sysctl.tproj/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  * 4. 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
  30 #include <sys/cdefs.h>
  31 #ifndef lint
  32 __unused static const char copyright[] =
  33 "@(#) Copyright (c) 1993\n\
  34         The Regents of the University of California.  All rights reserved.\n";
  35 #endif /* not lint */
  36
  37 #ifndef lint
  38 #if 0
  39 static char sccsid[] = "@(#)from: sysctl.c      8.1 (Berkeley) 6/6/93";
  40 #endif
  41 __unused static const char rcsid[] =
  42   "$FreeBSD$";
  43 #endif /* not lint */
  44
  45 #include <sys/param.h>
  46 #include <sys/time.h>
  47 #include <sys/resource.h>
  48 #include <sys/stat.h>
  49 #include <sys/sysctl.h>
  50 #ifdef __APPLE__
  51 #include <mach/machine/vm_param.h>
  52 #include <mach/machine/vm_types.h>
  53 #include <mach/mach_types.h>
  54 #else // !__APPLE__
  55 #include <sys/vmmeter.h>
  56 #endif // !__APPLE__
  57
  58 #include <ctype.h>
  59 #include <err.h>
  60 #include <errno.h>
  61 #include <inttypes.h>
  62 #include <locale.h>
  63 #ifdef __APPLE__
  64 #endif
  65 #include <stdio.h>
  66 #include <stdlib.h>
  67 #include <string.h>
  68 #include <unistd.h>
  69
  70 static int      aflag, bflag, dflag, eflag, hflag, iflag;
  71 static int      Nflag, nflag, oflag, qflag, xflag, warncount;
  72
  73 static int      oidfmt(int *, int, char *, u_int *);
  74 static void     parse(const char *);
  75 #ifdef __APPLE__
  76 static int      show_var(int *, int, int);
  77 #else
  78 static int      show_var(int *, int);
  79 #endif
  80 static int      sysctl_all(int *oid, int len);
  81 static int      name2oid(char *, int *);
  82
  83 #ifndef __APPLE__
  84 static int      set_IK(const char *, int *);
  85 #endif
  86
  87 #ifdef __APPLE__
  88 // Shims for FreeBSD source compatibility.
  89 #define CTLTYPE_UINT 0xa
  90 #define CTLTYPE_LONG 0xb
  91 #define CTLTYPE_ULONG 0xc
  92 #define CTLTYPE_S64 0xd
  93 #define CTLTYPE_U64 0xe
  94
  95 #define CTLFLAG_TUN 0
  96
  97 // Support for CTL_USER
  98 const struct ctlname names[] = CTL_NAMES;
  99 const struct ctlname user_names[] = CTL_USER_NAMES;
 100 const int user_names_count = sizeof(user_names) / sizeof(*user_names);
 101 #endif
 102
 103 static void
 104 usage(void)
 105 {
 106
 107         (void)fprintf(stderr, "%s\n%s\n",
 108             "usage: sysctl [-bdehiNnoqx] name[=value] ...",
 109             "       sysctl [-bdehNnoqx] -a");
 110         exit(1);
 111 }
 112
 113 int
 114 main(int argc, char **argv)
 115 {
 116         int ch;
 117
 118         setlocale(LC_NUMERIC, "");
 119         setbuf(stdout,0);
 120         setbuf(stderr,0);
 121
 122         while ((ch = getopt(argc, argv, "AabdehiNnoqwxX")) != -1) {
 123                 switch (ch) {
 124                 case 'A':
 125                         /* compatibility */
 126                         aflag = oflag = 1;
 127                         break;
 128                 case 'a':
 129                         aflag = 1;
 130                         break;
 131                 case 'b':
 132                         bflag = 1;
 133                         break;
 134                 case 'd':
 135                         dflag = 1;
 136                         break;
 137                 case 'e':
 138                         eflag = 1;
 139                         break;
 140                 case 'h':
 141                         hflag = 1;
 142                         break;
 143                 case 'i':
 144                         iflag = 1;
 145                         break;
 146                 case 'N':
 147                         Nflag = 1;
 148                         break;
 149                 case 'n':
 150                         nflag = 1;
 151                         break;
 152                 case 'o':
 153                         oflag = 1;
 154                         break;
 155                 case 'q':
 156                         qflag = 1;
 157                         break;
 158                 case 'w':
 159                         /* compatibility */
 160                         /* ignored */
 161                         break;
 162                 case 'X':
 163                         /* compatibility */
 164                         aflag = xflag = 1;
 165                         break;
 166                 case 'x':
 167                         xflag = 1;
 168                         break;
 169                 default:
 170                         usage();
 171                 }
 172         }
 173         argc -= optind;
 174         argv += optind;
 175
 176         if (Nflag && nflag)
 177                 usage();
 178         if (aflag && argc == 0)
 179                 exit(sysctl_all(0, 0));
 180         if (argc == 0)
 181                 usage();
 182
 183         warncount = 0;
 184         while (argc-- > 0)
 185                 parse(*argv++);
 186         exit(warncount);
 187 }
 188
 189 /*
 190  * Parse a name into a MIB entry.
