5 * Add to readline cmdline-editing by
9 * See file CREDITS for list of people who contributed to this
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.
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.
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,
36 #ifdef CONFIG_MODEM_SUPPORT
37 #include <malloc.h> /* for free() prototype */
40 #ifdef CONFIG_SYS_HUSH_PARSER
44 #ifdef CONFIG_OF_CONTROL
49 #include <linux/ctype.h>
52 DECLARE_GLOBAL_DATA_PTR;
55 * Board-specific Platform code can reimplement show_boot_progress () if needed
57 void inline __show_boot_progress (int val) {}
58 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
60 #define MAX_DELAY_STOP_STR 32
64 char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */
66 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
67 static const char erase_seq[] = "\b \b"; /* erase sequence */
68 static const char tab_seq[] = " "; /* used to expand TABs */
70 #ifdef CONFIG_BOOT_RETRY_TIME
71 static uint64_t endtime = 0; /* must be set, default is instant timeout */
72 static int retry_time = -1; /* -1 so can call readline before main_loop */
75 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
77 #ifndef CONFIG_BOOT_RETRY_MIN
78 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
81 #ifdef CONFIG_MODEM_SUPPORT
83 extern void mdm_init(void); /* defined in board.c */
86 /***************************************************************************
87 * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
88 * returns: 0 - no key string, allow autoboot 1 - got key string, abort
90 #if defined(CONFIG_BOOTDELAY)
91 # if defined(CONFIG_AUTOBOOT_KEYED)
92 static int abortboot_keyed(int bootdelay)
95 uint64_t etime = endtick(bootdelay);
102 { str: getenv ("bootdelaykey"), retry: 1 },
103 { str: getenv ("bootdelaykey2"), retry: 1 },
104 { str: getenv ("bootstopkey"), retry: 0 },
105 { str: getenv ("bootstopkey2"), retry: 0 },
108 char presskey [MAX_DELAY_STOP_STR];
109 u_int presskey_len = 0;
110 u_int presskey_max = 0;
113 #ifndef CONFIG_ZERO_BOOTDELAY_CHECK
118 # ifdef CONFIG_AUTOBOOT_PROMPT
119 printf(CONFIG_AUTOBOOT_PROMPT);
122 # ifdef CONFIG_AUTOBOOT_DELAY_STR
123 if (delaykey[0].str == NULL)
124 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
126 # ifdef CONFIG_AUTOBOOT_DELAY_STR2
127 if (delaykey[1].str == NULL)
128 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
130 # ifdef CONFIG_AUTOBOOT_STOP_STR
131 if (delaykey[2].str == NULL)
132 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
134 # ifdef CONFIG_AUTOBOOT_STOP_STR2
135 if (delaykey[3].str == NULL)
136 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
139 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
140 delaykey[i].len = delaykey[i].str == NULL ?
141 0 : strlen (delaykey[i].str);
142 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
143 MAX_DELAY_STOP_STR : delaykey[i].len;
145 presskey_max = presskey_max > delaykey[i].len ?
146 presskey_max : delaykey[i].len;
149 printf("%s key:<%s>\n",
150 delaykey[i].retry ? "delay" : "stop",
151 delaykey[i].str ? delaykey[i].str : "NULL");
155 /* In order to keep up with incoming data, check timeout only
160 if (presskey_len < presskey_max) {
161 presskey [presskey_len ++] = getc();
164 for (i = 0; i < presskey_max - 1; i ++)
165 presskey [i] = presskey [i + 1];
167 presskey [i] = getc();
171 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
172 if (delaykey[i].len > 0 &&
173 presskey_len >= delaykey[i].len &&
174 memcmp (presskey + presskey_len - delaykey[i].len,
