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 #include <stdio.h>
  64 #include <stdlib.h>
  65 #include <string.h>
  66 #include <unistd.h>
  67
  68 static int      aflag, bflag, dflag, eflag, hflag, iflag;
  69 static int      Nflag, nflag, oflag, qflag, xflag, warncount;
  70
  71 static int      oidfmt(int *, int, char *, u_int *);
  72 static void     parse(const char *);
  73 #ifdef __APPLE__
  74 static int      show_var(int *, int, int);
  75 #else
  76 static int      show_var(int *, int);
  77 #endif
  78 static int      sysctl_all(int *oid, int len);
  79 static int      name2oid(char *, int *);
  80
  81 #ifndef __APPLE__
  82 static int      set_IK(const char *, int *);
  83 #endif
  84
  85 #ifdef __APPLE__
  86 // Shims for FreeBSD source compatibility.
  87 #define CTLTYPE_UINT 0xa
  88 #define CTLTYPE_LONG 0xb
  89 #define CTLTYPE_ULONG 0xc
  90 #define CTLTYPE_S64 0xd
  91 #define CTLTYPE_U64 0xe
  92
  93 #define CTLFLAG_TUN 0
  94
  95 // Support for CTL_USER
  96 const struct ctlname names[] = CTL_NAMES;
  97 const struct ctlname user_names[] = CTL_USER_NAMES;
  98 const int user_names_count = sizeof(user_names) / sizeof(*user_names);
  99 #endif
 100
 101 static void
 102 usage(void)
 103 {
 104
 105         (void)fprintf(stderr, "%s\n%s\n",
 106             "usage: sysctl [-bdehiNnoqx] name[=value] ...",
 107             "       sysctl [-bdehNnoqx] -a");
 108         exit(1);
 109 }
 110
 111 int
 112 main(int argc, char **argv)
 113 {
 114         int ch;
 115
 116         setlocale(LC_NUMERIC, "");
 117         setbuf(stdout,0);
 118         setbuf(stderr,0);
 119
 120         while ((ch = getopt(argc, argv, "AabdehiNnoqwxX")) != -1) {
 121                 switch (ch) {
 122                 case 'A':
 123                         /* compatibility */
 124                         aflag = oflag = 1;
 125                         break;
 126                 case 'a':
 127                         aflag = 1;
 128                         break;
 129                 case 'b':
 130                         bflag = 1;
 131                         break;
 132                 case 'd':
 133                         dflag = 1;
 134                         break;
 135                 case 'e':
 136                         eflag = 1;
 137                         break;
 138                 case 'h':
 139                         hflag = 1;
 140                         break;
 141                 case 'i':
 142                         iflag = 1;
 143                         break;
 144                 case 'N':
 145                         Nflag = 1;
 146                         break;
 147                 case 'n':
 148                         nflag = 1;
 149                         break;
 150                 case 'o':
 151                         oflag = 1;
 152                         break;
 153                 case 'q':
 154                         qflag = 1;
 155                         break;
 156                 case 'w':
 157                         /* compatibility */
 158                         /* ignored */
 159                         break;
 160                 case 'X':
 161                         /* compatibility */
 162                         aflag = xflag = 1;
 163                         break;
 164                 case 'x':
 165                         xflag = 1;
 166                         break;
 167                 default:
 168                         usage();
 169                 }
 170         }
 171         argc -= optind;
 172         argv += optind;
 173
 174         if (Nflag && nflag)
 175                 usage();
 176         if (aflag && argc == 0)
 177                 exit(sysctl_all(0, 0));
 178         if (argc == 0)
 179                 usage();
 180
 181         warncount = 0;
 182         while (argc-- > 0)
 183                 parse(*argv++);
 184         exit(warncount);
 185 }
 186
 187 /*
 188  * Parse a name into a MIB entry.
 189  * Lookup and print out the MIB entry if it exists.
 190  * Set a new value if requested.
