kern_sysctl.c revision 1.139
1 /* $NetBSD: kern_sysctl.c,v 1.139 2003/07/30 12:09:46 yamt 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 1.139 2003/07/30 12:09:46 yamt Exp $"); 47 48 #include "opt_ddb.h" 49 #include "opt_insecure.h" 50 #include "opt_defcorename.h" 51 #include "opt_multiprocessor.h" 52 #include "opt_pipe.h" 53 #include "opt_sysv.h" 54 #include "pty.h" 55 #include "rnd.h" 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/kernel.h> 60 #include <sys/buf.h> 61 #include <sys/device.h> 62 #include <sys/disklabel.h> 63 #include <sys/dkstat.h> 64 #include <sys/exec.h> 65 #include <sys/file.h> 66 #include <sys/ioctl.h> 67 #include <sys/malloc.h> 68 #include <sys/mount.h> 69 #include <sys/msgbuf.h> 70 #include <sys/pool.h> 71 #include <sys/proc.h> 72 #include <sys/resource.h> 73 #include <sys/resourcevar.h> 74 #include <sys/sa.h> 75 #include <sys/syscallargs.h> 76 #include <sys/tty.h> 77 #include <sys/unistd.h> 78 #include <sys/vnode.h> 79 #include <sys/socketvar.h> 80 #define __SYSCTL_PRIVATE 81 #include <sys/sysctl.h> 82 #include <sys/lock.h> 83 #include <sys/namei.h> 84 85 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 86 #include <sys/ipc.h> 87 #endif 88 #ifdef SYSVMSG 89 #include <sys/msg.h> 90 #endif 91 #ifdef SYSVSEM 92 #include <sys/sem.h> 93 #endif 94 #ifdef SYSVSHM 95 #include <sys/shm.h> 96 #endif 97 98 #include <dev/cons.h> 99 100 #if defined(DDB) 101 #include <ddb/ddbvar.h> 102 #endif 103 104 #ifndef PIPE_SOCKETPAIR 105 #include <sys/pipe.h> 106 #endif 107 108 #if NRND > 0 109 #include <sys/rnd.h> 110 #endif 111 112 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 113 114 static int sysctl_file(void *, size_t *); 115 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 116 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 117 #endif 118 static int sysctl_msgbuf(void *, size_t *); 119 static int sysctl_doeproc(int *, u_int, void *, size_t *); 120 static int sysctl_dolwp(int *, u_int, void *, size_t *); 121 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 122 #ifdef MULTIPROCESSOR 123 static int sysctl_docptime(void *, size_t *, void *); 124 static int sysctl_ncpus(void); 125 #endif 126 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 127 static void fill_lwp(struct lwp *, struct kinfo_lwp *); 128 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 129 #if NPTY > 0 130 static int sysctl_pty(void *, size_t *, void *, size_t); 131 #endif 132 133 /* 134 * The `sysctl_memlock' is intended to keep too many processes from 135 * locking down memory by doing sysctls at once. Whether or not this 136 * is really a good idea to worry about it probably a subject of some 137 * debate. 138 */ 139 struct lock sysctl_memlock; 140 141 void 142 sysctl_init(void) 143 { 144 145 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 146 } 147 148 int 149 sys___sysctl(struct lwp *l, void *v, register_t *retval) 150 { 151 struct sys___sysctl_args /* { 152 syscallarg(int *) name; 153 syscallarg(u_int) namelen; 154 syscallarg(void *) old; 155 syscallarg(size_t *) oldlenp; 156 syscallarg(void *) new; 157 syscallarg(size_t) newlen; 158 } */ *uap = v; 159 struct proc *p = l->l_proc; 160 int error; 161 size_t savelen = 0, oldlen = 0; 162 sysctlfn *fn; 163 int name[CTL_MAXNAME]; 164 size_t *oldlenp; 165 166 /* 167 * all top-level sysctl names are non-terminal 168 */ 169 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 170 return (EINVAL); 171 error = copyin(SCARG(uap, name), &name, 172 SCARG(uap, namelen) * sizeof(int)); 173 if (error) 174 return (error); 175 176 /* 177 * For all but CTL_PROC, must be root to change a value. 178 * For CTL_PROC, must be root, or owner of the proc (and not suid), 179 * this is checked in proc_sysctl() (once we know the targer proc). 180 */ 181 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 182 (error = suser(p->p_ucred, &p->p_acflag))) 183 return (error); 184 185 switch (name[0]) { 186 case CTL_KERN: 187 fn = kern_sysctl; 188 break; 189 case CTL_HW: 190 fn = hw_sysctl; 191 break; 192 case CTL_VM: 193 fn = uvm_sysctl; 194 break; 195 case CTL_NET: 196 fn = net_sysctl; 197 break; 198 case CTL_VFS: 199 fn = vfs_sysctl; 200 break; 201 case CTL_MACHDEP: 202 fn = cpu_sysctl; 203 break; 204 #ifdef DEBUG 205 case CTL_DEBUG: 206 fn = debug_sysctl; 207 break; 208 #endif 209 #ifdef DDB 210 case CTL_DDB: 211 fn = ddb_sysctl; 212 break; 213 #endif 214 case CTL_PROC: 215 fn = proc_sysctl; 216 break; 217 218 case CTL_EMUL: 219 fn = emul_sysctl; 220 break; 221 default: 222 return (EOPNOTSUPP); 223 } 224 225 /* 226 * XXX Hey, we wire `old', but what about `new'? 227 */ 228 229 oldlenp = SCARG(uap, oldlenp); 230 if (oldlenp) { 231 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 232 return (error); 233 oldlenp = &oldlen; 234 } 235 if (SCARG(uap, old) != NULL) { 236 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 237 if (error) 238 return (error); 239 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 240 if (error) { 241 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 242 return (error); 243 } 244 savelen = oldlen; 245 } 246 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 247 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 248 if (SCARG(uap, old) != NULL) { 249 uvm_vsunlock(p, SCARG(uap, old), savelen); 250 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 251 } 252 if (error) 253 return (error); 254 if (SCARG(uap, oldlenp)) 255 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 256 return (error); 257 } 258 259 /* 260 * Attributes stored in the kernel. 261 */ 262 char hostname[MAXHOSTNAMELEN]; 263 int hostnamelen; 264 265 char domainname[MAXHOSTNAMELEN]; 266 int domainnamelen; 267 268 long hostid; 269 270 #ifdef INSECURE 271 int securelevel = -1; 272 #else 273 int securelevel = 0; 274 #endif 275 276 #ifndef DEFCORENAME 277 #define DEFCORENAME "%n.core" 278 #endif 279 char defcorename[MAXPATHLEN] = DEFCORENAME; 280 int defcorenamelen = sizeof(DEFCORENAME); 281 282 extern int kern_logsigexit; 283 extern fixpt_t ccpu; 284 extern int forkfsleep; 285 extern int dumponpanic; 286 287 #ifndef MULTIPROCESSOR 288 #define sysctl_ncpus() 1 289 #endif 290 291 #ifdef MULTIPROCESSOR 292 293 #ifndef CPU_INFO_FOREACH 294 #define CPU_INFO_ITERATOR int 295 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 296 #endif 297 298 static int 299 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 300 { 301 u_int64_t cp_time[CPUSTATES]; 302 int i; 303 struct cpu_info *ci; 304 CPU_INFO_ITERATOR cii; 305 306 for (i = 0; i < CPUSTATES; i++) 307 cp_time[i] = 0; 308 309 for (CPU_INFO_FOREACH(cii, ci)) { 310 for (i = 0; i < CPUSTATES; i++) 311 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 312 } 313 return (sysctl_rdstruct(oldp, oldlenp, newp, 314 cp_time, sizeof(cp_time))); 315 } 316 317 static int 318 sysctl_ncpus(void) 319 { 320 struct cpu_info *ci; 321 CPU_INFO_ITERATOR cii; 322 323 int ncpus = 0; 324 for (CPU_INFO_FOREACH(cii, ci)) 325 ncpus++; 326 return (ncpus); 327 } 328 329 #endif 330 331 /* 332 * kernel related system variables. 