3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * Add to readline cmdline-editing by
7 * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
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)
95 int abortboot(int bootdelay)
98 uint64_t etime = endtick(bootdelay);
105 { str: getenv ("bootdelaykey"), retry: 1 },
106 { str: getenv ("bootdelaykey2"), retry: 1 },
107 { str: getenv ("bootstopkey"), retry: 0 },
108 { str: getenv ("bootstopkey2"), retry: 0 },
111 char presskey [MAX_DELAY_STOP_STR];
112 u_int presskey_len = 0;
113 u_int presskey_max = 0;
116 #ifndef CONFIG_ZERO_BOOTDELAY_CHECK
121 # ifdef CONFIG_AUTOBOOT_PROMPT
122 printf(CONFIG_AUTOBOOT_PROMPT);
125 # ifdef CONFIG_AUTOBOOT_DELAY_STR
126 if (delaykey[0].str == NULL)
127 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
129 # ifdef CONFIG_AUTOBOOT_DELAY_STR2
130 if (delaykey[1].str == NULL)
131 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
133 # ifdef CONFIG_AUTOBOOT_STOP_STR
134 if (delaykey[2].str == NULL)
135 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
137 # ifdef CONFIG_AUTOBOOT_STOP_STR2
138 if (delaykey[3].str == NULL)
139 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
142 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
143 delaykey[i].len = delaykey[i].str == NULL ?
144 0 : strlen (delaykey[i].str);
145 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
146 MAX_DELAY_STOP_STR : delaykey[i].len;
148 presskey_max = presskey_max > delaykey[i].len ?
149 presskey_max : delaykey[i].len;
152 printf("%s key:<%s>\n",
153 delaykey[i].retry ? "delay" : "stop",
154 delaykey[i].str ? delaykey[i].str : "NULL");
158 /* In order to keep up with incoming data, check timeout only
163 if (presskey_len < presskey_max) {
164 presskey [presskey_len ++] = getc();
167 for (i = 0; i < presskey_max - 1; i ++)
168 presskey [i] = presskey [i + 1];
170 presskey [i] = getc();
174 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
175 if (delaykey[i].len > 0 &&
176 presskey_len >= delaykey[i].len &&
177 memcmp (presskey + presskey_len - delaykey[i].len,
179 delaykey[i].len) == 0) {
181 printf("got %skey\n",
182 delaykey[i].retry ? "delay" : "stop");
185 # ifdef CONFIG_BOOT_RETRY_TIME
186 /* don't retry auto boot */
187 if (! delaykey[i].retry)
193 } while (!abort && get_ticks() <= etime);
197 puts("key timeout\n");
200 #ifdef CONFIG_SILENT_CONSOLE
202 gd->flags &= ~GD_FLG_SILENT;
208 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */
210 #ifdef CONFIG_MENUKEY
211 static int menukey = 0;
217 int abortboot(int bootdelay)
222 #ifdef CONFIG_MENUPROMPT
223 printf(CONFIG_MENUPROMPT);
226 printf("Hit any key to stop autoboot: %2d ", bootdelay);
229 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
231 * Check if key already pressed
232 * Don't check if bootdelay < 0
234 if (bootdelay >= 0) {
235 if (tstc()) { /* we got a key press */
236 (void) getc(); /* consume input */
238 abort = 1; /* don't auto boot */
243 while ((bootdelay > 0) && (!abort)) {
248 if (tstc()) { /* we got a key press */
249 abort = 1; /* don't auto boot */
250 bootdelay = 0; /* no more delay */
251 # ifdef CONFIG_MENUKEY
254 (void) getc(); /* consume input */
259 } while (!abort && get_timer(ts) < 1000);
261 printf("\b\b\b%2d ", bootdelay);
266 #ifdef CONFIG_SILENT_CONSOLE
268 gd->flags &= ~GD_FLG_SILENT;
273 # endif /* CONFIG_AUTOBOOT_KEYED */
274 #endif /* CONFIG_BOOTDELAY */
277 * Runs the given boot command securely. Specifically:
278 * - Doesn't run the command with the shell (run_command or parse_string_outer),
279 * since that's a lot of code surface that an attacker might exploit.
