[J-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) {
		if ((cmdtp = find_cmd_tbl (argv[i], cmd_start, cmd_items )) != 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;
#if 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", 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 DZ	20
2dce551e DZ	21	int _do_help (cmd_tbl_t cmd_start, int cmd_items, cmd_tbl_t cmdtp, int
54841ab5	22	flag, int argc, char * const argv[])
5dfa25f2 WD	23	{
	24	int i;
	25	int rcode = 0;
	26
8bde7f77	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) {
	41	if (strcmp (cmd_array[j]->name,
	42	cmd_array[j + 1]->name) > 0) {
	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 */
8bde7f77	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) {
2dce551e	72	if ((cmdtp = find_cmd_tbl (argv[i], cmd_start, cmd_items )) != NULL) {
94796d85	73	rcode \|= cmd_usage(cmdtp);
71f95118	74	} else {
5dfa25f2 WD	75	printf ("Unknown command '%s' - try 'help'"
5dfa25f2 WD	76	" without arguments for list of all"
8bde7f77 WD	77	" known commands\n\n", argv[i]
8bde7f77 WD	78	);
5dfa25f2 WD	79	rcode = 1;
	80	}
	81	}
	82	return rcode;
	83	}
	84
	85	/***************************************************************************
	86	* find command table entry for a command
	87	*/
b799cb4c	88	cmd_tbl_t find_cmd_tbl (const char cmd, cmd_tbl_t *table, int table_len)
5dfa25f2 WD	89	{
5dfa25f2 WD	90	cmd_tbl_t *cmdtp;
b799cb4c	91	cmd_tbl_t cmdtp_temp = table; /Init value */
9d2b18a0 WD	92	const char *p;
	93	int len;
	94	int n_found = 0;
	95
7013c061 TW	96	if (!cmd)
7013c061 TW	97	return NULL;
9d2b18a0 WD	98	/*
	99	* Some commands allow length modifiers (like "cp.b");
	100	* compare command name only until first dot.
	101	*/
	102	len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
	103
b799cb4c KG	104	for (cmdtp = table;
b799cb4c KG	105	cmdtp != table + table_len;
9d2b18a0 WD	106	cmdtp++) {
	107	if (strncmp (cmd, cmdtp->name, len) == 0) {
	108	if (len == strlen (cmdtp->name))
	109	return cmdtp; /* full match */
	110
	111	cmdtp_temp = cmdtp; /* abbreviated command ? */
	112	n_found++;
	113	}
5dfa25f2	114	}
9d2b18a0	115	if (n_found == 1) { /* exactly one match */
8bde7f77	116	return cmdtp_temp;
9d2b18a0	117	}
5dfa25f2	118
9d2b18a0	119	return NULL; /* not found or ambiguous command */
8bde7f77	120	}
04a85b3b	121
b799cb4c KG	122	cmd_tbl_t find_cmd (const char cmd)
b799cb4c KG	123	{
6c7c946c MV	124	cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
	125	const int len = ll_entry_count(cmd_tbl_t, cmd);
	126	return find_cmd_tbl(cmd, start, len);
b799cb4c KG	127	}
b799cb4c KG	128
e84ffddb	129	int cmd_usage(const cmd_tbl_t *cmdtp)
62c3ae7c	130	{
94796d85 WD	131	printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
	132
	133	#ifdef CONFIG_SYS_LONGHELP
	134	printf("Usage:\n%s ", cmdtp->name);
	135
	136	if (!cmdtp->help) {
	137	puts ("- No additional help available.\n");
	138	return 1;
	139	}
	140
	141	puts (cmdtp->help);
	142	putc ('\n');
	143	#endif /* CONFIG_SYS_LONGHELP */
47e26b1b	144	return 1;
62c3ae7c PT	145	}
62c3ae7c PT	146
04a85b3b WD	147	#ifdef CONFIG_AUTO_COMPLETE
04a85b3b WD	148
54841ab5	149	int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
04a85b3b WD	150	{
