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 <ctype.h>
  47 #include <err.h>
  48 #include <errno.h>
  49 #include <inttypes.h>
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <string.h>
  53 #include <unistd.h>
  54
  55 static int      aflag, bflag, dflag, eflag, Nflag, nflag, oflag, xflag;
  56 static int      iflag, qflag;
  57
  58 static int      oidfmt(int *, size_t, char *, u_int *);
  59 static int      parse(const char *);
  60 static int      show_var(int *, size_t);
  61 static int      sysctl_all(int *, size_t);
  62 static void     set_T_dev_t(const char *, void **, size_t *);
  63 static int      set_IK(const char *, int *);
  64
  65 static void
  66 usage(void)
  67 {
  68
  69         fprintf(stderr, "%s\n%s\n",
  70             "usage: sysctl [-bdeNnox] variable[=value] ...",
  71             "       sysctl [-bdeNnox] -a");
  72         exit(1);
  73 }
  74
  75 int
  76 main(int argc, char **argv)
  77 {
  78         int ch;
  79         int warncount;
  80
  81         setbuf(stdout,0);
  82         setbuf(stderr,0);
  83
  84         while ((ch = getopt(argc, argv, "AabdeiNnoqwxX")) != -1) {
  85                 switch (ch) {
  86                 case 'A':
  87                         /* compatibility */
  88                         aflag = oflag = 1;
  89                         break;
  90                 case 'a':
  91                         aflag = 1;
  92                         break;
  93                 case 'b':
  94                         bflag = 1;
  95                         break;
  96                 case 'd':
  97                         dflag = 1;
  98                         break;
  99                 case 'e':
 100                         eflag = 1;
 101                         break;
 102                 case 'i':
 103                         iflag = 1;
 104                         break;
 105                 case 'N':
 106                         Nflag = 1;
 107                         break;
 108                 case 'n':
 109                         nflag = 1;
 110                         break;
 111                 case 'o':
 112                         oflag = 1;
 113                         break;
 114                 case 'q':
 115                         qflag = 1;
 116                         break;
 117                 case 'w':
 118                         /* compatibility */
 119                         /* ignored */
 120                         break;
 121                 case 'X':
 122                         /* compatibility */
 123                         aflag = xflag = 1;
 124                         break;
 125                 case 'x':
 126                         xflag = 1;
 127                         break;
 128                 default:
 129                         usage();
 130                 }
 131         }
 132         argc -= optind;
 133         argv += optind;
 134
 135         if (Nflag && nflag)
 136                 usage();
 137         if (aflag && argc == 0)
 138                 exit(sysctl_all(0, 0));
 139         if (argc == 0)
 140                 usage();
 141         warncount = 0;
 142         while (argc-- > 0)
 143                 warncount += parse(*argv++);
 144
 145         return warncount;
 146 }
 147
 148 /*
 149  * Parse a name into a MIB entry.
 150  * Lookup and print out the MIB entry if it exists.
 151  * Set a new value if requested.
 152  */
 153 static int
 154 parse(const char *string)
 155 {
 156         size_t len;
 157         int i, j;
 158         void *newval = NULL;
 159         int8_t i8val;
 160         uint8_t u8val;
 161         int16_t i16val;
 162         uint16_t u16val;
 163         int32_t i32val;
 164         uint32_t u32val;
 165         int64_t i64val;
 166         uint64_t u64val;
 167         int intval;
 168         unsigned int uintval;
 169         long longval;
 170         unsigned long ulongval;
 171         size_t newsize = 0;
 172         int mib[CTL_MAXNAME];
 173         char *cp, fmt[BUFSIZ];
 174         const char *name;
 175         char *name_allocated = NULL;
 176         u_int kind;
 177
 178         if ((cp = strchr(string, '=')) != NULL) {
 179                 if ((name_allocated = malloc(cp - string + 1)) == NULL)
 180                         err(1, "malloc failed");
 181                 strlcpy(name_allocated, string, cp - string + 1);
 182                 name = name_allocated;
 183
 184                 while (isspace(*++cp))
 185                         ;
 186
 187                 newval = cp;
 188                 newsize = strlen(cp);
 189         } else {
 190                 name = string;
 191         }
 192
 193         len = CTL_MAXNAME;
 194         if (sysctlnametomib(name, mib, &len) < 0) {
 195                 if (iflag)
 196                         return 0;
 197                 if (qflag)
 198                         return 1;
 199                 if (errno == ENOENT) {
 200                         errx(1, "unknown oid '%s'", name);
 201                 } else {
