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 * SPDX-License-Identifier: GPL-2.0+
23 #include <linux/ctype.h>
25 DECLARE_GLOBAL_DATA_PTR
;
28 * Board-specific Platform code can reimplement show_boot_progress () if needed
30 void inline __show_boot_progress (int val
) {}
31 void show_boot_progress (int val
) __attribute__((weak
, alias("__show_boot_progress")));
33 #define MAX_DELAY_STOP_STR 32
35 #define DEBUG_PARSER 0 /* set to 1 to debug */
37 #define debug_parser(fmt, args...) \
38 debug_cond(DEBUG_PARSER, fmt, ##args)
40 #ifndef DEBUG_BOOTKEYS
41 #define DEBUG_BOOTKEYS 0
43 #define debug_bootkeys(fmt, args...) \
44 debug_cond(DEBUG_BOOTKEYS, fmt, ##args)
46 char console_buffer
[CONFIG_SYS_CBSIZE
+ 1]; /* console I/O buffer */
48 static char * delete_char (char *buffer
, char *p
, int *colp
, int *np
, int plen
);
49 static const char erase_seq
[] = "\b \b"; /* erase sequence */
50 static const char tab_seq
[] = " "; /* used to expand TABs */
52 #ifdef CONFIG_BOOT_RETRY_TIME
53 static uint64_t endtime
= 0; /* must be set, default is instant timeout */
54 static int retry_time
= -1; /* -1 so can call readline before main_loop */
57 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
59 #ifndef CONFIG_BOOT_RETRY_MIN
60 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
63 #ifdef CONFIG_MODEM_SUPPORT
65 extern void mdm_init(void); /* defined in board.c */
68 /***************************************************************************
69 * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
70 * returns: 0 - no key string, allow autoboot 1 - got key string, abort
72 #if defined(CONFIG_BOOTDELAY)
73 # if defined(CONFIG_AUTOBOOT_KEYED)
74 static int abortboot_keyed(int bootdelay
)
77 uint64_t etime
= endtick(bootdelay
);
84 { str
: getenv ("bootdelaykey"), retry
: 1 },
85 { str
: getenv ("bootdelaykey2"), retry
: 1 },
86 { str
: getenv ("bootstopkey"), retry
: 0 },
87 { str
: getenv ("bootstopkey2"), retry
: 0 },
90 char presskey
[MAX_DELAY_STOP_STR
];
91 u_int presskey_len
= 0;
92 u_int presskey_max
= 0;
95 #ifndef CONFIG_ZERO_BOOTDELAY_CHECK
100 # ifdef CONFIG_AUTOBOOT_PROMPT
101 printf(CONFIG_AUTOBOOT_PROMPT
);
104 # ifdef CONFIG_AUTOBOOT_DELAY_STR
105 if (delaykey
[0].str
== NULL
)
106 delaykey
[0].str
= CONFIG_AUTOBOOT_DELAY_STR
;
108 # ifdef CONFIG_AUTOBOOT_DELAY_STR2
109 if (delaykey
[1].str
== NULL
)
110 delaykey
[1].str
= CONFIG_AUTOBOOT_DELAY_STR2
;
112 # ifdef CONFIG_AUTOBOOT_STOP_STR
113 if (delaykey
[2].str
== NULL
)
114 delaykey
[2].str
= CONFIG_AUTOBOOT_STOP_STR
;
116 # ifdef CONFIG_AUTOBOOT_STOP_STR2
117 if (delaykey
[3].str
== NULL
)
118 delaykey
[3].str
= CONFIG_AUTOBOOT_STOP_STR2
;
121 for (i
= 0; i
< sizeof(delaykey
) / sizeof(delaykey
[0]); i
++) {
122 delaykey
[i
].len
= delaykey
[i
].str
== NULL
?
123 0 : strlen (delaykey
[i
].str
);
124 delaykey
[i
].len
= delaykey
[i
].len
> MAX_DELAY_STOP_STR
?
125 MAX_DELAY_STOP_STR
: delaykey
[i
].len
;
127 presskey_max
= presskey_max
> delaykey
[i
].len
?
