| 1 | /* |
| 2 | * Copyright (c) 1993 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * %sccs.include.redist.c% |
| 6 | */ |
| 7 | |
| 8 | #ifndef lint |
| 9 | char copyright[] = |
| 10 | "@(#) Copyright (c) 1993 The Regents of the University of California.\n\ |
| 11 | All rights reserved.\n"; |
| 12 | #endif /* not lint */ |
| 13 | |
| 14 | #ifndef lint |
| 15 | static char sccsid[] = "@(#)sysctl.c 5.10 (Berkeley) %G%"; |
| 16 | #endif /* not lint */ |
| 17 | |
| 18 | #include <sys/param.h> |
| 19 | #include <sys/gmon.h> |
| 20 | #include <sys/stat.h> |
| 21 | #include <sys/sysctl.h> |
| 22 | #include <sys/socket.h> |
| 23 | #include <vm/vm_param.h> |
| 24 | |
| 25 | #include <netinet/in.h> |
| 26 | #include <netinet/in_systm.h> |
| 27 | #include <netinet/ip.h> |
| 28 | #include <netinet/ip_icmp.h> |
| 29 | #include <netinet/icmp_var.h> |
| 30 | #include <netinet/ip_var.h> |
| 31 | #include <netinet/udp.h> |
| 32 | #include <netinet/udp_var.h> |
| 33 | |
| 34 | #include <errno.h> |
| 35 | #include <stdio.h> |
| 36 | #include <stdlib.h> |
| 37 | #include <string.h> |
| 38 | |
| 39 | struct ctlname topname[] = CTL_NAMES; |
| 40 | struct ctlname kernname[] = CTL_KERN_NAMES; |
| 41 | struct ctlname vmname[] = CTL_VM_NAMES; |
| 42 | struct ctlname netname[] = CTL_NET_NAMES; |
| 43 | struct ctlname hwname[] = CTL_HW_NAMES; |
| 44 | struct ctlname username[] = CTL_USER_NAMES; |
| 45 | struct ctlname debugname[CTL_DEBUG_MAXID]; |
| 46 | char names[BUFSIZ]; |
| 47 | |
| 48 | struct list { |
| 49 | struct ctlname *list; |
| 50 | int size; |
| 51 | }; |
| 52 | struct list toplist = { topname, CTL_MAXID }; |
| 53 | struct list secondlevel[] = { |
| 54 | { 0, 0 }, /* CTL_UNSPEC */ |
| 55 | { kernname, KERN_MAXID }, /* CTL_KERN */ |
| 56 | { vmname, VM_MAXID }, /* CTL_VM */ |
| 57 | { 0, 0 }, /* CTL_FS */ |
| 58 | { netname, NET_MAXID }, /* CTL_NET */ |
| 59 | { 0, CTL_DEBUG_MAXID }, /* CTL_DEBUG */ |
| 60 | { hwname, HW_MAXID }, /* CTL_HW */ |
| 61 | { 0, 0 }, /* CTL_MACHDEP */ |
| 62 | { username, USER_MAXID }, /* CTL_USER_NAMES */ |
| 63 | }; |
| 64 | |
| 65 | int Aflag, aflag, nflag, wflag; |
| 66 | |
| 67 | int |
| 68 | main(argc, argv) |
| 69 | int argc; |
| 70 | char *argv[]; |
| 71 | { |
| 72 | extern char *optarg; |
| 73 | extern int optind; |
| 74 | int ch, lvl1; |
| 75 | |
| 76 | while ((ch = getopt(argc, argv, "Aanw")) != EOF) { |
| 77 | switch (ch) { |
| 78 | |
| 79 | case 'A': |
| 80 | Aflag = 1; |
| 81 | break; |
| 82 | |
| 83 | case 'a': |
| 84 | aflag = 1; |
| 85 | break; |
| 86 | |
| 87 | case 'n': |
| 88 | nflag = 1; |
| 89 | break; |
| 90 | |
| 91 | case 'w': |
| 92 | wflag = 1; |
| 93 | break; |
| 94 | |
| 95 | default: |
| 96 | usage(); |
| 97 | } |
| 98 | } |
| 99 | argc -= optind; |
| 100 | argv += optind; |
| 101 | |
| 102 | if (Aflag || aflag) { |
| 103 | debuginit(); |
| 104 | for (lvl1 = 1; lvl1 < CTL_MAXID; lvl1++) |
