Merge branch 'master' of git://git.denx.de/u-boot-usb
[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  * SPDX-License-Identifier:     GPL-2.0+
10  */
11
12 /* #define      DEBUG   */
13
14 #include <common.h>
15 #include <command.h>
16 #include <fdtdec.h>
17 #include <hush.h>
18 #include <malloc.h>
19 #include <menu.h>
20 #include <post.h>
21 #include <version.h>
22 #include <watchdog.h>
23 #include <linux/ctype.h>
24
25 DECLARE_GLOBAL_DATA_PTR;
26
27 /*
28  * Board-specific Platform code can reimplement show_boot_progress () if needed
29  */
30 void inline __show_boot_progress (int val) {}
31 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
32
33 #define MAX_DELAY_STOP_STR 32
34
35 #define DEBUG_PARSER    0       /* set to 1 to debug */
36
37 #define debug_parser(fmt, args...)              \
38         debug_cond(DEBUG_PARSER, fmt, ##args)
39
40 #ifndef DEBUG_BOOTKEYS
41 #define DEBUG_BOOTKEYS 0
42 #endif
43 #define debug_bootkeys(fmt, args...)            \
44         debug_cond(DEBUG_BOOTKEYS, fmt, ##args)
45
46 char        console_buffer[CONFIG_SYS_CBSIZE + 1];      /* console I/O buffer   */
47
48 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
49 static const char erase_seq[] = "\b \b";                /* erase sequence       */
50 static const char   tab_seq[] = "        ";             /* used to expand TABs  */
51
52 #ifdef CONFIG_BOOT_RETRY_TIME
53 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
54 static int      retry_time = -1; /* -1 so can call readline before main_loop */
55 #endif
56
57 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
58
59 #ifndef CONFIG_BOOT_RETRY_MIN
60 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
61 #endif
62
63 #ifdef CONFIG_MODEM_SUPPORT
64 int do_mdm_init = 0;
65 extern void mdm_init(void); /* defined in board.c */
66 #endif
67
68 /***************************************************************************
69  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
70  * returns: 0 -  no key string, allow autoboot 1 - got key string, abort
71  */
72 #if defined(CONFIG_BOOTDELAY)
73 # if defined(CONFIG_AUTOBOOT_KEYED)
74 static int abortboot_keyed(int bootdelay)
75 {
76         int abort = 0;
77         uint64_t etime = endtick(bootdelay);
78         struct {
79                 char* str;
80                 u_int len;
81                 int retry;
82         }
83         delaykey [] = {
84                 { str: getenv ("bootdelaykey"),  retry: 1 },
85                 { str: getenv ("bootdelaykey2"), retry: 1 },
86                 { str: getenv ("bootstopkey"),   retry: 0 },
87                 { str: getenv ("bootstopkey2"),  retry: 0 },
88         };
89
90         char presskey [MAX_DELAY_STOP_STR];
91         u_int presskey_len = 0;
92         u_int presskey_max = 0;
93         u_int i;
94
95 #ifndef CONFIG_ZERO_BOOTDELAY_CHECK
96         if (bootdelay == 0)
97                 return 0;
98 #endif
99
100 #  ifdef CONFIG_AUTOBOOT_PROMPT
101         printf(CONFIG_AUTOBOOT_PROMPT);
102 #  endif
103
104 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
105         if (delaykey[0].str == NULL)
106                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
107 #  endif
108 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
109         if (delaykey[1].str == NULL)
110                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
111 #  endif
112 #  ifdef CONFIG_AUTOBOOT_STOP_STR
113         if (delaykey[2].str == NULL)
114                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
115 #  endif
116 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
117         if (delaykey[3].str == NULL)
118                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
119 #  endif
120
121         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
122                 delaykey[i].len = delaykey[i].str == NULL ?
123                                     0 : strlen (delaykey[i].str);
124                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
125                                     MAX_DELAY_STOP_STR : delaykey[i].len;
126
127                 presskey_max = presskey_max > delaykey[i].len ?
128                                     presskey_max : delaykey[i].len;
129
130                 debug_bootkeys("%s key:<%s>\n",
131                                delaykey[i].retry ? "delay" : "stop",
132                                delaykey[i].str ? delaykey[i].str : "NULL");
133         }
134
135         /* In order to keep up with incoming data, check timeout only
136          * when catch up.
