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_AMPS:
 392                         printf("%.2f A", s->value / 1000000.0);
 393                         break;
 394                 case SENSOR_WATTHOUR:
 395                         printf("%.2f Wh", s->value / 1000000.0);
 396                         break;
 397                 case SENSOR_AMPHOUR:
 398                         printf("%.2f Ah", s->value / 1000000.0);
 399                         break;
 400                 case SENSOR_INDICATOR:
 401                         printf("%s", s->value ? "On" : "Off");
 402                         break;
 403                 case SENSOR_INTEGER:
 404                         printf("%jd", (intmax_t)s->value);
 405                         break;
 406                 case SENSOR_PERCENT:
 407                         printf("%.2f%%", s->value / 1000.0);
 408                         break;
 409                 case SENSOR_LUX:
 410                         printf("%.2f lx", s->value / 1000000.0);
 411                         break;
 412                 case SENSOR_DRIVE:
 413                 {
 414                         const char *name;
 415
 416                         switch (s->value) {
 417                         case SENSOR_DRIVE_EMPTY:
 418                                 name = "empty";
 419                                 break;
 420                         case SENSOR_DRIVE_READY:
 421                                 name = "ready";
 422                                 break;
 423                         case SENSOR_DRIVE_POWERUP:
 424                                 name = "powering up";
 425                                 break;
 426                         case SENSOR_DRIVE_ONLINE:
 427                                 name = "online";
 428                                 break;
 429                         case SENSOR_DRIVE_IDLE:
 430                                 name = "idle";
 431                                 break;
 432                         case SENSOR_DRIVE_ACTIVE:
 433                                 name = "active";
 434                                 break;
 435                         case SENSOR_DRIVE_REBUILD:
 436                                 name = "rebuilding";
 437                                 break;
 438                         case SENSOR_DRIVE_POWERDOWN:
 439                                 name = "powering down";
 440                                 break;
 441                         case SENSOR_DRIVE_FAIL:
 442                                 name = "failed";
 443                                 break;
 444                         case SENSOR_DRIVE_PFAIL:
 445                                 name = "degraded";
 446                                 break;
 447                         default:
 448                                 name = "unknown";
 449                                 break;
 450                         }
 451                         printf("%s", name);
 452                         break;
 453                 }
 454                 case SENSOR_TIMEDELTA:
 455                         printf("%.6f secs", s->value / 1000000000.0);
 456                         break;
 457                 default:
 458                         printf("unknown");
 459                 }
 460         }
 461
 462         if (s->desc[0] != '\0')
 463                 printf(" (%s)", s->desc);
 464
 465         switch (s->status) {
 466         case SENSOR_S_UNSPEC:
 467                 break;
 468         case SENSOR_S_OK:
 469                 printf(", OK");
 470                 break;
 471         case SENSOR_S_WARN:
 472                 printf(", WARNING");
 473                 break;
 474         case SENSOR_S_CRIT:
 475                 printf(", CRITICAL");
 476                 break;
 477         case SENSOR_S_UNKNOWN:
 478                 printf(", UNKNOWN");
 479                 break;
 480         }
 481
 482         if (s->tv.tv_sec) {
 483                 time_t t = s->tv.tv_sec;
 484                 char ct[26];
 485
 486                 ctime_r(&t, ct);
 487                 ct[19] = '\0';
 488                 printf(", %s.%03ld", ct, s->tv.tv_usec / 1000);
 489         }
 490
 491         return (0);
 492 }
 493
 494 static int
 495 T_dev_t(int l2, void *p)
 496 {
 497         dev_t *d = (dev_t *)p;
 498         if (l2 != sizeof(*d))
 499                 err(1, "T_dev_T %d != %zu", l2, sizeof(*d));
 500         if ((int)(*d) != -1) {
 501                 if (minor(*d) > 255 || minor(*d) < 0)
 502                         printf("{ major = %d, minor = 0x%x }",
 503                                 major(*d), minor(*d));
 504                 else
 505                         printf("{ major = %d, minor = %d }",
 506                                 major(*d), minor(*d));
 507         }
 508         return (0);
 509 }
 510
 511 static void
 512 set_T_dev_t(const char *path, void **val, size_t *size)
