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,
39 #include <linux/ctype.h>
41 DECLARE_GLOBAL_DATA_PTR;
44 * Board-specific Platform code can reimplement show_boot_progress () if needed
46 void inline __show_boot_progress (int val) {}
47 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
49 #define MAX_DELAY_STOP_STR 32
51 #define DEBUG_PARSER 0 /* set to 1 to debug */
53 #define debug_parser(fmt, args...) \
54 debug_cond(DEBUG_PARSER, fmt, ##args)
56 #ifndef DEBUG_BOOTKEYS
57 #define DEBUG_BOOTKEYS 0
59 #define debug_bootkeys(fmt, args...) \
60 debug_cond(DEBUG_BOOTKEYS, fmt, ##args)
62 char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */
64 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
65 static const char erase_seq[] = "\b \b"; /* erase sequence */
66 static const char tab_seq[] = " "; /* used to expand TABs */
68 #ifdef CONFIG_BOOT_RETRY_TIME
69 static uint64_t endtime = 0; /* must be set, default is instant timeout */
70 static int retry_time = -1; /* -1 so can call readline before main_loop */
73 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
75 #ifndef CONFIG_BOOT_RETRY_MIN
76 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
79 #ifdef CONFIG_MODEM_SUPPORT
81 extern void mdm_init(void); /* defined in board.c */
84 /***************************************************************************
85 * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
86 * returns: 0 - no key string, allow autoboot 1 - got key string, abort
88 #if defined(CONFIG_BOOTDELAY)
89 # if defined(CONFIG_AUTOBOOT_KEYED)
90 static int abortboot_keyed(int bootdelay)
93 uint64_t etime = endtick(bootdelay);
100 { str: getenv ("bootdelaykey"), retry: 1 },
101 { str: getenv ("bootdelaykey2"), retry: 1 },
102 { str: getenv ("bootstopkey"), retry: 0 },
103 { str: getenv ("bootstopkey2"), retry: 0 },
106 char presskey [MAX_DELAY_STOP_STR];
107 u_int presskey_len = 0;
108 u_int presskey_max = 0;
111 #ifndef CONFIG_ZERO_BOOTDELAY_CHECK
116 # ifdef CONFIG_AUTOBOOT_PROMPT
117 printf(CONFIG_AUTOBOOT_PROMPT);
120 # ifdef CONFIG_AUTOBOOT_DELAY_STR
121 if (delaykey[0].str == NULL)
122 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
124 # ifdef CONFIG_AUTOBOOT_DELAY_STR2
125 if (delaykey[1].str == NULL)
126 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
128 # ifdef CONFIG_AUTOBOOT_STOP_STR
129 if (delaykey[2].str == NULL)
130 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
132 # ifdef CONFIG_AUTOBOOT_STOP_STR2
133 if (delaykey[3].str == NULL)
134 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
137 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
138 delaykey[i].len = delaykey[i].str == NULL ?
139 0 : strlen (delaykey[i].str);
140 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
141 MAX_DELAY_STOP_STR : delaykey[i].len;
143 presskey_max = presskey_max > delaykey[i].len ?
