kern_sysctl.c revision 1.144
1 /* $NetBSD: kern_sysctl.c,v 1.144 2003/09/03 11:36:52 ragge 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 1.144 2003/09/03 11:36:52 ragge 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; 274 275 extern int kern_logsigexit; 276 extern fixpt_t ccpu; 277 extern int forkfsleep; 278 extern int dumponpanic; 279 280 #ifndef MULTIPROCESSOR 281 #define sysctl_ncpus() 1 282 #endif 283 284 #ifdef MULTIPROCESSOR 285 286 #ifndef CPU_INFO_FOREACH 287 #define CPU_INFO_ITERATOR int 288 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 289 #endif 290 291 static int 292 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 293 { 294 u_int64_t cp_time[CPUSTATES]; 295 int i; 296 struct cpu_info *ci; 297 CPU_INFO_ITERATOR cii; 298 299 for (i = 0; i < CPUSTATES; i++) 300 cp_time[i] = 0; 301 302 for (CPU_INFO_FOREACH(cii, ci)) { 303 for (i = 0; i < CPUSTATES; i++) 304 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 305 } 306 return (sysctl_rdstruct(oldp, oldlenp, newp, 307 cp_time, sizeof(cp_time))); 308 } 309 310 static int 311 sysctl_ncpus(void) 312 { 313 struct cpu_info *ci; 314 CPU_INFO_ITERATOR cii; 315 316 int ncpus = 0; 317 for (CPU_INFO_FOREACH(cii, ci)) 318 ncpus++; 319 return (ncpus); 320 } 321 322 #endif 323 324 /* 325 * kernel related system variables. 326 */ 327 int 328 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 329 void *newp, size_t newlen, struct proc *p) 330 { 331 int error, level, inthostid; 332 int old_autonicetime; 333 int old_vnodes; 334 dev_t consdev; 335 #if NRND > 0 336 int v; 337 #endif 338 339 /* All sysctl names at this level, except for a few, are terminal. */ 340 switch (name[0]) { 341 case KERN_PROC: 342 case KERN_PROC2: 343 case KERN_LWP: 344 case KERN_PROF: 345 case KERN_MBUF: 346 case KERN_PROC_ARGS: 347 case KERN_SYSVIPC_INFO: 348 case KERN_PIPE: 349 case KERN_TKSTAT: 350 /* Not terminal. */ 351 break; 352 default: 353 if (namelen != 1) 354 return (ENOTDIR); /* overloaded */ 355 } 356 357 switch (name[0]) { 358 case KERN_OSTYPE: 359 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 360 case KERN_OSRELEASE: 361 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 362 case KERN_OSREV: 363 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 364 case KERN_VERSION: 365 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 366 case KERN_MAXVNODES: 367 old_vnodes = desiredvnodes; 368 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 369 if (newp && !error) { 370 if (old_vnodes > desiredvnodes) { 371 error = vfs_drainvnodes(desiredvnodes, p); 372 if (error) { 373 desiredvnodes = old_vnodes; 374 return error; 375 } 376 } 377 vfs_reinit(); 378 nchreinit(); 379 } 380 return (error); 381 case KERN_MAXPROC: 382 { 383 int nmaxproc = maxproc; 384 385 error = sysctl_int(oldp, oldlenp, newp, newlen, &nmaxproc); 386 387 if (!error && newp) { 388 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 389 return (EINVAL); 390 391 #ifdef __HAVE_CPU_MAXPROC 392 if (nmaxproc > cpu_maxproc()) 393 return (EINVAL); 394 #endif 395 maxproc = nmaxproc; 396 } 397 398 return (error); 399 } 400 case KERN_MAXFILES: 401 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 402 case KERN_ARGMAX: 403 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 404 case KERN_SECURELVL: 405 level = securelevel; 406 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 407 newp == NULL) 408 return (error); 409 if (level < securelevel && p->p_pid != 1) 410 return (EPERM); 411 securelevel = level; 412 return (0); 413 case KERN_HOSTNAME: 414 error = sysctl_string(oldp, oldlenp, newp, newlen, 415 hostname, sizeof(hostname)); 416 if (newp && !error) 417 hostnamelen = newlen; 418 return (error); 419 case KERN_DOMAINNAME: 420 error = sysctl_string(oldp, oldlenp, newp, newlen, 421 domainname, sizeof(domainname)); 422 if (newp && !error) 423 domainnamelen = newlen; 424 return (error); 425 case KERN_HOSTID: 426 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 427 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 428 if (newp && !error) 429 hostid = inthostid; 430 return (error); 431 case KERN_CLOCKRATE: 432 return (sysctl_clockrate(oldp, oldlenp)); 433 case KERN_BOOTTIME: 434 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 435 sizeof(struct timeval))); 436 case KERN_VNODE: 437 return (sysctl_vnode(oldp, oldlenp, p)); 438 case KERN_PROC: 439 case KERN_PROC2: 440 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 441 case KERN_LWP: 442 return (sysctl_dolwp(name, namelen, oldp, oldlenp)); 443 case KERN_PROC_ARGS: 444 return (sysctl_procargs(name + 1, namelen - 1, 445 oldp, oldlenp, p)); 446 case KERN_FILE: 447 return (sysctl_file(oldp, oldlenp)); 448 #ifdef GPROF 449 case KERN_PROF: 450 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 451 newp, newlen)); 452 #endif 453 case KERN_POSIX1: 454 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 455 case KERN_NGROUPS: 456 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 457 case KERN_JOB_CONTROL: 458 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 459 case KERN_SAVED_IDS: 460 #ifdef _POSIX_SAVED_IDS 461 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 462 #else 463 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 464 #endif 465 case KERN_MAXPARTITIONS: 466 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 467 case KERN_RAWPARTITION: 468 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 469 #ifdef NTP 470 case KERN_NTPTIME: 471 return (sysctl_ntptime(oldp, oldlenp)); 472 #endif 473 case KERN_AUTONICETIME: 474 old_autonicetime = autonicetime; 475 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 476 if (autonicetime < 0) 477 autonicetime = old_autonicetime; 478 return (error); 479 case KERN_AUTONICEVAL: 480 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 481 if (autoniceval < PRIO_MIN) 482 autoniceval = PRIO_MIN; 483 if (autoniceval > PRIO_MAX) 484 autoniceval = PRIO_MAX; 485 return (error); 486 case KERN_RTC_OFFSET: 487 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 488 case KERN_ROOT_DEVICE: 489 return (sysctl_rdstring(oldp, oldlenp, newp, 490 root_device->dv_xname)); 491 case KERN_MSGBUFSIZE: 492 /* 493 * deal with cases where the message buffer has 494 * become corrupted. 