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,
34 #ifdef CONFIG_MODEM_SUPPORT
35 #include <malloc.h> /* for free() prototype */
38 #ifdef CONFIG_SYS_HUSH_PARSER
43 #include <linux/ctype.h>
46 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
47 DECLARE_GLOBAL_DATA_PTR;
51 * Board-specific Platform code can reimplement show_boot_progress () if needed
53 void inline __show_boot_progress (int val) {}
54 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
56 #if defined(CONFIG_UPDATE_TFTP)
57 int update_tftp (ulong addr);
58 #endif /* CONFIG_UPDATE_TFTP */
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) && (CONFIG_BOOTDELAY >= 0)
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 # 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;
147 printf("%s key:<%s>\n",
148 delaykey[i].retry ? "delay" : "stop",
149 delaykey[i].str ? delaykey[i].str : "NULL");
153 /* In order to keep up with incoming data, check timeout only
158 if (presskey_len < presskey_max) {
159 presskey [presskey_len ++] = getc();
162 for (i = 0; i < presskey_max - 1; i ++)
163 presskey [i] = presskey [i + 1];
165 presskey [i] = getc();
169 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
170 if (delaykey[i].len > 0 &&
171 presskey_len >= delaykey[i].len &&
172 memcmp (presskey + presskey_len - delaykey[i].len,
174 delaykey[i].len) == 0) {
176 printf("got %skey\n",
177 delaykey[i].retry ? "delay" : "stop");
180 # ifdef CONFIG_BOOT_RETRY_TIME
181 /* don't retry auto boot */
182 if (! delaykey[i].retry)
188 } while (!abort && get_ticks() <= etime);
192 puts("key timeout\n");
195 #ifdef CONFIG_SILENT_CONSOLE
197 gd->flags &= ~GD_FLG_SILENT;
203 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */
205 #ifdef CONFIG_MENUKEY
206 static int menukey = 0;
212 int abortboot(int bootdelay)
216 #ifdef CONFIG_MENUPROMPT
217 printf(CONFIG_MENUPROMPT);
219 printf("Hit any key to stop autoboot: %2d ", bootdelay);
222 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
224 * Check if key already pressed
225 * Don't check if bootdelay < 0
227 if (bootdelay >= 0) {
228 if (tstc()) { /* we got a key press */
229 (void) getc(); /* consume input */
231 abort = 1; /* don't auto boot */
236 while ((bootdelay > 0) && (!abort)) {
240 /* delay 100 * 10ms */
241 for (i=0; !abort && i<100; ++i) {
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 */
255 printf("\b\b\b%2d ", bootdelay);
260 #ifdef CONFIG_SILENT_CONSOLE
262 gd->flags &= ~GD_FLG_SILENT;
267 # endif /* CONFIG_AUTOBOOT_KEYED */
268 #endif /* CONFIG_BOOTDELAY >= 0 */
271 * Return 0 on success, or != 0 on error.
273 #ifndef CONFIG_CMD_PXE
276 int run_command2(const char *cmd, int flag)
278 #ifndef CONFIG_SYS_HUSH_PARSER
280 * run_command can return 0 or 1 for success, so clean up its result.
282 if (run_command(cmd, flag) == -1)
287 return parse_string_outer(cmd,
288 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
292 /****************************************************************************/
294 void main_loop (void)
296 #ifndef CONFIG_SYS_HUSH_PARSER
297 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
303 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
307 #ifdef CONFIG_PREBOOT
310 #ifdef CONFIG_BOOTCOUNT_LIMIT
311 unsigned long bootcount = 0;
312 unsigned long bootlimit = 0;
315 #endif /* CONFIG_BOOTCOUNT_LIMIT */
317 #ifdef CONFIG_BOOTCOUNT_LIMIT
318 bootcount = bootcount_load();
320 bootcount_store (bootcount);
321 sprintf (bcs_set, "%lu", bootcount);
322 setenv ("bootcount", bcs_set);
323 bcs = getenv ("bootlimit");
324 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
325 #endif /* CONFIG_BOOTCOUNT_LIMIT */
327 #ifdef CONFIG_MODEM_SUPPORT
328 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init);
330 char *str = strdup(getenv("mdm_cmd"));
