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

/*
 * (C) Copyright 2000-2003
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * 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>

int
do_version (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	extern char version_string[];
	printf ("\n%s\n", version_string);
	return 0;
}

U_BOOT_CMD(
	version,	1,		1,	do_version,
 	"version - print monitor version\n",
	NULL
);

int
do_echo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	int i, putnl = 1;

	for (i = 1; i < argc; i++) {
		char *p = argv[i], c;

		if (i > 1)
			putc(' ');
		while ((c = *p++) != '\0') {
			if (c == '\\' && *p == 'c') {
				putnl = 0;
				p++;
			} else {
				putc(c);
			}
		}
	}

	if (putnl)
		putc('\n');
	return 0;
}

U_BOOT_CMD(
	echo,	CFG_MAXARGS,	1,	do_echo,
 	"echo    - echo args to console\n",
 	"[args..]\n"
	"    - echo args to console; \\c suppresses newline\n"
);

#ifdef CFG_HUSH_PARSER

int
do_test (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	char **ap;
	int left, adv, expr, last_expr, neg, last_cmp;

	/* args? */
	if (argc < 3)
		return 1;

#if 0
	{
		printf("test:");
		left = 1;
		while (argv[left])
			printf(" %s", argv[left++]);
	}
#endif

	last_expr = 0;
	left = argc - 1; ap = argv + 1;
	if (left > 0 && strcmp(ap[0], "!") == 0) {
		neg = 1;
		ap++;
		left--;
	} else
		neg = 0;

	expr = -1;
	last_cmp = -1;
	last_expr = -1;
	while (left > 0) {

		if (strcmp(ap[0], "-o") == 0 || strcmp(ap[0], "-a") == 0)
			adv = 1;
		else if (strcmp(ap[0], "-z") == 0 || strcmp(ap[0], "-n") == 0)
			adv = 2;
		else
			adv = 3;

		if (left < adv) {
			expr = 1;
			break;
		}

		if (adv == 1) {
			if (strcmp(ap[0], "-o") == 0) {
				last_expr = expr;
				last_cmp = 0;
			} else if (strcmp(ap[0], "-a") == 0) {
				last_expr = expr;
				last_cmp = 1;
			} else {
				expr = 1;
				break;
			}
		}

		if (adv == 2) {
			if (strcmp(ap[0], "-z") == 0)
				expr = strlen(ap[1]) == 0 ? 1 : 0;
			else if (strcmp(ap[0], "-n") == 0)
				expr = strlen(ap[1]) == 0 ? 0 : 1;
			else {
				expr = 1;
				break;
			}

			if (last_cmp == 0)
				expr = last_expr || expr;
			else if (last_cmp == 1)
				expr = last_expr && expr;
			last_cmp = -1;
		}

		if (adv == 3) {
			if (strcmp(ap[1], "=") == 0)
				expr = strcmp(ap[0], ap[2]) == 0;
			else if (strcmp(ap[1], "!=") == 0)
				expr = strcmp(ap[0], ap[2]) != 0;
			else if (strcmp(ap[1], ">") == 0)
				expr = strcmp(ap[0], ap[2]) > 0;
			else if (strcmp(ap[1], "<") == 0)
				expr = strcmp(ap[0], ap[2]) < 0;
			else if (strcmp(ap[1], "-eq") == 0)
				expr = simple_strtol(ap[0], NULL, 10) == simple_strtol(ap[2], NULL, 10);
			else if (strcmp(ap[1], "-ne") == 0)
				expr = simple_strtol(ap[0], NULL, 10) != simple_strtol(ap[2], NULL, 10);
			else if (strcmp(ap[1], "-lt") == 0)
				expr = simple_strtol(ap[0], NULL, 10) < simple_strtol(ap[2], NULL, 10);
			else if (strcmp(ap[1], "-le") == 0)
				expr = simple_strtol(ap[0], NULL, 10) <= simple_strtol(ap[2], NULL, 10);
			else if (strcmp(ap[1], "-gt") == 0)
				expr = simple_strtol(ap[0], NULL, 10) > simple_strtol(ap[2], NULL, 10);
			else if (strcmp(ap[1], "-ge") == 0)
				expr = simple_strtol(ap[0], NULL, 10) >= simple_strtol(ap[2], NULL, 10);
			else {
				expr = 1;
				break;
			}

			if (last_cmp == 0)
				expr = last_expr || expr;
			else if (last_cmp == 1)
				expr = last_expr && expr;
			last_cmp = -1;
		}

		ap += adv; left -= adv;
	}

	if (neg)
		expr = !expr;

	expr = !expr;

