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
15 #include <linux/ctype.h>
18 * Use puts() instead of printf() to avoid printf buffer overflow
19 * for long help messages
22 int _do_help(struct cmd_tbl *cmd_start, int cmd_items, struct cmd_tbl *cmdtp,
23 int flag, int argc, char *const argv[])
28 if (argc == 1) { /* show list of commands */
29 struct cmd_tbl *cmd_array[cmd_items];
32 /* Make array of commands from .uboot_cmd section */
34 for (i = 0; i < cmd_items; i++) {
35 cmd_array[i] = cmdtp++;
38 /* Sort command list (trivial bubble sort) */
39 for (i = cmd_items - 1; i > 0; --i) {
41 for (j = 0; j < i; ++j) {
42 if (strcmp(cmd_array[j]->name,
43 cmd_array[j + 1]->name) > 0) {
46 cmd_array[j] = cmd_array[j + 1];
47 cmd_array[j + 1] = tmp;
55 /* print short help (usage) */
56 for (i = 0; i < cmd_items; i++) {
57 const char *usage = cmd_array[i]->usage;
59 /* allow user abort */
64 printf("%-*s- %s\n", CONFIG_SYS_HELP_CMD_WIDTH,
65 cmd_array[i]->name, usage);
70 * command help (long version)
72 for (i = 1; i < argc; ++i) {
73 cmdtp = find_cmd_tbl(argv[i], cmd_start, cmd_items);
75 rcode |= cmd_usage(cmdtp);
77 printf("Unknown command '%s' - try 'help' without arguments for list of all known commands\n\n",
85 /* find command table entry for a command */
86 struct cmd_tbl *find_cmd_tbl(const char *cmd, struct cmd_tbl *table,
90 struct cmd_tbl *cmdtp;
91 struct cmd_tbl *cmdtp_temp = table; /* Init value */
99 * Some commands allow length modifiers (like "cp.b");
100 * compare command name only until first dot.
102 len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
104 for (cmdtp = table; cmdtp != table + table_len; cmdtp++) {
105 if (strncmp(cmd, cmdtp->name, len) == 0) {
106 if (len == strlen(cmdtp->name))
107 return cmdtp; /* full match */
109 cmdtp_temp = cmdtp; /* abbreviated command ? */
113 if (n_found == 1) { /* exactly one match */
116 #endif /* CONFIG_CMDLINE */
118 return NULL; /* not found or ambiguous command */
121 struct cmd_tbl *find_cmd(const char *cmd)
123 struct cmd_tbl *start = ll_entry_start(struct cmd_tbl, cmd);
124 const int len = ll_entry_count(struct cmd_tbl, cmd);
125 return find_cmd_tbl(cmd, start, len);
128 int cmd_usage(const struct cmd_tbl *cmdtp)
130 printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
132 #ifdef CONFIG_SYS_LONGHELP
133 printf("Usage:\n%s ", cmdtp->name);
136 puts ("- No additional help available.\n");
142 #endif /* CONFIG_SYS_LONGHELP */
146 #ifdef CONFIG_AUTO_COMPLETE
147 static char env_complete_buf[512];
149 int var_complete(int argc, char *const argv[], char last_char, int maxv,
154 space = last_char == '\0' || isblank(last_char);
156 if (space && argc == 1)
157 return env_complete("", maxv, cmdv, sizeof(env_complete_buf),
158 env_complete_buf, false);
160 if (!space && argc == 2)
161 return env_complete(argv[1], maxv, cmdv,
162 sizeof(env_complete_buf),
163 env_complete_buf, false);
168 static int dollar_complete(int argc, char *const argv[], char last_char,
169 int maxv, char *cmdv[])
171 /* Make sure the last argument starts with a $. */
172 if (argc < 1 || argv[argc - 1][0] != '$' ||
173 last_char == '\0' || isblank(last_char))
176 return env_complete(argv[argc - 1], maxv, cmdv, sizeof(env_complete_buf),
177 env_complete_buf, true);
180 /*************************************************************************************/
182 int complete_subcmdv(struct cmd_tbl *cmdtp, int count, int argc,
183 char *const argv[], char last_char,
184 int maxv, char *cmdv[])
186 #ifdef CONFIG_CMDLINE
187 const struct cmd_tbl *cmdend = cmdtp + count;
200 /* output full list of commands */
201 for (; cmdtp != cmdend; cmdtp++) {
202 if (n_found >= maxv - 2) {
203 cmdv[n_found++] = "...";
206 cmdv[n_found++] = cmdtp->name;
208 cmdv[n_found] = NULL;
212 /* more than one arg or one but the start of the next */
213 if (argc > 1 || last_char == '\0' || isblank(last_char)) {
214 cmdtp = find_cmd_tbl(argv[0], cmdtp, count);
215 if (cmdtp == NULL || cmdtp->complete == NULL) {
219 return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
224 * Some commands allow length modifiers (like "cp.b");
225 * compare command name only until first dot.