 513 {
 514         static struct stat statb;
 515
 516         if (strcmp(path, "none") && strcmp(path, "off")) {
 517                 int rc = stat (path, &statb);
 518                 if (rc) {
 519                         err(1, "cannot stat %s", path);
 520                 }
 521
 522                 if (!S_ISCHR(statb.st_mode)) {
 523                         errx(1, "must specify a device special file.");
 524                 }
 525         } else {
 526                 statb.st_rdev = NODEV;
 527         }
 528         *val = (char*) &statb.st_rdev;
 529         *size = sizeof statb.st_rdev;
 530 }
 531
 532 static int
 533 set_IK(const char *str, int *val)
 534 {
 535         float temp;
 536         int len, kelv;
 537         const char *p;
 538         char *endptr;
 539
 540         if ((len = strlen(str)) == 0)
 541                 return (0);
 542         p = &str[len - 1];
 543         if (*p == 'C' || *p == 'F') {
 544                 temp = strtof(str, &endptr);
 545                 if (endptr == str || endptr != p)
 546                         return 0;
 547                 if (*p == 'F')
 548                         temp = (temp - 32) * 5 / 9;
 549                 kelv = temp * 10 + 2732;
 550         } else {
 551                 /*
 552                  * I would like to just use, 0 but it would make numbers
 553                  * like '023' which were interpreted as decimal before
 554                  * suddenly interpreted as octal.
 555                  */
 556                 if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
 557                         kelv = (int)strtol(str, &endptr, 0);
 558                 else
 559                         kelv = (int)strtol(str, &endptr, 10);
 560                 if (endptr == str || *endptr != '\0')
 561                         return 0;
 562         }
 563         *val = kelv;
 564         return 1;
 565 }
 566
 567 /*
 568  * These functions uses a presently undocumented interface to the kernel
 569  * to walk the tree and get the type so it can print the value.
 570  * This interface is under work and consideration, and should probably
 571  * be killed with a big axe by the first person who can find the time.
 572  * (be aware though, that the proper interface isn't as obvious as it
 573  * may seem, there are various conflicting requirements.
 574  */
 575
 576 static int
 577 oidfmt(int *oid, size_t len, char *fmt, u_int *kind)
 578 {
 579         int qoid[CTL_MAXNAME+2];
 580         u_char buf[BUFSIZ];
 581         int i;
 582         size_t j;
 583
 584         qoid[0] = 0;
 585         qoid[1] = 4;
 586         memcpy(qoid + 2, oid, len * sizeof(int));
 587
 588         j = sizeof(buf);
 589         i = sysctl(qoid, len + 2, buf, &j, 0, 0);
 590         if (i)
 591                 err(1, "sysctl fmt %d %zu %d", i, j, errno);
 592
 593         if (kind)
 594                 *kind = *(u_int *)buf;
 595
 596         if (fmt)
 597                 strcpy(fmt, (char *)(buf + sizeof(u_int)));
 598         return 0;
 599 }
 600
 601 #ifdef __i386__
 602 /*
 603  * Code to map a bootdev major number into a suitable device name.
 604  * Major numbers are mapped into names as in boot2.c
 605  */
 606 struct _foo {
 607         int majdev;
 608         const char *name;
 609 } maj2name[] = {
 610         { 30,   "ad" },
 611         { 0,    "wd" },
 612         { 1,    "wfd" },
 613         { 2,    "fd" },
 614         { 4,    "da" },
 615         { -1,   NULL }  /* terminator */
 616 };
 617
 618 static int
 619 machdep_bootdev(u_long value)
 620 {
 621         int majdev, unit, slice, part;
 622         struct _foo *p;
 623
 624         if ((value & B_MAGICMASK) != B_DEVMAGIC) {
 625                 printf("invalid (0x%08lx)", value);
 626                 return 0;
 627         }
 628         majdev = B_TYPE(value);
 629         unit = B_UNIT(value);
 630         slice = B_SLICE(value);
 631         part = B_PARTITION(value);
 632         if (majdev == 2) {      /* floppy, as known to the boot block... */
 633                 printf("/dev/fd%d", unit);
 634                 return 0;
 635         }
 636         for (p = maj2name; p->name != NULL && p->majdev != majdev ; p++) ;
 637         if (p->name != NULL) {  /* found */
 638                 if (slice == WHOLE_DISK_SLICE)
 639                         printf("/dev/%s%d%c", p->name, unit, part);
 640                 else
 641                         printf("/dev/%s%ds%d%c",
 642                             p->name, unit, slice - BASE_SLICE + 1, part + 'a');
 643         } else
 644                 printf("unknown (major %d unit %d slice %d part %d)",
 645                         majdev, unit, slice, part);
 646         return 0;
 647 }
 648 #endif
 649
 650 /*
 651  * This formats and outputs the value of one variable
 652  *
 653  * Returns zero if anything was actually output.
