move CLI prototypes to cli.h and add comments
[oweals/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 <cli.h>
16 #include <command.h>
17 #include <fdtdec.h>
18 #include <cli_hush.h>
19 #include <malloc.h>
20 #include <menu.h>
21 #include <post.h>
22 #include <version.h>
23 #include <watchdog.h>
24 #include <linux/ctype.h>
25
26 DECLARE_GLOBAL_DATA_PTR;
27
28 /*
29  * Board-specific Platform code can reimplement show_boot_progress () if needed
30  */
31 void inline __show_boot_progress (int val) {}
32 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
33
34 #define MAX_DELAY_STOP_STR 32
35
36 #define DEBUG_PARSER    0       /* set to 1 to debug */
37
38 #define debug_parser(fmt, args...)              \
39         debug_cond(DEBUG_PARSER, fmt, ##args)
40
41 #ifndef DEBUG_BOOTKEYS
42 #define DEBUG_BOOTKEYS 0
43 #endif
44 #define debug_bootkeys(fmt, args...)            \
45         debug_cond(DEBUG_BOOTKEYS, fmt, ##args)
46
47 char        console_buffer[CONFIG_SYS_CBSIZE + 1];      /* console I/O buffer   */
48
49 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
50 static const char erase_seq[] = "\b \b";                /* erase sequence       */
51 static const char   tab_seq[] = "        ";             /* used to expand TABs  */
52
53 #ifdef CONFIG_BOOT_RETRY_TIME
54 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
55 static int      retry_time = -1; /* -1 so can call readline before main_loop */
56 #endif
57
58 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
59
60 #ifndef CONFIG_BOOT_RETRY_MIN
61 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
62 #endif
63
64 #ifdef CONFIG_MODEM_SUPPORT
65 int do_mdm_init = 0;
66 extern void mdm_init(void); /* defined in board.c */
67 #endif
68
69 /***************************************************************************
70  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
71  * returns: 0 -  no key string, allow autoboot 1 - got key string, abort
72  */
73 #if defined(CONFIG_BOOTDELAY)
74 # if defined(CONFIG_AUTOBOOT_KEYED)
75 static int abortboot_keyed(int bootdelay)
76 {
77         int abort = 0;
78         uint64_t etime = endtick(bootdelay);
79         struct {
80                 char* str;
81                 u_int len;
82                 int retry;
83         }
84         delaykey [] = {
85                 { str: getenv ("bootdelaykey"),  retry: 1 },
86                 { str: getenv ("bootdelaykey2"), retry: 1 },
87                 { str: getenv ("bootstopkey"),   retry: 0 },
88                 { str: getenv ("bootstopkey2"),  retry: 0 },
89         };
90
91         char presskey [MAX_DELAY_STOP_STR];
92         u_int presskey_len = 0;
93         u_int presskey_max = 0;
94         u_int i;
95
96 #ifndef CONFIG_ZERO_BOOTDELAY_CHECK
97         if (bootdelay == 0)
98                 return 0;
99 #endif
100
101 #  ifdef CONFIG_AUTOBOOT_PROMPT
102         printf(CONFIG_AUTOBOOT_PROMPT);
103 #  endif
104
105 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
106         if (delaykey[0].str == NULL)
107                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
108 #  endif
109 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
110         if (delaykey[1].str == NULL)
111                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
112 #  endif
113 #  ifdef CONFIG_AUTOBOOT_STOP_STR
114         if (delaykey[2].str == NULL)
115                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
116 #  endif
117 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
118         if (delaykey[3].str == NULL)
119                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
120 #  endif
121
122         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
123                 delaykey[i].len = delaykey[i].str == NULL ?
124                                     0 : strlen (delaykey[i].str);
125                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
126                                     MAX_DELAY_STOP_STR : delaykey[i].len;
127
128                 presskey_max = presskey_max > delaykey[i].len ?
129                                     presskey_max : delaykey[i].len;
130
131                 debug_bootkeys("%s key:<%s>\n",
132                                delaykey[i].retry ? "delay" : "stop",
133                                delaykey[i].str ? delaykey[i].str : "NULL");
134         }
135
136         /* In order to keep up with incoming data, check timeout only
137          * when catch up.
138          */
139         do {
140                 if (tstc()) {
141                         if (presskey_len < presskey_max) {
142                                 presskey [presskey_len ++] = getc();
143                         }
144                         else {
145                                 for (i = 0; i < presskey_max - 1; i ++)
146                                         presskey [i] = presskey [i + 1];
147
148                                 presskey [i] = getc();
149                         }
150                 }
151
152                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
153                         if (delaykey[i].len > 0 &&
154                             presskey_len >= delaykey[i].len &&
155                             memcmp (presskey + presskey_len - delaykey[i].len,
156                                     delaykey[i].str,
157                                     delaykey[i].len) == 0) {
158                                 debug_bootkeys("got %skey\n",
159                                                delaykey[i].retry ? "delay" :
160                                                "stop");
161
162 #  ifdef CONFIG_BOOT_RETRY_TIME
163                                 /* don't retry auto boot */
164                                 if (! delaykey[i].retry)
165                                         retry_time = -1;
166 #  endif
167                                 abort = 1;
168                         }
169                 }
170         } while (!abort && get_ticks() <= etime);
171
172         if (!abort)
173                 debug_bootkeys("key timeout\n");
174
175 #ifdef CONFIG_SILENT_CONSOLE
176         if (abort)
177                 gd->flags &= ~GD_FLG_SILENT;
178 #endif
179
180         return abort;
181 }
182
183 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
184
185 #ifdef CONFIG_MENUKEY
186 static int menukey = 0;
187 #endif
188
189 static int abortboot_normal(int bootdelay)
190 {
191         int abort = 0;
192         unsigned long ts;
193
194 #ifdef CONFIG_MENUPROMPT
