X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=parse.c;h=afbde61ef6f7c281ea5d1fb10ba0661f4ad30b4d;hp=f5a35fbce7e9e086da5e4cdb2e6cf35a1ba69d66;hb=7e356b2dee2e86f3684424fc6e903f1ef9f00ef4;hpb=a3073f4a296bba2cbd026603fe284341c370bfb0

diff --git a/parse.c b/parse.c
index f5a35fbc..afbde61e 100644
--- a/parse.c
+++ b/parse.c
@@ -9,6 +9,7 @@
 #include <errno.h>
 #include <limits.h>
 #include <stdlib.h>
+#include <math.h>
 
 #include "parse.h"
 #include "debug.h"
@@ -43,15 +44,26 @@ static void posval_sort(struct fio_option *o, struct value_pair *vpmap)
 	qsort(vpmap, entries, sizeof(struct value_pair), vp_cmp);
 }
 
-static void show_option_range(struct fio_option *o, FILE *out)
+static void show_option_range(struct fio_option *o,
+				int (*logger)(const char *format, ...))
 {
-	if (!o->minval && !o->maxval)
-		return;
+	if (o->type == FIO_OPT_FLOAT_LIST){
+		if (isnan(o->minfp) && isnan(o->maxfp))
+			return;
+
+		logger("%20s: min=%f", "range", o->minfp);
+		if (!isnan(o->maxfp))
+			logger(", max=%f", o->maxfp);
+		logger("\n");
+	} else {
+		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");
+		logger("%20s: min=%d", "range", o->minval);
+		if (o->maxval)
+			logger(", max=%d", o->maxval);
+		logger("\n");
+	}
 }
 
 static void show_option_values(struct fio_option *o)
@@ -64,39 +76,47 @@ static void show_option_values(struct fio_option *o)
 		if (!vp->ival)
 			continue;
 
-		printf("%20s: %-10s", i == 0 ? "valid values" : "", vp->ival);
+		log_info("%20s: %-10s", i == 0 ? "valid values" : "", vp->ival);
 		if (vp->help)
-			printf(" %s", vp->help);
-		printf("\n");
+			log_info(" %s", vp->help);
+		log_info("\n");
 	}
 
 	if (i)
-		printf("\n");
+		log_info("\n");
 }
 
-static void show_option_help(struct fio_option *o, FILE *out)
+static void show_option_help(struct fio_option *o, int is_err)
 {
 	const char *typehelp[] = {
 		"invalid",
 		"string (opt=bla)",
+		"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)",
+		"list of floating point values separated by ':' (opt=5.9:7.8)",
 		"no argument (opt)",
 		"deprecated",
 	};
+	int (*logger)(const char *format, ...);
+
+	if (is_err)
+		logger = log_err;
+	else
+		logger = log_info;
 
 	if (o->alias)
-		fprintf(out, "%20s: %s\n", "alias", o->alias);
+		logger("%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");
+	logger("%20s: %s\n", "type", typehelp[o->type]);
+	logger("%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);
+		logger("%20s: only for profile '%s'\n", "valid", o->prof_name);
+	show_option_range(o, logger);
 	show_option_values(o);
 }
 
@@ -117,35 +137,93 @@ static unsigned long get_mult_time(char c)
 	}
 }
 
-static unsigned long long get_mult_bytes(char c, void *data)
+static unsigned long long __get_mult_bytes(const char *p, void *data,
+					   int *percent)
 {
 	unsigned int kb_base = fio_get_kb_base(data);
 	unsigned long long ret = 1;
+	unsigned int i, pow = 0, mult = kb_base;
+	char *c;
 
-	switch (c) {
-	default:
-		break;
-	case 'p':
-	case 'P':
-		ret *= (unsigned long long) kb_base;
-	case 't':
-	case 'T':
-		ret *= (unsigned long long) kb_base;
-	case 'g':
-	case 'G':
-		ret *= (unsigned long long) kb_base;
-	case 'm':
-	case 'M':
-		ret *= (unsigned long long) kb_base;
-	case 'k':
-	case 'K':
-		ret *= (unsigned long long) kb_base;
-		break;
+	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;
+	else if (!strcmp("%", c)) {
+		*percent = 1;
+		return ret;
 	}
 
