1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1998 Michael Smith 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * The unified bootloader passes us a pointer to a preserved copy of 31 * bootstrap/kernel environment variables. We convert them to a 32 * dynamic array of strings later when the VM subsystem is up. 33 * 34 * We make these available through the kenv(2) syscall for userland 35 * and through kern_getenv()/freeenv() kern_setenv() kern_unsetenv() testenv() for 36 * the kernel. 37 */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/param.h> 43 #include <sys/proc.h> 44 #include <sys/queue.h> 45 #include <sys/lock.h> 46 #include <sys/malloc.h> 47 #include <sys/mutex.h> 48 #include <sys/priv.h> 49 #include <sys/kernel.h> 50 #include <sys/systm.h> 51 #include <sys/sysent.h> 52 #include <sys/sysproto.h> 53 #include <sys/libkern.h> 54 #include <sys/kenv.h> 55 #include <sys/limits.h> 56 57 #include <security/mac/mac_framework.h> 58 59 static char *_getenv_dynamic_locked(const char *name, int *idx); 60 static char *_getenv_dynamic(const char *name, int *idx); 61 62 static MALLOC_DEFINE(M_KENV, "kenv", "kernel environment"); 63 64 #define KENV_SIZE 512 /* Maximum number of environment strings */ 65 66 /* pointer to the config-generated static environment */ 67 char *kern_envp; 68 69 /* pointer to the md-static environment */ 70 char *md_envp; 71 static int md_env_len; 72 static int md_env_pos; 73 74 static char *kernenv_next(char *); 75 76 /* dynamic environment variables */ 77 char **kenvp; 78 struct mtx kenv_lock; 79 80 /* 81 * No need to protect this with a mutex since SYSINITS are single threaded. 82 */ 83 bool dynamic_kenv; 84 85 #define KENV_CHECK if (!dynamic_kenv) \ 86 panic("%s: called before SI_SUB_KMEM", __func__) 87 88 int 89 sys_kenv(td, uap) 90 struct thread *td; 91 struct kenv_args /* { 92 int what; 93 const char *name; 94 char *value; 95 int len; 96 } */ *uap; 97 { 98 char *name, *value, *buffer = NULL; 99 size_t len, done, needed, buflen; 100 int error, i; 101 102 KASSERT(dynamic_kenv, ("kenv: dynamic_kenv = false")); 103 104 error = 0; 105 if (uap->what == KENV_DUMP) { 106 #ifdef MAC 107 error = mac_kenv_check_dump(td->td_ucred); 108 if (error) 109 return (error); 110 #endif 111 done = needed = 0; 112 buflen = uap->len; 113 if (buflen > KENV_SIZE * (KENV_MNAMELEN + KENV_MVALLEN + 2)) 114 buflen = KENV_SIZE * (KENV_MNAMELEN + 115 KENV_MVALLEN + 2); 116 if (uap->len > 0 && uap->value != NULL) 117 buffer = malloc(buflen, M_TEMP, M_WAITOK|M_ZERO); 118 mtx_lock(&kenv_lock); 119 for (i = 0; kenvp[i] != NULL; i++) { 120 len = strlen(kenvp[i]) + 1; 121 needed += len; 122 len = min(len, buflen - done); 123 /* 124 * If called with a NULL or insufficiently large 125 * buffer, just keep computing the required size. 126 */ 127 if (uap->value != NULL && buffer != NULL && len > 0) { 128 bcopy(kenvp[i], buffer + done, len); 129 done += len; 130 } 131 } 132 mtx_unlock(&kenv_lock); 133 if (buffer != NULL) { 134 error = copyout(buffer, uap->value, done); 135 free(buffer, M_TEMP); 136 } 137 td->td_retval[0] = ((done == needed) ? 