331 setenv ("preboot", str); /* set or delete definition */
334 mdm_init(); /* wait for modem connection */
336 #endif /* CONFIG_MODEM_SUPPORT */
338 #ifdef CONFIG_VERSION_VARIABLE
340 setenv ("ver", version_string); /* set version variable */
342 #endif /* CONFIG_VERSION_VARIABLE */
344 #ifdef CONFIG_SYS_HUSH_PARSER
345 u_boot_hush_start ();
348 #if defined(CONFIG_HUSH_INIT_VAR)
352 #ifdef CONFIG_PREBOOT
353 if ((p = getenv ("preboot")) != NULL) {
354 # ifdef CONFIG_AUTOBOOT_KEYED
355 int prev = disable_ctrlc(1); /* disable Control C checking */
360 # ifdef CONFIG_AUTOBOOT_KEYED
361 disable_ctrlc(prev); /* restore Control C checking */
364 #endif /* CONFIG_PREBOOT */
366 #if defined(CONFIG_UPDATE_TFTP)
368 #endif /* CONFIG_UPDATE_TFTP */
370 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
371 s = getenv ("bootdelay");
372 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
374 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
376 #if defined(CONFIG_MENU_SHOW)
377 bootdelay = menu_show(bootdelay);
379 # ifdef CONFIG_BOOT_RETRY_TIME
381 # endif /* CONFIG_BOOT_RETRY_TIME */
384 if (gd->flags & GD_FLG_POSTFAIL) {
385 s = getenv("failbootcmd");
388 #endif /* CONFIG_POST */
389 #ifdef CONFIG_BOOTCOUNT_LIMIT
390 if (bootlimit && (bootcount > bootlimit)) {
391 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
392 (unsigned)bootlimit);
393 s = getenv ("altbootcmd");
396 #endif /* CONFIG_BOOTCOUNT_LIMIT */
397 s = getenv ("bootcmd");
399 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
401 if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
402 # ifdef CONFIG_AUTOBOOT_KEYED
403 int prev = disable_ctrlc(1); /* disable Control C checking */
408 # ifdef CONFIG_AUTOBOOT_KEYED
409 disable_ctrlc(prev); /* restore Control C checking */
413 # ifdef CONFIG_MENUKEY
414 if (menukey == CONFIG_MENUKEY) {
415 s = getenv("menucmd");
419 #endif /* CONFIG_MENUKEY */
420 #endif /* CONFIG_BOOTDELAY */
423 * Main Loop for Monitor Command Processing
425 #ifdef CONFIG_SYS_HUSH_PARSER
427 /* This point is never reached */
431 #ifdef CONFIG_BOOT_RETRY_TIME
433 /* Saw enough of a valid command to
434 * restart the timeout.
439 len = readline (CONFIG_SYS_PROMPT);
441 flag = 0; /* assume no special flags for now */
443 strcpy (lastcommand, console_buffer);
445 flag |= CMD_FLAG_REPEAT;
446 #ifdef CONFIG_BOOT_RETRY_TIME
447 else if (len == -2) {
448 /* -2 means timed out, retry autoboot
450 puts ("\nTimed out waiting for command\n");
451 # ifdef CONFIG_RESET_TO_RETRY
452 /* Reinit board to run initialization code again */
453 do_reset (NULL, 0, 0, NULL);
455 return; /* retry autoboot */
461 puts ("<INTERRUPT>\n");
463 rc = run_command (lastcommand, flag);
466 /* invalid command or not repeatable, forget it */
470 #endif /*CONFIG_SYS_HUSH_PARSER*/
473 #ifdef CONFIG_BOOT_RETRY_TIME
474 /***************************************************************************
475 * initialize command line timeout
477 void init_cmd_timeout(void)
479 char *s = getenv ("bootretry");
482 retry_time = (int)simple_strtol(s, NULL, 10);
484 retry_time = CONFIG_BOOT_RETRY_TIME;
486 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
487 retry_time = CONFIG_BOOT_RETRY_MIN;
490 /***************************************************************************
491 * reset command line timeout to retry_time seconds
493 void reset_cmd_timeout(void)
495 endtime = endtick(retry_time);
499 #ifdef CONFIG_CMDLINE_EDITING
502 * cmdline-editing related codes from vivi.
503 * Author: Janghoon Lyu <nandy@mizi.com>
506 #define putnstr(str,n) do { \
507 printf ("%.*s", (int)n, str); \
510 #define CTL_CH(c) ((c) - 'a' + 1)
511 #define CTL_BACKSPACE ('\b')
512 #define DEL ((char)255)
513 #define DEL7 ((char)127)
514 #define CREAD_HIST_CHAR ('!')