+	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,
+					 int *percent)
+{
+	const char *p = str;
+	int digit_seen = 0;
+
+	if (len < 2)
+		return __get_mult_bytes(str, data, percent);
+
+        /*
+         * Go forward until we hit a non-digit, or +/- sign
+         */
+	while ((p - str) <= len) {
+		if (!isdigit((int) *p) &&
+		    (((*p != '+') && (*p != '-')) || digit_seen))
+			break;
+		digit_seen |= isdigit((int) *p);
+		p++;
+	}
+
+	if (!isalpha((int) *p) && (*p != '%'))
+		p = NULL;
+
+	return __get_mult_bytes(p, data, percent);
+}
+
+/*
+ * Convert string into a floating number. Return 1 for success and 0 otherwise.
+ */
+int str_to_float(const char *str, double *val)
+{
+	return (1 == sscanf(str, "%lf", val));
+}
+
 /*
  * convert string into decimal value, noting any size suffix
  */
@@ -167,17 +245,14 @@ int str_to_decimal(const char *str, long long *val, int kilo, void *data)
 		return 1;
 
 	if (kilo) {
-		const char *p;
-		/*
-		 * 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;
-		if ((*p == 'b' || *p == 'B') && isalpha(*(p - 1)))
-			--p;
+		unsigned long long mult;
+		int perc = 0;
 
-		*val *= get_mult_bytes(*p, data);
+		mult = get_mult_bytes(str, len, data, &perc);
+		if (perc)
+			*val = -1ULL - *val;
+		else
+			*val *= mult;
 	} else
 		*val *= get_mult_time(str[len - 1]);
 
@@ -198,7 +273,7 @@ void strip_blank_front(char **p)
 {
 	char *s = *p;
 
-	while (isspace(*s))
+	while (isspace((int) *s))
 		s++;
 
 	*p = s;
@@ -218,7 +293,7 @@ void strip_blank_end(char *p)
 		p = s;
 
 	s = p + strlen(p);
-	while ((isspace(*s) || iscntrl(*s)) && (s > start))
+	while ((isspace((int) *s) || iscntrl((int) *s)) && (s > start))
 		s--;
 
 	*(s + 1) = '\0';
@@ -226,19 +301,13 @@ void strip_blank_end(char *p)
 
 static int check_range_bytes(const char *str, long *val, void *data)
 {
-	char suffix;
+	long long __val;
 
-	if (!strlen(str))
-		return 1;
-
-	if (sscanf(str, "%lu%c", val, &suffix) == 2) {
-		*val *= get_mult_bytes(suffix, data);
+	if (!str_to_decimal(str, &__val, 1, data)) {
+		*val = __val;
 		return 0;
 	}
 
-	if (sscanf(str, "%lu", val) == 1)
-		return 0;
-
 	return 1;
 }
 
@@ -257,79 +326,78 @@ static int check_int(const char *p, int *val)
 	return 1;
 }
 
-static inline int o_match(struct fio_option *o, const char *opt)
+static int opt_len(const char *str)
 {
-	if (!strcmp(o->name, opt))
-		return 1;
-	else if (o->alias && !strcmp(o->alias, opt))
-		return 1;
-
-	return 0;
-}
+	char *postfix;
 
-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 (o_match(o, opt))
-			return o;
+	postfix = strchr(str, ':');
+	if (!postfix)
+		return strlen(str);
 
-	return NULL;
+	return (int)(postfix - str);
 }
 
-#define val_store(ptr, val, off, data)			\
+#define val_store(ptr, val, off, or, data)		\
 	do {						\
 		ptr = td_var((data), (off));		\
-		*ptr = (val);				\
+		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 first, int more, int curr)
 {
 	int il, *ilp;
+	double* flp;
 	long long ull, *ullp;
 	long ul1, ul2;
+	double uf;
 	char **cp;
 	int ret = 0, is_time = 0;
+	const struct value_pair *vp;
+	struct value_pair posval[PARSE_MAX_VP];
+	int i, all_skipped = 1;
 
 	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);
+		log_err("Option %s requires an argument\n", o->name);
 		return 1;
 	}
 
 	switch (o->type) {
-	case FIO_OPT_STR: {
+	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;
 
 		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;
-			ret = 1;
-			if (!strncmp(vp->ival, ptr, strlen(vp->ival))) {
+			all_skipped = 0;
+			if (!strncmp(vp->ival, ptr, opt_len(ptr))) {
 				ret = 0;
-				if (o->roff1)
-					*(unsigned int *) o->roff1 = vp->oval;
-				else {
+				if (o->roff1) {
+					if (vp->or)
+						*(unsigned int *) o->roff1 |= vp->oval;
+					else
+						*(unsigned int *) o->roff1 = vp->oval;
+				} else {
 					if (!o->off1)
-						break;
-					val_store(ilp, vp->oval, o->off1, data);
+						continue;
+					val_store(ilp, vp->oval, o->off1, vp->or, data);
 				}
-				break;
+				continue;
 			}
 		}
 
