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,
35 #ifdef CONFIG_MODEM_SUPPORT
36 #include <malloc.h> /* for free() prototype */
39 #ifdef CONFIG_SYS_HUSH_PARSER
44 #include <linux/ctype.h>
47 #if defined(CONFIG_SILENT_CONSOLE) || defined(CONFIG_POST) || defined(CONFIG_CMDLINE_EDITING)
48 DECLARE_GLOBAL_DATA_PTR;
52 * Board-specific Platform code can reimplement show_boot_progress () if needed
54 void inline __show_boot_progress (int val) {}
55 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
57 #if defined(CONFIG_UPDATE_TFTP)
58 int update_tftp (ulong addr);
59 #endif /* CONFIG_UPDATE_TFTP */
61 #define MAX_DELAY_STOP_STR 32
65 char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */
67 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
68 static const char erase_seq[] = "\b \b"; /* erase sequence */
69 static const char tab_seq[] = " "; /* used to expand TABs */
71 #ifdef CONFIG_BOOT_RETRY_TIME
72 static uint64_t endtime = 0; /* must be set, default is instant timeout */
73 static int retry_time = -1; /* -1 so can call readline before main_loop */
76 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
78 #ifndef CONFIG_BOOT_RETRY_MIN
79 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
82 #ifdef CONFIG_MODEM_SUPPORT
84 extern void mdm_init(void); /* defined in board.c */
87 /***************************************************************************
88 * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
89 * returns: 0 - no key string, allow autoboot 1 - got key string, abort
91 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
92 # if defined(CONFIG_AUTOBOOT_KEYED)
96 int abortboot(int bootdelay)
99 uint64_t etime = endtick(bootdelay);
106 { str: getenv ("bootdelaykey"), retry: 1 },
107 { str: getenv ("bootdelaykey2"), retry: 1 },
108 { str: getenv ("bootstopkey"), retry: 0 },
109 { str: getenv ("bootstopkey2"), retry: 0 },
112 char presskey [MAX_DELAY_STOP_STR];
113 u_int presskey_len = 0;
114 u_int presskey_max = 0;
117 # ifdef CONFIG_AUTOBOOT_PROMPT
118 printf(CONFIG_AUTOBOOT_PROMPT);
121 # ifdef CONFIG_AUTOBOOT_DELAY_STR
122 if (delaykey[0].str == NULL)
123 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
125 # ifdef CONFIG_AUTOBOOT_DELAY_STR2
126 if (delaykey[1].str == NULL)
127 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
129 # ifdef CONFIG_AUTOBOOT_STOP_STR
130 if (delaykey[2].str == NULL)
131 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
133 # ifdef CONFIG_AUTOBOOT_STOP_STR2
134 if (delaykey[3].str == NULL)
135 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
138 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
139 delaykey[i].len = delaykey[i].str == NULL ?
140 0 : strlen (delaykey[i].str);
141 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
142 MAX_DELAY_STOP_STR : delaykey[i].len;
144 presskey_max = presskey_max > delaykey[i].len ?
