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 */
28 /* #define DEBUG */
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
37 #ifdef CONFIG_SYS_HUSH_PARSER
38 #include <hush.h>
39 #endif
41 #include <post.h>
43 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
44 DECLARE_GLOBAL_DATA_PTR;
45 #endif
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")));
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
57 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
59 #if defined(CONFIG_UPDATE_TFTP)
60 void update_tftp (void);
61 #endif /* CONFIG_UPDATE_TFTP */
63 #define MAX_DELAY_STOP_STR 32
65 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
66 static int abortboot(int);
67 #endif
69 #undef DEBUG_PARSER
71 char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */
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 */
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
82 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
84 #ifndef CONFIG_BOOT_RETRY_MIN
85 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
86 #endif
88 #ifdef CONFIG_MODEM_SUPPORT
89 int do_mdm_init = 0;
90 extern void mdm_init(void); /* defined in board.c */
91 #endif
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 };
116 char presskey [MAX_DELAY_STOP_STR];
117 u_int presskey_len = 0;
118 u_int presskey_max = 0;
119 u_int i;
121 # ifdef CONFIG_AUTOBOOT_PROMPT
122 printf(CONFIG_AUTOBOOT_PROMPT);
123 # endif
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
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;
148 presskey_max = presskey_max > delaykey[i].len ?
149 presskey_max : delaykey[i].len;
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 }
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];
170 presskey [i] = getc();
171 }
172 }
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
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);
195 # if DEBUG_BOOTKEYS
196 if (!abort)
197 puts("key timeout\n");
198 # endif
200 #ifdef CONFIG_SILENT_CONSOLE
201 if (abort)
202 gd->flags &= ~GD_FLG_SILENT;
203 #endif
205 return abort;
206 }
208 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */
210 #ifdef CONFIG_MENUKEY
211 static int menukey = 0;
212 #endif
214 static __inline__ int abortboot(int bootdelay)
215 {
216 int abort = 0;
218 #ifdef CONFIG_MENUPROMPT
219 printf(CONFIG_MENUPROMPT);
220 #else
221 printf("Hit any key to stop autoboot: %2d ", bootdelay);
222 #endif
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
238 while ((bootdelay > 0) && (!abort)) {
239 int i;
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 }
257 printf("\b\b\b%2d ", bootdelay);
258 }
260 putc('\n');
262 #ifdef CONFIG_SILENT_CONSOLE
263 if (abort)
264 gd->flags &= ~GD_FLG_SILENT;
265 #endif
267 return abort;
268 }
269 # endif /* CONFIG_AUTOBOOT_KEYED */
270 #endif /* CONFIG_BOOTDELAY >= 0 */
272 /****************************************************************************/
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
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 */
297 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
298 ulong bmp = 0; /* default bitmap */
299 extern int trab_vfd (ulong bitmap);
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 */
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 */
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 */
329 #ifdef CONFIG_VERSION_VARIABLE
330 {
331 extern char version_string[];
333 setenv ("ver", version_string); /* set version variable */
334 }
335 #endif /* CONFIG_VERSION_VARIABLE */
337 #ifdef CONFIG_SYS_HUSH_PARSER
338 u_boot_hush_start ();
339 #endif
341 #if defined(CONFIG_HUSH_INIT_VAR)
342 hush_init_var ();
343 #endif
345 #ifdef CONFIG_AUTO_COMPLETE
346 install_auto_complete();
347 #endif
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
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
362 # ifdef CONFIG_AUTOBOOT_KEYED
363 disable_ctrlc(prev); /* restore Control C checking */
364 # endif
365 }
366 #endif /* CONFIG_PREBOOT */
368 #if defined(CONFIG_UPDATE_TFTP)
369 update_tftp ();
370 #endif /* CONFIG_UPDATE_TFTP */
372 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
373 s = getenv ("bootdelay");
374 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
376 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
378 # ifdef CONFIG_BOOT_RETRY_TIME
379 init_cmd_timeout ();
380 # endif /* CONFIG_BOOT_RETRY_TIME */
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");
398 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
400 if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
401 # ifdef CONFIG_AUTOBOOT_KEYED
402 int prev = disable_ctrlc(1); /* disable Control C checking */
403 # endif
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
412 # ifdef CONFIG_AUTOBOOT_KEYED
413 disable_ctrlc(prev); /* restore Control C checking */
414 # endif
415 }
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 */
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);
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
470 if (len == -1)
471 puts ("<INTERRUPT>\n");
472 else
473 rc = run_command (lastcommand, flag);
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 }
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");
491 if (s != NULL)
492 retry_time = (int)simple_strtol(s, NULL, 10);
493 else
494 retry_time = CONFIG_BOOT_RETRY_TIME;
496 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
497 retry_time = CONFIG_BOOT_RETRY_MIN;
498 }
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
509 #ifdef CONFIG_CMDLINE_EDITING
511 /*
512 * cmdline-editing related codes from vivi.