0 : needed); 138 return (error); 139 } 140 141 switch (uap->what) { 142 case KENV_SET: 143 error = priv_check(td, PRIV_KENV_SET); 144 if (error) 145 return (error); 146 break; 147 148 case KENV_UNSET: 149 error = priv_check(td, PRIV_KENV_UNSET); 150 if (error) 151 return (error); 152 break; 153 } 154 155 name = malloc(KENV_MNAMELEN + 1, M_TEMP, M_WAITOK); 156 157 error = copyinstr(uap->name, name, KENV_MNAMELEN + 1, NULL); 158 if (error) 159 goto done; 160 161 switch (uap->what) { 162 case KENV_GET: 163 #ifdef MAC 164 error = mac_kenv_check_get(td->td_ucred, name); 165 if (error) 166 goto done; 167 #endif 168 value = kern_getenv(name); 169 if (value == NULL) { 170 error = ENOENT; 171 goto done; 172 } 173 len = strlen(value) + 1; 174 if (len > uap->len) 175 len = uap->len; 176 error = copyout(value, uap->value, len); 177 freeenv(value); 178 if (error) 179 goto done; 180 td->td_retval[0] = len; 181 break; 182 case KENV_SET: 183 len = uap->len; 184 if (len < 1) { 185 error = EINVAL; 186 goto done; 187 } 188 if (len > KENV_MVALLEN + 1) 189 len = KENV_MVALLEN + 1; 190 value = malloc(len, M_TEMP, M_WAITOK); 191 error = copyinstr(uap->value, value, len, NULL); 192 if (error) { 193 free(value, M_TEMP); 194 goto done; 195 } 196 #ifdef MAC 197 error = mac_kenv_check_set(td->td_ucred, name, value); 198 if (error == 0) 199 #endif 200 kern_setenv(name, value); 201 free(value, M_TEMP); 202 break; 203 case KENV_UNSET: 204 #ifdef MAC 205 error = mac_kenv_check_unset(td->td_ucred, name); 206 if (error) 207 goto done; 208 #endif 209 error = kern_unsetenv(name); 210 if (error) 211 error = ENOENT; 212 break; 213 default: 214 error = EINVAL; 215 break; 216 } 217 done: 218 free(name, M_TEMP); 219 return (error); 220 } 221 222 /* 223 * Populate the initial kernel environment. 224 * 225 * This is called very early in MD startup, either to provide a copy of the 226 * environment obtained from a boot loader, or to provide an empty buffer into 227 * which MD code can store an initial environment using kern_setenv() calls. 228 * 229 * kern_envp is set to the static_env generated by config(8). This implements 230 * the env keyword described in config(5). 231 * 232 * If len is non-zero, the caller is providing an empty buffer. The caller will 233 * subsequently use kern_setenv() to add up to len bytes of initial environment 234 * before the dynamic environment is available. 235 * 236 * If len is zero, the caller is providing a pre-loaded buffer containing 237 * environment strings. Additional strings cannot be added until the dynamic 238 * environment is available. The memory pointed to must remain stable at least 239 * until sysinit runs init_dynamic_kenv() and preferably until after SI_SUB_KMEM 240 * is finished so that subr_hints routines may continue to use it until the 241 * environments have been fully merged at the end of the pass. If no initial 242 * environment is available from the boot loader, passing a NULL pointer allows 243 * the static_env to be installed if it is configured. In this case, any call 244 * to kern_setenv() prior to the setup of the dynamic environment will result in 245 * a panic. 246 */ 247 void 248 init_static_kenv(char *buf, size_t len) 249 { 250 char *eval; 251 252 md_envp = buf; 253 md_env_len = len; 254 md_env_pos = 0; 255 256 /* 257 * static_env and static_hints may both be disabled, but in slightly 258 * different ways. For static_env, we just don't setup kern_envp and 259 * it's as if a static env wasn't even provided. For static_hints, 260 * we effectively zero out the buffer to stop the rest of the kernel 261 * from being able to use it. 262 * 263 * We're intentionally setting this up so that static_hints.disabled may 264 * be specified in either the MD env or the static env. This keeps us 265 * consistent in our new