[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 "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 int_least8_t exec_flags;
#define OPT_XTRACE		1
#define OPT_VERBOSE		2

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 c, prev, *inp;
	char *output = NULL;
	char *outp = NULL;
	const char *varname = NULL;

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

	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) {
			size_t outputlen = outp - (char *) NULL;
			output = (char *) malloc(outputlen);
			if (output == NULL) {
				printf_P(PSTR("** Can't process command: Out of memory! **\n"));
				return NULL;
			}
			outp = output;
		}

		inp = input;

		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, uint_fast8_t flag)
{
	char cmdbuf[strlen(cmd) + 1];			/* 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;

	exec_flags = 0;
	char *optenv = getenv_str(PSTR("cli"));
	if (optenv) {
		if (strstr_P(optenv, PSTR("verbose")) != NULL)
			exec_flags |= OPT_VERBOSE;
		if (strstr_P(optenv, PSTR("xtrace")) != NULL)
			exec_flags |= OPT_XTRACE;
	}

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

	if (exec_flags & OPT_VERBOSE)
		printf_P(PSTR("%s\n"), cmd, cmd ? cmd : "");

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

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

	str = strcpy(cmdbuf, cmd);
	//str = cmdbuf;
	++command_level;

	/* 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);
		if (finaltoken == NULL) {
			rc = -1;	/* no command at all */
			continue;
		}

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

		if (exec_flags & OPT_XTRACE)
			cli_trace_cmd(command_level, argc, argv);

		rc = cmd_process(flag, argc, argv, &repeatable);
		free(finaltoken);
		if (rc != CMD_RET_SUCCESS) {
			if (exec_flags & 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;
		}
	}