495 */ 496 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 497 msgbufenabled = 0; 498 return (ENXIO); 499 } 500 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 501 case KERN_FSYNC: 502 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 503 case KERN_SYSVMSG: 504 #ifdef SYSVMSG 505 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 506 #else 507 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 508 #endif 509 case KERN_SYSVSEM: 510 #ifdef SYSVSEM 511 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 512 #else 513 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 514 #endif 515 case KERN_SYSVSHM: 516 #ifdef SYSVSHM 517 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 518 #else 519 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 520 #endif 521 case KERN_DEFCORENAME: 522 if (newp && newlen < 1) 523 return (EINVAL); 524 error = sysctl_string(oldp, oldlenp, newp, newlen, 525 defcorename, sizeof(defcorename)); 526 return (error); 527 case KERN_SYNCHRONIZED_IO: 528 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 529 case KERN_IOV_MAX: 530 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 531 case KERN_MBUF: 532 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 533 newp, newlen)); 534 case KERN_MAPPED_FILES: 535 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 536 case KERN_MEMLOCK: 537 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 538 case KERN_MEMLOCK_RANGE: 539 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 540 case KERN_MEMORY_PROTECTION: 541 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 542 case KERN_LOGIN_NAME_MAX: 543 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 544 case KERN_LOGSIGEXIT: 545 return (sysctl_int(oldp, oldlenp, newp, newlen, 546 &kern_logsigexit)); 547 case KERN_FSCALE: 548 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 549 case KERN_CCPU: 550 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 551 case KERN_CP_TIME: 552 #ifndef MULTIPROCESSOR 553 return (sysctl_rdstruct(oldp, oldlenp, newp, 554 curcpu()->ci_schedstate.spc_cp_time, 555 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 556 #else 557 return (sysctl_docptime(oldp, oldlenp, newp)); 558 #endif 559 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 560 case KERN_SYSVIPC_INFO: 561 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 562 #endif 563 case KERN_MSGBUF: 564 return (sysctl_msgbuf(oldp, oldlenp)); 565 case KERN_CONSDEV: 566 if (cn_tab != NULL) 567 consdev = cn_tab->cn_dev; 568 else 569 consdev = NODEV; 570 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 571 sizeof consdev)); 572 #if NPTY > 0 573 case KERN_MAXPTYS: 574 return (sysctl_pty(oldp, oldlenp, newp, newlen)); 575 #endif 576 #ifndef PIPE_SOCKETPAIR 577 case KERN_PIPE: 578 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 579 newp, newlen)); 580 #endif 581 case KERN_MAXPHYS: 582 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 583 case KERN_SOMAXKVA: 584 { 585 int new_somaxkva = somaxkva; 586 587 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_somaxkva); 588 if (newp && !error) { 589 if (new_somaxkva < (16 * 1024 * 1024)) /* sanity */ 590 return (EINVAL); 591 somaxkva = new_somaxkva; 592 } 593 return (error); 594 } 595 case KERN_SBMAX: 596 { 597 int new_sbmax = sb_max; 598 599 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 600 if (newp && !error) { 601 if (new_sbmax < (16 * 1024)) /* sanity */ 602 return (EINVAL); 603 sb_max = new_sbmax; 604 } 605 return (error); 606 } 607 case KERN_TKSTAT: 608 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 609 newp)); 610 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 611 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 612 case KERN_URND: 613 #if NRND > 0 614 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 615 sizeof(v)) 616 return (sysctl_rdint(oldp, oldlenp, newp, v)); 617 else 618 return (EIO); /*XXX*/ 619 #else 620 return (EOPNOTSUPP); 621 #endif 622 case KERN_LABELSECTOR: 623 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 624 case KERN_LABELOFFSET: 625 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 626 case KERN_FORKFSLEEP: 627 { 628 /* userland sees value in ms, internally is in ticks */ 629 int timo, lsleep = forkfsleep * 1000 / hz; 630 631 error = sysctl_int(oldp, oldlenp, newp, newlen, &lsleep); 632 if (newp && !error) { 633 /* refuse negative values, and overly 'long time' */ 634 if (lsleep < 0 || lsleep > MAXSLP * 1000) 635 return (EINVAL); 636 637 timo = mstohz(lsleep); 638 639 /* if the interval is >0 ms && <1 tick, use 1 tick */ 640 if (lsleep != 0 && timo == 0) 641 forkfsleep = 1; 642 else 643 forkfsleep = timo; 644 } 645 return (error); 646 } 647 case KERN_POSIX_THREADS: /* XXX _POSIX_VERSION */ 648 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 649 case KERN_POSIX_SEMAPHORES: /* XXX _POSIX_VERSION */ 650 #ifdef P1003_1B_SEMAPHORE 651 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 652 #else 653 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 654 #endif 655 case KERN_POSIX_BARRIERS: /* XXX _POSIX_VERSION */ 656 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 657 case KERN_POSIX_TIMERS: /* XXX _POSIX_VERSION */ 658 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 659 case KERN_POSIX_SPIN_LOCKS: /* XXX _POSIX_VERSION */ 660 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 661 case KERN_POSIX_READER_WRITER_LOCKS: /* XXX _POSIX_VERSION */ 662 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 663 case KERN_DUMP_ON_PANIC: 664 return (sysctl_int(oldp, oldlenp, newp, newlen, &dumponpanic)); 665 666 default: 667 return (EOPNOTSUPP); 668 } 669 /* NOTREACHED */ 670 } 671 672 /* 673 * hardware related system variables. 674 */ 675 int 676 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 677 void *newp, size_t newlen, struct proc *p) 678 { 679 680 /* All sysctl names at this level, except for a few, are terminal. */ 681 switch (name[0]) { 682 case HW_DISKSTATS: 683 /* Not terminal. */ 684 break; 685 default: 686 if (namelen != 1) 687 return (ENOTDIR); /* overloaded */ 688 } 689 690 switch (name[0]) { 691 case HW_MACHINE: 692 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 693 case HW_MACHINE_ARCH: 694 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 695 case HW_MODEL: 696 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 697 case HW_NCPU: 698 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 699 case HW_BYTEORDER: 700 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 701 case HW_PHYSMEM: 702 { 703 u_int rval; 704 705 if ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) 706 rval = UINT_MAX; 707 else 708 rval = physmem * PAGE_SIZE; 709 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 710 } 711 case HW_PHYSMEM64: 712 return (sysctl_rdquad(oldp, oldlenp, newp, 713 (u_quad_t)physmem * PAGE_SIZE)); 714 case HW_USERMEM: 715 { 716 u_int rval; 717 718 if ((u_int)(physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 719 rval = UINT_MAX; 720 else 721 rval = (physmem - uvmexp.wired) * PAGE_SIZE; 722 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 723 } 724 case HW_USERMEM64: 725 return (sysctl_rdquad(oldp, oldlenp, newp, 726 (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE)); 727 case HW_PAGESIZE: 728 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 729 case HW_ALIGNBYTES: 730 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 731 case HW_DISKNAMES: 732 return (sysctl_disknames(oldp, oldlenp)); 733 case HW_DISKSTATS: 734 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 735 case HW_CNMAGIC: { 736 char magic[CNS_LEN]; 737 int error; 738 739 if (oldp) 740 cn_get_magic(magic, CNS_LEN); 741 error = sysctl_string(oldp, oldlenp, newp, newlen, 742 magic, sizeof(magic)); 743 if (newp && !error) { 744 error = cn_set_magic(magic); 745 } 746 return (error); 747 } 748 default: 749 return (EOPNOTSUPP); 750 } 751 /* NOTREACHED */ 752 } 753 754 #ifdef DEBUG 755 /* 756 * Debugging related system variables. 