[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 <stdlib.h>

#include "parse.h"
#include "debug.h"
#include "options.h"

static struct fio_option *fio_options;
extern unsigned int fio_get_kb_base(void *);

static int vp_cmp(const void *p1, const void *p2)
{
	const struct value_pair *vp1 = p1;
	const struct value_pair *vp2 = p2;

	return strlen(vp2->ival) - strlen(vp1->ival);
}

static void posval_sort(struct fio_option *o, struct value_pair *vpmap)
{
	const struct value_pair *vp;
	int entries;

	memset(vpmap, 0, PARSE_MAX_VP * sizeof(struct value_pair));

	for (entries = 0; entries < PARSE_MAX_VP; entries++) {
		vp = &o->posval[entries];
		if (!vp->ival || vp->ival[0] == '\0')
			break;

		memcpy(&vpmap[entries], vp, sizeof(*vp));
	}

	qsort(vpmap, entries, sizeof(struct value_pair), vp_cmp);
}

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

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

static void show_option_values(struct fio_option *o)
{
	int i;

	for (i = 0; i < PARSE_MAX_VP; i++) {
		const struct value_pair *vp = &o->posval[i];

		if (!vp->ival)
			continue;

		printf("%20s: %-10s", i == 0 ? "valid values" : "", vp->ival);
		if (vp->help)
			printf(" %s", vp->help);
		printf("\n");
	}

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

static void show_option_help(struct fio_option *o, FILE *out)
{
	const char *typehelp[] = {
		"invalid",
		"string (opt=bla)",
		"string with possible k/m/g postfix (opt=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)",
		"deprecated",
	};

	if (o->alias)
		fprintf(out, "%20s: %s\n", "alias", o->alias);

	fprintf(out, "%20s: %s\n", "type", typehelp[o->type]);
	fprintf(out, "%20s: %s\n", "default", o->def ? o->def : "no default");
	if (o->prof_name)
		fprintf(out, "%20s: only for profile '%s'\n", "valid", o->prof_name);
	show_option_range(o, stdout);
	show_option_values(o);
}

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 long __get_mult_bytes(const char *p, void *data)
{
	unsigned int kb_base = fio_get_kb_base(data);
	unsigned long long ret = 1;
	unsigned int i, pow = 0, mult = kb_base;
	char *c;

	if (!p)
		return 1;

	c = strdup(p);

	for (i = 0; i < strlen(c); i++)
		c[i] = tolower(c[i]);

	if (!strcmp("pib", c)) {
		pow = 5;
		mult = 1000;
	} else if (!strcmp("tib", c)) {
		pow = 4;
		mult = 1000;
	} else if (!strcmp("gib", c)) {
		pow = 3;
		mult = 1000;
	} else if (!strcmp("mib", c)) {
		pow = 2;
		mult = 1000;
	} else if (!strcmp("kib", c)) {
		pow = 1;
		mult = 1000;
	} else if (!strcmp("p", c) || !strcmp("pb", c))
		pow = 5;
	else if (!strcmp("t", c) || !strcmp("tb", c))
		pow = 4;
	else if (!strcmp("g", c) || !strcmp("gb", c))
		pow = 3;
	else if (!strcmp("m", c) || !strcmp("mb", c))
		pow = 2;
	else if (!strcmp("k", c) || !strcmp("kb", c))
		pow = 1;

	while (pow--)
		ret *= (unsigned long long) mult;

	free(c);
	return ret;
}

static unsigned long long get_mult_bytes(const char *str, int len, void *data)
{
	const char *p;

	if (len < 2)
		return __get_mult_bytes(str, data);

	/*
	 * if the last char is 'b' or 'B', the user likely used
	 * "1gb" instead of just "1g". If the second to last is also
	 * a letter, adjust.
	 */
	p = str + len - 1;
	while (isalpha(*(p - 1)))
		p--;
	if (!isalpha(*p))
		p = NULL;

	return __get_mult_bytes(p, data);
}

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

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

	if (strstr(str, "0x") || strstr(str, "0X"))
		base = 16;
	else
		base = 10;

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

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

	return 0;
}

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

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

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

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

	*p = s;
}

void strip_blank_end(char *p)
{
	char *start = p, *s;

	s = strchr(p, ';');
	if (s)
		*s = '\0';
	s = strchr(p, '#');
	if (s)
		*s = '\0';
	if (s)
		p = s;

	s = p + strlen(p);
	while ((isspace(*s) || iscntrl(*s)) && (s > start))
		s--;

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

static int check_range_bytes(const char *str, long *val, void *data)
{
	long long __val;

	if (!str_to_decimal(str, &__val, 1, data)) {
		*val = __val;
		return 0;
	}

	return 1;
}

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

	return 1;
}

static int opt_len(const char *str)
{
	char *postfix;

	postfix = strchr(str, ':');
	if (!postfix)
		return strlen(str);

	return (int)(postfix - str);
}

#define val_store(ptr, val, off, or, data)		\
	do {						\
		ptr = td_var((data), (off));		\
		if ((or))				\
			*ptr |= (val);			\
		else					\
			*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;

	dprint(FD_PARSE, "__handle_option=%s, type=%d, ptr=%s\n", o->name,
							o->type, ptr);

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

	switch (o->type) {
	case FIO_OPT_STR:
	case FIO_OPT_STR_MULTI: {
		fio_opt_str_fn *fn = o->cb;
		const struct value_pair *vp;
		struct value_pair posval[PARSE_MAX_VP];
		int i, all_skipped = 1;

		posval_sort(o, posval);

		ret = 1;
		for (i = 0; i < PARSE_MAX_VP; i++) {
			vp = &posval[i];
			if (!vp->ival || vp->ival[0] == '\0')
				continue;
			all_skipped = 0;
			if (!strncmp(vp->ival, ptr, opt_len(ptr))) {
				ret = 0;
				if (o->roff1) {
					if (vp->or)
						*(unsigned int *) o->roff1 |= vp->oval;
					else
						*(unsigned int *) o->roff1 = vp->oval;
				} else {
					if (!o->off1)
						continue;
					val_store(ilp, vp->oval, o->off1, vp->or, data);
				}
				continue;
			}
		}

