kern_sysctl.c revision 1.147
1 /* $NetBSD: kern_sysctl.c,v 1.147 2003/10/01 21:45:14 itojun Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95 35 */ 36 37 /* 38 * sysctl system call. 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: kern_sysctl.c,v 1.147 2003/10/01 21:45:14 itojun Exp $"); 43 44 #include "opt_ddb.h" 45 #include "opt_insecure.h" 46 #include "opt_defcorename.h" 47 #include "opt_multiprocessor.h" 48 #include "opt_pipe.h" 49 #include "opt_sysv.h" 50 #include "pty.h" 51 #include "rnd.h" 52 53 #include <sys/param.h> 54 #include <sys/systm.h> 55 #include <sys/kernel.h> 56 #include <sys/buf.h> 57 #include <sys/device.h> 58 #include <sys/disklabel.h> 59 #include <sys/dkstat.h> 60 #include <sys/exec.h> 61 #include <sys/file.h> 62 #include <sys/ioctl.h> 63 #include <sys/malloc.h> 64 #include <sys/mount.h> 65 #include <sys/msgbuf.h> 66 #include <sys/pool.h> 67 #include <sys/proc.h> 68 #include <sys/resource.h> 69 #include <sys/resourcevar.h> 70 #include <sys/sa.h> 71 #include <sys/syscallargs.h> 72 #include <sys/tty.h> 73 #include <sys/unistd.h> 74 #include <sys/vnode.h> 75 #include <sys/socketvar.h> 76 #define __SYSCTL_PRIVATE 77 #include <sys/sysctl.h> 78 #include <sys/lock.h> 79 #include <sys/namei.h> 80 #include <sys/conf.h> 81 82 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 83 #include <sys/ipc.h> 84 #endif 85 #ifdef SYSVMSG 86 #include <sys/msg.h> 87 #endif 88 #ifdef SYSVSEM 89 #include <sys/sem.h> 90 #endif 91 #ifdef SYSVSHM 92 #include <sys/shm.h> 93 #endif 94 95 #include <dev/cons.h> 96 97 #if defined(DDB) 98 #include <ddb/ddbvar.h> 99 #endif 100 101 #ifndef PIPE_SOCKETPAIR 102 #include <sys/pipe.h> 103 #endif 104 105 #if NRND > 0 106 #include <sys/rnd.h> 107 #endif 108 109 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 110 111 static int sysctl_file(void *, size_t *); 112 static int sysctl_drivers(void *, size_t *); 113 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 114 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 115 #endif 116 static int sysctl_msgbuf(void *, size_t *); 117 static int sysctl_doeproc(int *, u_int, void *, size_t *); 118 static int sysctl_dolwp(int *, u_int, void *, size_t *); 119 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 120 #ifdef MULTIPROCESSOR 121 static int sysctl_docptime(void *, size_t *, void *); 122 static int sysctl_ncpus(void); 123 #endif 124 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 125 static void fill_lwp(struct lwp *, struct kinfo_lwp *); 126 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 127 #if NPTY > 0 128 static int sysctl_pty(void *, size_t *, void *, size_t); 129 #endif 130 131 /* 132 * The `sysctl_memlock' is intended to keep too many processes from 133 * locking down memory by doing sysctls at once. Whether or not this 134 * is really a good idea to worry about it probably a subject of some 135 * debate. 136 */ 137 struct lock sysctl_memlock; 138 139 void 140 sysctl_init(void) 141 { 142 143 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 144 } 145 146 int 147 sys___sysctl(struct lwp *l, void *v, register_t *retval) 148 { 149 struct sys___sysctl_args /* { 150 syscallarg(int *) name; 151 syscallarg(u_int) namelen; 152 syscallarg(void *) old; 153 syscallarg(size_t *) oldlenp; 154 syscallarg(void *) new; 155 syscallarg(size_t) newlen; 156 } */ *uap = v; 157 struct proc *p = l->l_proc; 158 int error; 159 size_t savelen = 0, oldlen = 0; 160 sysctlfn *fn; 161 int name[CTL_MAXNAME]; 162 163 /* 164 * all top-level sysctl names are non-terminal 165 */ 166 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 167 return (EINVAL); 168 error = copyin(SCARG(uap, name), &name, 169 SCARG(uap, namelen) * sizeof(int)); 170 if (error) 171 return (error); 172 173 /* 174 * For all but CTL_PROC, must be root to change a value. 175 * For CTL_PROC, must be root, or owner of the proc (and not suid), 176 * this is checked in proc_sysctl() (once we know the targer proc). 177 */ 178 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 179 (error = suser(p->p_ucred, &p->p_acflag))) 180 return (error); 181 182 switch (name[0]) { 183 case CTL_KERN: 184 fn = kern_sysctl; 185 break; 186 case CTL_HW: 187 fn = hw_sysctl; 188 break; 189 case CTL_VM: 190 fn = uvm_sysctl; 191 break; 192 case CTL_NET: 193 fn = net_sysctl; 194 break; 195 case CTL_VFS: 196 fn = vfs_sysctl; 197 break; 198 case CTL_MACHDEP: 199 fn = cpu_sysctl; 200 break; 201 #ifdef DEBUG 202 case CTL_DEBUG: 203 fn = debug_sysctl; 204 break; 205 #endif 206 #ifdef DDB 207 case CTL_DDB: 208 fn = ddb_sysctl; 209 break; 210 #endif 211 case CTL_PROC: 212 fn = proc_sysctl; 213 break; 214 215 case CTL_EMUL: 216 fn = emul_sysctl; 217 break; 218 default: 219 return (EOPNOTSUPP); 220 } 221 222 /* 223 * XXX Hey, we wire `old', but what about `new'? 224 */ 225 226 if (SCARG(uap, oldlenp)) { 227 if ((error = copyin(SCARG(uap, oldlenp), &oldlen, 228 sizeof(oldlen)))) 229 return (error); 230 } 231 if (SCARG(uap, old) != NULL) { 232 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 233 if (error) 234 return (error); 235 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 236 if (error) { 237 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 238 return (error); 239 } 240 savelen = oldlen; 241 } 242 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 243 &oldlen, SCARG(uap, new), SCARG(uap, newlen), p); 244 if (SCARG(uap, old) != NULL) { 245 uvm_vsunlock(p, SCARG(uap, old), savelen); 246 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 247 } 248 if (error) 249 return (error); 250 if (SCARG(uap, oldlenp)) 251 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 252 return (error); 253 } 254 255 /* 256 * Attributes stored in the kernel. 257 */ 258 char hostname[MAXHOSTNAMELEN]; 259 int hostnamelen; 260 261 char domainname[MAXHOSTNAMELEN]; 262 int domainnamelen; 263 264 long hostid; 265 266 #ifdef INSECURE 267 int securelevel = -1; 268 #else 269 int securelevel = 0; 270 #endif 271 272 #ifndef DEFCORENAME 273 #define DEFCORENAME "%n.core" 274 #endif 275 char defcorename[MAXPATHLEN] = DEFCORENAME; 276 277 extern int kern_logsigexit; 278 extern fixpt_t ccpu; 279 extern int forkfsleep; 280 extern int dumponpanic; 281 282 #ifndef MULTIPROCESSOR 283 #define sysctl_ncpus() 1 284 #endif 285 286 #ifdef MULTIPROCESSOR 287 288 #ifndef CPU_INFO_FOREACH 289 #define CPU_INFO_ITERATOR int 290 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 291 #endif 292 293 static int 294 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 295 { 296 u_int64_t cp_time[CPUSTATES]; 297 int i; 298 struct cpu_info *ci; 299 CPU_INFO_ITERATOR cii; 300 301 for (i = 0; i < CPUSTATES; i++) 302 cp_time[i] = 0; 303 304 for (CPU_INFO_FOREACH(cii, ci)) { 305 for (i = 0; i < CPUSTATES; i++) 306 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 307 } 308 return (sysctl_rdstruct(oldp, oldlenp, newp, 309 cp_time, sizeof(cp_time))); 310 } 311 312 static int 313 sysctl_ncpus(void) 314 { 315 struct cpu_info *ci; 316 CPU_INFO_ITERATOR cii; 317 318 int ncpus = 0; 319 for (CPU_INFO_FOREACH(cii, ci)) 320 ncpus++; 321 return (ncpus); 322 } 323 324 #endif 325 326 /* 327 * kernel related system variables. 