Allow newlines within command environment vars
[glsdk/glsdk-u-boot.git] / common / main.c
1 /*
2  * (C) Copyright 2000
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * Add to readline cmdline-editing by
6  * (C) Copyright 2005
7  * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
8  *
9  * See file CREDITS for list of people who contributed to this
10  * project.
11  *
12  * This program is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU General Public License as
14  * published by the Free Software Foundation; either version 2 of
15  * the License, or (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25  * MA 02111-1307 USA
26  */
28 /* #define      DEBUG   */
30 #include <common.h>
31 #include <watchdog.h>
32 #include <command.h>
33 #include <malloc.h>
34 #include <version.h>
35 #ifdef CONFIG_MODEM_SUPPORT
36 #include <malloc.h>             /* for free() prototype */
37 #endif
39 #ifdef CONFIG_SYS_HUSH_PARSER
40 #include <hush.h>
41 #endif
43 #include <post.h>
44 #include <linux/ctype.h>
45 #include <menu.h>
47 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
48 DECLARE_GLOBAL_DATA_PTR;
49 #endif
51 /*
52  * Board-specific Platform code can reimplement show_boot_progress () if needed
53  */
54 void inline __show_boot_progress (int val) {}
55 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
57 #if defined(CONFIG_UPDATE_TFTP)
58 int update_tftp (ulong addr);
59 #endif /* CONFIG_UPDATE_TFTP */
61 #define MAX_DELAY_STOP_STR 32
63 #undef DEBUG_PARSER
65 char        console_buffer[CONFIG_SYS_CBSIZE + 1];      /* console I/O buffer   */
67 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
68 static const char erase_seq[] = "\b \b";                /* erase sequence       */
69 static const char   tab_seq[] = "        ";             /* used to expand TABs  */
71 #ifdef CONFIG_BOOT_RETRY_TIME
72 static uint64_t endtime = 0;  /* must be set, default is instant timeout */
73 static int      retry_time = -1; /* -1 so can call readline before main_loop */
74 #endif
76 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
78 #ifndef CONFIG_BOOT_RETRY_MIN
79 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
80 #endif
82 #ifdef CONFIG_MODEM_SUPPORT
83 int do_mdm_init = 0;
84 extern void mdm_init(void); /* defined in board.c */
85 #endif
87 /***************************************************************************
88  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
89  * returns: 0 -  no key string, allow autoboot 1 - got key string, abort
90  */
91 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
92 # if defined(CONFIG_AUTOBOOT_KEYED)
93 #ifndef CONFIG_MENU
94 static inline
95 #endif
96 int abortboot(int bootdelay)
97 {
98         int abort = 0;
99         uint64_t etime = endtick(bootdelay);
100         struct {
101                 char* str;
102                 u_int len;
103                 int retry;
104         }
105         delaykey [] = {
106                 { str: getenv ("bootdelaykey"),  retry: 1 },
107                 { str: getenv ("bootdelaykey2"), retry: 1 },
108                 { str: getenv ("bootstopkey"),   retry: 0 },
109                 { str: getenv ("bootstopkey2"),  retry: 0 },
110         };
112         char presskey [MAX_DELAY_STOP_STR];
113         u_int presskey_len = 0;
114         u_int presskey_max = 0;
115         u_int i;
117 #  ifdef CONFIG_AUTOBOOT_PROMPT
118         printf(CONFIG_AUTOBOOT_PROMPT);
119 #  endif
121 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
122         if (delaykey[0].str == NULL)
123                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
124 #  endif
125 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
126         if (delaykey[1].str == NULL)
127                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
128 #  endif
129 #  ifdef CONFIG_AUTOBOOT_STOP_STR
130         if (delaykey[2].str == NULL)
131                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
132 #  endif
133 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
134         if (delaykey[3].str == NULL)
135                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
136 #  endif
138         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
139                 delaykey[i].len = delaykey[i].str == NULL ?
140                                     0 : strlen (delaykey[i].str);
141                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
142                                     MAX_DELAY_STOP_STR : delaykey[i].len;
144                 presskey_max = presskey_max > delaykey[i].len ?
145                                     presskey_max : delaykey[i].len;
147 #  if DEBUG_BOOTKEYS
148                 printf("%s key:<%s>\n",
149                        delaykey[i].retry ? "delay" : "stop",
150                        delaykey[i].str ? delaykey[i].str : "NULL");
151 #  endif
152         }
154         /* In order to keep up with incoming data, check timeout only
155          * when catch up.
