[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 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;

		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:
		cp = td_var(data, o->off1);
		*cp = strdup(ptr);
		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)) {
		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;
}

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

	printf("%16s: 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;

	if (!o->posval)
		return;

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

		if (!i)
			printf("%16s: ", "valid values");

		printf("%s,", msg);
		i++;
	} while (1);

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

int show_cmd_help(struct fio_option *options, const char *name)
{
	int show_all = !strcmp(name, "all");
	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)",
	};
	struct fio_option *o;
	int found = 0;

	for (o = &options[0]; o->name; o++) {
		int match = !strcmp(name, o->name);

		if (show_all || match) {
			found = 1;
			printf("%16s: %s\n", o->name, o->help);
			if (show_all)
				continue;
		}

		if (!match)
			continue;

		printf("%16s: %s\n", "type", typehelp[o->type]);
		printf("%16s: %s\n", "default", o->def ? o->def : "no default");
		show_option_range(o);
		show_option_values(o);
	}

	if (found)
		return 0;

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