 202                         err(1, "sysctlnametomib(\"%s\")", name);
 203                 }
 204         }
 205
 206         if (oidfmt(mib, len, fmt, &kind)) {
 207                 warn("couldn't find format of oid '%s'", name);
 208                 if (iflag)
 209                         return 1;
 210                 exit(1);
 211         }
 212
 213         if (newval == NULL) {
 214                 if ((kind & CTLTYPE) == CTLTYPE_NODE) {
 215                         sysctl_all(mib, len);
 216                 } else {
 217                         i = show_var(mib, len);
 218                         if (!i && !bflag)
 219                                 putchar('\n');
 220                 }
 221         } else {
 222                 if ((kind & CTLTYPE) == CTLTYPE_NODE)
 223                         errx(1, "oid '%s' isn't a leaf node", name);
 224
 225                 if (!(kind&CTLFLAG_WR))
 226                         errx(1, "oid '%s' is read only", name);
 227
 228                 switch (kind & CTLTYPE) {
 229                         case CTLTYPE_INT:
 230                                 if (!(strcmp(fmt, "IK") == 0)) {
 231                                         if (!set_IK(newval, &intval))
 232                                                 errx(1, "invalid value '%s'",
 233                                                     (char *)newval);
 234                                 } else
 235                                         intval = (int) strtol(newval, NULL, 0);
 236                                 newval = &intval;
 237                                 newsize = sizeof(intval);
 238                                 break;
 239                         case CTLTYPE_UINT:
 240                                 uintval = (int) strtoul(newval, NULL, 0);
 241                                 newval = &uintval;
 242                                 newsize = sizeof uintval;
 243                                 break;
 244                         case CTLTYPE_LONG:
 245                                 longval = strtol(newval, NULL, 0);
 246                                 newval = &longval;
 247                                 newsize = sizeof longval;
 248                                 break;
 249                         case CTLTYPE_ULONG:
 250                                 ulongval = strtoul(newval, NULL, 0);
 251                                 newval = &ulongval;
 252                                 newsize = sizeof ulongval;
 253                                 break;
 254                         case CTLTYPE_STRING:
 255                                 break;
 256                         case CTLTYPE_S8:
 257                                 i8val = (int8_t)strtol(newval, NULL, 0);
 258                                 newval = &i8val;
 259                                 newsize = sizeof(i8val);
 260                                 break;
 261                         case CTLTYPE_S16:
 262                                 i16val = (int16_t)strtol(newval, NULL, 0);
 263                                 newval = &i16val;
 264                                 newsize = sizeof(i16val);
 265                                 break;
 266                         case CTLTYPE_S32:
 267                                 i32val = (int32_t)strtol(newval, NULL, 0);
 268                                 newval = &i32val;
 269                                 newsize = sizeof(i32val);
 270                                 break;
 271                         case CTLTYPE_S64:
 272                                 i64val = strtoimax(newval, NULL, 0);
 273                                 newval = &i64val;
 274                                 newsize = sizeof(i64val);
 275                                 break;
 276                         case CTLTYPE_U8:
 277                                 u8val = (uint8_t)strtoul(newval, NULL, 0);
 278                                 newval = &u8val;
 279                                 newsize = sizeof(u8val);
 280                                 break;
 281                         case CTLTYPE_U16:
 282                                 u16val = (uint16_t)strtoul(newval, NULL, 0);
 283                                 newval = &u16val;
 284                                 newsize = sizeof(u16val);
 285                                 break;
 286                         case CTLTYPE_U32:
 287                                 u32val = (uint32_t)strtoul(newval, NULL, 0);
 288                                 newval = &u32val;
 289                                 newsize = sizeof(u32val);
 290                                 break;
 291                         case CTLTYPE_U64:
 292                                 u64val = strtoumax(newval, NULL, 0);
 293                                 newval = &u64val;
 294                                 newsize = sizeof(u64val);
 295                                 break;
 296                         case CTLTYPE_OPAQUE:
 297                                 if (strcmp(fmt, "T,dev_t") == 0 ||
 298                                     strcmp(fmt, "T,udev_t") == 0
 299                                 ) {
 300                                         set_T_dev_t((char*)newval, &newval,
 301                                                     &newsize);
 302                                         break;
 303                                 }
 304                                 /* FALLTHROUGH */
 305                         default:
 306                                 errx(1, "oid '%s' is type %d,"
 307                                         " cannot set that", name,
 308                                         kind & CTLTYPE);
 309                 }
 310
 311                 i = show_var(mib, len);
 312                 if (sysctl(mib, len, 0, 0, newval, newsize) == -1) {
 313                         if (!i && !bflag)
 314                                 putchar('\n');
 315                         switch (errno) {
 316                         case EOPNOTSUPP:
 317                                 errx(1, "%s: value is not available",
 318                                         string);
 319                         case ENOTDIR:
 320                                 errx(1, "%s: specification is incomplete",
 321                                         string);
 322                         case ENOMEM:
 323                                 errx(1, "%s: type is unknown to this program",
 324                                         string);
 325                         default:
 326                                 warn("%s", string);
 327                                 return 1;
 328                         }
 329                 }
 330                 if (!bflag)
 331                         printf(" -> ");
 332                 i = nflag;
 333                 nflag = 1;
 334                 j = show_var(mib, len);
 335                 if (!j && !bflag)
 336                         putchar('\n');
 337                 nflag = i;
 338         }
 339
 340         if (name_allocated != NULL)
 341                 free(name_allocated);
 342
 343         return 0;
 344 }
 345
 346 /* These functions will dump out various interesting structures. */
 347
 348 static int
 349 S_clockinfo(size_t l2, void *p)
 350 {
 351         struct clockinfo *ci = (struct clockinfo*)p;
 352         if (l2 != sizeof(*ci))
 353                 err(1, "S_clockinfo %zu != %zu", l2, sizeof(*ci));
 354         printf("{ hz = %d, tick = %d, tickadj = %d, profhz = %d, stathz = %d }",
 355                 ci->hz, ci->tick, ci->tickadj, ci->profhz, ci->stathz);
 356         return (0);
 357 }
 358
 359 static int
 360 S_loadavg(size_t l2, void *p)
 361 {
 362         struct loadavg *tv = (struct loadavg*)p;
 363
 364         if (l2 != sizeof(*tv))
 365                 err(1, "S_loadavg %zu != %zu", l2, sizeof(*tv));
 366
 367         printf("{ %.2f %.2f %.2f }",
 368                 (double)tv->ldavg[0]/(double)tv->fscale,
 369                 (double)tv->ldavg[1]/(double)tv->fscale,
 370                 (double)tv->ldavg[2]/(double)tv->fscale);
 371         return (0);
 372 }
 373
 374 static int
 375 S_timespec(size_t l2, void *p)
 376 {
 377         struct timespec *ts = (struct timespec*)p;
 378         time_t tv_sec;
 379         char *p1, *p2;
 380
 381         if (l2 != sizeof(*ts))
 382                 err(1, "S_timespec %zu != %zu", l2, sizeof(*ts));
 383         printf("{ sec = %ld, nsec = %ld } ",
 384                 ts->tv_sec, ts->tv_nsec);
 385         tv_sec = ts->tv_sec;
 386         p1 = strdup(ctime(&tv_sec));
 387         for (p2=p1; *p2 ; p2++)
 388                 if (*p2 == '\n')
 389                         *p2 = '\0';
 390         fputs(p1, stdout);
 391         return (0);
 392 }
 393
 394 static int
 395 S_timeval(size_t l2, void *p)
 396 {
 397         struct timeval *tv = (struct timeval*)p;
 398         time_t tv_sec;
 399         char *p1, *p2;
 400
 401         if (l2 != sizeof(*tv))
 402                 err(1, "S_timeval %zu != %zu", l2, sizeof(*tv));
 403         printf("{ sec = %ld, usec = %ld } ",
 404                 tv->tv_sec, tv->tv_usec);
 405         tv_sec = tv->tv_sec;
 406         p1 = strdup(ctime(&tv_sec));
 407         for (p2=p1; *p2 ; p2++)
 408                 if (*p2 == '\n')
 409                         *p2 = '\0';
 410         fputs(p1, stdout);
 411         return (0);
 412 }
 413
 414 static int
 415 S_sensor(size_t l2, void *p)
 416 {
 417         struct sensor *s = (struct sensor *)p;
 418
 419         if (l2 != sizeof(*s)) {
 420                 warnx("S_sensor %zu != %zu", l2, sizeof(*s));
 421                 return (1);
 422         }
 423
 424         if (s->flags & SENSOR_FINVALID) {
 425                 /*
 426                  * XXX: with this flag, the node should be entirely ignored,
 427                  * but as the magic-based sysctl(8) is not too flexible, we
 428                  * simply have to print out that the sensor is invalid.
