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,
33 #ifdef CONFIG_MODEM_SUPPORT
34 #include <malloc.h> /* for free() prototype */
37 #ifdef CONFIG_SYS_HUSH_PARSER
43 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
44 DECLARE_GLOBAL_DATA_PTR;
48 * Board-specific Platform code can reimplement show_boot_progress () if needed
50 void inline __show_boot_progress (int val) {}
51 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
53 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY)
54 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); /* for do_reset() prototype */
57 #if defined(CONFIG_UPDATE_TFTP)
58 void update_tftp (void);
59 #endif /* CONFIG_UPDATE_TFTP */
61 #define MAX_DELAY_STOP_STR 32
63 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
64 static int abortboot(int);
69 char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */
71 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
72 static char erase_seq[] = "\b \b"; /* erase sequence */
73 static char tab_seq[] = " "; /* used to expand TABs */
75 #ifdef CONFIG_BOOT_RETRY_TIME
76 static uint64_t endtime = 0; /* must be set, default is instant timeout */
77 static int retry_time = -1; /* -1 so can call readline before main_loop */
80 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
82 #ifndef CONFIG_BOOT_RETRY_MIN
83 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
86 #ifdef CONFIG_MODEM_SUPPORT
88 extern void mdm_init(void); /* defined in board.c */
91 /***************************************************************************
92 * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
93 * returns: 0 - no key string, allow autoboot
94 * 1 - got key string, abort
96 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
97 # if defined(CONFIG_AUTOBOOT_KEYED)
98 static __inline__ int abortboot(int bootdelay)
101 uint64_t etime = endtick(bootdelay);
108 { str: getenv ("bootdelaykey"), retry: 1 },
109 { str: getenv ("bootdelaykey2"), retry: 1 },
110 { str: getenv ("bootstopkey"), retry: 0 },
111 { str: getenv ("bootstopkey2"), retry: 0 },
114 char presskey [MAX_DELAY_STOP_STR];
115 u_int presskey_len = 0;
116 u_int presskey_max = 0;
119 # ifdef CONFIG_AUTOBOOT_PROMPT
120 printf(CONFIG_AUTOBOOT_PROMPT);
123 # ifdef CONFIG_AUTOBOOT_DELAY_STR
124 if (delaykey[0].str == NULL)
125 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
127 # ifdef CONFIG_AUTOBOOT_DELAY_STR2
128 if (delaykey[1].str == NULL)
129 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
131 # ifdef CONFIG_AUTOBOOT_STOP_STR
132 if (delaykey[2].str == NULL)
133 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
135 # ifdef CONFIG_AUTOBOOT_STOP_STR2
136 if (delaykey[3].str == NULL)
137 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
140 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
141 delaykey[i].len = delaykey[i].str == NULL ?
142 0 : strlen (delaykey[i].str);
143 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
144 MAX_DELAY_STOP_STR : delaykey[i].len;
146 presskey_max = presskey_max > delaykey[i].len ?