 191  * Lookup and print out the MIB entry if it exists.
 192  * Set a new value if requested.
 193  */
 194 static void
 195 parse(const char *string)
 196 {
 197         int len, i, j;
 198         void *newval = 0;
 199         int intval;
 200         unsigned int uintval;
 201         long longval;
 202         unsigned long ulongval;
 203         size_t newsize = 0;
 204         int64_t i64val;
 205         uint64_t u64val;
 206         int mib[CTL_MAXNAME];
 207         char *cp, *bufp, buf[BUFSIZ], *endptr, fmt[BUFSIZ];
 208         u_int kind;
 209
 210         cp = buf;
 211         if (snprintf(buf, BUFSIZ, "%s", string) >= BUFSIZ)
 212                 errx(1, "oid too long: '%s'", string);
 213         bufp = strsep(&cp, "=");
 214         if (cp != NULL) {
 215                 while (isspace(*cp))
 216                         cp++;
 217                 newval = cp;
 218                 newsize = strlen(cp);
 219         }
 220         len = name2oid(bufp, mib);
 221
 222         if (len < 0) {
 223                 if (iflag)
 224                         return;
 225                 if (qflag)
 226                         exit(1);
 227                 else
 228                         errx(1, "unknown oid '%s'", bufp);
 229         }
 230
 231         if (oidfmt(mib, len, fmt, &kind))
 232                 err(1, "couldn't find format of oid '%s'", bufp);
 233
 234         if (newval == NULL || dflag) {
 235                 if ((kind & CTLTYPE) == CTLTYPE_NODE) {
 236                         if (dflag) {
 237 #ifdef __APPLE__
 238                                 i = show_var(mib, len, 1);
 239 #else
 240                                 i = show_var(mib, len);
 241 #endif
 242                                 if (!i && !bflag)
 243                                         putchar('\n');
 244                         }
 245                         sysctl_all(mib, len);
 246                 } else {
 247 #ifdef __APPLE__
 248                         i = show_var(mib, len, 1);
 249 #else
 250                         i = show_var(mib, len);
 251 #endif
 252                         if (!i && !bflag)
 253                                 putchar('\n');
 254                 }
 255         } else {
 256                 if ((kind & CTLTYPE) == CTLTYPE_NODE)
 257                         errx(1, "oid '%s' isn't a leaf node", bufp);
 258
 259                 if (!(kind & CTLFLAG_WR)) {
 260                         if (kind & CTLFLAG_TUN) {
 261                                 warnx("oid '%s' is a read only tunable", bufp);
 262                                 errx(1, "Tunable values are set in /boot/loader.conf");
 263                         } else {
 264                                 errx(1, "oid '%s' is read only", bufp);
 265                         }
 266                 }
 267
 268                 if ((kind & CTLTYPE) == CTLTYPE_INT ||
 269                     (kind & CTLTYPE) == CTLTYPE_UINT ||
 270                     (kind & CTLTYPE) == CTLTYPE_LONG ||
 271                     (kind & CTLTYPE) == CTLTYPE_ULONG ||
 272                     (kind & CTLTYPE) == CTLTYPE_S64 ||
 273                     (kind & CTLTYPE) == CTLTYPE_U64) {
 274                         if (strlen(newval) == 0)
 275                                 errx(1, "empty numeric value");
 276                 }
 277
 278                 switch (kind & CTLTYPE) {
 279                         case CTLTYPE_INT:
 280                                 if (strcmp(fmt, "IK") == 0) {
 281 #ifndef __APPLE__
 282                                         if (!set_IK(newval, &intval))
 283 #endif
 284                                                 errx(1, "invalid value '%s'",
 285                                                     (char *)newval);
 286                                 } else {
 287                                         intval = (int)strtol(newval, &endptr,
 288                                             0);
 289                                         if (endptr == newval || *endptr != '\0')
 290                                                 errx(1, "invalid integer '%s'",
 291                                                     (char *)newval);
 292                                 }
 293                                 newval = &intval;
 294                                 newsize = sizeof(intval);
 295                                 break;
 296                         case CTLTYPE_UINT:
 297                                 uintval = (int) strtoul(newval, &endptr, 0);
 298                                 if (endptr == newval || *endptr != '\0')