 429                  */
 430                 printf("invalid");
 431                 return (0);
 432         }
 433
 434         if (s->flags & SENSOR_FUNKNOWN)
 435                 printf("unknown");
 436         else {
 437                 switch (s->type) {
 438                 case SENSOR_TEMP:
 439                         printf("%.2f degC",
 440                             (s->value - 273150000) / 1000000.0);
 441                         break;
 442                 case SENSOR_FANRPM:
 443                         printf("%jd RPM", (intmax_t)s->value);
 444                         break;
 445                 case SENSOR_VOLTS_DC:
 446                         printf("%.2f VDC", s->value / 1000000.0);
 447                         break;
 448                 case SENSOR_WATTS:
 449                         printf("%.2f W", s->value / 1000000.0);
 450                         break;
 451                 case SENSOR_AMPS:
 452                         printf("%.2f A", s->value / 1000000.0);
 453                         break;
 454                 case SENSOR_WATTHOUR:
 455                         printf("%.2f Wh", s->value / 1000000.0);
 456                         break;
 457                 case SENSOR_AMPHOUR:
 458                         printf("%.2f Ah", s->value / 1000000.0);
 459                         break;
 460                 case SENSOR_INDICATOR:
 461                         printf("%s", s->value ? "On" : "Off");
 462                         break;
 463                 case SENSOR_FREQ:
 464                         printf("%jd Hz", (intmax_t)s->value);
 465                         break;
 466                 case SENSOR_ECC:
 467                 case SENSOR_INTEGER:
 468                         printf("%jd", (intmax_t)s->value);
 469                         break;
 470                 case SENSOR_PERCENT:
 471                         printf("%.2f%%", s->value / 1000.0);
 472                         break;
 473                 case SENSOR_LUX:
 474                         printf("%.2f lx", s->value / 1000000.0);
 475                         break;
 476                 case SENSOR_DRIVE:
 477                 {
 478                         const char *name;
 479
 480                         switch (s->value) {
 481                         case SENSOR_DRIVE_EMPTY:
 482                                 name = "empty";
 483                                 break;
 484                         case SENSOR_DRIVE_READY:
 485                                 name = "ready";
 486                                 break;
 487                         case SENSOR_DRIVE_POWERUP:
 488                                 name = "powering up";
 489                                 break;
 490                         case SENSOR_DRIVE_ONLINE:
 491                                 name = "online";
 492                                 break;
 493                         case SENSOR_DRIVE_IDLE:
 494                                 name = "idle";
 495                                 break;
 496                         case SENSOR_DRIVE_ACTIVE:
 497                                 name = "active";
 498                                 break;
 499                         case SENSOR_DRIVE_REBUILD:
 500                                 name = "rebuilding";
 501                                 break;
 502                         case SENSOR_DRIVE_POWERDOWN:
 503                                 name = "powering down";
 504                                 break;
 505                         case SENSOR_DRIVE_FAIL:
 506                                 name = "failed";
 507                                 break;
 508                         case SENSOR_DRIVE_PFAIL:
 509                                 name = "degraded";
 510                                 break;
 511                         default:
 512                                 name = "unknown";
 513                                 break;
 514                         }
 515                         printf("%s", name);
 516                         break;
 517                 }
 518                 case SENSOR_TIMEDELTA:
 519                         printf("%.6f secs", s->value / 1000000000.0);