137          */
138         do {
139                 if (tstc()) {
140                         if (presskey_len < presskey_max) {
141                                 presskey [presskey_len ++] = getc();
142                         }
143                         else {
144                                 for (i = 0; i < presskey_max - 1; i ++)
145                                         presskey [i] = presskey [i + 1];
146
147                                 presskey [i] = getc();
148                         }
149                 }
150
151                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
152                         if (delaykey[i].len > 0 &&
153                             presskey_len >= delaykey[i].len &&
154                             memcmp (presskey + presskey_len - delaykey[i].len,
155                                     delaykey[i].str,
156                                     delaykey[i].len) == 0) {
157                                 debug_bootkeys("got %skey\n",
158                                                delaykey[i].retry ? "delay" :
159                                                "stop");
160
161 #  ifdef CONFIG_BOOT_RETRY_TIME
162                                 /* don't retry auto boot */
163                                 if (! delaykey[i].retry)
164                                         retry_time = -1;
165 #  endif
166                                 abort = 1;
167                         }
168                 }
169         } while (!abort && get_ticks() <= etime);
170
171         if (!abort)
172                 debug_bootkeys("key timeout\n");
173
174 #ifdef CONFIG_SILENT_CONSOLE
175         if (abort)
176                 gd->flags &= ~GD_FLG_SILENT;
177 #endif
178
179         return abort;
180 }
181
182 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
183
184 #ifdef CONFIG_MENUKEY
185 static int menukey = 0;
186 #endif
187
188 static int abortboot_normal(int bootdelay)
189 {
190         int abort = 0;
191         unsigned long ts;
192
193 #ifdef CONFIG_MENUPROMPT
194         printf(CONFIG_MENUPROMPT);
195 #else
196         if (bootdelay >= 0)
197                 printf("Hit any key to stop autoboot: %2d ", bootdelay);
198 #endif
199
200 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
201         /*
202          * Check if key already pressed
203          * Don't check if bootdelay < 0
204          */
205         if (bootdelay >= 0) {
206                 if (tstc()) {   /* we got a key press   */
207                         (void) getc();  /* consume input        */
208                         puts ("\b\b\b 0");
209                         abort = 1;      /* don't auto boot      */
210                 }
211         }
212 #endif
213
214         while ((bootdelay > 0) && (!abort)) {
215                 --bootdelay;
216                 /* delay 1000 ms */
217                 ts = get_timer(0);
218                 do {
219                         if (tstc()) {   /* we got a key press   */
220                                 abort  = 1;     /* don't auto boot      */
221                                 bootdelay = 0;  /* no more delay        */
222 # ifdef CONFIG_MENUKEY
223                                 menukey = getc();
224 # else
225                                 (void) getc();  /* consume input        */
226 # endif
227                                 break;
228                         }
229                         udelay(10000);
230                 } while (!abort && get_timer(ts) < 1000);
231
232                 printf("\b\b\b%2d ", bootdelay);
233         }
234
235         putc('\n');
236
237 #ifdef CONFIG_SILENT_CONSOLE
238         if (abort)
239                 gd->flags &= ~GD_FLG_SILENT;
240 #endif
241
242         return abort;
243 }
244 # endif /* CONFIG_AUTOBOOT_KEYED */
245
246 static int abortboot(int bootdelay)
247 {
248 #ifdef CONFIG_AUTOBOOT_KEYED
249         return abortboot_keyed(bootdelay);
250 #else
251         return abortboot_normal(bootdelay);
252 #endif
253 }
254 #endif  /* CONFIG_BOOTDELAY */
255
256 /*
257  * Runs the given boot command securely.  Specifically:
258  * - Doesn't run the command with the shell (run_command or parse_string_outer),
259  *   since that's a lot of code surface that an attacker might exploit.
260  *   Because of this, we don't do any argument parsing--the secure boot command
261  *   has to be a full-fledged u-boot command.
262  * - Doesn't check for keypresses before booting, since that could be a
263  *   security hole; also disables Ctrl-C.
264  * - Doesn't allow the command to return.
265  *
266  * Upon any failures, this function will drop into an infinite loop after
267  * printing the error message to console.
268  */
269
270 #if defined(CONFIG_BOOTDELAY) && defined(CONFIG_OF_CONTROL)
271 static void secure_boot_cmd(char *cmd)
272 {
273         cmd_tbl_t *cmdtp;
274         int rc;
275
276         if (!cmd) {
277                 printf("## Error: Secure boot command not specified\n");
278                 goto err;
279         }
280
281         /* Disable Ctrl-C just in case some command is used that checks it. */
282         disable_ctrlc(1);
283
284         /* Find the command directly. */
285         cmdtp = find_cmd(cmd);
286         if (!cmdtp) {
287                 printf("## Error: \"%s\" not defined\n", cmd);
288                 goto err;
289         }
290
291         /* Run the command, forcing no flags and faking argc and argv. */
292         rc = (cmdtp->cmd)(cmdtp, 0, 1, &cmd);
293
294         /* Shouldn't ever return from boot command. */
295         printf("## Error: \"%s\" returned (code %d)\n", cmd, rc);
296
297 err:
298         /*
299          * Not a whole lot to do here.  Rebooting won't help much, since we'll
300          * just end up right back here.  Just loop.
301          */
302         hang();
303 }
304
305 static void process_fdt_options(const void *blob)
306 {
307         ulong addr;
308
309         /* Add an env variable to point to a kernel payload, if available */
310         addr = fdtdec_get_config_int(gd->fdt_blob, "kernel-offset", 0);
311         if (addr)
312                 setenv_addr("kernaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
313
314         /* Add an env variable to point to a root disk, if available */
315         addr = fdtdec_get_config_int(gd->fdt_blob, "rootdisk-offset", 0);
316         if (addr)
317                 setenv_addr("rootaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
318 }
319 #endif /* CONFIG_OF_CONTROL */
320
321 #ifdef CONFIG_BOOTDELAY
322 static void process_boot_delay(void)
323 {
324 #ifdef CONFIG_OF_CONTROL
325         char *env;
326 #endif
327         char *s;
328         int bootdelay;
329 #ifdef CONFIG_BOOTCOUNT_LIMIT
330         unsigned long bootcount = 0;
331         unsigned long bootlimit = 0;
332 #endif /* CONFIG_BOOTCOUNT_LIMIT */
333
334 #ifdef CONFIG_BOOTCOUNT_LIMIT
335         bootcount = bootcount_load();
336         bootcount++;
337         bootcount_store (bootcount);
338         setenv_ulong("bootcount", bootcount);
339         bootlimit = getenv_ulong("bootlimit", 10, 0);
340 #endif /* CONFIG_BOOTCOUNT_LIMIT */
341
342         s = getenv ("bootdelay");
343         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
344
345 #ifdef CONFIG_OF_CONTROL
346         bootdelay = fdtdec_get_config_int(gd->fdt_blob, "bootdelay",
347                         bootdelay);
348 #endif
349
350         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
351
352 #if defined(CONFIG_MENU_SHOW)
353         bootdelay = menu_show(bootdelay);
354 #endif
355 # ifdef CONFIG_BOOT_RETRY_TIME
356         init_cmd_timeout ();
357 # endif /* CONFIG_BOOT_RETRY_TIME */
358
359 #ifdef CONFIG_POST
360         if (gd->flags & GD_FLG_POSTFAIL) {
361                 s = getenv("failbootcmd");
362         }
363         else
364 #endif /* CONFIG_POST */
365 #ifdef CONFIG_BOOTCOUNT_LIMIT
366         if (bootlimit && (bootcount > bootlimit)) {
367                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
368                         (unsigned)bootlimit);
369                 s = getenv ("altbootcmd");
370         }
371         else
372 #endif /* CONFIG_BOOTCOUNT_LIMIT */
373                 s = getenv ("bootcmd");
374 #ifdef CONFIG_OF_CONTROL
375         /* Allow the fdt to override the boot command */
376         env = fdtdec_get_config_string(gd->fdt_blob, "bootcmd");
377         if (env)
378                 s = env;
379
380         process_fdt_options(gd->fdt_blob);
381
382         /*
383          * If the bootsecure option was chosen, use secure_boot_cmd().
