sbin/sysctl/sysctl.c

   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. 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  * @(#) Copyright (c) 1993 The Regents of the University of California.  All rights reserved.
  30  * @(#)from: sysctl.c   8.1 (Berkeley) 6/6/93
  31  * $FreeBSD: src/sbin/sysctl/sysctl.c,v 1.25.2.11 2003/05/01 22:48:08 trhodes Exp $
  32  */
  33
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <sys/sysctl.h>
  37 #include <sys/resource.h>
  38 #include <sys/sensors.h>
  39 #include <sys/param.h>
  40
  41 #ifdef __x86_64__
  42 #include <sys/efi.h>
  43 #include <machine/metadata.h>
  44 #endif
  45
  46 #include <machine/inttypes.h>
  47
  48 #include <ctype.h>
  49 #include <err.h>
  50 #include <errno.h>
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #include <unistd.h>
  55
  56 static int      aflag, bflag, dflag, eflag, Nflag, nflag, oflag, xflag;
  57 static int      iflag, qflag;
  58
  59 static int      oidfmt(int *, size_t, char *, u_int *);
  60 static int      parse(const char *);
  61 static int      show_var(int *, size_t);
  62 static int      sysctl_all(int *, size_t);
  63 static void     set_T_dev_t(const char *, void **, size_t *);
  64 static int      set_IK(const char *, int *);
  65
  66 static void
  67 usage(void)
  68 {
  69
  70         fprintf(stderr, "%s\n%s\n",
  71             "usage: sysctl [-bdeNnox] variable[=value] ...",
  72             "       sysctl [-bdeNnox] -a");
  73         exit(1);
  74 }
  75
  76 int
  77 main(int argc, char **argv)
  78 {
  79         int ch;
  80         int warncount;
  81
  82         setbuf(stdout,0);
  83         setbuf(stderr,0);
  84
  85         while ((ch = getopt(argc, argv, "AabdeiNnoqwxX")) != -1) {
  86                 switch (ch) {
  87                 case 'A':
  88                         /* compatibility */
  89                         aflag = oflag = 1;
  90                         break;
  91                 case 'a':
  92                         aflag = 1;
  93                         break;
  94                 case 'b':
  95                         bflag = 1;
  96                         break;
  97                 case 'd':
  98                         dflag = 1;
  99                         break;
 100                 case 'e':
 101                         eflag = 1;
 102                         break;
 103                 case 'i':
 104                         iflag = 1;
 105                         break;
 106                 case 'N':
 107                         Nflag = 1;
 108                         break;
 109                 case 'n':
 110                         nflag = 1;
 111                         break;
 112                 case 'o':
 113                         oflag = 1;
 114                         break;
 115                 case 'q':
 116                         qflag = 1;
 117                         break;
 118                 case 'w':
 119                         /* compatibility */
 120                         /* ignored */
 121                         break;
 122                 case 'X':
 123                         /* compatibility */
 124                         aflag = xflag = 1;
 125                         break;
 126                 case 'x':
 127                         xflag = 1;
 128                         break;
 129                 default:
 130                         usage();
 131                 }
 132         }
 133         argc -= optind;
 134         argv += optind;
 135
 136         if (Nflag && nflag)
 137                 usage();
 138         if (aflag && argc == 0)
 139                 exit(sysctl_all(0, 0));
 140         if (argc == 0)
 141                 usage();
 142         warncount = 0;
 143         while (argc-- > 0)
 144                 warncount += parse(*argv++);
 145
 146         return warncount;
 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 int
 155 parse(const char *string)
 156 {
 157         size_t len;
 158         int i, j;
 159         void *newval = NULL;
 160         int intval;
 161         unsigned int uintval;
 162         long longval;
 163         unsigned long ulongval;
 164         size_t newsize = 0;
 165         quad_t quadval;
 166         u_quad_t uquadval;
 167         int mib[CTL_MAXNAME];
 168         char *cp, fmt[BUFSIZ];
 169         const char *name;
 170         char *name_allocated = NULL;
 171         u_int kind;
 172
 173         if ((cp = strchr(string, '=')) != NULL) {
 174                 if ((name_allocated = malloc(cp - string + 1)) == NULL)
