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