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 #ifdef __i386__
  35 #include <sys/diskslice.h>      /* used for bootdev parsing */
  36 #include <sys/reboot.h>         /* used for bootdev parsing */
  37 #endif
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40 #include <sys/sysctl.h>
  41 #include <sys/resource.h>
  42 #include <sys/sensors.h>
  43 #include <sys/param.h>
  44
  45 #include <machine/inttypes.h>
  46
  47 #include <ctype.h>
  48 #include <err.h>
  49 #include <errno.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
  57 static int      oidfmt(int *, size_t, char *, u_int *);
  58 static void     parse(const char *);
  59 static int      show_var(int *, size_t);
  60 static int      sysctl_all(int *, size_t);
  61 static void     set_T_dev_t(const char *, void **, size_t *);
  62 static int      set_IK(const char *, int *);
  63
  64 static void
  65 usage(void)
  66 {
  67
  68         fprintf(stderr, "%s\n%s\n",
  69             "usage: sysctl [-bdeNnox] variable[=value] ...",
  70             "       sysctl [-bdeNnox] -a");
  71         exit(1);
  72 }
  73
  74 int
  75 main(int argc, char **argv)
  76 {
  77         int ch;
  78         setbuf(stdout,0);
  79         setbuf(stderr,0);
  80
  81         while ((ch = getopt(argc, argv, "AabdeNnowxX")) != -1) {
  82                 switch (ch) {
  83                 case 'A':
  84                         /* compatibility */
  85                         aflag = oflag = 1;
  86                         break;
  87                 case 'a':
  88                         aflag = 1;
  89                         break;
  90                 case 'b':
  91                         bflag = 1;
  92                         break;
  93                 case 'd':
  94                         dflag = 1;
  95                         break;
  96                 case 'e':
  97                         eflag = 1;
  98                         break;
  99                 case 'N':
 100                         Nflag = 1;
 101                         break;
 102                 case 'n':
 103                         nflag = 1;
 104                         break;
 105                 case 'o':
 106                         oflag = 1;
 107                         break;
 108                 case 'w':
 109                         /* compatibility */
 110                         /* ignored */
 111                         break;
 112                 case 'X':
 113                         /* compatibility */
 114                         aflag = xflag = 1;
 115                         break;
 116                 case 'x':
 117                         xflag = 1;
 118                         break;
 119                 default:
 120                         usage();
 121                 }
 122         }
 123         argc -= optind;
 124         argv += optind;
 125
 126         if (Nflag && nflag)
 127                 usage();
 128         if (aflag && argc == 0)
 129                 exit(sysctl_all(0, 0));
 130         if (argc == 0)
 131                 usage();
 132         while (argc-- > 0)
 133                 parse(*argv++);
 134         exit(0);
 135 }
 136
 137 /*
 138  * Parse a name into a MIB entry.
 139  * Lookup and print out the MIB entry if it exists.
 140  * Set a new value if requested.
 141  */
 142 static void
 143 parse(const char *string)
 144 {
 145         size_t len;
 146         int i, j;
 147         void *newval = NULL;
 148         int intval;
 149         unsigned int uintval;
 150         long longval;
 151         unsigned long ulongval;
 152         size_t newsize = 0;
 153         quad_t quadval;
 154         u_quad_t uquadval;
 155         int mib[CTL_MAXNAME];
 156         char *cp, fmt[BUFSIZ];
 157         const char *name;
 158         char *name_allocated = NULL;
 159         u_int kind;
 160
 161         if ((cp = strchr(string, '=')) != NULL) {
 162                 if ((name_allocated = malloc(cp - string + 1)) == NULL)
 163                         err(1, "malloc failed");
 164                 strlcpy(name_allocated, string, cp - string + 1);
 165                 name = name_allocated;
 166
 167                 while (isspace(*++cp))
 168                         ;
 169