 175                         err(1, "malloc failed");
 176                 strlcpy(name_allocated, string, cp - string + 1);
 177                 name = name_allocated;
 178
 179                 while (isspace(*++cp))
 180                         ;
 181
 182                 newval = cp;
 183                 newsize = strlen(cp);
 184         } else {
 185                 name = string;
 186         }
 187
 188         len = CTL_MAXNAME;
 189         if (sysctlnametomib(name, mib, &len) < 0) {
 190                 if (iflag)
 191                         return 0;
 192                 if (qflag)
 193                         return 1;
 194                 if (errno == ENOENT) {
 195                         errx(1, "unknown oid '%s'", name);
 196                 } else {
 197                         err(1, "sysctlnametomib(\"%s\")", name);
 198                 }
 199         }
 200
 201         if (oidfmt(mib, len, fmt, &kind)) {
 202                 warn("couldn't find format of oid '%s'", name);
 203                 if (iflag)
 204                         return 1;
 205                 exit(1);
 206         }
 207
 208         if (newval == NULL) {
 209                 if ((kind & CTLTYPE) == CTLTYPE_NODE) {
 210                         sysctl_all(mib, len);
 211                 } else {
 212                         i = show_var(mib, len);
 213                         if (!i && !bflag)
 214                                 putchar('\n');
 215                 }
 216         } else {
 217                 if ((kind & CTLTYPE) == CTLTYPE_NODE)
 218                         errx(1, "oid '%s' isn't a leaf node", name);
 219
 220                 if (!(kind&CTLFLAG_WR))
 221                         errx(1, "oid '%s' is read only", name);
 222
 223                 switch (kind & CTLTYPE) {
 224                         case CTLTYPE_INT:
 225                                 if (!(strcmp(fmt, "IK") == 0)) {
 226                                         if (!set_IK(newval, &intval))
 227                                                 errx(1, "invalid value '%s'",
 228                                                     (char *)newval);
 229                                 } else
 230                                         intval = (int) strtol(newval, NULL, 0);
 231                                 newval = &intval;
 232                                 newsize = sizeof(intval);
 233                                 break;
 234                         case CTLTYPE_UINT:
 235                                 uintval = (int) strtoul(newval, NULL, 0);
 236                                 newval = &uintval;
 237                                 newsize = sizeof uintval;
 238                                 break;
 239                         case CTLTYPE_LONG:
 240                                 longval = strtol(newval, NULL, 0);
 241                                 newval = &longval;
 242                                 newsize = sizeof longval;
 243                                 break;
 244                         case CTLTYPE_ULONG:
 245                                 ulongval = strtoul(newval, NULL, 0);
 246                                 newval = &ulongval;
 247                                 newsize = sizeof ulongval;
 248                                 break;
 249                         case CTLTYPE_STRING:
 250                                 break;
 251                         case CTLTYPE_QUAD:
 252                                 quadval = strtoq(newval, NULL, 0);
 253                                 newval = &quadval;
 254                                 newsize = sizeof(quadval);
 255                                 break;
 256                         case CTLTYPE_UQUAD:
 257                                 uquadval = strtouq(newval, NULL, 0);
 258                                 newval = &uquadval;
 259                                 newsize = sizeof(uquadval);
 260                                 break;
 261                         case CTLTYPE_OPAQUE:
 262                                 if (strcmp(fmt, "T,dev_t") == 0 ||
 263                                     strcmp(fmt, "T,udev_t") == 0
 264                                 ) {
 265                                         set_T_dev_t((char*)newval, &newval,
 266                                                     &newsize);
 267                                         break;
 268                                 }
 269                                 /* FALLTHROUGH */
 270                         default:
 271                                 errx(1, "oid '%s' is type %d,"
 272                                         " cannot set that", name,
 273                                         kind & CTLTYPE);
 274                 }
 275
 276                 i = show_var(mib, len);
 277                 if (sysctl(mib, len, 0, 0, newval, newsize) == -1) {
 278                         if (!i && !bflag)
 279                                 putchar('\n');
 280                         switch (errno) {
 281                         case EOPNOTSUPP:
 282                                 errx(1, "%s: value is not available",
 283                                         string);
 284                         case ENOTDIR:
 285                                 errx(1, "%s: specification is incomplete",
 286                                         string);
 287                         case ENOMEM:
 288                                 errx(1, "%s: type is unknown to this program",
 289                                         string);
 290                         default:
 291                                 warn("%s", string);
 292                                 return 1;
 293                         }
 294                 }
 295                 if (!bflag)
 296                         printf(" -> ");
 297                 i = nflag;
 298                 nflag = 1;
 299                 j = show_var(mib, len);
 300                 if (!j && !bflag)
 301                         putchar('\n');
 302                 nflag = i;
 303         }
 304
 305         if (name_allocated != NULL)
 306                 free(name_allocated);
 307
 308         return 0;
 309 }
 310
 311 /* These functions will dump out various interesting structures. */
 312
 313 static int
 314 S_clockinfo(size_t l2, void *p)
 315 {
 316         struct clockinfo *ci = (struct clockinfo*)p;
 317         if (l2 != sizeof(*ci))
 318                 err(1, "S_clockinfo %zu != %zu", l2, sizeof(*ci));
 319         printf("{ hz = %d, tick = %d, tickadj = %d, profhz = %d, stathz = %d }",
 320                 ci->hz, ci->tick, ci->tickadj, ci->profhz, ci->stathz);
 321         return (0);
 322 }
 323
 324 static int
 325 S_loadavg(size_t l2, void *p)
 326 {
 327         struct loadavg *tv = (struct loadavg*)p;
 328
 329         if (l2 != sizeof(*tv))
 330                 err(1, "S_loadavg %zu != %zu", l2, sizeof(*tv));
 331
 332         printf("{ %.2f %.2f %.2f }",
 333                 (double)tv->ldavg[0]/(double)tv->fscale,
 334                 (double)tv->ldavg[1]/(double)tv->fscale,
 335                 (double)tv->ldavg[2]/(double)tv->fscale);
 336         return (0);
 337 }
 338
 339 static int
 340 S_timespec(size_t l2, void *p)
 341 {
 342         struct timespec *ts = (struct timespec*)p;
 343         time_t tv_sec;
 344         char *p1, *p2;
 345
 346         if (l2 != sizeof(*ts))
 347                 err(1, "S_timespec %zu != %zu", l2, sizeof(*ts));
 348         printf("{ sec = %ld, nsec = %ld } ",
 349                 ts->tv_sec, ts->tv_nsec);
 350         tv_sec = ts->tv_sec;
 351         p1 = strdup(ctime(&tv_sec));
 352         for (p2=p1; *p2 ; p2++)
 353                 if (*p2 == '\n')
 354                         *p2 = '\0';
 355         fputs(p1, stdout);
 356         return (0);
 357 }
 358
 359 static int
 360 S_timeval(size_t l2, void *p)
 361 {
 362         struct timeval *tv = (struct timeval*)p;
 363         time_t tv_sec;
 364         char *p1, *p2;
 365
 366         if (l2 != sizeof(*tv))
 367                 err(1, "S_timeval %zu != %zu", l2, sizeof(*tv));
 368         printf("{ sec = %ld, usec = %ld } ",
 369                 tv->tv_sec, tv->tv_usec);
 370         tv_sec = tv->tv_sec;
 371         p1 = strdup(ctime(&tv_sec));
 372         for (p2=p1; *p2 ; p2++)
 373                 if (*p2 == '\n')
 374                         *p2 = '\0';
 375         fputs(p1, stdout);
 376         return (0);
 377 }
 378
 379 static int
 380 S_sensor(size_t l2, void *p)
 381 {
 382         struct sensor *s = (struct sensor *)p;
 383
 384         if (l2 != sizeof(*s)) {
 385                 warnx("S_sensor %zu != %zu", l2, sizeof(*s));
 386                 return (1);
 387         }
 388
 389         if (s->flags & SENSOR_FINVALID) {
 390                 /*
 391                  * XXX: with this flag, the node should be entirely ignored,
 392                  * but as the magic-based sysctl(8) is not too flexible, we
 393                  * simply have to print out that the sensor is invalid.