| 105 | listall(topname[lvl1].ctl_name, &secondlevel[lvl1]); |
| 106 | exit(0); |
| 107 | } |
| 108 | if (argc == 0) |
| 109 | usage(); |
| 110 | while (argc-- > 0) |
| 111 | parse(*argv, 1); |
| 112 | exit(0); |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * List all variables known to the system. |
| 117 | */ |
| 118 | listall(prefix, lp) |
| 119 | char *prefix; |
| 120 | struct list *lp; |
| 121 | { |
| 122 | int lvl2; |
| 123 | char *cp, name[BUFSIZ]; |
| 124 | |
| 125 | if (lp->list == 0) |
| 126 | return; |
| 127 | strcpy(name, prefix); |
| 128 | cp = &name[strlen(name)]; |
| 129 | *cp++ = '.'; |
| 130 | for (lvl2 = 0; lvl2 < lp->size; lvl2++) { |
| 131 | if (lp->list[lvl2].ctl_name == 0) |
| 132 | continue; |
| 133 | strcpy(cp, lp->list[lvl2].ctl_name); |
| 134 | parse(name, Aflag); |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * Parse a name into a MIB entry. |
| 140 | * Lookup and print out the MIB entry if it exists. |
| 141 | * Set a new value if requested. |
| 142 | */ |
| 143 | parse(string, flags) |
| 144 | char *string; |
| 145 | int flags; |
| 146 | { |
| 147 | int indx, type, state, size, len; |
| 148 | int isclockrate = 0; |
| 149 | void *newval = 0; |
| 150 | int intval, newsize = 0; |
| 151 | quad_t quadval; |
| 152 | struct list *lp; |
| 153 | int mib[CTL_MAXNAME]; |
| 154 | char *cp, *bufp, buf[BUFSIZ], strval[BUFSIZ]; |
| 155 | |
| 156 | bufp = buf; |
| 157 | snprintf(buf, BUFSIZ, "%s", string); |
| 158 | if ((cp = strchr(string, '=')) != NULL) { |
| 159 | if (!wflag) { |
| 160 | fprintf(stderr, "Must specify -w to set variables\n"); |
| 161 | exit(2); |
| 162 | } |
| 163 | *strchr(buf, '=') = '\0'; |
| 164 | *cp++ = '\0'; |
| 165 | while (isspace(*cp)) |
| 166 | cp++; |
| 167 | newval = cp; |
| 168 | newsize = strlen(cp); |
| 169 | } |
| 170 | if ((indx = findname(string, "top", &bufp, &toplist)) == -1) |
| 171 | return; |
| 172 | mib[0] = indx; |
| 173 | if (indx == CTL_DEBUG) |
| 174 | debuginit(); |
| 175 | lp = &secondlevel[indx]; |
| 176 | if (lp->list == 0) { |
| 177 | fprintf(stderr, "%s: class is not implemented\n", |
| 178 | topname[indx]); |
| 179 | return; |
| 180 | } |
| 181 | if (bufp == NULL) { |
| 182 | listall(topname[indx].ctl_name, lp); |
| 183 | return; |
| 184 | } |
| 185 | if ((indx = findname(string, "second", &bufp, lp)) == -1) |
| 186 | return; |
| 187 | mib[1] = indx; |
| 188 | type = lp->list[indx].ctl_type; |
| 189 | len = 2; |
| 190 | switch (mib[0]) { |
| 191 | |
| 192 | case CTL_KERN: |
| 193 | switch (mib[1]) { |
| 194 | case KERN_PROF: |
| 195 | mib[2] = GPROF_STATE; |
| 196 | size = sizeof state; |
| 197 | if (sysctl(mib, 3, &state, &size, NULL, 0) < 0) { |
| 198 | if (flags == 0) |
| 199 | return; |
| 200 | if (!nflag) |
| 201 | fprintf(stdout, "%s: ", string); |
| 202 | fprintf(stderr, |
| 203 | "kernel is not compiled for profiling\n"); |