757 */ 758 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 759 struct ctldebug debug5, debug6, debug7, debug8, debug9; 760 struct ctldebug debug10, debug11, debug12, debug13, debug14; 761 struct ctldebug debug15, debug16, debug17, debug18, debug19; 762 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 763 &debug0, &debug1, &debug2, &debug3, &debug4, 764 &debug5, &debug6, &debug7, &debug8, &debug9, 765 &debug10, &debug11, &debug12, &debug13, &debug14, 766 &debug15, &debug16, &debug17, &debug18, &debug19, 767 }; 768 769 int 770 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 771 void *newp, size_t newlen, struct proc *p) 772 { 773 struct ctldebug *cdp; 774 775 /* all sysctl names at this level are name and field */ 776 if (namelen != 2) 777 return (ENOTDIR); /* overloaded */ 778 if (name[0] >= CTL_DEBUG_MAXID) 779 return (EOPNOTSUPP); 780 cdp = debugvars[name[0]]; 781 if (cdp->debugname == 0) 782 return (EOPNOTSUPP); 783 switch (name[1]) { 784 case CTL_DEBUG_NAME: 785 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 786 case CTL_DEBUG_VALUE: 787 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 788 default: 789 return (EOPNOTSUPP); 790 } 791 /* NOTREACHED */ 792 } 793 #endif /* DEBUG */ 794 795 int 796 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 797 void *newp, size_t newlen, struct proc *p) 798 { 799 struct proc *ptmp = NULL; 800 int error = 0; 801 struct rlimit alim; 802 struct plimit *newplim; 803 char *tmps = NULL; 804 size_t len, curlen; 805 u_int i; 806 int si; 807 808 if (namelen < 2) 809 return (EINVAL); 810 811 if (name[0] == PROC_CURPROC) { 812 ptmp = p; 813 } else if ((ptmp = pfind((pid_t)name[0])) == NULL) { 814 return (ESRCH); 815 } else { 816 if (p->p_ucred->cr_uid != 0) { 817 if (p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 818 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 819 return (EPERM); 820 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 821 return (EPERM); /* sgid proc */ 822 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 823 if (p->p_ucred->cr_groups[i] == 824 ptmp->p_cred->p_rgid) 825 break; 826 } 827 if (i == p->p_ucred->cr_ngroups) 828 return (EPERM); 829 } 830 } 831 switch (name[1]) { 832 case PROC_PID_STOPFORK: 833 if (namelen != 2) 834 return (EINVAL); 835 si = ((ptmp->p_flag & P_STOPFORK) != 0); 836 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &si)) != 0) 837 return (error); 838 if (si != 0) 839 ptmp->p_flag |= P_STOPFORK; 840 else 841 ptmp->p_flag &= ~P_STOPFORK; 842 return (0); 843 break; 844 845 case PROC_PID_STOPEXEC: 846 if (namelen != 2) 847 return (EINVAL); 848 si = ((ptmp->p_flag & P_STOPEXEC) != 0); 849 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &si)) != 0) 850 return (error); 851 if (si != 0) 852 ptmp->p_flag |= P_STOPEXEC; 853 else 854 ptmp->p_flag &= ~P_STOPEXEC; 855 return (0); 856 break; 857 858 case PROC_PID_CORENAME: 859 if (namelen != 2) 860 return (EINVAL); 861 /* 862 * Can't use sysctl_string() here because we may malloc a new 863 * area during the process, so we have to do it by hand. 864 */ 865 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 866 if (oldlenp && *oldlenp < curlen) { 867 if (!oldp) 868 *oldlenp = curlen; 869 return (ENOMEM); 870 } 871 if (newp) { 872 if (securelevel > 2) 873 return (EPERM); 874 if (newlen > MAXPATHLEN) 875 return (ENAMETOOLONG); 876 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 877 if (tmps == NULL) 878 return (ENOMEM); 879 error = copyin(newp, tmps, newlen + 1); 880 tmps[newlen] = '\0'; 881 if (error) 882 goto cleanup; 883 /* Enforce to be either 'core' for end with '.core' */ 884 if (newlen < 4) { /* c.o.r.e */ 885 error = EINVAL; 886 goto cleanup; 887 } 888 len = newlen - 4; 889 if (len > 0) { 890 if (tmps[len - 1] != '.' && 891 tmps[len - 1] != '/') { 892 error = EINVAL; 893 goto cleanup; 894 } 895 } 896 if (strcmp(&tmps[len], "core") != 0) { 897 error = EINVAL; 898 goto cleanup; 899 } 900 } 901 if (oldp && oldlenp) { 902 *oldlenp = curlen; 903 error = copyout(ptmp->p_limit->pl_corename, oldp, 904 curlen); 905 } 906 if (newp && error == 0) { 907 /* if the 2 strings are identical, don't limcopy() */ 908 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 909 error = 0; 910 goto cleanup; 911 } 912 if (ptmp->p_limit->p_refcnt > 1 && 913 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 914 newplim = limcopy(ptmp->p_limit); 915 limfree(ptmp->p_limit); 916 ptmp->p_limit = newplim; 917 } 918 if (ptmp->p_limit->pl_corename != defcorename) { 919 free(ptmp->p_limit->pl_corename, M_TEMP); 920 } 921 ptmp->p_limit->pl_corename = tmps; 922 return (0); 923 } 924 cleanup: 925 if (tmps) 926 free(tmps, M_TEMP); 927 return (error); 928 break; 929 930 case PROC_PID_LIMIT: 931 if (namelen != 4 || name[2] < 1 || 932 name[2] >= PROC_PID_LIMIT_MAXID) 933 return (EINVAL); 934 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 935 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 936 error = sysctl_quad(oldp, oldlenp, newp, newlen, 937 &alim.rlim_max); 938 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 939 error = sysctl_quad(oldp, oldlenp, newp, newlen, 940 &alim.rlim_cur); 941 else 942 error = (EINVAL); 943 944 if (error) 945 return (error); 946 947 if (newp) 948 error = dosetrlimit(ptmp, p->p_cred, 949 name[2] - 1, &alim); 950 return (error); 951 break; 952 953 default: 954 return (EINVAL); 955 break; 956 } 957 /* NOTREACHED */ 958 return (EINVAL); 959 } 960 961 int 962 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 963 void *newp, size_t newlen, struct proc *p) 964 { 965 static struct { 966 const char *name; 967 int type; 968 } emulations[] = CTL_EMUL_NAMES; 969 const struct emul *e; 970 const char *ename; 971 #ifdef LKM 972 extern struct lock exec_lock; /* XXX */ 973 int error; 974 #else 975 extern int nexecs_builtin; 976 extern const struct execsw execsw_builtin[]; 977 int i; 978 #endif 979 980 /* all sysctl names at this level are name and field */ 981 if (namelen < 2) 982 return (ENOTDIR); /* overloaded */ 983 984 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 985 return (EOPNOTSUPP); 986 987 ename = emulations[name[0]].name; 988 989 #ifdef LKM 990 lockmgr(&exec_lock, LK_SHARED, NULL); 991 if ((e = emul_search(ename))) { 992 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 993 newp, newlen, p); 994 } else 995 error = EOPNOTSUPP; 996 lockmgr(&exec_lock, LK_RELEASE, NULL); 997 998 return (error); 999 #else 1000 for (i = 0; i < nexecs_builtin; i++) { 1001 e = execsw_builtin[i].es_emul; 1002 /* 1003 * In order to match e.g. e->e_name "irix o32" 1004 * with ename "irix", we limit the comparison 1005 * to the length of ename. 1006 */ 1007 if (e == NULL || 1008 strncmp(ename, e->e_name, strlen(ename)) != 0 || 1009 e->e_sysctl == NULL) 1010 continue; 1011 1012 return ((*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1013 newp, newlen, p)); 1014 } 1015 1016 return (EOPNOTSUPP); 1017 #endif 1018 } 1019 /* 1020 * Convenience macros. 1021 */ 1022 1023 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 1024 if (oldlenp) { \ 1025 if (!oldp) \ 1026 *oldlenp = len; \ 1027 else { \ 1028 if (*oldlenp < len) \ 1029 return (ENOMEM); \ 1030 *oldlenp = len; \ 1031 error = copyout((caddr_t)valp, oldp, len); \ 1032 } \ 1033 } 1034 1035 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 1036 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 1037 1038 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 1039 if (newp && newlen != len) \ 1040 return (EINVAL); 1041 1042 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1043 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1044 1045 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1046 if (error == 0 && newp) \ 1047 error = copyin(newp, valp, len); 1048 1049 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1050 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1051 1052 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1053 if (oldlenp) { \ 1054 len = strlen(str) + 1; \ 1055 if (!oldp) \ 1056 *oldlenp = len; \ 1057 else { \ 1058 if (*oldlenp < len) { \ 1059 err2 = ENOMEM; \ 1060 len = *oldlenp; \ 1061 } else \ 1062 *oldlenp = len; \ 1063 error = copyout(str, oldp, len);\ 1064 if (error == 0) \ 1065 error = err2; \ 1066 } \ 1067 } 1068 1069 /* 1070 * Validate parameters and get old / set new parameters 1071 * for an integer-valued sysctl function. 1072 */ 1073 int 1074 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1075 { 1076 int error = 0; 1077 1078 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1079 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1080 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1081 1082 return (error); 1083 } 1084 1085 1086 /* 1087 * As above, but read-only. 1088 */ 1089 int 1090 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1091 { 1092 int error = 0; 1093 1094 if (newp) 1095 return (EPERM); 1096 1097 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1098 1099 return (error); 1100 } 1101 1102 /* 1103 * Validate parameters and get old / set new parameters 1104 * for an quad-valued sysctl function. 1105 */ 1106 int 1107 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1108 quad_t *valp) 1109 { 1110 int error = 0; 1111 1112 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1113 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1114 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1115 1116 return (error); 1117 } 1118 1119 /* 1120 * As above, but read-only. 1121 */ 1122 int 1123 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1124 { 1125 int error = 0; 1126 1127 if (newp) 1128 return (EPERM); 1129 1130 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1131 1132 return (error); 1133 } 1134 1135 /* 1136 * Validate parameters and get old / set new parameters 1137 * for a string-valued sysctl function. 1138 */ 1139 int 1140 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1141 size_t maxlen) 1142 { 1143 int error = 0, err2 = 0; 1144 size_t len; 1145 1146 if (newp && newlen >= maxlen) 1147 return (EINVAL); 1148 1149 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1150 1151 if (error == 0 && newp) { 1152 error = copyin(newp, str, newlen); 1153 str[newlen] = 0; 1154 } 1155 return (error); 1156 } 1157 1158 /* 1159 * As above, but read-only. 1160 */ 1161 int 1162 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1163 { 1164 int error = 0, err2 = 0; 1165 size_t len; 1166 1167 if (newp) 1168 return (EPERM); 1169 1170 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1171 1172 return (error); 1173 } 1174 1175 /* 1176 * Validate parameters and get old / set new parameters 1177 * for a structure oriented sysctl function. 1178 */ 1179 int 1180 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1181 size_t len) 1182 { 1183 int error = 0; 1184 1185 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1186 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1187 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1188 1189 return (error); 1190 } 1191 1192 /* 1193 * Validate parameters and get old parameters 1194 * for a structure oriented sysctl function. 1195 */ 1196 int 1197 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1198 size_t len) 1199 { 1200 int error = 0; 1201 1202 if (newp) 1203 return (EPERM); 1204 1205 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1206 1207 return (error); 1208 } 1209 1210 /* 1211 * As above, but can return a truncated result. 1212 */ 1213 int 1214 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1215 size_t len) 1216 { 1217 int error = 0; 1218 1219 if (newp) 1220 return (EPERM); 1221 1222 len = min(*oldlenp, len); 1223 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1224 1225 return (error); 1226 } 1227 1228 /* 1229 * Get file structures. 