 394                  */
 395                 printf("invalid");
 396                 return (0);
 397         }
 398
 399         if (s->flags & SENSOR_FUNKNOWN)
 400                 printf("unknown");
 401         else {
 402                 switch (s->type) {
 403                 case SENSOR_TEMP:
 404                         printf("%.2f degC",
 405                             (s->value - 273150000) / 1000000.0);
 406                         break;
 407                 case SENSOR_FANRPM:
 408                         printf("%jd RPM", (intmax_t)s->value);
 409                         break;
 410                 case SENSOR_VOLTS_DC:
 411                         printf("%.2f VDC", s->value / 1000000.0);
 412                         break;
 413                 case SENSOR_WATTS:
 414                         printf("%.2f W", s->value / 1000000.0);
 415                         break;
 416                 case SENSOR_AMPS:
 417                         printf("%.2f A", s->value / 1000000.0);
 418                         break;
 419                 case SENSOR_WATTHOUR:
 420                         printf("%.2f Wh", s->value / 1000000.0);
 421                         break;
 422                 case SENSOR_AMPHOUR:
 423                         printf("%.2f Ah", s->value / 1000000.0);
 424                         break;
 425                 case SENSOR_INDICATOR:
 426                         printf("%s", s->value ? "On" : "Off");
 427                         break;
 428                 case SENSOR_FREQ:
 429                         printf("%jd Hz", (intmax_t)s->value);
 430                         break;
 431                 case SENSOR_ECC:
 432                 case SENSOR_INTEGER:
 433                         printf("%jd", (intmax_t)s->value);
 434                         break;
 435                 case SENSOR_PERCENT:
 436                         printf("%.2f%%", s->value / 1000.0);
 437                         break;
 438                 case SENSOR_LUX:
 439                         printf("%.2f lx", s->value / 1000000.0);
 440                         break;
 441                 case SENSOR_DRIVE:
 442                 {
 443                         const char *name;
 444
 445                         switch (s->value) {
 446                         case SENSOR_DRIVE_EMPTY:
 447                                 name = "empty";
 448                                 break;
 449                         case SENSOR_DRIVE_READY:
 450                                 name = "ready";
 451                                 break;
 452                         case SENSOR_DRIVE_POWERUP:
 453                                 name = "powering up";
 454                                 break;
 455                         case SENSOR_DRIVE_ONLINE:
 456                                 name = "online";
 457                                 break;
 458                         case SENSOR_DRIVE_IDLE:
 459                                 name = "idle";
 460                                 break;
 461                         case SENSOR_DRIVE_ACTIVE:
 462                                 name = "active";
 463                                 break;
 464                         case SENSOR_DRIVE_REBUILD:
 465                                 name = "rebuilding";
 466                                 break;
 467                         case SENSOR_DRIVE_POWERDOWN:
 468                                 name = "powering down";
 469                                 break;
 470                         case SENSOR_DRIVE_FAIL:
 471                                 name = "failed";
 472                                 break;
 473                         case SENSOR_DRIVE_PFAIL:
 474                                 name = "degraded";
 475                                 break;
 476                         default:
 477                                 name = "unknown";
 478                                 break;
 479                         }
 480                         printf("%s", name);
 481                         break;
 482                 }
 483                 case SENSOR_TIMEDELTA:
 484                         printf("%.6f secs", s->value / 1000000000.0);
 485                         break;
 486                 default:
 487                         printf("unknown");
 488                 }
 489         }
 490
 491         if (s->desc[0] != '\0')
 492                 printf(" (%s)", s->desc);
 493
 494         switch (s->status) {
 495         case SENSOR_S_UNSPEC:
 496                 break;
 497         case SENSOR_S_OK:
 498                 printf(", OK");
 499                 break;
 500         case SENSOR_S_WARN:
 501                 printf(", WARNING");
 502                 break;
 503         case SENSOR_S_CRIT:
 504                 printf(", CRITICAL");
 505                 break;
 506         case SENSOR_S_UNKNOWN:
 507                 printf(", UNKNOWN");
 508                 break;
 509         }
 510
 511         if (s->tv.tv_sec) {
 512                 time_t t = s->tv.tv_sec;
 513                 char ct[26];
 514
 515                 ctime_r(&t, ct);
 516                 ct[19] = '\0';
 517                 printf(", %s.%03ld", ct, s->tv.tv_usec / 1000);
 518         }
 519
 520         return (0);
 521 }
 522
 523 #ifdef __x86_64__
 524 static int
 525 S_efi_map(size_t l2, void *p)
 526 {
 527         struct efi_map_header *efihdr;
 528         struct efi_md *map;
 529         const char *type;
 530         size_t efisz;
 531         int ndesc, i;
 532
 533         static const char *types[] = {
 534                 "Reserved",
 535                 "LoaderCode",
 536                 "LoaderData",
 537                 "BootServicesCode",
 538                 "BootServicesData",
 539                 "RuntimeServicesCode",
 540                 "RuntimeServicesData",
 541                 "ConventionalMemory",
 542                 "UnusableMemory",
 543                 "ACPIReclaimMemory",
 544                 "ACPIMemoryNVS",
 545                 "MemoryMappedIO",
 546                 "MemoryMappedIOPortSpace",
 547                 "PalCode"
 548         };
 549
 550         /*
 551          * Memory map data provided by UEFI via the GetMemoryMap
 552          * Boot Services API.
 553          */
 554         if (l2 < sizeof(*efihdr)) {
 555                 warnx("S_efi_map length less than header");
 556                 return (1);
 557         }
 558         efihdr = p;
 559         efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
 560         map = (struct efi_md *)((uint8_t *)efihdr + efisz);
 561
 562         if (efihdr->descriptor_size == 0)
 563                 return (0);
 564         if (l2 != efisz + efihdr->memory_size) {
 565                 warnx("S_efi_map length mismatch %zu vs %zu", l2, efisz +
 566                     efihdr->memory_size);
 567                 return (1);
 568         }
 569         ndesc = efihdr->memory_size / efihdr->descriptor_size;
 570
 571         printf("\n%23s %12s %12s %8s %4s",
 572             "Type", "Physical", "Virtual", "#Pages", "Attr");
 573
 574         for (i = 0; i < ndesc; i++,
 575             map = efi_next_descriptor(map, efihdr->descriptor_size)) {
 576                 if (map->md_type <= EFI_MD_TYPE_PALCODE)
 577                         type = types[map->md_type];
 578                 else
 579                         type = "<INVALID>";
 580                 printf("\n%23s %012lx %12p %08lx ", type, map->md_phys,
 581                     map->md_virt, map->md_pages);
 582                 if (map->md_attr & EFI_MD_ATTR_UC)
 583                         printf("UC ");
 584                 if (map->md_attr & EFI_MD_ATTR_WC)
 585                         printf("WC ");
 586                 if (map->md_attr & EFI_MD_ATTR_WT)
 587                         printf("WT ");
 588                 if (map->md_attr & EFI_MD_ATTR_WB)
 589                         printf("WB ");
 590                 if (map->md_attr & EFI_MD_ATTR_UCE)
 591                         printf("UCE ");
 592                 if (map->md_attr & EFI_MD_ATTR_WP)
 593                         printf("WP ");
 594                 if (map->md_attr & EFI_MD_ATTR_RP)
 595                         printf("RP ");
