1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2000-2009
8 * Command Processor Table
19 #include <asm/global_data.h>
20 #include <linux/ctype.h>
22 DECLARE_GLOBAL_DATA_PTR;
25 * Use puts() instead of printf() to avoid printf buffer overflow
26 * for long help messages
29 int _do_help(struct cmd_tbl *cmd_start, int cmd_items, struct cmd_tbl *cmdtp,
30 int flag, int argc, char *const argv[])
35 if (argc == 1) { /* show list of commands */
36 struct cmd_tbl *cmd_array[cmd_items];
39 /* Make array of commands from .uboot_cmd section */
41 for (i = 0; i < cmd_items; i++) {
42 cmd_array[i] = cmdtp++;
45 /* Sort command list (trivial bubble sort) */
46 for (i = cmd_items - 1; i > 0; --i) {
48 for (j = 0; j < i; ++j) {
49 if (strcmp(cmd_array[j]->name,
50 cmd_array[j + 1]->name) > 0) {
53 cmd_array[j] = cmd_array[j + 1];
54 cmd_array[j + 1] = tmp;
62 /* print short help (usage) */
63 for (i = 0; i < cmd_items; i++) {
64 const char *usage = cmd_array[i]->usage;
66 /* allow user abort */
71 printf("%-*s- %s\n", CFG_SYS_HELP_CMD_WIDTH,
72 cmd_array[i]->name, usage);
77 * command help (long version)
79 for (i = 1; i < argc; ++i) {
80 cmdtp = find_cmd_tbl(argv[i], cmd_start, cmd_items);
82 rcode |= cmd_usage(cmdtp);
84 printf("Unknown command '%s' - try 'help' without arguments for list of all known commands\n\n",
92 /* find command table entry for a command */
93 struct cmd_tbl *find_cmd_tbl(const char *cmd, struct cmd_tbl *table,
97 struct cmd_tbl *cmdtp;
98 struct cmd_tbl *cmdtp_temp = table; /* Init value */
106 * Some commands allow length modifiers (like "cp.b");
107 * compare command name only until first dot.
109 len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
111 for (cmdtp = table; cmdtp != table + table_len; cmdtp++) {
112 if (strncmp(cmd, cmdtp->name, len) == 0) {
113 if (len == strlen(cmdtp->name))
114 return cmdtp; /* full match */
116 cmdtp_temp = cmdtp; /* abbreviated command ? */
120 if (n_found == 1) { /* exactly one match */
123 #endif /* CONFIG_CMDLINE */
125 return NULL; /* not found or ambiguous command */
128 struct cmd_tbl *find_cmd(const char *cmd)
130 struct cmd_tbl *start = ll_entry_start(struct cmd_tbl, cmd);
131 const int len = ll_entry_count(struct cmd_tbl, cmd);
132 return find_cmd_tbl(cmd, start, len);
135 int cmd_usage(const struct cmd_tbl *cmdtp)
137 printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
139 #ifdef CONFIG_SYS_LONGHELP
140 printf("Usage:\n%s ", cmdtp->name);
143 puts ("- No additional help available.\n");
149 #endif /* CONFIG_SYS_LONGHELP */
153 #ifdef CONFIG_AUTO_COMPLETE
154 static char env_complete_buf[512];
156 int var_complete(int argc, char *const argv[], char last_char, int maxv,
161 space = last_char == '\0' || isblank(last_char);
163 if (space && argc == 1)
164 return env_complete("", maxv, cmdv, sizeof(env_complete_buf),
165 env_complete_buf, false);
167 if (!space && argc == 2)
168 return env_complete(argv[1], maxv, cmdv,
169 sizeof(env_complete_buf),
170 env_complete_buf, false);
175 static int dollar_complete(int argc, char *const argv[], char last_char,
176 int maxv, char *cmdv[])
178 /* Make sure the last argument starts with a $. */
179 if (argc < 1 || argv[argc - 1][0] != '$' ||
180 last_char == '\0' || isblank(last_char))
183 return env_complete(argv[argc - 1], maxv, cmdv, sizeof(env_complete_buf),
184 env_complete_buf, true);
187 /*************************************************************************************/
189 int complete_subcmdv(struct cmd_tbl *cmdtp, int count, int argc,
190 char *const argv[], char last_char,
191 int maxv, char *cmdv[])
193 #ifdef CONFIG_CMDLINE
194 const struct cmd_tbl *cmdend = cmdtp + count;
207 /* output full list of commands */
208 for (; cmdtp != cmdend; cmdtp++) {
209 if (n_found >= maxv - 2) {
210 cmdv[n_found++] = "...";
213 cmdv[n_found++] = cmdtp->name;
215 cmdv[n_found] = NULL;
219 /* more than one arg or one but the start of the next */
220 if (argc > 1 || last_char == '\0' || isblank(last_char)) {
221 cmdtp = find_cmd_tbl(argv[0], cmdtp, count);
222 if (cmdtp == NULL || cmdtp->complete == NULL) {
226 return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
231 * Some commands allow length modifiers (like "cp.b");
232 * compare command name only until first dot.