 191  */
 192 static void
 193 parse(const char *string)
 194 {
 195         int len, i, j;
 196         void *newval = 0;
 197         int intval;
 198         unsigned int uintval;
 199         long longval;
 200         unsigned long ulongval;
 201         size_t newsize = 0;
 202         int64_t i64val;
 203         uint64_t u64val;
 204         int mib[CTL_MAXNAME];
 205         char *cp, *bufp, buf[BUFSIZ], *endptr, fmt[BUFSIZ];
 206         u_int kind;
 207
 208         cp = buf;
 209         if (snprintf(buf, BUFSIZ, "%s", string) >= BUFSIZ)
 210                 errx(1, "oid too long: '%s'", string);
 211         bufp = strsep(&cp, "=");
 212         if (cp != NULL) {
 213                 while (isspace(*cp))
 214                         cp++;
 215                 newval = cp;
 216                 newsize = strlen(cp);
 217         }
 218         len = name2oid(bufp, mib);
 219
 220         if (len < 0) {
 221                 if (iflag)
 222                         return;
 223                 if (qflag)
 224                         exit(1);
 225                 else
 226                         errx(1, "unknown oid '%s'", bufp);
 227         }
 228
 229         if (oidfmt(mib, len, fmt, &kind))
 230                 err(1, "couldn't find format of oid '%s'", bufp);
 231
 232         if (newval == NULL || dflag) {
 233                 if ((kind & CTLTYPE) == CTLTYPE_NODE) {
 234                         if (dflag) {
 235 #ifdef __APPLE__
 236                                 i = show_var(mib, len, 1);
 237 #else
 238                                 i = show_var(mib, len);
 239 #endif
 240                                 if (!i && !bflag)
 241                                         putchar('\n');
 242                         }
 243                         sysctl_all(mib, len);
 244                 } else {
 245 #ifdef __APPLE__
 246                         i = show_var(mib, len, 1);
 247 #else
 248                         i = show_var(mib, len);
 249 #endif
 250                         if (!i && !bflag)
 251                                 putchar('\n');
 252                 }
 253         } else {
 254                 if ((kind & CTLTYPE) == CTLTYPE_NODE)
 255                         errx(1, "oid '%s' isn't a leaf node", bufp);
 256
 257                 if (!(kind & CTLFLAG_WR)) {
 258                         if (kind & CTLFLAG_TUN) {
 259                                 warnx("oid '%s' is a read only tunable", bufp);
 260                                 errx(1, "Tunable values are set in /boot/loader.conf");
 261                         } else {
 262                                 errx(1, "oid '%s' is read only", bufp);
 263                         }
 264                 }
 265
 266                 if ((kind & CTLTYPE) == CTLTYPE_INT ||
 267                     (kind & CTLTYPE) == CTLTYPE_UINT ||
 268                     (kind & CTLTYPE) == CTLTYPE_LONG ||
 269                     (kind & CTLTYPE) == CTLTYPE_ULONG ||
 270                     (kind & CTLTYPE) == CTLTYPE_S64 ||
 271                     (kind & CTLTYPE) == CTLTYPE_U64) {
 272                         if (strlen(newval) == 0)
 273                                 errx(1, "empty numeric value");
 274                 }
 275
 276                 switch (kind & CTLTYPE) {
 277                         case CTLTYPE_INT:
 278                                 if (strcmp(fmt, "IK") == 0) {
 279 #ifndef __APPLE__
 280                                         if (!set_IK(newval, &intval))
 281 #endif
 282                                                 errx(1, "invalid value '%s'",
 283                                                     (char *)newval);
 284                                 } else {
 285                                         intval = (int)strtol(newval, &endptr,
 286                                             0);
 287                                         if (endptr == newval || *endptr != '\0')
 288                                                 errx(1, "invalid integer '%s'",
 289                                                     (char *)newval);
 290                                 }
 291                                 newval = &intval;
 292                                 newsize = sizeof(intval);
 293                                 break;
 294                         case CTLTYPE_UINT:
 295                                 uintval = (int) strtoul(newval, &endptr, 0);
 296                                 if (endptr == newval || *endptr != '\0')
 297                                         errx(1, "invalid unsigned integer '%s'",
 298                                             (char *)newval);
