kern_sysctl.c revision 1.148
1 /* $NetBSD: kern_sysctl.c,v 1.148 2003/10/02 09:30:16 kleink 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 1.148 2003/10/02 09:30:16 kleink 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 int i; 299 struct cpu_info *ci; 300 CPU_INFO_ITERATOR cii; 301 302 for (i = 0; i < CPUSTATES; i++) 303 cp_time[i] = 0; 304 305 for (CPU_INFO_FOREACH(cii, ci)) { 306 for (i = 0; i < CPUSTATES; i++) 307 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 308 } 309 return (sysctl_rdstruct(oldp, oldlenp, newp, 310 cp_time, sizeof(cp_time))); 311 } 312 313 static int 314 sysctl_ncpus(void) 315 { 316 struct cpu_info *ci; 317 CPU_INFO_ITERATOR cii; 318 319 int ncpus = 0; 320 for (CPU_INFO_FOREACH(cii, ci)) 321 ncpus++; 322 return (ncpus); 323 } 324 325 #endif 326 327 /* 328 * kernel related system variables. 329 */ 330 int 331 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 332 void *newp, size_t newlen, struct proc *p) 333 { 334 int error, level, inthostid; 335 int old_autonicetime; 336 int old_vnodes; 337 dev_t consdev; 338 #if NRND > 0 339 int v; 340 #endif 341 342 /* All sysctl names at this level, except for a few, are terminal. */ 343 switch (name[0]) { 344 case KERN_PROC: 345 case KERN_PROC2: 346 case KERN_LWP: 347 case KERN_PROF: 348 case KERN_MBUF: 349 case KERN_PROC_ARGS: 350 case KERN_SYSVIPC_INFO: 351 case KERN_PIPE: 352 case KERN_TKSTAT: 353 /* Not terminal. */ 354 break; 355 default: 356 if (namelen != 1) 357 return (ENOTDIR); /* overloaded */ 358 } 359 360 switch (name[0]) { 361 case KERN_OSTYPE: 362 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 363 case KERN_OSRELEASE: 364 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 365 case KERN_OSREV: 366 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 367 case KERN_VERSION: 368 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 369 case KERN_MAXVNODES: 370 old_vnodes = desiredvnodes; 371 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 372 if (newp && !error) { 373 if (old_vnodes > desiredvnodes) { 374 error = vfs_drainvnodes(desiredvnodes, p); 375 if (error) { 376 desiredvnodes = old_vnodes; 377 return error; 378 } 379 } 380 vfs_reinit(); 381 nchreinit(); 382 } 383 return (error); 384 case KERN_MAXPROC: 385 { 386 int nmaxproc = maxproc; 387 388 error = sysctl_int(oldp, oldlenp, newp, newlen, &nmaxproc); 389 390 if (!error && newp) { 391 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 392 return (EINVAL); 393 394 #ifdef __HAVE_CPU_MAXPROC 395 if (nmaxproc > cpu_maxproc()) 396 return (EINVAL); 397 #endif 398 maxproc = nmaxproc; 399 } 400 401 return (error); 402 } 403 case KERN_MAXFILES: 404 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 405 case KERN_ARGMAX: 406 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 407 case KERN_SECURELVL: 408 level = securelevel; 409 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 410 newp == NULL) 411 return (error); 412 if (level < securelevel && p->p_pid != 1) 413 return (EPERM); 414 securelevel = level; 415 return (0); 416 case KERN_HOSTNAME: 417 error = sysctl_string(oldp, oldlenp, newp, newlen, 418 hostname, sizeof(hostname)); 419 if (newp && !error) 420 hostnamelen = newlen; 421 return (error); 422 case KERN_DOMAINNAME: 423 error = sysctl_string(oldp, oldlenp, newp, newlen, 424 domainname, sizeof(domainname)); 425 if (newp && !error) 426 domainnamelen = newlen; 427 return (error); 428 case KERN_HOSTID: 429 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 430 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 431 if (newp && !error) 432 hostid = inthostid; 433 return (error); 434 case KERN_CLOCKRATE: 435 return (sysctl_clockrate(oldp, oldlenp)); 436 case KERN_BOOTTIME: 437 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 438 sizeof(struct timeval))); 439 case KERN_VNODE: 440 return (sysctl_vnode(oldp, oldlenp, p)); 441 case KERN_PROC: 442 case KERN_PROC2: 443 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 444 case KERN_LWP: 445 return (sysctl_dolwp(name, namelen, oldp, oldlenp)); 446 case KERN_PROC_ARGS: 447 return (sysctl_procargs(name + 1, namelen - 1, 448 oldp, oldlenp, p)); 449 case KERN_FILE: 450 return (sysctl_file(oldp, oldlenp)); 451 #ifdef GPROF 452 case KERN_PROF: 453 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 454 newp, newlen)); 