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