234 p = strchr(cmd, '.');
240 /* return the partial matches */
241 for (; cmdtp != cmdend; cmdtp++) {
243 clen = strlen(cmdtp->name);
247 if (memcmp(cmd, cmdtp->name, len) != 0)
251 if (n_found >= maxv - 2) {
252 cmdv[n_found++] = "...";
256 cmdv[n_found++] = cmdtp->name;
259 cmdv[n_found] = NULL;
266 static int complete_cmdv(int argc, char *const argv[], char last_char,
267 int maxv, char *cmdv[])
269 #ifdef CONFIG_CMDLINE
270 return complete_subcmdv(ll_entry_start(struct cmd_tbl, cmd),
271 ll_entry_count(struct cmd_tbl, cmd), argc, argv,
272 last_char, maxv, cmdv);
278 static int make_argv(char *s, int argvsz, char *argv[])
282 /* split into argv */
283 while (argc < argvsz - 1) {
285 /* skip any white space */
289 if (*s == '\0') /* end of s, no more args */
292 argv[argc++] = s; /* begin of argument string */
294 /* find end of string */
295 while (*s && !isblank(*s))
298 if (*s == '\0') /* end of s, no more args */
301 *s++ = '\0'; /* terminate current arg */
308 static void print_argv(const char *banner, const char *leader, const char *sep,
309 int linemax, char *const argv[])
311 int ll = leader != NULL ? strlen(leader) : 0;
312 int sl = sep != NULL ? strlen(sep) : 0;
320 i = linemax; /* force leader and newline */
321 while (*argv != NULL) {
322 len = strlen(*argv) + sl;
323 if (i + len >= linemax) {
336 static int find_common_prefix(char *const argv[])
339 char *anchor, *s, *t;
346 len = strlen(anchor);
347 while ((t = *argv++) != NULL) {
349 for (i = 0; i < len; i++, t++, s++) {
358 static char tmp_buf[CONFIG_SYS_CBSIZE + 1]; /* copy of console I/O buffer */
360 int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp)
362 int n = *np, col = *colp;
363 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
367 int i, j, k, len, seplen, argc;
370 #ifdef CONFIG_CMDLINE_PS_SUPPORT
371 const char *ps_prompt = env_get("PS1");
373 const char *ps_prompt = CONFIG_SYS_PROMPT;
376 if (strcmp(prompt, ps_prompt) != 0)
377 return 0; /* not in normal console */
381 last_char = buf[cnt - 1];
385 /* copy to secondary buffer which will be affected */
386 strcpy(tmp_buf, buf);
388 /* separate into argv */
389 argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
391 /* first try a $ completion */
392 i = dollar_complete(argc, argv, last_char,
393 sizeof(cmdv) / sizeof(cmdv[0]), cmdv);
395 /* do the completion and return the possible completions */
396 i = complete_cmdv(argc, argv, last_char,
397 sizeof(cmdv) / sizeof(cmdv[0]), cmdv);
400 /* no match; bell and out */
402 if (argc > 1) /* allow tab for non command */
412 if (i == 1) { /* one match; perfect */
413 if (last_char != '\0' && !isblank(last_char))
414 k = strlen(argv[argc - 1]);
422 } else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
423 if (last_char != '\0' && !isblank(last_char))
424 k = strlen(argv[argc - 1]);
437 /* make sure it fits */
438 if (n + k >= CONFIG_SYS_CBSIZE - 2) {
444 for (i = 0; i < len; i++)
447 for (i = 0; i < seplen; i++)
458 print_argv(NULL, " ", " ", 78, cmdv);
469 int cmd_get_data_size(char* arg, int default_size)
471 /* Check for a size specification .b, .w or .l.