 299                                 newval = &uintval;
 300                                 newsize = sizeof(uintval);
 301                                 break;
 302                         case CTLTYPE_LONG:
 303                                 longval = strtol(newval, &endptr, 0);
 304                                 if (endptr == newval || *endptr != '\0')
 305                                         errx(1, "invalid long integer '%s'",
 306                                             (char *)newval);
 307                                 newval = &longval;
 308                                 newsize = sizeof(longval);
 309                                 break;
 310                         case CTLTYPE_ULONG:
 311                                 ulongval = strtoul(newval, &endptr, 0);
 312                                 if (endptr == newval || *endptr != '\0')
 313                                         errx(1, "invalid unsigned long integer"
 314                                             " '%s'", (char *)newval);
 315                                 newval = &ulongval;
 316                                 newsize = sizeof(ulongval);
 317                                 break;
 318                         case CTLTYPE_STRING:
 319                                 break;
 320                         case CTLTYPE_S64:
 321                                 i64val = strtoimax(newval, &endptr, 0);
 322                                 if (endptr == newval || *endptr != '\0')
 323                                         errx(1, "invalid int64_t '%s'",
 324                                             (char *)newval);
 325                                 newval = &i64val;
 326                                 newsize = sizeof(i64val);
 327                                 break;
 328                         case CTLTYPE_U64:
 329                                 u64val = strtoumax(newval, &endptr, 0);
 330                                 if (endptr == newval || *endptr != '\0')
 331                                         errx(1, "invalid uint64_t '%s'",
 332                                             (char *)newval);
 333                                 newval = &u64val;
 334                                 newsize = sizeof(u64val);
 335                                 break;
 336                         case CTLTYPE_OPAQUE:
 337                                 /* FALLTHROUGH */
 338                         default:
 339                                 errx(1, "oid '%s' is type %d,"
 340                                         " cannot set that", bufp,
 341                                         kind & CTLTYPE);
 342                 }
 343
 344 #ifdef __APPLE__
 345                 i = show_var(mib, len, 1);
 346 #else
 347                 i = show_var(mib, len);
 348 #endif
 349                 if (sysctl(mib, len, 0, 0, newval, newsize) == -1) {
 350                         if (!i && !bflag)
 351                                 putchar('\n');
 352                         switch (errno) {
 353 #ifdef __APPLE__
 354                         case ENOTSUP:
 355 #endif // __APPLE__
 356                         case EOPNOTSUPP:
 357                                 errx(1, "%s: value is not available",
 358                                         string);
 359                         case ENOTDIR:
 360                                 errx(1, "%s: specification is incomplete",
 361                                         string);
 362                         case ENOMEM:
 363                                 errx(1, "%s: type is unknown to this program",
 364                                         string);
 365                         default:
 366                                 warn("%s", string);
 367                                 warncount++;
 368                                 return;
 369                         }
 370                 }
 371                 if (!bflag)
 372                         printf(" -> ");
 373                 i = nflag;
 374                 nflag = 1;
 375 #ifdef __APPLE__
 376                 j = show_var(mib, len, 1);
 377 #else
 378                 j = show_var(mib, len);
 379 #endif
 380                 if (!j && !bflag)
 381                         putchar('\n');
 382                 nflag = i;
 383         }
 384 }
 385
 386 /* These functions will dump out various interesting structures. */
 387
 388 static int
 389 S_clockinfo(int l2, void *p)
 390 {
 391         struct clockinfo *ci = (struct clockinfo*)p;
 392
 393         if (l2 != sizeof(*ci)) {
 394                 warnx("S_clockinfo %d != %zu", l2, sizeof(*ci));
 395                 return (1);
 396         }
