kern_sysctl.c revision 1.86.2.12
1 /* $NetBSD: kern_sysctl.c,v 1.86.2.12 2002/02/28 04:14:44 nathanw Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95 39 */ 40 41 /* 42 * sysctl system call. 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: kern_sysctl.c,v 1.86.2.12 2002/02/28 04:14:44 nathanw Exp $"); 47 48 #include "opt_ddb.h" 49 #include "opt_insecure.h" 50 #include "opt_defcorename.h" 51 #include "opt_pipe.h" 52 #include "opt_sysv.h" 53 #include "pty.h" 54 55 #include <sys/param.h> 56 #include <sys/systm.h> 57 #include <sys/kernel.h> 58 #include <sys/buf.h> 59 #include <sys/device.h> 60 #include <sys/disklabel.h> 61 #include <sys/dkstat.h> 62 #include <sys/exec.h> 63 #include <sys/file.h> 64 #include <sys/ioctl.h> 65 #include <sys/malloc.h> 66 #include <sys/mount.h> 67 #include <sys/msgbuf.h> 68 #include <sys/pool.h> 69 #include <sys/lwp.h> 70 #include <sys/proc.h> 71 #include <sys/resource.h> 72 #include <sys/resourcevar.h> 73 #include <sys/syscallargs.h> 74 #include <sys/tty.h> 75 #include <sys/unistd.h> 76 #include <sys/vnode.h> 77 #include <sys/socketvar.h> 78 #define __SYSCTL_PRIVATE 79 #include <sys/sysctl.h> 80 #include <sys/lock.h> 81 #include <sys/namei.h> 82 83 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 84 #include <sys/ipc.h> 85 #endif 86 #ifdef SYSVMSG 87 #include <sys/msg.h> 88 #endif 89 #ifdef SYSVSEM 90 #include <sys/sem.h> 91 #endif 92 #ifdef SYSVSHM 93 #include <sys/shm.h> 94 #endif 95 96 #include <dev/cons.h> 97 98 #if defined(DDB) 99 #include <ddb/ddbvar.h> 100 #endif 101 102 #ifndef PIPE_SOCKETPAIR 103 #include <sys/pipe.h> 104 #endif 105 106 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 107 108 static int sysctl_file(void *, size_t *); 109 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 110 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 111 #endif 112 static int sysctl_msgbuf(void *, size_t *); 113 static int sysctl_doeproc(int *, u_int, void *, size_t *); 114 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 115 #ifdef MULTIPROCESSOR 116 static int sysctl_docptime(void *, size_t *, void *); 117 static int sysctl_ncpus(void); 118 #endif 119 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 120 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 121 #if NPTY > 0 122 static int sysctl_pty(void *, size_t *, void *, size_t); 123 #endif 124 125 /* 126 * The `sysctl_memlock' is intended to keep too many processes from 127 * locking down memory by doing sysctls at once. Whether or not this 128 * is really a good idea to worry about it probably a subject of some 129 * debate. 130 */ 131 struct lock sysctl_memlock; 132 133 void 134 sysctl_init(void) 135 { 136 137 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 138 } 139 140 int 141 sys___sysctl(struct lwp *l, void *v, register_t *retval) 142 { 143 struct sys___sysctl_args /* { 144 syscallarg(int *) name; 145 syscallarg(u_int) namelen; 146 syscallarg(void *) old; 147 syscallarg(size_t *) oldlenp; 148 syscallarg(void *) new; 149 syscallarg(size_t) newlen; 150 } */ *uap = v; 151 struct proc *p = l->l_proc; 152 int error; 153 size_t savelen = 0, oldlen = 0; 154 sysctlfn *fn; 155 int name[CTL_MAXNAME]; 156 size_t *oldlenp; 157 158 /* 159 * all top-level sysctl names are non-terminal 160 */ 161 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 162 return (EINVAL); 163 error = copyin(SCARG(uap, name), &name, 164 SCARG(uap, namelen) * sizeof(int)); 165 if (error) 166 return (error); 167 168 /* 169 * For all but CTL_PROC, must be root to change a value. 170 * For CTL_PROC, must be root, or owner of the proc (and not suid), 171 * this is checked in proc_sysctl() (once we know the targer proc). 172 */ 173 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 174 (error = suser(p->p_ucred, &p->p_acflag))) 175 return error; 176 177 switch (name[0]) { 178 case CTL_KERN: 179 fn = kern_sysctl; 180 break; 181 case CTL_HW: 182 fn = hw_sysctl; 183 break; 184 case CTL_VM: 185 fn = uvm_sysctl; 186 break; 187 case CTL_NET: 188 fn = net_sysctl; 189 break; 190 case CTL_VFS: 191 fn = vfs_sysctl; 192 break; 193 case CTL_MACHDEP: 194 fn = cpu_sysctl; 195 break; 196 #ifdef DEBUG 197 case CTL_DEBUG: 198 fn = debug_sysctl; 199 break; 200 #endif 201 #ifdef DDB 202 case CTL_DDB: 203 fn = ddb_sysctl; 204 break; 205 #endif 206 case CTL_PROC: 207 fn = proc_sysctl; 208 break; 209 default: 210 return (EOPNOTSUPP); 211 } 212 213 /* 214 * XXX Hey, we wire `old', but what about `new'? 215 */ 216 217 oldlenp = SCARG(uap, oldlenp); 218 if (oldlenp) { 219 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 220 return (error); 221 oldlenp = &oldlen; 222 } 223 if (SCARG(uap, old) != NULL) { 224 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 225 if (error) 226 return (error); 227 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 228 if (error) { 229 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 230 return error; 231 } 232 savelen = oldlen; 233 } 234 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 235 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 236 if (SCARG(uap, old) != NULL) { 237 uvm_vsunlock(p, SCARG(uap, old), savelen); 238 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 239 } 240 if (error) 241 return (error); 242 if (SCARG(uap, oldlenp)) 243 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 244 return (error); 245 } 246 247 /* 248 * Attributes stored in the kernel. 249 */ 250 char hostname[MAXHOSTNAMELEN]; 251 int hostnamelen; 252 253 char domainname[MAXHOSTNAMELEN]; 254 int domainnamelen; 255 256 long hostid; 257 258 #ifdef INSECURE 259 int securelevel = -1; 260 #else 261 int securelevel = 0; 262 #endif 263 264 #ifndef DEFCORENAME 265 #define DEFCORENAME "%n.core" 266 #endif 267 char defcorename[MAXPATHLEN] = DEFCORENAME; 268 int defcorenamelen = sizeof(DEFCORENAME); 269 270 extern int kern_logsigexit; 271 extern fixpt_t ccpu; 272 273 #ifndef MULTIPROCESSOR 274 #define sysctl_ncpus() 1 275 #endif 276 277 #ifdef MULTIPROCESSOR 278 279 #ifndef CPU_INFO_FOREACH 280 #define CPU_INFO_ITERATOR int 281 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 282 #endif 283 284 static int 285 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 286 { 287 u_int64_t cp_time[CPUSTATES]; 288 int i; 289 struct cpu_info *ci; 290 CPU_INFO_ITERATOR cii; 291 292 for (i=0; i<CPUSTATES; i++) 293 cp_time[i] = 0; 294 295 for (CPU_INFO_FOREACH(cii, ci)) { 296 for (i=0; i<CPUSTATES; i++) 297 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 298 } 299 return (sysctl_rdstruct(oldp, oldlenp, newp, 300 cp_time, sizeof(cp_time))); 301 } 302 303 static int 304 sysctl_ncpus(void) 305 { 306 struct cpu_info *ci; 307 CPU_INFO_ITERATOR cii; 308 309 int ncpus = 0; 310 for (CPU_INFO_FOREACH(cii, ci)) 311 ncpus++; 312 return ncpus; 313 } 314 315 #endif 316 317 /* 318 * kernel related system variables. 