145 presskey_max : delaykey[i].len;
148 printf("%s key:<%s>\n",
149 delaykey[i].retry ? "delay" : "stop",
150 delaykey[i].str ? delaykey[i].str : "NULL");
154 /* In order to keep up with incoming data, check timeout only
159 if (presskey_len < presskey_max) {
160 presskey [presskey_len ++] = getc();
163 for (i = 0; i < presskey_max - 1; i ++)
164 presskey [i] = presskey [i + 1];
166 presskey [i] = getc();
170 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
171 if (delaykey[i].len > 0 &&
172 presskey_len >= delaykey[i].len &&
173 memcmp (presskey + presskey_len - delaykey[i].len,
175 delaykey[i].len) == 0) {
177 printf("got %skey\n",
178 delaykey[i].retry ? "delay" : "stop");
181 # ifdef CONFIG_BOOT_RETRY_TIME
182 /* don't retry auto boot */
183 if (! delaykey[i].retry)
189 } while (!abort && get_ticks() <= etime);
193 puts("key timeout\n");
196 #ifdef CONFIG_SILENT_CONSOLE
198 gd->flags &= ~GD_FLG_SILENT;
204 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */
206 #ifdef CONFIG_MENUKEY
207 static int menukey = 0;
213 int abortboot(int bootdelay)
217 #ifdef CONFIG_MENUPROMPT
218 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)) {
241 /* delay 100 * 10ms */
242 for (i=0; !abort && i<100; ++i) {
243 if (tstc()) { /* we got a key press */
244 abort = 1; /* don't auto boot */
245 bootdelay = 0; /* no more delay */
246 # ifdef CONFIG_MENUKEY
249 (void) getc(); /* consume input */
256 printf("\b\b\b%2d ", bootdelay);
261 #ifdef CONFIG_SILENT_CONSOLE
263 gd->flags &= ~GD_FLG_SILENT;
268 # endif /* CONFIG_AUTOBOOT_KEYED */
269 #endif /* CONFIG_BOOTDELAY >= 0 */
271 /****************************************************************************/
273 void main_loop (void)
275 #ifndef CONFIG_SYS_HUSH_PARSER
276 static char lastcommand[CONFIG_SYS_CBSIZE] = { 0, };
282 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
286 #ifdef CONFIG_PREBOOT
289 #ifdef CONFIG_BOOTCOUNT_LIMIT
290 unsigned long bootcount = 0;
291 unsigned long bootlimit = 0;
294 #endif /* CONFIG_BOOTCOUNT_LIMIT */
296 #ifdef CONFIG_BOOTCOUNT_LIMIT
297 bootcount = bootcount_load();
299 bootcount_store (bootcount);
300 sprintf (bcs_set, "%lu", bootcount);
301 setenv ("bootcount", bcs_set);
302 bcs = getenv ("bootlimit");
303 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
304 #endif /* CONFIG_BOOTCOUNT_LIMIT */
306 #ifdef CONFIG_MODEM_SUPPORT
307 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init);
309 char *str = strdup(getenv("mdm_cmd"));
310 setenv ("preboot", str); /* set or delete definition */
313 mdm_init(); /* wait for modem connection */
315 #endif /* CONFIG_MODEM_SUPPORT */
317 #ifdef CONFIG_VERSION_VARIABLE
319 setenv ("ver", version_string); /* set version variable */
321 #endif /* CONFIG_VERSION_VARIABLE */
323 #ifdef CONFIG_SYS_HUSH_PARSER
324 u_boot_hush_start ();
327 #if defined(CONFIG_HUSH_INIT_VAR)
331 #ifdef CONFIG_PREBOOT
332 if ((p = getenv ("preboot")) != NULL) {
333 # ifdef CONFIG_AUTOBOOT_KEYED
334 int prev = disable_ctrlc(1); /* disable Control C checking */
337 run_command_list(p, -1, 0);
339 # ifdef CONFIG_AUTOBOOT_KEYED
340 disable_ctrlc(prev); /* restore Control C checking */
343 #endif /* CONFIG_PREBOOT */
345 #if defined(CONFIG_UPDATE_TFTP)
347 #endif /* CONFIG_UPDATE_TFTP */
349 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
350 s = getenv ("bootdelay");
351 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
353 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
355 #if defined(CONFIG_MENU_SHOW)
356 bootdelay = menu_show(bootdelay);
358 # ifdef CONFIG_BOOT_RETRY_TIME
360 # endif /* CONFIG_BOOT_RETRY_TIME */
363 if (gd->flags & GD_FLG_POSTFAIL) {
364 s = getenv("failbootcmd");
367 #endif /* CONFIG_POST */
368 #ifdef CONFIG_BOOTCOUNT_LIMIT
369 if (bootlimit && (bootcount > bootlimit)) {
370 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
371 (unsigned)bootlimit);
372 s = getenv ("altbootcmd");
375 #endif /* CONFIG_BOOTCOUNT_LIMIT */
376 s = getenv ("bootcmd");
378 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
380 if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
381 # ifdef CONFIG_AUTOBOOT_KEYED
382 int prev = disable_ctrlc(1); /* disable Control C checking */
385 run_command_list(s, -1, 0);
387 # ifdef CONFIG_AUTOBOOT_KEYED
388 disable_ctrlc(prev); /* restore Control C checking */
392 # ifdef CONFIG_MENUKEY
393 if (menukey == CONFIG_MENUKEY) {
394 s = getenv("menucmd");
396 run_command_list(s, -1, 0);
398 #endif /* CONFIG_MENUKEY */
399 #endif /* CONFIG_BOOTDELAY */
402 * Main Loop for Monitor Command Processing
404 #ifdef CONFIG_SYS_HUSH_PARSER
406 /* This point is never reached */
410 #ifdef CONFIG_BOOT_RETRY_TIME
412 /* Saw enough of a valid command to
413 * restart the timeout.
