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

/*
 * (C) Copyright 2000-2009
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*
 *  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)
{
	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, wd@denx.de.
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>
24b852a7	14	#include <console.h>
4d91a6ec	15	#include <linux/ctype.h>
5dfa25f2	16
5dfa25f2 WD	17	/*
	18	* Use puts() instead of printf() to avoid printf buffer overflow
	19	* for long help messages
	20	*/
2dce551e	21
616e2162 MY	22	int _do_help(cmd_tbl_t cmd_start, int cmd_items, cmd_tbl_t cmdtp, int flag,
616e2162 MY	23	int argc, char * const argv[])
5dfa25f2 WD	24	{
	25	int i;
	26	int rcode = 0;
	27
616e2162	28	if (argc == 1) { /* show list of commands */
22b6fcb5	29	cmd_tbl_t *cmd_array[cmd_items];
9d2b18a0 WD	30	int i, j, swaps;
	31
	32	/* Make array of commands from .uboot_cmd section */
2dce551e	33	cmdtp = cmd_start;
9d2b18a0 WD	34	for (i = 0; i < cmd_items; i++) {
9d2b18a0 WD	35	cmd_array[i] = cmdtp++;
8bde7f77	36	}
8bde7f77	37
9d2b18a0 WD	38	/* Sort command list (trivial bubble sort) */
	39	for (i = cmd_items - 1; i > 0; --i) {
	40	swaps = 0;
	41	for (j = 0; j < i; ++j) {
616e2162 MY	42	if (strcmp(cmd_array[j]->name,
616e2162 MY	43	cmd_array[j + 1]->name) > 0) {
9d2b18a0 WD	44	cmd_tbl_t *tmp;
	45	tmp = cmd_array[j];
	46	cmd_array[j] = cmd_array[j + 1];
	47	cmd_array[j + 1] = tmp;
	48	++swaps;
	49	}
8bde7f77	50	}
9d2b18a0 WD	51	if (!swaps)
9d2b18a0 WD	52	break;
8bde7f77	53	}
5dfa25f2	54
8bde7f77	55	/* print short help (usage) */
9d2b18a0 WD	56	for (i = 0; i < cmd_items; i++) {
	57	const char *usage = cmd_array[i]->usage;
	58
5dfa25f2	59	/* allow user abort */
616e2162	60	if (ctrlc())
5dfa25f2	61	return 1;
9d2b18a0	62	if (usage == NULL)
5dfa25f2	63	continue;
2fb2604d PT	64	printf("%-*s- %s\n", CONFIG_SYS_HELP_CMD_WIDTH,
2fb2604d PT	65	cmd_array[i]->name, usage);
5dfa25f2	66	}
5dfa25f2 WD	67	return 0;
5dfa25f2 WD	68	}
5dfa25f2 WD	69	/*
	70	* command help (long version)
	71	*/
8bde7f77	72	for (i = 1; i < argc; ++i) {
616e2162 MY	73	cmdtp = find_cmd_tbl(argv[i], cmd_start, cmd_items);
616e2162 MY	74	if (cmdtp != NULL) {
94796d85	75	rcode \|= cmd_usage(cmdtp);
71f95118	76	} else {
616e2162 MY	77	printf("Unknown command '%s' - try 'help' without arguments for list of all known commands\n\n",
616e2162 MY	78	argv[i]);
5dfa25f2 WD	79	rcode = 1;
	80	}
	81	}
	82	return rcode;
	83	}
	84
616e2162 MY	85	/* find command table entry for a command */
616e2162 MY	86	cmd_tbl_t find_cmd_tbl(const char cmd, cmd_tbl_t *table, int table_len)
5dfa25f2 WD	87	{
5dfa25f2 WD	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	}
5dfa25f2	114
9d2b18a0	115	return NULL; /* not found or ambiguous command */
8bde7f77	116	}
04a85b3b	117
616e2162	118	cmd_tbl_t find_cmd(const char cmd)
b799cb4c	119	{
6c7c946c MV	120	cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
	121	const int len = ll_entry_count(cmd_tbl_t, cmd);
	122	return find_cmd_tbl(cmd, start, len);
b799cb4c KG	123	}
b799cb4c KG	124
e84ffddb	125	int cmd_usage(const cmd_tbl_t *cmdtp)
62c3ae7c	126	{
94796d85 WD	127	printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
	128
	129	#ifdef CONFIG_SYS_LONGHELP
	130	printf("Usage:\n%s ", cmdtp->name);
	131
	132	if (!cmdtp->help) {
	133	puts ("- No additional help available.\n");
	134	return 1;
	135	}
	136
616e2162 MY	137	puts(cmdtp->help);