280 * Because of this, we don't do any argument parsing--the secure boot command
281 * has to be a full-fledged u-boot command.
282 * - Doesn't check for keypresses before booting, since that could be a
283 * security hole; also disables Ctrl-C.
284 * - Doesn't allow the command to return.
286 * Upon any failures, this function will drop into an infinite loop after
287 * printing the error message to console.
290 #if defined(CONFIG_BOOTDELAY) && defined(CONFIG_OF_CONTROL)
291 static void secure_boot_cmd(char *cmd)
297 printf("## Error: Secure boot command not specified\n");
301 /* Disable Ctrl-C just in case some command is used that checks it. */
304 /* Find the command directly. */
305 cmdtp = find_cmd(cmd);
307 printf("## Error: \"%s\" not defined\n", cmd);
311 /* Run the command, forcing no flags and faking argc and argv. */
312 rc = (cmdtp->cmd)(cmdtp, 0, 1, &cmd);
314 /* Shouldn't ever return from boot command. */
315 printf("## Error: \"%s\" returned (code %d)\n", cmd, rc);
319 * Not a whole lot to do here. Rebooting won't help much, since we'll
320 * just end up right back here. Just loop.
325 static void process_fdt_options(const void *blob)
329 /* Add an env variable to point to a kernel payload, if available */
330 addr = fdtdec_get_config_int(gd->fdt_blob, "kernel-offset", 0);
332 setenv_addr("kernaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
334 /* Add an env variable to point to a root disk, if available */
335 addr = fdtdec_get_config_int(gd->fdt_blob, "rootdisk-offset", 0);
337 setenv_addr("rootaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
339 #endif /* CONFIG_OF_CONTROL */
342 /****************************************************************************/
344 void main_loop (void)
346 #ifndef CONFIG_SYS_HUSH_PARSER
347 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
352 #if defined(CONFIG_BOOTDELAY) && defined(CONFIG_OF_CONTROL)
355 #if defined(CONFIG_BOOTDELAY)
359 #ifdef CONFIG_PREBOOT
362 #ifdef CONFIG_BOOTCOUNT_LIMIT
363 unsigned long bootcount = 0;
364 unsigned long bootlimit = 0;
367 #endif /* CONFIG_BOOTCOUNT_LIMIT */
369 bootstage_mark_name(BOOTSTAGE_ID_MAIN_LOOP, "main_loop");
371 #ifdef CONFIG_BOOTCOUNT_LIMIT
372 bootcount = bootcount_load();
374 bootcount_store (bootcount);
375 sprintf (bcs_set, "%lu", bootcount);
376 setenv ("bootcount", bcs_set);
377 bcs = getenv ("bootlimit");
378 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
379 #endif /* CONFIG_BOOTCOUNT_LIMIT */
381 #ifdef CONFIG_MODEM_SUPPORT
382 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init);
384 char *str = strdup(getenv("mdm_cmd"));
385 setenv ("preboot", str); /* set or delete definition */
388 mdm_init(); /* wait for modem connection */
390 #endif /* CONFIG_MODEM_SUPPORT */
392 #ifdef CONFIG_VERSION_VARIABLE
394 setenv ("ver", version_string); /* set version variable */
396 #endif /* CONFIG_VERSION_VARIABLE */
398 #ifdef CONFIG_SYS_HUSH_PARSER
399 u_boot_hush_start ();
402 #if defined(CONFIG_HUSH_INIT_VAR)
406 #ifdef CONFIG_PREBOOT
407 if ((p = getenv ("preboot")) != NULL) {
408 # ifdef CONFIG_AUTOBOOT_KEYED
409 int prev = disable_ctrlc(1); /* disable Control C checking */
412 run_command_list(p, -1, 0);
414 # ifdef CONFIG_AUTOBOOT_KEYED
415 disable_ctrlc(prev); /* restore Control C checking */
418 #endif /* CONFIG_PREBOOT */
420 #if defined(CONFIG_UPDATE_TFTP)
422 #endif /* CONFIG_UPDATE_TFTP */
424 #if defined(CONFIG_BOOTDELAY)
425 s = getenv ("bootdelay");
426 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
428 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
430 #if defined(CONFIG_MENU_SHOW)
431 bootdelay = menu_show(bootdelay);
433 # ifdef CONFIG_BOOT_RETRY_TIME
435 # endif /* CONFIG_BOOT_RETRY_TIME */
438 if (gd->flags & GD_FLG_POSTFAIL) {
439 s = getenv("failbootcmd");
442 #endif /* CONFIG_POST */
443 #ifdef CONFIG_BOOTCOUNT_LIMIT
444 if (bootlimit && (bootcount > bootlimit)) {
445 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
446 (unsigned)bootlimit);
447 s = getenv ("altbootcmd");
450 #endif /* CONFIG_BOOTCOUNT_LIMIT */
451 s = getenv ("bootcmd");
452 #ifdef CONFIG_OF_CONTROL
453 /* Allow the fdt to override the boot command */
454 env = fdtdec_get_config_string(gd->fdt_blob, "bootcmd");
458 process_fdt_options(gd->fdt_blob);
461 * If the bootsecure option was chosen, use secure_boot_cmd().