	151	static char tmp_buf[512];
	152	int space;
	153
4d91a6ec	154	space = last_char == '\0' \|\| isblank(last_char);
04a85b3b WD	155
	156	if (space && argc == 1)
	157	return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
	158
	159	if (!space && argc == 2)
	160	return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
560d424b	161
04a85b3b WD	162	return 0;
	163	}
	164
04a85b3b WD	165	/*************************************************************************************/
04a85b3b WD	166
54841ab5	167	static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
04a85b3b	168	{
6c7c946c MV	169	cmd_tbl_t *cmdtp = ll_entry_start(cmd_tbl_t, cmd);
	170	const int count = ll_entry_count(cmd_tbl_t, cmd);
	171	const cmd_tbl_t *cmdend = cmdtp + count;
04a85b3b WD	172	const char *p;
	173	int len, clen;
	174	int n_found = 0;
	175	const char *cmd;
	176
	177	/* sanity? */
	178	if (maxv < 2)
	179	return -2;
	180
	181	cmdv[0] = NULL;
	182
	183	if (argc == 0) {
	184	/* output full list of commands */
6c7c946c	185	for (; cmdtp != cmdend; cmdtp++) {
04a85b3b	186	if (n_found >= maxv - 2) {
9b438946	187	cmdv[n_found++] = "...";
04a85b3b WD	188	break;
04a85b3b WD	189	}
9b438946	190	cmdv[n_found++] = cmdtp->name;
04a85b3b WD	191	}
	192	cmdv[n_found] = NULL;
	193	return n_found;
	194	}
	195
	196	/* more than one arg or one but the start of the next */
4d91a6ec	197	if (argc > 1 \|\| (last_char == '\0' \|\| isblank(last_char))) {
04a85b3b WD	198	cmdtp = find_cmd(argv[0]);
	199	if (cmdtp == NULL \|\| cmdtp->complete == NULL) {
	200	cmdv[0] = NULL;
	201	return 0;
	202	}
	203	return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
	204	}
	205
	206	cmd = argv[0];
	207	/*
	208	* Some commands allow length modifiers (like "cp.b");
	209	* compare command name only until first dot.
	210	*/
	211	p = strchr(cmd, '.');
	212	if (p == NULL)
	213	len = strlen(cmd);
	214	else
	215	len = p - cmd;
	216
	217	/* return the partial matches */
6c7c946c	218	for (; cmdtp != cmdend; cmdtp++) {
04a85b3b WD	219
	220	clen = strlen(cmdtp->name);
	221	if (clen < len)
	222	continue;
	223
	224	if (memcmp(cmd, cmdtp->name, len) != 0)
	225	continue;
	226
	227	/* too many! */
	228	if (n_found >= maxv - 2) {
	229	cmdv[n_found++] = "...";
	230	break;
	231	}
	232
	233	cmdv[n_found++] = cmdtp->name;
	234	}
	235
	236	cmdv[n_found] = NULL;
	237	return n_found;
	238	}
	239
	240	static int make_argv(char s, int argvsz, char argv[])
	241	{
	242	int argc = 0;
	243
	244	/* split into argv */
	245	while (argc < argvsz - 1) {
	246
	247	/* skip any white space */
4d91a6ec	248	while (isblank(*s))
04a85b3b WD	249	++s;
04a85b3b WD	250
53677ef1	251	if (s == '\0') / end of s, no more args */
04a85b3b WD	252	break;
	253
	254	argv[argc++] = s; /* begin of argument string */
	255
	256	/* find end of string */
4d91a6ec	257	while (s && !isblank(s))
04a85b3b WD	258	++s;
	259
	260	if (s == '\0') / end of s, no more args */
	261	break;
	262
	263	s++ = '\0'; / terminate current arg */
	264	}
	265	argv[argc] = NULL;
	266
	267	return argc;
	268	}
	269
54841ab5	270	static void print_argv(const char banner, const char leader, const char sep, int linemax, char const argv[])
04a85b3b WD	271	{
	272	int ll = leader != NULL ? strlen(leader) : 0;