 654  * Returns one if didn't know what to do with this.
 655  * Return minus one if we had errors.
 656  */
 657
 658 static int
 659 show_var(int *oid, size_t nlen)
 660 {
 661         u_char buf[BUFSIZ], *val = NULL, *p, *nul;
 662         char name[BUFSIZ], *fmt;
 663         const char *sep, *spacer;
 664         int qoid[CTL_MAXNAME+2];
 665         int i;
 666         size_t j, len;
 667         u_int kind;
 668         int (*func)(int, void *);
 669         int error = 0;
 670
 671         qoid[0] = 0;
 672         memcpy(qoid + 2, oid, nlen * sizeof(int));
 673
 674         qoid[1] = 1;
 675         j = sizeof(name);
 676         i = sysctl(qoid, nlen + 2, name, &j, 0, 0);
 677         if (i || !j)
 678                 err(1, "sysctl name %d %zu %d", i, j, errno);
 679
 680         if (Nflag) {
 681                 printf("%s", name);
 682                 return (0);
 683         }
 684
 685         if (eflag)
 686                 sep = "=";
 687         else
 688                 sep = ": ";
 689
 690         if (dflag) {    /* just print description */
 691                 qoid[1] = 5;
 692                 j = sizeof(buf);
 693                 i = sysctl(qoid, nlen + 2, buf, &j, 0, 0);
 694                 if (!nflag)
 695                         printf("%s%s", name, sep);
 696                 printf("%s", buf);
 697                 return(0);
 698         }
 699         /* find an estimate of how much we need for this var */
 700         j = 0;
 701         i = sysctl(oid, nlen, 0, &j, 0, 0);
 702         j += j; /* we want to be sure :-) */
 703
 704         val = malloc(j + 1);
 705         if (val == NULL)
 706                 return (1);
 707
 708         len = j;
 709         i = sysctl(oid, nlen, val, &len, 0, 0);
 710         if (i || !len) {
 711                 error = 1;
 712                 goto done;
 713         }
 714
 715         if (bflag) {
 716                 fwrite(val, 1, len, stdout);
 717                 goto done;
 718         }
 719
 720         val[len] = '\0';
 721         fmt = buf;
 722         oidfmt(oid, nlen, fmt, &kind);
 723         p = val;
 724         switch (*fmt) {
 725         case 'A':
 726                 if (!nflag)
 727                         printf("%s%s", name, sep);
 728                 nul = memchr(p, '\0', len);
 729                 fwrite(p, nul == NULL ? (int)len : nul - p, 1, stdout);
 730                 return (0);
 731
 732         case 'I':
 733                 if (!nflag)
 734                         printf("%s%s", name, sep);
 735                 fmt++;
 736                 spacer = "";
 737                 while (len >= sizeof(int)) {
 738                         if(*fmt == 'U')
 739                                 printf("%s%u", spacer, *(unsigned int *)p);
 740                         else if (*fmt == 'K' && *(int *)p >= 0)
 741                                 printf("%s%.1fC", spacer, (*(int *)p - 2732) / 10.0);
 742                         else
 743                                 printf("%s%d", spacer, *(int *)p);
 744                         spacer = " ";
 745                         len -= sizeof(int);
 746                         p += sizeof(int);
 747                 }
 748                 goto done;
 749
 750         case 'L':
 751                 if (!nflag)
 752                         printf("%s%s", name, sep);
 753                 fmt++;
 754 #ifdef __i386__
 755                 if (!strcmp(name, "machdep.guessed_bootdev"))
 756                         return machdep_bootdev(*(unsigned long *)p);
 757 #endif
 758                 spacer = "";
 759                 while (len >= sizeof(long)) {
 760                         if(*fmt == 'U')
 761                                 printf("%s%lu", spacer, *(unsigned long *)p);
 762                         else
 763                                 printf("%s%ld", spacer, *(long *)p);
 764                         spacer = " ";
 765                         len -= sizeof(long);
 766                         p += sizeof(long);
 767                 }
 768                 goto done;
 769
 770         case 'P':
 771                 if (!nflag)
 772                         printf("%s%s", name, sep);
 773                 printf("%p", *(void **)p);
 774                 goto done;
 775
 776         case 'Q':
 777                 if (!nflag)