-		if (ret)
+		if (ret && !all_skipped)
 			show_option_values(o);
 		else if (fn)
 			ret = fn(data, ptr);
@@ -350,12 +418,12 @@ static int __handle_option(struct fio_option *o, const char *ptr, void *data,
 			break;
 
 		if (o->maxval && ull > o->maxval) {
-			fprintf(stderr, "max value out of range: %lld"
+			log_err("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"
+			log_err("min value out of range: %lld"
 					" (%d min)\n", ull, o->minval);
 			return 1;
 		}
@@ -366,49 +434,108 @@ static int __handle_option(struct fio_option *o, const char *ptr, void *data,
 			if (o->type == FIO_OPT_INT) {
 				if (first) {
 					if (o->roff1)
-						*(unsigned long long *) o->roff1 = ull;
+						*(unsigned int *) o->roff1 = ull;
 					else
-						val_store(ilp, ull, o->off1, data);
+						val_store(ilp, ull, o->off1, 0, data);
 				}
 				if (!more) {
 					if (o->roff2)
-						*(unsigned long long *) o->roff2 = ull;
+						*(unsigned int *) o->roff2 = ull;
 					else if (o->off2)
-						val_store(ilp, ull, o->off2, data);
+						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, data);
+						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, data);
+						val_store(ullp, ull, o->off2, 0, data);
 				}
 			}
 		}
 		break;
 	}
+	case FIO_OPT_FLOAT_LIST: {
+
+		if (first) {
+			ul2 = 1;
+			ilp = td_var(data, o->off2);
+			*ilp = ul2;
+		}
+		if (curr >= o->maxlen) {
+			log_err("the list exceeding max length %d\n",
+					o->maxlen);
+			return 1;
+		}
+		if(!str_to_float(ptr, &uf)){
+			log_err("not a floating point value: %s\n", ptr);
+			return 1;
+		}
+		if (!isnan(o->maxfp) && uf > o->maxfp) {
+			log_err("value out of range: %f"
+				" (range max: %f)\n", uf, o->maxfp);
+			return 1;
+		}
+		if (!isnan(o->minfp) && uf < o->minfp) {
+			log_err("value out of range: %f"
+				" (range min: %f)\n", uf, o->minfp);
+			return 1;
+		}
+
+		flp = td_var(data, o->off1);
+		flp[curr] = uf;
+
+		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);
+		posval_sort(o, posval);
 
-		*cp = strdup(ptr);
-		if (fn) {
-			ret = fn(data, ptr);
-			if (ret) {
-				free(*cp);
-				*cp = NULL;
+		if (!o->posval[0].ival) {
+			vp = NULL;
+			goto match;
+		}
+
+		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))) {
+				char *rest;
+
+				ret = 0;
+				if (vp->cb)
+					fn = vp->cb;
+match:
+				if (o->roff1)
+					cp = (char **) o->roff1;
+				else
+					cp = td_var(data, o->off1);
+				*cp = strdup(ptr);
+				rest = strstr(*cp, ":");
+				if (rest) {
+					*rest = '\0';
+					ptr = rest + 1;
+				} else if (vp && vp->cb)
+					ptr = NULL;
+				break;
 			}
 		}
+
+		if (ret && !all_skipped)
+			show_option_values(o);
+		else if (fn && ptr)
+			ret = fn(data, ptr);
+
 		break;
 	}
 	case FIO_OPT_RANGE: {
@@ -417,6 +544,11 @@ static int __handle_option(struct fio_option *o, const char *ptr, void *data,
 
 		strncpy(tmp, ptr, sizeof(tmp) - 1);
 
+		/* Handle bsrange with separate read,write values: */
+		p1 = strchr(tmp, ',');
+		if (p1)
+			*p1 = '\0';
+
 		p1 = strchr(tmp, '-');
 		if (!p1) {
 			p1 = strchr(tmp, ':');
@@ -443,39 +575,46 @@ static int __handle_option(struct fio_option *o, const char *ptr, void *data,
 