418 len = readline (CONFIG_SYS_PROMPT);
420 flag = 0; /* assume no special flags for now */
422 strcpy (lastcommand, console_buffer);
424 flag |= CMD_FLAG_REPEAT;
425 #ifdef CONFIG_BOOT_RETRY_TIME
426 else if (len == -2) {
427 /* -2 means timed out, retry autoboot
429 puts ("\nTimed out waiting for command\n");
430 # ifdef CONFIG_RESET_TO_RETRY
431 /* Reinit board to run initialization code again */
432 do_reset (NULL, 0, 0, NULL);
434 return; /* retry autoboot */
440 puts ("<INTERRUPT>\n");
442 rc = run_command(lastcommand, flag);
445 /* invalid command or not repeatable, forget it */
449 #endif /*CONFIG_SYS_HUSH_PARSER*/
452 #ifdef CONFIG_BOOT_RETRY_TIME
453 /***************************************************************************
454 * initialize command line timeout
456 void init_cmd_timeout(void)
458 char *s = getenv ("bootretry");
461 retry_time = (int)simple_strtol(s, NULL, 10);
463 retry_time = CONFIG_BOOT_RETRY_TIME;
465 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
466 retry_time = CONFIG_BOOT_RETRY_MIN;
469 /***************************************************************************
470 * reset command line timeout to retry_time seconds
472 void reset_cmd_timeout(void)
474 endtime = endtick(retry_time);
478 #ifdef CONFIG_CMDLINE_EDITING
481 * cmdline-editing related codes from vivi.
482 * Author: Janghoon Lyu <nandy@mizi.com>
485 #define putnstr(str,n) do { \
486 printf ("%.*s", (int)n, str); \
489 #define CTL_CH(c) ((c) - 'a' + 1)
490 #define CTL_BACKSPACE ('\b')
491 #define DEL ((char)255)
492 #define DEL7 ((char)127)
493 #define CREAD_HIST_CHAR ('!')
