[z180-stamp.git] / avr / cli.c

/*
 * (C) Copyright 2014-2016 Leo C. <erbl259-lmu@yahoo.de>
 *
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * Add to readline cmdline-editing by
 * (C) Copyright 2005
 * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
 *
 * SPDX-License-Identifier:	GPL-2.0
 */

#include "cli.h"
#include "common.h"

#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <stdio.h>

#include "config.h"
#include "command.h"
#include "xmalloc.h"
#include "debug.h"
#include "env.h"
#include "cli_readline.h"
#include "con-utils.h"


/* FIXME: Quoting problems */

#define DEBUG_PARSER	0	/* set to 1 to debug */

#define debug_parser(fmt, args...)		\
	debug_cond(DEBUG_PARSER, fmt, ##args)


static bool opt_xtrace;
static bool opt_verbose;
static int_least8_t command_level;

static void cli_trace_cmd(int_fast8_t level, int argc, char *argv[])
{
	while (level-- > 0)
		putchar('+');
	for (int_fast8_t i = 0; i < argc; i++)
		printf_P(PSTR(" %s"), argv[i]);
	putchar('\n');
}


static int cli_parse_line(char *line, char *argv[])
{
	uint_fast8_t state = 0;
	uint_fast8_t nargs = 0;
	char *inp, *outp;
	char c, quote;

	debug_parser("%s: \"%s\"\n", __func__, line);

	for (outp = inp = line, quote = '\0'; (c = *inp) != '\0'; inp++) {

		switch (state) {
		case 0:						/* before arg string, waiting for arg start */
			if (isblank(c))
				continue;

			argv[nargs++] = inp;	/* begin of argument string	*/
			outp = inp;
			state = 1;
			/* fall thru */

		case 1:						/* in arg string, waiting for end of arg string */
			if (c == '\\') {
				++state;
				continue;
			}
			if (c == '\"' || c == '\'') {
				quote = c;
				state = 3;
				continue;
			}
			if (isblank(c)) {
				c = '\0';
				state = 0;
			}
			break;

		case 3:						/* in quote */
			if (c == '\\' && quote == '\"') {
				++state;
				continue;
			}
			if (c == quote) {
				state = 1;
				continue;
			}
			break;

		case 2:						/* waiting for next char */
		case 4:
			--state;
			break;

		}

		if (nargs > CONFIG_SYS_MAXARGS) {
			--nargs;
			break;
		}
		*outp++ = c;
	}

	if (*inp != '\0')
		printf_P(PSTR("** Too many args (max. %d) **\n"), CONFIG_SYS_MAXARGS);

	*outp = '\0';
	argv[nargs] = NULL;
	debug_parser("%s: nargs=%d\n", __func__, nargs);
#if 0
	for (int i = 0; i < nargs; i++)
		debug_parser("%s: arg %d: >%s<\n", __func__, i, argv[i]);
#endif
	return nargs;

}

static
void append_char(uint_fast8_t pass, char **p, char c)
{

	if (pass) {
		**p = c;
	}
	++(*p);
}

static
char *process_macros(char *input, char *output)
{
	char c, prev, *inp, *outp;
	const char *varname = NULL;

	for(uint_fast8_t pass = 0; pass < 2; pass++)
	{
		uint_fast8_t state = 0;
		/* 0 = waiting for '$'  */
		/* 1 = waiting for '{' */
		/* 2 = waiting for '}' */
		/* 3 = waiting for ''' */

		if (pass == 0) {
			outp = output;
		} else {
			int outputlen = outp - output;
			outp = xrealloc(output, outputlen);
			output = outp;
		}

		inp = input;

		debug_parser("[PROCESS_MACROS] INPUT len %d: \"%s\"\n",
						strlen(inp), inp);

		for (prev = '\0'; (c = *inp++) != '\0'; prev = c) {


			switch (state) {
			case 0:	/* Waiting for (unescaped) $    */
				if ((c == '\'') && (prev != '\\')) {
					state = 3;
					break;
				}
				if ((c == '$') && (prev != '\\')) {
					state++;
					continue;
				}
				break;
			case 1:	/* Waiting for {        */
				if (c == '{') {
					state++;
					varname = inp;
					continue;
				} else {
					state = 0;
					append_char(pass, &outp, '$');
				}
				break;
			case 2:	/* Waiting for }        */
				if (c == '}') {
					/* Terminate variable name */
					*(inp-1) = '\0';
					const char *envval = getenv_str(varname);
					*(inp-1) = '}';
					/* Copy into the line if it exists */
					if (envval != NULL)
						while (*envval)
							append_char(pass, &outp, *(envval++));
					/* Look for another '$' */
					state = 0;
				}
				continue;
			case 3:	/* Waiting for '        */
				if (c == '\'')
					state = 0;
				break;
			}
			append_char(pass, &outp, c);
		}