176 delaykey[i].len) == 0) {
178 printf("got %skey\n",
179 delaykey[i].retry ? "delay" : "stop");
182 # ifdef CONFIG_BOOT_RETRY_TIME
183 /* don't retry auto boot */
184 if (! delaykey[i].retry)
190 } while (!abort && get_ticks() <= etime);
194 puts("key timeout\n");
197 #ifdef CONFIG_SILENT_CONSOLE
199 gd->flags &= ~GD_FLG_SILENT;
205 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */
207 #ifdef CONFIG_MENUKEY
208 static int menukey = 0;
211 static int abortboot_normal(int bootdelay)
216 #ifdef CONFIG_MENUPROMPT
217 printf(CONFIG_MENUPROMPT);
220 printf("Hit any key to stop autoboot: %2d ", bootdelay);
223 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
225 * Check if key already pressed
226 * Don't check if bootdelay < 0
228 if (bootdelay >= 0) {
229 if (tstc()) { /* we got a key press */
230 (void) getc(); /* consume input */
232 abort = 1; /* don't auto boot */
237 while ((bootdelay > 0) && (!abort)) {
242 if (tstc()) { /* we got a key press */
243 abort = 1; /* don't auto boot */
244 bootdelay = 0; /* no more delay */
245 # ifdef CONFIG_MENUKEY
248 (void) getc(); /* consume input */
253 } while (!abort && get_timer(ts) < 1000);
255 printf("\b\b\b%2d ", bootdelay);
260 #ifdef CONFIG_SILENT_CONSOLE
262 gd->flags &= ~GD_FLG_SILENT;
267 # endif /* CONFIG_AUTOBOOT_KEYED */
269 static int abortboot(int bootdelay)
271 #ifdef CONFIG_AUTOBOOT_KEYED
272 return abortboot_keyed(bootdelay);
274 return abortboot_normal(bootdelay);
277 #endif /* CONFIG_BOOTDELAY */
280 * Runs the given boot command securely. Specifically:
281 * - Doesn't run the command with the shell (run_command or parse_string_outer),
282 * since that's a lot of code surface that an attacker might exploit.
283 * Because of this, we don't do any argument parsing--the secure boot command
284 * has to be a full-fledged u-boot command.
285 * - Doesn't check for keypresses before booting, since that could be a
286 * security hole; also disables Ctrl-C.
287 * - Doesn't allow the command to return.
289 * Upon any failures, this function will drop into an infinite loop after
290 * printing the error message to console.
293 #if defined(CONFIG_BOOTDELAY) && defined(CONFIG_OF_CONTROL)
294 static void secure_boot_cmd(char *cmd)
300 printf("## Error: Secure boot command not specified\n");
304 /* Disable Ctrl-C just in case some command is used that checks it. */
307 /* Find the command directly. */
308 cmdtp = find_cmd(cmd);
310 printf("## Error: \"%s\" not defined\n", cmd);
314 /* Run the command, forcing no flags and faking argc and argv. */
315 rc = (cmdtp->cmd)(cmdtp, 0, 1, &cmd);
317 /* Shouldn't ever return from boot command. */
318 printf("## Error: \"%s\" returned (code %d)\n", cmd, rc);
322 * Not a whole lot to do here. Rebooting won't help much, since we'll
323 * just end up right back here. Just loop.
328 static void process_fdt_options(const void *blob)
332 /* Add an env variable to point to a kernel payload, if available */
333 addr = fdtdec_get_config_int(gd->fdt_blob, "kernel-offset", 0);
335 setenv_addr("kernaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
337 /* Add an env variable to point to a root disk, if available */
338 addr = fdtdec_get_config_int(gd->fdt_blob, "rootdisk-offset", 0);
340 setenv_addr("rootaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
342 #endif /* CONFIG_OF_CONTROL */
345 /****************************************************************************/
347 void main_loop (void)
349 #ifndef CONFIG_SYS_HUSH_PARSER
