blob: 57865b112e7a9118a9a4e6fc3dd0a60a0d66a9a8 [file] [log] [blame]
/*
* 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 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)
{
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)
{
int i = 0;
do {
const struct value_pair *vp = &o->posval[i];
if (!vp->ival)
break;
printf("%20s: %-10s", i == 0 ? "valid values" : "", vp->ival);
if (vp->help)
printf(" %s", vp->help);
printf("\n");
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;
struct value_pair posval[PARSE_MAX_VP];
int i;
posval_sort(o, posval);
for (i = 0; i < PARSE_MAX_VP; i++) {
vp = &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, ':');
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)",
};
if (o->alias)
printf("%20s: %s\n", "alias", o->alias);
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) ||
(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) {
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->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)
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);
}
}