| 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 | default: |
| 44 | return 1; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | /* |
| 49 | * convert string into decimal value, noting any size suffix |
| 50 | */ |
| 51 | static int str_to_decimal(const char *str, unsigned long long *val, int kilo) |
| 52 | { |
| 53 | int len; |
| 54 | |
| 55 | len = strlen(str); |
| 56 | if (!len) |
| 57 | return 1; |
| 58 | |
| 59 | *val = strtoul(str, NULL, 10); |
| 60 | if (*val == ULONG_MAX && errno == ERANGE) |
| 61 | return 1; |
| 62 | |
| 63 | if (kilo) |
| 64 | *val *= get_mult_bytes(str[len - 1]); |
| 65 | else |
| 66 | *val *= get_mult_time(str[len - 1]); |
| 67 | |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | static int check_str_bytes(const char *p, unsigned long long *val) |
| 72 | { |
| 73 | return str_to_decimal(p, val, 1); |
| 74 | } |
| 75 | |
| 76 | static int check_str_time(const char *p, unsigned long long *val) |
| 77 | { |
| 78 | return str_to_decimal(p, val, 0); |
| 79 | } |
| 80 | |
| 81 | void strip_blank_front(char **p) |
| 82 | { |
| 83 | char *s = *p; |
| 84 | |
| 85 | while (isspace(*s)) |
| 86 | s++; |
| 87 | } |
| 88 | |
| 89 | void strip_blank_end(char *p) |
| 90 | { |
| 91 | char *s = p + strlen(p) - 1; |
| 92 | |
| 93 | while (isspace(*s) || iscntrl(*s)) |
| 94 | s--; |
| 95 | |
| 96 | *(s + 1) = '\0'; |
| 97 | } |
| 98 | |
| 99 | static int check_range_bytes(const char *str, unsigned long *val) |
| 100 | { |
| 101 | char suffix; |
| 102 | |
| 103 | if (!strlen(str)) |
| 104 | return 1; |
| 105 | |
| 106 | if (sscanf(str, "%lu%c", val, &suffix) == 2) { |
| 107 | *val *= get_mult_bytes(suffix); |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | if (sscanf(str, "%lu", val) == 1) |
| 112 | return 0; |
| 113 | |
| 114 | return 1; |
| 115 | } |
| 116 | |
| 117 | static int check_int(const char *p, unsigned int *val) |
| 118 | { |
| 119 | if (!strlen(p)) |
| 120 | return 1; |
| 121 | if (sscanf(p, "%u", val) == 1) |
| 122 | return 0; |
| 123 | |
| 124 | return 1; |
| 125 | } |
| 126 | |
| 127 | static struct fio_option *find_option(struct fio_option *options, |
| 128 | const char *opt) |
| 129 | { |
| 130 | struct fio_option *o = &options[0]; |
| 131 | |
| 132 | while (o->name) { |
| 133 | if (!strcmp(o->name, opt)) |
| 134 | return o; |
| 135 | |
| 136 | o++; |
| 137 | } |
| 138 | |
| 139 | return NULL; |
| 140 | } |
| 141 | |
| 142 | #define val_store(ptr, val, off, data) \ |
| 143 | do { \ |
| 144 | ptr = td_var((data), (off)); \ |
| 145 | *ptr = (val); \ |
| 146 | } while (0) |
| 147 | |
| 148 | static int __handle_option(struct fio_option *o, const char *ptr, void *data, |
| 149 | int first, int more) |
| 150 | { |
| 151 | unsigned int il, *ilp; |
| 152 | unsigned long long ull, *ullp; |
| 153 | unsigned long ul1, ul2; |
| 154 | char **cp; |
| 155 | int ret = 0, is_time = 0; |
| 156 | |
| 157 | if (!ptr && o->type != FIO_OPT_STR_SET) { |
| 158 | fprintf(stderr, "Option %s requires an argument\n", o->name); |
| 159 | return 1; |
| 160 | } |
| 161 | |
| 162 | switch (o->type) { |
| 163 | case FIO_OPT_STR: { |