world view. 266 */ 267 eval = kern_getenv("static_env.disabled"); 268 if (eval == NULL || strcmp(eval, "1") != 0) 269 kern_envp = static_env; 270 eval = kern_getenv("static_hints.disabled"); 271 if (eval != NULL && strcmp(eval, "1") == 0) 272 *static_hints = '\0'; 273 } 274 275 static void 276 init_dynamic_kenv_from(char *init_env, int *curpos) 277 { 278 char *cp, *cpnext, *eqpos, *found; 279 size_t len; 280 int i; 281 282 if (init_env && *init_env != '\0') { 283 found = NULL; 284 i = *curpos; 285 for (cp = init_env; cp != NULL; cp = cpnext) { 286 cpnext = kernenv_next(cp); 287 len = strlen(cp) + 1; 288 if (len > KENV_MNAMELEN + 1 + KENV_MVALLEN + 1) { 289 printf( 290 "WARNING: too long kenv string, ignoring %s\n", 291 cp); 292 goto sanitize; 293 } 294 eqpos = strchr(cp, '='); 295 if (eqpos == NULL) { 296 printf( 297 "WARNING: malformed static env value, ignoring %s\n", 298 cp); 299 goto sanitize; 300 } 301 *eqpos = 0; 302 /* 303 * De-dupe the environment as we go. We don't add the 304 * duplicated assignments because config(8) will flip 305 * the order of the static environment around to make 306 * kernel processing match the order of specification 307 * in the kernel config. 308 */ 309 found = _getenv_dynamic_locked(cp, NULL); 310 *eqpos = '='; 311 if (found != NULL) 312 goto sanitize; 313 if (i > KENV_SIZE) { 314 printf( 315 "WARNING: too many kenv strings, ignoring %s\n", 316 cp); 317 goto sanitize; 318 } 319 320 kenvp[i] = malloc(len, M_KENV, M_WAITOK); 321 strcpy(kenvp[i++], cp); 322 sanitize: 323 explicit_bzero(cp, len - 1); 324 } 325 *curpos = i; 326 } 327 } 328 329 /* 330 * Setup the dynamic kernel environment. 331 */ 332 static void 333 init_dynamic_kenv(void *data __unused) 334 { 335 int dynamic_envpos; 336 337 kenvp = malloc((KENV_SIZE + 1) * sizeof(char *), M_KENV, 338 M_WAITOK | M_ZERO); 339 340 dynamic_envpos = 0; 341 init_dynamic_kenv_from(md_envp, &dynamic_envpos); 342 init_dynamic_kenv_from(kern_envp, &dynamic_envpos); 343 kenvp[dynamic_envpos] = NULL; 344 345 mtx_init(&kenv_lock, "kernel environment", NULL, MTX_DEF); 346 dynamic_kenv = true; 347 } 348 SYSINIT(kenv, SI_SUB_KMEM + 1, SI_ORDER_FIRST, init_dynamic_kenv, NULL); 349 350 void 351 freeenv(char *env) 352 { 353 354 if (dynamic_kenv && env != NULL) { 355 explicit_bzero(env, strlen(env)); 356 free(env, M_KENV); 357 } 358 } 359 360 /* 361 * Internal functions for string lookup. 362 */ 363 static char * 364 _getenv_dynamic_locked(const char *name, int *idx) 365 { 366 char *cp; 367 int len, i; 368 369 len = strlen(name); 370 for (cp = kenvp[0], i = 0; cp != NULL; cp = kenvp[++i]) { 371 if ((strncmp(cp, name, len) == 0) && 372 (cp[len] == '=')) { 373 if (idx != NULL) 374 *idx = i; 375 return (cp + len + 1); 376 } 377 } 378 return (NULL); 379 } 380 381 static char * 382 _getenv_dynamic(const char *name, int *idx) 383 { 384 385 mtx_assert(&kenv_lock, MA_OWNED); 386 return (_getenv_dynamic_locked(name, idx)); 387 } 388 389 static char * 390 _getenv_static_from(char *chkenv, const char *name) 391 { 392 char *cp, *ep; 393 int len; 394 395 for (cp = chkenv; cp != NULL; cp = kernenv_next(cp)) { 396 for (ep = cp; (*ep != '=') && (*ep != 0); ep++) 397 ; 398 if (*ep != '=') 399 continue; 400 len = ep - cp; 401 ep++; 402 if (!strncmp(name, cp, len) && name[len] == 0) 403 return (ep); 404 } 405 return (NULL); 406 } 407 408 static char * 409 _getenv_static(const char *name) 410 { 411 char *val; 412 413 val = _getenv_static_from(md_envp, name); 414 if (val != NULL) 415 return (val); 416 val = _getenv_static_from(kern_envp, name); 417 if (val != NULL) 418 return (val); 419 return (NULL); 420 } 421 422 /* 423 * Look up an environment variable by name. 424 * Return a pointer to the string if found. 