156          */
157         do {
158                 if (tstc()) {
159                         if (presskey_len < presskey_max) {
160                                 presskey [presskey_len ++] = getc();
161                         }
162                         else {
163                                 for (i = 0; i < presskey_max - 1; i ++)
164                                         presskey [i] = presskey [i + 1];
166                                 presskey [i] = getc();
167                         }
168                 }
170                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
171                         if (delaykey[i].len > 0 &&
172                             presskey_len >= delaykey[i].len &&
173                             memcmp (presskey + presskey_len - delaykey[i].len,
174                                     delaykey[i].str,
175                                     delaykey[i].len) == 0) {
176 #  if DEBUG_BOOTKEYS
177                                 printf("got %skey\n",
178                                        delaykey[i].retry ? "delay" : "stop");
179 #  endif
181 #  ifdef CONFIG_BOOT_RETRY_TIME
182                                 /* don't retry auto boot */
183                                 if (! delaykey[i].retry)
184                                         retry_time = -1;
185 #  endif
186                                 abort = 1;
187                         }
188                 }
189         } while (!abort && get_ticks() <= etime);
191 #  if DEBUG_BOOTKEYS
192         if (!abort)
193                 puts("key timeout\n");
194 #  endif
196 #ifdef CONFIG_SILENT_CONSOLE
197         if (abort)
198                 gd->flags &= ~GD_FLG_SILENT;
199 #endif
201         return abort;
204 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
206 #ifdef CONFIG_MENUKEY
207 static int menukey = 0;
208 #endif
210 #ifndef CONFIG_MENU
211 static inline
212 #endif
213 int abortboot(int bootdelay)
215         int abort = 0;
217 #ifdef CONFIG_MENUPROMPT
218         printf(CONFIG_MENUPROMPT);
219 #else
220         printf("Hit any key to stop autoboot: %2d ", bootdelay);
221 #endif
223 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
224         /*
225          * Check if key already pressed
226          * Don't check if bootdelay < 0
227          */
228         if (bootdelay >= 0) {
229                 if (tstc()) {   /* we got a key press   */
230                         (void) getc();  /* consume input        */
231                         puts ("\b\b\b 0");
232                         abort = 1;      /* don't auto boot      */
233                 }
234         }
235 #endif
237         while ((bootdelay > 0) && (!abort)) {
238                 int i;
240                 --bootdelay;
241                 /* delay 100 * 10ms */
242                 for (i=0; !abort && i<100; ++i) {
243                         if (tstc()) {   /* we got a key press   */
244                                 abort  = 1;     /* don't auto boot      */
245                                 bootdelay = 0;  /* no more delay        */
246 # ifdef CONFIG_MENUKEY
247                                 menukey = getc();
248 # else
249                                 (void) getc();  /* consume input        */
250 # endif
251                                 break;
252                         }
253                         udelay(10000);
254                 }
256                 printf("\b\b\b%2d ", bootdelay);
257         }
259         putc('\n');
261 #ifdef CONFIG_SILENT_CONSOLE
262         if (abort)
263                 gd->flags &= ~GD_FLG_SILENT;
264 #endif
266         return abort;
268 # endif /* CONFIG_AUTOBOOT_KEYED */
269 #endif  /* CONFIG_BOOTDELAY >= 0  */
271 /****************************************************************************/
273 void main_loop (void)
275 #ifndef CONFIG_SYS_HUSH_PARSER
276         static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
277         int len;
278         int rc = 1;
279         int flag;
280 #endif
282 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
283         char *s;
284         int bootdelay;
285 #endif
286 #ifdef CONFIG_PREBOOT
287         char *p;
288 #endif
289 #ifdef CONFIG_BOOTCOUNT_LIMIT
290         unsigned long bootcount = 0;
291         unsigned long bootlimit = 0;
292         char *bcs;
293         char bcs_set[16];
294 #endif /* CONFIG_BOOTCOUNT_LIMIT */
296 #ifdef CONFIG_BOOTCOUNT_LIMIT
297         bootcount = bootcount_load();
298         bootcount++;
299         bootcount_store (bootcount);
300         sprintf (bcs_set, "%lu", bootcount);
301         setenv ("bootcount", bcs_set);
302         bcs = getenv ("bootlimit");
303         bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
304 #endif /* CONFIG_BOOTCOUNT_LIMIT */
306 #ifdef CONFIG_MODEM_SUPPORT
307         debug ("DEBUG: main_loop:   do_mdm_init=%d\n", do_mdm_init);
308         if (do_mdm_init) {
309                 char *str = strdup(getenv("mdm_cmd"));
310                 setenv ("preboot", str);  /* set or delete definition */
311                 if (str != NULL)
312                         free (str);
313                 mdm_init(); /* wait for modem connection */
314         }
315 #endif  /* CONFIG_MODEM_SUPPORT */
317 #ifdef CONFIG_VERSION_VARIABLE
318         {
319                 setenv ("ver", version_string);  /* set version variable */
320         }
321 #endif /* CONFIG_VERSION_VARIABLE */
323 #ifdef CONFIG_SYS_HUSH_PARSER
324         u_boot_hush_start ();
325 #endif
327 #if defined(CONFIG_HUSH_INIT_VAR)
328         hush_init_var ();
329 #endif
331 #ifdef CONFIG_PREBOOT
332         if ((p = getenv ("preboot")) != NULL) {
333 # ifdef CONFIG_AUTOBOOT_KEYED
334                 int prev = disable_ctrlc(1);    /* disable Control C checking */
335 # endif
337                 run_command_list(p, -1, 0);
339 # ifdef CONFIG_AUTOBOOT_KEYED
340                 disable_ctrlc(prev);    /* restore Control C checking */
341 # endif
342         }
343 #endif /* CONFIG_PREBOOT */
345 #if defined(CONFIG_UPDATE_TFTP)
346         update_tftp (0UL);
347 #endif /* CONFIG_UPDATE_TFTP */
349 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
350         s = getenv ("bootdelay");
351         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
353         debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
355 #if defined(CONFIG_MENU_SHOW)
356         bootdelay = menu_show(bootdelay);
357 #endif
358 # ifdef CONFIG_BOOT_RETRY_TIME
359         init_cmd_timeout ();
360 # endif /* CONFIG_BOOT_RETRY_TIME */
362 #ifdef CONFIG_POST
363         if (gd->flags & GD_FLG_POSTFAIL) {
364                 s = getenv("failbootcmd");
365         }
366         else
367 #endif /* CONFIG_POST */
368 #ifdef CONFIG_BOOTCOUNT_LIMIT
369         if (bootlimit && (bootcount > bootlimit)) {
370                 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
371                         (unsigned)bootlimit);
372                 s = getenv ("altbootcmd");
373         }
374         else
375 #endif /* CONFIG_BOOTCOUNT_LIMIT */
376                 s = getenv ("bootcmd");
378         debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
380         if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
381 # ifdef CONFIG_AUTOBOOT_KEYED
382                 int prev = disable_ctrlc(1);    /* disable Control C checking */
383 # endif
385                 run_command_list(s, -1, 0);
387 # ifdef CONFIG_AUTOBOOT_KEYED
388                 disable_ctrlc(prev);    /* restore Control C checking */
389 # endif
390         }
392 # ifdef CONFIG_MENUKEY
393         if (menukey == CONFIG_MENUKEY) {
394                 s = getenv("menucmd");
395                 if (s)
396                         run_command_list(s, -1, 0);
397         }
398 #endif /* CONFIG_MENUKEY */
399 #endif /* CONFIG_BOOTDELAY */
401         /*
402          * Main Loop for Monitor Command Processing
403          */
404 #ifdef CONFIG_SYS_HUSH_PARSER
405         parse_file_outer();
406         /* This point is never reached */
407         for (;;);
408 #else
409         for (;;) {
410 #ifdef CONFIG_BOOT_RETRY_TIME
411                 if (rc >= 0) {
412                         /* Saw enough of a valid command to
413                          * restart the timeout.
