1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2000-2009
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * Command Processor Table
14 #include <linux/ctype.h>
17 * Use puts() instead of printf() to avoid printf buffer overflow
18 * for long help messages
21 int _do_help(cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t *cmdtp, int flag,
22 int argc, char * const argv[])
27 if (argc == 1) { /* show list of commands */
28 cmd_tbl_t *cmd_array[cmd_items];
31 /* Make array of commands from .uboot_cmd section */
33 for (i = 0; i < cmd_items; i++) {
34 cmd_array[i] = cmdtp++;
37 /* Sort command list (trivial bubble sort) */
38 for (i = cmd_items - 1; i > 0; --i) {
40 for (j = 0; j < i; ++j) {
41 if (strcmp(cmd_array[j]->name,
42 cmd_array[j + 1]->name) > 0) {
45 cmd_array[j] = cmd_array[j + 1];
46 cmd_array[j + 1] = tmp;
54 /* print short help (usage) */
55 for (i = 0; i < cmd_items; i++) {
56 const char *usage = cmd_array[i]->usage;
58 /* allow user abort */
63 printf("%-*s- %s\n", CONFIG_SYS_HELP_CMD_WIDTH,
64 cmd_array[i]->name, usage);
69 * command help (long version)
71 for (i = 1; i < argc; ++i) {
72 cmdtp = find_cmd_tbl(argv[i], cmd_start, cmd_items);
74 rcode |= cmd_usage(cmdtp);
76 printf("Unknown command '%s' - try 'help' without arguments for list of all known commands\n\n",
84 /* find command table entry for a command */
85 cmd_tbl_t *find_cmd_tbl(const char *cmd, cmd_tbl_t *table, int table_len)
89 cmd_tbl_t *cmdtp_temp = table; /* Init value */
97 * Some commands allow length modifiers (like "cp.b");
98 * compare command name only until first dot.
100 len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
102 for (cmdtp = table; cmdtp != table + table_len; cmdtp++) {
103 if (strncmp(cmd, cmdtp->name, len) == 0) {
104 if (len == strlen(cmdtp->name))
105 return cmdtp; /* full match */
107 cmdtp_temp = cmdtp; /* abbreviated command ? */
111 if (n_found == 1) { /* exactly one match */
114 #endif /* CONFIG_CMDLINE */
116 return NULL; /* not found or ambiguous command */
119 cmd_tbl_t *find_cmd(const char *cmd)
121 cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
122 const int len = ll_entry_count(cmd_tbl_t, cmd);
123 return find_cmd_tbl(cmd, start, len);
126 int cmd_usage(const cmd_tbl_t *cmdtp)
128 printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
130 #ifdef CONFIG_SYS_LONGHELP
131 printf("Usage:\n%s ", cmdtp->name);
134 puts ("- No additional help available.\n");
140 #endif /* CONFIG_SYS_LONGHELP */
144 #ifdef CONFIG_AUTO_COMPLETE
145 static char env_complete_buf[512];
147 int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
151 space = last_char == '\0' || isblank(last_char);
153 if (space && argc == 1)
154 return env_complete("", maxv, cmdv, sizeof(env_complete_buf),
155 env_complete_buf, false);
157 if (!space && argc == 2)
158 return env_complete(argv[1], maxv, cmdv,
159 sizeof(env_complete_buf),
160 env_complete_buf, false);
165 static int dollar_complete(int argc, char * const argv[], char last_char,
166 int maxv, char *cmdv[])
168 /* Make sure the last argument starts with a $. */
169 if (argc < 1 || argv[argc - 1][0] != '$' ||
170 last_char == '\0' || isblank(last_char))
173 return env_complete(argv[argc - 1], maxv, cmdv, sizeof(env_complete_buf),
174 env_complete_buf, true);
177 /*************************************************************************************/
179 int complete_subcmdv(cmd_tbl_t *cmdtp, int count, int argc,
180 char * const argv[], char last_char,
181 int maxv, char *cmdv[])
183 #ifdef CONFIG_CMDLINE
184 const cmd_tbl_t *cmdend = cmdtp + count;
197 /* output full list of commands */
198 for (; cmdtp != cmdend; cmdtp++) {
199 if (n_found >= maxv - 2) {
200 cmdv[n_found++] = "...";
203 cmdv[n_found++] = cmdtp->name;
205 cmdv[n_found] = NULL;
209 /* more than one arg or one but the start of the next */
210 if (argc > 1 || last_char == '\0' || isblank(last_char)) {
211 cmdtp = find_cmd_tbl(argv[0], cmdtp, count);
212 if (cmdtp == NULL || cmdtp->complete == NULL) {
216 return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
221 * Some commands allow length modifiers (like "cp.b");
222 * compare command name only until first dot.