		append_char(pass, &outp, 0);
	}

	debug_parser("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
		     strlen(output), output);

	return output;
}

/**
 *
 *
 * WARNING:
 *
 * We must create a temporary copy of the command since the command we get
 * may be the result from getenv_str(), which returns a pointer directly to
 * the environment data, which may change magicly when the command we run
 * creates or modifies environment variables (like "bootp" does).
 *
 *
 * @param cmd
 * @param flag
 * @returns
 *
 */
static int cli_run_command(const char *cmd, int flag)
{
	char *cmdbuf;			/* working copy of cmd		*/
	char *token;			/* start of token in cmdbuf	*/
	char *sep;			/* end of token (separator) in cmdbuf */
	char *finaltoken = NULL;	/* token after macro expansion	*/
	char *str;
	char *argv[CONFIG_SYS_MAXARGS + 1];	/* NULL terminated	*/
	int argc;
	uint_fast8_t inquotes, repeatable = 1;
	int rc = 0;

	opt_verbose = 0;
	opt_xtrace = 0;
	char *optenv = getenv_str(PSTR("cli"));
	if (optenv) {
		opt_verbose = (strstr_P(optenv, PSTR("verbose")) != NULL);
		opt_xtrace = (strstr_P(optenv, PSTR("xtrace")) != NULL);
	}

	debug_parser("[RUN_COMMAND] cmd[%p]=\"%s\"\n",
			cmd, cmd ? cmd : "NULL");

	if (opt_verbose)
		printf_P(PSTR("%s\n"), cmd, cmd ? cmd : "");

	clear_ctrlc();		/* forget any previous Control C */

	if (!cmd || !*cmd)
		return -1;	/* empty command */

	cmdbuf = strdup(cmd);
	if (!cmdbuf)
		return -1;	/* not enough memory */

	++command_level;
	str = cmdbuf;

	/* Process separators and check for invalid
	 * repeatable commands
	 */

	debug_parser("[PROCESS_SEPARATORS] %s\n", cmd);
	while (*str) {
		/*
		 * Find separator, or string end
		 * Allow simple escape of ';' by writing "\;"
		 */
		for (inquotes = 0, sep = str; *sep; sep++) {
			if ((*sep == '\'') &&
			    (sep != str) &&					/* past string start */
			    (*(sep - 1) != '\\'))			/* and NOT escaped */
				inquotes = !inquotes;

			if (!inquotes &&
			    (*sep == ';' || *sep == '\n'	/* separator */
					|| *sep == '#') &&			/*   or start of comment */
			    ((sep == str) ||				/* string start */
			    (*(sep - 1) != '\\')))			/*   or NOT escaped */
				break;
		}

		/* no more commands after unescaped '#' token */
		if (*sep == '#')
			*sep = '\0';

		/* Limit the token to data between separators */
		token = str;
		if (*sep) {
			str = sep + 1;		/* start of command for next pass */
			*sep = '\0';
		} else {
			str = sep;			/* no more commands for next pass */
		}
		debug_parser("token: \"%s\"\n", token);

		/* find macros in this token and replace them */
		finaltoken = process_macros(token, finaltoken);

		/* Extract arguments */
		argc = cli_parse_line(finaltoken, argv);
		if (argc == 0) {
			//rc = -1;
			continue; /* no command at all */
		}

		if (opt_xtrace)
			cli_trace_cmd(command_level, argc, argv);

		rc = cmd_process(flag, argc, argv, &repeatable);
		if (rc != CMD_RET_SUCCESS) {
			if (opt_verbose)
				printf_P(PSTR("Command failed, result=%d\n"), rc);
			rc = -1;
		}

		/* Did the user stop this? */
		if (had_ctrlc()) {
			rc = -1;	/* if stopped then not repeatable */
			break;
		}
	}

	free(cmdbuf);
	free(finaltoken);
	--command_level;

	return rc ? rc : repeatable;
}

static int cli_run_command_list(const char *cmd)
{
	return (cli_run_command(cmd, 0) < 0);
}