	--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, uint_fast8_t 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, uint_fast8_t 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;
	uint_fast8_t 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 (exec_flags & 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"
d684c216 L	24	#include "debug.h"
	25	#include "env.h"
	26	#include "cli_readline.h"
	27	#include "con-utils.h"
d684c216	28
bbd45c46 L	29
	30	/* FIXME: Quoting problems */
	31
d684c216 L	32	#define DEBUG_PARSER 0 /* set to 1 to debug */
	33
	34	#define debug_parser(fmt, args...) \
	35	debug_cond(DEBUG_PARSER, fmt, ##args)
	36
13e88ed5	37
78035a8d L	38	static int_least8_t exec_flags;
	39	#define OPT_XTRACE 1
	40	#define OPT_VERBOSE 2
	41
13e88ed5 L	42	static int_least8_t command_level;
	43
	44	static void cli_trace_cmd(int_fast8_t level, int argc, char *argv[])
	45	{
	46	while (level-- > 0)
	47	putchar('+');
	48	for (int_fast8_t i = 0; i < argc; i++)
	49	printf_P(PSTR(" %s"), argv[i]);
	50	putchar('\n');
	51	}
	52
	53
	54
	55
d684c216 L	56	static int cli_parse_line(char line, char argv[])
d684c216 L	57	{
b0e4f7e5	58	uint_fast8_t state = 0;
d684c216	59	uint_fast8_t nargs = 0;
b0e4f7e5 L	60	char inp, outp;
	61	char c, quote;
	62
	63	debug_parser("%s: \"%s\"\n", __func__, line);
	64
aca998c3	65	for (outp = inp = line, quote = '\0'; (c = *inp) != '\0'; inp++) {
b0e4f7e5 L	66
b0e4f7e5 L	67	switch (state) {
bbd45c46	68	case 0: /* before arg string, waiting for arg start */
b0e4f7e5 L	69	if (isblank(c))
	70	continue;
	71
	72	argv[nargs++] = inp; /* begin of argument string */
	73	outp = inp;
	74	state = 1;
	75	/* fall thru */
	76
bbd45c46	77	case 1: /* in arg string, waiting for end of arg string */
b0e4f7e5 L	78	if (c == '\\') {
	79	++state;
	80	continue;
	81	}
	82	if (c == '\"' \|\| c == '\'') {
	83	quote = c;
	84	state = 3;
	85	continue;
	86	}
	87	if (isblank(c)) {
	88	c = '\0';
	89	state = 0;
	90	}
	91	break;
	92
bbd45c46	93	case 3: /* in quote */
b0e4f7e5 L	94	if (c == '\\' && quote == '\"') {
	95	++state;
	96	continue;
	97	}
	98	if (c == quote) {
	99	state = 1;
	100	continue;
	101	}
	102	break;
d684c216	103
bbd45c46	104	case 2: /* waiting for next char */
b0e4f7e5 L	105	case 4:
	106	--state;
	107	break;
d684c216	108
b0e4f7e5	109	}
aca998c3 L	110
	111	if (nargs > CONFIG_SYS_MAXARGS) {
	112	--nargs;
	113	break;
	114	}
b0e4f7e5	115	*outp++ = c;
d684c216 L	116	}
d684c216 L	117
b0e4f7e5	118	if (*inp != '\0')
d684c216 L	119	printf_P(PSTR(" Too many args (max. %d) \n"), CONFIG_SYS_MAXARGS);
d684c216 L	120
b0e4f7e5	121	*outp = '\0';
d684c216	122	argv[nargs] = NULL;
b0e4f7e5 L	123	debug_parser("%s: nargs=%d\n", __func__, nargs);
	124	#if 0
	125	for (int i = 0; i < nargs; i++)
	126	debug_parser("%s: arg %d: >%s<\n", __func__, i, argv[i]);
	127	#endif
d684c216	128	return nargs;
b0e4f7e5	129
d684c216 L	130	}
d684c216 L	131
507d25e2 L	132	static
507d25e2 L	133	void append_char(uint_fast8_t pass, char **p, char c)
d684c216	134	{
507d25e2 L	135
	136	if (pass) {
	137	**p = c;
	138	}
	139	++(*p);
	140	}
	141
	142	static
78035a8d	143	char process_macros(char input)
507d25e2	144	{
78035a8d L	145	char c, prev, *inp;
	146	char *output = NULL;
	147	char *outp = NULL;
507d25e2 L	148	const char *varname = NULL;
507d25e2 L	149
78035a8d L	150	debug_parser("[PROCESS_MACROS] INPUT len %d: \"%s\"\n",
	151	strlen(input), input);
	152
507d25e2 L	153	for(uint_fast8_t pass = 0; pass < 2; pass++)
507d25e2 L	154	{
b0e4f7e5 L	155	uint_fast8_t state = 0;
b0e4f7e5 L	156	/* 0 = waiting for '$' */
507d25e2 L	157	/* 1 = waiting for '{' */
	158	/* 2 = waiting for '}' */
	159	/* 3 = waiting for ''' */
	160
78035a8d L	161	if (pass > 0) {
	162	size_t outputlen = outp - (char *) NULL;
	163	output = (char *) malloc(outputlen);
	164	if (output == NULL) {
	165	printf_P(PSTR(" Can't process command: Out of memory! \n"));
	166	return NULL;
	167	}
507d25e2	168	outp = output;
d684c216 L	169	}
d684c216 L	170
