[J-u-boot.git] / common / command.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2000-2009
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 */

/*
 *  Command Processor Table
 */

#include <common.h>
#include <command.h>
#include <console.h>
#include <linux/ctype.h>

/*
 * Use puts() instead of printf() to avoid printf buffer overflow
 * for long help messages
 */

int _do_help(cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t *cmdtp, int flag,
	     int argc, char * const argv[])
{
	int i;
	int rcode = 0;

	if (argc == 1) {	/* show list of commands */
		cmd_tbl_t *cmd_array[cmd_items];
		int i, j, swaps;

		/* Make array of commands from .uboot_cmd section */
		cmdtp = cmd_start;
		for (i = 0; i < cmd_items; i++) {
			cmd_array[i] = cmdtp++;
		}

		/* Sort command list (trivial bubble sort) */
		for (i = cmd_items - 1; i > 0; --i) {
			swaps = 0;
			for (j = 0; j < i; ++j) {
				if (strcmp(cmd_array[j]->name,
					   cmd_array[j + 1]->name) > 0) {
					cmd_tbl_t *tmp;
					tmp = cmd_array[j];
					cmd_array[j] = cmd_array[j + 1];
					cmd_array[j + 1] = tmp;
					++swaps;
				}
			}
			if (!swaps)
				break;
		}

		/* print short help (usage) */
		for (i = 0; i < cmd_items; i++) {
			const char *usage = cmd_array[i]->usage;

			/* allow user abort */
			if (ctrlc())
				return 1;
			if (usage == NULL)
				continue;
			printf("%-*s- %s\n", CONFIG_SYS_HELP_CMD_WIDTH,
			       cmd_array[i]->name, usage);
		}
		return 0;
	}
	/*
	 * command help (long version)
	 */
	for (i = 1; i < argc; ++i) {
		cmdtp = find_cmd_tbl(argv[i], cmd_start, cmd_items);
		if (cmdtp != NULL) {
			rcode |= cmd_usage(cmdtp);
		} else {
			printf("Unknown command '%s' - try 'help' without arguments for list of all known commands\n\n",
			       argv[i]);
			rcode = 1;
		}
	}
	return rcode;
}

/* find command table entry for a command */
cmd_tbl_t *find_cmd_tbl(const char *cmd, cmd_tbl_t *table, int table_len)
{
#ifdef CONFIG_CMDLINE
	cmd_tbl_t *cmdtp;
	cmd_tbl_t *cmdtp_temp = table;	/* Init value */
	const char *p;
	int len;
	int n_found = 0;

	if (!cmd)
		return NULL;
	/*
	 * Some commands allow length modifiers (like "cp.b");
	 * compare command name only until first dot.
	 */
	len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);

	for (cmdtp = table; cmdtp != table + table_len; cmdtp++) {
		if (strncmp(cmd, cmdtp->name, len) == 0) {
			if (len == strlen(cmdtp->name))
				return cmdtp;	/* full match */

			cmdtp_temp = cmdtp;	/* abbreviated command ? */
			n_found++;
		}
	}
	if (n_found == 1) {			/* exactly one match */
		return cmdtp_temp;
	}
#endif /* CONFIG_CMDLINE */

	return NULL;	/* not found or ambiguous command */
}

cmd_tbl_t *find_cmd(const char *cmd)
{
	cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
	const int len = ll_entry_count(cmd_tbl_t, cmd);
	return find_cmd_tbl(cmd, start, len);
}

int cmd_usage(const cmd_tbl_t *cmdtp)
{
	printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);

#ifdef	CONFIG_SYS_LONGHELP
	printf("Usage:\n%s ", cmdtp->name);

	if (!cmdtp->help) {
		puts ("- No additional help available.\n");
		return 1;
	}

	puts(cmdtp->help);
	putc('\n');
#endif	/* CONFIG_SYS_LONGHELP */
	return 1;
}

#ifdef CONFIG_AUTO_COMPLETE

int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
{
	static char tmp_buf[512];
	int space;

	space = last_char == '\0' || isblank(last_char);

	if (space && argc == 1)
		return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);

	if (!space && argc == 2)
		return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);

	return 0;
}

/*************************************************************************************/

static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
{
#ifdef CONFIG_CMDLINE
	cmd_tbl_t *cmdtp = ll_entry_start(cmd_tbl_t, cmd);
	const int count = ll_entry_count(cmd_tbl_t, cmd);
	const cmd_tbl_t *cmdend = cmdtp + count;
	const char *p;
	int len, clen;
	int n_found = 0;
	const char *cmd;

