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)
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 */
344 #ifdef CONFIG_BOOTDELAY
345 static void process_boot_delay(void)
347 #ifdef CONFIG_OF_CONTROL
352 #ifdef CONFIG_BOOTCOUNT_LIMIT
353 unsigned long bootcount = 0;
354 unsigned long bootlimit = 0;
357 #endif /* CONFIG_BOOTCOUNT_LIMIT */
359 #ifdef CONFIG_BOOTCOUNT_LIMIT
360 bootcount = bootcount_load();
362 bootcount_store (bootcount);
363 sprintf (bcs_set, "%lu", bootcount);
364 setenv ("bootcount", bcs_set);
365 bcs = getenv ("bootlimit");
366 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
367 #endif /* CONFIG_BOOTCOUNT_LIMIT */
369 s = getenv ("bootdelay");
370 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
372 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
374 #if defined(CONFIG_MENU_SHOW)
375 bootdelay = menu_show(bootdelay);
377 # ifdef CONFIG_BOOT_RETRY_TIME
379 # endif /* CONFIG_BOOT_RETRY_TIME */
382 if (gd->flags & GD_FLG_POSTFAIL) {
383 s = getenv("failbootcmd");
386 #endif /* CONFIG_POST */
387 #ifdef CONFIG_BOOTCOUNT_LIMIT
388 if (bootlimit && (bootcount > bootlimit)) {
389 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
390 (unsigned)bootlimit);
391 s = getenv ("altbootcmd");
394 #endif /* CONFIG_BOOTCOUNT_LIMIT */
395 s = getenv ("bootcmd");
396 #ifdef CONFIG_OF_CONTROL
397 /* Allow the fdt to override the boot command */
398 env = fdtdec_get_config_string(gd->fdt_blob, "bootcmd");
402 process_fdt_options(gd->fdt_blob);
405 * If the bootsecure option was chosen, use secure_boot_cmd().
406 * Always use 'env' in this case, since bootsecure requres that the
407 * bootcmd was specified in the FDT too.
409 if (fdtdec_get_config_int(gd->fdt_blob, "bootsecure", 0))
410 secure_boot_cmd(env);
412 #endif /* CONFIG_OF_CONTROL */
414 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
416 if (bootdelay != -1 && s && !abortboot(bootdelay)) {
417 #ifdef CONFIG_AUTOBOOT_KEYED
418 int prev = disable_ctrlc(1); /* disable Control C checking */
421 run_command_list(s, -1, 0);
423 #ifdef CONFIG_AUTOBOOT_KEYED
424 disable_ctrlc(prev); /* restore Control C checking */
428 #ifdef CONFIG_MENUKEY
429 if (menukey == CONFIG_MENUKEY) {
430 s = getenv("menucmd");
432 run_command_list(s, -1, 0);
434 #endif /* CONFIG_MENUKEY */
436 #endif /* CONFIG_BOOTDELAY */
440 #ifndef CONFIG_SYS_HUSH_PARSER
441 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
446 #ifdef CONFIG_PREBOOT
450 bootstage_mark_name(BOOTSTAGE_ID_MAIN_LOOP, "main_loop");
452 #ifdef CONFIG_MODEM_SUPPORT
453 debug("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init);
455 char *str = strdup(getenv("mdm_cmd"));
456 setenv("preboot", str); /* set or delete definition */
459 mdm_init(); /* wait for modem connection */
461 #endif /* CONFIG_MODEM_SUPPORT */
463 #ifdef CONFIG_VERSION_VARIABLE
465 setenv("ver", version_string); /* set version variable */
467 #endif /* CONFIG_VERSION_VARIABLE */
469 #ifdef CONFIG_SYS_HUSH_PARSER
473 #if defined(CONFIG_HUSH_INIT_VAR)
477 #ifdef CONFIG_PREBOOT
478 p = getenv("preboot");
480 # ifdef CONFIG_AUTOBOOT_KEYED
481 int prev = disable_ctrlc(1); /* disable Control C checking */
484 run_command_list(p, -1, 0);
486 # ifdef CONFIG_AUTOBOOT_KEYED
487 disable_ctrlc(prev); /* restore Control C checking */
490 #endif /* CONFIG_PREBOOT */
492 #if defined(CONFIG_UPDATE_TFTP)
494 #endif /* CONFIG_UPDATE_TFTP */
496 #ifdef CONFIG_BOOTDELAY
497 process_boot_delay();
500 * Main Loop for Monitor Command Processing
502 #ifdef CONFIG_SYS_HUSH_PARSER
504 /* This point is never reached */
508 #ifdef CONFIG_BOOT_RETRY_TIME
510 /* Saw enough of a valid command to
511 * restart the timeout.