147 presskey_max : delaykey[i].len;
150 printf("%s key:<%s>\n",
151 delaykey[i].retry ? "delay" : "stop",
152 delaykey[i].str ? delaykey[i].str : "NULL");
156 /* In order to keep up with incoming data, check timeout only
161 if (presskey_len < presskey_max) {
162 presskey [presskey_len ++] = getc();
165 for (i = 0; i < presskey_max - 1; i ++)
166 presskey [i] = presskey [i + 1];
168 presskey [i] = getc();
172 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
173 if (delaykey[i].len > 0 &&
174 presskey_len >= delaykey[i].len &&
175 memcmp (presskey + presskey_len - delaykey[i].len,
177 delaykey[i].len) == 0) {
179 printf("got %skey\n",
180 delaykey[i].retry ? "delay" : "stop");
183 # ifdef CONFIG_BOOT_RETRY_TIME
184 /* don't retry auto boot */
185 if (! delaykey[i].retry)
191 } while (!abort && get_ticks() <= etime);
195 puts("key timeout\n");
198 #ifdef CONFIG_SILENT_CONSOLE
200 gd->flags &= ~GD_FLG_SILENT;
206 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */
208 #ifdef CONFIG_MENUKEY
209 static int menukey = 0;
212 static __inline__ 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 */
270 /****************************************************************************/
272 void main_loop (void)
274 #ifndef CONFIG_SYS_HUSH_PARSER
275 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
281 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
285 #ifdef CONFIG_PREBOOT
288 #ifdef CONFIG_BOOTCOUNT_LIMIT
289 unsigned long bootcount = 0;
290 unsigned long bootlimit = 0;
293 #endif /* CONFIG_BOOTCOUNT_LIMIT */
295 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
296 ulong bmp = 0; /* default bitmap */
297 extern int trab_vfd (ulong bitmap);
299 #ifdef CONFIG_MODEM_SUPPORT
301 bmp = 1; /* alternate bitmap */
304 #endif /* CONFIG_VFD && VFD_TEST_LOGO */
306 #ifdef CONFIG_BOOTCOUNT_LIMIT
307 bootcount = bootcount_load();
309 bootcount_store (bootcount);
310 sprintf (bcs_set, "%lu", bootcount);
311 setenv ("bootcount", bcs_set);
312 bcs = getenv ("bootlimit");
313 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
314 #endif /* CONFIG_BOOTCOUNT_LIMIT */
316 #ifdef CONFIG_MODEM_SUPPORT
317 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init);
319 char *str = strdup(getenv("mdm_cmd"));
320 setenv ("preboot", str); /* set or delete definition */
323 mdm_init(); /* wait for modem connection */
325 #endif /* CONFIG_MODEM_SUPPORT */
327 #ifdef CONFIG_VERSION_VARIABLE
329 extern char version_string[];
331 setenv ("ver", version_string); /* set version variable */
333 #endif /* CONFIG_VERSION_VARIABLE */
335 #ifdef CONFIG_SYS_HUSH_PARSER
336 u_boot_hush_start ();
339 #if defined(CONFIG_HUSH_INIT_VAR)
343 #ifdef CONFIG_AUTO_COMPLETE
344 install_auto_complete();
347 #ifdef CONFIG_PREBOOT
348 if ((p = getenv ("preboot")) != NULL) {
349 # ifdef CONFIG_AUTOBOOT_KEYED
350 int prev = disable_ctrlc(1); /* disable Control C checking */
353 # ifndef CONFIG_SYS_HUSH_PARSER
356 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
357 FLAG_EXIT_FROM_LOOP);
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 # ifdef CONFIG_BOOT_RETRY_TIME
378 # endif /* CONFIG_BOOT_RETRY_TIME */
381 if (gd->flags & GD_FLG_POSTFAIL) {
382 s = getenv("failbootcmd");
385 #endif /* CONFIG_POST */
386 #ifdef CONFIG_BOOTCOUNT_LIMIT
387 if (bootlimit && (bootcount > bootlimit)) {
388 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
389 (unsigned)bootlimit);
390 s = getenv ("altbootcmd");
393 #endif /* CONFIG_BOOTCOUNT_LIMIT */
394 s = getenv ("bootcmd");
396 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
398 if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
399 # ifdef CONFIG_AUTOBOOT_KEYED
400 int prev = disable_ctrlc(1); /* disable Control C checking */
403 # ifndef CONFIG_SYS_HUSH_PARSER
406 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
407 FLAG_EXIT_FROM_LOOP);
410 # ifdef CONFIG_AUTOBOOT_KEYED
411 disable_ctrlc(prev); /* restore Control C checking */
415 # ifdef CONFIG_MENUKEY
416 if (menukey == CONFIG_MENUKEY) {
417 s = getenv("menucmd");
419 # ifndef CONFIG_SYS_HUSH_PARSER
422 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
423 FLAG_EXIT_FROM_LOOP);
427 #endif /* CONFIG_MENUKEY */
428 #endif /* CONFIG_BOOTDELAY */
431 * Main Loop for Monitor Command Processing
433 #ifdef CONFIG_SYS_HUSH_PARSER
435 /* This point is never reached */
439 #ifdef CONFIG_BOOT_RETRY_TIME
441 /* Saw enough of a valid command to
442 * restart the timeout.