 299                                         errx(1, "invalid unsigned integer '%s'",
 300                                             (char *)newval);
 301                                 newval = &uintval;
 302                                 newsize = sizeof(uintval);
 303                                 break;
 304                         case CTLTYPE_LONG:
 305                                 longval = strtol(newval, &endptr, 0);
 306                                 if (endptr == newval || *endptr != '\0')
 307                                         errx(1, "invalid long integer '%s'",
 308                                             (char *)newval);
 309                                 newval = &longval;
 310                                 newsize = sizeof(longval);
 311                                 break;
 312                         case CTLTYPE_ULONG:
 313                                 ulongval = strtoul(newval, &endptr, 0);
 314                                 if (endptr == newval || *endptr != '\0')
 315                                         errx(1, "invalid unsigned long integer"
 316                                             " '%s'", (char *)newval);
 317                                 newval = &ulongval;
 318                                 newsize = sizeof(ulongval);
 319                                 break;
 320                         case CTLTYPE_STRING:
 321                                 break;
 322                         case CTLTYPE_S64:
 323                                 i64val = strtoimax(newval, &endptr, 0);
 324                                 if (endptr == newval || *endptr != '\0')
 325                                         errx(1, "invalid int64_t '%s'",
 326                                             (char *)newval);
 327                                 newval = &i64val;
 328                                 newsize = sizeof(i64val);
 329                                 break;
 330                         case CTLTYPE_U64:
 331                                 u64val = strtoumax(newval, &endptr, 0);
 332                                 if (endptr == newval || *endptr != '\0')
 333                                         errx(1, "invalid uint64_t '%s'",
 334                                             (char *)newval);
 335                                 newval = &u64val;
 336                                 newsize = sizeof(u64val);
 337                                 break;
 338                         case CTLTYPE_OPAQUE:
 339                                 /* FALLTHROUGH */
 340                         default:
 341                                 errx(1, "oid '%s' is type %d,"
 342                                         " cannot set that", bufp,
 343                                         kind & CTLTYPE);
 344                 }
 345
 346 #ifdef __APPLE__
 347                 i = show_var(mib, len, 1);
 348 #else
 349                 i = show_var(mib, len);
 350 #endif
 351                 if (sysctl(mib, len, 0, 0, newval, newsize) == -1) {
 352                         if (!i && !bflag)
 353                                 putchar('\n');
 354                         switch (errno) {
 355 #ifdef __APPLE__
 356                         case ENOTSUP:
 357 #endif // __APPLE__
 358                         case EOPNOTSUPP:
 359                                 errx(1, "%s: value is not available",
 360                                         string);
 361                         case ENOTDIR:
 362                                 errx(1, "%s: specification is incomplete",
 363                                         string);
 364                         case ENOMEM:
 365                                 errx(1, "%s: type is unknown to this program",
 366                                         string);
 367                         default:
 368                                 warn("%s", string);
 369                                 warncount++;
 370                                 return;
 371                         }
 372                 }
 373                 if (!bflag)
 374                         printf(" -> ");
 375                 i = nflag;
 376                 nflag = 1;
 377 #ifdef __APPLE__
 378                 j = show_var(mib, len, 1);
 379 #else
 380                 j = show_var(mib, len);
 381 #endif
 382                 if (!j && !bflag)
 383                         putchar('\n');
 384                 nflag = i;
 385         }
 386 }
 387
 388 /* These functions will dump out various interesting structures. */
 389
 390 static int