384          * Always use 'env' in this case, since bootsecure requres that the
385          * bootcmd was specified in the FDT too.
386          */
387         if (fdtdec_get_config_int(gd->fdt_blob, "bootsecure", 0))
388                 secure_boot_cmd(env);
389
390 #endif /* CONFIG_OF_CONTROL */
391
392         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
393
394         if (bootdelay != -1 && s && !abortboot(bootdelay)) {
395 #if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC)
396                 int prev = disable_ctrlc(1);    /* disable Control C checking */
397 #endif
398
399                 run_command_list(s, -1, 0);
400
401 #if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC)
402                 disable_ctrlc(prev);    /* restore Control C checking */
403 #endif
404         }
405
406 #ifdef CONFIG_MENUKEY
407         if (menukey == CONFIG_MENUKEY) {
408                 s = getenv("menucmd");
409                 if (s)
410                         run_command_list(s, -1, 0);
411         }
412 #endif /* CONFIG_MENUKEY */
413 }
414 #endif /* CONFIG_BOOTDELAY */
415
416 void main_loop(void)
417 {
418 #ifndef CONFIG_SYS_HUSH_PARSER
419         static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
420         int len;
421         int rc = 1;
422         int flag;
423 #endif
424 #ifdef CONFIG_PREBOOT
425         char *p;
426 #endif
427
428         bootstage_mark_name(BOOTSTAGE_ID_MAIN_LOOP, "main_loop");
429
430 #ifndef CONFIG_SYS_GENERIC_BOARD
431         puts("Warning: Your board does not use generic board. Please read\n");
432         puts("doc/README.generic-board and take action. Boards not\n");
433         puts("upgraded by the late 2014 may break or be removed.\n");
434 #endif
435
436 #ifdef CONFIG_MODEM_SUPPORT
437         debug("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
438         if (do_mdm_init) {
439                 char *str = strdup(getenv("mdm_cmd"));
440                 setenv("preboot", str);  /* set or delete definition */
441                 if (str != NULL)
442                         free(str);
443                 mdm_init(); /* wait for modem connection */
444         }
445 #endif  /* CONFIG_MODEM_SUPPORT */
446
447 #ifdef CONFIG_VERSION_VARIABLE
448         {
449                 setenv("ver", version_string);  /* set version variable */
450         }
451 #endif /* CONFIG_VERSION_VARIABLE */
452
453 #ifdef CONFIG_SYS_HUSH_PARSER
454         u_boot_hush_start();
455 #endif
456
457 #if defined(CONFIG_HUSH_INIT_VAR)
458         hush_init_var();
459 #endif
460
461 #ifdef CONFIG_PREBOOT
462         p = getenv("preboot");
463         if (p != NULL) {
464 # ifdef CONFIG_AUTOBOOT_KEYED
465                 int prev = disable_ctrlc(1);    /* disable Control C checking */
466 # endif
467
468                 run_command_list(p, -1, 0);
469
470 # ifdef CONFIG_AUTOBOOT_KEYED
471                 disable_ctrlc(prev);    /* restore Control C checking */
472 # endif
473         }
474 #endif /* CONFIG_PREBOOT */
475
476 #if defined(CONFIG_UPDATE_TFTP)
477         update_tftp(0UL);
478 #endif /* CONFIG_UPDATE_TFTP */
479
480 #ifdef CONFIG_BOOTDELAY
481         process_boot_delay();
482 #endif
483         /*
484          * Main Loop for Monitor Command Processing
485          */
486 #ifdef CONFIG_SYS_HUSH_PARSER
487         parse_file_outer();
488         /* This point is never reached */
489         for (;;);
490 #else
491         for (;;) {
492 #ifdef CONFIG_BOOT_RETRY_TIME
493                 if (rc >= 0) {
494                         /* Saw enough of a valid command to
495                          * restart the timeout.
496                          */
497                         reset_cmd_timeout();
498                 }
499 #endif
500                 len = readline (CONFIG_SYS_PROMPT);
501
502                 flag = 0;       /* assume no special flags for now */
503                 if (len > 0)
504                         strcpy (lastcommand, console_buffer);
505                 else if (len == 0)
506                         flag |= CMD_FLAG_REPEAT;
507 #ifdef CONFIG_BOOT_RETRY_TIME
508                 else if (len == -2) {
509                         /* -2 means timed out, retry autoboot
510                          */
511                         puts ("\nTimed out waiting for command\n");
512 # ifdef CONFIG_RESET_TO_RETRY
513                         /* Reinit board to run initialization code again */
514                         do_reset (NULL, 0, 0, NULL);
515 # else
516                         return;         /* retry autoboot */
517 # endif
518                 }
519 #endif
520
521                 if (len == -1)
522                         puts ("<INTERRUPT>\n");
523                 else
524                         rc = run_command(lastcommand, flag);
525
526                 if (rc <= 0) {
527                         /* invalid command or not repeatable, forget it */
528                         lastcommand[0] = 0;
529                 }
530         }
531 #endif /*CONFIG_SYS_HUSH_PARSER*/
532 }
533
534 #ifdef CONFIG_BOOT_RETRY_TIME
535 /***************************************************************************
536  * initialize command line timeout
537  */
538 void init_cmd_timeout(void)
539 {
540         char *s = getenv ("bootretry");
541
542         if (s != NULL)
543                 retry_time = (int)simple_strtol(s, NULL, 10);
544         else
545                 retry_time =  CONFIG_BOOT_RETRY_TIME;
546
547         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
548                 retry_time = CONFIG_BOOT_RETRY_MIN;
549 }
550
551 /***************************************************************************
552  * reset command line timeout to retry_time seconds
553  */
554 void reset_cmd_timeout(void)
555 {
556         endtime = endtick(retry_time);
557 }
558 #endif
559
560 #ifdef CONFIG_CMDLINE_EDITING
561
562 /*
563  * cmdline-editing related codes from vivi.