 170                 newval = cp;
 171                 newsize = strlen(cp);
 172         } else {
 173                 name = string;
 174         }
 175
 176         len = CTL_MAXNAME;
 177         if (sysctlnametomib(name, mib, &len) < 0) {
 178                 if (errno == ENOENT) {
 179                         errx(1, "unknown oid '%s'", name);
 180                 } else {
 181                         err(1, "sysctlnametomib(\"%s\")", name);
 182                 }
 183         }
 184
 185         if (oidfmt(mib, len, fmt, &kind))
 186                 err(1, "couldn't find format of oid '%s'", name);
 187
 188         if (newval == NULL) {
 189                 if ((kind & CTLTYPE) == CTLTYPE_NODE) {
 190                         sysctl_all(mib, len);
 191                 } else {
 192                         i = show_var(mib, len);
 193                         if (!i && !bflag)
 194                                 putchar('\n');
 195                 }
 196         } else {
 197                 if ((kind & CTLTYPE) == CTLTYPE_NODE)
 198                         errx(1, "oid '%s' isn't a leaf node", name);
 199
 200                 if (!(kind&CTLFLAG_WR))
 201                         errx(1, "oid '%s' is read only", name);
 202
 203                 switch (kind & CTLTYPE) {
 204                         case CTLTYPE_INT:
 205                                 if (!(strcmp(fmt, "IK") == 0)) {
 206                                         if (!set_IK(newval, &intval))
 207                                                 errx(1, "invalid value '%s'",
 208                                                     (char *)newval);
 209                                 } else
 210                                         intval = (int) strtol(newval, NULL, 0);
 211                                 newval = &intval;
 212                                 newsize = sizeof(intval);
 213                                 break;
 214                         case CTLTYPE_UINT:
 215                                 uintval = (int) strtoul(newval, NULL, 0);
 216                                 newval = &uintval;
 217                                 newsize = sizeof uintval;
 218                                 break;
 219                         case CTLTYPE_LONG:
 220                                 longval = strtol(newval, NULL, 0);
 221                                 newval = &longval;
 222                                 newsize = sizeof longval;
 223                                 break;
 224                         case CTLTYPE_ULONG:
 225                                 ulongval = strtoul(newval, NULL, 0);
 226                                 newval = &ulongval;
 227                                 newsize = sizeof ulongval;
 228                                 break;
 229                         case CTLTYPE_STRING:
 230                                 break;
 231                         case CTLTYPE_QUAD:
 232                                 quadval = strtoq(newval, NULL, 0);
 233                                 newval = &quadval;
 234                                 newsize = sizeof(quadval);
 235                                 break;
 236                         case CTLTYPE_UQUAD:
 237                                 uquadval = strtouq(newval, NULL, 0);
 238                                 newval = &uquadval;
 239                                 newsize = sizeof(uquadval);
 240                                 break;
 241                         case CTLTYPE_OPAQUE:
 242                                 if (strcmp(fmt, "T,dev_t") == 0 ||
 243                                     strcmp(fmt, "T,udev_t") == 0
 244                                 ) {
 245                                         set_T_dev_t((char*)newval, &newval,
 246                                                     &newsize);
 247                                         break;
 248                                 }
 249                                 /* FALLTHROUGH */
 250                         default:
 251                                 errx(1, "oid '%s' is type %d,"
 252                                         " cannot set that", name,
 253                                         kind & CTLTYPE);
 254                 }
 255
