kern_sysctl.c revision 1.141
1 /* $NetBSD: kern_sysctl.c,v 1.141 2003/08/14 05:14:52 itojun 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95 35 */ 36 37 /* 38 * sysctl system call. 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: kern_sysctl.c,v 1.141 2003/08/14 05:14:52 itojun Exp $"); 43 44 #include "opt_ddb.h" 45 #include "opt_insecure.h" 46 #include "opt_defcorename.h" 47 #include "opt_multiprocessor.h" 48 #include "opt_pipe.h" 49 #include "opt_sysv.h" 50 #include "pty.h" 51 #include "rnd.h" 52 53 #include <sys/param.h> 54 #include <sys/systm.h> 55 #include <sys/kernel.h> 56 #include <sys/buf.h> 57 #include <sys/device.h> 58 #include <sys/disklabel.h> 59 #include <sys/dkstat.h> 60 #include <sys/exec.h> 61 #include <sys/file.h> 62 #include <sys/ioctl.h> 63 #include <sys/malloc.h> 64 #include <sys/mount.h> 65 #include <sys/msgbuf.h> 66 #include <sys/pool.h> 67 #include <sys/proc.h> 68 #include <sys/resource.h> 69 #include <sys/resourcevar.h> 70 #include <sys/sa.h> 71 #include <sys/syscallargs.h> 72 #include <sys/tty.h> 73 #include <sys/unistd.h> 74 #include <sys/vnode.h> 75 #include <sys/socketvar.h> 76 #define __SYSCTL_PRIVATE 77 #include <sys/sysctl.h> 78 #include <sys/lock.h> 79 #include <sys/namei.h> 80 81 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 82 #include <sys/ipc.h> 83 #endif 84 #ifdef SYSVMSG 85 #include <sys/msg.h> 86 #endif 87 #ifdef SYSVSEM 88 #include <sys/sem.h> 89 #endif 90 #ifdef SYSVSHM 91 #include <sys/shm.h> 92 #endif 93 94 #include <dev/cons.h> 95 96 #if defined(DDB) 97 #include <ddb/ddbvar.h> 98 #endif 99 100 #ifndef PIPE_SOCKETPAIR 101 #include <sys/pipe.h> 102 #endif 103 104 #if NRND > 0 105 #include <sys/rnd.h> 106 #endif 107 108 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 109 110 static int sysctl_file(void *, size_t *); 111 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 112 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 113 #endif 114 static int sysctl_msgbuf(void *, size_t *); 115 static int sysctl_doeproc(int *, u_int, void *, size_t *); 116 static int sysctl_dolwp(int *, u_int, void *, size_t *); 117 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 118 #ifdef MULTIPROCESSOR 119 static int sysctl_docptime(void *, size_t *, void *); 120 static int sysctl_ncpus(void); 121 #endif 122 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 123 static void fill_lwp(struct lwp *, struct kinfo_lwp *); 124 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 125 #if NPTY > 0 126 static int sysctl_pty(void *, size_t *, void *, size_t); 127 #endif 128 129 /* 130 * The `sysctl_memlock' is intended to keep too many processes from 131 * locking down memory by doing sysctls at once. Whether or not this 132 * is really a good idea to worry about it probably a subject of some 133 * debate. 134 */ 135 struct lock sysctl_memlock; 136 137 void 138 sysctl_init(void) 139 { 140 141 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 142 } 143 144 int 145 sys___sysctl(struct lwp *l, void *v, register_t *retval) 146 { 147 struct sys___sysctl_args /* { 148 syscallarg(int *) name; 149 syscallarg(u_int) namelen; 150 syscallarg(void *) old; 151 syscallarg(size_t *) oldlenp; 152 syscallarg(void *) new; 153 syscallarg(size_t) newlen; 154 } */ *uap = v; 155 struct proc *p = l->l_proc; 156 int error; 157 size_t savelen = 0, oldlen = 0; 158 sysctlfn *fn; 159 int name[CTL_MAXNAME]; 160 161 /* 162 * all top-level sysctl names are non-terminal 163 */ 164 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 165 return (EINVAL); 166 error = copyin(SCARG(uap, name), &name, 167 SCARG(uap, namelen) * sizeof(int)); 168 if (error) 169 return (error); 170 171 /* 172 * For all but CTL_PROC, must be root to change a value. 173 * For CTL_PROC, must be root, or owner of the proc (and not suid), 174 * this is checked in proc_sysctl() (once we know the targer proc). 175 */ 176 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 177 (error = suser(p->p_ucred, &p->p_acflag))) 178 return (error); 179 180 switch (name[0]) { 181 case CTL_KERN: 182 fn = kern_sysctl; 183 break; 184 case CTL_HW: 185 fn = hw_sysctl; 186 break; 187 case CTL_VM: 188 fn = uvm_sysctl; 189 break; 190 case CTL_NET: 191 fn = net_sysctl; 192 break; 193 case CTL_VFS: 194 fn = vfs_sysctl; 195 break; 196 case CTL_MACHDEP: 197 fn = cpu_sysctl; 198 break; 199 #ifdef DEBUG 200 case CTL_DEBUG: 201 fn = debug_sysctl; 202 break; 203 #endif 204 #ifdef DDB 205 case CTL_DDB: 206 fn = ddb_sysctl; 207 break; 208 #endif 209 case CTL_PROC: 210 fn = proc_sysctl; 211 break; 212 213 case CTL_EMUL: 214 fn = emul_sysctl; 215 break; 216 default: 217 return (EOPNOTSUPP); 218 } 219 220 /* 221 * XXX Hey, we wire `old', but what about `new'? 222 */ 223 224 if (SCARG(uap, oldlenp)) { 225 if ((error = copyin(SCARG(uap, oldlenp), &oldlen, 226 sizeof(oldlen)))) 227 return (error); 228 } 229 if (SCARG(uap, old) != NULL) { 230 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 231 if (error) 232 return (error); 233 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 234 if (error) { 235 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 236 return (error); 237 } 238 savelen = oldlen; 239 } 240 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 241 &oldlen, SCARG(uap, new), SCARG(uap, newlen), p); 242 if (SCARG(uap, old) != NULL) { 243 uvm_vsunlock(p, SCARG(uap, old), savelen); 244 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 245 } 246 if (error) 247 return (error); 248 if (SCARG(uap, oldlenp)) 249 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 250 return (error); 251 } 252 253 /* 254 * Attributes stored in the kernel. 255 */ 256 char hostname[MAXHOSTNAMELEN]; 257 int hostnamelen; 258 259 char domainname[MAXHOSTNAMELEN]; 260 int domainnamelen; 261 262 long hostid; 263 264 #ifdef INSECURE 265 int securelevel = -1; 266 #else 267 int securelevel = 0; 268 #endif 269 270 #ifndef DEFCORENAME 271 #define DEFCORENAME "%n.core" 272 #endif 273 char defcorename[MAXPATHLEN] = DEFCORENAME; 274 int defcorenamelen = sizeof(DEFCORENAME); 275 276 extern int kern_logsigexit; 277 extern fixpt_t ccpu; 278 extern int forkfsleep; 279 extern int dumponpanic; 280 281 #ifndef MULTIPROCESSOR 282 #define sysctl_ncpus() 1 283 #endif 284 285 #ifdef MULTIPROCESSOR 286 287 #ifndef CPU_INFO_FOREACH 288 #define CPU_INFO_ITERATOR int 289 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 290 #endif 291 292 static int 293 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 294 { 295 u_int64_t cp_time[CPUSTATES]; 296 int i; 297 struct cpu_info *ci; 298 CPU_INFO_ITERATOR cii; 299 300 for (i = 0; i < CPUSTATES; i++) 301 cp_time[i] = 0; 302 303 for (CPU_INFO_FOREACH(cii, ci)) { 304 for (i = 0; i < CPUSTATES; i++) 305 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 306 } 307 return (sysctl_rdstruct(oldp, oldlenp, newp, 308 cp_time, sizeof(cp_time))); 309 } 310 311 static int 312 sysctl_ncpus(void) 313 { 314 struct cpu_info *ci; 315 CPU_INFO_ITERATOR cii; 316 317 int ncpus = 0; 318 for (CPU_INFO_FOREACH(cii, ci)) 319 ncpus++; 320 return (ncpus); 321 } 322 323 #endif 324 325 /* 326 * kernel related system variables. 