414                          */
415                         reset_cmd_timeout();
416                 }
417 #endif
418                 len = readline (CONFIG_SYS_PROMPT);
420                 flag = 0;       /* assume no special flags for now */
421                 if (len > 0)
422                         strcpy (lastcommand, console_buffer);
423                 else if (len == 0)
424                         flag |= CMD_FLAG_REPEAT;
425 #ifdef CONFIG_BOOT_RETRY_TIME
426                 else if (len == -2) {
427                         /* -2 means timed out, retry autoboot
428                          */
429                         puts ("\nTimed out waiting for command\n");
430 # ifdef CONFIG_RESET_TO_RETRY
431                         /* Reinit board to run initialization code again */
432                         do_reset (NULL, 0, 0, NULL);
433 # else
434                         return;         /* retry autoboot */
435 # endif
436                 }
437 #endif
439                 if (len == -1)
440                         puts ("<INTERRUPT>\n");
441                 else
442                         rc = run_command(lastcommand, flag);
444                 if (rc <= 0) {
445                         /* invalid command or not repeatable, forget it */
446                         lastcommand[0] = 0;
447                 }
448         }
449 #endif /*CONFIG_SYS_HUSH_PARSER*/
452 #ifdef CONFIG_BOOT_RETRY_TIME
453 /***************************************************************************
454  * initialize command line timeout
455  */
456 void init_cmd_timeout(void)
458         char *s = getenv ("bootretry");
460         if (s != NULL)
461                 retry_time = (int)simple_strtol(s, NULL, 10);
462         else
463                 retry_time =  CONFIG_BOOT_RETRY_TIME;
465         if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
466                 retry_time = CONFIG_BOOT_RETRY_MIN;
469 /***************************************************************************
470  * reset command line timeout to retry_time seconds
471  */
472 void reset_cmd_timeout(void)
474         endtime = endtick(retry_time);
476 #endif
478 #ifdef CONFIG_CMDLINE_EDITING
480 /*
481  * cmdline-editing related codes from vivi.
482  * Author: Janghoon Lyu <nandy@mizi.com>
483  */
485 #define putnstr(str,n)  do {                    \
486                 printf ("%.*s", (int)n, str);   \
487         } while (0)
489 #define CTL_CH(c)               ((c) - 'a' + 1)
490 #define CTL_BACKSPACE           ('\b')
491 #define DEL                     ((char)255)
492 #define DEL7                    ((char)127)
493 #define CREAD_HIST_CHAR         ('!')
