2 * (C) Copyright 2000-2009
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
9 * 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(cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t *cmdtp, int flag,
23 int argc, char * const argv[])
28 if (argc == 1) { /* show list of commands */
29 cmd_tbl_t *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 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 */
115 return NULL; /* not found or ambiguous command */
118 cmd_tbl_t *find_cmd(const char *cmd)
120 cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
121 const int len = ll_entry_count(cmd_tbl_t, cmd);
122 return find_cmd_tbl(cmd, start, len);
125 int cmd_usage(const cmd_tbl_t *cmdtp)
127 printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
129 #ifdef CONFIG_SYS_LONGHELP
130 printf("Usage:\n%s ", cmdtp->name);
133 puts ("- No additional help available.\n");
139 #endif /* CONFIG_SYS_LONGHELP */
143 #ifdef CONFIG_AUTO_COMPLETE
145 int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
147 static char tmp_buf[512];
150 space = last_char == '\0' || isblank(last_char);
152 if (space && argc == 1)
153 return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
155 if (!space && argc == 2)
156 return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
161 /*************************************************************************************/
163 static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
165 cmd_tbl_t *cmdtp = ll_entry_start(cmd_tbl_t, cmd);
166 const int count = ll_entry_count(cmd_tbl_t, cmd);
167 const cmd_tbl_t *cmdend = cmdtp + count;
180 /* output full list of commands */
181 for (; cmdtp != cmdend; cmdtp++) {
182 if (n_found >= maxv - 2) {
183 cmdv[n_found++] = "...";
186 cmdv[n_found++] = cmdtp->name;
188 cmdv[n_found] = NULL;
192 /* more than one arg or one but the start of the next */
193 if (argc > 1 || last_char == '\0' || isblank(last_char)) {
194 cmdtp = find_cmd(argv[0]);
195 if (cmdtp == NULL || cmdtp->complete == NULL) {
199 return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
204 * Some commands allow length modifiers (like "cp.b");
205 * compare command name only until first dot.
207 p = strchr(cmd, '.');
213 /* return the partial matches */
214 for (; cmdtp != cmdend; cmdtp++) {
216 clen = strlen(cmdtp->name);
220 if (memcmp(cmd, cmdtp->name, len) != 0)
224 if (n_found >= maxv - 2) {
225 cmdv[n_found++] = "...";
229 cmdv[n_found++] = cmdtp->name;
232 cmdv[n_found] = NULL;
236 static int make_argv(char *s, int argvsz, char *argv[])
240 /* split into argv */
241 while (argc < argvsz - 1) {
243 /* skip any white space */
247 if (*s == '\0') /* end of s, no more args */
250 argv[argc++] = s; /* begin of argument string */
252 /* find end of string */
253 while (*s && !isblank(*s))
256 if (*s == '\0') /* end of s, no more args */
259 *s++ = '\0'; /* terminate current arg */
266 static void print_argv(const char *banner, const char *leader, const char *sep, int linemax, char * const argv[])
268 int ll = leader != NULL ? strlen(leader) : 0;
269 int sl = sep != NULL ? strlen(sep) : 0;
277 i = linemax; /* force leader and newline */
278 while (*argv != NULL) {
279 len = strlen(*argv) + sl;
280 if (i + len >= linemax) {
293 static int find_common_prefix(char * const argv[])
296 char *anchor, *s, *t;
303 len = strlen(anchor);
304 while ((t = *argv++) != NULL) {
306 for (i = 0; i < len; i++, t++, s++) {
315 static char tmp_buf[CONFIG_SYS_CBSIZE]; /* copy of console I/O buffer */
317 int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp)
319 int n = *np, col = *colp;
320 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
324 int i, j, k, len, seplen, argc;
328 if (strcmp(prompt, CONFIG_SYS_PROMPT) != 0)
329 return 0; /* not in normal console */
333 last_char = buf[cnt - 1];
337 /* copy to secondary buffer which will be affected */
338 strcpy(tmp_buf, buf);
340 /* separate into argv */
341 argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
343 /* do the completion and return the possible completions */
344 i = complete_cmdv(argc, argv, last_char,
345 sizeof(cmdv) / sizeof(cmdv[0]), cmdv);
347 /* no match; bell and out */
349 if (argc > 1) /* allow tab for non command */
359 if (i == 1) { /* one match; perfect */
360 k = strlen(argv[argc - 1]);
365 } else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
366 k = strlen(argv[argc - 1]);
376 /* make sure it fits */
377 if (n + k >= CONFIG_SYS_CBSIZE - 2) {
383 for (i = 0; i < len; i++)
386 for (i = 0; i < seplen; i++)
397 print_argv(NULL, " ", " ", 78, cmdv);
408 int cmd_get_data_size(char* arg, int default_size)
410 /* Check for a size specification .b, .w or .l.