327 */ 328 int 329 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 330 void *newp, size_t newlen, struct proc *p) 331 { 332 int error, level, inthostid; 333 int old_autonicetime; 334 int old_vnodes; 335 dev_t consdev; 336 #if NRND > 0 337 int v; 338 #endif 339 340 /* All sysctl names at this level, except for a few, are terminal. */ 341 switch (name[0]) { 342 case KERN_PROC: 343 case KERN_PROC2: 344 case KERN_LWP: 345 case KERN_PROF: 346 case KERN_MBUF: 347 case KERN_PROC_ARGS: 348 case KERN_SYSVIPC_INFO: 349 case KERN_PIPE: 350 case KERN_TKSTAT: 351 /* Not terminal. */ 352 break; 353 default: 354 if (namelen != 1) 355 return (ENOTDIR); /* overloaded */ 356 } 357 358 switch (name[0]) { 359 case KERN_OSTYPE: 360 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 361 case KERN_OSRELEASE: 362 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 363 case KERN_OSREV: 364 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 365 case KERN_VERSION: 366 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 367 case KERN_MAXVNODES: 368 old_vnodes = desiredvnodes; 369 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 370 if (newp && !error) { 371 if (old_vnodes > desiredvnodes) { 372 error = vfs_drainvnodes(desiredvnodes, p); 373 if (error) { 374 desiredvnodes = old_vnodes; 375 return error; 376 } 377 } 378 vfs_reinit(); 379 nchreinit(); 380 } 381 return (error); 382 case KERN_MAXPROC: 383 { 384 int nmaxproc = maxproc; 385 386 error = sysctl_int(oldp, oldlenp, newp, newlen, &nmaxproc); 387 388 if (!error && newp) { 389 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 390 return (EINVAL); 391 392 #ifdef __HAVE_CPU_MAXPROC 393 if (nmaxproc > cpu_maxproc()) 394 return (EINVAL); 395 #endif 396 maxproc = nmaxproc; 397 } 398 399 return (error); 400 } 401 case KERN_MAXFILES: 402 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 403 case KERN_ARGMAX: 404 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 405 case KERN_SECURELVL: 406 level = securelevel; 407 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 408 newp == NULL) 409 return (error); 410 if (level < securelevel && p->p_pid != 1) 411 return (EPERM); 412 securelevel = level; 413 return (0); 414 case KERN_HOSTNAME: 415 error = sysctl_string(oldp, oldlenp, newp, newlen, 416 hostname, sizeof(hostname)); 417 if (newp && !error) 418 hostnamelen = newlen; 419 return (error); 420 case KERN_DOMAINNAME: 421 error = sysctl_string(oldp, oldlenp, newp, newlen, 422 domainname, sizeof(domainname)); 423 if (newp && !error) 424 domainnamelen = newlen; 425 return (error); 426 case KERN_HOSTID: 427 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 428 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 429 if (newp && !error) 430 hostid = inthostid; 431 return (error); 432 case KERN_CLOCKRATE: 433 return (sysctl_clockrate(oldp, oldlenp)); 434 case KERN_BOOTTIME: 435 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 436 sizeof(struct timeval))); 437 case KERN_VNODE: 438 return (sysctl_vnode(oldp, oldlenp, p)); 439 case KERN_PROC: 440 case KERN_PROC2: 441 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 442 case KERN_LWP: 443 return (sysctl_dolwp(name, namelen, oldp, oldlenp)); 444 case KERN_PROC_ARGS: 445 return (sysctl_procargs(name + 1, namelen - 1, 446 oldp, oldlenp, p)); 447 case KERN_FILE: 448 return (sysctl_file(oldp, oldlenp)); 449 #ifdef GPROF 450 case KERN_PROF: 451 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 452 newp, newlen)); 453 #endif 454 case KERN_POSIX1: 455 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 456 case KERN_NGROUPS: 457 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 458 case KERN_JOB_CONTROL: 459 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 460 case KERN_SAVED_IDS: 461 #ifdef _POSIX_SAVED_IDS 462 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 463 #else 464 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 465 #endif 466 case KERN_MAXPARTITIONS: 467 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 468 case KERN_RAWPARTITION: 469 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 470 #ifdef NTP 471 case KERN_NTPTIME: 472 return (sysctl_ntptime(oldp, oldlenp)); 473 #endif 474 case KERN_AUTONICETIME: 475 old_autonicetime = autonicetime; 476 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 477 if (autonicetime < 0) 478 autonicetime = old_autonicetime; 479 return (error); 480 case KERN_AUTONICEVAL: 481 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 482 if (autoniceval < PRIO_MIN) 483 autoniceval = PRIO_MIN; 484 if (autoniceval > PRIO_MAX) 485 autoniceval = PRIO_MAX; 486 return (error); 487 case KERN_RTC_OFFSET: 488 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 489 case KERN_ROOT_DEVICE: 490 return (sysctl_rdstring(oldp, oldlenp, newp, 491 root_device->dv_xname)); 492 case KERN_MSGBUFSIZE: 493 /* 494 * deal with cases where the message buffer has 495 * become corrupted. 496 */ 497 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 498 msgbufenabled = 0; 499 return (ENXIO); 500 } 501 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 502 case KERN_FSYNC: 503 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 504 case KERN_SYSVMSG: 505 #ifdef SYSVMSG 506 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 507 #else 508 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 509 #endif 510 case KERN_SYSVSEM: 511 #ifdef SYSVSEM 512 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 513 #else 514 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 515 #endif 516 case KERN_SYSVSHM: 517 #ifdef SYSVSHM 518 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 519 #else 520 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 521 #endif 522 case KERN_DEFCORENAME: 523 if (newp && newlen < 1) 524 return (EINVAL); 525 error = sysctl_string(oldp, oldlenp, newp, newlen, 526 defcorename, sizeof(defcorename)); 527 if (newp && !error) 528 defcorenamelen = newlen; 529 return (error); 530 case KERN_SYNCHRONIZED_IO: 531 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 532 case KERN_IOV_MAX: 533 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 534 case KERN_MBUF: 535 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 536 newp, newlen)); 537 case KERN_MAPPED_FILES: 538 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 539 case KERN_MEMLOCK: 540 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 541 case KERN_MEMLOCK_RANGE: 542 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 543 case KERN_MEMORY_PROTECTION: 544 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 545 case KERN_LOGIN_NAME_MAX: 546 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 547 case KERN_LOGSIGEXIT: 548 return (sysctl_int(oldp, oldlenp, newp, newlen, 549 &kern_logsigexit)); 550 case KERN_FSCALE: 551 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 552 case KERN_CCPU: 553 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 554 case KERN_CP_TIME: 555 #ifndef MULTIPROCESSOR 556 return (sysctl_rdstruct(oldp, oldlenp, newp, 557 curcpu()->ci_schedstate.spc_cp_time, 558 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 559 #else 560 return (sysctl_docptime(oldp, oldlenp, newp)); 561 #endif 562 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 563 case KERN_SYSVIPC_INFO: 564 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 565 #endif 566 case KERN_MSGBUF: 567 return (sysctl_msgbuf(oldp, oldlenp)); 568 case KERN_CONSDEV: 569 if (cn_tab != NULL) 570 consdev = cn_tab->cn_dev; 571 else 572 consdev = NODEV; 573 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 574 sizeof consdev)); 575 #if NPTY > 0 576 case KERN_MAXPTYS: 577 return (sysctl_pty(oldp, oldlenp, newp, newlen)); 578 #endif 579 #ifndef PIPE_SOCKETPAIR 580 case KERN_PIPE: 581 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 582 newp, newlen)); 583 #endif 584 case KERN_MAXPHYS: 585 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 586 case KERN_SOMAXKVA: 587 { 588 int new_somaxkva = somaxkva; 589 590 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_somaxkva); 591 if (newp && !error) { 592 if (new_somaxkva < (16 * 1024 * 1024)) /* sanity */ 593 return (EINVAL); 594 somaxkva = new_somaxkva; 595 } 596 return (error); 597 } 598 case KERN_SBMAX: 599 { 600 int new_sbmax = sb_max; 601 602 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 603 if (newp && !error) { 604 if (new_sbmax < (16 * 1024)) /* sanity */ 605 return (EINVAL); 606 sb_max = new_sbmax; 607 } 608 return (error); 609 } 610 case KERN_TKSTAT: 611 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 612 newp)); 613 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 614 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 615 case KERN_URND: 616 #if NRND > 0 617 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 618 sizeof(v)) 619 return (sysctl_rdint(oldp, oldlenp, newp, v)); 620 else 621 return (EIO); /*XXX*/ 622 #else 623 return (EOPNOTSUPP); 624 #endif 625 case KERN_LABELSECTOR: 626 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 627 case KERN_LABELOFFSET: 628 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 629 case KERN_FORKFSLEEP: 630 { 631 /* userland sees value in ms, internally is in ticks */ 632 int timo, lsleep = forkfsleep * 1000 / hz; 633 634 error = sysctl_int(oldp, oldlenp, newp, newlen, &lsleep); 635 if (newp && !error) { 636 /* refuse negative values, and overly 'long time' */ 637 if (lsleep < 0 || lsleep > MAXSLP * 1000) 638 return (EINVAL); 639 640 timo = mstohz(lsleep); 641 642 /* if the interval is >0 ms && <1 tick, use 1 tick */ 643 if (lsleep != 0 && timo == 0) 644 forkfsleep = 1; 645 else 646 forkfsleep = timo; 647 } 648 return (error); 649 } 650 case KERN_POSIX_THREADS: /* XXX _POSIX_VERSION */ 651 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 652 case KERN_POSIX_SEMAPHORES: /* XXX _POSIX_VERSION */ 653 #ifdef P1003_1B_SEMAPHORE 654 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 655 #else 656 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 657 #endif 658 case KERN_POSIX_BARRIERS: /* XXX _POSIX_VERSION */ 659 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 660 case KERN_POSIX_TIMERS: /* XXX _POSIX_VERSION */ 661 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 662 case KERN_POSIX_SPIN_LOCKS: /* XXX _POSIX_VERSION */ 663 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 664 case KERN_POSIX_READER_WRITER_LOCKS: /* XXX _POSIX_VERSION */ 665 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 666 case KERN_DUMP_ON_PANIC: 667 return (sysctl_int(oldp, oldlenp, newp, newlen, &dumponpanic)); 668 669 default: 670 return (EOPNOTSUPP); 671 } 672 /* NOTREACHED */ 673 } 674 675 /* 676 * hardware related system variables. 677 */ 678 int 679 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 680 void *newp, size_t newlen, struct proc *p) 681 { 682 683 /* All sysctl names at this level, except for a few, are terminal. */ 684 switch (name[0]) { 685 case HW_DISKSTATS: 686 /* Not terminal. */ 687 break; 688 default: 689 if (namelen != 1) 690 return (ENOTDIR); /* overloaded */ 691 } 692 693 switch (name[0]) { 694 case HW_MACHINE: 695 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 696 case HW_MACHINE_ARCH: 697 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 698 case HW_MODEL: 699 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 700 case HW_NCPU: 701 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 702 case HW_BYTEORDER: 703 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 704 case HW_PHYSMEM: 705 { 706 u_int rval; 707 708 if ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) 709 rval = UINT_MAX; 710 else 711 rval = physmem * PAGE_SIZE; 712 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 713 } 714 case HW_PHYSMEM64: 715 return (sysctl_rdquad(oldp, oldlenp, newp, 716 (u_quad_t)physmem * PAGE_SIZE)); 717 case HW_USERMEM: 718 { 719 u_int rval; 720 721 if ((u_int)(physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 722 rval = UINT_MAX; 723 else 724 rval = (physmem - uvmexp.wired) * PAGE_SIZE; 725 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 726 } 727 case HW_USERMEM64: 728 return (sysctl_rdquad(oldp, oldlenp, newp, 729 (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE)); 730 case HW_PAGESIZE: 731 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 732 case HW_ALIGNBYTES: 733 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 734 case HW_DISKNAMES: 735 return (sysctl_disknames(oldp, oldlenp)); 736 case HW_DISKSTATS: 737 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 738 case HW_CNMAGIC: { 739 char magic[CNS_LEN]; 740 int error; 741 742 if (oldp) 743 cn_get_magic(magic, CNS_LEN); 744 error = sysctl_string(oldp, oldlenp, newp, newlen, 745 magic, sizeof(magic)); 746 if (newp && !error) { 747 error = cn_set_magic(magic); 748 } 749 return (error); 750 } 751 default: 752 return (EOPNOTSUPP); 753 } 754 /* NOTREACHED */ 755 } 756 757 #ifdef DEBUG 758 /* 759 * Debugging related system variables. 760 */ 761 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 762 struct ctldebug debug5, debug6, debug7, debug8, debug9; 763 struct ctldebug debug10, debug11, debug12, debug13, debug14; 764 struct ctldebug debug15, debug16, debug17, debug18, debug19; 765 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 766 &debug0, &debug1, &debug2, &debug3, &debug4, 767 &debug5, &debug6, &debug7, &debug8, &debug9, 768 &debug10, &debug11, &debug12, &debug13, &debug14, 769 &debug15, &debug16, &debug17, &debug18, &debug19, 770 }; 771 772 int 773 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 774 void *newp, size_t newlen, struct proc *p) 775 { 776 struct ctldebug *cdp; 777 778 /* all sysctl names at this level are name and field */ 779 if (namelen != 2) 780 return (ENOTDIR); /* overloaded */ 781 if (name[0] >= CTL_DEBUG_MAXID) 782 return (EOPNOTSUPP); 783 cdp = debugvars[name[0]]; 784 if (cdp->debugname == 0) 785 return (EOPNOTSUPP); 786 switch (name[1]) { 787 case CTL_DEBUG_NAME: 788 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 789 case CTL_DEBUG_VALUE: 790 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 791 default: 792 return (EOPNOTSUPP); 793 } 794 /* NOTREACHED */ 795 } 796 #endif /* DEBUG */ 797 798 int 799 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 800 void *newp, size_t newlen, struct proc *p) 801 { 802 struct proc *ptmp = NULL; 803 const struct proclist_desc *pd; 804 int error = 0; 805 struct rlimit alim; 806 struct plimit *newplim; 807 char *tmps = NULL; 808 size_t len, curlen; 809 u_int i; 810 811 if (namelen < 2) 812 return (EINVAL); 813 814 if (name[0] == PROC_CURPROC) { 815 ptmp = p; 816 } else { 817 proclist_lock_read(); 818 for (pd = proclists; pd->pd_list != NULL; pd++) { 819 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 820 ptmp = LIST_NEXT(ptmp, p_list)) { 821 /* Skip embryonic processes. */ 822 if (ptmp->p_stat == SIDL) 823 continue; 824 if (ptmp->p_pid == (pid_t)name[0]) 825 break; 826 } 827 if (ptmp != NULL) 828 break; 829 } 830 proclist_unlock_read(); 831 if (ptmp == NULL) 832 return (ESRCH); 833 if (p->p_ucred->cr_uid != 0) { 834 if (p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 835 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 836 return (EPERM); 837 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 838 return (EPERM); /* sgid proc */ 839 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 840 if (p->p_ucred->cr_groups[i] == 841 ptmp->p_cred->p_rgid) 842 break; 843 } 844 if (i == p->p_ucred->cr_ngroups) 845 return (EPERM); 846 } 847 } 848 switch (name[1]) { 849 case PROC_PID_STOPFORK: 850 if (namelen != 2) 851 return (EINVAL); 852 i = ((ptmp->p_flag & P_STOPFORK) != 0); 853 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 854 return (error); 855 if (i != 0) 856 ptmp->p_flag |= P_STOPFORK; 857 else 858 ptmp->p_flag &= ~P_STOPFORK; 859 return (0); 860 break; 861 862 case PROC_PID_STOPEXEC: 863 if (namelen != 2) 864 return (EINVAL); 865 i = ((ptmp->p_flag & P_STOPEXEC) != 0); 866 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 867 return (error); 868 if (i != 0) 869 ptmp->p_flag |= P_STOPEXEC; 870 else 871 ptmp->p_flag &= ~P_STOPEXEC; 872 return (0); 873 break; 874 875 case PROC_PID_CORENAME: 876 if (namelen != 2) 877 return (EINVAL); 878 /* 879 * Can't use sysctl_string() here because we may malloc a new 880 * area during the process, so we have to do it by hand. 881 */ 882 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 883 if (oldlenp && *oldlenp < curlen) { 884 if (!oldp) 885 *oldlenp = curlen; 886 return (ENOMEM); 887 } 888 if (newp) { 889 if (securelevel > 2) 890 return (EPERM); 891 if (newlen > MAXPATHLEN) 892 return (ENAMETOOLONG); 893 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 894 if (tmps == NULL) 895 return (ENOMEM); 896 error = copyin(newp, tmps, newlen + 1); 897 tmps[newlen] = '\0'; 898 if (error) 899 goto cleanup; 900 /* Enforce to be either 'core' for end with '.core' */ 901 if (newlen < 4) { /* c.o.r.e */ 902 error = EINVAL; 903 goto cleanup; 904 } 905 len = newlen - 4; 906 if (len > 0) { 907 if (tmps[len - 1] != '.' && 908 tmps[len - 1] != '/') { 909 error = EINVAL; 910 goto cleanup; 911 } 912 } 913 if (strcmp(&tmps[len], "core") != 0) { 914 error = EINVAL; 915 goto cleanup; 916 } 917 } 918 if (oldp && oldlenp) { 919 *oldlenp = curlen; 920 error = copyout(ptmp->p_limit->pl_corename, oldp, 921 curlen); 922 } 923 if (newp && error == 0) { 924 /* if the 2 strings are identical, don't limcopy() */ 925 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 926 error = 0; 927 goto cleanup; 928 } 929 if (ptmp->p_limit->p_refcnt > 1 && 930 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 931 newplim = limcopy(ptmp->p_limit); 932 limfree(ptmp->p_limit); 933 ptmp->p_limit = newplim; 934 } 935 if (ptmp->p_limit->pl_corename != defcorename) { 936 free(ptmp->p_limit->pl_corename, M_TEMP); 937 } 938 ptmp->p_limit->pl_corename = tmps; 939 return (0); 940 } 941 cleanup: 942 if (tmps) 943 free(tmps, M_TEMP); 944 return (error); 945 break; 946 947 case PROC_PID_LIMIT: 948 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 949 return (EINVAL); 950 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 951 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 952 error = sysctl_quad(oldp, oldlenp, newp, newlen, 953 &alim.rlim_max); 954 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 955 error = sysctl_quad(oldp, oldlenp, newp, newlen, 956 &alim.rlim_cur); 957 else 958 error = (EINVAL); 959 960 if (error) 961 return (error); 962 963 if (newp) 964 error = dosetrlimit(ptmp, p->p_cred, 965 name[2] - 1, &alim); 966 return (error); 967 break; 968 969 default: 970 return (EINVAL); 971 break; 972 } 973 /* NOTREACHED */ 974 return (EINVAL); 975 } 976 977 int 978 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 979 void *newp, size_t newlen, struct proc *p) 980 { 981 static struct { 982 const char *name; 983 int type; 984 } emulations[] = CTL_EMUL_NAMES; 985 const struct emul *e; 986 const char *ename; 987 #ifdef LKM 988 extern struct lock exec_lock; /* XXX */ 989 int error; 990 #else 991 extern int nexecs_builtin; 992 extern const struct execsw execsw_builtin[]; 993 int i; 994 #endif 995 996 /* all sysctl names at this level are name and field */ 997 if (namelen < 2) 998 return (ENOTDIR); /* overloaded */ 999 1000 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 1001 return (EOPNOTSUPP); 1002 1003 ename = emulations[name[0]].name; 1004 1005 #ifdef LKM 1006 lockmgr(&exec_lock, LK_SHARED, NULL); 1007 if ((e = emul_search(ename))) { 1008 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1009 newp, newlen, p); 1010 } else 1011 error = EOPNOTSUPP; 1012 lockmgr(&exec_lock, LK_RELEASE, NULL); 1013 1014 return (error); 1015 #else 1016 for (i = 0; i < nexecs_builtin; i++) { 1017 e = execsw_builtin[i].es_emul; 1018 /* 1019 * In order to match e.g. e->e_name "irix o32" 1020 * with ename "irix", we limit the comparison 1021 * to the length of ename. 1022 */ 1023 if (e == NULL || 1024 strncmp(ename, e->e_name, strlen(ename)) != 0 || 1025 e->e_sysctl == NULL) 1026 continue; 1027 1028 return ((*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1029 newp, newlen, p)); 1030 } 1031 1032 return (EOPNOTSUPP); 1033 #endif 1034 } 1035 /* 1036 * Convenience macros. 1037 */ 1038 1039 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 1040 if (oldlenp) { \ 1041 if (!oldp) \ 1042 *oldlenp = len; \ 1043 else { \ 1044 if (*oldlenp < len) \ 1045 return (ENOMEM); \ 1046 *oldlenp = len; \ 1047 error = copyout((caddr_t)valp, oldp, len); \ 1048 } \ 1049 } 1050 1051 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 1052 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 1053 1054 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 1055 if (newp && newlen != len) \ 1056 return (EINVAL); 1057 1058 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1059 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1060 1061 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1062 if (error == 0 && newp) \ 1063 error = copyin(newp, valp, len); 1064 1065 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1066 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1067 1068 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1069 if (oldlenp) { \ 1070 len = strlen(str) + 1; \ 1071 if (!oldp) \ 1072 *oldlenp = len; \ 1073 else { \ 1074 if (*oldlenp < len) { \ 1075 err2 = ENOMEM; \ 1076 len = *oldlenp; \ 1077 } else \ 1078 *oldlenp = len; \ 1079 error = copyout(str, oldp, len);\ 1080 if (error == 0) \ 1081 error = err2; \ 1082 } \ 1083 } 1084 1085 /* 1086 * Validate parameters and get old / set new parameters 1087 * for an integer-valued sysctl function. 1088 */ 1089 int 1090 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1091 { 1092 int error = 0; 1093 1094 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1095 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1096 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1097 1098 return (error); 1099 } 1100 1101 1102 /* 1103 * As above, but read-only. 1104 */ 1105 int 1106 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1107 { 1108 int error = 0; 1109 1110 if (newp) 1111 return (EPERM); 1112 1113 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1114 1115 return (error); 1116 } 1117 1118 /* 1119 * Validate parameters and get old / set new parameters 1120 * for an quad-valued sysctl function. 