	/* sanity? */
	if (maxv < 2)
		return -2;

	cmdv[0] = NULL;

	if (argc == 0) {
		/* output full list of commands */
		for (; cmdtp != cmdend; cmdtp++) {
			if (n_found >= maxv - 2) {
				cmdv[n_found++] = "...";
				break;
			}
			cmdv[n_found++] = cmdtp->name;
		}
		cmdv[n_found] = NULL;
		return n_found;
	}

	/* more than one arg or one but the start of the next */
	if (argc > 1 || last_char == '\0' || isblank(last_char)) {
		cmdtp = find_cmd(argv[0]);
		if (cmdtp == NULL || cmdtp->complete == NULL) {
			cmdv[0] = NULL;
			return 0;
		}
		return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
	}

	cmd = argv[0];
	/*
	 * Some commands allow length modifiers (like "cp.b");
	 * compare command name only until first dot.
	 */
	p = strchr(cmd, '.');
	if (p == NULL)
		len = strlen(cmd);
	else
		len = p - cmd;

	/* return the partial matches */
	for (; cmdtp != cmdend; cmdtp++) {

		clen = strlen(cmdtp->name);
		if (clen < len)
			continue;

		if (memcmp(cmd, cmdtp->name, len) != 0)
			continue;

		/* too many! */
		if (n_found >= maxv - 2) {
			cmdv[n_found++] = "...";
			break;
		}

		cmdv[n_found++] = cmdtp->name;
	}

	cmdv[n_found] = NULL;
	return n_found;
#else
	return 0;
#endif
}

static int make_argv(char *s, int argvsz, char *argv[])
{
	int argc = 0;

	/* split into argv */
	while (argc < argvsz - 1) {

		/* skip any white space */
		while (isblank(*s))
			++s;

		if (*s == '\0')	/* end of s, no more args	*/
			break;

		argv[argc++] = s;	/* begin of argument string	*/

		/* find end of string */
		while (*s && !isblank(*s))
			++s;

		if (*s == '\0')		/* end of s, no more args	*/
			break;

		*s++ = '\0';		/* terminate current arg	 */
	}
	argv[argc] = NULL;

	return argc;
}

static void print_argv(const char *banner, const char *leader, const char *sep, int linemax, char * const argv[])
{
	int ll = leader != NULL ? strlen(leader) : 0;
	int sl = sep != NULL ? strlen(sep) : 0;
	int len, i;

	if (banner) {
		puts("\n");
		puts(banner);
	}

	i = linemax;	/* force leader and newline */
	while (*argv != NULL) {
		len = strlen(*argv) + sl;
		if (i + len >= linemax) {
			puts("\n");
			if (leader)
				puts(leader);
			i = ll - sl;
		} else if (sep)
			puts(sep);
		puts(*argv++);
		i += len;
	}
	printf("\n");
}

static int find_common_prefix(char * const argv[])
{
	int i, len;
	char *anchor, *s, *t;

	if (*argv == NULL)
		return 0;

	/* begin with max */
	anchor = *argv++;
	len = strlen(anchor);
	while ((t = *argv++) != NULL) {
		s = anchor;
		for (i = 0; i < len; i++, t++, s++) {
			if (*t != *s)
				break;
		}
		len = s - anchor;
	}
	return len;
}

static char tmp_buf[CONFIG_SYS_CBSIZE + 1];	/* copy of console I/O buffer */

int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp)
{
	int n = *np, col = *colp;
	char *argv[CONFIG_SYS_MAXARGS + 1];		/* NULL terminated	*/
	char *cmdv[20];
	char *s, *t;
	const char *sep;
	int i, j, k, len, seplen, argc;
	int cnt;
	char last_char;

	if (strcmp(prompt, CONFIG_SYS_PROMPT) != 0)
		return 0;	/* not in normal console */

	cnt = strlen(buf);
	if (cnt >= 1)
		last_char = buf[cnt - 1];
	else
		last_char = '\0';

	/* copy to secondary buffer which will be affected */
	strcpy(tmp_buf, buf);