 256                 i = show_var(mib, len);
 257                 if (sysctl(mib, len, 0, 0, newval, newsize) == -1) {
 258                         if (!i && !bflag)
 259                                 putchar('\n');
 260                         switch (errno) {
 261                         case EOPNOTSUPP:
 262                                 errx(1, "%s: value is not available",
 263                                         string);
 264                         case ENOTDIR:
 265                                 errx(1, "%s: specification is incomplete",
 266                                         string);
 267                         case ENOMEM:
 268                                 errx(1, "%s: type is unknown to this program",
 269                                         string);
 270                         default:
 271                                 warn("%s", string);
 272                                 return;
 273                         }
 274                 }
 275                 if (!bflag)
 276                         printf(" -> ");
 277                 i = nflag;
 278                 nflag = 1;
 279                 j = show_var(mib, len);
 280                 if (!j && !bflag)
 281                         putchar('\n');
 282                 nflag = i;
 283         }
 284
 285         if (name_allocated != NULL)
 286                 free(name_allocated);
 287 }
 288
 289 /* These functions will dump out various interesting structures. */
 290
 291 static int
 292 S_clockinfo(int l2, void *p)
 293 {
 294         struct clockinfo *ci = (struct clockinfo*)p;
 295         if (l2 != sizeof(*ci))
 296                 err(1, "S_clockinfo %d != %zu", l2, sizeof(*ci));
 297         printf("{ hz = %d, tick = %d, tickadj = %d, profhz = %d, stathz = %d }",
 298                 ci->hz, ci->tick, ci->tickadj, ci->profhz, ci->stathz);
 299         return (0);
 300 }
 301
 302 static int
 303 S_loadavg(int l2, void *p)
 304 {
 305         struct loadavg *tv = (struct loadavg*)p;
 306
 307         if (l2 != sizeof(*tv))
 308                 err(1, "S_loadavg %d != %zu", l2, sizeof(*tv));
 309
 310         printf("{ %.2f %.2f %.2f }",
 311                 (double)tv->ldavg[0]/(double)tv->fscale,
 312                 (double)tv->ldavg[1]/(double)tv->fscale,
 313                 (double)tv->ldavg[2]/(double)tv->fscale);
 314         return (0);
 315 }
 316
 317 static int
 318 S_timespec(int l2, void *p)
 319 {
 320         struct timespec *ts = (struct timespec*)p;
 321         time_t tv_sec;
 322         char *p1, *p2;
 323
 324         if (l2 != sizeof(*ts))
 325                 err(1, "S_timespec %d != %zu", l2, sizeof(*ts));
 326         printf("{ sec = %ld, nsec = %ld } ",
 327                 ts->tv_sec, ts->tv_nsec);
 328         tv_sec = ts->tv_sec;
 329         p1 = strdup(ctime(&tv_sec));
 330         for (p2=p1; *p2 ; p2++)
 331                 if (*p2 == '\n')
 332                         *p2 = '\0';
 333         fputs(p1, stdout);
 334         return (0);
 335 }
 336
 337 static int
 338 S_timeval(int l2, void *p)
 339 {
 340         struct timeval *tv = (struct timeval*)p;
 341         time_t tv_sec;
 342         char *p1, *p2;
 343
 344         if (l2 != sizeof(*tv))
 345                 err(1, "S_timeval %d != %zu", l2, sizeof(*tv));
 346         printf("{ sec = %ld, usec = %ld } ",
 347                 tv->tv_sec, tv->tv_usec);
 348         tv_sec = tv->tv_sec;
 349         p1 = strdup(ctime(&tv_sec));
 350         for (p2=p1; *p2 ; p2++)
 351                 if (*p2 == '\n')
 352                         *p2 = '\0';
 353         fputs(p1, stdout);
 354         return (0);
 355 }
 356
 357 static int
 358 S_sensor(int l2, void *p)
 359 {
 360         struct sensor *s = (struct sensor *)p;
 361
 362         if (l2 != sizeof(*s)) {
 363                 warnx("S_sensor %d != %zu", l2, sizeof(*s));
 364                 return (1);
 365         }
 366
 367         if (s->flags & SENSOR_FINVALID) {
 368                 /*
 369                  * XXX: with this flag, the node should be entirely ignored,
 370                  * but as the magic-based sysctl(8) is not too flexible, we
 371                  * simply have to print out that the sensor is invalid.