 391 S_clockinfo(int l2, void *p)
 392 {
 393         struct clockinfo *ci = (struct clockinfo*)p;
 394
 395         if (l2 != sizeof(*ci)) {
 396                 warnx("S_clockinfo %d != %zu", l2, sizeof(*ci));
 397                 return (1);
 398         }
 399 #ifdef __APPLE__
 400         printf(hflag ? "{ hz = %'d, tick = %'d, tickadj = %'d, profhz = %'d, stathz = %'d }" :
 401                "{ hz = %d, tick = %d, tickadj = %d, profhz = %d, stathz = %d }",
 402                ci->hz, ci->tick, ci->tickadj, ci->profhz, ci->stathz);
 403 #else
 404         printf(hflag ? "{ hz = %'d, tick = %'d, profhz = %'d, stathz = %'d }" :
 405                 "{ hz = %d, tick = %d, profhz = %d, stathz = %d }",
 406                 ci->hz, ci->tick, ci->profhz, ci->stathz);
 407 #endif
 408         return (0);
 409 }
 410
 411 static int
 412 S_loadavg(int l2, void *p)
 413 {
 414         struct loadavg *tv = (struct loadavg*)p;
 415
 416         if (l2 != sizeof(*tv)) {
 417                 warnx("S_loadavg %d != %zu", l2, sizeof(*tv));
 418                 return (1);
 419         }
 420         printf(hflag ? "{ %'.2f %'.2f %'.2f }" : "{ %.2f %.2f %.2f }",
 421                 (double)tv->ldavg[0]/(double)tv->fscale,
 422                 (double)tv->ldavg[1]/(double)tv->fscale,
 423                 (double)tv->ldavg[2]/(double)tv->fscale);
 424         return (0);
 425 }
 426
 427 static int
 428 S_timeval(int l2, void *p)
 429 {
 430         struct timeval *tv = (struct timeval*)p;
 431         time_t tv_sec;
 432         char *p1, *p2;
 433
 434         if (l2 != sizeof(*tv)) {
 435                 warnx("S_timeval %d != %zu", l2, sizeof(*tv));
 436                 return (1);
 437         }
 438         printf(hflag ? "{ sec = %'jd, usec = %'ld } " :
 439                 "{ sec = %jd, usec = %ld } ",
 440                 (intmax_t)tv->tv_sec, (long)tv->tv_usec);
 441         tv_sec = tv->tv_sec;
 442         p1 = strdup(ctime(&tv_sec));
 443         for (p2=p1; *p2 ; p2++)
 444                 if (*p2 == '\n')
 445                         *p2 = '\0';
 446         fputs(p1, stdout);
 447         free(p1);
 448         return (0);
 449 }
 450
 451 #ifndef __APPLE__
 452 static int
 453 S_vmtotal(int l2, void *p)
 454 {
 455         struct vmtotal *v = (struct vmtotal *)p;
 456         int pageKilo = getpagesize() / 1024;
 457
 458         if (l2 != sizeof(*v)) {
 459                 warnx("S_vmtotal %d != %zu", l2, sizeof(*v));
 460                 return (1);
 461         }
 462
 463         printf(
 464             "\nSystem wide totals computed every five seconds:"
 465             " (values in kilobytes)\n");
 466         printf("===============================================\n");
 467         printf(
 468             "Processes:\t\t(RUNQ: %hd Disk Wait: %hd Page Wait: "
 469             "%hd Sleep: %hd)\n",
 470             v->t_rq, v->t_dw, v->t_pw, v->t_sl);
 471         printf(
 472             "Virtual Memory:\t\t(Total: %dK Active: %dK)\n",
 473             v->t_vm * pageKilo, v->t_avm * pageKilo);
 474         printf("Real Memory:\t\t(Total: %dK Active: %dK)\n",
 475             v->t_rm * pageKilo, v->t_arm * pageKilo);
 476         printf("Shared Virtual Memory:\t(Total: %dK Active: %dK)\n",
 477             v->t_vmshr * pageKilo, v->t_avmshr * pageKilo);
 478         printf("Shared Real Memory:\t(Total: %dK Active: %dK)\n",
 479             v->t_rmshr * pageKilo, v->t_armshr * pageKilo);
 480         printf("Free Memory:\t%dK\n", v->t_free * pageKilo);
 481
 482         return (0);
 483 }
 484
 485 static int
 486 set_IK(const char *str, int *val)
 487 {
 488         float temp;
 489         int len, kelv;
 490         const char *p;
 491         char *endptr;
 492
 493         if ((len = strlen(str)) == 0)
 494                 return (0);
 495         p = &str[len - 1];
 496         if (*p == 'C' || *p == 'F') {
 497                 temp = strtof(str, &endptr);
 498                 if (endptr == str || endptr != p)
 499                         return (0);
 500                 if (*p == 'F')
 501                         temp = (temp - 32) * 5 / 9;
 502                 kelv = temp * 10 + 2732;
 503         } else {
 504                 kelv = (int)strtol(str, &endptr, 10);
 505                 if (endptr == str || *endptr != '\0')
 506                         return (0);
 507         }
 508         *val = kelv;
 509         return (1);
 510 }
 511 #endif // !__APPLE__
 512
 513 #ifdef __APPLE__
 514 static int
 515 S_xswusage(int l2, void *p)
 516 {
 517         struct xsw_usage *xsu = (struct xsw_usage *)p;
 518