| 164 | fio_opt_str_fn *fn = o->cb; |
| 165 | |
| 166 | ret = fn(data, ptr); |
| 167 | break; |
| 168 | } |
| 169 | case FIO_OPT_STR_VAL_TIME: |
| 170 | is_time = 1; |
| 171 | case FIO_OPT_STR_VAL: |
| 172 | case FIO_OPT_STR_VAL_INT: { |
| 173 | fio_opt_str_val_fn *fn = o->cb; |
| 174 | |
| 175 | if (is_time) |
| 176 | ret = check_str_time(ptr, &ull); |
| 177 | else |
| 178 | ret = check_str_bytes(ptr, &ull); |
| 179 | |
| 180 | if (ret) |
| 181 | break; |
| 182 | |
| 183 | if (o->max_val && ull > o->max_val) |
| 184 | ull = o->max_val; |
| 185 | |
| 186 | if (fn) |
| 187 | ret = fn(data, &ull); |
| 188 | else { |
| 189 | if (o->type == FIO_OPT_STR_VAL_INT) { |
| 190 | if (first) |
| 191 | val_store(ilp, ull, o->off1, data); |
| 192 | if (!more && o->off2) |
| 193 | val_store(ilp, ull, o->off2, data); |
| 194 | } else { |
| 195 | if (first) |
| 196 | val_store(ullp, ull, o->off1, data); |
| 197 | if (!more && o->off2) |
| 198 | val_store(ullp, ull, o->off2, data); |
| 199 | } |
| 200 | } |
| 201 | break; |
| 202 | } |
| 203 | case FIO_OPT_STR_STORE: |
| 204 | cp = td_var(data, o->off1); |
| 205 | *cp = strdup(ptr); |
| 206 | break; |
| 207 | case FIO_OPT_RANGE: { |
| 208 | char tmp[128]; |
| 209 | char *p1, *p2; |
| 210 | |
| 211 | strncpy(tmp, ptr, sizeof(tmp) - 1); |
| 212 | |
| 213 | p1 = strchr(tmp, '-'); |
| 214 | if (!p1) { |
| 215 | ret = 1; |
| 216 | break; |
| 217 | } |
| 218 | |
| 219 | p2 = p1 + 1; |
| 220 | *p1 = '\0'; |
| 221 | p1 = tmp; |
| 222 | |
| 223 | ret = 1; |
| 224 | if (!check_range_bytes(p1, &ul1) && !check_range_bytes(p2, &ul2)) { |
| 225 | ret = 0; |
| 226 | if (ul1 > ul2) { |
| 227 | unsigned long foo = ul1; |
| 228 | |
| 229 | ul1 = ul2; |
| 230 | ul2 = foo; |
| 231 | } |
| 232 | |
| 233 | if (first) { |
| 234 | val_store(ilp, ul1, o->off1, data); |
| 235 | val_store(ilp, ul2, o->off2, data); |
| 236 | } |
| 237 | if (!more && o->off3 && o->off4) { |
| 238 | val_store(ilp, ul1, o->off3, data); |
| 239 | val_store(ilp, ul2, o->off4, data); |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | break; |
| 244 | } |
| 245 | case FIO_OPT_INT: { |
| 246 | fio_opt_int_fn *fn = o->cb; |
| 247 | |
| 248 | ret = check_int(ptr, &il); |
| 249 | if (ret) |
| 250 | break; |
| 251 | |
| 252 | if (o->max_val && il > o->max_val) |
| 253 | il = o->max_val; |
| 254 | |
| 255 | if (fn) |
| 256 | ret = fn(data, &il); |
| 257 | else { |
| 258 | if (first) |
| 259 | val_store(ilp, il, o->off1, data); |
| 260 | if (!more && o->off2) |
| 261 | val_store(ilp, il, o->off2, data); |
| 262 | } |
| 263 | break; |
| 264 | } |
| 265 | case FIO_OPT_STR_SET: { |
| 266 | fio_opt_str_set_fn *fn = o->cb; |
| 267 | |
| 268 | if (fn) |
| 269 | ret = fn(data); |
| 270 | else { |
| 271 | if (first) |
| 272 | val_store(ilp, 1, o->off1, data); |
| 273 | if (!more && o->off2) |
| 274 | val_store(ilp, 1, o->off2, data); |
| 275 | } |
| 276 | break; |
| 277 | } |
| 278 | default: |
| 279 | fprintf(stderr, "Bad option type %u\n", o->type); |
| 280 | ret = 1; |
| 281 | } |
| 282 | |
| 283 | return ret; |
| 284 | } |
| 285 | |