564  * Author: Janghoon Lyu <nandy@mizi.com>
565  */
566
567 #define putnstr(str,n)  do {                    \
568                 printf ("%.*s", (int)n, str);   \
569         } while (0)
570
571 #define CTL_CH(c)               ((c) - 'a' + 1)
572 #define CTL_BACKSPACE           ('\b')
573 #define DEL                     ((char)255)
574 #define DEL7                    ((char)127)
575 #define CREAD_HIST_CHAR         ('!')
576
577 #define getcmd_putch(ch)        putc(ch)
578 #define getcmd_getch()          getc()
579 #define getcmd_cbeep()          getcmd_putch('\a')
580
581 #define HIST_MAX                20
582 #define HIST_SIZE               CONFIG_SYS_CBSIZE
583
584 static int hist_max;
585 static int hist_add_idx;
586 static int hist_cur = -1;
587 static unsigned hist_num;
588
589 static char *hist_list[HIST_MAX];
590 static char hist_lines[HIST_MAX][HIST_SIZE + 1];        /* Save room for NULL */
591
592 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
593
594 static void hist_init(void)
595 {
596         int i;
597
598         hist_max = 0;
599         hist_add_idx = 0;
600         hist_cur = -1;
601         hist_num = 0;
602
603         for (i = 0; i < HIST_MAX; i++) {
604                 hist_list[i] = hist_lines[i];
605                 hist_list[i][0] = '\0';
606         }
607 }
608
609 static void cread_add_to_hist(char *line)
610 {
611         strcpy(hist_list[hist_add_idx], line);
612
613         if (++hist_add_idx >= HIST_MAX)
614                 hist_add_idx = 0;
615
616         if (hist_add_idx > hist_max)
617                 hist_max = hist_add_idx;
618
619         hist_num++;
620 }
621
622 static char* hist_prev(void)
623 {
624         char *ret;
625         int old_cur;
626
627         if (hist_cur < 0)
628                 return NULL;
629
630         old_cur = hist_cur;
631         if (--hist_cur < 0)
632                 hist_cur = hist_max;
633
634         if (hist_cur == hist_add_idx) {
635                 hist_cur = old_cur;
636                 ret = NULL;
637         } else
638                 ret = hist_list[hist_cur];
639
640         return (ret);
641 }
642
643 static char* hist_next(void)
644 {
645         char *ret;
646
647         if (hist_cur < 0)
648                 return NULL;
649
650         if (hist_cur == hist_add_idx)
651                 return NULL;
652
653         if (++hist_cur > hist_max)
654                 hist_cur = 0;
655
656         if (hist_cur == hist_add_idx) {
657                 ret = "";
658         } else
659                 ret = hist_list[hist_cur];
660
661         return (ret);
662 }
663
664 #ifndef CONFIG_CMDLINE_EDITING
665 static void cread_print_hist_list(void)
666 {
667         int i;
668         unsigned long n;
669
670         n = hist_num - hist_max;
671
672         i = hist_add_idx + 1;
673         while (1) {
674                 if (i > hist_max)
675                         i = 0;
676                 if (i == hist_add_idx)
677                         break;
678                 printf("%s\n", hist_list[i]);
679                 n++;
680                 i++;
681         }
682 }
683 #endif /* CONFIG_CMDLINE_EDITING */
684
685 #define BEGINNING_OF_LINE() {                   \
686         while (num) {                           \
687                 getcmd_putch(CTL_BACKSPACE);    \
688                 num--;                          \
689         }                                       \
690 }
691
692 #define ERASE_TO_EOL() {                                \
693         if (num < eol_num) {                            \
694                 printf("%*s", (int)(eol_num - num), ""); \
695                 do {                                    \
696                         getcmd_putch(CTL_BACKSPACE);    \
697                 } while (--eol_num > num);              \
698         }                                               \
699 }
700
701 #define REFRESH_TO_EOL() {                      \
702         if (num < eol_num) {                    \
703                 wlen = eol_num - num;           \
704                 putnstr(buf + num, wlen);       \
705                 num = eol_num;                  \
706         }                                       \
707 }
708
709 static void cread_add_char(char ichar, int insert, unsigned long *num,
710                unsigned long *eol_num, char *buf, unsigned long len)
711 {
712         unsigned long wlen;
713
714         /* room ??? */
715         if (insert || *num == *eol_num) {
716                 if (*eol_num > len - 1) {
717                         getcmd_cbeep();
718                         return;
719                 }
720                 (*eol_num)++;
721         }
722
723         if (insert) {
724                 wlen = *eol_num - *num;
725                 if (wlen > 1) {
726                         memmove(&buf[*num+1], &buf[*num], wlen-1);
727                 }
728
729                 buf[*num] = ichar;
730                 putnstr(buf + *num, wlen);
731                 (*num)++;
732                 while (--wlen) {
733                         getcmd_putch(CTL_BACKSPACE);
734                 }
735         } else {
736                 /* echo the character */
737                 wlen = 1;
738                 buf[*num] = ichar;
739                 putnstr(buf + *num, wlen);
740                 (*num)++;
741         }
742 }
743
744 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
745               unsigned long *eol_num, char *buf, unsigned long len)
746 {
747         while (strsize--) {
748                 cread_add_char(*str, insert, num, eol_num, buf, len);
749                 str++;
750         }
751 }
752
753 static int cread_line(const char *const prompt, char *buf, unsigned int *len,
754                 int timeout)
755 {
756         unsigned long num = 0;
757         unsigned long eol_num = 0;
758         unsigned long wlen;
759         char ichar;
760         int insert = 1;
761         int esc_len = 0;
762         char esc_save[8];
763         int init_len = strlen(buf);
764         int first = 1;
765
766         if (init_len)
767                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
768
769         while (1) {
770 #ifdef CONFIG_BOOT_RETRY_TIME
771                 while (!tstc()) {       /* while no incoming data */
772                         if (retry_time >= 0 && get_ticks() > endtime)
773                                 return (-2);    /* timed out */
774                         WATCHDOG_RESET();
775                 }
776 #endif
777                 if (first && timeout) {
778                         uint64_t etime = endtick(timeout);
779
780                         while (!tstc()) {       /* while no incoming data */
781                                 if (get_ticks() >= etime)
782                                         return -2;      /* timed out */
783                                 WATCHDOG_RESET();
784                         }
785                         first = 0;
786                 }
787
788                 ichar = getcmd_getch();
789
790                 if ((ichar == '\n') || (ichar == '\r')) {
791                         putc('\n');
792                         break;
793                 }
794
795                 /*
796                  * handle standard linux xterm esc sequences for arrow key, etc.