195         printf(CONFIG_MENUPROMPT);
196 #else
197         if (bootdelay >= 0)
198                 printf("Hit any key to stop autoboot: %2d ", bootdelay);
199 #endif
200
201 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
202         /*
203          * Check if key already pressed
204          * Don't check if bootdelay < 0
205          */
206         if (bootdelay >= 0) {
207                 if (tstc()) {   /* we got a key press   */
208                         (void) getc();  /* consume input        */
209                         puts ("\b\b\b 0");
210                         abort = 1;      /* don't auto boot      */
211                 }
212         }
213 #endif
214
215         while ((bootdelay > 0) && (!abort)) {
216                 --bootdelay;
217                 /* delay 1000 ms */
218                 ts = get_timer(0);
219                 do {
220                         if (tstc()) {   /* we got a key press   */
221                                 abort  = 1;     /* don't auto boot      */
222                                 bootdelay = 0;  /* no more delay        */
223 # ifdef CONFIG_MENUKEY
224                                 menukey = getc();
225 # else
226                                 (void) getc();  /* consume input        */
227 # endif
228                                 break;
229                         }
230                         udelay(10000);
231                 } while (!abort && get_timer(ts) < 1000);
232
233                 printf("\b\b\b%2d ", bootdelay);
234         }
235
236         putc('\n');
237
238 #ifdef CONFIG_SILENT_CONSOLE
239         if (abort)
240                 gd->flags &= ~GD_FLG_SILENT;
241 #endif
242
243         return abort;
244 }
245 # endif /* CONFIG_AUTOBOOT_KEYED */
246
247 static int abortboot(int bootdelay)
248 {
249 #ifdef CONFIG_AUTOBOOT_KEYED
250         return abortboot_keyed(bootdelay);
251 #else
252         return abortboot_normal(bootdelay);
253 #endif
254 }
255 #endif  /* CONFIG_BOOTDELAY */
256
257 /*
258  * Runs the given boot command securely.  Specifically:
259  * - Doesn't run the command with the shell (run_command or parse_string_outer),
260  *   since that's a lot of code surface that an attacker might exploit.
261  *   Because of this, we don't do any argument parsing--the secure boot command
262  *   has to be a full-fledged u-boot command.
263  * - Doesn't check for keypresses before booting, since that could be a
264  *   security hole; also disables Ctrl-C.
265  * - Doesn't allow the command to return.
266  *
267  * Upon any failures, this function will drop into an infinite loop after
268  * printing the error message to console.
269  */
270
271 #if defined(CONFIG_BOOTDELAY) && defined(CONFIG_OF_CONTROL)
272 static void secure_boot_cmd(char *cmd)
273 {
274         cmd_tbl_t *cmdtp;
275         int rc;
276
277         if (!cmd) {
278                 printf("## Error: Secure boot command not specified\n");
279                 goto err;
280         }
281
282         /* Disable Ctrl-C just in case some command is used that checks it. */
283         disable_ctrlc(1);
284
285         /* Find the command directly. */
286         cmdtp = find_cmd(cmd);
287         if (!cmdtp) {
288                 printf("## Error: \"%s\" not defined\n", cmd);
289                 goto err;
290         }
291
292         /* Run the command, forcing no flags and faking argc and argv. */
293         rc = (cmdtp->cmd)(cmdtp, 0, 1, &cmd);
294
295         /* Shouldn't ever return from boot command. */
296         printf("## Error: \"%s\" returned (code %d)\n", cmd, rc);
297
298 err:
299         /*
300          * Not a whole lot to do here.  Rebooting won't help much, since we'll
301          * just end up right back here.  Just loop.
302          */
303         hang();
304 }
305
306 static void process_fdt_options(const void *blob)
307 {
308         ulong addr;
309
310         /* Add an env variable to point to a kernel payload, if available */
311         addr = fdtdec_get_config_int(gd->fdt_blob, "kernel-offset", 0);
312         if (addr)
313                 setenv_addr("kernaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
314
315         /* Add an env variable to point to a root disk, if available */
316         addr = fdtdec_get_config_int(gd->fdt_blob, "rootdisk-offset", 0);
317         if (addr)
318                 setenv_addr("rootaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
319 }
320 #endif /* CONFIG_OF_CONTROL */
321
322 #ifdef CONFIG_BOOTDELAY
323 static void process_boot_delay(void)
324 {
325 #ifdef CONFIG_OF_CONTROL
326         char *env;
327 #endif
328         char *s;
329         int bootdelay;
330 #ifdef CONFIG_BOOTCOUNT_LIMIT
331         unsigned long bootcount = 0;
332         unsigned long bootlimit = 0;
333 #endif /* CONFIG_BOOTCOUNT_LIMIT */
334
335 #ifdef CONFIG_BOOTCOUNT_LIMIT
336         bootcount = bootcount_load();
337         bootcount++;
338         bootcount_store (bootcount);
339         setenv_ulong("bootcount", bootcount);
340         bootlimit = getenv_ulong("bootlimit", 10, 0);
341 #endif /* CONFIG_BOOTCOUNT_LIMIT */
342
343         s = getenv ("bootdelay");
344         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
345
346 #ifdef CONFIG_OF_CONTROL
347         bootdelay = fdtdec_get_config_int(gd->fdt_blob, "bootdelay",
348                         bootdelay);
349 #endif
350
351         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
352
353 #if defined(CONFIG_MENU_SHOW)
354         bootdelay = menu_show(bootdelay);
355 #endif
356 # ifdef CONFIG_BOOT_RETRY_TIME
357         init_cmd_timeout ();
358 # endif /* CONFIG_BOOT_RETRY_TIME */
359
360 #ifdef CONFIG_POST
361         if (gd->flags & GD_FLG_POSTFAIL) {
362                 s = getenv("failbootcmd");
363         }
364         else
365 #endif /* CONFIG_POST */
366 #ifdef CONFIG_BOOTCOUNT_LIMIT
367         if (bootlimit && (bootcount > bootlimit)) {
368                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
369                         (unsigned)bootlimit);
370                 s = getenv ("altbootcmd");
371         }
372         else
373 #endif /* CONFIG_BOOTCOUNT_LIMIT */
374                 s = getenv ("bootcmd");
375 #ifdef CONFIG_OF_CONTROL
376         /* Allow the fdt to override the boot command */
377         env = fdtdec_get_config_string(gd->fdt_blob, "bootcmd");
378         if (env)
379                 s = env;
380
381         process_fdt_options(gd->fdt_blob);
382
383         /*
384          * If the bootsecure option was chosen, use secure_boot_cmd().