 519         if (l2 != sizeof(*xsu)) {
 520                 warnx("S_xswusage %d != %ld", l2, sizeof(*xsu));
 521                 return (1);
 522         }
 523         fprintf(stdout,
 524                 "total = %.2fM  used = %.2fM  free = %.2fM  %s",
 525                 ((double)xsu->xsu_total) / (1024.0 * 1024.0),
 526                 ((double)xsu->xsu_used) / (1024.0 * 1024.0),
 527                 ((double)xsu->xsu_avail) / (1024.0 * 1024.0),
 528                 xsu->xsu_encrypted ? "(encrypted)" : "");
 529         return (0);
 530 }
 531
 532 static int
 533 T_dev_t(int l2, void *p)
 534 {
 535         dev_t *d = (dev_t *)p;
 536
 537         if (l2 != sizeof(*d)) {
 538                 warnx("T_dev_T %d != %ld", l2, sizeof(*d));
 539                 return (1);
 540         }
 541         if ((int)(*d) != -1) {
 542                 if (minor(*d) > 255 || minor(*d) < 0)
 543                         printf("{ major = %d, minor = 0x%x }",
 544                                 major(*d), minor(*d));
 545                 else
 546                         printf("{ major = %d, minor = %d }",
 547                                 major(*d), minor(*d));
 548         }
 549         return (0);
 550 }
 551
 552 static int
 553 S_quads(int len, void *p)
 554 {
 555         size_t size = sizeof(int64_t);
 556         if (len & (size-1)) {
 557                 return 1;
 558         }
 559         while (len > 0) {
 560                 int64_t i = *(int64_t *)p;
 561                 printf("%llu", i);
 562                 if (len > size) {
 563                         len -= size;
 564                         p = (uintptr_t)p + size;
 565                         printf(" ");
 566                 } else {
 567                         break;
 568                 }
 569         }
 570         return 0;
 571 }
 572 #endif // __APPLE__
 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 name2oid(char *name, int *oidp)
 585 {
 586         int oid[2];
 587         int i;
 588         size_t j;
 589
 590 #ifdef __APPLE__
 591         // Support for CTL_USER
 592         const char *user = names[CTL_USER].ctl_name;
 593         j = strlen(user);
 594         if (!strncmp(name, user, j)) {
 595                 oidp[0] = CTL_USER;
 596                 if (name[j] == '.') {
 597                         for (i = 1; i < user_names_count; ++i) {
 598                                 if (!strcmp(&name[j+1], user_names[i].ctl_name)) {
 599                                         oidp[1] = i;
 600                                         return 2;
 601                                 }
 602                         }
 603                         return -1;
 604                 } else if (name[j] == 0) {
 605                         return 1;
 606                 }
 607                 return -1;
 608         }
 609 #endif
 610
 611         oid[0] = 0;
 612         oid[1] = 3;
 613
 614         j = CTL_MAXNAME * sizeof(int);
 615         i = sysctl(oid, 2, oidp, &j, name, strlen(name));
 616         if (i < 0)
 617                 return (i);
 618         j /= sizeof(int);
 619         return (int)j;
 620 }
 621
 622 static int
 623 oidfmt(int *oid, int len, char *fmt, u_int *kind)
 624 {
 625         int qoid[CTL_MAXNAME+2];
 626         u_char buf[BUFSIZ];
 627         int i;
 628         size_t j;
 629
 630         qoid[0] = 0;
 631         qoid[1] = 4;
 632         memcpy(qoid + 2, oid, len * sizeof(int));
 633
 634         j = sizeof(buf);
 635         i = sysctl(qoid, len + 2, buf, &j, 0, 0);
 636 #ifdef __APPLE__
 637         if (i && errno == ENOENT) {
 638                 // Support for CTL_USER
 639                 if (oid[0] == CTL_USER) {
 640                         if (len == 1) {
 641                                 *kind = CTLTYPE_NODE;
 642                                 return 0;
 643                         } else if (len == 2 && oid[1] < user_names_count) {
 644                                 *kind = user_names[oid[1]].ctl_type;
 645                                 return 0;
 646                         }
 647                 }
 648                 return 1;
 649         }
 650 #endif
 651         if (i)
 652                 err(1, "sysctl fmt %d %zu %d", i, j, errno);
 653
 654         if (kind)
 655 #ifdef __APPLE__
 656                 memcpy(kind, buf, sizeof(*kind));
 657 #else
 658                 *kind = *(u_int *)buf;
 659 #endif
 660
 661         if (fmt)
 662                 strcpy(fmt, (char *)(buf + sizeof(u_int)));
 663
 664 #ifdef __APPLE__
 665         // Map Darwin sysctl types to FreeBSD types.