495 #define getcmd_putch(ch) putc(ch)
496 #define getcmd_getch() getc()
497 #define getcmd_cbeep() getcmd_putch('\a')
500 #define HIST_SIZE CONFIG_SYS_CBSIZE
502 static int hist_max = 0;
503 static int hist_add_idx = 0;
504 static int hist_cur = -1;
505 unsigned hist_num = 0;
507 char* hist_list[HIST_MAX];
508 char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */
510 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
512 static void hist_init(void)
521 for (i = 0; i < HIST_MAX; i++) {
522 hist_list[i] = hist_lines[i];
523 hist_list[i][0] = '\0';
527 static void cread_add_to_hist(char *line)
529 strcpy(hist_list[hist_add_idx], line);
531 if (++hist_add_idx >= HIST_MAX)
534 if (hist_add_idx > hist_max)
535 hist_max = hist_add_idx;
540 static char* hist_prev(void)
552 if (hist_cur == hist_add_idx) {
556 ret = hist_list[hist_cur];
561 static char* hist_next(void)
568 if (hist_cur == hist_add_idx)
571 if (++hist_cur > hist_max)
574 if (hist_cur == hist_add_idx) {
577 ret = hist_list[hist_cur];
582 #ifndef CONFIG_CMDLINE_EDITING
583 static void cread_print_hist_list(void)
588 n = hist_num - hist_max;
590 i = hist_add_idx + 1;
594 if (i == hist_add_idx)
596 printf("%s\n", hist_list[i]);
601 #endif /* CONFIG_CMDLINE_EDITING */
603 #define BEGINNING_OF_LINE() { \
605 getcmd_putch(CTL_BACKSPACE); \
610 #define ERASE_TO_EOL() { \
611 if (num < eol_num) { \
612 printf("%*s", (int)(eol_num - num), ""); \
614 getcmd_putch(CTL_BACKSPACE); \
615 } while (--eol_num > num); \
619 #define REFRESH_TO_EOL() { \
620 if (num < eol_num) { \
621 wlen = eol_num - num; \
622 putnstr(buf + num, wlen); \
627 static void cread_add_char(char ichar, int insert, unsigned long *num,
628 unsigned long *eol_num, char *buf, unsigned long len)
633 if (insert || *num == *eol_num) {
634 if (*eol_num > len - 1) {
642 wlen = *eol_num - *num;
644 memmove(&buf[*num+1], &buf[*num], wlen-1);
648 putnstr(buf + *num, wlen);
651 getcmd_putch(CTL_BACKSPACE);
654 /* echo the character */
657 putnstr(buf + *num, wlen);
662 static void cread_add_str(char *str, int strsize, int insert, unsigned long *num,
663 unsigned long *eol_num, char *buf, unsigned long len)
666 cread_add_char(*str, insert, num, eol_num, buf, len);
671 static int cread_line(const char *const prompt, char *buf, unsigned int *len,
674 unsigned long num = 0;
675 unsigned long eol_num = 0;
681 int init_len = strlen(buf);
685 cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len);
688 #ifdef CONFIG_BOOT_RETRY_TIME
689 while (!tstc()) { /* while no incoming data */
690 if (retry_time >= 0 && get_ticks() > endtime)
691 return (-2); /* timed out */
695 if (first && timeout) {
696 uint64_t etime = endtick(timeout);
698 while (!tstc()) { /* while no incoming data */
699 if (get_ticks() >= etime)
700 return -2; /* timed out */
706 ichar = getcmd_getch();
708 if ((ichar == '\n') || (ichar == '\r')) {
714 * handle standard linux xterm esc sequences for arrow key, etc.