328 */ 329 int 330 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 331 void *newp, size_t newlen, struct proc *p) 332 { 333 int error, level, inthostid; 334 int old_autonicetime; 335 int old_vnodes; 336 dev_t consdev; 337 #if NRND > 0 338 int v; 339 #endif 340 341 /* All sysctl names at this level, except for a few, are terminal. */ 342 switch (name[0]) { 343 case KERN_PROC: 344 case KERN_PROC2: 345 case KERN_LWP: 346 case KERN_PROF: 347 case KERN_MBUF: 348 case KERN_PROC_ARGS: 349 case KERN_SYSVIPC_INFO: 350 case KERN_PIPE: 351 case KERN_TKSTAT: 352 /* Not terminal. */ 353 break; 354 default: 355 if (namelen != 1) 356 return (ENOTDIR); /* overloaded */ 357 } 358 359 switch (name[0]) { 360 case KERN_OSTYPE: 361 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 362 case KERN_OSRELEASE: 363 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 364 case KERN_OSREV: 365 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 366 case KERN_VERSION: 367 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 368 case KERN_MAXVNODES: 369 old_vnodes = desiredvnodes; 370 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 371 if (newp && !error) { 372 if (old_vnodes > desiredvnodes) { 373 error = vfs_drainvnodes(desiredvnodes, p); 374 if (error) { 375 desiredvnodes = old_vnodes; 376 return error; 377 } 378 } 379 vfs_reinit(); 380 nchreinit(); 381 } 382 return (error); 383 case KERN_MAXPROC: 384 { 385 int nmaxproc = maxproc; 386 387 error = sysctl_int(oldp, oldlenp, newp, newlen, &nmaxproc); 388 389 if (!error && newp) { 390 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 391 return (EINVAL); 392 393 #ifdef __HAVE_CPU_MAXPROC 394 if (nmaxproc > cpu_maxproc()) 395 return (EINVAL); 396 #endif 397 maxproc = nmaxproc; 398 } 399 400 return (error); 401 } 402 case KERN_MAXFILES: 403 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 404 case KERN_ARGMAX: 405 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 406 case KERN_SECURELVL: 407 level = securelevel; 408 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 409 newp == NULL) 410 return (error); 411 if (level < securelevel && p->p_pid != 1) 412 return (EPERM); 413 securelevel = level; 414 return (0); 415 case KERN_HOSTNAME: 416 error = sysctl_string(oldp, oldlenp, newp, newlen, 417 hostname, sizeof(hostname)); 418 if (newp && !error) 419 hostnamelen = newlen; 420 return (error); 421 case KERN_DOMAINNAME: 422 error = sysctl_string(oldp, oldlenp, newp, newlen, 423 domainname, sizeof(domainname)); 424 if (newp && !error) 425 domainnamelen = newlen; 426 return (error); 427 case KERN_HOSTID: 428 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 429 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 430 if (newp && !error) 431 hostid = inthostid; 432 return (error); 433 case KERN_CLOCKRATE: 434 return (sysctl_clockrate(oldp, oldlenp)); 435 case KERN_BOOTTIME: 436 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 437 sizeof(struct timeval))); 438 case KERN_VNODE: 439 return (sysctl_vnode(oldp, oldlenp, p)); 440 case KERN_PROC: 441 case KERN_PROC2: 442 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 443 case KERN_LWP: 444 return (sysctl_dolwp(name, namelen, oldp, oldlenp)); 445 case KERN_PROC_ARGS: 446 return (sysctl_procargs(name + 1, namelen - 1, 447 oldp, oldlenp, p)); 448 case KERN_FILE: 449 return (sysctl_file(oldp, oldlenp)); 450 #ifdef GPROF 451 case KERN_PROF: 452 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 453 newp, newlen)); 454 #endif 455 case KERN_POSIX1: 456 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 457 case KERN_NGROUPS: 458 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 459 case KERN_JOB_CONTROL: 460 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 461 case KERN_SAVED_IDS: 462 #ifdef _POSIX_SAVED_IDS 463 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 464 #else 465 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 466 #endif 467 case KERN_MAXPARTITIONS: 468 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 469 case KERN_RAWPARTITION: 470 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 471 #ifdef NTP 472 case KERN_NTPTIME: 473 return (sysctl_ntptime(oldp, oldlenp)); 474 #endif 475 case KERN_AUTONICETIME: 476 old_autonicetime = autonicetime; 477 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 478 if (autonicetime < 0) 479 autonicetime = old_autonicetime; 480 return (error); 481 case KERN_AUTONICEVAL: 482 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 483 if (autoniceval < PRIO_MIN) 484 autoniceval = PRIO_MIN; 485 if (autoniceval > PRIO_MAX) 486 autoniceval = PRIO_MAX; 487 return (error); 488 case KERN_RTC_OFFSET: 489 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 490 case KERN_ROOT_DEVICE: 491 return (sysctl_rdstring(oldp, oldlenp, newp, 492 root_device->dv_xname)); 493 case KERN_ROOT_PARTITION: 494 return (sysctl_rdint(oldp, oldlenp, newp, DISKPART(rootdev))); 495 case KERN_MSGBUFSIZE: 496 /* 497 * deal with cases where the message buffer has 498 * become corrupted. 499 */ 500 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 501 msgbufenabled = 0; 502 return (ENXIO); 503 } 504 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 505 case KERN_FSYNC: 506 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 507 case KERN_SYSVMSG: 508 #ifdef SYSVMSG 509 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 510 #else 511 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 512 #endif 513 case KERN_SYSVSEM: 514 #ifdef SYSVSEM 515 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 516 #else 517 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 518 #endif 519 case KERN_SYSVSHM: 520 #ifdef SYSVSHM 521 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 522 #else 523 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 524 #endif 525 case KERN_DEFCORENAME: 526 if (newp && newlen < 1) 527 return (EINVAL); 528 error = sysctl_string(oldp, oldlenp, newp, newlen, 529 defcorename, sizeof(defcorename)); 530 return (error); 531 case KERN_SYNCHRONIZED_IO: 532 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 533 case KERN_IOV_MAX: 534 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 535 case KERN_MBUF: 536 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 537 newp, newlen)); 538 case KERN_MAPPED_FILES: 539 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 540 case KERN_MEMLOCK: 541 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 542 case KERN_MEMLOCK_RANGE: 543 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 544 case KERN_MEMORY_PROTECTION: 545 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 546 case KERN_LOGIN_NAME_MAX: 547 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 548 case KERN_LOGSIGEXIT: 549 return (sysctl_int(oldp, oldlenp, newp, newlen, 550 &kern_logsigexit)); 551 case KERN_FSCALE: 552 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 553 case KERN_CCPU: 554 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 555 case KERN_CP_TIME: 556 #ifndef MULTIPROCESSOR 557 return (sysctl_rdstruct(oldp, oldlenp, newp, 558 curcpu()->ci_schedstate.spc_cp_time, 559 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 560 #else 561 return (sysctl_docptime(oldp, oldlenp, newp)); 562 #endif 563 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 564 case KERN_SYSVIPC_INFO: 565 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 566 #endif 567 case KERN_MSGBUF: 568 return (sysctl_msgbuf(oldp, oldlenp)); 569 case KERN_CONSDEV: 570 if (cn_tab != NULL) 571 consdev = cn_tab->cn_dev; 572 else 573 consdev = NODEV; 574 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 575 sizeof consdev)); 576 #if NPTY > 0 577 case KERN_MAXPTYS: 578 return (sysctl_pty(oldp, oldlenp, newp, newlen)); 579 #endif 580 #ifndef PIPE_SOCKETPAIR 581 case KERN_PIPE: 582 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 583 newp, newlen)); 584 #endif 585 case