128 presskey_max
: delaykey
[i
].len
;
130 debug_bootkeys("%s key:<%s>\n",
131 delaykey
[i
].retry
? "delay" : "stop",
132 delaykey
[i
].str
? delaykey
[i
].str
: "NULL");
135 /* In order to keep up with incoming data, check timeout only
140 if (presskey_len
< presskey_max
) {
141 presskey
[presskey_len
++] = getc();
144 for (i
= 0; i
< presskey_max
- 1; i
++)
145 presskey
[i
] = presskey
[i
+ 1];
147 presskey
[i
] = getc();
151 for (i
= 0; i
< sizeof(delaykey
) / sizeof(delaykey
[0]); i
++) {
152 if (delaykey
[i
].len
> 0 &&
153 presskey_len
>= delaykey
[i
].len
&&
154 memcmp (presskey
+ presskey_len
- delaykey
[i
].len
,
156 delaykey
[i
].len
) == 0) {
157 debug_bootkeys("got %skey\n",
158 delaykey
[i
].retry
? "delay" :
161 # ifdef CONFIG_BOOT_RETRY_TIME
162 /* don't retry auto boot */
163 if (! delaykey
[i
].retry
)
169 } while (!abort
&& get_ticks() <= etime
);
172 debug_bootkeys("key timeout\n");
174 #ifdef CONFIG_SILENT_CONSOLE
176 gd
->flags
&= ~GD_FLG_SILENT
;
182 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */
184 #ifdef CONFIG_MENUKEY
185 static int menukey
= 0;
188 static int abortboot_normal(int bootdelay
)
193 #ifdef CONFIG_MENUPROMPT
194 printf(CONFIG_MENUPROMPT
);
197 printf("Hit any key to stop autoboot: %2d ", bootdelay
);
200 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
202 * Check if key already pressed
203 * Don't check if bootdelay < 0
205 if (bootdelay
>= 0) {
206 if (tstc()) { /* we got a key press */
207 (void) getc(); /* consume input */
209 abort
= 1; /* don't auto boot */
214 while ((bootdelay
> 0) && (!abort
)) {
219 if (tstc()) { /* we got a key press */
220 abort
= 1; /* don't auto boot */
221 bootdelay
= 0; /* no more delay */
222 # ifdef CONFIG_MENUKEY
225 (void) getc(); /* consume input */
230 } while (!abort
&& get_timer(ts
) < 1000);
232 printf("\b\b\b%2d ", bootdelay
);
237 #ifdef CONFIG_SILENT_CONSOLE
239 gd
->flags
&= ~GD_FLG_SILENT
;
244 # endif /* CONFIG_AUTOBOOT_KEYED */
246 static int abortboot(int bootdelay
)
248 #ifdef CONFIG_AUTOBOOT_KEYED
249 return abortboot_keyed(bootdelay
);
251 return abortboot_normal(bootdelay
);
254 #endif /* CONFIG_BOOTDELAY */
257 * Runs the given boot command securely. Specifically:
258 * - Doesn't run the command with the shell (run_command or parse_string_outer),
259 * since that's a lot of code surface that an attacker might exploit.
260 * Because of this, we don't do any argument parsing--the secure boot command
261 * has to be a full-fledged u-boot command.
262 * - Doesn't check for keypresses before booting, since that could be a
263 * security hole; also disables Ctrl-C.
264 * - Doesn't allow the command to return.
266 * Upon any failures, this function will drop into an infinite loop after
267 * printing the error message to console.
270 #if defined(CONFIG_BOOTDELAY) && defined(CONFIG_OF_CONTROL)
271 static void secure_boot_cmd(char *cmd
)
277 printf("## Error: Secure boot command not specified\n");
281 /* Disable Ctrl-C just in case some command is used that checks it. */
284 /* Find the command directly. */
285 cmdtp
= find_cmd(cmd
);
287 printf("## Error: \"%s\" not defined\n", cmd
);
291 /* Run the command, forcing no flags and faking argc and argv. */
292 rc
= (cmdtp
->cmd
)(cmdtp
, 0, 1, &cmd
);
294 /* Shouldn't ever return from boot command. */
295 printf("## Error: \"%s\" returned (code %d)\n", cmd
, rc
);
299 * Not a whole lot to do here. Rebooting won't help much, since we'll
300 * just end up right back here. Just loop.
