[fio.git] / parse.c

/*
 * This file contains the ini and command liner parser main.
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <limits.h>

#include "parse.h"

static void show_option_range(struct fio_option *o)
{
	if (!o->minval && !o->maxval)
		return;

	printf("%20s: min=%d, max=%d\n", "range", o->minval, o->maxval);
}

static void show_option_values(struct fio_option *o)
{
	const char *msg;
	int i = 0;

	do {
		msg = o->posval[i].ival;
		if (!msg)
			break;

		if (!i)
			printf("%20s: ", "valid values");

		printf("%s,", msg);
		i++;
	} while (i < PARSE_MAX_VP);

	if (i)
		printf("\n");
}

static unsigned long get_mult_time(char c)
{
	switch (c) {
		case 'm':
		case 'M':
			return 60;
		case 'h':
		case 'H':
			return 60 * 60;
		case 'd':
		case 'D':
			return 24 * 60 * 60;
		default:
			return 1;
	}
}

static unsigned long get_mult_bytes(char c)
{
	switch (c) {
		case 'k':
		case 'K':
			return 1024;
		case 'm':
		case 'M':
			return 1024 * 1024;
		case 'g':
		case 'G':
			return 1024 * 1024 * 1024;
		case 'e':
		case 'E':
			return 1024 * 1024 * 1024 * 1024UL;
		default:
			return 1;
	}
}

/*
 * convert string into decimal value, noting any size suffix
 */
static int str_to_decimal(const char *str, long long *val, int kilo)
{
	int len;

	len = strlen(str);
	if (!len)
		return 1;

	*val = strtoll(str, NULL, 10);
	if (*val == LONG_MAX && errno == ERANGE)
		return 1;

	if (kilo)
		*val *= get_mult_bytes(str[len - 1]);
	else
		*val *= get_mult_time(str[len - 1]);

	return 0;
}

static int check_str_bytes(const char *p, long long *val)
{
	return str_to_decimal(p, val, 1);
}

static int check_str_time(const char *p, long long *val)
{
	return str_to_decimal(p, val, 0);
}

void strip_blank_front(char **p)
{
	char *s = *p;

	while (isspace(*s))
		s++;
}

void strip_blank_end(char *p)
{
	char *s = p + strlen(p) - 1;

	while (isspace(*s) || iscntrl(*s))
		s--;

	*(s + 1) = '\0';
}

static int check_range_bytes(const char *str, long *val)
{
	char suffix;

	if (!strlen(str))
		return 1;

	if (sscanf(str, "%lu%c", val, &suffix) == 2) {
		*val *= get_mult_bytes(suffix);
		return 0;
	}

	if (sscanf(str, "%lu", val) == 1)
		return 0;

	return 1;
}

static int check_int(const char *p, int *val)
{
	if (!strlen(p))
		return 1;
	if (sscanf(p, "%u", val) == 1)
		return 0;

	return 1;
}

static struct fio_option *find_option(struct fio_option *options,
				      const char *opt)
{
	struct fio_option *o;

	for (o = &options[0]; o->name; o++) {
		if (!strcmp(o->name, opt))
			return o;
		else if (o->alias && !strcmp(o->alias, opt))
			return o;
	}

	return NULL;
}

#define val_store(ptr, val, off, data)			\
	do {						\
		ptr = td_var((data), (off));		\
		*ptr = (val);				\
	} while (0)

static int __handle_option(struct fio_option *o, const char *ptr, void *data,
			   int first, int more)
{
	int il, *ilp;
	long long ull, *ullp;
	long ul1, ul2;
	char **cp;
	int ret = 0, is_time = 0;

	if (!ptr && o->type != FIO_OPT_STR_SET) {
		fprintf(stderr, "Option %s requires an argument\n", o->name);
		return 1;
	}

	switch (o->type) {
	case FIO_OPT_STR: {
		fio_opt_str_fn *fn = o->cb;
		const struct value_pair *vp;
		int i;