KERN_MAXPHYS: 586 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 587 case KERN_SOMAXKVA: 588 { 589 int new_somaxkva = somaxkva; 590 591 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_somaxkva); 592 if (newp && !error) { 593 if (new_somaxkva < (16 * 1024 * 1024)) /* sanity */ 594 return (EINVAL); 595 somaxkva = new_somaxkva; 596 } 597 return (error); 598 } 599 case KERN_SBMAX: 600 { 601 int new_sbmax = sb_max; 602 603 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 604 if (newp && !error) { 605 if (new_sbmax < (16 * 1024)) /* sanity */ 606 return (EINVAL); 607 sb_max = new_sbmax; 608 } 609 return (error); 610 } 611 case KERN_TKSTAT: 612 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 613 newp)); 614 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 615 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 616 case KERN_URND: 617 #if NRND > 0 618 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 619 sizeof(v)) 620 return (sysctl_rdint(oldp, oldlenp, newp, v)); 621 else 622 return (EIO); /*XXX*/ 623 #else 624 return (EOPNOTSUPP); 625 #endif 626 case KERN_LABELSECTOR: 627 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 628 case KERN_LABELOFFSET: 629 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 630 case KERN_FORKFSLEEP: 631 { 632 /* userland sees value in ms, internally is in ticks */ 633 int timo, lsleep = forkfsleep * 1000 / hz; 634 635 error = sysctl_int(oldp, oldlenp, newp, newlen, &lsleep); 636 if (newp && !error) { 637 /* refuse negative values, and overly 'long time' */ 638 if (lsleep < 0 || lsleep > MAXSLP * 1000) 639 return (EINVAL); 640 641 timo = mstohz(lsleep); 642 643 /* if the interval is >0 ms && <1 tick, use 1 tick */ 644 if (lsleep != 0 && timo == 0) 645 forkfsleep = 1; 646 else 647 forkfsleep = timo; 648 } 649 return (error); 650 } 651 case KERN_POSIX_THREADS: /* XXX _POSIX_VERSION */ 652 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 653 case KERN_POSIX_SEMAPHORES: /* XXX _POSIX_VERSION */ 654 #ifdef P1003_1B_SEMAPHORE 655 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 656 #else 657 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 658 #endif 659 case KERN_POSIX_BARRIERS: /* XXX _POSIX_VERSION */ 660 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 661 case KERN_POSIX_TIMERS: /* XXX _POSIX_VERSION */ 662 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 663 case KERN_POSIX_SPIN_LOCKS: /* XXX _POSIX_VERSION */ 664 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 665 case KERN_POSIX_READER_WRITER_LOCKS: /* XXX _POSIX_VERSION */ 666 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 667 case KERN_DUMP_ON_PANIC: 668 return (sysctl_int(oldp, oldlenp, newp, newlen, &dumponpanic)); 669 670 case KERN_DRIVERS: 671 return (sysctl_drivers(oldp, oldlenp)); 672 673 default: 674 return (EOPNOTSUPP); 675 } 676 /* NOTREACHED */ 677 } 678 679 /* 680 * hardware related system variables. 681 */ 682 int 683 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 684 void *newp, size_t newlen, struct proc *p) 685 { 686 687 /* All sysctl names at this level, except for a few, are terminal. */ 688 switch (name[0]) { 689 case HW_DISKSTATS: 690 /* Not terminal. */ 691 break; 692 default: 693 if (namelen != 1) 694 return (ENOTDIR); /* overloaded */ 695 } 696 697 switch (name[0]) { 698 case HW_MACHINE: 699 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 700 case HW_MACHINE_ARCH: 701 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 702 case HW_MODEL: 703 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 704 case HW_NCPU: 705 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 706 case HW_BYTEORDER: 707 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 708 case HW_PHYSMEM: 709 { 710 u_int rval; 711 712 if ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) 713 rval = UINT_MAX; 714 else 715 rval = physmem * PAGE_SIZE; 716 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 717 } 718 case HW_PHYSMEM64: 719 return (sysctl_rdquad(oldp, oldlenp, newp, 720 (u_quad_t)physmem * PAGE_SIZE)); 721 case HW_USERMEM: 722 { 723 u_int rval; 724 725 if ((u_int)(physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 726 rval = UINT_MAX; 727 else 728 rval = (physmem - uvmexp.wired) * PAGE_SIZE; 729 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 730 } 731 case HW_USERMEM64: 732 return (sysctl_rdquad(oldp, oldlenp, newp, 733 (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE)); 734 case HW_PAGESIZE: 735 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 736 case HW_ALIGNBYTES: 737 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 738 case HW_DISKNAMES: 739 return (sysctl_disknames(oldp, oldlenp)); 740 case HW_DISKSTATS: 741 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 742 case HW_CNMAGIC: { 743 char magic[CNS_LEN]; 744 int error; 745 746 if (oldp) 747 cn_get_magic(magic, CNS_LEN); 748 error = sysctl_string(oldp, oldlenp, newp, newlen, 749 magic, sizeof(magic)); 750 if (newp && !error) { 751 error = cn_set_magic(magic); 752 } 753 return (error); 754 } 755 default: 756 return (EOPNOTSUPP); 757 } 758 /* NOTREACHED */ 759 } 760 761 #ifdef DEBUG 762 /* 763 * Debugging related system variables. 764 */ 765 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 766 struct ctldebug debug5, debug6, debug7, debug8, debug9; 767 struct ctldebug debug10, debug11, debug12, debug13, debug14; 768 struct ctldebug debug15, debug16, debug17, debug18, debug19; 769 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 770 &debug0, &debug1, &debug2, &debug3, &debug4, 771 &debug5, &debug6, &debug7, &debug8, &debug9, 772 &debug10, &debug11, &debug12, &debug13, &debug14, 773 &debug15, &debug16, &debug17, &debug18, &debug19, 774 }; 775 776 int 777 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 778 void *newp, size_t newlen, struct proc *p) 779 { 780 struct ctldebug *cdp; 781 782 /* all sysctl names at this level are name and field */ 783 if (namelen != 2) 784 return (ENOTDIR); /* overloaded */ 785 if (name[0] < 0 || name[0] >= CTL_DEBUG_MAXID) 786 return (EOPNOTSUPP); 787 cdp = debugvars[name[0]]; 788 if (cdp->debugname == 0) 789 return (EOPNOTSUPP); 790 switch (name[1]) { 791 case CTL_DEBUG_NAME: 792 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 793 case CTL_DEBUG_VALUE: 794 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 795 default: 796 return (EOPNOTSUPP); 797 } 798 /* NOTREACHED */ 799 } 800 #endif /* DEBUG */ 801 802 int 803 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 804 void *newp, size_t newlen, struct proc *p) 805 { 806 struct proc *ptmp = NULL; 807 int error = 0; 808 struct rlimit alim; 809 struct plimit *newplim; 810 char *tmps = NULL; 811 size_t len, curlen; 812 u_int i; 813 int si; 814 815 if (namelen < 2) 816 return (EINVAL); 817 818 if (name[0] == PROC_CURPROC) { 819 ptmp = p; 820 } else if ((ptmp = pfind((pid_t)name[0])) == NULL) { 821 return (ESRCH); 822 } else { 823 if (p->p_ucred->cr_uid != 0) { 824 if (p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 825 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 826 return (EPERM); 827 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 828 return (EPERM); /* sgid proc */ 829 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 830 if (p->p_ucred->cr_groups[i] == 831 ptmp->p_cred->p_rgid) 832 break; 833 } 834 if (i == p->p_ucred->cr_ngroups) 835 return (EPERM); 836 } 837 } 838 switch (name[1]) { 839 case PROC_PID_STOPFORK: 840 if (namelen != 2) 841 return (EINVAL); 842 si = ((ptmp->p_flag & P_STOPFORK) != 