144 presskey_max : delaykey[i].len;
146 debug_bootkeys("%s key:<%s>\n",
147 delaykey[i].retry ? "delay" : "stop",
148 delaykey[i].str ? delaykey[i].str : "NULL");
151 /* In order to keep up with incoming data, check timeout only
156 if (presskey_len < presskey_max) {
157 presskey [presskey_len ++] = getc();
160 for (i = 0; i < presskey_max - 1; i ++)
161 presskey [i] = presskey [i + 1];
163 presskey [i] = getc();
167 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
168 if (delaykey[i].len > 0 &&
169 presskey_len >= delaykey[i].len &&
170 memcmp (presskey + presskey_len - delaykey[i].len,
172 delaykey[i].len) == 0) {
173 debug_bootkeys("got %skey\n",
174 delaykey[i].retry ? "delay" :
177 # ifdef CONFIG_BOOT_RETRY_TIME
178 /* don't retry auto boot */
179 if (! delaykey[i].retry)
185 } while (!abort && get_ticks() <= etime);
188 debug_bootkeys("key timeout\n");
190 #ifdef CONFIG_SILENT_CONSOLE
192 gd->flags &= ~GD_FLG_SILENT;
198 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */
200 #ifdef CONFIG_MENUKEY
201 static int menukey = 0;
204 static int abortboot_normal(int bootdelay)
209 #ifdef CONFIG_MENUPROMPT
210 printf(CONFIG_MENUPROMPT);
213 printf("Hit any key to stop autoboot: %2d ", bootdelay);
216 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
218 * Check if key already pressed
219 * Don't check if bootdelay < 0
221 if (bootdelay >= 0) {
222 if (tstc()) { /* we got a key press */
223 (void) getc(); /* consume input */
225 abort = 1; /* don't auto boot */
230 while ((bootdelay > 0) && (!abort)) {
235 if (tstc()) { /* we got a key press */
236 abort = 1; /* don't auto boot */
237 bootdelay = 0; /* no more delay */
238 # ifdef CONFIG_MENUKEY
241 (void) getc(); /* consume input */
246 } while (!abort && get_timer(ts) < 1000);
248 printf("\b\b\b%2d ", bootdelay);
253 #ifdef CONFIG_SILENT_CONSOLE
255 gd->flags &= ~GD_FLG_SILENT;
260 # endif /* CONFIG_AUTOBOOT_KEYED */
262 static int abortboot(int bootdelay)
264 #ifdef CONFIG_AUTOBOOT_KEYED
265 return abortboot_keyed(bootdelay);
267 return abortboot_normal(bootdelay);
270 #endif /* CONFIG_BOOTDELAY */
273 * Runs the given boot command securely. Specifically:
274 * - Doesn't run the command with the shell (run_command or parse_string_outer),
275 * since that's a lot of code surface that an attacker might exploit.
276 * Because of this, we don't do any argument parsing--the secure boot command
277 * has to be a full-fledged u-boot command.
278 * - Doesn't check for keypresses before booting, since that could be a
279 * security hole; also disables Ctrl-C.
280 * - Doesn't allow the command to return.
282 * Upon any failures, this function will drop into an infinite loop after
283 * printing the error message to console.
286 #if defined(CONFIG_BOOTDELAY) && defined(CONFIG_OF_CONTROL)
287 static void secure_boot_cmd(char *cmd)
293 printf("## Error: Secure boot command not specified\n");
297 /* Disable Ctrl-C just in case some command is used that checks it. */
300 /* Find the command directly. */
301 cmdtp = find_cmd(cmd);
303 printf("## Error: \"%s\" not defined\n", cmd);
307 /* Run the command, forcing no flags and faking argc and argv. */
308 rc = (cmdtp->cmd)(cmdtp, 0, 1, &cmd);
310 /* Shouldn't ever return from boot command. */
311 printf("## Error: \"%s\" returned (code %d)\n", cmd, rc);
315 * Not a whole lot to do here. Rebooting won't help much, since we'll
316 * just end up right back here. Just loop.