		for (i = 0; i < PARSE_MAX_VP; i++) {
			vp = &o->posval[i];
			if (!vp->ival || vp->ival[0] == '\0')
				break;
			ret = 1;
			if (!strncmp(vp->ival, ptr, strlen(vp->ival))) {
				ret = 0;
				if (!o->off1)
					break;
				val_store(ilp, vp->oval, o->off1, data);
				break;
			}
		}

		if (ret)
			show_option_values(o);
		else if (fn)
			ret = fn(data, ptr);
		break;
	}
	case FIO_OPT_STR_VAL_TIME:
		is_time = 1;
	case FIO_OPT_STR_VAL:
	case FIO_OPT_STR_VAL_INT: {
		fio_opt_str_val_fn *fn = o->cb;

		if (is_time)
			ret = check_str_time(ptr, &ull);
		else
			ret = check_str_bytes(ptr, &ull);

		if (ret)
			break;

		if (o->maxval && ull > o->maxval) {
			fprintf(stderr, "max value out of range: %lld (%d max)\n", ull, o->maxval);
			return 1;
		}
		if (o->minval && ull < o->minval) {
			fprintf(stderr, "min value out of range: %lld (%d min)\n", ull, o->minval);
			return 1;
		}

		if (fn)
			ret = fn(data, &ull);
		else {
			if (o->type == FIO_OPT_STR_VAL_INT) {
				if (first)
					val_store(ilp, ull, o->off1, data);
				if (!more && o->off2)
					val_store(ilp, ull, o->off2, data);
			} else {
				if (first)
					val_store(ullp, ull, o->off1, data);
				if (!more && o->off2)
					val_store(ullp, ull, o->off2, data);
			}
		}
		break;
	}
	case FIO_OPT_STR_STORE: {
		fio_opt_str_fn *fn = o->cb;

		cp = td_var(data, o->off1);
		*cp = strdup(ptr);
		if (fn) {
			ret = fn(data, ptr);
			if (ret) {
				free(*cp);
				*cp = NULL;
			}
		}
		break;
	}
	case FIO_OPT_RANGE: {
		char tmp[128];
		char *p1, *p2;

		strncpy(tmp, ptr, sizeof(tmp) - 1);

		p1 = strchr(tmp, '-');
		if (!p1) {
			p1 = strchr(tmp, ':');
			if (!p1) {
				ret = 1;
				break;
			}
		}

		p2 = p1 + 1;
		*p1 = '\0';
		p1 = tmp;

		ret = 1;
		if (!check_range_bytes(p1, &ul1) && !check_range_bytes(p2, &ul2)) {
			ret = 0;
			if (ul1 > ul2) {
				unsigned long foo = ul1;

				ul1 = ul2;
				ul2 = foo;
			}

			if (first) {
				val_store(ilp, ul1, o->off1, data);
				val_store(ilp, ul2, o->off2, data);
			}
			if (!more && o->off3 && o->off4) {
				val_store(ilp, ul1, o->off3, data);
				val_store(ilp, ul2, o->off4, data);
			}
		}

		break;
	}
	case FIO_OPT_INT:
	case FIO_OPT_BOOL: {
		fio_opt_int_fn *fn = o->cb;

		ret = check_int(ptr, &il);
		if (ret)
			break;

		if (o->maxval && il > (int) o->maxval) {
			fprintf(stderr, "max value out of range: %d (%d max)\n", il, o->maxval);
			return 1;
		}
		if (o->minval && il < o->minval) {
			fprintf(stderr, "min value out of range: %d (%d min)\n", il, o->minval);
			return 1;
		}

		if (o->neg)
			il = !il;

		if (fn)
			ret = fn(data, &il);
		else {
			if (first)
				val_store(ilp, il, o->off1, data);
			if (!more && o->off2)
				val_store(ilp, il, o->off2, data);
		}
		break;
	}
	case FIO_OPT_STR_SET: {
		fio_opt_str_set_fn *fn = o->cb;

		if (fn)
			ret = fn(data);
		else {
			if (first)
				val_store(ilp, 1, o->off1, data);
			if (!more && o->off2)
				val_store(ilp, 1, o->off2, data);
		}
		break;
	}
	default:
		fprintf(stderr, "Bad option type %u\n", o->type);
		ret = 1;
	}

	return ret;
}

static int handle_option(struct fio_option *o, const char *ptr, void *data)
{
	const char *ptr2 = NULL;
	int r1, r2;