	273	int sl = sep != NULL ? strlen(sep) : 0;
	274	int len, i;
	275
	276	if (banner) {
	277	puts("\n");
	278	puts(banner);
	279	}
	280
	281	i = linemax; /* force leader and newline */
	282	while (*argv != NULL) {
	283	len = strlen(*argv) + sl;
	284	if (i + len >= linemax) {
	285	puts("\n");
	286	if (leader)
	287	puts(leader);
	288	i = ll - sl;
	289	} else if (sep)
	290	puts(sep);
	291	puts(*argv++);
	292	i += len;
	293	}
	294	printf("\n");
	295	}
	296
54841ab5	297	static int find_common_prefix(char * const argv[])
04a85b3b WD	298	{
	299	int i, len;
	300	char anchor, s, *t;
	301
	302	if (*argv == NULL)
	303	return 0;
	304
	305	/* begin with max */
	306	anchor = *argv++;
	307	len = strlen(anchor);
	308	while ((t = *argv++) != NULL) {
	309	s = anchor;
	310	for (i = 0; i < len; i++, t++, s++) {
	311	if (t != s)
	312	break;
	313	}
	314	len = s - anchor;
	315	}
	316	return len;
	317	}
	318
6d0f6bcf	319	static char tmp_buf[CONFIG_SYS_CBSIZE]; /* copy of console I/O buffer */
04a85b3b WD	320
	321	int cmd_auto_complete(const char const prompt, char buf, int np, int colp)
	322	{
	323	int n = np, col = colp;
6d0f6bcf	324	char argv[CONFIG_SYS_MAXARGS + 1]; / NULL terminated */
04a85b3b WD	325	char *cmdv[20];
	326	char s, t;
	327	const char *sep;
	328	int i, j, k, len, seplen, argc;
	329	int cnt;
	330	char last_char;
	331
6d0f6bcf	332	if (strcmp(prompt, CONFIG_SYS_PROMPT) != 0)
04a85b3b WD	333	return 0; /* not in normal console */
	334
	335	cnt = strlen(buf);
	336	if (cnt >= 1)
	337	last_char = buf[cnt - 1];
	338	else
	339	last_char = '\0';
	340
	341	/* copy to secondary buffer which will be affected */
	342	strcpy(tmp_buf, buf);
	343
	344	/* separate into argv */
	345	argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
	346
	347	/* do the completion and return the possible completions */
	348	i = complete_cmdv(argc, argv, last_char, sizeof(cmdv)/sizeof(cmdv[0]), cmdv);
	349
	350	/* no match; bell and out */
	351	if (i == 0) {
	352	if (argc > 1) /* allow tab for non command */
	353	return 0;
	354	putc('\a');
	355	return 1;
	356	}
	357
	358	s = NULL;
	359	len = 0;
	360	sep = NULL;
	361	seplen = 0;
	362	if (i == 1) { /* one match; perfect */
	363	k = strlen(argv[argc - 1]);
	364	s = cmdv[0] + k;
	365	len = strlen(s);
	366	sep = " ";
	367	seplen = 1;
	368	} else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
	369	k = strlen(argv[argc - 1]);
	370	j -= k;
	371	if (j > 0) {
	372	s = cmdv[0] + k;
	373	len = j;
	374	}
	375	}
	376
	377	if (s != NULL) {
	378	k = len + seplen;
	379	/* make sure it fits */
6d0f6bcf	380	if (n + k >= CONFIG_SYS_CBSIZE - 2) {
04a85b3b WD	381	putc('\a');
	382	return 1;
	383	}
	384
	385	t = buf + cnt;
	386	for (i = 0; i < len; i++)
	387	t++ = s++;
	388	if (sep != NULL)
	389	for (i = 0; i < seplen; i++)
	390	*t++ = sep[i];
	391	*t = '\0';
	392	n += k;
	393	col += k;
	394	puts(t - k);
	395	if (sep == NULL)
	396	putc('\a');
	397	*np = n;
	398	*colp = col;
	399	} else {
	400	print_argv(NULL, " ", " ", 78, cmdv);
	401
	402	puts(prompt);
	403	puts(buf);
	404	}
	405	return 1;
	406	}
	407
	408	#endif
8a40fb14 JCPV	409
	410	#ifdef CMD_DATA_SIZE
	411	int cmd_get_data_size(char* arg, int default_size)
	412	{
	413	/* Check for a size specification .b, .w or .l.