455 #endif 456 case KERN_POSIX1: 457 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 458 case KERN_NGROUPS: 459 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 460 case KERN_JOB_CONTROL: 461 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 462 case KERN_SAVED_IDS: 463 #ifdef _POSIX_SAVED_IDS 464 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 465 #else 466 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 467 #endif 468 case KERN_MAXPARTITIONS: 469 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 470 case KERN_RAWPARTITION: 471 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 472 #ifdef NTP 473 case KERN_NTPTIME: 474 return (sysctl_ntptime(oldp, oldlenp)); 475 #endif 476 case KERN_AUTONICETIME: 477 old_autonicetime = autonicetime; 478 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 479 if (autonicetime < 0) 480 autonicetime = old_autonicetime; 481 return (error); 482 case KERN_AUTONICEVAL: 483 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 484 if (autoniceval < PRIO_MIN) 485 autoniceval = PRIO_MIN; 486 if (autoniceval > PRIO_MAX) 487 autoniceval = PRIO_MAX; 488 return (error); 489 case KERN_RTC_OFFSET: 490 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 491 case KERN_ROOT_DEVICE: 492 return (sysctl_rdstring(oldp, oldlenp, newp, 493 root_device->dv_xname)); 494 case KERN_ROOT_PARTITION: 495 return (sysctl_rdint(oldp, oldlenp, newp, DISKPART(rootdev))); 496 case KERN_MSGBUFSIZE: 497 /* 498 * deal with cases where the message buffer has 499 * become corrupted. 500 */ 501 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 502 msgbufenabled = 0; 503 return (ENXIO); 504 } 505 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 506 case KERN_FSYNC: 507 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 508 case KERN_SYSVMSG: 509 #ifdef SYSVMSG 510 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 511 #else 512 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 513 #endif 514 case KERN_SYSVSEM: 515 #ifdef SYSVSEM 516 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 517 #else 518 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 519 #endif 520 case KERN_SYSVSHM: 521 #ifdef SYSVSHM 522 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 523 #else 524 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 525 #endif 526 case KERN_DEFCORENAME: 527 if (newp && newlen < 1) 528 return (EINVAL); 529 error = sysctl_string(oldp, oldlenp, newp, newlen, 530 defcorename, sizeof(defcorename)); 531 return (error); 532 case KERN_SYNCHRONIZED_IO: 533 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 534 case KERN_IOV_MAX: 535 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 536 case KERN_MBUF: 537 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 538 newp, newlen)); 539 case KERN_MAPPED_FILES: 540 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 541 case KERN_MEMLOCK: 542 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 543 case KERN_MEMLOCK_RANGE: 544 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 545 case KERN_MEMORY_PROTECTION: 546 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 547 case KERN_LOGIN_NAME_MAX: 548 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 549 case KERN_LOGSIGEXIT: 550 return (sysctl_int(oldp, oldlenp, newp, newlen, 551 &kern_logsigexit)); 552 case KERN_FSCALE: 553 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 554 case KERN_CCPU: 555 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 556 case KERN_CP_TIME: 557 #ifndef MULTIPROCESSOR 558 return (sysctl_rdstruct(oldp, oldlenp, newp, 559 curcpu()->ci_schedstate.spc_cp_time, 560 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 561 #else 562 return (sysctl_docptime(oldp, oldlenp, newp)); 563 #endif 564 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 565 case KERN_SYSVIPC_INFO: 566 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 567 #endif 568 case KERN_MSGBUF: 569 return (sysctl_msgbuf(oldp, oldlenp)); 570 case KERN_CONSDEV: 571 if (cn_tab != NULL) 572 consdev = cn_tab->cn_dev; 573 else 574 consdev = NODEV; 575 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 576 sizeof consdev)); 577 #if NPTY > 0 578 case KERN_MAXPTYS: 579 return (sysctl_pty(oldp, oldlenp, newp, newlen)); 580 #endif 581 #ifndef PIPE_SOCKETPAIR 582 case KERN_PIPE: 583 