513 * Author: Janghoon Lyu <nandy@mizi.com>
514 */
516 #define putnstr(str,n) do { \
517 printf ("%.*s", (int)n, str); \
518 } while (0)
520 #define CTL_CH(c) ((c) - 'a' + 1)
522 #define MAX_CMDBUF_SIZE CONFIG_SYS_CBSIZE
524 #define CTL_BACKSPACE ('\b')
525 #define DEL ((char)255)
526 #define DEL7 ((char)127)
527 #define CREAD_HIST_CHAR ('!')
529 #define getcmd_putch(ch) putc(ch)
530 #define getcmd_getch() getc()
531 #define getcmd_cbeep() getcmd_putch('\a')
533 #define HIST_MAX 20
534 #define HIST_SIZE MAX_CMDBUF_SIZE
536 static int hist_max = 0;
537 static int hist_add_idx = 0;
538 static int hist_cur = -1;
539 unsigned hist_num = 0;
541 char* hist_list[HIST_MAX];
542 char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */
544 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
546 static void hist_init(void)
547 {
548 int i;
550 hist_max = 0;
551 hist_add_idx = 0;
552 hist_cur = -1;
553 hist_num = 0;
555 for (i = 0; i < HIST_MAX; i++) {
556 hist_list[i] = hist_lines[i];
557 hist_list[i][0] = '\0';
558 }
559 }
561 static void cread_add_to_hist(char *line)
562 {
563 strcpy(hist_list[hist_add_idx], line);
565 if (++hist_add_idx >= HIST_MAX)
566 hist_add_idx = 0;
568 if (hist_add_idx > hist_max)
569 hist_max = hist_add_idx;
571 hist_num++;
572 }
574 static char* hist_prev(void)
575 {
576 char *ret;
577 int old_cur;
579 if (hist_cur < 0)
580 return NULL;
582 old_cur = hist_cur;
583 if (--hist_cur < 0)
584 hist_cur = hist_max;
586 if (hist_cur == hist_add_idx) {
587 hist_cur = old_cur;
588 ret = NULL;
589 } else
590 ret = hist_list[hist_cur];
592 return (ret);
593 }
595 static char* hist_next(void)
596 {
597 char *ret;
599 if (hist_cur < 0)
600 return NULL;
602 if (hist_cur == hist_add_idx)
603 return NULL;
605 if (++hist_cur > hist_max)
606 hist_cur = 0;
608 if (hist_cur == hist_add_idx) {
609 ret = "";
610 } else
611 ret = hist_list[hist_cur];
613 return (ret);
614 }
616 #ifndef CONFIG_CMDLINE_EDITING
617 static void cread_print_hist_list(void)
618 {
619 int i;
620 unsigned long n;
622 n = hist_num - hist_max;
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 */
637 #define BEGINNING_OF_LINE() { \
638 while (num) { \
639 getcmd_putch(CTL_BACKSPACE); \
640 num--; \
641 } \
642 }
644 #define ERASE_TO_EOL() { \
645 if (num < eol_num) { \
646 printf("%*s", (int)(eol_num - num), ""); \
647 do { \
648 getcmd_putch(CTL_BACKSPACE); \
649 } while (--eol_num > num); \
650 } \
651 }
653 #define REFRESH_TO_EOL() { \
654 if (num < eol_num) { \
655 wlen = eol_num - num; \
656 putnstr(buf + num, wlen); \
657 num = eol_num; \
658 } \
659 }
661 static void cread_add_char(char ichar, int insert, unsigned long *num,
662 unsigned long *eol_num, char *buf, unsigned long len)
663 {
664 unsigned long wlen;
666 /* room ??? */
667 if (insert || *num == *eol_num) {
668 if (*eol_num > len - 1) {
669 getcmd_cbeep();
670 return;
671 }
672 (*eol_num)++;
673 }
675 if (insert) {
676 wlen = *eol_num - *num;
677 if (wlen > 1) {