462 * Always use 'env' in this case, since bootsecure requres that the
463 * bootcmd was specified in the FDT too.
465 if (fdtdec_get_config_int(gd->fdt_blob, "bootsecure", 0))
466 secure_boot_cmd(env);
468 #endif /* CONFIG_OF_CONTROL */
470 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
472 if (bootdelay != -1 && s && !abortboot(bootdelay)) {
473 # ifdef CONFIG_AUTOBOOT_KEYED
474 int prev = disable_ctrlc(1); /* disable Control C checking */
477 run_command_list(s, -1, 0);
479 # ifdef CONFIG_AUTOBOOT_KEYED
480 disable_ctrlc(prev); /* restore Control C checking */
484 # ifdef CONFIG_MENUKEY
485 if (menukey == CONFIG_MENUKEY) {
486 s = getenv("menucmd");
488 run_command_list(s, -1, 0);
490 #endif /* CONFIG_MENUKEY */
491 #endif /* CONFIG_BOOTDELAY */
494 * Main Loop for Monitor Command Processing
496 #ifdef CONFIG_SYS_HUSH_PARSER
498 /* This point is never reached */
502 #ifdef CONFIG_BOOT_RETRY_TIME
504 /* Saw enough of a valid command to
505 * restart the timeout.
510 len = readline (CONFIG_SYS_PROMPT);
512 flag = 0; /* assume no special flags for now */
514 strcpy (lastcommand, console_buffer);
516 flag |= CMD_FLAG_REPEAT;
517 #ifdef CONFIG_BOOT_RETRY_TIME
518 else if (len == -2) {
519 /* -2 means timed out, retry autoboot
521 puts ("\nTimed out waiting for command\n");
522 # ifdef CONFIG_RESET_TO_RETRY
523 /* Reinit board to run initialization code again */
524 do_reset (NULL, 0, 0, NULL);
526 return; /* retry autoboot */
532 puts ("<INTERRUPT>\n");
534 rc = run_command(lastcommand, flag);
537 /* invalid command or not repeatable, forget it */
541 #endif /*CONFIG_SYS_HUSH_PARSER*/
544 #ifdef CONFIG_BOOT_RETRY_TIME
545 /***************************************************************************
546 * initialize command line timeout
548 void init_cmd_timeout(void)
550 char *s = getenv ("bootretry");
553 retry_time = (int)simple_strtol(s, NULL, 10);
555 retry_time = CONFIG_BOOT_RETRY_TIME;
557 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
558 retry_time = CONFIG_BOOT_RETRY_MIN;
561 /***************************************************************************
562 * reset command line timeout to retry_time seconds
564 void reset_cmd_timeout(void)
566 endtime = endtick(retry_time);
570 #ifdef CONFIG_CMDLINE_EDITING
573 * cmdline-editing related codes from vivi.