227 p = strchr(cmd, '.');
233 /* return the partial matches */
234 for (; cmdtp != cmdend; cmdtp++) {
236 clen = strlen(cmdtp->name);
240 if (memcmp(cmd, cmdtp->name, len) != 0)
244 if (n_found >= maxv - 2) {
245 cmdv[n_found++] = "...";
249 cmdv[n_found++] = cmdtp->name;
252 cmdv[n_found] = NULL;
259 static int complete_cmdv(int argc, char *const argv[], char last_char,
260 int maxv, char *cmdv[])
262 #ifdef CONFIG_CMDLINE
263 return complete_subcmdv(ll_entry_start(struct cmd_tbl, cmd),
264 ll_entry_count(struct cmd_tbl, cmd), argc, argv,
265 last_char, maxv, cmdv);
271 static int make_argv(char *s, int argvsz, char *argv[])
275 /* split into argv */
276 while (argc < argvsz - 1) {
278 /* skip any white space */
282 if (*s == '\0') /* end of s, no more args */
285 argv[argc++] = s; /* begin of argument string */
287 /* find end of string */
288 while (*s && !isblank(*s))
291 if (*s == '\0') /* end of s, no more args */
294 *s++ = '\0'; /* terminate current arg */
301 static void print_argv(const char *banner, const char *leader, const char *sep,
302 int linemax, char *const argv[])
304 int ll = leader != NULL ? strlen(leader) : 0;
305 int sl = sep != NULL ? strlen(sep) : 0;
313 i = linemax; /* force leader and newline */
314 while (*argv != NULL) {
315 len = strlen(*argv) + sl;
316 if (i + len >= linemax) {
329 static int find_common_prefix(char *const argv[])
332 char *anchor, *s, *t;
339 len = strlen(anchor);
340 while ((t = *argv++) != NULL) {
342 for (i = 0; i < len; i++, t++, s++) {
351 static char tmp_buf[CONFIG_SYS_CBSIZE + 1]; /* copy of console I/O buffer */
353 int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp)
355 int n = *np, col = *colp;
356 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
360 int i, j, k, len, seplen, argc;
363 #ifdef CONFIG_CMDLINE_PS_SUPPORT
364 const char *ps_prompt = env_get("PS1");
366 const char *ps_prompt = CONFIG_SYS_PROMPT;
369 if (strcmp(prompt, ps_prompt) != 0)
370 return 0; /* not in normal console */
374 last_char = buf[cnt - 1];
378 /* copy to secondary buffer which will be affected */
379 strcpy(tmp_buf, buf);
381 /* separate into argv */
382 argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
384 /* first try a $ completion */
385 i = dollar_complete(argc, argv, last_char,
386 sizeof(cmdv) / sizeof(cmdv[0]), cmdv);
388 /* do the completion and return the possible completions */
389 i = complete_cmdv(argc, argv, last_char,
390 sizeof(cmdv) / sizeof(cmdv[0]), cmdv);
393 /* no match; bell and out */
395 if (argc > 1) /* allow tab for non command */
405 if (i == 1) { /* one match; perfect */
406 if (last_char != '\0' && !isblank(last_char))
407 k = strlen(argv[argc - 1]);
415 } else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
416 if (last_char != '\0' && !isblank(last_char))
417 k = strlen(argv[argc - 1]);
430 /* make sure it fits */
431 if (n + k >= CONFIG_SYS_CBSIZE - 2) {
437 for (i = 0; i < len; i++)
440 for (i = 0; i < seplen; i++)
451 print_argv(NULL, " ", " ", 78, cmdv);
462 int cmd_get_data_size(char* arg, int default_size)
464 /* Check for a size specification .b, .w or .l.