 520                         break;
 521                 default:
 522                         printf("unknown");
 523                 }
 524         }
 525
 526         if (s->desc[0] != '\0')
 527                 printf(" (%s)", s->desc);
 528
 529         switch (s->status) {
 530         case SENSOR_S_UNSPEC:
 531                 break;
 532         case SENSOR_S_OK:
 533                 printf(", OK");
 534                 break;
 535         case SENSOR_S_WARN:
 536                 printf(", WARNING");
 537                 break;
 538         case SENSOR_S_CRIT:
 539                 printf(", CRITICAL");
 540                 break;
 541         case SENSOR_S_UNKNOWN:
 542                 printf(", UNKNOWN");
 543                 break;
 544         }
 545
 546         if (s->tv.tv_sec) {
 547                 time_t t = s->tv.tv_sec;
 548                 char ct[26];
 549
 550                 ctime_r(&t, ct);
 551                 ct[19] = '\0';
 552                 printf(", %s.%03ld", ct, s->tv.tv_usec / 1000);
 553         }
 554
 555         return (0);
 556 }
 557
 558 #ifdef __x86_64__
 559 static int
 560 S_efi_map(size_t l2, void *p)
 561 {
 562         struct efi_map_header *efihdr;
 563         struct efi_md *map;
 564         const char *type;
 565         size_t efisz;
 566         int ndesc, i;
 567
 568         static const char *types[] = {
 569                 "Reserved",
 570                 "LoaderCode",
 571                 "LoaderData",
 572                 "BootServicesCode",
 573                 "BootServicesData",
 574                 "RuntimeServicesCode",
 575                 "RuntimeServicesData",
 576                 "ConventionalMemory",
 577                 "UnusableMemory",
 578                 "ACPIReclaimMemory",
 579                 "ACPIMemoryNVS",
 580                 "MemoryMappedIO",
 581                 "MemoryMappedIOPortSpace",
 582                 "PalCode"
 583         };
 584
 585         /*
 586          * Memory map data provided by UEFI via the GetMemoryMap
 587          * Boot Services API.
 588          */
 589         if (l2 < sizeof(*efihdr)) {
 590                 warnx("S_efi_map length less than header");
 591                 return (1);
 592         }
 593         efihdr = p;
 594         efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
 595         map = (struct efi_md *)((uint8_t *)efihdr + efisz);
 596
 597         if (efihdr->descriptor_size == 0)
 598                 return (0);
 599         if (l2 != efisz + efihdr->memory_size) {
 600                 warnx("S_efi_map length mismatch %zu vs %zu", l2, efisz +
 601                     efihdr->memory_size);
 602                 return (1);
 603         }
 604         ndesc = efihdr->memory_size / efihdr->descriptor_size;
 605
 606         printf("\n%23s %12s %12s %8s %4s",
 607             "Type", "Physical", "Virtual", "#Pages", "Attr");
 608
 609         for (i = 0; i < ndesc; i++,
 610             map = efi_next_descriptor(map, efihdr->descriptor_size)) {
 611                 if (map->md_type <= EFI_MD_TYPE_PALCODE)
 612                         type = types[map->md_type];
 613                 else
 614                         type = "<INVALID>";
 615                 printf("\n%23s %012lx %12p %08lx ", type, map->md_phys,
 616                     map->md_virt, map->md_pages);
 617                 if (map->md_attr & EFI_MD_ATTR_UC)
 618                         printf("UC ");
 619                 if (map->md_attr & EFI_MD_ATTR_WC)
 620                         printf("WC ");
 621                 if (map->md_attr & EFI_MD_ATTR_WT)
 622                         printf("WT ");
 623                 if (map->md_attr & EFI_MD_ATTR_WB)
 624                         printf("WB ");
 625                 if (map->md_attr & EFI_MD_ATTR_UCE)
 626                         printf("UCE ");
 627                 if (map->md_attr & EFI_MD_ATTR_WP)
 628                         printf("WP ");
 629                 if (map->md_attr & EFI_MD_ATTR_RP)
 630                         printf("RP ");
 631                 if (map->md_attr & EFI_MD_ATTR_XP)
 632                         printf("XP ");