447 len = readline (CONFIG_SYS_PROMPT);
449 flag = 0; /* assume no special flags for now */
451 strcpy (lastcommand, console_buffer);
453 flag |= CMD_FLAG_REPEAT;
454 #ifdef CONFIG_BOOT_RETRY_TIME
455 else if (len == -2) {
456 /* -2 means timed out, retry autoboot
458 puts ("\nTimed out waiting for command\n");
459 # ifdef CONFIG_RESET_TO_RETRY
460 /* Reinit board to run initialization code again */
461 do_reset (NULL, 0, 0, NULL);
463 return; /* retry autoboot */
469 puts ("<INTERRUPT>\n");
471 rc = run_command (lastcommand, flag);
474 /* invalid command or not repeatable, forget it */
478 #endif /*CONFIG_SYS_HUSH_PARSER*/
481 #ifdef CONFIG_BOOT_RETRY_TIME
482 /***************************************************************************
483 * initialize command line timeout
485 void init_cmd_timeout(void)
487 char *s = getenv ("bootretry");
490 retry_time = (int)simple_strtol(s, NULL, 10);
492 retry_time = CONFIG_BOOT_RETRY_TIME;
494 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
495 retry_time = CONFIG_BOOT_RETRY_MIN;
498 /***************************************************************************
499 * reset command line timeout to retry_time seconds
501 void reset_cmd_timeout(void)
503 endtime = endtick(retry_time);
507 #ifdef CONFIG_CMDLINE_EDITING
510 * cmdline-editing related codes from vivi.
511 * Author: Janghoon Lyu <nandy@mizi.com>
514 #define putnstr(str,n) do { \
515 printf ("%.*s", (int)n, str); \
518 #define CTL_CH(c) ((c) - 'a' + 1)
519 #define CTL_BACKSPACE ('\b')
520 #define DEL ((char)255)
521 #define DEL7 ((char)127)
522 #define CREAD_HIST_CHAR ('!')
524 #define getcmd_putch(ch) putc(ch)
525 #define getcmd_getch() getc()
526 #define getcmd_cbeep() getcmd_putch('\a')
529 #define HIST_SIZE CONFIG_SYS_CBSIZE
531 static int hist_max = 0;
532 static int hist_add_idx = 0;
533 static int hist_cur = -1;
534 unsigned hist_num = 0;
536 char* hist_list[HIST_MAX];
537 char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */
539 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
541 static void hist_init(void)
550 for (i = 0; i < HIST_MAX; i++) {
551 hist_list[i] = hist_lines[i];
552 hist_list[i][0] = '\0';
556 static void cread_add_to_hist(char *line)
558 strcpy(hist_list[hist_add_idx], line);
560 if (++hist_add_idx >= HIST_MAX)
563 if (hist_add_idx > hist_max)
564 hist_max = hist_add_idx;
569 static char* hist_prev(void)
581 if (hist_cur == hist_add_idx) {
585 ret = hist_list[hist_cur];
590 static char* hist_next(void)
597 if (hist_cur == hist_add_idx)
600 if (++hist_cur > hist_max)
603 if (hist_cur == hist_add_idx) {
606 ret = hist_list[hist_cur];
611 #ifndef CONFIG_CMDLINE_EDITING
612 static void cread_print_hist_list(void)
617 n = hist_num - hist_max;
619 i = hist_add_idx + 1;
623 if (i == hist_add_idx)
625 printf("%s\n", hist_list[i]);
630 #endif /* CONFIG_CMDLINE_EDITING */
632 #define BEGINNING_OF_LINE() { \
634 getcmd_putch(CTL_BACKSPACE); \
639 #define ERASE_TO_EOL() { \
640 if (num < eol_num) { \
641 printf("%*s", (int)(eol_num - num), ""); \
643 getcmd_putch(CTL_BACKSPACE); \
644 } while (--eol_num > num); \
648 #define REFRESH_TO_EOL() { \
649 if (num < eol_num) { \
650 wlen = eol_num - num; \
651 putnstr(buf + num, wlen); \
656 static void cread_add_char(char ichar, int insert, unsigned long *num,
657 unsigned long *eol_num, char *buf, unsigned long len)
662 if (insert || *num == *eol_num) {
663 if (*eol_num > len - 1) {
671 wlen = *eol_num - *num;
673 memmove(&buf[*num+1], &buf[*num], wlen-1);
677 putnstr(buf + *num, wlen);
680 getcmd_putch(CTL_BACKSPACE);
683 /* echo the character */
686 putnstr(buf + *num, wlen);
691 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
692 unsigned long *eol_num, char *buf, unsigned long len)
695 cread_add_char(*str, insert, num, eol_num, buf, len);
700 static int cread_line(const char *const prompt, char *buf, unsigned int *len)
702 unsigned long num = 0;
703 unsigned long eol_num = 0;
709 int init_len = strlen(buf);
712 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
715 #ifdef CONFIG_BOOT_RETRY_TIME
716 while (!tstc()) { /* while no incoming data */
717 if (retry_time >= 0 && get_ticks() > endtime)
718 return (-2); /* timed out */
723 ichar = getcmd_getch();
725 if ((ichar == '\n') || (ichar == '\r')) {
731 * handle standard linux xterm esc sequences for arrow key, etc.