 372                  */
 373                 printf("invalid");
 374                 return (0);
 375         }
 376
 377         if (s->flags & SENSOR_FUNKNOWN)
 378                 printf("unknown");
 379         else {
 380                 switch (s->type) {
 381                 case SENSOR_TEMP:
 382                         printf("%.2f degC",
 383                             (s->value - 273150000) / 1000000.0);
 384                         break;
 385                 case SENSOR_FANRPM:
 386                         printf("%jd RPM", (intmax_t)s->value);
 387                         break;
 388                 case SENSOR_VOLTS_DC:
 389                         printf("%.2f VDC", s->value / 1000000.0);
 390                         break;
 391                 case SENSOR_WATTS:
 392                         printf("%.2f W", s->value / 1000000.0);
 393                         break;
 394                 case SENSOR_AMPS:
 395                         printf("%.2f A", s->value / 1000000.0);
 396                         break;
 397                 case SENSOR_WATTHOUR:
 398                         printf("%.2f Wh", s->value / 1000000.0);
 399                         break;
 400                 case SENSOR_AMPHOUR:
 401                         printf("%.2f Ah", s->value / 1000000.0);
 402                         break;
 403                 case SENSOR_INDICATOR:
 404                         printf("%s", s->value ? "On" : "Off");
 405                         break;
 406                 case SENSOR_FREQ:
 407                         printf("%jd Hz", (intmax_t)s->value);
 408                         break;
 409                 case SENSOR_ECC:
 410                 case SENSOR_INTEGER:
 411                         printf("%jd", (intmax_t)s->value);
 412                         break;
 413                 case SENSOR_PERCENT:
 414                         printf("%.2f%%", s->value / 1000.0);
 415                         break;
 416                 case SENSOR_LUX:
 417                         printf("%.2f lx", s->value / 1000000.0);
 418                         break;
 419                 case SENSOR_DRIVE:
 420                 {
 421                         const char *name;
 422
 423                         switch (s->value) {
 424                         case SENSOR_DRIVE_EMPTY:
 425                                 name = "empty";
 426                                 break;
 427                         case SENSOR_DRIVE_READY:
 428                                 name = "ready";
 429                                 break;
 430                         case SENSOR_DRIVE_POWERUP:
 431                                 name = "powering up";
 432                                 break;
 433                         case SENSOR_DRIVE_ONLINE:
 434                                 name = "online";
 435                                 break;
 436                         case SENSOR_DRIVE_IDLE:
 437                                 name = "idle";
 438                                 break;
 439                         case SENSOR_DRIVE_ACTIVE:
 440                                 name = "active";
 441                                 break;
 442                         case SENSOR_DRIVE_REBUILD:
 443                                 name = "rebuilding";
 444                                 break;
 445                         case SENSOR_DRIVE_POWERDOWN:
 446                                 name = "powering down";
 447                                 break;
 448                         case SENSOR_DRIVE_FAIL:
 449                                 name = "failed";
 450                                 break;
 451                         case SENSOR_DRIVE_PFAIL:
 452                                 name = "degraded";
 453                                 break;
 454                         default:
 455                                 name = "unknown";
 456                                 break;
 457                         }
 458                         printf("%s", name);
 459                         break;
 460                 }
 461                 case SENSOR_TIMEDELTA:
 462                         printf("%.6f secs", s->value / 1000000000.0);
 463                         break;
 464                 default:
 465                         printf("unknown");
 466                 }
 467         }
 468
 469         if (s->desc[0] != '\0')
 470                 printf(" (%s)", s->desc);
 471
 472         switch (s->status) {
 473         case SENSOR_S_UNSPEC:
 474                 break;
 475         case SENSOR_S_OK:
 476                 printf(", OK");
 477                 break;
 478         case SENSOR_S_WARN:
 479                 printf(", WARNING");
 480                 break;
 481         case SENSOR_S_CRIT:
 482                 printf(", CRITICAL");
 483                 break;
 484         case SENSOR_S_UNKNOWN:
 485                 printf(", UNKNOWN");
 486                 break;
 487         }
 488
 489         if (s->tv.tv_sec) {
 490                 time_t t = s->tv.tv_sec;
 491                 char ct[26];
 492
 493                 ctime_r(&t, ct);
 494                 ct[19] = '\0';
 495                 printf(", %s.%03ld", ct, s->tv.tv_usec / 1000);
 496         }
 497
 498         return (0);
 499 }
 500
 501 static int
 502 T_dev_t(int l2, void *p)
 503 {
 504         dev_t *d = (dev_t *)p;
 505         if (l2 != sizeof(*d))
 506                 err(1, "T_dev_T %d != %zu", l2, sizeof(*d));
 507         if ((int)(*d) != -1) {
 508                 if (minor(*d) > 255 || minor(*d) < 0)
 509                         printf("{ major = %d, minor = 0x%x }",
 510                                 major(*d), minor(*d));
 511                 else
 512                         printf("{ major = %d, minor = %d }",
 513                                 major(*d), minor(*d));
 514         }
 515         return (0);
 516 }
 517
 518 static void
 519 set_T_dev_t(const char *path, void **val, size_t *size)
 520 {
 521         static struct stat statb;
 522
 523         if (strcmp(path, "none") && strcmp(path, "off")) {
 524                 int rc = stat (path, &statb);
 525                 if (rc) {
 526                         err(1, "cannot stat %s", path);
 527                 }
 528
 529                 if (!S_ISCHR(statb.st_mode)) {
 530                         errx(1, "must specify a device special file.");
 531                 }
 532         } else {
 533                 statb.st_rdev = NODEV;
 534         }
 535         *val = (char*) &statb.st_rdev;
 536         *size = sizeof statb.st_rdev;
 537 }
 538
 539 static int
 540 set_IK(const char *str, int *val)
 541 {
 542         float temp;
 543         int len, kelv;
 544         const char *p;
 545         char *endptr;
 546
 547         if ((len = strlen(str)) == 0)
 548                 return (0);
 549         p = &str[len - 1];
 550         if (*p == 'C' || *p == 'F') {
 551                 temp = strtof(str, &endptr);
 552                 if (endptr == str || endptr != p)
 553                         return 0;
 554                 if (*p == 'F')
 555                         temp = (temp - 32) * 5 / 9;
 556                 kelv = temp * 10 + 2732;
 557         } else {
 558                 /*
 559                  * I would like to just use, 0 but it would make numbers
 560                  * like '023' which were interpreted as decimal before
 561                  * suddenly interpreted as octal.