	/* separate into argv */
	argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);

	/* do the completion and return the possible completions */
	i = complete_cmdv(argc, argv, last_char,
			  sizeof(cmdv) / sizeof(cmdv[0]), cmdv);

	/* no match; bell and out */
	if (i == 0) {
		if (argc > 1)	/* allow tab for non command */
			return 0;
		putc('\a');
		return 1;
	}

	s = NULL;
	len = 0;
	sep = NULL;
	seplen = 0;
	if (i == 1) { /* one match; perfect */
		k = strlen(argv[argc - 1]);
		s = cmdv[0] + k;
		len = strlen(s);
		sep = " ";
		seplen = 1;
	} else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
		k = strlen(argv[argc - 1]);
		j -= k;
		if (j > 0) {
			s = cmdv[0] + k;
			len = j;
		}
	}

	if (s != NULL) {
		k = len + seplen;
		/* make sure it fits */
		if (n + k >= CONFIG_SYS_CBSIZE - 2) {
			putc('\a');
			return 1;
		}

		t = buf + cnt;
		for (i = 0; i < len; i++)
			*t++ = *s++;
		if (sep != NULL)
			for (i = 0; i < seplen; i++)
				*t++ = sep[i];
		*t = '\0';
		n += k;
		col += k;
		puts(t - k);
		if (sep == NULL)
			putc('\a');
		*np = n;
		*colp = col;
	} else {
		print_argv(NULL, "  ", " ", 78, cmdv);

		puts(prompt);
		puts(buf);
	}
	return 1;
}

#endif

#ifdef CMD_DATA_SIZE
int cmd_get_data_size(char* arg, int default_size)
{
	/* Check for a size specification .b, .w or .l.
	 */
	int len = strlen(arg);
	if (len > 2 && arg[len-2] == '.') {
		switch (arg[len-1]) {
		case 'b':
			return 1;
		case 'w':
			return 2;
		case 'l':
			return 4;
#ifdef CONFIG_SYS_SUPPORT_64BIT_DATA
		case 'q':
			return 8;
#endif
		case 's':
			return -2;
		default:
			return -1;
		}
	}
	return default_size;
}
#endif

#if defined(CONFIG_NEEDS_MANUAL_RELOC)
DECLARE_GLOBAL_DATA_PTR;

void fixup_cmdtable(cmd_tbl_t *cmdtp, int size)
{
	int	i;

	if (gd->reloc_off == 0)
		return;

	for (i = 0; i < size; i++) {
		ulong addr;

		addr = (ulong)(cmdtp->cmd) + gd->reloc_off;
#ifdef DEBUG_COMMANDS
		printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
		       cmdtp->name, (ulong)(cmdtp->cmd), addr);
#endif
		cmdtp->cmd =
			(int (*)(struct cmd_tbl_s *, int, int, char * const []))addr;
		addr = (ulong)(cmdtp->name) + gd->reloc_off;
		cmdtp->name = (char *)addr;
		if (cmdtp->usage) {
			addr = (ulong)(cmdtp->usage) + gd->reloc_off;
			cmdtp->usage = (char *)addr;
		}
#ifdef	CONFIG_SYS_LONGHELP
		if (cmdtp->help) {
			addr = (ulong)(cmdtp->help) + gd->reloc_off;
			cmdtp->help = (char *)addr;
		}
#endif
#ifdef CONFIG_AUTO_COMPLETE
		if (cmdtp->complete) {
			addr = (ulong)(cmdtp->complete) + gd->reloc_off;
			cmdtp->complete =
				(int (*)(int, char * const [], char, int, char * []))addr;
		}
#endif
		cmdtp++;
	}
}
#endif

/**
 * Call a command function. This should be the only route in U-Boot to call
 * a command, so that we can track whether we are waiting for input or
 * executing a command.
 *
 * @param cmdtp		Pointer to the command to execute
 * @param flag		Some flags normally 0 (see CMD_FLAG_.. above)
 * @param argc		Number of arguments (arg 0 must be the command text)
 * @param argv		Arguments
 * @return 0 if command succeeded, else non-zero (CMD_RET_...)
 */
static int cmd_call(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	int result;

	result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
	if (result)
		debug("Command failed, result=%d\n", result);
	return result;
}

enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
			       int *repeatable, ulong *ticks)
{
	enum command_ret_t rc = CMD_RET_SUCCESS;
	cmd_tbl_t *cmdtp;