350 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
355 #if defined(CONFIG_BOOTDELAY) && defined(CONFIG_OF_CONTROL)
358 #if defined(CONFIG_BOOTDELAY)
362 #ifdef CONFIG_PREBOOT
365 #ifdef CONFIG_BOOTCOUNT_LIMIT
366 unsigned long bootcount = 0;
367 unsigned long bootlimit = 0;
370 #endif /* CONFIG_BOOTCOUNT_LIMIT */
372 bootstage_mark_name(BOOTSTAGE_ID_MAIN_LOOP, "main_loop");
374 #ifdef CONFIG_BOOTCOUNT_LIMIT
375 bootcount = bootcount_load();
377 bootcount_store (bootcount);
378 sprintf (bcs_set, "%lu", bootcount);
379 setenv ("bootcount", bcs_set);
380 bcs = getenv ("bootlimit");
381 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
382 #endif /* CONFIG_BOOTCOUNT_LIMIT */
384 #ifdef CONFIG_MODEM_SUPPORT
385 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init);
387 char *str = strdup(getenv("mdm_cmd"));
388 setenv ("preboot", str); /* set or delete definition */
391 mdm_init(); /* wait for modem connection */
393 #endif /* CONFIG_MODEM_SUPPORT */
395 #ifdef CONFIG_VERSION_VARIABLE
397 setenv ("ver", version_string); /* set version variable */
399 #endif /* CONFIG_VERSION_VARIABLE */
401 #ifdef CONFIG_SYS_HUSH_PARSER
402 u_boot_hush_start ();
405 #if defined(CONFIG_HUSH_INIT_VAR)
409 #ifdef CONFIG_PREBOOT
410 if ((p = getenv ("preboot")) != NULL) {
411 # ifdef CONFIG_AUTOBOOT_KEYED
412 int prev = disable_ctrlc(1); /* disable Control C checking */
415 run_command_list(p, -1, 0);
417 # ifdef CONFIG_AUTOBOOT_KEYED
418 disable_ctrlc(prev); /* restore Control C checking */
421 #endif /* CONFIG_PREBOOT */
423 #if defined(CONFIG_UPDATE_TFTP)
425 #endif /* CONFIG_UPDATE_TFTP */
427 #if defined(CONFIG_BOOTDELAY)
428 s = getenv ("bootdelay");
429 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
431 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
433 #if defined(CONFIG_MENU_SHOW)
434 bootdelay = menu_show(bootdelay);
436 # ifdef CONFIG_BOOT_RETRY_TIME
438 # endif /* CONFIG_BOOT_RETRY_TIME */
441 if (gd->flags & GD_FLG_POSTFAIL) {
442 s = getenv("failbootcmd");
445 #endif /* CONFIG_POST */
446 #ifdef CONFIG_BOOTCOUNT_LIMIT
447 if (bootlimit && (bootcount > bootlimit)) {
448 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
449 (unsigned)bootlimit);
450 s = getenv ("altbootcmd");
453 #endif /* CONFIG_BOOTCOUNT_LIMIT */
454 s = getenv ("bootcmd");
455 #ifdef CONFIG_OF_CONTROL
456 /* Allow the fdt to override the boot command */
457 env = fdtdec_get_config_string(gd->fdt_blob, "bootcmd");
461 process_fdt_options(gd->fdt_blob);
464 * If the bootsecure option was chosen, use secure_boot_cmd().
465 * Always use 'env' in this case, since bootsecure requres that the
466 * bootcmd was specified in the FDT too.
468 if (fdtdec_get_config_int(gd->fdt_blob, "bootsecure", 0))
469 secure_boot_cmd(env);
471 #endif /* CONFIG_OF_CONTROL */
473 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
475 if (bootdelay != -1 && s && !abortboot(bootdelay)) {
476 # ifdef CONFIG_AUTOBOOT_KEYED
477 int prev = disable_ctrlc(1); /* disable Control C checking */
480 run_command_list(s, -1, 0);
482 # ifdef CONFIG_AUTOBOOT_KEYED
483 disable_ctrlc(prev); /* restore Control C checking */
487 # ifdef CONFIG_MENUKEY
488 if (menukey == CONFIG_MENUKEY) {
489 s = getenv("menucmd");
491 run_command_list(s, -1, 0);
493 #endif /* CONFIG_MENUKEY */
494 #endif /* CONFIG_BOOTDELAY */
497 * Main Loop for Monitor Command Processing
499 #ifdef CONFIG_SYS_HUSH_PARSER
501 /* This point is never reached */
505 #ifdef CONFIG_BOOT_RETRY_TIME
507 /* Saw enough of a valid command to
508 * restart the timeout.