616e2162 MY	138	putc('\n');
94796d85	139	#endif /* CONFIG_SYS_LONGHELP */
47e26b1b	140	return 1;
62c3ae7c PT	141	}
62c3ae7c PT	142
04a85b3b WD	143	#ifdef CONFIG_AUTO_COMPLETE
04a85b3b WD	144
54841ab5	145	int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
04a85b3b WD	146	{
	147	static char tmp_buf[512];
	148	int space;
	149
4d91a6ec	150	space = last_char == '\0' \|\| isblank(last_char);
04a85b3b WD	151
	152	if (space && argc == 1)
	153	return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
	154
	155	if (!space && argc == 2)
	156	return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
560d424b	157
04a85b3b WD	158	return 0;
	159	}
	160
04a85b3b WD	161	/*************************************************************************************/
04a85b3b WD	162
54841ab5	163	static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
04a85b3b	164	{
6c7c946c MV	165	cmd_tbl_t *cmdtp = ll_entry_start(cmd_tbl_t, cmd);
	166	const int count = ll_entry_count(cmd_tbl_t, cmd);
	167	const cmd_tbl_t *cmdend = cmdtp + count;
04a85b3b WD	168	const char *p;
	169	int len, clen;
	170	int n_found = 0;
	171	const char *cmd;
	172
	173	/* sanity? */
	174	if (maxv < 2)
	175	return -2;
	176
	177	cmdv[0] = NULL;
	178
	179	if (argc == 0) {
	180	/* output full list of commands */
6c7c946c	181	for (; cmdtp != cmdend; cmdtp++) {
04a85b3b	182	if (n_found >= maxv - 2) {
9b438946	183	cmdv[n_found++] = "...";
04a85b3b WD	184	break;
04a85b3b WD	185	}
9b438946	186	cmdv[n_found++] = cmdtp->name;
04a85b3b WD	187	}
	188	cmdv[n_found] = NULL;
	189	return n_found;
	190	}
	191
	192	/* more than one arg or one but the start of the next */
616e2162	193	if (argc > 1 \|\| last_char == '\0' \|\| isblank(last_char)) {
04a85b3b WD	194	cmdtp = find_cmd(argv[0]);
	195	if (cmdtp == NULL \|\| cmdtp->complete == NULL) {
	196	cmdv[0] = NULL;
	197	return 0;
	198	}
	199	return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
	200	}
	201
	202	cmd = argv[0];
	203	/*
	204	* Some commands allow length modifiers (like "cp.b");
	205	* compare command name only until first dot.
	206	*/
	207	p = strchr(cmd, '.');
	208	if (p == NULL)
	209	len = strlen(cmd);
	210	else
	211	len = p - cmd;
	212
	213	/* return the partial matches */
6c7c946c	214	for (; cmdtp != cmdend; cmdtp++) {
04a85b3b WD	215
	216	clen = strlen(cmdtp->name);
	217	if (clen < len)
	218	continue;
	219
	220	if (memcmp(cmd, cmdtp->name, len) != 0)
	221	continue;
	222
	223	/* too many! */
	224	if (n_found >= maxv - 2) {
	225	cmdv[n_found++] = "...";
	226	break;
	227	}
	228
	229	cmdv[n_found++] = cmdtp->name;
	230	}
	231
	232	cmdv[n_found] = NULL;
	233	return n_found;
	234	}
	235
	236	static int make_argv(char s, int argvsz, char argv[])
	237	{
	238	int argc = 0;
	239
	240	/* split into argv */
	241	while (argc < argvsz - 1) {
	242
	243	/* skip any white space */
4d91a6ec	244	while (isblank(*s))
04a85b3b WD	245	++s;
04a85b3b WD	246
53677ef1	247	if (s == '\0') / end of s, no more args */
04a85b3b WD	248	break;
	249
	250	argv[argc++] = s; /* begin of argument string */
	251
	252	/* find end of string */
4d91a6ec	253	while (s && !isblank(s))
04a85b3b WD	254	++s;
	255
	256	if (s == '\0') / end of s, no more args */
	257	break;
	258
	259	s++ = '\0'; / terminate current arg */
	260	}
	261	argv[argc] = NULL;
	262
	263	return argc;
	264	}
	265
54841ab5	266	static void print_argv(const char banner, const char leader, const char sep, int linemax, char const argv[])