	/* Look up command in command table */
	cmdtp = find_cmd(argv[0]);
	if (cmdtp == NULL) {
		printf("Unknown command '%s' - try 'help'\n", argv[0]);
		return 1;
	}

	/* found - check max args */
	if (argc > cmdtp->maxargs)
		rc = CMD_RET_USAGE;

#if defined(CONFIG_CMD_BOOTD)
	/* avoid "bootd" recursion */
	else if (cmdtp->cmd == do_bootd) {
		if (flag & CMD_FLAG_BOOTD) {
			puts("'bootd' recursion detected\n");
			rc = CMD_RET_FAILURE;
		} else {
			flag |= CMD_FLAG_BOOTD;
		}
	}
#endif

	/* If OK so far, then do the command */
	if (!rc) {
		if (ticks)
			*ticks = get_timer(0);
		rc = cmd_call(cmdtp, flag, argc, argv);
		if (ticks)
			*ticks = get_timer(*ticks);
		*repeatable &= cmdtp->repeatable;
	}
	if (rc == CMD_RET_USAGE)
		rc = cmd_usage(cmdtp);
	return rc;
}

int cmd_process_error(cmd_tbl_t *cmdtp, int err)
{
	if (err == CMD_RET_USAGE)
		return CMD_RET_USAGE;

	if (err) {
		printf("Command '%s' failed: Error %d\n", cmdtp->name, err);
		return CMD_RET_FAILURE;
	}

