Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_xxx.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
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1 /*- 2 * Copyright (c) 1982, 1986, 1989, 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 * @(#)kern_xxx.c 8.2 (Berkeley) 11/14/93 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_compat.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/sysproto.h> 40 #include <sys/kernel.h> 41 #include <sys/priv.h> 42 #include <sys/proc.h> 43 #include <sys/lock.h> 44 #include <sys/mutex.h> 45 #include <sys/socket.h> 46 #include <sys/sysctl.h> 47 #include <sys/utsname.h> 48 49 #include <vm/vm_param.h> 50 51 #if defined(COMPAT_43) 52 53 #ifndef _SYS_SYSPROTO_H_ 54 struct gethostname_args { 55 char *hostname; 56 u_int len; 57 }; 58 #endif 59 /* ARGSUSED */ 60 int 61 ogethostname(td, uap) 62 struct thread *td; 63 struct gethostname_args *uap; 64 { 65 int name[2]; 66 size_t len = uap->len; 67 68 name[0] = CTL_KERN; 69 name[1] = KERN_HOSTNAME; 70 return (userland_sysctl(td, name, 2, uap->hostname, &len, 71 1, 0, 0, 0, 0)); 72 } 73 74 #ifndef _SYS_SYSPROTO_H_ 75 struct sethostname_args { 76 char *hostname; 77 u_int len; 78 }; 79 #endif 80 /* ARGSUSED */ 81 int 82 osethostname(td, uap) 83 struct thread *td; 84 register struct sethostname_args *uap; 85 { 86 int name[2]; 87 88 name[0] = CTL_KERN; 89 name[1] = KERN_HOSTNAME; 90 return (userland_sysctl(td, name, 2, 0, 0, 0, uap->hostname, 91 uap->len, 0, 0)); 92 } 93 94 #ifndef _SYS_SYSPROTO_H_ 95 struct ogethostid_args { 96 int dummy; 97 }; 98 #endif 99 /* ARGSUSED */ 100 int 101 ogethostid(td, uap) 102 struct thread *td; 103 struct ogethostid_args *uap; 104 { 105 106 *(long *)(td->td_retval) = hostid; 107 return (0); 108 } 109 #endif /* COMPAT_43 */ 110 111 #ifdef COMPAT_43 112 #ifndef _SYS_SYSPROTO_H_ 113 struct osethostid_args { 114 long hostid; 115 }; 116 #endif 117 /* ARGSUSED */ 118 int 119 osethostid(td, uap) 120 struct thread *td; 121 struct osethostid_args *uap; 122 { 123 int error; 124 125 error = priv_check(td, PRIV_SETHOSTID); 126 if (error) 127 return (error); 128 mtx_lock(&Giant); 129 hostid = uap->hostid; 130 mtx_unlock(&Giant); 131 return (0); 132 } 133 134 int 135 oquota(td, uap) 136 struct thread *td; 137 struct oquota_args *uap; 138 { 139 140 return (ENOSYS); 141 } 142 143 #define KINFO_PROC (0<<8) 144 #define KINFO_RT (1<<8) 145 #define KINFO_VNODE (2<<8) 146 #define KINFO_FILE (3<<8) 147 #define KINFO_METER (4<<8) 148 #define KINFO_LOADAVG (5<<8) 149 #define KINFO_CLOCKRATE (6<<8) 150 151 /* Non-standard BSDI extension - only present on their 4.3 net-2 releases */ 152 #define KINFO_BSDI_SYSINFO (101<<8) 153 154 /* 155 * XXX this is bloat, but I hope it's better here than on the potentially 156 * limited kernel stack... -Peter 157 */ 158 159 static struct { 160 int bsdi_machine; /* "i386" on BSD/386 */ 161 /* ^^^ this is an offset to the string, relative to the struct start */ 162 char *pad0; 163 long pad1; 164 long pad2; 165 long pad3; 166 u_long pad4; 167 u_long pad5; 168 u_long pad6; 169 170 int bsdi_ostype; /* "BSD/386" on BSD/386 */ 171 int bsdi_osrelease; /* "1.1" on BSD/386 */ 172 long pad7; 173 long pad8; 174 char *pad9; 175 176 long pad10; 177 long pad11; 178 int pad12; 179 long pad13; 180 quad_t pad14; 181 long pad15; 182 183 struct timeval pad16; 184 /* we dont set this, because BSDI's uname used gethostname() instead */ 185 int bsdi_hostname; /* hostname on BSD/386 */ 186 187 /* the actual string data is appended here */ 188 189 } bsdi_si; 190 191 /* 192 * this data is appended to the end of the bsdi_si structure during copyout. 193 * The "char *" offsets are relative to the base of the bsdi_si struct. 