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

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

/*
 *  Command Processor Table
 */

#include <common.h>
#include <command.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)
{
	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;
	}

	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[])
{
	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;
}

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];	/* 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) {
		printf("Command '%s' failed: Error %d\n", cmdtp->name, err);
		return 1;
	}

	return 0;
}
Commit	Line	Data
5dfa25f2	1	/*
2dce551e	2	* (C) Copyright 2000-2009
5dfa25f2 WD	3	* Wolfgang Denk, DENX Software Engineering, [email protected].
5dfa25f2 WD	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
5dfa25f2 WD	6	*/
	7
	8	/*
	9	* Command Processor Table
	10	*/
	11
	12	#include <common.h>
	13	#include <command.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 WD	86	{
5dfa25f2 WD	87	cmd_tbl_t *cmdtp;
616e2162	88	cmd_tbl_t cmdtp_temp = table; / Init value */
9d2b18a0 WD	89	const char *p;
	90	int len;
	91	int n_found = 0;
	92
7013c061 TW	93	if (!cmd)
7013c061 TW	94	return NULL;
9d2b18a0 WD	95	/*
	96	* Some commands allow length modifiers (like "cp.b");
	97	* compare command name only until first dot.
	98	*/
	99	len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
	100
616e2162 MY	101	for (cmdtp = table; cmdtp != table + table_len; cmdtp++) {
	102	if (strncmp(cmd, cmdtp->name, len) == 0) {
	103	if (len == strlen(cmdtp->name))
9d2b18a0 WD	104	return cmdtp; /* full match */
	105
	106	cmdtp_temp = cmdtp; /* abbreviated command ? */
	107	n_found++;
	108	}
5dfa25f2	109	}
9d2b18a0	110	if (n_found == 1) { /* exactly one match */
8bde7f77	111	return cmdtp_temp;
9d2b18a0	112	}
5dfa25f2	113
9d2b18a0	114	return NULL; /* not found or ambiguous command */
8bde7f77	115	}
04a85b3b	116
616e2162	117	cmd_tbl_t find_cmd(const char cmd)
b799cb4c	118	{
6c7c946c MV	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);
b799cb4c KG	122	}
b799cb4c KG	123
e84ffddb	124	int cmd_usage(const cmd_tbl_t *cmdtp)
62c3ae7c	125	{
94796d85 WD	126	printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
	127
	128	#ifdef CONFIG_SYS_LONGHELP
	129	printf("Usage:\n%s ", cmdtp->name);
	130
	131	if (!cmdtp->help) {
	132	puts ("- No additional help available.\n");
	133	return 1;
	134	}
	135
616e2162 MY	136	puts(cmdtp->help);
616e2162 MY	137	putc('\n');
94796d85	138	#endif /* CONFIG_SYS_LONGHELP */
47e26b1b	139	return 1;
62c3ae7c PT	140	}
62c3ae7c PT	141
04a85b3b WD	142	#ifdef CONFIG_AUTO_COMPLETE
04a85b3b WD	143
54841ab5	144	int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
04a85b3b WD	145	{
	146	static char tmp_buf[512];
	147	int space;
	148
4d91a6ec	149	space = last_char == '\0' \|\| isblank(last_char);
04a85b3b WD	150
	151	if (space && argc == 1)
	152	return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
	153
	154	if (!space && argc == 2)
	155	return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
560d424b	156
04a85b3b WD	157	return 0;
	158	}
	159
04a85b3b WD	160	/*************************************************************************************/
04a85b3b WD	161
54841ab5	162	static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
04a85b3b	163	{
6c7c946c MV	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;
04a85b3b WD	167	const char *p;
	168	int len, clen;
	169	int n_found = 0;
	170	const char *cmd;
	171
	172	/* sanity? */
	173	if (maxv < 2)
	174	return -2;
	175
	176	cmdv[0] = NULL;
	177
	178	if (argc == 0) {
	179	/* output full list of commands */
6c7c946c	180	for (; cmdtp != cmdend; cmdtp++) {
04a85b3b	181	if (n_found >= maxv - 2) {
9b438946	182	cmdv[n_found++] = "...";
04a85b3b WD	183	break;
04a85b3b WD	184	}
9b438946	185	cmdv[n_found++] = cmdtp->name;
04a85b3b WD	186	}
	187	cmdv[n_found] = NULL;
	188	return n_found;
	189	}
	190
	191	/* more than one arg or one but the start of the next */
616e2162	192	if (argc > 1 \|\| last_char == '\0' \|\| isblank(last_char)) {
04a85b3b WD	193	cmdtp = find_cmd(argv[0]);
	194	if (cmdtp == NULL \|\| cmdtp->complete == NULL) {
	195	cmdv[0] = NULL;
	196	return 0;
	197	}
	198	return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
	199	}
	200
	201	cmd = argv[0];
	202	/*
	203	* Some commands allow length modifiers (like "cp.b");
	204	* compare command name only until first dot.