513 len = readline (CONFIG_SYS_PROMPT);
515 flag = 0; /* assume no special flags for now */
517 strcpy (lastcommand, console_buffer);
519 flag |= CMD_FLAG_REPEAT;
520 #ifdef CONFIG_BOOT_RETRY_TIME
521 else if (len == -2) {
522 /* -2 means timed out, retry autoboot
524 puts ("\nTimed out waiting for command\n");
525 # ifdef CONFIG_RESET_TO_RETRY
526 /* Reinit board to run initialization code again */
527 do_reset (NULL, 0, 0, NULL);
529 return; /* retry autoboot */
535 puts ("<INTERRUPT>\n");
537 rc = run_command(lastcommand, flag);
540 /* invalid command or not repeatable, forget it */
544 #endif /*CONFIG_SYS_HUSH_PARSER*/
547 #ifdef CONFIG_BOOT_RETRY_TIME
548 /***************************************************************************
549 * initialize command line timeout
551 void init_cmd_timeout(void)
553 char *s = getenv ("bootretry");
556 retry_time = (int)simple_strtol(s, NULL, 10);
558 retry_time = CONFIG_BOOT_RETRY_TIME;
560 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
561 retry_time = CONFIG_BOOT_RETRY_MIN;
564 /***************************************************************************
565 * reset command line timeout to retry_time seconds
567 void reset_cmd_timeout(void)
569 endtime = endtick(retry_time);
573 #ifdef CONFIG_CMDLINE_EDITING
576 * cmdline-editing related codes from vivi.
580 #define putnstr(str,n) do { \
581 printf ("%.*s", (int)n, str); \
584 #define CTL_CH(c) ((c) - 'a' + 1)
585 #define CTL_BACKSPACE ('\b')
586 #define DEL ((char)255)
587 #define DEL7 ((char)127)
588 #define CREAD_HIST_CHAR ('!')
590 #define getcmd_putch(ch) putc(ch)
591 #define getcmd_getch() getc()
592 #define getcmd_cbeep() getcmd_putch('\a')
595 #define HIST_SIZE CONFIG_SYS_CBSIZE
598 static int hist_add_idx;
599 static int hist_cur = -1;
600 static unsigned hist_num;
602 static char *hist_list[HIST_MAX];
603 static char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */
605 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
607 static void hist_init(void)
616 for (i = 0; i < HIST_MAX; i++) {
617 hist_list[i] = hist_lines[i];
618 hist_list[i][0] = '\0';
622 static void cread_add_to_hist(char *line)
624 strcpy(hist_list[hist_add_idx], line);
626 if (++hist_add_idx >= HIST_MAX)
629 if (hist_add_idx > hist_max)
630 hist_max = hist_add_idx;
635 static char* hist_prev(void)
647 if (hist_cur == hist_add_idx) {
651 ret = hist_list[hist_cur];
656 static char* hist_next(void)
663 if (hist_cur == hist_add_idx)
666 if (++hist_cur > hist_max)
669 if (hist_cur == hist_add_idx) {
672 ret = hist_list[hist_cur];
677 #ifndef CONFIG_CMDLINE_EDITING
678 static void cread_print_hist_list(void)
683 n = hist_num - hist_max;
685 i = hist_add_idx + 1;
689 if (i == hist_add_idx)
691 printf("%s\n", hist_list[i]);
696 #endif /* CONFIG_CMDLINE_EDITING */
698 #define BEGINNING_OF_LINE() { \
700 getcmd_putch(CTL_BACKSPACE); \
705 #define ERASE_TO_EOL() { \
706 if (num < eol_num) { \
707 printf("%*s", (int)(eol_num - num), ""); \
709 getcmd_putch(CTL_BACKSPACE); \
710 } while (--eol_num > num); \
714 #define REFRESH_TO_EOL() { \
715 if (num < eol_num) { \
716 wlen = eol_num - num; \
717 putnstr(buf + num, wlen); \
722 static void cread_add_char(char ichar, int insert, unsigned long *num,
723 unsigned long *eol_num, char *buf, unsigned long len)
728 if (insert || *num == *eol_num) {
729 if (*eol_num > len - 1) {
737 wlen = *eol_num - *num;
739 memmove(&buf[*num+1], &buf[*num], wlen-1);
743 putnstr(buf + *num, wlen);
746 getcmd_putch(CTL_BACKSPACE);
749 /* echo the character */
752 putnstr(buf + *num, wlen);
757 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
758 unsigned long *eol_num, char *buf, unsigned long len)
761 cread_add_char(*str, insert, num, eol_num, buf, len);
766 static int cread_line(const char *const prompt, char *buf, unsigned int *len,
769 unsigned long num = 0;
770 unsigned long eol_num = 0;
776 int init_len = strlen(buf);
780 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
783 #ifdef CONFIG_BOOT_RETRY_TIME
784 while (!tstc()) { /* while no incoming data */
785 if (retry_time >= 0 && get_ticks() > endtime)
786 return (-2); /* timed out */
790 if (first && timeout) {
791 uint64_t etime = endtick(timeout);
793 while (!tstc()) { /* while no incoming data */
794 if (get_ticks() >= etime)
795 return -2; /* timed out */
801 ichar = getcmd_getch();
803 if ((ichar == '\n') || (ichar == '\r')) {
809 * handle standard linux xterm esc sequences for arrow key, etc.