719 esc_save[esc_len] = ichar;
722 cread_add_str(esc_save, esc_len, insert,
723 &num, &eol_num, buf, *len);
731 case 'D': /* <- key */
735 case 'C': /* -> key */
738 break; /* pass off to ^F handler */
739 case 'H': /* Home key */
742 break; /* pass off to ^A handler */
743 case 'A': /* up arrow */
746 break; /* pass off to ^P handler */
747 case 'B': /* down arrow */
750 break; /* pass off to ^N handler */
752 esc_save[esc_len++] = ichar;
753 cread_add_str(esc_save, esc_len, insert,
754 &num, &eol_num, buf, *len);
763 esc_save[esc_len] = ichar;
766 puts("impossible condition #876\n");
774 case CTL_CH('c'): /* ^C - break */
775 *buf = '\0'; /* discard input */
779 getcmd_putch(buf[num]);
785 getcmd_putch(CTL_BACKSPACE);
791 wlen = eol_num - num - 1;
793 memmove(&buf[num], &buf[num+1], wlen);
794 putnstr(buf + num, wlen);
799 getcmd_putch(CTL_BACKSPACE);
822 wlen = eol_num - num;
824 memmove(&buf[num], &buf[num+1], wlen);
825 getcmd_putch(CTL_BACKSPACE);
826 putnstr(buf + num, wlen);
829 getcmd_putch(CTL_BACKSPACE);
841 if (ichar == CTL_CH('p'))
851 /* nuke the current line */
855 /* erase to end of line */
858 /* copy new line into place and display */
860 eol_num = strlen(buf);
864 #ifdef CONFIG_AUTO_COMPLETE
868 /* do not autocomplete when in the middle */
875 col = strlen(prompt) + eol_num;
877 if (cmd_auto_complete(prompt, buf, &num2, &col)) {
886 cread_add_char(ichar, insert, &num, &eol_num, buf, *len);
891 buf[eol_num] = '\0'; /* lose the newline */
893 if (buf[0] && buf[0] != CREAD_HIST_CHAR)
894 cread_add_to_hist(buf);
895 hist_cur = hist_add_idx;
900 #endif /* CONFIG_CMDLINE_EDITING */
902 /****************************************************************************/
905 * Prompt for input and read a line.
906 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
907 * time out when time goes past endtime (timebase time in ticks).
908 * Return: number of read characters
912 int readline (const char *const prompt)
915 * If console_buffer isn't 0-length the user will be prompted to modify
916 * it instead of entering it from scratch as desired.
918 console_buffer[0] = '\0';
920 return readline_into_buffer(prompt, console_buffer, 0);
924 int readline_into_buffer(const char *const prompt, char *buffer, int timeout)
927 #ifdef CONFIG_CMDLINE_EDITING
928 unsigned int len = CONFIG_SYS_CBSIZE;
930 static int initted = 0;
933 * History uses a global array which is not
934 * writable until after relocation to RAM.
935 * Revert to non-history version if still
936 * running from flash.
938 if (gd->flags & GD_FLG_RELOC) {
947 rc = cread_line(prompt, p, &len, timeout);
948 return rc < 0 ? rc : len;
951 #endif /* CONFIG_CMDLINE_EDITING */
953 int n = 0; /* buffer index */
954 int plen = 0; /* prompt length */
955 int col; /* output column cnt */
960 plen = strlen (prompt);
966 #ifdef CONFIG_BOOT_RETRY_TIME
967 while (!tstc()) { /* while no incoming data */
968 if (retry_time >= 0 && get_ticks() > endtime)
969 return (-2); /* timed out */
973 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
975 #ifdef CONFIG_SHOW_ACTIVITY
984 * Special character handling
987 case '\r': /* Enter */
996 case 0x03: /* ^C - break */
997 p_buf[0] = '\0'; /* discard input */
1000 case 0x15: /* ^U - erase line */
1001 while (col > plen) {
1009 case 0x17: /* ^W - erase word */
1010 p=delete_char(p_buf, p, &col, &n, plen);
1011 while ((n > 0) && (*p != ' ')) {
1012 p=delete_char(p_buf, p, &col, &n, plen);
1016 case 0x08: /* ^H - backspace */
1017 case 0x7F: /* DEL - backspace */
1018 p=delete_char(p_buf, p, &col, &n, plen);
1023 * Must be a normal character then
1025 if (n < CONFIG_SYS_CBSIZE-2) {
1026 if (c == '\t') { /* expand TABs */
1027 #ifdef CONFIG_AUTO_COMPLETE