	/*
	 * See if we have a second set of parameters, hidden after a comma.
	 * Do this before parsing the first round, to check if we should
	 * copy set 1 options to set 2.
	 */
	if (ptr &&
	    (o->type != FIO_OPT_STR_STORE) &&
	    (o->type != FIO_OPT_STR)) {
		ptr2 = strchr(ptr, ',');
		if (!ptr2)
			ptr2 = strchr(ptr, ':');
	}

	/*
	 * Don't return early if parsing the first option fails - if
	 * we are doing multiple arguments, we can allow the first one
	 * being empty.
	 */
	r1 = __handle_option(o, ptr, data, 1, !!ptr2);

	if (!ptr2)
		return r1;

	ptr2++;
	r2 = __handle_option(o, ptr2, data, 0, 0);

	return r1 && r2;
}

int parse_cmd_option(const char *opt, const char *val,
		     struct fio_option *options, void *data)
{
	struct fio_option *o;

	o = find_option(options, opt);
	if (!o) {
		fprintf(stderr, "Bad option %s\n", opt);
		return 1;
	}

	if (!handle_option(o, val, data))
		return 0;

	fprintf(stderr, "fio: failed parsing %s=%s\n", opt, val);
	return 1;
}

int parse_option(const char *opt, struct fio_option *options, void *data)
{
	struct fio_option *o;
	char *pre, *post;
	char tmp[64];

	strncpy(tmp, opt, sizeof(tmp) - 1);

	pre = strchr(tmp, '=');
	if (pre) {
		post = pre;
		*pre = '\0';
		pre = tmp;
		post++;
		o = find_option(options, pre);
	} else {
		o = find_option(options, tmp);
		post = NULL;
	}

	if (!o) {
		fprintf(stderr, "Bad option %s\n", tmp);
		return 1;
	}

	if (!handle_option(o, post, data))
		return 0;

	fprintf(stderr, "fio: failed parsing %s\n", opt);
	return 1;
}

/*
 * Option match, levenshtein distance. Handy for not quite remembering what
 * the option name is.
 */
static int string_distance(const char *s1, const char *s2)
{
	unsigned int s1_len = strlen(s1);
	unsigned int s2_len = strlen(s2);
	unsigned int *p, *q, *r;
	unsigned int i, j;

	p = malloc(sizeof(unsigned int) * (s2_len + 1));
	q = malloc(sizeof(unsigned int) * (s2_len + 1));

	p[0] = 0;
	for (i = 1; i <= s2_len; i++)
		p[i] = p[i - 1] + 1;

	for (i = 1; i <= s1_len; i++) {
		q[0] = p[0] + 1;
		for (j = 1; j <= s2_len; j++) {
			unsigned int sub = p[j - 1];

			if (s1[i - 1] != s2[j - 1])
				sub++;

			q[j] = min(p[j] + 1, min(q[j - 1] + 1, sub));
		}
		r = p;
		p = q;
		q = r;
	}

	i = p[s2_len];
	free(p);
	free(q);
	return i;
}

static void show_option_help(struct fio_option *o)
{
	const char *typehelp[] = {
		"string (opt=bla)",
		"string with possible k/m/g postfix (opt=4k)",
		"string with range and postfix (opt=1k-4k)",
		"string with time postfix (opt=10s)",
		"string (opt=bla)",
		"string with dual range (opt=1k-4k,4k-8k)",
		"integer value (opt=100)",
		"boolean value (opt=1)",
		"no argument (opt)",
	};

	printf("%20s: %s\n", "type", typehelp[o->type]);
	printf("%20s: %s\n", "default", o->def ? o->def : "no default");
	show_option_range(o);
	show_option_values(o);
}