814 esc_save[esc_len] = ichar;
817 cread_add_str(esc_save, esc_len, insert,
818 &num, &eol_num, buf, *len);
826 case 'D': /* <- key */
830 case 'C': /* -> key */
833 break; /* pass off to ^F handler */
834 case 'H': /* Home key */
837 break; /* pass off to ^A handler */
838 case 'A': /* up arrow */
841 break; /* pass off to ^P handler */
842 case 'B': /* down arrow */
845 break; /* pass off to ^N handler */
847 esc_save[esc_len++] = ichar;
848 cread_add_str(esc_save, esc_len, insert,
849 &num, &eol_num, buf, *len);
858 esc_save[esc_len] = ichar;
861 puts("impossible condition #876\n");
869 case CTL_CH('c'): /* ^C - break */
870 *buf = '\0'; /* discard input */
874 getcmd_putch(buf[num]);
880 getcmd_putch(CTL_BACKSPACE);
886 wlen = eol_num - num - 1;
888 memmove(&buf[num], &buf[num+1], wlen);
889 putnstr(buf + num, wlen);
894 getcmd_putch(CTL_BACKSPACE);
917 wlen = eol_num - num;
919 memmove(&buf[num], &buf[num+1], wlen);
920 getcmd_putch(CTL_BACKSPACE);
921 putnstr(buf + num, wlen);
924 getcmd_putch(CTL_BACKSPACE);
936 if (ichar == CTL_CH('p'))
946 /* nuke the current line */
950 /* erase to end of line */
953 /* copy new line into place and display */
955 eol_num = strlen(buf);
959 #ifdef CONFIG_AUTO_COMPLETE
963 /* do not autocomplete when in the middle */
970 col = strlen(prompt) + eol_num;
972 if (cmd_auto_complete(prompt, buf, &num2, &col)) {
981 cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
986 buf[eol_num] = '\0'; /* lose the newline */
988 if (buf[0] && buf[0] != CREAD_HIST_CHAR)
989 cread_add_to_hist(buf);
990 hist_cur = hist_add_idx;
995 #endif /* CONFIG_CMDLINE_EDITING */
997 /****************************************************************************/
1000 * Prompt for input and read a line.
1001 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
1002 * time out when time goes past endtime (timebase time in ticks).
1003 * Return: number of read characters
1007 int readline (const char *const prompt)
1010 * If console_buffer isn't 0-length the user will be prompted to modify
1011 * it instead of entering it from scratch as desired.
1013 console_buffer[0] = '\0';
1015 return readline_into_buffer(prompt, console_buffer, 0);
1019 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
1022 #ifdef CONFIG_CMDLINE_EDITING
1023 unsigned int len = CONFIG_SYS_CBSIZE;
1025 static int initted = 0;
1028 * History uses a global array which is not
1029 * writable until after relocation to RAM.
1030 * Revert to non-history version if still
1031 * running from flash.