574 * Author: Janghoon Lyu <nandy@mizi.com>
577 #define putnstr(str,n) do { \
578 printf ("%.*s", (int)n, str); \
581 #define CTL_CH(c) ((c) - 'a' + 1)
582 #define CTL_BACKSPACE ('\b')
583 #define DEL ((char)255)
584 #define DEL7 ((char)127)
585 #define CREAD_HIST_CHAR ('!')
587 #define getcmd_putch(ch) putc(ch)
588 #define getcmd_getch() getc()
589 #define getcmd_cbeep() getcmd_putch('\a')
592 #define HIST_SIZE CONFIG_SYS_CBSIZE
595 static int hist_add_idx;
596 static int hist_cur = -1;
597 static unsigned hist_num;
599 static char *hist_list[HIST_MAX];
600 static char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */
602 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
604 static void hist_init(void)
613 for (i = 0; i < HIST_MAX; i++) {
614 hist_list[i] = hist_lines[i];
615 hist_list[i][0] = '\0';
619 static void cread_add_to_hist(char *line)
621 strcpy(hist_list[hist_add_idx], line);
623 if (++hist_add_idx >= HIST_MAX)
626 if (hist_add_idx > hist_max)
627 hist_max = hist_add_idx;
632 static char* hist_prev(void)
644 if (hist_cur == hist_add_idx) {
648 ret = hist_list[hist_cur];
653 static char* hist_next(void)
660 if (hist_cur == hist_add_idx)
663 if (++hist_cur > hist_max)
666 if (hist_cur == hist_add_idx) {
669 ret = hist_list[hist_cur];
674 #ifndef CONFIG_CMDLINE_EDITING
675 static void cread_print_hist_list(void)
680 n = hist_num - hist_max;
682 i = hist_add_idx + 1;
686 if (i == hist_add_idx)
688 printf("%s\n", hist_list[i]);
693 #endif /* CONFIG_CMDLINE_EDITING */
695 #define BEGINNING_OF_LINE() { \
697 getcmd_putch(CTL_BACKSPACE); \
702 #define ERASE_TO_EOL() { \
703 if (num < eol_num) { \
704 printf("%*s", (int)(eol_num - num), ""); \
706 getcmd_putch(CTL_BACKSPACE); \
707 } while (--eol_num > num); \
711 #define REFRESH_TO_EOL() { \
712 if (num < eol_num) { \
713 wlen = eol_num - num; \
714 putnstr(buf + num, wlen); \
719 static void cread_add_char(char ichar, int insert, unsigned long *num,
720 unsigned long *eol_num, char *buf, unsigned long len)
725 if (insert || *num == *eol_num) {
726 if (*eol_num > len - 1) {
734 wlen = *eol_num - *num;
736 memmove(&buf[*num+1], &buf[*num], wlen-1);
740 putnstr(buf + *num, wlen);
743 getcmd_putch(CTL_BACKSPACE);
746 /* echo the character */
749 putnstr(buf + *num, wlen);
754 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
755 unsigned long *eol_num, char *buf, unsigned long len)
758 cread_add_char(*str, insert, num, eol_num, buf, len);
763 static int cread_line(const char *const prompt, char *buf, unsigned int *len,
766 unsigned long num = 0;
767 unsigned long eol_num = 0;
773 int init_len = strlen(buf);
777 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
780 #ifdef CONFIG_BOOT_RETRY_TIME
781 while (!tstc()) { /* while no incoming data */
782 if (retry_time >= 0 && get_ticks() > endtime)
783 return (-2); /* timed out */
787 if (first && timeout) {
788 uint64_t etime = endtick(timeout);
790 while (!tstc()) { /* while no incoming data */
791 if (get_ticks() >= etime)
792 return -2; /* timed out */
798 ichar = getcmd_getch();
800 if ((ichar == '\n') || (ichar == '\r')) {
806 * handle standard linux xterm esc sequences for arrow key, etc.