int show_cmd_help(struct fio_option *options, const char *name)
{
	struct fio_option *o, *closest;
	unsigned int best_dist;
	int found = 0;
	int show_all = 0;

	if (!name || !strcmp(name, "all"))
		show_all = 1;

	closest = NULL;
	best_dist = -1;
	for (o = &options[0]; o->name; o++) {
		int match = 0;

		if (name) {
			if (!strcmp(name, o->name))
				match = 1;
			else {
				unsigned int dist;

				dist = string_distance(name, o->name);
				if (dist < best_dist) {
					best_dist = dist;
					closest = o;
				}
			}
		}

		if (show_all || match) {
			found = 1;
			if (match)
				printf("%20s: %s\n", o->name, o->help);
			if (show_all) {
				printf("%-20s: %s\n", o->name, o->help);
				continue;
			}
		}

		if (!match)
			continue;

		show_option_help(o);
	}

	if (found)
		return 0;

	printf("No such command: %s", name);
	if (closest) {
		printf(" - showing closest match\n");
		printf("%20s: %s\n", closest->name, closest->help);
		show_option_help(closest);
	} else
		printf("\n");

	return 1;
}

/*
 * Handle parsing of default parameters.
 */
void fill_default_options(void *data, struct fio_option *options)
{
	struct fio_option *o;

	for (o = &options[0]; o->name; o++)
		if (o->def)
			handle_option(o, o->def, data);
}

/*
 * Sanitize the options structure. For now it just sets min/max for bool
 * values and whether both callback and offsets are given.
 */
void options_init(struct fio_option *options)
{
	struct fio_option *o;