678 memmove(&buf[*num+1], &buf[*num], wlen-1);
679 }
681 buf[*num] = ichar;
682 putnstr(buf + *num, wlen);
683 (*num)++;
684 while (--wlen) {
685 getcmd_putch(CTL_BACKSPACE);
686 }
687 } else {
688 /* echo the character */
689 wlen = 1;
690 buf[*num] = ichar;
691 putnstr(buf + *num, wlen);
692 (*num)++;
693 }
694 }
696 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
697 unsigned long *eol_num, char *buf, unsigned long len)
698 {
699 while (strsize--) {
700 cread_add_char(*str, insert, num, eol_num, buf, len);
701 str++;
702 }
703 }
705 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
706 {
707 unsigned long num = 0;
708 unsigned long eol_num = 0;
709 unsigned long wlen;
710 char ichar;
711 int insert = 1;
712 int esc_len = 0;
713 char esc_save[8];
714 int init_len = strlen(buf);
716 if (init_len)
717 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
719 while (1) {
720 #ifdef CONFIG_BOOT_RETRY_TIME
721 while (!tstc()) { /* while no incoming data */
722 if (retry_time >= 0 && get_ticks() > endtime)
723 return (-2); /* timed out */
724 WATCHDOG_RESET();
725 }
726 #endif
728 ichar = getcmd_getch();
730 if ((ichar == '\n') || (ichar == '\r')) {
731 putc('\n');
732 break;
733 }
735 /*
736 * handle standard linux xterm esc sequences for arrow key, etc.
737 */
738 if (esc_len != 0) {
739 if (esc_len == 1) {
740 if (ichar == '[') {
741 esc_save[esc_len] = ichar;
742 esc_len = 2;
743 } else {
744 cread_add_str(esc_save, esc_len, insert,
745 &num, &eol_num, buf, *len);
746 esc_len = 0;
747 }
748 continue;
749 }
751 switch (ichar) {
753 case 'D': /* <- key */
754 ichar = CTL_CH('b');
755 esc_len = 0;
756 break;
757 case 'C': /* -> key */
758 ichar = CTL_CH('f');
759 esc_len = 0;
760 break; /* pass off to ^F handler */
761 case 'H': /* Home key */
762 ichar = CTL_CH('a');
763 esc_len = 0;
764 break; /* pass off to ^A handler */
765 case 'A': /* up arrow */
766 ichar = CTL_CH('p');
767 esc_len = 0;
768 break; /* pass off to ^P handler */
769 case 'B': /* down arrow */
770 ichar = CTL_CH('n');
771 esc_len = 0;
772 break; /* pass off to ^N handler */
773 default:
774 esc_save[esc_len++] = ichar;
775 cread_add_str(esc_save, esc_len, insert,
776 &num, &eol_num, buf, *len);
777 esc_len = 0;
778 continue;
779 }
780 }
782 switch (ichar) {
783 case 0x1b:
784 if (esc_len == 0) {
785 esc_save[esc_len] = ichar;
786 esc_len = 1;
787 } else {
788 puts("impossible condition #876\n");
789 esc_len = 0;
790 }
791 break;
793 case CTL_CH('a'):
794 BEGINNING_OF_LINE();
795 break;
796 case CTL_CH('c'): /* ^C - break */
797 *buf = '\0'; /* discard input */
798 return (-1);
799 case CTL_CH('f'):
800 if (num < eol_num) {
801 getcmd_putch(buf[num]);
802 num++;
803 }
804 break;
805 case CTL_CH('b'):
806 if (num) {
807 getcmd_putch(CTL_BACKSPACE);
808 num--;
809 }
810 break;
811 case CTL_CH('d'):
812 if (num < eol_num) {
813 wlen = eol_num - num - 1;
814 if (wlen) {
815 memmove(&buf[num], &buf[num+1], wlen);
816 putnstr(buf + num, wlen);