 			if (first) {
 				if (o->roff1)
-					*(unsigned long *) o->roff1 = ul1;
+					*(unsigned int *) o->roff1 = ul1;
 				else
-					val_store(ilp, ul1, o->off1, data);
+					val_store(ilp, ul1, o->off1, 0, data);
 				if (o->roff2)
-					*(unsigned long *) o->roff2 = ul2;
+					*(unsigned int *) o->roff2 = ul2;
 				else
-					val_store(ilp, ul2, o->off2, data);
+					val_store(ilp, ul2, o->off2, 0, data);
 			}
 			if (o->roff3 && o->roff4) {
-				*(unsigned long *) o->roff3 = ul1;
-				*(unsigned long *) o->roff4 = ul2;
+				*(unsigned int *) o->roff3 = ul1;
+				*(unsigned int *) o->roff4 = ul2;
 			} else if (o->off3 && o->off4) {
-				val_store(ilp, ul1, o->off3, data);
-				val_store(ilp, ul2, o->off4, data);
+				val_store(ilp, ul1, o->off3, 0, data);
+				val_store(ilp, ul2, o->off4, 0, data);
 			}
 		}
 
 		break;
 	}
-	case FIO_OPT_BOOL: {
+	case FIO_OPT_BOOL:
+	case FIO_OPT_STR_SET: {
 		fio_opt_int_fn *fn = o->cb;
 
-		ret = check_int(ptr, &il);
+		if (ptr)
+			ret = check_int(ptr, &il);
+		else if (o->type == FIO_OPT_BOOL)
+			ret = 1;
+		else
+			il = 1;
+
 		if (ret)
 			break;
 
 		if (o->maxval && il > (int) o->maxval) {
-			fprintf(stderr, "max value out of range: %d (%d max)\n",
+			log_err("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",
+			log_err("min value out of range: %d (%d min)\n",
 								il, o->minval);
 			return 1;
 		}
@@ -490,43 +629,22 @@ static int __handle_option(struct fio_option *o, const char *ptr, void *data,
 				if (o->roff1)
 					*(unsigned int *)o->roff1 = il;
 				else
-					val_store(ilp, il, o->off1, data);
+					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, 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, data);
-			}
-			if (!more) {
-				if (o->roff2)
-					*(unsigned int *) o->roff2 = 1;
-				else if (o->off2)
-					val_store(ilp, 1, o->off2, data);
+					val_store(ilp, il, o->off2, 0, data);
 			}
 		}
 		break;
 	}
 	case FIO_OPT_DEPRECATED:
-		fprintf(stdout, "Option %s is deprecated\n", o->name);
+		log_info("Option %s is deprecated\n", o->name);
 		break;
 	default:
-		fprintf(stderr, "Bad option type %u\n", o->type);
+		log_err("Bad option type %u\n", o->type);
 		ret = 1;
 	}
 
@@ -536,9 +654,9 @@ static int __handle_option(struct fio_option *o, const char *ptr, void *data,
 	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);
+			log_err("Correct format for offending option\n");
+			log_err("%20s: %s\n", o->name, o->help);
+			show_option_help(o, 1);
 		}
 	}
 
@@ -547,51 +665,62 @@ static int __handle_option(struct fio_option *o, const char *ptr, void *data,
 
 static int handle_option(struct fio_option *o, const char *__ptr, void *data)
 {
-	char *ptr, *ptr2 = NULL;
-	int r1, r2;
+	char *o_ptr, *ptr, *ptr2;
+	int ret, done;
 
 	dprint(FD_PARSE, "handle_option=%s, ptr=%s\n", o->name, __ptr);
 
-	ptr = NULL;
+	o_ptr = ptr = NULL;
 	if (__ptr)
-		ptr = strdup(__ptr);
+		o_ptr = ptr = strdup(__ptr);
 
 	/*
-	 * 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
+	 * 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.
 	 */
-	if (ptr &&
-	    (o->type != FIO_OPT_STR_STORE) &&
-	    (o->type != FIO_OPT_STR)) {
-		ptr2 = strchr(ptr, ',');
-		if (ptr2 && *(ptr2 + 1) == '\0')
-			*ptr2 = '\0';
-		if (!ptr2)
+	done = 0;
+	ret = 1;
+	do {
+		int __ret;
+
+		ptr2 = NULL;
+		if (ptr &&
+		    (o->type != FIO_OPT_STR_STORE) &&
+		    (o->type != FIO_OPT_STR) &&
+		    (o->type != FIO_OPT_FLOAT_LIST)) {
+			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, '-');
+			}
+		} else if (ptr && o->type == FIO_OPT_FLOAT_LIST) {
 			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);
+		/*
+		 * 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, done);
+		if (ret)
+			ret = __ret;
 
-	if (!ptr2) {
-		if (ptr)
-			free(ptr);
-		return r1;
-	}
+		if (!ptr2)
+			break;
 
-	ptr2++;
-	r2 = __handle_option(o, ptr2, data, 0, 0);
+		ptr = ptr2 + 1;
+		done++;
+	} while (1);
 
