1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)kern_xxx.c 8.2 (Berkeley) 11/14/93 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 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(struct thread *td, struct gethostname_args *uap) 62 { 63 int name[2]; 64 size_t len = uap->len; 65 66 name[0] = CTL_KERN; 67 name[1] = KERN_HOSTNAME; 68 return (userland_sysctl(td, name, 2, uap->hostname, &len, 69 1, 0, 0, 0, 0)); 70 } 71 72 #ifndef _SYS_SYSPROTO_H_ 73 struct sethostname_args { 74 char *hostname; 75 u_int len; 76 }; 77 #endif 78 /* ARGSUSED */ 79 int 80 osethostname(struct thread *td, struct sethostname_args *uap) 81 { 82 int name[2]; 83 84 name[0] = CTL_KERN; 85 name[1] = KERN_HOSTNAME; 86 return (userland_sysctl(td, name, 2, 0, 0, 0, uap->hostname, 87 uap->len, 0, 0)); 88 } 89 90 #ifndef _SYS_SYSPROTO_H_ 91 struct ogethostid_args { 92 int dummy; 93 }; 94 #endif 95 /* ARGSUSED */ 96 int 97 ogethostid(struct thread *td, struct ogethostid_args *uap) 98 { 99 size_t len = sizeof(long); 100 int name[2]; 101 102 name[0] = CTL_KERN; 103 name[1] = KERN_HOSTID; 104 return (kernel_sysctl(td, name, 2, (long *)td->td_retval, &len, 105 NULL, 0, NULL, 0)); 106 } 107 #endif /* COMPAT_43 */ 108 109 #ifdef COMPAT_43 110 #ifndef _SYS_SYSPROTO_H_ 111 struct osethostid_args { 112 long hostid; 113 }; 114 #endif 115 /* ARGSUSED */ 116 int 117 osethostid(struct thread *td, struct osethostid_args *uap) 118 { 119 int name[2]; 120 121 name[0] = CTL_KERN; 122 name[1] = KERN_HOSTID; 123 return (kernel_sysctl(td, name, 2, NULL, NULL, &uap->hostid, 124 sizeof(uap->hostid), NULL, 0)); 125 } 126 127 int 128 oquota(struct thread *td, struct oquota_args *uap) 129 { 130 131 return (ENOSYS); 132 } 133 134 #define KINFO_PROC (0<<8) 135 #define KINFO_RT (1<<8) 136 #define KINFO_VNODE (2<<8) 137 #define KINFO_FILE (3<<8) 138 #define KINFO_METER (4<<8) 139 #define KINFO_LOADAVG (5<<8) 140 #define KINFO_CLOCKRATE (6<<8) 141 142 /* Non-standard BSDI extension - only present on their 4.3 net-2 releases */ 143 #define KINFO_BSDI_SYSINFO (101<<8) 144 145 /* 146 * XXX this is bloat, but I hope it's better here than on the potentially 147 * limited kernel stack... -Peter 148 */ 149 150 static struct { 151 int bsdi_machine; /* "i386" on BSD/386 */ 152 /* ^^^ this is an offset to the string, relative to the struct start */ 153 char *pad0; 154 long pad1; 155 long pad2; 156 long pad3; 157 u_long pad4; 158 u_long pad5; 159 u_long pad6; 160 161 int bsdi_ostype; /* "BSD/386" on BSD/386 */ 162 int bsdi_osrelease; /* "1.1" on BSD/386 */ 163 long pad7; 164 long pad8; 165 char *pad9; 166 167 long pad10; 168 long pad11; 169 int pad12; 170 long pad13; 171 quad_t pad14; 172 long pad15; 173 174 struct timeval pad16; 175 /* we dont set this, because BSDI's uname used gethostname() instead */ 176 int bsdi_hostname; /* hostname on BSD/386 */ 177 178 /* the actual string data is appended here */ 179 180 } bsdi_si; 181 182 /* 183 * this data is appended to the end of the bsdi_si structure during copyout. 184 * The "char *" offsets are relative to the base of the bsdi_si struct. 