194 * This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings 195 * should not exceed the length of the buffer here... (or else!! :-) 196 */ 197 static char bsdi_strings[80]; /* It had better be less than this! */ 198 199 #ifndef _SYS_SYSPROTO_H_ 200 struct getkerninfo_args { 201 int op; 202 char *where; 203 size_t *size; 204 int arg; 205 }; 206 #endif 207 int 208 ogetkerninfo(struct thread *td, struct getkerninfo_args *uap) 209 { 210 int error, name[6]; 211 size_t size; 212 u_int needed = 0; 213 214 switch (uap->op & 0xff00) { 215 216 case KINFO_RT: 217 name[0] = CTL_NET; 218 name[1] = PF_ROUTE; 219 name[2] = 0; 220 name[3] = (uap->op & 0xff0000) >> 16; 221 name[4] = uap->op & 0xff; 222 name[5] = uap->arg; 223 error = userland_sysctl(td, name, 6, uap->where, uap->size, 224 0, 0, 0, &size, 0); 225 break; 226 227 case KINFO_VNODE: 228 name[0] = CTL_KERN; 229 name[1] = KERN_VNODE; 230 error = userland_sysctl(td, name, 2, uap->where, uap->size, 231 0, 0, 0, &size, 0); 232 break; 233 234 case KINFO_PROC: 235 name[0] = CTL_KERN; 236 name[1] = KERN_PROC; 237 name[2] = uap->op & 0xff; 238 name[3] = uap->arg; 239 error = userland_sysctl(td, name, 4, uap->where, uap->size, 240 0, 0, 0, &size, 0); 241 break; 242 243 case KINFO_FILE: 244 name[0] = CTL_KERN; 245 name[1] = KERN_FILE; 246 error = userland_sysctl(td, name, 2, uap->where, uap->size, 247 0, 0, 0, &size, 0); 248 break; 249 250 case KINFO_METER: 251 name[0] = CTL_VM; 252 name[1] = VM_TOTAL; 253 error = userland_sysctl(td, name, 2, uap->where, uap->size, 254 0, 0, 0, &size, 0); 255 break; 256 257 case KINFO_LOADAVG: 258 name[0] = CTL_VM; 259 name[1] = VM_LOADAVG; 260 error = userland_sysctl(td, name, 2, uap->where, uap->size, 261 0, 0, 0, &size, 0); 262 break; 263 264 case KINFO_CLOCKRATE: 265 name[0] = CTL_KERN; 266 name[1] = KERN_CLOCKRATE; 267 error = userland_sysctl(td, name, 2, uap->where, uap->size, 268 0, 0, 0, &size, 0); 269 break; 270 271 case KINFO_BSDI_SYSINFO: { 272 /* 273 * this is pretty crude, but it's just enough for uname() 274 * from BSDI's 1.x libc to work. 275 * 276 * *size gives the size of the buffer before the call, and 277 * the amount of data copied after a successful call. 278 * If successful, the return value is the amount of data 279 * available, which can be larger than *size. 280 * 281 * BSDI's 2.x product apparently fails with ENOMEM if *size 282 * is too small. 283 */ 284 285 u_int left; 286 char *s; 287 288 bzero((char *)&bsdi_si, sizeof(bsdi_si)); 289 bzero(bsdi_strings, sizeof(bsdi_strings)); 290 291 s = bsdi_strings; 292 293 bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si); 294 strcpy(s, ostype); 295 s += strlen(s) + 1; 296 297 bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si); 298 strcpy(s, osrelease); 299 s += strlen(s) + 1; 300 301 bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si); 302 strcpy(s, machine); 303 s += strlen(s) + 1; 304 305 needed = sizeof(bsdi_si) + (s - bsdi_strings); 306 307 if ((uap->where == NULL) || (uap->size == NULL)) { 308 /* process is asking how much buffer to supply.. */ 309 size = needed; 310 error = 0; 311 break; 312 } 313 314 if ((error = copyin(uap->size, &size, sizeof(size))) != 0) 315 break; 316 317 /* if too much buffer supplied, trim it down */ 318 if (size > needed) 319 size = needed; 320 321 /* how much of the buffer is remaining */ 322 left = size; 323 324 if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0) 325 break; 326 327 /* is there any point in continuing? */ 328 if (left > sizeof(bsdi_si)) { 329 left -= sizeof(bsdi_si); 330 error = copyout(&bsdi_strings, 331 uap->where + sizeof(bsdi_si), left); 332 } 333 break; 334 } 335 336 default: 337 error = EOPNOTSUPP; 338 break; 339 } 340 if (error == 0) { 341 td->td_retval[0] = needed ? needed : size; 342 if (uap->size) { 343 error = copyout(&size, uap->size, sizeof(size)); 344 } 345 } 346 return (error); 347 } 348 #endif /* COMPAT_43 */ 349 350 /* 351 * This is the FreeBSD-1.1 compatable uname(2) interface. These days it is 352 * done in libc as a wrapper around a bunch of sysctl's. This must maintain 353 * the old 1.1 binary ABI. 354 */ 355 #if SYS_NMLN != 32 356 #error "FreeBSD-1.1 uname syscall has been broken" 357 #endif 358 #ifndef _SYS_SYSPROTO_H_ 359 struct uname_args { 360 struct utsname *name; 361 }; 362 #endif 363 /* ARGSUSED */ 364 int 365 uname(td, uap) 366 struct thread *td; 367 struct uname_args *uap; 368 { 369 int name[2], error; 370 size_t len; 371 char *s, *us; 372 373 name[0] = CTL_KERN; 374 name[1] = KERN_OSTYPE; 375 len = sizeof (uap->name->sysname); 376 error = userland_sysctl(td, name, 2, uap->name->sysname, &len, 377 1, 0, 0, 0, 0); 378 if (error) 379 return (error); 380 subyte( uap->name->sysname + sizeof(uap->name->sysname) - 1, 0); 381 382 name[1] = KERN_HOSTNAME; 383 len = sizeof uap->name->nodename; 384 error = userland_sysctl(td, name, 2, uap->name->nodename, &len, 385 1, 0, 0, 0, 0); 386 if (error) 387 return (error); 388 subyte( uap->name->nodename + sizeof(uap->name->nodename) - 1, 0); 389 390 name[1] = KERN_OSRELEASE; 391 len = sizeof uap->name->release; 392 error = userland_sysctl(td, name, 2, uap->name->release, &len, 393 1, 0, 0, 0, 0); 394 if (error) 395 return (error); 396 subyte( uap->name->release + sizeof(uap->name->release) - 1, 0); 397 398 /* 399 name = KERN_VERSION; 400 len = sizeof uap->name->version; 401 error = userland_sysctl(td, name, 2, uap->name->version, &len, 402 1, 0, 0, 0, 0); 403 if (error) 404 return (error); 405 subyte( uap->name->version + sizeof(uap->name->version) - 1, 0); 406 */ 407 408 /* 409 * this stupid hackery to make the version field look like FreeBSD 1.1 410 */ 411 for(s = version; *s && *s != '#'; s++); 412 413 for(us = uap->name->version; *s && *s != ':'; s++) { 414 error = subyte( us++, *s); 415 if (error) 416 return (error); 417 } 418 error = subyte( us++, 0); 419 if (error) 420 return (error); 421 422 name[0] = CTL_HW; 423 name[1] = HW_MACHINE; 424 len = sizeof uap->name->machine; 425 error = userland_sysctl(td, name, 2, uap->name->machine, &len, 426 1, 0, 0, 0, 0); 427 if (error) 428 return (error); 429 subyte( uap->name->machine + sizeof(uap->name->machine) - 1, 0); 430 return (0); 431 } 432 433 #ifndef _SYS_SYSPROTO_H_ 434 struct getdomainname_args { 435 char *domainname; 436 int len; 437 }; 438 #endif 439 /* ARGSUSED */ 440 int 441 getdomainname(td, uap) 442 struct thread *td; 443 struct getdomainname_args *uap; 444 { 445 int domainnamelen; 446 int error; 447 448 mtx_lock(&Giant); 449 domainnamelen = strlen(domainname) + 1; 450 if ((u_int)uap->len > domainnamelen) 451 uap->len = domainnamelen; 452 error = copyout(domainname, uap->domainname, uap->len); 453 mtx_unlock(&Giant); 454 return (error); 455 } 456 457 #ifndef _SYS_SYSPROTO_H_ 458 struct setdomainname_args { 459 char *domainname; 460 int len; 461 }; 462 #endif 463 /* ARGSUSED */ 464 int 465 setdomainname(td, uap) 466 struct thread *td; 467 struct setdomainname_args *uap; 468 { 469 int error, domainnamelen; 470 471 error = priv_check(td, PRIV_SETDOMAINNAME); 472 if (error) 473 return (error); 474 mtx_lock(&Giant); 475 if ((u_int)uap->len > sizeof (domainname) - 1) { 476 error = EINVAL; 477 goto done2; 478 } 479 domainnamelen = uap->len; 480 error = copyin(uap->domainname, domainname, uap->len); 481 domainname[domainnamelen] = 0; 482 done2: 483 mtx_unlock(&Giant); 484 return (error); 485 }
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