305 static void process_fdt_options(const void *blob
)
309 /* Add an env variable to point to a kernel payload, if available */
310 addr
= fdtdec_get_config_int(gd
->fdt_blob
, "kernel-offset", 0);
312 setenv_addr("kernaddr", (void *)(CONFIG_SYS_TEXT_BASE
+ addr
));
314 /* Add an env variable to point to a root disk, if available */
315 addr
= fdtdec_get_config_int(gd
->fdt_blob
, "rootdisk-offset", 0);
317 setenv_addr("rootaddr", (void *)(CONFIG_SYS_TEXT_BASE
+ addr
));
319 #endif /* CONFIG_OF_CONTROL */
321 #ifdef CONFIG_BOOTDELAY
322 static void process_boot_delay(void)
324 #ifdef CONFIG_OF_CONTROL
329 #ifdef CONFIG_BOOTCOUNT_LIMIT
330 unsigned long bootcount
= 0;
331 unsigned long bootlimit
= 0;
332 #endif /* CONFIG_BOOTCOUNT_LIMIT */
334 #ifdef CONFIG_BOOTCOUNT_LIMIT
335 bootcount
= bootcount_load();
337 bootcount_store (bootcount
);
338 setenv_ulong("bootcount", bootcount
);
339 bootlimit
= getenv_ulong("bootlimit", 10, 0);
340 #endif /* CONFIG_BOOTCOUNT_LIMIT */
342 s
= getenv ("bootdelay");
343 bootdelay
= s
? (int)simple_strtol(s
, NULL
, 10) : CONFIG_BOOTDELAY
;
345 #ifdef CONFIG_OF_CONTROL
346 bootdelay
= fdtdec_get_config_int(gd
->fdt_blob
, "bootdelay",
350 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay
);
352 #if defined(CONFIG_MENU_SHOW)
353 bootdelay
= menu_show(bootdelay
);
355 # ifdef CONFIG_BOOT_RETRY_TIME
357 # endif /* CONFIG_BOOT_RETRY_TIME */
360 if (gd
->flags
& GD_FLG_POSTFAIL
) {
361 s
= getenv("failbootcmd");
364 #endif /* CONFIG_POST */
365 #ifdef CONFIG_BOOTCOUNT_LIMIT
366 if (bootlimit
&& (bootcount
> bootlimit
)) {
367 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
368 (unsigned)bootlimit
);
369 s
= getenv ("altbootcmd");
372 #endif /* CONFIG_BOOTCOUNT_LIMIT */
373 s
= getenv ("bootcmd");
374 #ifdef CONFIG_OF_CONTROL
375 /* Allow the fdt to override the boot command */
376 env
= fdtdec_get_config_string(gd
->fdt_blob
, "bootcmd");
380 process_fdt_options(gd
->fdt_blob
);
383 * If the bootsecure option was chosen, use secure_boot_cmd().
384 * Always use 'env' in this case, since bootsecure requres that the
385 * bootcmd was specified in the FDT too.
387 if (fdtdec_get_config_int(gd
->fdt_blob
, "bootsecure", 0))
388 secure_boot_cmd(env
);
390 #endif /* CONFIG_OF_CONTROL */
392 debug ("### main_loop: bootcmd=\"%s\"\n", s
? s
: "<UNDEFINED>");
394 if (bootdelay
!= -1 && s
&& !abortboot(bootdelay
)) {
395 #ifdef CONFIG_AUTOBOOT_KEYED
396 int prev
= disable_ctrlc(1); /* disable Control C checking */
399 run_command_list(s
, -1, 0);
401 #ifdef CONFIG_AUTOBOOT_KEYED
402 disable_ctrlc(prev
); /* restore Control C checking */
406 #ifdef CONFIG_MENUKEY
407 if (menukey
== CONFIG_MENUKEY
) {
408 s
= getenv("menucmd");
410 run_command_list(s
, -1, 0);
412 #endif /* CONFIG_MENUKEY */
414 #endif /* CONFIG_BOOTDELAY */
418 #ifndef CONFIG_SYS_HUSH_PARSER
419 static char lastcommand
[CONFIG_SYS_CBSIZE
] = { 0, };
424 #ifdef CONFIG_PREBOOT
428 bootstage_mark_name(BOOTSTAGE_ID_MAIN_LOOP
, "main_loop");
430 #ifdef CONFIG_MODEM_SUPPORT
431 debug("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init
);
433 char *str
= strdup(getenv("mdm_cmd"));
434 setenv("preboot", str
); /* set or delete definition */
437 mdm_init(); /* wait for modem connection */
439 #endif /* CONFIG_MODEM_SUPPORT */
441 #ifdef CONFIG_VERSION_VARIABLE
443 setenv("ver", version_string
); /* set version variable */
445 #endif /* CONFIG_VERSION_VARIABLE */
447 #ifdef CONFIG_SYS_HUSH_PARSER
451 #if defined(CONFIG_HUSH_INIT_VAR)
455 #ifdef CONFIG_PREBOOT
456 p
= getenv("preboot");
458 # ifdef CONFIG_AUTOBOOT_KEYED
459 int prev
= disable_ctrlc(1); /* disable Control C checking */
462 run_command_list(p
, -1, 0);
464 # ifdef CONFIG_AUTOBOOT_KEYED
465 disable_ctrlc(prev
); /* restore Control C checking */
468 #endif /* CONFIG_PREBOOT */
470 #if defined(CONFIG_UPDATE_TFTP)
472 #endif /* CONFIG_UPDATE_TFTP */
474 #ifdef CONFIG_BOOTDELAY
475 process_boot_delay();
478 * Main Loop for Monitor Command Processing
480 #ifdef CONFIG_SYS_HUSH_PARSER
482 /* This point is never reached */
486 #ifdef CONFIG_BOOT_RETRY_TIME
488 /* Saw enough of a valid command to
489 * restart the timeout.