333 */ 334 int 335 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 336 void *newp, size_t newlen, struct proc *p) 337 { 338 int error, level, inthostid; 339 int old_autonicetime; 340 int old_vnodes; 341 dev_t consdev; 342 #if NRND > 0 343 int v; 344 #endif 345 346 /* All sysctl names at this level, except for a few, are terminal. */ 347 switch (name[0]) { 348 case KERN_PROC: 349 case KERN_PROC2: 350 case KERN_LWP: 351 case KERN_PROF: 352 case KERN_MBUF: 353 case KERN_PROC_ARGS: 354 case KERN_SYSVIPC_INFO: 355 case KERN_PIPE: 356 case KERN_TKSTAT: 357 /* Not terminal. */ 358 break; 359 default: 360 if (namelen != 1) 361 return (ENOTDIR); /* overloaded */ 362 } 363 364 switch (name[0]) { 365 case KERN_OSTYPE: 366 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 367 case KERN_OSRELEASE: 368 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 369 case KERN_OSREV: 370 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 371 case KERN_VERSION: 372 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 373 case KERN_MAXVNODES: 374 old_vnodes = desiredvnodes; 375 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 376 if (newp && !error) { 377 if (old_vnodes > desiredvnodes) { 378 error = vfs_drainvnodes(desiredvnodes, p); 379 if (error) { 380 desiredvnodes = old_vnodes; 381 return error; 382 } 383 } 384 vfs_reinit(); 385 nchreinit(); 386 } 387 return (error); 388 case KERN_MAXPROC: 389 { 390 int nmaxproc = maxproc; 391 392 error = sysctl_int(oldp, oldlenp, newp, newlen, &nmaxproc); 393 394 if (!error && newp) { 395 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 396 return (EINVAL); 397 398 #ifdef __HAVE_CPU_MAXPROC 399 if (nmaxproc > cpu_maxproc()) 400 return (EINVAL); 401 #endif 402 maxproc = nmaxproc; 403 } 404 405 return (error); 406 } 407 case KERN_MAXFILES: 408 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 409 case KERN_ARGMAX: 410 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 411 case KERN_SECURELVL: 412 level = securelevel; 413 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 414 newp == NULL) 415 return (error); 416 if (level < securelevel && p->p_pid != 1) 417 return (EPERM); 418 securelevel = level; 419 return (0); 420 case KERN_HOSTNAME: 421 error = sysctl_string(oldp, oldlenp, newp, newlen, 422 hostname, sizeof(hostname)); 423 if (newp && !error) 424 hostnamelen = newlen; 425 return (error); 426 case KERN_DOMAINNAME: 427 error = sysctl_string(oldp, oldlenp, newp, newlen, 428 domainname, sizeof(domainname)); 429 if (newp && !error) 430 domainnamelen = newlen; 431 return (error); 432 case KERN_HOSTID: 433 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 434 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 435 if (newp && !error) 436 hostid = inthostid; 437 return (error); 438 case KERN_CLOCKRATE: 439 return (sysctl_clockrate(oldp, oldlenp)); 440 case KERN_BOOTTIME: 441 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 442 sizeof(struct timeval))); 443 case KERN_VNODE: 444 return (sysctl_vnode(oldp, oldlenp, p)); 445 case KERN_PROC: 446 case KERN_PROC2: 447 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 448 case KERN_LWP: 449 return (sysctl_dolwp(name, namelen, oldp, oldlenp)); 450 case KERN_PROC_ARGS: 451 return (sysctl_procargs(name + 1, namelen - 1, 452 oldp, oldlenp, p)); 453 case KERN_FILE: 454 return (sysctl_file(oldp, oldlenp)); 455 #ifdef GPROF 456 case KERN_PROF: 457 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 458 newp, newlen)); 459 #endif 460 case KERN_POSIX1: 461 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 462 case KERN_NGROUPS: 463 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 464 case KERN_JOB_CONTROL: 465 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 466 case KERN_SAVED_IDS: 467 #ifdef _POSIX_SAVED_IDS 468 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 469 #else 470 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 471 #endif 472 case KERN_MAXPARTITIONS: 473 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 474 case KERN_RAWPARTITION: 475 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 476 #ifdef NTP 477 case KERN_NTPTIME: 478 return (sysctl_ntptime(oldp, oldlenp)); 479 #endif 480 case KERN_AUTONICETIME: 481 old_autonicetime = autonicetime; 482 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 483 if (autonicetime < 0) 484 autonicetime = old_autonicetime; 485 return (error); 486 case KERN_AUTONICEVAL: 487 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 488 if (autoniceval < PRIO_MIN) 489 autoniceval = PRIO_MIN; 490 if (autoniceval > PRIO_MAX) 491 autoniceval = PRIO_MAX; 492 return (error); 493 case KERN_RTC_OFFSET: 494 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 495 case KERN_ROOT_DEVICE: 496 return (sysctl_rdstring(oldp, oldlenp, newp, 497 root_device->dv_xname)); 498 case KERN_MSGBUFSIZE: 499 /* 500 * deal with cases where the message buffer has 501 * become corrupted. 502 */ 503 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 504 msgbufenabled = 0; 505 return (ENXIO); 506 } 507 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 508 case KERN_FSYNC: 509 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 510 case KERN_SYSVMSG: 511 #ifdef SYSVMSG 512 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 513 #else 514 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 515 #endif 516 case KERN_SYSVSEM: 517 #ifdef SYSVSEM 518 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 519 #else 520 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 521 #endif 522 case KERN_SYSVSHM: 523 #ifdef SYSVSHM 524 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 525 #else 526 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 527 #endif 528 case KERN_DEFCORENAME: 529 if (newp && newlen < 1) 530 return (EINVAL); 531 error = sysctl_string(oldp, oldlenp, newp, newlen, 532 defcorename, sizeof(defcorename)); 533 if (newp && !error) 534 defcorenamelen = newlen; 535 return (error); 536 case KERN_SYNCHRONIZED_IO: 537 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 538 case KERN_IOV_MAX: 539 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 540 case KERN_MBUF: 541 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 542 newp, newlen)); 543 case KERN_MAPPED_FILES: 544 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 545 case KERN_MEMLOCK: 546 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 547 case KERN_MEMLOCK_RANGE: 548 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 549 case KERN_MEMORY_PROTECTION: 550 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 551 case KERN_LOGIN_NAME_MAX: 552 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 553 case KERN_LOGSIGEXIT: 554 return (sysctl_int(oldp, oldlenp, newp, newlen, 555 &kern_logsigexit)); 556 case KERN_FSCALE: 557 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 558 case KERN_CCPU: 559 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 560 case KERN_CP_TIME: 561 #ifndef MULTIPROCESSOR 562 return (sysctl_rdstruct(oldp, oldlenp, newp, 563 curcpu()->ci_schedstate.spc_cp_time, 564 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 565 #else 566 return (sysctl_docptime(oldp, oldlenp, newp)); 567 #endif 568 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 569 case KERN_SYSVIPC_INFO: 570 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 571 #endif 572 case KERN_MSGBUF: 573 return (sysctl_msgbuf(oldp, oldlenp)); 574 case KERN_CONSDEV: 575 if (cn_tab != NULL) 576 consdev = cn_tab->cn_dev; 577 else 578 consdev = NODEV; 579 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 580 sizeof consdev)); 581 #if NPTY > 0 582 case KERN_MAXPTYS: 583 return (sysctl_pty(oldp, oldlenp, newp, newlen)); 584 #endif 585 #ifndef PIPE_SOCKETPAIR 586 case KERN_PIPE: 587 