	return CMD_RET_SUCCESS;
}
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
5dfa25f2	2	/*
2dce551e	3	* (C) Copyright 2000-2009
5dfa25f2	4	* Wolfgang Denk, DENX Software Engineering, [email protected].
5dfa25f2 WD	5	*/
	6
	7	/*
	8	* Command Processor Table
	9	*/
	10
	11	#include <common.h>
	12	#include <command.h>
24b852a7	13	#include <console.h>
4d91a6ec	14	#include <linux/ctype.h>
5dfa25f2	15
5dfa25f2 WD	16	/*
	17	* Use puts() instead of printf() to avoid printf buffer overflow
	18	* for long help messages
	19	*/
2dce551e	20
616e2162 MY	21	int _do_help(cmd_tbl_t cmd_start, int cmd_items, cmd_tbl_t cmdtp, int flag,
616e2162 MY	22	int argc, char * const argv[])
5dfa25f2 WD	23	{
	24	int i;
	25	int rcode = 0;
	26
616e2162	27	if (argc == 1) { /* show list of commands */
22b6fcb5	28	cmd_tbl_t *cmd_array[cmd_items];
9d2b18a0 WD	29	int i, j, swaps;
	30
	31	/* Make array of commands from .uboot_cmd section */
2dce551e	32	cmdtp = cmd_start;
9d2b18a0 WD	33	for (i = 0; i < cmd_items; i++) {
9d2b18a0 WD	34	cmd_array[i] = cmdtp++;
8bde7f77	35	}
8bde7f77	36
9d2b18a0 WD	37	/* Sort command list (trivial bubble sort) */
	38	for (i = cmd_items - 1; i > 0; --i) {
	39	swaps = 0;
	40	for (j = 0; j < i; ++j) {
616e2162 MY	41	if (strcmp(cmd_array[j]->name,
616e2162 MY	42	cmd_array[j + 1]->name) > 0) {
9d2b18a0 WD	43	cmd_tbl_t *tmp;
	44	tmp = cmd_array[j];
	45	cmd_array[j] = cmd_array[j + 1];
	46	cmd_array[j + 1] = tmp;
	47	++swaps;
	48	}
8bde7f77	49	}
9d2b18a0 WD	50	if (!swaps)
9d2b18a0 WD	51	break;
8bde7f77	52	}
5dfa25f2	53
8bde7f77	54	/* print short help (usage) */
9d2b18a0 WD	55	for (i = 0; i < cmd_items; i++) {
	56	const char *usage = cmd_array[i]->usage;
	57
5dfa25f2	58	/* allow user abort */
616e2162	59	if (ctrlc())
5dfa25f2	60	return 1;
9d2b18a0	61	if (usage == NULL)
5dfa25f2	62	continue;
2fb2604d PT	63	printf("%-*s- %s\n", CONFIG_SYS_HELP_CMD_WIDTH,
2fb2604d PT	64	cmd_array[i]->name, usage);
5dfa25f2	65	}
5dfa25f2 WD	66	return 0;
5dfa25f2 WD	67	}
5dfa25f2 WD	68	/*
	69	* command help (long version)
	70	*/
8bde7f77	71	for (i = 1; i < argc; ++i) {
616e2162 MY	72	cmdtp = find_cmd_tbl(argv[i], cmd_start, cmd_items);
616e2162 MY	73	if (cmdtp != NULL) {
94796d85	74	rcode \|= cmd_usage(cmdtp);
71f95118	75	} else {
616e2162 MY	76	printf("Unknown command '%s' - try 'help' without arguments for list of all known commands\n\n",
616e2162 MY	77	argv[i]);
5dfa25f2 WD	78	rcode = 1;
	79	}
	80	}
	81	return rcode;
	82	}
	83
616e2162 MY	84	/* find command table entry for a command */
616e2162 MY	85	cmd_tbl_t find_cmd_tbl(const char cmd, cmd_tbl_t *table, int table_len)
5dfa25f2	86	{
f8bb6964	87	#ifdef CONFIG_CMDLINE
5dfa25f2	88	cmd_tbl_t *cmdtp;
616e2162	89	cmd_tbl_t cmdtp_temp = table; / Init value */
9d2b18a0 WD	90	const char *p;
	91	int len;
	92	int n_found = 0;
	93
7013c061 TW	94	if (!cmd)
7013c061 TW	95	return NULL;
9d2b18a0 WD	96	/*
	97	* Some commands allow length modifiers (like "cp.b");
	98	* compare command name only until first dot.
	99	*/
	100	len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
	101
616e2162 MY	102	for (cmdtp = table; cmdtp != table + table_len; cmdtp++) {
	103	if (strncmp(cmd, cmdtp->name, len) == 0) {
	104	if (len == strlen(cmdtp->name))
9d2b18a0 WD	105	return cmdtp; /* full match */
	106
	107	cmdtp_temp = cmdtp; /* abbreviated command ? */
	108	n_found++;
	109	}
5dfa25f2	110	}
9d2b18a0	111	if (n_found == 1) { /* exactly one match */
8bde7f77	112	return cmdtp_temp;
9d2b18a0	113	}
f8bb6964	114	#endif /* CONFIG_CMDLINE */
5dfa25f2	115
9d2b18a0	116	return NULL; /* not found or ambiguous command */
8bde7f77	117	}
04a85b3b	118
616e2162	119	cmd_tbl_t find_cmd(const char cmd)