 633                 if (map->md_attr & EFI_MD_ATTR_RT)
 634                         printf("RUNTIME");
 635         }
 636         return (0);
 637 }
 638 #endif
 639
 640 static int
 641 T_dev_t(size_t l2, void *p)
 642 {
 643         dev_t *d = (dev_t *)p;
 644         if (l2 != sizeof(*d))
 645                 err(1, "T_dev_T %zu != %zu", l2, sizeof(*d));
 646         if ((int)(*d) != -1) {
 647                 if (minor(*d) > 255 || minor(*d) < 0)
 648                         printf("{ major = %d, minor = 0x%x }",
 649                                 major(*d), minor(*d));
 650                 else
 651                         printf("{ major = %d, minor = %d }",
 652                                 major(*d), minor(*d));
 653         }
 654         return (0);
 655 }
 656
 657 static void
 658 set_T_dev_t(const char *path, void **val, size_t *size)
 659 {
 660         static struct stat statb;
 661
 662         if (strcmp(path, "none") && strcmp(path, "off")) {
 663                 int rc = stat (path, &statb);
 664                 if (rc) {
 665                         err(1, "cannot stat %s", path);
 666                 }
 667
 668                 if (!S_ISCHR(statb.st_mode)) {
 669                         errx(1, "must specify a device special file.");
 670                 }
 671         } else {
 672                 statb.st_rdev = NODEV;
 673         }
 674         *val = (char*) &statb.st_rdev;
 675         *size = sizeof statb.st_rdev;
 676 }
 677
 678 static int
 679 set_IK(const char *str, int *val)
 680 {
 681         float temp;
 682         int len, kelv;
 683         const char *p;
 684         char *endptr;
 685
 686         if ((len = strlen(str)) == 0)
 687                 return (0);
 688         p = &str[len - 1];
 689         if (*p == 'C' || *p == 'F') {
 690                 temp = strtof(str, &endptr);
 691                 if (endptr == str || endptr != p)
 692                         return 0;
 693                 if (*p == 'F')
 694                         temp = (temp - 32) * 5 / 9;
 695                 kelv = temp * 10 + 2732;
 696         } else {
 697                 /*
 698                  * I would like to just use, 0 but it would make numbers
 699                  * like '023' which were interpreted as decimal before
 700                  * suddenly interpreted as octal.
 701                  */
 702                 if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
 703                         kelv = (int)strtol(str, &endptr, 0);
 704                 else
 705                         kelv = (int)strtol(str, &endptr, 10);
 706                 if (endptr == str || *endptr != '\0')
 707                         return 0;
 708         }
 709         *val = kelv;
 710         return 1;
 711 }
 712
 713 /*
 714  * These functions uses a presently undocumented interface to the kernel
 715  * to walk the tree and get the type so it can print the value.
 716  * This interface is under work and consideration, and should probably
 717  * be killed with a big axe by the first person who can find the time.
 718  * (be aware though, that the proper interface isn't as obvious as it
 719  * may seem, there are various conflicting requirements.
 720  */
 721
 722 static int
 723 oidfmt(int *oid, size_t len, char *fmt, u_int *kind)
 724 {
 725         int qoid[CTL_MAXNAME+2];
 726         u_char buf[BUFSIZ];
 727         int i;
 728         size_t j;
 729
 730         qoid[0] = 0;
 731         qoid[1] = 4;
 732         memcpy(qoid + 2, oid, len * sizeof(int));
 733
 734         j = sizeof(buf);
 735         i = sysctl(qoid, len + 2, buf, &j, 0, 0);
 736         if (i)
 737                 err(1, "sysctl fmt %d %zu %d", i, j, errno);
 738
 739         if (kind)
 740                 *kind = *(u_int *)buf;
 741
 742         if (fmt)
 743                 strcpy(fmt, (char *)(buf + sizeof(u_int)));
 744         return 0;
 745 }
 746
 747 /*
 748  * This formats and outputs the value of one variable
 749  *
 750  * Returns zero if anything was actually output.
 751  * Returns one if didn't know what to do with this.
 752  * Return minus one if we had errors.