385          * Always use 'env' in this case, since bootsecure requres that the
386          * bootcmd was specified in the FDT too.
387          */
388         if (fdtdec_get_config_int(gd->fdt_blob, "bootsecure", 0))
389                 secure_boot_cmd(env);
390
391 #endif /* CONFIG_OF_CONTROL */
392
393         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
394
395         if (bootdelay != -1 && s && !abortboot(bootdelay)) {
396 #if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC)
397                 int prev = disable_ctrlc(1);    /* disable Control C checking */
398 #endif
399
400                 run_command_list(s, -1, 0);
401
402 #if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC)
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                         run_command_list(s, -1, 0);
412         }
413 #endif /* CONFIG_MENUKEY */
414 }
415 #endif /* CONFIG_BOOTDELAY */
416
417 void main_loop(void)
418 {
419 #ifndef CONFIG_SYS_HUSH_PARSER
420         static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
421         int len;
422         int rc = 1;
423         int flag;
424 #endif
425 #ifdef CONFIG_PREBOOT
426         char *p;
427 #endif
428
429         bootstage_mark_name(BOOTSTAGE_ID_MAIN_LOOP, "main_loop");
430
431 #ifndef CONFIG_SYS_GENERIC_BOARD
432         puts("Warning: Your board does not use generic board. Please read\n");
433         puts("doc/README.generic-board and take action. Boards not\n");
434         puts("upgraded by the late 2014 may break or be removed.\n");
435 #endif
436
437 #ifdef CONFIG_MODEM_SUPPORT
438         debug("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
439         if (do_mdm_init) {
440                 char *str = strdup(getenv("mdm_cmd"));
441                 setenv("preboot", str);  /* set or delete definition */
442                 if (str != NULL)
443                         free(str);
444                 mdm_init(); /* wait for modem connection */
445         }
446 #endif  /* CONFIG_MODEM_SUPPORT */
447
448 #ifdef CONFIG_VERSION_VARIABLE
449         {
450                 setenv("ver", version_string);  /* set version variable */
451         }
452 #endif /* CONFIG_VERSION_VARIABLE */
453
454 #ifdef CONFIG_SYS_HUSH_PARSER
455         u_boot_hush_start();
456 #endif
457
458 #if defined(CONFIG_HUSH_INIT_VAR)
459         hush_init_var();
460 #endif
461
462 #ifdef CONFIG_PREBOOT
463         p = getenv("preboot");
464         if (p != NULL) {
465 # ifdef CONFIG_AUTOBOOT_KEYED
466                 int prev = disable_ctrlc(1);    /* disable Control C checking */
467 # endif
468
469                 run_command_list(p, -1, 0);
470
471 # ifdef CONFIG_AUTOBOOT_KEYED
472                 disable_ctrlc(prev);    /* restore Control C checking */
473 # endif
474         }
475 #endif /* CONFIG_PREBOOT */
476
477 #if defined(CONFIG_UPDATE_TFTP)
478         update_tftp(0UL);
479 #endif /* CONFIG_UPDATE_TFTP */
480
481 #ifdef CONFIG_BOOTDELAY
482         process_boot_delay();
483 #endif
484         /*
485          * Main Loop for Monitor Command Processing
486          */
487 #ifdef CONFIG_SYS_HUSH_PARSER
488         parse_file_outer();
489         /* This point is never reached */
490         for (;;);
491 #else
492         for (;;) {
493 #ifdef CONFIG_BOOT_RETRY_TIME
494                 if (rc >= 0) {
495                         /* Saw enough of a valid command to
496                          * restart the timeout.
497                          */
498                         reset_cmd_timeout();
499                 }
500 #endif
501                 len = readline (CONFIG_SYS_PROMPT);
502
503                 flag = 0;       /* assume no special flags for now */
504                 if (len > 0)
505                         strcpy (lastcommand, console_buffer);
506                 else if (len == 0)
507                         flag |= CMD_FLAG_REPEAT;
508 #ifdef CONFIG_BOOT_RETRY_TIME
509                 else if (len == -2) {
510                         /* -2 means timed out, retry autoboot
511                          */
512                         puts ("\nTimed out waiting for command\n");
513 # ifdef CONFIG_RESET_TO_RETRY
514                         /* Reinit board to run initialization code again */
515                         do_reset (NULL, 0, 0, NULL);
516 # else
517                         return;         /* retry autoboot */
518 # endif
519                 }
520 #endif
521
522                 if (len == -1)
523                         puts ("<INTERRUPT>\n");
524                 else
525                         rc = run_command(lastcommand, flag);
526
527                 if (rc <= 0) {
528                         /* invalid command or not repeatable, forget it */
529                         lastcommand[0] = 0;
530                 }
531         }
532 #endif /*CONFIG_SYS_HUSH_PARSER*/
533 }
534
535 #ifdef CONFIG_BOOT_RETRY_TIME
536 /***************************************************************************
537  * initialize command line timeout
538  */
539 void init_cmd_timeout(void)
540 {
541         char *s = getenv ("bootretry");
542
543         if (s != NULL)
544                 retry_time = (int)simple_strtol(s, NULL, 10);
545         else
546                 retry_time =  CONFIG_BOOT_RETRY_TIME;
547
548         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
549                 retry_time = CONFIG_BOOT_RETRY_MIN;
550 }
551
552 /***************************************************************************
553  * reset command line timeout to retry_time seconds
554  */
555 void reset_cmd_timeout(void)
556 {
557         endtime = endtick(retry_time);
558 }
559 #endif
560
561 #ifdef CONFIG_CMDLINE_EDITING
562
563 /*
564  * cmdline-editing related codes from vivi.