466 int len = strlen(arg);
467 if (len > 2 && arg[len-2] == '.') {
468 switch (arg[len-1]) {
475 #ifdef MEM_SUPPORT_64BIT_DATA
489 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
490 DECLARE_GLOBAL_DATA_PTR;
492 void fixup_cmdtable(struct cmd_tbl *cmdtp, int size)
496 if (gd->reloc_off == 0)
499 for (i = 0; i < size; i++) {
502 addr = (ulong)(cmdtp->cmd_rep) + gd->reloc_off;
504 (int (*)(struct cmd_tbl *, int, int,
505 char * const [], int *))addr;
507 addr = (ulong)(cmdtp->cmd) + gd->reloc_off;
508 #ifdef DEBUG_COMMANDS
509 printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
510 cmdtp->name, (ulong)(cmdtp->cmd), addr);
512 cmdtp->cmd = (int (*)(struct cmd_tbl *, int, int,
513 char *const []))addr;
514 addr = (ulong)(cmdtp->name) + gd->reloc_off;
515 cmdtp->name = (char *)addr;
517 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
518 cmdtp->usage = (char *)addr;
520 #ifdef CONFIG_SYS_LONGHELP
522 addr = (ulong)(cmdtp->help) + gd->reloc_off;
523 cmdtp->help = (char *)addr;
526 #ifdef CONFIG_AUTO_COMPLETE
527 if (cmdtp->complete) {
528 addr = (ulong)(cmdtp->complete) + gd->reloc_off;
530 (int (*)(int, char * const [], char, int, char * []))addr;
538 int cmd_always_repeatable(struct cmd_tbl *cmdtp, int flag, int argc,
539 char *const argv[], int *repeatable)
543 return cmdtp->cmd(cmdtp, flag, argc, argv);
546 int cmd_never_repeatable(struct cmd_tbl *cmdtp, int flag, int argc,
547 char *const argv[], int *repeatable)
551 return cmdtp->cmd(cmdtp, flag, argc, argv);
554 int cmd_discard_repeatable(struct cmd_tbl *cmdtp, int flag, int argc,
559 return cmdtp->cmd_rep(cmdtp, flag, argc, argv, &repeatable);
563 * Call a command function. This should be the only route in U-Boot to call
564 * a command, so that we can track whether we are waiting for input or
565 * executing a command.
567 * @param cmdtp Pointer to the command to execute
568 * @param flag Some flags normally 0 (see CMD_FLAG_.. above)
569 * @param argc Number of arguments (arg 0 must be the command text)
570 * @param argv Arguments
571 * @param repeatable Can the command be repeated
572 * @return 0 if command succeeded, else non-zero (CMD_RET_...)
574 static int cmd_call(struct cmd_tbl *cmdtp, int flag, int argc,
575 char *const argv[], int *repeatable)
579 result = cmdtp->cmd_rep(cmdtp, flag, argc, argv, repeatable);
581 debug("Command failed, result=%d\n", result);
585 enum command_ret_t cmd_process(int flag, int argc, char *const argv[],
586 int *repeatable, ulong *ticks)
588 enum command_ret_t rc = CMD_RET_SUCCESS;
589 struct cmd_tbl *cmdtp;
591 #if defined(CONFIG_SYS_XTRACE)
594 xtrace = env_get("xtrace");
597 for (int i = 0; i < argc; i++) {
605 /* Look up command in command table */
606 cmdtp = find_cmd(argv[0]);
608 printf("Unknown command '%s' - try 'help'\n", argv[0]);
612 /* found - check max args */
613 if (argc > cmdtp->maxargs)
616 #if defined(CONFIG_CMD_BOOTD)
617 /* avoid "bootd" recursion */
618 else if (cmdtp->cmd == do_bootd) {
619 if (flag & CMD_FLAG_BOOTD) {
620 puts("'bootd' recursion detected\n");
621 rc = CMD_RET_FAILURE;
623 flag |= CMD_FLAG_BOOTD;
628 /* If OK so far, then do the command */
633 *ticks = get_timer(0);
634 rc = cmd_call(cmdtp, flag, argc, argv, &newrep);
636 *ticks = get_timer(*ticks);
637 *repeatable &= newrep;
639 if (rc == CMD_RET_USAGE)
640 rc = cmd_usage(cmdtp);
644 int cmd_process_error(struct cmd_tbl *cmdtp, int err)
646 if (err == CMD_RET_USAGE)
647 return CMD_RET_USAGE;
650 printf("Command '%s' failed: Error %d\n", cmdtp->name, err);
651 return CMD_RET_FAILURE;
654 return CMD_RET_SUCCESS;