1028 /* if auto completion triggered just continue */
1030 if (cmd_auto_complete(prompt, console_buffer, &n, &col)) {
1031 p = p_buf + n; /* reset */
1035 puts (tab_seq+(col&07));
1036 col += 8 - (col&07);
1038 ++col; /* echo input */
1043 } else { /* Buffer full */
1048 #ifdef CONFIG_CMDLINE_EDITING
1053 /****************************************************************************/
1055 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
1063 if (*(--p) == '\t') { /* will retype the whole line */
1064 while (*colp > plen) {
1068 for (s=buffer; s<p; ++s) {
1070 puts (tab_seq+((*colp) & 07));
1071 *colp += 8 - ((*colp) & 07);
1085 /****************************************************************************/
1087 int parse_line (char *line, char *argv[])
1092 printf ("parse_line: \"%s\"\n", line);
1094 while (nargs < CONFIG_SYS_MAXARGS) {
1096 /* skip any white space */
1097 while (isblank(*line))
1100 if (*line == '\0') { /* end of line, no more args */
1103 printf ("parse_line: nargs=%d\n", nargs);
1108 argv[nargs++] = line; /* begin of argument string */
1110 /* find end of string */
1111 while (*line && !isblank(*line))
1114 if (*line == '\0') { /* end of line, no more args */
1117 printf ("parse_line: nargs=%d\n", nargs);
1122 *line++ = '\0'; /* terminate current arg */
1125 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS);
1128 printf ("parse_line: nargs=%d\n", nargs);
1133 /****************************************************************************/
1135 #ifndef CONFIG_SYS_HUSH_PARSER
1136 static void process_macros (const char *input, char *output)
1139 const char *varname_start = NULL;
1140 int inputcnt = strlen (input);
1141 int outputcnt = CONFIG_SYS_CBSIZE;
1142 int state = 0; /* 0 = waiting for '$' */
1144 /* 1 = waiting for '(' or '{' */
1145 /* 2 = waiting for ')' or '}' */
1146 /* 3 = waiting for ''' */
1148 char *output_start = output;
1150 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen (input),
1154 prev = '\0'; /* previous character */
1156 while (inputcnt && outputcnt) {
1161 /* remove one level of escape characters */
1162 if ((c == '\\') && (prev != '\\')) {
1163 if (inputcnt-- == 0)
1171 case 0: /* Waiting for (unescaped) $ */
1172 if ((c == '\'') && (prev != '\\')) {
1176 if ((c == '$') && (prev != '\\')) {
1183 case 1: /* Waiting for ( */
1184 if (c == '(' || c == '{') {
1186 varname_start = input;
1198 case 2: /* Waiting for ) */
1199 if (c == ')' || c == '}') {
1201 char envname[CONFIG_SYS_CBSIZE], *envval;
1202 int envcnt = input - varname_start - 1; /* Varname # of chars */
1204 /* Get the varname */
1205 for (i = 0; i < envcnt; i++) {
1206 envname[i] = varname_start[i];
1211 envval = getenv (envname);
1213 /* Copy into the line if it exists */
1215 while ((*envval) && outputcnt) {
1216 *(output++) = *(envval++);
1219 /* Look for another '$' */
1223 case 3: /* Waiting for ' */
1224 if ((c == '\'') && (prev != '\\')) {
1241 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
1242 strlen (output_start), output_start);
1246 /****************************************************************************
1248 * 1 - command executed, repeatable
1249 * 0 - command executed but not repeatable, interrupted commands are
1250 * always considered not repeatable
1251 * -1 - not executed (unrecognized, bootd recursion or too many args)
1252 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1253 * considered unrecognized)
1257 * We must create a temporary copy of the command since the command we get
1258 * may be the result from getenv(), which returns a pointer directly to
1259 * the environment data, which may change magicly when the command we run
1260 * creates or modifies environment variables (like "bootp" does).
