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

/*
 * (C) Copyright 2000-2009
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*
 *  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 (cmd_items > CONFIG_SYS_MAXARGS) {
		printf("%s: cmd_items %d exceeds hardcoded limit %d."
		       " Recompile with higher CONFIG_SYS_MAXARGS?\n",
		       __func__, cmd_items, CONFIG_SYS_MAXARGS);
		return -1;
	}

	if (argc == 1) {	/*show list of commands */
		cmd_tbl_t *cmd_array[CONFIG_SYS_MAXARGS];
		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;
		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)
{
	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) {
		rc = cmd_call(cmdtp, flag, argc, argv);
		*repeatable &= cmdtp->repeatable;
	}
	if (rc == CMD_RET_USAGE)
		rc = cmd_usage(cmdtp);
	return rc;
}
Commit	Line	Data
5dfa25f2	1	/*
2dce551e	2	* (C) Copyright 2000-2009
5dfa25f2 WD	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	/*
	25	* Command Processor Table
	26	*/
	27
	28	#include <common.h>
	29	#include <command.h>
4d91a6ec	30	#include <linux/ctype.h>
5dfa25f2	31
5dfa25f2 WD	32	/*
	33	* Use puts() instead of printf() to avoid printf buffer overflow
	34	* for long help messages
	35	*/
2dce551e DZ	36
2dce551e DZ	37	int _do_help (cmd_tbl_t cmd_start, int cmd_items, cmd_tbl_t cmdtp, int
54841ab5	38	flag, int argc, char * const argv[])
5dfa25f2 WD	39	{
	40	int i;
	41	int rcode = 0;
	42
199adb60 KP	43	if (cmd_items > CONFIG_SYS_MAXARGS) {
	44	printf("%s: cmd_items %d exceeds hardcoded limit %d."
	45	" Recompile with higher CONFIG_SYS_MAXARGS?\n",
	46	__func__, cmd_items, CONFIG_SYS_MAXARGS);
	47	return -1;
	48	}
	49
8bde7f77	50	if (argc == 1) { /show list of commands /
199adb60	51	cmd_tbl_t *cmd_array[CONFIG_SYS_MAXARGS];
9d2b18a0 WD	52	int i, j, swaps;
	53
	54	/* Make array of commands from .uboot_cmd section */
2dce551e	55	cmdtp = cmd_start;
9d2b18a0 WD	56	for (i = 0; i < cmd_items; i++) {
9d2b18a0 WD	57	cmd_array[i] = cmdtp++;
8bde7f77	58	}
8bde7f77	59
9d2b18a0 WD	60	/* Sort command list (trivial bubble sort) */
	61	for (i = cmd_items - 1; i > 0; --i) {
	62	swaps = 0;
	63	for (j = 0; j < i; ++j) {
	64	if (strcmp (cmd_array[j]->name,
	65	cmd_array[j + 1]->name) > 0) {
	66	cmd_tbl_t *tmp;
	67	tmp = cmd_array[j];
	68	cmd_array[j] = cmd_array[j + 1];
	69	cmd_array[j + 1] = tmp;
	70	++swaps;
	71	}
8bde7f77	72	}
9d2b18a0 WD	73	if (!swaps)
9d2b18a0 WD	74	break;
8bde7f77	75	}
5dfa25f2	76
8bde7f77	77	/* print short help (usage) */
9d2b18a0 WD	78	for (i = 0; i < cmd_items; i++) {
	79	const char *usage = cmd_array[i]->usage;
	80
5dfa25f2	81	/* allow user abort */
8bde7f77	82	if (ctrlc ())
5dfa25f2	83	return 1;
9d2b18a0	84	if (usage == NULL)
5dfa25f2	85	continue;
2fb2604d PT	86	printf("%-*s- %s\n", CONFIG_SYS_HELP_CMD_WIDTH,
2fb2604d PT	87	cmd_array[i]->name, usage);
5dfa25f2	88	}
5dfa25f2 WD	89	return 0;
5dfa25f2 WD	90	}
5dfa25f2 WD	91	/*
	92	* command help (long version)
	93	*/
8bde7f77	94	for (i = 1; i < argc; ++i) {
