(output++) = c;
1206 outputcnt--;
1207 }
1208 break;
1209 case 1: /* Waiting for ( */
1210 if (c == '(' || c == '{') {
1211 state++;
1212 varname_start = input;
1213 } else {
1214 state = 0;
1215 *(output++) = '$';
1216 outputcnt--;
1217
1218 if (outputcnt) {
1219 *(output++) = c;
1220 outputcnt--;
1221 }
1222 }
1223 break;
1224 case 2: /* Waiting for ) */
1225 if (c == ')' || c == '}') {
1226 int i;
1227 char envname[CONFIG_SYS_CBSIZE], *envval;
1228 int envcnt = input - varname_start - 1; /* Varname # of chars */
1229
1230 /* Get the varname */
1231 for (i = 0; i < envcnt; i++) {
1232 envname[i] = varname_start[i];
1233 }
1234 envname[i] = 0;
1235
1236 /* Get its value */
1237 envval = getenv (envname);
1238
1239 /* Copy into the line if it exists */
1240 if (envval != NULL)
1241 while ((*envval) && outputcnt) {
1242 *(output++) = *(envval++);
1243 outputcnt--;
1244 }
1245 /* Look for another '$' */
1246 state = 0;
1247 }
1248 break;
1249 case 3: /* Waiting for ' */
1250 if ((c == '\'') && (prev != '\\')) {
1251 state = 0;
1252 } else {
1253 *(output++) = c;
1254 outputcnt--;
1255 }
1256 break;
1257 }
1258 prev = c;
1259 }
1260
1261 if (outputcnt)
1262 *output = 0;
1263 else
1264 *(output - 1) = 0;
1265
1266 #ifdef DEBUG_PARSER
1267 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1268 strlen (output_start), output_start);
1269 #endif
1270 }
1271
1272 /****************************************************************************
1273 * returns:
1274 * 1 - command executed, repeatable
1275 * 0 - command executed but not repeatable, interrupted commands are
1276 * always considered not repeatable
1277 * -1 - not executed (unrecognized, bootd recursion or too many args)
1278 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1279 * considered unrecognized)
1280 *
1281 * WARNING:
1282 *
1283 * We must create a temporary copy of the command since the command we get
1284 * may be the result from getenv(), which returns a pointer directly to
1285 * the environment data, which may change magicly when the command we run
1286 * creates or modifies environment variables (like "bootp" does).
1287 */
1288
1289 int run_command (const char *cmd, int flag)
1290 {
1291 cmd_tbl_t *cmdtp;
1292 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */
1293 char *token; /* start of token in cmdbuf */
1294 char *sep; /* end of token (separator) in cmdbuf */
1295 char finaltoken[CONFIG_SYS_CBSIZE];
1296 char *str = cmdbuf;
1297 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
1298 int argc, inquotes;
1299 int repeatable = 1;
1300 int rc = 0;
1301
1302 #ifdef DEBUG_PARSER
1303 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1304 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */
1305 puts ("\"\n");
1306 #endif
1307
1308 clear_ctrlc(); /* forget any previous Control C */
1309
1310 if (!cmd || !*cmd) {
1311 return -1; /* empty command */
1312 }
1313
1314 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1315 puts ("## Command too long!\n");
1316 return -1;
1317 }
1318
1319 strcpy (cmdbuf, cmd);
1320
1321 /* Process separators and check for invalid
1322 * repeatable commands
1323 */
1324
1325 #ifdef DEBUG_PARSER
1326 printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1327 #endif
1328 while (*str) {
1329
1330 /*
1331 * Find separator, or string end
1332 * Allow simple escape of ';' by writing "\;"
1333 */
1334 for (inquotes = 0, sep = str; *sep; sep++) {
1335 if ((*sep=='\'') &&
1336 (*(sep-1) != '\\'))
1337 inquotes=!inquotes;
1338
1339 if (!inquotes &&
1340 (*sep == ';') && /* separator */
1341 ( sep != str) && /* past string start */
1342 (*(sep-1) != '\\')) /* and NOT escaped */
1343 break;
1344 }
1345
1346 /*
1347 * Limit the token to data between separators
1348 */
1349 token = str;
1350 if (*sep) {
1351 str = sep + 1; /* start of command for next pass */
1352 *sep = '\0';
1353 }
1354 else
1355 str = sep; /* no more commands for next pass */
1356 #ifdef DEBUG_PARSER
1357 printf ("token: \"%s\"\n", token);
1358 #endif
1359
1360 /* find macros in this token and replace them */
1361 process_macros (token, finaltoken);
1362
1363 /* Extract arguments */
1364 if ((argc = parse_line (finaltoken, argv)) == 0) {
1365 rc = -1; /* no command at all */
1366 continue;
1367 }
1368
1369 /* Look up command in command table */
1370 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1371 printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1372 rc = -1; /* give up after bad command */
1373 continue;
1374 }
1375
1376 /* found - check max args */
1377 if (argc > cmdtp->maxargs) {
1378 cmd_usage(cmdtp);
1379 rc = -1;
1380 continue;
1381 }
1382
1383 #if defined(CONFIG_CMD_BOOTD)
1384 /* avoid "bootd" recursion */
1385 if (cmdtp->cmd == do_bootd) {
1386 #ifdef DEBUG_PARSER
1387 printf ("[%s]\n", finaltoken);
1388 #endif
1389 if (flag & CMD_FLAG_BOOTD) {
1390 puts ("'bootd' recursion detected\n");
1391 rc = -1;
1392 continue;
1393 } else {
1394 flag |= CMD_FLAG_BOOTD;
1395 }
1396 }
1397 #endif
1398
1399 /* OK - call function to do the command */
1400 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1401 rc = -1;
1402 }
1403
1404 repeatable &= cmdtp->repeatable;
1405
1406 /* Did the user stop this? */
1407 if (had_ctrlc ())
1408 return -1; /* if stopped then not repeatable */
1409 }
1410
1411 return rc ? rc : repeatable;
1412 }
1413
1414 /****************************************************************************/
1415
1416 #if defined(CONFIG_CMD_RUN)
1417 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1418 {
1419 int i;
1420
1421 if (argc < 2)
1422 return cmd_usage(cmdtp);
1423
1424 for (i=1; i<argc; ++i) {
1425 char *arg;
1426
1427 if ((arg = getenv (argv[i])) == NULL) {
1428 printf ("## Error: \"%s\" not defined\n", argv[i]);
1429 return 1;
1430 }
1431 #ifndef CONFIG_SYS_HUSH_PARSER
1432 if (run_command (arg, flag) == -1)
1433 return 1;
1434 #else
1435 if (parse_string_outer(arg,
1436 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
1437 return 1;
1438 #endif
1439 }
1440 return 0;
1441 }
1442 #endif
"Das U-Boot" Source Tree