817 }
819 getcmd_putch(' ');
820 do {
821 getcmd_putch(CTL_BACKSPACE);
822 } while (wlen--);
823 eol_num--;
824 }
825 break;
826 case CTL_CH('k'):
827 ERASE_TO_EOL();
828 break;
829 case CTL_CH('e'):
830 REFRESH_TO_EOL();
831 break;
832 case CTL_CH('o'):
833 insert = !insert;
834 break;
835 case CTL_CH('x'):
836 case CTL_CH('u'):
837 BEGINNING_OF_LINE();
838 ERASE_TO_EOL();
839 break;
840 case DEL:
841 case DEL7:
842 case 8:
843 if (num) {
844 wlen = eol_num - num;
845 num--;
846 memmove(&buf[num], &buf[num+1], wlen);
847 getcmd_putch(CTL_BACKSPACE);
848 putnstr(buf + num, wlen);
849 getcmd_putch(' ');
850 do {
851 getcmd_putch(CTL_BACKSPACE);
852 } while (wlen--);
853 eol_num--;
854 }
855 break;
856 case CTL_CH('p'):
857 case CTL_CH('n'):
858 {
859 char * hline;
861 esc_len = 0;
863 if (ichar == CTL_CH('p'))
864 hline = hist_prev();
865 else
866 hline = hist_next();
868 if (!hline) {
869 getcmd_cbeep();
870 continue;
871 }
873 /* nuke the current line */
874 /* first, go home */
875 BEGINNING_OF_LINE();
877 /* erase to end of line */
878 ERASE_TO_EOL();
880 /* copy new line into place and display */
881 strcpy(buf, hline);
882 eol_num = strlen(buf);
883 REFRESH_TO_EOL();
884 continue;
885 }
886 #ifdef CONFIG_AUTO_COMPLETE
887 case '\t': {
888 int num2, col;
890 /* do not autocomplete when in the middle */
891 if (num < eol_num) {
892 getcmd_cbeep();
893 break;
894 }
896 buf[num] = '\0';
897 col = strlen(prompt) + eol_num;
898 num2 = num;
899 if (cmd_auto_complete(prompt, buf, &num2, &col)) {
900 col = num2 - num;
901 num += col;
902 eol_num += col;
903 }
904 break;
905 }
906 #endif
907 default:
908 cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
909 break;
910 }
911 }
912 *len = eol_num;
913 buf[eol_num] = '\0'; /* lose the newline */
915 if (buf[0] && buf[0] != CREAD_HIST_CHAR)
916 cread_add_to_hist(buf);
917 hist_cur = hist_add_idx;
919 return 0;
920 }
922 #endif /* CONFIG_CMDLINE_EDITING */
924 /****************************************************************************/
926 /*
927 * Prompt for input and read a line.
928 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
929 * time out when time goes past endtime (timebase time in ticks).
930 * Return: number of read characters
931 * -1 if break
932 * -2 if timed out
933 */
934 int readline (const char *const prompt)
935 {
936 /*
937 * If console_buffer isn't 0-length the user will be prompted to modify
938 * it instead of entering it from scratch as desired.
939 */
940 console_buffer[0] = '\0';
942 return readline_into_buffer(prompt, console_buffer);
943 }
946 int readline_into_buffer (const char *const prompt, char * buffer)
947 {
948 char *p = buffer;
949 #ifdef CONFIG_CMDLINE_EDITING
950 unsigned int len=MAX_CMDBUF_SIZE;
951 int rc;
952 static int initted = 0;
954 /*
955 * History uses a global array which is not
956 * writable until after relocation to RAM.
957 * Revert to non-history version if still
958 * running from flash.