| 204 | return; |
| 205 | } |
| 206 | if (!nflag) |
| 207 | fprintf(stdout, "%s: %s\n", string, |
| 208 | state == GMON_PROF_OFF ? "off" : "running"); |
| 209 | return; |
| 210 | case KERN_VNODE: |
| 211 | case KERN_FILE: |
| 212 | if (flags == 0) |
| 213 | return; |
| 214 | fprintf(stderr, |
| 215 | "Use pstat to view %s information\n", string); |
| 216 | return; |
| 217 | case KERN_PROC: |
| 218 | if (flags == 0) |
| 219 | return; |
| 220 | fprintf(stderr, |
| 221 | "Use ps to view %s information\n", string); |
| 222 | return; |
| 223 | case KERN_CLOCKRATE: |
| 224 | isclockrate = 1; |
| 225 | break; |
| 226 | } |
| 227 | break; |
| 228 | |
| 229 | case CTL_HW: |
| 230 | break; |
| 231 | |
| 232 | case CTL_VM: |
| 233 | if (mib[1] == VM_LOADAVG) { |
| 234 | double loads[3]; |
| 235 | |
| 236 | getloadavg(loads, 3); |
| 237 | if (!nflag) |
| 238 | fprintf(stdout, "%s: ", string); |
| 239 | fprintf(stdout, "%.2f %.2f %.2f\n", |
| 240 | loads[0], loads[1], loads[2]); |
| 241 | return; |
| 242 | } |
| 243 | if (flags == 0) |
| 244 | return; |
| 245 | fprintf(stderr, |
| 246 | "Use vmstat or systat to view %s information\n", string); |
| 247 | return; |
| 248 | |
| 249 | case CTL_NET: |
| 250 | if (mib[1] == PF_INET) { |
| 251 | len = sysctl_inet(string, &bufp, mib, flags, &type); |
| 252 | if (len >= 0) |
| 253 | break; |
| 254 | return; |
| 255 | } |
| 256 | if (flags == 0) |
| 257 | return; |
| 258 | fprintf(stderr, "Use netstat to view %s information\n", string); |
| 259 | return; |
| 260 | |
| 261 | case CTL_DEBUG: |
| 262 | mib[2] = CTL_DEBUG_VALUE; |
| 263 | len = 3; |
| 264 | break; |
| 265 | |
| 266 | case CTL_FS: |
| 267 | case CTL_MACHDEP: |
| 268 | case CTL_USER: |
| 269 | break; |
| 270 | |
| 271 | default: |
| 272 | fprintf(stderr, "Illegal top level value: %d\n", mib[0]); |
| 273 | return; |
| 274 | |
| 275 | } |
| 276 | if (bufp) { |
| 277 | fprintf(stderr, "name %s in %s is unknown\n", *bufp, string); |
| 278 | return; |
| 279 | } |
| 280 | if (newsize > 0) { |
| 281 | switch (type) { |
| 282 | case CTLTYPE_INT: |
| 283 | intval = atoi(newval); |
| 284 | newval = &intval; |
| 285 | newsize = sizeof intval; |
| 286 | break; |
| 287 | |
| 288 | case CTLTYPE_QUAD: |
| 289 | sscanf(newval, "%qd", &quadval); |
| 290 | newval = &quadval; |
| 291 | newsize = sizeof quadval; |
| 292 | break; |
| 293 | } |
| 294 | } |
| 295 | size = BUFSIZ; |
| 296 | if (sysctl(mib, len, buf, &size, newsize ? newval : 0, newsize) == -1) { |
| 297 | if (flags == 0) |
| 298 | return; |
| 299 | switch (errno) { |
| 300 | case EOPNOTSUPP: |
| 301 | fprintf(stderr, "%s: value is not available\n", string); |
| 302 | return; |
| 303 | case ENOTDIR: |
| 304 | fprintf(stderr, "%s: specification is incomplete\n", |
| 305 | string); |
| 306 | return; |
| 307 | case ENOMEM: |
| 308 | fprintf(stderr, "%s: type is unknown to this program\n", |