516 #define getcmd_putch(ch) putc(ch)
517 #define getcmd_getch() getc()
518 #define getcmd_cbeep() getcmd_putch('\a')
521 #define HIST_SIZE CONFIG_SYS_CBSIZE
523 static int hist_max = 0;
524 static int hist_add_idx = 0;
525 static int hist_cur = -1;
526 unsigned hist_num = 0;
528 char* hist_list[HIST_MAX];
529 char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */
531 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
533 static void hist_init(void)
542 for (i = 0; i < HIST_MAX; i++) {
543 hist_list[i] = hist_lines[i];
544 hist_list[i][0] = '\0';
548 static void cread_add_to_hist(char *line)
550 strcpy(hist_list[hist_add_idx], line);
552 if (++hist_add_idx >= HIST_MAX)
555 if (hist_add_idx > hist_max)
556 hist_max = hist_add_idx;
561 static char* hist_prev(void)
573 if (hist_cur == hist_add_idx) {
577 ret = hist_list[hist_cur];
582 static char* hist_next(void)
589 if (hist_cur == hist_add_idx)
592 if (++hist_cur > hist_max)
595 if (hist_cur == hist_add_idx) {
598 ret = hist_list[hist_cur];
603 #ifndef CONFIG_CMDLINE_EDITING
604 static void cread_print_hist_list(void)
609 n = hist_num - hist_max;
611 i = hist_add_idx + 1;
615 if (i == hist_add_idx)
617 printf("%s\n", hist_list[i]);
622 #endif /* CONFIG_CMDLINE_EDITING */
624 #define BEGINNING_OF_LINE() { \
626 getcmd_putch(CTL_BACKSPACE); \
631 #define ERASE_TO_EOL() { \
632 if (num < eol_num) { \
633 printf("%*s", (int)(eol_num - num), ""); \
635 getcmd_putch(CTL_BACKSPACE); \
636 } while (--eol_num > num); \
640 #define REFRESH_TO_EOL() { \
641 if (num < eol_num) { \
642 wlen = eol_num - num; \
643 putnstr(buf + num, wlen); \
648 static void cread_add_char(char ichar, int insert, unsigned long *num,
649 unsigned long *eol_num, char *buf, unsigned long len)
654 if (insert || *num == *eol_num) {
655 if (*eol_num > len - 1) {
663 wlen = *eol_num - *num;
665 memmove(&buf[*num+1], &buf[*num], wlen-1);
669 putnstr(buf + *num, wlen);
672 getcmd_putch(CTL_BACKSPACE);
675 /* echo the character */
678 putnstr(buf + *num, wlen);
683 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
684 unsigned long *eol_num, char *buf, unsigned long len)
687 cread_add_char(*str, insert, num, eol_num, buf, len);
692 static int cread_line(const char *const prompt, char *buf, unsigned int *len,
695 unsigned long num = 0;
696 unsigned long eol_num = 0;
702 int init_len = strlen(buf);
706 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
709 #ifdef CONFIG_BOOT_RETRY_TIME
710 while (!tstc()) { /* while no incoming data */
711 if (retry_time >= 0 && get_ticks() > endtime)
712 return (-2); /* timed out */
716 if (first && timeout) {
717 uint64_t etime = endtick(timeout);
719 while (!tstc()) { /* while no incoming data */
720 if (get_ticks() >= etime)
721 return -2; /* timed out */
727 ichar = getcmd_getch();
729 if ((ichar == '\n') || (ichar == '\r')) {
735 * handle standard linux xterm esc sequences for arrow key, etc.
740 esc_save[esc_len] = ichar;
743 cread_add_str(esc_save, esc_len, insert,
744 &num, &eol_num, buf, *len);
752 case 'D': /* <- key */
756 case 'C': /* -> key */
759 break; /* pass off to ^F handler */
760 case 'H': /* Home key */
763 break; /* pass off to ^A handler */
764 case 'A': /* up arrow */
767 break; /* pass off to ^P handler */
768 case 'B': /* down arrow */
771 break; /* pass off to ^N handler */
773 esc_save[esc_len++] = ichar;
774 cread_add_str(esc_save, esc_len, insert,
775 &num, &eol_num, buf, *len);
784 esc_save[esc_len] = ichar;
787 puts("impossible condition #876\n");
795 case CTL_CH('c'): /* ^C - break */
796 *buf = '\0'; /* discard input */
800 getcmd_putch(buf[num]);
806 getcmd_putch(CTL_BACKSPACE);
812 wlen = eol_num - num - 1;
814 memmove(&buf[num], &buf[num+1], wlen);
815 putnstr(buf + num, wlen);
820 getcmd_putch(CTL_BACKSPACE);
843 wlen = eol_num - num;
845 memmove(&buf[num], &buf[num+1], wlen);
846 getcmd_putch(CTL_BACKSPACE);
847 putnstr(buf + num, wlen);
850 getcmd_putch(CTL_BACKSPACE);
862 if (ichar == CTL_CH('p'))
872 /* nuke the current line */
876 /* erase to end of line */
879 /* copy new line into place and display */
881 eol_num = strlen(buf);
885 #ifdef CONFIG_AUTO_COMPLETE
889 /* do not autocomplete when in the middle */
896 col = strlen(prompt) + eol_num;
898 if (cmd_auto_complete(prompt, buf, &num2, &col)) {
907 cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
912 buf[eol_num] = '\0'; /* lose the newline */
914 if (buf[0] && buf[0] != CREAD_HIST_CHAR)
915 cread_add_to_hist(buf);
916 hist_cur = hist_add_idx;
921 #endif /* CONFIG_CMDLINE_EDITING */
923 /****************************************************************************/
926 * Prompt for input and read a line.