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

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

		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_INT) {
				if (first) {
					if (o->roff1)
						*(unsigned int *) o->roff1 = ull;
					else
						val_store(ilp, ull, o->off1, 0, data);
				}
				if (!more) {
					if (o->roff2)
						*(unsigned int *) o->roff2 = ull;
					else if (o->off2)
						val_store(ilp, ull, o->off2, 0, data);
				}
			} else {
				if (first) {
					if (o->roff1)
						*(unsigned long long *) o->roff1 = ull;
					else
						val_store(ullp, ull, o->off1, 0, data);
				}
				if (!more) {
					if (o->roff2)
						*(unsigned long long *) o->roff2 =  ull;
					else if (o->off2)
						val_store(ullp, ull, o->off2, 0, data);
				}
			}
		}
		break;
	}
	case FIO_OPT_STR_STORE: {
		fio_opt_str_fn *fn = o->cb;

		if (o->roff1)
			cp = (char **) o->roff1;
		else
			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, data) &&
		    !check_range_bytes(p2, &ul2, data)) {
			ret = 0;
			if (ul1 > ul2) {
				unsigned long foo = ul1;

				ul1 = ul2;
				ul2 = foo;
			}

			if (first) {
				if (o->roff1)
					*(unsigned int *) o->roff1 = ul1;
				else
					val_store(ilp, ul1, o->off1, 0, data);
				if (o->roff2)
					*(unsigned int *) o->roff2 = ul2;
				else
					val_store(ilp, ul2, o->off2, 0, data);
			}
			if (o->roff3 && o->roff4) {
				*(unsigned int *) o->roff3 = ul1;
				*(unsigned int *) o->roff4 = ul2;
			} else if (o->off3 && o->off4) {
				val_store(ilp, ul1, o->off3, 0, data);
				val_store(ilp, ul2, o->off4, 0, data);
			}
		}

		break;
	}
	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) {
				if (o->roff1)
					*(unsigned int *)o->roff1 = il;
				else
					val_store(ilp, il, o->off1, 0, data);
			}
			if (!more) {
				if (o->roff2)
					*(unsigned int *) o->roff2 = il;
				else if (o->off2)
					val_store(ilp, il, o->off2, 0, data);
			}
		}
		break;
	}
	case FIO_OPT_STR_SET: {
		fio_opt_str_set_fn *fn = o->cb;

		if (fn)
			ret = fn(data);
		else {
			if (first) {
				if (o->roff1)
					*(unsigned int *) o->roff1 = 1;
				else
					val_store(ilp, 1, o->off1, 0, data);
			}
			if (!more) {
				if (o->roff2)
					*(unsigned int *) o->roff2 = 1;
				else if (o->off2)
					val_store(ilp, 1, o->off2, 0, data);
			}
		}
		break;
	}
	case FIO_OPT_DEPRECATED:
		fprintf(stdout, "Option %s is deprecated\n", o->name);
		break;
	default:
		fprintf(stderr, "Bad option type %u\n", o->type);
		ret = 1;
	}

	if (ret)
		return ret;

	if (o->verify) {
		ret = o->verify(o, data);
		if (ret) {
			fprintf(stderr,"Correct format for offending option\n");
			fprintf(stderr, "%20s: %s\n", o->name, o->help);
			show_option_help(o, stderr);
		}
	}

	return ret;
}

static int handle_option(struct fio_option *o, const char *__ptr, void *data)
{
	char *o_ptr, *ptr, *ptr2;
	int ret, done;

	dprint(FD_PARSE, "handle_option=%s, ptr=%s\n", o->name, __ptr);

	o_ptr = ptr = NULL;
	if (__ptr)
		o_ptr = ptr = strdup(__ptr);

	/*
	 * See if we have another set of parameters, hidden after a comma.
	 * Do this before parsing this round, to check if we should
	 * copy set 1 options to set 2.
	 */
	done = 0;
	ret = 1;
	do {
		int __ret;

		ptr2 = NULL;
		if (ptr &&
		    (o->type != FIO_OPT_STR_STORE) &&
		    (o->type != FIO_OPT_STR)) {
			ptr2 = strchr(ptr, ',');
			if (ptr2 && *(ptr2 + 1) == '\0')
				*ptr2 = '\0';
			if (o->type != FIO_OPT_STR_MULTI) {
				if (!ptr2)
					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.
		 */
		__ret = __handle_option(o, ptr, data, !done, !!ptr2);
		if (ret)
			ret = __ret;

		if (!ptr2)
			break;

		ptr = ptr2 + 1;
		done++;
	} while (1);

	if (o_ptr)
		free(o_ptr);
	return ret;
}

static struct fio_option *get_option(const char *opt,
				     struct fio_option *options, char **post)
{
	struct fio_option *o;
	char *ret;

	ret = strchr(opt, '=');
	if (ret) {
		*post = ret;
		*ret = '\0';
		ret = (char *) opt;
		(*post)++;
		strip_blank_end(ret);
		o = find_option(options, ret);
	} else {
		o = find_option(options, opt);
		*post = NULL;
	}

	return o;
}

static int opt_cmp(const void *p1, const void *p2)
{
	struct fio_option *o1, *o2;
	char *s1, *s2, *foo;
	int prio1, prio2;

	s1 = strdup(*((char **) p1));
	s2 = strdup(*((char **) p2));

	o1 = get_option(s1, fio_options, &foo);
	o2 = get_option(s2, fio_options, &foo);

	prio1 = prio2 = 0;
	if (o1)
		prio1 = o1->prio;
	if (o2)
		prio2 = o2->prio;

	free(s1);
	free(s2);
	return prio2 - prio1;
}

void sort_options(char **opts, struct fio_option *options, int num_opts)
{
	fio_options = options;
	qsort(opts, num_opts, sizeof(char *), opt_cmp);
	fio_options = NULL;
}

