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 [-AbdeiNnoqwxX] variable[=value] ...",
  71             "       sysctl [-bdeiNnoqwxX] -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                         case CTLTYPE_BIT32(0):
 231                         case CTLTYPE_BIT64(0):
 232                                 if (!(strcmp(fmt, "IK") == 0)) {
 233                                         if (!set_IK(newval, &intval))
 234                                                 errx(1, "invalid value '%s'",
 235                                                     (char *)newval);
 236                                 } else {
 237                                         intval = (int) strtol(newval, NULL, 0);
 238                                 }
 239                                 newval = &intval;
 240                                 newsize = sizeof(intval);
 241                                 break;
 242                         case CTLTYPE_UINT:
 243                                 uintval = (int) strtoul(newval, NULL, 0);
 244                                 newval = &uintval;
 245                                 newsize = sizeof uintval;
 246                                 break;
 247                         case CTLTYPE_LONG:
 248                                 longval = strtol(newval, NULL, 0);
 249                                 newval = &longval;
 250                                 newsize = sizeof longval;
 251                                 break;
 252                         case CTLTYPE_ULONG:
 253                                 ulongval = strtoul(newval, NULL, 0);
 254                                 newval = &ulongval;
 255                                 newsize = sizeof ulongval;
 256                                 break;
 257                         case CTLTYPE_STRING:
 258                                 break;
 259                         case CTLTYPE_S8:
 260                                 i8val = (int8_t)strtol(newval, NULL, 0);
 261                                 newval = &i8val;
 262                                 newsize = sizeof(i8val);
 263                                 break;
 264                         case CTLTYPE_S16:
 265                                 i16val = (int16_t)strtol(newval, NULL, 0);
 266                                 newval = &i16val;
 267                                 newsize = sizeof(i16val);
 268                                 break;
 269                         case CTLTYPE_S32:
 270                                 i32val = (int32_t)strtol(newval, NULL, 0);
 271                                 newval = &i32val;
 272                                 newsize = sizeof(i32val);
 273                                 break;
 274                         case CTLTYPE_S64:
 275                                 i64val = strtoimax(newval, NULL, 0);
 276                                 newval = &i64val;
 277                                 newsize = sizeof(i64val);
 278                                 break;
 279                         case CTLTYPE_U8:
 280                                 u8val = (uint8_t)strtoul(newval, NULL, 0);
 281                                 newval = &u8val;
 282                                 newsize = sizeof(u8val);
 283                                 break;
 284                         case CTLTYPE_U16:
 285                                 u16val = (uint16_t)strtoul(newval, NULL, 0);
 286                                 newval = &u16val;
 287                                 newsize = sizeof(u16val);
 288                                 break;
 289                         case CTLTYPE_U32:
 290                                 u32val = (uint32_t)strtoul(newval, NULL, 0);
 291                                 newval = &u32val;
 292                                 newsize = sizeof(u32val);
 293                                 break;
 294                         case CTLTYPE_U64:
 295                                 u64val = strtoumax(newval, NULL, 0);
 296                                 newval = &u64val;
 297                                 newsize = sizeof(u64val);
 298                                 break;
 299                         case CTLTYPE_OPAQUE:
 300                                 if (strcmp(fmt, "T,dev_t") == 0 ||
 301                                     strcmp(fmt, "T,udev_t") == 0
 302                                 ) {
 303                                         set_T_dev_t((char*)newval, &newval,
 304                                                     &newsize);
 305                                         break;
 306                                 }