319 */ 320 int 321 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 322 void *newp, size_t newlen, struct proc *p) 323 { 324 int error, level, inthostid; 325 int old_autonicetime; 326 int old_vnodes; 327 dev_t consdev; 328 329 /* All sysctl names at this level, except for a few, are terminal. */ 330 switch (name[0]) { 331 case KERN_PROC: 332 case KERN_PROC2: 333 case KERN_PROF: 334 case KERN_MBUF: 335 case KERN_PROC_ARGS: 336 case KERN_SYSVIPC_INFO: 337 case KERN_PIPE: 338 case KERN_TKSTAT: 339 /* Not terminal. */ 340 break; 341 default: 342 if (namelen != 1) 343 return (ENOTDIR); /* overloaded */ 344 } 345 346 switch (name[0]) { 347 case KERN_OSTYPE: 348 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 349 case KERN_OSRELEASE: 350 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 351 case KERN_OSREV: 352 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 353 case KERN_VERSION: 354 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 355 case KERN_MAXVNODES: 356 old_vnodes = desiredvnodes; 357 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 358 if (newp && !error) { 359 if (old_vnodes > desiredvnodes) { 360 desiredvnodes = old_vnodes; 361 return (EINVAL); 362 } 363 vfs_reinit(); 364 nchreinit(); 365 } 366 return (error); 367 case KERN_MAXPROC: 368 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 369 case KERN_MAXFILES: 370 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 371 case KERN_ARGMAX: 372 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 373 case KERN_SECURELVL: 374 level = securelevel; 375 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 376 newp == NULL) 377 return (error); 378 if (level < securelevel && p->p_pid != 1) 379 return (EPERM); 380 securelevel = level; 381 return (0); 382 case KERN_HOSTNAME: 383 error = sysctl_string(oldp, oldlenp, newp, newlen, 384 hostname, sizeof(hostname)); 385 if (newp && !error) 386 hostnamelen = newlen; 387 return (error); 388 case KERN_DOMAINNAME: 389 error = sysctl_string(oldp, oldlenp, newp, newlen, 390 domainname, sizeof(domainname)); 391 if (newp && !error) 392 domainnamelen = newlen; 393 return (error); 394 case KERN_HOSTID: 395 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 396 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 397 if (newp && !error) 398 hostid = inthostid; 399 return (error); 400 case KERN_CLOCKRATE: 401 return (sysctl_clockrate(oldp, oldlenp)); 402 case KERN_BOOTTIME: 403 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 404 sizeof(struct timeval))); 405 case KERN_VNODE: 406 return (sysctl_vnode(oldp, oldlenp, p)); 407 case KERN_PROC: 408 case KERN_PROC2: 409 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 410 case KERN_PROC_ARGS: 411 return (sysctl_procargs(name + 1, namelen - 1, 412 oldp, oldlenp, p)); 413 case KERN_FILE: 414 return (sysctl_file(oldp, oldlenp)); 415 #ifdef GPROF 416 case KERN_PROF: 417 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 418 newp, newlen)); 419 #endif 420 case KERN_POSIX1: 421 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 422 case KERN_NGROUPS: 423 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 424 case KERN_JOB_CONTROL: 425 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 426 case KERN_SAVED_IDS: 427 #ifdef _POSIX_SAVED_IDS 428 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 429 #else 430 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 431 #endif 432 case KERN_MAXPARTITIONS: 433 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 434 case KERN_RAWPARTITION: 435 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 436 #ifdef NTP 437 case KERN_NTPTIME: 438 return (sysctl_ntptime(oldp, oldlenp)); 439 #endif 440 case KERN_AUTONICETIME: 441 old_autonicetime = autonicetime; 442 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 443 if (autonicetime < 0) 444 autonicetime = old_autonicetime; 445 return (error); 446 case KERN_AUTONICEVAL: 447 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 448 if (autoniceval < PRIO_MIN) 449 autoniceval = PRIO_MIN; 450 if (autoniceval > PRIO_MAX) 451 autoniceval = PRIO_MAX; 452 return (error); 453 case KERN_RTC_OFFSET: 454 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 455 case KERN_ROOT_DEVICE: 456 return (sysctl_rdstring(oldp, oldlenp, newp, 457 root_device->dv_xname)); 458 case KERN_MSGBUFSIZE: 459 /* 460 * deal with cases where the message buffer has 461 * become corrupted. 462 */ 463 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 464 msgbufenabled = 0; 465 return (ENXIO); 466 } 467 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 468 case KERN_FSYNC: 469 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 470 case KERN_SYSVMSG: 471 #ifdef SYSVMSG 472 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 473 #else 474 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 475 #endif 476 case KERN_SYSVSEM: 477 #ifdef SYSVSEM 478 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 479 #else 480 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 481 #endif 482 case KERN_SYSVSHM: 483 #ifdef SYSVSHM 484 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 485 #else 486 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 487 #endif 488 case KERN_DEFCORENAME: 489 if (newp && newlen < 1) 490 return (EINVAL); 491 error = sysctl_string(oldp, oldlenp, newp, newlen, 492 defcorename, sizeof(defcorename)); 493 if (newp && !error) 494 defcorenamelen = newlen; 495 return (error); 496 case KERN_SYNCHRONIZED_IO: 497 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 498 case KERN_IOV_MAX: 499 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 500 case KERN_MBUF: 501 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 502 newp, newlen)); 503 case KERN_MAPPED_FILES: 504 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 505 case KERN_MEMLOCK: 506 