common/command.c - github/trini/u-boot - Gitiles

 /*
  * (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)
 {
 #ifdef CONFIG_CMDLINE
 	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;
 	}
 #endif /* CONFIG_CMDLINE */

 	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[])
 {
 #ifdef CONFIG_CMDLINE
 	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;
 #else
 	return 0;
 #endif
 }

 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;
 }
	/*
	* (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)
	{
	#ifdef CONFIG_CMDLINE
	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;
	}
	#endif /* CONFIG_CMDLINE */

	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[])
	{
	#ifdef CONFIG_CMDLINE
	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;
	#else
	return 0;
	#endif
	}

	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;
	}