495 #define getcmd_putch(ch)        putc(ch)
496 #define getcmd_getch()          getc()
497 #define getcmd_cbeep()          getcmd_putch('\a')
499 #define HIST_MAX                20
500 #define HIST_SIZE               CONFIG_SYS_CBSIZE
502 static int hist_max = 0;
503 static int hist_add_idx = 0;
504 static int hist_cur = -1;
505 unsigned hist_num = 0;
507 char* hist_list[HIST_MAX];
508 char hist_lines[HIST_MAX][HIST_SIZE + 1];        /* Save room for NULL */
510 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
512 static void hist_init(void)
514         int i;
516         hist_max = 0;
517         hist_add_idx = 0;
518         hist_cur = -1;
519         hist_num = 0;
521         for (i = 0; i < HIST_MAX; i++) {
522                 hist_list[i] = hist_lines[i];
523                 hist_list[i][0] = '\0';
524         }
527 static void cread_add_to_hist(char *line)
529         strcpy(hist_list[hist_add_idx], line);
531         if (++hist_add_idx >= HIST_MAX)
532                 hist_add_idx = 0;
534         if (hist_add_idx > hist_max)
535                 hist_max = hist_add_idx;
537         hist_num++;
540 static char* hist_prev(void)
542         char *ret;
543         int old_cur;
545         if (hist_cur < 0)
546                 return NULL;
548         old_cur = hist_cur;
549         if (--hist_cur < 0)
550                 hist_cur = hist_max;
552         if (hist_cur == hist_add_idx) {
553                 hist_cur = old_cur;
554                 ret = NULL;
555         } else
556                 ret = hist_list[hist_cur];
558         return (ret);
561 static char* hist_next(void)
563         char *ret;
565         if (hist_cur < 0)
566                 return NULL;
568         if (hist_cur == hist_add_idx)
569                 return NULL;
571         if (++hist_cur > hist_max)
572                 hist_cur = 0;
574         if (hist_cur == hist_add_idx) {
575                 ret = "";
576         } else
577                 ret = hist_list[hist_cur];
579         return (ret);
582 #ifndef CONFIG_CMDLINE_EDITING
583 static void cread_print_hist_list(void)
585         int i;
586         unsigned long n;
588         n = hist_num - hist_max;
590         i = hist_add_idx + 1;
591         while (1) {
592                 if (i > hist_max)
593                         i = 0;
594                 if (i == hist_add_idx)
595                         break;
596                 printf("%s\n", hist_list[i]);
597                 n++;
598                 i++;
599         }
601 #endif /* CONFIG_CMDLINE_EDITING */
603 #define BEGINNING_OF_LINE() {                   \
604         while (num) {                           \
605                 getcmd_putch(CTL_BACKSPACE);    \
606                 num--;                          \
607         }                                       \
610 #define ERASE_TO_EOL() {                                \
611         if (num < eol_num) {                            \
612                 printf("%*s", (int)(eol_num - num), ""); \
613                 do {                                    \
614                         getcmd_putch(CTL_BACKSPACE);    \
615                 } while (--eol_num > num);              \
616         }                                               \
619 #define REFRESH_TO_EOL() {                      \
620         if (num < eol_num) {                    \
621                 wlen = eol_num - num;           \
622                 putnstr(buf + num, wlen);       \
623                 num = eol_num;                  \
624         }                                       \
627 static void cread_add_char(char ichar, int insert, unsigned long *num,
628                unsigned long *eol_num, char *buf, unsigned long len)
630         unsigned long wlen;
632         /* room ??? */
633         if (insert || *num == *eol_num) {
634                 if (*eol_num > len - 1) {
635                         getcmd_cbeep();
636                         return;
637                 }
638                 (*eol_num)++;
639         }
641         if (insert) {
642                 wlen = *eol_num - *num;
643                 if (wlen > 1) {
644                         memmove(&buf[*num+1], &buf[*num], wlen-1);
645                 }
647                 buf[*num] = ichar;
648                 putnstr(buf + *num, wlen);
649                 (*num)++;
650                 while (--wlen) {
651                         getcmd_putch(CTL_BACKSPACE);
652                 }
653         } else {
654                 /* echo the character */
655                 wlen = 1;
656                 buf[*num] = ichar;
657                 putnstr(buf + *num, wlen);
658                 (*num)++;
659         }
662 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
663               unsigned long *eol_num, char *buf, unsigned long len)
665         while (strsize--) {
666                 cread_add_char(*str, insert, num, eol_num, buf, len);
667                 str++;
668         }
671 static int cread_line(const char *const prompt, char *buf, unsigned int *len,
672                 int timeout)
674         unsigned long num = 0;
675         unsigned long eol_num = 0;
676         unsigned long wlen;
677         char ichar;
678         int insert = 1;
679         int esc_len = 0;
680         char esc_save[8];
681         int init_len = strlen(buf);
682         int first = 1;
684         if (init_len)
685                 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
687         while (1) {
688 #ifdef CONFIG_BOOT_RETRY_TIME
689                 while (!tstc()) {       /* while no incoming data */
690                         if (retry_time >= 0 && get_ticks() > endtime)
691                                 return (-2);    /* timed out */
692                         WATCHDOG_RESET();
693                 }
694 #endif
695                 if (first && timeout) {
696                         uint64_t etime = endtick(timeout);
698                         while (!tstc()) {       /* while no incoming data */
699                                 if (get_ticks() >= etime)
700                                         return -2;      /* timed out */
701                                 WATCHDOG_RESET();
702                         }
703                         first = 0;
704                 }
706                 ichar = getcmd_getch();
708                 if ((ichar == '\n') || (ichar == '\r')) {
709                         putc('\n');
710                         break;
711                 }
713                 /*
714                  * handle standard linux xterm esc sequences for arrow key, etc.