565  * Author: Janghoon Lyu <nandy@mizi.com>
566  */
567
568 #define putnstr(str,n)  do {                    \
569                 printf ("%.*s", (int)n, str);   \
570         } while (0)
571
572 #define CTL_CH(c)               ((c) - 'a' + 1)
573 #define CTL_BACKSPACE           ('\b')
574 #define DEL                     ((char)255)
575 #define DEL7                    ((char)127)
576 #define CREAD_HIST_CHAR         ('!')
577
578 #define getcmd_putch(ch)        putc(ch)
579 #define getcmd_getch()          getc()
580 #define getcmd_cbeep()          getcmd_putch('\a')
581
582 #define HIST_MAX                20
583 #define HIST_SIZE               CONFIG_SYS_CBSIZE
584
585 static int hist_max;
586 static int hist_add_idx;
587 static int hist_cur = -1;
588 static unsigned hist_num;
589
590 static char *hist_list[HIST_MAX];
591 static char hist_lines[HIST_MAX][HIST_SIZE + 1];        /* Save room for NULL */
592
593 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
594
595 static void hist_init(void)
596 {
597         int i;
598
599         hist_max = 0;
600         hist_add_idx = 0;
601         hist_cur = -1;
602         hist_num = 0;
603
604         for (i = 0; i < HIST_MAX; i++) {
605                 hist_list[i] = hist_lines[i];
606                 hist_list[i][0] = '\0';
607         }
608 }
609
610 static void cread_add_to_hist(char *line)
611 {
612         strcpy(hist_list[hist_add_idx], line);
613
614         if (++hist_add_idx >= HIST_MAX)
615                 hist_add_idx = 0;
616
617         if (hist_add_idx > hist_max)
618                 hist_max = hist_add_idx;
619
620         hist_num++;
621 }
622
623 static char* hist_prev(void)
624 {
625         char *ret;
626         int old_cur;
627
628         if (hist_cur < 0)
629                 return NULL;
630
631         old_cur = hist_cur;
632         if (--hist_cur < 0)
633                 hist_cur = hist_max;
634
635         if (hist_cur == hist_add_idx) {
636                 hist_cur = old_cur;
637                 ret = NULL;
638         } else
639                 ret = hist_list[hist_cur];
640
641         return (ret);
642 }
643
644 static char* hist_next(void)
645 {
646         char *ret;
647
648         if (hist_cur < 0)
649                 return NULL;
650
651         if (hist_cur == hist_add_idx)
652                 return NULL;
653
654         if (++hist_cur > hist_max)
655                 hist_cur = 0;
656
657         if (hist_cur == hist_add_idx) {
658                 ret = "";
659         } else
660                 ret = hist_list[hist_cur];
661
662         return (ret);
663 }
664
665 #ifndef CONFIG_CMDLINE_EDITING
666 static void cread_print_hist_list(void)
667 {
668         int i;
669         unsigned long n;
670
671         n = hist_num - hist_max;
672
673         i = hist_add_idx + 1;
674         while (1) {
675                 if (i > hist_max)
676                         i = 0;
677                 if (i == hist_add_idx)
678                         break;
679                 printf("%s\n", hist_list[i]);
680                 n++;
681                 i++;
682         }
683 }
684 #endif /* CONFIG_CMDLINE_EDITING */
685
686 #define BEGINNING_OF_LINE() {                   \
687         while (num) {                           \
688                 getcmd_putch(CTL_BACKSPACE);    \
689                 num--;                          \
690         }                                       \
691 }
692
693 #define ERASE_TO_EOL() {                                \
694         if (num < eol_num) {                            \
695                 printf("%*s", (int)(eol_num - num), ""); \
696                 do {                                    \
697                         getcmd_putch(CTL_BACKSPACE);    \
698                 } while (--eol_num > num);              \
699         }                                               \
700 }
701
702 #define REFRESH_TO_EOL() {                      \
703         if (num < eol_num) {                    \
704                 wlen = eol_num - num;           \
705                 putnstr(buf + num, wlen);       \
706                 num = eol_num;                  \
707         }                                       \
708 }
709
710 static void cread_add_char(char ichar, int insert, unsigned long *num,
711                unsigned long *eol_num, char *buf, unsigned long len)
712 {
713         unsigned long wlen;
714
715         /* room ??? */
716         if (insert || *num == *eol_num) {
717                 if (*eol_num > len - 1) {
718                         getcmd_cbeep();
719                         return;
720                 }
721                 (*eol_num)++;
722         }
723
724         if (insert) {
725                 wlen = *eol_num - *num;
726                 if (wlen > 1) {
727                         memmove(&buf[*num+1], &buf[*num], wlen-1);
728                 }
729
730                 buf[*num] = ichar;
731                 putnstr(buf + *num, wlen);
732                 (*num)++;
733                 while (--wlen) {
734                         getcmd_putch(CTL_BACKSPACE);
735                 }
736         } else {
737                 /* echo the character */
738                 wlen = 1;
739                 buf[*num] = ichar;
740                 putnstr(buf + *num, wlen);
741                 (*num)++;
742         }
743 }
744
745 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
746               unsigned long *eol_num, char *buf, unsigned long len)
747 {
748         while (strsize--) {
749                 cread_add_char(*str, insert, num, eol_num, buf, len);
750                 str++;
751         }
752 }
753
754 static int cread_line(const char *const prompt, char *buf, unsigned int *len,
755                 int timeout)
756 {
757         unsigned long num = 0;
758         unsigned long eol_num = 0;
759         unsigned long wlen;
760         char ichar;
761         int insert = 1;
762         int esc_len = 0;
763         char esc_save[8];
764         int init_len = strlen(buf);
765         int first = 1;
766
767         if (init_len)
768                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
769
770         while (1) {
771 #ifdef CONFIG_BOOT_RETRY_TIME
772                 while (!tstc()) {       /* while no incoming data */
773                         if (retry_time >= 0 && get_ticks() > endtime)
774                                 return (-2);    /* timed out */
775                         WATCHDOG_RESET();
776                 }
777 #endif
778                 if (first && timeout) {
779                         uint64_t etime = endtick(timeout);
780
781                         while (!tstc()) {       /* while no incoming data */
782                                 if (get_ticks() >= etime)
783                                         return -2;      /* timed out */
784                                 WATCHDOG_RESET();
785                         }
786                         first = 0;
787                 }
788
789                 ichar = getcmd_getch();
790
791                 if ((ichar == '\n') || (ichar == '\r')) {
792                         putc('\n');
793                         break;
794                 }
795
796                 /*
797                  * handle standard linux xterm esc sequences for arrow key, etc.