507d25e2	171	inp = input;
507d25e2	172
b0e4f7e5	173	for (prev = '\0'; (c = *inp++) != '\0'; prev = c) {
507d25e2	174
507d25e2	175
507d25e2 L	176
	177	switch (state) {
	178	case 0: /* Waiting for (unescaped) $ */
	179	if ((c == '\'') && (prev != '\\')) {
	180	state = 3;
	181	break;
	182	}
b0e4f7e5	183	if ((c == '$') && (prev != '\\')) {
507d25e2	184	state++;
b0e4f7e5 L	185	continue;
b0e4f7e5 L	186	}
507d25e2 L	187	break;
	188	case 1: /* Waiting for { */
	189	if (c == '{') {
	190	state++;
	191	varname = inp;
b0e4f7e5	192	continue;
507d25e2 L	193	} else {
	194	state = 0;
	195	append_char(pass, &outp, '$');
507d25e2 L	196	}
	197	break;
	198	case 2: /* Waiting for } */
	199	if (c == '}') {
	200	/* Terminate variable name */
	201	*(inp-1) = '\0';
bddc7e77	202	const char *envval = getenv_str(varname);
507d25e2 L	203	*(inp-1) = '}';
	204	/* Copy into the line if it exists */
	205	if (envval != NULL)
	206	while (*envval)
	207	append_char(pass, &outp, *(envval++));
	208	/* Look for another '$' */
	209	state = 0;
	210	}
b0e4f7e5	211	continue;
507d25e2	212	case 3: /* Waiting for ' */
b0e4f7e5	213	if (c == '\'')
507d25e2	214	state = 0;
507d25e2	215	break;
d684c216	216	}
b0e4f7e5	217	append_char(pass, &outp, c);
d684c216	218	}
d684c216	219
507d25e2 L	220	append_char(pass, &outp, 0);
507d25e2 L	221	}
d684c216 L	222
d684c216 L	223	debug_parser("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
507d25e2 L	224	strlen(output), output);
	225
	226	return output;
d684c216 L	227	}
d684c216 L	228
f76ca346 L	229	/**
	230	*
	231	*
d684c216 L	232	* WARNING:
	233	*
	234	* We must create a temporary copy of the command since the command we get
bddc7e77	235	* may be the result from getenv_str(), which returns a pointer directly to
d684c216 L	236	* the environment data, which may change magicly when the command we run
d684c216 L	237	* creates or modifies environment variables (like "bootp" does).
f76ca346 L	238	*
	239	*
	240	* @param cmd
	241	* @param flag
	242	* @returns
	243	*
d684c216	244	*/
fcf1d5b3	245	static int cli_run_command(const char *cmd, uint_fast8_t flag)
d684c216	246	{
78035a8d	247	char cmdbuf[strlen(cmd) + 1]; /* working copy of cmd */
d684c216 L	248	char token; / start of token in cmdbuf */
d684c216 L	249	char sep; / end of token (separator) in cmdbuf */
507d25e2	250	char finaltoken = NULL; / token after macro expansion */
d684c216 L	251	char *str;
	252	char argv[CONFIG_SYS_MAXARGS + 1]; / NULL terminated */
	253	int argc;
	254	uint_fast8_t inquotes, repeatable = 1;
	255	int rc = 0;
	256
78035a8d	257	exec_flags = 0;
13e88ed5 L	258	char *optenv = getenv_str(PSTR("cli"));
13e88ed5 L	259	if (optenv) {
78035a8d L	260	if (strstr_P(optenv, PSTR("verbose")) != NULL)
	261	exec_flags \|= OPT_VERBOSE;
	262	if (strstr_P(optenv, PSTR("xtrace")) != NULL)
	263	exec_flags \|= OPT_XTRACE;
13e88ed5 L	264	}
13e88ed5 L	265
f76ca346	266	debug_parser("[RUN_COMMAND] cmd[%p]=\"%s\"\n",
d684c216 L	267	cmd, cmd ? cmd : "NULL");
d684c216 L	268
78035a8d	269	if (exec_flags & OPT_VERBOSE)
13e88ed5 L	270	printf_P(PSTR("%s\n"), cmd, cmd ? cmd : "");
13e88ed5 L	271
d684c216 L	272	if (!cmd \|\| !*cmd)
	273	return -1; /* empty command */
	274
78035a8d	275	clear_ctrlc(); /* forget any previous Control C */
d684c216	276
78035a8d L	277	str = strcpy(cmdbuf, cmd);
78035a8d L	278	//str = cmdbuf;
13e88ed5	279	++command_level;
d684c216 L	280
	281	/* Process separators and check for invalid
	282	* repeatable commands
	283	*/
	284
78035a8d	285	debug_parser("[PROCESS_SEPARATORS] \"%s\"\n", cmd);
d684c216 L	286	while (*str) {
	287	/*
	288	* Find separator, or string end
	289	* Allow simple escape of ';' by writing "\;"
	290	*/
	291	for (inquotes = 0, sep = str; *sep; sep++) {
	292	if ((*sep == '\'') &&
01c1907d L	293	(sep != str) && /* past string start */
01c1907d L	294	((sep - 1) != '\\')) / and NOT escaped */
d684c216 L	295	inquotes = !inquotes;
	296
	297	if (!inquotes &&
01c1907d L	298	(sep == ';' \|\| sep == '\n' /* separator */