1121 */ 1122 int 1123 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1124 quad_t *valp) 1125 { 1126 int error = 0; 1127 1128 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1129 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1130 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1131 1132 return (error); 1133 } 1134 1135 /* 1136 * As above, but read-only. 1137 */ 1138 int 1139 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1140 { 1141 int error = 0; 1142 1143 if (newp) 1144 return (EPERM); 1145 1146 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1147 1148 return (error); 1149 } 1150 1151 /* 1152 * Validate parameters and get old / set new parameters 1153 * for a string-valued sysctl function. 1154 */ 1155 int 1156 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1157 size_t maxlen) 1158 { 1159 int error = 0, err2 = 0; 1160 size_t len; 1161 1162 if (newp && newlen >= maxlen) 1163 return (EINVAL); 1164 1165 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1166 1167 if (error == 0 && newp) { 1168 error = copyin(newp, str, newlen); 1169 str[newlen] = 0; 1170 } 1171 return (error); 1172 } 1173 1174 /* 1175 * As above, but read-only. 1176 */ 1177 int 1178 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1179 { 1180 int error = 0, err2 = 0; 1181 size_t len; 1182 1183 if (newp) 1184 return (EPERM); 1185 1186 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1187 1188 return (error); 1189 } 1190 1191 /* 1192 * Validate parameters and get old / set new parameters 1193 * for a structure oriented sysctl function. 1194 */ 1195 int 1196 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1197 size_t len) 1198 { 1199 int error = 0; 1200 1201 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1202 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1203 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1204 1205 return (error); 1206 } 1207 1208 /* 1209 * Validate parameters and get old parameters 1210 * for a structure oriented sysctl function. 1211 */ 1212 int 1213 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1214 size_t len) 1215 { 1216 int error = 0; 1217 1218 if (newp) 1219 return (EPERM); 1220 1221 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1222 1223 return (error); 1224 } 1225 1226 /* 1227 * As above, but can return a truncated result. 1228 */ 1229 int 1230 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1231 size_t len) 1232 { 1233 int error = 0; 1234 1235 if (newp) 1236 return (EPERM); 1237 1238 len = min(*oldlenp, len); 1239 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1240 1241 return (error); 1242 } 1243 1244 /* 1245 * Get file structures. 1246 */ 1247 static int 1248 sysctl_file(void *vwhere, size_t *sizep) 1249 { 1250 int error; 1251 size_t buflen; 1252 struct file *fp; 1253 char *start, *where; 1254 1255 start = where = vwhere; 1256 buflen = *sizep; 1257 if (where == NULL) { 1258 /* 1259 * overestimate by 10 files 1260 */ 1261 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1262 return (0); 1263 } 1264 1265 /* 1266 * first copyout filehead 1267 */ 1268 if (buflen < sizeof(filehead)) { 1269 *sizep = 0; 1270 return (0); 1271 } 1272 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1273 if (error) 1274 return (error); 1275 buflen -= sizeof(filehead); 1276 where += sizeof(filehead); 1277 1278 /* 1279 * followed by an array of file structures 1280 */ 1281 LIST_FOREACH(fp, &filehead, f_list) { 1282 if (buflen < sizeof(struct file)) { 1283 *sizep = where - start; 1284 return (ENOMEM); 1285 } 1286 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1287 if (error) 1288 return (error); 1289 buflen -= sizeof(struct file); 1290 where += sizeof(struct file); 1291 } 1292 *sizep = where - start; 1293 return (0); 1294 } 1295 1296 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1297 #define FILL_PERM(src, dst) do { \ 1298 (dst)._key = (src)._key; \ 1299 (dst).uid = (src).uid; \ 1300 (dst).gid = (src).gid; \ 1301 (dst).cuid = (src).cuid; \ 1302 (dst).cgid = (src).cgid; \ 1303 (dst).mode = (src).mode; \ 1304 (dst)._seq = (src)._seq; \ 1305 } while (/*CONSTCOND*/ 0); 1306 #define FILL_MSG(src, dst) do { \ 1307 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1308 (dst).msg_qnum = (src).msg_qnum; \ 1309 (dst).msg_qbytes = (src).msg_qbytes; \ 1310 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1311 (dst).msg_lspid = (src).msg_lspid; \ 1312 (dst).msg_lrpid = (src).msg_lrpid; \ 1313 (dst).msg_stime = (src).msg_stime; \ 1314 (dst).msg_rtime = (src).msg_rtime; \ 1315 (dst).msg_ctime = (src).msg_ctime; \ 1316 } while (/*CONSTCOND*/ 0) 1317 #define FILL_SEM(src, dst) do { \ 1318 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1319 (dst).sem_nsems = (src).sem_nsems; \ 1320 (dst).sem_otime = (src).sem_otime; \ 1321 (dst).sem_ctime = (src).sem_ctime; \ 1322 } while (/*CONSTCOND*/ 0) 1323 #define FILL_SHM(src, dst) do { \ 1324 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1325 (dst).shm_segsz = (src).shm_segsz; \ 1326 (dst).shm_lpid = (src).shm_lpid; \ 1327 (dst).shm_cpid = (src).shm_cpid; \ 1328 (dst).shm_atime = (src).shm_atime; \ 1329 (dst).shm_dtime = (src).shm_dtime; \ 1330 (dst).shm_ctime = (src).shm_ctime; \ 1331 (dst).shm_nattch = (src).shm_nattch; \ 1332 } while (/*CONSTCOND*/ 0) 1333 1334 static int 1335 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1336 { 1337 #ifdef SYSVMSG 1338 struct msg_sysctl_info *msgsi = NULL; 1339 #endif 1340 #ifdef SYSVSEM 1341 struct sem_sysctl_info *semsi = NULL; 1342 #endif 1343 #ifdef SYSVSHM 1344 struct shm_sysctl_info *shmsi = NULL; 1345 #endif 1346 size_t infosize, dssize, tsize, buflen; 1347 void *buf = NULL; 1348 char *start; 1349 int32_t nds; 1350 int i, error, ret; 1351 1352 if (namelen != 1) 1353 return (EINVAL); 1354 1355 start = where; 1356 buflen = *sizep; 1357 1358 switch (*name) { 1359 case KERN_SYSVIPC_MSG_INFO: 1360 #ifdef SYSVMSG 1361 infosize = sizeof(msgsi->msginfo); 1362 nds = msginfo.msgmni; 1363 dssize = sizeof(msgsi->msgids[0]); 1364 break; 1365 #else 1366 return (EINVAL); 1367 #endif 1368 case KERN_SYSVIPC_SEM_INFO: 1369 #ifdef SYSVSEM 1370 infosize = sizeof(semsi->seminfo); 1371 nds = seminfo.semmni; 1372 dssize = sizeof(semsi->semids[0]); 1373 break; 1374 #else 1375 return (EINVAL); 1376 #endif 1377 case KERN_SYSVIPC_SHM_INFO: 1378 #ifdef SYSVSHM 1379 infosize = sizeof(shmsi->shminfo); 1380 nds = shminfo.shmmni; 1381 dssize = sizeof(shmsi->shmids[0]); 1382 break; 1383 #else 1384 return (EINVAL); 1385 #endif 1386 default: 1387 return (EINVAL); 1388 } 1389 /* 1390 * Round infosize to 64 bit boundary if requesting more than just 1391 * the info structure or getting the total data size. 1392 */ 1393 if (where == NULL || *sizep > infosize) 1394 infosize = ((infosize + 7) / 8) * 8; 1395 tsize = infosize + nds * dssize; 1396 1397 /* Return just the total size required. */ 1398 if (where == NULL) { 1399 *sizep = tsize; 1400 return (0); 1401 } 1402 1403 /* Not enough room for even the info struct. */ 1404 if (buflen < infosize) { 1405 *sizep = 0; 1406 return (ENOMEM); 1407 } 1408 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1409 memset(buf, 0, min(tsize, buflen)); 1410 1411 switch (*name) { 1412 #ifdef SYSVMSG 1413 case KERN_SYSVIPC_MSG_INFO: 1414 msgsi = (struct msg_sysctl_info *)buf; 1415 msgsi->msginfo = msginfo; 1416 break; 1417 #endif 1418 #ifdef SYSVSEM 1419 case KERN_SYSVIPC_SEM_INFO: 1420 semsi = (struct sem_sysctl_info *)buf; 1421 semsi->seminfo = seminfo; 1422 break; 1423 #endif 1424 #ifdef SYSVSHM 1425 case KERN_SYSVIPC_SHM_INFO: 