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 588 newp, newlen)); 589 #endif 590 case KERN_MAXPHYS: 591 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 592 case KERN_SOMAXKVA: 593 { 594 int new_somaxkva = somaxkva; 595 596 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_somaxkva); 597 if (newp && !error) { 598 if (new_somaxkva < (16 * 1024 * 1024)) /* sanity */ 599 return (EINVAL); 600 somaxkva = new_somaxkva; 601 } 602 return (error); 603 } 604 case KERN_SBMAX: 605 { 606 int new_sbmax = sb_max; 607 608 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 609 if (newp && !error) { 610 if (new_sbmax < (16 * 1024)) /* sanity */ 611 return (EINVAL); 612 sb_max = new_sbmax; 613 } 614 return (error); 615 } 616 case KERN_TKSTAT: 617 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 618 newp)); 619 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 620 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 621 case KERN_URND: 622 #if NRND > 0 623 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 624 sizeof(v)) 625 return (sysctl_rdint(oldp, oldlenp, newp, v)); 626 else 627 return (EIO); /*XXX*/ 628 #else 629 return (EOPNOTSUPP); 630 #endif 631 case KERN_LABELSECTOR: 632 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 633 case KERN_LABELOFFSET: 634 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 635 case KERN_FORKFSLEEP: 636 { 637 /* userland sees value in ms, internally is in ticks */ 638 int timo, lsleep = forkfsleep * 1000 / hz; 639 640 error = sysctl_int(oldp, oldlenp, newp, newlen, &lsleep); 641 if (newp && !error) { 642 /* refuse negative values, and overly 'long time' */ 643 if (lsleep < 0 || lsleep > MAXSLP * 1000) 644 return (EINVAL); 645 646 timo = mstohz(lsleep); 647 648 /* if the interval is >0 ms && <1 tick, use 1 tick */ 649 if (lsleep != 0 && timo == 0) 650 forkfsleep = 1; 651 else 652 forkfsleep = timo; 653 } 654 return (error); 655 } 656 case KERN_POSIX_THREADS: /* XXX _POSIX_VERSION */ 657 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 658 case KERN_POSIX_SEMAPHORES: /* XXX _POSIX_VERSION */ 659 #ifdef P1003_1B_SEMAPHORE 660 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 661 #else 662 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 663 #endif 664 case KERN_POSIX_BARRIERS: /* XXX _POSIX_VERSION */ 665 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 666 case KERN_POSIX_TIMERS: /* XXX _POSIX_VERSION */ 667 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 668 case KERN_POSIX_SPIN_LOCKS: /* XXX _POSIX_VERSION */ 669 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 670 case KERN_POSIX_READER_WRITER_LOCKS: /* XXX _POSIX_VERSION */ 671 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 672 case KERN_DUMP_ON_PANIC: 673 return (sysctl_int(oldp, oldlenp, newp, newlen, &dumponpanic)); 674 675 default: 676 return (EOPNOTSUPP); 677 } 678 /* NOTREACHED */ 679 } 680 681 /* 682 * hardware related system variables. 683 */ 684 int 685 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 686 void *newp, size_t newlen, struct proc *p) 687 { 688 689 /* All sysctl names at this level, except for a few, are terminal. */ 690 switch (name[0]) { 691 case HW_DISKSTATS: 692 /* Not terminal. */ 693 break; 694 default: 695 if (namelen != 1) 696 return (ENOTDIR); /* overloaded */ 697 } 698 699 switch (name[0]) { 700 case HW_MACHINE: 701 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 702 case HW_MACHINE_ARCH: 703 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 704 case HW_MODEL: 705 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 706 case HW_NCPU: 707 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 708 case HW_BYTEORDER: 709 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 710 case HW_PHYSMEM: 711 { 712 u_int rval; 713 714 if ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) 715 rval = UINT_MAX; 716 else 717 rval = physmem * PAGE_SIZE; 718 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 719 } 720 case HW_PHYSMEM64: 721 return (sysctl_rdquad(oldp, oldlenp, newp, 722 (u_quad_t)physmem * PAGE_SIZE)); 723 case HW_USERMEM: 724 { 725 u_int rval; 726 727 if ((u_int)(physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 728 rval = UINT_MAX; 729 else 730 rval = (physmem - uvmexp.wired) * PAGE_SIZE; 731 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 732 } 733 case HW_USERMEM64: 734 return (sysctl_rdquad(oldp, oldlenp, newp, 735 (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE)); 736 case HW_PAGESIZE: 737 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 738 case HW_ALIGNBYTES: 739 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 740 case HW_DISKNAMES: 741 return (sysctl_disknames(oldp, oldlenp)); 742 case HW_DISKSTATS: 743 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 744 case HW_CNMAGIC: { 745 char magic[CNS_LEN]; 746 int error; 747 748 if (oldp) 749 cn_get_magic(magic, CNS_LEN); 750 error = sysctl_string(oldp, oldlenp, newp, newlen, 751 magic, sizeof(magic)); 752 if (newp && !error) { 753 error = cn_set_magic(magic); 754 } 755 return (error); 756 } 757 default: 758 return (EOPNOTSUPP); 759 } 760 /* NOTREACHED */ 761 } 762 763 #ifdef DEBUG 764 /* 765 * Debugging related system variables. 766 */ 767 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 768 struct ctldebug debug5, debug6, debug7, debug8, debug9; 769 struct ctldebug debug10, debug11, debug12, debug13, debug14; 770 struct ctldebug debug15, debug16, debug17, debug18, debug19; 771 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 772 &debug0, &debug1, &debug2, &debug3, &debug4, 773 &debug5, &debug6, &debug7, &debug8, &debug9, 774 &debug10, &debug11, &debug12, &debug13, &debug14, 775 &debug15, &debug16, &debug17, &debug18, &debug19, 776 }; 777 778 int 779 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 780 void *newp, size_t newlen, struct proc *p) 781 { 782 struct ctldebug *cdp; 783 784 /* all sysctl names at this level are name and field */ 785 if (namelen != 2) 786 return (ENOTDIR); /* overloaded */ 787 if (name[0] >= CTL_DEBUG_MAXID) 788 return (EOPNOTSUPP); 789 cdp = debugvars[name[0]]; 790 if (cdp->debugname == 0) 791 return (EOPNOTSUPP); 792 switch (name[1]) { 793 case CTL_DEBUG_NAME: 794 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 795 case CTL_DEBUG_VALUE: 796 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 797 default: 798 return (EOPNOTSUPP); 799 } 800 /* NOTREACHED */ 801 } 802 #endif /* DEBUG */ 803 804 int 805 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 806 void *newp, size_t newlen, struct proc *p) 807 { 808 struct proc *ptmp = NULL; 809 const struct proclist_desc *pd; 810 int error = 0; 811 struct rlimit alim; 812 struct plimit *newplim; 813 char *tmps = NULL; 814 size_t len, curlen; 815 u_int i; 816 817 if (namelen < 2) 818 return (EINVAL); 819 820 if (name[0] == PROC_CURPROC) { 821 ptmp = p; 822 } else { 823 proclist_lock_read(); 824 for (pd = proclists; pd->pd_list != NULL; pd++) { 825 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 826 ptmp = LIST_NEXT(ptmp, p_list)) { 827 /* Skip embryonic processes. */ 828 if (ptmp->p_stat == SIDL) 829 continue; 830 if (ptmp->p_pid == (pid_t)name[0]) 831 break; 832 } 833 if (ptmp != NULL) 834 break; 835 } 836 proclist_unlock_read(); 837 if (ptmp == NULL) 838 return (ESRCH); 839 if (p->p_ucred->cr_uid != 0) { 840 if (p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 841 