1 /* 2 * Copyright (c) 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)from: sysctl.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 static const char rcsid[] = 41 "$FreeBSD$"; 42 #endif /* not lint */ 43 44 #ifdef __i386__ 45 #include <sys/reboot.h> /* used for bootdev parsing */ 46 #endif 47 #include <sys/param.h> 48 #include <sys/time.h> 49 #include <sys/resource.h> 50 #include <sys/stat.h> 51 #include <sys/sysctl.h> 52 #include <sys/vmmeter.h> 53 54 #include <ctype.h> 55 #include <err.h> 56 #include <errno.h> 57 #include <locale.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 static int aflag, bflag, dflag, eflag, hflag, Nflag, nflag, oflag; 64 static int qflag, xflag; 65 66 static int oidfmt(int *, int, char *, u_int *); 67 static void parse(char *); 68 static int show_var(int *, int); 69 static int sysctl_all (int *oid, int len); 70 static int name2oid(char *, int *); 71 72 static void set_T_dev_t (char *, void **, size_t *); 73 74 static void 75 usage(void) 76 { 77 78 (void)fprintf(stderr, "%s\n%s\n", 79 "usage: sysctl [-bdehNnoqx] name[=value] ...", 80 " sysctl [-bdehNnoqx] -a"); 81 exit(1); 82 } 83 84 int 85 main(int argc, char **argv) 86 { 87 int ch; 88 89 setlocale(LC_NUMERIC, ""); 90 setbuf(stdout,0); 91 setbuf(stderr,0); 92 93 while ((ch = getopt(argc, argv, "AabdehNnoqwxX")) != -1) { 94 switch (ch) { 95 case 'A': 96 /* compatibility */ 97 aflag = oflag = 1; 98 break; 99 case 'a': 100 aflag = 1; 101 break; 102 case 'b': 103 bflag = 1; 104 break; 105 case 'd': 106 dflag = 1; 107 break; 108 case 'e': 109 eflag = 1; 110 break; 111 case 'h': 112 hflag = 1; 113 break; 114 case 'N': 115 Nflag = 1; 116 break; 117 case 'n': 118 nflag = 1; 119 break; 120 case 'o': 121 oflag = 1; 122 break; 123 case 'q': 124 qflag = 1; 125 break; 126 case 'w': 127 /* compatibility */ 128 /* ignored */ 129 break; 130 case 'X': 131 /* compatibility */ 132 aflag = xflag = 1; 133 break; 134 case 'x': 135 xflag = 1; 136 break; 137 default: 138 usage(); 139 } 140 } 141 argc -= optind; 142 argv += optind; 143 144 if (Nflag && nflag) 145 usage(); 146 if (aflag && argc == 0) 147 exit(sysctl_all(0, 0)); 148 if (argc == 0) 149 usage(); 150 while (argc-- > 0) 151 parse(*argv++); 152 exit(0); 153 } 154 155 /* 156 * Parse a name into a MIB entry. 157 * Lookup and print out the MIB entry if it exists. 158 * Set a new value if requested. 159 */ 160 static void 161 parse(char *string) 162 { 163 int len, i, j; 164 void *newval = 0; 165 int intval; 166 unsigned int uintval; 167 long longval; 168 unsigned long ulongval; 169 size_t newsize = 0; 170 quad_t quadval; 171 int mib[CTL_MAXNAME]; 172 char *cp, *bufp, buf[BUFSIZ], *endptr, fmt[BUFSIZ]; 173 u_int kind; 174 175 bufp = buf; 176 if (snprintf(buf, BUFSIZ, "%s", string) >= BUFSIZ) 177 errx(1, "oid too long: '%s'", string); 178 if ((cp = strchr(string, '=')) != NULL) { 179 *strchr(buf, '=') = '\0'; 180 *cp++ = '\0'; 181 while (isspace(*cp)) 182 cp++; 183 newval = cp; 184 newsize = strlen(cp); 185 } 186 len = name2oid(bufp, mib); 187 188 if (len < 0) { 189 if (qflag) 190 exit(1); 191 