 562                  */
 563                 if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
 564                         kelv = (int)strtol(str, &endptr, 0);
 565                 else
 566                         kelv = (int)strtol(str, &endptr, 10);
 567                 if (endptr == str || *endptr != '\0')
 568                         return 0;
 569         }
 570         *val = kelv;
 571         return 1;
 572 }
 573
 574 /*
 575  * These functions uses a presently undocumented interface to the kernel
 576  * to walk the tree and get the type so it can print the value.
 577  * This interface is under work and consideration, and should probably
 578  * be killed with a big axe by the first person who can find the time.
 579  * (be aware though, that the proper interface isn't as obvious as it
 580  * may seem, there are various conflicting requirements.
 581  */
 582
 583 static int
 584 oidfmt(int *oid, size_t len, char *fmt, u_int *kind)
 585 {
 586         int qoid[CTL_MAXNAME+2];
 587         u_char buf[BUFSIZ];
 588         int i;
 589         size_t j;
 590
 591         qoid[0] = 0;
 592         qoid[1] = 4;
 593         memcpy(qoid + 2, oid, len * sizeof(int));
 594
 595         j = sizeof(buf);
 596         i = sysctl(qoid, len + 2, buf, &j, 0, 0);
 597         if (i)
 598                 err(1, "sysctl fmt %d %zu %d", i, j, errno);
 599
 600         if (kind)
 601                 *kind = *(u_int *)buf;
 602
 603         if (fmt)
 604                 strcpy(fmt, (char *)(buf + sizeof(u_int)));
 605         return 0;
 606 }
 607
 608 #ifdef __i386__
 609 /*
 610  * Code to map a bootdev major number into a suitable device name.
 611  * Major numbers are mapped into names as in boot2.c
 612  */
 613 struct _foo {
 614         int majdev;
 615         const char *name;
 616 } maj2name[] = {
 617         { 30,   "ad" },
 618         { 0,    "wd" },
 619         { 1,    "wfd" },
 620         { 2,    "fd" },
 621         { 4,    "da" },
 622         { -1,   NULL }  /* terminator */
 623 };
 624
 625 static int
 626 machdep_bootdev(u_long value)
 627 {
 628         int majdev, unit, slice, part;
 629         struct _foo *p;
 630
 631         if ((value & B_MAGICMASK) != B_DEVMAGIC) {
 632                 printf("invalid (0x%08lx)", value);
 633                 return 0;
 634         }
 635         majdev = B_TYPE(value);
 636         unit = B_UNIT(value);
 637         slice = B_SLICE(value);
 638         part = B_PARTITION(value);
 639         if (majdev == 2) {      /* floppy, as known to the boot block... */
 640                 printf("/dev/fd%d", unit);
 641                 return 0;
 642         }
 643         for (p = maj2name; p->name != NULL && p->majdev != majdev ; p++) ;
 644         if (p->name != NULL) {  /* found */
 645                 if (slice == WHOLE_DISK_SLICE)
 646                         printf("/dev/%s%d%c", p->name, unit, part);
 647                 else
 648                         printf("/dev/%s%ds%d%c",
 649                             p->name, unit, slice - BASE_SLICE + 1, part + 'a');
 650         } else
 651                 printf("unknown (major %d unit %d slice %d part %d)",
 652                         majdev, unit, slice, part);
 653         return 0;
 654 }
 655 #endif
 656
 657 /*
 658  * This formats and outputs the value of one variable
 659  *
 660  * Returns zero if anything was actually output.