959 */
960 if (gd->flags & GD_FLG_RELOC) {
961 if (!initted) {
962 hist_init();
963 initted = 1;
964 }
966 if (prompt)
967 puts (prompt);
969 rc = cread_line(prompt, p, &len);
970 return rc < 0 ? rc : len;
972 } else {
973 #endif /* CONFIG_CMDLINE_EDITING */
974 char * p_buf = p;
975 int n = 0; /* buffer index */
976 int plen = 0; /* prompt length */
977 int col; /* output column cnt */
978 char c;
980 /* print prompt */
981 if (prompt) {
982 plen = strlen (prompt);
983 puts (prompt);
984 }
985 col = plen;
987 for (;;) {
988 #ifdef CONFIG_BOOT_RETRY_TIME
989 while (!tstc()) { /* while no incoming data */
990 if (retry_time >= 0 && get_ticks() > endtime)
991 return (-2); /* timed out */
992 WATCHDOG_RESET();
993 }
994 #endif
995 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
997 #ifdef CONFIG_SHOW_ACTIVITY
998 while (!tstc()) {
999 extern void show_activity(int arg);
1000 show_activity(0);
1001 WATCHDOG_RESET();
1002 }
1003 #endif
1004 c = getc();
1006 /*
1007 * Special character handling
1008 */
1009 switch (c) {
1010 case '\r': /* Enter */
1011 case '\n':
1012 *p = '\0';
1013 puts ("\r\n");
1014 return (p - p_buf);
1016 case '\0': /* nul */
1017 continue;
1019 case 0x03: /* ^C - break */
1020 p_buf[0] = '\0'; /* discard input */
1021 return (-1);
1023 case 0x15: /* ^U - erase line */
1024 while (col > plen) {
1025 puts (erase_seq);
1026 --col;
1027 }
1028 p = p_buf;
1029 n = 0;
1030 continue;
1032 case 0x17: /* ^W - erase word */
1033 p=delete_char(p_buf, p, &col, &n, plen);
1034 while ((n > 0) && (*p != ' ')) {
1035 p=delete_char(p_buf, p, &col, &n, plen);
1036 }
1037 continue;
1039 case 0x08: /* ^H - backspace */
1040 case 0x7F: /* DEL - backspace */
1041 p=delete_char(p_buf, p, &col, &n, plen);
1042 continue;
1044 default:
1045 /*
1046 * Must be a normal character then
1047 */
1048 if (n < CONFIG_SYS_CBSIZE-2) {
1049 if (c == '\t') { /* expand TABs */
1050 #ifdef CONFIG_AUTO_COMPLETE
1051 /* if auto completion triggered just continue */
1052 *p = '\0';
1053 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1054 p = p_buf + n; /* reset */
1055 continue;
1056 }
1057 #endif
1058 puts (tab_seq+(col&07));
1059 col += 8 - (col&07);
1060 } else {
1061 ++col; /* echo input */
1062 putc (c);
1063 }
1064 *p++ = c;
1065 ++n;
1066 } else { /* Buffer full */
1067 putc ('\a');
1068 }
1069 }
1070 }
1071 #ifdef CONFIG_CMDLINE_EDITING
1072 }
1073 #endif
1074 }
1076 /****************************************************************************/
1078 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1079 {
1080 char *s;
1082 if (*np == 0) {
1083 return (p);
1084 }
1086 if (*(--p) == '\t') { /* will retype the whole line */
1087 while (*colp > plen) {
1088 puts (erase_seq);
1089 (*colp)--;
1090 }
1091 for (s=buffer; s<p; ++s) {
1092 if (*s == '\t') {
1093 puts (tab_seq+((*colp) & 07));
1094 *colp += 8 - ((*colp) & 07);
1095 } else {
1096 ++(*colp);
1097 putc (*s);
1098 }
1099 }
1100 } else {
1101 puts (erase_seq);
1102 (*colp)--;
1103 }
1104 (*np)--;
1105 return (p);
1106 }
1108 /****************************************************************************/
1110 int parse_line (char *line, char *argv[])
1111 {
1112 int nargs = 0;
1114 #ifdef DEBUG_PARSER
1115 printf ("parse_line: \"%s\"\n", line);
1116 #endif
1117 while (nargs < CONFIG_SYS_MAXARGS) {
1119 /* skip any white space */
1120 while ((*line == ' ') || (*line == '\t')) {
1121 ++line;
1122 }
1124 if (*line == '\0') { /* end of line, no more args */
1125 argv[nargs] = NULL;
1126 #ifdef DEBUG_PARSER
1127 printf ("parse_line: nargs=%d\n", nargs);
1128 #endif
1129 return (nargs);
1130 }
1132 argv[nargs++] = line; /* begin of argument string */
1134 /* find end of string */