else 192 errx(1, "unknown oid '%s'", bufp); 193 } 194 195 if (oidfmt(mib, len, fmt, &kind)) 196 err(1, "couldn't find format of oid '%s'", bufp); 197 198 if (newval == NULL) { 199 if ((kind & CTLTYPE) == CTLTYPE_NODE) { 200 if (dflag) { 201 i = show_var(mib, len); 202 if (!i && !bflag) 203 putchar('\n'); 204 } 205 sysctl_all(mib, len); 206 } else { 207 i = show_var(mib, len); 208 if (!i && !bflag) 209 putchar('\n'); 210 } 211 } else { 212 if ((kind & CTLTYPE) == CTLTYPE_NODE) 213 errx(1, "oid '%s' isn't a leaf node", bufp); 214 215 if (!(kind & CTLFLAG_WR)) { 216 if (kind & CTLFLAG_TUN) { 217 warnx("oid '%s' is a read only tunable", bufp); 218 errx(1, "Tunable values are set in /boot/loader.conf"); 219 } else { 220 errx(1, "oid '%s' is read only", bufp); 221 } 222 } 223 224 if ((kind & CTLTYPE) == CTLTYPE_INT || 225 (kind & CTLTYPE) == CTLTYPE_UINT || 226 (kind & CTLTYPE) == CTLTYPE_LONG || 227 (kind & CTLTYPE) == CTLTYPE_ULONG || 228 (kind & CTLTYPE) == CTLTYPE_QUAD) { 229 if (strlen(newval) == 0) 230 errx(1, "empty numeric value"); 231 } 232 233 switch (kind & CTLTYPE) { 234 case CTLTYPE_INT: 235 intval = (int)strtol(newval, &endptr, 0); 236 if (endptr == newval || *endptr != '\0') 237 errx(1, "invalid integer '%s'", 238 newval); 239 newval = &intval; 240 newsize = sizeof(intval); 241 break; 242 case CTLTYPE_UINT: 243 uintval = (int) strtoul(newval, &endptr, 0); 244 if (endptr == newval || *endptr != '\0') 245 errx(1, "invalid unsigned integer '%s'", 246 newval); 247 newval = &uintval; 248 newsize = sizeof uintval; 249 break; 250 case CTLTYPE_LONG: 251 longval = strtol(newval, &endptr, 0); 252 if (endptr == newval || *endptr != '\0') 253 errx(1, "invalid long integer '%s'", 254 newval); 255 newval = &longval; 256 newsize = sizeof longval; 257 break; 258 case CTLTYPE_ULONG: 259 ulongval = strtoul(newval, &endptr, 0); 260 if (endptr == newval || *endptr != '\0') 261 errx(1, "invalid unsigned long integer" 262 " '%s'", newval); 263 newval = &ulongval; 264 newsize = sizeof ulongval; 265 break; 266 case CTLTYPE_STRING: 267 break; 268 case CTLTYPE_QUAD: 269 sscanf(newval, "%qd", &quadval); 270 newval = &quadval; 271 newsize = sizeof(quadval); 272 break; 273 case CTLTYPE_OPAQUE: 274 if (strcmp(fmt, "T,dev_t") == 0) { 275 set_T_dev_t ((char*)newval, &newval, &newsize); 276 break; 277 } 278 /* FALLTHROUGH */ 279 default: 280 errx(1, "oid '%s' is type %d," 281 " cannot set that", bufp, 282 kind & CTLTYPE); 283 } 284 285 i = show_var(mib, len); 286 if (sysctl(mib, len, 0, 0, newval, newsize) == -1) { 287 if (!i && !bflag) 288 putchar('\n'); 289 switch (errno) { 290 case EOPNOTSUPP: 291 errx(1, "%s: value is not available", 292 string); 293 case ENOTDIR: 294 errx(1, "%s: specification is incomplete", 295 string); 296 case ENOMEM: 297 errx(1, "%s: type is unknown to this program", 298 string); 299 default: 300 warn("%s", string); 301 return; 302 } 303 } 304 if (!bflag) 305 printf(" -> "); 306 i = nflag; 307 nflag = 1; 308 j = show_var(mib, len); 309 if (!j && !bflag) 310 putchar('\n'); 311 nflag = i; 312 } 313 } 314 315 /* These