715                  */
716                 if (esc_len != 0) {
717                         if (esc_len == 1) {
718                                 if (ichar == '[') {
719                                         esc_save[esc_len] = ichar;
720                                         esc_len = 2;
721                                 } else {
722                                         cread_add_str(esc_save, esc_len, insert,
723                                                       &num, &eol_num, buf, *len);
724                                         esc_len = 0;
725                                 }
726                                 continue;
727                         }
729                         switch (ichar) {
731                         case 'D':       /* <- key */
732                                 ichar = CTL_CH('b');
733                                 esc_len = 0;
734                                 break;
735                         case 'C':       /* -> key */
736                                 ichar = CTL_CH('f');
737                                 esc_len = 0;
738                                 break;  /* pass off to ^F handler */
739                         case 'H':       /* Home key */
740                                 ichar = CTL_CH('a');
741                                 esc_len = 0;
742                                 break;  /* pass off to ^A handler */
743                         case 'A':       /* up arrow */
744                                 ichar = CTL_CH('p');
745                                 esc_len = 0;
746                                 break;  /* pass off to ^P handler */
747                         case 'B':       /* down arrow */
748                                 ichar = CTL_CH('n');
749                                 esc_len = 0;
750                                 break;  /* pass off to ^N handler */
751                         default:
752                                 esc_save[esc_len++] = ichar;
753                                 cread_add_str(esc_save, esc_len, insert,
754                                               &num, &eol_num, buf, *len);
755                                 esc_len = 0;
756                                 continue;
757                         }
758                 }
760                 switch (ichar) {
761                 case 0x1b:
762                         if (esc_len == 0) {
763                                 esc_save[esc_len] = ichar;
764                                 esc_len = 1;
765                         } else {
766                                 puts("impossible condition #876\n");
767                                 esc_len = 0;
768                         }
769                         break;
771                 case CTL_CH('a'):
772                         BEGINNING_OF_LINE();
773                         break;
774                 case CTL_CH('c'):       /* ^C - break */
775                         *buf = '\0';    /* discard input */
776                         return (-1);
777                 case CTL_CH('f'):
778                         if (num < eol_num) {
779                                 getcmd_putch(buf[num]);
780                                 num++;
781                         }
782                         break;
783                 case CTL_CH('b'):
784                         if (num) {
785                                 getcmd_putch(CTL_BACKSPACE);
786                                 num--;
787                         }
788                         break;
789                 case CTL_CH('d'):
790                         if (num < eol_num) {
791                                 wlen = eol_num - num - 1;
792                                 if (wlen) {
793                                         memmove(&buf[num], &buf[num+1], wlen);
794                                         putnstr(buf + num, wlen);
795                                 }
797                                 getcmd_putch(' ');
798                                 do {
799                                         getcmd_putch(CTL_BACKSPACE);
800                                 } while (wlen--);
801                                 eol_num--;
802                         }
803                         break;
804                 case CTL_CH('k'):
805                         ERASE_TO_EOL();
806                         break;
807                 case CTL_CH('e'):
808                         REFRESH_TO_EOL();
809                         break;
810                 case CTL_CH('o'):
811                         insert = !insert;
812                         break;
813                 case CTL_CH('x'):
814                 case CTL_CH('u'):
815                         BEGINNING_OF_LINE();
816                         ERASE_TO_EOL();
817                         break;
818                 case DEL:
819                 case DEL7:
820                 case 8:
821                         if (num) {
822                                 wlen = eol_num - num;
823                                 num--;
824                                 memmove(&buf[num], &buf[num+1], wlen);
825                                 getcmd_putch(CTL_BACKSPACE);
826                                 putnstr(buf + num, wlen);
827                                 getcmd_putch(' ');
828                                 do {
829                                         getcmd_putch(CTL_BACKSPACE);
830                                 } while (wlen--);
831                                 eol_num--;
832                         }
833                         break;
834                 case CTL_CH('p'):
835                 case CTL_CH('n'):
836                 {
837                         char * hline;
839                         esc_len = 0;
841                         if (ichar == CTL_CH('p'))
842                                 hline = hist_prev();
843                         else
844                                 hline = hist_next();
846                         if (!hline) {
847                                 getcmd_cbeep();
848                                 continue;
849                         }
851                         /* nuke the current line */
852                         /* first, go home */
853                         BEGINNING_OF_LINE();
855                         /* erase to end of line */
856                         ERASE_TO_EOL();
858                         /* copy new line into place and display */
859                         strcpy(buf, hline);
860                         eol_num = strlen(buf);
861                         REFRESH_TO_EOL();
862                         continue;
863                 }
864 #ifdef CONFIG_AUTO_COMPLETE
865                 case '\t': {
866                         int num2, col;
868                         /* do not autocomplete when in the middle */
869                         if (num < eol_num) {
870                                 getcmd_cbeep();
871                                 break;
872                         }
874                         buf[num] = '\0';
875                         col = strlen(prompt) + eol_num;
876                         num2 = num;
877                         if (cmd_auto_complete(prompt, buf, &num2, &col)) {
878                                 col = num2 - num;
879                                 num += col;
880                                 eol_num += col;
881                         }
882                         break;
883                 }
884 #endif
885                 default:
886                         cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
887                         break;
888                 }
889         }
890         *len = eol_num;
891         buf[eol_num] = '\0';    /* lose the newline */
893         if (buf[0] && buf[0] != CREAD_HIST_CHAR)
894                 cread_add_to_hist(buf);
895         hist_cur = hist_add_idx;
897         return 0;
900 #endif /* CONFIG_CMDLINE_EDITING */
902 /****************************************************************************/
904 /*
905  * Prompt for input and read a line.
906  * If  CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
907  * time out when time goes past endtime (timebase time in ticks).
908  * Return:      number of read characters
909  *              -1 if break
910  *              -2 if timed out
911  */
912 int readline (const char *const prompt)
914         /*
915          * If console_buffer isn't 0-length the user will be prompted to modify
916          * it instead of entering it from scratch as desired.
917          */
918         console_buffer[0] = '\0';
920         return readline_into_buffer(prompt, console_buffer, 0);
924 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
926         char *p = buffer;
927 #ifdef CONFIG_CMDLINE_EDITING
928         unsigned int len = CONFIG_SYS_CBSIZE;
929         int rc;
930         static int initted = 0;
932         /*
933          * History uses a global array which is not
934          * writable until after relocation to RAM.
935          * Revert to non-history version if still
936          * running from flash.