1135 while (*line && (*line != ' ') && (*line != '\t')) {
1136 ++line;
1137 }
1139 if (*line == '\0') { /* end of line, no more args */
1140 argv[nargs] = NULL;
1141 #ifdef DEBUG_PARSER
1142 printf ("parse_line: nargs=%d\n", nargs);
1143 #endif
1144 return (nargs);
1145 }
1147 *line++ = '\0'; /* terminate current arg */
1148 }
1150 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1152 #ifdef DEBUG_PARSER
1153 printf ("parse_line: nargs=%d\n", nargs);
1154 #endif
1155 return (nargs);
1156 }
1158 /****************************************************************************/
1160 static void process_macros (const char *input, char *output)
1161 {
1162 char c, prev;
1163 const char *varname_start = NULL;
1164 int inputcnt = strlen (input);
1165 int outputcnt = CONFIG_SYS_CBSIZE;
1166 int state = 0; /* 0 = waiting for '$' */
1168 /* 1 = waiting for '(' or '{' */
1169 /* 2 = waiting for ')' or '}' */
1170 /* 3 = waiting for ''' */
1171 #ifdef DEBUG_PARSER
1172 char *output_start = output;
1174 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1175 input);
1176 #endif
1178 prev = '\0'; /* previous character */
1180 while (inputcnt && outputcnt) {
1181 c = *input++;
1182 inputcnt--;
1184 if (state != 3) {
1185 /* remove one level of escape characters */
1186 if ((c == '\\') && (prev != '\\')) {
1187 if (inputcnt-- == 0)
1188 break;
1189 prev = c;
1190 c = *input++;
1191 }
1192 }
1194 switch (state) {
1195 case 0: /* Waiting for (unescaped) $ */
1196 if ((c == '\'') && (prev != '\\')) {
1197 state = 3;
1198 break;
1199 }
1200 if ((c == '$') && (prev != '\\')) {
1201 state++;
1202 } else {
1203 *(output++) = c;
1204 outputcnt--;
1205 }
1206 break;
1207 case 1: /* Waiting for ( */
1208 if (c == '(' || c == '{') {
1209 state++;
1210 varname_start = input;
1211 } else {
1212 state = 0;
1213 *(output++) = '$';
1214 outputcnt--;
1216 if (outputcnt) {
1217 *(output++) = c;
1218 outputcnt--;
1219 }
1220 }
1221 break;
1222 case 2: /* Waiting for ) */
1223 if (c == ')' || c == '}') {
1224 int i;
1225 char envname[CONFIG_SYS_CBSIZE], *envval;
1226 int envcnt = input - varname_start - 1; /* Varname # of chars */
1228 /* Get the varname */
1229 for (i = 0; i < envcnt; i++) {
1230 envname[i] = varname_start[i];
1231 }
1232 envname[i] = 0;
1234 /* Get its value */
1235 envval = getenv (envname);
1237 /* Copy into the line if it exists */
1238 if (envval != NULL)
1239 while ((*envval) && outputcnt) {
1240 *(output++) = *(envval++);
1241 outputcnt--;
1242 }
1243 /* Look for another '$' */
1244 state = 0;
1245 }
1246 break;
1247 case 3: /* Waiting for ' */
1248 if ((c == '\'') && (prev != '\\')) {
1249 state = 0;
1250 } else {
1251 *(output++) = c;
1252 outputcnt--;
1253 }
1254 break;
1255 }
1256 prev = c;
1257 }
1259 if (outputcnt)
1260 *output = 0;
1261 else
1262 *(output - 1) = 0;
1264 #ifdef DEBUG_PARSER
1265 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1266 strlen (output_start), output_start);
1267 #endif
1268 }
1270 /****************************************************************************
1271 * returns:
1272 * 1 - command executed, repeatable
1273 * 0 - command executed but not repeatable, interrupted commands are
1274 * always considered not repeatable
1275 * -1 - not executed (unrecognized, bootd recursion or too many args)
1276 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1277 * considered unrecognized)
1278 *
1279 * WARNING:
1280 *
1281 * We must create a temporary copy of the command since the command we get
1282 * may be the result from getenv(), which returns a pointer directly to
1283 * the environment data, which may change magicly when the command we run
1284 * creates or modifies environment variables (like "bootp" does).