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 507 case KERN_MEMLOCK_RANGE: 508 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 509 case KERN_MEMORY_PROTECTION: 510 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 511 case KERN_LOGIN_NAME_MAX: 512 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 513 case KERN_LOGSIGEXIT: 514 return (sysctl_int(oldp, oldlenp, newp, newlen, 515 &kern_logsigexit)); 516 case KERN_FSCALE: 517 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 518 case KERN_CCPU: 519 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 520 case KERN_CP_TIME: 521 #ifndef MULTIPROCESSOR 522 return (sysctl_rdstruct(oldp, oldlenp, newp, 523 curcpu()->ci_schedstate.spc_cp_time, 524 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 525 #else 526 return (sysctl_docptime(oldp, oldlenp, newp)); 527 #endif 528 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 529 case KERN_SYSVIPC_INFO: 530 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 531 #endif 532 case KERN_MSGBUF: 533 return (sysctl_msgbuf(oldp, oldlenp)); 534 case KERN_CONSDEV: 535 if (cn_tab != NULL) 536 consdev = cn_tab->cn_dev; 537 else 538 consdev = NODEV; 539 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 540 sizeof consdev)); 541 #if NPTY > 0 542 case KERN_MAXPTYS: 543 return sysctl_pty(oldp, oldlenp, newp, newlen); 544 #endif 545 #ifndef PIPE_SOCKETPAIR 546 case KERN_PIPE: 547 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 548 newp, newlen)); 549 #endif 550 case KERN_MAXPHYS: 551 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 552 case KERN_SBMAX: 553 { 554 int new_sbmax = sb_max; 555 556 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 557 if (newp && !error) { 558 if (new_sbmax < (16 * 1024)) /* sanity */ 559 return (EINVAL); 560 sb_max = new_sbmax; 561 } 562 return (error); 563 } 564 case KERN_TKSTAT: 565 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 566 newp)); 567 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 568 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 569 default: 570 return (EOPNOTSUPP); 571 } 572 /* NOTREACHED */ 573 } 574 575 /* 576 * hardware related system variables. 577 */ 578 int 579 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 580 void *newp, size_t newlen, struct proc *p) 581 { 582 583 /* All sysctl names at this level, except for a few, are terminal. */ 584 switch (name[0]) { 585 case HW_DISKSTATS: 586 /* Not terminal. */ 587 break; 588 default: 589 if (namelen != 1) 590 return (ENOTDIR); /* overloaded */ 591 } 592 593 switch (name[0]) { 594 case HW_MACHINE: 595 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 596 case HW_MACHINE_ARCH: 597 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 598 case HW_MODEL: 599 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 600 case HW_NCPU: 601 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 602 case HW_BYTEORDER: 603 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 604 case HW_PHYSMEM: 605 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 606 case HW_USERMEM: 607 return (sysctl_rdint(oldp, oldlenp, newp, 608 ctob(physmem - uvmexp.wired))); 609 case HW_PAGESIZE: 610 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 611 case HW_ALIGNBYTES: 612 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 613 case HW_DISKNAMES: 614 return (sysctl_disknames(oldp, oldlenp)); 615 case HW_DISKSTATS: 616 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 617 case HW_CNMAGIC: { 618 char magic[CNS_LEN]; 619 int error; 620 621 if (oldp) 622 cn_get_magic(magic, CNS_LEN); 623 error = sysctl_string(oldp, oldlenp, newp, newlen, 624 magic, sizeof(magic)); 625 if (newp && !error) { 626 error = cn_set_magic(magic); 627 } 628 return (error); 629 } 630 default: 631 return (EOPNOTSUPP); 632 } 633 /* NOTREACHED */ 634 } 635 636 #ifdef DEBUG 637 /* 638 * Debugging related system variables. 639 */ 640 struct ctldebug debug0, debug1, debug2, debug3, debug4; 641 struct ctldebug debug5, debug6, debug7, debug8, debug9; 642 struct ctldebug debug10, debug11, debug12, debug13, debug14; 643 struct ctldebug debug15, debug16, debug17, debug18, debug19; 644 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 645 &debug0, &debug1, &debug2, &debug3, &debug4, 646 &debug5, &debug6, &debug7, &debug8, &debug9, 647 &debug10, &debug11, &debug12, &debug13, &debug14, 648 &debug15, &debug16, &debug17, &debug18, &debug19, 649 }; 650 651 int 652 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 653 void *newp, size_t newlen, struct proc *p) 654 { 655 struct ctldebug *cdp; 656 657 /* all sysctl names at this level are name and field */ 658 if (namelen != 2) 659 return (ENOTDIR); /* overloaded */ 660 cdp = debugvars[name[0]]; 661 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 662 return (EOPNOTSUPP); 663 switch (name[1]) { 664 case CTL_DEBUG_NAME: 665 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 666 case CTL_DEBUG_VALUE: 667 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 668 default: 669 return (EOPNOTSUPP); 670 } 671 /* NOTREACHED */ 672 } 673 #endif /* DEBUG */ 674 675 int 676 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 677 void *newp, size_t newlen, struct proc *p) 678 { 679 struct proc *ptmp = NULL; 680 const struct proclist_desc *pd; 681 int error = 0; 682 struct rlimit alim; 683 struct plimit *newplim; 684 char *tmps = NULL; 685 int i, curlen, len; 686 687 if (namelen < 2) 688 return EINVAL; 689 690 if (name[0] == PROC_CURPROC) { 691 ptmp = p; 692 } else { 693 proclist_lock_read(); 694 for (pd = proclists; pd->pd_list != NULL; pd++) { 695 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 696 ptmp = LIST_NEXT(ptmp, p_list)) { 697 /* Skip embryonic processes. */ 698 if (ptmp->p_stat == SIDL) 699 continue; 700 if (ptmp->p_pid == (pid_t)name[0]) 701 break; 702 } 703 if (ptmp != NULL) 704 break; 705 } 706 proclist_unlock_read(); 707 if (ptmp == NULL) 708 return(ESRCH); 709 if (p->p_ucred->cr_uid != 0) { 710 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 711 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 712 return EPERM; 713 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 714 return EPERM; /* sgid proc */ 715 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 716 if (p->p_ucred->cr_groups[i] == 717 ptmp->p_cred->p_rgid) 718 break; 719 } 720 if (i == p->p_ucred->cr_ngroups) 721 return EPERM; 722 } 723 } 724 if (name[1] == PROC_PID_CORENAME) { 725 if (namelen != 2) 726 return EINVAL; 727 /* 728 * Can't use sysctl_string() here because we may malloc a new 729 * area during the process, so we have to do it by hand. 730 */ 731 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 732 if (oldlenp && *oldlenp < curlen) { 733 if (!oldp) 734 *oldlenp = curlen; 735 return (ENOMEM); 736 } 737 if (newp) { 738 if (securelevel > 2) 739 return EPERM; 740 if (newlen > MAXPATHLEN) 741 return ENAMETOOLONG; 742 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 743 if (tmps == NULL) 744 return ENOMEM; 745 error = copyin(newp, tmps, newlen + 1); 746 tmps[newlen] = '\0'; 747 if (error) 748 goto cleanup; 749 /* Enforce to be either 'core' for end with '.core' */ 750 if (newlen < 4) { /* c.o.r.e */ 751 error = EINVAL; 752 goto cleanup; 753 } 754 len = newlen - 4; 755 if (len > 0) { 756 if (tmps[len - 1] != '.' && 757 tmps[len - 1] != '/') { 758 error = EINVAL; 759 goto cleanup; 760 } 761 } 762 if (strcmp(&tmps[len], "core") != 0) { 763 error = EINVAL; 764 goto cleanup; 765 } 766 } 767 if (oldp && oldlenp) { 768 *oldlenp = curlen; 769 error = copyout(ptmp->p_limit->pl_corename, oldp, 770 curlen); 771 } 772 if (newp && error == 0) { 773 /* if the 2 strings are identical, don't limcopy() */ 774 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 775 error = 0; 776 goto cleanup; 777 } 778 if (ptmp->p_limit->p_refcnt > 1 && 779 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 780 newplim = limcopy(ptmp->p_limit); 781 limfree(ptmp->p_limit); 782 ptmp->p_limit = newplim; 783 } 784 if (ptmp->p_limit->pl_corename != defcorename) { 785 free(ptmp->p_limit->pl_corename, M_TEMP); 786 } 787 ptmp->p_limit->pl_corename = tmps; 788 return (0); 789 } 790 cleanup: 791 if (tmps) 792 free(tmps, M_TEMP); 793 return (error); 794 } 795 if (name[1] == PROC_PID_LIMIT) { 796 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 797 return EINVAL; 798 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 799 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 800 error = sysctl_quad(oldp, oldlenp, newp, newlen, 801 &alim.rlim_max); 802 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 803 error = sysctl_quad(oldp, oldlenp, newp, newlen, 804 &alim.rlim_cur); 805 else 806 error = EINVAL; 807 808 if (error) 809 return error; 810 811 if (newp) 812 error = dosetrlimit(ptmp, p->p_cred, 813 name[2] - 1, &alim); 814 return error; 815 } 816 return (EINVAL); 817 } 818 819 /* 820 * Convenience macros. 821 */ 822 823 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 824 if (oldlenp) { \ 825 if (!oldp) \ 826 *oldlenp = len; \ 827 else { \ 828 if (*oldlenp < len) \ 829 return(ENOMEM); \ 830 *oldlenp = len; \ 831 error = copyout((caddr_t)valp, oldp, len); \ 832 } \ 833 } 834 835 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 836 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 837 838 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 839 if (newp && newlen != len) \ 840 return (EINVAL); 841 842 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 843 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 844 845 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 846 if (error == 0 && newp) \ 847 error = copyin(newp, valp, len); 848 849 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 850 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 851 852 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 853 if (oldlenp) { \ 854 len = strlen(str) + 1; \ 855 if (!oldp) \ 856 *oldlenp = len; \ 857 else { \ 858 if (*oldlenp < len) { \ 859 err2 = ENOMEM; \ 860 len = *oldlenp; \ 861 } else \ 862 *oldlenp = len; \ 863 error = copyout(str, oldp, len);\ 864 if (error == 0) \ 865 error = err2; \ 866 } \ 867 } 868 869 /* 870 * Validate parameters and get old / set new parameters 871 * for an integer-valued sysctl function. 872 */ 873 int 874 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 875 { 876 int error = 0; 877 878 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 879 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 880 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 881 882 return (error); 883 } 884 885 886 /* 887 * As above, but read-only. 888 */ 889 int 890 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 891 { 892 int error = 0; 893 894 if (newp) 895 return (EPERM); 896 897 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 898 899 return (error); 900 } 901 902 /* 903 * Validate parameters and get old / set new parameters 904 * for an quad-valued sysctl function. 905 */ 906 int 907 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 908 quad_t *valp) 909 { 910 int error = 0; 911 912 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 913 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 914 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 915 916 return (error); 917 } 918 919 /* 920 * As above, but read-only. 921 */ 922 int 923 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 924 { 925 int error = 0; 926 927 if (newp) 928 return (EPERM); 929 930 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 931 932 return (error); 933 } 934 935 /* 936 * Validate parameters and get old / set new parameters 937 * for a string-valued sysctl function. 938 */ 939 int 940 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 941 int maxlen) 942 { 943 int len, error = 0, err2 = 0; 944 945 if (newp && newlen >= maxlen) 946 return (EINVAL); 947 948 SYSCTL_STRING_CORE(oldp, oldlenp, str); 949 950 if (error == 0 && newp) { 951 error = copyin(newp, str, newlen); 952 str[newlen] = 0; 953 } 954 return (error); 955 } 956 957 /* 958 * As above, but read-only. 959 */ 960 int 961 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 962 { 963 int len, error = 0, err2 = 0; 964 965 if (newp) 966 return (EPERM); 967 968 SYSCTL_STRING_CORE(oldp, oldlenp, str); 969 970 return (error); 971 } 972 973 /* 974 * Validate parameters and get old / set new parameters 975 * for a structure oriented sysctl function. 976 */ 977 int 978 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 979 int len) 980 { 981 int error = 0; 982 983 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 984 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 985 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 986 987 return (error); 988 } 989 990 /* 991 * Validate parameters and get old parameters 992 * for a structure oriented sysctl function. 