 778                         printf("%s%s", name, sep);
 779                 fmt++;
 780                 spacer = "";
 781                 while (len >= sizeof(quad_t)) {
 782                         if(*fmt == 'U') {
 783                                 printf("%s%ju",
 784                                        spacer, (uintmax_t)*(u_quad_t *)p);
 785                         } else {
 786                                 printf("%s%jd",
 787                                        spacer, (intmax_t)*(quad_t *)p);
 788                         }
 789                         spacer = " ";
 790                         len -= sizeof(int64_t);
 791                         p += sizeof(int64_t);
 792                 }
 793                 goto done;
 794
 795         case 'T':
 796         case 'S':
 797                 if (!oflag && !xflag) {
 798                         i = 0;
 799                         if (strcmp(fmt, "S,clockinfo") == 0)
 800                                 func = S_clockinfo;
 801                         else if (strcmp(fmt, "S,timespec") == 0)
 802                                 func = S_timespec;
 803                         else if (strcmp(fmt, "S,timeval") == 0)
 804                                 func = S_timeval;
 805                         else if (strcmp(fmt, "S,loadavg") == 0)
 806                                 func = S_loadavg;
 807                         else if (strcmp(fmt, "S,sensor") == 0)
 808                                 func = S_sensor;
 809                         else if (strcmp(fmt, "T,dev_t") == 0)
 810                                 func = T_dev_t;
 811                         else if (strcmp(fmt, "T,udev_t") == 0)
 812                                 func = T_dev_t;
 813                         else
 814                                 func = NULL;
 815                         if (func) {
 816                                 if (!nflag)
 817                                         printf("%s%s", name, sep);
 818                                 error = (*func)(len, p);
 819                                 goto done;
 820                         }
 821                 }
 822                 /* FALL THROUGH */
 823         default:
 824                 if (!oflag && !xflag) {
 825                         error = 1;
 826                         goto done;
 827                 }
 828                 if (!nflag)
 829                         printf("%s%s", name, sep);
 830                 printf("Format:%s Length:%zu Dump:0x", fmt, len);
 831                 while (len-- && (xflag || p < val + 16))
 832                         printf("%02x", *p++);
 833                 if (!xflag && len > 16)
 834                         printf("...");
 835                 goto done;
 836         }
 837
 838 done:
 839         if (val != NULL)
 840                 free(val);
 841         return (error);
 842 }
 843
 844 static int
 845 sysctl_all(int *oid, size_t len)
 846 {
 847         int name1[22], name2[22];
 848         int retval;
 849         size_t i, l1, l2;
 850
 851         name1[0] = 0;
 852         name1[1] = 2;
 853         l1 = 2;
 854         if (len) {
 855                 memcpy(name1+2, oid, len * sizeof(int));
 856                 l1 += len;
 857         } else {
 858                 name1[2] = 1;
 859                 l1++;
 860         }
 861         for (;;) {
 862                 l2 = sizeof(name2);
 863                 retval = sysctl(name1, l1, name2, &l2, 0, 0);
 864                 if (retval < 0) {
 865                         if (errno == ENOENT)
 866                                 return 0;
 867                         else
 868                                 err(1, "sysctl(getnext) %d %zu", retval, l2);
 869                 }
 870
 871                 l2 /= sizeof(int);
 872
 873                 if (l2 < len)
 874                         return 0;
 875
 876                 for (i = 0; i < len; i++)
 877                         if (name2[i] != oid[i])
 878                                 return 0;
 879
 880                 retval = show_var(name2, l2);
 881                 if (retval == 0 && !bflag)
 882                         putchar('\n');
 883
 884                 memcpy(name1+2, name2, l2 * sizeof(int));
 885                 l1 = 2 + l2;
 886         }
 887 }