 661  * Returns one if didn't know what to do with this.
 662  * Return minus one if we had errors.
 663  */
 664
 665 static int
 666 show_var(int *oid, size_t nlen)
 667 {
 668         u_char buf[BUFSIZ], *val = NULL, *p, *nul;
 669         char name[BUFSIZ], *fmt;
 670         const char *sep, *spacer;
 671         int qoid[CTL_MAXNAME+2];
 672         int i;
 673         size_t j, len;
 674         u_int kind;
 675         int (*func)(int, void *);
 676         int error = 0;
 677
 678         qoid[0] = 0;
 679         memcpy(qoid + 2, oid, nlen * sizeof(int));
 680
 681         qoid[1] = 1;
 682         j = sizeof(name);
 683         i = sysctl(qoid, nlen + 2, name, &j, 0, 0);
 684         if (i || !j)
 685                 err(1, "sysctl name %d %zu %d", i, j, errno);
 686
 687         if (Nflag) {
 688                 printf("%s", name);
 689                 return (0);
 690         }
 691
 692         if (eflag)
 693                 sep = "=";
 694         else
 695                 sep = ": ";
 696
 697         if (dflag) {    /* just print description */
 698                 qoid[1] = 5;
 699                 j = sizeof(buf);
 700                 i = sysctl(qoid, nlen + 2, buf, &j, 0, 0);
 701                 if (!nflag)
 702                         printf("%s%s", name, sep);
 703                 printf("%s", buf);
 704                 return(0);
 705         }
 706         /* find an estimate of how much we need for this var */
 707         j = 0;
 708         i = sysctl(oid, nlen, 0, &j, 0, 0);
 709         j += j; /* we want to be sure :-) */
 710
 711         val = malloc(j + 1);
 712         if (val == NULL)
 713                 return (1);
 714
 715         len = j;
 716         i = sysctl(oid, nlen, val, &len, 0, 0);
 717         if (i || !len) {
 718                 error = 1;
 719                 goto done;
 720         }
 721
 722         if (bflag) {
 723                 fwrite(val, 1, len, stdout);
 724                 goto done;
 725         }
 726
 727         val[len] = '\0';
 728         fmt = buf;
 729         oidfmt(oid, nlen, fmt, &kind);
 730         p = val;
 731         switch (*fmt) {
 732         case 'A':
 733                 if (!nflag)
 734                         printf("%s%s", name, sep);
 735                 nul = memchr(p, '\0', len);
 736                 fwrite(p, nul == NULL ? (int)len : nul - p, 1, stdout);
 737                 return (0);
 738
 739         case 'I':
 740                 if (!nflag)
 741                         printf("%s%s", name, sep);
 742                 fmt++;
 743                 spacer = "";
 744                 while (len >= sizeof(int)) {
 745                         if(*fmt == 'U')
 746                                 printf("%s%u", spacer, *(unsigned int *)p);
 747                         else if (*fmt == 'K' && *(int *)p >= 0)
 748                                 printf("%s%.1fC", spacer, (*(int *)p - 2732) / 10.0);
 749                         else
 750                                 printf("%s%d", spacer, *(int *)p);
 751                         spacer = " ";
 752                         len -= sizeof(int);
 753                         p += sizeof(int);
 754                 }
 755                 goto done;
 756
 757         case 'L':
 758                 if (!nflag)
 759                         printf("%s%s", name, sep);
 760                 fmt++;
 761 #ifdef __i386__
 762                 if (!strcmp(name, "machdep.guessed_bootdev"))
 763                         return machdep_bootdev(*(unsigned long *)p);
 764 #endif
 765                 spacer = "";
 766                 while (len >= sizeof(long)) {
 767                         if(*fmt == 'U')
 768                                 printf("%s%lu", spacer, *(unsigned long *)p);
 769                         else
 770                                 printf("%s%ld", spacer, *(long *)p);
 771                         spacer = " ";
 772                         len -= sizeof(long);
 773                         p += sizeof(long);
 774                 }
 775                 goto done;
 776
 777         case 'P':
 778                 if (!nflag)
 779                         printf("%s%s", name, sep);
 780                 printf("%p", *(void **)p);
 781                 goto done;
 782
 783         case 'Q':
 784                 if (!nflag)