993 */ 994 int 995 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 996 int len) 997 { 998 int error = 0; 999 1000 if (newp) 1001 return (EPERM); 1002 1003 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1004 1005 return (error); 1006 } 1007 1008 /* 1009 * As above, but can return a truncated result. 1010 */ 1011 int 1012 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1013 int len) 1014 { 1015 int error = 0; 1016 1017 if (newp) 1018 return (EPERM); 1019 1020 len = min(*oldlenp, len); 1021 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1022 1023 return (error); 1024 } 1025 1026 /* 1027 * Get file structures. 1028 */ 1029 static int 1030 sysctl_file(void *vwhere, size_t *sizep) 1031 { 1032 int buflen, error; 1033 struct file *fp; 1034 char *start, *where; 1035 1036 start = where = vwhere; 1037 buflen = *sizep; 1038 if (where == NULL) { 1039 /* 1040 * overestimate by 10 files 1041 */ 1042 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1043 return (0); 1044 } 1045 1046 /* 1047 * first copyout filehead 1048 */ 1049 if (buflen < sizeof(filehead)) { 1050 *sizep = 0; 1051 return (0); 1052 } 1053 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1054 if (error) 1055 return (error); 1056 buflen -= sizeof(filehead); 1057 where += sizeof(filehead); 1058 1059 /* 1060 * followed by an array of file structures 1061 */ 1062 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1063 if (buflen < sizeof(struct file)) { 1064 *sizep = where - start; 1065 return (ENOMEM); 1066 } 1067 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1068 if (error) 1069 return (error); 1070 buflen -= sizeof(struct file); 1071 where += sizeof(struct file); 1072 } 1073 *sizep = where - start; 1074 return (0); 1075 } 1076 1077 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1078 #define FILL_PERM(src, dst) do { \ 1079 (dst)._key = (src)._key; \ 1080 (dst).uid = (src).uid; \ 1081 (dst).gid = (src).gid; \ 1082 (dst).cuid = (src).cuid; \ 1083 (dst).cgid = (src).cgid; \ 1084 (dst).mode = (src).mode; \ 1085 (dst)._seq = (src)._seq; \ 1086 } while (0); 1087 #define FILL_MSG(src, dst) do { \ 1088 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1089 (dst).msg_qnum = (src).msg_qnum; \ 1090 (dst).msg_qbytes = (src).msg_qbytes; \ 1091 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1092 (dst).msg_lspid = (src).msg_lspid; \ 1093 (dst).msg_lrpid = (src).msg_lrpid; \ 1094 (dst).msg_stime = (src).msg_stime; \ 1095 (dst).msg_rtime = (src).msg_rtime; \ 1096 (dst).msg_ctime = (src).msg_ctime; \ 1097 } while (0) 1098 #define FILL_SEM(src, dst) do { \ 1099 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1100 (dst).sem_nsems = (src).sem_nsems; \ 1101 (dst).sem_otime = (src).sem_otime; \ 1102 (dst).sem_ctime = (src).sem_ctime; \ 1103 } while (0) 1104 #define FILL_SHM(src, dst) do { \ 1105 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1106 (dst).shm_segsz = (src).shm_segsz; \ 1107 (dst).shm_lpid = (src).shm_lpid; \ 1108 (dst).shm_cpid = (src).shm_cpid; \ 1109 (dst).shm_atime = (src).shm_atime; \ 1110 (dst).shm_dtime = (src).shm_dtime; \ 1111 (dst).shm_ctime = (src).shm_ctime; \ 1112 (dst).shm_nattch = (src).shm_nattch; \ 1113 } while (0) 1114 1115 static int 1116 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1117 { 1118 #ifdef SYSVMSG 1119 struct msg_sysctl_info *msgsi; 1120 #endif 1121 #ifdef SYSVSEM 1122 struct sem_sysctl_info *semsi; 1123 #endif 1124 #ifdef SYSVSHM 1125 struct shm_sysctl_info *shmsi; 1126 #endif 1127 size_t infosize, dssize, tsize, buflen; 1128 void *buf = NULL, *buf2; 1129 char *start; 1130 int32_t nds; 1131 int i, error, ret; 1132 1133 if (namelen != 1) 1134 return (EINVAL); 1135 1136 start = where; 1137 buflen = *sizep; 1138 1139 switch (*name) { 1140 case KERN_SYSVIPC_MSG_INFO: 1141 #ifdef SYSVMSG 1142 infosize = sizeof(msgsi->msginfo); 1143 nds = msginfo.msgmni; 1144 dssize = sizeof(msgsi->msgids[0]); 1145 break; 1146 #else 1147 return (EINVAL); 1148 #endif 1149 case KERN_SYSVIPC_SEM_INFO: 1150 #ifdef SYSVSEM 1151 infosize = sizeof(semsi->seminfo); 1152 nds = seminfo.semmni; 1153 dssize = sizeof(semsi->semids[0]); 1154 break; 1155 #else 1156 return (EINVAL); 1157 #endif 1158 case KERN_SYSVIPC_SHM_INFO: 1159 #ifdef SYSVSHM 1160 infosize = sizeof(shmsi->shminfo); 1161 nds = shminfo.shmmni; 1162 dssize = sizeof(shmsi->shmids[0]); 1163 break; 1164 #else 1165 return (EINVAL); 1166 #endif 1167 default: 1168 return (EINVAL); 1169 } 1170 /* 1171 * Round infosize to 64 bit boundary if requesting more than just 1172 * the info structure or getting the total data size. 1173 */ 1174 if (where == NULL || *sizep > infosize) 1175 infosize = ((infosize + 7) / 8) * 8; 1176 tsize = infosize + nds * dssize; 1177 1178 /* Return just the total size required. */ 1179 if (where == NULL) { 1180 *sizep = tsize; 1181 return (0); 1182 } 1183 1184 /* Not enough room for even the info struct. */ 1185 if (buflen < infosize) { 1186 *sizep = 0; 1187 return (ENOMEM); 1188 } 1189 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1190 memset(buf, 0, min(tsize, buflen)); 1191 1192 switch (*name) { 1193 #ifdef SYSVMSG 1194 case KERN_SYSVIPC_MSG_INFO: 1195 msgsi = (struct msg_sysctl_info *)buf; 1196 buf2 = &msgsi->msgids[0]; 1197 msgsi->msginfo = msginfo; 1198 break; 1199 #endif 1200 #ifdef SYSVSEM 1201 case KERN_SYSVIPC_SEM_INFO: 1202 semsi = (struct sem_sysctl_info *)buf; 1203 buf2 = &semsi->semids[0]; 1204 semsi->seminfo = seminfo; 1205 break; 1206 #endif 1207 #ifdef SYSVSHM 1208 case KERN_SYSVIPC_SHM_INFO: 1209 shmsi = (struct shm_sysctl_info *)buf; 1210 buf2 = &shmsi->shmids[0]; 1211 shmsi->shminfo = shminfo; 1212 break; 1213 #endif 1214 } 1215 buflen -= infosize; 1216 1217 ret = 0; 1218 if (buflen > 0) { 1219 /* Fill in the IPC data structures. */ 1220 for (i = 0; i < nds; i++) { 1221 if (buflen < dssize) { 1222 ret = ENOMEM; 1223 break; 1224 } 1225 switch (*name) { 1226 #ifdef SYSVMSG 1227 case KERN_SYSVIPC_MSG_INFO: 1228 FILL_MSG(msqids[i], msgsi->msgids[i]); 1229 break; 1230 #endif 1231 #ifdef SYSVSEM 1232 case KERN_SYSVIPC_SEM_INFO: 1233 FILL_SEM(sema[i], semsi->semids[i]); 1234 break; 1235 #endif 1236 #ifdef SYSVSHM 1237 case KERN_SYSVIPC_SHM_INFO: 1238 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1239 break; 1240 #endif 1241 } 1242 buflen -= dssize; 1243 } 1244 } 1245 *sizep -= buflen; 1246 error = copyout(buf, start, *sizep); 1247 /* If copyout succeeded, use return code set earlier. */ 1248 if (error == 0) 1249 error = ret; 1250 if (buf) 1251 free(buf, M_TEMP); 1252 return (error); 1253 } 1254 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1255 1256 static int 1257 sysctl_msgbuf(void *vwhere, size_t *sizep) 1258 { 1259 char *where = vwhere; 1260 size_t len, maxlen = *sizep; 1261 long beg, end; 1262 int error; 1263 1264 /* 1265 * deal with cases where the message buffer has 1266 * become corrupted. 