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


/*
 * Run a command.
 *
 * @param cmd	Command to run
 * @param flag	Execution flags (CMD_FLAG_...)
 * @return 0 on success, or != 0 on error.
 */
int run_command(const char *cmd, int flag)
{
	/*
	 * cli_run_command can return 0 or 1 for success, so clean up
	 * its result.
	 */
	if (cli_run_command(cmd, flag) == -1)
		return 1;

	return 0;
}

/*
 * Run a command using the selected parser, and check if it is repeatable.
 *
 * @param cmd	Command to run
 * @param flag	Execution flags (CMD_FLAG_...)
 * @return 0 (not repeatable) or 1 (repeatable) on success, -1 on error.
 */
static int run_command_repeatable(const char *cmd, int flag)
{
	return cli_run_command(cmd, flag);
}

int run_command_list(const char *cmd, int len)
{
	(void) len;

	return cli_run_command_list(cmd);
}

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


void cli_loop(void)
{
	char *lastcommand = NULL;
	int len;
	int flag;
	int rc = 1;

	for (;;) {
		len = cli_readline(lastcommand ? PSTR(CONFIG_SYS_PROMPT_REPEAT) : PSTR(CONFIG_SYS_PROMPT), 1);

		flag = 0;	/* assume no special flags for now */
		if (len > 0) {
			free (lastcommand);
			lastcommand = strdup(console_buffer);
		} else if (len == 0)
			flag |= CMD_FLAG_REPEAT;

		if (len == -1) {
			if (opt_verbose)
				my_puts_P(PSTR("<INTERRUPT>\n"));
		} else
			rc = run_command_repeatable(lastcommand, flag);