	299	\|\| sep == '#') && / or start of comment */
	300	((sep == str) \|\| /* string start */
	301	((sep - 1) != '\\'))) / or NOT escaped */
d684c216 L	302	break;
	303	}
	304
01c1907d L	305	/* no more commands after unescaped '#' token */
	306	if (*sep == '#')
	307	*sep = '\0';
	308
	309	/* Limit the token to data between separators */
d684c216 L	310	token = str;
d684c216 L	311	if (*sep) {
01c1907d	312	str = sep + 1; /* start of command for next pass */
d684c216 L	313	*sep = '\0';
d684c216 L	314	} else {
01c1907d	315	str = sep; /* no more commands for next pass */
d684c216 L	316	}
	317	debug_parser("token: \"%s\"\n", token);
	318
	319	/* find macros in this token and replace them */
78035a8d L	320	finaltoken = process_macros(token);
	321	if (finaltoken == NULL) {
	322	rc = -1; /* no command at all */
	323	continue;
	324	}
d684c216 L	325
	326	/* Extract arguments */
	327	argc = cli_parse_line(finaltoken, argv);
	328	if (argc == 0) {
78035a8d L	329	rc = -1; /* no command at all */
	330	free(finaltoken);
	331	continue;
d684c216 L	332	}
d684c216 L	333
78035a8d	334	if (exec_flags & OPT_XTRACE)
13e88ed5 L	335	cli_trace_cmd(command_level, argc, argv);
	336
	337	rc = cmd_process(flag, argc, argv, &repeatable);
78035a8d	338	free(finaltoken);
13e88ed5	339	if (rc != CMD_RET_SUCCESS) {
78035a8d	340	if (exec_flags & OPT_VERBOSE)
13e88ed5	341	printf_P(PSTR("Command failed, result=%d\n"), rc);
d684c216	342	rc = -1;
13e88ed5	343	}
d684c216 L	344
	345	/* Did the user stop this? */
	346	if (had_ctrlc()) {
	347	rc = -1; /* if stopped then not repeatable */
	348	break;
	349	}
	350	}
	351
13e88ed5	352	--command_level;
d684c216 L	353
	354	return rc ? rc : repeatable;
	355	}
	356
	357	static int cli_run_command_list(const char *cmd)
	358	{
	359	return (cli_run_command(cmd, 0) < 0);
	360	}
	361
	362	/******************************************************************************/
	363
	364
	365	/*
b08e079d	366	* Run a command.
d684c216 L	367	*
	368	* @param cmd Command to run
	369	* @param flag Execution flags (CMD_FLAG_...)
	370	* @return 0 on success, or != 0 on error.
	371	*/
fcf1d5b3	372	int run_command(const char *cmd, uint_fast8_t flag)
d684c216 L	373	{
	374	/*
	375	* cli_run_command can return 0 or 1 for success, so clean up
	376	* its result.
	377	*/
	378	if (cli_run_command(cmd, flag) == -1)
	379	return 1;
	380
	381	return 0;
	382	}
	383
	384	/*
	385	* Run a command using the selected parser, and check if it is repeatable.
	386	*
	387	* @param cmd Command to run
	388	* @param flag Execution flags (CMD_FLAG_...)
	389	* @return 0 (not repeatable) or 1 (repeatable) on success, -1 on error.
	390	*/
fcf1d5b3	391	static int run_command_repeatable(const char *cmd, uint_fast8_t flag)
d684c216 L	392	{
	393	return cli_run_command(cmd, flag);
	394	}
	395
	396	int run_command_list(const char *cmd, int len)
	397	{
	398	(void) len;
f76ca346	399
d684c216 L	400	return cli_run_command_list(cmd);
	401	}
	402
	403	/****************************************************************************/
	404
d684c216 L	405
	406	void cli_loop(void)
	407	{
d684c216	408	char *lastcommand = NULL;
d684c216	409	int len;
fcf1d5b3	410	uint_fast8_t flag;
d684c216 L	411	int rc = 1;
	412
	413	for (;;) {
66e23a9d	414	len = cli_readline(lastcommand ? PSTR(CONFIG_SYS_PROMPT_REPEAT) : PSTR(CONFIG_SYS_PROMPT), 1);
d684c216 L	415
	416	flag = 0; /* assume no special flags for now */
	417	if (len > 0) {
69988dc1 L	418	free (lastcommand);
69988dc1 L	419	lastcommand = strdup(console_buffer);
d684c216 L	420	} else if (len == 0)
	421	flag \|= CMD_FLAG_REPEAT;
	422
13e88ed5	423	if (len == -1) {
78035a8d	424	if (exec_flags & OPT_VERBOSE)
13e88ed5 L	425	my_puts_P(PSTR("<INTERRUPT>\n"));
13e88ed5 L	426	} else
d684c216 L	427	rc = run_command_repeatable(lastcommand, flag);
	428
	429	if (rc <= 0) {
	430	/* invalid command or not repeatable, forget it */
d684c216 L	431	free(lastcommand);
d684c216 L	432	lastcommand = NULL;
d684c216 L	433	}
	434	}
	435	}