937          */
938         if (gd->flags & GD_FLG_RELOC) {
939                 if (!initted) {
940                         hist_init();
941                         initted = 1;
942                 }
944                 if (prompt)
945                         puts (prompt);
947                 rc = cread_line(prompt, p, &len, timeout);
948                 return rc < 0 ? rc : len;
950         } else {
951 #endif  /* CONFIG_CMDLINE_EDITING */
952         char * p_buf = p;
953         int     n = 0;                          /* buffer index         */
954         int     plen = 0;                       /* prompt length        */
955         int     col;                            /* output column cnt    */
956         char    c;
958         /* print prompt */
959         if (prompt) {
960                 plen = strlen (prompt);
961                 puts (prompt);
962         }
963         col = plen;
965         for (;;) {
966 #ifdef CONFIG_BOOT_RETRY_TIME
967                 while (!tstc()) {       /* while no incoming data */
968                         if (retry_time >= 0 && get_ticks() > endtime)
969                                 return (-2);    /* timed out */
970                         WATCHDOG_RESET();
971                 }
972 #endif
973                 WATCHDOG_RESET();               /* Trigger watchdog, if needed */
975 #ifdef CONFIG_SHOW_ACTIVITY
976                 while (!tstc()) {
977                         show_activity(0);
978                         WATCHDOG_RESET();
979                 }
980 #endif
981                 c = getc();
983                 /*
984                  * Special character handling
985                  */
986                 switch (c) {
987                 case '\r':                              /* Enter                */
988                 case '\n':
989                         *p = '\0';
990                         puts ("\r\n");
991                         return (p - p_buf);
993                 case '\0':                              /* nul                  */
994                         continue;
996                 case 0x03:                              /* ^C - break           */
997                         p_buf[0] = '\0';        /* discard input */
998                         return (-1);
1000                 case 0x15:                              /* ^U - erase line      */
1001                         while (col > plen) {
1002                                 puts (erase_seq);
1003                                 --col;
1004                         }
1005                         p = p_buf;
1006                         n = 0;
1007                         continue;
1009                 case 0x17:                              /* ^W - erase word      */
1010                         p=delete_char(p_buf, p, &col, &n, plen);
1011                         while ((n > 0) && (*p != ' ')) {
1012                                 p=delete_char(p_buf, p, &col, &n, plen);
1013                         }
1014                         continue;
1016                 case 0x08:                              /* ^H  - backspace      */
1017                 case 0x7F:                              /* DEL - backspace      */
1018                         p=delete_char(p_buf, p, &col, &n, plen);
1019                         continue;
1021                 default:
1022                         /*
1023                          * Must be a normal character then
1024                          */
1025                         if (n < CONFIG_SYS_CBSIZE-2) {
1026                                 if (c == '\t') {        /* expand TABs          */
1027 #ifdef CONFIG_AUTO_COMPLETE
1028                                         /* if auto completion triggered just continue */
1029                                         *p = '\0';
1030                                         if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1031                                                 p = p_buf + n;  /* reset */
1032                                                 continue;
1033                                         }
1034 #endif
1035                                         puts (tab_seq+(col&07));
1036                                         col += 8 - (col&07);
1037                                 } else {
1038                                         ++col;          /* echo input           */
1039                                         putc (c);
1040                                 }
1041                                 *p++ = c;
1042                                 ++n;
1043                         } else {                        /* Buffer full          */
1044                                 putc ('\a');
1045                         }
1046                 }
1047         }
1048 #ifdef CONFIG_CMDLINE_EDITING
1049         }
1050 #endif
1053 /****************************************************************************/
1055 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1057         char *s;
1059         if (*np == 0) {
1060                 return (p);
1061         }
1063         if (*(--p) == '\t') {                   /* will retype the whole line   */
1064                 while (*colp > plen) {
1065                         puts (erase_seq);
1066                         (*colp)--;
1067                 }
1068                 for (s=buffer; s<p; ++s) {
1069                         if (*s == '\t') {
1070                                 puts (tab_seq+((*colp) & 07));
1071                                 *colp += 8 - ((*colp) & 07);
1072                         } else {
1073                                 ++(*colp);
1074                                 putc (*s);
1075                         }
1076                 }
1077         } else {
1078                 puts (erase_seq);
1079                 (*colp)--;
1080         }
1081         (*np)--;
1082         return (p);
1085 /****************************************************************************/
1087 int parse_line (char *line, char *argv[])
1089         int nargs = 0;
1091 #ifdef DEBUG_PARSER
1092         printf ("parse_line: \"%s\"\n", line);
1093 #endif
1094         while (nargs < CONFIG_SYS_MAXARGS) {
1096                 /* skip any white space */
1097                 while (isblank(*line))
1098                         ++line;
1100                 if (*line == '\0') {    /* end of line, no more args    */
1101                         argv[nargs] = NULL;
1102 #ifdef DEBUG_PARSER