		if (rc <= 0) {
			/* invalid command or not repeatable, forget it */
			free(lastcommand);
			lastcommand = NULL;
		}
	}
}
Commit	Line	Data
35edb766	1	/*
04b3ea0e	2	* (C) Copyright 2014-2016 Leo C. <erbl259-lmu@yahoo.de>
35edb766 L	3	*
	4	* (C) Copyright 2000
	5	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	6	*
	7	* Add to readline cmdline-editing by
	8	* (C) Copyright 2005
	9	* JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
	10	*
8ed66016	11	* SPDX-License-Identifier: GPL-2.0
35edb766 L	12	*/
35edb766 L	13
8ed66016	14	#include "cli.h"
d684c216 L	15	#include "common.h"
	16
	17	#include <string.h>
	18	#include <ctype.h>
	19	#include <stdlib.h>
	20	#include <stdio.h>
	21
	22	#include "config.h"
	23	#include "command.h"
	24	#include "xmalloc.h"
	25	#include "debug.h"
	26	#include "env.h"
	27	#include "cli_readline.h"
	28	#include "con-utils.h"
d684c216	29
bbd45c46 L	30
	31	/* FIXME: Quoting problems */
	32
d684c216 L	33	#define DEBUG_PARSER 0 /* set to 1 to debug */
	34
	35	#define debug_parser(fmt, args...) \
	36	debug_cond(DEBUG_PARSER, fmt, ##args)
	37
13e88ed5 L	38
	39	static bool opt_xtrace;
	40	static bool opt_verbose;
	41	static int_least8_t command_level;
	42
	43	static void cli_trace_cmd(int_fast8_t level, int argc, char *argv[])
	44	{
	45	while (level-- > 0)
	46	putchar('+');
	47	for (int_fast8_t i = 0; i < argc; i++)
	48	printf_P(PSTR(" %s"), argv[i]);
	49	putchar('\n');
	50	}
	51
	52
	53
	54
d684c216 L	55	static int cli_parse_line(char line, char argv[])
d684c216 L	56	{
b0e4f7e5	57	uint_fast8_t state = 0;
d684c216	58	uint_fast8_t nargs = 0;
b0e4f7e5 L	59	char inp, outp;
	60	char c, quote;
	61
	62	debug_parser("%s: \"%s\"\n", __func__, line);
	63
aca998c3	64	for (outp = inp = line, quote = '\0'; (c = *inp) != '\0'; inp++) {
b0e4f7e5 L	65
b0e4f7e5 L	66	switch (state) {
bbd45c46	67	case 0: /* before arg string, waiting for arg start */
b0e4f7e5 L	68	if (isblank(c))
	69	continue;
	70
	71	argv[nargs++] = inp; /* begin of argument string */
	72	outp = inp;
	73	state = 1;
	74	/* fall thru */
	75
bbd45c46	76	case 1: /* in arg string, waiting for end of arg string */
b0e4f7e5 L	77	if (c == '\\') {
	78	++state;
	79	continue;
	80	}
	81	if (c == '\"' \|\| c == '\'') {
	82	quote = c;
	83	state = 3;
	84	continue;
	85	}
	86	if (isblank(c)) {
	87	c = '\0';
	88	state = 0;
	89	}
	90	break;
	91
bbd45c46	92	case 3: /* in quote */
b0e4f7e5 L	93	if (c == '\\' && quote == '\"') {
	94	++state;
	95	continue;
	96	}
	97	if (c == quote) {
	98	state = 1;
	99	continue;
	100	}
	101	break;
d684c216	102
bbd45c46	103	case 2: /* waiting for next char */
b0e4f7e5 L	104	case 4:
	105	--state;
	106	break;
d684c216	107
b0e4f7e5	108	}
aca998c3 L	109
	110	if (nargs > CONFIG_SYS_MAXARGS) {
	111	--nargs;
	112	break;
	113	}
b0e4f7e5	114	*outp++ = c;
d684c216 L	115	}
d684c216 L	116
b0e4f7e5	117	if (*inp != '\0')
d684c216 L	118	printf_P(PSTR(" Too many args (max. %d) \n"), CONFIG_SYS_MAXARGS);
d684c216 L	119
b0e4f7e5	120	*outp = '\0';
d684c216	121	argv[nargs] = NULL;
b0e4f7e5 L	122	debug_parser("%s: nargs=%d\n", __func__, nargs);
	123	#if 0
	124	for (int i = 0; i < nargs; i++)
	125	debug_parser("%s: arg %d: >%s<\n", __func__, i, argv[i]);
	126	#endif
d684c216	127	return nargs;
b0e4f7e5	128
d684c216 L	129	}
d684c216 L	130
507d25e2 L	131	static
507d25e2 L	132	void append_char(uint_fast8_t pass, char **p, char c)
d684c216	133	{
507d25e2 L	134
	135	if (pass) {
	136	**p = c;
	137	}
	138	++(*p);
	139	}
	140
	141	static
	142	char process_macros(char input, char *output)
	143	{
	144	char c, prev, inp, outp;
	145	const char *varname = NULL;
	146
	147	for(uint_fast8_t pass = 0; pass < 2; pass++)
	148	{
b0e4f7e5 L	149	uint_fast8_t state = 0;
b0e4f7e5 L	150	/* 0 = waiting for '$' */
507d25e2 L	151	/* 1 = waiting for '{' */
	152	/* 2 = waiting for '}' */
	153	/* 3 = waiting for ''' */
	154
	155	if (pass == 0) {
	156	outp = output;