494 len
= readline (CONFIG_SYS_PROMPT
);
496 flag
= 0; /* assume no special flags for now */
498 strcpy (lastcommand
, console_buffer
);
500 flag
|= CMD_FLAG_REPEAT
;
501 #ifdef CONFIG_BOOT_RETRY_TIME
502 else if (len
== -2) {
503 /* -2 means timed out, retry autoboot
505 puts ("\nTimed out waiting for command\n");
506 # ifdef CONFIG_RESET_TO_RETRY
507 /* Reinit board to run initialization code again */
508 do_reset (NULL
, 0, 0, NULL
);
510 return; /* retry autoboot */
516 puts ("<INTERRUPT>\n");
518 rc
= run_command(lastcommand
, flag
);
521 /* invalid command or not repeatable, forget it */
525 #endif /*CONFIG_SYS_HUSH_PARSER*/
528 #ifdef CONFIG_BOOT_RETRY_TIME
529 /***************************************************************************
530 * initialize command line timeout
532 void init_cmd_timeout(void)
534 char *s
= getenv ("bootretry");
537 retry_time
= (int)simple_strtol(s
, NULL
, 10);
539 retry_time
= CONFIG_BOOT_RETRY_TIME
;
541 if (retry_time
>= 0 && retry_time
< CONFIG_BOOT_RETRY_MIN
)
542 retry_time
= CONFIG_BOOT_RETRY_MIN
;
545 /***************************************************************************
546 * reset command line timeout to retry_time seconds
548 void reset_cmd_timeout(void)
550 endtime
= endtick(retry_time
);
554 #ifdef CONFIG_CMDLINE_EDITING
557 * cmdline-editing related codes from vivi.
558 * Author: Janghoon Lyu <nandy@mizi.com>
561 #define putnstr(str,n) do { \
562 printf ("%.*s", (int)n, str); \
565 #define CTL_CH(c) ((c) - 'a' + 1)
566 #define CTL_BACKSPACE ('\b')
567 #define DEL ((char)255)
568 #define DEL7 ((char)127)
569 #define CREAD_HIST_CHAR ('!')