 307                                 /* FALLTHROUGH */
 308                         default:
 309                                 errx(1, "oid '%s' is type %d,"
 310                                         " cannot set that", name,
 311                                         kind & CTLTYPE);
 312                 }
 313
 314                 i = show_var(mib, len);
 315                 if (sysctl(mib, len, 0, 0, newval, newsize) == -1) {
 316                         if (!i && !bflag)
 317                                 putchar('\n');
 318                         switch (errno) {
 319                         case EOPNOTSUPP:
 320                                 errx(1, "%s: value is not available",
 321                                         string);
 322                         case ENOTDIR:
 323                                 errx(1, "%s: specification is incomplete",
 324                                         string);
 325                         case ENOMEM:
 326                                 errx(1, "%s: type is unknown to this program",
 327                                         string);
 328                         default:
 329                                 warn("%s", string);
 330                                 return 1;
 331                         }
 332                 }
 333                 if (!bflag)
 334                         printf(" -> ");
 335                 i = nflag;
 336                 nflag = 1;
 337                 j = show_var(mib, len);
 338                 if (!j && !bflag)
 339                         putchar('\n');
 340                 nflag = i;
 341         }
 342
 343         if (name_allocated != NULL)
 344                 free(name_allocated);
 345
 346         return 0;
 347 }
 348
 349 /* These functions will dump out various interesting structures. */
 350
 351 static int
 352 S_clockinfo(size_t l2, void *p)
 353 {
 354         struct clockinfo *ci = (struct clockinfo*)p;
 355         if (l2 != sizeof(*ci))
 356                 err(1, "S_clockinfo %zu != %zu", l2, sizeof(*ci));
 357         printf("{ hz = %d, tick = %d, tickadj = %d, profhz = %d, stathz = %d }",
 358                 ci->hz, ci->tick, ci->tickadj, ci->profhz, ci->stathz);
 359         return (0);
 360 }
 361
 362 static int
 363 S_loadavg(size_t l2, void *p)
 364 {
 365         struct loadavg *tv = (struct loadavg*)p;
 366
 367         if (l2 != sizeof(*tv))
 368                 err(1, "S_loadavg %zu != %zu", l2, sizeof(*tv));
 369
 370         printf("{ %.2f %.2f %.2f }",
 371                 (double)tv->ldavg[0]/(double)tv->fscale,
 372                 (double)tv->ldavg[1]/(double)tv->fscale,
 373                 (double)tv->ldavg[2]/(double)tv->fscale);
 374         return (0);
 375 }
 376
 377 static int
 378 S_timespec(size_t l2, void *p)
 379 {
 380         struct timespec *ts = (struct timespec*)p;
 381         time_t tv_sec;
 382         char *p1, *p2;
 383
 384         if (l2 != sizeof(*ts))
 385                 err(1, "S_timespec %zu != %zu", l2, sizeof(*ts));
 386         printf("{ sec = %ld, nsec = %ld } ",
 387                 ts->tv_sec, ts->tv_nsec);
 388         tv_sec = ts->tv_sec;
 389         p1 = strdup(ctime(&tv_sec));
 390         for (p2=p1; *p2 ; p2++)
 391                 if (*p2 == '\n')
 392                         *p2 = '\0';
 393         fputs(p1, stdout);
 394         return (0);
 395 }
 396
 397 static int
 398 S_timeval(size_t l2, void *p)
 399 {
 400         struct timeval *tv = (struct timeval*)p;
 401         time_t tv_sec;
 402         char *p1, *p2;
 403
 404         if (l2 != sizeof(*tv))
 405                 err(1, "S_timeval %zu != %zu", l2, sizeof(*tv));
 406         printf("{ sec = %ld, usec = %ld } ",
 407                 tv->tv_sec, tv->tv_usec);
 408         tv_sec = tv->tv_sec;
 409         p1 = strdup(ctime(&tv_sec));
 410         for (p2=p1; *p2 ; p2++)
 411                 if (*p2 == '\n')
 412                         *p2 = '\0';
 413         fputs(p1, stdout);
 414         return (0);
 415 }
 416
 417 static int
 418 S_sensor(size_t l2, void *p)
 419 {
 420         struct sensor *s = (struct sensor *)p;
 421
 422         if (l2 != sizeof(*s)) {
 423                 warnx("S_sensor %zu != %zu", l2, sizeof(*s));
 424                 return (1);
 425         }
 426
 427         if (s->flags & SENSOR_FINVALID) {
 428                 /*
 429                  * XXX: with this flag, the node should be entirely ignored,
 430                  * but as the magic-based sysctl(8) is not too flexible, we
 431                  * simply have to print out that the sensor is invalid.
