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
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)
88 cmd_tbl_t *cmdtp_temp = table; /* Init value */
96 * Some commands allow length modifiers (like "cp.b");
97 * compare command name only until first dot.
99 len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
101 for (cmdtp = table; cmdtp != table + table_len; cmdtp++) {
102 if (strncmp(cmd, cmdtp->name, len) == 0) {
103 if (len == strlen(cmdtp->name))
104 return cmdtp; /* full match */
106 cmdtp_temp = cmdtp; /* abbreviated command ? */
110 if (n_found == 1) { /* exactly one match */
114 return NULL; /* not found or ambiguous command */
117 cmd_tbl_t *find_cmd(const char *cmd)
119 cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
120 const int len = ll_entry_count(cmd_tbl_t, cmd);
121 return find_cmd_tbl(cmd, start, len);
124 int cmd_usage(const cmd_tbl_t *cmdtp)
126 printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
128 #ifdef CONFIG_SYS_LONGHELP
129 printf("Usage:\n%s ", cmdtp->name);
132 puts ("- No additional help available.\n");
138 #endif /* CONFIG_SYS_LONGHELP */
142 #ifdef CONFIG_AUTO_COMPLETE
144 int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
146 static char tmp_buf[512];
149 space = last_char == '\0' || isblank(last_char);
151 if (space && argc == 1)
152 return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
154 if (!space && argc == 2)
155 return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
160 /*************************************************************************************/
162 static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
164 cmd_tbl_t *cmdtp = ll_entry_start(cmd_tbl_t, cmd);
165 const int count = ll_entry_count(cmd_tbl_t, cmd);
166 const cmd_tbl_t *cmdend = cmdtp + count;
179 /* output full list of commands */
180 for (; cmdtp != cmdend; cmdtp++) {
181 if (n_found >= maxv - 2) {
182 cmdv[n_found++] = "...";
185 cmdv[n_found++] = cmdtp->name;
187 cmdv[n_found] = NULL;
191 /* more than one arg or one but the start of the next */
192 if (argc > 1 || last_char == '\0' || isblank(last_char)) {
193 cmdtp = find_cmd(argv[0]);
194 if (cmdtp == NULL || cmdtp->complete == NULL) {
198 return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
203 * Some commands allow length modifiers (like "cp.b");
204 * compare command name only until first dot.
206 p = strchr(cmd, '.');
212 /* return the partial matches */
213 for (; cmdtp != cmdend; cmdtp++) {
215 clen = strlen(cmdtp->name);
219 if (memcmp(cmd, cmdtp->name, len) != 0)
223 if (n_found >= maxv - 2) {
224 cmdv[n_found++] = "...";
228 cmdv[n_found++] = cmdtp->name;
231 cmdv[n_found] = NULL;
235 static int make_argv(char *s, int argvsz, char *argv[])
239 /* split into argv */
240 while (argc < argvsz - 1) {
242 /* skip any white space */
246 if (*s == '\0') /* end of s, no more args */
249 argv[argc++] = s; /* begin of argument string */
251 /* find end of string */
252 while (*s && !isblank(*s))
255 if (*s == '\0') /* end of s, no more args */
258 *s++ = '\0'; /* terminate current arg */
265 static void print_argv(const char *banner, const char *leader, const char *sep, int linemax, char * const argv[])
267 int ll = leader != NULL ? strlen(leader) : 0;
268 int sl = sep != NULL ? strlen(sep) : 0;
276 i = linemax; /* force leader and newline */
277 while (*argv != NULL) {
278 len = strlen(*argv) + sl;
279 if (i + len >= linemax) {
292 static int find_common_prefix(char * const argv[])
295 char *anchor, *s, *t;
302 len = strlen(anchor);
303 while ((t = *argv++) != NULL) {
305 for (i = 0; i < len; i++, t++, s++) {
314 static char tmp_buf[CONFIG_SYS_CBSIZE]; /* copy of console I/O buffer */
316 int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp)
318 int n = *np, col = *colp;
319 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
323 int i, j, k, len, seplen, argc;
327 if (strcmp(prompt, CONFIG_SYS_PROMPT) != 0)
328 return 0; /* not in normal console */
332 last_char = buf[cnt - 1];
336 /* copy to secondary buffer which will be affected */
337 strcpy(tmp_buf, buf);
339 /* separate into argv */
340 argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
342 /* do the completion and return the possible completions */
343 i = complete_cmdv(argc, argv, last_char,
344 sizeof(cmdv) / sizeof(cmdv[0]), cmdv);
346 /* no match; bell and out */
348 if (argc > 1) /* allow tab for non command */
358 if (i == 1) { /* one match; perfect */
359 k = strlen(argv[argc - 1]);
364 } else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
365 k = strlen(argv[argc - 1]);
375 /* make sure it fits */
376 if (n + k >= CONFIG_SYS_CBSIZE - 2) {
382 for (i = 0; i < len; i++)
385 for (i = 0; i < seplen; i++)
396 print_argv(NULL, " ", " ", 78, cmdv);
407 int cmd_get_data_size(char* arg, int default_size)
409 /* Check for a size specification .b, .w or .l.