224 p = strchr(cmd, '.');
230 /* return the partial matches */
231 for (; cmdtp != cmdend; cmdtp++) {
233 clen = strlen(cmdtp->name);
237 if (memcmp(cmd, cmdtp->name, len) != 0)
241 if (n_found >= maxv - 2) {
242 cmdv[n_found++] = "...";
246 cmdv[n_found++] = cmdtp->name;
249 cmdv[n_found] = NULL;
256 static int complete_cmdv(int argc, char * const argv[], char last_char,
257 int maxv, char *cmdv[])
259 #ifdef CONFIG_CMDLINE
260 return complete_subcmdv(ll_entry_start(cmd_tbl_t, cmd),
261 ll_entry_count(cmd_tbl_t, cmd), argc, argv,
262 last_char, maxv, cmdv);
268 static int make_argv(char *s, int argvsz, char *argv[])
272 /* split into argv */
273 while (argc < argvsz - 1) {
275 /* skip any white space */
279 if (*s == '\0') /* end of s, no more args */
282 argv[argc++] = s; /* begin of argument string */
284 /* find end of string */
285 while (*s && !isblank(*s))
288 if (*s == '\0') /* end of s, no more args */
291 *s++ = '\0'; /* terminate current arg */
298 static void print_argv(const char *banner, const char *leader, const char *sep, int linemax, char * const argv[])
300 int ll = leader != NULL ? strlen(leader) : 0;
301 int sl = sep != NULL ? strlen(sep) : 0;
309 i = linemax; /* force leader and newline */
310 while (*argv != NULL) {
311 len = strlen(*argv) + sl;
312 if (i + len >= linemax) {
325 static int find_common_prefix(char * const argv[])
328 char *anchor, *s, *t;
335 len = strlen(anchor);
336 while ((t = *argv++) != NULL) {
338 for (i = 0; i < len; i++, t++, s++) {
347 static char tmp_buf[CONFIG_SYS_CBSIZE + 1]; /* copy of console I/O buffer */
349 int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp)
351 int n = *np, col = *colp;
352 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
356 int i, j, k, len, seplen, argc;
360 if (strcmp(prompt, CONFIG_SYS_PROMPT) != 0)
361 return 0; /* not in normal console */
365 last_char = buf[cnt - 1];
369 /* copy to secondary buffer which will be affected */
370 strcpy(tmp_buf, buf);
372 /* separate into argv */
373 argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
375 /* first try a $ completion */
376 i = dollar_complete(argc, argv, last_char,
377 sizeof(cmdv) / sizeof(cmdv[0]), cmdv);
379 /* do the completion and return the possible completions */
380 i = complete_cmdv(argc, argv, last_char,
381 sizeof(cmdv) / sizeof(cmdv[0]), cmdv);
384 /* no match; bell and out */
386 if (argc > 1) /* allow tab for non command */
396 if (i == 1) { /* one match; perfect */
397 if (last_char != '\0' && !isblank(last_char))
398 k = strlen(argv[argc - 1]);
406 } else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
407 if (last_char != '\0' && !isblank(last_char))
408 k = strlen(argv[argc - 1]);
421 /* make sure it fits */
422 if (n + k >= CONFIG_SYS_CBSIZE - 2) {
428 for (i = 0; i < len; i++)
431 for (i = 0; i < seplen; i++)
442 print_argv(NULL, " ", " ", 78, cmdv);
453 int cmd_get_data_size(char* arg, int default_size)
455 /* Check for a size specification .b, .w or .l.