927 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
928 * time out when time goes past endtime (timebase time in ticks).
929 * Return: number of read characters
933 int readline (const char *const prompt)
936 * If console_buffer isn't 0-length the user will be prompted to modify
937 * it instead of entering it from scratch as desired.
939 console_buffer[0] = '\0';
941 return readline_into_buffer(prompt, console_buffer, 0);
945 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
948 #ifdef CONFIG_CMDLINE_EDITING
949 unsigned int len = CONFIG_SYS_CBSIZE;
951 static int initted = 0;
954 * History uses a global array which is not
955 * writable until after relocation to RAM.
956 * Revert to non-history version if still
957 * running from flash.
959 if (gd->flags & GD_FLG_RELOC) {
968 rc = cread_line(prompt, p, &len, timeout);
969 return rc < 0 ? rc : len;
972 #endif /* CONFIG_CMDLINE_EDITING */
974 int n = 0; /* buffer index */
975 int plen = 0; /* prompt length */
976 int col; /* output column cnt */
981 plen = strlen (prompt);
987 #ifdef CONFIG_BOOT_RETRY_TIME
988 while (!tstc()) { /* while no incoming data */
989 if (retry_time >= 0 && get_ticks() > endtime)
990 return (-2); /* timed out */
994 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
996 #ifdef CONFIG_SHOW_ACTIVITY
998 extern void show_activity(int arg);
1006 * Special character handling
1009 case '\r': /* Enter */
1015 case '\0': /* nul */
1018 case 0x03: /* ^C - break */
1019 p_buf[0] = '\0'; /* discard input */
1022 case 0x15: /* ^U - erase line */
1023 while (col > plen) {
1031 case 0x17: /* ^W - erase word */
1032 p=delete_char(p_buf, p, &col, &n, plen);
1033 while ((n > 0) && (*p != ' ')) {
1034 p=delete_char(p_buf, p, &col, &n, plen);
1038 case 0x08: /* ^H - backspace */
1039 case 0x7F: /* DEL - backspace */
1040 p=delete_char(p_buf, p, &col, &n, plen);
1045 * Must be a normal character then
1047 if (n < CONFIG_SYS_CBSIZE-2) {
1048 if (c == '\t') { /* expand TABs */
1049 #ifdef CONFIG_AUTO_COMPLETE
1050 /* if auto completion triggered just continue */
1052 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1053 p = p_buf + n; /* reset */
1057 puts (tab_seq+(col&07));
1058 col += 8 - (col&07);
1060 ++col; /* echo input */
1065 } else { /* Buffer full */
1070 #ifdef CONFIG_CMDLINE_EDITING
1075 /****************************************************************************/
1077 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1085 if (*(--p) == '\t') { /* will retype the whole line */
1086 while (*colp > plen) {
1090 for (s=buffer; s<p; ++s) {
1092 puts (tab_seq+((*colp) & 07));
1093 *colp += 8 - ((*colp) & 07);
1107 /****************************************************************************/
1109 int parse_line (char *line, char *argv[])
1114 printf ("parse_line: \"%s\"\n", line);
1116 while (nargs < CONFIG_SYS_MAXARGS) {
1118 /* skip any white space */
1119 while (isblank(*line))
1122 if (*line == '\0') { /* end of line, no more args */
1125 printf ("parse_line: nargs=%d\n", nargs);
1130 argv[nargs++] = line; /* begin of argument string */
1132 /* find end of string */
1133 while (*line && !isblank(*line))
1136 if (*line == '\0') { /* end of line, no more args */
1139 printf ("parse_line: nargs=%d\n", nargs);
1144 *line++ = '\0'; /* terminate current arg */
1147 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1150 printf ("parse_line: nargs=%d\n", nargs);
1155 /****************************************************************************/
1157 static void process_macros (const char *input, char *output)
1160 const char *varname_start = NULL;
1161 int inputcnt = strlen (input);
1162 int outputcnt = CONFIG_SYS_CBSIZE;
1163 int state = 0; /* 0 = waiting for '$' */
1165 /* 1 = waiting for '(' or '{' */
1166 /* 2 = waiting for ')' or '}' */
1167 /* 3 = waiting for ''' */
1169 char *output_start = output;
1171 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1175 prev = '\0'; /* previous character */
1177 while (inputcnt && outputcnt) {
1182 /* remove one level of escape characters */
1183 if ((c == '\\') && (prev != '\\')) {
1184 if (inputcnt-- == 0)
1192 case 0: /* Waiting for (unescaped) $ */