 432                  */
 433                 printf("invalid");
 434                 return (0);
 435         }
 436
 437         if (s->flags & SENSOR_FUNKNOWN)
 438                 printf("unknown");
 439         else {
 440                 switch (s->type) {
 441                 case SENSOR_TEMP:
 442                         printf("%.2f degC",
 443                             (s->value - 273150000) / 1000000.0);
 444                         break;
 445                 case SENSOR_FANRPM:
 446                         printf("%jd RPM", (intmax_t)s->value);
 447                         break;
 448                 case SENSOR_VOLTS_DC:
 449                         printf("%.2f VDC", s->value / 1000000.0);
 450                         break;
 451                 case SENSOR_WATTS:
 452                         printf("%.2f W", s->value / 1000000.0);
 453                         break;
 454                 case SENSOR_AMPS:
 455                         printf("%.2f A", s->value / 1000000.0);
 456                         break;
 457                 case SENSOR_WATTHOUR:
 458                         printf("%.2f Wh", s->value / 1000000.0);
 459                         break;
 460                 case SENSOR_AMPHOUR:
 461                         printf("%.2f Ah", s->value / 1000000.0);
 462                         break;
 463                 case SENSOR_INDICATOR:
 464                         printf("%s", s->value ? "On" : "Off");
 465                         break;
 466                 case SENSOR_FREQ:
 467                         printf("%jd Hz", (intmax_t)s->value);
 468                         break;
 469                 case SENSOR_ECC:
 470                 case SENSOR_INTEGER:
 471                         printf("%jd", (intmax_t)s->value);
 472                         break;
 473                 case SENSOR_PERCENT:
 474                         printf("%.2f%%", s->value / 1000.0);
 475                         break;
 476                 case SENSOR_LUX:
 477                         printf("%.2f lx", s->value / 1000000.0);
 478                         break;
 479                 case SENSOR_DRIVE:
 480                 {
 481                         const char *name;
 482
 483                         switch (s->value) {
 484                         case SENSOR_DRIVE_EMPTY:
 485                                 name = "empty";
 486                                 break;
 487                         case SENSOR_DRIVE_READY:
 488                                 name = "ready";
 489                                 break;
 490                         case SENSOR_DRIVE_POWERUP:
 491                                 name = "powering up";
 492                                 break;
 493                         case SENSOR_DRIVE_ONLINE:
 494                                 name = "online";
 495                                 break;
 496                         case SENSOR_DRIVE_IDLE:
 497                                 name = "idle";
 498                                 break;
 499                         case SENSOR_DRIVE_ACTIVE:
 500                                 name = "active";
 501                                 break;
 502                         case SENSOR_DRIVE_REBUILD:
 503                                 name = "rebuilding";
 504                                 break;
 505                         case SENSOR_DRIVE_POWERDOWN:
 506                                 name = "powering down";
 507                                 break;
 508                         case SENSOR_DRIVE_FAIL:
 509                                 name = "failed";
 510                                 break;
 511                         case SENSOR_DRIVE_PFAIL:
 512                                 name = "degraded";
 513                                 break;
 514                         default:
 515                                 name = "unknown";
 516                                 break;
 517                         }
 518                         printf("%s", name);
 519                         break;
 520                 }
 521                 case SENSOR_TIMEDELTA:
 522                         printf("%.6f secs", s->value / 1000000000.0);
 523                         break;
 524                 default:
 525                         printf("unknown");
 526                 }
 527         }
 528
 529         if (s->desc[0] != '\0')
 530                 printf(" (%s)", s->desc);
 531
 532         switch (s->status) {
 533         case SENSOR_S_UNSPEC:
 534                 break;
 535         case SENSOR_S_OK:
 536                 printf(", OK");
 537                 break;
 538         case SENSOR_S_WARN:
 539                 printf(", WARNING");
 540                 break;
 541         case SENSOR_S_CRIT:
 542                 printf(", CRITICAL");
 543                 break;
 544         case SENSOR_S_UNKNOWN:
 545                 printf(", UNKNOWN");
 546                 break;
 547         }
 548
 549         if (s->tv.tv_sec) {
 550                 time_t t = s->tv.tv_sec;
 551                 char ct[26];
 552
 553                 ctime_r(&t, ct);
 554                 ct[19] = '\0';
 555                 printf(", %s.%03ld", ct, s->tv.tv_usec / 1000);
 556         }
 557
 558         return (0);
 559 }
 560
 561 #ifdef __x86_64__
 562 static int
 563 S_efi_map(size_t l2, void *p)
 564 {
 565         struct efi_map_header *efihdr;
 566         struct efi_md *map;
 567         const char *type;
 568         size_t efisz;
 569         int ndesc, i;
 570
 571         static const char *types[] = {
 572                 "Reserved",
 573                 "LoaderCode",
 574                 "LoaderData",
 575                 "BootServicesCode",
 576                 "BootServicesData",
 577                 "RuntimeServicesCode",
 578                 "RuntimeServicesData",
 579                 "ConventionalMemory",
 580                 "UnusableMemory",
 581                 "ACPIReclaimMemory",
 582                 "ACPIMemoryNVS",
 583                 "MemoryMappedIO",
 584                 "MemoryMappedIOPortSpace",
 585                 "PalCode"
 586         };
 587
 588         /*
 589          * Memory map data provided by UEFI via the GetMemoryMap
 590          * Boot Services API.