 397 #ifdef __APPLE__
 398         printf(hflag ? "{ hz = %'d, tick = %'d, tickadj = %'d, profhz = %'d, stathz = %'d }" :
 399                "{ hz = %d, tick = %d, tickadj = %d, profhz = %d, stathz = %d }",
 400                ci->hz, ci->tick, ci->tickadj, ci->profhz, ci->stathz);
 401 #else
 402         printf(hflag ? "{ hz = %'d, tick = %'d, profhz = %'d, stathz = %'d }" :
 403                 "{ hz = %d, tick = %d, profhz = %d, stathz = %d }",
 404                 ci->hz, ci->tick, ci->profhz, ci->stathz);
 405 #endif
 406         return (0);
 407 }
 408
 409 static int
 410 S_loadavg(int l2, void *p)
 411 {
 412         struct loadavg *tv = (struct loadavg*)p;
 413
 414         if (l2 != sizeof(*tv)) {
 415                 warnx("S_loadavg %d != %zu", l2, sizeof(*tv));
 416                 return (1);
 417         }
 418         printf(hflag ? "{ %'.2f %'.2f %'.2f }" : "{ %.2f %.2f %.2f }",
 419                 (double)tv->ldavg[0]/(double)tv->fscale,
 420                 (double)tv->ldavg[1]/(double)tv->fscale,
 421                 (double)tv->ldavg[2]/(double)tv->fscale);
 422         return (0);
 423 }
 424
 425 static int
 426 S_timeval(int l2, void *p)
 427 {
 428         struct timeval *tv = (struct timeval*)p;
 429         time_t tv_sec;
 430         char *p1, *p2;
 431
 432         if (l2 != sizeof(*tv)) {
 433                 warnx("S_timeval %d != %zu", l2, sizeof(*tv));
 434                 return (1);
 435         }
 436         printf(hflag ? "{ sec = %'jd, usec = %'ld } " :
 437                 "{ sec = %jd, usec = %ld } ",
 438                 (intmax_t)tv->tv_sec, (long)tv->tv_usec);
 439         tv_sec = tv->tv_sec;
 440         p1 = strdup(ctime(&tv_sec));
 441         for (p2=p1; *p2 ; p2++)
 442                 if (*p2 == '\n')
 443                         *p2 = '\0';
 444         fputs(p1, stdout);
 445         free(p1);
 446         return (0);
 447 }
 448
 449 #ifndef __APPLE__
 450 static int
 451 S_vmtotal(int l2, void *p)
 452 {
 453         struct vmtotal *v = (struct vmtotal *)p;
 454         int pageKilo = getpagesize() / 1024;
 455
 456         if (l2 != sizeof(*v)) {
 457                 warnx("S_vmtotal %d != %zu", l2, sizeof(*v));
 458                 return (1);
 459         }
 460
 461         printf(
 462             "\nSystem wide totals computed every five seconds:"
 463             " (values in kilobytes)\n");
 464         printf("===============================================\n");
 465         printf(
 466             "Processes:\t\t(RUNQ: %hd Disk Wait: %hd Page Wait: "
 467             "%hd Sleep: %hd)\n",
 468             v->t_rq, v->t_dw, v->t_pw, v->t_sl);
 469         printf(
 470             "Virtual Memory:\t\t(Total: %dK Active: %dK)\n",
 471             v->t_vm * pageKilo, v->t_avm * pageKilo);
 472         printf("Real Memory:\t\t(Total: %dK Active: %dK)\n",
 473             v->t_rm * pageKilo, v->t_arm * pageKilo);
 474         printf("Shared Virtual Memory:\t(Total: %dK Active: %dK)\n",
 475             v->t_vmshr * pageKilo, v->t_avmshr * pageKilo);
 476         printf("Shared Real Memory:\t(Total: %dK Active: %dK)\n",
 477             v->t_rmshr * pageKilo, v->t_armshr * pageKilo);
 478         printf("Free Memory:\t%dK\n", v->t_free * pageKilo);
 479
 480         return (0);
 481 }
 482
 483 static int
 484 set_IK(const char *str, int *val)
 485 {
 486         float temp;
 487         int len, kelv;
 488         const char *p;
 489         char *endptr;
 490
 491         if ((len = strlen(str)) == 0)
 492                 return (0);
 493         p = &str[len - 1];
 494         if (*p == 'C' || *p == 'F') {
 495                 temp = strtof(str, &endptr);
 496                 if (endptr == str || endptr != p)
 497                         return (0);
 498                 if (*p == 'F')
 499                         temp = (temp - 32) * 5 / 9;
 500                 kelv = temp * 10 + 2732;
 501         } else {
 502                 kelv = (int)strtol(str, &endptr, 10);
 503                 if (endptr == str || *endptr != '\0')
 504                         return (0);
 505         }
 506         *val = kelv;
 507         return (1);
 508 }
 509 #endif // !__APPLE__
 510
 511 #ifdef __APPLE__
 512 static int
 513 S_xswusage(int l2, void *p)
 514 {
 515         struct xsw_usage *xsu = (struct xsw_usage *)p;
 516
 517         if (l2 != sizeof(*xsu)) {
 518                 warnx("S_xswusage %d != %ld", l2, sizeof(*xsu));
 519                 return (1);
 520         }
 521         fprintf(stdout,
 522                 "total = %.2fM  used = %.2fM  free = %.2fM  %s",
 523                 ((double)xsu->xsu_total) / (1024.0 * 1024.0),