473 int len = strlen(arg);
474 if (len > 2 && arg[len-2] == '.') {
475 switch (arg[len-1]) {
483 return CMD_DATA_SIZE_STR;
485 if (MEM_SUPPORT_64BIT_DATA)
489 return CMD_DATA_SIZE_ERR;
496 void fixup_cmdtable(struct cmd_tbl *cmdtp, int size)
500 if (gd->reloc_off == 0)
503 for (i = 0; i < size; i++) {
506 addr = (ulong)(cmdtp->cmd_rep) + gd->reloc_off;
508 (int (*)(struct cmd_tbl *, int, int,
509 char * const [], int *))addr;
511 addr = (ulong)(cmdtp->cmd) + gd->reloc_off;
512 #ifdef DEBUG_COMMANDS
513 printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
514 cmdtp->name, (ulong)(cmdtp->cmd), addr);
516 cmdtp->cmd = (int (*)(struct cmd_tbl *, int, int,
517 char *const []))addr;
518 addr = (ulong)(cmdtp->name) + gd->reloc_off;
519 cmdtp->name = (char *)addr;
521 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
522 cmdtp->usage = (char *)addr;
524 #ifdef CONFIG_SYS_LONGHELP
526 addr = (ulong)(cmdtp->help) + gd->reloc_off;
527 cmdtp->help = (char *)addr;
530 #ifdef CONFIG_AUTO_COMPLETE
531 if (cmdtp->complete) {
532 addr = (ulong)(cmdtp->complete) + gd->reloc_off;
534 (int (*)(int, char * const [], char, int, char * []))addr;
541 int cmd_always_repeatable(struct cmd_tbl *cmdtp, int flag, int argc,
542 char *const argv[], int *repeatable)
546 return cmdtp->cmd(cmdtp, flag, argc, argv);
549 int cmd_never_repeatable(struct cmd_tbl *cmdtp, int flag, int argc,
550 char *const argv[], int *repeatable)
554 return cmdtp->cmd(cmdtp, flag, argc, argv);
557 int cmd_discard_repeatable(struct cmd_tbl *cmdtp, int flag, int argc,
562 return cmdtp->cmd_rep(cmdtp, flag, argc, argv, &repeatable);
566 * Call a command function. This should be the only route in U-Boot to call
567 * a command, so that we can track whether we are waiting for input or
568 * executing a command.
570 * @param cmdtp Pointer to the command to execute
571 * @param flag Some flags normally 0 (see CMD_FLAG_.. above)
572 * @param argc Number of arguments (arg 0 must be the command text)
573 * @param argv Arguments
574 * @param repeatable Can the command be repeated
575 * Return: 0 if command succeeded, else non-zero (CMD_RET_...)
577 static int cmd_call(struct cmd_tbl *cmdtp, int flag, int argc,
578 char *const argv[], int *repeatable)
582 result = cmdtp->cmd_rep(cmdtp, flag, argc, argv, repeatable);
584 debug("Command failed, result=%d\n", result);
588 enum command_ret_t cmd_process(int flag, int argc, char *const argv[],
589 int *repeatable, ulong *ticks)
591 enum command_ret_t rc = CMD_RET_SUCCESS;
592 struct cmd_tbl *cmdtp;
594 #if defined(CONFIG_SYS_XTRACE)
597 xtrace = env_get("xtrace");
600 for (int i = 0; i < argc; i++) {
608 /* Look up command in command table */
609 cmdtp = find_cmd(argv[0]);
611 printf("Unknown command '%s' - try 'help'\n", argv[0]);
615 /* found - check max args */
616 if (argc > cmdtp->maxargs)
619 #if defined(CONFIG_CMD_BOOTD)
620 /* avoid "bootd" recursion */
621 else if (cmdtp->cmd == do_bootd) {
622 if (flag & CMD_FLAG_BOOTD) {
623 puts("'bootd' recursion detected\n");
624 rc = CMD_RET_FAILURE;
626 flag |= CMD_FLAG_BOOTD;
631 /* If OK so far, then do the command */
636 *ticks = get_timer(0);
637 rc = cmd_call(cmdtp, flag, argc, argv, &newrep);
639 *ticks = get_timer(*ticks);
640 *repeatable &= newrep;
642 if (rc == CMD_RET_USAGE)
643 rc = cmd_usage(cmdtp);
647 int cmd_process_error(struct cmd_tbl *cmdtp, int err)
649 if (err == CMD_RET_USAGE)
650 return CMD_RET_USAGE;
653 printf("Command '%s' failed: Error %d\n", cmdtp->name, err);
654 return CMD_RET_FAILURE;
657 return CMD_RET_SUCCESS;
660 int cmd_source_script(ulong addr, const char *fit_uname, const char *confname)
667 buf = map_sysmem(addr, 0);
668 ret = image_locate_script(buf, 0, fit_uname, confname, &data, &len);
671 return CMD_RET_FAILURE;
673 debug("** Script length: %d\n", len);
674 return run_command_list(data, len, 0);