736 esc_save[esc_len] = ichar;
739 cread_add_str(esc_save, esc_len, insert,
740 &num, &eol_num, buf, *len);
748 case 'D': /* <- key */
752 case 'C': /* -> key */
755 break; /* pass off to ^F handler */
756 case 'H': /* Home key */
759 break; /* pass off to ^A handler */
760 case 'A': /* up arrow */
763 break; /* pass off to ^P handler */
764 case 'B': /* down arrow */
767 break; /* pass off to ^N handler */
769 esc_save[esc_len++] = ichar;
770 cread_add_str(esc_save, esc_len, insert,
771 &num, &eol_num, buf, *len);
780 esc_save[esc_len] = ichar;
783 puts("impossible condition #876\n");
791 case CTL_CH('c'): /* ^C - break */
792 *buf = '\0'; /* discard input */
796 getcmd_putch(buf[num]);
802 getcmd_putch(CTL_BACKSPACE);
808 wlen = eol_num - num - 1;
810 memmove(&buf[num], &buf[num+1], wlen);
811 putnstr(buf + num, wlen);
816 getcmd_putch(CTL_BACKSPACE);
839 wlen = eol_num - num;
841 memmove(&buf[num], &buf[num+1], wlen);
842 getcmd_putch(CTL_BACKSPACE);
843 putnstr(buf + num, wlen);
846 getcmd_putch(CTL_BACKSPACE);
858 if (ichar == CTL_CH('p'))
868 /* nuke the current line */
872 /* erase to end of line */
875 /* copy new line into place and display */
877 eol_num = strlen(buf);
881 #ifdef CONFIG_AUTO_COMPLETE
885 /* do not autocomplete when in the middle */
892 col = strlen(prompt) + eol_num;
894 if (cmd_auto_complete(prompt, buf, &num2, &col)) {
903 cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
908 buf[eol_num] = '\0'; /* lose the newline */
910 if (buf[0] && buf[0] != CREAD_HIST_CHAR)
911 cread_add_to_hist(buf);
912 hist_cur = hist_add_idx;
917 #endif /* CONFIG_CMDLINE_EDITING */
919 /****************************************************************************/
922 * Prompt for input and read a line.
923 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
924 * time out when time goes past endtime (timebase time in ticks).
925 * Return: number of read characters
929 int readline (const char *const prompt)
932 * If console_buffer isn't 0-length the user will be prompted to modify
933 * it instead of entering it from scratch as desired.
935 console_buffer[0] = '\0';
937 return readline_into_buffer(prompt, console_buffer);
941 int readline_into_buffer (const char *const prompt, char * buffer)
944 #ifdef CONFIG_CMDLINE_EDITING
945 unsigned int len = CONFIG_SYS_CBSIZE;
947 static int initted = 0;
950 * History uses a global array which is not
951 * writable until after relocation to RAM.
952 * Revert to non-history version if still
953 * running from flash.