571 #define getcmd_putch(ch) putc(ch)
572 #define getcmd_getch() getc()
573 #define getcmd_cbeep() getcmd_putch('\a')
576 #define HIST_SIZE CONFIG_SYS_CBSIZE
579 static int hist_add_idx
;
580 static int hist_cur
= -1;
581 static unsigned hist_num
;
583 static char *hist_list
[HIST_MAX
];
584 static char hist_lines
[HIST_MAX
][HIST_SIZE
+ 1]; /* Save room for NULL */
586 #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1)
588 static void hist_init(void)
597 for (i
= 0; i
< HIST_MAX
; i
++) {
598 hist_list
[i
] = hist_lines
[i
];
599 hist_list
[i
][0] = '\0';
603 static void cread_add_to_hist(char *line
)
605 strcpy(hist_list
[hist_add_idx
], line
);
607 if (++hist_add_idx
>= HIST_MAX
)
610 if (hist_add_idx
> hist_max
)
611 hist_max
= hist_add_idx
;
616 static char* hist_prev(void)
628 if (hist_cur
== hist_add_idx
) {
632 ret
= hist_list
[hist_cur
];
637 static char* hist_next(void)
644 if (hist_cur
== hist_add_idx
)
647 if (++hist_cur
> hist_max
)
650 if (hist_cur
== hist_add_idx
) {
653 ret
= hist_list
[hist_cur
];
658 #ifndef CONFIG_CMDLINE_EDITING
659 static void cread_print_hist_list(void)
664 n
= hist_num
- hist_max
;
666 i
= hist_add_idx
+ 1;
670 if (i
== hist_add_idx
)
672 printf("%s\n", hist_list
[i
]);
677 #endif /* CONFIG_CMDLINE_EDITING */
679 #define BEGINNING_OF_LINE() { \
681 getcmd_putch(CTL_BACKSPACE); \
686 #define ERASE_TO_EOL() { \
687 if (num < eol_num) { \
688 printf("%*s", (int)(eol_num - num), ""); \
690 getcmd_putch(CTL_BACKSPACE); \
691 } while (--eol_num > num); \
695 #define REFRESH_TO_EOL() { \
696 if (num < eol_num) { \
697 wlen = eol_num - num; \
698 putnstr(buf + num, wlen); \
703 static void cread_add_char(char ichar
, int insert
, unsigned long *num
,
704 unsigned long *eol_num
, char *buf
, unsigned long len
)
709 if (insert
|| *num
== *eol_num
) {
710 if (*eol_num
> len
- 1) {
718 wlen
= *eol_num
- *num
;
720 memmove(&buf
[*num
+1], &buf
[*num
], wlen
-1);
724 putnstr(buf
+ *num
, wlen
);
727 getcmd_putch(CTL_BACKSPACE
);
730 /* echo the character */
733 putnstr(buf
+ *num
, wlen
);
738 static void cread_add_str(char *str
, int strsize
, int insert
, unsigned long *num
,
739 unsigned long *eol_num
, char *buf
, unsigned long len
)
742 cread_add_char(*str
, insert
, num
, eol_num
, buf
, len
);
747 static int cread_line(const char *const prompt
, char *buf
, unsigned int *len
,
750 unsigned long num
= 0;
751 unsigned long eol_num
= 0;
757 int init_len
= strlen(buf
);
761 cread_add_str(buf
, init_len
, 1, &num
, &eol_num
, buf
, *len
);
764 #ifdef CONFIG_BOOT_RETRY_TIME
765 while (!tstc()) { /* while no incoming data */
766 if (retry_time
>= 0 && get_ticks() > endtime
)
767 return (-2); /* timed out */
771 if (first
&& timeout
) {
772 uint64_t etime
= endtick(timeout
);
774 while (!tstc()) { /* while no incoming data */
775 if (get_ticks() >= etime
)
776 return -2; /* timed out */
782 ichar
= getcmd_getch();
784 if ((ichar
== '\n') || (ichar
== '\r')) {
790 * handle standard linux xterm esc sequences for arrow key, etc.
795 esc_save
[esc_len
] = ichar
;
798 cread_add_str(esc_save
, esc_len
, insert
,
799 &num
, &eol_num
, buf
, *len
);
807 case 'D': /* <- key */
811 case 'C': /* -> key */
814 break; /* pass off to ^F handler */
815 case 'H': /* Home key */
818 break; /* pass off to ^A handler */
819 case 'A': /* up arrow */
822 break; /* pass off to ^P handler */
823 case 'B': /* down arrow */
826 break; /* pass off to ^N handler */
828 esc_save
[esc_len
++] = ichar
;
829 cread_add_str(esc_save
, esc_len
, insert
,
830 &num
, &eol_num
, buf
, *len
);
839 esc_save
[esc_len
] = ichar
;
842 puts("impossible condition #876\n");
850 case CTL_CH('c'): /* ^C - break */
851 *buf
= '\0'; /* discard input */
855 getcmd_putch(buf
[num
]);
861 getcmd_putch(CTL_BACKSPACE
);
867 wlen
= eol_num
- num
- 1;
869 memmove(&buf
[num
], &buf
[num
+1], wlen
);
870 putnstr(buf
+ num
, wlen
);
875 getcmd_putch(CTL_BACKSPACE
);
898 wlen
= eol_num
- num
;
900 memmove(&buf
[num
], &buf
[num
+1], wlen
);
901 getcmd_putch(CTL_BACKSPACE
);
902 putnstr(buf
+ num
, wlen
);
905 getcmd_putch(CTL_BACKSPACE
);
917 if (ichar
== CTL_CH('p'))
927 /* nuke the current line */
931 /* erase to end of line */
934 /* copy new line into place and display */
936 eol_num
= strlen(buf
);
940 #ifdef CONFIG_AUTO_COMPLETE
944 /* do not autocomplete when in the middle */
951 col
= strlen(prompt
) + eol_num
;
953 if (cmd_auto_complete(prompt
, buf
, &num2
, &col
)) {
962 cread_add_char(ichar
, insert
, &num
, &eol_num
, buf
, *len
);
967 buf
[eol_num
] = '\0'; /* lose the newline */
969 if (buf
[0] && buf
[0] != CREAD_HIST_CHAR
)
970 cread_add_to_hist(buf
);
971 hist_cur
= hist_add_idx
;
976 #endif /* CONFIG_CMDLINE_EDITING */
978 /****************************************************************************/
981 * Prompt for input and read a line.
