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
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)
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 */
114 #endif /* CONFIG_CMDLINE */
116 return NULL; /* not found or ambiguous command */
119 cmd_tbl_t *find_cmd(const char *cmd)
121 cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
122 const int len = ll_entry_count(cmd_tbl_t, cmd);
123 return find_cmd_tbl(cmd, start, len);
126 int cmd_usage(const cmd_tbl_t *cmdtp)
128 printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
130 #ifdef CONFIG_SYS_LONGHELP
131 printf("Usage:\n%s ", cmdtp->name);
134 puts ("- No additional help available.\n");
140 #endif /* CONFIG_SYS_LONGHELP */
144 #ifdef CONFIG_AUTO_COMPLETE
146 int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
148 static char tmp_buf[512];
151 space = last_char == '\0' || isblank(last_char);
153 if (space && argc == 1)
154 return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
156 if (!space && argc == 2)
157 return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
162 /*************************************************************************************/
164 static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
166 #ifdef CONFIG_CMDLINE
167 cmd_tbl_t *cmdtp = ll_entry_start(cmd_tbl_t, cmd);
168 const int count = ll_entry_count(cmd_tbl_t, cmd);
169 const cmd_tbl_t *cmdend = cmdtp + count;
182 /* output full list of commands */
183 for (; cmdtp != cmdend; cmdtp++) {
184 if (n_found >= maxv - 2) {
185 cmdv[n_found++] = "...";
188 cmdv[n_found++] = cmdtp->name;
190 cmdv[n_found] = NULL;
194 /* more than one arg or one but the start of the next */
195 if (argc > 1 || last_char == '\0' || isblank(last_char)) {
196 cmdtp = find_cmd(argv[0]);
197 if (cmdtp == NULL || cmdtp->complete == NULL) {
201 return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
206 * Some commands allow length modifiers (like "cp.b");
207 * compare command name only until first dot.
209 p = strchr(cmd, '.');
215 /* return the partial matches */
216 for (; cmdtp != cmdend; cmdtp++) {
218 clen = strlen(cmdtp->name);
222 if (memcmp(cmd, cmdtp->name, len) != 0)
226 if (n_found >= maxv - 2) {
227 cmdv[n_found++] = "...";
231 cmdv[n_found++] = cmdtp->name;
234 cmdv[n_found] = NULL;
241 static int make_argv(char *s, int argvsz, char *argv[])
245 /* split into argv */
246 while (argc < argvsz - 1) {
248 /* skip any white space */
252 if (*s == '\0') /* end of s, no more args */
255 argv[argc++] = s; /* begin of argument string */
257 /* find end of string */
258 while (*s && !isblank(*s))
261 if (*s == '\0') /* end of s, no more args */
264 *s++ = '\0'; /* terminate current arg */
271 static void print_argv(const char *banner, const char *leader, const char *sep, int linemax, char * const argv[])
273 int ll = leader != NULL ? strlen(leader) : 0;
274 int sl = sep != NULL ? strlen(sep) : 0;
282 i = linemax; /* force leader and newline */
283 while (*argv != NULL) {
284 len = strlen(*argv) + sl;
285 if (i + len >= linemax) {
298 static int find_common_prefix(char * const argv[])
301 char *anchor, *s, *t;
308 len = strlen(anchor);
309 while ((t = *argv++) != NULL) {
311 for (i = 0; i < len; i++, t++, s++) {
320 static char tmp_buf[CONFIG_SYS_CBSIZE + 1]; /* copy of console I/O buffer */
322 int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp)
324 int n = *np, col = *colp;
325 char *argv[CONFIG_SYS_MAXARGS + 1]; /* NULL terminated */
329 int i, j, k, len, seplen, argc;
333 if (strcmp(prompt, CONFIG_SYS_PROMPT) != 0)
334 return 0; /* not in normal console */
338 last_char = buf[cnt - 1];
342 /* copy to secondary buffer which will be affected */
343 strcpy(tmp_buf, buf);
345 /* separate into argv */
346 argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
348 /* do the completion and return the possible completions */
349 i = complete_cmdv(argc, argv, last_char,
350 sizeof(cmdv) / sizeof(cmdv[0]), cmdv);
352 /* no match; bell and out */
354 if (argc > 1) /* allow tab for non command */
364 if (i == 1) { /* one match; perfect */
365 k = strlen(argv[argc - 1]);
370 } else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
371 k = strlen(argv[argc - 1]);
381 /* make sure it fits */
382 if (n + k >= CONFIG_SYS_CBSIZE - 2) {
388 for (i = 0; i < len; i++)
391 for (i = 0; i < seplen; i++)
402 print_argv(NULL, " ", " ", 78, cmdv);
413 int cmd_get_data_size(char* arg, int default_size)
415 /* Check for a size specification .b, .w or .l.