	for (o = &options[0]; o->name; o++) {
		if (o->type == FIO_OPT_BOOL) {
			o->minval = 0;
			o->maxval = 1;
		}
		if (!o->cb && !o->off1)
			fprintf(stderr, "Option %s: neither cb nor offset given\n", o->name);
		if (o->type == FIO_OPT_STR || o->type == FIO_OPT_STR_STORE)
			continue;
		if (o->cb && (o->off1 || o->off2 || o->off3 || o->off4))
			fprintf(stderr, "Option %s: both cb and offset given\n", o->name);
	}
}
Commit	Line	Data
	1	/*
	2	* This file contains the ini and command liner parser main.
	3	*/
	4	#include <stdio.h>
	5	#include <stdlib.h>
	6	#include <unistd.h>
	7	#include <ctype.h>
	8	#include <string.h>
	9	#include <errno.h>
	10	#include <limits.h>
	11
	12	#include "parse.h"
	13
	14	static void show_option_range(struct fio_option *o)
	15	{
	16	if (!o->minval && !o->maxval)
	17	return;
	18
	19	printf("%20s: min=%d, max=%d\n", "range", o->minval, o->maxval);
	20	}
	21
	22	static void show_option_values(struct fio_option *o)
	23	{
	24	const char *msg;
	25	int i = 0;
	26
	27	do {
	28	msg = o->posval[i].ival;
	29	if (!msg)
	30	break;
	31
	32	if (!i)
	33	printf("%20s: ", "valid values");
	34
	35	printf("%s,", msg);
	36	i++;
	37	} while (i < PARSE_MAX_VP);
	38
	39	if (i)
	40	printf("\n");
	41	}
	42
	43	static unsigned long get_mult_time(char c)
	44	{
	45	switch (c) {
	46	case 'm':
	47	case 'M':
	48	return 60;
	49	case 'h':
	50	case 'H':
	51	return 60 * 60;
	52	case 'd':
	53	case 'D':
	54	return 24 * 60 * 60;
	55	default:
	56	return 1;
	57	}
	58	}
	59
	60	static unsigned long get_mult_bytes(char c)
	61	{
	62	switch (c) {
	63	case 'k':
	64	case 'K':
	65	return 1024;
	66	case 'm':
	67	case 'M':
	68	return 1024 * 1024;
	69	case 'g':
	70	case 'G':
	71	return 1024 * 1024 * 1024;
	72	case 'e':
	73	case 'E':
	74	return 1024 * 1024 * 1024 * 1024UL;
	75	default:
	76	return 1;
	77	}
	78	}
	79
	80	/*
	81	* convert string into decimal value, noting any size suffix
	82	*/
	83	static int str_to_decimal(const char str, long long val, int kilo)
	84	{
	85	int len;
	86
	87	len = strlen(str);
	88	if (!len)
	89	return 1;
	90
	91	*val = strtoll(str, NULL, 10);
	92	if (*val == LONG_MAX && errno == ERANGE)
	93	return 1;
	94
	95	if (kilo)
	96	val = get_mult_bytes(str[len - 1]);
	97	else
	98	val = get_mult_time(str[len - 1]);
	99
	100	return 0;
	101	}
	102
	103	static int check_str_bytes(const char p, long long val)
	104	{
	105	return str_to_decimal(p, val, 1);
	106	}
	107
	108	static int check_str_time(const char p, long long val)
	109	{
	110	return str_to_decimal(p, val, 0);
	111	}
	112
	113	void strip_blank_front(char **p)
	114	{
	115	char s = p;
	116
	117	while (isspace(*s))
	118	s++;
	119	}
	120
	121	void strip_blank_end(char *p)
	122	{
	123	char *s = p + strlen(p) - 1;
	124
	125	while (isspace(s) \|\| iscntrl(s))
	126	s--;
	127
	128	*(s + 1) = '\0';
	129	}
	130
	131	static int check_range_bytes(const char str, long val)
	132	{
	133	char suffix;
	134
	135	if (!strlen(str))
	136	return 1;
	137
	138	if (sscanf(str, "%lu%c", val, &suffix) == 2) {
	139	val = get_mult_bytes(suffix);
	140	return 0;
	141	}
	142
	143	if (sscanf(str, "%lu", val) == 1)
	144	return 0;
	145
	146	return 1;
	147	}
	148
	149	static int check_int(const char p, int val)
	150	{
	151	if (!strlen(p))
	152	return 1;
	153	if (sscanf(p, "%u", val) == 1)
	154	return 0;
	155
	156	return 1;
	157	}
	158
	159	static struct fio_option find_option(struct fio_option options,