 591          */
 592         if (l2 < sizeof(*efihdr)) {
 593                 warnx("S_efi_map length less than header");
 594                 return (1);
 595         }
 596         efihdr = p;
 597         efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
 598         map = (struct efi_md *)((uint8_t *)efihdr + efisz);
 599
 600         if (efihdr->descriptor_size == 0)
 601                 return (0);
 602         if (l2 != efisz + efihdr->memory_size) {
 603                 warnx("S_efi_map length mismatch %zu vs %zu", l2, efisz +
 604                     efihdr->memory_size);
 605                 return (1);
 606         }
 607         ndesc = efihdr->memory_size / efihdr->descriptor_size;
 608
 609         printf("\n%23s %12s %12s %8s %4s",
 610             "Type", "Physical", "Virtual", "#Pages", "Attr");
 611
 612         for (i = 0; i < ndesc; i++,
 613             map = efi_next_descriptor(map, efihdr->descriptor_size)) {
 614                 if (map->md_type <= EFI_MD_TYPE_PALCODE)
 615                         type = types[map->md_type];
 616                 else
 617                         type = "<INVALID>";
 618                 printf("\n%23s %012lx %12p %08lx ", type, map->md_phys,
 619                     map->md_virt, map->md_pages);
 620                 if (map->md_attr & EFI_MD_ATTR_UC)
 621                         printf("UC ");
 622                 if (map->md_attr & EFI_MD_ATTR_WC)
 623                         printf("WC ");
 624                 if (map->md_attr & EFI_MD_ATTR_WT)
 625                         printf("WT ");
 626                 if (map->md_attr & EFI_MD_ATTR_WB)
 627                         printf("WB ");
 628                 if (map->md_attr & EFI_MD_ATTR_UCE)
 629                         printf("UCE ");
 630                 if (map->md_attr & EFI_MD_ATTR_WP)
 631                         printf("WP ");
 632                 if (map->md_attr & EFI_MD_ATTR_RP)
 633                         printf("RP ");
 634                 if (map->md_attr & EFI_MD_ATTR_XP)
 635                         printf("XP ");
 636                 if (map->md_attr & EFI_MD_ATTR_RT)
 637                         printf("RUNTIME");
 638         }
 639         return (0);
 640 }
 641 #endif
 642
 643 static int
 644 T_dev_t(size_t l2, void *p)
 645 {
 646         dev_t *d = (dev_t *)p;
 647         if (l2 != sizeof(*d))
 648                 err(1, "T_dev_T %zu != %zu", l2, sizeof(*d));
 649         if ((int)(*d) != -1) {
 650                 if (minor(*d) > 255 || minor(*d) < 0)
 651                         printf("{ major = %d, minor = 0x%x }",
 652                                 major(*d), minor(*d));
 653                 else
 654                         printf("{ major = %d, minor = %d }",
 655                                 major(*d), minor(*d));
 656         }
 657         return (0);
 658 }
 659
 660 static void
 661 set_T_dev_t(const char *path, void **val, size_t *size)
 662 {
 663         static struct stat statb;
 664
 665         if (strcmp(path, "none") && strcmp(path, "off")) {
 666                 int rc = stat (path, &statb);