 666         // - 0 with "I" -> CTLTYPE_INT
 667         // - 0 with "S," -> CTLTYPE_STRUCT
 668         // - CTLTYPE_INT with "IU" -> CTLTYPE_UINT
 669         // - CTLTYPE_INT with "L" -> CTLTYPE_LONG
 670         // - CTLTYPE_QUAD -> CTLTYPE_S64
 671         // - CTLTYPE_QUAD with "*U" -> CTLTYPE_U64
 672         if (kind) {
 673                 switch (*kind & CTLTYPE) {
 674                         case 0:
 675                         case CTLTYPE_INT:
 676                                 if (buf[sizeof(u_int)] == 'S') {
 677                                         *kind = (*kind & ~CTLTYPE) | CTLTYPE_STRUCT;
 678                                 } else if (buf[sizeof(u_int)] == 'I') {
 679                                         *kind = (*kind & ~CTLTYPE) | CTLTYPE_INT;
 680                                         if (buf[sizeof(u_int)+1] == 'U') {
 681                                                 *kind = (*kind & ~CTLTYPE) | CTLTYPE_UINT;
 682                                         }
 683                                 } else if (buf[sizeof(u_int)] == 'L') {
 684                                         *kind = (*kind & ~CTLTYPE) | CTLTYPE_LONG;
 685                     if (buf[sizeof(u_int)+1] == 'U') {
 686                         *kind = (*kind & ~CTLTYPE) | CTLTYPE_ULONG;
 687                     }
 688                                 }
 689                                 break;
 690                         case CTLTYPE_QUAD:
 691                                 *kind = (*kind & ~CTLTYPE);
 692                                 if (fmt && strchr(fmt, 'U')) {
 693                                         *kind |= CTLTYPE_U64;
 694                                 } else {
 695                                         *kind |= CTLTYPE_S64;
 696                                 }
 697                                 break;
 698                 }
 699         }
 700 #endif
 701
 702         return (0);
 703 }
 704
 705 static int ctl_sign[CTLTYPE+1] = {
 706         [CTLTYPE_INT] = 1,
 707         [CTLTYPE_LONG] = 1,
 708         [CTLTYPE_S64] = 1,
 709 };
 710
 711 static int ctl_size[CTLTYPE+1] = {
 712         [CTLTYPE_INT] = sizeof(int),
 713         [CTLTYPE_UINT] = sizeof(u_int),
 714         [CTLTYPE_LONG] = sizeof(long),
 715         [CTLTYPE_ULONG] = sizeof(u_long),
 716         [CTLTYPE_S64] = sizeof(int64_t),
 717         [CTLTYPE_U64] = sizeof(int64_t),
 718 };
 719
 720 /*
 721  * This formats and outputs the value of one variable
 722  *
 723  * Returns zero if anything was actually output.
 724  * Returns one if didn't know what to do with this.
 725  * Return minus one if we had errors.