321 static void process_fdt_options(const void *blob)
325 /* Add an env variable to point to a kernel payload, if available */
326 addr = fdtdec_get_config_int(gd->fdt_blob, "kernel-offset", 0);
328 setenv_addr("kernaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
330 /* Add an env variable to point to a root disk, if available */
331 addr = fdtdec_get_config_int(gd->fdt_blob, "rootdisk-offset", 0);
333 setenv_addr("rootaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
335 #endif /* CONFIG_OF_CONTROL */
337 #ifdef CONFIG_BOOTDELAY
338 static void process_boot_delay(void)
340 #ifdef CONFIG_OF_CONTROL
345 #ifdef CONFIG_BOOTCOUNT_LIMIT
346 unsigned long bootcount = 0;
347 unsigned long bootlimit = 0;
348 #endif /* CONFIG_BOOTCOUNT_LIMIT */
350 #ifdef CONFIG_BOOTCOUNT_LIMIT
351 bootcount = bootcount_load();
353 bootcount_store (bootcount);
354 setenv_ulong("bootcount", bootcount);
355 bootlimit = getenv_ulong("bootlimit", 10, 0);
356 #endif /* CONFIG_BOOTCOUNT_LIMIT */
358 s = getenv ("bootdelay");
359 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
361 #ifdef CONFIG_OF_CONTROL
362 bootdelay = fdtdec_get_config_int(gd->fdt_blob, "bootdelay",
366 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
368 #if defined(CONFIG_MENU_SHOW)
369 bootdelay = menu_show(bootdelay);
371 # ifdef CONFIG_BOOT_RETRY_TIME
373 # endif /* CONFIG_BOOT_RETRY_TIME */
376 if (gd->flags & GD_FLG_POSTFAIL) {
377 s = getenv("failbootcmd");
380 #endif /* CONFIG_POST */
381 #ifdef CONFIG_BOOTCOUNT_LIMIT
382 if (bootlimit && (bootcount > bootlimit)) {
383 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
384 (unsigned)bootlimit);
385 s = getenv ("altbootcmd");
388 #endif /* CONFIG_BOOTCOUNT_LIMIT */
389 s = getenv ("bootcmd");
390 #ifdef CONFIG_OF_CONTROL
391 /* Allow the fdt to override the boot command */
392 env = fdtdec_get_config_string(gd->fdt_blob, "bootcmd");
396 process_fdt_options(gd->fdt_blob);
399 * If the bootsecure option was chosen, use secure_boot_cmd().
400 * Always use 'env' in this case, since bootsecure requres that the
401 * bootcmd was specified in the FDT too.
403 if (fdtdec_get_config_int(gd->fdt_blob, "bootsecure", 0))
404 secure_boot_cmd(env);
406 #endif /* CONFIG_OF_CONTROL */
408 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
410 if (bootdelay != -1 && s && !abortboot(bootdelay)) {
411 #ifdef CONFIG_AUTOBOOT_KEYED
412 int prev = disable_ctrlc(1); /* disable Control C checking */
415 run_command_list(s, -1, 0);
417 #ifdef CONFIG_AUTOBOOT_KEYED
418 disable_ctrlc(prev); /* restore Control C checking */
422 #ifdef CONFIG_MENUKEY
423 if (menukey == CONFIG_MENUKEY) {
424 s = getenv("menucmd");
426 run_command_list(s, -1, 0);
428 #endif /* CONFIG_MENUKEY */
430 #endif /* CONFIG_BOOTDELAY */
434 #ifndef CONFIG_SYS_HUSH_PARSER
435 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
440 #ifdef CONFIG_PREBOOT
444 bootstage_mark_name(BOOTSTAGE_ID_MAIN_LOOP, "main_loop");
446 #ifdef CONFIG_MODEM_SUPPORT
447 debug("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init);
449 char *str = strdup(getenv("mdm_cmd"));
450 setenv("preboot", str); /* set or delete definition */
453 mdm_init(); /* wait for modem connection */
455 #endif /* CONFIG_MODEM_SUPPORT */
457 #ifdef CONFIG_VERSION_VARIABLE
459 setenv("ver", version_string); /* set version variable */
461 #endif /* CONFIG_VERSION_VARIABLE */
463 #ifdef CONFIG_SYS_HUSH_PARSER
467 #if defined(CONFIG_HUSH_INIT_VAR)
471 #ifdef CONFIG_PREBOOT
472 p = getenv("preboot");