04a85b3b WD	267	{
	268	int ll = leader != NULL ? strlen(leader) : 0;
	269	int sl = sep != NULL ? strlen(sep) : 0;
	270	int len, i;
	271
	272	if (banner) {
	273	puts("\n");
	274	puts(banner);
	275	}
	276
	277	i = linemax; /* force leader and newline */
	278	while (*argv != NULL) {
	279	len = strlen(*argv) + sl;
	280	if (i + len >= linemax) {
	281	puts("\n");
	282	if (leader)
	283	puts(leader);
	284	i = ll - sl;
	285	} else if (sep)
	286	puts(sep);
	287	puts(*argv++);
	288	i += len;
	289	}
	290	printf("\n");
	291	}
	292
54841ab5	293	static int find_common_prefix(char * const argv[])
04a85b3b WD	294	{
	295	int i, len;
	296	char anchor, s, *t;
	297
	298	if (*argv == NULL)
	299	return 0;
	300
	301	/* begin with max */
	302	anchor = *argv++;
	303	len = strlen(anchor);
	304	while ((t = *argv++) != NULL) {
	305	s = anchor;
	306	for (i = 0; i < len; i++, t++, s++) {
	307	if (t != s)
	308	break;
	309	}
	310	len = s - anchor;
	311	}
	312	return len;
	313	}
	314
6d0f6bcf	315	static char tmp_buf[CONFIG_SYS_CBSIZE]; /* copy of console I/O buffer */
04a85b3b WD	316
	317	int cmd_auto_complete(const char const prompt, char buf, int np, int colp)
	318	{
	319	int n = np, col = colp;
6d0f6bcf	320	char argv[CONFIG_SYS_MAXARGS + 1]; / NULL terminated */
04a85b3b WD	321	char *cmdv[20];
	322	char s, t;
	323	const char *sep;
	324	int i, j, k, len, seplen, argc;
	325	int cnt;
	326	char last_char;
	327
6d0f6bcf	328	if (strcmp(prompt, CONFIG_SYS_PROMPT) != 0)
04a85b3b WD	329	return 0; /* not in normal console */
	330
	331	cnt = strlen(buf);
	332	if (cnt >= 1)
	333	last_char = buf[cnt - 1];
	334	else
	335	last_char = '\0';
	336
	337	/* copy to secondary buffer which will be affected */
	338	strcpy(tmp_buf, buf);
	339
	340	/* separate into argv */
	341	argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
	342
	343	/* do the completion and return the possible completions */
616e2162 MY	344	i = complete_cmdv(argc, argv, last_char,
616e2162 MY	345	sizeof(cmdv) / sizeof(cmdv[0]), cmdv);
04a85b3b WD	346
	347	/* no match; bell and out */
	348	if (i == 0) {
	349	if (argc > 1) /* allow tab for non command */
	350	return 0;
	351	putc('\a');
	352	return 1;
	353	}
	354
	355	s = NULL;
	356	len = 0;
	357	sep = NULL;
	358	seplen = 0;
	359	if (i == 1) { /* one match; perfect */
	360	k = strlen(argv[argc - 1]);
	361	s = cmdv[0] + k;
	362	len = strlen(s);
	363	sep = " ";
	364	seplen = 1;
616e2162	365	} else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
04a85b3b WD	366	k = strlen(argv[argc - 1]);
	367	j -= k;
	368	if (j > 0) {
	369	s = cmdv[0] + k;
	370	len = j;
	371	}
	372	}
	373
	374	if (s != NULL) {
	375	k = len + seplen;
	376	/* make sure it fits */
6d0f6bcf	377	if (n + k >= CONFIG_SYS_CBSIZE - 2) {
04a85b3b WD	378	putc('\a');
	379	return 1;
	380	}
	381
	382	t = buf + cnt;
	383	for (i = 0; i < len; i++)
	384	t++ = s++;
	385	if (sep != NULL)
	386	for (i = 0; i < seplen; i++)
	387	*t++ = sep[i];
	388	*t = '\0';
	389	n += k;
	390	col += k;
	391	puts(t - k);
	392	if (sep == NULL)
	393	putc('\a');
	394	*np = n;
	395	*colp = col;
	396	} else {
	397	print_argv(NULL, " ", " ", 78, cmdv);
	398
	399	puts(prompt);
	400	puts(buf);
	401	}
	402	return 1;
	403	}
	404
	405	#endif
8a40fb14 JCPV	406
	407	#ifdef CMD_DATA_SIZE
	408	int cmd_get_data_size(char* arg, int default_size)
	409	{
	410	/* Check for a size specification .b, .w or .l.