 726  */
 727 static int
 728 #ifdef __APPLE__
 729 show_var(int *oid, int nlen, int show_masked)
 730 #else
 731 show_var(int *oid, int nlen)
 732 #endif
 733 {
 734         u_char buf[BUFSIZ], *val, *oval, *p;
 735         char name[BUFSIZ], *fmt;
 736         const char *sep, *sep1;
 737         int qoid[CTL_MAXNAME+2];
 738         uintmax_t umv;
 739         intmax_t mv;
 740         int i, hexlen, sign, ctltype;
 741         size_t intlen;
 742         size_t j, len;
 743         u_int kind;
 744         int (*func)(int, void *);
 745
 746         /* Silence GCC. */
 747         umv = mv = intlen = 0;
 748
 749         bzero(buf, BUFSIZ);
 750         bzero(name, BUFSIZ);
 751         qoid[0] = 0;
 752         memcpy(qoid + 2, oid, nlen * sizeof(int));
 753         fmt = (char *)buf;
 754         oidfmt(oid, nlen, fmt, &kind);
 755
 756 #ifdef __APPLE__
 757         if (!show_masked && (kind & CTLFLAG_MASKED)) {
 758                 return (1);
 759         }
 760 #endif
 761
 762 #ifdef __APPLE__
 763         // Support for CTL_USER
 764         if (nlen >= 1 && oid[0] == CTL_USER) {
 765                 const char *user_name = "";
 766                 sep = "";
 767                 i = oid[1];
 768                 if (nlen == 2 && i > 0 && i < user_names_count) {
 769                         user_name = user_names[i].ctl_name;
 770                         sep = ".";
 771                 }
 772                 j = snprintf(name, sizeof(name), "%s%s%s",
 773                              names[CTL_USER].ctl_name, sep, user_name);
 774                 i = 0;
 775         } else {
 776 #endif
 777         qoid[1] = 1;
 778         j = sizeof(name);
 779         i = sysctl(qoid, nlen + 2, name, &j, 0, 0);
 780         if (i || !j)
 781                 err(1, "sysctl name %d %zu %d", i, j, errno);
 782 #ifdef __APPLE__
 783         }
 784 #endif
 785
 786         if (Nflag) {
 787                 printf("%s", name);
 788                 return (0);
 789         }
 790
 791         if (eflag)
 792                 sep = "=";
 793         else
 794                 sep = ": ";
 795
 796         if (dflag) {    /* just print description */
 797                 qoid[1] = 5;
 798                 j = sizeof(buf);
 799                 i = sysctl(qoid, nlen + 2, buf, &j, 0, 0);
 800                 if (!nflag)
 801                         printf("%s%s", name, sep);
 802                 printf("%s", buf);
 803                 return (0);
 804         }
 805         /* find an estimate of how much we need for this var */
 806         j = 0;
 807         i = sysctl(oid, nlen, 0, &j, 0, 0);
 808         j += j; /* we want to be sure :-) */
 809
 810         val = oval = malloc(j + 1);
 811         if (val == NULL) {
 812                 warnx("malloc failed");
 813                 return (1);
 814         }
 815         len = j;
 816         i = sysctl(oid, nlen, val, &len, 0, 0);
 817         if (i || !len) {
 818                 free(oval);
 819                 return (1);
 820         }
 821
 822         if (bflag) {
 823                 fwrite(val, 1, len, stdout);
 824                 free(oval);
 825                 return (0);
 826         }
 827         val[len] = '\0';
 828         p = val;
 829         ctltype = (kind & CTLTYPE);
 830         sign = ctl_sign[ctltype];
 831         intlen = ctl_size[ctltype];
 832
 833         switch (ctltype) {
 834         case CTLTYPE_STRING:
 835                 if (!nflag)
 836                         printf("%s%s", name, sep);
 837                 printf("%.*s", (int)len, p);
 838                 free(oval);
 839                 return (0);
 840
 841         case CTLTYPE_INT:
 842         case CTLTYPE_UINT:
 843         case CTLTYPE_LONG:
 844         case CTLTYPE_ULONG:
 845         case CTLTYPE_S64:
 846         case CTLTYPE_U64:
 847                 if (!nflag)
 848                         printf("%s%s", name, sep);
 849                 hexlen = (int)(2 + (intlen * CHAR_BIT + 3) / 4);
 850                 sep1 = "";
 851                 while (len >= intlen) {
 852                         switch (kind & CTLTYPE) {
 853                         case CTLTYPE_INT:
 854                         case CTLTYPE_UINT:
 855                                 umv = *(u_int *)(void *)p;
 856                                 mv = *(int *)(void *)p;
 857                                 break;
 858                         case CTLTYPE_LONG:
 859                         case CTLTYPE_ULONG:
 860                                 umv = *(u_long *)(void *)p;
 861                                 mv = *(long *)(void *)p;
 862                                 break;
 863                         case CTLTYPE_S64:
 864                         case CTLTYPE_U64:
 865                                 umv = *(uint64_t *)(void *)p;
 866                                 mv = *(int64_t *)(void *)p;
 867                                 break;
 868                         }
 869                         fputs(sep1, stdout);