1193 if ((c == '\'') && (prev != '\\')) {
1197 if ((c == '$') && (prev != '\\')) {
1204 case 1: /* Waiting for ( */
1205 if (c == '(' || c == '{') {
1207 varname_start = input;
1219 case 2: /* Waiting for ) */
1220 if (c == ')' || c == '}') {
1222 char envname[CONFIG_SYS_CBSIZE], *envval;
1223 int envcnt = input - varname_start - 1; /* Varname # of chars */
1225 /* Get the varname */
1226 for (i = 0; i < envcnt; i++) {
1227 envname[i] = varname_start[i];
1232 envval = getenv (envname);
1234 /* Copy into the line if it exists */
1236 while ((*envval) && outputcnt) {
1237 *(output++) = *(envval++);
1240 /* Look for another '$' */
1244 case 3: /* Waiting for ' */
1245 if ((c == '\'') && (prev != '\\')) {
1262 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1263 strlen (output_start), output_start);
1267 /****************************************************************************
1269 * 1 - command executed, repeatable
1270 * 0 - command executed but not repeatable, interrupted commands are
1271 * always considered not repeatable
1272 * -1 - not executed (unrecognized, bootd recursion or too many args)
1273 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1274 * considered unrecognized)
1278 * We must create a temporary copy of the command since the command we get
1279 * may be the result from getenv(), which returns a pointer directly to
1280 * the environment data, which may change magicly when the command we run
1281 * creates or modifies environment variables (like "bootp" does).
1284 int run_command (const char *cmd, int flag)
1287 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */
1288 char *token; /* start of token in cmdbuf */
1289 char *sep; /* end of token (separator) in cmdbuf */
1290 char finaltoken[CONFIG_SYS_CBSIZE];
1292 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
1298 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1299 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */
1303 clear_ctrlc(); /* forget any previous Control C */
1305 if (!cmd || !*cmd) {
1306 return -1; /* empty command */
1309 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1310 puts ("## Command too long!\n");
1314 strcpy (cmdbuf, cmd);
1316 /* Process separators and check for invalid
1317 * repeatable commands
1321 printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1326 * Find separator, or string end
1327 * Allow simple escape of ';' by writing "\;"
1329 for (inquotes = 0, sep = str; *sep; sep++) {
1335 (*sep == ';') && /* separator */
1336 ( sep != str) && /* past string start */
1337 (*(sep-1) != '\\')) /* and NOT escaped */
1342 * Limit the token to data between separators
1346 str = sep + 1; /* start of command for next pass */
1350 str = sep; /* no more commands for next pass */
1352 printf ("token: \"%s\"\n", token);
1355 /* find macros in this token and replace them */
1356 process_macros (token, finaltoken);
1358 /* Extract arguments */
1359 if ((argc = parse_line (finaltoken, argv)) == 0) {
1360 rc = -1; /* no command at all */
1364 /* Look up command in command table */
1365 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1366 printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1367 rc = -1; /* give up after bad command */
1371 /* found - check max args */
1372 if (argc > cmdtp->maxargs) {
1378 #if defined(CONFIG_CMD_BOOTD)
1379 /* avoid "bootd" recursion */
1380 if (cmdtp->cmd == do_bootd) {
1382 printf ("[%s]\n", finaltoken);
1384 if (flag & CMD_FLAG_BOOTD) {
1385 puts ("'bootd' recursion detected\n");
1389 flag |= CMD_FLAG_BOOTD;
1394 /* OK - call function to do the command */
1395 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1399 repeatable &= cmdtp->repeatable;
1401 /* Did the user stop this? */
1403 return -1; /* if stopped then not repeatable */
1406 return rc ? rc : repeatable;
1409 /****************************************************************************/
1411 #if defined(CONFIG_CMD_RUN)
1412 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1417 return cmd_usage(cmdtp);
1419 for (i=1; i<argc; ++i) {
1422 if ((arg = getenv (argv[i])) == NULL) {
1423 printf ("## Error: \"%s\" not defined\n", argv[i]);
1427 if (run_command2(arg, flag) != 0)