#if 0
	printf(": returns %d\n", expr);
#endif

	return expr;
}

U_BOOT_CMD(
	test,	CFG_MAXARGS,	1,	do_test,
 	"test    - minimal test like /bin/sh\n",
 	"[args..]\n"
	"    - test functionality\n"
);

int
do_exit (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	int r;

	r = 0;
	if (argc > 1)
		r = simple_strtoul(argv[1], NULL, 10);

	return -r - 2;
}

U_BOOT_CMD(
	exit,	2,	1,	do_exit,
 	"exit    - exit script\n",
	"    - exit functionality\n"
);


#endif

/*
 * Use puts() instead of printf() to avoid printf buffer overflow
 * for long help messages
 */
int do_help (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	int i;
	int rcode = 0;

	if (argc == 1) {	/*show list of commands */

		int cmd_items = &__u_boot_cmd_end -
				&__u_boot_cmd_start;	/* pointer arith! */
		cmd_tbl_t *cmd_array[cmd_items];
		int i, j, swaps;

		/* Make array of commands from .uboot_cmd section */
		cmdtp = &__u_boot_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;
			puts (usage);
		}
		return 0;
	}
	/*
	 * command help (long version)
	 */
	for (i = 1; i < argc; ++i) {
		if ((cmdtp = find_cmd (argv[i])) != NULL) {
#ifdef	CFG_LONGHELP
			/* found - print (long) help info */
			puts (cmdtp->name);
			putc (' ');
			if (cmdtp->help) {
				puts (cmdtp->help);
			} else {
				puts ("- No help available.\n");
				rcode = 1;
			}
			putc ('\n');
#else	/* no long help available */
			if (cmdtp->usage)
				puts (cmdtp->usage);
#endif	/* CFG_LONGHELP */
		} else {
			printf ("Unknown command '%s' - try 'help'"
				" without arguments for list of all"
				" known commands\n\n", argv[i]
					);
			rcode = 1;
		}
	}
	return rcode;
}


U_BOOT_CMD(
	help,	CFG_MAXARGS,	1,	do_help,
 	"help    - print online help\n",
 	"[command ...]\n"
 	"    - show help information (for 'command')\n"
 	"'help' prints online help for the monitor commands.\n\n"
 	"Without arguments, it prints a short usage message for all commands.\n\n"
 	"To get detailed help information for specific commands you can type\n"
  "'help' with one or more command names as arguments.\n"
);

/* This do not ust the U_BOOT_CMD macro as ? can't be used in symbol names */
#ifdef  CFG_LONGHELP
cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
	"?",	CFG_MAXARGS,	1,	do_help,
 	"?       - alias for 'help'\n",
	NULL
};
#else
cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
	"?",	CFG_MAXARGS,	1,	do_help,
 	"?       - alias for 'help'\n"
};
#endif /* CFG_LONGHELP */

/***************************************************************************
 * find command table entry for a command
 */
cmd_tbl_t *find_cmd (const char *cmd)
{
	cmd_tbl_t *cmdtp;
	cmd_tbl_t *cmdtp_temp = &__u_boot_cmd_start;	/*Init value */
	const char *p;
	int len;
	int n_found = 0;

	/*
	 * 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 = &__u_boot_cmd_start;
	     cmdtp != &__u_boot_cmd_end;
	     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 */
}

#ifdef CONFIG_AUTO_COMPLETE

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

	space = last_char == '\0' || last_char == ' ' || last_char == '\t';

	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 void install_auto_complete_handler(const char *cmd,
		int (*complete)(int argc, char *argv[], char last_char, int maxv, char *cmdv[]))
{
	cmd_tbl_t *cmdtp;

	cmdtp = find_cmd(cmd);
	if (cmdtp == NULL)
		return;

	cmdtp->complete = complete;
}

void install_auto_complete(void)
{
	install_auto_complete_handler("printenv", var_complete);
	install_auto_complete_handler("setenv", var_complete);
#if (CONFIG_COMMANDS & CFG_CMD_RUN)
	install_auto_complete_handler("run", var_complete);
#endif
}