811 esc_save[esc_len] = ichar;
814 cread_add_str(esc_save, esc_len, insert,
815 &num, &eol_num, buf, *len);
823 case 'D': /* <- key */
827 case 'C': /* -> key */
830 break; /* pass off to ^F handler */
831 case 'H': /* Home key */
834 break; /* pass off to ^A handler */
835 case 'A': /* up arrow */
838 break; /* pass off to ^P handler */
839 case 'B': /* down arrow */
842 break; /* pass off to ^N handler */
844 esc_save[esc_len++] = ichar;
845 cread_add_str(esc_save, esc_len, insert,
846 &num, &eol_num, buf, *len);
855 esc_save[esc_len] = ichar;
858 puts("impossible condition #876\n");
866 case CTL_CH('c'): /* ^C - break */
867 *buf = '\0'; /* discard input */
871 getcmd_putch(buf[num]);
877 getcmd_putch(CTL_BACKSPACE);
883 wlen = eol_num - num - 1;
885 memmove(&buf[num], &buf[num+1], wlen);
886 putnstr(buf + num, wlen);
891 getcmd_putch(CTL_BACKSPACE);
914 wlen = eol_num - num;
916 memmove(&buf[num], &buf[num+1], wlen);
917 getcmd_putch(CTL_BACKSPACE);
918 putnstr(buf + num, wlen);
921 getcmd_putch(CTL_BACKSPACE);
933 if (ichar == CTL_CH('p'))
943 /* nuke the current line */
947 /* erase to end of line */
950 /* copy new line into place and display */
952 eol_num = strlen(buf);
956 #ifdef CONFIG_AUTO_COMPLETE
960 /* do not autocomplete when in the middle */
967 col = strlen(prompt) + eol_num;
969 if (cmd_auto_complete(prompt, buf, &num2, &col)) {
978 cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
983 buf[eol_num] = '\0'; /* lose the newline */
985 if (buf[0] && buf[0] != CREAD_HIST_CHAR)
986 cread_add_to_hist(buf);
987 hist_cur = hist_add_idx;
992 #endif /* CONFIG_CMDLINE_EDITING */
994 /****************************************************************************/
997 * Prompt for input and read a line.
998 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
999 * time out when time goes past endtime (timebase time in ticks).
1000 * Return: number of read characters
1004 int readline (const char *const prompt)
1007 * If console_buffer isn't 0-length the user will be prompted to modify
1008 * it instead of entering it from scratch as desired.
1010 console_buffer[0] = '\0';
1012 return readline_into_buffer(prompt, console_buffer, 0);
1016 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
1019 #ifdef CONFIG_CMDLINE_EDITING
1020 unsigned int len = CONFIG_SYS_CBSIZE;
1022 static int initted = 0;
1025 * History uses a global array which is not
1026 * writable until after relocation to RAM.
1027 * Revert to non-history version if still
1028 * running from flash.
1030 if (gd->flags & GD_FLG_RELOC) {
1039 rc = cread_line(prompt, p, &len, timeout);
1040 return rc < 0 ? rc : len;
1043 #endif /* CONFIG_CMDLINE_EDITING */
1045 int n = 0; /* buffer index */
1046 int plen = 0; /* prompt length */
1047 int col; /* output column cnt */
1052 plen = strlen (prompt);
1058 #ifdef CONFIG_BOOT_RETRY_TIME
1059 while (!tstc()) { /* while no incoming data */
1060 if (retry_time >= 0 && get_ticks() > endtime)
1061 return (-2); /* timed out */
1065 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
1067 #ifdef CONFIG_SHOW_ACTIVITY
1076 * Special character handling
1079 case '\r': /* Enter */
1085 case '\0': /* nul */
1088 case 0x03: /* ^C - break */
1089 p_buf[0] = '\0'; /* discard input */
1092 case 0x15: /* ^U - erase line */
1093 while (col > plen) {
1101 case 0x17: /* ^W - erase word */
1102 p=delete_char(p_buf, p, &col, &n, plen);
1103 while ((n > 0) && (*p != ' ')) {
1104 p=delete_char(p_buf, p, &col, &n, plen);
1108 case 0x08: /* ^H - backspace */
1109 case 0x7F: /* DEL - backspace */
1110 p=delete_char(p_buf, p, &col, &n, plen);
1115 * Must be a normal character then
1117 if (n < CONFIG_SYS_CBSIZE-2) {
1118 if (c == '\t') { /* expand TABs */
1119 #ifdef CONFIG_AUTO_COMPLETE