	205	*/
	206	p = strchr(cmd, '.');
	207	if (p == NULL)
	208	len = strlen(cmd);
	209	else
	210	len = p - cmd;
	211
	212	/* return the partial matches */
6c7c946c	213	for (; cmdtp != cmdend; cmdtp++) {
04a85b3b WD	214
	215	clen = strlen(cmdtp->name);
	216	if (clen < len)
	217	continue;
	218
	219	if (memcmp(cmd, cmdtp->name, len) != 0)
	220	continue;
	221
	222	/* too many! */
	223	if (n_found >= maxv - 2) {
	224	cmdv[n_found++] = "...";
	225	break;
	226	}
	227
	228	cmdv[n_found++] = cmdtp->name;
	229	}
	230
	231	cmdv[n_found] = NULL;
	232	return n_found;
	233	}
	234
	235	static int make_argv(char s, int argvsz, char argv[])
	236	{
	237	int argc = 0;
	238
	239	/* split into argv */
	240	while (argc < argvsz - 1) {
	241
	242	/* skip any white space */
4d91a6ec	243	while (isblank(*s))
04a85b3b WD	244	++s;
04a85b3b WD	245
53677ef1	246	if (s == '\0') / end of s, no more args */
04a85b3b WD	247	break;
	248
	249	argv[argc++] = s; /* begin of argument string */
	250
	251	/* find end of string */
4d91a6ec	252	while (s && !isblank(s))
04a85b3b WD	253	++s;
	254
	255	if (s == '\0') / end of s, no more args */
	256	break;
	257
	258	s++ = '\0'; / terminate current arg */
	259	}
	260	argv[argc] = NULL;
	261
	262	return argc;
	263	}
	264
54841ab5	265	static void print_argv(const char banner, const char leader, const char sep, int linemax, char const argv[])
04a85b3b WD	266	{
	267	int ll = leader != NULL ? strlen(leader) : 0;
	268	int sl = sep != NULL ? strlen(sep) : 0;
	269	int len, i;
	270
	271	if (banner) {
	272	puts("\n");
	273	puts(banner);
	274	}
	275
	276	i = linemax; /* force leader and newline */
	277	while (*argv != NULL) {
	278	len = strlen(*argv) + sl;
	279	if (i + len >= linemax) {
	280	puts("\n");
	281	if (leader)
	282	puts(leader);
	283	i = ll - sl;
	284	} else if (sep)
	285	puts(sep);
	286	puts(*argv++);
	287	i += len;
	288	}
	289	printf("\n");
	290	}
	291
54841ab5	292	static int find_common_prefix(char * const argv[])
04a85b3b WD	293	{
	294	int i, len;
	295	char anchor, s, *t;
	296
	297	if (*argv == NULL)
	298	return 0;
	299
	300	/* begin with max */
	301	anchor = *argv++;
	302	len = strlen(anchor);
	303	while ((t = *argv++) != NULL) {
	304	s = anchor;
	305	for (i = 0; i < len; i++, t++, s++) {
	306	if (t != s)
	307	break;
	308	}
	309	len = s - anchor;
	310	}
	311	return len;
	312	}
	313