	160	const char *opt)
	161	{
	162	struct fio_option *o;
	163
	164	for (o = &options[0]; o->name; o++) {
	165	if (!strcmp(o->name, opt))
	166	return o;
	167	else if (o->alias && !strcmp(o->alias, opt))
	168	return o;
	169	}
	170
	171	return NULL;
	172	}
	173
	174	#define val_store(ptr, val, off, data) \
	175	do { \
	176	ptr = td_var((data), (off)); \
	177	*ptr = (val); \
	178	} while (0)
	179
	180	static int __handle_option(struct fio_option o, const char ptr, void *data,
	181	int first, int more)
	182	{
	183	int il, *ilp;
	184	long long ull, *ullp;
	185	long ul1, ul2;
	186	char **cp;
	187	int ret = 0, is_time = 0;
	188
	189	if (!ptr && o->type != FIO_OPT_STR_SET) {
	190	fprintf(stderr, "Option %s requires an argument\n", o->name);
	191	return 1;
	192	}
	193
	194	switch (o->type) {
	195	case FIO_OPT_STR: {
	196	fio_opt_str_fn *fn = o->cb;
	197	const struct value_pair *vp;
	198	int i;
	199
	200	for (i = 0; i < PARSE_MAX_VP; i++) {
	201	vp = &o->posval[i];
	202	if (!vp->ival \|\| vp->ival[0] == '\0')
	203	break;
	204	ret = 1;
	205	if (!strncmp(vp->ival, ptr, strlen(vp->ival))) {
	206	ret = 0;
	207	if (!o->off1)
	208	break;
	209	val_store(ilp, vp->oval, o->off1, data);
	210	break;
	211	}
	212	}
	213
	214	if (ret)
	215	show_option_values(o);
	216	else if (fn)
	217	ret = fn(data, ptr);
	218	break;
	219	}
	220	case FIO_OPT_STR_VAL_TIME:
	221	is_time = 1;
	222	case FIO_OPT_STR_VAL:
	223	case FIO_OPT_STR_VAL_INT: {
	224	fio_opt_str_val_fn *fn = o->cb;
	225
	226	if (is_time)
	227	ret = check_str_time(ptr, &ull);
	228	else
	229	ret = check_str_bytes(ptr, &ull);
	230
	231	if (ret)
	232	break;
	233
	234	if (o->maxval && ull > o->maxval) {
	235	fprintf(stderr, "max value out of range: %lld (%d max)\n", ull, o->maxval);
	236	return 1;
	237	}
	238	if (o->minval && ull < o->minval) {
	239	fprintf(stderr, "min value out of range: %lld (%d min)\n", ull, o->minval);
	240	return 1;
	241	}
	242
	243	if (fn)
	244	ret = fn(data, &ull);
	245	else {
	246	if (o->type == FIO_OPT_STR_VAL_INT) {
	247	if (first)
	248	val_store(ilp, ull, o->off1, data);
	249	if (!more && o->off2)
	250	val_store(ilp, ull, o->off2, data);
	251	} else {
	252	if (first)
	253	val_store(ullp, ull, o->off1, data);
	254	if (!more && o->off2)
	255	val_store(ullp, ull, o->off2, data);
	256	}
	257	}
	258	break;
	259	}
	260	case FIO_OPT_STR_STORE: {
	261	fio_opt_str_fn *fn = o->cb;
	262
	263	cp = td_var(data, o->off1);
	264	*cp = strdup(ptr);
	265	if (fn) {
	266	ret = fn(data, ptr);
	267	if (ret) {
	268	free(*cp);
	269	*cp = NULL;
	270	}
	271	}
	272	break;
	273	}
	274	case FIO_OPT_RANGE: {
	275	char tmp[128];
	276	char p1, p2;
	277
	278	strncpy(tmp, ptr, sizeof(tmp) - 1);
	279
	280	p1 = strchr(tmp, '-');
	281	if (!p1) {
	282	p1 = strchr(tmp, ':');
	283	if (!p1) {
	284	ret = 1;
	285	break;
	286	}
	287	}
	288
	289	p2 = p1 + 1;
	290	*p1 = '\0';
	291	p1 = tmp;
	292
	293	ret = 1;
	294	if (!check_range_bytes(p1, &ul1) && !check_range_bytes(p2, &ul2)) {
	295	ret = 0;
	296	if (ul1 > ul2) {
	297	unsigned long foo = ul1;
	298
	299	ul1 = ul2;
	300	ul2 = foo;
	301	}
	302
	303	if (first) {
	304	val_store(ilp, ul1, o->off1, data);
	305	val_store(ilp, ul2, o->off2, data);
	306	}
	307	if (!more && o->off3 && o->off4) {
	308	val_store(ilp, ul1, o->off3, data);
	309	val_store(ilp, ul2, o->off4, data);
	310	}
	311	}
	312
	313	break;
	314	}