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;
}

/*
 * Return a copy of the input string with substrings of the form ${VARNAME}
 * substituted with the value of the environment variable VARNAME.  The
 * substitution always occurs, even if VARNAME is empty or the corresponding
 * environment variable undefined.
 */
static char *option_dup_subs(const char *opt)
{
	char out[OPT_LEN_MAX+1];
	char in[OPT_LEN_MAX+1];
	char *outptr = out;
	char *inptr = in;
	char *ch1, *ch2, *env;
	ssize_t nchr = OPT_LEN_MAX;
	size_t envlen;

	if (strlen(opt) + 1 > OPT_LEN_MAX) {
		fprintf(stderr, "OPT_LEN_MAX (%d) is too small\n", OPT_LEN_MAX);
		return NULL;
	}

	in[OPT_LEN_MAX] = '\0';
	strncpy(in, opt, OPT_LEN_MAX);

	while (*inptr && nchr > 0) {
		if (inptr[0] == '$' && inptr[1] == '{') {
			ch2 = strchr(inptr, '}');
			if (ch2 && inptr+1 < ch2) {
				ch1 = inptr+2;
				inptr = ch2+1;
				*ch2 = '\0';

				env = getenv(ch1);
				if (env) {
					envlen = strlen(env);
					if (envlen <= nchr) {
						memcpy(outptr, env, envlen);
						outptr += envlen;
						nchr -= envlen;
					}
				}

				continue;
			}
		}

		*outptr++ = *inptr++;
		--nchr;
	}

	*outptr = '\0';
	return strdup(out);
}

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

	tmp = option_dup_subs(opt);
	if (!tmp)
		return 1;

	o = get_option(tmp, options, &post);
	if (!o) {
		fprintf(stderr, "Bad option <%s>\n", tmp);
		free(tmp);
		return 1;
	}

	if (!handle_option(o, post, data)) {
		free(tmp);
		return 0;
	}

	fprintf(stderr, "fio: failed parsing %s\n", opt);
	free(tmp);
	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 struct fio_option *find_child(struct fio_option *options,
				     struct fio_option *o)
{
	struct fio_option *__o;

	for (__o = options + 1; __o->name; __o++)
		if (__o->parent && !strcmp(__o->parent, o->name))
			return __o;

	return NULL;
}

static void __print_option(struct fio_option *o, struct fio_option *org,
			   int level)
{
	char name[256], *p;
	int depth;

	if (!o)
		return;
	if (!org)
		org = o;

	p = name;
	depth = level;
	while (depth--)
		p += sprintf(p, "%s", "  ");

	sprintf(p, "%s", o->name);

	printf("%-24s: %s\n", name, o->help);
}

static void print_option(struct fio_option *o)
{
	struct fio_option *parent;
	struct fio_option *__o;
	unsigned int printed;
	unsigned int level;

	__print_option(o, NULL, 0);
	parent = o;
	level = 0;
	do {
		level++;
		printed = 0;

		while ((__o = find_child(o, parent)) != NULL) {
			__print_option(__o, o, level);
			o = __o;
			printed++;
		}

		parent = o;
	} while (printed);
}

int show_cmd_help(struct fio_option *options, const char *name)
{
	struct fio_option *o, *closest;
	unsigned int best_dist = -1U;
	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 (o->type == FIO_OPT_DEPRECATED)
			continue;
		if (!exec_profile && o->prof_name)
			continue;

		if (name) {
			if (!strcmp(name, o->name) ||
			    (o->alias && !strcmp(name, o->alias)))
				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) {
				if (!o->parent)
					print_option(o);
				continue;
			}
		}

		if (!match)
			continue;

		show_option_help(o, stdout);
	}

	if (found)
		return 0;

	printf("No such command: %s", name);

	/*
	 * Only print an appropriately close option, one where the edit
	 * distance isn't too big. Otherwise we get crazy matches.
	 */
	if (closest && best_dist < 3) {
		printf(" - showing closest match\n");
		printf("%20s: %s\n", closest->name, closest->help);
		show_option_help(closest, stdout);
	} else
		printf("\n");

	return 1;
}

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

	dprint(FD_PARSE, "filling default options\n");

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

void option_init(struct fio_option *o)
{
	if (o->type == FIO_OPT_DEPRECATED)
		return;
	if (o->type == FIO_OPT_BOOL) {
		o->minval = 0;
		o->maxval = 1;
	}
	if (o->type == FIO_OPT_STR_SET && o->def) {
		fprintf(stderr, "Option %s: string set option with"
				" default will always be true\n", o->name);
	}
	if (!o->cb && (!o->off1 && !o->roff1)) {
		fprintf(stderr, "Option %s: neither cb nor offset given\n",
							o->name);
	}
	if (o->type == FIO_OPT_STR || o->type == FIO_OPT_STR_STORE ||
	    o->type == FIO_OPT_STR_MULTI)
		return;
	if (o->cb && ((o->off1 || o->off2 || o->off3 || o->off4) ||
		      (o->roff1 || o->roff2 || o->roff3 || o->roff4))) {
		fprintf(stderr, "Option %s: both cb and offset given\n",
							 o->name);
	}
}