474 # ifdef CONFIG_AUTOBOOT_KEYED
475 int prev = disable_ctrlc(1); /* disable Control C checking */
478 run_command_list(p, -1, 0);
480 # ifdef CONFIG_AUTOBOOT_KEYED
481 disable_ctrlc(prev); /* restore Control C checking */
484 #endif /* CONFIG_PREBOOT */
486 #if defined(CONFIG_UPDATE_TFTP)
488 #endif /* CONFIG_UPDATE_TFTP */
490 #ifdef CONFIG_BOOTDELAY
491 process_boot_delay();
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 an
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[])
1191 debug_parser("parse_line: \"%s\"\n", line);
1192 while (nargs < CONFIG_SYS_MAXARGS) {
1194 /* skip any white space */
1195 while (isblank(*line))
1198 if (*line == '\0') { /* end of line, no more args */
1200 debug_parser("parse_line: nargs=%d\n", nargs);
1204 argv[nargs++] = line; /* begin of argument string */
1206 /* find end of string */
1207 while (*line && !isblank(*line))
1210 if (*line == '\0') { /* end of line, no more args */
1212 debug_parser("parse_line: nargs=%d\n", nargs);
1216 *line++ = '\0'; /* terminate current arg */
1219 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1221 debug_parser("parse_line: nargs=%d\n", nargs);
1225 /****************************************************************************/
1227 #ifndef CONFIG_SYS_HUSH_PARSER
1228 static void process_macros (const char *input, char *output)
1231 const char *varname_start = NULL;
1232 int inputcnt = strlen (input);
1233 int outputcnt = CONFIG_SYS_CBSIZE;
1234 int state = 0; /* 0 = waiting for '$' */
1236 /* 1 = waiting for '(' or '{' */
1237 /* 2 = waiting for ')' or '}' */
1238 /* 3 = waiting for ''' */
1239 char *output_start = output;
1241 debug_parser("[PROCESS_MACROS] INPUT len %zd: \"%s\"\n", strlen(input),
1244 prev = '\0'; /* previous character */
1246 while (inputcnt && outputcnt) {
1251 /* remove one level of escape characters */
1252 if ((c == '\\') && (prev != '\\')) {
1253 if (inputcnt-- == 0)
1261 case 0: /* Waiting for (unescaped) $ */
1262 if ((c == '\'') && (prev != '\\')) {
1266 if ((c == '$') && (prev != '\\')) {
1273 case 1: /* Waiting for ( */
1274 if (c == '(' || c == '{') {
1276 varname_start = input;
1288 case 2: /* Waiting for ) */
1289 if (c == ')' || c == '}') {
1291 char envname[CONFIG_SYS_CBSIZE], *envval;
1292 int envcnt = input - varname_start - 1; /* Varname # of chars */
1294 /* Get the varname */
1295 for (i = 0; i < envcnt; i++) {
1296 envname[i] = varname_start[i];
1301 envval = getenv (envname);
1303 /* Copy into the line if it exists */
1305 while ((*envval) && outputcnt) {
1306 *(output++) = *(envval++);
1309 /* Look for another '$' */
1313 case 3: /* Waiting for ' */
1314 if ((c == '\'') && (prev != '\\')) {
1330 debug_parser("[PROCESS_MACROS] OUTPUT len %zd: \"%s\"\n",
1331 strlen(output_start), output_start);
1334 /****************************************************************************
1336 * 1 - command executed, repeatable
1337 * 0 - command executed but not repeatable, interrupted commands are
1338 * always considered not repeatable
1339 * -1 - not executed (unrecognized, bootd recursion or too many args)
1340 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1341 * considered unrecognized)
1345 * We must create a temporary copy of the command since the command we get
1346 * may be the result from getenv(), which returns a pointer directly to
1347 * the environment data, which may change magicly when the command we run
1348 * creates or modifies environment variables (like "bootp" does).