1285 */
1287 int run_command (const char *cmd, int flag)
1288 {
1289 cmd_tbl_t *cmdtp;
1290 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */
1291 char *token; /* start of token in cmdbuf */
1292 char *sep; /* end of token (separator) in cmdbuf */
1293 char finaltoken[CONFIG_SYS_CBSIZE];
1294 char *str = cmdbuf;
1295 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
1296 int argc, inquotes;
1297 int repeatable = 1;
1298 int rc = 0;
1300 #ifdef DEBUG_PARSER
1301 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1302 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */
1303 puts ("\"\n");
1304 #endif
1306 clear_ctrlc(); /* forget any previous Control C */
1308 if (!cmd || !*cmd) {
1309 return -1; /* empty command */
1310 }
1312 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1313 puts ("## Command too long!\n");
1314 return -1;
1315 }
1317 strcpy (cmdbuf, cmd);
1319 /* Process separators and check for invalid
1320 * repeatable commands
1321 */
1323 #ifdef DEBUG_PARSER
1324 printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1325 #endif
1326 while (*str) {
1328 /*
1329 * Find separator, or string end
1330 * Allow simple escape of ';' by writing "\;"
1331 */
1332 for (inquotes = 0, sep = str; *sep; sep++) {
1333 if ((*sep=='\'') &&
1334 (*(sep-1) != '\\'))
1335 inquotes=!inquotes;
1337 if (!inquotes &&
1338 (*sep == ';') && /* separator */
1339 ( sep != str) && /* past string start */
1340 (*(sep-1) != '\\')) /* and NOT escaped */
1341 break;
1342 }
1344 /*
1345 * Limit the token to data between separators
1346 */
1347 token = str;
1348 if (*sep) {
1349 str = sep + 1; /* start of command for next pass */
1350 *sep = '\0';
1351 }
1352 else
1353 str = sep; /* no more commands for next pass */
1354 #ifdef DEBUG_PARSER
1355 printf ("token: \"%s\"\n", token);
1356 #endif
1358 /* find macros in this token and replace them */
1359 process_macros (token, finaltoken);
1361 /* Extract arguments */
1362 if ((argc = parse_line (finaltoken, argv)) == 0) {
1363 rc = -1; /* no command at all */
1364 continue;
1365 }
1367 /* Look up command in command table */
1368 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1369 printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1370 rc = -1; /* give up after bad command */
1371 continue;
1372 }
1374 /* found - check max args */
1375 if (argc > cmdtp->maxargs) {
1376 cmd_usage(cmdtp);
1377 rc = -1;
1378 continue;
1379 }
1381 #if defined(CONFIG_CMD_BOOTD)
1382 /* avoid "bootd" recursion */
1383 if (cmdtp->cmd == do_bootd) {
1384 #ifdef DEBUG_PARSER
1385 printf ("[%s]\n", finaltoken);
1386 #endif
1387 if (flag & CMD_FLAG_BOOTD) {
1388 puts ("'bootd' recursion detected\n");
1389 rc = -1;
1390 continue;
1391 } else {
1392 flag |= CMD_FLAG_BOOTD;
1393 }
1394 }
1395 #endif
1397 /* OK - call function to do the command */
1398 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1399 rc = -1;
1400 }
1402 repeatable &= cmdtp->repeatable;
1404 /* Did the user stop this? */
1405 if (had_ctrlc ())
1406 return -1; /* if stopped then not repeatable */
1407 }
1409 return rc ? rc : repeatable;
1410 }
1412 /****************************************************************************/
1414 #if defined(CONFIG_CMD_RUN)
1415 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1416 {
1417 int i;
1419 if (argc < 2)
1420 return cmd_usage(cmdtp);
1422 for (i=1; i<argc; ++i) {
1423 char *arg;
1425 if ((arg = getenv (argv[i])) == NULL) {
1426 printf ("## Error: \"%s\" not defined\n", argv[i]);
1427 return 1;
1428 }
1429 #ifndef CONFIG_SYS_HUSH_PARSER
1430 if (run_command (arg, flag) == -1)
1431 return 1;
1432 #else
1433 if (parse_string_outer(arg,
1434 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
1435 return 1;
1436 #endif
1437 }
1438 return 0;
1439 }
1440 #endif