1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2000-2009
8 * Command Processor Table
20 #include <asm/global_data.h>
21 #include <linux/ctype.h>
23 DECLARE_GLOBAL_DATA_PTR;
26 * Use puts() instead of printf() to avoid printf buffer overflow
27 * for long help messages
30 int _do_help(struct cmd_tbl *cmd_start, int cmd_items, struct cmd_tbl *cmdtp,
31 int flag, int argc, char *const argv[])
36 if (argc == 1) { /* show list of commands */
37 struct cmd_tbl *cmd_array[cmd_items];
40 /* Make array of commands from .uboot_cmd section */
42 for (i = 0; i < cmd_items; i++) {
43 cmd_array[i] = cmdtp++;
46 /* Sort command list (trivial bubble sort) */
47 for (i = cmd_items - 1; i > 0; --i) {
49 for (j = 0; j < i; ++j) {
50 if (strcmp(cmd_array[j]->name,
51 cmd_array[j + 1]->name) > 0) {
54 cmd_array[j] = cmd_array[j + 1];
55 cmd_array[j + 1] = tmp;
63 /* print short help (usage) */
64 for (i = 0; i < cmd_items; i++) {
65 const char *usage = cmd_array[i]->usage;
67 /* allow user abort */
72 printf("%-*s- %s\n", CFG_SYS_HELP_CMD_WIDTH,
73 cmd_array[i]->name, usage);
78 * command help (long version)
80 for (i = 1; i < argc; ++i) {
81 cmdtp = find_cmd_tbl(argv[i], cmd_start, cmd_items);
83 rcode |= cmd_usage(cmdtp);
85 printf("Unknown command '%s' - try 'help' without arguments for list of all known commands\n\n",
93 /* find command table entry for a command */
94 struct cmd_tbl *find_cmd_tbl(const char *cmd, struct cmd_tbl *table,
98 struct cmd_tbl *cmdtp;
99 struct cmd_tbl *cmdtp_temp = table; /* Init value */
107 * Some commands allow length modifiers (like "cp.b");
108 * compare command name only until first dot.
110 len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
112 for (cmdtp = table; cmdtp != table + table_len; cmdtp++) {
113 if (strncmp(cmd, cmdtp->name, len) == 0) {
114 if (len == strlen(cmdtp->name))
115 return cmdtp; /* full match */
117 cmdtp_temp = cmdtp; /* abbreviated command ? */
121 if (n_found == 1) { /* exactly one match */
124 #endif /* CONFIG_CMDLINE */
126 return NULL; /* not found or ambiguous command */
129 struct cmd_tbl *find_cmd(const char *cmd)
131 struct cmd_tbl *start = ll_entry_start(struct cmd_tbl, cmd);
132 const int len = ll_entry_count(struct cmd_tbl, cmd);
133 return find_cmd_tbl(cmd, start, len);
136 int cmd_usage(const struct cmd_tbl *cmdtp)
138 printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
140 #ifdef CONFIG_SYS_LONGHELP
141 printf("Usage:\n%s ", cmdtp->name);
144 puts ("- No additional help available.\n");
150 #endif /* CONFIG_SYS_LONGHELP */
154 #ifdef CONFIG_AUTO_COMPLETE
155 static char env_complete_buf[512];
157 int var_complete(int argc, char *const argv[], char last_char, int maxv,
162 space = last_char == '\0' || isblank(last_char);
164 if (space && argc == 1)
165 return env_complete("", maxv, cmdv, sizeof(env_complete_buf),
166 env_complete_buf, false);
168 if (!space && argc == 2)
169 return env_complete(argv[1], maxv, cmdv,
170 sizeof(env_complete_buf),
171 env_complete_buf, false);
176 static int dollar_complete(int argc, char *const argv[], char last_char,
177 int maxv, char *cmdv[])
179 /* Make sure the last argument starts with a $. */
180 if (argc < 1 || argv[argc - 1][0] != '$' ||
181 last_char == '\0' || isblank(last_char))
184 return env_complete(argv[argc - 1], maxv, cmdv, sizeof(env_complete_buf),
185 env_complete_buf, true);
188 /*************************************************************************************/
190 int complete_subcmdv(struct cmd_tbl *cmdtp, int count, int argc,
191 char *const argv[], char last_char,
192 int maxv, char *cmdv[])
194 #ifdef CONFIG_CMDLINE
195 const struct cmd_tbl *cmdend = cmdtp + count;
208 /* output full list of commands */
209 for (; cmdtp != cmdend; cmdtp++) {
210 if (n_found >= maxv - 2) {
211 cmdv[n_found++] = "...";
214 cmdv[n_found++] = cmdtp->name;
216 cmdv[n_found] = NULL;
220 /* more than one arg or one but the start of the next */
221 if (argc > 1 || last_char == '\0' || isblank(last_char)) {
222 cmdtp = find_cmd_tbl(argv[0], cmdtp, count);
223 if (cmdtp == NULL || cmdtp->complete == NULL) {
227 return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
232 * Some commands allow length modifiers (like "cp.b");
233 * compare command name only until first dot.
235 p = strchr(cmd, '.');
241 /* return the partial matches */
242 for (; cmdtp != cmdend; cmdtp++) {
244 clen = strlen(cmdtp->name);
248 if (memcmp(cmd, cmdtp->name, len) != 0)
252 if (n_found >= maxv - 2) {
253 cmdv[n_found++] = "...";
257 cmdv[n_found++] = cmdtp->name;
260 cmdv[n_found] = NULL;
267 static int complete_cmdv(int argc, char *const argv[], char last_char,
268 int maxv, char *cmdv[])
270 #ifdef CONFIG_CMDLINE
271 return complete_subcmdv(ll_entry_start(struct cmd_tbl, cmd),
272 ll_entry_count(struct cmd_tbl, cmd), argc, argv,
273 last_char, maxv, cmdv);
279 static int make_argv(char *s, int argvsz, char *argv[])
283 /* split into argv */
284 while (argc < argvsz - 1) {
286 /* skip any white space */
290 if (*s == '\0') /* end of s, no more args */
293 argv[argc++] = s; /* begin of argument string */
295 /* find end of string */
296 while (*s && !isblank(*s))
299 if (*s == '\0') /* end of s, no more args */
302 *s++ = '\0'; /* terminate current arg */
309 static void print_argv(const char *banner, const char *leader, const char *sep,
310 int linemax, char *const argv[])
312 int ll = leader != NULL ? strlen(leader) : 0;
313 int sl = sep != NULL ? strlen(sep) : 0;
321 i = linemax; /* force leader and newline */
322 while (*argv != NULL) {
323 len = strlen(*argv) + sl;
324 if (i + len >= linemax) {
337 static int find_common_prefix(char *const argv[])
340 char *anchor, *s, *t;
347 len = strlen(anchor);
348 while ((t = *argv++) != NULL) {
350 for (i = 0; i < len; i++, t++, s++) {
359 int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp)
361 char tmp_buf[CONFIG_SYS_CBSIZE + 1]; /* copy of console I/O buffer */
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(const 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);