kern_sysctl.c revision 1.152
1 /* $NetBSD: kern_sysctl.c,v 1.152 2003/10/31 03:32:20 simonb 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 1.152 2003/10/31 03:32:20 simonb 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_posix.h" 50 #include "opt_sysv.h" 51 #include "pty.h" 52 #include "rnd.h" 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/kernel.h> 57 #include <sys/buf.h> 58 #include <sys/device.h> 59 #include <sys/disklabel.h> 60 #include <sys/dkstat.h> 61 #include <sys/exec.h> 62 #include <sys/file.h> 63 #include <sys/ioctl.h> 64 #include <sys/malloc.h> 65 #include <sys/mount.h> 66 #include <sys/msgbuf.h> 67 #include <sys/pool.h> 68 #include <sys/proc.h> 69 #include <sys/resource.h> 70 #include <sys/resourcevar.h> 71 #include <sys/sa.h> 72 #include <sys/syscallargs.h> 73 #include <sys/tty.h> 74 #include <sys/unistd.h> 75 #include <sys/vnode.h> 76 #include <sys/socketvar.h> 77 #define __SYSCTL_PRIVATE 78 #include <sys/sysctl.h> 79 #include <sys/lock.h> 80 #include <sys/namei.h> 81 #include <sys/conf.h> 82 83 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 84 #include <sys/ipc.h> 85 #endif 86 #ifdef SYSVMSG 87 #include <sys/msg.h> 88 #endif 89 #ifdef SYSVSEM 90 #include <sys/sem.h> 91 #endif 92 #ifdef SYSVSHM 93 #include <sys/shm.h> 94 #endif 95 96 #include <dev/cons.h> 97 98 #if defined(DDB) 99 #include <ddb/ddbvar.h> 100 #endif 101 102 #ifndef PIPE_SOCKETPAIR 103 #include <sys/pipe.h> 104 #endif 105 106 #if NRND > 0 107 #include <sys/rnd.h> 108 #endif 109 110 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 111 112 static int sysctl_file(void *, size_t *); 113 static int sysctl_drivers(void *, size_t *); 114 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 115 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 116 #endif 117 static int sysctl_msgbuf(void *, size_t *); 118 static int sysctl_doeproc(int *, u_int, void *, size_t *); 119 static int sysctl_dolwp(int *, u_int, void *, size_t *); 120 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 121 #ifdef MULTIPROCESSOR 122 static int sysctl_docptime(void *, size_t *, void *); 123 static int sysctl_ncpus(void); 124 #endif 125 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 126 static void fill_lwp(struct lwp *, struct kinfo_lwp *); 127 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 128 #if NPTY > 0 129 static int sysctl_pty(void *, size_t *, void *, size_t); 130 #endif 131 132 /* 133 * The `sysctl_memlock' is intended to keep too many processes from 134 * locking down memory by doing sysctls at once. Whether or not this 135 * is really a good idea to worry about it probably a subject of some 136 * debate. 137 */ 138 struct lock sysctl_memlock; 139 140 void 141 sysctl_init(void) 142 { 143 144 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 145 } 146 147 int 148 sys___sysctl(struct lwp *l, void *v, register_t *retval) 149 { 150 struct sys___sysctl_args /* { 151 syscallarg(int *) name; 152 syscallarg(u_int) namelen; 153 syscallarg(void *) old; 154 syscallarg(size_t *) oldlenp; 155 syscallarg(void *) new; 156 syscallarg(size_t) newlen; 157 } */ *uap = v; 158 struct proc *p = l->l_proc; 159 int error; 160 size_t savelen = 0, oldlen = 0; 161 sysctlfn *fn; 162 int name[CTL_MAXNAME]; 163 164 /* 165 * all top-level sysctl names are non-terminal 166 */ 167 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 168 return (EINVAL); 169 error = copyin(SCARG(uap, name), &name, 170 SCARG(uap, namelen) * sizeof(int)); 171 if (error) 172 return (error); 173 174 /* 175 * For all but CTL_PROC, must be root to change a value. 176 * For CTL_PROC, must be root, or owner of the proc (and not suid), 177 * this is checked in proc_sysctl() (once we know the targer proc). 178 */ 179 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 180 (error = suser(p->p_ucred, &p->p_acflag))) 181 return (error); 182 183 switch (name[0]) { 184 case CTL_KERN: 185 fn = kern_sysctl; 186 break; 187 case CTL_HW: 188 fn = hw_sysctl; 189 break; 190 case CTL_VM: 191 fn = uvm_sysctl; 192 break; 193 case CTL_NET: 194 fn = net_sysctl; 195 break; 196 case CTL_VFS: 197 fn = vfs_sysctl; 198 break; 199 case CTL_MACHDEP: 200 fn = cpu_sysctl; 201 break; 202 #ifdef DEBUG 203 case CTL_DEBUG: 204 fn = debug_sysctl; 205 break; 206 #endif 207 #ifdef DDB 208 case CTL_DDB: 209 fn = ddb_sysctl; 210 break; 211 #endif 212 case CTL_PROC: 213 fn = proc_sysctl; 214 break; 215 216 case CTL_EMUL: 217 fn = emul_sysctl; 218 break; 219 default: 220 return (EOPNOTSUPP); 221 } 222 223 /* 224 * XXX Hey, we wire `old', but what about `new'? 225 */ 226 227 if (SCARG(uap, oldlenp)) { 228 if ((error = copyin(SCARG(uap, oldlenp), &oldlen, 229 sizeof(oldlen)))) 230 return (error); 231 } 232 if (SCARG(uap, old) != NULL) { 233 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 234 if (error) 235 return (error); 236 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 237 if (error) { 238 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 239 return (error); 240 } 241 savelen = oldlen; 242 } 243 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 244 &oldlen, SCARG(uap, new), SCARG(uap, newlen), p); 245 if (SCARG(uap, old) != NULL) { 246 uvm_vsunlock(p, SCARG(uap, old), savelen); 247 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 248 } 249 if (error) 250 return (error); 251 if (SCARG(uap, oldlenp)) 252 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 253 return (error); 254 } 255 256 /* 257 * Attributes stored in the kernel. 258 */ 259 char hostname[MAXHOSTNAMELEN]; 260 int hostnamelen; 261 262 char domainname[MAXHOSTNAMELEN]; 263 int domainnamelen; 264 265 long hostid; 266 267 #ifdef INSECURE 268 int securelevel = -1; 269 #else 270 int securelevel = 0; 271 #endif 272 273 #ifndef DEFCORENAME 274 #define DEFCORENAME "%n.core" 275 #endif 276 char defcorename[MAXPATHLEN] = DEFCORENAME; 277 278 extern int kern_logsigexit; 279 extern fixpt_t ccpu; 280 extern int forkfsleep; 281 extern int dumponpanic; 282 283 #ifndef MULTIPROCESSOR 284 #define sysctl_ncpus() 1 285 #endif 286 287 #ifdef MULTIPROCESSOR 288 289 #ifndef CPU_INFO_FOREACH 290 #define CPU_INFO_ITERATOR int 291 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 292 #endif 293 294 static int 295 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 296 { 297 u_int64_t cp_time[CPUSTATES]; 298 struct cpu_info *ci; 299 CPU_INFO_ITERATOR cii; 300 int ncpus = sysctl_ncpus(); 301 302 if (*oldlenp == sizeof(cp_time)) { 303 size_t i; 304 305 for (i = 0; i < CPUSTATES; i++) 306 cp_time[i] = 0; 307 308 for (CPU_INFO_FOREACH(cii, ci)) { 309 for (i = 0; i < CPUSTATES; i++) 310 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 311 } 312 return sysctl_rdstruct(oldp, oldlenp, newp, 313 cp_time, sizeof(cp_time)); 314 } else if (*oldlenp == sizeof(cp_time) * ncpus) { 315 int error; 316 317 for (CPU_INFO_FOREACH(cii, ci)) { 318 if ((error = sysctl_rdstruct(oldp, oldlenp, newp, 319 ci->ci_schedstate.spc_cp_time, 320 sizeof(ci->ci_schedstate.spc_cp_time))) != 0) 321 return error; 322 oldp = ((char *)oldp) + sizeof(cp_time); 323 } 324 *oldlenp = ncpus * sizeof(cp_time); 325 return 0; 326 } else 327 return EINVAL; 328 } 329 330 static int 331 sysctl_ncpus(void) 332 { 333 struct cpu_info *ci; 334 CPU_INFO_ITERATOR cii; 335 336 int ncpus = 0; 337 for (CPU_INFO_FOREACH(cii, ci)) 338 ncpus++; 339 return (ncpus); 340 } 341 342 #endif 343 344 /* 345 * kernel related system variables. 