	411	*/
	412	int len = strlen(arg);
	413	if (len > 2 && arg[len-2] == '.') {
616e2162	414	switch (arg[len-1]) {
8a40fb14 JCPV	415	case 'b':
	416	return 1;
	417	case 'w':
	418	return 2;
	419	case 'l':
	420	return 4;
4d1fd7f1 YS	421	#ifdef CONFIG_SYS_SUPPORT_64BIT_DATA
	422	case 'q':
	423	return 8;
	424	#endif
8a40fb14 JCPV	425	case 's':
	426	return -2;
	427	default:
	428	return -1;
	429	}
	430	}
	431	return default_size;
	432	}
	433	#endif
620f1f6a	434
2e5167cc	435	#if defined(CONFIG_NEEDS_MANUAL_RELOC)
620f1f6a HS	436	DECLARE_GLOBAL_DATA_PTR;
	437
	438	void fixup_cmdtable(cmd_tbl_t *cmdtp, int size)
	439	{
	440	int i;
	441
	442	if (gd->reloc_off == 0)
	443	return;
	444
	445	for (i = 0; i < size; i++) {
	446	ulong addr;
	447
616e2162	448	addr = (ulong)(cmdtp->cmd) + gd->reloc_off;
2e88bb28	449	#ifdef DEBUG_COMMANDS
620f1f6a	450	printf("Command \"%s\": 0x%08lx => 0x%08lx\n",
616e2162	451	cmdtp->name, (ulong)(cmdtp->cmd), addr);
620f1f6a HS	452	#endif
	453	cmdtp->cmd =
	454	(int ()(struct cmd_tbl_s , int, int, char * const []))addr;
	455	addr = (ulong)(cmdtp->name) + gd->reloc_off;
	456	cmdtp->name = (char *)addr;
	457	if (cmdtp->usage) {
	458	addr = (ulong)(cmdtp->usage) + gd->reloc_off;
	459	cmdtp->usage = (char *)addr;
	460	}
	461	#ifdef CONFIG_SYS_LONGHELP
	462	if (cmdtp->help) {
	463	addr = (ulong)(cmdtp->help) + gd->reloc_off;
	464	cmdtp->help = (char *)addr;
	465	}
fa28bd2e DS	466	#endif
	467	#ifdef CONFIG_AUTO_COMPLETE
	468	if (cmdtp->complete) {
	469	addr = (ulong)(cmdtp->complete) + gd->reloc_off;
3668d8fa DS	470	cmdtp->complete =
3668d8fa DS	471	(int ()(int, char const [], char, int, char * []))addr;
fa28bd2e	472	}
620f1f6a HS	473	#endif
	474	cmdtp++;
	475	}
	476	}
	477	#endif
bdf8e34b SG	478
	479	/**
	480	* Call a command function. This should be the only route in U-Boot to call
	481	* a command, so that we can track whether we are waiting for input or
	482	* executing a command.
	483	*
	484	* @param cmdtp Pointer to the command to execute
	485	* @param flag Some flags normally 0 (see CMD_FLAG_.. above)
	486	* @param argc Number of arguments (arg 0 must be the command text)
	487	* @param argv Arguments
	488	* @return 0 if command succeeded, else non-zero (CMD_RET_...)
	489	*/
9d12d5d4	490	static int cmd_call(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
bdf8e34b SG	491	{
	492	int result;
	493
	494	result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
	495	if (result)
58b6ad68	496	debug("Command failed, result=%d\n", result);
bdf8e34b SG	497	return result;
bdf8e34b SG	498	}
9d12d5d4 SG	499
9d12d5d4 SG	500	enum command_ret_t cmd_process(int flag, int argc, char * const argv[],
34765e88	501	int repeatable, ulong ticks)
9d12d5d4 SG	502	{
	503	enum command_ret_t rc = CMD_RET_SUCCESS;
	504	cmd_tbl_t *cmdtp;
	505
	506	/* Look up command in command table */
	507	cmdtp = find_cmd(argv[0]);
	508	if (cmdtp == NULL) {
	509	printf("Unknown command '%s' - try 'help'\n", argv[0]);
	510	return 1;
	511	}
	512
	513	/* found - check max args */
	514	if (argc > cmdtp->maxargs)
	515	rc = CMD_RET_USAGE;
	516
	517	#if defined(CONFIG_CMD_BOOTD)
	518	/* avoid "bootd" recursion */
	519	else if (cmdtp->cmd == do_bootd) {
	520	if (flag & CMD_FLAG_BOOTD) {
	521	puts("'bootd' recursion detected\n");
	522	rc = CMD_RET_FAILURE;
	523	} else {
	524	flag \|= CMD_FLAG_BOOTD;
	525	}
	526	}
	527	#endif
	528
	529	/* If OK so far, then do the command */
	530	if (!rc) {
34765e88 RG	531	if (ticks)
34765e88 RG	532	*ticks = get_timer(0);
9d12d5d4	533	rc = cmd_call(cmdtp, flag, argc, argv);
34765e88 RG	534	if (ticks)
34765e88 RG	535	ticks = get_timer(ticks);
9d12d5d4 SG	536	*repeatable &= cmdtp->repeatable;
	537	}
	538	if (rc == CMD_RET_USAGE)
	539	rc = cmd_usage(cmdtp);
	540	return rc;
	541	}
16ff9902 SG	542
	543	int cmd_process_error(cmd_tbl_t *cmdtp, int err)
	544	{
	545	if (err) {
	546	printf("Command '%s' failed: Error %d\n", cmdtp->name, err);
	547	return 1;
	548	}
	549
	550	return 0;
	551	}