/*
 * 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;

	dprint(FD_PARSE, "init options\n");

	for (o = &options[0]; o->name; o++)
		option_init(o);
}
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	#include <stdlib.h>
	12
	13	#include "parse.h"
	14	#include "debug.h"
	15	#include "options.h"
	16
	17	static struct fio_option *fio_options;
	18	extern unsigned int fio_get_kb_base(void *);
	19
	20	static int vp_cmp(const void p1, const void p2)
	21	{
	22	const struct value_pair *vp1 = p1;
	23	const struct value_pair *vp2 = p2;
	24
	25	return strlen(vp2->ival) - strlen(vp1->ival);
	26	}
	27
	28	static void posval_sort(struct fio_option o, struct value_pair vpmap)
	29	{
	30	const struct value_pair *vp;
	31	int entries;
	32
	33	memset(vpmap, 0, PARSE_MAX_VP * sizeof(struct value_pair));
	34
	35	for (entries = 0; entries < PARSE_MAX_VP; entries++) {
	36	vp = &o->posval[entries];
	37	if (!vp->ival \|\| vp->ival[0] == '\0')
	38	break;
	39
	40	memcpy(&vpmap[entries], vp, sizeof(*vp));
	41	}
	42
	43	qsort(vpmap, entries, sizeof(struct value_pair), vp_cmp);
	44	}
	45
	46	static void show_option_range(struct fio_option o, FILE out)
	47	{
	48	if (!o->minval && !o->maxval)
	49	return;
	50
	51	fprintf(out, "%20s: min=%d", "range", o->minval);
	52	if (o->maxval)
	53	fprintf(out, ", max=%d", o->maxval);
	54	fprintf(out, "\n");
	55	}
	56
	57	static void show_option_values(struct fio_option *o)
	58	{
	59	int i;
	60
	61	for (i = 0; i < PARSE_MAX_VP; i++) {
	62	const struct value_pair *vp = &o->posval[i];
	63
	64	if (!vp->ival)
	65	continue;
	66
	67	printf("%20s: %-10s", i == 0 ? "valid values" : "", vp->ival);
	68	if (vp->help)
	69	printf(" %s", vp->help);
	70	printf("\n");
	71	}
	72
	73	if (i)
	74	printf("\n");
	75	}
	76
	77	static void show_option_help(struct fio_option o, FILE out)
	78	{
	79	const char *typehelp[] = {
	80	"invalid",
	81	"string (opt=bla)",
	82	"string with possible k/m/g postfix (opt=4k)",
	83	"string with time postfix (opt=10s)",
	84	"string (opt=bla)",
	85	"string with dual range (opt=1k-4k,4k-8k)",
	86	"integer value (opt=100)",
	87	"boolean value (opt=1)",
	88	"no argument (opt)",
	89	"deprecated",
	90	};
	91
	92	if (o->alias)
	93	fprintf(out, "%20s: %s\n", "alias", o->alias);
	94
	95	fprintf(out, "%20s: %s\n", "type", typehelp[o->type]);
	96	fprintf(out, "%20s: %s\n", "default", o->def ? o->def : "no default");
	97	if (o->prof_name)
	98	fprintf(out, "%20s: only for profile '%s'\n", "valid", o->prof_name);
	99	show_option_range(o, stdout);
	100	show_option_values(o);
	101	}
	102
	103	static unsigned long get_mult_time(char c)
	104	{
	105	switch (c) {
	106	case 'm':
	107	case 'M':
	108	return 60;
	109	case 'h':
	110	case 'H':
	111	return 60 * 60;
	112	case 'd':
	113	case 'D':
	114	return 24 * 60 * 60;
	115	default:
	116	return 1;
	117	}
	118	}
	119
	120	static unsigned long long __get_mult_bytes(const char p, void data)
	121	{
	122	unsigned int kb_base = fio_get_kb_base(data);
	123	unsigned long long ret = 1;
	124	unsigned int i, pow = 0, mult = kb_base;
	125	char *c;
	126
	127	if (!p)
	128	return 1;
	129
	130	c = strdup(p);
	131
	132	for (i = 0; i < strlen(c); i++)
	133	c[i] = tolower(c[i]);
	134
	135	if (!strcmp("pib", c)) {
	136	pow = 5;
	137	mult = 1000;
	138	} else if (!strcmp("tib", c)) {
	139	pow = 4;
	140	mult = 1000;
	141	} else if (!strcmp("gib", c)) {
	142	pow = 3;
	143	mult = 1000;
	144	} else if (!strcmp("mib", c)) {
	145	pow = 2;
	146	mult = 1000;
	147	} else if (!strcmp("kib", c)) {
	148	pow = 1;
	149	mult = 1000;
	150	} else if (!strcmp("p", c) \|\| !strcmp("pb", c))
	151	pow = 5;
	152	else if (!strcmp("t", c) \|\| !strcmp("tb", c))
	153	pow = 4;
	154	else if (!strcmp("g", c) \|\| !strcmp("gb", c))
	155	pow = 3;
	156	else if (!strcmp("m", c) \|\| !strcmp("mb", c))
	157	pow = 2;
	158	else if (!strcmp("k", c) \|\| !strcmp("kb", c))
	159	pow = 1;
	160
	161	while (pow--)
	162	ret *= (unsigned long long) mult;
	163
	164	free(c);
	165	return ret;
	166	}
	167
	168	static unsigned long long get_mult_bytes(const char str, int len, void data)
	169	{
	170	const char *p;
	171
	172	if (len < 2)
	173	return __get_mult_bytes(str, data);
	174
	175	/*
	176	* if the last char is 'b' or 'B', the user likely used
	177	* "1gb" instead of just "1g". If the second to last is also
	178	* a letter, adjust.
	179	*/
	180	p = str + len - 1;
	181	while (isalpha(*(p - 1)))
	182	p--;
	183	if (!isalpha(*p))
	184	p = NULL;
	185
	186	return __get_mult_bytes(p, data);
	187	}