 753  */
 754
 755 static int
 756 show_var(int *oid, size_t nlen)
 757 {
 758         u_char buf[BUFSIZ], *val = NULL, *p, *nul;
 759         char name[BUFSIZ], *fmt;
 760         const char *sep, *spacer;
 761         int qoid[CTL_MAXNAME+2];
 762         int i;
 763         size_t j, len;
 764         u_int kind;
 765         int (*func)(size_t, void *);
 766         int error = 0;
 767
 768         qoid[0] = 0;
 769         memcpy(qoid + 2, oid, nlen * sizeof(int));
 770
 771         qoid[1] = 1;
 772         j = sizeof(name);
 773         i = sysctl(qoid, nlen + 2, name, &j, 0, 0);
 774         if (i || !j)
 775                 err(1, "sysctl name %d %zu %d", i, j, errno);
 776
 777         if (Nflag) {
 778                 printf("%s", name);
 779                 return (0);
 780         }
 781
 782         if (eflag)
 783                 sep = "=";
 784         else
 785                 sep = ": ";
 786
 787         if (dflag) {    /* just print description */
 788                 qoid[1] = 5;
 789                 j = sizeof(buf);
 790                 i = sysctl(qoid, nlen + 2, buf, &j, 0, 0);
 791                 if (!nflag)
 792                         printf("%s%s", name, sep);
 793                 printf("%s", buf);
 794                 return(0);
 795         }
 796         /* find an estimate of how much we need for this var */
 797         j = 0;
 798         i = sysctl(oid, nlen, 0, &j, 0, 0);
 799         j += j; /* we want to be sure :-) */
 800
 801         val = malloc(j + 1);
 802         if (val == NULL)
 803                 return (1);
 804
 805         len = j;
 806         i = sysctl(oid, nlen, val, &len, 0, 0);
 807         if (i || !len) {
 808                 error = 1;
 809                 goto done;
 810         }
 811
 812         if (bflag) {
 813                 fwrite(val, 1, len, stdout);
 814                 goto done;
 815         }
 816
 817         val[len] = '\0';
 818         fmt = buf;
 819         oidfmt(oid, nlen, fmt, &kind);
 820         p = val;
 821         switch (*fmt) {
 822         case 'A':
 823                 if (!nflag)
 824                         printf("%s%s", name, sep);
 825                 nul = memchr(p, '\0', len);
 826                 fwrite(p, nul == NULL ? (int)len : nul - p, 1, stdout);
 827                 return (0);
 828
 829         case 'C':
 830                 if (!nflag)
 831                         printf("%s%s", name, sep);
 832                 fmt++;
 833                 spacer = "";
 834                 while (len >= sizeof(char)) {
 835                         if(*fmt == 'U')
 836                                 printf("%s%hhu", spacer, *(unsigned char *)p);
 837                         else
 838                                 printf("%s%hhd", spacer, *(char *)p);
 839                         spacer = " ";
 840                         len -= sizeof(char);
 841                         p += sizeof(char);
 842                 }
 843                 goto done;
 844
 845         case 'I':
 846                 if (!nflag)
 847                         printf("%s%s", name, sep);
 848                 fmt++;
 849                 spacer = "";
 850                 while (len >= sizeof(int)) {
 851                         if(*fmt == 'U')
 852                                 printf("%s%u", spacer, *(unsigned int *)p);
 853                         else if (*fmt == 'K' && *(int *)p >= 0)
 854                                 printf("%s%.1fC", spacer, (*(int *)p - 2732) / 10.0);
 855                         else
 856                                 printf("%s%d", spacer, *(int *)p);
 857                         spacer = " ";
 858                         len -= sizeof(int);
 859                         p += sizeof(int);
 860                 }
 861                 goto done;
 862
 863         case 'L':
 864                 if (!nflag)
 865                         printf("%s%s", name, sep);
 866                 fmt++;
 867                 spacer = "";
 868                 while (len >= sizeof(long)) {
 869                         if(*fmt == 'U')
 870                                 printf("%s%lu", spacer, *(unsigned long *)p);
 871                         else
 872                                 printf("%s%ld", spacer, *(long *)p);
 873                         spacer = " ";
 874                         len -= sizeof(long);
 875                         p += sizeof(long);
 876                 }
 877                 goto done;
 878
 879         case 'P':
 880                 if (!nflag)
 881                         printf("%s%s", name, sep);
 882                 printf("%p", *(void **)p);
 883                 goto done;
 884
 885         case 'Q':
 886                 if (!nflag)
 887                         printf("%s%s", name, sep);
 888                 fmt++;
 889                 spacer = "";
 890                 while (len >= sizeof(quad_t)) {
 891                         if(*fmt == 'U') {
 892                                 printf("%s%ju",
 893                                        spacer, (uintmax_t)*(u_quad_t *)p);