 524                 ((double)xsu->xsu_used) / (1024.0 * 1024.0),
 525                 ((double)xsu->xsu_avail) / (1024.0 * 1024.0),
 526                 xsu->xsu_encrypted ? "(encrypted)" : "");
 527         return (0);
 528 }
 529
 530 static int
 531 T_dev_t(int l2, void *p)
 532 {
 533         dev_t *d = (dev_t *)p;
 534
 535         if (l2 != sizeof(*d)) {
 536                 warnx("T_dev_T %d != %ld", l2, sizeof(*d));
 537                 return (1);
 538         }
 539         if ((int)(*d) != -1) {
 540                 if (minor(*d) > 255 || minor(*d) < 0)
 541                         printf("{ major = %d, minor = 0x%x }",
 542                                 major(*d), minor(*d));
 543                 else
 544                         printf("{ major = %d, minor = %d }",
 545                                 major(*d), minor(*d));
 546         }
 547         return (0);
 548 }
 549
 550 static int
 551 S_quads(int len, void *p)
 552 {
 553         size_t size = sizeof(int64_t);
 554         if (len & (size-1)) {
 555                 return 1;
 556         }
 557         while (len > 0) {
 558                 int64_t i = *(int64_t *)p;
 559                 printf("%llu", i);
 560                 if (len > size) {
 561                         len -= size;
 562                         p = (uintptr_t)p + size;
 563                         printf(" ");
 564                 } else {
 565                         break;
 566                 }
 567         }
 568         return 0;
 569 }
 570 #endif // __APPLE__
 571
 572 /*
 573  * These functions uses a presently undocumented interface to the kernel
 574  * to walk the tree and get the type so it can print the value.
 575  * This interface is under work and consideration, and should probably
 576  * be killed with a big axe by the first person who can find the time.
 577  * (be aware though, that the proper interface isn't as obvious as it
 578  * may seem, there are various conflicting requirements.
 579  */
 580
 581 static int
 582 name2oid(char *name, int *oidp)
 583 {
 584         int oid[2];
 585         int i;
 586         size_t j;
 587
 588 #ifdef __APPLE__
 589         // Support for CTL_USER
 590         const char *user = names[CTL_USER].ctl_name;
 591         j = strlen(user);
 592         if (!strncmp(name, user, j)) {
 593                 oidp[0] = CTL_USER;
 594                 if (name[j] == '.') {
 595                         for (i = 1; i < user_names_count; ++i) {
 596                                 if (!strcmp(&name[j+1], user_names[i].ctl_name)) {
 597                                         oidp[1] = i;
 598                                         return 2;
 599                                 }
 600                         }
 601                         return -1;
 602                 } else if (name[j] == 0) {
 603                         return 1;
 604                 }
 605                 return -1;
 606         }
 607 #endif
 608
 609         oid[0] = 0;
 610         oid[1] = 3;
 611
 612         j = CTL_MAXNAME * sizeof(int);
 613         i = sysctl(oid, 2, oidp, &j, name, strlen(name));
 614         if (i < 0)
 615                 return (i);
 616         j /= sizeof(int);
 617         return (int)j;
 618 }
 619
 620 static int
 621 oidfmt(int *oid, int len, char *fmt, u_int *kind)
 622 {
 623         int qoid[CTL_MAXNAME+2];
 624         u_char buf[BUFSIZ];
 625         int i;
 626         size_t j;
 627
 628         qoid[0] = 0;
 629         qoid[1] = 4;
 630         memcpy(qoid + 2, oid, len * sizeof(int));
 631
 632         j = sizeof(buf);
 633         i = sysctl(qoid, len + 2, buf, &j, 0, 0);
 634 #ifdef __APPLE__
 635         if (i && errno == ENOENT) {
 636                 // Support for CTL_USER
 637                 if (oid[0] == CTL_USER) {
 638                         if (len == 1) {
 639                                 *kind = CTLTYPE_NODE;
 640                                 return 0;
 641                         } else if (len == 2 && oid[1] < user_names_count) {
 642                                 *kind = user_names[oid[1]].ctl_type;
 643                                 return 0;
 644                         }
 645                 }
 646                 return 1;
 647         }
 648 #endif
 649         if (i)
 650                 err(1, "sysctl fmt %d %zu %d", i, j, errno);
 651
 652         if (kind)
 653 #ifdef __APPLE__
 654                 memcpy(kind, buf, sizeof(*kind));
 655 #else
 656                 *kind = *(u_int *)buf;
 657 #endif
 658
 659         if (fmt)
 660                 strcpy(fmt, (char *)(buf + sizeof(u_int)));
 661
 662 #ifdef __APPLE__
 663         // Map Darwin sysctl types to FreeBSD types.