	188
	189	/*
	190	* convert string into decimal value, noting any size suffix
	191	*/
	192	int str_to_decimal(const char str, long long val, int kilo, void *data)
	193	{
	194	int len, base;
	195
	196	len = strlen(str);
	197	if (!len)
	198	return 1;
	199
	200	if (strstr(str, "0x") \|\| strstr(str, "0X"))
	201	base = 16;
	202	else
	203	base = 10;
	204
	205	*val = strtoll(str, NULL, base);
	206	if (*val == LONG_MAX && errno == ERANGE)
	207	return 1;
	208
	209	if (kilo)
	210	val = get_mult_bytes(str, len, data);
	211	else
	212	val = get_mult_time(str[len - 1]);
	213
	214	return 0;
	215	}
	216
	217	static int check_str_bytes(const char p, long long val, void *data)
	218	{
	219	return str_to_decimal(p, val, 1, data);
	220	}
	221
	222	static int check_str_time(const char p, long long val)
	223	{
	224	return str_to_decimal(p, val, 0, NULL);
	225	}
	226
	227	void strip_blank_front(char **p)
	228	{
	229	char s = p;
	230
	231	while (isspace(*s))
	232	s++;
	233
	234	*p = s;
	235	}
	236
	237	void strip_blank_end(char *p)
	238	{
	239	char start = p, s;
	240
	241	s = strchr(p, ';');
	242	if (s)
	243	*s = '\0';
	244	s = strchr(p, '#');
	245	if (s)
	246	*s = '\0';
	247	if (s)
	248	p = s;
	249
	250	s = p + strlen(p);
	251	while ((isspace(s) \|\| iscntrl(s)) && (s > start))
	252	s--;
	253
	254	*(s + 1) = '\0';
	255	}
	256
	257	static int check_range_bytes(const char str, long val, void *data)
	258	{
	259	long long __val;
	260
	261	if (!str_to_decimal(str, &__val, 1, data)) {
	262	*val = __val;
	263	return 0;
	264	}
	265
	266	return 1;
	267	}
	268
	269	static int check_int(const char p, int val)
	270	{
	271	if (!strlen(p))
	272	return 1;
	273	if (strstr(p, "0x") \|\| strstr(p, "0X")) {
	274	if (sscanf(p, "%x", val) == 1)
	275	return 0;
	276	} else {
	277	if (sscanf(p, "%u", val) == 1)
	278	return 0;
	279	}
	280
	281	return 1;
	282	}
	283
	284	static int opt_len(const char *str)
	285	{
	286	char *postfix;
	287
	288	postfix = strchr(str, ':');
	289	if (!postfix)
	290	return strlen(str);
	291
	292	return (int)(postfix - str);
	293	}
	294
	295	#define val_store(ptr, val, off, or, data) \
	296	do { \
	297	ptr = td_var((data), (off)); \
	298	if ((or)) \
	299	*ptr \|= (val); \
	300	else \
	301	*ptr = (val); \
	302	} while (0)
	303
	304	static int __handle_option(struct fio_option o, const char ptr, void *data,
	305	int first, int more)
	306	{
	307	int il, *ilp;
	308	long long ull, *ullp;
	309	long ul1, ul2;
	310	char **cp;
	311	int ret = 0, is_time = 0;
	312
	313	dprint(FD_PARSE, "__handle_option=%s, type=%d, ptr=%s\n", o->name,
	314	o->type, ptr);
	315
	316	if (!ptr && o->type != FIO_OPT_STR_SET && o->type != FIO_OPT_STR) {
	317	fprintf(stderr, "Option %s requires an argument\n", o->name);
	318	return 1;
	319	}
	320
	321	switch (o->type) {
	322	case FIO_OPT_STR:
	323	case FIO_OPT_STR_MULTI: {
	324	fio_opt_str_fn *fn = o->cb;
	325	const struct value_pair *vp;
	326	struct value_pair posval[PARSE_MAX_VP];
	327	int i, all_skipped = 1;
	328
	329	posval_sort(o, posval);
	330
	331	ret = 1;
	332	for (i = 0; i < PARSE_MAX_VP; i++) {
	333	vp = &posval[i];
	334	if (!vp->ival \|\| vp->ival[0] == '\0')
	335	continue;
	336	all_skipped = 0;
	337	if (!strncmp(vp->ival, ptr, opt_len(ptr))) {
	338	ret = 0;
	339	if (o->roff1) {
	340	if (vp->or)
	341	(unsigned int ) o->roff1 \|= vp->oval;
	342	else
	343	(unsigned int ) o->roff1 = vp->oval;
	344	} else {
	345	if (!o->off1)
	346	continue;
	347	val_store(ilp, vp->oval, o->off1, vp->or, data);
	348	}
	349	continue;
	350	}
	351	}
	352
	353	if (ret && !all_skipped)
	354	show_option_values(o);
	355	else if (fn)
	356	ret = fn(data, ptr);
	357	break;
	358	}
	359	case FIO_OPT_STR_VAL_TIME:
	360	is_time = 1;
	361	case FIO_OPT_INT:
	362	case FIO_OPT_STR_VAL: {
	363	fio_opt_str_val_fn *fn = o->cb;
	364
	365	if (is_time)
	366	ret = check_str_time(ptr, &ull);
	367	else
	368	ret = check_str_bytes(ptr, &ull, data);
	369
	370	if (ret)
	371	break;
	372
	373	if (o->maxval && ull > o->maxval) {
	374	fprintf(stderr, "max value out of range: %lld"
	375	" (%d max)\n", ull, o->maxval);
	376	return 1;
	377	}
	378	if (o->minval && ull < o->minval) {
	379	fprintf(stderr, "min value out of range: %lld"
	380	" (%d min)\n", ull, o->minval);
	381	return 1;
	382	}
	383
	384	if (fn)
	385	ret = fn(data, &ull);
	386	else {
	387	if (o->type == FIO_OPT_INT) {
	388	if (first) {
	389	if (o->roff1)
	390	(unsigned int ) o->roff1 = ull;
	391	else
	392	val_store(ilp, ull, o->off1, 0, data);
	393	}