 596                 if (map->md_attr & EFI_MD_ATTR_XP)
 597                         printf("XP ");
 598                 if (map->md_attr & EFI_MD_ATTR_RT)
 599                         printf("RUNTIME");
 600         }
 601         return (0);
 602 }
 603 #endif
 604
 605 static int
 606 T_dev_t(size_t l2, void *p)
 607 {
 608         dev_t *d = (dev_t *)p;
 609         if (l2 != sizeof(*d))
 610                 err(1, "T_dev_T %zu != %zu", l2, sizeof(*d));
 611         if ((int)(*d) != -1) {
 612                 if (minor(*d) > 255 || minor(*d) < 0)
 613                         printf("{ major = %d, minor = 0x%x }",
 614                                 major(*d), minor(*d));
 615                 else
 616                         printf("{ major = %d, minor = %d }",
 617                                 major(*d), minor(*d));
 618         }
 619         return (0);
 620 }
 621
 622 static void
 623 set_T_dev_t(const char *path, void **val, size_t *size)
 624 {
 625         static struct stat statb;
 626
 627         if (strcmp(path, "none") && strcmp(path, "off")) {
 628                 int rc = stat (path, &statb);
 629                 if (rc) {
 630                         err(1, "cannot stat %s", path);
 631                 }
 632
 633                 if (!S_ISCHR(statb.st_mode)) {
 634                         errx(1, "must specify a device special file.");
 635                 }
 636         } else {
 637                 statb.st_rdev = NODEV;
 638         }
 639         *val = (char*) &statb.st_rdev;
 640         *size = sizeof statb.st_rdev;
 641 }
 642
 643 static int
 644 set_IK(const char *str, int *val)
 645 {
 646         float temp;
 647         int len, kelv;
 648         const char *p;
 649         char *endptr;
 650
 651         if ((len = strlen(str)) == 0)
 652                 return (0);
 653         p = &str[len - 1];
 654         if (*p == 'C' || *p == 'F') {
 655                 temp = strtof(str, &endptr);
 656                 if (endptr == str || endptr != p)
 657                         return 0;
 658                 if (*p == 'F')
 659                         temp = (temp - 32) * 5 / 9;
 660                 kelv = temp * 10 + 2732;
 661         } else {
 662                 /*
 663                  * I would like to just use, 0 but it would make numbers
 664                  * like '023' which were interpreted as decimal before
 665                  * suddenly interpreted as octal.
 666                  */
 667                 if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
 668                         kelv = (int)strtol(str, &endptr, 0);
 669                 else
 670                         kelv = (int)strtol(str, &endptr, 10);
 671                 if (endptr == str || *endptr != '\0')
 672                         return 0;
 673         }
 674         *val = kelv;
 675         return 1;
 676 }
 677
 678 /*
 679  * These functions uses a presently undocumented interface to the kernel
 680  * to walk the tree and get the type so it can print the value.
 681  * This interface is under work and consideration, and should probably
 682  * be killed with a big axe by the first person who can find the time.
 683  * (be aware though, that the proper interface isn't as obvious as it
 684  * may seem, there are various conflicting requirements.
 685  */
 686
 687 static int
 688 oidfmt(int *oid, size_t len, char *fmt, u_int *kind)
 689 {
 690         int qoid[CTL_MAXNAME+2];
 691         u_char buf[BUFSIZ];
 692         int i;
 693         size_t j;
 694
 695         qoid[0] = 0;
 696         qoid[1] = 4;
 697         memcpy(qoid + 2, oid, len * sizeof(int));
 698
 699         j = sizeof(buf);
 700         i = sysctl(qoid, len + 2, buf, &j, 0, 0);
 701         if (i)
 702                 err(1, "sysctl fmt %d %zu %d", i, j, errno);
 703
 704         if (kind)
 705                 *kind = *(u_int *)buf;
 706
 707         if (fmt)
 708                 strcpy(fmt, (char *)(buf + sizeof(u_int)));
 709         return 0;
 710 }
 711
 712 /*
 713  * This formats and outputs the value of one variable
 714  *
 715  * Returns zero if anything was actually output.