1267 */ 1268 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1269 msgbufenabled = 0; 1270 return (ENXIO); 1271 } 1272 1273 if (where == NULL) { 1274 /* always return full buffer size */ 1275 *sizep = msgbufp->msg_bufs; 1276 return (0); 1277 } 1278 1279 error = 0; 1280 maxlen = min(msgbufp->msg_bufs, maxlen); 1281 1282 /* 1283 * First, copy from the write pointer to the end of 1284 * message buffer. 1285 */ 1286 beg = msgbufp->msg_bufx; 1287 end = msgbufp->msg_bufs; 1288 while (maxlen > 0) { 1289 len = min(end - beg, maxlen); 1290 if (len == 0) 1291 break; 1292 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1293 if (error) 1294 break; 1295 where += len; 1296 maxlen -= len; 1297 1298 /* 1299 * ... then, copy from the beginning of message buffer to 1300 * the write pointer. 1301 */ 1302 beg = 0; 1303 end = msgbufp->msg_bufx; 1304 } 1305 return (error); 1306 } 1307 1308 /* 1309 * try over estimating by 5 procs 1310 */ 1311 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1312 1313 static int 1314 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1315 { 1316 struct eproc eproc; 1317 struct kinfo_proc2 kproc2; 1318 struct kinfo_proc *dp; 1319 struct proc *p; 1320 const struct proclist_desc *pd; 1321 char *where, *dp2; 1322 int type, op, arg, elem_size, elem_count; 1323 int buflen, needed, error; 1324 1325 dp = vwhere; 1326 dp2 = where = vwhere; 1327 buflen = where != NULL ? *sizep : 0; 1328 error = needed = 0; 1329 type = name[0]; 1330 1331 if (type == KERN_PROC) { 1332 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1333 return (EINVAL); 1334 op = name[1]; 1335 if (op != KERN_PROC_ALL) 1336 arg = name[2]; 1337 } else { 1338 if (namelen != 5) 1339 return (EINVAL); 1340 op = name[1]; 1341 arg = name[2]; 1342 elem_size = name[3]; 1343 elem_count = name[4]; 1344 } 1345 1346 proclist_lock_read(); 1347 1348 pd = proclists; 1349 again: 1350 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1351 /* 1352 * Skip embryonic processes. 1353 */ 1354 if (p->p_stat == SIDL) 1355 continue; 1356 /* 1357 * TODO - make more efficient (see notes below). 1358 * do by session. 1359 */ 1360 switch (op) { 1361 1362 case KERN_PROC_PID: 1363 /* could do this with just a lookup */ 1364 if (p->p_pid != (pid_t)arg) 1365 continue; 1366 break; 1367 1368 case KERN_PROC_PGRP: 1369 /* could do this by traversing pgrp */ 1370 if (p->p_pgrp->pg_id != (pid_t)arg) 1371 continue; 1372 break; 1373 1374 case KERN_PROC_SESSION: 1375 if (p->p_session->s_sid != (pid_t)arg) 1376 continue; 1377 break; 1378 1379 case KERN_PROC_TTY: 1380 if (arg == KERN_PROC_TTY_REVOKE) { 1381 if ((p->p_flag & P_CONTROLT) == 0 || 1382 p->p_session->s_ttyp == NULL || 1383 p->p_session->s_ttyvp != NULL) 1384 continue; 1385 } else if ((p->p_flag & P_CONTROLT) == 0 || 1386 p->p_session->s_ttyp == NULL) { 1387 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1388 continue; 1389 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1390 continue; 1391 break; 1392 1393 case KERN_PROC_UID: 1394 if (p->p_ucred->cr_uid != (uid_t)arg) 1395 continue; 1396 break; 1397 1398 case KERN_PROC_RUID: 1399 if (p->p_cred->p_ruid != (uid_t)arg) 1400 continue; 1401 break; 1402 1403 case KERN_PROC_GID: 1404 if (p->p_ucred->cr_gid != (uid_t)arg) 1405 continue; 1406 break; 1407 1408 case KERN_PROC_RGID: 1409 if (p->p_cred->p_rgid != (uid_t)arg) 1410 continue; 1411 break; 1412 1413 case KERN_PROC_ALL: 1414 /* allow everything */ 1415 break; 1416 1417 default: 1418 error = EINVAL; 1419 goto cleanup; 1420 } 1421 if (type == KERN_PROC) { 1422 if (buflen >= sizeof(struct kinfo_proc)) { 1423 fill_eproc(p, &eproc); 1424 error = copyout((caddr_t)p, &dp->kp_proc, 1425 sizeof(struct proc)); 1426 if (error) 1427 goto cleanup; 1428 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1429 sizeof(eproc)); 1430 if (error) 1431 goto cleanup; 1432 dp++; 1433 buflen -= sizeof(struct kinfo_proc); 1434 } 1435 needed += sizeof(struct kinfo_proc); 1436 } else { /* KERN_PROC2 */ 1437 if (buflen >= elem_size && elem_count > 0) { 1438 fill_kproc2(p, &kproc2); 1439 /* 1440 * Copy out elem_size, but not larger than 1441 * the size of a struct kinfo_proc2. 1442 */ 1443 error = copyout(&kproc2, dp2, 1444 min(sizeof(kproc2), elem_size)); 1445 if (error) 1446 goto cleanup; 1447 dp2 += elem_size; 1448 buflen -= elem_size; 1449 elem_count--; 1450 } 1451 needed += elem_size; 1452 } 1453 } 1454 pd++; 1455 if (pd->pd_list != NULL) 1456 goto again; 1457 proclist_unlock_read(); 1458 1459 if (where != NULL) { 1460 if (type == KERN_PROC) 1461 *sizep = (caddr_t)dp - where; 1462 else 1463 *sizep = dp2 - where; 1464 if (needed > *sizep) 1465 return (ENOMEM); 1466 } else { 1467 needed += KERN_PROCSLOP; 1468 *sizep = needed; 1469 } 1470 return (0); 1471 cleanup: 1472 proclist_unlock_read(); 1473 return (error); 1474 } 1475 1476 /* 1477 * Fill in an eproc structure for the specified process. 