0); 843 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &si)) != 0) 844 return (error); 845 if (si != 0) 846 ptmp->p_flag |= P_STOPFORK; 847 else 848 ptmp->p_flag &= ~P_STOPFORK; 849 return (0); 850 break; 851 852 case PROC_PID_STOPEXEC: 853 if (namelen != 2) 854 return (EINVAL); 855 si = ((ptmp->p_flag & P_STOPEXEC) != 0); 856 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &si)) != 0) 857 return (error); 858 if (si != 0) 859 ptmp->p_flag |= P_STOPEXEC; 860 else 861 ptmp->p_flag &= ~P_STOPEXEC; 862 return (0); 863 break; 864 865 case PROC_PID_CORENAME: 866 if (namelen != 2) 867 return (EINVAL); 868 /* 869 * Can't use sysctl_string() here because we may malloc a new 870 * area during the process, so we have to do it by hand. 871 */ 872 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 873 if (oldlenp && *oldlenp < curlen) { 874 if (!oldp) 875 *oldlenp = curlen; 876 return (ENOMEM); 877 } 878 if (newp) { 879 if (securelevel > 2) 880 return (EPERM); 881 if (newlen > MAXPATHLEN) 882 return (ENAMETOOLONG); 883 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 884 if (tmps == NULL) 885 return (ENOMEM); 886 error = copyin(newp, tmps, newlen + 1); 887 tmps[newlen] = '\0'; 888 if (error) 889 goto cleanup; 890 /* Enforce to be either 'core' for end with '.core' */ 891 if (newlen < 4) { /* c.o.r.e */ 892 error = EINVAL; 893 goto cleanup; 894 } 895 len = newlen - 4; 896 if (len > 0) { 897 if (tmps[len - 1] != '.' && 898 tmps[len - 1] != '/') { 899 error = EINVAL; 900 goto cleanup; 901 } 902 } 903 if (strcmp(&tmps[len], "core") != 0) { 904 error = EINVAL; 905 goto cleanup; 906 } 907 } 908 if (oldp && oldlenp) { 909 *oldlenp = curlen; 910 error = copyout(ptmp->p_limit->pl_corename, oldp, 911 curlen); 912 } 913 if (newp && error == 0) { 914 /* if the 2 strings are identical, don't limcopy() */ 915 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 916 error = 0; 917 goto cleanup; 918 } 919 if (ptmp->p_limit->p_refcnt > 1 && 920 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 921 newplim = limcopy(ptmp->p_limit); 922 limfree(ptmp->p_limit); 923 ptmp->p_limit = newplim; 924 } 925 if (ptmp->p_limit->pl_corename != defcorename) { 926 free(ptmp->p_limit->pl_corename, M_TEMP); 927 } 928 ptmp->p_limit->pl_corename = tmps; 929 return (0); 930 } 931 cleanup: 932 if (tmps) 933 free(tmps, M_TEMP); 934 return (error); 935 break; 936 937 case PROC_PID_LIMIT: 938 if (namelen != 4 || name[2] < 1 || 939 name[2] >= PROC_PID_LIMIT_MAXID) 940 return (EINVAL); 941 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 942 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 943 error = sysctl_quad(oldp, oldlenp, newp, newlen, 944 &alim.rlim_max); 945 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 946 error = sysctl_quad(oldp, oldlenp, newp, newlen, 947 &alim.rlim_cur); 948 else 949 error = (EINVAL); 950 951 if (error) 952 return (error); 953 954 if (newp) 955 error = dosetrlimit(ptmp, p->p_cred, 956 name[2] - 1, &alim); 957 return (error); 958 break; 959 960 default: 961 return (EINVAL); 962 break; 963 } 964 /* NOTREACHED */ 965 return (EINVAL); 966 } 967 968 int 969 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 970 void *newp, size_t newlen, struct proc *p) 971 { 972 static struct { 973 const char *name; 974 int type; 975 } emulations[] = CTL_EMUL_NAMES; 976 const struct emul *e; 977 const char *ename; 978 #ifdef LKM 979 extern struct lock exec_lock; /* XXX */ 980 int error; 981 #else 982 extern int nexecs_builtin; 983 extern const struct execsw execsw_builtin[]; 984 int i; 985 #endif 986 987 /* all sysctl names at this level are name and field */ 988 if (namelen < 2) 989 return (ENOTDIR); /* overloaded */ 990 991 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 992 return (EOPNOTSUPP); 993 994 ename = emulations[name[0]].name; 995 996 #ifdef LKM 997 lockmgr(&exec_lock, LK_SHARED, NULL); 998 if ((e = emul_search(ename))) { 999 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1000 newp, newlen, p); 1001 } else 1002 error = EOPNOTSUPP; 1003 lockmgr(&exec_lock, LK_RELEASE, NULL); 1004 1005 return (error); 1006 #else 1007 for (i = 0; i < nexecs_builtin; i++) { 1008 e = execsw_builtin[i].es_emul; 1009 /* 1010 * In order to match e.g. e->e_name "irix o32" 1011 * with ename "irix", we limit the comparison 1012 * to the length of ename. 1013 */ 1014 if (e == NULL || 1015 strncmp(ename, e->e_name, strlen(ename)) != 0 || 1016 e->e_sysctl == NULL) 1017 continue; 1018 1019 return ((*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1020 newp, newlen, p)); 1021 } 1022 1023 return (EOPNOTSUPP); 1024 #endif 1025 } 1026 /* 1027 * Convenience macros. 1028 */ 1029 1030 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 1031 if (oldlenp) { \ 1032 if (!oldp) \ 1033 *oldlenp = len; \ 1034 else { \ 1035 if (*oldlenp < len) \ 1036 return (ENOMEM); \ 1037 *oldlenp = len; \ 1038 error = copyout(valp, oldp, len); \ 1039 } \ 1040 } 1041 1042 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 1043 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 1044 1045 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 1046 if (newp && newlen != len) \ 1047 return (EINVAL); 1048 1049 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1050 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1051 1052 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1053 if (error == 0 && newp) \ 1054 error = copyin(newp, valp, len); 1055 1056 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1057 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1058 1059 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1060 if (oldlenp) { \ 1061 len = strlen(str) + 1; \ 1062 if (!oldp) \ 1063 *oldlenp = len; \ 1064 else { \ 1065 if (*oldlenp < len) { \ 1066 err2 = ENOMEM; \ 1067 len = *oldlenp; \ 1068 } else \ 1069 *oldlenp = len; \ 1070 error = copyout(str, oldp, len);\ 1071 if (error == 0) \ 1072 error = err2; \ 1073 } \ 1074 } 1075 1076 /* 1077 * Validate parameters and get old / set new parameters 1078 * for an integer-valued sysctl function. 1079 */ 1080 int 1081 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1082 { 1083 int error = 0; 1084 1085 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1086 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1087 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1088 1089 return (error); 1090 } 1091 1092 1093 /* 1094 * As above, but read-only. 1095 */ 1096 int 1097 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1098 { 1099 int error = 0; 1100 1101 if (newp) 1102 return (EPERM); 1103 1104 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1105 1106 return (error); 1107 } 1108 1109 /* 1110 * Validate parameters and get old / set new parameters 1111 * for an quad-valued sysctl function. 1112 */ 1113 int 1114 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1115 quad_t *valp) 1116 { 1117 int error = 0; 1118 1119 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1120 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1121 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1122 1123 return (error); 1124 } 1125 1126 /* 1127 * As above, but read-only. 1128 */ 1129 int 1130 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1131 { 1132 int error = 0; 1133 1134 if (newp) 1135 return (EPERM); 1136 1137 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1138 1139 return (error); 1140 } 1141 1142 /* 1143 * Validate parameters and get old / set new parameters 1144 * for a string-valued sysctl function. 