 716  * Returns one if didn't know what to do with this.
 717  * Return minus one if we had errors.
 718  */
 719
 720 static int
 721 show_var(int *oid, size_t nlen)
 722 {
 723         u_char buf[BUFSIZ], *val = NULL, *p, *nul;
 724         char name[BUFSIZ], *fmt;
 725         const char *sep, *spacer;
 726         int qoid[CTL_MAXNAME+2];
 727         int i;
 728         size_t j, len;
 729         u_int kind;
 730         int (*func)(size_t, void *);
 731         int error = 0;
 732
 733         qoid[0] = 0;
 734         memcpy(qoid + 2, oid, nlen * sizeof(int));
 735
 736         qoid[1] = 1;
 737         j = sizeof(name);
 738         i = sysctl(qoid, nlen + 2, name, &j, 0, 0);
 739         if (i || !j)
 740                 err(1, "sysctl name %d %zu %d", i, j, errno);
 741
 742         if (Nflag) {
 743                 printf("%s", name);
 744                 return (0);
 745         }
 746
 747         if (eflag)
 748                 sep = "=";
 749         else
 750                 sep = ": ";
 751
 752         if (dflag) {    /* just print description */
 753                 qoid[1] = 5;
 754                 j = sizeof(buf);
 755                 i = sysctl(qoid, nlen + 2, buf, &j, 0, 0);
 756                 if (!nflag)
 757                         printf("%s%s", name, sep);
 758                 printf("%s", buf);
 759                 return(0);
 760         }
 761         /* find an estimate of how much we need for this var */
 762         j = 0;
 763         i = sysctl(oid, nlen, 0, &j, 0, 0);
 764         j += j; /* we want to be sure :-) */
 765
 766         val = malloc(j + 1);
 767         if (val == NULL)
 768                 return (1);
 769
 770         len = j;
 771         i = sysctl(oid, nlen, val, &len, 0, 0);
 772         if (i || !len) {
 773                 error = 1;
 774                 goto done;
 775         }
 776
 777         if (bflag) {
 778                 fwrite(val, 1, len, stdout);
 779                 goto done;
 780         }
 781
 782         val[len] = '\0';
 783         fmt = buf;
 784         oidfmt(oid, nlen, fmt, &kind);
 785         p = val;
 786         switch (*fmt) {
 787         case 'A':
 788                 if (!nflag)
 789                         printf("%s%s", name, sep);
 790                 nul = memchr(p, '\0', len);
 791                 fwrite(p, nul == NULL ? (int)len : nul - p, 1, stdout);
 792                 return (0);
 793
 794         case 'I':
 795                 if (!nflag)
 796                         printf("%s%s", name, sep);
 797                 fmt++;
 798                 spacer = "";
 799                 while (len >= sizeof(int)) {
 800                         if(*fmt == 'U')
 801                                 printf("%s%u", spacer, *(unsigned int *)p);
 802                         else if (*fmt == 'K' && *(int *)p >= 0)
 803                                 printf("%s%.1fC", spacer, (*(int *)p - 2732) / 10.0);
 804                         else
 805                                 printf("%s%d", spacer, *(int *)p);
 806                         spacer = " ";
 807                         len -= sizeof(int);
 808                         p += sizeof(int);
 809                 }
 810                 goto done;
 811
 812         case 'L':
 813                 if (!nflag)
 814                         printf("%s%s", name, sep);
 815                 fmt++;
 816                 spacer = "";
 817                 while (len >= sizeof(long)) {
 818                         if(*fmt == 'U')
 819                                 printf("%s%lu", spacer, *(unsigned long *)p);
 820                         else
 821                                 printf("%s%ld", spacer, *(long *)p);
 822                         spacer = " ";
 823                         len -= sizeof(long);
 824                         p += sizeof(long);
 825                 }
 826                 goto done;
 827
 828         case 'P':
 829                 if (!nflag)
 830                         printf("%s%s", name, sep);
 831                 printf("%p", *(void **)p);
 832                 goto done;
 833
 834         case 'Q':
 835                 if (!nflag)
 836                         printf("%s%s", name, sep);
 837                 fmt++;
 838                 spacer = "";
 839                 while (len >= sizeof(quad_t)) {