982 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
983 * time out when time goes past endtime (timebase time in ticks).
984 * Return: number of read characters
988 int readline (const char *const prompt
)
991 * If console_buffer isn't 0-length the user will be prompted to modify
992 * it instead of entering it from scratch as desired.
994 console_buffer
[0] = '\0';
996 return readline_into_buffer(prompt
, console_buffer
, 0);
1000 int readline_into_buffer(const char *const prompt
, char *buffer
, int timeout
)
1003 #ifdef CONFIG_CMDLINE_EDITING
1004 unsigned int len
= CONFIG_SYS_CBSIZE
;
1006 static int initted
= 0;
1009 * History uses a global array which is not
1010 * writable until after relocation to RAM.
1011 * Revert to non-history version if still
1012 * running from flash.
1014 if (gd
->flags
& GD_FLG_RELOC
) {
1023 rc
= cread_line(prompt
, p
, &len
, timeout
);
1024 return rc
< 0 ? rc
: len
;
1027 #endif /* CONFIG_CMDLINE_EDITING */
1029 int n
= 0; /* buffer index */
1030 int plen
= 0; /* prompt length */
1031 int col
; /* output column cnt */
1036 plen
= strlen (prompt
);
1042 #ifdef CONFIG_BOOT_RETRY_TIME
1043 while (!tstc()) { /* while no incoming data */
1044 if (retry_time
>= 0 && get_ticks() > endtime
)
1045 return (-2); /* timed out */
1049 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
1051 #ifdef CONFIG_SHOW_ACTIVITY
1060 * Special character handling
1063 case '\r': /* Enter */
1069 case '\0': /* nul */
1072 case 0x03: /* ^C - break */
1073 p_buf
[0] = '\0'; /* discard input */
1076 case 0x15: /* ^U - erase line */
1077 while (col
> plen
) {
1085 case 0x17: /* ^W - erase word */
1086 p
=delete_char(p_buf
, p
, &col
, &n
, plen
);
1087 while ((n
> 0) && (*p
!= ' ')) {
1088 p
=delete_char(p_buf
, p
, &col
, &n
, plen
);
1092 case 0x08: /* ^H - backspace */
1093 case 0x7F: /* DEL - backspace */
1094 p
=delete_char(p_buf
, p
, &col
, &n
, plen
);
1099 * Must be a normal character then
1101 if (n
< CONFIG_SYS_CBSIZE
-2) {
1102 if (c
== '\t') { /* expand TABs */
1103 #ifdef CONFIG_AUTO_COMPLETE
1104 /* if auto completion triggered just continue */
1106 if (cmd_auto_complete(prompt
, console_buffer
, &n
, &col
)) {
1107 p
= p_buf
+ n
; /* reset */
1111 puts (tab_seq
+(col
&07));
1112 col
+= 8 - (col
&07);
1117 * Echo input using puts() to force an
1118 * LCD flush if we are using an LCD
1127 } else { /* Buffer full */
1132 #ifdef CONFIG_CMDLINE_EDITING
1137 /****************************************************************************/
1139 static char * delete_char (char *buffer
, char *p
, int *colp
, int *np
, int plen
)
1147 if (*(--p
) == '\t') { /* will retype the whole line */
1148 while (*colp
> plen
) {
1152 for (s
=buffer
; s
<p
; ++s
) {
1154 puts (tab_seq
+((*colp
) & 07));
1155 *colp
+= 8 - ((*colp
) & 07);
1169 /****************************************************************************/
1171 int parse_line (char *line
, char *argv
[])
1175 debug_parser("parse_line: \"%s\"\n", line
);