185 * This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings 186 * should not exceed the length of the buffer here... (or else!! :-) 187 */ 188 static char bsdi_strings[80]; /* It had better be less than this! */ 189 190 #ifndef _SYS_SYSPROTO_H_ 191 struct getkerninfo_args { 192 int op; 193 char *where; 194 size_t *size; 195 int arg; 196 }; 197 #endif 198 int 199 ogetkerninfo(struct thread *td, struct getkerninfo_args *uap) 200 { 201 int error, name[6]; 202 size_t size; 203 u_int needed = 0; 204 205 switch (uap->op & 0xff00) { 206 207 case KINFO_RT: 208 name[0] = CTL_NET; 209 name[1] = PF_ROUTE; 210 name[2] = 0; 211 name[3] = (uap->op & 0xff0000) >> 16; 212 name[4] = uap->op & 0xff; 213 name[5] = uap->arg; 214 error = userland_sysctl(td, name, 6, uap->where, uap->size, 215 0, 0, 0, &size, 0); 216 break; 217 218 case KINFO_VNODE: 219 name[0] = CTL_KERN; 220 name[1] = KERN_VNODE; 221 error = userland_sysctl(td, name, 2, uap->where, uap->size, 222 0, 0, 0, &size, 0); 223 break; 224 225 case KINFO_PROC: 226 name[0] = CTL_KERN; 227 name[1] = KERN_PROC; 228 name[2] = uap->op & 0xff; 229 name[3] = uap->arg; 230 error = userland_sysctl(td, name, 4, uap->where, uap->size, 231 0, 0, 0, &size, 0); 232 break; 233 234 case KINFO_FILE: 235 name[0] = CTL_KERN; 236 name[1] = KERN_FILE; 237 error = userland_sysctl(td, name, 2, uap->where, uap->size, 238 0, 0, 0, &size, 0); 239 break; 240 241 case KINFO_METER: 242 name[0] = CTL_VM; 243 name[1] = VM_TOTAL; 244 error = userland_sysctl(td, name, 2, uap->where, uap->size, 245 0, 0, 0, &size, 0); 246 break; 247 248 case KINFO_LOADAVG: 249 name[0] = CTL_VM; 250 name[1] = VM_LOADAVG; 251 error = userland_sysctl(td, name, 2, uap->where, uap->size, 252 0, 0, 0, &size, 0); 253 break; 254 255 case KINFO_CLOCKRATE: 256 name[0] = CTL_KERN; 257 name[1] = KERN_CLOCKRATE; 258 error = userland_sysctl(td, name, 2, uap->where, uap->size, 259 0, 0, 0, &size, 0); 260 break; 261 262 case KINFO_BSDI_SYSINFO: { 263 /* 264 * this is pretty crude, but it's just enough for uname() 265 * from BSDI's 1.x libc to work. 266 * 267 * *size gives the size of the buffer before the call, and 268 * the amount of data copied after a successful call. 269 * If successful, the return value is the amount of data 270 * available, which can be larger than *size. 271 * 272 * BSDI's 2.x product apparently fails with ENOMEM if *size 273 * is too small. 274 */ 275 276 u_int left; 277 char *s; 278 279 bzero((char *)&bsdi_si, sizeof(bsdi_si)); 280 bzero(bsdi_strings, sizeof(bsdi_strings)); 281 282 s = bsdi_strings; 283 284 bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si); 285 strcpy(s, ostype); 286 s += strlen(s) + 1; 287 288 bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si); 289 strcpy(s, osrelease); 290 s += strlen(s) + 1; 291 292 bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si); 293 strcpy(s, machine); 294 s += strlen(s) + 1; 295 296 needed = sizeof(bsdi_si) + (s - bsdi_strings); 297 298 if ((uap->where == NULL) || (uap->size == NULL)) { 299 /* process is asking how much buffer to supply.. */ 300 size = needed; 301 error = 0; 302 break; 303 } 304 305 if ((error = copyin(uap->size, &size, sizeof(size))) != 0) 306 break; 307 308 /* if too much buffer supplied, trim it down */ 309 if (size > needed) 310 size = needed; 311 312 /* how much of the buffer is remaining */ 313 left = size; 314 315 if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0) 316 break; 317 318 /* is there any point in continuing? */ 319 if (left > sizeof(bsdi_si)) { 320 left -= sizeof(bsdi_si); 321 error = copyout(&bsdi_strings, 322 uap->where + sizeof(bsdi_si), left); 323 } 324 break; 325 } 326 327 default: 328 error = EOPNOTSUPP; 329 break; 330 } 331 