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

static int complete_cmdv(int argc, char *argv[], char last_char, int maxv, char *cmdv[])
{
	cmd_tbl_t *cmdtp;
	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 = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; 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' || last_char == ' ' || last_char == '\t')) {
		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 = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; 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 ((*s == ' ') || (*s == '\t'))
			++s;

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

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

		/* find end of string */
		while (*s && (*s != ' ') && (*s != '\t'))
			++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 *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 *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[CFG_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[CFG_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, CFG_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 >= CFG_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
Commit	Line	Data
5dfa25f2	1	/*
8bde7f77	2	* (C) Copyright 2000-2003
5dfa25f2 WD	3	* Wolfgang Denk, DENX Software Engineering, [email protected].
	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>
5dfa25f2 WD	30
	31	int
	32	do_version (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
	33	{
	34	extern char version_string[];
	35	printf ("\n%s\n", version_string);
	36	return 0;
	37	}
	38
0d498393 WD	39	U_BOOT_CMD(
0d498393 WD	40	version, 1, 1, do_version,
b0fce99b WD	41	"version - print monitor version\n",
	42	NULL
	43	);
	44
5dfa25f2 WD	45	int
	46	do_echo (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
	47	{
	48	int i, putnl = 1;
	49
	50	for (i = 1; i < argc; i++) {
	51	char *p = argv[i], c;
	52
	53	if (i > 1)
	54	putc(' ');
71f95118	55	while ((c = *p++) != '\0') {
5dfa25f2 WD	56	if (c == '\\' && *p == 'c') {
	57	putnl = 0;
	58	p++;
71f95118	59	} else {
5dfa25f2	60	putc(c);
71f95118 WD	61	}
71f95118 WD	62	}
5dfa25f2 WD	63	}
	64
	65	if (putnl)
	66	putc('\n');
	67	return 0;
	68	}
	69
0d498393 WD	70	U_BOOT_CMD(
0d498393 WD	71	echo, CFG_MAXARGS, 1, do_echo,
b0fce99b WD	72	"echo - echo args to console\n",
	73	"[args..]\n"
	74	" - echo args to console; \\c suppresses newline\n"
	75	);
	76
c26e454d WD	77	#ifdef CFG_HUSH_PARSER
	78
	79	int
	80	do_test (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
	81	{
	82	char **ap;
	83	int left, adv, expr, last_expr, neg, last_cmp;
	84
	85	/* args? */
	86	if (argc < 3)
	87	return 1;
	88
	89	#if 0
	90	{
	91	printf("test:");
6e592385	92	left = 1;
c26e454d WD	93	while (argv[left])
	94	printf(" %s", argv[left++]);
	95	}
	96	#endif
6e592385	97
c26e454d WD	98	last_expr = 0;
	99	left = argc - 1; ap = argv + 1;
	100	if (left > 0 && strcmp(ap[0], "!") == 0) {
	101	neg = 1;
	102	ap++;
	103	left--;
	104	} else
	105	neg = 0;
	106
	107	expr = -1;
	108	last_cmp = -1;
	109	last_expr = -1;
	110	while (left > 0) {
	111
	112	if (strcmp(ap[0], "-o") == 0 \|\| strcmp(ap[0], "-a") == 0)
	113	adv = 1;
	114	else if (strcmp(ap[0], "-z") == 0 \|\| strcmp(ap[0], "-n") == 0)
	115	adv = 2;
	116	else
	117	adv = 3;
	118
	119	if (left < adv) {
	120	expr = 1;
	121	break;
	122	}
	123
	124	if (adv == 1) {