1120 /* if auto completion triggered just continue */
1122 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1123 p = p_buf + n; /* reset */
1127 puts (tab_seq+(col&07));
1128 col += 8 - (col&07);
1133 * Echo input using puts() to force am
1134 * LCD flush if we are using an LCD
1143 } else { /* Buffer full */
1148 #ifdef CONFIG_CMDLINE_EDITING
1153 /****************************************************************************/
1155 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1163 if (*(--p) == '\t') { /* will retype the whole line */
1164 while (*colp > plen) {
1168 for (s=buffer; s<p; ++s) {
1170 puts (tab_seq+((*colp) & 07));
1171 *colp += 8 - ((*colp) & 07);
1185 /****************************************************************************/
1187 int parse_line (char *line, char *argv[])
1192 printf ("parse_line: \"%s\"\n", line);
1194 while (nargs < CONFIG_SYS_MAXARGS) {
1196 /* skip any white space */
1197 while (isblank(*line))
1200 if (*line == '\0') { /* end of line, no more args */
1203 printf ("parse_line: nargs=%d\n", nargs);
1208 argv[nargs++] = line; /* begin of argument string */
1210 /* find end of string */
1211 while (*line && !isblank(*line))
1214 if (*line == '\0') { /* end of line, no more args */
1217 printf ("parse_line: nargs=%d\n", nargs);
1222 *line++ = '\0'; /* terminate current arg */
1225 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1228 printf ("parse_line: nargs=%d\n", nargs);
1233 /****************************************************************************/
1235 #ifndef CONFIG_SYS_HUSH_PARSER
1236 static void process_macros (const char *input, char *output)
1239 const char *varname_start = NULL;
1240 int inputcnt = strlen (input);
1241 int outputcnt = CONFIG_SYS_CBSIZE;
1242 int state = 0; /* 0 = waiting for '$' */
1244 /* 1 = waiting for '(' or '{' */
1245 /* 2 = waiting for ')' or '}' */
1246 /* 3 = waiting for ''' */
1248 char *output_start = output;
1250 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1254 prev = '\0'; /* previous character */
1256 while (inputcnt && outputcnt) {
1261 /* remove one level of escape characters */
1262 if ((c == '\\') && (prev != '\\')) {
1263 if (inputcnt-- == 0)
1271 case 0: /* Waiting for (unescaped) $ */
1272 if ((c == '\'') && (prev != '\\')) {
1276 if ((c == '$') && (prev != '\\')) {
1283 case 1: /* Waiting for ( */
1284 if (c == '(' || c == '{') {
1286 varname_start = input;
1298 case 2: /* Waiting for ) */
1299 if (c == ')' || c == '}') {
1301 char envname[CONFIG_SYS_CBSIZE], *envval;
1302 int envcnt = input - varname_start - 1; /* Varname # of chars */
1304 /* Get the varname */
1305 for (i = 0; i < envcnt; i++) {
1306 envname[i] = varname_start[i];
1311 envval = getenv (envname);
1313 /* Copy into the line if it exists */
1315 while ((*envval) && outputcnt) {
1316 *(output++) = *(envval++);
1319 /* Look for another '$' */
1323 case 3: /* Waiting for ' */
1324 if ((c == '\'') && (prev != '\\')) {
1341 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1342 strlen (output_start), output_start);
1346 /****************************************************************************
1348 * 1 - command executed, repeatable
1349 * 0 - command executed but not repeatable, interrupted commands are
1350 * always considered not repeatable
1351 * -1 - not executed (unrecognized, bootd recursion or too many args)
1352 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1353 * considered unrecognized)
1357 * We must create a temporary copy of the command since the command we get
1358 * may be the result from getenv(), which returns a pointer directly to
1359 * the environment data, which may change magicly when the command we run
1360 * creates or modifies environment variables (like "bootp" does).