	394	if (!more) {
	395	if (o->roff2)
	396	(unsigned int ) o->roff2 = ull;
	397	else if (o->off2)
	398	val_store(ilp, ull, o->off2, 0, data);
	399	}
	400	} else {
	401	if (first) {
	402	if (o->roff1)
	403	(unsigned long long ) o->roff1 = ull;
	404	else
	405	val_store(ullp, ull, o->off1, 0, data);
	406	}
	407	if (!more) {
	408	if (o->roff2)
	409	(unsigned long long ) o->roff2 = ull;
	410	else if (o->off2)
	411	val_store(ullp, ull, o->off2, 0, data);
	412	}
	413	}
	414	}
	415	break;
	416	}
	417	case FIO_OPT_STR_STORE: {
	418	fio_opt_str_fn *fn = o->cb;
	419
	420	if (o->roff1)
	421	cp = (char **) o->roff1;
	422	else
	423	cp = td_var(data, o->off1);
	424
	425	*cp = strdup(ptr);
	426	if (fn) {
	427	ret = fn(data, ptr);
	428	if (ret) {
	429	free(*cp);
	430	*cp = NULL;
	431	}
	432	}
	433	break;
	434	}
	435	case FIO_OPT_RANGE: {
	436	char tmp[128];
	437	char p1, p2;
	438
	439	strncpy(tmp, ptr, sizeof(tmp) - 1);
	440
	441	p1 = strchr(tmp, '-');
	442	if (!p1) {
	443	p1 = strchr(tmp, ':');
	444	if (!p1) {
	445	ret = 1;
	446	break;
	447	}
	448	}
	449
	450	p2 = p1 + 1;
	451	*p1 = '\0';
	452	p1 = tmp;
	453
	454	ret = 1;
	455	if (!check_range_bytes(p1, &ul1, data) &&
	456	!check_range_bytes(p2, &ul2, data)) {
	457	ret = 0;
	458	if (ul1 > ul2) {
	459	unsigned long foo = ul1;
	460
	461	ul1 = ul2;
	462	ul2 = foo;
	463	}
	464
	465	if (first) {
	466	if (o->roff1)
	467	(unsigned int ) o->roff1 = ul1;
	468	else
	469	val_store(ilp, ul1, o->off1, 0, data);
	470	if (o->roff2)
	471	(unsigned int ) o->roff2 = ul2;
	472	else
	473	val_store(ilp, ul2, o->off2, 0, data);
	474	}
	475	if (o->roff3 && o->roff4) {
	476	(unsigned int ) o->roff3 = ul1;
	477	(unsigned int ) o->roff4 = ul2;
	478	} else if (o->off3 && o->off4) {
	479	val_store(ilp, ul1, o->off3, 0, data);
	480	val_store(ilp, ul2, o->off4, 0, data);
	481	}
	482	}
	483
	484	break;
	485	}
	486	case FIO_OPT_BOOL: {
	487	fio_opt_int_fn *fn = o->cb;
	488
	489	ret = check_int(ptr, &il);
	490	if (ret)
	491	break;
	492
	493	if (o->maxval && il > (int) o->maxval) {
	494	fprintf(stderr, "max value out of range: %d (%d max)\n",
	495	il, o->maxval);
	496	return 1;
	497	}
	498	if (o->minval && il < o->minval) {
	499	fprintf(stderr, "min value out of range: %d (%d min)\n",
	500	il, o->minval);
	501	return 1;
	502	}
	503
	504	if (o->neg)
	505	il = !il;
	506
	507	if (fn)
	508	ret = fn(data, &il);
	509	else {
	510	if (first) {
	511	if (o->roff1)
	512	(unsigned int )o->roff1 = il;
	513	else
	514	val_store(ilp, il, o->off1, 0, data);
	515	}
	516	if (!more) {
	517	if (o->roff2)
	518	(unsigned int ) o->roff2 = il;
	519	else if (o->off2)
	520	val_store(ilp, il, o->off2, 0, data);
	521	}
	522	}
	523	break;
	524	}
	525	case FIO_OPT_STR_SET: {
	526	fio_opt_str_set_fn *fn = o->cb;
	527
	528	if (fn)
	529	ret = fn(data);
	530	else {
	531	if (first) {
	532	if (o->roff1)
	533	(unsigned int ) o->roff1 = 1;
	534	else
	535	val_store(ilp, 1, o->off1, 0, data);
	536	}
	537	if (!more) {
	538	if (o->roff2)
	539	(unsigned int ) o->roff2 = 1;
	540	else if (o->off2)
	541	val_store(ilp, 1, o->off2, 0, data);
	542	}
	543	}
	544	break;
	545	}
	546	case FIO_OPT_DEPRECATED:
	547	fprintf(stdout, "Option %s is deprecated\n", o->name);
	548	break;
	549	default:
	550	fprintf(stderr, "Bad option type %u\n", o->type);
	551	ret = 1;
	552	}
	553
	554	if (ret)
	555	return ret;
	556
	557	if (o->verify) {
	558	ret = o->verify(o, data);
	559	if (ret) {
	560	fprintf(stderr,"Correct format for offending option\n");
	561	fprintf(stderr, "%20s: %s\n", o->name, o->help);
	562	show_option_help(o, stderr);
	563	}
	564	}
	565
	566	return ret;
	567	}
	568
	569	static int handle_option(struct fio_option o, const char __ptr, void *data)
	570	{
	571	char o_ptr, ptr, *ptr2;
	572	int ret, done;
	573
	574	dprint(FD_PARSE, "handle_option=%s, ptr=%s\n", o->name, __ptr);
	575
	576	o_ptr = ptr = NULL;
	577	if (__ptr)
	578	o_ptr = ptr = strdup(__ptr);
	579
	580	/*
	581	* See if we have another set of parameters, hidden after a comma.
	582	* Do this before parsing this round, to check if we should
	583	* copy set 1 options to set 2.
	584	*/
	585	done = 0;
	586	ret = 1;
	587	do {
	588	int __ret;
	589
	590	ptr2 = NULL;
	591	if (ptr &&
	592	(o->type != FIO_OPT_STR_STORE) &&
	593	(o->type != FIO_OPT_STR)) {
	594	ptr2 = strchr(ptr, ',');
	595	if (ptr2 && *(ptr2 + 1) == '\0')
	596	*ptr2 = '\0';
	597	if (o->type != FIO_OPT_STR_MULTI) {
	598	if (!ptr2)
	599	ptr2 = strchr(ptr, ':');
	600	if (!ptr2)
	601	ptr2 = strchr(ptr, '-');
	602	}