412 int len = strlen(arg);
413 if (len > 2 && arg[len-2] == '.') {
414 switch (arg[len-1]) {
421 #ifdef CONFIG_SYS_SUPPORT_64BIT_DATA
435 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
436 DECLARE_GLOBAL_DATA_PTR;
438 void fixup_cmdtable(cmd_tbl_t *cmdtp, int size)
442 if (gd->reloc_off == 0)
445 for (i = 0; i < size; i++) {
448 addr = (ulong)(cmdtp->cmd) + gd->reloc_off;
449 #ifdef DEBUG_COMMANDS
450 printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
451 cmdtp->name, (ulong)(cmdtp->cmd), addr);
454 (int (*)(struct cmd_tbl_s *, int, int, char * const []))addr;
455 addr = (ulong)(cmdtp->name) + gd->reloc_off;
456 cmdtp->name = (char *)addr;
458 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
459 cmdtp->usage = (char *)addr;
461 #ifdef CONFIG_SYS_LONGHELP
463 addr = (ulong)(cmdtp->help) + gd->reloc_off;
464 cmdtp->help = (char *)addr;
467 #ifdef CONFIG_AUTO_COMPLETE
468 if (cmdtp->complete) {
469 addr = (ulong)(cmdtp->complete) + gd->reloc_off;
471 (int (*)(int, char * const [], char, int, char * []))addr;
480 * Call a command function. This should be the only route in U-Boot to call
481 * a command, so that we can track whether we are waiting for input or
482 * executing a command.
484 * @param cmdtp Pointer to the command to execute
485 * @param flag Some flags normally 0 (see CMD_FLAG_.. above)
486 * @param argc Number of arguments (arg 0 must be the command text)
487 * @param argv Arguments
488 * @return 0 if command succeeded, else non-zero (CMD_RET_...)
490 static int cmd_call(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
494 result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
496 debug("Command failed, result=%d\n", result);
500 enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
501 int *repeatable, ulong *ticks)
503 enum command_ret_t rc = CMD_RET_SUCCESS;
506 /* Look up command in command table */
507 cmdtp = find_cmd(argv[0]);
509 printf("Unknown command '%s' - try 'help'\n", argv[0]);
513 /* found - check max args */
514 if (argc > cmdtp->maxargs)
517 #if defined(CONFIG_CMD_BOOTD)
518 /* avoid "bootd" recursion */
519 else if (cmdtp->cmd == do_bootd) {
520 if (flag & CMD_FLAG_BOOTD) {
521 puts("'bootd' recursion detected\n");
522 rc = CMD_RET_FAILURE;
524 flag |= CMD_FLAG_BOOTD;
529 /* If OK so far, then do the command */
532 *ticks = get_timer(0);
533 rc = cmd_call(cmdtp, flag, argc, argv);
535 *ticks = get_timer(*ticks);
536 *repeatable &= cmdtp->repeatable;
538 if (rc == CMD_RET_USAGE)
539 rc = cmd_usage(cmdtp);
543 int cmd_process_error(cmd_tbl_t *cmdtp, int err)
546 printf("Command '%s' failed: Error %d\n", cmdtp->name, err);