6d0f6bcf	314	static char tmp_buf[CONFIG_SYS_CBSIZE]; /* copy of console I/O buffer */
04a85b3b WD	315
	316	int cmd_auto_complete(const char const prompt, char buf, int np, int colp)
	317	{
	318	int n = np, col = colp;
6d0f6bcf	319	char argv[CONFIG_SYS_MAXARGS + 1]; / NULL terminated */
04a85b3b WD	320	char *cmdv[20];
	321	char s, t;
	322	const char *sep;
	323	int i, j, k, len, seplen, argc;
	324	int cnt;
	325	char last_char;
	326
6d0f6bcf	327	if (strcmp(prompt, CONFIG_SYS_PROMPT) != 0)
04a85b3b WD	328	return 0; /* not in normal console */
	329
	330	cnt = strlen(buf);
	331	if (cnt >= 1)
	332	last_char = buf[cnt - 1];
	333	else
	334	last_char = '\0';
	335
	336	/* copy to secondary buffer which will be affected */
	337	strcpy(tmp_buf, buf);
	338
	339	/* separate into argv */
	340	argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
	341
	342	/* do the completion and return the possible completions */
616e2162 MY	343	i = complete_cmdv(argc, argv, last_char,
616e2162 MY	344	sizeof(cmdv) / sizeof(cmdv[0]), cmdv);
04a85b3b WD	345
	346	/* no match; bell and out */
	347	if (i == 0) {
	348	if (argc > 1) /* allow tab for non command */
	349	return 0;
	350	putc('\a');
	351	return 1;
	352	}
	353
	354	s = NULL;
	355	len = 0;
	356	sep = NULL;
	357	seplen = 0;
	358	if (i == 1) { /* one match; perfect */
	359	k = strlen(argv[argc - 1]);
	360	s = cmdv[0] + k;
	361	len = strlen(s);
	362	sep = " ";
	363	seplen = 1;
616e2162	364	} else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
04a85b3b WD	365	k = strlen(argv[argc - 1]);
	366	j -= k;
	367	if (j > 0) {
	368	s = cmdv[0] + k;
	369	len = j;
	370	}
	371	}
	372
	373	if (s != NULL) {
	374	k = len + seplen;
	375	/* make sure it fits */
6d0f6bcf	376	if (n + k >= CONFIG_SYS_CBSIZE - 2) {
04a85b3b WD	377	putc('\a');
	378	return 1;
	379	}
	380
	381	t = buf + cnt;
	382	for (i = 0; i < len; i++)
	383	t++ = s++;
	384	if (sep != NULL)
	385	for (i = 0; i < seplen; i++)
	386	*t++ = sep[i];
	387	*t = '\0';
	388	n += k;
	389	col += k;
	390	puts(t - k);
	391	if (sep == NULL)
	392	putc('\a');
	393	*np = n;
	394	*colp = col;
	395	} else {
	396	print_argv(NULL, " ", " ", 78, cmdv);
	397
	398	puts(prompt);
	399	puts(buf);
	400	}
	401	return 1;
	402	}
	403
	404	#endif
8a40fb14 JCPV	405
	406	#ifdef CMD_DATA_SIZE
	407	int cmd_get_data_size(char* arg, int default_size)
	408	{
	409	/* Check for a size specification .b, .w or .l.