if (error == 0) { 332 td->td_retval[0] = needed ? needed : size; 333 if (uap->size) { 334 error = copyout(&size, uap->size, sizeof(size)); 335 } 336 } 337 return (error); 338 } 339 #endif /* COMPAT_43 */ 340 341 #ifdef COMPAT_FREEBSD4 342 /* 343 * This is the FreeBSD-1.1 compatible uname(2) interface. These days it is 344 * done in libc as a wrapper around a bunch of sysctl's. This must maintain 345 * the old 1.1 binary ABI. 346 */ 347 #if SYS_NMLN != 32 348 #error "FreeBSD-1.1 uname syscall has been broken" 349 #endif 350 #ifndef _SYS_SYSPROTO_H_ 351 struct uname_args { 352 struct utsname *name; 353 }; 354 #endif 355 /* ARGSUSED */ 356 int 357 freebsd4_uname(struct thread *td, struct freebsd4_uname_args *uap) 358 { 359 int name[2], error; 360 size_t len; 361 char *s, *us; 362 363 name[0] = CTL_KERN; 364 name[1] = KERN_OSTYPE; 365 len = sizeof (uap->name->sysname); 366 error = userland_sysctl(td, name, 2, uap->name->sysname, &len, 367 1, 0, 0, 0, 0); 368 if (error) 369 return (error); 370 subyte( uap->name->sysname + sizeof(uap->name->sysname) - 1, 0); 371 372 name[1] = KERN_HOSTNAME; 373 len = sizeof uap->name->nodename; 374 error = userland_sysctl(td, name, 2, uap->name->nodename, &len, 375 1, 0, 0, 0, 0); 376 if (error) 377 return (error); 378 subyte( uap->name->nodename + sizeof(uap->name->nodename) - 1, 0); 379 380 name[1] = KERN_OSRELEASE; 381 len = sizeof uap->name->release; 382 error = userland_sysctl(td, name, 2, uap->name->release, &len, 383 1, 0, 0, 0, 0); 384 if (error) 385 return (error); 386 subyte( uap->name->release + sizeof(uap->name->release) - 1, 0); 387 388 /* 389 name = KERN_VERSION; 390 len = sizeof uap->name->version; 391 error = userland_sysctl(td, name, 2, uap->name->version, &len, 392 1, 0, 0, 0, 0); 393 if (error) 394 return (error); 395 subyte( uap->name->version + sizeof(uap->name->version) - 1, 0); 396 */ 397 398 /* 399 * this stupid hackery to make the version field look like FreeBSD 1.1 400 */ 401 for(s = version; *s && *s != '#'; s++); 402 403 for(us = uap->name->version; *s && *s != ':'; s++) { 404 error = subyte( us++, *s); 405 if (error) 406 return (error); 407 } 408 error = subyte( us++, 0); 409 if (error) 410 return (error); 411 412 name[0] = CTL_HW; 413 name[1] = HW_MACHINE; 414 len = sizeof uap->name->machine; 415 error = userland_sysctl(td, name, 2, uap->name->machine, &len, 416 1, 0, 0, 0, 0); 417 if (error) 418 return (error); 419 subyte( uap->name->machine + sizeof(uap->name->machine) - 1, 0); 420 return (0); 421 } 422 423 #ifndef _SYS_SYSPROTO_H_ 424 struct getdomainname_args { 425 char *domainname; 426 int len; 427 }; 428 #endif 429 /* ARGSUSED */ 430 int 431 freebsd4_getdomainname(struct thread *td, 432 struct freebsd4_getdomainname_args *uap) 433 { 434 int name[2]; 435 size_t len = uap->len; 436 437 name[0] = CTL_KERN; 438 name[1] = KERN_NISDOMAINNAME; 439 return (userland_sysctl(td, name, 2, uap->domainname, &len, 440 1, 0, 0, 0, 0)); 441 } 442 443 #ifndef _SYS_SYSPROTO_H_ 444 struct setdomainname_args { 445 char *domainname; 446 int len; 447 }; 448 #endif 449 /* ARGSUSED */ 450 int 451 freebsd4_setdomainname(struct thread *td, 452 struct freebsd4_setdomainname_args *uap) 453 { 454 int name[2]; 455 456 name[0] = CTL_KERN; 457 name[1] = KERN_NISDOMAINNAME; 458 return (userland_sysctl(td, name, 2, 0, 0, 0, uap->domainname, 459 uap->len, 0, 0)); 460 } 461 #endif /* COMPAT_FREEBSD4 */ 462