	414	*/
	415	int len = strlen(arg);
	416	if (len > 2 && arg[len-2] == '.') {
	417	switch(arg[len-1]) {
	418	case 'b':
	419	return 1;
	420	case 'w':
	421	return 2;
	422	case 'l':
	423	return 4;
4d1fd7f1 YS	424	#ifdef CONFIG_SYS_SUPPORT_64BIT_DATA
	425	case 'q':
	426	return 8;
	427	#endif
8a40fb14 JCPV	428	case 's':
	429	return -2;
	430	default:
	431	return -1;
	432	}
	433	}
	434	return default_size;
	435	}
	436	#endif
620f1f6a	437
2e5167cc	438	#if defined(CONFIG_NEEDS_MANUAL_RELOC)
620f1f6a HS	439	DECLARE_GLOBAL_DATA_PTR;
	440
	441	void fixup_cmdtable(cmd_tbl_t *cmdtp, int size)
	442	{
	443	int i;
	444
	445	if (gd->reloc_off == 0)
	446	return;
	447
	448	for (i = 0; i < size; i++) {
	449	ulong addr;
	450
	451	addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
	452	#if DEBUG_COMMANDS
	453	printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
	454	cmdtp->name, (ulong) (cmdtp->cmd), addr);
	455	#endif
	456	cmdtp->cmd =
	457	(int ()(struct cmd_tbl_s , int, int, char * const []))addr;
	458	addr = (ulong)(cmdtp->name) + gd->reloc_off;
	459	cmdtp->name = (char *)addr;
	460	if (cmdtp->usage) {
	461	addr = (ulong)(cmdtp->usage) + gd->reloc_off;
	462	cmdtp->usage = (char *)addr;
	463	}
	464	#ifdef CONFIG_SYS_LONGHELP
	465	if (cmdtp->help) {
	466	addr = (ulong)(cmdtp->help) + gd->reloc_off;
	467	cmdtp->help = (char *)addr;
	468	}
fa28bd2e DS	469	#endif
	470	#ifdef CONFIG_AUTO_COMPLETE
	471	if (cmdtp->complete) {
	472	addr = (ulong)(cmdtp->complete) + gd->reloc_off;
3668d8fa DS	473	cmdtp->complete =
3668d8fa DS	474	(int ()(int, char const [], char, int, char * []))addr;
fa28bd2e	475	}
620f1f6a HS	476	#endif
	477	cmdtp++;
	478	}
	479	}
	480	#endif
bdf8e34b SG	481
	482	/**
	483	* Call a command function. This should be the only route in U-Boot to call
	484	* a command, so that we can track whether we are waiting for input or
	485	* executing a command.
	486	*
	487	* @param cmdtp Pointer to the command to execute
	488	* @param flag Some flags normally 0 (see CMD_FLAG_.. above)
	489	* @param argc Number of arguments (arg 0 must be the command text)
	490	* @param argv Arguments
	491	* @return 0 if command succeeded, else non-zero (CMD_RET_...)
	492	*/
9d12d5d4	493	static int cmd_call(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
bdf8e34b SG	494	{
	495	int result;
	496
	497	result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
	498	if (result)
	499	debug("Command failed, result=%d", result);
	500	return result;
	501	}
9d12d5d4 SG	502
9d12d5d4 SG	503	enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
34765e88	504	int repeatable, ulong ticks)
9d12d5d4 SG	505	{
	506	enum command_ret_t rc = CMD_RET_SUCCESS;
	507	cmd_tbl_t *cmdtp;
	508
	509	/* Look up command in command table */
	510	cmdtp = find_cmd(argv[0]);
	511	if (cmdtp == NULL) {
	512	printf("Unknown command '%s' - try 'help'\n", argv[0]);
	513	return 1;
	514	}
	515
	516	/* found - check max args */
	517	if (argc > cmdtp->maxargs)
	518	rc = CMD_RET_USAGE;
	519
	520	#if defined(CONFIG_CMD_BOOTD)
	521	/* avoid "bootd" recursion */
	522	else if (cmdtp->cmd == do_bootd) {
	523	if (flag & CMD_FLAG_BOOTD) {
	524	puts("'bootd' recursion detected\n");
	525	rc = CMD_RET_FAILURE;
	526	} else {
	527	flag \|= CMD_FLAG_BOOTD;
	528	}
	529	}
	530	#endif
	531
	532	/* If OK so far, then do the command */
	533	if (!rc) {
34765e88 RG	534	if (ticks)
34765e88 RG	535	*ticks = get_timer(0);
9d12d5d4	536	rc = cmd_call(cmdtp, flag, argc, argv);
34765e88 RG	537	if (ticks)
34765e88 RG	538	ticks = get_timer(ticks);
9d12d5d4 SG	539	*repeatable &= cmdtp->repeatable;
	540	}
	541	if (rc == CMD_RET_USAGE)
	542	rc = cmd_usage(cmdtp);
	543	return rc;
	544	}
16ff9902 SG	545
	546	int cmd_process_error(cmd_tbl_t *cmdtp, int err)
	547	{
	548	if (err) {
	549	printf("Command '%s' failed: Error %d\n", cmdtp->name, err);
	550	return 1;
	551	}
	552
	553	return 0;
	554	}