417 int len = strlen(arg);
418 if (len > 2 && arg[len-2] == '.') {
419 switch (arg[len-1]) {
426 #ifdef CONFIG_SYS_SUPPORT_64BIT_DATA
440 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
441 DECLARE_GLOBAL_DATA_PTR;
443 void fixup_cmdtable(cmd_tbl_t *cmdtp, int size)
447 if (gd->reloc_off == 0)
450 for (i = 0; i < size; i++) {
453 addr = (ulong)(cmdtp->cmd) + gd->reloc_off;
454 #ifdef DEBUG_COMMANDS
455 printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
456 cmdtp->name, (ulong)(cmdtp->cmd), addr);
459 (int (*)(struct cmd_tbl_s *, int, int, char * const []))addr;
460 addr = (ulong)(cmdtp->name) + gd->reloc_off;
461 cmdtp->name = (char *)addr;
463 addr = (ulong)(cmdtp->usage) + gd->reloc_off;
464 cmdtp->usage = (char *)addr;
466 #ifdef CONFIG_SYS_LONGHELP
468 addr = (ulong)(cmdtp->help) + gd->reloc_off;
469 cmdtp->help = (char *)addr;
472 #ifdef CONFIG_AUTO_COMPLETE
473 if (cmdtp->complete) {
474 addr = (ulong)(cmdtp->complete) + gd->reloc_off;
476 (int (*)(int, char * const [], char, int, char * []))addr;
485 * Call a command function. This should be the only route in U-Boot to call
486 * a command, so that we can track whether we are waiting for input or
487 * executing a command.
489 * @param cmdtp Pointer to the command to execute
490 * @param flag Some flags normally 0 (see CMD_FLAG_.. above)
491 * @param argc Number of arguments (arg 0 must be the command text)
492 * @param argv Arguments
493 * @return 0 if command succeeded, else non-zero (CMD_RET_...)
495 static int cmd_call(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
499 result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
501 debug("Command failed, result=%d\n", result);
505 enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
506 int *repeatable, ulong *ticks)
508 enum command_ret_t rc = CMD_RET_SUCCESS;
511 /* Look up command in command table */
512 cmdtp = find_cmd(argv[0]);
514 printf("Unknown command '%s' - try 'help'\n", argv[0]);
518 /* found - check max args */
519 if (argc > cmdtp->maxargs)
522 #if defined(CONFIG_CMD_BOOTD)
523 /* avoid "bootd" recursion */
524 else if (cmdtp->cmd == do_bootd) {
525 if (flag & CMD_FLAG_BOOTD) {
526 puts("'bootd' recursion detected\n");
527 rc = CMD_RET_FAILURE;
529 flag |= CMD_FLAG_BOOTD;
534 /* If OK so far, then do the command */
537 *ticks = get_timer(0);
538 rc = cmd_call(cmdtp, flag, argc, argv);
540 *ticks = get_timer(*ticks);
541 *repeatable &= cmdtp->repeatable;
543 if (rc == CMD_RET_USAGE)
544 rc = cmd_usage(cmdtp);
548 int cmd_process_error(cmd_tbl_t *cmdtp, int err)
550 if (err == CMD_RET_USAGE)
551 return CMD_RET_USAGE;
554 printf("Command '%s' failed: Error %d\n", cmdtp->name, err);
555 return CMD_RET_FAILURE;
558 return CMD_RET_SUCCESS;