	315	case FIO_OPT_INT:
	316	case FIO_OPT_BOOL: {
	317	fio_opt_int_fn *fn = o->cb;
	318
	319	ret = check_int(ptr, &il);
	320	if (ret)
	321	break;
	322
	323	if (o->maxval && il > (int) o->maxval) {
	324	fprintf(stderr, "max value out of range: %d (%d max)\n", il, o->maxval);
	325	return 1;
	326	}
	327	if (o->minval && il < o->minval) {
	328	fprintf(stderr, "min value out of range: %d (%d min)\n", il, o->minval);
	329	return 1;
	330	}
	331
	332	if (o->neg)
	333	il = !il;
	334
	335	if (fn)
	336	ret = fn(data, &il);
	337	else {
	338	if (first)
	339	val_store(ilp, il, o->off1, data);
	340	if (!more && o->off2)
	341	val_store(ilp, il, o->off2, data);
	342	}
	343	break;
	344	}
	345	case FIO_OPT_STR_SET: {
	346	fio_opt_str_set_fn *fn = o->cb;
	347
	348	if (fn)
	349	ret = fn(data);
	350	else {
	351	if (first)
	352	val_store(ilp, 1, o->off1, data);
	353	if (!more && o->off2)
	354	val_store(ilp, 1, o->off2, data);
	355	}
	356	break;
	357	}
	358	default:
	359	fprintf(stderr, "Bad option type %u\n", o->type);
	360	ret = 1;
	361	}
	362
	363	return ret;
	364	}
	365
	366	static int handle_option(struct fio_option o, const char ptr, void *data)
	367	{
	368	const char *ptr2 = NULL;
	369	int r1, r2;
	370
	371	/*
	372	* See if we have a second set of parameters, hidden after a comma.
	373	* Do this before parsing the first round, to check if we should
	374	* copy set 1 options to set 2.
	375	*/
	376	if (ptr &&
	377	(o->type != FIO_OPT_STR_STORE) &&
	378	(o->type != FIO_OPT_STR)) {
	379	ptr2 = strchr(ptr, ',');
	380	if (!ptr2)
	381	ptr2 = strchr(ptr, ':');
	382	}
	383
	384	/*
	385	* Don't return early if parsing the first option fails - if
	386	* we are doing multiple arguments, we can allow the first one
	387	* being empty.
	388	*/
	389	r1 = __handle_option(o, ptr, data, 1, !!ptr2);
	390
	391	if (!ptr2)
	392	return r1;
	393
	394	ptr2++;
	395	r2 = __handle_option(o, ptr2, data, 0, 0);
	396
	397	return r1 && r2;
	398	}
	399
	400	int parse_cmd_option(const char opt, const char val,
	401	struct fio_option options, void data)
	402	{
	403	struct fio_option *o;
	404
	405	o = find_option(options, opt);
	406	if (!o) {
	407	fprintf(stderr, "Bad option %s\n", opt);
	408	return 1;
	409	}
	410
	411	if (!handle_option(o, val, data))
	412	return 0;
	413
	414	fprintf(stderr, "fio: failed parsing %s=%s\n", opt, val);
	415	return 1;
	416	}
	417
	418	int parse_option(const char opt, struct fio_option options, void *data)
	419	{
	420	struct fio_option *o;
	421	char pre, post;
	422	char tmp[64];
	423
	424	strncpy(tmp, opt, sizeof(tmp) - 1);
	425
	426	pre = strchr(tmp, '=');
	427	if (pre) {
	428	post = pre;
	429	*pre = '\0';
	430	pre = tmp;
	431	post++;
	432	o = find_option(options, pre);
	433	} else {
	434	o = find_option(options, tmp);
	435	post = NULL;
	436	}
	437
	438	if (!o) {
	439	fprintf(stderr, "Bad option %s\n", tmp);
	440	return 1;
	441	}
	442
	443	if (!handle_option(o, post, data))
	444	return 0;
	445
	446	fprintf(stderr, "fio: failed parsing %s\n", opt);
	447	return 1;
	448	}
	449
	450	/*
	451	* Option match, levenshtein distance. Handy for not quite remembering what
	452	* the option name is.
	453	*/
	454	static int string_distance(const char s1, const char s2)
	455	{
	456	unsigned int s1_len = strlen(s1);
	457	unsigned int s2_len = strlen(s2);
	458	unsigned int p, q, *r;
	459	unsigned int i, j;
	460