955 if (gd->flags & GD_FLG_RELOC) {
964 rc = cread_line(prompt, p, &len);
965 return rc < 0 ? rc : len;
968 #endif /* CONFIG_CMDLINE_EDITING */
970 int n = 0; /* buffer index */
971 int plen = 0; /* prompt length */
972 int col; /* output column cnt */
977 plen = strlen (prompt);
983 #ifdef CONFIG_BOOT_RETRY_TIME
984 while (!tstc()) { /* while no incoming data */
985 if (retry_time >= 0 && get_ticks() > endtime)
986 return (-2); /* timed out */
990 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
992 #ifdef CONFIG_SHOW_ACTIVITY
994 extern void show_activity(int arg);
1002 * Special character handling
1005 case '\r': /* Enter */
1011 case '\0': /* nul */
1014 case 0x03: /* ^C - break */
1015 p_buf[0] = '\0'; /* discard input */
1018 case 0x15: /* ^U - erase line */
1019 while (col > plen) {
1027 case 0x17: /* ^W - erase word */
1028 p=delete_char(p_buf, p, &col, &n, plen);
1029 while ((n > 0) && (*p != ' ')) {
1030 p=delete_char(p_buf, p, &col, &n, plen);
1034 case 0x08: /* ^H - backspace */
1035 case 0x7F: /* DEL - backspace */
1036 p=delete_char(p_buf, p, &col, &n, plen);
1041 * Must be a normal character then
1043 if (n < CONFIG_SYS_CBSIZE-2) {
1044 if (c == '\t') { /* expand TABs */
1045 #ifdef CONFIG_AUTO_COMPLETE
1046 /* if auto completion triggered just continue */
1048 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1049 p = p_buf + n; /* reset */
1053 puts (tab_seq+(col&07));
1054 col += 8 - (col&07);
1056 ++col; /* echo input */
1061 } else { /* Buffer full */
1066 #ifdef CONFIG_CMDLINE_EDITING
1071 /****************************************************************************/
1073 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1081 if (*(--p) == '\t') { /* will retype the whole line */
1082 while (*colp > plen) {
1086 for (s=buffer; s<p; ++s) {
1088 puts (tab_seq+((*colp) & 07));
1089 *colp += 8 - ((*colp) & 07);
1103 /****************************************************************************/
1105 int parse_line (char *line, char *argv[])
1110 printf ("parse_line: \"%s\"\n", line);
1112 while (nargs < CONFIG_SYS_MAXARGS) {
1114 /* skip any white space */
1115 while ((*line == ' ') || (*line == '\t')) {
1119 if (*line == '\0') { /* end of line, no more args */
1122 printf ("parse_line: nargs=%d\n", nargs);
1127 argv[nargs++] = line; /* begin of argument string */
1129 /* find end of string */
1130 while (*line && (*line != ' ') && (*line != '\t')) {
1134 if (*line == '\0') { /* end of line, no more args */
1137 printf ("parse_line: nargs=%d\n", nargs);
1142 *line++ = '\0'; /* terminate current arg */
1145 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1148 printf ("parse_line: nargs=%d\n", nargs);
1153 /****************************************************************************/
1155 static void process_macros (const char *input, char *output)
1158 const char *varname_start = NULL;
1159 int inputcnt = strlen (input);
1160 int outputcnt = CONFIG_SYS_CBSIZE;
1161 int state = 0; /* 0 = waiting for '$' */
1163 /* 1 = waiting for '(' or '{' */
1164 /* 2 = waiting for ')' or '}' */
1165 /* 3 = waiting for ''' */
1167 char *output_start = output;
1169 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1173 prev = '\0'; /* previous character */
1175 while (inputcnt && outputcnt) {
1180 /* remove one level of escape characters */
1181 if ((c == '\\') && (prev != '\\')) {
1182 if (inputcnt-- == 0)
1190 case 0: /* Waiting for (unescaped) $ */
1191 if ((c == '\'') && (prev != '\\')) {
1195 if ((c == '$') && (prev != '\\')) {
1202 case 1: /* Waiting for ( */
1203 if (c == '(' || c == '{') {
1205 varname_start = input;
1217 case 2: /* Waiting for ) */
1218 if (c == ')' || c == '}') {
1220 char envname[CONFIG_SYS_CBSIZE], *envval;
1221 int envcnt = input - varname_start - 1; /* Varname # of chars */
1223 /* Get the varname */
1224 for (i = 0; i < envcnt; i++) {
