The patch introduces the CRITICAL feature of POST tests. If the test marked as POST_C...
[platform/kernel/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