1478 */ 1479 void 1480 fill_eproc(struct proc *p, struct eproc *ep) 1481 { 1482 struct tty *tp; 1483 struct lwp *l; 1484 1485 ep->e_paddr = p; 1486 ep->e_sess = p->p_session; 1487 ep->e_pcred = *p->p_cred; 1488 ep->e_ucred = *p->p_ucred; 1489 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1490 ep->e_vm.vm_rssize = 0; 1491 ep->e_vm.vm_tsize = 0; 1492 ep->e_vm.vm_dsize = 0; 1493 ep->e_vm.vm_ssize = 0; 1494 /* ep->e_vm.vm_pmap = XXX; */ 1495 } else { 1496 struct vmspace *vm = p->p_vmspace; 1497 1498 ep->e_vm.vm_rssize = vm_resident_count(vm); 1499 ep->e_vm.vm_tsize = vm->vm_tsize; 1500 ep->e_vm.vm_dsize = vm->vm_dsize; 1501 ep->e_vm.vm_ssize = vm->vm_ssize; 1502 1503 /* Pick a "representative" LWP */ 1504 l = proc_representative_lwp(p); 1505 1506 if (l->l_wmesg) 1507 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1508 } 1509 if (p->p_pptr) 1510 ep->e_ppid = p->p_pptr->p_pid; 1511 else 1512 ep->e_ppid = 0; 1513 ep->e_pgid = p->p_pgrp->pg_id; 1514 ep->e_sid = ep->e_sess->s_sid; 1515 ep->e_jobc = p->p_pgrp->pg_jobc; 1516 if ((p->p_flag & P_CONTROLT) && 1517 (tp = ep->e_sess->s_ttyp)) { 1518 ep->e_tdev = tp->t_dev; 1519 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1520 ep->e_tsess = tp->t_session; 1521 } else 1522 ep->e_tdev = NODEV; 1523 1524 ep->e_xsize = ep->e_xrssize = 0; 1525 ep->e_xccount = ep->e_xswrss = 0; 1526 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1527 if (SESS_LEADER(p)) 1528 ep->e_flag |= EPROC_SLEADER; 1529 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1530 } 1531 1532 /* 1533 * Fill in an eproc structure for the specified process. 1534 */ 1535 static void 1536 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1537 { 1538 struct tty *tp; 1539 struct lwp *l; 1540 memset(ki, 0, sizeof(*ki)); 1541 1542 /* XXX NJWLWP 1543 * These are likely not what the caller was looking for. 1544 * The perils of playing with the kernel data structures... 1545 */ 1546 ki->p_paddr = PTRTOINT64(p); 1547 ki->p_fd = PTRTOINT64(p->p_fd); 1548 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1549 ki->p_stats = PTRTOINT64(p->p_stats); 1550 ki->p_limit = PTRTOINT64(p->p_limit); 1551 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1552 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1553 ki->p_sess = PTRTOINT64(p->p_session); 1554 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1555 ki->p_ru = PTRTOINT64(p->p_ru); 1556 1557 ki->p_eflag = 0; 1558 ki->p_exitsig = p->p_exitsig; 1559 ki->p_flag = p->p_flag; 1560 1561 ki->p_pid = p->p_pid; 1562 if (p->p_pptr) 1563 ki->p_ppid = p->p_pptr->p_pid; 1564 else 1565 ki->p_ppid = 0; 1566 ki->p_sid = p->p_session->s_sid; 1567 ki->p__pgid = p->p_pgrp->pg_id; 1568 1569 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1570 1571 ki->p_uid = p->p_ucred->cr_uid; 1572 ki->p_ruid = p->p_cred->p_ruid; 1573 ki->p_gid = p->p_ucred->cr_gid; 1574 ki->p_rgid = p->p_cred->p_rgid; 1575 1576 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1577 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1578 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1579 1580 ki->p_jobc = p->p_pgrp->pg_jobc; 1581 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1582 ki->p_tdev = tp->t_dev; 1583 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1584 ki->p_tsess = PTRTOINT64(tp->t_session); 1585 } else { 1586 ki->p_tdev = NODEV; 1587 } 1588 1589 ki->p_estcpu = p->p_estcpu; 1590 ki->p_rtime_sec = p->p_rtime.tv_sec; 1591 ki->p_rtime_usec = p->p_rtime.tv_usec; 1592 ki->p_cpticks = p->p_cpticks; 1593 ki->p_pctcpu = p->p_pctcpu; 1594 1595 ki->p_uticks = p->p_uticks; 1596 ki->p_sticks = p->p_sticks; 1597 ki->p_iticks = p->p_iticks; 1598 1599 ki->p_tracep = PTRTOINT64(p->p_tracep); 1600 ki->p_traceflag = p->p_traceflag; 1601 1602 1603 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1604 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1605 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1606 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1607 1608 ki->p_stat = p->p_stat; 1609 ki->p_nice = p->p_nice; 1610 1611 ki->p_xstat = p->p_xstat; 1612 ki->p_acflag = p->p_acflag; 1613 1614 strncpy(ki->p_comm, p->p_comm, 1615 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1616 1617 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1618 1619 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1620 ki->p_vm_rssize = 0; 1621 ki->p_vm_tsize = 0; 1622 ki->p_vm_dsize = 0; 1623 ki->p_vm_ssize = 0; 1624 } else { 1625 struct vmspace *vm = p->p_vmspace; 1626 1627 ki->p_vm_rssize = vm_resident_count(vm); 1628 ki->p_vm_tsize = vm->vm_tsize; 1629 ki->p_vm_dsize = vm->vm_dsize; 1630 ki->p_vm_ssize = vm->vm_ssize; 1631 1632 /* Pick a "representative" LWP */ 1633 l = proc_representative_lwp(p); 1634 ki->p_forw = PTRTOINT64(l->l_forw); 1635 ki->p_back = PTRTOINT64(l->l_back); 1636 ki->p_addr = PTRTOINT64(l->l_addr); 1637 ki->p_stat = l->l_stat; 1638 ki->p_flag |= l->l_flag; 1639 ki->p_swtime = l->l_swtime; 1640 ki->p_slptime = l->l_slptime; 1641 if (l->l_stat == LSONPROC) { 1642 KDASSERT(l->l_cpu != NULL); 1643 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1644 } else 1645 ki->p_schedflags = 0; 1646 ki->p_holdcnt = l->l_holdcnt; 1647 ki->p_priority = l->l_priority; 1648 ki->p_usrpri = l->l_usrpri; 1649 if (l->l_wmesg) 1650 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1651 ki->p_wchan = PTRTOINT64(l->l_wchan); 1652 1653 } 1654 1655 if (p->p_session->s_ttyvp) 1656 ki->p_eflag |= EPROC_CTTY; 1657 if (SESS_LEADER(p)) 1658 ki->p_eflag |= EPROC_SLEADER; 1659 1660 /* XXX Is this double check necessary? */ 1661 if (P_ZOMBIE(p)) { 1662 ki->p_uvalid = 0; 1663 } else { 1664 ki->p_uvalid = 1; 1665 1666 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1667 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1668 1669 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1670 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1671 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1672 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1673 1674 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1675 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1676 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1677 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1678 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1679 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1680 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1681 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1682 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1683 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1684 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1685 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1686 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1687 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1688 1689 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1690 p->p_stats->p_cru.ru_stime.tv_sec; 1691 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1692 p->p_stats->p_cru.ru_stime.tv_usec; 1693 } 1694 #ifdef MULTIPROCESSOR 1695 if (p->p_cpu != NULL) 1696 