 664         // - 0 with "I" -> CTLTYPE_INT
 665         // - 0 with "S," -> CTLTYPE_STRUCT
 666         // - CTLTYPE_INT with "IU" -> CTLTYPE_UINT
 667         // - CTLTYPE_INT with "L" -> CTLTYPE_LONG
 668         // - CTLTYPE_QUAD -> CTLTYPE_S64
 669         // - CTLTYPE_QUAD with "*U" -> CTLTYPE_U64
 670         if (kind) {
 671                 switch (*kind & CTLTYPE) {
 672                         case 0:
 673                         case CTLTYPE_INT:
 674                                 if (buf[sizeof(u_int)] == 'S') {
 675                                         *kind = (*kind & ~CTLTYPE) | CTLTYPE_STRUCT;
 676                                 } else if (buf[sizeof(u_int)] == 'I') {
 677                                         *kind = (*kind & ~CTLTYPE) | CTLTYPE_INT;
 678                                         if (buf[sizeof(u_int)+1] == 'U') {
 679                                                 *kind = (*kind & ~CTLTYPE) | CTLTYPE_UINT;
 680                                         }
 681                                 } else if (buf[sizeof(u_int)] == 'L') {
 682                                         *kind = (*kind & ~CTLTYPE) | CTLTYPE_LONG;
 683                                 }
 684                                 break;
 685                         case CTLTYPE_QUAD:
 686                                 *kind = (*kind & ~CTLTYPE);
 687                                 if (fmt && strchr(fmt, 'U')) {
 688                                         *kind |= CTLTYPE_U64;
 689                                 } else {
 690                                         *kind |= CTLTYPE_S64;
 691                                 }
 692                                 break;
 693                 }
 694         }
 695 #endif
 696
 697         return (0);
 698 }
 699
 700 static int ctl_sign[CTLTYPE+1] = {
 701         [CTLTYPE_INT] = 1,
 702         [CTLTYPE_LONG] = 1,
 703         [CTLTYPE_S64] = 1,
 704 };
 705
 706 static int ctl_size[CTLTYPE+1] = {
 707         [CTLTYPE_INT] = sizeof(int),
 708         [CTLTYPE_UINT] = sizeof(u_int),
 709         [CTLTYPE_LONG] = sizeof(long),
 710         [CTLTYPE_ULONG] = sizeof(u_long),
 711         [CTLTYPE_S64] = sizeof(int64_t),
 712         [CTLTYPE_U64] = sizeof(int64_t),
 713 };
 714
 715 /*
 716  * This formats and outputs the value of one variable
 717  *
 718  * Returns zero if anything was actually output.
 719  * Returns one if didn't know what to do with this.
 720  * Return minus one if we had errors.