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 584 newp, newlen)); 585 #endif 586 case KERN_MAXPHYS: 587 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 588 case KERN_SOMAXKVA: 589 { 590 int new_somaxkva = somaxkva; 591 592 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_somaxkva); 593 if (newp && !error) { 594 if (new_somaxkva < (16 * 1024 * 1024)) /* sanity */ 595 return (EINVAL); 596 somaxkva = new_somaxkva; 597 } 598 return (error); 599 } 600 case KERN_SBMAX: 601 { 602 int new_sbmax = sb_max; 603 604 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 605 if (newp && !error) { 606 if (new_sbmax < (16 * 1024)) /* sanity */ 607 return (EINVAL); 608 sb_max = new_sbmax; 609 } 610 return (error); 611 } 612 case KERN_TKSTAT: 613 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 614 newp)); 615 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 616 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 617 case KERN_URND: 618 #if NRND > 0 619 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 620 sizeof(v)) 621 return (sysctl_rdint(oldp, oldlenp, newp, v)); 622 else 623 return (EIO); /*XXX*/ 624 #else 625 return (EOPNOTSUPP); 626 #endif 627 case KERN_LABELSECTOR: 628 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 629 case KERN_LABELOFFSET: 630 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 631 case KERN_FORKFSLEEP: 632 { 633 /* userland sees value in ms, internally is in ticks */ 634 int timo, lsleep = forkfsleep * 1000 / hz; 635 636 error = sysctl_int(oldp, oldlenp, newp, newlen, &lsleep); 637 if (newp && !error) { 638 /* refuse negative values, and overly 'long time' */ 639 if (lsleep < 0 || lsleep > MAXSLP * 1000) 640 return (EINVAL); 641 642 timo = mstohz(lsleep); 643 644 /* if the interval is >0 ms && <1 tick, use 1 tick */ 645 if (lsleep != 0 && timo == 0) 646 forkfsleep = 1; 647 else 648 forkfsleep = timo; 649 } 650 return (error); 651 } 652 case KERN_POSIX_THREADS: /* XXX _POSIX_VERSION */ 653 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 654 case KERN_POSIX_SEMAPHORES: /* XXX _POSIX_VERSION */ 655 #ifdef P1003_1B_SEMAPHORE 656 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 657 #else 658 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 659 #endif 660 case KERN_POSIX_BARRIERS: /* XXX _POSIX_VERSION */ 661 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 662 case KERN_POSIX_TIMERS: /* XXX _POSIX_VERSION */ 663 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 664 case KERN_POSIX_SPIN_LOCKS: /* XXX _POSIX_VERSION */ 665 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 666 case KERN_POSIX_READER_WRITER_LOCKS: /* XXX _POSIX_VERSION */ 667 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 668 case KERN_DUMP_ON_PANIC: 669 return (sysctl_int(oldp, oldlenp, newp, newlen, &dumponpanic)); 670 671 case KERN_DRIVERS: 672 return (sysctl_drivers(oldp, oldlenp)); 673 674 default: 675 return (EOPNOTSUPP); 676 } 677 /* NOTREACHED */ 678 } 679 680 /* 681 * hardware related system variables. 682 */ 683 int 684 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 685 void *newp, size_t newlen, struct proc *p) 686 { 687 688 /* All sysctl names at this level, except for a few, are terminal. */ 689 switch (name[0]) { 690 case HW_DISKSTATS: 691 /* Not terminal. */ 692 break; 693 default: 694 if (namelen != 1) 695 return (ENOTDIR); /* overloaded */ 696 } 697 698 switch (name[0]) { 699 case HW_MACHINE: 700 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 701 case HW_MACHINE_ARCH: 702 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 703 case HW_MODEL: 704 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 705 case HW_NCPU: 706 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 707 case HW_BYTEORDER: 708 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 709 case HW_PHYSMEM: 710 { 711 u_int rval; 712 713 if ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) 714 rval = UINT_MAX; 715 else 716 rval = physmem * PAGE_SIZE; 717 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 718 } 719 case HW_PHYSMEM64: 720 return (sysctl_rdquad(oldp, oldlenp, newp, 721 (u_quad_t)physmem * PAGE_SIZE)); 722 case HW_USERMEM: 723 { 724 u_int rval; 725 726 if ((u_int)(physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 727 rval = UINT_MAX; 728 else 729 rval = (physmem - uvmexp.wired) * PAGE_SIZE; 