346 */ 347 int 348 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 349 void *newp, size_t newlen, struct proc *p) 350 { 351 int error, level, inthostid; 352 int old_autonicetime; 353 int old_vnodes; 354 dev_t consdev; 355 #if NRND > 0 356 int v; 357 #endif 358 359 /* All sysctl names at this level, except for a few, are terminal. */ 360 switch (name[0]) { 361 case KERN_PROC: 362 case KERN_PROC2: 363 case KERN_LWP: 364 case KERN_PROF: 365 case KERN_MBUF: 366 case KERN_PROC_ARGS: 367 case KERN_SYSVIPC_INFO: 368 case KERN_PIPE: 369 case KERN_TKSTAT: 370 /* Not terminal. */ 371 break; 372 default: 373 if (namelen != 1) 374 return (ENOTDIR); /* overloaded */ 375 } 376 377 switch (name[0]) { 378 case KERN_OSTYPE: 379 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 380 case KERN_OSRELEASE: 381 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 382 case KERN_OSREV: 383 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 384 case KERN_VERSION: 385 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 386 case KERN_MAXVNODES: 387 old_vnodes = desiredvnodes; 388 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 389 if (newp && !error) { 390 if (old_vnodes > desiredvnodes) { 391 error = vfs_drainvnodes(desiredvnodes, p); 392 if (error) { 393 desiredvnodes = old_vnodes; 394 return error; 395 } 396 } 397 vfs_reinit(); 398 nchreinit(); 399 } 400 return (error); 401 case KERN_MAXPROC: 402 { 403 int nmaxproc = maxproc; 404 405 error = sysctl_int(oldp, oldlenp, newp, newlen, &nmaxproc); 406 407 if (!error && newp) { 408 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 409 return (EINVAL); 410 411 #ifdef __HAVE_CPU_MAXPROC 412 if (nmaxproc > cpu_maxproc()) 413 return (EINVAL); 414 #endif 415 maxproc = nmaxproc; 416 } 417 418 return (error); 419 } 420 case KERN_MAXFILES: 421 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 422 case KERN_ARGMAX: 423 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 424 case KERN_SECURELVL: 425 level = securelevel; 426 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 427 newp == NULL) 428 return (error); 429 if (level < securelevel && p->p_pid != 1) 430 return (EPERM); 431 securelevel = level; 432 return (0); 433 case KERN_HOSTNAME: 434 error = sysctl_string(oldp, oldlenp, newp, newlen, 435 hostname, sizeof(hostname)); 436 if (newp && !error) 437 hostnamelen = newlen; 438 return (error); 439 case KERN_DOMAINNAME: 440 error = sysctl_string(oldp, oldlenp, newp, newlen, 441 domainname, sizeof(domainname)); 442 if (newp && !error) 443 domainnamelen = newlen; 444 return (error); 445 case KERN_HOSTID: 446 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 447 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 448 if (newp && !error) 449 hostid = inthostid; 450 return (error); 451 case KERN_CLOCKRATE: 452 return (sysctl_clockrate(oldp, oldlenp)); 453 case KERN_BOOTTIME: 454 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 455 sizeof(struct timeval))); 456 case KERN_VNODE: 457 return (sysctl_vnode(oldp, oldlenp, p)); 458 case KERN_PROC: 459 case KERN_PROC2: 460 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 461 case KERN_LWP: 462 return (sysctl_dolwp(name, namelen, oldp, oldlenp)); 463 case KERN_PROC_ARGS: 464 return (sysctl_procargs(name + 1, namelen - 1, 465 oldp, oldlenp, p)); 466 case KERN_FILE: 467 return (sysctl_file(oldp, oldlenp)); 468 #ifdef GPROF 469 case KERN_PROF: 470 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 471 newp, newlen)); 472 #endif 473 case KERN_POSIX1: 474 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 475 case KERN_NGROUPS: 476 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 477 case KERN_JOB_CONTROL: 478 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 479 case KERN_SAVED_IDS: 480 #ifdef _POSIX_SAVED_IDS 481 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 482 #else 483 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 484 #endif 485 case KERN_MAXPARTITIONS: 486 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 487 case KERN_RAWPARTITION: 488 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 489 #ifdef NTP 490 case KERN_NTPTIME: 491 return (sysctl_ntptime(oldp, oldlenp)); 492 #endif 493 case KERN_AUTONICETIME: 494 old_autonicetime = autonicetime; 495 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 496 if (autonicetime < 0) 497 autonicetime = old_autonicetime; 498 return (error); 499 case KERN_AUTONICEVAL: 500 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 501 if (autoniceval < PRIO_MIN) 502 autoniceval = PRIO_MIN; 503 if (autoniceval > PRIO_MAX) 504 autoniceval = PRIO_MAX; 505 return (error); 506 case KERN_RTC_OFFSET: 507 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 508 case KERN_ROOT_DEVICE: 509 return (sysctl_rdstring(oldp, oldlenp, newp, 510 root_device->dv_xname)); 511 case KERN_ROOT_PARTITION: 512 return (sysctl_rdint(oldp, oldlenp, newp, DISKPART(rootdev))); 513 case KERN_MSGBUFSIZE: 514 /* 515 * deal with cases where the message buffer has 516 * become corrupted. 517 */ 518 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 519 msgbufenabled = 0; 520 return (ENXIO); 521 } 522 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 523 case KERN_FSYNC: 524 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 525 case KERN_SYSVMSG: 526 #ifdef SYSVMSG 527 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 528 #else 529 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 530 #endif 531 case KERN_SYSVSEM: 532 #ifdef SYSVSEM 533 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 534 #else 535 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 536 #endif 537 case KERN_SYSVSHM: 538 #ifdef SYSVSHM 539 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 540 #else 541 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 542 #endif 543 case KERN_DEFCORENAME: 544 if (newp && newlen < 1) 545 return (EINVAL); 546 error = sysctl_string(oldp, oldlenp, newp, newlen, 547 defcorename, sizeof(defcorename)); 548 return (error); 549 case KERN_SYNCHRONIZED_IO: 550 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 551 case KERN_IOV_MAX: 552 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 553 case KERN_MBUF: 554 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 555 newp, newlen)); 556 case KERN_MAPPED_FILES: 557 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 558 case KERN_MEMLOCK: 559 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 560 case KERN_MEMLOCK_RANGE: 561 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 562 case KERN_MEMORY_PROTECTION: 563 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 564 case KERN_LOGIN_NAME_MAX: 565 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 566 case KERN_LOGSIGEXIT: 567 return (sysctl_int(oldp, oldlenp, newp, newlen, 568 &kern_logsigexit)); 569 case KERN_FSCALE: 570 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 571 case KERN_CCPU: 572 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 573 case KERN_CP_TIME: 574 #ifndef MULTIPROCESSOR 575 return (sysctl_rdstruct(oldp, oldlenp, newp, 576 curcpu()->ci_schedstate.spc_cp_time, 577 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 578 #else 579 return (sysctl_docptime(oldp, oldlenp, newp)); 580 #endif 581 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 582 case KERN_SYSVIPC_INFO: 583 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 584 #endif 585 case KERN_MSGBUF: 586 return (sysctl_msgbuf(oldp, oldlenp)); 587 case KERN_CONSDEV: 588 if (cn_tab != NULL) 589 consdev = cn_tab->cn_dev; 590 else 591 consdev = NODEV; 592 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 593 sizeof consdev)); 594 #if NPTY > 0 595 case KERN_MAXPTYS: 596 return (sysctl_pty(oldp, oldlenp, newp, newlen)); 597 #endif 598 #ifndef PIPE_SOCKETPAIR 599 case KERN_PIPE: 600 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 601 newp, newlen)); 602 #endif 603 case KERN_MAXPHYS: 604 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 605 case KERN_SOMAXKVA: 606 { 607 int new_somaxkva = somaxkva; 608 609 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_somaxkva); 610 if (newp && !error) { 611 if (new_somaxkva < (16 * 1024 * 1024)) /* sanity */ 612 return (EINVAL); 613 somaxkva = new_somaxkva; 614 } 615 return (error); 616 } 617 case KERN_SBMAX: 618 { 619 int new_sbmax = sb_max; 620 621 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 622 if (newp && error == 0) 623 error = sb_max_set(new_sbmax); 624 return (error); 625 } 626 case KERN_TKSTAT: 627 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 628 newp)); 629 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 630 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 631 case KERN_URND: 632 #if NRND > 0 633 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 634 sizeof(v)) 635 return (sysctl_rdint(oldp, oldlenp, newp, v)); 636 else 637 return (EIO); /*XXX*/ 638 #else 639 return (EOPNOTSUPP); 640 #endif 641 case KERN_LABELSECTOR: 642 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 643 case KERN_LABELOFFSET: 644 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 645 case KERN_FORKFSLEEP: 646 { 647 /* userland sees value in ms, internally is in ticks */ 648 int timo, lsleep = forkfsleep * 1000 / hz; 649 650 error = sysctl_int(oldp, oldlenp, newp, newlen, &lsleep); 651 if (newp && !error) { 652 /* refuse negative values, and overly 'long time' */ 653 if (lsleep < 0 || lsleep > MAXSLP * 1000) 654 return (EINVAL); 655 656 timo = mstohz(lsleep); 657 658 /* if the interval is >0 ms && <1 tick, use 1 tick */ 659 if (lsleep != 0 && timo == 0) 660 forkfsleep = 1; 661 else 662 forkfsleep = timo; 663 } 664 return (error); 665 } 666 case KERN_POSIX_THREADS: /* XXX _POSIX_VERSION */ 667 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 668 case KERN_POSIX_SEMAPHORES: /* XXX _POSIX_VERSION */ 669 #ifdef P1003_1B_SEMAPHORE 670 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 671 #else 672 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 673 #endif 674 case KERN_POSIX_BARRIERS: /* XXX _POSIX_VERSION */ 675 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 676 case KERN_POSIX_TIMERS: /* XXX _POSIX_VERSION */ 677 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 678 case KERN_POSIX_SPIN_LOCKS: /* XXX _POSIX_VERSION */ 679 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 680 case KERN_POSIX_READER_WRITER_LOCKS: /* XXX _POSIX_VERSION */ 681 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 682 case KERN_DUMP_ON_PANIC: 683 return (sysctl_int(oldp, oldlenp, newp, newlen, &dumponpanic)); 684 685 case KERN_DRIVERS: 686 return (sysctl_drivers(oldp, oldlenp)); 687 688 default: 689 return (EOPNOTSUPP); 690 } 691 /* NOTREACHED */ 692 } 693 694 /* 695 * hardware related system variables. 696 */ 697 int 698 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 699 void *newp, size_t newlen, struct proc *p) 700 { 701 702 /* All sysctl names at this level, except for a few, are terminal. */ 703 switch (name[0]) { 704 case HW_DISKSTATS: 705 /* Not terminal. */ 706 break; 707 default: 708 if (namelen != 1) 709 return (ENOTDIR); /* overloaded */ 710 } 711 712 switch (name[0]) { 713 case HW_MACHINE: 714 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 715 case HW_MACHINE_ARCH: 716 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 717 case HW_MODEL: 718 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 719 case HW_NCPU: 720 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 721 case HW_BYTEORDER: 722 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 723 case HW_PHYSMEM: 724 { 725 u_int rval; 726 727 if ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) 728 rval = UINT_MAX; 729 else 730 rval = physmem * PAGE_SIZE; 731 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 732 } 733 case HW_PHYSMEM64: 734 return (sysctl_rdquad(oldp, oldlenp, newp, 735 (u_quad_t)physmem * PAGE_SIZE)); 736 case HW_USERMEM: 737 { 738 u_int rval; 739 740 if ((u_int)(physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 741 rval = UINT_MAX; 742 else 743 rval = (physmem - uvmexp.wired) * PAGE_SIZE; 744 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 745 } 746 case HW_USERMEM64: 747 return (sysctl_rdquad(oldp, oldlenp, newp, 748 (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE)); 749 case HW_PAGESIZE: 750 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 751 case HW_ALIGNBYTES: 752 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 753 case HW_DISKNAMES: 754 return (sysctl_disknames(oldp, oldlenp)); 755 case HW_DISKSTATS: 756 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 757 case HW_CNMAGIC: { 758 char magic[CNS_LEN]; 759 int error; 760 761 if (oldp) 762 cn_get_magic(magic, CNS_LEN); 763 error = sysctl_string(oldp, oldlenp, newp, newlen, 764 magic, sizeof(magic)); 765 if (newp && !error) { 766 error = cn_set_magic(magic); 767 } 768 return (error); 769 } 770 default: 771 return (EOPNOTSUPP); 772 } 773 /* NOTREACHED */ 774 } 775 776 #ifdef DEBUG 777 /* 778 * Debugging related system variables. 779 */ 780 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 781 struct ctldebug debug5, debug6, debug7, debug8, debug9; 782 struct ctldebug debug10, debug11, debug12, debug13, debug14; 783 struct ctldebug debug15, debug16, debug17, debug18, debug19; 784 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 785 &debug0, &debug1, &debug2, &debug3, &debug4, 786 &debug5, &debug6, &debug7, &debug8, &debug9, 787 &debug10, &debug11, &debug12, &debug13, &debug14, 788 &debug15, &debug16, &debug17, &debug18, &debug19, 789 }; 790 791 int 792 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 793 void *newp, size_t newlen, struct proc *p) 794 { 795 struct ctldebug *cdp; 796 797 /* all sysctl names at this level are name and field */ 798 if (namelen != 2) 799 return (ENOTDIR); /* overloaded */ 800 if (name[0] < 0 || name[0] >= CTL_DEBUG_MAXID) 801 return (EOPNOTSUPP); 802 cdp = debugvars[name[0]]; 803 if (cdp->debugname == 0) 804 return (EOPNOTSUPP); 805 switch (name[1]) { 806 case CTL_DEBUG_NAME: 807 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 808 case CTL_DEBUG_VALUE: 809 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 810 default: 811 return (EOPNOTSUPP); 812 } 813 /* NOTREACHED */ 814 } 815 #endif /* DEBUG */ 816 817 int 818 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 819 void *newp, size_t newlen, struct proc *p) 820 { 821 struct proc *ptmp = NULL; 822 int error = 0; 823 struct rlimit alim; 824 struct plimit *newplim; 825 char *tmps = NULL; 826 size_t len, curlen; 827 u_int i; 828 int si; 829 830 if (namelen < 2) 831 return (EINVAL); 832 833 if (name[0] == PROC_CURPROC) { 834 ptmp = p; 835 } else if ((ptmp = pfind((pid_t)name[0])) == NULL) { 836 return (ESRCH); 837 } else { 838 if (p->p_ucred->cr_uid != 0) { 839 if (p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 840 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 841 return (EPERM); 842 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 843 return (EPERM); /* sgid proc */ 844 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 845 if (p->p_ucred->cr_groups[i] == 846 ptmp->p_cred->p_rgid) 847 break; 848 } 849 if (i == p->p_ucred->cr_ngroups) 850 return (EPERM); 851 } 852 } 853 switch (name[1]) { 854 case PROC_PID_STOPFORK: 855 if (namelen != 2) 856 return (EINVAL); 857 si = ((ptmp->p_flag & P_STOPFORK) != 0); 858 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &si)) != 0) 859 return (error); 860 if (si != 0) 861 ptmp->p_flag |= P_STOPFORK; 862 else 863 ptmp->p_flag &= ~P_STOPFORK; 864 return (0); 865 866 case PROC_PID_STOPEXEC: 867 if (namelen != 2) 868 return (EINVAL); 869 si = ((ptmp->p_flag & P_STOPEXEC) != 0); 870 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &si)) != 0) 871 return (error); 872 if (si != 0) 873 ptmp->p_flag |= P_STOPEXEC; 874 else 875 ptmp->p_flag &= ~P_STOPEXEC; 876 return (0); 877 878 case PROC_PID_CORENAME: 879 if (namelen != 2) 880 return (EINVAL); 881 /* 882 * Can't use sysctl_string() here because we may malloc a new 883 * area during the process, so we have to do it by hand. 884 */ 885 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 886 if (oldlenp && *oldlenp < curlen) { 887 if (!oldp) 888 *oldlenp = curlen; 889 return (ENOMEM); 890 } 891 if (newp) { 892 if (securelevel > 2) 893 return (EPERM); 894 if (newlen > MAXPATHLEN) 895 return (ENAMETOOLONG); 896 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 897 if (tmps == NULL) 898 return (ENOMEM); 899 error = copyin(newp, tmps, newlen + 1); 900 tmps[newlen] = '\0'; 901 if (error) 902 goto cleanup; 903 /* Enforce to be either 'core' for end with '.core' */ 904 if (newlen < 4) { /* c.o.r.e */ 905 error = EINVAL; 906 goto cleanup; 907 } 908 len = newlen - 4; 909 if (len > 0) { 910 if (tmps[len - 1] != '.' && 911 tmps[len - 1] != '/') { 912 error = EINVAL; 913 goto cleanup; 914 } 915 } 916 if (strcmp(&tmps[len], "core") != 0) { 917 error = EINVAL; 918 goto cleanup; 919 } 920 } 921 if (oldp && oldlenp) { 922 *oldlenp = curlen; 923 error = copyout(ptmp->p_limit->pl_corename, oldp, 924 curlen); 925 } 926 if (newp && error == 0) { 927 /* if the 2 strings are identical, don't limcopy() */ 928 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 929 error = 0; 930 goto cleanup; 931 } 932 if (ptmp->p_limit->p_refcnt > 1 && 933 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 934 newplim = limcopy(ptmp->p_limit); 935 limfree(ptmp->p_limit); 936 ptmp->p_limit = newplim; 937 } 938 if (ptmp->p_limit->pl_corename != defcorename) { 939 free(ptmp->p_limit->pl_corename, M_TEMP); 940 } 941 ptmp->p_limit->pl_corename = tmps; 942 return (0); 943 } 944 cleanup: 945 if (tmps) 946 free(tmps, M_TEMP); 947 return (error); 948 949 case PROC_PID_LIMIT: 950 if (namelen != 4 || name[2] < 1 || 951 name[2] >= PROC_PID_LIMIT_MAXID) 952 return (EINVAL); 953 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 954 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 955 error = sysctl_quad(oldp, oldlenp, newp, newlen, 956 &alim.rlim_max); 957 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 958 error = sysctl_quad(oldp, oldlenp, newp, newlen, 959 &alim.rlim_cur); 960 else 961 error = (EINVAL); 962 963 if (error) 964 return (error); 965 966 if (newp) 967 error = dosetrlimit(ptmp, p->p_cred, 968 name[2] - 1, &alim); 969 return (error); 970 971 default: 972 return (EINVAL); 973 } 974 /* NOTREACHED */ 975 return (EINVAL); 976 } 977 978 int 979 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 980 void *newp, size_t newlen, struct proc *p) 981 { 982 static struct { 983 const char *name; 984 int type; 985 } emulations[] = CTL_EMUL_NAMES; 986 const struct emul *e; 987 const char *ename; 988 #ifdef LKM 989 extern struct lock exec_lock; /* XXX */ 990 int error; 991 #else 992 extern int nexecs_builtin; 993 extern const struct execsw execsw_builtin[]; 994 int i; 995 #endif 996 997 /* all sysctl names at this level are name and field */ 998 if (namelen < 2) 999 return (ENOTDIR); /* overloaded */ 1000 1001 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 1002 return (EOPNOTSUPP); 1003 1004 ename = emulations[name[0]].name; 1005 1006 #ifdef LKM 1007 lockmgr(&exec_lock, LK_SHARED, NULL); 1008 if ((e = emul_search(ename))) { 1009 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1010 newp, newlen, p); 1011 } else 1012 error = EOPNOTSUPP; 1013 lockmgr(&exec_lock, LK_RELEASE, NULL); 1014 1015 return (error); 1016 #else 1017 for (i = 0; i < nexecs_builtin; i++) { 1018 e = execsw_builtin[i].es_emul; 1019 /* 1020 * In order to match e.g. e->e_name "irix o32" 1021 * with ename "irix", we limit the comparison 1022 * to the length of ename. 1023 */ 1024 if (e == NULL || 1025 strncmp(ename, e->e_name, strlen(ename)) != 0 || 1026 e->e_sysctl == NULL) 1027 continue; 1028 1029 return ((*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1030 newp, newlen, p)); 1031 } 1032 1033 return (EOPNOTSUPP); 1034 #endif 1035 } 1036 /* 1037 * Convenience macros. 1038 */ 1039 1040 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 1041 if (oldlenp) { \ 1042 if (!oldp) \ 1043 *oldlenp = len; \ 1044 else { \ 1045 if (*oldlenp < len) \ 1046 return (ENOMEM); \ 1047 *oldlenp = len; \ 1048 error = copyout(valp, oldp, len); \ 1049 } \ 1050 } 1051 1052 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 1053 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 1054 1055 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 1056 if (newp && newlen != len) \ 1057 return (EINVAL); 1058 1059 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1060 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1061 1062 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1063 if (error == 0 && newp) \ 1064 error = copyin(newp, valp, len); 1065 1066 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1067 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1068 1069 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1070 if (oldlenp) { \ 1071 len = strlen(str) + 1; \ 1072 if (!oldp) \ 1073 *oldlenp = len; \ 1074 else { \ 1075 if (*oldlenp < len) { \ 1076 err2 = ENOMEM; \ 1077 len = *oldlenp; \ 1078 } else \ 1079 *oldlenp = len; \ 1080 error = copyout(str, oldp, len);\ 1081 if (error == 0) \ 1082 error = err2; \ 1083 } \ 1084 } 1085 1086 /* 1087 * Validate parameters and get old / set new parameters 1088 * for an integer-valued sysctl function. 1089 */ 1090 int 1091 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1092 { 1093 int error = 0; 1094 1095 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1096 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1097 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1098 1099 return (error); 1100 } 1101 1102 1103 /* 1104 * As above, but read-only. 1105 */ 1106 int 1107 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1108 { 1109 int error = 0; 1110 1111 if (newp) 1112 return (EPERM); 1113 1114 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1115 1116 return (error); 1117 } 1118 1119 /* 1120 * Validate parameters and get old / set new parameters 1121 * for an quad-valued sysctl function. 1122 */ 1123 int 1124 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1125 quad_t *valp) 1126 { 1127 int error = 0; 1128 1129 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1130 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1131 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1132 1133 return (error); 1134 } 1135 1136 /* 1137 * As above, but read-only. 1138 */ 1139 int 1140 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1141 { 1142 int error = 0; 1143 1144 if (newp) 1145 return (EPERM); 1146 1147 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1148 1149 return (error); 1150 } 1151 1152 /* 1153 * Validate parameters and get old / set new parameters 1154 * for a string-valued sysctl function. 