797                  */
798                 if (esc_len != 0) {
799                         if (esc_len == 1) {
800                                 if (ichar == '[') {
801                                         esc_save[esc_len] = ichar;
802                                         esc_len = 2;
803                                 } else {
804                                         cread_add_str(esc_save, esc_len, insert,
805                                                       &num, &eol_num, buf, *len);
806                                         esc_len = 0;
807                                 }
808                                 continue;
809                         }
810
811                         switch (ichar) {
812
813                         case 'D':       /* <- key */
814                                 ichar = CTL_CH('b');
815                                 esc_len = 0;
816                                 break;
817                         case 'C':       /* -> key */
818                                 ichar = CTL_CH('f');
819                                 esc_len = 0;
820                                 break;  /* pass off to ^F handler */
821                         case 'H':       /* Home key */
822                                 ichar = CTL_CH('a');
823                                 esc_len = 0;
824                                 break;  /* pass off to ^A handler */
825                         case 'A':       /* up arrow */
826                                 ichar = CTL_CH('p');
827                                 esc_len = 0;
828                                 break;  /* pass off to ^P handler */
829                         case 'B':       /* down arrow */
830                                 ichar = CTL_CH('n');
831                                 esc_len = 0;
832                                 break;  /* pass off to ^N handler */
833                         default:
834                                 esc_save[esc_len++] = ichar;
835                                 cread_add_str(esc_save, esc_len, insert,
836                                               &num, &eol_num, buf, *len);
837                                 esc_len = 0;
838                                 continue;
839                         }
840                 }
841
842                 switch (ichar) {
843                 case 0x1b:
844                         if (esc_len == 0) {
845                                 esc_save[esc_len] = ichar;
846                                 esc_len = 1;
847                         } else {
848                                 puts("impossible condition #876\n");
849                                 esc_len = 0;
850                         }
851                         break;
852
853                 case CTL_CH('a'):
854                         BEGINNING_OF_LINE();
855                         break;
856                 case CTL_CH('c'):       /* ^C - break */
857                         *buf = '\0';    /* discard input */
858                         return (-1);
859                 case CTL_CH('f'):
860                         if (num < eol_num) {
861                                 getcmd_putch(buf[num]);
862                                 num++;
863                         }
864                         break;
865                 case CTL_CH('b'):
866                         if (num) {
867                                 getcmd_putch(CTL_BACKSPACE);
868                                 num--;
869                         }
870                         break;
871                 case CTL_CH('d'):
872                         if (num < eol_num) {
873                                 wlen = eol_num - num - 1;
874                                 if (wlen) {
875                                         memmove(&buf[num], &buf[num+1], wlen);
876                                         putnstr(buf + num, wlen);
877                                 }
878
879                                 getcmd_putch(' ');
880                                 do {
881                                         getcmd_putch(CTL_BACKSPACE);
882                                 } while (wlen--);
883                                 eol_num--;
884                         }
885                         break;
886                 case CTL_CH('k'):
887                         ERASE_TO_EOL();
888                         break;
889                 case CTL_CH('e'):
890                         REFRESH_TO_EOL();
891                         break;
892                 case CTL_CH('o'):
893                         insert = !insert;
894                         break;
895                 case CTL_CH('x'):
896                 case CTL_CH('u'):
897                         BEGINNING_OF_LINE();
898                         ERASE_TO_EOL();
899                         break;
900                 case DEL:
901                 case DEL7:
902                 case 8:
903                         if (num) {
904                                 wlen = eol_num - num;
905                                 num--;
906                                 memmove(&buf[num], &buf[num+1], wlen);
907                                 getcmd_putch(CTL_BACKSPACE);
908                                 putnstr(buf + num, wlen);
909                                 getcmd_putch(' ');
910                                 do {
911                                         getcmd_putch(CTL_BACKSPACE);
912                                 } while (wlen--);
913                                 eol_num--;
914                         }
915                         break;
916                 case CTL_CH('p'):
917                 case CTL_CH('n'):
918                 {
919                         char * hline;
920
921                         esc_len = 0;
922
923                         if (ichar == CTL_CH('p'))
924                                 hline = hist_prev();
925                         else
926                                 hline = hist_next();
927
928                         if (!hline) {
929                                 getcmd_cbeep();
930                                 continue;
931                         }
932
933                         /* nuke the current line */
934                         /* first, go home */
935                         BEGINNING_OF_LINE();
936
937                         /* erase to end of line */
938                         ERASE_TO_EOL();
939
940                         /* copy new line into place and display */
941                         strcpy(buf, hline);
942                         eol_num = strlen(buf);
943                         REFRESH_TO_EOL();
944                         continue;
945                 }
946 #ifdef CONFIG_AUTO_COMPLETE
947                 case '\t': {
948                         int num2, col;
949
950                         /* do not autocomplete when in the middle */
951                         if (num < eol_num) {
952                                 getcmd_cbeep();
953                                 break;
954                         }
955
956                         buf[num] = '\0';
957                         col = strlen(prompt) + eol_num;
958                         num2 = num;
959                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
960                                 col = num2 - num;
961                                 num += col;
962                                 eol_num += col;
963                         }
964                         break;
965                 }
966 #endif
967                 default:
968                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
969                         break;
970                 }
971         }
972         *len = eol_num;
973         buf[eol_num] = '\0';    /* lose the newline */
974
975         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
976                 cread_add_to_hist(buf);
977         hist_cur = hist_add_idx;
978
979         return 0;
980 }
981
982 #endif /* CONFIG_CMDLINE_EDITING */
983
984 /****************************************************************************/
985
986 /*
987  * Prompt for input and read a line.