1145 */ 1146 int 1147 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1148 size_t maxlen) 1149 { 1150 int error = 0, err2 = 0; 1151 size_t len; 1152 1153 if (newp && newlen >= maxlen) 1154 return (EINVAL); 1155 1156 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1157 1158 if (error == 0 && newp) { 1159 error = copyin(newp, str, newlen); 1160 str[newlen] = 0; 1161 } 1162 return (error); 1163 } 1164 1165 /* 1166 * As above, but read-only. 1167 */ 1168 int 1169 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1170 { 1171 int error = 0, err2 = 0; 1172 size_t len; 1173 1174 if (newp) 1175 return (EPERM); 1176 1177 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1178 1179 return (error); 1180 } 1181 1182 /* 1183 * Validate parameters and get old / set new parameters 1184 * for a structure oriented sysctl function. 1185 */ 1186 int 1187 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1188 size_t len) 1189 { 1190 int error = 0; 1191 1192 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1193 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1194 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1195 1196 return (error); 1197 } 1198 1199 /* 1200 * Validate parameters and get old parameters 1201 * for a structure oriented sysctl function. 1202 */ 1203 int 1204 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1205 size_t len) 1206 { 1207 int error = 0; 1208 1209 if (newp) 1210 return (EPERM); 1211 1212 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1213 1214 return (error); 1215 } 1216 1217 /* 1218 * As above, but can return a truncated result. 1219 */ 1220 int 1221 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1222 size_t len) 1223 { 1224 int error = 0; 1225 1226 if (newp) 1227 return (EPERM); 1228 1229 len = min(*oldlenp, len); 1230 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1231 1232 return (error); 1233 } 1234 1235 /* 1236 * Get file structures. 1237 */ 1238 static int 1239 sysctl_file(void *vwhere, size_t *sizep) 1240 { 1241 int error; 1242 size_t buflen; 1243 struct file *fp; 1244 char *start, *where; 1245 1246 start = where = vwhere; 1247 buflen = *sizep; 1248 if (where == NULL) { 1249 /* 1250 * overestimate by 10 files 1251 */ 1252 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1253 return (0); 1254 } 1255 1256 /* 1257 * first copyout filehead 1258 */ 1259 if (buflen < sizeof(filehead)) { 1260 *sizep = 0; 1261 return (0); 1262 } 1263 error = copyout(&filehead, where, sizeof(filehead)); 1264 if (error) 1265 return (error); 1266 buflen -= sizeof(filehead); 1267 where += sizeof(filehead); 1268 1269 /* 1270 * followed by an array of file structures 1271 */ 1272 LIST_FOREACH(fp, &filehead, f_list) { 1273 if (buflen < sizeof(struct file)) { 1274 *sizep = where - start; 1275 return (ENOMEM); 1276 } 1277 error = copyout(fp, where, sizeof(struct file)); 1278 if (error) 1279 return (error); 1280 buflen -= sizeof(struct file); 1281 where += sizeof(struct file); 1282 } 1283 *sizep = where - start; 1284 return (0); 1285 } 1286 1287 /* 1288 * Get driver names and majors 1289 */ 1290 static int 1291 sysctl_drivers(void *vwhere, size_t *sizep) 1292 { 1293 int error; 1294 size_t buflen; 1295 struct kinfo_drivers kd; 1296 char *start, *where; 1297 const char *name; 1298 int i; 1299 extern struct devsw_conv *devsw_conv; 1300 extern int max_devsw_convs; 1301 1302 start = where = vwhere; 1303 buflen = *sizep; 1304 if (where == NULL) { 1305 *sizep = max_devsw_convs * sizeof kd; 1306 return 0; 1307 } 1308 1309 /* 1310 * An array of kinfo_drivers structures 1311 */ 1312 error = 0; 1313 for (i = 0; i < max_devsw_convs; i++) { 1314 name = devsw_conv[i].d_name; 1315 if (name == NULL) 1316 continue; 1317 if (buflen < sizeof kd) { 1318 error = ENOMEM; 1319 break; 1320 } 1321 kd.d_bmajor = devsw_conv[i].d_bmajor; 1322 kd.d_cmajor = devsw_conv[i].d_cmajor; 1323 strlcpy(kd.d_name, name, sizeof kd.d_name); 1324 error = copyout(&kd, where, sizeof kd); 1325 if (error != 0) 1326 break; 1327 buflen -= sizeof kd; 1328 where += sizeof kd; 1329 } 1330 *sizep = where - start; 1331 return error; 1332 } 1333 1334 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1335 #define FILL_PERM(src, dst) do { \ 1336 (dst)._key = (src)._key; \ 1337 (dst).uid = (src).uid; \ 1338 (dst).gid = (src).gid; \ 1339 (dst).cuid = (src).cuid; \ 1340 (dst).cgid = (src).cgid; \ 1341 (dst).mode = (src).mode; \ 1342 (dst)._seq = (src)._seq; \ 1343 } while (/*CONSTCOND*/ 0); 1344 #define FILL_MSG(src, dst) do { \ 1345 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1346 (dst).msg_qnum = (src).msg_qnum; \ 1347 (dst).msg_qbytes = (src).msg_qbytes; \ 1348 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1349 (dst).msg_lspid = (src).msg_lspid; \ 1350 (dst).msg_lrpid = (src).msg_lrpid; \ 1351 (dst).msg_stime = (src).msg_stime; \ 1352 (dst).msg_rtime = (src).msg_rtime; \ 1353 (dst).msg_ctime = (src).msg_ctime; \ 1354 } while (/*CONSTCOND*/ 0) 1355 #define FILL_SEM(src, dst) do { \ 1356 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1357 (dst).sem_nsems = (src).sem_nsems; \ 1358 (dst).sem_otime = (src).sem_otime; \ 1359 (dst).sem_ctime = (src).sem_ctime; \ 1360 } while (/*CONSTCOND*/ 0) 1361 #define FILL_SHM(src, dst) do { \ 1362 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1363 (dst).shm_segsz = (src).shm_segsz; \ 1364 (dst).shm_lpid = (src).shm_lpid; \ 1365 (dst).shm_cpid = (src).shm_cpid; \ 1366 (dst).shm_atime = (src).shm_atime; \ 1367 (dst).shm_dtime = (src).shm_dtime; \ 1368 (dst).shm_ctime = (src).shm_ctime; \ 1369 (dst).shm_nattch = (src).shm_nattch; \ 1370 } while (/*CONSTCOND*/ 0) 1371 1372 static int 1373 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1374 { 1375 #ifdef SYSVMSG 1376 struct msg_sysctl_info *msgsi = NULL; 1377 #endif 1378 #ifdef SYSVSEM 1379 struct sem_sysctl_info *semsi = NULL; 1380 #endif 1381 #ifdef SYSVSHM 1382 struct shm_sysctl_info *shmsi = NULL; 1383 #endif 1384 size_t infosize, dssize, tsize, buflen; 1385 void *buf = NULL; 1386 char *start; 1387 int32_t nds; 1388 int i, error, ret; 1389 1390 if (namelen != 1) 1391 return (EINVAL); 1392 1393 start = where; 1394 buflen = *sizep; 1395 1396 switch (*name) { 1397 case KERN_SYSVIPC_MSG_INFO: 1398 #ifdef SYSVMSG 1399 infosize = sizeof(msgsi->msginfo); 1400 nds = msginfo.msgmni; 1401 dssize = sizeof(msgsi->msgids[0]); 1402 break; 1403 #else 1404 return (EINVAL); 1405 #endif 1406 case KERN_SYSVIPC_SEM_INFO: 1407 #ifdef SYSVSEM 1408 infosize = sizeof(semsi->seminfo); 1409 nds = seminfo.semmni; 1410 dssize = sizeof(semsi->semids[0]); 1411 break; 1412 #else 1413 return (EINVAL); 1414 #endif 1415 case KERN_SYSVIPC_SHM_INFO: 1416 #ifdef SYSVSHM 1417 infosize = sizeof(shmsi->shminfo); 1418 nds = shminfo.shmmni; 1419 dssize = sizeof(shmsi->shmids[0]); 1420 break; 1421 #else 1422 return (EINVAL); 1423 #endif 1424 default: 1425 return (EINVAL); 1426 } 1427 /* 1428 * Round infosize to 64 bit boundary if requesting more than just 1429 * the info structure or getting the total data size. 1430 */ 1431 if (where == NULL || *sizep > infosize) 1432 infosize = ((infosize + 7) / 8) * 8; 1433 tsize = infosize + nds * dssize; 1434 1435 /* Return just the total size required. */ 1436 if (where == NULL) { 1437 *sizep = tsize; 1438 return (0); 1439 } 1440 1441 /* Not enough room for even the info struct. */ 1442 if (buflen < infosize) { 1443 *sizep = 0; 1444 return (ENOMEM); 1445 } 1446 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1447 memset(buf, 0, min(tsize, buflen)); 1448 1449 switch (*name) { 1450 #ifdef SYSVMSG 