425 * The pointer has to be freed with freeenv() 426 * after use. 427 */ 428 char * 429 kern_getenv(const char *name) 430 { 431 char buf[KENV_MNAMELEN + 1 + KENV_MVALLEN + 1]; 432 char *ret; 433 434 if (dynamic_kenv) { 435 if (getenv_string(name, buf, sizeof(buf))) { 436 ret = strdup(buf, M_KENV); 437 } else { 438 ret = NULL; 439 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, 440 "getenv"); 441 } 442 } else 443 ret = _getenv_static(name); 444 return (ret); 445 } 446 447 /* 448 * Test if an environment variable is defined. 449 */ 450 int 451 testenv(const char *name) 452 { 453 char *cp; 454 455 if (dynamic_kenv) { 456 mtx_lock(&kenv_lock); 457 cp = _getenv_dynamic(name, NULL); 458 mtx_unlock(&kenv_lock); 459 } else 460 cp = _getenv_static(name); 461 if (cp != NULL) 462 return (1); 463 return (0); 464 } 465 466 /* 467 * Set an environment variable in the MD-static environment. This cannot 468 * feasibly be done on config(8)-generated static environments as they don't 469 * generally include space for extra variables. 470 */ 471 static int 472 setenv_static(const char *name, const char *value) 473 { 474 int len; 475 476 if (md_env_pos >= md_env_len) 477 return (-1); 478 479 /* Check space for x=y and two nuls */ 480 len = strlen(name) + strlen(value); 481 if (len + 3 < md_env_len - md_env_pos) { 482 len = sprintf(&md_envp[md_env_pos], "%s=%s", name, value); 483 md_env_pos += len+1; 484 md_envp[md_env_pos] = '\0'; 485 return (0); 486 } else 487 return (-1); 488 489 } 490 491 /* 492 * Set an environment variable by name. 493 */ 494 int 495 kern_setenv(const char *name, const char *value) 496 { 497 char *buf, *cp, *oldenv; 498 int namelen, vallen, i; 499 500 if (!dynamic_kenv && md_env_len > 0) 501 return (setenv_static(name, value)); 502 503 KENV_CHECK; 504 505 namelen = strlen(name) + 1; 506 if (namelen > KENV_MNAMELEN + 1) 507 return (-1); 508 vallen = strlen(value) + 1; 509 if (vallen > KENV_MVALLEN + 1) 510 return (-1); 511 buf = malloc(namelen + vallen, M_KENV, M_WAITOK); 512 sprintf(buf, "%s=%s", name, value); 513 514 mtx_lock(&kenv_lock); 515 cp = _getenv_dynamic(name, &i); 516 if (cp != NULL) { 517 oldenv = kenvp[i]; 518 kenvp[i] = buf; 519 mtx_unlock(&kenv_lock); 520 free(oldenv, M_KENV); 521 } else { 522 /* We add the option if it wasn't found */ 523 for (i = 0; (cp = kenvp[i]) != NULL; i++) 524 ; 525 526 /* Bounds checking */ 527 if (i < 0 || i >= KENV_SIZE) { 528 free(buf, M_KENV); 529 mtx_unlock(&kenv_lock); 530 return (-1); 531 } 532 533 kenvp[i] = buf; 534 kenvp[i + 1] = NULL; 535 mtx_unlock(&kenv_lock); 536 } 537 return (0); 538 } 539 540 /* 541 * Unset an environment variable string. 542 */ 543 int 544 kern_unsetenv(const char *name) 545 { 546 char *cp, *oldenv; 547 int i, j; 548 549 KENV_CHECK; 550 551 mtx_lock(&kenv_lock); 552 cp = _getenv_dynamic(name, &i); 553 if (cp != NULL) { 554 oldenv = kenvp[i]; 555 for (j = i + 1; kenvp[j] != NULL; j++) 556 kenvp[i++] = kenvp[j]; 557 kenvp[i] = NULL; 558 mtx_unlock(&kenv_lock); 559 explicit_bzero(oldenv, strlen(oldenv)); 560 free(oldenv, M_KENV); 561 return (0); 562 } 563 mtx_unlock(&kenv_lock); 564 return (-1); 565 } 566 567 /* 568 * Return a string value from an environment variable. 