 667                 if (rc) {
 668                         err(1, "cannot stat %s", path);
 669                 }
 670
 671                 if (!S_ISCHR(statb.st_mode)) {
 672                         errx(1, "must specify a device special file.");
 673                 }
 674         } else {
 675                 statb.st_rdev = NODEV;
 676         }
 677         *val = (char*) &statb.st_rdev;
 678         *size = sizeof statb.st_rdev;
 679 }
 680
 681 static int
 682 set_IK(const char *str, int *val)
 683 {
 684         float temp;
 685         int len, kelv;
 686         const char *p;
 687         char *endptr;
 688
 689         if ((len = strlen(str)) == 0)
 690                 return (0);
 691         p = &str[len - 1];
 692         if (*p == 'C' || *p == 'F') {
 693                 temp = strtof(str, &endptr);
 694                 if (endptr == str || endptr != p)
 695                         return 0;
 696                 if (*p == 'F')
 697                         temp = (temp - 32) * 5 / 9;
 698                 kelv = temp * 10 + 2732;
 699         } else {
 700                 /*
 701                  * I would like to just use, 0 but it would make numbers
 702                  * like '023' which were interpreted as decimal before
 703                  * suddenly interpreted as octal.
 704                  */
 705                 if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
 706                         kelv = (int)strtol(str, &endptr, 0);
 707                 else
 708                         kelv = (int)strtol(str, &endptr, 10);
 709                 if (endptr == str || *endptr != '\0')
 710                         return 0;
 711         }
 712         *val = kelv;
 713         return 1;
 714 }
 715
 716 /*
 717  * These functions uses a presently undocumented interface to the kernel
 718  * to walk the tree and get the type so it can print the value.
 719  * This interface is under work and consideration, and should probably
 720  * be killed with a big axe by the first person who can find the time.
 721  * (be aware though, that the proper interface isn't as obvious as it
 722  * may seem, there are various conflicting requirements.
 723  */
 724
 725 static int
 726 oidfmt(int *oid, size_t len, char *fmt, u_int *kind)
 727 {
 728         int qoid[CTL_MAXNAME+2];
 729         u_char buf[BUFSIZ];
 730         int i;
 731         size_t j;
 732
 733         qoid[0] = 0;
 734         qoid[1] = 4;
 735         memcpy(qoid + 2, oid, len * sizeof(int));
 736
 737         j = sizeof(buf);
 738         i = sysctl(qoid, len + 2, buf, &j, 0, 0);
 739         if (i)
 740                 err(1, "sysctl fmt %d %zu %d", i, j, errno);
 741
 742         if (kind)
 743                 *kind = *(u_int *)buf;
 744
 745         if (fmt)
 746                 strcpy(fmt, (char *)(buf + sizeof(u_int)));
 747         return 0;
 748 }
 749
 750 /*
 751  * This formats and outputs the value of one variable
 752  *
 753  * Returns zero if anything was actually output.
 754  * Returns one if didn't know what to do with this.
 755  * Return minus one if we had errors.