1362 static int builtin_run_command(const char *cmd, int flag)
1364 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */
1365 char *token; /* start of token in cmdbuf */
1366 char *sep; /* end of token (separator) in cmdbuf */
1367 char finaltoken[CONFIG_SYS_CBSIZE];
1369 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
1375 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1376 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */
1380 clear_ctrlc(); /* forget any previous Control C */
1382 if (!cmd || !*cmd) {
1383 return -1; /* empty command */
1386 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1387 puts ("## Command too long!\n");
1391 strcpy (cmdbuf, cmd);
1393 /* Process separators and check for invalid
1394 * repeatable commands
1398 printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1403 * Find separator, or string end
1404 * Allow simple escape of ';' by writing "\;"
1406 for (inquotes = 0, sep = str; *sep; sep++) {
1412 (*sep == ';') && /* separator */
1413 ( sep != str) && /* past string start */
1414 (*(sep-1) != '\\')) /* and NOT escaped */
1419 * Limit the token to data between separators
1423 str = sep + 1; /* start of command for next pass */
1427 str = sep; /* no more commands for next pass */
1429 printf ("token: \"%s\"\n", token);
1432 /* find macros in this token and replace them */
1433 process_macros (token, finaltoken);
1435 /* Extract arguments */
1436 if ((argc = parse_line (finaltoken, argv)) == 0) {
1437 rc = -1; /* no command at all */
1441 if (cmd_process(flag, argc, argv, &repeatable, NULL))
1444 /* Did the user stop this? */
1446 return -1; /* if stopped then not repeatable */
1449 return rc ? rc : repeatable;
1454 * Run a command using the selected parser.
1456 * @param cmd Command to run
1457 * @param flag Execution flags (CMD_FLAG_...)
1458 * @return 0 on success, or != 0 on error.
1460 int run_command(const char *cmd, int flag)
1462 #ifndef CONFIG_SYS_HUSH_PARSER
1464 * builtin_run_command can return 0 or 1 for success, so clean up
1467 if (builtin_run_command(cmd, flag) == -1)
1472 return parse_string_outer(cmd,
1473 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
1477 #ifndef CONFIG_SYS_HUSH_PARSER
1479 * Execute a list of command separated by ; or \n using the built-in parser.
1481 * This function cannot take a const char * for the command, since if it
1482 * finds newlines in the string, it replaces them with \0.
1484 * @param cmd String containing list of commands
1485 * @param flag Execution flags (CMD_FLAG_...)
1486 * @return 0 on success, or != 0 on error.
1488 static int builtin_run_command_list(char *cmd, int flag)
1494 * Break into individual lines, and execute each line; terminate on
1499 if (*next == '\n') {
1501 /* run only non-empty commands */
1503 debug("** exec: \"%s\"\n", line);
1504 if (builtin_run_command(line, 0) < 0) {
1513 if (rcode == 0 && *line)
1514 rcode = (builtin_run_command(line, 0) >= 0);
1520 int run_command_list(const char *cmd, int len, int flag)
1523 char *buff = (char *)cmd; /* cast away const */
1528 #ifdef CONFIG_SYS_HUSH_PARSER
1529 /* hush will never change our string */
1532 /* the built-in parser will change our string if it sees \n */
1533 need_buff = strchr(cmd, '\n') != NULL;
1537 buff = malloc(len + 1);
1540 memcpy(buff, cmd, len);
1543 #ifdef CONFIG_SYS_HUSH_PARSER
1544 rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON);
1547 * This function will overwrite any \n it sees with a \0, which
1548 * is why it can't work with a const char *. Here we are making
1549 * using of internal knowledge of this function, to avoid always
1550 * doing a malloc() which is actually required only in a case that
1553 rcode = builtin_run_command_list(buff, flag);
1561 /****************************************************************************/
1563 #if defined(CONFIG_CMD_RUN)
1564 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1569 return CMD_RET_USAGE;
1571 for (i=1; i<argc; ++i) {
1574 if ((arg = getenv (argv[i])) == NULL) {
1575 printf ("## Error: \"%s\" not defined\n", argv[i]);
1579 if (run_command(arg, flag) != 0)