| 309 | string); |
| 310 | return; |
| 311 | default: |
| 312 | perror(string); |
| 313 | return; |
| 314 | } |
| 315 | } |
| 316 | if (isclockrate) { |
| 317 | struct clockinfo *clkp = (struct clockinfo *)buf; |
| 318 | |
| 319 | if (!nflag) |
| 320 | fprintf(stdout, "%s: ", string); |
| 321 | fprintf(stdout, |
| 322 | "hz = %d, tick = %d, profhz = %d, stathz = %d\n", |
| 323 | clkp->hz, clkp->tick, clkp->profhz, clkp->stathz); |
| 324 | return; |
| 325 | } |
| 326 | switch (type) { |
| 327 | case CTLTYPE_INT: |
| 328 | if (newsize == 0) { |
| 329 | if (!nflag) |
| 330 | fprintf(stdout, "%s = ", string); |
| 331 | fprintf(stdout, "%d\n", *(int *)buf); |
| 332 | } else { |
| 333 | if (!nflag) |
| 334 | fprintf(stdout, "%s: %d -> ", string, |
| 335 | *(int *)buf); |
| 336 | fprintf(stdout, "%d\n", *(int *)newval); |
| 337 | } |
| 338 | return; |
| 339 | |
| 340 | case CTLTYPE_STRING: |
| 341 | if (newsize == 0) { |
| 342 | if (!nflag) |
| 343 | fprintf(stdout, "%s = ", string); |
| 344 | fprintf(stdout, "%s\n", buf); |
| 345 | } else { |
| 346 | if (!nflag) |
| 347 | fprintf(stdout, "%s: %s -> ", string, buf); |
| 348 | fprintf(stdout, "%s\n", newval); |
| 349 | } |
| 350 | return; |
| 351 | |
| 352 | case CTLTYPE_QUAD: |
| 353 | if (newsize == 0) { |
| 354 | if (!nflag) |
| 355 | fprintf(stdout, "%s = ", string); |
| 356 | fprintf(stdout, "%qd\n", *(quad_t *)buf); |
| 357 | } else { |
| 358 | if (!nflag) |
| 359 | fprintf(stdout, "%s: %qd -> ", string, |
| 360 | *(quad_t *)buf); |
| 361 | fprintf(stdout, "%qd\n", *(quad_t *)newval); |
| 362 | } |
| 363 | return; |
| 364 | |
| 365 | case CTLTYPE_STRUCT: |
| 366 | fprintf(stderr, "%s: unknown structure returned\n", |
| 367 | string); |
| 368 | return; |
| 369 | |
| 370 | default: |
| 371 | case CTLTYPE_NODE: |
| 372 | fprintf(stderr, "%s: unknown type returned\n", |
| 373 | string); |
| 374 | return; |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | /* |
| 379 | * Initialize the set of debugging names |
| 380 | */ |
| 381 | debuginit() |
| 382 | { |
| 383 | int mib[3], size, loc, i; |
| 384 | |
| 385 | if (secondlevel[CTL_DEBUG].list != 0) |
| 386 | return; |
| 387 | secondlevel[CTL_DEBUG].list = debugname; |
| 388 | mib[0] = CTL_DEBUG; |
| 389 | mib[2] = CTL_DEBUG_NAME; |
| 390 | for (loc = 0, i = 0; i < CTL_DEBUG_MAXID; i++) { |
| 391 | mib[1] = i; |
| 392 | size = BUFSIZ - loc; |
| 393 | if (sysctl(mib, 3, &names[loc], &size, NULL, 0) == -1) |
| 394 | continue; |
| 395 | debugname[i].ctl_name = &names[loc]; |
| 396 | debugname[i].ctl_type = CTLTYPE_INT; |
| 397 | loc += size; |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | struct ctlname inetname[] = CTL_IPPROTO_NAMES; |
| 402 | struct ctlname ipname[] = IPCTL_NAMES; |
| 403 | struct ctlname icmpname[] = ICMPCTL_NAMES; |
| 404 | struct ctlname udpname[] = UDPCTL_NAMES; |