1225 envname[i] = varname_start[i];
1230 envval = getenv (envname);
1232 /* Copy into the line if it exists */
1234 while ((*envval) && outputcnt) {
1235 *(output++) = *(envval++);
1238 /* Look for another '$' */
1242 case 3: /* Waiting for ' */
1243 if ((c == '\'') && (prev != '\\')) {
1260 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1261 strlen (output_start), output_start);
1265 /****************************************************************************
1267 * 1 - command executed, repeatable
1268 * 0 - command executed but not repeatable, interrupted commands are
1269 * always considered not repeatable
1270 * -1 - not executed (unrecognized, bootd recursion or too many args)
1271 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1272 * considered unrecognized)
1276 * We must create a temporary copy of the command since the command we get
1277 * may be the result from getenv(), which returns a pointer directly to
1278 * the environment data, which may change magicly when the command we run
1279 * creates or modifies environment variables (like "bootp" does).
1282 int run_command (const char *cmd, int flag)
1285 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */
1286 char *token; /* start of token in cmdbuf */
1287 char *sep; /* end of token (separator) in cmdbuf */
1288 char finaltoken[CONFIG_SYS_CBSIZE];
1290 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
1296 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1297 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */
1301 clear_ctrlc(); /* forget any previous Control C */
1303 if (!cmd || !*cmd) {
1304 return -1; /* empty command */
1307 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1308 puts ("## Command too long!\n");
1312 strcpy (cmdbuf, cmd);
1314 /* Process separators and check for invalid
1315 * repeatable commands
1319 printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1324 * Find separator, or string end
1325 * Allow simple escape of ';' by writing "\;"
1327 for (inquotes = 0, sep = str; *sep; sep++) {
1333 (*sep == ';') && /* separator */
1334 ( sep != str) && /* past string start */
1335 (*(sep-1) != '\\')) /* and NOT escaped */
1340 * Limit the token to data between separators
1344 str = sep + 1; /* start of command for next pass */
1348 str = sep; /* no more commands for next pass */
1350 printf ("token: \"%s\"\n", token);
1353 /* find macros in this token and replace them */
1354 process_macros (token, finaltoken);
1356 /* Extract arguments */
1357 if ((argc = parse_line (finaltoken, argv)) == 0) {
1358 rc = -1; /* no command at all */
1362 /* Look up command in command table */
1363 if ((cmdtp = find_cmd(argv[0])) == NULL) {
1364 printf ("Unknown command '%s' - try 'help'\n", argv[0]);
1365 rc = -1; /* give up after bad command */
1369 /* found - check max args */
1370 if (argc > cmdtp->maxargs) {
1376 #if defined(CONFIG_CMD_BOOTD)
1377 /* avoid "bootd" recursion */
1378 if (cmdtp->cmd == do_bootd) {
1380 printf ("[%s]\n", finaltoken);
1382 if (flag & CMD_FLAG_BOOTD) {
1383 puts ("'bootd' recursion detected\n");
1387 flag |= CMD_FLAG_BOOTD;
1392 /* OK - call function to do the command */
1393 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
1397 repeatable &= cmdtp->repeatable;
1399 /* Did the user stop this? */
1401 return -1; /* if stopped then not repeatable */
1404 return rc ? rc : repeatable;
1407 /****************************************************************************/
1409 #if defined(CONFIG_CMD_RUN)
1410 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1415 return cmd_usage(cmdtp);
1417 for (i=1; i<argc; ++i) {
1420 if ((arg = getenv (argv[i])) == NULL) {
1421 printf ("## Error: \"%s\" not defined\n", argv[i]);
1424 #ifndef CONFIG_SYS_HUSH_PARSER
1425 if (run_command (arg, flag) == -1)
1428 if (parse_string_outer(arg,
1429 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)