	603	}
	604
	605	/*
	606	* Don't return early if parsing the first option fails - if
	607	* we are doing multiple arguments, we can allow the first one
	608	* being empty.
	609	*/
	610	__ret = __handle_option(o, ptr, data, !done, !!ptr2);
	611	if (ret)
	612	ret = __ret;
	613
	614	if (!ptr2)
	615	break;
	616
	617	ptr = ptr2 + 1;
	618	done++;
	619	} while (1);
	620
	621	if (o_ptr)
	622	free(o_ptr);
	623	return ret;
	624	}
	625
	626	static struct fio_option get_option(const char opt,
	627	struct fio_option options, char *post)
	628	{
	629	struct fio_option *o;
	630	char *ret;
	631
	632	ret = strchr(opt, '=');
	633	if (ret) {
	634	*post = ret;
	635	*ret = '\0';
	636	ret = (char *) opt;
	637	(*post)++;
	638	strip_blank_end(ret);
	639	o = find_option(options, ret);
	640	} else {
	641	o = find_option(options, opt);
	642	*post = NULL;
	643	}
	644
	645	return o;
	646	}
	647
	648	static int opt_cmp(const void p1, const void p2)
	649	{
	650	struct fio_option o1, o2;
	651	char s1, s2, *foo;
	652	int prio1, prio2;
	653
	654	s1 = strdup(((char *) p1));
	655	s2 = strdup(((char *) p2));
	656
	657	o1 = get_option(s1, fio_options, &foo);
	658	o2 = get_option(s2, fio_options, &foo);
	659
	660	prio1 = prio2 = 0;
	661	if (o1)
	662	prio1 = o1->prio;
	663	if (o2)
	664	prio2 = o2->prio;
	665
	666	free(s1);
	667	free(s2);
	668	return prio2 - prio1;
	669	}
	670
	671	void sort_options(char *opts, struct fio_option options, int num_opts)
	672	{
	673	fio_options = options;
	674	qsort(opts, num_opts, sizeof(char *), opt_cmp);
	675	fio_options = NULL;
	676	}
	677
	678	int parse_cmd_option(const char opt, const char val,
	679	struct fio_option options, void data)
	680	{
	681	struct fio_option *o;
	682
	683	o = find_option(options, opt);
	684	if (!o) {
	685	fprintf(stderr, "Bad option <%s>\n", opt);
	686	return 1;
	687	}
	688
	689	if (!handle_option(o, val, data))
	690	return 0;
	691
	692	fprintf(stderr, "fio: failed parsing %s=%s\n", opt, val);
	693	return 1;
	694	}
	695
	696	/*
	697	* Return a copy of the input string with substrings of the form ${VARNAME}
	698	* substituted with the value of the environment variable VARNAME. The
	699	* substitution always occurs, even if VARNAME is empty or the corresponding
	700	* environment variable undefined.
	701	*/
	702	static char option_dup_subs(const char opt)
	703	{
	704	char out[OPT_LEN_MAX+1];
	705	char in[OPT_LEN_MAX+1];
	706	char *outptr = out;
	707	char *inptr = in;
	708	char ch1, ch2, *env;
	709	ssize_t nchr = OPT_LEN_MAX;
	710	size_t envlen;
	711
	712	if (strlen(opt) + 1 > OPT_LEN_MAX) {
	713	fprintf(stderr, "OPT_LEN_MAX (%d) is too small\n", OPT_LEN_MAX);
	714	return NULL;
	715	}
	716
	717	in[OPT_LEN_MAX] = '\0';
	718	strncpy(in, opt, OPT_LEN_MAX);
	719
	720	while (*inptr && nchr > 0) {
	721	if (inptr[0] == '$' && inptr[1] == '{') {
	722	ch2 = strchr(inptr, '}');
	723	if (ch2 && inptr+1 < ch2) {
	724	ch1 = inptr+2;
	725	inptr = ch2+1;
	726	*ch2 = '\0';
	727
	728	env = getenv(ch1);
	729	if (env) {
	730	envlen = strlen(env);
	731	if (envlen <= nchr) {
	732	memcpy(outptr, env, envlen);
	733	outptr += envlen;
	734	nchr -= envlen;
	735	}
	736	}
	737
	738	continue;
	739	}
	740	}
	741
	742	outptr++ = inptr++;
	743	--nchr;
	744	}
	745
	746	*outptr = '\0';
	747	return strdup(out);
	748	}
	749
	750	int parse_option(const char opt, struct fio_option options, void *data)
	751	{
	752	struct fio_option *o;
	753	char post, tmp;
	754
	755	tmp = option_dup_subs(opt);
	756	if (!tmp)
	757	return 1;
	758
	759	o = get_option(tmp, options, &post);
	760	if (!o) {
	761	fprintf(stderr, "Bad option <%s>\n", tmp);
	762	free(tmp);
	763	return 1;
	764	}
	765
	766	if (!handle_option(o, post, data)) {
	767	free(tmp);
	768	return 0;
	769	}
	770
	771	fprintf(stderr, "fio: failed parsing %s\n", opt);
	772	free(tmp);
	773	return 1;
	774	}
	775
	776	/*
	777	* Option match, levenshtein distance. Handy for not quite remembering what
	778	* the option name is.
	779	*/
	780	static int string_distance(const char s1, const char s2)
	781	{
	782	unsigned int s1_len = strlen(s1);
	783	unsigned int s2_len = strlen(s2);
	784	unsigned int p, q, *r;
	785	unsigned int i, j;
	786
	787	p = malloc(sizeof(unsigned int) * (s2_len + 1));
	788	q = malloc(sizeof(unsigned int) * (s2_len + 1));
	789
	790	p[0] = 0;
	791	for (i = 1; i <= s2_len; i++)
	792	p[i] = p[i - 1] + 1;
	793
	794	for (i = 1; i <= s1_len; i++) {
	795	q[0] = p[0] + 1;
	796	for (j = 1; j <= s2_len; j++) {
	797	unsigned int sub = p[j - 1];