 894                         } else {
 895                                 printf("%s%jd",
 896                                        spacer, (intmax_t)*(quad_t *)p);
 897                         }
 898                         spacer = " ";
 899                         len -= sizeof(int64_t);
 900                         p += sizeof(int64_t);
 901                 }
 902                 goto done;
 903
 904         case 'T':
 905         case 'S':
 906                 if (fmt[0] == 'S' && fmt[1] != ',') {
 907                         if (!nflag)
 908                                 printf("%s%s", name, sep);
 909                         fmt++;
 910                         spacer = "";
 911                         while (len >= sizeof(short)) {
 912                                 if(*fmt == 'U')
 913                                         printf("%s%hu", spacer,
 914                                             *(unsigned short *)p);
 915                                 else
 916                                         printf("%s%hd", spacer, *(short *)p);
 917                                 spacer = " ";
 918                                 len -= sizeof(short);
 919                                 p += sizeof(short);
 920                         }
 921                         goto done;
 922                 }
 923
 924                 if (!oflag && !xflag) {
 925                         i = 0;
 926                         if (strcmp(fmt, "S,clockinfo") == 0)
 927                                 func = S_clockinfo;
 928                         else if (strcmp(fmt, "S,timespec") == 0)
 929                                 func = S_timespec;
 930                         else if (strcmp(fmt, "S,timeval") == 0)
 931                                 func = S_timeval;
 932                         else if (strcmp(fmt, "S,loadavg") == 0)
 933                                 func = S_loadavg;
 934                         else if (strcmp(fmt, "S,sensor") == 0)
 935                                 func = S_sensor;
 936 #ifdef __x86_64__
 937                         else if (strcmp(fmt, "S,efi_map_header") == 0)
 938                                 func = S_efi_map;
 939 #endif
 940                         else if (strcmp(fmt, "T,dev_t") == 0)
 941                                 func = T_dev_t;
 942                         else if (strcmp(fmt, "T,udev_t") == 0)
 943                                 func = T_dev_t;
 944                         else
 945                                 func = NULL;
 946                         if (func) {
 947                                 if (!nflag)
 948                                         printf("%s%s", name, sep);
 949                                 error = (*func)(len, p);
 950                                 goto done;
 951                         }
 952                 }
 953                 /* FALL THROUGH */
 954         default:
 955                 if (!oflag && !xflag) {
 956                         error = 1;
 957                         goto done;
 958                 }
 959                 if (!nflag)
 960                         printf("%s%s", name, sep);
 961                 printf("Format:%s Length:%zu Dump:0x", fmt, len);
 962                 while (len-- && (xflag || p < val + 16))
 963                         printf("%02x", *p++);
 964                 if (!xflag && len > 16)
 965                         printf("...");
 966                 goto done;
 967         }
 968
 969 done:
 970         if (val != NULL)
 971                 free(val);
 972         return (error);
 973 }
 974
 975 static int
 976 sysctl_all(int *oid, size_t len)
 977 {
 978         int name1[22], name2[22];
 979         int retval;
 980         size_t i, l1, l2;
 981
 982         name1[0] = 0;
 983         name1[1] = 2;
 984         l1 = 2;
 985         if (len) {
 986                 memcpy(name1+2, oid, len * sizeof(int));
 987                 l1 += len;
 988         } else {
 989                 name1[2] = 1;
 990                 l1++;
 991         }
 992         for (;;) {
 993                 l2 = sizeof(name2);
 994                 retval = sysctl(name1, l1, name2, &l2, 0, 0);
 995                 if (retval < 0) {
 996                         if (errno == ENOENT)
 997                                 return 0;
 998                         else
 999                                 err(1, "sysctl(getnext) %d %zu", retval, l2);
1000                 }
1001
1002                 l2 /= sizeof(int);
1003
1004                 if (l2 < len)
1005                         return 0;
1006
1007                 for (i = 0; i < len; i++)
1008                         if (name2[i] != oid[i])
1009                                 return 0;
1010
1011                 retval = show_var(name2, l2);
1012                 if (retval == 0 && !bflag)
1013                         putchar('\n');
1014
1015                 memcpy(name1+2, name2, l2 * sizeof(int));
1016                 l1 = 2 + l2;
1017         }
1018 }