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 842 return (EPERM); 843 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 844 return (EPERM); /* sgid proc */ 845 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 846 if (p->p_ucred->cr_groups[i] == 847 ptmp->p_cred->p_rgid) 848 break; 849 } 850 if (i == p->p_ucred->cr_ngroups) 851 return (EPERM); 852 } 853 } 854 switch (name[1]) { 855 case PROC_PID_STOPFORK: 856 if (namelen != 2) 857 return (EINVAL); 858 i = ((ptmp->p_flag & P_STOPFORK) != 0); 859 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 860 return (error); 861 if (i != 0) 862 ptmp->p_flag |= P_STOPFORK; 863 else 864 ptmp->p_flag &= ~P_STOPFORK; 865 return (0); 866 break; 867 868 case PROC_PID_STOPEXEC: 869 if (namelen != 2) 870 return (EINVAL); 871 i = ((ptmp->p_flag & P_STOPEXEC) != 0); 872 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 873 return (error); 874 if (i != 0) 875 ptmp->p_flag |= P_STOPEXEC; 876 else 877 ptmp->p_flag &= ~P_STOPEXEC; 878 return (0); 879 break; 880 881 case PROC_PID_CORENAME: 882 if (namelen != 2) 883 return (EINVAL); 884 /* 885 * Can't use sysctl_string() here because we may malloc a new 886 * area during the process, so we have to do it by hand. 887 */ 888 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 889 if (oldlenp && *oldlenp < curlen) { 890 if (!oldp) 891 *oldlenp = curlen; 892 return (ENOMEM); 893 } 894 if (newp) { 895 if (securelevel > 2) 896 return (EPERM); 897 if (newlen > MAXPATHLEN) 898 return (ENAMETOOLONG); 899 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 900 if (tmps == NULL) 901 return (ENOMEM); 902 error = copyin(newp, tmps, newlen + 1); 903 tmps[newlen] = '\0'; 904 if (error) 905 goto cleanup; 906 /* Enforce to be either 'core' for end with '.core' */ 907 if (newlen < 4) { /* c.o.r.e */ 908 error = EINVAL; 909 goto cleanup; 910 } 911 len = newlen - 4; 912 if (len > 0) { 913 if (tmps[len - 1] != '.' && 914 tmps[len - 1] != '/') { 915 error = EINVAL; 916 goto cleanup; 917 } 918 } 919 if (strcmp(&tmps[len], "core") != 0) { 920 error = EINVAL; 921 goto cleanup; 922 } 923 } 924 if (oldp && oldlenp) { 925 *oldlenp = curlen; 926 error = copyout(ptmp->p_limit->pl_corename, oldp, 927 curlen); 928 } 929 if (newp && error == 0) { 930 /* if the 2 strings are identical, don't limcopy() */ 931 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 932 error = 0; 933 goto cleanup; 934 } 935 if (ptmp->p_limit->p_refcnt > 1 && 936 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 937 newplim = limcopy(ptmp->p_limit); 938 limfree(ptmp->p_limit); 939 ptmp->p_limit = newplim; 940 } 941 if (ptmp->p_limit->pl_corename != defcorename) { 942 free(ptmp->p_limit->pl_corename, M_TEMP); 943 } 944 ptmp->p_limit->pl_corename = tmps; 945 return (0); 946 } 947 cleanup: 948 if (tmps) 949 free(tmps, M_TEMP); 950 return (error); 951 break; 952 953 case PROC_PID_LIMIT: 954 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 955 return (EINVAL); 956 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 957 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 958 error = sysctl_quad(oldp, oldlenp, newp, newlen, 959 &alim.rlim_max); 960 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 961 error = sysctl_quad(oldp, oldlenp, newp, newlen, 962 &alim.rlim_cur); 963 else 964 error = (EINVAL); 965 966 if (error) 967 return (error); 968 969 if (newp) 970 error = dosetrlimit(ptmp, p->p_cred, 971 name[2] - 1, &alim); 972 return (error); 973 break; 974 975 default: 976 return (EINVAL); 977 break; 978 } 979 /* NOTREACHED */ 980 return (EINVAL); 981 } 982 983 int 984 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 985 void *newp, size_t newlen, struct proc *p) 986 { 987 static struct { 988 const char *name; 989 int type; 990 } emulations[] = CTL_EMUL_NAMES; 991 const struct emul *e; 992 const char *ename; 993 #ifdef LKM 994 extern struct lock exec_lock; /* XXX */ 995 int error; 996 #else 997 extern int nexecs_builtin; 998 extern const struct execsw execsw_builtin[]; 999 int i; 1000 #endif 1001 1002 /* all sysctl names at this level are name and field */ 1003 if (namelen < 2) 1004 return (ENOTDIR); /* overloaded */ 1005 1006 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 1007 return (EOPNOTSUPP); 1008 1009 ename = emulations[name[0]].name; 1010 1011 #ifdef LKM 1012 lockmgr(&exec_lock, LK_SHARED, NULL); 1013 if ((e = emul_search(ename))) { 1014 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1015 newp, newlen, p); 1016 } else 1017 error = EOPNOTSUPP; 1018 lockmgr(&exec_lock, LK_RELEASE, NULL); 1019 1020 return (error); 1021 #else 1022 for (i = 0; i < nexecs_builtin; i++) { 1023 e = execsw_builtin[i].es_emul; 1024 /* 1025 * In order to match e.g. e->e_name "irix o32" 1026 * with ename "irix", we limit the comparison 1027 * to the length of ename. 1028 */ 1029 if (e == NULL || 1030 strncmp(ename, e->e_name, strlen(ename)) != 0 || 1031 e->e_sysctl == NULL) 1032 continue; 1033 1034 return ((*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1035 newp, newlen, p)); 1036 } 1037 1038 return (EOPNOTSUPP); 1039 #endif 1040 } 1041 /* 1042 * Convenience macros. 1043 */ 1044 1045 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 1046 if (oldlenp) { \ 1047 if (!oldp) \ 1048 *oldlenp = len; \ 1049 else { \ 1050 if (*oldlenp < len) \ 1051 return (ENOMEM); \ 1052 *oldlenp = len; \ 1053 error = copyout((caddr_t)valp, oldp, len); \ 1054 } \ 1055 } 1056 1057 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 1058 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 1059 1060 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 1061 if (newp && newlen != len) \ 1062 return (EINVAL); 1063 1064 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1065 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1066 1067 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1068 if (error == 0 && newp) \ 1069 error = copyin(newp, valp, len); 1070 1071 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1072 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1073 1074 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1075 if (oldlenp) { \ 1076 len = strlen(str) + 1; \ 1077 if (!oldp) \ 1078 *oldlenp = len; \ 1079 else { \ 1080 if (*oldlenp < len) { \ 1081 err2 = ENOMEM; \ 1082 len = *oldlenp; \ 1083 } else \ 1084 *oldlenp = len; \ 1085 error = copyout(str, oldp, len);\ 1086 if (error == 0) \ 1087 error = err2; \ 1088 } \ 1089 } 1090 1091 /* 1092 * Validate parameters and get old / set new parameters 1093 * for an integer-valued sysctl function. 1094 */ 1095 int 1096 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1097 { 1098 int error = 0; 1099 1100 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1101 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1102 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1103 1104 return (error); 1105 } 1106 1107 1108 /* 1109 * As above, but read-only. 1110 */ 1111 int 1112 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1113 { 1114 int error = 0; 1115 1116 if (newp) 1117 return (EPERM); 1118 1119 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1120 1121 return (error); 1122 } 1123 1124 /* 1125 * Validate parameters and get old / set new parameters 1126 * for an quad-valued sysctl function. 