798                  */
799                 if (esc_len != 0) {
800                         if (esc_len == 1) {
801                                 if (ichar == '[') {
802                                         esc_save[esc_len] = ichar;
803                                         esc_len = 2;
804                                 } else {
805                                         cread_add_str(esc_save, esc_len, insert,
806                                                       &num, &eol_num, buf, *len);
807                                         esc_len = 0;
808                                 }
809                                 continue;
810                         }
811
812                         switch (ichar) {
813
814                         case 'D':       /* <- key */
815                                 ichar = CTL_CH('b');
816                                 esc_len = 0;
817                                 break;
818                         case 'C':       /* -> key */
819                                 ichar = CTL_CH('f');
820                                 esc_len = 0;
821                                 break;  /* pass off to ^F handler */
822                         case 'H':       /* Home key */
823                                 ichar = CTL_CH('a');
824                                 esc_len = 0;
825                                 break;  /* pass off to ^A handler */
826                         case 'A':       /* up arrow */
827                                 ichar = CTL_CH('p');
828                                 esc_len = 0;
829                                 break;  /* pass off to ^P handler */
830                         case 'B':       /* down arrow */
831                                 ichar = CTL_CH('n');
832                                 esc_len = 0;
833                                 break;  /* pass off to ^N handler */
834                         default:
835                                 esc_save[esc_len++] = ichar;
836                                 cread_add_str(esc_save, esc_len, insert,
837                                               &num, &eol_num, buf, *len);
838                                 esc_len = 0;
839                                 continue;
840                         }
841                 }
842
843                 switch (ichar) {
844                 case 0x1b:
845                         if (esc_len == 0) {
846                                 esc_save[esc_len] = ichar;
847                                 esc_len = 1;
848                         } else {
849                                 puts("impossible condition #876\n");
850                                 esc_len = 0;
851                         }
852                         break;
853
854                 case CTL_CH('a'):
855                         BEGINNING_OF_LINE();
856                         break;
857                 case CTL_CH('c'):       /* ^C - break */
858                         *buf = '\0';    /* discard input */
859                         return (-1);
860                 case CTL_CH('f'):
861                         if (num < eol_num) {
862                                 getcmd_putch(buf[num]);
863                                 num++;
864                         }
865                         break;
866                 case CTL_CH('b'):
867                         if (num) {
868                                 getcmd_putch(CTL_BACKSPACE);
869                                 num--;
870                         }
871                         break;
872                 case CTL_CH('d'):
873                         if (num < eol_num) {
874                                 wlen = eol_num - num - 1;
875                                 if (wlen) {
876                                         memmove(&buf[num], &buf[num+1], wlen);
877                                         putnstr(buf + num, wlen);
878                                 }
879
880                                 getcmd_putch(' ');
881                                 do {
882                                         getcmd_putch(CTL_BACKSPACE);
883                                 } while (wlen--);
884                                 eol_num--;
885                         }
886                         break;
887                 case CTL_CH('k'):
888                         ERASE_TO_EOL();
889                         break;
890                 case CTL_CH('e'):
891                         REFRESH_TO_EOL();
892                         break;
893                 case CTL_CH('o'):
894                         insert = !insert;
895                         break;
896                 case CTL_CH('x'):
897                 case CTL_CH('u'):
898                         BEGINNING_OF_LINE();
899                         ERASE_TO_EOL();
900                         break;
901                 case DEL:
902                 case DEL7:
903                 case 8:
904                         if (num) {
905                                 wlen = eol_num - num;
906                                 num--;
907                                 memmove(&buf[num], &buf[num+1], wlen);
908                                 getcmd_putch(CTL_BACKSPACE);
909                                 putnstr(buf + num, wlen);
910                                 getcmd_putch(' ');
911                                 do {
912                                         getcmd_putch(CTL_BACKSPACE);
913                                 } while (wlen--);
914                                 eol_num--;
915                         }
916                         break;
917                 case CTL_CH('p'):
918                 case CTL_CH('n'):
919                 {
920                         char * hline;
921
922                         esc_len = 0;
923
924                         if (ichar == CTL_CH('p'))
925                                 hline = hist_prev();
926                         else
927                                 hline = hist_next();
928
929                         if (!hline) {
930                                 getcmd_cbeep();
931                                 continue;
932                         }
933
934                         /* nuke the current line */
935                         /* first, go home */
936                         BEGINNING_OF_LINE();
937
938                         /* erase to end of line */
939                         ERASE_TO_EOL();
940
941                         /* copy new line into place and display */
942                         strcpy(buf, hline);
943                         eol_num = strlen(buf);
944                         REFRESH_TO_EOL();
945                         continue;
946                 }
947 #ifdef CONFIG_AUTO_COMPLETE
948                 case '\t': {
949                         int num2, col;
950
951                         /* do not autocomplete when in the middle */
952                         if (num < eol_num) {
953                                 getcmd_cbeep();
954                                 break;
955                         }
956
957                         buf[num] = '\0';
958                         col = strlen(prompt) + eol_num;
959                         num2 = num;
960                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
961                                 col = num2 - num;
962                                 num += col;
963                                 eol_num += col;
964                         }
965                         break;
966                 }
967 #endif
968                 default:
969                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
970                         break;
971                 }
972         }
973         *len = eol_num;
974         buf[eol_num] = '\0';    /* lose the newline */
975
976         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
977                 cread_add_to_hist(buf);
978         hist_cur = hist_add_idx;
979
980         return 0;
981 }
982
983 #endif /* CONFIG_CMDLINE_EDITING */
984
985 /****************************************************************************/
986
987 /*
988  * Prompt for input and read a line.