1230 */ 1231 static int 1232 sysctl_file(void *vwhere, size_t *sizep) 1233 { 1234 int error; 1235 size_t buflen; 1236 struct file *fp; 1237 char *start, *where; 1238 1239 start = where = vwhere; 1240 buflen = *sizep; 1241 if (where == NULL) { 1242 /* 1243 * overestimate by 10 files 1244 */ 1245 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1246 return (0); 1247 } 1248 1249 /* 1250 * first copyout filehead 1251 */ 1252 if (buflen < sizeof(filehead)) { 1253 *sizep = 0; 1254 return (0); 1255 } 1256 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1257 if (error) 1258 return (error); 1259 buflen -= sizeof(filehead); 1260 where += sizeof(filehead); 1261 1262 /* 1263 * followed by an array of file structures 1264 */ 1265 LIST_FOREACH(fp, &filehead, f_list) { 1266 if (buflen < sizeof(struct file)) { 1267 *sizep = where - start; 1268 return (ENOMEM); 1269 } 1270 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1271 if (error) 1272 return (error); 1273 buflen -= sizeof(struct file); 1274 where += sizeof(struct file); 1275 } 1276 *sizep = where - start; 1277 return (0); 1278 } 1279 1280 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1281 #define FILL_PERM(src, dst) do { \ 1282 (dst)._key = (src)._key; \ 1283 (dst).uid = (src).uid; \ 1284 (dst).gid = (src).gid; \ 1285 (dst).cuid = (src).cuid; \ 1286 (dst).cgid = (src).cgid; \ 1287 (dst).mode = (src).mode; \ 1288 (dst)._seq = (src)._seq; \ 1289 } while (/*CONSTCOND*/ 0); 1290 #define FILL_MSG(src, dst) do { \ 1291 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1292 (dst).msg_qnum = (src).msg_qnum; \ 1293 (dst).msg_qbytes = (src).msg_qbytes; \ 1294 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1295 (dst).msg_lspid = (src).msg_lspid; \ 1296 (dst).msg_lrpid = (src).msg_lrpid; \ 1297 (dst).msg_stime = (src).msg_stime; \ 1298 (dst).msg_rtime = (src).msg_rtime; \ 1299 (dst).msg_ctime = (src).msg_ctime; \ 1300 } while (/*CONSTCOND*/ 0) 1301 #define FILL_SEM(src, dst) do { \ 1302 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1303 (dst).sem_nsems = (src).sem_nsems; \ 1304 (dst).sem_otime = (src).sem_otime; \ 1305 (dst).sem_ctime = (src).sem_ctime; \ 1306 } while (/*CONSTCOND*/ 0) 1307 #define FILL_SHM(src, dst) do { \ 1308 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1309 (dst).shm_segsz = (src).shm_segsz; \ 1310 (dst).shm_lpid = (src).shm_lpid; \ 1311 (dst).shm_cpid = (src).shm_cpid; \ 1312 (dst).shm_atime = (src).shm_atime; \ 1313 (dst).shm_dtime = (src).shm_dtime; \ 1314 (dst).shm_ctime = (src).shm_ctime; \ 1315 (dst).shm_nattch = (src).shm_nattch; \ 1316 } while (/*CONSTCOND*/ 0) 1317 1318 static int 1319 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1320 { 1321 #ifdef SYSVMSG 1322 struct msg_sysctl_info *msgsi = NULL; 1323 #endif 1324 #ifdef SYSVSEM 1325 struct sem_sysctl_info *semsi = NULL; 1326 #endif 1327 #ifdef SYSVSHM 1328 struct shm_sysctl_info *shmsi = NULL; 1329 #endif 1330 size_t infosize, dssize, tsize, buflen; 1331 void *buf = NULL; 1332 char *start; 1333 int32_t nds; 1334 int i, error, ret; 1335 1336 if (namelen != 1) 1337 return (EINVAL); 1338 1339 start = where; 1340 buflen = *sizep; 1341 1342 switch (*name) { 1343 case KERN_SYSVIPC_MSG_INFO: 1344 #ifdef SYSVMSG 1345 infosize = sizeof(msgsi->msginfo); 1346 nds = msginfo.msgmni; 1347 dssize = sizeof(msgsi->msgids[0]); 1348 break; 1349 #else 1350 return (EINVAL); 1351 #endif 1352 case KERN_SYSVIPC_SEM_INFO: 1353 #ifdef SYSVSEM 1354 infosize = sizeof(semsi->seminfo); 1355 nds = seminfo.semmni; 1356 dssize = sizeof(semsi->semids[0]); 1357 break; 1358 #else 1359 return (EINVAL); 1360 #endif 1361 case KERN_SYSVIPC_SHM_INFO: 1362 #ifdef SYSVSHM 1363 infosize = sizeof(shmsi->shminfo); 1364 nds = shminfo.shmmni; 1365 dssize = sizeof(shmsi->shmids[0]); 1366 break; 1367 #else 1368 return (EINVAL); 1369 #endif 1370 default: 1371 return (EINVAL); 1372 } 1373 /* 1374 * Round infosize to 64 bit boundary if requesting more than just 1375 * the info structure or getting the total data size. 1376 */ 1377 if (where == NULL || *sizep > infosize) 1378 infosize = ((infosize + 7) / 8) * 8; 1379 tsize = infosize + nds * dssize; 1380 1381 /* Return just the total size required. */ 1382 if (where == NULL) { 1383 *sizep = tsize; 1384 return (0); 1385 } 1386 1387 /* Not enough room for even the info struct. */ 1388 if (buflen < infosize) { 1389 *sizep = 0; 1390 return (ENOMEM); 1391 } 1392 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1393 memset(buf, 0, min(tsize, buflen)); 1394 1395 switch (*name) { 1396 #ifdef SYSVMSG 1397 case KERN_SYSVIPC_MSG_INFO: 1398 msgsi = (struct msg_sysctl_info *)buf; 1399 msgsi->msginfo = msginfo; 1400 break; 1401 #endif 1402 #ifdef SYSVSEM 1403 case KERN_SYSVIPC_SEM_INFO: 1404 semsi = (struct sem_sysctl_info *)buf; 1405 semsi->seminfo = seminfo; 1406 break; 1407 #endif 1408 #ifdef SYSVSHM 1409 case KERN_SYSVIPC_SHM_INFO: 1410 shmsi = (struct shm_sysctl_info *)buf; 1411 shmsi->shminfo = shminfo; 1412 break; 1413 #endif 1414 } 1415 buflen -= infosize; 1416 1417 ret = 0; 1418 if (buflen > 0) { 1419 /* Fill in the IPC data structures. */ 1420 for (i = 0; i < nds; i++) { 1421 if (buflen < dssize) { 1422 ret = ENOMEM; 1423 break; 1424 } 1425 switch (*name) { 1426 #ifdef SYSVMSG 1427 case KERN_SYSVIPC_MSG_INFO: 1428 FILL_MSG(msqids[i], msgsi->msgids[i]); 1429 break; 1430 #endif 1431 #ifdef SYSVSEM 1432 case KERN_SYSVIPC_SEM_INFO: 1433 FILL_SEM(sema[i], semsi->semids[i]); 1434 break; 1435 #endif 1436 #ifdef SYSVSHM 1437 case KERN_SYSVIPC_SHM_INFO: 1438 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1439 break; 1440 #endif 1441 } 1442 buflen -= dssize; 1443 } 1444 } 1445 *sizep -= buflen; 1446 error = copyout(buf, start, *sizep); 1447 /* If copyout succeeded, use return code set earlier. */ 1448 if (error == 0) 1449 error = ret; 1450 if (buf) 1451 free(buf, M_TEMP); 1452 return (error); 1453 } 1454 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1455 1456 static int 1457 sysctl_msgbuf(void *vwhere, size_t *sizep) 1458 { 1459 char *where = vwhere; 1460 size_t len, maxlen = *sizep; 1461 long beg, end; 1462 int error; 1463 1464 /* 1465 * deal with cases where the message buffer has 1466 * become corrupted. 1467 */ 1468 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1469 msgbufenabled = 0; 1470 return (ENXIO); 1471 } 1472 1473 if (where == NULL) { 1474 /* always return full buffer size */ 1475 *sizep = msgbufp->msg_bufs; 1476 return (0); 1477 } 1478 1479 error = 0; 1480 maxlen = min(msgbufp->msg_bufs, maxlen); 1481 1482 /* 1483 * First, copy from the write pointer to the end of 1484 * message buffer. 1485 */ 1486 beg = msgbufp->msg_bufx; 1487 end = msgbufp->msg_bufs; 1488 while (maxlen > 0) { 1489 len = min(end - beg, maxlen); 1490 if (len == 0) 1491 break; 1492 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1493 if (error) 1494 break; 1495 where += len; 1496 maxlen -= len; 1497 1498 /* 1499 * ... then, copy from the beginning of message buffer to 1500 * the write pointer. 