569 */ 570 int 571 getenv_string(const char *name, char *data, int size) 572 { 573 char *cp; 574 575 if (dynamic_kenv) { 576 mtx_lock(&kenv_lock); 577 cp = _getenv_dynamic(name, NULL); 578 if (cp != NULL) 579 strlcpy(data, cp, size); 580 mtx_unlock(&kenv_lock); 581 } else { 582 cp = _getenv_static(name); 583 if (cp != NULL) 584 strlcpy(data, cp, size); 585 } 586 return (cp != NULL); 587 } 588 589 /* 590 * Return an array of integers at the given type size and signedness. 591 */ 592 int 593 getenv_array(const char *name, void *pdata, int size, int *psize, 594 int type_size, bool allow_signed) 595 { 596 char buf[KENV_MNAMELEN + 1 + KENV_MVALLEN + 1]; 597 uint8_t shift; 598 int64_t value; 599 int64_t old; 600 char *end; 601 char *ptr; 602 int n; 603 604 if (getenv_string(name, buf, sizeof(buf)) == 0) 605 return (0); 606 607 /* get maximum number of elements */ 608 size /= type_size; 609 610 n = 0; 611 612 for (ptr = buf; *ptr != 0; ) { 613 614 value = strtoq(ptr, &end, 0); 615 616 /* check if signed numbers are allowed */ 617 if (value < 0 && !allow_signed) 618 goto error; 619 620 /* check for invalid value */ 621 if (ptr == end) 622 goto error; 623 624 /* check for valid suffix */ 625 switch (*end) { 626 case 't': 627 case 'T': 628 shift = 40; 629 end++; 630 break; 631 case 'g': 632 case 'G': 633 shift = 30; 634 end++; 635 break; 636 case 'm': 637 case 'M': 638 shift = 20; 639 end++; 640 break; 641 case 'k': 642 case 'K': 643 shift = 10; 644 end++; 645 break; 646 case ' ': 647 case '\t': 648 case ',': 649 case 0: 650 shift = 0; 651 break; 652 default: 653 /* garbage after numeric value */ 654 goto error; 655 } 656 657 /* skip till next value, if any */ 658 while (*end == '\t' || *end == ',' || *end == ' ') 659 end++; 660 661 /* update pointer */ 662 ptr = end; 663 664 /* apply shift */ 665 old = value; 666 value <<= shift; 667 668 /* overflow check */ 669 if ((value >> shift) != old) 670 goto error; 671 672 /* check for buffer overflow */ 673 if (n >= size) 674 goto error; 675 676 /* store value according to type size */ 677 switch (type_size) { 678 case 1: 679 if (allow_signed) { 680 if (value < SCHAR_MIN || value > SCHAR_MAX) 681 goto error; 682 } else { 683 if (value < 0 || value > UCHAR_MAX) 684 goto error; 685 } 686 ((uint8_t *)pdata)[n] = (uint8_t)value; 687 break; 688 case 2: 689 if (allow_signed) { 690 if (value < SHRT_MIN || value > SHRT_MAX) 691 goto error; 692 } else { 693 if (value < 0 || value > USHRT_MAX) 694 goto error; 695 } 696 ((uint16_t *)pdata)[n] = (uint16_t)value; 697 break; 698 case 4: 699 if (allow_signed) { 700 if (value < INT_MIN || value > INT_MAX) 701 goto error; 702 } else { 703 if (value > UINT_MAX) 704 goto error; 705 } 706 ((uint32_t *)pdata)[n] = (uint32_t)value; 707 break; 708 case 8: 709 ((uint64_t *)pdata)[n] = (uint64_t)value; 710 break; 711 default: 712 goto error; 713 } 714 n++; 715 } 716 *psize = n * type_size; 717 718 if (n != 0) 719 return (1); /* success */ 720 error: 721 return (0); /* failure */ 722 } 723 724 /* 725 * Return an integer value from an environment variable. 726 */ 727 int 728 getenv_int(const char *name, int *data) 729 { 730 quad_t tmp; 731 int rval; 732 733 rval = getenv_quad(name, &tmp); 734 if (rval) 735 *data = (int) tmp; 736 return (rval); 737 } 738 739 /* 740 * Return an unsigned integer value from an environment variable. 