b799cb4c	120	{
6c7c946c MV	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);
b799cb4c KG	124	}
b799cb4c KG	125
e84ffddb	126	int cmd_usage(const cmd_tbl_t *cmdtp)
62c3ae7c	127	{
94796d85 WD	128	printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
	129
	130	#ifdef CONFIG_SYS_LONGHELP
	131	printf("Usage:\n%s ", cmdtp->name);
	132
	133	if (!cmdtp->help) {
	134	puts ("- No additional help available.\n");
	135	return 1;
	136	}
	137
616e2162 MY	138	puts(cmdtp->help);
616e2162 MY	139	putc('\n');
94796d85	140	#endif /* CONFIG_SYS_LONGHELP */
47e26b1b	141	return 1;
62c3ae7c PT	142	}
62c3ae7c PT	143
04a85b3b WD	144	#ifdef CONFIG_AUTO_COMPLETE
04a85b3b WD	145
54841ab5	146	int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
04a85b3b WD	147	{
	148	static char tmp_buf[512];
	149	int space;
	150
4d91a6ec	151	space = last_char == '\0' \|\| isblank(last_char);
04a85b3b WD	152
	153	if (space && argc == 1)
	154	return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
	155
	156	if (!space && argc == 2)
	157	return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
560d424b	158
04a85b3b WD	159	return 0;
	160	}
	161
04a85b3b WD	162	/*************************************************************************************/
04a85b3b WD	163
54841ab5	164	static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
04a85b3b	165	{
f8bb6964	166	#ifdef CONFIG_CMDLINE
6c7c946c MV	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;
04a85b3b WD	170	const char *p;
	171	int len, clen;
	172	int n_found = 0;
	173	const char *cmd;
	174
	175	/* sanity? */
	176	if (maxv < 2)
	177	return -2;
	178
	179	cmdv[0] = NULL;
	180
	181	if (argc == 0) {
	182	/* output full list of commands */
6c7c946c	183	for (; cmdtp != cmdend; cmdtp++) {
04a85b3b	184	if (n_found >= maxv - 2) {
9b438946	185	cmdv[n_found++] = "...";
04a85b3b WD	186	break;
04a85b3b WD	187	}
9b438946	188	cmdv[n_found++] = cmdtp->name;
04a85b3b WD	189	}
	190	cmdv[n_found] = NULL;
	191	return n_found;
	192	}
	193
	194	/* more than one arg or one but the start of the next */
616e2162	195	if (argc > 1 \|\| last_char == '\0' \|\| isblank(last_char)) {
04a85b3b WD	196	cmdtp = find_cmd(argv[0]);
	197	if (cmdtp == NULL \|\| cmdtp->complete == NULL) {
	198	cmdv[0] = NULL;
	199	return 0;
	200	}
	201	return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
	202	}
	203
	204	cmd = argv[0];
	205	/*
	206	* Some commands allow length modifiers (like "cp.b");
	207	* compare command name only until first dot.
	208	*/
	209	p = strchr(cmd, '.');
	210	if (p == NULL)
	211	len = strlen(cmd);
	212	else
	213	len = p - cmd;
	214
	215	/* return the partial matches */
6c7c946c	216	for (; cmdtp != cmdend; cmdtp++) {
04a85b3b WD	217
	218	clen = strlen(cmdtp->name);
	219	if (clen < len)
	220	continue;
	221
	222	if (memcmp(cmd, cmdtp->name, len) != 0)
	223	continue;
	224
	225	/* too many! */
	226	if (n_found >= maxv - 2) {
	227	cmdv[n_found++] = "...";
	228	break;
	229	}
	230
	231	cmdv[n_found++] = cmdtp->name;
	232	}
	233
	234	cmdv[n_found] = NULL;
	235	return n_found;
f8bb6964 SG	236	#else
	237	return 0;
	238	#endif
04a85b3b WD	239	}
	240
	241	static int make_argv(char s, int argvsz, char argv[])
	242	{
	243	int argc = 0;
	244
	245	/* split into argv */
	246	while (argc < argvsz - 1) {
	247
	248	/* skip any white space */
4d91a6ec	249	while (isblank(*s))
04a85b3b WD	250	++s;
04a85b3b WD	251
53677ef1	252	if (s == '\0') / end of s, no more args */
04a85b3b WD	253	break;
	254
	255	argv[argc++] = s; /* begin of argument string */
	256
	257	/* find end of string */
4d91a6ec	258	while (s && !isblank(s))
04a85b3b WD	259	++s;
	260