1451 case KERN_SYSVIPC_MSG_INFO: 1452 msgsi = (struct msg_sysctl_info *)buf; 1453 msgsi->msginfo = msginfo; 1454 break; 1455 #endif 1456 #ifdef SYSVSEM 1457 case KERN_SYSVIPC_SEM_INFO: 1458 semsi = (struct sem_sysctl_info *)buf; 1459 semsi->seminfo = seminfo; 1460 break; 1461 #endif 1462 #ifdef SYSVSHM 1463 case KERN_SYSVIPC_SHM_INFO: 1464 shmsi = (struct shm_sysctl_info *)buf; 1465 shmsi->shminfo = shminfo; 1466 break; 1467 #endif 1468 } 1469 buflen -= infosize; 1470 1471 ret = 0; 1472 if (buflen > 0) { 1473 /* Fill in the IPC data structures. */ 1474 for (i = 0; i < nds; i++) { 1475 if (buflen < dssize) { 1476 ret = ENOMEM; 1477 break; 1478 } 1479 switch (*name) { 1480 #ifdef SYSVMSG 1481 case KERN_SYSVIPC_MSG_INFO: 1482 FILL_MSG(msqids[i], msgsi->msgids[i]); 1483 break; 1484 #endif 1485 #ifdef SYSVSEM 1486 case KERN_SYSVIPC_SEM_INFO: 1487 FILL_SEM(sema[i], semsi->semids[i]); 1488 break; 1489 #endif 1490 #ifdef SYSVSHM 1491 case KERN_SYSVIPC_SHM_INFO: 1492 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1493 break; 1494 #endif 1495 } 1496 buflen -= dssize; 1497 } 1498 } 1499 *sizep -= buflen; 1500 error = copyout(buf, start, *sizep); 1501 /* If copyout succeeded, use return code set earlier. */ 1502 if (error == 0) 1503 error = ret; 1504 if (buf) 1505 free(buf, M_TEMP); 1506 return (error); 1507 } 1508 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1509 1510 static int 1511 sysctl_msgbuf(void *vwhere, size_t *sizep) 1512 { 1513 char *where = vwhere; 1514 size_t len, maxlen = *sizep; 1515 long beg, end; 1516 int error; 1517 1518 /* 1519 * deal with cases where the message buffer has 1520 * become corrupted. 1521 */ 1522 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1523 msgbufenabled = 0; 1524 return (ENXIO); 1525 } 1526 1527 if (where == NULL) { 1528 /* always return full buffer size */ 1529 *sizep = msgbufp->msg_bufs; 1530 return (0); 1531 } 1532 1533 error = 0; 1534 maxlen = min(msgbufp->msg_bufs, maxlen); 1535 1536 /* 1537 * First, copy from the write pointer to the end of 1538 * message buffer. 1539 */ 1540 beg = msgbufp->msg_bufx; 1541 end = msgbufp->msg_bufs; 1542 while (maxlen > 0) { 1543 len = min(end - beg, maxlen); 1544 if (len == 0) 1545 break; 1546 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1547 if (error) 1548 break; 1549 where += len; 1550 maxlen -= len; 1551 1552 /* 1553 * ... then, copy from the beginning of message buffer to 1554 * the write pointer. 1555 */ 1556 beg = 0; 1557 end = msgbufp->msg_bufx; 1558 } 1559 return (error); 1560 } 1561 1562 /* 1563 * try over estimating by 5 procs 1564 */ 1565 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1566 1567 static int 1568 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1569 { 1570 struct eproc eproc; 1571 struct kinfo_proc2 kproc2; 1572 struct kinfo_proc *dp; 1573 struct proc *p; 1574 const struct proclist_desc *pd; 1575 char *where, *dp2; 1576 int type, op, arg; 1577 u_int elem_size, elem_count; 1578 size_t buflen, needed; 1579 int error; 1580 1581 dp = vwhere; 1582 dp2 = where = vwhere; 1583 buflen = where != NULL ? *sizep : 0; 1584 error = 0; 1585 needed = 0; 1586 type = name[0]; 1587 1588 if (type == KERN_PROC) { 1589 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1590 return (EINVAL); 1591 op = name[1]; 1592 if (op != KERN_PROC_ALL) 1593 arg = name[2]; 1594 else 1595 arg = 0; /* Quell compiler warning */ 1596 elem_size = elem_count = 0; /* Ditto */ 1597 } else { 1598 if (namelen != 5) 1599 return (EINVAL); 1600 op = name[1]; 1601 arg = name[2]; 1602 elem_size = name[3]; 1603 elem_count = name[4]; 1604 } 1605 1606 proclist_lock_read(); 1607 1608 pd = proclists; 1609 again: 1610 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1611 /* 1612 * Skip embryonic processes. 1613 */ 1614 if (p->p_stat == SIDL) 1615 continue; 1616 /* 1617 * TODO - make more efficient (see notes below). 1618 * do by session. 1619 */ 1620 switch (op) { 1621 1622 case KERN_PROC_PID: 1623 /* could do this with just a lookup */ 1624 if (p->p_pid != (pid_t)arg) 1625 continue; 1626 break; 1627 1628 case KERN_PROC_PGRP: 1629 /* could do this by traversing pgrp */ 1630 if (p->p_pgrp->pg_id != (pid_t)arg) 1631 continue; 1632 break; 1633 1634 case KERN_PROC_SESSION: 1635 if (p->p_session->s_sid != (pid_t)arg) 1636 continue; 1637 break; 1638 1639 case KERN_PROC_TTY: 1640 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1641 if ((p->p_flag & P_CONTROLT) == 0 || 1642 p->p_session->s_ttyp == NULL || 1643 p->p_session->s_ttyvp != NULL) 1644 continue; 1645 } else if ((p->p_flag & P_CONTROLT) == 0 || 1646 p->p_session->s_ttyp == NULL) { 1647 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1648 continue; 1649 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1650 continue; 1651 break; 1652 1653 case KERN_PROC_UID: 1654 if (p->p_ucred->cr_uid != (uid_t)arg) 1655 continue; 1656 break; 1657 1658 case KERN_PROC_RUID: 1659 if (p->p_cred->p_ruid != (uid_t)arg) 1660 continue; 1661 break; 1662 1663 case KERN_PROC_GID: 1664 if (p->p_ucred->cr_gid != (uid_t)arg) 1665 continue; 1666 break; 1667 1668 case KERN_PROC_RGID: 1669 if (p->p_cred->p_rgid != (uid_t)arg) 1670 continue; 1671 break; 1672 1673 case KERN_PROC_ALL: 1674 /* allow everything */ 1675 break; 1676 1677 default: 1678 error = EINVAL; 1679 goto cleanup; 1680 } 1681 if (type == KERN_PROC) { 1682 if (buflen >= sizeof(struct kinfo_proc)) { 1683 fill_eproc(p, &eproc); 1684 error = copyout(p, &dp->kp_proc, 1685 sizeof(struct proc)); 1686 if (error) 1687 goto cleanup; 1688 error = copyout(&eproc, &dp->kp_eproc, 1689 sizeof(eproc)); 1690 if (error) 1691 goto cleanup; 1692 dp++; 1693 buflen -= sizeof(struct kinfo_proc); 1694 } 1695 needed += sizeof(struct kinfo_proc); 1696 } else { /* KERN_PROC2 */ 1697 if (buflen >= elem_size && elem_count > 0) { 1698 fill_kproc2(p, &kproc2); 1699 /* 1700 * Copy out elem_size, but not larger than 1701 * the size of a struct kinfo_proc2. 1702 */ 1703 error = copyout(&kproc2, dp2, 1704 min(sizeof(kproc2), elem_size)); 1705 if (error) 1706 goto cleanup; 1707 dp2 += elem_size; 1708 buflen -= elem_size; 1709 elem_count--; 1710 } 1711 needed += elem_size; 1712 } 1713 } 1714 pd++; 1715 if (pd->pd_list != NULL) 1716 goto again; 1717 proclist_unlock_read(); 1718 1719 if (where != NULL) { 1720 if (type == KERN_PROC) 1721 *sizep = (char *)dp - where; 1722 else 1723 *sizep = dp2 - where; 1724 if (needed > *sizep) 1725 return (ENOMEM); 1726 } else { 1727 needed += KERN_PROCSLOP; 1728 *sizep = needed; 1729 } 1730 return (0); 1731 cleanup: 1732 proclist_unlock_read(); 1733 return (error); 1734 } 1735 1736 1737 /* 1738 * try over estimating by 5 LWPs 1739 */ 1740 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1741 1742 static int 1743 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1744 { 1745 struct kinfo_lwp klwp; 1746 struct proc *p; 1747 struct lwp *l; 1748 char *where, *dp; 1749 int type, pid, elem_size, elem_count; 1750 int buflen, needed, error; 1751 1752 dp = where = vwhere; 1753 buflen = where != NULL ? *sizep : 0; 1754 error = needed = 0; 1755 type = name[0]; 1756 1757 if (namelen != 4) 1758 return (EINVAL); 1759 pid = name[1]; 1760 elem_size = name[2]; 1761 elem_count = name[3]; 1762 1763 p = pfind(pid); 1764 if (p == NULL) 1765 return (ESRCH); 1766 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1767 if (buflen >= elem_size && elem_count > 0) { 1768 fill_lwp(l, &klwp); 1769 /* 1770 * Copy out elem_size, but not larger than 1771 * the size of a struct kinfo_proc2. 