 785                         printf("%s%s", name, sep);
 786                 fmt++;
 787                 spacer = "";
 788                 while (len >= sizeof(quad_t)) {
 789                         if(*fmt == 'U') {
 790                                 printf("%s%ju",
 791                                        spacer, (uintmax_t)*(u_quad_t *)p);
 792                         } else {
 793                                 printf("%s%jd",
 794                                        spacer, (intmax_t)*(quad_t *)p);
 795                         }
 796                         spacer = " ";
 797                         len -= sizeof(int64_t);
 798                         p += sizeof(int64_t);
 799                 }
 800                 goto done;
 801
 802         case 'T':
 803         case 'S':
 804                 if (!oflag && !xflag) {
 805                         i = 0;
 806                         if (strcmp(fmt, "S,clockinfo") == 0)
 807                                 func = S_clockinfo;
 808                         else if (strcmp(fmt, "S,timespec") == 0)
 809                                 func = S_timespec;
 810                         else if (strcmp(fmt, "S,timeval") == 0)
 811                                 func = S_timeval;
 812                         else if (strcmp(fmt, "S,loadavg") == 0)
 813                                 func = S_loadavg;
 814                         else if (strcmp(fmt, "S,sensor") == 0)
 815                                 func = S_sensor;
 816                         else if (strcmp(fmt, "T,dev_t") == 0)
 817                                 func = T_dev_t;
 818                         else if (strcmp(fmt, "T,udev_t") == 0)
 819                                 func = T_dev_t;
 820                         else
 821                                 func = NULL;
 822                         if (func) {
 823                                 if (!nflag)
 824                                         printf("%s%s", name, sep);
 825                                 error = (*func)(len, p);
 826                                 goto done;
 827                         }
 828                 }
 829                 /* FALL THROUGH */
 830         default:
 831                 if (!oflag && !xflag) {
 832                         error = 1;
 833                         goto done;
 834                 }
 835                 if (!nflag)
 836                         printf("%s%s", name, sep);
 837                 printf("Format:%s Length:%zu Dump:0x", fmt, len);
 838                 while (len-- && (xflag || p < val + 16))
 839                         printf("%02x", *p++);
 840                 if (!xflag && len > 16)
 841                         printf("...");
 842                 goto done;
 843         }
 844
 845 done:
 846         if (val != NULL)
 847                 free(val);
 848         return (error);
 849 }
 850
 851 static int
 852 sysctl_all(int *oid, size_t len)
 853 {
 854         int name1[22], name2[22];
 855         int retval;
 856         size_t i, l1, l2;
 857
 858         name1[0] = 0;
 859         name1[1] = 2;
 860         l1 = 2;
 861         if (len) {
 862                 memcpy(name1+2, oid, len * sizeof(int));
 863                 l1 += len;
 864         } else {
 865                 name1[2] = 1;
 866                 l1++;
 867         }
 868         for (;;) {
 869                 l2 = sizeof(name2);
 870                 retval = sysctl(name1, l1, name2, &l2, 0, 0);
 871                 if (retval < 0) {
 872                         if (errno == ENOENT)
 873                                 return 0;
 874                         else
 875                                 err(1, "sysctl(getnext) %d %zu", retval, l2);
 876                 }
 877
 878                 l2 /= sizeof(int);
 879
 880                 if (l2 < len)
 881                         return 0;
 882
 883                 for (i = 0; i < len; i++)
 884                         if (name2[i] != oid[i])
 885                                 return 0;
 886
 887                 retval = show_var(name2, l2);
 888                 if (retval == 0 && !bflag)
 889                         putchar('\n');
 890
 891                 memcpy(name1+2, name2, l2 * sizeof(int));
 892                 l1 = 2 + l2;
 893         }
 894 }