2dce551e	95	if ((cmdtp = find_cmd_tbl (argv[i], cmd_start, cmd_items )) != NULL) {
94796d85	96	rcode \|= cmd_usage(cmdtp);
71f95118	97	} else {
5dfa25f2 WD	98	printf ("Unknown command '%s' - try 'help'"
5dfa25f2 WD	99	" without arguments for list of all"
8bde7f77 WD	100	" known commands\n\n", argv[i]
8bde7f77 WD	101	);
5dfa25f2 WD	102	rcode = 1;
	103	}
	104	}
	105	return rcode;
	106	}
	107
	108	/***************************************************************************
	109	* find command table entry for a command
	110	*/
b799cb4c	111	cmd_tbl_t find_cmd_tbl (const char cmd, cmd_tbl_t *table, int table_len)
5dfa25f2 WD	112	{
5dfa25f2 WD	113	cmd_tbl_t *cmdtp;
b799cb4c	114	cmd_tbl_t cmdtp_temp = table; /Init value */
9d2b18a0 WD	115	const char *p;
	116	int len;
	117	int n_found = 0;
	118
7013c061 TW	119	if (!cmd)
7013c061 TW	120	return NULL;
9d2b18a0 WD	121	/*
	122	* Some commands allow length modifiers (like "cp.b");
	123	* compare command name only until first dot.
	124	*/
	125	len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
	126
b799cb4c KG	127	for (cmdtp = table;
b799cb4c KG	128	cmdtp != table + table_len;
9d2b18a0 WD	129	cmdtp++) {
	130	if (strncmp (cmd, cmdtp->name, len) == 0) {
	131	if (len == strlen (cmdtp->name))
	132	return cmdtp; /* full match */
	133
	134	cmdtp_temp = cmdtp; /* abbreviated command ? */
	135	n_found++;
	136	}
5dfa25f2	137	}
9d2b18a0	138	if (n_found == 1) { /* exactly one match */
8bde7f77	139	return cmdtp_temp;
9d2b18a0	140	}
5dfa25f2	141
9d2b18a0	142	return NULL; /* not found or ambiguous command */
8bde7f77	143	}
04a85b3b	144
b799cb4c KG	145	cmd_tbl_t find_cmd (const char cmd)
b799cb4c KG	146	{
6c7c946c MV	147	cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
	148	const int len = ll_entry_count(cmd_tbl_t, cmd);
	149	return find_cmd_tbl(cmd, start, len);
b799cb4c KG	150	}
b799cb4c KG	151
e84ffddb	152	int cmd_usage(const cmd_tbl_t *cmdtp)
62c3ae7c	153	{
94796d85 WD	154	printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
	155
	156	#ifdef CONFIG_SYS_LONGHELP
	157	printf("Usage:\n%s ", cmdtp->name);
	158
	159	if (!cmdtp->help) {
	160	puts ("- No additional help available.\n");
	161	return 1;
	162	}
	163
	164	puts (cmdtp->help);
	165	putc ('\n');
	166	#endif /* CONFIG_SYS_LONGHELP */
47e26b1b	167	return 1;
62c3ae7c PT	168	}
62c3ae7c PT	169
04a85b3b WD	170	#ifdef CONFIG_AUTO_COMPLETE
04a85b3b WD	171
54841ab5	172	int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
04a85b3b WD	173	{
	174	static char tmp_buf[512];
	175	int space;
	176
4d91a6ec	177	space = last_char == '\0' \|\| isblank(last_char);
04a85b3b WD	178
	179	if (space && argc == 1)
	180	return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
	181
	182	if (!space && argc == 2)
	183	return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
560d424b	184
04a85b3b WD	185	return 0;
	186	}
	187
04a85b3b WD	188	/*************************************************************************************/
04a85b3b WD	189