 756  */
 757
 758 static int
 759 show_var(int *oid, size_t nlen)
 760 {
 761         u_char buf[BUFSIZ], *val = NULL, *p, *nul;
 762         char name[BUFSIZ], *fmt;
 763         const char *sep, *spacer;
 764         int qoid[CTL_MAXNAME+2];
 765         int i;
 766         size_t j, len;
 767         u_int kind;
 768         int (*func)(size_t, void *);
 769         int error = 0;
 770
 771         qoid[0] = 0;
 772         memcpy(qoid + 2, oid, nlen * sizeof(int));
 773
 774         qoid[1] = 1;
 775         j = sizeof(name);
 776         i = sysctl(qoid, nlen + 2, name, &j, 0, 0);
 777         if (i || !j)
 778                 err(1, "sysctl name %d %zu %d", i, j, errno);
 779
 780         if (Nflag) {
 781                 printf("%s", name);
 782                 return (0);
 783         }
 784
 785         if (eflag)
 786                 sep = "=";
 787         else
 788                 sep = ": ";
 789
 790         if (dflag) {    /* just print description */
 791                 qoid[1] = 5;
 792                 j = sizeof(buf);
 793                 i = sysctl(qoid, nlen + 2, buf, &j, 0, 0);
 794                 if (!nflag)
 795                         printf("%s%s", name, sep);
 796                 printf("%s", buf);
 797                 return(0);
 798         }
 799         /* find an estimate of how much we need for this var */
 800         j = 0;
 801         i = sysctl(oid, nlen, 0, &j, 0, 0);
 802         j += j; /* we want to be sure :-) */
 803
 804         val = malloc(j + 1);
 805         if (val == NULL)
 806                 return (1);
 807
 808         len = j;
 809         i = sysctl(oid, nlen, val, &len, 0, 0);
 810         if (i || !len) {
 811                 error = 1;
 812                 goto done;
 813         }
 814
 815         if (bflag) {
 816                 fwrite(val, 1, len, stdout);
 817                 goto done;
 818         }
 819
 820         val[len] = '\0';
 821         fmt = buf;
 822         oidfmt(oid, nlen, fmt, &kind);
 823         p = val;
 824         switch (*fmt) {
 825         case 'A':
 826                 if (!nflag)
 827                         printf("%s%s", name, sep);
 828                 nul = memchr(p, '\0', len);
 829                 fwrite(p, nul == NULL ? (int)len : nul - p, 1, stdout);
 830                 return (0);
 831
 832         case 'C':
 833                 if (!nflag)
 834                         printf("%s%s", name, sep);
 835                 fmt++;
 836                 spacer = "";
 837                 while (len >= sizeof(char)) {
 838                         if(*fmt == 'U')
 839                                 printf("%s%hhu", spacer, *(unsigned char *)p);
 840                         else
 841                                 printf("%s%hhd", spacer, *(char *)p);
 842                         spacer = " ";
 843                         len -= sizeof(char);
 844                         p += sizeof(char);
 845                 }
 846                 goto done;
 847
 848         case 'I':
 849                 if (!nflag)
 850                         printf("%s%s", name, sep);
 851                 fmt++;
 852                 spacer = "";
 853                 while (len >= sizeof(int)) {
 854                         if(*fmt == 'U')
 855                                 printf("%s%u", spacer, *(unsigned int *)p);
 856                         else if (*fmt == 'K' && *(int *)p >= 0)
 857                                 printf("%s%.1fC", spacer, (*(int *)p - 2732) / 10.0);
 858                         else
 859                                 printf("%s%d", spacer, *(int *)p);
 860                         spacer = " ";
 861                         len -= sizeof(int);
 862                         p += sizeof(int);
 863                 }
 864                 goto done;
 865
 866         case 'L':
 867                 if (!nflag)
 868                         printf("%s%s", name, sep);
 869                 fmt++;
 870                 spacer = "";
 871                 while (len >= sizeof(long)) {
 872                         if(*fmt == 'U')
 873                                 printf("%s%lu", spacer, *(unsigned long *)p);
 874                         else
 875                                 printf("%s%ld", spacer, *(long *)p);
 876                         spacer = " ";
 877                         len -= sizeof(long);
 878                         p += sizeof(long);
 879                 }
 880                 goto done;
 881
 882         case 'P':
 883                 if (!nflag)
 884                         printf("%s%s", name, sep);
 885                 printf("%p", *(void **)p);
 886                 goto done;
 887
 888         case 'Q':
 889                 if (!nflag)
 890                         printf("%s%s", name, sep);
 891                 fmt++;
 892                 spacer = "";
 893                 while (len >= sizeof(quad_t)) {
 894                         if(*fmt == 'U') {
 895                                 printf("%s%ju",
 896                                        spacer, (uintmax_t)*(u_quad_t *)p);