	125	if (strcmp(ap[0], "-o") == 0) {
	126	last_expr = expr;
	127	last_cmp = 0;
	128	} else if (strcmp(ap[0], "-a") == 0) {
	129	last_expr = expr;
	130	last_cmp = 1;
	131	} else {
	132	expr = 1;
	133	break;
	134	}
	135	}
	136
	137	if (adv == 2) {
	138	if (strcmp(ap[0], "-z") == 0)
c26e454d	139	expr = strlen(ap[1]) == 0 ? 1 : 0;
20787e23 WD	140	else if (strcmp(ap[0], "-n") == 0)
20787e23 WD	141	expr = strlen(ap[1]) == 0 ? 0 : 1;
c26e454d WD	142	else {
	143	expr = 1;
	144	break;
	145	}
	146
	147	if (last_cmp == 0)
	148	expr = last_expr \|\| expr;
	149	else if (last_cmp == 1)
	150	expr = last_expr && expr;
	151	last_cmp = -1;
	152	}
	153
	154	if (adv == 3) {
	155	if (strcmp(ap[1], "=") == 0)
	156	expr = strcmp(ap[0], ap[2]) == 0;
	157	else if (strcmp(ap[1], "!=") == 0)
	158	expr = strcmp(ap[0], ap[2]) != 0;
	159	else if (strcmp(ap[1], ">") == 0)
	160	expr = strcmp(ap[0], ap[2]) > 0;
	161	else if (strcmp(ap[1], "<") == 0)
	162	expr = strcmp(ap[0], ap[2]) < 0;
	163	else if (strcmp(ap[1], "-eq") == 0)
	164	expr = simple_strtol(ap[0], NULL, 10) == simple_strtol(ap[2], NULL, 10);
	165	else if (strcmp(ap[1], "-ne") == 0)
	166	expr = simple_strtol(ap[0], NULL, 10) != simple_strtol(ap[2], NULL, 10);
	167	else if (strcmp(ap[1], "-lt") == 0)
	168	expr = simple_strtol(ap[0], NULL, 10) < simple_strtol(ap[2], NULL, 10);
	169	else if (strcmp(ap[1], "-le") == 0)
	170	expr = simple_strtol(ap[0], NULL, 10) <= simple_strtol(ap[2], NULL, 10);
	171	else if (strcmp(ap[1], "-gt") == 0)
	172	expr = simple_strtol(ap[0], NULL, 10) > simple_strtol(ap[2], NULL, 10);
	173	else if (strcmp(ap[1], "-ge") == 0)
	174	expr = simple_strtol(ap[0], NULL, 10) >= simple_strtol(ap[2], NULL, 10);
	175	else {
	176	expr = 1;
	177	break;
	178	}
	179
	180	if (last_cmp == 0)
	181	expr = last_expr \|\| expr;
	182	else if (last_cmp == 1)
	183	expr = last_expr && expr;
	184	last_cmp = -1;
	185	}
	186
	187	ap += adv; left -= adv;
	188	}
	189
	190	if (neg)
	191	expr = !expr;
	192
	193	expr = !expr;
	194
	195	#if 0
	196	printf(": returns %d\n", expr);
	197	#endif
	198
	199	return expr;
	200	}
	201
	202	U_BOOT_CMD(
	203	test, CFG_MAXARGS, 1, do_test,
	204	"test - minimal test like /bin/sh\n",
	205	"[args..]\n"
206	" - test functionality\n"
207	);
208
209	int
210	do_exit (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
211	{
212	int r;
213
214	r = 0;
215	if (argc > 1)
216	r = simple_strtoul(argv[1], NULL, 10);
217
218	return -r - 2;
219	}
220
221	U_BOOT_CMD(
222	exit, 2, 1, do_exit,
223	"exit - exit script\n",
224	" - exit functionality\n"
225	);
226
227
228	#endif
229
5dfa25f2 WD	230	/*
	231	* Use puts() instead of printf() to avoid printf buffer overflow
	232	* for long help messages
	233	*/
8bde7f77	234	int do_help (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
5dfa25f2 WD	235	{
	236	int i;
	237	int rcode = 0;
	238
8bde7f77 WD	239	if (argc == 1) { /show list of commands /
8bde7f77 WD	240
9d2b18a0 WD	241	int cmd_items = &__u_boot_cmd_end -
	242	&__u_boot_cmd_start; /* pointer arith! */
	243	cmd_tbl_t *cmd_array[cmd_items];
	244	int i, j, swaps;
	245
	246	/* Make array of commands from .uboot_cmd section */
	247	cmdtp = &__u_boot_cmd_start;
	248	for (i = 0; i < cmd_items; i++) {
	249	cmd_array[i] = cmdtp++;
8bde7f77	250	}
8bde7f77	251
9d2b18a0 WD	252	/* Sort command list (trivial bubble sort) */
	253	for (i = cmd_items - 1; i > 0; --i) {