| 405 | struct list inetlist = { inetname, IPPROTO_MAXID }; |
| 406 | struct list inetvars[] = { |
| 407 | { ipname, IPCTL_MAXID }, /* ip */ |
| 408 | { icmpname, ICMPCTL_MAXID }, /* icmp */ |
| 409 | { 0, 0 }, /* igmp */ |
| 410 | { 0, 0 }, /* ggmp */ |
| 411 | { 0, 0 }, |
| 412 | { 0, 0 }, |
| 413 | { 0, 0 }, /* tcp */ |
| 414 | { 0, 0 }, |
| 415 | { 0, 0 }, /* egp */ |
| 416 | { 0, 0 }, |
| 417 | { 0, 0 }, |
| 418 | { 0, 0 }, |
| 419 | { 0, 0 }, /* pup */ |
| 420 | { 0, 0 }, |
| 421 | { 0, 0 }, |
| 422 | { 0, 0 }, |
| 423 | { 0, 0 }, |
| 424 | { udpname, UDPCTL_MAXID }, /* udp */ |
| 425 | }; |
| 426 | |
| 427 | /* |
| 428 | * handle internet requests |
| 429 | */ |
| 430 | sysctl_inet(string, bufpp, mib, flags, typep) |
| 431 | char *string; |
| 432 | char **bufpp; |
| 433 | int mib[]; |
| 434 | int flags; |
| 435 | int *typep; |
| 436 | { |
| 437 | struct list *lp; |
| 438 | int indx; |
| 439 | |
| 440 | if (*bufpp == NULL) { |
| 441 | listall(string, &inetlist); |
| 442 | return (-1); |
| 443 | } |
| 444 | if ((indx = findname(string, "third", bufpp, &inetlist)) == -1) |
| 445 | return (-1); |
| 446 | mib[2] = indx; |
| 447 | if (indx <= IPPROTO_UDP && inetvars[indx].list != NULL) |
| 448 | lp = &inetvars[indx]; |
| 449 | else if (!flags) |
| 450 | return (-1); |
| 451 | else { |
| 452 | fprintf(stderr, "%s: no variables defined for this protocol\n", |
| 453 | string); |
| 454 | return (-1); |
| 455 | } |
| 456 | if (*bufpp == NULL) { |
| 457 | listall(string, lp); |
| 458 | return (-1); |
| 459 | } |
| 460 | if ((indx = findname(string, "fourth", bufpp, lp)) == -1) |
| 461 | return (-1); |
| 462 | mib[3] = indx; |
| 463 | *typep = lp->list[indx].ctl_type; |
| 464 | return (4); |
| 465 | } |
| 466 | |
| 467 | /* |
| 468 | * Scan a list of names searching for a particular name. |
| 469 | */ |
| 470 | findname(string, level, bufp, namelist) |
| 471 | char *string; |
| 472 | char *level; |
| 473 | char **bufp; |
| 474 | struct list *namelist; |
| 475 | { |
| 476 | char *name; |
| 477 | int i; |
| 478 | |
| 479 | if (namelist->list == 0 || (name = strsep(bufp, ".")) == NULL) { |
| 480 | fprintf(stderr, "%s: incomplete specification\n", string); |
| 481 | return (-1); |
| 482 | } |
| 483 | for (i = 0; i < namelist->size; i++) |
| 484 | if (namelist->list[i].ctl_name != NULL && |
| 485 | strcmp(name, namelist->list[i].ctl_name) == 0) |
| 486 | break; |
| 487 | if (i == namelist->size) { |
| 488 | fprintf(stderr, "%s level name %s in %s is invalid\n", |
| 489 | level, name, string); |
| 490 | return (-1); |
| 491 | } |
| 492 | return (i); |
| 493 | } |
| 494 | |
| 495 | usage() |
| 496 | { |
| 497 | |
| 498 | (void)fprintf(stderr, "usage:\t%s\n\t%s\n\t%s\n\t%s\n", |
| 499 | "sysctl [-n] variable ...", "sysctl [-n] -w variable=value ...", |
| 500 | "sysctl [-n] -a", "sysctl [-n] -A"); |
| 501 | exit(1); |
| 502 | } |