1155 */ 1156 int 1157 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1158 size_t maxlen) 1159 { 1160 int error = 0, err2 = 0; 1161 size_t len; 1162 1163 if (newp && newlen >= maxlen) 1164 return (EINVAL); 1165 1166 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1167 1168 if (error == 0 && newp) { 1169 error = copyin(newp, str, newlen); 1170 str[newlen] = 0; 1171 } 1172 return (error); 1173 } 1174 1175 /* 1176 * As above, but read-only. 1177 */ 1178 int 1179 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1180 { 1181 int error = 0, err2 = 0; 1182 size_t len; 1183 1184 if (newp) 1185 return (EPERM); 1186 1187 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1188 1189 return (error); 1190 } 1191 1192 /* 1193 * Validate parameters and get old / set new parameters 1194 * for a structure oriented sysctl function. 1195 */ 1196 int 1197 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1198 size_t len) 1199 { 1200 int error = 0; 1201 1202 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1203 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1204 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1205 1206 return (error); 1207 } 1208 1209 /* 1210 * Validate parameters and get old parameters 1211 * for a structure oriented sysctl function. 1212 */ 1213 int 1214 sysctl_rdstruct(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 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1223 1224 return (error); 1225 } 1226 1227 /* 1228 * As above, but can return a truncated result. 1229 */ 1230 int 1231 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1232 size_t len) 1233 { 1234 int error = 0; 1235 1236 if (newp) 1237 return (EPERM); 1238 1239 len = min(*oldlenp, len); 1240 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1241 1242 return (error); 1243 } 1244 1245 /* 1246 * Get file structures. 1247 */ 1248 static int 1249 sysctl_file(void *vwhere, size_t *sizep) 1250 { 1251 int error; 1252 size_t buflen; 1253 struct file *fp; 1254 char *start, *where; 1255 1256 start = where = vwhere; 1257 buflen = *sizep; 1258 if (where == NULL) { 1259 /* 1260 * overestimate by 10 files 1261 */ 1262 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1263 return (0); 1264 } 1265 1266 /* 1267 * first copyout filehead 1268 */ 1269 if (buflen < sizeof(filehead)) { 1270 *sizep = 0; 1271 return (0); 1272 } 1273 error = copyout(&filehead, where, sizeof(filehead)); 1274 if (error) 1275 return (error); 1276 buflen -= sizeof(filehead); 1277 where += sizeof(filehead); 1278 1279 /* 1280 * followed by an array of file structures 1281 */ 1282 LIST_FOREACH(fp, &filehead, f_list) { 1283 if (buflen < sizeof(struct file)) { 1284 *sizep = where - start; 1285 return (ENOMEM); 1286 } 1287 error = copyout(fp, where, sizeof(struct file)); 1288 if (error) 1289 return (error); 1290 buflen -= sizeof(struct file); 1291 where += sizeof(struct file); 1292 } 1293 *sizep = where - start; 1294 return (0); 1295 } 1296 1297 /* 1298 * Get driver names and majors 1299 */ 1300 static int 1301 sysctl_drivers(void *vwhere, size_t *sizep) 1302 { 1303 int error; 1304 size_t buflen; 1305 struct kinfo_drivers kd; 1306 char *start, *where; 1307 const char *name; 1308 int i; 1309 extern struct devsw_conv *devsw_conv; 1310 extern int max_devsw_convs; 1311 1312 start = where = vwhere; 1313 buflen = *sizep; 1314 if (where == NULL) { 1315 *sizep = max_devsw_convs * sizeof kd; 1316 return 0; 1317 } 1318 1319 /* 1320 * An array of kinfo_drivers structures 1321 */ 1322 error = 0; 1323 for (i = 0; i < max_devsw_convs; i++) { 1324 name = devsw_conv[i].d_name; 1325 if (name == NULL) 1326 continue; 1327 if (buflen < sizeof kd) { 1328 error = ENOMEM; 1329 break; 1330 } 1331 kd.d_bmajor = devsw_conv[i].d_bmajor; 1332 kd.d_cmajor = devsw_conv[i].d_cmajor; 1333 strlcpy(kd.d_name, name, sizeof kd.d_name); 1334 error = copyout(&kd, where, sizeof kd); 1335 if (error != 0) 1336 break; 1337 buflen -= sizeof kd; 1338 where += sizeof kd; 1339 } 1340 *sizep = where - start; 1341 return error; 1342 } 1343 1344 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1345 #define FILL_PERM(src, dst) do { \ 1346 (dst)._key = (src)._key; \ 1347 (dst).uid = (src).uid; \ 1348 (dst).gid = (src).gid; \ 1349 (dst).cuid = (src).cuid; \ 1350 (dst).cgid = (src).cgid; \ 1351 (dst).mode = (src).mode; \ 1352 (dst)._seq = (src)._seq; \ 1353 } while (/*CONSTCOND*/ 0); 1354 #define FILL_MSG(src, dst) do { \ 1355 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1356 (dst).msg_qnum = (src).msg_qnum; \ 1357 (dst).msg_qbytes = (src).msg_qbytes; \ 1358 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1359 (dst).msg_lspid = (src).msg_lspid; \ 1360 (dst).msg_lrpid = (src).msg_lrpid; \ 1361 (dst).msg_stime = (src).msg_stime; \ 1362 (dst).msg_rtime = (src).msg_rtime; \ 1363 (dst).msg_ctime = (src).msg_ctime; \ 1364 } while (/*CONSTCOND*/ 0) 1365 #define FILL_SEM(src, dst) do { \ 1366 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1367 (dst).sem_nsems = (src).sem_nsems; \ 1368 (dst).sem_otime = (src).sem_otime; \ 1369 (dst).sem_ctime = (src).sem_ctime; \ 1370 } while (/*CONSTCOND*/ 0) 1371 #define FILL_SHM(src, dst) do { \ 1372 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1373 (dst).shm_segsz = (src).shm_segsz; \ 1374 (dst).shm_lpid = (src).shm_lpid; \ 1375 (dst).shm_cpid = (src).shm_cpid; \ 1376 (dst).shm_atime = (src).shm_atime; \ 1377 (dst).shm_dtime = (src).shm_dtime; \ 1378 (dst).shm_ctime = (src).shm_ctime; \ 1379 (dst).shm_nattch = (src).shm_nattch; \ 1380 } while (/*CONSTCOND*/ 0) 1381 1382 static int 1383 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1384 { 1385 #ifdef SYSVMSG 1386 struct msg_sysctl_info *msgsi = NULL; 1387 #endif 1388 #ifdef SYSVSEM 1389 struct sem_sysctl_info *semsi = NULL; 1390 #endif 1391 #ifdef SYSVSHM 1392 struct shm_sysctl_info *shmsi = NULL; 1393 #endif 1394 size_t infosize, dssize, tsize, buflen; 1395 void *buf = NULL; 1396 char *start; 1397 int32_t nds; 1398 int i, error, ret; 1399 1400 if (namelen != 1) 1401 return (EINVAL); 1402 1403 start = where; 1404 buflen = *sizep; 1405 1406 switch (*name) { 1407 case KERN_SYSVIPC_MSG_INFO: 1408 #ifdef SYSVMSG 1409 infosize = sizeof(msgsi->msginfo); 1410 nds = msginfo.msgmni; 1411 dssize = sizeof(msgsi->msgids[0]); 1412 break; 1413 #else 1414 return (EINVAL); 1415 #endif 1416 case KERN_SYSVIPC_SEM_INFO: 1417 #ifdef SYSVSEM 1418 infosize = sizeof(semsi->seminfo); 1419 nds = seminfo.semmni; 1420 dssize = sizeof(semsi->semids[0]); 1421 break; 1422 #else 1423 return (EINVAL); 1424 #endif 1425 case KERN_SYSVIPC_SHM_INFO: 1426 #ifdef SYSVSHM 1427 infosize = sizeof(shmsi->shminfo); 1428 nds = shminfo.shmmni; 1429 dssize = sizeof(shmsi->shmids[0]); 1430 break; 1431 #else 1432 return (EINVAL); 1433 #endif 1434 default: 1435 return (EINVAL); 1436 } 1437 /* 1438 * Round infosize to 64 bit boundary if requesting more than just 1439 * the info structure or getting the total data size. 1440 */ 1441 if (where == NULL || *sizep > infosize) 1442 infosize = ((infosize + 7) / 8) * 8; 1443 tsize = infosize + nds * dssize; 1444 1445 /* Return just the total size required. */ 1446 if (where == NULL) { 1447 *sizep = tsize; 1448 return (0); 1449 } 1450 1451 /* Not enough room for even the info struct. */ 1452 if (buflen < infosize) { 1453 *sizep = 0; 1454 return (ENOMEM); 1455 } 1456 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1457 memset(buf, 0, min(tsize, buflen)); 