516 len = readline (CONFIG_SYS_PROMPT);
518 flag = 0; /* assume no special flags for now */
520 strcpy (lastcommand, console_buffer);
522 flag |= CMD_FLAG_REPEAT;
523 #ifdef CONFIG_BOOT_RETRY_TIME
524 else if (len == -2) {
525 /* -2 means timed out, retry autoboot
527 puts ("\nTimed out waiting for command\n");
528 # ifdef CONFIG_RESET_TO_RETRY
529 /* Reinit board to run initialization code again */
530 do_reset (NULL, 0, 0, NULL);
532 return; /* retry autoboot */
538 puts ("<INTERRUPT>\n");
540 rc = run_command(lastcommand, flag);
543 /* invalid command or not repeatable, forget it */
547 #endif /*CONFIG_SYS_HUSH_PARSER*/
550 #ifdef CONFIG_BOOT_RETRY_TIME
551 /***************************************************************************
552 * initialize command line timeout
554 void init_cmd_timeout(void)
556 char *s = getenv ("bootretry");
559 retry_time = (int)simple_strtol(s, NULL, 10);
561 retry_time = CONFIG_BOOT_RETRY_TIME;
563 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
564 retry_time = CONFIG_BOOT_RETRY_MIN;
567 /***************************************************************************
568 * reset command line timeout to retry_time seconds
570 void reset_cmd_timeout(void)
572 endtime = endtick(retry_time);
576 #ifdef CONFIG_CMDLINE_EDITING
579 * cmdline-editing related codes from vivi.
580 * Author: Janghoon Lyu <nandy@mizi.com>
583 #define putnstr(str,n) do { \
584 printf ("%.*s", (int)n, str); \
587 #define CTL_CH(c) ((c) - 'a' + 1)
588 #define CTL_BACKSPACE ('\b')
589 #define DEL ((char)255)
590 #define DEL7 ((char)127)
591 #define CREAD_HIST_CHAR ('!')
593 #define getcmd_putch(ch) putc(ch)
594 #define getcmd_getch() getc()
595 #define getcmd_cbeep() getcmd_putch('\a')
598 #define HIST_SIZE CONFIG_SYS_CBSIZE
601 static int hist_add_idx;
602 static int hist_cur = -1;
603 static unsigned hist_num;
605 static char *hist_list[HIST_MAX];
606 static char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */
608 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
610 static void hist_init(void)
619 for (i = 0; i < HIST_MAX; i++) {
620 hist_list[i] = hist_lines[i];
621 hist_list[i][0] = '\0';
625 static void cread_add_to_hist(char *line)
627 strcpy(hist_list[hist_add_idx], line);
629 if (++hist_add_idx >= HIST_MAX)
632 if (hist_add_idx > hist_max)
633 hist_max = hist_add_idx;
638 static char* hist_prev(void)
650 if (hist_cur == hist_add_idx) {
654 ret = hist_list[hist_cur];
659 static char* hist_next(void)
666 if (hist_cur == hist_add_idx)
669 if (++hist_cur > hist_max)
672 if (hist_cur == hist_add_idx) {
675 ret = hist_list[hist_cur];
680 #ifndef CONFIG_CMDLINE_EDITING
681 static void cread_print_hist_list(void)
686 n = hist_num - hist_max;
688 i = hist_add_idx + 1;
692 if (i == hist_add_idx)
694 printf("%s\n", hist_list[i]);
699 #endif /* CONFIG_CMDLINE_EDITING */
701 #define BEGINNING_OF_LINE() { \
703 getcmd_putch(CTL_BACKSPACE); \
708 #define ERASE_TO_EOL() { \
709 if (num < eol_num) { \
710 printf("%*s", (int)(eol_num - num), ""); \
712 getcmd_putch(CTL_BACKSPACE); \
713 } while (--eol_num > num); \
717 #define REFRESH_TO_EOL() { \
718 if (num < eol_num) { \
719 wlen = eol_num - num; \
720 putnstr(buf + num, wlen); \
725 static void cread_add_char(char ichar, int insert, unsigned long *num,
726 unsigned long *eol_num, char *buf, unsigned long len)
731 if (insert || *num == *eol_num) {
732 if (*eol_num > len - 1) {
740 wlen = *eol_num - *num;
742 memmove(&buf[*num+1], &buf[*num], wlen-1);
746 putnstr(buf + *num, wlen);
749 getcmd_putch(CTL_BACKSPACE);
752 /* echo the character */
755 putnstr(buf + *num, wlen);
760 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
761 unsigned long *eol_num, char *buf, unsigned long len)
764 cread_add_char(*str, insert, num, eol_num, buf, len);
769 static int cread_line(const char *const prompt, char *buf, unsigned int *len,
772 unsigned long num = 0;
773 unsigned long eol_num = 0;
779 int init_len = strlen(buf);
783 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
786 #ifdef CONFIG_BOOT_RETRY_TIME
787 while (!tstc()) { /* while no incoming data */
788 if (retry_time >= 0 && get_ticks() > endtime)
789 return (-2); /* timed out */
793 if (first && timeout) {
794 uint64_t etime = endtick(timeout);
796 while (!tstc()) { /* while no incoming data */
797 if (get_ticks() >= etime)
798 return -2; /* timed out */
804 ichar = getcmd_getch();
806 if ((ichar == '\n') || (ichar == '\r')) {
812 * handle standard linux xterm esc sequences for arrow key, etc.