411 int len = strlen(arg);
412 if (len > 2 && arg[len-2] == '.') {
413 switch (arg[len-1]) {
420 #ifdef CONFIG_SYS_SUPPORT_64BIT_DATA
434 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
435 DECLARE_GLOBAL_DATA_PTR;
437 void fixup_cmdtable(cmd_tbl_t *cmdtp, int size)
441 if (gd->reloc_off == 0)
444 for (i = 0; i < size; i++) {
447 addr = (ulong)(cmdtp->cmd) + gd->reloc_off;
449 printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
450 cmdtp->name, (ulong)(cmdtp->cmd), addr);
453 (int (*)(struct cmd_tbl_s *, int, int, char * const []))addr;
454 addr = (ulong)(cmdtp->name) + gd->reloc_off;
455 cmdtp->name = (char *)addr;
457 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
458 cmdtp->usage = (char *)addr;
460 #ifdef CONFIG_SYS_LONGHELP
462 addr = (ulong)(cmdtp->help) + gd->reloc_off;
463 cmdtp->help = (char *)addr;
466 #ifdef CONFIG_AUTO_COMPLETE
467 if (cmdtp->complete) {
468 addr = (ulong)(cmdtp->complete) + gd->reloc_off;
470 (int (*)(int, char * const [], char, int, char * []))addr;
479 * Call a command function. This should be the only route in U-Boot to call
480 * a command, so that we can track whether we are waiting for input or
481 * executing a command.
483 * @param cmdtp Pointer to the command to execute
484 * @param flag Some flags normally 0 (see CMD_FLAG_.. above)
485 * @param argc Number of arguments (arg 0 must be the command text)
486 * @param argv Arguments
487 * @return 0 if command succeeded, else non-zero (CMD_RET_...)
489 static int cmd_call(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
493 result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
495 debug("Command failed, result=%d", result);
499 enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
500 int *repeatable, ulong *ticks)
502 enum command_ret_t rc = CMD_RET_SUCCESS;
505 /* Look up command in command table */
506 cmdtp = find_cmd(argv[0]);
508 printf("Unknown command '%s' - try 'help'\n", argv[0]);
512 /* found - check max args */
513 if (argc > cmdtp->maxargs)
516 #if defined(CONFIG_CMD_BOOTD)
517 /* avoid "bootd" recursion */
518 else if (cmdtp->cmd == do_bootd) {
519 if (flag & CMD_FLAG_BOOTD) {
520 puts("'bootd' recursion detected\n");
521 rc = CMD_RET_FAILURE;
523 flag |= CMD_FLAG_BOOTD;
528 /* If OK so far, then do the command */
531 *ticks = get_timer(0);
532 rc = cmd_call(cmdtp, flag, argc, argv);
534 *ticks = get_timer(*ticks);
535 *repeatable &= cmdtp->repeatable;
537 if (rc == CMD_RET_USAGE)
538 rc = cmd_usage(cmdtp);
542 int cmd_process_error(cmd_tbl_t *cmdtp, int err)
545 printf("Command '%s' failed: Error %d\n", cmdtp->name, err);