| 286 | static int handle_option(struct fio_option *o, const char *ptr, void *data) |
| 287 | { |
| 288 | const char *ptr2 = NULL; |
| 289 | int r1, r2; |
| 290 | |
| 291 | /* |
| 292 | * See if we have a second set of parameters, hidden after a comma. |
| 293 | * Do this before parsing the first round, to check if we should |
| 294 | * copy set 1 options to set 2. |
| 295 | */ |
| 296 | if (ptr) |
| 297 | ptr2 = strchr(ptr, ','); |
| 298 | |
| 299 | /* |
| 300 | * Don't return early if parsing the first option fails - if |
| 301 | * we are doing multiple arguments, we can allow the first one |
| 302 | * being empty. |
| 303 | */ |
| 304 | r1 = __handle_option(o, ptr, data, 1, !!ptr2); |
| 305 | |
| 306 | if (!ptr2) |
| 307 | return r1; |
| 308 | |
| 309 | ptr2++; |
| 310 | r2 = __handle_option(o, ptr2, data, 0, 0); |
| 311 | |
| 312 | return r1 && r2; |
| 313 | } |
| 314 | |
| 315 | int parse_cmd_option(const char *opt, const char *val, |
| 316 | struct fio_option *options, void *data) |
| 317 | { |
| 318 | struct fio_option *o; |
| 319 | |
| 320 | o = find_option(options, opt); |
| 321 | if (!o) { |
| 322 | fprintf(stderr, "Bad option %s\n", opt); |
| 323 | return 1; |
| 324 | } |
| 325 | |
| 326 | if (!handle_option(o, val, data)) |
| 327 | return 0; |
| 328 | |
| 329 | fprintf(stderr, "fio: failed parsing %s=%s\n", opt, val); |
| 330 | return 1; |
| 331 | } |
| 332 | |
| 333 | int parse_option(const char *opt, struct fio_option *options, void *data) |
| 334 | { |
| 335 | struct fio_option *o; |
| 336 | char *pre, *post; |
| 337 | char tmp[64]; |
| 338 | |
| 339 | strncpy(tmp, opt, sizeof(tmp) - 1); |
| 340 | |
| 341 | pre = strchr(tmp, '='); |
| 342 | if (pre) { |
| 343 | post = pre; |
| 344 | *pre = '\0'; |
| 345 | pre = tmp; |
| 346 | post++; |
| 347 | o = find_option(options, pre); |
| 348 | } else { |
| 349 | o = find_option(options, tmp); |
| 350 | post = NULL; |
| 351 | } |
| 352 | |
| 353 | if (!o) { |
| 354 | fprintf(stderr, "Bad option %s\n", tmp); |
| 355 | return 1; |
| 356 | } |
| 357 | |
| 358 | if (!handle_option(o, post, data)) |
| 359 | return 0; |
| 360 | |
| 361 | fprintf(stderr, "fio: failed parsing %s\n", opt); |
| 362 | return 1; |
| 363 | } |
| 364 | |
| 365 | int show_cmd_help(struct fio_option *options, const char *name) |
| 366 | { |
| 367 | int show_all = !strcmp(name, "all"); |
| 368 | struct fio_option *o = &options[0]; |
| 369 | const char *typehelp[] = { |
| 370 | "string (opt=bla)", |
| 371 | "string with possible k/m/g postfix (opt=4k)", |
| 372 | "string with range and postfix (opt=1k-4k)", |
| 373 | "string with time postfix (opt=10s)", |
| 374 | "string (opt=bla)", |
| 375 | "string with dual range (opt=1k-4k,4k-8k)", |
| 376 | "integer value (opt=100)", |
| 377 | "no argument (opt)", |
| 378 | }; |
| 379 | |
| 380 | while (o->name) { |
| 381 | int match = !strcmp(name, o->name); |
| 382 | |
| 383 | if (show_all || match) { |
| 384 | printf("%s: %s\n", o->name, o->help); |
| 385 | if (match) |
| 386 | printf("type: %s\n", typehelp[o->type]); |
| 387 | } |
| 388 | |
| 389 | o++; |
| 390 | } |
| 391 | |
| 392 | |
| 393 | return 0; |
| 394 | } |