1103                 printf ("parse_line: nargs=%d\n", nargs);
1104 #endif
1105                         return (nargs);
1106                 }
1108                 argv[nargs++] = line;   /* begin of argument string     */
1110                 /* find end of string */
1111                 while (*line && !isblank(*line))
1112                         ++line;
1114                 if (*line == '\0') {    /* end of line, no more args    */
1115                         argv[nargs] = NULL;
1116 #ifdef DEBUG_PARSER
1117                 printf ("parse_line: nargs=%d\n", nargs);
1118 #endif
1119                         return (nargs);
1120                 }
1122                 *line++ = '\0';         /* terminate current arg         */
1123         }
1125         printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1127 #ifdef DEBUG_PARSER
1128         printf ("parse_line: nargs=%d\n", nargs);
1129 #endif
1130         return (nargs);
1133 /****************************************************************************/
1135 #ifndef CONFIG_SYS_HUSH_PARSER
1136 static void process_macros (const char *input, char *output)
1138         char c, prev;
1139         const char *varname_start = NULL;
1140         int inputcnt = strlen (input);
1141         int outputcnt = CONFIG_SYS_CBSIZE;
1142         int state = 0;          /* 0 = waiting for '$'  */
1144         /* 1 = waiting for '(' or '{' */
1145         /* 2 = waiting for ')' or '}' */
1146         /* 3 = waiting for '''  */
1147 #ifdef DEBUG_PARSER
1148         char *output_start = output;
1150         printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1151                 input);
1152 #endif
1154         prev = '\0';            /* previous character   */
1156         while (inputcnt && outputcnt) {
1157                 c = *input++;
1158                 inputcnt--;
1160                 if (state != 3) {
1161                         /* remove one level of escape characters */
1162                         if ((c == '\\') && (prev != '\\')) {
1163                                 if (inputcnt-- == 0)
1164                                         break;
1165                                 prev = c;
1166                                 c = *input++;
1167                         }
1168                 }
1170                 switch (state) {
1171                 case 0: /* Waiting for (unescaped) $    */
1172                         if ((c == '\'') && (prev != '\\')) {
1173                                 state = 3;
1174                                 break;
1175                         }
1176                         if ((c == '$') && (prev != '\\')) {
1177                                 state++;
1178                         } else {
1179                                 *(output++) = c;
1180                                 outputcnt--;
1181                         }
1182                         break;
1183                 case 1: /* Waiting for (        */
1184                         if (c == '(' || c == '{') {
1185                                 state++;
1186                                 varname_start = input;
1187                         } else {
1188                                 state = 0;
1189                                 *(output++) = '$';
1190                                 outputcnt--;
1192                                 if (outputcnt) {
1193                                         *(output++) = c;
1194                                         outputcnt--;
1195                                 }
1196                         }
1197                         break;
1198                 case 2: /* Waiting for )        */
1199                         if (c == ')' || c == '}') {
1200                                 int i;
1201                                 char envname[CONFIG_SYS_CBSIZE], *envval;
1202                                 int envcnt = input - varname_start - 1; /* Varname # of chars */
1204                                 /* Get the varname */
1205                                 for (i = 0; i < envcnt; i++) {
1206                                         envname[i] = varname_start[i];
1207                                 }
1208                                 envname[i] = 0;
1210                                 /* Get its value */
1211                                 envval = getenv (envname);
1213                                 /* Copy into the line if it exists */
1214                                 if (envval != NULL)
1215                                         while ((*envval) && outputcnt) {
1216                                                 *(output++) = *(envval++);
1217                                                 outputcnt--;
1218                                         }
1219                                 /* Look for another '$' */
1220                                 state = 0;
1221                         }
1222                         break;
1223                 case 3: /* Waiting for '        */
1224                         if ((c == '\'') && (prev != '\\')) {
1225                                 state = 0;
1226                         } else {
1227                                 *(output++) = c;
1228                                 outputcnt--;
1229                         }
1230                         break;
1231                 }
1232                 prev = c;
1233         }
1235         if (outputcnt)
1236                 *output = 0;
1237         else
1238                 *(output - 1) = 0;
1240 #ifdef DEBUG_PARSER
1241         printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1242                 strlen (output_start), output_start);
1243 #endif
1246 /****************************************************************************
1247  * returns:
1248  *      1  - command executed, repeatable
1249  *      0  - command executed but not repeatable, interrupted commands are
1250  *           always considered not repeatable
1251  *      -1 - not executed (unrecognized, bootd recursion or too many args)
1252  *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1253  *           considered unrecognized)
1254  *
1255  * WARNING:
1256  *
1257  * We must create a temporary copy of the command since the command we get
1258  * may be the result from getenv(), which returns a pointer directly to
1259  * the environment data, which may change magicly when the command we run
1260  * creates or modifies environment variables (like "bootp" does).