	461	p = malloc(sizeof(unsigned int) * (s2_len + 1));
	462	q = malloc(sizeof(unsigned int) * (s2_len + 1));
	463
	464	p[0] = 0;
	465	for (i = 1; i <= s2_len; i++)
	466	p[i] = p[i - 1] + 1;
	467
	468	for (i = 1; i <= s1_len; i++) {
	469	q[0] = p[0] + 1;
	470	for (j = 1; j <= s2_len; j++) {
	471	unsigned int sub = p[j - 1];
	472
	473	if (s1[i - 1] != s2[j - 1])
	474	sub++;
	475
	476	q[j] = min(p[j] + 1, min(q[j - 1] + 1, sub));
	477	}
	478	r = p;
	479	p = q;
	480	q = r;
	481	}
	482
	483	i = p[s2_len];
	484	free(p);
	485	free(q);
	486	return i;
	487	}
	488
	489	static void show_option_help(struct fio_option *o)
	490	{
	491	const char *typehelp[] = {
	492	"string (opt=bla)",
	493	"string with possible k/m/g postfix (opt=4k)",
	494	"string with range and postfix (opt=1k-4k)",
	495	"string with time postfix (opt=10s)",
	496	"string (opt=bla)",
	497	"string with dual range (opt=1k-4k,4k-8k)",
	498	"integer value (opt=100)",
	499	"boolean value (opt=1)",
	500	"no argument (opt)",
	501	};
	502
	503	printf("%20s: %s\n", "type", typehelp[o->type]);
	504	printf("%20s: %s\n", "default", o->def ? o->def : "no default");
	505	show_option_range(o);
	506	show_option_values(o);
	507	}
	508
	509	int show_cmd_help(struct fio_option options, const char name)
	510	{
	511	struct fio_option o, closest;
	512	unsigned int best_dist;
	513	int found = 0;
	514	int show_all = 0;
	515
	516	if (!name \|\| !strcmp(name, "all"))
	517	show_all = 1;
	518
	519	closest = NULL;
	520	best_dist = -1;
	521	for (o = &options[0]; o->name; o++) {
	522	int match = 0;
	523
	524	if (name) {
	525	if (!strcmp(name, o->name))
	526	match = 1;
	527	else {
	528	unsigned int dist;
	529
	530	dist = string_distance(name, o->name);
	531	if (dist < best_dist) {
	532	best_dist = dist;
	533	closest = o;
	534	}
	535	}
	536	}
	537
	538	if (show_all \|\| match) {
	539	found = 1;
	540	if (match)
	541	printf("%20s: %s\n", o->name, o->help);
	542	if (show_all) {
	543	printf("%-20s: %s\n", o->name, o->help);
	544	continue;
	545	}
	546	}
	547
	548	if (!match)
	549	continue;
	550
	551	show_option_help(o);
	552	}
	553
	554	if (found)
	555	return 0;
	556
	557	printf("No such command: %s", name);
	558	if (closest) {
	559	printf(" - showing closest match\n");
	560	printf("%20s: %s\n", closest->name, closest->help);
	561	show_option_help(closest);
	562	} else
	563	printf("\n");
	564
	565	return 1;
	566	}
	567
	568	/*
	569	* Handle parsing of default parameters.
	570	*/
	571	void fill_default_options(void data, struct fio_option options)
	572	{
	573	struct fio_option *o;
	574
	575	for (o = &options[0]; o->name; o++)
	576	if (o->def)
	577	handle_option(o, o->def, data);
	578	}
	579
	580	/*
	581	* Sanitize the options structure. For now it just sets min/max for bool
	582	* values and whether both callback and offsets are given.
	583	*/
	584	void options_init(struct fio_option *options)
	585	{
	586	struct fio_option *o;
	587
	588	for (o = &options[0]; o->name; o++) {
	589	if (o->type == FIO_OPT_BOOL) {
	590	o->minval = 0;
	591	o->maxval = 1;
	592	}
	593	if (!o->cb && !o->off1)
	594	fprintf(stderr, "Option %s: neither cb nor offset given\n", o->name);
	595	if (o->type == FIO_OPT_STR \|\| o->type == FIO_OPT_STR_STORE)
	596	continue;
	597	if (o->cb && (o->off1 \|\| o->off2 \|\| o->off3 \|\| o->off4))
	598	fprintf(stderr, "Option %s: both cb and offset given\n", o->name);
	599	}
	600	}