1772 */ 1773 error = copyout(&klwp, dp, 1774 min(sizeof(klwp), elem_size)); 1775 if (error) 1776 goto cleanup; 1777 dp += elem_size; 1778 buflen -= elem_size; 1779 elem_count--; 1780 } 1781 needed += elem_size; 1782 } 1783 1784 if (where != NULL) { 1785 *sizep = dp - where; 1786 if (needed > *sizep) 1787 return (ENOMEM); 1788 } else { 1789 needed += KERN_PROCSLOP; 1790 *sizep = needed; 1791 } 1792 return (0); 1793 cleanup: 1794 return (error); 1795 } 1796 1797 /* 1798 * Fill in an eproc structure for the specified process. 1799 */ 1800 void 1801 fill_eproc(struct proc *p, struct eproc *ep) 1802 { 1803 struct tty *tp; 1804 struct lwp *l; 1805 1806 ep->e_paddr = p; 1807 ep->e_sess = p->p_session; 1808 ep->e_pcred = *p->p_cred; 1809 ep->e_ucred = *p->p_ucred; 1810 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1811 ep->e_vm.vm_rssize = 0; 1812 ep->e_vm.vm_tsize = 0; 1813 ep->e_vm.vm_dsize = 0; 1814 ep->e_vm.vm_ssize = 0; 1815 /* ep->e_vm.vm_pmap = XXX; */ 1816 } else { 1817 struct vmspace *vm = p->p_vmspace; 1818 1819 ep->e_vm.vm_rssize = vm_resident_count(vm); 1820 ep->e_vm.vm_tsize = vm->vm_tsize; 1821 ep->e_vm.vm_dsize = vm->vm_dsize; 1822 ep->e_vm.vm_ssize = vm->vm_ssize; 1823 1824 /* Pick a "representative" LWP */ 1825 l = proc_representative_lwp(p); 1826 1827 if (l->l_wmesg) 1828 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1829 } 1830 if (p->p_pptr) 1831 ep->e_ppid = p->p_pptr->p_pid; 1832 else 1833 ep->e_ppid = 0; 1834 ep->e_pgid = p->p_pgrp->pg_id; 1835 ep->e_sid = ep->e_sess->s_sid; 1836 ep->e_jobc = p->p_pgrp->pg_jobc; 1837 if ((p->p_flag & P_CONTROLT) && 1838 (tp = ep->e_sess->s_ttyp)) { 1839 ep->e_tdev = tp->t_dev; 1840 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1841 ep->e_tsess = tp->t_session; 1842 } else 1843 ep->e_tdev = NODEV; 1844 1845 ep->e_xsize = ep->e_xrssize = 0; 1846 ep->e_xccount = ep->e_xswrss = 0; 1847 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1848 if (SESS_LEADER(p)) 1849 ep->e_flag |= EPROC_SLEADER; 1850 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1851 } 1852 1853 /* 1854 * Fill in an eproc structure for the specified process. 1855 */ 1856 static void 1857 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1858 { 1859 struct tty *tp; 1860 struct lwp *l; 1861 struct timeval ut, st; 1862 1863 memset(ki, 0, sizeof(*ki)); 1864 1865 ki->p_paddr = PTRTOINT64(p); 1866 ki->p_fd = PTRTOINT64(p->p_fd); 1867 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1868 ki->p_stats = PTRTOINT64(p->p_stats); 1869 ki->p_limit = PTRTOINT64(p->p_limit); 1870 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1871 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1872 ki->p_sess = PTRTOINT64(p->p_session); 1873 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1874 ki->p_ru = PTRTOINT64(p->p_ru); 1875 1876 ki->p_eflag = 0; 1877 ki->p_exitsig = p->p_exitsig; 1878 ki->p_flag = p->p_flag; 1879 1880 ki->p_pid = p->p_pid; 1881 if (p->p_pptr) 1882 ki->p_ppid = p->p_pptr->p_pid; 1883 else 1884 ki->p_ppid = 0; 1885 ki->p_sid = p->p_session->s_sid; 1886 ki->p__pgid = p->p_pgrp->pg_id; 1887 1888 ki->p_tpgid = NO_PGID; /* may be changed if controlling tty below */ 1889 1890 ki->p_uid = p->p_ucred->cr_uid; 1891 ki->p_ruid = p->p_cred->p_ruid; 1892 ki->p_gid = p->p_ucred->cr_gid; 1893 ki->p_rgid = p->p_cred->p_rgid; 1894 ki->p_svuid = p->p_cred->p_svuid; 1895 ki->p_svgid = p->p_cred->p_svgid; 1896 1897 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1898 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1899 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1900 1901 ki->p_jobc = p->p_pgrp->pg_jobc; 1902 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1903 ki->p_tdev = tp->t_dev; 1904 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1905 ki->p_tsess = PTRTOINT64(tp->t_session); 1906 } else { 1907 ki->p_tdev = NODEV; 1908 } 1909 1910 ki->p_estcpu = p->p_estcpu; 1911 ki->p_rtime_sec = p->p_rtime.tv_sec; 1912 ki->p_rtime_usec = p->p_rtime.tv_usec; 1913 ki->p_cpticks = p->p_cpticks; 1914 ki->p_pctcpu = p->p_pctcpu; 1915 1916 ki->p_uticks = p->p_uticks; 1917 ki->p_sticks = p->p_sticks; 1918 ki->p_iticks = p->p_iticks; 1919 1920 ki->p_tracep = PTRTOINT64(p->p_tracep); 1921 ki->p_traceflag = p->p_traceflag; 1922 1923 1924 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1925 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1926 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1927 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1928 1929 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1930 ki->p_realstat = p->p_stat; 1931 ki->p_nice = p->p_nice; 1932 1933 ki->p_xstat = p->p_xstat; 1934 ki->p_acflag = p->p_acflag; 1935 1936 strncpy(ki->p_comm, p->p_comm, 1937 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1938 1939 strncpy(ki->p_login, p->p_session->s_login, 1940 min(sizeof ki->p_login - 1, sizeof p->p_session->s_login)); 1941 1942 ki->p_nlwps = p->p_nlwps; 1943 ki->p_nrlwps = p->p_nrlwps; 1944 ki->p_realflag = p->p_flag; 1945 1946 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1947 ki->p_vm_rssize = 0; 1948 ki->p_vm_tsize = 0; 1949 ki->p_vm_dsize = 0; 1950 ki->p_vm_ssize = 0; 1951 l = NULL; 1952 } else { 1953 struct vmspace *vm = p->p_vmspace; 1954 1955 ki->p_vm_rssize = vm_resident_count(vm); 1956 ki->p_vm_tsize = vm->vm_tsize; 1957 ki->p_vm_dsize = vm->vm_dsize; 1958 ki->p_vm_ssize = vm->vm_ssize; 1959 1960 /* Pick a "representative" LWP */ 1961 l = proc_representative_lwp(p); 1962 ki->p_forw = PTRTOINT64(l->l_forw); 1963 ki->p_back = PTRTOINT64(l->l_back); 1964 ki->p_addr = PTRTOINT64(l->l_addr); 1965 ki->p_stat = l->l_stat; 1966 ki->p_flag |= l->l_flag; 1967 ki->p_swtime = l->l_swtime; 1968 ki->p_slptime = l->l_slptime; 1969 if (l->l_stat == LSONPROC) { 1970 KDASSERT(l->l_cpu != NULL); 1971 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1972 } else 1973 ki->p_schedflags = 0; 1974 ki->p_holdcnt = l->l_holdcnt; 1975 ki->p_priority = l->l_priority; 1976 ki->p_usrpri = l->l_usrpri; 1977 if (l->l_wmesg) 1978 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1979 ki->p_wchan = PTRTOINT64(l->l_wchan); 1980 1981 } 1982 1983 if (p->p_session->s_ttyvp) 1984 ki->p_eflag |= EPROC_CTTY; 1985 if (SESS_LEADER(p)) 1986 ki->p_eflag |= EPROC_SLEADER; 1987 1988 /* XXX Is this double check necessary? */ 1989 if (P_ZOMBIE(p)) { 1990 ki->p_uvalid = 0; 1991 } else { 1992 ki->p_uvalid = 1; 1993 1994 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1995 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1996 1997 calcru(p, &ut, &st, 0); 1998 ki->p_uutime_sec = ut.tv_sec; 1999 ki->p_uutime_usec = ut.tv_usec; 2000 ki->p_ustime_sec = st.tv_sec; 2001 ki->p_ustime_usec = st.tv_usec; 2002 2003 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 2004 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 2005 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 2006 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 2007 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 2008 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 2009 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 2010 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 2011 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 2012 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 2013 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 2014 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 2015 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 2016 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 2017 2018 timeradd(&p->p_stats->p_cru.ru_utime, 