1033 if (gd->flags & GD_FLG_RELOC) {
1042 rc = cread_line(prompt, p, &len, timeout);
1043 return rc < 0 ? rc : len;
1046 #endif /* CONFIG_CMDLINE_EDITING */
1048 int n = 0; /* buffer index */
1049 int plen = 0; /* prompt length */
1050 int col; /* output column cnt */
1055 plen = strlen (prompt);
1061 #ifdef CONFIG_BOOT_RETRY_TIME
1062 while (!tstc()) { /* while no incoming data */
1063 if (retry_time >= 0 && get_ticks() > endtime)
1064 return (-2); /* timed out */
1068 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
1070 #ifdef CONFIG_SHOW_ACTIVITY
1079 * Special character handling
1082 case '\r': /* Enter */
1088 case '\0': /* nul */
1091 case 0x03: /* ^C - break */
1092 p_buf[0] = '\0'; /* discard input */
1095 case 0x15: /* ^U - erase line */
1096 while (col > plen) {
1104 case 0x17: /* ^W - erase word */
1105 p=delete_char(p_buf, p, &col, &n, plen);
1106 while ((n > 0) && (*p != ' ')) {
1107 p=delete_char(p_buf, p, &col, &n, plen);
1111 case 0x08: /* ^H - backspace */
1112 case 0x7F: /* DEL - backspace */
1113 p=delete_char(p_buf, p, &col, &n, plen);
1118 * Must be a normal character then
1120 if (n < CONFIG_SYS_CBSIZE-2) {
1121 if (c == '\t') { /* expand TABs */
1122 #ifdef CONFIG_AUTO_COMPLETE
1123 /* if auto completion triggered just continue */
1125 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1126 p = p_buf + n; /* reset */
1130 puts (tab_seq+(col&07));
1131 col += 8 - (col&07);
1136 * Echo input using puts() to force am
1137 * LCD flush if we are using an LCD
1146 } else { /* Buffer full */
1151 #ifdef CONFIG_CMDLINE_EDITING
1156 /****************************************************************************/
1158 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1166 if (*(--p) == '\t') { /* will retype the whole line */
1167 while (*colp > plen) {
1171 for (s=buffer; s<p; ++s) {
1173 puts (tab_seq+((*colp) & 07));
1174 *colp += 8 - ((*colp) & 07);
1188 /****************************************************************************/
1190 int parse_line (char *line, char *argv[])
1195 printf ("parse_line: \"%s\"\n", line);
1197 while (nargs < CONFIG_SYS_MAXARGS) {
1199 /* skip any white space */
1200 while (isblank(*line))
1203 if (*line == '\0') { /* end of line, no more args */
1206 printf ("parse_line: nargs=%d\n", nargs);
1211 argv[nargs++] = line; /* begin of argument string */
1213 /* find end of string */
1214 while (*line && !isblank(*line))
1217 if (*line == '\0') { /* end of line, no more args */
1220 printf ("parse_line: nargs=%d\n", nargs);
1225 *line++ = '\0'; /* terminate current arg */
1228 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1231 printf ("parse_line: nargs=%d\n", nargs);
1236 /****************************************************************************/
1238 #ifndef CONFIG_SYS_HUSH_PARSER
1239 static void process_macros (const char *input, char *output)
1242 const char *varname_start = NULL;
1243 int inputcnt = strlen (input);
1244 int outputcnt = CONFIG_SYS_CBSIZE;
1245 int state = 0; /* 0 = waiting for '$' */
1247 /* 1 = waiting for '(' or '{' */
1248 /* 2 = waiting for ')' or '}' */
1249 /* 3 = waiting for ''' */
1251 char *output_start = output;
1253 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1257 prev = '\0'; /* previous character */
1259 while (inputcnt && outputcnt) {
1264 /* remove one level of escape characters */
1265 if ((c == '\\') && (prev != '\\')) {
1266 if (inputcnt-- == 0)
1274 case 0: /* Waiting for (unescaped) $ */
1275 if ((c == '\'') && (prev != '\\')) {
1279 if ((c == '$') && (prev != '\\')) {
1286 case 1: /* Waiting for ( */
1287 if (c == '(' || c == '{') {
1289 varname_start = input;
1301 case 2: /* Waiting for ) */
1302 if (c == ')' || c == '}') {
1304 char envname[CONFIG_SYS_CBSIZE], *envval;
1305 int envcnt = input - varname_start - 1; /* Varname # of chars */
1307 /* Get the varname */
1308 for (i = 0; i < envcnt; i++) {
1309 envname[i] = varname_start[i];
1314 envval = getenv (envname);
1316 /* Copy into the line if it exists */
1318 while ((*envval) && outputcnt) {
1319 *(output++) = *(envval++);
1322 /* Look for another '$' */
1326 case 3: /* Waiting for ' */
1327 if ((c == '\'') && (prev != '\\')) {
1344 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1345 strlen (output_start), output_start);
1349 /****************************************************************************
1351 * 1 - command executed, repeatable
1352 * 0 - command executed but not repeatable, interrupted commands are
1353 * always considered not repeatable
1354 * -1 - not executed (unrecognized, bootd recursion or too many args)
1355 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1356 * considered unrecognized)
1360 * We must create a temporary copy of the command since the command we get
1361 * may be the result from getenv(), which returns a pointer directly to
1362 * the environment data, which may change magicly when the command we run
1363 * creates or modifies environment variables (like "bootp" does).