988  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
989  * time out when time goes past endtime (timebase time in ticks).
990  * Return:      number of read characters
991  *              -1 if break
992  *              -2 if timed out
993  */
994 int readline (const char *const prompt)
995 {
996         /*
997          * If console_buffer isn't 0-length the user will be prompted to modify
998          * it instead of entering it from scratch as desired.
999          */
1000         console_buffer[0] = '\0';
1001
1002         return readline_into_buffer(prompt, console_buffer, 0);
1003 }
1004
1005
1006 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
1007 {
1008         char *p = buffer;
1009 #ifdef CONFIG_CMDLINE_EDITING
1010         unsigned int len = CONFIG_SYS_CBSIZE;
1011         int rc;
1012         static int initted = 0;
1013
1014         /*
1015          * History uses a global array which is not
1016          * writable until after relocation to RAM.
1017          * Revert to non-history version if still
1018          * running from flash.
1019          */
1020         if (gd->flags & GD_FLG_RELOC) {
1021                 if (!initted) {
1022                         hist_init();
1023                         initted = 1;
1024                 }
1025
1026                 if (prompt)
1027                         puts (prompt);
1028
1029                 rc = cread_line(prompt, p, &len, timeout);
1030                 return rc < 0 ? rc : len;
1031
1032         } else {
1033 #endif  /* CONFIG_CMDLINE_EDITING */
1034         char * p_buf = p;
1035         int     n = 0;                          /* buffer index         */
1036         int     plen = 0;                       /* prompt length        */
1037         int     col;                            /* output column cnt    */
1038         char    c;
1039
1040         /* print prompt */
1041         if (prompt) {
1042                 plen = strlen (prompt);
1043                 puts (prompt);
1044         }
1045         col = plen;
1046
1047         for (;;) {
1048 #ifdef CONFIG_BOOT_RETRY_TIME
1049                 while (!tstc()) {       /* while no incoming data */
1050                         if (retry_time >= 0 && get_ticks() > endtime)
1051                                 return (-2);    /* timed out */
1052                         WATCHDOG_RESET();
1053                 }
1054 #endif
1055                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
1056
1057 #ifdef CONFIG_SHOW_ACTIVITY
1058                 while (!tstc()) {
1059                         show_activity(0);
1060                         WATCHDOG_RESET();
1061                 }
1062 #endif
1063                 c = getc();
1064
1065                 /*
1066                  * Special character handling
1067                  */
1068                 switch (c) {
1069                 case '\r':                      /* Enter                */
1070                 case '\n':
1071                         *p = '\0';
1072                         puts ("\r\n");
1073                         return p - p_buf;
1074
1075                 case '\0':                      /* nul                  */
1076                         continue;
1077
1078                 case 0x03:                      /* ^C - break           */
1079                         p_buf[0] = '\0';        /* discard input */
1080                         return -1;
1081
1082                 case 0x15:                      /* ^U - erase line      */
1083                         while (col > plen) {
1084                                 puts (erase_seq);
1085                                 --col;
1086                         }
1087                         p = p_buf;
1088                         n = 0;
1089                         continue;
1090
1091                 case 0x17:                      /* ^W - erase word      */
1092                         p=delete_char(p_buf, p, &col, &n, plen);
1093                         while ((n > 0) && (*p != ' ')) {
1094                                 p=delete_char(p_buf, p, &col, &n, plen);
1095                         }
1096                         continue;
1097
1098                 case 0x08:                      /* ^H  - backspace      */
1099                 case 0x7F:                      /* DEL - backspace      */
1100                         p=delete_char(p_buf, p, &col, &n, plen);
1101                         continue;
1102
1103                 default:
1104                         /*
1105                          * Must be a normal character then
1106                          */
1107                         if (n < CONFIG_SYS_CBSIZE-2) {
1108                                 if (c == '\t') {        /* expand TABs */
1109 #ifdef CONFIG_AUTO_COMPLETE
1110                                         /* if auto completion triggered just continue */
1111                                         *p = '\0';
1112                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1113                                                 p = p_buf + n;  /* reset */
1114                                                 continue;
1115                                         }
1116 #endif
1117                                         puts (tab_seq+(col&07));
1118                                         col += 8 - (col&07);
1119                                 } else {
1120                                         char buf[2];
1121
1122                                         /*
1123                                          * Echo input using puts() to force an
1124                                          * LCD flush if we are using an LCD
1125                                          */
1126                                         ++col;
1127                                         buf[0] = c;
1128                                         buf[1] = '\0';
1129                                         puts(buf);
1130                                 }
1131                                 *p++ = c;
1132                                 ++n;
1133                         } else {                        /* Buffer full          */
1134                                 putc ('\a');
1135                         }
1136                 }
1137         }
1138 #ifdef CONFIG_CMDLINE_EDITING
1139         }
1140 #endif
1141 }
1142
1143 /****************************************************************************/
1144
1145 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1146 {
1147         char *s;
1148
1149         if (*np == 0) {
1150                 return (p);
1151         }
1152
1153         if (*(--p) == '\t') {                   /* will retype the whole line   */
1154                 while (*colp > plen) {
1155                         puts (erase_seq);
1156                         (*colp)--;
1157                 }
1158                 for (s=buffer; s<p; ++s) {
1159                         if (*s == '\t') {
1160                                 puts (tab_seq+((*colp) & 07));
1161                                 *colp += 8 - ((*colp) & 07);
1162                         } else {
1163                                 ++(*colp);
1164                                 putc (*s);