1176 while (nargs
< CONFIG_SYS_MAXARGS
) {
1178 /* skip any white space */
1179 while (isblank(*line
))
1182 if (*line
== '\0') { /* end of line, no more args */
1184 debug_parser("parse_line: nargs=%d\n", nargs
);
1188 argv
[nargs
++] = line
; /* begin of argument string */
1190 /* find end of string */
1191 while (*line
&& !isblank(*line
))
1194 if (*line
== '\0') { /* end of line, no more args */
1196 debug_parser("parse_line: nargs=%d\n", nargs
);
1200 *line
++ = '\0'; /* terminate current arg */
1203 printf ("** Too many args (max. %d) **\n", CONFIG_SYS_MAXARGS
);
1205 debug_parser("parse_line: nargs=%d\n", nargs
);
1209 /****************************************************************************/
1211 #ifndef CONFIG_SYS_HUSH_PARSER
1212 static void process_macros (const char *input
, char *output
)
1215 const char *varname_start
= NULL
;
1216 int inputcnt
= strlen (input
);
1217 int outputcnt
= CONFIG_SYS_CBSIZE
;
1218 int state
= 0; /* 0 = waiting for '$' */
1220 /* 1 = waiting for '(' or '{' */
1221 /* 2 = waiting for ')' or '}' */
1222 /* 3 = waiting for ''' */
1223 char *output_start
= output
;
1225 debug_parser("[PROCESS_MACROS] INPUT len %zd: \"%s\"\n", strlen(input
),
1228 prev
= '\0'; /* previous character */
1230 while (inputcnt
&& outputcnt
) {
1235 /* remove one level of escape characters */
1236 if ((c
== '\\') && (prev
!= '\\')) {
1237 if (inputcnt
-- == 0)
1245 case 0: /* Waiting for (unescaped) $ */
1246 if ((c
== '\'') && (prev
!= '\\')) {
1250 if ((c
== '$') && (prev
!= '\\')) {
1257 case 1: /* Waiting for ( */
1258 if (c
== '(' || c
== '{') {
1260 varname_start
= input
;
1272 case 2: /* Waiting for ) */
1273 if (c
== ')' || c
== '}') {
1275 char envname
[CONFIG_SYS_CBSIZE
], *envval
;
1276 int envcnt
= input
- varname_start
- 1; /* Varname # of chars */
1278 /* Get the varname */
1279 for (i
= 0; i
< envcnt
; i
++) {
1280 envname
[i
] = varname_start
[i
];
1285 envval
= getenv (envname
);
1287 /* Copy into the line if it exists */
1289 while ((*envval
) && outputcnt
) {
1290 *(output
++) = *(envval
++);
1293 /* Look for another '$' */
1297 case 3: /* Waiting for ' */
1298 if ((c
== '\'') && (prev
!= '\\')) {
1314 debug_parser("[PROCESS_MACROS] OUTPUT len %zd: \"%s\"\n",
1315 strlen(output_start
), output_start
);
1318 /****************************************************************************
1320 * 1 - command executed, repeatable
1321 * 0 - command executed but not repeatable, interrupted commands are
1322 * always considered not repeatable
1323 * -1 - not executed (unrecognized, bootd recursion or too many args)
1324 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
1325 * considered unrecognized)
1329 * We must create a temporary copy of the command since the command we get
1330 * may be the result from getenv(), which returns a pointer directly to
1331 * the environment data, which may change magicly when the command we run
1332 * creates or modifies environment variables (like "bootp" does).