1350 static int builtin_run_command(const char *cmd, int flag)
1352 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */
1353 char *token; /* start of token in cmdbuf */
1354 char *sep; /* end of token (separator) in cmdbuf */
1355 char finaltoken[CONFIG_SYS_CBSIZE];
1357 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
1362 debug_parser("[RUN_COMMAND] cmd[%p]=\"", cmd);
1364 /* use puts - string may be loooong */
1365 puts(cmd ? cmd : "NULL");
1368 clear_ctrlc(); /* forget any previous Control C */
1370 if (!cmd || !*cmd) {
1371 return -1; /* empty command */
1374 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1375 puts ("## Command too long!\n");
1379 strcpy (cmdbuf, cmd);
1381 /* Process separators and check for invalid
1382 * repeatable commands
1385 debug_parser("[PROCESS_SEPARATORS] %s\n", cmd);
1389 * Find separator, or string end
1390 * Allow simple escape of ';' by writing "\;"
1392 for (inquotes = 0, sep = str; *sep; sep++) {
1398 (*sep == ';') && /* separator */
1399 ( sep != str) && /* past string start */
1400 (*(sep-1) != '\\')) /* and NOT escaped */
1405 * Limit the token to data between separators
1409 str = sep + 1; /* start of command for next pass */
1413 str = sep; /* no more commands for next pass */
1414 debug_parser("token: \"%s\"\n", token);
1416 /* find macros in this token and replace them */
1417 process_macros (token, finaltoken);
1419 /* Extract arguments */
1420 if ((argc = parse_line (finaltoken, argv)) == 0) {
1421 rc = -1; /* no command at all */
1425 if (cmd_process(flag, argc, argv, &repeatable, NULL))
1428 /* Did the user stop this? */
1430 return -1; /* if stopped then not repeatable */
1433 return rc ? rc : repeatable;
1438 * Run a command using the selected parser.
1440 * @param cmd Command to run
1441 * @param flag Execution flags (CMD_FLAG_...)
1442 * @return 0 on success, or != 0 on error.
1444 int run_command(const char *cmd, int flag)
1446 #ifndef CONFIG_SYS_HUSH_PARSER
1448 * builtin_run_command can return 0 or 1 for success, so clean up
1451 if (builtin_run_command(cmd, flag) == -1)
1456 return parse_string_outer(cmd,
1457 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
1461 #ifndef CONFIG_SYS_HUSH_PARSER
1463 * Execute a list of command separated by ; or \n using the built-in parser.
1465 * This function cannot take a const char * for the command, since if it
1466 * finds newlines in the string, it replaces them with \0.
1468 * @param cmd String containing list of commands
1469 * @param flag Execution flags (CMD_FLAG_...)
1470 * @return 0 on success, or != 0 on error.
1472 static int builtin_run_command_list(char *cmd, int flag)
1478 * Break into individual lines, and execute each line; terminate on
1483 if (*next == '\n') {
1485 /* run only non-empty commands */
1487 debug("** exec: \"%s\"\n", line);
1488 if (builtin_run_command(line, 0) < 0) {
1497 if (rcode == 0 && *line)
1498 rcode = (builtin_run_command(line, 0) >= 0);
1504 int run_command_list(const char *cmd, int len, int flag)
1507 char *buff = (char *)cmd; /* cast away const */
1512 #ifdef CONFIG_SYS_HUSH_PARSER
1513 /* hush will never change our string */
1516 /* the built-in parser will change our string if it sees \n */
1517 need_buff = strchr(cmd, '\n') != NULL;
1521 buff = malloc(len + 1);
1524 memcpy(buff, cmd, len);
1527 #ifdef CONFIG_SYS_HUSH_PARSER
1528 rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON);
1531 * This function will overwrite any \n it sees with a \0, which
1532 * is why it can't work with a const char *. Here we are making
1533 * using of internal knowledge of this function, to avoid always
1534 * doing a malloc() which is actually required only in a case that
1537 rcode = builtin_run_command_list(buff, flag);
1545 /****************************************************************************/
1547 #if defined(CONFIG_CMD_RUN)
1548 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1553 return CMD_RET_USAGE;
1555 for (i=1; i<argc; ++i) {
1558 if ((arg = getenv (argv[i])) == NULL) {
1559 printf ("## Error: \"%s\" not defined\n", argv[i]);
1563 if (run_command(arg, flag) != 0)