1127 */ 1128 int 1129 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1130 quad_t *valp) 1131 { 1132 int error = 0; 1133 1134 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1135 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1136 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1137 1138 return (error); 1139 } 1140 1141 /* 1142 * As above, but read-only. 1143 */ 1144 int 1145 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1146 { 1147 int error = 0; 1148 1149 if (newp) 1150 return (EPERM); 1151 1152 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1153 1154 return (error); 1155 } 1156 1157 /* 1158 * Validate parameters and get old / set new parameters 1159 * for a string-valued sysctl function. 1160 */ 1161 int 1162 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1163 size_t maxlen) 1164 { 1165 int error = 0, err2 = 0; 1166 size_t len; 1167 1168 if (newp && newlen >= maxlen) 1169 return (EINVAL); 1170 1171 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1172 1173 if (error == 0 && newp) { 1174 error = copyin(newp, str, newlen); 1175 str[newlen] = 0; 1176 } 1177 return (error); 1178 } 1179 1180 /* 1181 * As above, but read-only. 1182 */ 1183 int 1184 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1185 { 1186 int error = 0, err2 = 0; 1187 size_t len; 1188 1189 if (newp) 1190 return (EPERM); 1191 1192 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1193 1194 return (error); 1195 } 1196 1197 /* 1198 * Validate parameters and get old / set new parameters 1199 * for a structure oriented sysctl function. 1200 */ 1201 int 1202 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1203 size_t len) 1204 { 1205 int error = 0; 1206 1207 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1208 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1209 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1210 1211 return (error); 1212 } 1213 1214 /* 1215 * Validate parameters and get old parameters 1216 * for a structure oriented sysctl function. 1217 */ 1218 int 1219 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1220 size_t len) 1221 { 1222 int error = 0; 1223 1224 if (newp) 1225 return (EPERM); 1226 1227 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1228 1229 return (error); 1230 } 1231 1232 /* 1233 * As above, but can return a truncated result. 1234 */ 1235 int 1236 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1237 size_t len) 1238 { 1239 int error = 0; 1240 1241 if (newp) 1242 return (EPERM); 1243 1244 len = min(*oldlenp, len); 1245 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1246 1247 return (error); 1248 } 1249 1250 /* 1251 * Get file structures. 1252 */ 1253 static int 1254 sysctl_file(void *vwhere, size_t *sizep) 1255 { 1256 int error; 1257 size_t buflen; 1258 struct file *fp; 1259 char *start, *where; 1260 1261 start = where = vwhere; 1262 buflen = *sizep; 1263 if (where == NULL) { 1264 /* 1265 * overestimate by 10 files 1266 */ 1267 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1268 return (0); 1269 } 1270 1271 /* 1272 * first copyout filehead 1273 */ 1274 if (buflen < sizeof(filehead)) { 1275 *sizep = 0; 1276 return (0); 1277 } 1278 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1279 if (error) 1280 return (error); 1281 buflen -= sizeof(filehead); 1282 where += sizeof(filehead); 1283 1284 /* 1285 * followed by an array of file structures 1286 */ 1287 LIST_FOREACH(fp, &filehead, f_list) { 1288 if (buflen < sizeof(struct file)) { 1289 *sizep = where - start; 1290 return (ENOMEM); 1291 } 1292 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1293 if (error) 1294 return (error); 1295 buflen -= sizeof(struct file); 1296 where += sizeof(struct file); 1297 } 1298 *sizep = where - start; 1299 return (0); 1300 } 1301 1302 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1303 #define FILL_PERM(src, dst) do { \ 1304 (dst)._key = (src)._key; \ 1305 (dst).uid = (src).uid; \ 1306 (dst).gid = (src).gid; \ 1307 (dst).cuid = (src).cuid; \ 1308 (dst).cgid = (src).cgid; \ 1309 (dst).mode = (src).mode; \ 1310 (dst)._seq = (src)._seq; \ 1311 } while (/*CONSTCOND*/ 0); 1312 #define FILL_MSG(src, dst) do { \ 1313 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1314 (dst).msg_qnum = (src).msg_qnum; \ 1315 (dst).msg_qbytes = (src).msg_qbytes; \ 1316 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1317 (dst).msg_lspid = (src).msg_lspid; \ 1318 (dst).msg_lrpid = (src).msg_lrpid; \ 1319 (dst).msg_stime = (src).msg_stime; \ 1320 (dst).msg_rtime = (src).msg_rtime; \ 1321 (dst).msg_ctime = (src).msg_ctime; \ 1322 } while (/*CONSTCOND*/ 0) 1323 #define FILL_SEM(src, dst) do { \ 1324 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1325 (dst).sem_nsems = (src).sem_nsems; \ 1326 (dst).sem_otime = (src).sem_otime; \ 1327 (dst).sem_ctime = (src).sem_ctime; \ 1328 } while (/*CONSTCOND*/ 0) 1329 #define FILL_SHM(src, dst) do { \ 1330 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1331 (dst).shm_segsz = (src).shm_segsz; \ 1332 (dst).shm_lpid = (src).shm_lpid; \ 1333 (dst).shm_cpid = (src).shm_cpid; \ 1334 (dst).shm_atime = (src).shm_atime; \ 1335 (dst).shm_dtime = (src).shm_dtime; \ 1336 (dst).shm_ctime = (src).shm_ctime; \ 1337 (dst).shm_nattch = (src).shm_nattch; \ 1338 } while (/*CONSTCOND*/ 0) 1339 1340 static int 1341 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1342 { 1343 #ifdef SYSVMSG 1344 struct msg_sysctl_info *msgsi = NULL; 1345 #endif 1346 #ifdef SYSVSEM 1347 struct sem_sysctl_info *semsi = NULL; 1348 #endif 1349 #ifdef SYSVSHM 1350 struct shm_sysctl_info *shmsi = NULL; 1351 #endif 1352 size_t infosize, dssize, tsize, buflen; 1353 void *buf = NULL; 1354 char *start; 1355 int32_t nds; 1356 int i, error, ret; 1357 1358 if (namelen != 1) 1359 return (EINVAL); 1360 1361 start = where; 1362 buflen = *sizep; 1363 1364 switch (*name) { 1365 case KERN_SYSVIPC_MSG_INFO: 1366 #ifdef SYSVMSG 1367 infosize = sizeof(msgsi->msginfo); 1368 nds = msginfo.msgmni; 1369 dssize = sizeof(msgsi->msgids[0]); 1370 break; 1371 #else 1372 return (EINVAL); 1373 #endif 1374 case KERN_SYSVIPC_SEM_INFO: 1375 #ifdef SYSVSEM 1376 infosize = sizeof(semsi->seminfo); 1377 nds = seminfo.semmni; 1378 dssize = sizeof(semsi->semids[0]); 1379 break; 1380 #else 1381 return (EINVAL); 1382 #endif 1383 case KERN_SYSVIPC_SHM_INFO: 1384 #ifdef SYSVSHM 1385 infosize = sizeof(shmsi->shminfo); 1386 nds = shminfo.shmmni; 1387 dssize = sizeof(shmsi->shmids[0]); 1388 break; 1389 #else 1390 return (EINVAL); 1391 #endif 1392 default: 1393 return (EINVAL); 1394 } 1395 /* 1396 * Round infosize to 64 bit boundary if requesting more than just 1397 * the info structure or getting the total data size. 1398 */ 1399 if (where == NULL || *sizep > infosize) 1400 infosize = ((infosize + 7) / 8) * 8; 1401 tsize = infosize + nds * dssize; 1402 1403 /* Return just the total size required. */ 1404 if (where == NULL) { 1405 *sizep = tsize; 1406 return (0); 1407 } 1408 1409 /* Not enough room for even the info struct. */ 1410 if (buflen < infosize) { 1411 *sizep = 0; 1412 return (ENOMEM); 1413 } 1414 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1415 memset(buf, 0, min(tsize, buflen)); 1416 1417 switch (*name) { 1418 #ifdef SYSVMSG 1419 case KERN_SYSVIPC_MSG_INFO: 1420 msgsi = (struct msg_sysctl_info *)buf; 1421 msgsi->msginfo = msginfo; 1422 break; 1423 #endif 1424 #ifdef SYSVSEM 1425 case KERN_SYSVIPC_SEM_INFO: 1426 semsi = (struct sem_sysctl_info *)buf; 1427 semsi->seminfo = seminfo; 1428 break; 1429 #endif 1430 #ifdef SYSVSHM 1431 case KERN_SYSVIPC_SHM_INFO: 1432 shmsi = (struct