ki->p_cpuid = p->p_cpu->ci_cpuid; 1697 else 1698 #endif 1699 ki->p_cpuid = KI_NOCPU; 1700 1701 } 1702 1703 1704 1705 1706 int 1707 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1708 struct proc *up) 1709 { 1710 struct ps_strings pss; 1711 struct proc *p; 1712 size_t len, upper_bound, xlen; 1713 struct uio auio; 1714 struct iovec aiov; 1715 vaddr_t argv; 1716 pid_t pid; 1717 int nargv, type, error, i; 1718 char *arg; 1719 char *tmp; 1720 1721 if (namelen != 2) 1722 return (EINVAL); 1723 pid = name[0]; 1724 type = name[1]; 1725 1726 switch (type) { 1727 case KERN_PROC_ARGV: 1728 case KERN_PROC_NARGV: 1729 case KERN_PROC_ENV: 1730 case KERN_PROC_NENV: 1731 /* ok */ 1732 break; 1733 default: 1734 return (EINVAL); 1735 } 1736 1737 /* check pid */ 1738 if ((p = pfind(pid)) == NULL) 1739 return (EINVAL); 1740 1741 /* only root or same user change look at the environment */ 1742 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1743 if (up->p_ucred->cr_uid != 0) { 1744 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1745 up->p_cred->p_ruid != p->p_cred->p_svuid) 1746 return (EPERM); 1747 } 1748 } 1749 1750 if (sizep != NULL && where == NULL) { 1751 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1752 *sizep = sizeof (int); 1753 else 1754 *sizep = ARG_MAX; /* XXX XXX XXX */ 1755 return (0); 1756 } 1757 if (where == NULL || sizep == NULL) 1758 return (EINVAL); 1759 1760 /* 1761 * Zombies don't have a stack, so we can't read their psstrings. 1762 * System processes also don't have a user stack. 1763 */ 1764 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1765 return (EINVAL); 1766 1767 /* 1768 * Lock the process down in memory. 1769 */ 1770 /* XXXCDC: how should locking work here? */ 1771 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1772 return (EFAULT); 1773 1774 p->p_vmspace->vm_refcnt++; /* XXX */ 1775 1776 /* 1777 * Allocate a temporary buffer to hold the arguments. 1778 */ 1779 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1780 1781 /* 1782 * Read in the ps_strings structure. 1783 */ 1784 aiov.iov_base = &pss; 1785 aiov.iov_len = sizeof(pss); 1786 auio.uio_iov = &aiov; 1787 auio.uio_iovcnt = 1; 1788 auio.uio_offset = (vaddr_t)p->p_psstr; 1789 auio.uio_resid = sizeof(pss); 1790 auio.uio_segflg = UIO_SYSSPACE; 1791 auio.uio_rw = UIO_READ; 1792 auio.uio_procp = NULL; 1793 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1794 if (error) 1795 goto done; 1796 1797 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1798 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1799 else 1800 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1801 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1802 error = copyout(&nargv, where, sizeof(nargv)); 1803 *sizep = sizeof(nargv); 1804 goto done; 1805 } 1806 /* 1807 * Now read the address of the argument vector. 1808 */ 1809 switch (type) { 1810 case KERN_PROC_ARGV: 1811 /* XXX compat32 stuff here */ 1812 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1813 break; 1814 case KERN_PROC_ENV: 1815 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1816 break; 1817 default: 1818 return (EINVAL); 1819 } 1820 auio.uio_offset = (off_t)(long)tmp; 1821 aiov.iov_base = &argv; 1822 aiov.iov_len = sizeof(argv); 1823 auio.uio_iov = &aiov; 1824 auio.uio_iovcnt = 1; 1825 auio.uio_resid = sizeof(argv); 1826 auio.uio_segflg = UIO_SYSSPACE; 1827 auio.uio_rw = UIO_READ; 1828 auio.uio_procp = NULL; 1829 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1830 if (error) 1831 goto done; 1832 1833 /* 1834 * Now copy in the actual argument vector, one page at a time, 1835 * since we don't know how long the vector is (though, we do 1836 * know how many NUL-terminated strings are in the vector). 1837 */ 1838 len = 0; 1839 upper_bound = *sizep; 1840 for (; nargv != 0 && len < upper_bound; len += xlen) { 1841 aiov.iov_base = arg; 1842 aiov.iov_len = PAGE_SIZE; 1843 auio.uio_iov = &aiov; 1844 auio.uio_iovcnt = 1; 1845 auio.uio_offset = argv + len; 1846 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1847 auio.uio_resid = xlen; 1848 auio.uio_segflg = UIO_SYSSPACE; 1849 auio.uio_rw = UIO_READ; 1850 auio.uio_procp = NULL; 1851 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1852 if (error) 1853 goto done; 1854 1855 for (i = 0; i < xlen && nargv != 0; i++) { 1856 if (arg[i] == '\0') 1857 nargv--; /* one full string */ 1858 } 1859 1860 /* make sure we don't copyout past the end of the user's buffer */ 1861 if (len + i > upper_bound) 1862 i = upper_bound - len; 1863 1864 error = copyout(arg, (char *)where + len, i); 1865 if (error) 1866 break; 1867 1868 if (nargv == 0) { 1869 len += i; 1870 break; 1871 } 1872 } 1873 *sizep = len; 1874 1875 done: 1876 uvmspace_free(p->p_vmspace); 1877 1878 free(arg, M_TEMP); 1879 return (error); 1880 } 1881 1882 #if NPTY > 0 1883 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1884 1885 /* 1886 * Validate parameters and get old / set new parameters 1887 * for pty sysctl function. 1888 */ 1889 static int 1890 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 1891 { 1892 int error = 0; 1893 int oldmax = 0, newmax = 0; 1894 1895 /* get current value of maxptys */ 1896 oldmax = pty_maxptys(0, 0); 1897 1898 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1899 1900 if (!error && newp) { 1901 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1902 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1903 1904 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1905 return (EINVAL); 1906 1907 } 1908 1909 return (error); 1910 } 1911 #endif /* NPTY > 0 */ 1912 1913 static int 1914 sysctl_dotkstat(name, namelen, where, sizep, newp) 1915 int *name; 1916 u_int namelen; 1917 void *where; 1918 size_t *sizep; 1919 void *newp; 1920 { 1921 /* all sysctl names at this level are terminal */ 1922 if (namelen != 1) 1923 return (ENOTDIR); /* overloaded */ 1924 1925 switch (name[0]) { 1926 case KERN_TKSTAT_NIN: 1927 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 1928 case KERN_TKSTAT_NOUT: 1929 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 1930 case KERN_TKSTAT_CANCC: 1931 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 1932 case KERN_TKSTAT_RAWCC: 1933 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 1934 default: 1935 return (EOPNOTSUPP); 1936 } 1937 } 1938
Indexes created Tue Sep 30 06:09:59 GMT 2025