functions will dump out various interesting structures. */ 316 317 static int 318 S_clockinfo(int l2, void *p) 319 { 320 struct clockinfo *ci = (struct clockinfo*)p; 321 if (l2 != sizeof(*ci)) { 322 warnx("S_clockinfo %d != %d", l2, sizeof(*ci)); 323 return (0); 324 } 325 printf(hflag ? "{ hz = %'d, tick = %'d, profhz = %'d, stathz = %'d }" : 326 "{ hz = %d, tick = %d, profhz = %d, stathz = %d }", 327 ci->hz, ci->tick, ci->profhz, ci->stathz); 328 return (0); 329 } 330 331 static int 332 S_loadavg(int l2, void *p) 333 { 334 struct loadavg *tv = (struct loadavg*)p; 335 336 if (l2 != sizeof(*tv)) { 337 warnx("S_loadavg %d != %d", l2, sizeof(*tv)); 338 return (0); 339 } 340 printf(hflag ? "{ %'.2f %'.2f %'.2f }" : "{ %.2f %.2f %.2f }", 341 (double)tv->ldavg[0]/(double)tv->fscale, 342 (double)tv->ldavg[1]/(double)tv->fscale, 343 (double)tv->ldavg[2]/(double)tv->fscale); 344 return (0); 345 } 346 347 static int 348 S_timeval(int l2, void *p) 349 { 350 struct timeval *tv = (struct timeval*)p; 351 time_t tv_sec; 352 char *p1, *p2; 353 354 if (l2 != sizeof(*tv)) { 355 warnx("S_timeval %d != %d", l2, sizeof(*tv)); 356 return (0); 357 } 358 printf(hflag ? "{ sec = %'ld, usec = %'ld } " : 359 "{ sec = %ld, usec = %ld } ", 360 tv->tv_sec, tv->tv_usec); 361 tv_sec = tv->tv_sec; 362 p1 = strdup(ctime(&tv_sec)); 363 for (p2=p1; *p2 ; p2++) 364 if (*p2 == '\n') 365 *p2 = '\0'; 366 fputs(p1, stdout); 367 return (0); 368 } 369 370 static int 371 S_vmtotal(int l2, void *p) 372 { 373 struct vmtotal *v = (struct vmtotal *)p; 374 int pageKilo = getpagesize() / 1024; 375 376 if (l2 != sizeof(*v)) { 377 warnx("S_vmtotal %d != %d", l2, sizeof(*v)); 378 return (0); 379 } 380 381 printf( 382 "\nSystem wide totals computed every five seconds:" 383 " (values in kilobytes)\n"); 384 printf("===============================================\n"); 385 printf( 386 "Processes:\t\t(RUNQ: %hu Disk Wait: %hu Page Wait: " 387 "%hu Sleep: %hu)\n", 388 v->t_rq, v->t_dw, v->t_pw, v->t_sl); 389 printf( 390 "Virtual Memory:\t\t(Total: %luK, Active %lldK)\n", 391 (unsigned long)v->t_vm / 1024, 392 (long long)v->t_avm * pageKilo); 393 printf("Real Memory:\t\t(Total: %lldK Active %lldK)\n", 394 (long long)v->t_rm * pageKilo, (long long)v->t_arm * pageKilo); 395 printf("Shared Virtual Memory:\t(Total: %lldK Active: %lldK)\n", 396 (long long)v->t_vmshr * pageKilo, 397 (long long)v->t_avmshr * pageKilo); 398 printf("Shared Real Memory:\t(Total: %lldK Active: %lldK)\n", 399 (long long)v->t_rmshr * pageKilo, 400 (long long)v->t_armshr * pageKilo); 401 printf("Free Memory Pages:\t%lldK\n", (long long)v->t_free * pageKilo); 402 403 return (0); 404 } 405 406 static int 407 T_dev_t(int l2, void *p) 408 { 409 dev_t *d = (dev_t *)p; 410 if (l2 != sizeof(*d)) { 411 warnx("T_dev_T %d != %d", l2, sizeof(*d)); 412 return (0); 413 } 414 if ((int)(*d) != -1) { 415 if (minor(*d) > 255 || minor(*d) < 0) 416 printf("{ major = %d, minor = 0x%x }", 417 major(*d), minor(*d)); 418 else 419 printf("{ major = %d, minor = %d }", 420 major(*d), minor(*d)); 421 } 422 return (0); 423 } 424 425 static