1426 shmsi = (struct shm_sysctl_info *)buf; 1427 shmsi->shminfo = shminfo; 1428 break; 1429 #endif 1430 } 1431 buflen -= infosize; 1432 1433 ret = 0; 1434 if (buflen > 0) { 1435 /* Fill in the IPC data structures. */ 1436 for (i = 0; i < nds; i++) { 1437 if (buflen < dssize) { 1438 ret = ENOMEM; 1439 break; 1440 } 1441 switch (*name) { 1442 #ifdef SYSVMSG 1443 case KERN_SYSVIPC_MSG_INFO: 1444 FILL_MSG(msqids[i], msgsi->msgids[i]); 1445 break; 1446 #endif 1447 #ifdef SYSVSEM 1448 case KERN_SYSVIPC_SEM_INFO: 1449 FILL_SEM(sema[i], semsi->semids[i]); 1450 break; 1451 #endif 1452 #ifdef SYSVSHM 1453 case KERN_SYSVIPC_SHM_INFO: 1454 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1455 break; 1456 #endif 1457 } 1458 buflen -= dssize; 1459 } 1460 } 1461 *sizep -= buflen; 1462 error = copyout(buf, start, *sizep); 1463 /* If copyout succeeded, use return code set earlier. */ 1464 if (error == 0) 1465 error = ret; 1466 if (buf) 1467 free(buf, M_TEMP); 1468 return (error); 1469 } 1470 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1471 1472 static int 1473 sysctl_msgbuf(void *vwhere, size_t *sizep) 1474 { 1475 char *where = vwhere; 1476 size_t len, maxlen = *sizep; 1477 long beg, end; 1478 int error; 1479 1480 /* 1481 * deal with cases where the message buffer has 1482 * become corrupted. 1483 */ 1484 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1485 msgbufenabled = 0; 1486 return (ENXIO); 1487 } 1488 1489 if (where == NULL) { 1490 /* always return full buffer size */ 1491 *sizep = msgbufp->msg_bufs; 1492 return (0); 1493 } 1494 1495 error = 0; 1496 maxlen = min(msgbufp->msg_bufs, maxlen); 1497 1498 /* 1499 * First, copy from the write pointer to the end of 1500 * message buffer. 1501 */ 1502 beg = msgbufp->msg_bufx; 1503 end = msgbufp->msg_bufs; 1504 while (maxlen > 0) { 1505 len = min(end - beg, maxlen); 1506 if (len == 0) 1507 break; 1508 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1509 if (error) 1510 break; 1511 where += len; 1512 maxlen -= len; 1513 1514 /* 1515 * ... then, copy from the beginning of message buffer to 1516 * the write pointer. 1517 */ 1518 beg = 0; 1519 end = msgbufp->msg_bufx; 1520 } 1521 return (error); 1522 } 1523 1524 /* 1525 * try over estimating by 5 procs 1526 */ 1527 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1528 1529 static int 1530 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1531 { 1532 struct eproc eproc; 1533 struct kinfo_proc2 kproc2; 1534 struct kinfo_proc *dp; 1535 struct proc *p; 1536 const struct proclist_desc *pd; 1537 char *where, *dp2; 1538 int type, op, arg; 1539 u_int elem_size, elem_count; 1540 size_t buflen, needed; 1541 int error; 1542 1543 dp = vwhere; 1544 dp2 = where = vwhere; 1545 buflen = where != NULL ? *sizep : 0; 1546 error = 0; 1547 needed = 0; 1548 type = name[0]; 1549 1550 if (type == KERN_PROC) { 1551 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1552 return (EINVAL); 1553 op = name[1]; 1554 if (op != KERN_PROC_ALL) 1555 arg = name[2]; 1556 else 1557 arg = 0; /* Quell compiler warning */ 1558 elem_size = elem_count = 0; /* Ditto */ 1559 } else { 1560 if (namelen != 5) 1561 return (EINVAL); 1562 op = name[1]; 1563 arg = name[2]; 1564 elem_size = name[3]; 1565 elem_count = name[4]; 1566 } 1567 1568 proclist_lock_read(); 1569 1570 pd = proclists; 1571 again: 1572 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1573 /* 1574 * Skip embryonic processes. 1575 */ 1576 if (p->p_stat == SIDL) 1577 continue; 1578 /* 1579 * TODO - make more efficient (see notes below). 1580 * do by session. 1581 */ 1582 switch (op) { 1583 1584 case KERN_PROC_PID: 1585 /* could do this with just a lookup */ 1586 if (p->p_pid != (pid_t)arg) 1587 continue; 1588 break; 1589 1590 case KERN_PROC_PGRP: 1591 /* could do this by traversing pgrp */ 1592 if (p->p_pgrp->pg_id != (pid_t)arg) 1593 continue; 1594 break; 1595 1596 case KERN_PROC_SESSION: 1597 if (p->p_session->s_sid != (pid_t)arg) 1598 continue; 1599 break; 1600 1601 case KERN_PROC_TTY: 1602 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1603 if ((p->p_flag & P_CONTROLT) == 0 || 1604 p->p_session->s_ttyp == NULL || 1605 p->p_session->s_ttyvp != NULL) 1606 continue; 1607 } else if ((p->p_flag & P_CONTROLT) == 0 || 1608 p->p_session->s_ttyp == NULL) { 1609 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1610 continue; 1611 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1612 continue; 1613 break; 1614 1615 case KERN_PROC_UID: 1616 if (p->p_ucred->cr_uid != (uid_t)arg) 1617 continue; 1618 break; 1619 1620 case KERN_PROC_RUID: 1621 if (p->p_cred->p_ruid != (uid_t)arg) 1622 continue; 1623 break; 1624 1625 case KERN_PROC_GID: 1626 if (p->p_ucred->cr_gid != (uid_t)arg) 1627 continue; 1628 break; 1629 1630 case KERN_PROC_RGID: 1631 if (p->p_cred->p_rgid != (uid_t)arg) 1632 continue; 1633 break; 1634 1635 case KERN_PROC_ALL: 1636 /* allow everything */ 1637 break; 1638 1639 default: 1640 error = EINVAL; 1641 goto cleanup; 1642 } 1643 if (type == KERN_PROC) { 1644 if (buflen >= sizeof(struct kinfo_proc)) { 1645 fill_eproc(p, &eproc); 1646 error = copyout((caddr_t)p, &dp->kp_proc, 1647 sizeof(struct proc)); 1648 if (error) 1649 goto cleanup; 1650 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1651 sizeof(eproc)); 1652 if (error) 1653 goto cleanup; 1654 dp++; 1655 buflen -= sizeof(struct kinfo_proc); 1656 } 1657 needed += sizeof(struct kinfo_proc); 1658 } else { /* KERN_PROC2 */ 1659 if (buflen >= elem_size && elem_count > 0) { 1660 fill_kproc2(p, &kproc2); 1661 /* 1662 * Copy out elem_size, but not larger than 1663 * the size of a struct kinfo_proc2. 1664 */ 1665 error = copyout(&kproc2, dp2, 1666 min(sizeof(kproc2), elem_size)); 1667 if (error) 1668 goto cleanup; 1669 dp2 += elem_size; 1670 buflen -= elem_size; 1671 elem_count--; 1672 } 1673 needed += elem_size; 1674 } 1675 } 1676 pd++; 1677 if (pd->pd_list != NULL) 1678 goto again; 1679 proclist_unlock_read(); 1680 1681 if (where != NULL) { 1682 if (type == KERN_PROC) 1683 *sizep = (caddr_t)dp - where; 1684 else 1685 *sizep = dp2 - where; 1686 if (needed > *sizep) 1687 return (ENOMEM); 1688 } else { 1689 needed += KERN_PROCSLOP; 1690 *sizep = needed; 1691 } 1692 return (0); 1693 cleanup: 1694 proclist_unlock_read(); 1695 return (error); 1696 } 1697 1698 1699 /* 1700 * try over estimating by 5 LWPs 1701 */ 1702 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1703 1704 static int 1705 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1706 { 1707 struct kinfo_lwp klwp; 1708 struct proc *p; 1709 struct lwp *l; 1710 char *where, *dp; 1711 int type, pid, elem_size, elem_count; 1712 int buflen, needed, error; 1713 1714 dp = where = vwhere; 1715 buflen = where != NULL ? *sizep : 0; 1716 error = needed = 0; 1717 type = name[0]; 1718 1719 if (namelen != 4) 1720 return (EINVAL); 1721 pid = name[1]; 1722 elem_size = name[2]; 1723 elem_count = name[3]; 1724 1725 p = pfind(pid); 1726 if (p == NULL) 1727 return (ESRCH); 1728 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1729 if (buflen >= elem_size && elem_count > 0) { 1730 fill_lwp(l, &klwp); 1731 /* 1732 * Copy out elem_size, but not larger than 1733 * the size of a struct kinfo_proc2. 