1365 static int builtin_run_command(const char *cmd, int flag)
1367 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */
1368 char *token; /* start of token in cmdbuf */
1369 char *sep; /* end of token (separator) in cmdbuf */
1370 char finaltoken[CONFIG_SYS_CBSIZE];
1372 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
1378 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1379 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */
1383 clear_ctrlc(); /* forget any previous Control C */
1385 if (!cmd || !*cmd) {
1386 return -1; /* empty command */
1389 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1390 puts ("## Command too long!\n");
1394 strcpy (cmdbuf, cmd);
1396 /* Process separators and check for invalid
1397 * repeatable commands
1401 printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1406 * Find separator, or string end
1407 * Allow simple escape of ';' by writing "\;"
1409 for (inquotes = 0, sep = str; *sep; sep++) {
1415 (*sep == ';') && /* separator */
1416 ( sep != str) && /* past string start */
1417 (*(sep-1) != '\\')) /* and NOT escaped */
1422 * Limit the token to data between separators
1426 str = sep + 1; /* start of command for next pass */
1430 str = sep; /* no more commands for next pass */
1432 printf ("token: \"%s\"\n", token);
1435 /* find macros in this token and replace them */
1436 process_macros (token, finaltoken);
1438 /* Extract arguments */
1439 if ((argc = parse_line (finaltoken, argv)) == 0) {
1440 rc = -1; /* no command at all */
1444 if (cmd_process(flag, argc, argv, &repeatable, NULL))
1447 /* Did the user stop this? */
1449 return -1; /* if stopped then not repeatable */
1452 return rc ? rc : repeatable;
1457 * Run a command using the selected parser.
1459 * @param cmd Command to run
1460 * @param flag Execution flags (CMD_FLAG_...)
1461 * @return 0 on success, or != 0 on error.
1463 int run_command(const char *cmd, int flag)
1465 #ifndef CONFIG_SYS_HUSH_PARSER
1467 * builtin_run_command can return 0 or 1 for success, so clean up
1470 if (builtin_run_command(cmd, flag) == -1)
1475 return parse_string_outer(cmd,
1476 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
1480 #ifndef CONFIG_SYS_HUSH_PARSER
1482 * Execute a list of command separated by ; or \n using the built-in parser.
1484 * This function cannot take a const char * for the command, since if it
1485 * finds newlines in the string, it replaces them with \0.
1487 * @param cmd String containing list of commands
1488 * @param flag Execution flags (CMD_FLAG_...)
1489 * @return 0 on success, or != 0 on error.
1491 static int builtin_run_command_list(char *cmd, int flag)
1497 * Break into individual lines, and execute each line; terminate on
1502 if (*next == '\n') {
1504 /* run only non-empty commands */
1506 debug("** exec: \"%s\"\n", line);
1507 if (builtin_run_command(line, 0) < 0) {
1516 if (rcode == 0 && *line)
1517 rcode = (builtin_run_command(line, 0) >= 0);
1523 int run_command_list(const char *cmd, int len, int flag)
1526 char *buff = (char *)cmd; /* cast away const */
1531 #ifdef CONFIG_SYS_HUSH_PARSER
1532 /* hush will never change our string */
1535 /* the built-in parser will change our string if it sees \n */
1536 need_buff = strchr(cmd, '\n') != NULL;
1540 buff = malloc(len + 1);
1543 memcpy(buff, cmd, len);
1546 #ifdef CONFIG_SYS_HUSH_PARSER
1547 rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON);
1550 * This function will overwrite any \n it sees with a \0, which
1551 * is why it can't work with a const char *. Here we are making
1552 * using of internal knowledge of this function, to avoid always
1553 * doing a malloc() which is actually required only in a case that
1556 rcode = builtin_run_command_list(buff, flag);
1564 /****************************************************************************/
1566 #if defined(CONFIG_CMD_RUN)
1567 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1572 return CMD_RET_USAGE;
1574 for (i=1; i<argc; ++i) {
1577 if ((arg = getenv (argv[i])) == NULL) {
1578 printf ("## Error: \"%s\" not defined\n", argv[i]);
1582 if (run_command(arg, flag) != 0)