457 int len = strlen(arg);
458 if (len > 2 && arg[len-2] == '.') {
459 switch (arg[len-1]) {
466 #ifdef CONFIG_SYS_SUPPORT_64BIT_DATA
480 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
481 DECLARE_GLOBAL_DATA_PTR;
483 void fixup_cmdtable(cmd_tbl_t *cmdtp, int size)
487 if (gd->reloc_off == 0)
490 for (i = 0; i < size; i++) {
493 addr = (ulong)(cmdtp->cmd) + gd->reloc_off;
494 #ifdef DEBUG_COMMANDS
495 printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
496 cmdtp->name, (ulong)(cmdtp->cmd), addr);
499 (int (*)(struct cmd_tbl_s *, int, int, char * const []))addr;
500 addr = (ulong)(cmdtp->name) + gd->reloc_off;
501 cmdtp->name = (char *)addr;
503 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
504 cmdtp->usage = (char *)addr;
506 #ifdef CONFIG_SYS_LONGHELP
508 addr = (ulong)(cmdtp->help) + gd->reloc_off;
509 cmdtp->help = (char *)addr;
512 #ifdef CONFIG_AUTO_COMPLETE
513 if (cmdtp->complete) {
514 addr = (ulong)(cmdtp->complete) + gd->reloc_off;
516 (int (*)(int, char * const [], char, int, char * []))addr;
524 int cmd_always_repeatable(cmd_tbl_t *cmdtp, int flag, int argc,
525 char * const argv[], int *repeatable)
529 return cmdtp->cmd(cmdtp, flag, argc, argv);
532 int cmd_never_repeatable(cmd_tbl_t *cmdtp, int flag, int argc,
533 char * const argv[], int *repeatable)
537 return cmdtp->cmd(cmdtp, flag, argc, argv);
540 int cmd_discard_repeatable(cmd_tbl_t *cmdtp, int flag, int argc,
545 return cmdtp->cmd_rep(cmdtp, flag, argc, argv, &repeatable);
549 * Call a command function. This should be the only route in U-Boot to call
550 * a command, so that we can track whether we are waiting for input or
551 * executing a command.
553 * @param cmdtp Pointer to the command to execute
554 * @param flag Some flags normally 0 (see CMD_FLAG_.. above)
555 * @param argc Number of arguments (arg 0 must be the command text)
556 * @param argv Arguments
557 * @param repeatable Can the command be repeated
558 * @return 0 if command succeeded, else non-zero (CMD_RET_...)
560 static int cmd_call(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
565 result = cmdtp->cmd_rep(cmdtp, flag, argc, argv, repeatable);
567 debug("Command failed, result=%d\n", result);
571 enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
572 int *repeatable, ulong *ticks)
574 enum command_ret_t rc = CMD_RET_SUCCESS;
577 #if defined(CONFIG_SYS_XTRACE)
580 xtrace = env_get("xtrace");
583 for (int i = 0; i < argc; i++) {
591 /* Look up command in command table */
592 cmdtp = find_cmd(argv[0]);
594 printf("Unknown command '%s' - try 'help'\n", argv[0]);
598 /* found - check max args */
599 if (argc > cmdtp->maxargs)
602 #if defined(CONFIG_CMD_BOOTD)
603 /* avoid "bootd" recursion */
604 else if (cmdtp->cmd == do_bootd) {
605 if (flag & CMD_FLAG_BOOTD) {
606 puts("'bootd' recursion detected\n");
607 rc = CMD_RET_FAILURE;
609 flag |= CMD_FLAG_BOOTD;
614 /* If OK so far, then do the command */
619 *ticks = get_timer(0);
620 rc = cmd_call(cmdtp, flag, argc, argv, &newrep);
622 *ticks = get_timer(*ticks);
623 *repeatable &= newrep;
625 if (rc == CMD_RET_USAGE)
626 rc = cmd_usage(cmdtp);
630 int cmd_process_error(cmd_tbl_t *cmdtp, int err)
632 if (err == CMD_RET_USAGE)
633 return CMD_RET_USAGE;
636 printf("Command '%s' failed: Error %d\n", cmdtp->name, err);
637 return CMD_RET_FAILURE;
640 return CMD_RET_SUCCESS;