	410	*/
	411	int len = strlen(arg);
	412	if (len > 2 && arg[len-2] == '.') {
616e2162	413	switch (arg[len-1]) {
8a40fb14 JCPV	414	case 'b':
	415	return 1;
	416	case 'w':
	417	return 2;
	418	case 'l':
	419	return 4;
4d1fd7f1 YS	420	#ifdef CONFIG_SYS_SUPPORT_64BIT_DATA
	421	case 'q':
	422	return 8;
	423	#endif
8a40fb14 JCPV	424	case 's':
	425	return -2;
	426	default:
	427	return -1;
	428	}
	429	}
	430	return default_size;
	431	}
	432	#endif
620f1f6a	433
2e5167cc	434	#if defined(CONFIG_NEEDS_MANUAL_RELOC)
620f1f6a HS	435	DECLARE_GLOBAL_DATA_PTR;
	436
	437	void fixup_cmdtable(cmd_tbl_t *cmdtp, int size)
	438	{
	439	int i;
	440
	441	if (gd->reloc_off == 0)
	442	return;
	443
	444	for (i = 0; i < size; i++) {
	445	ulong addr;
	446
616e2162	447	addr = (ulong)(cmdtp->cmd) + gd->reloc_off;
2e88bb28	448	#ifdef DEBUG_COMMANDS
620f1f6a	449	printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
616e2162	450	cmdtp->name, (ulong)(cmdtp->cmd), addr);
620f1f6a HS	451	#endif
	452	cmdtp->cmd =
	453	(int ()(struct cmd_tbl_s , int, int, char * const []))addr;
	454	addr = (ulong)(cmdtp->name) + gd->reloc_off;
	455	cmdtp->name = (char *)addr;
	456	if (cmdtp->usage) {
	457	addr = (ulong)(cmdtp->usage) + gd->reloc_off;
	458	cmdtp->usage = (char *)addr;
	459	}
	460	#ifdef CONFIG_SYS_LONGHELP
	461	if (cmdtp->help) {
	462	addr = (ulong)(cmdtp->help) + gd->reloc_off;
	463	cmdtp->help = (char *)addr;
	464	}
fa28bd2e DS	465	#endif
	466	#ifdef CONFIG_AUTO_COMPLETE
	467	if (cmdtp->complete) {
	468	addr = (ulong)(cmdtp->complete) + gd->reloc_off;
3668d8fa DS	469	cmdtp->complete =
3668d8fa DS	470	(int ()(int, char const [], char, int, char * []))addr;
fa28bd2e	471	}
620f1f6a HS	472	#endif
	473	cmdtp++;
	474	}
	475	}
	476	#endif
bdf8e34b SG	477
	478	/**
	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.
	482	*
	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_...)
	488	*/
9d12d5d4	489	static int cmd_call(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
bdf8e34b SG	490	{
	491	int result;
	492
	493	result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
	494	if (result)
58b6ad68	495	debug("Command failed, result=%d\n", result);
bdf8e34b SG	496	return result;
bdf8e34b SG	497	}
9d12d5d4 SG	498
9d12d5d4 SG	499	enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
34765e88	500	int repeatable, ulong ticks)
9d12d5d4 SG	501	{
	502	enum command_ret_t rc = CMD_RET_SUCCESS;
	503	cmd_tbl_t *cmdtp;
	504
	505	/* Look up command in command table */
	506	cmdtp = find_cmd(argv[0]);
	507	if (cmdtp == NULL) {
	508	printf("Unknown command '%s' - try 'help'\n", argv[0]);
	509	return 1;
	510	}
	511
	512	/* found - check max args */
	513	if (argc > cmdtp->maxargs)
	514	rc = CMD_RET_USAGE;
	515
	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;
	522	} else {
	523	flag \|= CMD_FLAG_BOOTD;
	524	}
	525	}
	526	#endif
	527
	528	/* If OK so far, then do the command */
	529	if (!rc) {
34765e88 RG	530	if (ticks)
34765e88 RG	531	*ticks = get_timer(0);
9d12d5d4	532	rc = cmd_call(cmdtp, flag, argc, argv);
34765e88 RG	533	if (ticks)
34765e88 RG	534	ticks = get_timer(ticks);
9d12d5d4 SG	535	*repeatable &= cmdtp->repeatable;
	536	}
	537	if (rc == CMD_RET_USAGE)
	538	rc = cmd_usage(cmdtp);
	539	return rc;
	540	}
16ff9902 SG	541
	542	int cmd_process_error(cmd_tbl_t *cmdtp, int err)
	543	{
	544	if (err) {
	545	printf("Command '%s' failed: Error %d\n", cmdtp->name, err);
	546	return 1;
	547	}
	548
	549	return 0;
	550	}