1458 1459 switch (*name) { 1460 #ifdef SYSVMSG 1461 case KERN_SYSVIPC_MSG_INFO: 1462 msgsi = (struct msg_sysctl_info *)buf; 1463 msgsi->msginfo = msginfo; 1464 break; 1465 #endif 1466 #ifdef SYSVSEM 1467 case KERN_SYSVIPC_SEM_INFO: 1468 semsi = (struct sem_sysctl_info *)buf; 1469 semsi->seminfo = seminfo; 1470 break; 1471 #endif 1472 #ifdef SYSVSHM 1473 case KERN_SYSVIPC_SHM_INFO: 1474 shmsi = (struct shm_sysctl_info *)buf; 1475 shmsi->shminfo = shminfo; 1476 break; 1477 #endif 1478 } 1479 buflen -= infosize; 1480 1481 ret = 0; 1482 if (buflen > 0) { 1483 /* Fill in the IPC data structures. */ 1484 for (i = 0; i < nds; i++) { 1485 if (buflen < dssize) { 1486 ret = ENOMEM; 1487 break; 1488 } 1489 switch (*name) { 1490 #ifdef SYSVMSG 1491 case KERN_SYSVIPC_MSG_INFO: 1492 FILL_MSG(msqids[i], msgsi->msgids[i]); 1493 break; 1494 #endif 1495 #ifdef SYSVSEM 1496 case KERN_SYSVIPC_SEM_INFO: 1497 FILL_SEM(sema[i], semsi->semids[i]); 1498 break; 1499 #endif 1500 #ifdef SYSVSHM 1501 case KERN_SYSVIPC_SHM_INFO: 1502 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1503 break; 1504 #endif 1505 } 1506 buflen -= dssize; 1507 } 1508 } 1509 *sizep -= buflen; 1510 error = copyout(buf, start, *sizep); 1511 /* If copyout succeeded, use return code set earlier. */ 1512 if (error == 0) 1513 error = ret; 1514 if (buf) 1515 free(buf, M_TEMP); 1516 return (error); 1517 } 1518 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1519 1520 static int 1521 sysctl_msgbuf(void *vwhere, size_t *sizep) 1522 { 1523 char *where = vwhere; 1524 size_t len, maxlen = *sizep; 1525 long beg, end; 1526 int error; 1527 1528 /* 1529 * deal with cases where the message buffer has 1530 * become corrupted. 1531 */ 1532 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1533 msgbufenabled = 0; 1534 return (ENXIO); 1535 } 1536 1537 if (where == NULL) { 1538 /* always return full buffer size */ 1539 *sizep = msgbufp->msg_bufs; 1540 return (0); 1541 } 1542 1543 error = 0; 1544 maxlen = min(msgbufp->msg_bufs, maxlen); 1545 1546 /* 1547 * First, copy from the write pointer to the end of 1548 * message buffer. 1549 */ 1550 beg = msgbufp->msg_bufx; 1551 end = msgbufp->msg_bufs; 1552 while (maxlen > 0) { 1553 len = min(end - beg, maxlen); 1554 if (len == 0) 1555 break; 1556 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1557 if (error) 1558 break; 1559 where += len; 1560 maxlen -= len; 1561 1562 /* 1563 * ... then, copy from the beginning of message buffer to 1564 * the write pointer. 1565 */ 1566 beg = 0; 1567 end = msgbufp->msg_bufx; 1568 } 1569 return (error); 1570 } 1571 1572 /* 1573 * try over estimating by 5 procs 1574 */ 1575 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1576 1577 static int 1578 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1579 { 1580 struct eproc eproc; 1581 struct kinfo_proc2 kproc2; 1582 struct kinfo_proc *dp; 1583 struct proc *p; 1584 const struct proclist_desc *pd; 1585 char *where, *dp2; 1586 int type, op, arg; 1587 u_int elem_size, elem_count; 1588 size_t buflen, needed; 1589 int error; 1590 1591 dp = vwhere; 1592 dp2 = where = vwhere; 1593 buflen = where != NULL ? *sizep : 0; 1594 error = 0; 1595 needed = 0; 1596 type = name[0]; 1597 1598 if (type == KERN_PROC) { 1599 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1600 return (EINVAL); 1601 op = name[1]; 1602 if (op != KERN_PROC_ALL) 1603 arg = name[2]; 1604 else 1605 arg = 0; /* Quell compiler warning */ 1606 elem_size = elem_count = 0; /* Ditto */ 1607 } else { 1608 if (namelen != 5) 1609 return (EINVAL); 1610 op = name[1]; 1611 arg = name[2]; 1612 elem_size = name[3]; 1613 elem_count = name[4]; 1614 } 1615 1616 proclist_lock_read(); 1617 1618 pd = proclists; 1619 again: 1620 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1621 /* 1622 * Skip embryonic processes. 1623 */ 1624 if (p->p_stat == SIDL) 1625 continue; 1626 /* 1627 * TODO - make more efficient (see notes below). 1628 * do by session. 1629 */ 1630 switch (op) { 1631 1632 case KERN_PROC_PID: 1633 /* could do this with just a lookup */ 1634 if (p->p_pid != (pid_t)arg) 1635 continue; 1636 break; 1637 1638 case KERN_PROC_PGRP: 1639 /* could do this by traversing pgrp */ 1640 if (p->p_pgrp->pg_id != (pid_t)arg) 1641 continue; 1642 break; 1643 1644 case KERN_PROC_SESSION: 1645 if (p->p_session->s_sid != (pid_t)arg) 1646 continue; 1647 break; 1648 1649 case KERN_PROC_TTY: 1650 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1651 if ((p->p_flag & P_CONTROLT) == 0 || 1652 p->p_session->s_ttyp == NULL || 1653 p->p_session->s_ttyvp != NULL) 1654 continue; 1655 } else if ((p->p_flag & P_CONTROLT) == 0 || 1656 p->p_session->s_ttyp == NULL) { 1657 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1658 continue; 1659 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1660 continue; 1661 break; 1662 1663 case KERN_PROC_UID: 1664 if (p->p_ucred->cr_uid != (uid_t)arg) 1665 continue; 1666 break; 1667 1668 case KERN_PROC_RUID: 1669 if (p->p_cred->p_ruid != (uid_t)arg) 1670 continue; 1671 break; 1672 1673 case KERN_PROC_GID: 1674 if (p->p_ucred->cr_gid != (uid_t)arg) 1675 continue; 1676 break; 1677 1678 case KERN_PROC_RGID: 1679 if (p->p_cred->p_rgid != (uid_t)arg) 1680 continue; 1681 break; 1682 1683 case KERN_PROC_ALL: 1684 /* allow everything */ 1685 break; 1686 1687 default: 1688 error = EINVAL; 1689 goto cleanup; 1690 } 1691 if (type == KERN_PROC) { 1692 if (buflen >= sizeof(struct kinfo_proc)) { 1693 fill_eproc(p, &eproc); 1694 error = copyout(p, &dp->kp_proc, 1695 sizeof(struct proc)); 1696 if (error) 1697 goto cleanup; 1698 error = copyout(&eproc, &dp->kp_eproc, 1699 sizeof(eproc)); 1700 if (error) 1701 goto cleanup; 1702 dp++; 1703 buflen -= sizeof(struct kinfo_proc); 1704 } 1705 needed += sizeof(struct kinfo_proc); 1706 } else { /* KERN_PROC2 */ 1707 if (buflen >= elem_size && elem_count > 0) { 1708 fill_kproc2(p, &kproc2); 1709 /* 1710 * Copy out elem_size, but not larger than 1711 * the size of a struct kinfo_proc2. 1712 */ 1713 error = copyout(&kproc2, dp2, 1714 min(sizeof(kproc2), elem_size)); 1715 if (error) 1716 goto cleanup; 1717 dp2 += elem_size; 1718 buflen -= elem_size; 1719 elem_count--; 1720 } 1721 needed += elem_size; 1722 } 1723 } 1724 pd++; 1725 if (pd->pd_list != NULL) 1726 goto again; 1727 proclist_unlock_read(); 1728 1729 if (where != NULL) { 1730 if (type == KERN_PROC) 1731 *sizep = (char *)dp - where; 1732 else 1733 *sizep = dp2 - where; 1734 if (needed > *sizep) 1735 return (ENOMEM); 1736 } else { 1737 needed += KERN_PROCSLOP; 1738 *sizep = needed; 1739 } 1740 return (0); 1741 cleanup: 1742 proclist_unlock_read(); 1743 return (error); 1744 } 1745 1746 1747 /* 1748 * try over estimating by 5 LWPs 1749 */ 1750 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1751 1752 static int 1753 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1754 { 1755 struct kinfo_lwp klwp; 1756 struct proc *p; 1757 struct lwp *l; 1758 char *where, *dp; 1759 int pid, elem_size, elem_count; 1760 int buflen, needed, error; 1761 1762 dp = where = vwhere; 1763 buflen = where != NULL ? *sizep : 0; 1764 error = needed = 0; 1765 1766 if (namelen != 4) 1767 return (EINVAL); 1768 pid = name[1]; 1769 elem_size = name[2]; 1770 elem_count = name[3]; 1771 1772 p = pfind(pid); 1773 if (p == NULL) 1774 return (ESRCH); 1775 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1776 if (buflen >= elem_size && elem_count > 0) { 1777 fill_lwp(l, &klwp); 1778 /* 1779 * Copy out elem_size, but not larger than 1780 * the size of a struct kinfo_proc2. 