shm_sysctl_info *)buf; 1433 shmsi->shminfo = shminfo; 1434 break; 1435 #endif 1436 } 1437 buflen -= infosize; 1438 1439 ret = 0; 1440 if (buflen > 0) { 1441 /* Fill in the IPC data structures. */ 1442 for (i = 0; i < nds; i++) { 1443 if (buflen < dssize) { 1444 ret = ENOMEM; 1445 break; 1446 } 1447 switch (*name) { 1448 #ifdef SYSVMSG 1449 case KERN_SYSVIPC_MSG_INFO: 1450 FILL_MSG(msqids[i], msgsi->msgids[i]); 1451 break; 1452 #endif 1453 #ifdef SYSVSEM 1454 case KERN_SYSVIPC_SEM_INFO: 1455 FILL_SEM(sema[i], semsi->semids[i]); 1456 break; 1457 #endif 1458 #ifdef SYSVSHM 1459 case KERN_SYSVIPC_SHM_INFO: 1460 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1461 break; 1462 #endif 1463 } 1464 buflen -= dssize; 1465 } 1466 } 1467 *sizep -= buflen; 1468 error = copyout(buf, start, *sizep); 1469 /* If copyout succeeded, use return code set earlier. */ 1470 if (error == 0) 1471 error = ret; 1472 if (buf) 1473 free(buf, M_TEMP); 1474 return (error); 1475 } 1476 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1477 1478 static int 1479 sysctl_msgbuf(void *vwhere, size_t *sizep) 1480 { 1481 char *where = vwhere; 1482 size_t len, maxlen = *sizep; 1483 long beg, end; 1484 int error; 1485 1486 /* 1487 * deal with cases where the message buffer has 1488 * become corrupted. 1489 */ 1490 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1491 msgbufenabled = 0; 1492 return (ENXIO); 1493 } 1494 1495 if (where == NULL) { 1496 /* always return full buffer size */ 1497 *sizep = msgbufp->msg_bufs; 1498 return (0); 1499 } 1500 1501 error = 0; 1502 maxlen = min(msgbufp->msg_bufs, maxlen); 1503 1504 /* 1505 * First, copy from the write pointer to the end of 1506 * message buffer. 1507 */ 1508 beg = msgbufp->msg_bufx; 1509 end = msgbufp->msg_bufs; 1510 while (maxlen > 0) { 1511 len = min(end - beg, maxlen); 1512 if (len == 0) 1513 break; 1514 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1515 if (error) 1516 break; 1517 where += len; 1518 maxlen -= len; 1519 1520 /* 1521 * ... then, copy from the beginning of message buffer to 1522 * the write pointer. 1523 */ 1524 beg = 0; 1525 end = msgbufp->msg_bufx; 1526 } 1527 return (error); 1528 } 1529 1530 /* 1531 * try over estimating by 5 procs 1532 */ 1533 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1534 1535 static int 1536 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1537 { 1538 struct eproc eproc; 1539 struct kinfo_proc2 kproc2; 1540 struct kinfo_proc *dp; 1541 struct proc *p; 1542 const struct proclist_desc *pd; 1543 char *where, *dp2; 1544 int type, op, arg; 1545 u_int elem_size, elem_count; 1546 size_t buflen, needed; 1547 int error; 1548 1549 dp = vwhere; 1550 dp2 = where = vwhere; 1551 buflen = where != NULL ? *sizep : 0; 1552 error = 0; 1553 needed = 0; 1554 type = name[0]; 1555 1556 if (type == KERN_PROC) { 1557 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1558 return (EINVAL); 1559 op = name[1]; 1560 if (op != KERN_PROC_ALL) 1561 arg = name[2]; 1562 else 1563 arg = 0; /* Quell compiler warning */ 1564 elem_size = elem_count = 0; /* Ditto */ 1565 } else { 1566 if (namelen != 5) 1567 return (EINVAL); 1568 op = name[1]; 1569 arg = name[2]; 1570 elem_size = name[3]; 1571 elem_count = name[4]; 1572 } 1573 1574 proclist_lock_read(); 1575 1576 pd = proclists; 1577 again: 1578 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1579 /* 1580 * Skip embryonic processes. 1581 */ 1582 if (p->p_stat == SIDL) 1583 continue; 1584 /* 1585 * TODO - make more efficient (see notes below). 1586 * do by session. 1587 */ 1588 switch (op) { 1589 1590 case KERN_PROC_PID: 1591 /* could do this with just a lookup */ 1592 if (p->p_pid != (pid_t)arg) 1593 continue; 1594 break; 1595 1596 case KERN_PROC_PGRP: 1597 /* could do this by traversing pgrp */ 1598 if (p->p_pgrp->pg_id != (pid_t)arg) 1599 continue; 1600 break; 1601 1602 case KERN_PROC_SESSION: 1603 if (p->p_session->s_sid != (pid_t)arg) 1604 continue; 1605 break; 1606 1607 case KERN_PROC_TTY: 1608 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1609 if ((p->p_flag & P_CONTROLT) == 0 || 1610 p->p_session->s_ttyp == NULL || 1611 p->p_session->s_ttyvp != NULL) 1612 continue; 1613 } else if ((p->p_flag & P_CONTROLT) == 0 || 1614 p->p_session->s_ttyp == NULL) { 1615 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1616 continue; 1617 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1618 continue; 1619 break; 1620 1621 case KERN_PROC_UID: 1622 if (p->p_ucred->cr_uid != (uid_t)arg) 1623 continue; 1624 break; 1625 1626 case KERN_PROC_RUID: 1627 if (p->p_cred->p_ruid != (uid_t)arg) 1628 continue; 1629 break; 1630 1631 case KERN_PROC_GID: 1632 if (p->p_ucred->cr_gid != (uid_t)arg) 1633 continue; 1634 break; 1635 1636 case KERN_PROC_RGID: 1637 if (p->p_cred->p_rgid != (uid_t)arg) 1638 continue; 1639 break; 1640 1641 case KERN_PROC_ALL: 1642 /* allow everything */ 1643 break; 1644 1645 default: 1646 error = EINVAL; 1647 goto cleanup; 1648 } 1649 if (type == KERN_PROC) { 1650 if (buflen >= sizeof(struct kinfo_proc)) { 1651 fill_eproc(p, &eproc); 1652 error = copyout((caddr_t)p, &dp->kp_proc, 1653 sizeof(struct proc)); 1654 if (error) 1655 goto cleanup; 1656 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1657 sizeof(eproc)); 1658 if (error) 1659 goto cleanup; 1660 dp++; 1661 buflen -= sizeof(struct kinfo_proc); 1662 } 1663 needed += sizeof(struct kinfo_proc); 1664 } else { /* KERN_PROC2 */ 1665 if (buflen >= elem_size && elem_count > 0) { 1666 fill_kproc2(p, &kproc2); 1667 /* 1668 * Copy out elem_size, but not larger than 1669 * the size of a struct kinfo_proc2. 1670 */ 1671 error = copyout(&kproc2, dp2, 1672 min(sizeof(kproc2), elem_size)); 1673 if (error) 1674 goto cleanup; 1675 dp2 += elem_size; 1676 buflen -= elem_size; 1677 elem_count--; 1678 } 1679 needed += elem_size; 1680 } 1681 } 1682 pd++; 1683 if (pd->pd_list != NULL) 1684 goto again; 1685 proclist_unlock_read(); 1686 1687 if (where != NULL) { 1688 if (type == KERN_PROC) 1689 *sizep = (caddr_t)dp - where; 1690 else 1691 *sizep = dp2 - where; 1692 if (needed > *sizep) 1693 return (ENOMEM); 1694 } else { 1695 needed += KERN_PROCSLOP; 1696 *sizep = needed; 1697 } 1698 return (0); 1699 cleanup: 1700 proclist_unlock_read(); 1701 return (error); 1702 } 1703 1704 1705 /* 1706 * try over estimating by 5 LWPs 1707 */ 1708 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1709 1710 static int 1711 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1712 { 1713 struct kinfo_lwp klwp; 1714 struct proc *p; 1715 struct lwp *l; 1716 char *where, *dp; 1717 int type, pid, elem_size, elem_count; 1718 int buflen, needed, error; 1719 1720 dp = where = vwhere; 1721 buflen = where != NULL ? *sizep : 0; 1722 error = needed = 0; 1723 type = name[0]; 1724 1725 if (namelen != 4) 1726 return (EINVAL); 1727 pid = name[1]; 1728 elem_size = name[2]; 1729 elem_count = name[3]; 1730 1731 p = pfind(pid); 1732 if (p == NULL) 1733 return (ESRCH); 1734 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1735 if (buflen >= elem_size && elem_count > 0) { 1736 fill_lwp(l, &klwp); 1737 /* 1738 * Copy out elem_size, but not larger than 1739 * the size of a struct kinfo_proc2. 