817 esc_save[esc_len] = ichar;
820 cread_add_str(esc_save, esc_len, insert,
821 &num, &eol_num, buf, *len);
829 case 'D': /* <- key */
833 case 'C': /* -> key */
836 break; /* pass off to ^F handler */
837 case 'H': /* Home key */
840 break; /* pass off to ^A handler */
841 case 'A': /* up arrow */
844 break; /* pass off to ^P handler */
845 case 'B': /* down arrow */
848 break; /* pass off to ^N handler */
850 esc_save[esc_len++] = ichar;
851 cread_add_str(esc_save, esc_len, insert,
852 &num, &eol_num, buf, *len);
861 esc_save[esc_len] = ichar;
864 puts("impossible condition #876\n");
872 case CTL_CH('c'): /* ^C - break */
873 *buf = '\0'; /* discard input */
877 getcmd_putch(buf[num]);
883 getcmd_putch(CTL_BACKSPACE);
889 wlen = eol_num - num - 1;
891 memmove(&buf[num], &buf[num+1], wlen);
892 putnstr(buf + num, wlen);
897 getcmd_putch(CTL_BACKSPACE);
920 wlen = eol_num - num;
922 memmove(&buf[num], &buf[num+1], wlen);
923 getcmd_putch(CTL_BACKSPACE);
924 putnstr(buf + num, wlen);
927 getcmd_putch(CTL_BACKSPACE);
939 if (ichar == CTL_CH('p'))
949 /* nuke the current line */
953 /* erase to end of line */
956 /* copy new line into place and display */
958 eol_num = strlen(buf);
962 #ifdef CONFIG_AUTO_COMPLETE
966 /* do not autocomplete when in the middle */
973 col = strlen(prompt) + eol_num;
975 if (cmd_auto_complete(prompt, buf, &num2, &col)) {
984 cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
989 buf[eol_num] = '\0'; /* lose the newline */
991 if (buf[0] && buf[0] != CREAD_HIST_CHAR)
992 cread_add_to_hist(buf);
993 hist_cur = hist_add_idx;
998 #endif /* CONFIG_CMDLINE_EDITING */
1000 /****************************************************************************/
1003 * Prompt for input and read a line.
1004 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
1005 * time out when time goes past endtime (timebase time in ticks).
1006 * Return: number of read characters
1010 int readline (const char *const prompt)
1013 * If console_buffer isn't 0-length the user will be prompted to modify
1014 * it instead of entering it from scratch as desired.
1016 console_buffer[0] = '\0';
1018 return readline_into_buffer(prompt, console_buffer, 0);
1022 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
1025 #ifdef CONFIG_CMDLINE_EDITING
1026 unsigned int len = CONFIG_SYS_CBSIZE;
1028 static int initted = 0;
1031 * History uses a global array which is not
1032 * writable until after relocation to RAM.
1033 * Revert to non-history version if still
1034 * running from flash.