989  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
990  * time out when time goes past endtime (timebase time in ticks).
991  * Return:      number of read characters
992  *              -1 if break
993  *              -2 if timed out
994  */
995 int readline (const char *const prompt)
996 {
997         /*
998          * If console_buffer isn't 0-length the user will be prompted to modify
999          * it instead of entering it from scratch as desired.
1000          */
1001         console_buffer[0] = '\0';
1002
1003         return readline_into_buffer(prompt, console_buffer, 0);
1004 }
1005
1006
1007 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
1008 {
1009         char *p = buffer;
1010 #ifdef CONFIG_CMDLINE_EDITING
1011         unsigned int len = CONFIG_SYS_CBSIZE;
1012         int rc;
1013         static int initted = 0;
1014
1015         /*
1016          * History uses a global array which is not
1017          * writable until after relocation to RAM.
1018          * Revert to non-history version if still
1019          * running from flash.
1020          */
1021         if (gd->flags & GD_FLG_RELOC) {
1022                 if (!initted) {
1023                         hist_init();
1024                         initted = 1;
1025                 }
1026
1027                 if (prompt)
1028                         puts (prompt);
1029
1030                 rc = cread_line(prompt, p, &len, timeout);
1031                 return rc < 0 ? rc : len;
1032
1033         } else {
1034 #endif  /* CONFIG_CMDLINE_EDITING */
1035         char * p_buf = p;
1036         int     n = 0;                          /* buffer index         */
1037         int     plen = 0;                       /* prompt length        */
1038         int     col;                            /* output column cnt    */
1039         char    c;
1040
1041         /* print prompt */
1042         if (prompt) {
1043                 plen = strlen (prompt);
1044                 puts (prompt);
1045         }
1046         col = plen;
1047
1048         for (;;) {
1049 #ifdef CONFIG_BOOT_RETRY_TIME
1050                 while (!tstc()) {       /* while no incoming data */
1051                         if (retry_time >= 0 && get_ticks() > endtime)
1052                                 return (-2);    /* timed out */
1053                         WATCHDOG_RESET();
1054                 }
1055 #endif
1056                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
1057
1058 #ifdef CONFIG_SHOW_ACTIVITY
1059                 while (!tstc()) {
1060                         show_activity(0);
1061                         WATCHDOG_RESET();
1062                 }
1063 #endif
1064                 c = getc();
1065
1066                 /*
1067                  * Special character handling
1068                  */
1069                 switch (c) {
1070                 case '\r':                      /* Enter                */
1071                 case '\n':
1072                         *p = '\0';
1073                         puts ("\r\n");
1074                         return p - p_buf;
1075
1076                 case '\0':                      /* nul                  */
1077                         continue;
1078
1079                 case 0x03:                      /* ^C - break           */
1080                         p_buf[0] = '\0';        /* discard input */
1081                         return -1;
1082
1083                 case 0x15:                      /* ^U - erase line      */
1084                         while (col > plen) {
1085                                 puts (erase_seq);
1086                                 --col;
1087                         }
1088                         p = p_buf;
1089                         n = 0;
1090                         continue;
1091
1092                 case 0x17:                      /* ^W - erase word      */
1093                         p=delete_char(p_buf, p, &col, &n, plen);
1094                         while ((n > 0) && (*p != ' ')) {
1095                                 p=delete_char(p_buf, p, &col, &n, plen);
1096                         }
1097                         continue;
1098
1099                 case 0x08:                      /* ^H  - backspace      */
1100                 case 0x7F:                      /* DEL - backspace      */
1101                         p=delete_char(p_buf, p, &col, &n, plen);
1102                         continue;
1103
1104                 default:
1105                         /*
1106                          * Must be a normal character then
1107                          */
1108                         if (n < CONFIG_SYS_CBSIZE-2) {
1109                                 if (c == '\t') {        /* expand TABs */
1110 #ifdef CONFIG_AUTO_COMPLETE
1111                                         /* if auto completion triggered just continue */
1112                                         *p = '\0';
1113                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1114                                                 p = p_buf + n;  /* reset */
1115                                                 continue;
1116                                         }
1117 #endif
1118                                         puts (tab_seq+(col&07));
1119                                         col += 8 - (col&07);
1120                                 } else {
1121                                         char buf[2];
1122
1123                                         /*
1124                                          * Echo input using puts() to force an
1125                                          * LCD flush if we are using an LCD
1126                                          */
1127                                         ++col;
1128                                         buf[0] = c;
1129                                         buf[1] = '\0';
1130                                         puts(buf);
1131                                 }
1132                                 *p++ = c;
1133                                 ++n;
1134                         } else {                        /* Buffer full          */
1135                                 putc ('\a');
1136                         }
1137                 }
1138         }
1139 #ifdef CONFIG_CMDLINE_EDITING
1140         }
1141 #endif
1142 }
1143
1144 /****************************************************************************/
1145
1146 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1147 {
1148         char *s;
1149
1150         if (*np == 0) {
1151                 return (p);
1152         }
1153
1154         if (*(--p) == '\t') {                   /* will retype the whole line   */
1155                 while (*colp > plen) {
1156                         puts (erase_seq);
1157                         (*colp)--;
1158                 }
1159                 for (s=buffer; s<p; ++s) {
1160                         if (*s == '\t') {
1161                                 puts (tab_seq+((*colp) & 07));
1162                                 *colp += 8 - ((*colp) & 07);
1163                         } else {
1164                                 ++(*colp);
1165                                 putc (*s);