1261  */
1262 static int builtin_run_command(const char *cmd, int flag)
1264         char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd          */
1265         char *token;                    /* start of token in cmdbuf     */
1266         char *sep;                      /* end of token (separator) in cmdbuf */
1267         char finaltoken[CONFIG_SYS_CBSIZE];
1268         char *str = cmdbuf;
1269         char *argv[CONFIG_SYS_MAXARGS + 1];     /* NULL terminated      */
1270         int argc, inquotes;
1271         int repeatable = 1;
1272         int rc = 0;
1274 #ifdef DEBUG_PARSER
1275         printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1276         puts (cmd ? cmd : "NULL");      /* use puts - string may be loooong */
1277         puts ("\"\n");
1278 #endif
1280         clear_ctrlc();          /* forget any previous Control C */
1282         if (!cmd || !*cmd) {
1283                 return -1;      /* empty command */
1284         }
1286         if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1287                 puts ("## Command too long!\n");
1288                 return -1;
1289         }
1291         strcpy (cmdbuf, cmd);
1293         /* Process separators and check for invalid
1294          * repeatable commands
1295          */
1297 #ifdef DEBUG_PARSER
1298         printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1299 #endif
1300         while (*str) {
1302                 /*
1303                  * Find separator, or string end
1304                  * Allow simple escape of ';' by writing "\;"
1305                  */
1306                 for (inquotes = 0, sep = str; *sep; sep++) {
1307                         if ((*sep=='\'') &&
1308                             (*(sep-1) != '\\'))
1309                                 inquotes=!inquotes;
1311                         if (!inquotes &&
1312                             (*sep == ';') &&    /* separator            */
1313                             ( sep != str) &&    /* past string start    */
1314                             (*(sep-1) != '\\')) /* and NOT escaped      */
1315                                 break;
1316                 }
1318                 /*
1319                  * Limit the token to data between separators
1320                  */
1321                 token = str;
1322                 if (*sep) {
1323                         str = sep + 1;  /* start of command for next pass */
1324                         *sep = '\0';
1325                 }
1326                 else
1327                         str = sep;      /* no more commands for next pass */
1328 #ifdef DEBUG_PARSER
1329                 printf ("token: \"%s\"\n", token);
1330 #endif
1332                 /* find macros in this token and replace them */
1333                 process_macros (token, finaltoken);
1335                 /* Extract arguments */
1336                 if ((argc = parse_line (finaltoken, argv)) == 0) {
1337                         rc = -1;        /* no command at all */
1338                         continue;
1339                 }
1341                 if (cmd_process(flag, argc, argv, &repeatable))
1342                         rc = -1;
1344                 /* Did the user stop this? */
1345                 if (had_ctrlc ())
1346                         return -1;      /* if stopped then not repeatable */
1347         }
1349         return rc ? rc : repeatable;
1351 #endif
1353 /*
1354  * Run a command using the selected parser.
1355  *
1356  * @param cmd   Command to run
1357  * @param flag  Execution flags (CMD_FLAG_...)
1358  * @return 0 on success, or != 0 on error.
1359  */
1360 int run_command(const char *cmd, int flag)
1362 #ifndef CONFIG_SYS_HUSH_PARSER
1363         /*
1364          * builtin_run_command can return 0 or 1 for success, so clean up
1365          * its result.
1366          */
1367         if (builtin_run_command(cmd, flag) == -1)
1368                 return 1;
1370         return 0;
1371 #else
1372         return parse_string_outer(cmd,
1373                         FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
1374 #endif
1377 #ifndef CONFIG_SYS_HUSH_PARSER
1378 /**
1379  * Execute a list of command separated by ; or \n using the built-in parser.
1380  *
1381  * This function cannot take a const char * for the command, since if it
1382  * finds newlines in the string, it replaces them with \0.
1383  *
1384  * @param cmd   String containing list of commands
1385  * @param flag  Execution flags (CMD_FLAG_...)
1386  * @return 0 on success, or != 0 on error.
1387  */
1388 static int builtin_run_command_list(char *cmd, int flag)
1390         char *line, *next;
1391         int rcode = 0;
1393         /*
1394          * Break into individual lines, and execute each line; terminate on
1395          * error.
1396          */
1397         line = next = cmd;
1398         while (*next) {
1399                 if (*next == '\n') {
1400                         *next = '\0';
1401                         /* run only non-empty commands */
1402                         if (*line) {
1403                                 debug("** exec: \"%s\"\n", line);
1404                                 if (builtin_run_command(line, 0) < 0) {
1405                                         rcode = 1;
1406                                         break;
1407                                 }
1408                         }
1409                         line = next + 1;
1410                 }
1411                 ++next;
1412         }
1413         if (rcode == 0 && *line)
1414                 rcode = (builtin_run_command(line, 0) >= 0);
1416         return rcode;
1418 #endif
1420 int run_command_list(const char *cmd, int len, int flag)
1422         int need_buff = 1;
1423         char *buff = (char *)cmd;       /* cast away const */
1424         int rcode = 0;
1426         if (len == -1) {
1427                 len = strlen(cmd);
1428 #ifdef CONFIG_SYS_HUSH_PARSER
1429                 /* hush will never change our string */
1430                 need_buff = 0;
1431 #else
1432                 /* the built-in parser will change our string if it sees \n */
1433                 need_buff = strchr(cmd, '\n') != NULL;
1434 #endif
1435         }
1436         if (need_buff) {
1437                 buff = malloc(len + 1);
1438                 if (!buff)
1439                         return 1;
1440                 memcpy(buff, cmd, len);
1441                 buff[len] = '\0';
1442         }
1443 #ifdef CONFIG_SYS_HUSH_PARSER
1444         rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON);
1445 #else
1446         /*
1447          * This function will overwrite any \n it sees with a \0, which
1448          * is why it can't work with a const char *. Here we are making
1449          * using of internal knowledge of this function, to avoid always
1450          * doing a malloc() which is actually required only in a case that
1451          * is pretty rare.
1452          */
1453         rcode = builtin_run_command_list(buff, flag);
1454         if (need_buff)
1455                 free(buff);
1456 #endif
1458         return rcode;
1461 /****************************************************************************/
1463 #if defined(CONFIG_CMD_RUN)
1464 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1466         int i;
1468         if (argc < 2)
1469                 return CMD_RET_USAGE;
1471         for (i=1; i<argc; ++i) {
1472                 char *arg;
1474                 if ((arg = getenv (argv[i])) == NULL) {
1475                         printf ("## Error: \"%s\" not defined\n", argv[i]);
1476                         return 1;
1477                 }
1479                 if (run_command(arg, flag) != 0)
1480                         return 1;
1481         }
1482         return 0;
1484 #endif