 897                         } else {
 898                                 printf("%s%jd",
 899                                        spacer, (intmax_t)*(quad_t *)p);
 900                         }
 901                         spacer = " ";
 902                         len -= sizeof(int64_t);
 903                         p += sizeof(int64_t);
 904                 }
 905                 goto done;
 906
 907         case 'T':
 908         case 'S':
 909                 if (fmt[0] == 'S' && fmt[1] != ',') {
 910                         if (!nflag)
 911                                 printf("%s%s", name, sep);
 912                         fmt++;
 913                         spacer = "";
 914                         while (len >= sizeof(short)) {
 915                                 if(*fmt == 'U')
 916                                         printf("%s%hu", spacer,
 917                                             *(unsigned short *)p);
 918                                 else
 919                                         printf("%s%hd", spacer, *(short *)p);
 920                                 spacer = " ";
 921                                 len -= sizeof(short);
 922                                 p += sizeof(short);
 923                         }
 924                         goto done;
 925                 }
 926
 927                 if (!oflag && !xflag) {
 928                         i = 0;
 929                         if (strcmp(fmt, "S,clockinfo") == 0)
 930                                 func = S_clockinfo;
 931                         else if (strcmp(fmt, "S,timespec") == 0)
 932                                 func = S_timespec;
 933                         else if (strcmp(fmt, "S,timeval") == 0)
 934                                 func = S_timeval;
 935                         else if (strcmp(fmt, "S,loadavg") == 0)
 936                                 func = S_loadavg;
 937                         else if (strcmp(fmt, "S,sensor") == 0)
 938                                 func = S_sensor;
 939 #ifdef __x86_64__
 940                         else if (strcmp(fmt, "S,efi_map_header") == 0)
 941                                 func = S_efi_map;
 942 #endif
 943                         else if (strcmp(fmt, "T,dev_t") == 0)
 944                                 func = T_dev_t;
 945                         else if (strcmp(fmt, "T,udev_t") == 0)
 946                                 func = T_dev_t;
 947                         else
 948                                 func = NULL;
 949                         if (func) {
 950                                 if (!nflag)
 951                                         printf("%s%s", name, sep);
 952                                 error = (*func)(len, p);
 953                                 goto done;
 954                         }
 955                 }
 956                 /* FALL THROUGH */
 957         default:
 958                 if (!oflag && !xflag) {
 959                         error = 1;
 960                         goto done;
 961                 }
 962                 if (!nflag)
 963                         printf("%s%s", name, sep);
 964                 printf("Format:%s Length:%zu Dump:0x", fmt, len);
 965                 while (len-- && (xflag || p < val + 16))
 966                         printf("%02x", *p++);
 967                 if (!xflag && len > 16)
 968                         printf("...");
 969                 goto done;
 970         }
 971
 972 done:
 973         if (val != NULL)
 974                 free(val);
 975         return (error);
 976 }
 977
 978 static int
 979 sysctl_all(int *oid, size_t len)
 980 {
 981         int name1[22], name2[22];
 982         int retval;
 983         size_t i, l1, l2;
 984
 985         name1[0] = 0;
 986         name1[1] = 2;
 987         l1 = 2;
 988         if (len) {
 989                 memcpy(name1+2, oid, len * sizeof(int));
 990                 l1 += len;
 991         } else {
 992                 name1[2] = 1;
 993                 l1++;
 994         }
 995         for (;;) {
 996                 l2 = sizeof(name2);
 997                 retval = sysctl(name1, l1, name2, &l2, 0, 0);
 998                 if (retval < 0) {
 999                         if (errno == ENOENT)
1000                                 return 0;
1001                         else
1002                                 err(1, "sysctl(getnext) %d %zu", retval, l2);
1003                 }
1004
1005                 l2 /= sizeof(int);
1006
1007                 if (l2 < len)
1008                         return 0;
1009
1010                 for (i = 0; i < len; i++)
1011                         if (name2[i] != oid[i])
1012                                 return 0;
1013
1014                 retval = show_var(name2, l2);
1015                 if (retval == 0 && !bflag)
1016                         putchar('\n');
1017
1018                 memcpy(name1+2, name2, l2 * sizeof(int));
1019                 l1 = 2 + l2;
1020         }
1021 }