1781 */ 1782 error = copyout(&klwp, dp, 1783 min(sizeof(klwp), elem_size)); 1784 if (error) 1785 goto cleanup; 1786 dp += elem_size; 1787 buflen -= elem_size; 1788 elem_count--; 1789 } 1790 needed += elem_size; 1791 } 1792 1793 if (where != NULL) { 1794 *sizep = dp - where; 1795 if (needed > *sizep) 1796 return (ENOMEM); 1797 } else { 1798 needed += KERN_PROCSLOP; 1799 *sizep = needed; 1800 } 1801 return (0); 1802 cleanup: 1803 return (error); 1804 } 1805 1806 /* 1807 * Fill in an eproc structure for the specified process. 1808 */ 1809 void 1810 fill_eproc(struct proc *p, struct eproc *ep) 1811 { 1812 struct tty *tp; 1813 struct lwp *l; 1814 1815 ep->e_paddr = p; 1816 ep->e_sess = p->p_session; 1817 ep->e_pcred = *p->p_cred; 1818 ep->e_ucred = *p->p_ucred; 1819 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1820 ep->e_vm.vm_rssize = 0; 1821 ep->e_vm.vm_tsize = 0; 1822 ep->e_vm.vm_dsize = 0; 1823 ep->e_vm.vm_ssize = 0; 1824 /* ep->e_vm.vm_pmap = XXX; */ 1825 } else { 1826 struct vmspace *vm = p->p_vmspace; 1827 1828 ep->e_vm.vm_rssize = vm_resident_count(vm); 1829 ep->e_vm.vm_tsize = vm->vm_tsize; 1830 ep->e_vm.vm_dsize = vm->vm_dsize; 1831 ep->e_vm.vm_ssize = vm->vm_ssize; 1832 1833 /* Pick a "representative" LWP */ 1834 l = proc_representative_lwp(p); 1835 1836 if (l->l_wmesg) 1837 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1838 } 1839 if (p->p_pptr) 1840 ep->e_ppid = p->p_pptr->p_pid; 1841 else 1842 ep->e_ppid = 0; 1843 ep->e_pgid = p->p_pgrp->pg_id; 1844 ep->e_sid = ep->e_sess->s_sid; 1845 ep->e_jobc = p->p_pgrp->pg_jobc; 1846 if ((p->p_flag & P_CONTROLT) && 1847 (tp = ep->e_sess->s_ttyp)) { 1848 ep->e_tdev = tp->t_dev; 1849 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1850 ep->e_tsess = tp->t_session; 1851 } else 1852 ep->e_tdev = NODEV; 1853 1854 ep->e_xsize = ep->e_xrssize = 0; 1855 ep->e_xccount = ep->e_xswrss = 0; 1856 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1857 if (SESS_LEADER(p)) 1858 ep->e_flag |= EPROC_SLEADER; 1859 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1860 } 1861 1862 /* 1863 * Fill in an eproc structure for the specified process. 1864 */ 1865 static void 1866 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1867 { 1868 struct tty *tp; 1869 struct lwp *l; 1870 struct timeval ut, st; 1871 1872 memset(ki, 0, sizeof(*ki)); 1873 1874 ki->p_paddr = PTRTOINT64(p); 1875 ki->p_fd = PTRTOINT64(p->p_fd); 1876 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1877 ki->p_stats = PTRTOINT64(p->p_stats); 1878 ki->p_limit = PTRTOINT64(p->p_limit); 1879 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1880 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1881 ki->p_sess = PTRTOINT64(p->p_session); 1882 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1883 ki->p_ru = PTRTOINT64(p->p_ru); 1884 1885 ki->p_eflag = 0; 1886 ki->p_exitsig = p->p_exitsig; 1887 ki->p_flag = p->p_flag; 1888 1889 ki->p_pid = p->p_pid; 1890 if (p->p_pptr) 1891 ki->p_ppid = p->p_pptr->p_pid; 1892 else 1893 ki->p_ppid = 0; 1894 ki->p_sid = p->p_session->s_sid; 1895 ki->p__pgid = p->p_pgrp->pg_id; 1896 1897 ki->p_tpgid = NO_PGID; /* may be changed if controlling tty below */ 1898 1899 ki->p_uid = p->p_ucred->cr_uid; 1900 ki->p_ruid = p->p_cred->p_ruid; 1901 ki->p_gid = p->p_ucred->cr_gid; 1902 ki->p_rgid = p->p_cred->p_rgid; 1903 ki->p_svuid = p->p_cred->p_svuid; 1904 ki->p_svgid = p->p_cred->p_svgid; 1905 1906 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1907 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1908 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1909 1910 ki->p_jobc = p->p_pgrp->pg_jobc; 1911 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1912 ki->p_tdev = tp->t_dev; 1913 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1914 ki->p_tsess = PTRTOINT64(tp->t_session); 1915 } else { 1916 ki->p_tdev = NODEV; 1917 } 1918 1919 ki->p_estcpu = p->p_estcpu; 1920 ki->p_rtime_sec = p->p_rtime.tv_sec; 1921 ki->p_rtime_usec = p->p_rtime.tv_usec; 1922 ki->p_cpticks = p->p_cpticks; 1923 ki->p_pctcpu = p->p_pctcpu; 1924 1925 ki->p_uticks = p->p_uticks; 1926 ki->p_sticks = p->p_sticks; 1927 ki->p_iticks = p->p_iticks; 1928 1929 ki->p_tracep = PTRTOINT64(p->p_tracep); 1930 ki->p_traceflag = p->p_traceflag; 1931 1932 1933 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1934 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1935 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1936 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1937 1938 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1939 ki->p_realstat = p->p_stat; 1940 ki->p_nice = p->p_nice; 1941 1942 ki->p_xstat = p->p_xstat; 1943 ki->p_acflag = p->p_acflag; 1944 1945 strncpy(ki->p_comm, p->p_comm, 1946 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1947 1948 strncpy(ki->p_login, p->p_session->s_login, 1949 min(sizeof ki->p_login - 1, sizeof p->p_session->s_login)); 1950 1951 ki->p_nlwps = p->p_nlwps; 1952 ki->p_nrlwps = p->p_nrlwps; 1953 ki->p_realflag = p->p_flag; 1954 1955 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1956 ki->p_vm_rssize = 0; 1957 ki->p_vm_tsize = 0; 1958 ki->p_vm_dsize = 0; 1959 ki->p_vm_ssize = 0; 1960 l = NULL; 1961 } else { 1962 struct vmspace *vm = p->p_vmspace; 1963 1964 ki->p_vm_rssize = vm_resident_count(vm); 1965 ki->p_vm_tsize = vm->vm_tsize; 1966 ki->p_vm_dsize = vm->vm_dsize; 1967 ki->p_vm_ssize = vm->vm_ssize; 1968 1969 /* Pick a "representative" LWP */ 1970 l = proc_representative_lwp(p); 1971 ki->p_forw = PTRTOINT64(l->l_forw); 1972 ki->p_back = PTRTOINT64(l->l_back); 1973 ki->p_addr = PTRTOINT64(l->l_addr); 1974 ki->p_stat = l->l_stat; 1975 ki->p_flag |= l->l_flag; 1976 ki->p_swtime = l->l_swtime; 1977 ki->p_slptime = l->l_slptime; 1978 if (l->l_stat == LSONPROC) { 1979 KDASSERT(l->l_cpu != NULL); 1980 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1981 } else 1982 ki->p_schedflags = 0; 1983 ki->p_holdcnt = l->l_holdcnt; 1984 ki->p_priority = l->l_priority; 1985 ki->p_usrpri = l->l_usrpri; 1986 if (l->l_wmesg) 1987 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1988 ki->p_wchan = PTRTOINT64(l->l_wchan); 1989 1990 } 1991 1992 if (p->p_session->s_ttyvp) 1993 ki->p_eflag |= EPROC_CTTY; 1994 if (SESS_LEADER(p)) 1995 ki->p_eflag |= EPROC_SLEADER; 1996 1997 /* XXX Is this double check necessary? */ 1998 if (P_ZOMBIE(p)) { 1999 ki->p_uvalid = 0; 2000 } else { 2001 ki->p_uvalid = 1; 2002 2003 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 2004 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 2005 2006 calcru(p, &ut, &st, 0); 2007 ki->p_uutime_sec = ut.tv_sec; 2008 ki->p_uutime_usec = ut.tv_usec; 2009 ki->p_ustime_sec = st.tv_sec; 2010 ki->p_ustime_usec = st.tv_usec; 2011 2012 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 2013 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 2014 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 2015 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 2016 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 2017 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 2018 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 2019 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 2020 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 2021 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 2022 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 2023 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 2024 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 2025 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 2026 2027 