54841ab5	190	static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
04a85b3b	191	{
6c7c946c MV	192	cmd_tbl_t *cmdtp = ll_entry_start(cmd_tbl_t, cmd);
	193	const int count = ll_entry_count(cmd_tbl_t, cmd);
	194	const cmd_tbl_t *cmdend = cmdtp + count;
04a85b3b WD	195	const char *p;
	196	int len, clen;
	197	int n_found = 0;
	198	const char *cmd;
	199
	200	/* sanity? */
	201	if (maxv < 2)
	202	return -2;
	203
	204	cmdv[0] = NULL;
	205
	206	if (argc == 0) {
	207	/* output full list of commands */
6c7c946c	208	for (; cmdtp != cmdend; cmdtp++) {
04a85b3b	209	if (n_found >= maxv - 2) {
6c7c946c	210	cmdv[n_found] = "...";
04a85b3b WD	211	break;
04a85b3b WD	212	}
6c7c946c	213	cmdv[n_found] = cmdtp->name;
04a85b3b WD	214	}
	215	cmdv[n_found] = NULL;
	216	return n_found;
	217	}
	218
	219	/* more than one arg or one but the start of the next */
4d91a6ec	220	if (argc > 1 \|\| (last_char == '\0' \|\| isblank(last_char))) {
04a85b3b WD	221	cmdtp = find_cmd(argv[0]);
	222	if (cmdtp == NULL \|\| cmdtp->complete == NULL) {
	223	cmdv[0] = NULL;
	224	return 0;
	225	}
	226	return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
	227	}
	228
	229	cmd = argv[0];
	230	/*
	231	* Some commands allow length modifiers (like "cp.b");
	232	* compare command name only until first dot.
	233	*/
	234	p = strchr(cmd, '.');
	235	if (p == NULL)
	236	len = strlen(cmd);
	237	else
	238	len = p - cmd;
	239
	240	/* return the partial matches */
6c7c946c	241	for (; cmdtp != cmdend; cmdtp++) {
04a85b3b WD	242
	243	clen = strlen(cmdtp->name);
	244	if (clen < len)
	245	continue;
	246
	247	if (memcmp(cmd, cmdtp->name, len) != 0)
	248	continue;
	249
	250	/* too many! */
	251	if (n_found >= maxv - 2) {
	252	cmdv[n_found++] = "...";
	253	break;
	254	}
	255
	256	cmdv[n_found++] = cmdtp->name;
	257	}
	258
	259	cmdv[n_found] = NULL;
	260	return n_found;
	261	}
	262
	263	static int make_argv(char s, int argvsz, char argv[])
	264	{
	265	int argc = 0;
	266
	267	/* split into argv */
	268	while (argc < argvsz - 1) {
	269
	270	/* skip any white space */
4d91a6ec	271	while (isblank(*s))
04a85b3b WD	272	++s;
04a85b3b WD	273
53677ef1	274	if (s == '\0') / end of s, no more args */
04a85b3b WD	275	break;
	276
	277	argv[argc++] = s; /* begin of argument string */
	278
	279	/* find end of string */
4d91a6ec	280	while (s && !isblank(s))
04a85b3b WD	281	++s;
	282
	283	if (s == '\0') / end of s, no more args */
	284	break;
	285
	286	s++ = '\0'; / terminate current arg */
	287	}
	288	argv[argc] = NULL;
	289
	290	return argc;
	291	}
	292
54841ab5	293	static void print_argv(const char banner, const char leader, const char sep, int linemax, char const argv[])
04a85b3b WD	294	{
	295	int ll = leader != NULL ? strlen(leader) : 0;
	296	int sl = sep != NULL ? strlen(sep) : 0;
	297	int len, i;
	298
	299	if (banner) {
	300	puts("\n");
	301	puts(banner);
	302	}
	303
	304	i = linemax; /* force leader and newline */
	305	while (*argv != NULL) {
	306	len = strlen(*argv) + sl;