	254	swaps = 0;
	255	for (j = 0; j < i; ++j) {
	256	if (strcmp (cmd_array[j]->name,
	257	cmd_array[j + 1]->name) > 0) {
	258	cmd_tbl_t *tmp;
	259	tmp = cmd_array[j];
	260	cmd_array[j] = cmd_array[j + 1];
	261	cmd_array[j + 1] = tmp;
	262	++swaps;
	263	}
8bde7f77	264	}
9d2b18a0 WD	265	if (!swaps)
9d2b18a0 WD	266	break;
8bde7f77	267	}
5dfa25f2	268
8bde7f77	269	/* print short help (usage) */
9d2b18a0 WD	270	for (i = 0; i < cmd_items; i++) {
	271	const char *usage = cmd_array[i]->usage;
	272
5dfa25f2	273	/* allow user abort */
8bde7f77	274	if (ctrlc ())
5dfa25f2	275	return 1;
9d2b18a0	276	if (usage == NULL)
5dfa25f2	277	continue;
9d2b18a0	278	puts (usage);
5dfa25f2	279	}
5dfa25f2 WD	280	return 0;
5dfa25f2 WD	281	}
5dfa25f2 WD	282	/*
	283	* command help (long version)
	284	*/
8bde7f77 WD	285	for (i = 1; i < argc; ++i) {
8bde7f77 WD	286	if ((cmdtp = find_cmd (argv[i])) != NULL) {
5dfa25f2 WD	287	#ifdef CFG_LONGHELP
	288	/* found - print (long) help info */
	289	puts (cmdtp->name);
	290	putc (' ');
	291	if (cmdtp->help) {
	292	puts (cmdtp->help);
	293	} else {
	294	puts ("- No help available.\n");
	295	rcode = 1;
	296	}
	297	putc ('\n');
	298	#else /* no long help available */
	299	if (cmdtp->usage)
	300	puts (cmdtp->usage);
	301	#endif /* CFG_LONGHELP */
71f95118	302	} else {
5dfa25f2 WD	303	printf ("Unknown command '%s' - try 'help'"
5dfa25f2 WD	304	" without arguments for list of all"
8bde7f77 WD	305	" known commands\n\n", argv[i]
8bde7f77 WD	306	);
5dfa25f2 WD	307	rcode = 1;
	308	}
	309	}
	310	return rcode;
	311	}
	312
8bde7f77	313
0d498393 WD	314	U_BOOT_CMD(
0d498393 WD	315	help, CFG_MAXARGS, 1, do_help,
8bde7f77 WD	316	"help - print online help\n",
	317	"[command ...]\n"
	318	" - show help information (for 'command')\n"
	319	"'help' prints online help for the monitor commands.\n\n"
	320	"Without arguments, it prints a short usage message for all commands.\n\n"
	321	"To get detailed help information for specific commands you can type\n"
	322	"'help' with one or more command names as arguments.\n"
	323	);
	324
0d498393 WD	325	/* This do not ust the U_BOOT_CMD macro as ? can't be used in symbol names */
	326	#ifdef CFG_LONGHELP
	327	cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
8bde7f77 WD	328	"?", CFG_MAXARGS, 1, do_help,
	329	"? - alias for 'help'\n",
	330	NULL
0d498393 WD	331	};
	332	#else
	333	cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
	334	"?", CFG_MAXARGS, 1, do_help,
	335	"? - alias for 'help'\n"
	336	};
	337	#endif /* CFG_LONGHELP */
8bde7f77	338
5dfa25f2 WD	339	/***************************************************************************
	340	* find command table entry for a command
	341	*/
8bde7f77	342	cmd_tbl_t find_cmd (const char cmd)
5dfa25f2 WD	343	{
5dfa25f2 WD	344	cmd_tbl_t *cmdtp;
8bde7f77	345	cmd_tbl_t cmdtp_temp = &__u_boot_cmd_start; /Init value */
9d2b18a0 WD	346	const char *p;
	347	int len;
	348	int n_found = 0;
	349
	350	/*
	351	* Some commands allow length modifiers (like "cp.b");
	352	* compare command name only until first dot.
	353	*/
	354	len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
	355
	356	for (cmdtp = &__u_boot_cmd_start;
	357	cmdtp != &__u_boot_cmd_end;
	358	cmdtp++) {
	359	if (strncmp (cmd, cmdtp->name, len) == 0) {
	360	if (len == strlen (cmdtp->name))
	361	return cmdtp; /* full match */