 721  */
 722 static int
 723 #ifdef __APPLE__
 724 show_var(int *oid, int nlen, int show_masked)
 725 #else
 726 show_var(int *oid, int nlen)
 727 #endif
 728 {
 729         u_char buf[BUFSIZ], *val, *oval, *p;
 730         char name[BUFSIZ], *fmt;
 731         const char *sep, *sep1;
 732         int qoid[CTL_MAXNAME+2];
 733         uintmax_t umv;
 734         intmax_t mv;
 735         int i, hexlen, sign, ctltype;
 736         size_t intlen;
 737         size_t j, len;
 738         u_int kind;
 739         int (*func)(int, void *);
 740
 741         /* Silence GCC. */
 742         umv = mv = intlen = 0;
 743
 744         bzero(buf, BUFSIZ);
 745         bzero(name, BUFSIZ);
 746         qoid[0] = 0;
 747         memcpy(qoid + 2, oid, nlen * sizeof(int));
 748
 749 #ifdef __APPLE__
 750         // Support for CTL_USER
 751         if (nlen >= 1 && oid[0] == CTL_USER) {
 752                 const char *user_name = "";
 753                 sep = "";
 754                 i = oid[1];
 755                 if (nlen == 2 && i > 0 && i < user_names_count) {
 756                         user_name = user_names[i].ctl_name;
 757                         sep = ".";
 758                 }
 759                 j = snprintf(name, sizeof(name), "%s%s%s",
 760                              names[CTL_USER].ctl_name, sep, user_name);
 761                 i = 0;
 762         } else {
 763 #endif
 764         qoid[1] = 1;
 765         j = sizeof(name);
 766         i = sysctl(qoid, nlen + 2, name, &j, 0, 0);
 767         if (i || !j)
 768                 err(1, "sysctl name %d %zu %d", i, j, errno);
 769 #ifdef __APPLE__
 770         }
 771 #endif
 772
 773         if (Nflag) {
 774                 printf("%s", name);
 775                 return (0);
 776         }
 777
 778         if (eflag)
 779                 sep = "=";
 780         else
 781                 sep = ": ";
 782
 783         if (dflag) {    /* just print description */
 784                 qoid[1] = 5;
 785                 j = sizeof(buf);
 786                 i = sysctl(qoid, nlen + 2, buf, &j, 0, 0);
 787                 if (!nflag)
 788                         printf("%s%s", name, sep);
 789                 printf("%s", buf);
 790                 return (0);
 791         }
 792         /* find an estimate of how much we need for this var */
 793         j = 0;
 794         i = sysctl(oid, nlen, 0, &j, 0, 0);
 795         j += j; /* we want to be sure :-) */
 796
 797         val = oval = malloc(j + 1);
 798         if (val == NULL) {
 799                 warnx("malloc failed");
 800                 return (1);
 801         }
 802         len = j;
 803         i = sysctl(oid, nlen, val, &len, 0, 0);
 804         if (i || !len) {
 805                 free(oval);
 806                 return (1);
 807         }
 808
 809         if (bflag) {
 810                 fwrite(val, 1, len, stdout);
 811                 free(oval);
 812                 return (0);
 813         }
 814         val[len] = '\0';
 815         fmt = (char *)buf;
 816         oidfmt(oid, nlen, fmt, &kind);
 817         p = val;
 818         ctltype = (kind & CTLTYPE);
 819         sign = ctl_sign[ctltype];
 820         intlen = ctl_size[ctltype];
 821
 822 #ifdef __APPLE__
 823         if (!show_masked && (kind & CTLFLAG_MASKED)) {
 824                 free(oval);
 825                 return (1);
 826         }
 827 #endif
 828
 829         switch (ctltype) {
 830         case CTLTYPE_STRING:
 831                 if (!nflag)
 832                         printf("%s%s", name, sep);
 833                 printf("%.*s", (int)len, p);
 834                 free(oval);
 835                 return (0);
 836
 837         case CTLTYPE_INT:
 838         case CTLTYPE_UINT:
 839         case CTLTYPE_LONG:
 840         case CTLTYPE_ULONG:
 841         case CTLTYPE_S64:
 842         case CTLTYPE_U64:
 843                 if (!nflag)
 844                         printf("%s%s", name, sep);
 845                 hexlen = (int)(2 + (intlen * CHAR_BIT + 3) / 4);
 846                 sep1 = "";
 847                 while (len >= intlen) {
 848                         switch (kind & CTLTYPE) {
 849                         case CTLTYPE_INT:
 850                         case CTLTYPE_UINT:
 851                                 umv = *(u_int *)(void *)p;
 852                                 mv = *(int *)(void *)p;
 853                                 break;
 854                         case CTLTYPE_LONG:
 855                         case CTLTYPE_ULONG:
 856                                 umv = *(u_long *)(void *)p;
 857                                 mv = *(long *)(void *)p;
 858                                 break;
 859                         case CTLTYPE_S64:
 860                         case CTLTYPE_U64:
 861                                 umv = *(uint64_t *)(void *)p;
 862                                 mv = *(int64_t *)(void *)p;
 863                                 break;
 864                         }