1334 static int builtin_run_command(const char *cmd
, int flag
)
1336 char cmdbuf
[CONFIG_SYS_CBSIZE
]; /* working copy of cmd */
1337 char *token
; /* start of token in cmdbuf */
1338 char *sep
; /* end of token (separator) in cmdbuf */
1339 char finaltoken
[CONFIG_SYS_CBSIZE
];
1341 char *argv
[CONFIG_SYS_MAXARGS
+ 1]; /* NULL terminated */
1346 debug_parser("[RUN_COMMAND] cmd[%p]=\"", cmd
);
1348 /* use puts - string may be loooong */
1349 puts(cmd
? cmd
: "NULL");
1352 clear_ctrlc(); /* forget any previous Control C */
1354 if (!cmd
|| !*cmd
) {
1355 return -1; /* empty command */
1358 if (strlen(cmd
) >= CONFIG_SYS_CBSIZE
) {
1359 puts ("## Command too long!\n");
1363 strcpy (cmdbuf
, cmd
);
1365 /* Process separators and check for invalid
1366 * repeatable commands
1369 debug_parser("[PROCESS_SEPARATORS] %s\n", cmd
);
1373 * Find separator, or string end
1374 * Allow simple escape of ';' by writing "\;"
1376 for (inquotes
= 0, sep
= str
; *sep
; sep
++) {
1382 (*sep
== ';') && /* separator */
1383 ( sep
!= str
) && /* past string start */
1384 (*(sep
-1) != '\\')) /* and NOT escaped */
1389 * Limit the token to data between separators
1393 str
= sep
+ 1; /* start of command for next pass */
1397 str
= sep
; /* no more commands for next pass */
1398 debug_parser("token: \"%s\"\n", token
);
1400 /* find macros in this token and replace them */
1401 process_macros (token
, finaltoken
);
1403 /* Extract arguments */
1404 if ((argc
= parse_line (finaltoken
, argv
)) == 0) {
1405 rc
= -1; /* no command at all */
1409 if (cmd_process(flag
, argc
, argv
, &repeatable
, NULL
))
1412 /* Did the user stop this? */
1414 return -1; /* if stopped then not repeatable */
1417 return rc
? rc
: repeatable
;
1422 * Run a command using the selected parser.
1424 * @param cmd Command to run
1425 * @param flag Execution flags (CMD_FLAG_...)
1426 * @return 0 on success, or != 0 on error.
1428 int run_command(const char *cmd
, int flag
)
1430 #ifndef CONFIG_SYS_HUSH_PARSER
1432 * builtin_run_command can return 0 or 1 for success, so clean up
1435 if (builtin_run_command(cmd
, flag
) == -1)
1440 return parse_string_outer(cmd
,
1441 FLAG_PARSE_SEMICOLON
| FLAG_EXIT_FROM_LOOP
);
1445 #ifndef CONFIG_SYS_HUSH_PARSER
1447 * Execute a list of command separated by ; or \n using the built-in parser.
1449 * This function cannot take a const char * for the command, since if it
1450 * finds newlines in the string, it replaces them with \0.
1452 * @param cmd String containing list of commands
1453 * @param flag Execution flags (CMD_FLAG_...)
1454 * @return 0 on success, or != 0 on error.
1456 static int builtin_run_command_list(char *cmd
, int flag
)
1462 * Break into individual lines, and execute each line; terminate on
1467 if (*next
== '\n') {
1469 /* run only non-empty commands */
1471 debug("** exec: \"%s\"\n", line
);
1472 if (builtin_run_command(line
, 0) < 0) {
1481 if (rcode
== 0 && *line
)
1482 rcode
= (builtin_run_command(line
, 0) >= 0);
1488 int run_command_list(const char *cmd
, int len
, int flag
)
1491 char *buff
= (char *)cmd
; /* cast away const */
1496 #ifdef CONFIG_SYS_HUSH_PARSER
1497 /* hush will never change our string */
1500 /* the built-in parser will change our string if it sees \n */
1501 need_buff
= strchr(cmd
, '\n') != NULL
;
1505 buff
= malloc(len
+ 1);
1508 memcpy(buff
, cmd
, len
);
1511 #ifdef CONFIG_SYS_HUSH_PARSER
1512 rcode
= parse_string_outer(buff
, FLAG_PARSE_SEMICOLON
);
1515 * This function will overwrite any \n it sees with a \0, which
1516 * is why it can't work with a const char *. Here we are making
1517 * using of internal knowledge of this function, to avoid always
1518 * doing a malloc() which is actually required only in a case that
1521 rcode
= builtin_run_command_list(buff
, flag
);
1529 /****************************************************************************/
1531 #if defined(CONFIG_CMD_RUN)
1532 int do_run (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char * const argv
[])
1537 return CMD_RET_USAGE
;
1539 for (i
=1; i
<argc
; ++i
) {
1542 if ((arg
= getenv (argv
[i
])) == NULL
) {
1543 printf ("## Error: \"%s\" not defined\n", argv
[i
]);
1547 if (run_command(arg
, flag
) != 0)