 840                         if(*fmt == 'U') {
 841                                 printf("%s%ju",
 842                                        spacer, (uintmax_t)*(u_quad_t *)p);
 843                         } else {
 844                                 printf("%s%jd",
 845                                        spacer, (intmax_t)*(quad_t *)p);
 846                         }
 847                         spacer = " ";
 848                         len -= sizeof(int64_t);
 849                         p += sizeof(int64_t);
 850                 }
 851                 goto done;
 852
 853         case 'T':
 854         case 'S':
 855                 if (!oflag && !xflag) {
 856                         i = 0;
 857                         if (strcmp(fmt, "S,clockinfo") == 0)
 858                                 func = S_clockinfo;
 859                         else if (strcmp(fmt, "S,timespec") == 0)
 860                                 func = S_timespec;
 861                         else if (strcmp(fmt, "S,timeval") == 0)
 862                                 func = S_timeval;
 863                         else if (strcmp(fmt, "S,loadavg") == 0)
 864                                 func = S_loadavg;
 865                         else if (strcmp(fmt, "S,sensor") == 0)
 866                                 func = S_sensor;
 867 #ifdef __x86_64__
 868                         else if (strcmp(fmt, "S,efi_map_header") == 0)
 869                                 func = S_efi_map;
 870 #endif
 871                         else if (strcmp(fmt, "T,dev_t") == 0)
 872                                 func = T_dev_t;
 873                         else if (strcmp(fmt, "T,udev_t") == 0)
 874                                 func = T_dev_t;
 875                         else
 876                                 func = NULL;
 877                         if (func) {
 878                                 if (!nflag)
 879                                         printf("%s%s", name, sep);
 880                                 error = (*func)(len, p);
 881                                 goto done;
 882                         }
 883                 }
 884                 /* FALL THROUGH */
 885         default:
 886                 if (!oflag && !xflag) {
 887                         error = 1;
 888                         goto done;
 889                 }
 890                 if (!nflag)
 891                         printf("%s%s", name, sep);
 892                 printf("Format:%s Length:%zu Dump:0x", fmt, len);
 893                 while (len-- && (xflag || p < val + 16))
 894                         printf("%02x", *p++);
 895                 if (!xflag && len > 16)
 896                         printf("...");
 897                 goto done;
 898         }
 899
 900 done:
 901         if (val != NULL)
 902                 free(val);
 903         return (error);
 904 }
 905
 906 static int
 907 sysctl_all(int *oid, size_t len)
 908 {
 909         int name1[22], name2[22];
 910         int retval;
 911         size_t i, l1, l2;
 912
 913         name1[0] = 0;
 914         name1[1] = 2;
 915         l1 = 2;
 916         if (len) {
 917                 memcpy(name1+2, oid, len * sizeof(int));
 918                 l1 += len;
 919         } else {
 920                 name1[2] = 1;
 921                 l1++;
 922         }
 923         for (;;) {
 924                 l2 = sizeof(name2);
 925                 retval = sysctl(name1, l1, name2, &l2, 0, 0);
 926                 if (retval < 0) {
 927                         if (errno == ENOENT)
 928                                 return 0;
 929                         else
 930                                 err(1, "sysctl(getnext) %d %zu", retval, l2);
 931                 }
 932
 933                 l2 /= sizeof(int);
 934
 935                 if (l2 < len)
 936                         return 0;
 937
 938                 for (i = 0; i < len; i++)
 939                         if (name2[i] != oid[i])
 940                                 return 0;
 941
 942                 retval = show_var(name2, l2);
 943                 if (retval == 0 && !bflag)
 944                         putchar('\n');
 945
 946                 memcpy(name1+2, name2, l2 * sizeof(int));
 947                 l1 = 2 + l2;
 948         }
 949 }