1166                         }
1167                 }
1168         } else {
1169                 puts (erase_seq);
1170                 (*colp)--;
1171         }
1172         (*np)--;
1173         return (p);
1174 }
1175
1176 /****************************************************************************/
1177
1178 int parse_line (char *line, char *argv[])
1179 {
1180         int nargs = 0;
1181
1182         debug_parser("parse_line: \"%s\"\n", line);
1183         while (nargs < CONFIG_SYS_MAXARGS) {
1184
1185                 /* skip any white space */
1186                 while (isblank(*line))
1187                         ++line;
1188
1189                 if (*line == '\0') {    /* end of line, no more args    */
1190                         argv[nargs] = NULL;
1191                         debug_parser("parse_line: nargs=%d\n", nargs);
1192                         return nargs;
1193                 }
1194
1195                 argv[nargs++] = line;   /* begin of argument string     */
1196
1197                 /* find end of string */
1198                 while (*line && !isblank(*line))
1199                         ++line;
1200
1201                 if (*line == '\0') {    /* end of line, no more args    */
1202                         argv[nargs] = NULL;
1203                         debug_parser("parse_line: nargs=%d\n", nargs);
1204                         return nargs;
1205                 }
1206
1207                 *line++ = '\0';         /* terminate current arg         */
1208         }
1209
1210         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1211
1212         debug_parser("parse_line: nargs=%d\n", nargs);
1213         return (nargs);
1214 }
1215
1216 /****************************************************************************/
1217
1218 #ifndef CONFIG_SYS_HUSH_PARSER
1219 static void process_macros (const char *input, char *output)
1220 {
1221         char c, prev;
1222         const char *varname_start = NULL;
1223         int inputcnt = strlen (input);
1224         int outputcnt = CONFIG_SYS_CBSIZE;
1225         int state = 0;          /* 0 = waiting for '$'  */
1226
1227         /* 1 = waiting for '(' or '{' */
1228         /* 2 = waiting for ')' or '}' */
1229         /* 3 = waiting for '''  */
1230         char *output_start = output;
1231
1232         debug_parser("[PROCESS_MACROS] INPUT len %zd: \"%s\"\n", strlen(input),
1233                      input);
1234
1235         prev = '\0';            /* previous character   */
1236
1237         while (inputcnt && outputcnt) {
1238                 c = *input++;
1239                 inputcnt--;
1240
1241                 if (state != 3) {
1242                         /* remove one level of escape characters */
1243                         if ((c == '\\') && (prev != '\\')) {
1244                                 if (inputcnt-- == 0)
1245                                         break;
1246                                 prev = c;
1247                                 c = *input++;
1248                         }
1249                 }
1250
1251                 switch (state) {
1252                 case 0: /* Waiting for (unescaped) $    */
1253                         if ((c == '\'') && (prev != '\\')) {
1254                                 state = 3;
1255                                 break;
1256                         }
1257                         if ((c == '$') && (prev != '\\')) {
1258                                 state++;
1259                         } else {
1260                                 *(output++) = c;
1261                                 outputcnt--;
1262                         }
1263                         break;
1264                 case 1: /* Waiting for (        */
1265                         if (c == '(' || c == '{') {
1266                                 state++;
1267                                 varname_start = input;
1268                         } else {
1269                                 state = 0;
1270                                 *(output++) = '$';
1271                                 outputcnt--;
1272
1273                                 if (outputcnt) {
1274                                         *(output++) = c;
1275                                         outputcnt--;
1276                                 }
1277                         }
1278                         break;
1279                 case 2: /* Waiting for )        */
1280                         if (c == ')' || c == '}') {
1281                                 int i;
1282                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1283                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1284
1285                                 /* Get the varname */
1286                                 for (i = 0; i < envcnt; i++) {
1287                                         envname[i] = varname_start[i];
1288                                 }
1289                                 envname[i] = 0;
1290
1291                                 /* Get its value */
1292                                 envval = getenv (envname);
1293
1294                                 /* Copy into the line if it exists */
1295                                 if (envval != NULL)
1296                                         while ((*envval) && outputcnt) {
1297                                                 *(output++) = *(envval++);
1298                                                 outputcnt--;
1299                                         }
1300                                 /* Look for another '$' */
1301                                 state = 0;
1302                         }
1303                         break;
1304                 case 3: /* Waiting for '        */
1305                         if ((c == '\'') && (prev != '\\')) {
1306                                 state = 0;
1307                         } else {
1308                                 *(output++) = c;
1309                                 outputcnt--;
1310                         }
1311                         break;
1312                 }
1313                 prev = c;
1314         }
1315
1316         if (outputcnt)
1317                 *output = 0;
1318         else
1319                 *(output - 1) = 0;
1320
1321         debug_parser("[PROCESS_MACROS] OUTPUT len %zd: \"%s\"\n",
1322                      strlen(output_start), output_start);
1323 }
1324
1325 /****************************************************************************
1326  * returns:
1327  *      1  - command executed, repeatable
1328  *      0  - command executed but not repeatable, interrupted commands are
1329  *           always considered not repeatable
1330  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1331  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1332  *           considered unrecognized)
1333  *
1334  * WARNING:
1335  *
1336  * We must create a temporary copy of the command since the command we get
1337  * may be the result from getenv(), which returns a pointer directly to
1338  * the environment data, which may change magicly when the command we run
1339  * creates or modifies environment variables (like "bootp" does).