-	if (ptr)
-		free(ptr);
-	return r1 && r2;
+	if (o_ptr)
+		free(o_ptr);
+	return ret;
 }
 
 static struct fio_option *get_option(const char *opt,
@@ -653,14 +782,14 @@ int parse_cmd_option(const char *opt, const char *val,
 
 	o = find_option(options, opt);
 	if (!o) {
-		fprintf(stderr, "Bad option <%s>\n", opt);
+		log_err("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);
+	log_err("fio: failed parsing %s=%s\n", opt, val);
 	return 1;
 }
 
@@ -680,8 +809,8 @@ static char *option_dup_subs(const char *opt)
 	ssize_t nchr = OPT_LEN_MAX;
 	size_t envlen;
 
-	if (strlen(in) + 1 > OPT_LEN_MAX) {
-		fprintf(stderr, "OPT_LEN_MAX (%d) is too small\n", OPT_LEN_MAX);
+	if (strlen(opt) + 1 > OPT_LEN_MAX) {
+		log_err("OPT_LEN_MAX (%d) is too small\n", OPT_LEN_MAX);
 		return NULL;
 	}
 
@@ -729,7 +858,7 @@ int parse_option(const char *opt, struct fio_option *options, void *data)
 
 	o = get_option(tmp, options, &post);
 	if (!o) {
-		fprintf(stderr, "Bad option <%s>\n", tmp);
+		log_err("Bad option <%s>\n", tmp);
 		free(tmp);
 		return 1;
 	}
@@ -739,7 +868,7 @@ int parse_option(const char *opt, struct fio_option *options, void *data)
 		return 0;
 	}
 
-	fprintf(stderr, "fio: failed parsing %s\n", opt);
+	log_err("fio: failed parsing %s\n", opt);
 	free(tmp);
 	return 1;
 }
@@ -813,7 +942,7 @@ static void __print_option(struct fio_option *o, struct fio_option *org,
 
 	sprintf(p, "%s", o->name);
 
-	printf("%-24s: %s\n", name, o->help);
+	log_info("%-24s: %s\n", name, o->help);
 }
 
 static void print_option(struct fio_option *o)
@@ -843,7 +972,7 @@ static void print_option(struct fio_option *o)
 int show_cmd_help(struct fio_option *options, const char *name)
 {
 	struct fio_option *o, *closest;
-	unsigned int best_dist;
+	unsigned int best_dist = -1U;
 	int found = 0;
 	int show_all = 0;
 
@@ -878,7 +1007,7 @@ int show_cmd_help(struct fio_option *options, const char *name)
 		if (show_all || match) {
 			found = 1;
 			if (match)
-				printf("%20s: %s\n", o->name, o->help);
+				log_info("%20s: %s\n", o->name, o->help);
 			if (show_all) {
 				if (!o->parent)
 					print_option(o);
@@ -889,19 +1018,24 @@ int show_cmd_help(struct fio_option *options, const char *name)
 		if (!match)
 			continue;
 
-		show_option_help(o, stdout);
+		show_option_help(o, 0);
 	}
 
 	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, stdout);
+	log_err("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) {
+		log_info(" - showing closest match\n");
+		log_info("%20s: %s\n", closest->name, closest->help);
+		show_option_help(closest, 0);
 	} else
-		printf("\n");
+		log_info("\n");
 
 	return 1;
 }
@@ -928,20 +1062,22 @@ void option_init(struct fio_option *o)
 		o->minval = 0;
 		o->maxval = 1;
 	}
+	if (o->type == FIO_OPT_FLOAT_LIST) {
+		o->minfp = NAN;
+		o->maxfp = NAN;
+	}
 	if (o->type == FIO_OPT_STR_SET && o->def) {
-		fprintf(stderr, "Option %s: string set option with"
+		log_err("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)
+	if (!o->cb && (!o->off1 && !o->roff1))
+		log_err("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);
+		log_err("Option %s: both cb and offset given\n", o->name);
 	}
 }
 
@@ -958,3 +1094,22 @@ void options_init(struct fio_option *options)
 	for (o = &options[0]; o->name; o++)
 		option_init(o);
 }
+
+void options_free(struct fio_option *options, void *data)
+{
+	struct fio_option *o;
+	char **ptr;
+
+	dprint(FD_PARSE, "free options\n");
+
+	for (o = &options[0]; o->name; o++) {
+		if (o->type != FIO_OPT_STR_STORE)
+			continue;
+
+		ptr = td_var(data, o->off1);
+		if (*ptr) {
+			free(*ptr);
+			*ptr = NULL;
+		}
+	}
+}