timeradd(&p->p_stats->p_cru.ru_utime, 2028 &p->p_stats->p_cru.ru_stime, &ut); 2029 ki->p_uctime_sec = ut.tv_sec; 2030 ki->p_uctime_usec = ut.tv_usec; 2031 } 2032 #ifdef MULTIPROCESSOR 2033 if (l && l->l_cpu != NULL) 2034 ki->p_cpuid = l->l_cpu->ci_cpuid; 2035 else 2036 #endif 2037 ki->p_cpuid = KI_NOCPU; 2038 2039 } 2040 2041 /* 2042 * Fill in a kinfo_lwp structure for the specified lwp. 2043 */ 2044 static void 2045 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 2046 { 2047 2048 kl->l_forw = PTRTOINT64(l->l_forw); 2049 kl->l_back = PTRTOINT64(l->l_back); 2050 kl->l_laddr = PTRTOINT64(l); 2051 kl->l_addr = PTRTOINT64(l->l_addr); 2052 kl->l_stat = l->l_stat; 2053 kl->l_lid = l->l_lid; 2054 kl->l_flag = l->l_flag; 2055 2056 kl->l_swtime = l->l_swtime; 2057 kl->l_slptime = l->l_slptime; 2058 if (l->l_stat == LSONPROC) { 2059 KDASSERT(l->l_cpu != NULL); 2060 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 2061 } else 2062 kl->l_schedflags = 0; 2063 kl->l_holdcnt = l->l_holdcnt; 2064 kl->l_priority = l->l_priority; 2065 kl->l_usrpri = l->l_usrpri; 2066 if (l->l_wmesg) 2067 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 2068 kl->l_wchan = PTRTOINT64(l->l_wchan); 2069 #ifdef MULTIPROCESSOR 2070 if (l->l_cpu != NULL) 2071 kl->l_cpuid = l->l_cpu->ci_cpuid; 2072 else 2073 #endif 2074 kl->l_cpuid = KI_NOCPU; 2075 } 2076 2077 int 2078 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 2079 struct proc *up) 2080 { 2081 struct ps_strings pss; 2082 struct proc *p; 2083 size_t len, upper_bound, xlen, i; 2084 struct uio auio; 2085 struct iovec aiov; 2086 vaddr_t argv; 2087 pid_t pid; 2088 int nargv, type, error; 2089 char *arg; 2090 char *tmp; 2091 2092 if (namelen != 2) 2093 return (EINVAL); 2094 pid = name[0]; 2095 type = name[1]; 2096 2097 switch (type) { 2098 case KERN_PROC_ARGV: 2099 case KERN_PROC_NARGV: 2100 case KERN_PROC_ENV: 2101 case KERN_PROC_NENV: 2102 /* ok */ 2103 break; 2104 default: 2105 return (EINVAL); 2106 } 2107 2108 /* check pid */ 2109 if ((p = pfind(pid)) == NULL) 2110 return (EINVAL); 2111 2112 /* only root or same user change look at the environment */ 2113 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 2114 if (up->p_ucred->cr_uid != 0) { 2115 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 2116 up->p_cred->p_ruid != p->p_cred->p_svuid) 2117 return (EPERM); 2118 } 2119 } 2120 2121 if (sizep != NULL && where == NULL) { 2122 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 2123 *sizep = sizeof (int); 2124 else 2125 *sizep = ARG_MAX; /* XXX XXX XXX */ 2126 return (0); 2127 } 2128 if (where == NULL || sizep == NULL) 2129 return (EINVAL); 2130 2131 /* 2132 * Zombies don't have a stack, so we can't read their psstrings. 2133 * System processes also don't have a user stack. 2134 */ 2135 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 2136 return (EINVAL); 2137 2138 /* 2139 * Lock the process down in memory. 2140 */ 2141 /* XXXCDC: how should locking work here? */ 2142 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 2143 return (EFAULT); 2144 2145 p->p_vmspace->vm_refcnt++; /* XXX */ 2146 2147 /* 2148 * Allocate a temporary buffer to hold the arguments. 2149 */ 2150 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2151 2152 /* 2153 * Read in the ps_strings structure. 2154 */ 2155 aiov.iov_base = &pss; 2156 aiov.iov_len = sizeof(pss); 2157 auio.uio_iov = &aiov; 2158 auio.uio_iovcnt = 1; 2159 auio.uio_offset = (vaddr_t)p->p_psstr; 2160 auio.uio_resid = sizeof(pss); 2161 auio.uio_segflg = UIO_SYSSPACE; 2162 auio.uio_rw = UIO_READ; 2163 auio.uio_procp = NULL; 2164 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2165 if (error) 2166 goto done; 2167 2168 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2169 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2170 else 2171 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2172 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2173 error = copyout(&nargv, where, sizeof(nargv)); 2174 *sizep = sizeof(nargv); 2175 goto done; 2176 } 2177 /* 2178 * Now read the address of the argument vector. 2179 */ 2180 switch (type) { 2181 case KERN_PROC_ARGV: 2182 /* XXX compat32 stuff here */ 2183 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2184 break; 2185 case KERN_PROC_ENV: 2186 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2187 break; 2188 default: 2189 return (EINVAL); 2190 } 2191 auio.uio_offset = (off_t)(long)tmp; 2192 aiov.iov_base = &argv; 2193 aiov.iov_len = sizeof(argv); 2194 auio.uio_iov = &aiov; 2195 auio.uio_iovcnt = 1; 2196 auio.uio_resid = sizeof(argv); 2197 auio.uio_segflg = UIO_SYSSPACE; 2198 auio.uio_rw = UIO_READ; 2199 auio.uio_procp = NULL; 2200 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2201 if (error) 2202 goto done; 2203 2204 /* 2205 * Now copy in the actual argument vector, one page at a time, 2206 * since we don't know how long the vector is (though, we do 2207 * know how many NUL-terminated strings are in the vector). 2208 */ 2209 len = 0; 2210 upper_bound = *sizep; 2211 for (; nargv != 0 && len < upper_bound; len += xlen) { 2212 aiov.iov_base = arg; 2213 aiov.iov_len = PAGE_SIZE; 2214 auio.uio_iov = &aiov; 2215 auio.uio_iovcnt = 1; 2216 auio.uio_offset = argv + len; 2217 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2218 auio.uio_resid = xlen; 2219 auio.uio_segflg = UIO_SYSSPACE; 2220 auio.uio_rw = UIO_READ; 2221 auio.uio_procp = NULL; 2222 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2223 if (error) 2224 goto done; 2225 2226 for (i = 0; i < xlen && nargv != 0; i++) { 2227 if (arg[i] == '\0') 2228 nargv--; /* one full string */ 2229 } 2230 2231 /* 2232 * Make sure we don't copyout past the end of the user's 2233 * buffer. 2234 */ 2235 if (len + i > upper_bound) 2236 i = upper_bound - len; 2237 2238 error = copyout(arg, (char *)where + len, i); 2239 if (error) 2240 break; 2241 2242 if (nargv == 0) { 2243 len += i; 2244 break; 2245 } 2246 } 2247 *sizep = len; 2248 2249 done: 2250 uvmspace_free(p->p_vmspace); 2251 2252 free(arg, M_TEMP); 2253 return (error); 2254 } 2255 2256 #if NPTY > 0 2257 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2258 2259 /* 2260 * Validate parameters and get old / set new parameters 2261 * for pty sysctl function. 2262 */ 2263 static int 2264 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2265 { 2266 int error = 0; 2267 int oldmax = 0, newmax = 0; 2268 2269 /* get current value of maxptys */ 2270 oldmax = pty_maxptys(0, 0); 2271 2272 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2273 2274 if (!error && newp) { 2275 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2276 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2277 2278 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2279 return (EINVAL); 2280 2281 } 2282 2283 return (error); 2284 } 2285 #endif /* NPTY > 0 */ 2286 2287 static int 2288 sysctl_dotkstat(int *name, u_int namelen, void *where, size_t *sizep, 2289 void *newp) 2290 { 2291 2292 /* all sysctl names at this level are terminal */ 2293 if (namelen != 1) 2294 return (ENOTDIR); /* overloaded */ 2295 2296 switch (name[0]) { 2297 case KERN_TKSTAT_NIN: 2298 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2299 case KERN_TKSTAT_NOUT: 2300 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2301 case KERN_TKSTAT_CANCC: 2302 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2303 case KERN_TKSTAT_RAWCC: 2304 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2305 default: 2306 return (EOPNOTSUPP); 2307 } 2308 } 2309
Indexes created Tue Sep 30 11:09:46 GMT 2025