1340  */
1341 static int builtin_run_command(const char *cmd, int flag)
1342 {
1343         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1344         char *token;                    /* start of token in cmdbuf     */
1345         char *sep;                      /* end of token (separator) in cmdbuf */
1346         char finaltoken[CONFIG_SYS_CBSIZE];
1347         char *str = cmdbuf;
1348         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1349         int argc, inquotes;
1350         int repeatable = 1;
1351         int rc = 0;
1352
1353         debug_parser("[RUN_COMMAND] cmd[%p]=\"", cmd);
1354         if (DEBUG_PARSER) {
1355                 /* use puts - string may be loooong */
1356                 puts(cmd ? cmd : "NULL");
1357                 puts("\"\n");
1358         }
1359         clear_ctrlc();          /* forget any previous Control C */
1360
1361         if (!cmd || !*cmd) {
1362                 return -1;      /* empty command */
1363         }
1364
1365         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1366                 puts ("## Command too long!\n");
1367                 return -1;
1368         }
1369
1370         strcpy (cmdbuf, cmd);
1371
1372         /* Process separators and check for invalid
1373          * repeatable commands
1374          */
1375
1376         debug_parser("[PROCESS_SEPARATORS] %s\n", cmd);
1377         while (*str) {
1378
1379                 /*
1380                  * Find separator, or string end
1381                  * Allow simple escape of ';' by writing "\;"
1382                  */
1383                 for (inquotes = 0, sep = str; *sep; sep++) {
1384                         if ((*sep=='\'') &&
1385                             (*(sep-1) != '\\'))
1386                                 inquotes=!inquotes;
1387
1388                         if (!inquotes &&
1389                             (*sep == ';') &&    /* separator            */
1390                             ( sep != str) &&    /* past string start    */
1391                             (*(sep-1) != '\\')) /* and NOT escaped      */
1392                                 break;
1393                 }
1394
1395                 /*
1396                  * Limit the token to data between separators
1397                  */
1398                 token = str;
1399                 if (*sep) {
1400                         str = sep + 1;  /* start of command for next pass */
1401                         *sep = '\0';
1402                 }
1403                 else
1404                         str = sep;      /* no more commands for next pass */
1405                 debug_parser("token: \"%s\"\n", token);
1406
1407                 /* find macros in this token and replace them */
1408                 process_macros (token, finaltoken);
1409
1410                 /* Extract arguments */
1411                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1412                         rc = -1;        /* no command at all */
1413                         continue;
1414                 }
1415
1416                 if (cmd_process(flag, argc, argv, &repeatable, NULL))
1417                         rc = -1;
1418
1419                 /* Did the user stop this? */
1420                 if (had_ctrlc ())
1421                         return -1;      /* if stopped then not repeatable */
1422         }
1423
1424         return rc ? rc : repeatable;
1425 }
1426 #endif
1427
1428 /*
1429  * Run a command using the selected parser.
1430  *
1431  * @param cmd   Command to run
1432  * @param flag  Execution flags (CMD_FLAG_...)
1433  * @return 0 on success, or != 0 on error.
1434  */
1435 int run_command(const char *cmd, int flag)
1436 {
1437 #ifndef CONFIG_SYS_HUSH_PARSER
1438         /*
1439          * builtin_run_command can return 0 or 1 for success, so clean up
1440          * its result.
1441          */
1442         if (builtin_run_command(cmd, flag) == -1)
1443                 return 1;
1444
1445         return 0;
1446 #else
1447         return parse_string_outer(cmd,
1448                         FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
1449 #endif
1450 }
1451
1452 #ifndef CONFIG_SYS_HUSH_PARSER
1453 /**
1454  * Execute a list of command separated by ; or \n using the built-in parser.
1455  *
1456  * This function cannot take a const char * for the command, since if it
1457  * finds newlines in the string, it replaces them with \0.
1458  *
1459  * @param cmd   String containing list of commands
1460  * @param flag  Execution flags (CMD_FLAG_...)
1461  * @return 0 on success, or != 0 on error.
1462  */
1463 static int builtin_run_command_list(char *cmd, int flag)
1464 {
1465         char *line, *next;
1466         int rcode = 0;
1467
1468         /*
1469          * Break into individual lines, and execute each line; terminate on
1470          * error.
1471          */
1472         line = next = cmd;
1473         while (*next) {
1474                 if (*next == '\n') {
1475                         *next = '\0';
1476                         /* run only non-empty commands */
1477                         if (*line) {
1478                                 debug("** exec: \"%s\"\n", line);
1479                                 if (builtin_run_command(line, 0) < 0) {
1480                                         rcode = 1;
1481                                         break;
1482                                 }
1483                         }
1484                         line = next + 1;
1485                 }
1486                 ++next;
1487         }
1488         if (rcode == 0 && *line)
1489                 rcode = (builtin_run_command(line, 0) >= 0);
1490
1491         return rcode;
1492 }
1493 #endif
1494
1495 int run_command_list(const char *cmd, int len, int flag)
1496 {
1497         int need_buff = 1;
1498         char *buff = (char *)cmd;       /* cast away const */
1499         int rcode = 0;
1500
1501         if (len == -1) {
1502                 len = strlen(cmd);
1503 #ifdef CONFIG_SYS_HUSH_PARSER
1504                 /* hush will never change our string */
1505                 need_buff = 0;
1506 #else
1507                 /* the built-in parser will change our string if it sees \n */
1508                 need_buff = strchr(cmd, '\n') != NULL;
1509 #endif
1510         }
1511         if (need_buff) {
1512                 buff = malloc(len + 1);
1513                 if (!buff)
1514                         return 1;
1515                 memcpy(buff, cmd, len);
1516                 buff[len] = '\0';
1517         }
1518 #ifdef CONFIG_SYS_HUSH_PARSER
1519         rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON);
1520 #else
1521         /*
1522          * This function will overwrite any \n it sees with a \0, which
1523          * is why it can't work with a const char *. Here we are making
1524          * using of internal knowledge of this function, to avoid always
1525          * doing a malloc() which is actually required only in a case that
1526          * is pretty rare.
1527          */
1528         rcode = builtin_run_command_list(buff, flag);
1529         if (need_buff)
1530                 free(buff);
1531 #endif
1532
1533         return rcode;
1534 }
1535
1536 /****************************************************************************/
1537
1538 #if defined(CONFIG_CMD_RUN)
1539 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1540 {
1541         int i;
1542
1543         if (argc < 2)
1544                 return CMD_RET_USAGE;
1545
1546         for (i=1; i<argc; ++i) {
1547                 char *arg;
1548
1549                 if ((arg = getenv (argv[i])) == NULL) {
1550                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1551                         return 1;
1552                 }
1553
1554                 if (run_command_list(arg, -1, flag) != 0)
1555                         return 1;
1556         }
1557         return 0;
1558 }
1559 #endif