	307	if (i + len >= linemax) {
	308	puts("\n");
	309	if (leader)
	310	puts(leader);
	311	i = ll - sl;
	312	} else if (sep)
	313	puts(sep);
	314	puts(*argv++);
	315	i += len;
	316	}
	317	printf("\n");
	318	}
	319
54841ab5	320	static int find_common_prefix(char * const argv[])
04a85b3b WD	321	{
	322	int i, len;
	323	char anchor, s, *t;
	324
	325	if (*argv == NULL)
	326	return 0;
	327
	328	/* begin with max */
	329	anchor = *argv++;
	330	len = strlen(anchor);
	331	while ((t = *argv++) != NULL) {
	332	s = anchor;
	333	for (i = 0; i < len; i++, t++, s++) {
	334	if (t != s)
	335	break;
	336	}
	337	len = s - anchor;
	338	}
	339	return len;
	340	}
	341
6d0f6bcf	342	static char tmp_buf[CONFIG_SYS_CBSIZE]; /* copy of console I/O buffer */
04a85b3b WD	343
	344	int cmd_auto_complete(const char const prompt, char buf, int np, int colp)
	345	{
	346	int n = np, col = colp;
6d0f6bcf	347	char argv[CONFIG_SYS_MAXARGS + 1]; / NULL terminated */
04a85b3b WD	348	char *cmdv[20];
	349	char s, t;
	350	const char *sep;
	351	int i, j, k, len, seplen, argc;
	352	int cnt;
	353	char last_char;
	354
6d0f6bcf	355	if (strcmp(prompt, CONFIG_SYS_PROMPT) != 0)
04a85b3b WD	356	return 0; /* not in normal console */
	357
	358	cnt = strlen(buf);
	359	if (cnt >= 1)
	360	last_char = buf[cnt - 1];
	361	else
	362	last_char = '\0';
	363
	364	/* copy to secondary buffer which will be affected */
	365	strcpy(tmp_buf, buf);
	366
	367	/* separate into argv */
	368	argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
	369
	370	/* do the completion and return the possible completions */
	371	i = complete_cmdv(argc, argv, last_char, sizeof(cmdv)/sizeof(cmdv[0]), cmdv);
	372
	373	/* no match; bell and out */
	374	if (i == 0) {
	375	if (argc > 1) /* allow tab for non command */
	376	return 0;
	377	putc('\a');
	378	return 1;
	379	}
	380
	381	s = NULL;
	382	len = 0;
	383	sep = NULL;
	384	seplen = 0;
	385	if (i == 1) { /* one match; perfect */
	386	k = strlen(argv[argc - 1]);
	387	s = cmdv[0] + k;
	388	len = strlen(s);
	389	sep = " ";
	390	seplen = 1;
	391	} else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
	392	k = strlen(argv[argc - 1]);
	393	j -= k;
	394	if (j > 0) {
	395	s = cmdv[0] + k;
	396	len = j;
	397	}
	398	}
	399
	400	if (s != NULL) {
	401	k = len + seplen;
	402	/* make sure it fits */
6d0f6bcf	403	if (n + k >= CONFIG_SYS_CBSIZE - 2) {
04a85b3b WD	404	putc('\a');
	405	return 1;
	406	}
	407
	408	t = buf + cnt;
	409	for (i = 0; i < len; i++)
	410	t++ = s++;
	411	if (sep != NULL)
	412	for (i = 0; i < seplen; i++)
	413	*t++ = sep[i];
	414	*t = '\0';
	415	n += k;
	416	col += k;
	417	puts(t - k);
	418	if (sep == NULL)
	419	putc('\a');
	420	*np = n;
	421	*colp = col;
	422	} else {
	423	print_argv(NULL, " ", " ", 78, cmdv);
	424
	425	puts(prompt);
	426	puts(buf);
	427	}
	428	return 1;
	429	}
	430
	431	#endif
8a40fb14 JCPV	432
	433	#ifdef CMD_DATA_SIZE
	434	int cmd_get_data_size(char* arg, int default_size)
	435	{
	436	/* Check for a size specification .b, .w or .l.