1036 if (gd->flags & GD_FLG_RELOC) {
1045 rc = cread_line(prompt, p, &len, timeout);
1046 return rc < 0 ? rc : len;
1049 #endif /* CONFIG_CMDLINE_EDITING */
1051 int n = 0; /* buffer index */
1052 int plen = 0; /* prompt length */
1053 int col; /* output column cnt */
1058 plen = strlen (prompt);
1064 #ifdef CONFIG_BOOT_RETRY_TIME
1065 while (!tstc()) { /* while no incoming data */
1066 if (retry_time >= 0 && get_ticks() > endtime)
1067 return (-2); /* timed out */
1071 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
1073 #ifdef CONFIG_SHOW_ACTIVITY
1082 * Special character handling
1085 case '\r': /* Enter */
1091 case '\0': /* nul */
1094 case 0x03: /* ^C - break */
1095 p_buf[0] = '\0'; /* discard input */
1098 case 0x15: /* ^U - erase line */
1099 while (col > plen) {
1107 case 0x17: /* ^W - erase word */
1108 p=delete_char(p_buf, p, &col, &n, plen);
1109 while ((n > 0) && (*p != ' ')) {
1110 p=delete_char(p_buf, p, &col, &n, plen);
1114 case 0x08: /* ^H - backspace */
1115 case 0x7F: /* DEL - backspace */
1116 p=delete_char(p_buf, p, &col, &n, plen);
1121 * Must be a normal character then
1123 if (n < CONFIG_SYS_CBSIZE-2) {
1124 if (c == '\t') { /* expand TABs */
1125 #ifdef CONFIG_AUTO_COMPLETE
1126 /* if auto completion triggered just continue */
1128 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1129 p = p_buf + n; /* reset */
1133 puts (tab_seq+(col&07));
1134 col += 8 - (col&07);
1139 * Echo input using puts() to force am
1140 * LCD flush if we are using an LCD
1149 } else { /* Buffer full */
1154 #ifdef CONFIG_CMDLINE_EDITING
1159 /****************************************************************************/
1161 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1169 if (*(--p) == '\t') { /* will retype the whole line */
1170 while (*colp > plen) {
1174 for (s=buffer; s<p; ++s) {
1176 puts (tab_seq+((*colp) & 07));
1177 *colp += 8 - ((*colp) & 07);
1191 /****************************************************************************/
1193 int parse_line (char *line, char *argv[])
1198 printf ("parse_line: \"%s\"\n", line);
1200 while (nargs < CONFIG_SYS_MAXARGS) {
1202 /* skip any white space */
1203 while (isblank(*line))
1206 if (*line == '\0') { /* end of line, no more args */
1209 printf ("parse_line: nargs=%d\n", nargs);
1214 argv[nargs++] = line; /* begin of argument string */
1216 /* find end of string */
1217 while (*line && !isblank(*line))
1220 if (*line == '\0') { /* end of line, no more args */
1223 printf ("parse_line: nargs=%d\n", nargs);
1228 *line++ = '\0'; /* terminate current arg */
1231 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1234 printf ("parse_line: nargs=%d\n", nargs);
1239 /****************************************************************************/
1241 #ifndef CONFIG_SYS_HUSH_PARSER
1242 static void process_macros (const char *input, char *output)
1245 const char *varname_start = NULL;
1246 int inputcnt = strlen (input);
1247 int outputcnt = CONFIG_SYS_CBSIZE;
1248 int state = 0; /* 0 = waiting for '$' */
1250 /* 1 = waiting for '(' or '{' */
1251 /* 2 = waiting for ')' or '}' */
1252 /* 3 = waiting for ''' */
1254 char *output_start = output;
1256 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1260 prev = '\0'; /* previous character */
1262 while (inputcnt && outputcnt) {
1267 /* remove one level of escape characters */
1268 if ((c == '\\') && (prev != '\\')) {
1269 if (inputcnt-- == 0)
1277 case 0: /* Waiting for (unescaped) $ */
1278 if ((c == '\'') && (prev != '\\')) {
1282 if ((c == '$') && (prev != '\\')) {
1289 case 1: /* Waiting for ( */
1290 if (c == '(' || c == '{') {
1292 varname_start = input;
1304 case 2: /* Waiting for ) */
1305 if (c == ')' || c == '}') {
1307 char envname[CONFIG_SYS_CBSIZE], *envval;
1308 int envcnt = input - varname_start - 1; /* Varname # of chars */
1310 /* Get the varname */
1311 for (i = 0; i < envcnt; i++) {
1312 envname[i] = varname_start[i];
1317 envval = getenv (envname);
1319 /* Copy into the line if it exists */
1321 while ((*envval) && outputcnt) {
1322 *(output++) = *(envval++);
1325 /* Look for another '$' */
1329 case 3: /* Waiting for ' */
1330 if ((c == '\'') && (prev != '\\')) {
1347 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1348 strlen (output_start), output_start);
1352 /****************************************************************************
1354 * 1 - command executed, repeatable
1355 * 0 - command executed but not repeatable, interrupted commands are
1356 * always considered not repeatable
1357 * -1 - not executed (unrecognized, bootd recursion or too many args)
1358 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1359 * considered unrecognized)
1363 * We must create a temporary copy of the command since the command we get
1364 * may be the result from getenv(), which returns a pointer directly to
1365 * the environment data, which may change magicly when the command we run
1366 * creates or modifies environment variables (like "bootp" does).