1165                         }
1166                 }
1167         } else {
1168                 puts (erase_seq);
1169                 (*colp)--;
1170         }
1171         (*np)--;
1172         return (p);
1173 }
1174
1175 /****************************************************************************/
1176
1177 int parse_line (char *line, char *argv[])
1178 {
1179         int nargs = 0;
1180
1181         debug_parser("parse_line: \"%s\"\n", line);
1182         while (nargs < CONFIG_SYS_MAXARGS) {
1183
1184                 /* skip any white space */
1185                 while (isblank(*line))
1186                         ++line;
1187
1188                 if (*line == '\0') {    /* end of line, no more args    */
1189                         argv[nargs] = NULL;
1190                         debug_parser("parse_line: nargs=%d\n", nargs);
1191                         return nargs;
1192                 }
1193
1194                 argv[nargs++] = line;   /* begin of argument string     */
1195
1196                 /* find end of string */
1197                 while (*line && !isblank(*line))
1198                         ++line;
1199
1200                 if (*line == '\0') {    /* end of line, no more args    */
1201                         argv[nargs] = NULL;
1202                         debug_parser("parse_line: nargs=%d\n", nargs);
1203                         return nargs;
1204                 }
1205
1206                 *line++ = '\0';         /* terminate current arg         */
1207         }
1208
1209         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1210
1211         debug_parser("parse_line: nargs=%d\n", nargs);
1212         return (nargs);
1213 }
1214
1215 /****************************************************************************/
1216
1217 #ifndef CONFIG_SYS_HUSH_PARSER
1218 static void process_macros (const char *input, char *output)
1219 {
1220         char c, prev;
1221         const char *varname_start = NULL;
1222         int inputcnt = strlen (input);
1223         int outputcnt = CONFIG_SYS_CBSIZE;
1224         int state = 0;          /* 0 = waiting for '$'  */
1225
1226         /* 1 = waiting for '(' or '{' */
1227         /* 2 = waiting for ')' or '}' */
1228         /* 3 = waiting for '''  */
1229         char *output_start = output;
1230
1231         debug_parser("[PROCESS_MACROS] INPUT len %zd: \"%s\"\n", strlen(input),
1232                      input);
1233
1234         prev = '\0';            /* previous character   */
1235
1236         while (inputcnt && outputcnt) {
1237                 c = *input++;
1238                 inputcnt--;
1239
1240                 if (state != 3) {
1241                         /* remove one level of escape characters */
1242                         if ((c == '\\') && (prev != '\\')) {
1243                                 if (inputcnt-- == 0)
1244                                         break;
1245                                 prev = c;
1246                                 c = *input++;
1247                         }
1248                 }
1249
1250                 switch (state) {
1251                 case 0: /* Waiting for (unescaped) $    */
1252                         if ((c == '\'') && (prev != '\\')) {
1253                                 state = 3;
1254                                 break;
1255                         }
1256                         if ((c == '$') && (prev != '\\')) {
1257                                 state++;
1258                         } else {
1259                                 *(output++) = c;
1260                                 outputcnt--;
1261                         }
1262                         break;
1263                 case 1: /* Waiting for (        */
1264                         if (c == '(' || c == '{') {
1265                                 state++;
1266                                 varname_start = input;
1267                         } else {
1268                                 state = 0;
1269                                 *(output++) = '$';
1270                                 outputcnt--;
1271
1272                                 if (outputcnt) {
1273                                         *(output++) = c;
1274                                         outputcnt--;
1275                                 }
1276                         }
1277                         break;
1278                 case 2: /* Waiting for )        */
1279                         if (c == ')' || c == '}') {
1280                                 int i;
1281                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1282                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1283
1284                                 /* Get the varname */
1285                                 for (i = 0; i < envcnt; i++) {
1286                                         envname[i] = varname_start[i];
1287                                 }
1288                                 envname[i] = 0;
1289
1290                                 /* Get its value */
1291                                 envval = getenv (envname);
1292
1293                                 /* Copy into the line if it exists */
1294                                 if (envval != NULL)
1295                                         while ((*envval) && outputcnt) {
1296                                                 *(output++) = *(envval++);
1297                                                 outputcnt--;
1298                                         }
1299                                 /* Look for another '$' */
1300                                 state = 0;
1301                         }
1302                         break;
1303                 case 3: /* Waiting for '        */
1304                         if ((c == '\'') && (prev != '\\')) {
1305                                 state = 0;
1306                         } else {
1307                                 *(output++) = c;
1308                                 outputcnt--;
1309                         }
1310                         break;
1311                 }
1312                 prev = c;
1313         }
1314
1315         if (outputcnt)
1316                 *output = 0;
1317         else
1318                 *(output - 1) = 0;
1319
1320         debug_parser("[PROCESS_MACROS] OUTPUT len %zd: \"%s\"\n",
1321                      strlen(output_start), output_start);
1322 }
1323
1324 /****************************************************************************
1325  * returns:
1326  *      1  - command executed, repeatable
1327  *      0  - command executed but not repeatable, interrupted commands are
1328  *           always considered not repeatable
1329  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1330  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1331  *           considered unrecognized)
1332  *
1333  * WARNING:
1334  *
1335  * We must create a temporary copy of the command since the command we get
1336  * may be the result from getenv(), which returns a pointer directly to
1337  * the environment data, which may change magicly when the command we run
1338  * creates or modifies environment variables (like "bootp" does).