	362
	363	cmdtp_temp = cmdtp; /* abbreviated command ? */
	364	n_found++;
	365	}
5dfa25f2	366	}
9d2b18a0	367	if (n_found == 1) { /* exactly one match */
8bde7f77	368	return cmdtp_temp;
9d2b18a0	369	}
5dfa25f2	370
9d2b18a0	371	return NULL; /* not found or ambiguous command */
8bde7f77	372	}
04a85b3b WD	373
	374	#ifdef CONFIG_AUTO_COMPLETE
	375
	376	int var_complete(int argc, char argv[], char last_char, int maxv, char cmdv[])
	377	{
	378	static char tmp_buf[512];
	379	int space;
	380
	381	space = last_char == '\0' \|\| last_char == ' ' \|\| last_char == '\t';
	382
	383	if (space && argc == 1)
	384	return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
	385
	386	if (!space && argc == 2)
	387	return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
	388
	389	return 0;
	390	}
	391
	392	static void install_auto_complete_handler(const char *cmd,
	393	int (complete)(int argc, char argv[], char last_char, int maxv, char *cmdv[]))
	394	{
	395	cmd_tbl_t *cmdtp;
	396
	397	cmdtp = find_cmd(cmd);
	398	if (cmdtp == NULL)
	399	return;
	400
	401	cmdtp->complete = complete;
	402	}
	403
	404	void install_auto_complete(void)
	405	{
	406	install_auto_complete_handler("printenv", var_complete);
	407	install_auto_complete_handler("setenv", var_complete);
	408	#if (CONFIG_COMMANDS & CFG_CMD_RUN)
	409	install_auto_complete_handler("run", var_complete);
	410	#endif
	411	}
	412
	413	/*************************************************************************************/
	414
	415	static int complete_cmdv(int argc, char argv[], char last_char, int maxv, char cmdv[])
	416	{
	417	cmd_tbl_t *cmdtp;
	418	const char *p;
	419	int len, clen;
	420	int n_found = 0;
	421	const char *cmd;
	422
	423	/* sanity? */
	424	if (maxv < 2)
	425	return -2;
	426
	427	cmdv[0] = NULL;
	428
	429	if (argc == 0) {
	430	/* output full list of commands */
	431	for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
	432	if (n_found >= maxv - 2) {
	433	cmdv[n_found++] = "...";
	434	break;
	435	}
	436	cmdv[n_found++] = cmdtp->name;
437	}
438	cmdv[n_found] = NULL;
439	return n_found;
440	}
441
442	/* more than one arg or one but the start of the next */
443	if (argc > 1 \|\| (last_char == '\0' \|\| last_char == ' ' \|\| last_char == '\t')) {
444	cmdtp = find_cmd(argv[0]);
445	if (cmdtp == NULL \|\| cmdtp->complete == NULL) {
446	cmdv[0] = NULL;
447	return 0;
448	}
449	return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
450	}
451
452	cmd = argv[0];
453	/*
454	* Some commands allow length modifiers (like "cp.b");
455	* compare command name only until first dot.
456	*/
457	p = strchr(cmd, '.');
458	if (p == NULL)
459	len = strlen(cmd);
460	else
461	len = p - cmd;
462
463	/* return the partial matches */
464	for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
465
466	clen = strlen(cmdtp->name);
467	if (clen < len)
468	continue;
469
470	if (memcmp(cmd, cmdtp->name, len) != 0)
471	continue;
472
473	/* too many! */
474	if (n_found >= maxv - 2) {
475	cmdv[n_found++] = "...";
476	break;
477	}
478
479	cmdv[n_found++] = cmdtp->name;
480	}
481
482	cmdv[n_found] = NULL;
483	return n_found;
484	}
485
486	static int make_argv(char s, int argvsz, char argv[])
487	{
488	int argc = 0;
489
490	/* split into argv */
491	while (argc < argvsz - 1) {
492
493	/* skip any white space */
494	while ((s == ' ') \|\| (s == '\t'))
495	++s;