1368 static int builtin_run_command(const char *cmd, int flag)
1370 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */
1371 char *token; /* start of token in cmdbuf */
1372 char *sep; /* end of token (separator) in cmdbuf */
1373 char finaltoken[CONFIG_SYS_CBSIZE];
1375 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
1381 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1382 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */
1386 clear_ctrlc(); /* forget any previous Control C */
1388 if (!cmd || !*cmd) {
1389 return -1; /* empty command */
1392 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1393 puts ("## Command too long!\n");
1397 strcpy (cmdbuf, cmd);
1399 /* Process separators and check for invalid
1400 * repeatable commands
1404 printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1409 * Find separator, or string end
1410 * Allow simple escape of ';' by writing "\;"
1412 for (inquotes = 0, sep = str; *sep; sep++) {
1418 (*sep == ';') && /* separator */
1419 ( sep != str) && /* past string start */
1420 (*(sep-1) != '\\')) /* and NOT escaped */
1425 * Limit the token to data between separators
1429 str = sep + 1; /* start of command for next pass */
1433 str = sep; /* no more commands for next pass */
1435 printf ("token: \"%s\"\n", token);
1438 /* find macros in this token and replace them */
1439 process_macros (token, finaltoken);
1441 /* Extract arguments */
1442 if ((argc = parse_line (finaltoken, argv)) == 0) {
1443 rc = -1; /* no command at all */
1447 if (cmd_process(flag, argc, argv, &repeatable, NULL))
1450 /* Did the user stop this? */
1452 return -1; /* if stopped then not repeatable */
1455 return rc ? rc : repeatable;
1460 * Run a command using the selected parser.
1462 * @param cmd Command to run
1463 * @param flag Execution flags (CMD_FLAG_...)
1464 * @return 0 on success, or != 0 on error.
1466 int run_command(const char *cmd, int flag)
1468 #ifndef CONFIG_SYS_HUSH_PARSER
1470 * builtin_run_command can return 0 or 1 for success, so clean up
1473 if (builtin_run_command(cmd, flag) == -1)
1478 return parse_string_outer(cmd,
1479 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
1483 #ifndef CONFIG_SYS_HUSH_PARSER
1485 * Execute a list of command separated by ; or \n using the built-in parser.
1487 * This function cannot take a const char * for the command, since if it
1488 * finds newlines in the string, it replaces them with \0.
1490 * @param cmd String containing list of commands
1491 * @param flag Execution flags (CMD_FLAG_...)
1492 * @return 0 on success, or != 0 on error.
1494 static int builtin_run_command_list(char *cmd, int flag)
1500 * Break into individual lines, and execute each line; terminate on
1505 if (*next == '\n') {
1507 /* run only non-empty commands */
1509 debug("** exec: \"%s\"\n", line);
1510 if (builtin_run_command(line, 0) < 0) {
1519 if (rcode == 0 && *line)
1520 rcode = (builtin_run_command(line, 0) >= 0);
1526 int run_command_list(const char *cmd, int len, int flag)
1529 char *buff = (char *)cmd; /* cast away const */
1534 #ifdef CONFIG_SYS_HUSH_PARSER
1535 /* hush will never change our string */
1538 /* the built-in parser will change our string if it sees \n */
1539 need_buff = strchr(cmd, '\n') != NULL;
1543 buff = malloc(len + 1);
1546 memcpy(buff, cmd, len);
1549 #ifdef CONFIG_SYS_HUSH_PARSER
1550 rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON);
1553 * This function will overwrite any \n it sees with a \0, which
1554 * is why it can't work with a const char *. Here we are making
1555 * using of internal knowledge of this function, to avoid always
1556 * doing a malloc() which is actually required only in a case that
1559 rcode = builtin_run_command_list(buff, flag);
1567 /****************************************************************************/
1569 #if defined(CONFIG_CMD_RUN)
1570 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1575 return CMD_RET_USAGE;
1577 for (i=1; i<argc; ++i) {
1580 if ((arg = getenv (argv[i])) == NULL) {
1581 printf ("## Error: \"%s\" not defined\n", argv[i]);
1585 if (run_command(arg, flag) != 0)