1262 static int builtin_run_command(const char *cmd, int flag)
1264 char cmdbuf[CONFIG_SYS_CBSIZE]; /* working copy of cmd */
1265 char *token; /* start of token in cmdbuf */
1266 char *sep; /* end of token (separator) in cmdbuf */
1267 char finaltoken[CONFIG_SYS_CBSIZE];
1269 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
1275 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
1276 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */
1280 clear_ctrlc(); /* forget any previous Control C */
1282 if (!cmd || !*cmd) {
1283 return -1; /* empty command */
1286 if (strlen(cmd) >= CONFIG_SYS_CBSIZE) {
1287 puts ("## Command too long!\n");
1291 strcpy (cmdbuf, cmd);
1293 /* Process separators and check for invalid
1294 * repeatable commands
1298 printf ("[PROCESS_SEPARATORS] %s\n", cmd);
1303 * Find separator, or string end
1304 * Allow simple escape of ';' by writing "\;"
1306 for (inquotes = 0, sep = str; *sep; sep++) {
1312 (*sep == ';') && /* separator */
1313 ( sep != str) && /* past string start */
1314 (*(sep-1) != '\\')) /* and NOT escaped */
1319 * Limit the token to data between separators
1323 str = sep + 1; /* start of command for next pass */
1327 str = sep; /* no more commands for next pass */
1329 printf ("token: \"%s\"\n", token);
1332 /* find macros in this token and replace them */
1333 process_macros (token, finaltoken);
1335 /* Extract arguments */
1336 if ((argc = parse_line (finaltoken, argv)) == 0) {
1337 rc = -1; /* no command at all */
1341 if (cmd_process(flag, argc, argv, &repeatable))
1344 /* Did the user stop this? */
1346 return -1; /* if stopped then not repeatable */
1349 return rc ? rc : repeatable;
1354 * Run a command using the selected parser.
1356 * @param cmd Command to run
1357 * @param flag Execution flags (CMD_FLAG_...)
1358 * @return 0 on success, or != 0 on error.
1360 int run_command(const char *cmd, int flag)
1362 #ifndef CONFIG_SYS_HUSH_PARSER
1364 * builtin_run_command can return 0 or 1 for success, so clean up
1367 if (builtin_run_command(cmd, flag) == -1)
1372 return parse_string_outer(cmd,
1373 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
1377 #ifndef CONFIG_SYS_HUSH_PARSER
1379 * Execute a list of command separated by ; or \n using the built-in parser.
1381 * This function cannot take a const char * for the command, since if it
1382 * finds newlines in the string, it replaces them with \0.
1384 * @param cmd String containing list of commands
1385 * @param flag Execution flags (CMD_FLAG_...)
1386 * @return 0 on success, or != 0 on error.
1388 static int builtin_run_command_list(char *cmd, int flag)
1394 * Break into individual lines, and execute each line; terminate on
1399 if (*next == '\n') {
1401 /* run only non-empty commands */
1403 debug("** exec: \"%s\"\n", line);
1404 if (builtin_run_command(line, 0) < 0) {
1413 if (rcode == 0 && *line)
1414 rcode = (builtin_run_command(line, 0) >= 0);
1420 int run_command_list(const char *cmd, int len, int flag)
1423 char *buff = (char *)cmd; /* cast away const */
1428 #ifdef CONFIG_SYS_HUSH_PARSER
1429 /* hush will never change our string */
1432 /* the built-in parser will change our string if it sees \n */
1433 need_buff = strchr(cmd, '\n') != NULL;
1437 buff = malloc(len + 1);
1440 memcpy(buff, cmd, len);
1443 #ifdef CONFIG_SYS_HUSH_PARSER
1444 rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON);
1447 * This function will overwrite any \n it sees with a \0, which
1448 * is why it can't work with a const char *. Here we are making
1449 * using of internal knowledge of this function, to avoid always
1450 * doing a malloc() which is actually required only in a case that
1453 rcode = builtin_run_command_list(buff, flag);
1461 /****************************************************************************/
1463 #if defined(CONFIG_CMD_RUN)
1464 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1469 return CMD_RET_USAGE;
1471 for (i=1; i<argc; ++i) {
1474 if ((arg = getenv (argv[i])) == NULL) {
1475 printf ("## Error: \"%s\" not defined\n", argv[i]);
1479 if (run_command(arg, flag) != 0)