	261	if (s == '\0') / end of s, no more args */
	262	break;
	263
	264	s++ = '\0'; / terminate current arg */
	265	}
	266	argv[argc] = NULL;
	267
	268	return argc;
	269	}
	270
54841ab5	271	static void print_argv(const char banner, const char leader, const char sep, int linemax, char const argv[])
04a85b3b WD	272	{
	273	int ll = leader != NULL ? strlen(leader) : 0;
	274	int sl = sep != NULL ? strlen(sep) : 0;
	275	int len, i;
	276
	277	if (banner) {
	278	puts("\n");
	279	puts(banner);
	280	}
	281
	282	i = linemax; /* force leader and newline */
	283	while (*argv != NULL) {
	284	len = strlen(*argv) + sl;
	285	if (i + len >= linemax) {
	286	puts("\n");
	287	if (leader)
	288	puts(leader);
	289	i = ll - sl;
	290	} else if (sep)
	291	puts(sep);
	292	puts(*argv++);
	293	i += len;
	294	}
	295	printf("\n");
	296	}
	297
54841ab5	298	static int find_common_prefix(char * const argv[])
04a85b3b WD	299	{
	300	int i, len;
	301	char anchor, s, *t;
	302
	303	if (*argv == NULL)
	304	return 0;
	305
	306	/* begin with max */
	307	anchor = *argv++;
	308	len = strlen(anchor);
	309	while ((t = *argv++) != NULL) {
	310	s = anchor;
	311	for (i = 0; i < len; i++, t++, s++) {
	312	if (t != s)
	313	break;
	314	}
	315	len = s - anchor;
	316	}
	317	return len;
	318	}
	319
2614a208	320	static char tmp_buf[CONFIG_SYS_CBSIZE + 1]; /* copy of console I/O buffer */
04a85b3b WD	321
	322	int cmd_auto_complete(const char const prompt, char buf, int np, int colp)
	323	{
	324	int n = np, col = colp;
6d0f6bcf	325	char argv[CONFIG_SYS_MAXARGS + 1]; / NULL terminated */
04a85b3b WD	326	char *cmdv[20];
	327	char s, t;
	328	const char *sep;
	329	int i, j, k, len, seplen, argc;
	330	int cnt;
	331	char last_char;
	332
6d0f6bcf	333	if (strcmp(prompt, CONFIG_SYS_PROMPT) != 0)
04a85b3b WD	334	return 0; /* not in normal console */
	335
	336	cnt = strlen(buf);
	337	if (cnt >= 1)
	338	last_char = buf[cnt - 1];
	339	else
	340	last_char = '\0';
	341
	342	/* copy to secondary buffer which will be affected */
	343	strcpy(tmp_buf, buf);
	344
	345	/* separate into argv */
	346	argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
	347
	348	/* do the completion and return the possible completions */
616e2162 MY	349	i = complete_cmdv(argc, argv, last_char,
616e2162 MY	350	sizeof(cmdv) / sizeof(cmdv[0]), cmdv);
04a85b3b WD	351
	352	/* no match; bell and out */
	353	if (i == 0) {
	354	if (argc > 1) /* allow tab for non command */
	355	return 0;
	356	putc('\a');
	357	return 1;
	358	}
	359
	360	s = NULL;
	361	len = 0;
	362	sep = NULL;
	363	seplen = 0;
	364	if (i == 1) { /* one match; perfect */
	365	k = strlen(argv[argc - 1]);
	366	s = cmdv[0] + k;
	367	len = strlen(s);
	368	sep = " ";
	369	seplen = 1;
616e2162	370	} else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
04a85b3b WD	371	k = strlen(argv[argc - 1]);
	372	j -= k;
	373	if (j > 0) {
	374	s = cmdv[0] + k;
	375	len = j;
	376	}
	377	}
	378
	379	if (s != NULL) {
	380	k = len + seplen;
	381	/* make sure it fits */
6d0f6bcf	382	if (n + k >= CONFIG_SYS_CBSIZE - 2) {
04a85b3b WD	383	putc('\a');
	384	return 1;
	385	}
	386
	387	t = buf + cnt;
	388	for (i = 0; i < len; i++)
	389	t++ = s++;
	390	if (sep != NULL)
	391	for (i = 0; i < seplen; i++)
	392	*t++ = sep[i];
	393	*t = '\0';
	394	n += k;
	395	col += k;
	396	puts(t - k);
	397	if (sep == NULL)
	398	putc('\a');
	399	*np = n;
	400	*colp = col;
	401	} else {
	402	print_argv(NULL, " ", " ", 78, cmdv);
	403
	404	puts(prompt);
	405	puts(buf);
	406	}
	407	return 1;
	408	}
	409
	410	#endif
8a40fb14 JCPV	411
	412	#ifdef CMD_DATA_SIZE
	413	int cmd_get_data_size(char* arg, int default_size)
	414	{
	415	/* Check for a size specification .b, .w or .l.