2019 &p->p_stats->p_cru.ru_stime, &ut); 2020 ki->p_uctime_sec = ut.tv_sec; 2021 ki->p_uctime_usec = ut.tv_usec; 2022 } 2023 #ifdef MULTIPROCESSOR 2024 if (l && l->l_cpu != NULL) 2025 ki->p_cpuid = l->l_cpu->ci_cpuid; 2026 else 2027 #endif 2028 ki->p_cpuid = KI_NOCPU; 2029 2030 } 2031 2032 /* 2033 * Fill in a kinfo_lwp structure for the specified lwp. 2034 */ 2035 static void 2036 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 2037 { 2038 2039 kl->l_forw = PTRTOINT64(l->l_forw); 2040 kl->l_back = PTRTOINT64(l->l_back); 2041 kl->l_laddr = PTRTOINT64(l); 2042 kl->l_addr = PTRTOINT64(l->l_addr); 2043 kl->l_stat = l->l_stat; 2044 kl->l_lid = l->l_lid; 2045 kl->l_flag = l->l_flag; 2046 2047 kl->l_swtime = l->l_swtime; 2048 kl->l_slptime = l->l_slptime; 2049 if (l->l_stat == LSONPROC) { 2050 KDASSERT(l->l_cpu != NULL); 2051 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 2052 } else 2053 kl->l_schedflags = 0; 2054 kl->l_holdcnt = l->l_holdcnt; 2055 kl->l_priority = l->l_priority; 2056 kl->l_usrpri = l->l_usrpri; 2057 if (l->l_wmesg) 2058 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 2059 kl->l_wchan = PTRTOINT64(l->l_wchan); 2060 #ifdef MULTIPROCESSOR 2061 if (l->l_cpu != NULL) 2062 kl->l_cpuid = l->l_cpu->ci_cpuid; 2063 else 2064 #endif 2065 kl->l_cpuid = KI_NOCPU; 2066 } 2067 2068 int 2069 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 2070 struct proc *up) 2071 { 2072 struct ps_strings pss; 2073 struct proc *p; 2074 size_t len, upper_bound, xlen, i; 2075 struct uio auio; 2076 struct iovec aiov; 2077 vaddr_t argv; 2078 pid_t pid; 2079 int nargv, type, error; 2080 char *arg; 2081 char *tmp; 2082 2083 if (namelen != 2) 2084 return (EINVAL); 2085 pid = name[0]; 2086 type = name[1]; 2087 2088 switch (type) { 2089 case KERN_PROC_ARGV: 2090 case KERN_PROC_NARGV: 2091 case KERN_PROC_ENV: 2092 case KERN_PROC_NENV: 2093 /* ok */ 2094 break; 2095 default: 2096 return (EINVAL); 2097 } 2098 2099 /* check pid */ 2100 if ((p = pfind(pid)) == NULL) 2101 return (EINVAL); 2102 2103 /* only root or same user change look at the environment */ 2104 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 2105 if (up->p_ucred->cr_uid != 0) { 2106 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 2107 up->p_cred->p_ruid != p->p_cred->p_svuid) 2108 return (EPERM); 2109 } 2110 } 2111 2112 if (sizep != NULL && where == NULL) { 2113 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 2114 *sizep = sizeof (int); 2115 else 2116 *sizep = ARG_MAX; /* XXX XXX XXX */ 2117 return (0); 2118 } 2119 if (where == NULL || sizep == NULL) 2120 return (EINVAL); 2121 2122 /* 2123 * Zombies don't have a stack, so we can't read their psstrings. 2124 * System processes also don't have a user stack. 2125 */ 2126 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 2127 return (EINVAL); 2128 2129 /* 2130 * Lock the process down in memory. 2131 */ 2132 /* XXXCDC: how should locking work here? */ 2133 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 2134 return (EFAULT); 2135 2136 p->p_vmspace->vm_refcnt++; /* XXX */ 2137 2138 /* 2139 * Allocate a temporary buffer to hold the arguments. 2140 */ 2141 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2142 2143 /* 2144 * Read in the ps_strings structure. 2145 */ 2146 aiov.iov_base = &pss; 2147 aiov.iov_len = sizeof(pss); 2148 auio.uio_iov = &aiov; 2149 auio.uio_iovcnt = 1; 2150 auio.uio_offset = (vaddr_t)p->p_psstr; 2151 auio.uio_resid = sizeof(pss); 2152 auio.uio_segflg = UIO_SYSSPACE; 2153 auio.uio_rw = UIO_READ; 2154 auio.uio_procp = NULL; 2155 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2156 if (error) 2157 goto done; 2158 2159 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2160 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2161 else 2162 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2163 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2164 error = copyout(&nargv, where, sizeof(nargv)); 2165 *sizep = sizeof(nargv); 2166 goto done; 2167 } 2168 /* 2169 * Now read the address of the argument vector. 2170 */ 2171 switch (type) { 2172 case KERN_PROC_ARGV: 2173 /* XXX compat32 stuff here */ 2174 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2175 break; 2176 case KERN_PROC_ENV: 2177 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2178 break; 2179 default: 2180 return (EINVAL); 2181 } 2182 auio.uio_offset = (off_t)(long)tmp; 2183 aiov.iov_base = &argv; 2184 aiov.iov_len = sizeof(argv); 2185 auio.uio_iov = &aiov; 2186 auio.uio_iovcnt = 1; 2187 auio.uio_resid = sizeof(argv); 2188 auio.uio_segflg = UIO_SYSSPACE; 2189 auio.uio_rw = UIO_READ; 2190 auio.uio_procp = NULL; 2191 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2192 if (error) 2193 goto done; 2194 2195 /* 2196 * Now copy in the actual argument vector, one page at a time, 2197 * since we don't know how long the vector is (though, we do 2198 * know how many NUL-terminated strings are in the vector). 2199 */ 2200 len = 0; 2201 upper_bound = *sizep; 2202 for (; nargv != 0 && len < upper_bound; len += xlen) { 2203 aiov.iov_base = arg; 2204 aiov.iov_len = PAGE_SIZE; 2205 auio.uio_iov = &aiov; 2206 auio.uio_iovcnt = 1; 2207 auio.uio_offset = argv + len; 2208 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2209 auio.uio_resid = xlen; 2210 auio.uio_segflg = UIO_SYSSPACE; 2211 auio.uio_rw = UIO_READ; 2212 auio.uio_procp = NULL; 2213 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2214 if (error) 2215 goto done; 2216 2217 for (i = 0; i < xlen && nargv != 0; i++) { 2218 if (arg[i] == '\0') 2219 nargv--; /* one full string */ 2220 } 2221 2222 /* 2223 * Make sure we don't copyout past the end of the user's 2224 * buffer. 2225 */ 2226 if (len + i > upper_bound) 2227 i = upper_bound - len; 2228 2229 error = copyout(arg, (char *)where + len, i); 2230 if (error) 2231 break; 2232 2233 if (nargv == 0) { 2234 len += i; 2235 break; 2236 } 2237 } 2238 *sizep = len; 2239 2240 done: 2241 uvmspace_free(p->p_vmspace); 2242 2243 free(arg, M_TEMP); 2244 return (error); 2245 } 2246 2247 #if NPTY > 0 2248 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2249 2250 /* 2251 * Validate parameters and get old / set new parameters 2252 * for pty sysctl function. 2253 */ 2254 static int 2255 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2256 { 2257 int error = 0; 2258 int oldmax = 0, newmax = 0; 2259 2260 /* get current value of maxptys */ 2261 oldmax = pty_maxptys(0, 0); 2262 2263 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2264 2265 if (!error && newp) { 2266 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2267 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2268 2269 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2270 return (EINVAL); 2271 2272 } 2273 2274 return (error); 2275 } 2276 #endif /* NPTY > 0 */ 2277 2278 static int 2279 sysctl_dotkstat(int *name, u_int namelen, void *where, size_t *sizep, 2280 void *newp) 2281 { 2282 2283 /* all sysctl names at this level are terminal */ 2284 if (namelen != 1) 2285 return (ENOTDIR); /* overloaded */ 2286 2287 switch (name[0]) { 2288 case KERN_TKSTAT_NIN: 2289 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2290 case KERN_TKSTAT_NOUT: 2291 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2292 case KERN_TKSTAT_CANCC: 2293 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2294 case KERN_TKSTAT_RAWCC: 2295 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2296 default: 2297 return (EOPNOTSUPP); 2298 } 2299 } 2300
Indexes created Tue Sep 30 06:09:59 GMT 2025