1740 */ 1741 error = copyout(&klwp, dp, 1742 min(sizeof(klwp), elem_size)); 1743 if (error) 1744 goto cleanup; 1745 dp += elem_size; 1746 buflen -= elem_size; 1747 elem_count--; 1748 } 1749 needed += elem_size; 1750 } 1751 1752 if (where != NULL) { 1753 *sizep = dp - where; 1754 if (needed > *sizep) 1755 return (ENOMEM); 1756 } else { 1757 needed += KERN_PROCSLOP; 1758 *sizep = needed; 1759 } 1760 return (0); 1761 cleanup: 1762 return (error); 1763 } 1764 1765 /* 1766 * Fill in an eproc structure for the specified process. 1767 */ 1768 void 1769 fill_eproc(struct proc *p, struct eproc *ep) 1770 { 1771 struct tty *tp; 1772 struct lwp *l; 1773 1774 ep->e_paddr = p; 1775 ep->e_sess = p->p_session; 1776 ep->e_pcred = *p->p_cred; 1777 ep->e_ucred = *p->p_ucred; 1778 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1779 ep->e_vm.vm_rssize = 0; 1780 ep->e_vm.vm_tsize = 0; 1781 ep->e_vm.vm_dsize = 0; 1782 ep->e_vm.vm_ssize = 0; 1783 /* ep->e_vm.vm_pmap = XXX; */ 1784 } else { 1785 struct vmspace *vm = p->p_vmspace; 1786 1787 ep->e_vm.vm_rssize = vm_resident_count(vm); 1788 ep->e_vm.vm_tsize = vm->vm_tsize; 1789 ep->e_vm.vm_dsize = vm->vm_dsize; 1790 ep->e_vm.vm_ssize = vm->vm_ssize; 1791 1792 /* Pick a "representative" LWP */ 1793 l = proc_representative_lwp(p); 1794 1795 if (l->l_wmesg) 1796 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1797 } 1798 if (p->p_pptr) 1799 ep->e_ppid = p->p_pptr->p_pid; 1800 else 1801 ep->e_ppid = 0; 1802 ep->e_pgid = p->p_pgrp->pg_id; 1803 ep->e_sid = ep->e_sess->s_sid; 1804 ep->e_jobc = p->p_pgrp->pg_jobc; 1805 if ((p->p_flag & P_CONTROLT) && 1806 (tp = ep->e_sess->s_ttyp)) { 1807 ep->e_tdev = tp->t_dev; 1808 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1809 ep->e_tsess = tp->t_session; 1810 } else 1811 ep->e_tdev = NODEV; 1812 1813 ep->e_xsize = ep->e_xrssize = 0; 1814 ep->e_xccount = ep->e_xswrss = 0; 1815 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1816 if (SESS_LEADER(p)) 1817 ep->e_flag |= EPROC_SLEADER; 1818 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1819 } 1820 1821 /* 1822 * Fill in an eproc structure for the specified process. 1823 */ 1824 static void 1825 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1826 { 1827 struct tty *tp; 1828 struct lwp *l; 1829 struct timeval ut, st; 1830 1831 memset(ki, 0, sizeof(*ki)); 1832 1833 ki->p_paddr = PTRTOINT64(p); 1834 ki->p_fd = PTRTOINT64(p->p_fd); 1835 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1836 ki->p_stats = PTRTOINT64(p->p_stats); 1837 ki->p_limit = PTRTOINT64(p->p_limit); 1838 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1839 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1840 ki->p_sess = PTRTOINT64(p->p_session); 1841 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1842 ki->p_ru = PTRTOINT64(p->p_ru); 1843 1844 ki->p_eflag = 0; 1845 ki->p_exitsig = p->p_exitsig; 1846 ki->p_flag = p->p_flag; 1847 1848 ki->p_pid = p->p_pid; 1849 if (p->p_pptr) 1850 ki->p_ppid = p->p_pptr->p_pid; 1851 else 1852 ki->p_ppid = 0; 1853 ki->p_sid = p->p_session->s_sid; 1854 ki->p__pgid = p->p_pgrp->pg_id; 1855 1856 ki->p_tpgid = NO_PGID; /* may be changed if controlling tty below */ 1857 1858 ki->p_uid = p->p_ucred->cr_uid; 1859 ki->p_ruid = p->p_cred->p_ruid; 1860 ki->p_gid = p->p_ucred->cr_gid; 1861 ki->p_rgid = p->p_cred->p_rgid; 1862 ki->p_svuid = p->p_cred->p_svuid; 1863 ki->p_svgid = p->p_cred->p_svgid; 1864 1865 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1866 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1867 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1868 1869 ki->p_jobc = p->p_pgrp->pg_jobc; 1870 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1871 ki->p_tdev = tp->t_dev; 1872 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1873 ki->p_tsess = PTRTOINT64(tp->t_session); 1874 } else { 1875 ki->p_tdev = NODEV; 1876 } 1877 1878 ki->p_estcpu = p->p_estcpu; 1879 ki->p_rtime_sec = p->p_rtime.tv_sec; 1880 ki->p_rtime_usec = p->p_rtime.tv_usec; 1881 ki->p_cpticks = p->p_cpticks; 1882 ki->p_pctcpu = p->p_pctcpu; 1883 1884 ki->p_uticks = p->p_uticks; 1885 ki->p_sticks = p->p_sticks; 1886 ki->p_iticks = p->p_iticks; 1887 1888 ki->p_tracep = PTRTOINT64(p->p_tracep); 1889 ki->p_traceflag = p->p_traceflag; 1890 1891 1892 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1893 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1894 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1895 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1896 1897 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1898 ki->p_realstat = p->p_stat; 1899 ki->p_nice = p->p_nice; 1900 1901 ki->p_xstat = p->p_xstat; 1902 ki->p_acflag = p->p_acflag; 1903 1904 strncpy(ki->p_comm, p->p_comm, 1905 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1906 1907 strncpy(ki->p_login, p->p_session->s_login, 1908 min(sizeof ki->p_login - 1, sizeof p->p_session->s_login)); 1909 1910 ki->p_nlwps = p->p_nlwps; 1911 ki->p_nrlwps = p->p_nrlwps; 1912 ki->p_realflag = p->p_flag; 1913 1914 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1915 ki->p_vm_rssize = 0; 1916 ki->p_vm_tsize = 0; 1917 ki->p_vm_dsize = 0; 1918 ki->p_vm_ssize = 0; 1919 l = NULL; 1920 } else { 1921 struct vmspace *vm = p->p_vmspace; 1922 1923 ki->p_vm_rssize = vm_resident_count(vm); 1924 ki->p_vm_tsize = vm->vm_tsize; 1925 ki->p_vm_dsize = vm->vm_dsize; 1926 ki->p_vm_ssize = vm->vm_ssize; 1927 1928 /* Pick a "representative" LWP */ 1929 l = proc_representative_lwp(p); 1930 ki->p_forw = PTRTOINT64(l->l_forw); 1931 ki->p_back = PTRTOINT64(l->l_back); 1932 ki->p_addr = PTRTOINT64(l->l_addr); 1933 ki->p_stat = l->l_stat; 1934 ki->p_flag |= l->l_flag; 1935 ki->p_swtime = l->l_swtime; 1936 ki->p_slptime = l->l_slptime; 1937 if (l->l_stat == LSONPROC) { 1938 KDASSERT(l->l_cpu != NULL); 1939 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1940 } else 1941 ki->p_schedflags = 0; 1942 ki->p_holdcnt = l->l_holdcnt; 1943 ki->p_priority = l->l_priority; 1944 ki->p_usrpri = l->l_usrpri; 1945 if (l->l_wmesg) 1946 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1947 ki->p_wchan = PTRTOINT64(l->l_wchan); 1948 1949 } 1950 1951 if (p->p_session->s_ttyvp) 1952 ki->p_eflag |= EPROC_CTTY; 1953 if (SESS_LEADER(p)) 1954 ki->p_eflag |= EPROC_SLEADER; 1955 1956 /* XXX Is this double check necessary? */ 1957 if (P_ZOMBIE(p)) { 1958 ki->p_uvalid = 0; 1959 } else { 1960 ki->p_uvalid = 1; 1961 1962 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1963 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1964 1965 calcru(p, &ut, &st, 0); 1966 ki->p_uutime_sec = ut.tv_sec; 1967 ki->p_uutime_usec = ut.tv_usec; 1968 ki->p_ustime_sec = st.tv_sec; 1969 ki->p_ustime_usec = st.tv_usec; 1970 1971 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1972 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1973 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1974 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1975 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1976 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1977 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1978 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1979 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1980 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1981 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1982 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1983 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1984 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1985 1986 timeradd(&p->p_stats->p_cru.ru_utime, 1987 &p->p_stats->p_cru.ru_stime, &ut); 1988 ki->p_uctime_sec = ut.tv_sec; 1989 ki->p_uctime_usec = ut.tv_usec; 1990 } 1991 #ifdef MULTIPROCESSOR 1992 if (l && l->l_cpu != NULL) 1993 ki->p_cpuid = l->l_cpu->ci_cpuid; 1994 else 1995 #endif 1996 ki->p_cpuid = KI_NOCPU; 1997 1998 } 1999 2000 /* 2001 * Fill in a kinfo_lwp structure for the specified lwp. 2002 */ 2003 static void 2004 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 2005 { 2006 2007 kl->l_forw = PTRTOINT64(l->l_forw); 2008 kl->l_back = PTRTOINT64(l->l_back); 2009 kl->l_laddr = PTRTOINT64(l); 2010 kl->l_addr = PTRTOINT64(l->l_addr); 2011 kl->l_stat = l->l_stat; 2012 kl->l_lid = l->l_lid; 2013 kl->l_flag = l->l_flag; 2014 2015 kl->l_swtime = l->l_swtime; 2016 kl->l_slptime = l->l_slptime; 2017 if (l->l_stat == LSONPROC) { 2018 KDASSERT(l->l_cpu != NULL); 2019 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 2020 } else 2021 kl->l_schedflags = 0; 2022 kl->l_holdcnt = l->l_holdcnt; 2023 kl->l_priority = l->l_priority; 2024 kl->l_usrpri = l->l_usrpri; 2025 if (l->l_wmesg) 2026 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 2027 kl->l_wchan = PTRTOINT64(l->l_wchan); 2028 #ifdef MULTIPROCESSOR 2029 if (l->l_cpu != NULL) 2030 kl->l_cpuid = l->l_cpu->ci_cpuid; 2031 else 2032 #endif 2033 kl->l_cpuid = KI_NOCPU; 2034 } 2035 2036 int 2037 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 2038 struct proc *up) 2039 { 2040 struct ps_strings pss; 2041 struct proc *p; 2042 size_t len, upper_bound, xlen, i; 2043 struct uio auio; 2044 struct iovec aiov; 2045 vaddr_t argv; 2046 pid_t pid; 2047 int nargv, type, error; 2048 char *arg; 2049 char *tmp; 2050 2051 if (namelen != 2) 2052 return (EINVAL); 2053 pid = name[0]; 2054 type = name[1]; 2055 2056 switch (type) { 2057 case KERN_PROC_ARGV: 2058 case KERN_PROC_NARGV: 2059 case KERN_PROC_ENV: 2060 case KERN_PROC_NENV: 2061 /* ok */ 2062 break; 2063 default: 2064 return (EINVAL); 2065 } 2066 2067 /* check pid */ 2068 if ((p = pfind(pid)) == NULL) 2069 return (EINVAL); 2070 2071 /* only root or same user change look at the environment */ 2072 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 2073 if (up->p_ucred->cr_uid != 0) { 2074 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 2075 up->p_cred->p_ruid != p->p_cred->p_svuid) 2076 return (EPERM); 2077 } 2078 } 2079 2080 if (sizep != NULL && where == NULL) { 2081 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 2082 *sizep = sizeof (int); 2083 else 2084 *sizep = ARG_MAX; /* XXX XXX XXX */ 2085 return (0); 2086 } 2087 if (where == NULL || sizep == NULL) 2088 return (EINVAL); 2089 2090 /* 2091 * Zombies don't have a stack, so we can't read their psstrings. 2092 * System processes also don't have a user stack. 2093 */ 2094 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 2095 return (EINVAL); 2096 2097 /* 2098 * Lock the process down in memory. 2099 */ 2100 /* XXXCDC: how should locking work here? */ 2101 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 2102 return (EFAULT); 2103 2104 p->p_vmspace->vm_refcnt++; /* XXX */ 2105 2106 /* 2107 * Allocate a temporary buffer to hold the arguments. 2108 */ 2109 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2110 2111 /* 2112 * Read in the ps_strings structure. 2113 */ 2114 aiov.iov_base = &pss; 2115 aiov.iov_len = sizeof(pss); 2116 auio.uio_iov = &aiov; 2117 auio.uio_iovcnt = 1; 2118 auio.uio_offset = (vaddr_t)p->p_psstr; 2119 auio.uio_resid = sizeof(pss); 2120 auio.uio_segflg = UIO_SYSSPACE; 2121 auio.uio_rw = UIO_READ; 2122 auio.uio_procp = NULL; 2123 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2124 if (error) 2125 goto done; 2126 2127 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2128 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2129 else 2130 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2131 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2132 error = copyout(&nargv, where, sizeof(nargv)); 2133 *sizep = sizeof(nargv); 2134 goto done; 2135 } 2136 /* 2137 * Now read the address of the argument vector. 2138 */ 2139 switch (type) { 2140 case KERN_PROC_ARGV: 2141 /* XXX compat32 stuff here */ 2142 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2143 break; 2144 case KERN_PROC_ENV: 2145 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2146 break; 2147 default: 2148 return (EINVAL); 2149 } 2150 auio.uio_offset = (off_t)(long)tmp; 2151 aiov.iov_base = &argv; 2152 aiov.iov_len = sizeof(argv); 2153 auio.uio_iov = &aiov; 2154 auio.uio_iovcnt = 1; 2155 auio.uio_resid = sizeof(argv); 2156 auio.uio_segflg = UIO_SYSSPACE; 2157 auio.uio_rw = UIO_READ; 2158 auio.uio_procp = NULL; 2159 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2160 if (error) 2161 goto done; 2162 2163 /* 2164 * Now copy in the actual argument vector, one page at a time, 2165 * since we don't know how long the vector is (though, we do 2166 * know how many NUL-terminated strings are in the vector). 2167 */ 2168 len = 0; 2169 upper_bound = *sizep; 2170 for (; nargv != 0 && len < upper_bound; len += xlen) { 2171 aiov.iov_base = arg; 2172 aiov.iov_len = PAGE_SIZE; 2173 auio.uio_iov = &aiov; 2174 auio.uio_iovcnt = 1; 2175 auio.uio_offset = argv + len; 2176 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2177 auio.uio_resid = xlen; 2178 auio.uio_segflg = UIO_SYSSPACE; 2179 auio.uio_rw = UIO_READ; 2180 auio.uio_procp = NULL; 2181 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2182 if (error) 2183 goto done; 2184 2185 for (i = 0; i < xlen && nargv != 0; i++) { 2186 if (arg[i] == '\0') 2187 nargv--; /* one full string */ 2188 } 2189 2190 /* 2191 * Make sure we don't copyout past the end of the user's 2192 * buffer. 2193 */ 2194 if (len + i > upper_bound) 2195 i = upper_bound - len; 2196 2197 error = copyout(arg, (char *)where + len, i); 2198 if (error) 2199 break; 2200 2201 if (nargv == 0) { 2202 len += i; 2203 break; 2204 } 2205 } 2206 *sizep = len; 2207 2208 done: 2209 uvmspace_free(p->p_vmspace); 2210 2211 free(arg, M_TEMP); 2212 return (error); 2213 } 2214 2215 #if NPTY > 0 2216 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2217 2218 /* 2219 * Validate parameters and get old / set new parameters 2220 * for pty sysctl function. 2221 */ 2222 static int 2223 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2224 { 2225 int error = 0; 2226 int oldmax = 0, newmax = 0; 2227 2228 /* get current value of maxptys */ 2229 oldmax = pty_maxptys(0, 0); 2230 2231 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2232 2233 if (!error && newp) { 2234 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2235 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2236 2237 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2238 return (EINVAL); 2239 2240 } 2241 2242 return (error); 2243 } 2244 #endif /* NPTY > 0 */ 2245 2246 static int 2247 sysctl_dotkstat(int *name, u_int namelen, void *where, size_t *sizep, 2248 void *newp) 2249 { 2250 2251 /* all sysctl names at this level are terminal */ 2252 if (namelen != 1) 2253 return (ENOTDIR); /* overloaded */ 2254 2255 switch (name[0]) { 2256 case KERN_TKSTAT_NIN: 2257 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2258 case KERN_TKSTAT_NOUT: 2259 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2260 case KERN_TKSTAT_CANCC: 2261 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2262 case KERN_TKSTAT_RAWCC: 2263 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2264 default: 2265 return (EOPNOTSUPP); 2266 } 2267 } 2268
Indexes created Sun Sep 21 20:09:37 GMT 2025