496
497	if (s == '\0') / end of s, no more args */
498	break;
499
500	argv[argc++] = s; /* begin of argument string */
501
502	/* find end of string */
503	while (s && (s != ' ') && (*s != '\t'))
504	++s;
505
506	if (s == '\0') / end of s, no more args */
507	break;
508
509	s++ = '\0'; / terminate current arg */
510	}
511	argv[argc] = NULL;
512
513	return argc;
514	}
515
516	static void print_argv(const char banner, const char leader, const char sep, int linemax, char argv[])
517	{
518	int ll = leader != NULL ? strlen(leader) : 0;
519	int sl = sep != NULL ? strlen(sep) : 0;
520	int len, i;
521
522	if (banner) {
523	puts("\n");
524	puts(banner);
525	}
526
527	i = linemax; /* force leader and newline */
528	while (*argv != NULL) {
529	len = strlen(*argv) + sl;
530	if (i + len >= linemax) {
531	puts("\n");
532	if (leader)
533	puts(leader);
534	i = ll - sl;
535	} else if (sep)
536	puts(sep);
537	puts(*argv++);
538	i += len;
539	}
540	printf("\n");
541	}
542
543	static int find_common_prefix(char *argv[])
544	{
545	int i, len;
546	char anchor, s, *t;
547
548	if (*argv == NULL)
549	return 0;
550
551	/* begin with max */
552	anchor = *argv++;
553	len = strlen(anchor);
554	while ((t = *argv++) != NULL) {
555	s = anchor;
556	for (i = 0; i < len; i++, t++, s++) {
557	if (t != s)
558	break;
559	}
560	len = s - anchor;
561	}
562	return len;
563	}
564
565	static char tmp_buf[CFG_CBSIZE]; /* copy of console I/O buffer */
566
567	int cmd_auto_complete(const char const prompt, char buf, int np, int colp)
568	{
569	int n = np, col = colp;
570	char argv[CFG_MAXARGS + 1]; / NULL terminated */
571	char *cmdv[20];
572	char s, t;
573	const char *sep;
574	int i, j, k, len, seplen, argc;
575	int cnt;
576	char last_char;
577
578	if (strcmp(prompt, CFG_PROMPT) != 0)
579	return 0; /* not in normal console */
580
581	cnt = strlen(buf);
582	if (cnt >= 1)
583	last_char = buf[cnt - 1];
584	else
585	last_char = '\0';
586
587	/* copy to secondary buffer which will be affected */
588	strcpy(tmp_buf, buf);
589
590	/* separate into argv */
591	argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
592
593	/* do the completion and return the possible completions */
594	i = complete_cmdv(argc, argv, last_char, sizeof(cmdv)/sizeof(cmdv[0]), cmdv);
595
596	/* no match; bell and out */
597	if (i == 0) {
598	if (argc > 1) /* allow tab for non command */
599	return 0;
600	putc('\a');
601	return 1;
602	}
603
604	s = NULL;
605	len = 0;
606	sep = NULL;
607	seplen = 0;
608	if (i == 1) { /* one match; perfect */
609	k = strlen(argv[argc - 1]);
610	s = cmdv[0] + k;
611	len = strlen(s);
612	sep = " ";
613	seplen = 1;
614	} else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
615	k = strlen(argv[argc - 1]);
616	j -= k;
617	if (j > 0) {
618	s = cmdv[0] + k;
619	len = j;
620	}
621	}
622
623	if (s != NULL) {
624	k = len + seplen;
625	/* make sure it fits */
626	if (n + k >= CFG_CBSIZE - 2) {
627	putc('\a');
628	return 1;
629	}
630
631	t = buf + cnt;
632	for (i = 0; i < len; i++)
633	t++ = s++;
634	if (sep != NULL)
635	for (i = 0; i < seplen; i++)
636	*t++ = sep[i];
637	*t = '\0';
638	n += k;
639	col += k;
640	puts(t - k);
641	if (sep == NULL)
642	putc('\a');
643	*np = n;
644	*colp = col;
645	} else {
646	print_argv(NULL, " ", " ", 78, cmdv);
647
648	puts(prompt);
649	puts(buf);
650	}
651	return 1;
652	}
653
654	#endif