1734 */ 1735 error = copyout(&klwp, dp, 1736 min(sizeof(klwp), elem_size)); 1737 if (error) 1738 goto cleanup; 1739 dp += elem_size; 1740 buflen -= elem_size; 1741 elem_count--; 1742 } 1743 needed += elem_size; 1744 } 1745 1746 if (where != NULL) { 1747 *sizep = dp - where; 1748 if (needed > *sizep) 1749 return (ENOMEM); 1750 } else { 1751 needed += KERN_PROCSLOP; 1752 *sizep = needed; 1753 } 1754 return (0); 1755 cleanup: 1756 return (error); 1757 } 1758 1759 /* 1760 * Fill in an eproc structure for the specified process. 1761 */ 1762 void 1763 fill_eproc(struct proc *p, struct eproc *ep) 1764 { 1765 struct tty *tp; 1766 struct lwp *l; 1767 1768 ep->e_paddr = p; 1769 ep->e_sess = p->p_session; 1770 ep->e_pcred = *p->p_cred; 1771 ep->e_ucred = *p->p_ucred; 1772 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1773 ep->e_vm.vm_rssize = 0; 1774 ep->e_vm.vm_tsize = 0; 1775 ep->e_vm.vm_dsize = 0; 1776 ep->e_vm.vm_ssize = 0; 1777 /* ep->e_vm.vm_pmap = XXX; */ 1778 } else { 1779 struct vmspace *vm = p->p_vmspace; 1780 1781 ep->e_vm.vm_rssize = vm_resident_count(vm); 1782 ep->e_vm.vm_tsize = vm->vm_tsize; 1783 ep->e_vm.vm_dsize = vm->vm_dsize; 1784 ep->e_vm.vm_ssize = vm->vm_ssize; 1785 1786 /* Pick a "representative" LWP */ 1787 l = proc_representative_lwp(p); 1788 1789 if (l->l_wmesg) 1790 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1791 } 1792 if (p->p_pptr) 1793 ep->e_ppid = p->p_pptr->p_pid; 1794 else 1795 ep->e_ppid = 0; 1796 ep->e_pgid = p->p_pgrp->pg_id; 1797 ep->e_sid = ep->e_sess->s_sid; 1798 ep->e_jobc = p->p_pgrp->pg_jobc; 1799 if ((p->p_flag & P_CONTROLT) && 1800 (tp = ep->e_sess->s_ttyp)) { 1801 ep->e_tdev = tp->t_dev; 1802 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1803 ep->e_tsess = tp->t_session; 1804 } else 1805 ep->e_tdev = NODEV; 1806 1807 ep->e_xsize = ep->e_xrssize = 0; 1808 ep->e_xccount = ep->e_xswrss = 0; 1809 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1810 if (SESS_LEADER(p)) 1811 ep->e_flag |= EPROC_SLEADER; 1812 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1813 } 1814 1815 /* 1816 * Fill in an eproc structure for the specified process. 1817 */ 1818 static void 1819 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1820 { 1821 struct tty *tp; 1822 struct lwp *l; 1823 struct timeval ut, st; 1824 1825 memset(ki, 0, sizeof(*ki)); 1826 1827 ki->p_paddr = PTRTOINT64(p); 1828 ki->p_fd = PTRTOINT64(p->p_fd); 1829 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1830 ki->p_stats = PTRTOINT64(p->p_stats); 1831 ki->p_limit = PTRTOINT64(p->p_limit); 1832 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1833 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1834 ki->p_sess = PTRTOINT64(p->p_session); 1835 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1836 ki->p_ru = PTRTOINT64(p->p_ru); 1837 1838 ki->p_eflag = 0; 1839 ki->p_exitsig = p->p_exitsig; 1840 ki->p_flag = p->p_flag; 1841 1842 ki->p_pid = p->p_pid; 1843 if (p->p_pptr) 1844 ki->p_ppid = p->p_pptr->p_pid; 1845 else 1846 ki->p_ppid = 0; 1847 ki->p_sid = p->p_session->s_sid; 1848 ki->p__pgid = p->p_pgrp->pg_id; 1849 1850 ki->p_tpgid = NO_PGID; /* may be changed if controlling tty below */ 1851 1852 ki->p_uid = p->p_ucred->cr_uid; 1853 ki->p_ruid = p->p_cred->p_ruid; 1854 ki->p_gid = p->p_ucred->cr_gid; 1855 ki->p_rgid = p->p_cred->p_rgid; 1856 ki->p_svuid = p->p_cred->p_svuid; 1857 ki->p_svgid = p->p_cred->p_svgid; 1858 1859 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1860 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1861 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1862 1863 ki->p_jobc = p->p_pgrp->pg_jobc; 1864 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1865 ki->p_tdev = tp->t_dev; 1866 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1867 ki->p_tsess = PTRTOINT64(tp->t_session); 1868 } else { 1869 ki->p_tdev = NODEV; 1870 } 1871 1872 ki->p_estcpu = p->p_estcpu; 1873 ki->p_rtime_sec = p->p_rtime.tv_sec; 1874 ki->p_rtime_usec = p->p_rtime.tv_usec; 1875 ki->p_cpticks = p->p_cpticks; 1876 ki->p_pctcpu = p->p_pctcpu; 1877 1878 ki->p_uticks = p->p_uticks; 1879 ki->p_sticks = p->p_sticks; 1880 ki->p_iticks = p->p_iticks; 1881 1882 ki->p_tracep = PTRTOINT64(p->p_tracep); 1883 ki->p_traceflag = p->p_traceflag; 1884 1885 1886 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1887 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1888 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1889 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1890 1891 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1892 ki->p_realstat = p->p_stat; 1893 ki->p_nice = p->p_nice; 1894 1895 ki->p_xstat = p->p_xstat; 1896 ki->p_acflag = p->p_acflag; 1897 1898 strncpy(ki->p_comm, p->p_comm, 1899 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1900 1901 strncpy(ki->p_login, p->p_session->s_login, 1902 min(sizeof ki->p_login - 1, sizeof p->p_session->s_login)); 1903 1904 ki->p_nlwps = p->p_nlwps; 1905 ki->p_nrlwps = p->p_nrlwps; 1906 ki->p_realflag = p->p_flag; 1907 1908 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1909 ki->p_vm_rssize = 0; 1910 ki->p_vm_tsize = 0; 1911 ki->p_vm_dsize = 0; 1912 ki->p_vm_ssize = 0; 1913 l = NULL; 1914 } else { 1915 struct vmspace *vm = p->p_vmspace; 1916 1917 ki->p_vm_rssize = vm_resident_count(vm); 1918 ki->p_vm_tsize = vm->vm_tsize; 1919 ki->p_vm_dsize = vm->vm_dsize; 1920 ki->p_vm_ssize = vm->vm_ssize; 1921 1922 /* Pick a "representative" LWP */ 1923 l = proc_representative_lwp(p); 1924 ki->p_forw = PTRTOINT64(l->l_forw); 1925 ki->p_back = PTRTOINT64(l->l_back); 1926 ki->p_addr = PTRTOINT64(l->l_addr); 1927 ki->p_stat = l->l_stat; 1928 ki->p_flag |= l->l_flag; 1929 ki->p_swtime = l->l_swtime; 1930 ki->p_slptime = l->l_slptime; 1931 if (l->l_stat == LSONPROC) { 1932 KDASSERT(l->l_cpu != NULL); 1933 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1934 } else 1935 ki->p_schedflags = 0; 1936 ki->p_holdcnt = l->l_holdcnt; 1937 ki->p_priority = l->l_priority; 1938 ki->p_usrpri = l->l_usrpri; 1939 if (l->l_wmesg) 1940 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1941 ki->p_wchan = PTRTOINT64(l->l_wchan); 1942 1943 } 1944 1945 if (p->p_session->s_ttyvp) 1946 ki->p_eflag |= EPROC_CTTY; 1947 if (SESS_LEADER(p)) 1948 ki->p_eflag |= EPROC_SLEADER; 1949 1950 /* XXX Is this double check necessary? */ 1951 if (P_ZOMBIE(p)) { 1952 ki->p_uvalid = 0; 1953 } else { 1954 ki->p_uvalid = 1; 1955 1956 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1957 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1958 1959 calcru(p, &ut, &st, 0); 1960 ki->p_uutime_sec = ut.tv_sec; 1961 ki->p_uutime_usec = ut.tv_usec; 1962 ki->p_ustime_sec = st.tv_sec; 1963 ki->p_ustime_usec = st.tv_usec; 1964 1965 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1966 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1967 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1968 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1969 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1970 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1971 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1972 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1973 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1974 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1975 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1976 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1977 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1978 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1979 1980 timeradd(&p->p_stats->p_cru.ru_utime, 1981 &p->p_stats->p_cru.ru_stime, &ut); 1982 ki->p_uctime_sec = ut.tv_sec; 1983 ki->p_uctime_usec = ut.tv_usec; 1984 } 1985 #ifdef MULTIPROCESSOR 1986 if (l && l->l_cpu != NULL) 1987 ki->p_cpuid = l->l_cpu->ci_cpuid; 1988 else 1989 #endif 1990 ki->p_cpuid = KI_NOCPU; 1991 1992 } 1993 1994 /* 1995 * Fill in a kinfo_lwp structure for the specified lwp. 1996 */ 1997 static void 1998 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1999 { 2000 2001 kl->l_forw = PTRTOINT64(l->l_forw); 2002 kl->l_back = PTRTOINT64(l->l_back); 2003 kl->l_laddr = PTRTOINT64(l); 2004 kl->l_addr = PTRTOINT64(l->l_addr); 2005 kl->l_stat = l->l_stat; 2006 kl->l_lid = l->l_lid; 2007 kl->l_flag = l->l_flag; 2008 2009 kl->l_swtime = l->l_swtime; 2010 kl->l_slptime = l->l_slptime; 2011 if (l->l_stat == LSONPROC) { 2012 KDASSERT(l->l_cpu != NULL); 2013 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 2014 } else 2015 kl->l_schedflags = 0; 2016 kl->l_holdcnt = l->l_holdcnt; 2017 kl->l_priority = l->l_priority; 2018 kl->l_usrpri = l->l_usrpri; 2019 if (l->l_wmesg) 2020 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 2021 kl->l_wchan = PTRTOINT64(l->l_wchan); 2022 #ifdef MULTIPROCESSOR 2023 if (l->l_cpu != NULL) 2024 kl->l_cpuid = l->l_cpu->ci_cpuid; 2025 else 2026 #endif 2027 kl->l_cpuid = KI_NOCPU; 2028 } 2029 2030 int 2031 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 2032 struct proc *up) 2033 { 2034 struct ps_strings pss; 2035 struct proc *p; 2036 size_t len, upper_bound, xlen, i; 2037 struct uio auio; 2038 struct iovec aiov; 2039 vaddr_t argv; 2040 pid_t pid; 2041 int nargv, type, error; 2042 char *arg; 2043 char *tmp; 2044 2045 if (namelen != 2) 2046 return (EINVAL); 2047 pid = name[0]; 2048 type = name[1]; 2049 2050 switch (type) { 2051 case KERN_PROC_ARGV: 2052 case KERN_PROC_NARGV: 2053 case KERN_PROC_ENV: 2054 case KERN_PROC_NENV: 2055 /* ok */ 2056 break; 2057 default: 2058 return (EINVAL); 2059 } 2060 2061 /* check pid */ 2062 if ((p = pfind(pid)) == NULL) 2063 return (EINVAL); 2064 2065 /* only root or same user change look at the environment */ 2066 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 2067 if (up->p_ucred->cr_uid != 0) { 2068 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 2069 up->p_cred->p_ruid != p->p_cred->p_svuid) 2070 return (EPERM); 2071 } 2072 } 2073 2074 if (sizep != NULL && where == NULL) { 2075 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 2076 *sizep = sizeof (int); 2077 else 2078 *sizep = ARG_MAX; /* XXX XXX XXX */ 2079 return (0); 2080 } 2081 if (where == NULL || sizep == NULL) 2082 return (EINVAL); 2083 2084 /* 2085 * Zombies don't have a stack, so we can't read their psstrings. 2086 * System processes also don't have a user stack. 2087 */ 2088 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 2089 return (EINVAL); 2090 2091 /* 2092 * Lock the process down in memory. 2093 */ 2094 /* XXXCDC: how should locking work here? */ 2095 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 2096 return (EFAULT); 2097 2098 p->p_vmspace->vm_refcnt++; /* XXX */ 2099 2100 /* 2101 * Allocate a temporary buffer to hold the arguments. 2102 */ 2103 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2104 2105 /* 2106 * Read in the ps_strings structure. 2107 */ 2108 aiov.iov_base = &pss; 2109 aiov.iov_len = sizeof(pss); 2110 auio.uio_iov = &aiov; 2111 auio.uio_iovcnt = 1; 2112 auio.uio_offset = (vaddr_t)p->p_psstr; 2113 auio.uio_resid = sizeof(pss); 2114 auio.uio_segflg = UIO_SYSSPACE; 2115 auio.uio_rw = UIO_READ; 2116 auio.uio_procp = NULL; 2117 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2118 if (error) 2119 goto done; 2120 2121 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2122 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2123 else 2124 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2125 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2126 error = copyout(&nargv, where, sizeof(nargv)); 2127 *sizep = sizeof(nargv); 2128 goto done; 2129 } 2130 /* 2131 * Now read the address of the argument vector. 2132 */ 2133 switch (type) { 2134 case KERN_PROC_ARGV: 2135 /* XXX compat32 stuff here */ 2136 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2137 break; 2138 case KERN_PROC_ENV: 2139 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2140 break; 2141 default: 2142 return (EINVAL); 2143 } 2144 auio.uio_offset = (off_t)(long)tmp; 2145 aiov.iov_base = &argv; 2146 aiov.iov_len = sizeof(argv); 2147 auio.uio_iov = &aiov; 2148 auio.uio_iovcnt = 1; 2149 auio.uio_resid = sizeof(argv); 2150 auio.uio_segflg = UIO_SYSSPACE; 2151 auio.uio_rw = UIO_READ; 2152 auio.uio_procp = NULL; 2153 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2154 if (error) 2155 goto done; 2156 2157 /* 2158 * Now copy in the actual argument vector, one page at a time, 2159 * since we don't know how long the vector is (though, we do 2160 * know how many NUL-terminated strings are in the vector). 2161 */ 2162 len = 0; 2163 upper_bound = *sizep; 2164 for (; nargv != 0 && len < upper_bound; len += xlen) { 2165 aiov.iov_base = arg; 2166 aiov.iov_len = PAGE_SIZE; 2167 auio.uio_iov = &aiov; 2168 auio.uio_iovcnt = 1; 2169 auio.uio_offset = argv + len; 2170 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2171 auio.uio_resid = xlen; 2172 auio.uio_segflg = UIO_SYSSPACE; 2173 auio.uio_rw = UIO_READ; 2174 auio.uio_procp = NULL; 2175 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2176 if (error) 2177 goto done; 2178 2179 for (i = 0; i < xlen && nargv != 0; i++) { 2180 if (arg[i] == '\0') 2181 nargv--; /* one full string */ 2182 } 2183 2184 /* 2185 * Make sure we don't copyout past the end of the user's 2186 * buffer. 2187 */ 2188 if (len + i > upper_bound) 2189 i = upper_bound - len; 2190 2191 error = copyout(arg, (char *)where + len, i); 2192 if (error) 2193 break; 2194 2195 if (nargv == 0) { 2196 len += i; 2197 break; 2198 } 2199 } 2200 *sizep = len; 2201 2202 done: 2203 uvmspace_free(p->p_vmspace); 2204 2205 free(arg, M_TEMP); 2206 return (error); 2207 } 2208 2209 #if NPTY > 0 2210 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2211 2212 /* 2213 * Validate parameters and get old / set new parameters 2214 * for pty sysctl function. 2215 */ 2216 static int 2217 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2218 { 2219 int error = 0; 2220 int oldmax = 0, newmax = 0; 2221 2222 /* get current value of maxptys */ 2223 oldmax = pty_maxptys(0, 0); 2224 2225 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2226 2227 if (!error && newp) { 2228 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2229 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2230 2231 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2232 return (EINVAL); 2233 2234 } 2235 2236 return (error); 2237 } 2238 #endif /* NPTY > 0 */ 2239 2240 static int 2241 sysctl_dotkstat(int *name, u_int namelen, void *where, size_t *sizep, 2242 void *newp) 2243 { 2244 2245 /* all sysctl names at this level are terminal */ 2246 if (namelen != 1) 2247 return (ENOTDIR); /* overloaded */ 2248 2249 switch (name[0]) { 2250 case KERN_TKSTAT_NIN: 2251 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2252 case KERN_TKSTAT_NOUT: 2253 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2254 case KERN_TKSTAT_CANCC: 2255 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2256 case KERN_TKSTAT_RAWCC: 2257 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2258 default: 2259 return (EOPNOTSUPP); 2260 } 2261 } 2262
Indexes created Tue Sep 23 14:10:03 GMT 2025