	437	*/
	438	int len = strlen(arg);
	439	if (len > 2 && arg[len-2] == '.') {
	440	switch(arg[len-1]) {
	441	case 'b':
	442	return 1;
	443	case 'w':
	444	return 2;
	445	case 'l':
	446	return 4;
	447	case 's':
	448	return -2;
	449	default:
	450	return -1;
	451	}
	452	}
	453	return default_size;
	454	}
	455	#endif
620f1f6a	456
2e5167cc	457	#if defined(CONFIG_NEEDS_MANUAL_RELOC)
620f1f6a HS	458	DECLARE_GLOBAL_DATA_PTR;
	459
	460	void fixup_cmdtable(cmd_tbl_t *cmdtp, int size)
	461	{
	462	int i;
	463
	464	if (gd->reloc_off == 0)
	465	return;
	466
	467	for (i = 0; i < size; i++) {
	468	ulong addr;
	469
	470	addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
	471	#if DEBUG_COMMANDS
	472	printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
	473	cmdtp->name, (ulong) (cmdtp->cmd), addr);
	474	#endif
	475	cmdtp->cmd =
	476	(int ()(struct cmd_tbl_s , int, int, char * const []))addr;
	477	addr = (ulong)(cmdtp->name) + gd->reloc_off;
	478	cmdtp->name = (char *)addr;
	479	if (cmdtp->usage) {
	480	addr = (ulong)(cmdtp->usage) + gd->reloc_off;
	481	cmdtp->usage = (char *)addr;
	482	}
	483	#ifdef CONFIG_SYS_LONGHELP
	484	if (cmdtp->help) {
	485	addr = (ulong)(cmdtp->help) + gd->reloc_off;
	486	cmdtp->help = (char *)addr;
	487	}
fa28bd2e DS	488	#endif
	489	#ifdef CONFIG_AUTO_COMPLETE
	490	if (cmdtp->complete) {
	491	addr = (ulong)(cmdtp->complete) + gd->reloc_off;
3668d8fa DS	492	cmdtp->complete =
3668d8fa DS	493	(int ()(int, char const [], char, int, char * []))addr;
fa28bd2e	494	}
620f1f6a HS	495	#endif
	496	cmdtp++;
	497	}
	498	}
	499	#endif
bdf8e34b SG	500
	501	/**
	502	* Call a command function. This should be the only route in U-Boot to call
	503	* a command, so that we can track whether we are waiting for input or
	504	* executing a command.
	505	*
	506	* @param cmdtp Pointer to the command to execute
	507	* @param flag Some flags normally 0 (see CMD_FLAG_.. above)
	508	* @param argc Number of arguments (arg 0 must be the command text)
	509	* @param argv Arguments
	510	* @return 0 if command succeeded, else non-zero (CMD_RET_...)
	511	*/
9d12d5d4	512	static int cmd_call(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
bdf8e34b SG	513	{
	514	int result;
	515
	516	result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
	517	if (result)
	518	debug("Command failed, result=%d", result);
	519	return result;
	520	}
9d12d5d4 SG	521
	522	enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
	523	int *repeatable)
	524	{
	525	enum command_ret_t rc = CMD_RET_SUCCESS;
	526	cmd_tbl_t *cmdtp;
	527
	528	/* Look up command in command table */
	529	cmdtp = find_cmd(argv[0]);
	530	if (cmdtp == NULL) {
	531	printf("Unknown command '%s' - try 'help'\n", argv[0]);
	532	return 1;
	533	}
	534
	535	/* found - check max args */
	536	if (argc > cmdtp->maxargs)
	537	rc = CMD_RET_USAGE;
	538
	539	#if defined(CONFIG_CMD_BOOTD)
	540	/* avoid "bootd" recursion */
	541	else if (cmdtp->cmd == do_bootd) {
	542	if (flag & CMD_FLAG_BOOTD) {
	543	puts("'bootd' recursion detected\n");
	544	rc = CMD_RET_FAILURE;
	545	} else {
	546	flag \|= CMD_FLAG_BOOTD;
	547	}
	548	}
	549	#endif
	550
	551	/* If OK so far, then do the command */
	552	if (!rc) {
	553	rc = cmd_call(cmdtp, flag, argc, argv);
	554	*repeatable &= cmdtp->repeatable;
	555	}
	556	if (rc == CMD_RET_USAGE)
	557	rc = cmd_usage(cmdtp);
	558	return rc;
	559	}