	157	} else {
	158	int outputlen = outp - output;
	159	outp = xrealloc(output, outputlen);
	160	output = outp;
d684c216 L	161	}
d684c216 L	162
507d25e2	163	inp = input;
507d25e2	164
b0e4f7e5 L	165	debug_parser("[PROCESS_MACROS] INPUT len %d: \"%s\"\n",
	166	strlen(inp), inp);
	167
	168	for (prev = '\0'; (c = *inp++) != '\0'; prev = c) {
507d25e2	169
507d25e2	170
507d25e2 L	171
	172	switch (state) {
	173	case 0: /* Waiting for (unescaped) $ */
	174	if ((c == '\'') && (prev != '\\')) {
	175	state = 3;
	176	break;
	177	}
b0e4f7e5	178	if ((c == '$') && (prev != '\\')) {
507d25e2	179	state++;
b0e4f7e5 L	180	continue;
b0e4f7e5 L	181	}
507d25e2 L	182	break;
	183	case 1: /* Waiting for { */
	184	if (c == '{') {
	185	state++;
	186	varname = inp;
b0e4f7e5	187	continue;
507d25e2 L	188	} else {
	189	state = 0;
	190	append_char(pass, &outp, '$');
507d25e2 L	191	}
	192	break;
	193	case 2: /* Waiting for } */
	194	if (c == '}') {
	195	/* Terminate variable name */
	196	*(inp-1) = '\0';
bddc7e77	197	const char *envval = getenv_str(varname);
507d25e2 L	198	*(inp-1) = '}';
	199	/* Copy into the line if it exists */
	200	if (envval != NULL)
	201	while (*envval)
	202	append_char(pass, &outp, *(envval++));
	203	/* Look for another '$' */
	204	state = 0;
	205	}
b0e4f7e5	206	continue;
507d25e2	207	case 3: /* Waiting for ' */
b0e4f7e5	208	if (c == '\'')
507d25e2	209	state = 0;
507d25e2	210	break;
d684c216	211	}
b0e4f7e5	212	append_char(pass, &outp, c);
d684c216	213	}
d684c216	214
507d25e2 L	215	append_char(pass, &outp, 0);
507d25e2 L	216	}
d684c216 L	217
d684c216 L	218	debug_parser("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
507d25e2 L	219	strlen(output), output);
	220
	221	return output;
d684c216 L	222	}
d684c216 L	223
f76ca346 L	224	/**
	225	*
	226	*
d684c216 L	227	* WARNING:
	228	*
	229	* We must create a temporary copy of the command since the command we get
bddc7e77	230	* may be the result from getenv_str(), which returns a pointer directly to
d684c216 L	231	* the environment data, which may change magicly when the command we run
d684c216 L	232	* creates or modifies environment variables (like "bootp" does).
f76ca346 L	233	*
	234	*
	235	* @param cmd
	236	* @param flag
	237	* @returns
	238	*
d684c216 L	239	*/
	240	static int cli_run_command(const char *cmd, int flag)
	241	{
	242	char cmdbuf; / working copy of cmd */
	243	char token; / start of token in cmdbuf */
	244	char sep; / end of token (separator) in cmdbuf */
507d25e2	245	char finaltoken = NULL; / token after macro expansion */
d684c216 L	246	char *str;
	247	char argv[CONFIG_SYS_MAXARGS + 1]; / NULL terminated */
	248	int argc;
	249	uint_fast8_t inquotes, repeatable = 1;
	250	int rc = 0;
	251
13e88ed5 L	252	opt_verbose = 0;
	253	opt_xtrace = 0;
	254	char *optenv = getenv_str(PSTR("cli"));
	255	if (optenv) {
	256	opt_verbose = (strstr_P(optenv, PSTR("verbose")) != NULL);
	257	opt_xtrace = (strstr_P(optenv, PSTR("xtrace")) != NULL);
	258	}
	259
f76ca346	260	debug_parser("[RUN_COMMAND] cmd[%p]=\"%s\"\n",
d684c216 L	261	cmd, cmd ? cmd : "NULL");
d684c216 L	262
13e88ed5 L	263	if (opt_verbose)
	264	printf_P(PSTR("%s\n"), cmd, cmd ? cmd : "");
	265
d684c216 L	266	clear_ctrlc(); /* forget any previous Control C */
	267
	268	if (!cmd \|\| !*cmd)
	269	return -1; /* empty command */
	270
69988dc1	271	cmdbuf = strdup(cmd);
507d25e2	272	if (!cmdbuf)
69988dc1	273	return -1; /* not enough memory */
d684c216	274
13e88ed5	275	++command_level;
d684c216 L	276	str = cmdbuf;
	277
	278	/* Process separators and check for invalid
	279	* repeatable commands
	280	*/
	281
	282	debug_parser("[PROCESS_SEPARATORS] %s\n", cmd);
	283	while (*str) {
	284	/*
	285	* Find separator, or string end
	286	* Allow simple escape of ';' by writing "\;"
	287	*/
	288	for (inquotes = 0, sep = str; *sep; sep++) {
	289	if ((*sep == '\'') &&
01c1907d L	290	(sep != str) && /* past string start */