1501 */ 1502 beg = 0; 1503 end = msgbufp->msg_bufx; 1504 } 1505 return (error); 1506 } 1507 1508 /* 1509 * try over estimating by 5 procs 1510 */ 1511 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1512 1513 static int 1514 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1515 { 1516 struct eproc eproc; 1517 struct kinfo_proc2 kproc2; 1518 struct kinfo_proc *dp; 1519 struct proc *p; 1520 const struct proclist_desc *pd; 1521 char *where, *dp2; 1522 int type, op, arg; 1523 u_int elem_size, elem_count; 1524 size_t buflen, needed; 1525 int error; 1526 1527 dp = vwhere; 1528 dp2 = where = vwhere; 1529 buflen = where != NULL ? *sizep : 0; 1530 error = 0; 1531 needed = 0; 1532 type = name[0]; 1533 1534 if (type == KERN_PROC) { 1535 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1536 return (EINVAL); 1537 op = name[1]; 1538 if (op != KERN_PROC_ALL) 1539 arg = name[2]; 1540 else 1541 arg = 0; /* Quell compiler warning */ 1542 elem_size = elem_count = 0; /* Ditto */ 1543 } else { 1544 if (namelen != 5) 1545 return (EINVAL); 1546 op = name[1]; 1547 arg = name[2]; 1548 elem_size = name[3]; 1549 elem_count = name[4]; 1550 } 1551 1552 proclist_lock_read(); 1553 1554 pd = proclists; 1555 again: 1556 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1557 /* 1558 * Skip embryonic processes. 1559 */ 1560 if (p->p_stat == SIDL) 1561 continue; 1562 /* 1563 * TODO - make more efficient (see notes below). 1564 * do by session. 1565 */ 1566 switch (op) { 1567 1568 case KERN_PROC_PID: 1569 /* could do this with just a lookup */ 1570 if (p->p_pid != (pid_t)arg) 1571 continue; 1572 break; 1573 1574 case KERN_PROC_PGRP: 1575 /* could do this by traversing pgrp */ 1576 if (p->p_pgrp->pg_id != (pid_t)arg) 1577 continue; 1578 break; 1579 1580 case KERN_PROC_SESSION: 1581 if (p->p_session->s_sid != (pid_t)arg) 1582 continue; 1583 break; 1584 1585 case KERN_PROC_TTY: 1586 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1587 if ((p->p_flag & P_CONTROLT) == 0 || 1588 p->p_session->s_ttyp == NULL || 1589 p->p_session->s_ttyvp != NULL) 1590 continue; 1591 } else if ((p->p_flag & P_CONTROLT) == 0 || 1592 p->p_session->s_ttyp == NULL) { 1593 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1594 continue; 1595 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1596 continue; 1597 break; 1598 1599 case KERN_PROC_UID: 1600 if (p->p_ucred->cr_uid != (uid_t)arg) 1601 continue; 1602 break; 1603 1604 case KERN_PROC_RUID: 1605 if (p->p_cred->p_ruid != (uid_t)arg) 1606 continue; 1607 break; 1608 1609 case KERN_PROC_GID: 1610 if (p->p_ucred->cr_gid != (uid_t)arg) 1611 continue; 1612 break; 1613 1614 case KERN_PROC_RGID: 1615 if (p->p_cred->p_rgid != (uid_t)arg) 1616 continue; 1617 break; 1618 1619 case KERN_PROC_ALL: 1620 /* allow everything */ 1621 break; 1622 1623 default: 1624 error = EINVAL; 1625 goto cleanup; 1626 } 1627 if (type == KERN_PROC) { 1628 if (buflen >= sizeof(struct kinfo_proc)) { 1629 fill_eproc(p, &eproc); 1630 error = copyout((caddr_t)p, &dp->kp_proc, 1631 sizeof(struct proc)); 1632 if (error) 1633 goto cleanup; 1634 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1635 sizeof(eproc)); 1636 if (error) 1637 goto cleanup; 1638 dp++; 1639 buflen -= sizeof(struct kinfo_proc); 1640 } 1641 needed += sizeof(struct kinfo_proc); 1642 } else { /* KERN_PROC2 */ 1643 if (buflen >= elem_size && elem_count > 0) { 1644 fill_kproc2(p, &kproc2); 1645 /* 1646 * Copy out elem_size, but not larger than 1647 * the size of a struct kinfo_proc2. 1648 */ 1649 error = copyout(&kproc2, dp2, 1650 min(sizeof(kproc2), elem_size)); 1651 if (error) 1652 goto cleanup; 1653 dp2 += elem_size; 1654 buflen -= elem_size; 1655 elem_count--; 1656 } 1657 needed += elem_size; 1658 } 1659 } 1660 pd++; 1661 if (pd->pd_list != NULL) 1662 goto again; 1663 proclist_unlock_read(); 1664 1665 if (where != NULL) { 1666 if (type == KERN_PROC) 1667 *sizep = (caddr_t)dp - where; 1668 else 1669 *sizep = dp2 - where; 1670 if (needed > *sizep) 1671 return (ENOMEM); 1672 } else { 1673 needed += KERN_PROCSLOP; 1674 *sizep = needed; 1675 } 1676 return (0); 1677 cleanup: 1678 proclist_unlock_read(); 1679 return (error); 1680 } 1681 1682 1683 /* 1684 * try over estimating by 5 LWPs 1685 */ 1686 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1687 1688 static int 1689 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1690 { 1691 struct kinfo_lwp klwp; 1692 struct proc *p; 1693 struct lwp *l; 1694 char *where, *dp; 1695 int type, pid, elem_size, elem_count; 1696 int buflen, needed, error; 1697 1698 dp = where = vwhere; 1699 buflen = where != NULL ? *sizep : 0; 1700 error = needed = 0; 1701 type = name[0]; 1702 1703 if (namelen != 4) 1704 return (EINVAL); 1705 pid = name[1]; 1706 elem_size = name[2]; 1707 elem_count = name[3]; 1708 1709 p = pfind(pid); 1710 if (p == NULL) 1711 return (ESRCH); 1712 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1713 if (buflen >= elem_size && elem_count > 0) { 1714 fill_lwp(l, &klwp); 1715 /* 1716 * Copy out elem_size, but not larger than 1717 * the size of a struct kinfo_proc2. 1718 */ 1719 error = copyout(&klwp, dp, 1720 min(sizeof(klwp), elem_size)); 1721 if (error) 1722 goto cleanup; 1723 dp += elem_size; 1724 buflen -= elem_size; 1725 elem_count--; 1726 } 1727 needed += elem_size; 1728 } 1729 1730 if (where != NULL) { 1731 *sizep = dp - where; 1732 if (needed > *sizep) 1733 return (ENOMEM); 1734 } else { 1735 needed += KERN_PROCSLOP; 1736 *sizep = needed; 1737 } 1738 return (0); 1739 cleanup: 1740 return (error); 1741 } 1742 1743 /* 1744 * Fill in an eproc structure for the specified process. 1745 */ 1746 void 1747 fill_eproc(struct proc *p, struct eproc *ep) 1748 { 1749 struct tty *tp; 1750 struct lwp *l; 1751 1752 ep->e_paddr = p; 1753 ep->e_sess = p->p_session; 1754 ep->e_pcred = *p->p_cred; 1755 ep->e_ucred = *p->p_ucred; 1756 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1757 ep->e_vm.vm_rssize = 0; 1758 ep->e_vm.vm_tsize = 0; 1759 ep->e_vm.vm_dsize = 0; 1760 ep->e_vm.vm_ssize = 0; 1761 /* ep->e_vm.vm_pmap = XXX; */ 1762 } else { 1763 struct vmspace *vm = p->p_vmspace; 1764 1765 ep->e_vm.vm_rssize = vm_resident_count(vm); 1766 ep->e_vm.vm_tsize = vm->vm_tsize; 1767 ep->e_vm.vm_dsize = vm->vm_dsize; 1768 ep->e_vm.vm_ssize = vm->vm_ssize; 1769 1770 /* Pick a "representative" LWP */ 1771 l = proc_representative_lwp(p); 1772 1773 if (l->l_wmesg) 1774 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1775 } 1776 if (p->p_pptr) 1777 ep->e_ppid = p->p_pptr->p_pid; 1778 else 1779 ep->e_ppid = 0; 1780 ep->e_pgid = p->p_pgrp->pg_id; 1781 ep->e_sid = ep->e_sess->s_sid; 1782 ep->e_jobc = p->p_pgrp->pg_jobc; 1783 if ((p->p_flag & P_CONTROLT) && 1784 (tp = ep->e_sess->s_ttyp)) { 1785 ep->e_tdev = tp->t_dev; 1786 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1787 ep->e_tsess = tp->t_session; 1788 } else 1789 ep->e_tdev = NODEV; 1790 1791 ep->e_xsize = ep->e_xrssize = 0; 1792 ep->e_xccount = ep->e_xswrss = 0; 1793 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1794 if (SESS_LEADER(p)) 1795 ep->e_flag |= EPROC_SLEADER; 1796 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1797 } 1798 1799 /* 1800 * Fill in an eproc structure for the specified process. 