void 426 set_T_dev_t (char *path, void **val, size_t *size) 427 { 428 static struct stat statb; 429 430 if (strcmp(path, "none") && strcmp(path, "off")) { 431 int rc = stat (path, &statb); 432 if (rc) { 433 err(1, "cannot stat %s", path); 434 } 435 436 if (!S_ISCHR(statb.st_mode)) { 437 errx(1, "must specify a device special file."); 438 } 439 } else { 440 statb.st_rdev = NODEV; 441 } 442 *val = (char*) &statb.st_rdev; 443 *size = sizeof statb.st_rdev; 444 } 445 446 /* 447 * These functions uses a presently undocumented interface to the kernel 448 * to walk the tree and get the type so it can print the value. 449 * This interface is under work and consideration, and should probably 450 * be killed with a big axe by the first person who can find the time. 451 * (be aware though, that the proper interface isn't as obvious as it 452 * may seem, there are various conflicting requirements. 453 */ 454 455 static int 456 name2oid(char *name, int *oidp) 457 { 458 int oid[2]; 459 int i; 460 size_t j; 461 462 oid[0] = 0; 463 oid[1] = 3; 464 465 j = CTL_MAXNAME * sizeof(int); 466 i = sysctl(oid, 2, oidp, &j, name, strlen(name)); 467 if (i < 0) 468 return i; 469 j /= sizeof(int); 470 return (j); 471 } 472 473 static int 474 oidfmt(int *oid, int len, char *fmt, u_int *kind) 475 { 476 int qoid[CTL_MAXNAME+2]; 477 u_char buf[BUFSIZ]; 478 int i; 479 size_t j; 480 481 qoid[0] = 0; 482 qoid[1] = 4; 483 memcpy(qoid + 2, oid, len * sizeof(int)); 484 485 j = sizeof(buf); 486 i = sysctl(qoid, len + 2, buf, &j, 0, 0); 487 if (i) 488 err(1, "sysctl fmt %d %d %d", i, j, errno); 489 490 if (kind) 491 *kind = *(u_int *)buf; 492 493 if (fmt) 494 strcpy(fmt, (char *)(buf + sizeof(u_int))); 495 return 0; 496 } 497 498 /* 499 * This formats and outputs the value of one variable 500 * 501 * Returns zero if anything was actually output. 502 * Returns one if didn't know what to do with this. 503 * Return minus one if we had errors. 504 */ 505 506 static int 507 show_var(int *oid, int nlen) 508 { 509 u_char buf[BUFSIZ], *val, *p; 510 char name[BUFSIZ], *fmt, *sep; 511 int qoid[CTL_MAXNAME+2]; 512 int i; 513 size_t j, len; 514 u_int kind; 515 int (*func)(int, void *); 516 517 bzero(buf, BUFSIZ); 518 bzero(name, BUFSIZ); 519 qoid[0] = 0; 520 memcpy(qoid + 2, oid, nlen * sizeof(int)); 521 522 qoid[1] = 1; 523 j = sizeof(name); 524 i = sysctl(qoid, nlen + 2, name, &j, 0, 0); 525 if (i || !j) 526 err(1, "sysctl name %d %d %d", i, j, errno); 527 528 if (Nflag) { 529 printf("%s", name); 530 return (0); 531 } 532 533 if (eflag) 534 sep = "="; 535 else 536 sep = ": "; 537 538 if (dflag) { /* just print description */ 539 qoid[1] = 5; 540 j = sizeof(buf); 541 i = sysctl(qoid, nlen + 2, buf, &j, 0, 0); 542 if (!nflag) 543 printf("%s%s", name, sep); 544 printf("%s", buf); 545 return (0); 546 } 547 /* find an estimate of how much we need for this var */ 548 j = 0; 549 i = sysctl(oid, nlen, 0, &j, 0, 0); 550 j += j; /* we want to be sure :-) */ 551 552 val = alloca(j + 1); 553 len = j; 554 i = sysctl(oid, nlen, val, &len, 0, 0); 555 if (i || !len) 556 return (1); 557 558 if (bflag) { 559 fwrite(val, 1, len, stdout); 560 return (0); 561 } 562 val[len] = '\0'; 563 fmt = buf; 564 oidfmt(oid, nlen, fmt, &kind); 565 p = val; 566 switch (*fmt) { 567 case 'A': 568 if (!nflag) 569 printf("%s%s", name, sep); 570 printf("%.