 865                         fputs(sep1, stdout);
 866                         if (xflag)
 867                                 printf("%#0*jx", hexlen, umv);
 868                         else if (!sign)
 869                                 printf(hflag ? "%'ju" : "%ju", umv);
 870                         else if (fmt[1] == 'K') {
 871                                 if (mv < 0)
 872                                         printf("%jd", mv);
 873                                 else
 874                                         printf("%.1fC", (mv - 2732.0) / 10);
 875                         } else
 876                                 printf(hflag ? "%'jd" : "%jd", mv);
 877                         sep1 = " ";
 878                         len -= intlen;
 879                         p += intlen;
 880                 }
 881                 free(oval);
 882                 return (0);
 883
 884         case CTLTYPE_OPAQUE:
 885                 i = 0;
 886                 if (strcmp(fmt, "S,clockinfo") == 0)
 887                         func = S_clockinfo;
 888                 else if (strcmp(fmt, "S,timeval") == 0)
 889                         func = S_timeval;
 890                 else if (strcmp(fmt, "S,loadavg") == 0)
 891                         func = S_loadavg;
 892 #ifdef __APPLE__
 893                 else if (!strcmp(fmt, "S,xsw_usage"))
 894                         func = S_xswusage;
 895                 else if (!strcmp(fmt, "T,dev_t"))
 896                         func = T_dev_t;
 897                 else if (!strcmp(fmt, "Q"))
 898                         func = S_quads;
 899 #else // !__APPLE__
 900                 else if (strcmp(fmt, "S,vmtotal") == 0)
 901                         func = S_vmtotal;
 902 #endif // !__APPLE__
 903                 else
 904                         func = NULL;
 905                 if (func) {
 906                         if (!nflag)
 907                                 printf("%s%s", name, sep);
 908                         i = (*func)((int)len, p);
 909                         free(oval);
 910                         return (i);
 911                 }
 912                 /* FALLTHROUGH */
 913         default:
 914                 if (!oflag && !xflag) {
 915                         free(oval);
 916                         return (1);
 917                 }
 918                 if (!nflag)
 919                         printf("%s%s", name, sep);
 920                 printf("Format:%s Length:%zu Dump:0x", fmt, len);
 921                 while (len-- && (xflag || p < val + 16))
 922                         printf("%02x", *p++);
 923                 if (!xflag && len > 16)
 924                         printf("...");
 925                 free(oval);
 926                 return (0);
 927         }
 928         free(oval);
 929         return (1);
 930 }
 931
 932 #ifdef __APPLE__
 933 // Support for CTL_USER
 934 static void
 935 sysctl_all_user(int *oid, int len)
 936 {
 937         int i, j;
 938         if (len > 1 || (len == 1 && oid[0] != CTL_USER)) {
 939                 return;
 940         }
 941         for (i = 0; i < user_names_count; ++i) {
 942                 int oid[2] = { CTL_USER, i };
 943                 j = show_var(oid, 2, 0);
 944                 if (!j && !bflag) {
 945                         putchar('\n');
 946                 }
 947         }
 948 }
 949 #endif
 950
 951 static int
 952 sysctl_all(int *oid, int len)
 953 {
 954         int name1[22], name2[22];
 955         int i, j;
 956         size_t l1, l2;
 957
 958 #ifdef __APPLE__
 959         sysctl_all_user(oid, len);
 960 #endif
 961
 962         name1[0] = 0;
 963         name1[1] = 2;
 964         l1 = 2;
 965         if (len) {
 966                 memcpy(name1+2, oid, len * sizeof(int));
 967                 l1 += len;
 968         } else {
 969                 name1[2] = 1;
 970                 l1++;
 971         }
 972         for (;;) {
 973                 l2 = sizeof(name2);
 974                 j = sysctl(name1, (u_int)l1, name2, &l2, 0, 0);
 975                 if (j < 0) {
 976                         if (errno == ENOENT)
 977                                 return (0);
 978                         else
 979                                 err(1, "sysctl(getnext) %d %zu", j, l2);
 980                 }
 981
 982                 l2 /= sizeof(int);
 983
 984                 if (len < 0 || l2 < (unsigned int)len)
 985                         return (0);
 986
 987                 for (i = 0; i < len; i++)
 988                         if (name2[i] != oid[i])
 989                                 return (0);
 990
 991 #ifdef __APPLE__
 992                 i = show_var(name2, (u_int)l2, 0);
 993 #else
 994                 i = show_var(name2, (u_int)l2);
 995 #endif
 996                 if (!i && !bflag)
 997                         putchar('\n');
 998
 999                 memcpy(name1+2, name2, l2 * sizeof(int));
1000                 l1 = 2 + l2;
1001         }
1002 }