1339  */
1340 static int builtin_run_command(const char *cmd, int flag)
1341 {
1342         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1343         char *token;                    /* start of token in cmdbuf     */
1344         char *sep;                      /* end of token (separator) in cmdbuf */
1345         char finaltoken[CONFIG_SYS_CBSIZE];
1346         char *str = cmdbuf;
1347         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1348         int argc, inquotes;
1349         int repeatable = 1;
1350         int rc = 0;
1351
1352         debug_parser("[RUN_COMMAND] cmd[%p]=\"", cmd);
1353         if (DEBUG_PARSER) {
1354                 /* use puts - string may be loooong */
1355                 puts(cmd ? cmd : "NULL");
1356                 puts("\"\n");
1357         }
1358         clear_ctrlc();          /* forget any previous Control C */
1359
1360         if (!cmd || !*cmd) {
1361                 return -1;      /* empty command */
1362         }
1363
1364         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1365                 puts ("## Command too long!\n");
1366                 return -1;
1367         }
1368
1369         strcpy (cmdbuf, cmd);
1370
1371         /* Process separators and check for invalid
1372          * repeatable commands
1373          */
1374
1375         debug_parser("[PROCESS_SEPARATORS] %s\n", cmd);
1376         while (*str) {
1377
1378                 /*
1379                  * Find separator, or string end
1380                  * Allow simple escape of ';' by writing "\;"
1381                  */
1382                 for (inquotes = 0, sep = str; *sep; sep++) {
1383                         if ((*sep=='\'') &&
1384                             (*(sep-1) != '\\'))
1385                                 inquotes=!inquotes;
1386
1387                         if (!inquotes &&
1388                             (*sep == ';') &&    /* separator            */
1389                             ( sep != str) &&    /* past string start    */
1390                             (*(sep-1) != '\\')) /* and NOT escaped      */
1391                                 break;
1392                 }
1393
1394                 /*
1395                  * Limit the token to data between separators
1396                  */
1397                 token = str;
1398                 if (*sep) {
1399                         str = sep + 1;  /* start of command for next pass */
1400                         *sep = '\0';
1401                 }
1402                 else
1403                         str = sep;      /* no more commands for next pass */
1404                 debug_parser("token: \"%s\"\n", token);
1405
1406                 /* find macros in this token and replace them */
1407                 process_macros (token, finaltoken);
1408
1409                 /* Extract arguments */
1410                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1411                         rc = -1;        /* no command at all */
1412                         continue;
1413                 }
1414
1415                 if (cmd_process(flag, argc, argv, &repeatable, NULL))
1416                         rc = -1;
1417
1418                 /* Did the user stop this? */
1419                 if (had_ctrlc ())
1420                         return -1;      /* if stopped then not repeatable */
1421         }
1422
1423         return rc ? rc : repeatable;
1424 }
1425 #endif
1426
1427 /*
1428  * Run a command using the selected parser.
1429  *
1430  * @param cmd   Command to run
1431  * @param flag  Execution flags (CMD_FLAG_...)
1432  * @return 0 on success, or != 0 on error.
1433  */
1434 int run_command(const char *cmd, int flag)
1435 {
1436 #ifndef CONFIG_SYS_HUSH_PARSER
1437         /*
1438          * builtin_run_command can return 0 or 1 for success, so clean up
1439          * its result.
1440          */
1441         if (builtin_run_command(cmd, flag) == -1)
1442                 return 1;
1443
1444         return 0;
1445 #else
1446         return parse_string_outer(cmd,
1447                         FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
1448 #endif
1449 }
1450
1451 #ifndef CONFIG_SYS_HUSH_PARSER
1452 /**
1453  * Execute a list of command separated by ; or \n using the built-in parser.
1454  *
1455  * This function cannot take a const char * for the command, since if it
1456  * finds newlines in the string, it replaces them with \0.
1457  *
1458  * @param cmd   String containing list of commands
1459  * @param flag  Execution flags (CMD_FLAG_...)
1460  * @return 0 on success, or != 0 on error.
1461  */
1462 static int builtin_run_command_list(char *cmd, int flag)
1463 {
1464         char *line, *next;
1465         int rcode = 0;
1466
1467         /*
1468          * Break into individual lines, and execute each line; terminate on
1469          * error.
1470          */
1471         line = next = cmd;
1472         while (*next) {
1473                 if (*next == '\n') {
1474                         *next = '\0';
1475                         /* run only non-empty commands */
1476                         if (*line) {
1477                                 debug("** exec: \"%s\"\n", line);
1478                                 if (builtin_run_command(line, 0) < 0) {
1479                                         rcode = 1;
1480                                         break;
1481                                 }
1482                         }
1483                         line = next + 1;
1484                 }
1485                 ++next;
1486         }
1487         if (rcode == 0 && *line)
1488                 rcode = (builtin_run_command(line, 0) >= 0);
1489
1490         return rcode;
1491 }
1492 #endif
1493
1494 int run_command_list(const char *cmd, int len, int flag)
1495 {
1496         int need_buff = 1;
1497         char *buff = (char *)cmd;       /* cast away const */
1498         int rcode = 0;
1499
1500         if (len == -1) {
1501                 len = strlen(cmd);
1502 #ifdef CONFIG_SYS_HUSH_PARSER
1503                 /* hush will never change our string */
1504                 need_buff = 0;
1505 #else
1506                 /* the built-in parser will change our string if it sees \n */
1507                 need_buff = strchr(cmd, '\n') != NULL;
1508 #endif
1509         }
1510         if (need_buff) {
1511                 buff = malloc(len + 1);
1512                 if (!buff)
1513                         return 1;
1514                 memcpy(buff, cmd, len);
1515                 buff[len] = '\0';
1516         }
1517 #ifdef CONFIG_SYS_HUSH_PARSER
1518         rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON);
1519 #else
1520         /*
1521          * This function will overwrite any \n it sees with a \0, which
1522          * is why it can't work with a const char *. Here we are making
1523          * using of internal knowledge of this function, to avoid always
1524          * doing a malloc() which is actually required only in a case that
1525          * is pretty rare.
1526          */
1527         rcode = builtin_run_command_list(buff, flag);
1528         if (need_buff)
1529                 free(buff);
1530 #endif
1531
1532         return rcode;
1533 }
1534
1535 /****************************************************************************/
1536
1537 #if defined(CONFIG_CMD_RUN)
1538 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1539 {
1540         int i;
1541
1542         if (argc < 2)
1543                 return CMD_RET_USAGE;
1544
1545         for (i=1; i<argc; ++i) {
1546                 char *arg;
1547
1548                 if ((arg = getenv (argv[i])) == NULL) {
1549                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1550                         return 1;
1551                 }
1552
1553                 if (run_command_list(arg, -1, flag) != 0)
1554                         return 1;
1555         }
1556         return 0;
1557 }
1558 #endif