*s", len, p); 571 return (0); 572 573 case 'I': 574 if (!nflag) 575 printf("%s%s", name, sep); 576 fmt++; 577 val = ""; 578 while (len >= sizeof(int)) { 579 fputs(val, stdout); 580 if(*fmt == 'U') 581 printf(hflag ? "%'u" : "%u", *(unsigned int *)p); 582 else if (*fmt == 'K') { 583 if (*(int *)p < 0) 584 printf("%d", *(int *)p); 585 else 586 printf("%d.%dC", (*(int *)p - 2732) / 10, (*(int *)p - 2732) % 10); 587 } else 588 printf(hflag ? "%'d" : "%d", *(int *)p); 589 val = " "; 590 len -= sizeof(int); 591 p += sizeof(int); 592 } 593 return (0); 594 595 case 'L': 596 if (!nflag) 597 printf("%s%s", name, sep); 598 fmt++; 599 val = ""; 600 while (len >= sizeof(long)) { 601 fputs(val, stdout); 602 if(*fmt == 'U') 603 printf(hflag ? "%'lu" : "%lu", *(unsigned long *)p); 604 else if (*fmt == 'K') { 605 if (*(long *)p < 0) 606 printf("%ld", *(long *)p); 607 else 608 printf("%ld.%ldC", (*(long *)p - 2732) / 10, (*(long *)p - 2732) % 10); 609 } else 610 printf(hflag ? "%'ld" : "%ld", *(long *)p); 611 val = " "; 612 len -= sizeof(long); 613 p += sizeof(long); 614 } 615 return (0); 616 617 case 'P': 618 if (!nflag) 619 printf("%s%s", name, sep); 620 printf("%p", *(void **)p); 621 return (0); 622 623 case 'T': 624 case 'S': 625 i = 0; 626 if (strcmp(fmt, "S,clockinfo") == 0) 627 func = S_clockinfo; 628 else if (strcmp(fmt, "S,timeval") == 0) 629 func = S_timeval; 630 else if (strcmp(fmt, "S,loadavg") == 0) 631 func = S_loadavg; 632 else if (strcmp(fmt, "S,vmtotal") == 0) 633 func = S_vmtotal; 634 else if (strcmp(fmt, "T,dev_t") == 0) 635 func = T_dev_t; 636 else 637 func = NULL; 638 if (func) { 639 if (!nflag) 640 printf("%s%s", name, sep); 641 return ((*func)(len, p)); 642 } 643 /* FALLTHROUGH */ 644 default: 645 if (!oflag && !xflag) 646 return (1); 647 if (!nflag) 648 printf("%s%s", name, sep); 649 printf("Format:%s Length:%d Dump:0x", fmt, len); 650 while (len-- && (xflag || p < val + 16)) 651 printf("%02x", *p++); 652 if (!xflag && len > 16) 653 printf("..."); 654 return (0); 655 } 656 return (1); 657 } 658 659 static int 660 sysctl_all (int *oid, int len) 661 { 662 int name1[22], name2[22]; 663 int i, j; 664 size_t l1, l2; 665 666 name1[0] = 0; 667 name1[1] = 2; 668 l1 = 2; 669 if (len) { 670 memcpy(name1+2, oid, len * sizeof(int)); 671 l1 += len; 672 } else { 673 name1[2] = 1; 674 l1++; 675 } 676 for (;;) { 677 l2 = sizeof(name2); 678 j = sysctl(name1, l1, name2, &l2, 0, 0); 679 if (j < 0) { 680 if (errno == ENOENT) 681 return 0; 682 else 683 err(1, "sysctl(getnext) %d %d", j, l2); 684 } 685 686 l2 /= sizeof(int); 687 688 if (l2 < len) 689 return 0; 690 691 for (i = 0; i < len; i++) 692 if (name2[i] != oid[i]) 693 return 0; 694 695 i = show_var(name2, l2); 696 if (!i && !bflag) 697 putchar('\n'); 698 699 memcpy(name1+2, name2, l2 * sizeof(int)); 700 l1 = 2 + l2; 701 } 702 } 703