 870                         if (xflag)
 871                                 printf("%#0*jx", hexlen, umv);
 872                         else if (!sign)
 873                                 printf(hflag ? "%'ju" : "%ju", umv);
 874                         else if (fmt[1] == 'K') {
 875                                 if (mv < 0)
 876                                         printf("%jd", mv);
 877                                 else
 878                                         printf("%.1fC", (mv - 2732.0) / 10);
 879                         } else
 880                                 printf(hflag ? "%'jd" : "%jd", mv);
 881                         sep1 = " ";
 882                         len -= intlen;
 883                         p += intlen;
 884                 }
 885                 free(oval);
 886                 return (0);
 887
 888         case CTLTYPE_OPAQUE:
 889                 i = 0;
 890                 if (strcmp(fmt, "S,clockinfo") == 0)
 891                         func = S_clockinfo;
 892                 else if (strcmp(fmt, "S,timeval") == 0)
 893                         func = S_timeval;
 894                 else if (strcmp(fmt, "S,loadavg") == 0)
 895                         func = S_loadavg;
 896 #ifdef __APPLE__
 897                 else if (!strcmp(fmt, "S,xsw_usage"))
 898                         func = S_xswusage;
 899                 else if (!strcmp(fmt, "T,dev_t"))
 900                         func = T_dev_t;
 901                 else if (!strcmp(fmt, "Q"))
 902                         func = S_quads;
 903 #else // !__APPLE__
 904                 else if (strcmp(fmt, "S,vmtotal") == 0)
 905                         func = S_vmtotal;
 906 #endif // !__APPLE__
 907                 else
 908                         func = NULL;
 909                 if (func) {
 910                         if (!nflag)
 911                                 printf("%s%s", name, sep);
 912                         i = (*func)((int)len, p);
 913                         free(oval);
 914                         return (i);
 915                 }
 916                 /* FALLTHROUGH */
 917         default:
 918                 if (!oflag && !xflag) {
 919                         free(oval);
 920                         return (1);
 921                 }
 922                 if (!nflag)
 923                         printf("%s%s", name, sep);
 924                 printf("Format:%s Length:%zu Dump:0x", fmt, len);
 925                 while (len-- && (xflag || p < val + 16))
 926                         printf("%02x", *p++);
 927                 if (!xflag && len > 16)
 928                         printf("...");
 929                 free(oval);
 930                 return (0);
 931         }
 932         free(oval);
 933         return (1);
 934 }
 935
 936 #ifdef __APPLE__
 937 // Support for CTL_USER
 938 static void
 939 sysctl_all_user(int *oid, int len)
 940 {
 941         int i, j;
 942         if (len > 1 || (len == 1 && oid[0] != CTL_USER)) {
 943                 return;
 944         }
 945         for (i = 0; i < user_names_count; ++i) {
 946                 int oid[2] = { CTL_USER, i };
 947                 j = show_var(oid, 2, 0);
 948                 if (!j && !bflag) {
 949                         putchar('\n');
 950                 }
 951         }
 952 }
 953 #endif
 954
 955 static int
 956 sysctl_all(int *oid, int len)
 957 {
 958 #ifdef __APPLE__
 959 #endif
 960
 961         int name1[22], name2[22];
 962         int i, j;
 963         size_t l1, l2;
 964
 965 #ifdef __APPLE__
 966         sysctl_all_user(oid, len);
 967 #endif
 968
 969         name1[0] = 0;
 970         name1[1] = 2;
 971         l1 = 2;
 972         if (len) {
 973                 memcpy(name1+2, oid, len * sizeof(int));
 974                 l1 += len;
 975         } else {
 976                 name1[2] = 1;
 977                 l1++;
 978         }
 979         for (;;) {
 980                 l2 = sizeof(name2);
 981                 j = sysctl(name1, (u_int)l1, name2, &l2, 0, 0);
 982                 if (j < 0) {
 983                         if (errno == ENOENT)
 984                                 return (0);
 985                         else
 986                                 err(1, "sysctl(getnext) %d %zu", j, l2);
 987                 }
 988
 989                 l2 /= sizeof(int);
 990
 991                 if (len < 0 || l2 < (unsigned int)len)
 992                         return (0);
 993
 994                 for (i = 0; i < len; i++)
 995                         if (name2[i] != oid[i])
 996                                 return (0);
 997
 998 #ifdef __APPLE__
 999                 i = show_var(name2, (u_int)l2, 0);
1000 #else
1001                 i = show_var(name2, (u_int)l2);
1002 #endif
1003                 if (!i && !bflag)
1004                         putchar('\n');
1005
1006                 memcpy(name1+2, name2, l2 * sizeof(int));
1007                 l1 = 2 + l2;
1008         }
1009 }