	416	*/
	417	int len = strlen(arg);
	418	if (len > 2 && arg[len-2] == '.') {
616e2162	419	switch (arg[len-1]) {
8a40fb14 JCPV	420	case 'b':
	421	return 1;
	422	case 'w':
	423	return 2;
	424	case 'l':
	425	return 4;
4d1fd7f1 YS	426	#ifdef CONFIG_SYS_SUPPORT_64BIT_DATA
	427	case 'q':
	428	return 8;
	429	#endif
8a40fb14 JCPV	430	case 's':
	431	return -2;
	432	default:
	433	return -1;
	434	}
	435	}
	436	return default_size;
	437	}
	438	#endif
620f1f6a	439
2e5167cc	440	#if defined(CONFIG_NEEDS_MANUAL_RELOC)
620f1f6a HS	441	DECLARE_GLOBAL_DATA_PTR;
	442
	443	void fixup_cmdtable(cmd_tbl_t *cmdtp, int size)
	444	{
	445	int i;
	446
	447	if (gd->reloc_off == 0)
	448	return;
	449
	450	for (i = 0; i < size; i++) {
	451	ulong addr;
	452
616e2162	453	addr = (ulong)(cmdtp->cmd) + gd->reloc_off;
2e88bb28	454	#ifdef DEBUG_COMMANDS
620f1f6a	455	printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
616e2162	456	cmdtp->name, (ulong)(cmdtp->cmd), addr);
620f1f6a HS	457	#endif
	458	cmdtp->cmd =
	459	(int ()(struct cmd_tbl_s , int, int, char * const []))addr;
	460	addr = (ulong)(cmdtp->name) + gd->reloc_off;
	461	cmdtp->name = (char *)addr;
	462	if (cmdtp->usage) {
	463	addr = (ulong)(cmdtp->usage) + gd->reloc_off;
	464	cmdtp->usage = (char *)addr;
	465	}
	466	#ifdef CONFIG_SYS_LONGHELP
	467	if (cmdtp->help) {
	468	addr = (ulong)(cmdtp->help) + gd->reloc_off;
	469	cmdtp->help = (char *)addr;
	470	}
fa28bd2e DS	471	#endif
	472	#ifdef CONFIG_AUTO_COMPLETE
	473	if (cmdtp->complete) {
	474	addr = (ulong)(cmdtp->complete) + gd->reloc_off;
3668d8fa DS	475	cmdtp->complete =
3668d8fa DS	476	(int ()(int, char const [], char, int, char * []))addr;
fa28bd2e	477	}
620f1f6a HS	478	#endif
	479	cmdtp++;
	480	}
	481	}
	482	#endif
bdf8e34b SG	483
	484	/**
	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.
	488	*
	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_...)
	494	*/
9d12d5d4	495	static int cmd_call(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
bdf8e34b SG	496	{
	497	int result;
	498
	499	result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
	500	if (result)
58b6ad68	501	debug("Command failed, result=%d\n", result);
bdf8e34b SG	502	return result;
bdf8e34b SG	503	}
9d12d5d4 SG	504
9d12d5d4 SG	505	enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
34765e88	506	int repeatable, ulong ticks)
9d12d5d4 SG	507	{
	508	enum command_ret_t rc = CMD_RET_SUCCESS;
	509	cmd_tbl_t *cmdtp;
	510
	511	/* Look up command in command table */
	512	cmdtp = find_cmd(argv[0]);
	513	if (cmdtp == NULL) {
	514	printf("Unknown command '%s' - try 'help'\n", argv[0]);
	515	return 1;
	516	}
	517
	518	/* found - check max args */
	519	if (argc > cmdtp->maxargs)
	520	rc = CMD_RET_USAGE;
	521
	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;
	528	} else {
	529	flag \|= CMD_FLAG_BOOTD;
	530	}
	531	}
	532	#endif
	533
	534	/* If OK so far, then do the command */
	535	if (!rc) {
34765e88 RG	536	if (ticks)
34765e88 RG	537	*ticks = get_timer(0);
9d12d5d4	538	rc = cmd_call(cmdtp, flag, argc, argv);
34765e88 RG	539	if (ticks)
34765e88 RG	540	ticks = get_timer(ticks);
9d12d5d4 SG	541	*repeatable &= cmdtp->repeatable;
	542	}
	543	if (rc == CMD_RET_USAGE)
	544	rc = cmd_usage(cmdtp);
	545	return rc;
	546	}
16ff9902 SG	547
	548	int cmd_process_error(cmd_tbl_t *cmdtp, int err)
	549	{
27eb7bce MS	550	if (err == CMD_RET_USAGE)
	551	return CMD_RET_USAGE;
	552
16ff9902 SG	553	if (err) {
16ff9902 SG	554	printf("Command '%s' failed: Error %d\n", cmdtp->name, err);
37233240	555	return CMD_RET_FAILURE;
16ff9902 SG	556	}
16ff9902 SG	557
37233240	558	return CMD_RET_SUCCESS;
16ff9902	559	}