1801 */ 1802 static void 1803 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1804 { 1805 struct tty *tp; 1806 struct lwp *l; 1807 struct timeval ut, st; 1808 1809 memset(ki, 0, sizeof(*ki)); 1810 1811 ki->p_paddr = PTRTOINT64(p); 1812 ki->p_fd = PTRTOINT64(p->p_fd); 1813 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1814 ki->p_stats = PTRTOINT64(p->p_stats); 1815 ki->p_limit = PTRTOINT64(p->p_limit); 1816 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1817 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1818 ki->p_sess = PTRTOINT64(p->p_session); 1819 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1820 ki->p_ru = PTRTOINT64(p->p_ru); 1821 1822 ki->p_eflag = 0; 1823 ki->p_exitsig = p->p_exitsig; 1824 ki->p_flag = p->p_flag; 1825 1826 ki->p_pid = p->p_pid; 1827 if (p->p_pptr) 1828 ki->p_ppid = p->p_pptr->p_pid; 1829 else 1830 ki->p_ppid = 0; 1831 ki->p_sid = p->p_session->s_sid; 1832 ki->p__pgid = p->p_pgrp->pg_id; 1833 1834 ki->p_tpgid = NO_PGID; /* may be changed if controlling tty below */ 1835 1836 ki->p_uid = p->p_ucred->cr_uid; 1837 ki->p_ruid = p->p_cred->p_ruid; 1838 ki->p_gid = p->p_ucred->cr_gid; 1839 ki->p_rgid = p->p_cred->p_rgid; 1840 ki->p_svuid = p->p_cred->p_svuid; 1841 ki->p_svgid = p->p_cred->p_svgid; 1842 1843 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1844 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1845 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1846 1847 ki->p_jobc = p->p_pgrp->pg_jobc; 1848 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1849 ki->p_tdev = tp->t_dev; 1850 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1851 ki->p_tsess = PTRTOINT64(tp->t_session); 1852 } else { 1853 ki->p_tdev = NODEV; 1854 } 1855 1856 ki->p_estcpu = p->p_estcpu; 1857 ki->p_rtime_sec = p->p_rtime.tv_sec; 1858 ki->p_rtime_usec = p->p_rtime.tv_usec; 1859 ki->p_cpticks = p->p_cpticks; 1860 ki->p_pctcpu = p->p_pctcpu; 1861 1862 ki->p_uticks = p->p_uticks; 1863 ki->p_sticks = p->p_sticks; 1864 ki->p_iticks = p->p_iticks; 1865 1866 ki->p_tracep = PTRTOINT64(p->p_tracep); 1867 ki->p_traceflag = p->p_traceflag; 1868 1869 1870 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1871 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1872 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1873 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1874 1875 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1876 ki->p_realstat = p->p_stat; 1877 ki->p_nice = p->p_nice; 1878 1879 ki->p_xstat = p->p_xstat; 1880 ki->p_acflag = p->p_acflag; 1881 1882 strncpy(ki->p_comm, p->p_comm, 1883 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1884 1885 strncpy(ki->p_login, p->p_session->s_login, 1886 min(sizeof ki->p_login - 1, sizeof p->p_session->s_login)); 1887 1888 ki->p_nlwps = p->p_nlwps; 1889 ki->p_nrlwps = p->p_nrlwps; 1890 ki->p_realflag = p->p_flag; 1891 1892 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1893 ki->p_vm_rssize = 0; 1894 ki->p_vm_tsize = 0; 1895 ki->p_vm_dsize = 0; 1896 ki->p_vm_ssize = 0; 1897 l = NULL; 1898 } else { 1899 struct vmspace *vm = p->p_vmspace; 1900 1901 ki->p_vm_rssize = vm_resident_count(vm); 1902 ki->p_vm_tsize = vm->vm_tsize; 1903 ki->p_vm_dsize = vm->vm_dsize; 1904 ki->p_vm_ssize = vm->vm_ssize; 1905 1906 /* Pick a "representative" LWP */ 1907 l = proc_representative_lwp(p); 1908 ki->p_forw = PTRTOINT64(l->l_forw); 1909 ki->p_back = PTRTOINT64(l->l_back); 1910 ki->p_addr = PTRTOINT64(l->l_addr); 1911 ki->p_stat = l->l_stat; 1912 ki->p_flag |= l->l_flag; 1913 ki->p_swtime = l->l_swtime; 1914 ki->p_slptime = l->l_slptime; 1915 if (l->l_stat == LSONPROC) { 1916 KDASSERT(l->l_cpu != NULL); 1917 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1918 } else 1919 ki->p_schedflags = 0; 1920 ki->p_holdcnt = l->l_holdcnt; 1921 ki->p_priority = l->l_priority; 1922 ki->p_usrpri = l->l_usrpri; 1923 if (l->l_wmesg) 1924 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1925 ki->p_wchan = PTRTOINT64(l->l_wchan); 1926 1927 } 1928 1929 if (p->p_session->s_ttyvp) 1930 ki->p_eflag |= EPROC_CTTY; 1931 if (SESS_LEADER(p)) 1932 ki->p_eflag |= EPROC_SLEADER; 1933 1934 /* XXX Is this double check necessary? */ 1935 if (P_ZOMBIE(p)) { 1936 ki->p_uvalid = 0; 1937 } else { 1938 ki->p_uvalid = 1; 1939 1940 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1941 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1942 1943 calcru(p, &ut, &st, 0); 1944 ki->p_uutime_sec = ut.tv_sec; 1945 ki->p_uutime_usec = ut.tv_usec; 1946 ki->p_ustime_sec = st.tv_sec; 1947 ki->p_ustime_usec = st.tv_usec; 1948 1949 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1950 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1951 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1952 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1953 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1954 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1955 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1956 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1957 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1958 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1959 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1960 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1961 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1962 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1963 1964 timeradd(&p->p_stats->p_cru.ru_utime, 1965 &p->p_stats->p_cru.ru_stime, &ut); 1966 ki->p_uctime_sec = ut.tv_sec; 1967 ki->p_uctime_usec = ut.tv_usec; 1968 } 1969 #ifdef MULTIPROCESSOR 1970 if (l && l->l_cpu != NULL) 1971 ki->p_cpuid = l->l_cpu->ci_cpuid; 1972 else 1973 #endif 1974 ki->p_cpuid = KI_NOCPU; 1975 1976 } 1977 1978 /* 1979 * Fill in a kinfo_lwp structure for the specified lwp. 1980 */ 1981 static void 1982 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1983 { 1984 1985 kl->l_forw = PTRTOINT64(l->l_forw); 1986 kl->l_back = PTRTOINT64(l->l_back); 1987 kl->l_laddr = PTRTOINT64(l); 1988 kl->l_addr = PTRTOINT64(l->l_addr); 1989 kl->l_stat = l->l_stat; 1990 kl->l_lid = l->l_lid; 1991 kl->l_flag = l->l_flag; 1992 1993 kl->l_swtime = l->l_swtime; 1994 kl->l_slptime = l->l_slptime; 1995 if (l->l_stat == LSONPROC) { 1996 KDASSERT(l->l_cpu != NULL); 1997 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1998 } else 1999 kl->l_schedflags = 0; 2000 kl->l_holdcnt = l->l_holdcnt; 2001 kl->l_priority = l->l_priority; 2002 kl->l_usrpri = l->l_usrpri; 2003 if (l->l_wmesg) 2004 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 2005 kl->l_wchan = PTRTOINT64(l->l_wchan); 2006 #ifdef MULTIPROCESSOR 2007 if (l->l_cpu != NULL) 2008 kl->l_cpuid = l->l_cpu->ci_cpuid; 2009 else 2010 #endif 2011 kl->l_cpuid = KI_NOCPU; 2012 } 2013 2014 int 2015 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 2016 struct proc *up) 2017 { 2018 struct ps_strings pss; 2019 struct proc *p; 2020 size_t len, upper_bound, xlen, i; 2021 struct uio auio; 2022 struct iovec aiov; 2023 vaddr_t argv; 2024 pid_t pid; 2025 int nargv, type, error; 2026 char *arg; 2027 char *tmp; 2028 2029 if (namelen != 2) 2030 return (EINVAL); 2031 pid = name[0]; 2032 type = name[1]; 2033 2034 switch (type) { 2035 case KERN_PROC_ARGV: 2036 case KERN_PROC_NARGV: 2037 case KERN_PROC_ENV: 2038 case KERN_PROC_NENV: 2039 /* ok */ 2040 break; 2041 default: 2042 return (EINVAL); 2043 } 2044 2045 /* check pid */ 2046 if ((p = pfind(pid)) == NULL) 2047 return (EINVAL); 2048 2049 /* only root or same user change look at the environment */ 2050 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 2051 if (up->p_ucred->cr_uid != 0) { 2052 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 2053 up->p_cred->p_ruid != p->p_cred->p_svuid) 2054 return (EPERM); 2055 } 2056 } 2057 2058 if (sizep != NULL && where == NULL) { 2059 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 2060 *sizep = sizeof (int); 2061 else 2062 *sizep = ARG_MAX; /* XXX XXX XXX */ 2063 return (0); 2064 } 2065 if (where == NULL || sizep == NULL) 2066 return (EINVAL); 2067 2068 /* 2069 * Zombies don't have a stack, so we can't read their psstrings. 2070 * System processes also don't have a user stack. 2071 */ 2072 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 2073 return (EINVAL); 2074 2075 /* 2076 * Lock the process down in memory. 2077 */ 2078 /* XXXCDC: how should locking work here? */ 2079 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 2080 return (EFAULT); 2081 2082 p->p_vmspace->vm_refcnt++; /* XXX */ 2083 2084 /* 2085 * Allocate a temporary buffer to hold the arguments. 2086 */ 2087 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2088 2089 /* 2090 * Read in the ps_strings structure. 2091 */ 2092 aiov.iov_base = &pss; 2093 aiov.iov_len = sizeof(pss); 2094 auio.uio_iov = &aiov; 2095 auio.uio_iovcnt = 1; 2096 auio.uio_offset = (vaddr_t)p->p_psstr; 2097 auio.uio_resid = sizeof(pss); 2098 auio.uio_segflg = UIO_SYSSPACE; 2099 auio.uio_rw = UIO_READ; 2100 auio.uio_procp = NULL; 2101 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2102 if (error) 2103 goto done; 2104 2105 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2106 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2107 else 2108 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2109 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2110 error = copyout(&nargv, where, sizeof(nargv)); 2111 *sizep = sizeof(nargv); 2112 goto done; 2113 } 2114 /* 2115 * Now read the address of the argument vector. 2116 */ 2117 switch (type) { 2118 case KERN_PROC_ARGV: 2119 /* XXX compat32 stuff here */ 2120 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2121 break; 2122 case KERN_PROC_ENV: 2123 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2124 break; 2125 default: 2126 return (EINVAL); 2127 } 2128 auio.uio_offset = (off_t)(long)tmp; 2129 aiov.iov_base = &argv; 2130 aiov.iov_len = sizeof(argv); 2131 auio.uio_iov = &aiov; 2132 auio.uio_iovcnt = 1; 2133 auio.uio_resid = sizeof(argv); 2134 auio.uio_segflg = UIO_SYSSPACE; 2135 auio.uio_rw = UIO_READ; 2136 auio.uio_procp = NULL; 2137 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2138 if (error) 2139 goto done; 2140 2141 /* 2142 * Now copy in the actual argument vector, one page at a time, 2143 * since we don't know how long the vector is (though, we do 2144 * know how many NUL-terminated strings are in the vector). 2145 */ 2146 len = 0; 2147 upper_bound = *sizep; 2148 for (; nargv != 0 && len < upper_bound; len += xlen) { 2149 aiov.iov_base = arg; 2150 aiov.iov_len = PAGE_SIZE; 2151 auio.uio_iov = &aiov; 2152 auio.uio_iovcnt = 1; 2153 auio.uio_offset = argv + len; 2154 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2155 auio.uio_resid = xlen; 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 for (i = 0; i < xlen && nargv != 0; i++) { 2164 if (arg[i] == '\0') 2165 nargv--; /* one full string */ 2166 } 2167 2168 /* 2169 * Make sure we don't copyout past the end of the user's 2170 * buffer. 2171 */ 2172 if (len + i > upper_bound) 2173 i = upper_bound - len; 2174 2175 error = copyout(arg, (char *)where + len, i); 2176 if (error) 2177 break; 2178 2179 if (nargv == 0) { 2180 len += i; 2181 break; 2182 } 2183 } 2184 *sizep = len; 2185 2186 done: 2187 uvmspace_free(p->p_vmspace); 2188 2189 free(arg, M_TEMP); 2190 return (error); 2191 } 2192 2193 #if NPTY > 0 2194 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2195 2196 /* 2197 * Validate parameters and get old / set new parameters 2198 * for pty sysctl function. 2199 */ 2200 static int 2201 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2202 { 2203 int error = 0; 2204 int oldmax = 0, newmax = 0; 2205 2206 /* get current value of maxptys */ 2207 oldmax = pty_maxptys(0, 0); 2208 2209 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2210 2211 if (!error && newp) { 2212 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2213 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2214 2215 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2216 return (EINVAL); 2217 2218 } 2219 2220 return (error); 2221 } 2222 #endif /* NPTY > 0 */ 2223 2224 static int 2225 sysctl_dotkstat(int *name, u_int namelen, void *where, size_t *sizep, 2226 void *newp) 2227 { 2228 2229 /* all sysctl names at this level are terminal */ 2230 if (namelen != 1) 2231 return (ENOTDIR); /* overloaded */ 2232 2233 switch (name[0]) { 2234 case KERN_TKSTAT_NIN: 2235 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2236 case KERN_TKSTAT_NOUT: 2237 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2238 case KERN_TKSTAT_CANCC: 2239 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2240 case KERN_TKSTAT_RAWCC: 2241 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2242 default: 2243 return (EOPNOTSUPP); 2244 } 2245 } 2246
Indexes created Tue Sep 30 07:10:03 GMT 2025