	798
	799	if (s1[i - 1] != s2[j - 1])
	800	sub++;
	801
	802	q[j] = min(p[j] + 1, min(q[j - 1] + 1, sub));
	803	}
	804	r = p;
	805	p = q;
	806	q = r;
	807	}
	808
	809	i = p[s2_len];
	810	free(p);
	811	free(q);
	812	return i;
	813	}
	814
	815	static struct fio_option find_child(struct fio_option options,
	816	struct fio_option *o)
	817	{
	818	struct fio_option *__o;
	819
	820	for (__o = options + 1; __o->name; __o++)
	821	if (__o->parent && !strcmp(__o->parent, o->name))
	822	return __o;
	823
	824	return NULL;
	825	}
	826
	827	static void __print_option(struct fio_option o, struct fio_option org,
	828	int level)
	829	{
	830	char name[256], *p;
	831	int depth;
	832
	833	if (!o)
	834	return;
	835	if (!org)
	836	org = o;
	837
	838	p = name;
	839	depth = level;
	840	while (depth--)
	841	p += sprintf(p, "%s", " ");
	842
	843	sprintf(p, "%s", o->name);
	844
	845	printf("%-24s: %s\n", name, o->help);
	846	}
	847
	848	static void print_option(struct fio_option *o)
	849	{
	850	struct fio_option *parent;
	851	struct fio_option *__o;
	852	unsigned int printed;
	853	unsigned int level;
	854
	855	__print_option(o, NULL, 0);
	856	parent = o;
	857	level = 0;
	858	do {
	859	level++;
	860	printed = 0;
	861
	862	while ((__o = find_child(o, parent)) != NULL) {
	863	__print_option(__o, o, level);
	864	o = __o;
	865	printed++;
	866	}
	867
	868	parent = o;
	869	} while (printed);
	870	}
	871
	872	int show_cmd_help(struct fio_option options, const char name)
	873	{
	874	struct fio_option o, closest;
	875	unsigned int best_dist = -1U;
	876	int found = 0;
	877	int show_all = 0;
	878
	879	if (!name \|\| !strcmp(name, "all"))
	880	show_all = 1;
	881
	882	closest = NULL;
	883	best_dist = -1;
	884	for (o = &options[0]; o->name; o++) {
	885	int match = 0;
	886
	887	if (o->type == FIO_OPT_DEPRECATED)
	888	continue;
	889	if (!exec_profile && o->prof_name)
	890	continue;
	891
	892	if (name) {
	893	if (!strcmp(name, o->name) \|\|
	894	(o->alias && !strcmp(name, o->alias)))
	895	match = 1;
	896	else {
	897	unsigned int dist;
	898
	899	dist = string_distance(name, o->name);
	900	if (dist < best_dist) {
	901	best_dist = dist;
	902	closest = o;
	903	}
	904	}
	905	}
	906
	907	if (show_all \|\| match) {
	908	found = 1;
	909	if (match)
	910	printf("%20s: %s\n", o->name, o->help);
	911	if (show_all) {
	912	if (!o->parent)
	913	print_option(o);
	914	continue;
	915	}
	916	}
	917
	918	if (!match)
	919	continue;
	920
	921	show_option_help(o, stdout);
	922	}
	923
	924	if (found)
	925	return 0;
	926
	927	printf("No such command: %s", name);
	928
	929	/*
	930	* Only print an appropriately close option, one where the edit
	931	* distance isn't too big. Otherwise we get crazy matches.
	932	*/
	933	if (closest && best_dist < 3) {
	934	printf(" - showing closest match\n");
	935	printf("%20s: %s\n", closest->name, closest->help);
	936	show_option_help(closest, stdout);
	937	} else
	938	printf("\n");
	939
	940	return 1;
	941	}
	942
	943	/*
	944	* Handle parsing of default parameters.
	945	*/
	946	void fill_default_options(void data, struct fio_option options)
	947	{
	948	struct fio_option *o;
	949
	950	dprint(FD_PARSE, "filling default options\n");
	951
	952	for (o = &options[0]; o->name; o++)
	953	if (o->def)
	954	handle_option(o, o->def, data);
	955	}
	956
	957	void option_init(struct fio_option *o)
	958	{
	959	if (o->type == FIO_OPT_DEPRECATED)
	960	return;
	961	if (o->type == FIO_OPT_BOOL) {
	962	o->minval = 0;
	963	o->maxval = 1;
	964	}
	965	if (o->type == FIO_OPT_STR_SET && o->def) {
	966	fprintf(stderr, "Option %s: string set option with"
	967	" default will always be true\n", o->name);
	968	}
	969	if (!o->cb && (!o->off1 && !o->roff1)) {
	970	fprintf(stderr, "Option %s: neither cb nor offset given\n",
	971	o->name);
	972	}
	973	if (o->type == FIO_OPT_STR \|\| o->type == FIO_OPT_STR_STORE \|\|
	974	o->type == FIO_OPT_STR_MULTI)
	975	return;
	976	if (o->cb && ((o->off1 \|\| o->off2 \|\| o->off3 \|\| o->off4) \|\|
	977	(o->roff1 \|\| o->roff2 \|\| o->roff3 \|\| o->roff4))) {
	978	fprintf(stderr, "Option %s: both cb and offset given\n",
	979	o->name);
	980	}
	981	}
	982
	983	/*
	984	* Sanitize the options structure. For now it just sets min/max for bool
	985	* values and whether both callback and offsets are given.
	986	*/
	987	void options_init(struct fio_option *options)
	988	{
	989	struct fio_option *o;
	990
	991	dprint(FD_PARSE, "init options\n");
	992
	993	for (o = &options[0]; o->name; o++)
	994	option_init(o);
	995	}