741 */ 742 int 743 getenv_uint(const char *name, unsigned int *data) 744 { 745 quad_t tmp; 746 int rval; 747 748 rval = getenv_quad(name, &tmp); 749 if (rval) 750 *data = (unsigned int) tmp; 751 return (rval); 752 } 753 754 /* 755 * Return an int64_t value from an environment variable. 756 */ 757 int 758 getenv_int64(const char *name, int64_t *data) 759 { 760 quad_t tmp; 761 int64_t rval; 762 763 rval = getenv_quad(name, &tmp); 764 if (rval) 765 *data = (int64_t) tmp; 766 return (rval); 767 } 768 769 /* 770 * Return an uint64_t value from an environment variable. 771 */ 772 int 773 getenv_uint64(const char *name, uint64_t *data) 774 { 775 quad_t tmp; 776 uint64_t rval; 777 778 rval = getenv_quad(name, &tmp); 779 if (rval) 780 *data = (uint64_t) tmp; 781 return (rval); 782 } 783 784 /* 785 * Return a long value from an environment variable. 786 */ 787 int 788 getenv_long(const char *name, long *data) 789 { 790 quad_t tmp; 791 int rval; 792 793 rval = getenv_quad(name, &tmp); 794 if (rval) 795 *data = (long) tmp; 796 return (rval); 797 } 798 799 /* 800 * Return an unsigned long value from an environment variable. 801 */ 802 int 803 getenv_ulong(const char *name, unsigned long *data) 804 { 805 quad_t tmp; 806 int rval; 807 808 rval = getenv_quad(name, &tmp); 809 if (rval) 810 *data = (unsigned long) tmp; 811 return (rval); 812 } 813 814 /* 815 * Return a quad_t value from an environment variable. 816 */ 817 int 818 getenv_quad(const char *name, quad_t *data) 819 { 820 char value[KENV_MNAMELEN + 1 + KENV_MVALLEN + 1]; 821 char *vtp; 822 quad_t iv; 823 824 if (!getenv_string(name, value, sizeof(value))) 825 return (0); 826 iv = strtoq(value, &vtp, 0); 827 if (vtp == value || (vtp[0] != '\0' && vtp[1] != '\0')) 828 return (0); 829 switch (vtp[0]) { 830 case 't': case 'T': 831 iv *= 1024; 832 case 'g': case 'G': 833 iv *= 1024; 834 case 'm': case 'M': 835 iv *= 1024; 836 case 'k': case 'K': 837 iv *= 1024; 838 case '\0': 839 break; 840 default: 841 return (0); 842 } 843 *data = iv; 844 return (1); 845 } 846 847 /* 848 * Find the next entry after the one which (cp) falls within, return a 849 * pointer to its start or NULL if there are no more. 850 */ 851 static char * 852 kernenv_next(char *cp) 853 { 854 855 if (cp != NULL) { 856 while (*cp != 0) 857 cp++; 858 cp++; 859 if (*cp == 0) 860 cp = NULL; 861 } 862 return (cp); 863 } 864 865 void 866 tunable_int_init(void *data) 867 { 868 struct tunable_int *d = (struct tunable_int *)data; 869 870 TUNABLE_INT_FETCH(d->path, d->var); 871 } 872 873 void 874 tunable_long_init(void *data) 875 { 876 struct tunable_long *d = (struct tunable_long *)data; 877 878 TUNABLE_LONG_FETCH(d->path, d->var); 879 } 880 881 void 882 tunable_ulong_init(void *data) 883 { 884 struct tunable_ulong *d = (struct tunable_ulong *)data; 885 886 TUNABLE_ULONG_FETCH(d->path, d->var); 887 } 888 889 void 890 tunable_int64_init(void *data) 891 { 892 struct tunable_int64 *d = (struct tunable_int64 *)data; 893 894 TUNABLE_INT64_FETCH(d->path, d->var); 895 } 896 897 void 898 tunable_uint64_init(void *data) 899 { 900 struct tunable_uint64 *d = (struct tunable_uint64 *)data; 901 902 TUNABLE_UINT64_FETCH(d->path, d->var); 903 } 904 905 void 906 tunable_quad_init(void *data) 907 { 908 struct tunable_quad *d = (struct tunable_quad *)data; 909 910 TUNABLE_QUAD_FETCH(d->path, d->var); 911 } 912 913 void 914 tunable_str_init(void *data) 915 { 916 struct tunable_str *d = (struct tunable_str *)data; 917 918 TUNABLE_STR_FETCH(d->path, d->var, d->size); 919 } 920