01c1907d L	291	((sep - 1) != '\\')) / and NOT escaped */
d684c216 L	292	inquotes = !inquotes;
	293
	294	if (!inquotes &&
01c1907d L	295	(sep == ';' \|\| sep == '\n' /* separator */
	296	\|\| sep == '#') && / or start of comment */
	297	((sep == str) \|\| /* string start */
	298	((sep - 1) != '\\'))) / or NOT escaped */
d684c216 L	299	break;
	300	}
	301
01c1907d L	302	/* no more commands after unescaped '#' token */
	303	if (*sep == '#')
	304	*sep = '\0';
	305
	306	/* Limit the token to data between separators */
d684c216 L	307	token = str;
d684c216 L	308	if (*sep) {
01c1907d	309	str = sep + 1; /* start of command for next pass */
d684c216 L	310	*sep = '\0';
d684c216 L	311	} else {
01c1907d	312	str = sep; /* no more commands for next pass */
d684c216 L	313	}
	314	debug_parser("token: \"%s\"\n", token);
	315
	316	/* find macros in this token and replace them */
507d25e2	317	finaltoken = process_macros(token, finaltoken);
d684c216 L	318
	319	/* Extract arguments */
	320	argc = cli_parse_line(finaltoken, argv);
	321	if (argc == 0) {
447a805f L	322	//rc = -1;
447a805f L	323	continue; /* no command at all */
d684c216 L	324	}
d684c216 L	325
13e88ed5 L	326	if (opt_xtrace)
	327	cli_trace_cmd(command_level, argc, argv);
	328
	329	rc = cmd_process(flag, argc, argv, &repeatable);
	330	if (rc != CMD_RET_SUCCESS) {
	331	if (opt_verbose)
	332	printf_P(PSTR("Command failed, result=%d\n"), rc);
d684c216	333	rc = -1;
13e88ed5	334	}
d684c216 L	335
	336	/* Did the user stop this? */
	337	if (had_ctrlc()) {
	338	rc = -1; /* if stopped then not repeatable */
	339	break;
	340	}
	341	}
	342
	343	free(cmdbuf);
	344	free(finaltoken);
13e88ed5	345	--command_level;
d684c216 L	346
	347	return rc ? rc : repeatable;
	348	}
	349
	350	static int cli_run_command_list(const char *cmd)
	351	{
	352	return (cli_run_command(cmd, 0) < 0);
	353	}
	354
	355	/******************************************************************************/
	356
	357
	358	/*
b08e079d	359	* Run a command.
d684c216 L	360	*
	361	* @param cmd Command to run
	362	* @param flag Execution flags (CMD_FLAG_...)
	363	* @return 0 on success, or != 0 on error.
	364	*/
	365	int run_command(const char *cmd, int flag)
	366	{
	367	/*
	368	* cli_run_command can return 0 or 1 for success, so clean up
	369	* its result.
	370	*/
	371	if (cli_run_command(cmd, flag) == -1)
	372	return 1;
	373
	374	return 0;
	375	}
	376
	377	/*
	378	* Run a command using the selected parser, and check if it is repeatable.
	379	*
	380	* @param cmd Command to run
	381	* @param flag Execution flags (CMD_FLAG_...)
	382	* @return 0 (not repeatable) or 1 (repeatable) on success, -1 on error.
	383	*/
	384	static int run_command_repeatable(const char *cmd, int flag)
	385	{
	386	return cli_run_command(cmd, flag);
	387	}
	388
	389	int run_command_list(const char *cmd, int len)
	390	{
	391	(void) len;
f76ca346	392
d684c216 L	393	return cli_run_command_list(cmd);
	394	}
	395
	396	/****************************************************************************/
	397
d684c216 L	398
	399	void cli_loop(void)
	400	{
d684c216	401	char *lastcommand = NULL;
d684c216 L	402	int len;
	403	int flag;
	404	int rc = 1;
	405
	406	for (;;) {
66e23a9d	407	len = cli_readline(lastcommand ? PSTR(CONFIG_SYS_PROMPT_REPEAT) : PSTR(CONFIG_SYS_PROMPT), 1);
d684c216 L	408
	409	flag = 0; /* assume no special flags for now */
	410	if (len > 0) {
69988dc1 L	411	free (lastcommand);
69988dc1 L	412	lastcommand = strdup(console_buffer);
d684c216 L	413	} else if (len == 0)
	414	flag \|= CMD_FLAG_REPEAT;
	415
13e88ed5 L	416	if (len == -1) {
	417	if (opt_verbose)
	418	my_puts_P(PSTR("<INTERRUPT>\n"));
	419	} else
d684c216 L	420	rc = run_command_repeatable(lastcommand, flag);
	421
	422	if (rc <= 0) {
	423	/* invalid command or not repeatable, forget it */
d684c216 L	424	free(lastcommand);
d684c216 L	425	lastcommand = NULL;
d684c216 L	426	}
	427	}
	428	}