730 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 731 } 732 case HW_USERMEM64: 733 return (sysctl_rdquad(oldp, oldlenp, newp, 734 (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE)); 735 case HW_PAGESIZE: 736 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 737 case HW_ALIGNBYTES: 738 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 739 case HW_DISKNAMES: 740 return (sysctl_disknames(oldp, oldlenp)); 741 case HW_DISKSTATS: 742 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 743 case HW_CNMAGIC: { 744 char magic[CNS_LEN]; 745 int error; 746 747 if (oldp) 748 cn_get_magic(magic, CNS_LEN); 749 error = sysctl_string(oldp, oldlenp, newp, newlen, 750 magic, sizeof(magic)); 751 if (newp && !error) { 752 error = cn_set_magic(magic); 753 } 754 return (error); 755 } 756 default: 757 return (EOPNOTSUPP); 758 } 759 /* NOTREACHED */ 760 } 761 762 #ifdef DEBUG 763 /* 764 * Debugging related system variables. 765 */ 766 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 767 struct ctldebug debug5, debug6, debug7, debug8, debug9; 768 struct ctldebug debug10, debug11, debug12, debug13, debug14; 769 struct ctldebug debug15, debug16, debug17, debug18, debug19; 770 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 771 &debug0, &debug1, &debug2, &debug3, &debug4, 772 &debug5, &debug6, &debug7, &debug8, &debug9, 773 &debug10, &debug11, &debug12, &debug13, &debug14, 774 &debug15, &debug16, &debug17, &debug18, &debug19, 775 }; 776 777 int 778 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 779 void *newp, size_t newlen, struct proc *p) 780 { 781 struct ctldebug *cdp; 782 783 /* all sysctl names at this level are name and field */ 784 if (namelen != 2) 785 return (ENOTDIR); /* overloaded */ 786 if (name[0] < 0 || name[0] >= CTL_DEBUG_MAXID) 787 return (EOPNOTSUPP); 788 cdp = debugvars[name[0]]; 789 if (cdp->debugname == 0) 790 return (EOPNOTSUPP); 791 switch (name[1]) { 792 case CTL_DEBUG_NAME: 793 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 794 case CTL_DEBUG_VALUE: 795 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 796 default: 797 return (EOPNOTSUPP); 798 } 799 /* NOTREACHED */ 800 } 801 #endif /* DEBUG */ 802 803 int 804 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 805 void *newp, size_t newlen, struct proc *p) 806 { 807 struct proc *ptmp = NULL; 808 int error = 0; 809 struct rlimit alim; 810 struct plimit *newplim; 811 char *tmps = NULL; 812 size_t len, curlen; 813 u_int i; 814 int si; 815 816 if (namelen < 2) 817 return (EINVAL); 818 819 if (name[0] == PROC_CURPROC) { 820 ptmp = p; 821 } else if ((ptmp = pfind((pid_t)name[0])) == NULL) { 822 return (ESRCH); 823 } else { 824 if (p->p_ucred->cr_uid != 0) { 825 if (p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 826 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 827 return (EPERM); 828 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 829 return (EPERM); /* sgid proc */ 830 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 831 if (p->p_ucred->cr_groups[i] == 832 ptmp->p_cred->p_rgid) 833 break; 834 } 835 if (i == p->p_ucred->cr_ngroups) 836 return (EPERM); 837 } 838 } 839 switch (name[1]) { 840 case PROC_PID_STOPFORK: 841 if (namelen != 2) 842 return (EINVAL); 843 si = ((ptmp->p_flag & P_STOPFORK) != 0); 844 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &si)) != 0) 845 return (error); 846 if (si != 0) 847 ptmp->p_flag |= P_STOPFORK; 848 else 849 ptmp->p_flag &= ~P_STOPFORK; 850 return (0); 851 break; 852 853 case PROC_PID_STOPEXEC: 854 if (namelen != 2) 855 return (EINVAL); 856 si = ((ptmp->p_flag & P_STOPEXEC) != 0); 857 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &si)) != 0) 858 return (error); 859 if (si != 0) 860 ptmp->p_flag |= P_STOPEXEC; 861 else 862 ptmp->p_flag &= ~P_STOPEXEC; 863 return (0); 864 break; 865 866 case PROC_PID_CORENAME: 867 if (namelen != 2) 868 return (EINVAL); 869 /* 870 * Can't use sysctl_string() here because we may malloc a new 871 * area during the process, so we have to do it by hand. 872 */ 873 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 874 if (oldlenp && *oldlenp < curlen) { 875 if (!oldp) 876 *oldlenp = curlen; 877 return (ENOMEM); 878 } 879 if (newp) { 880 if (securelevel > 2) 881 return (EPERM); 882 if (newlen > MAXPATHLEN) 883 return (ENAMETOOLONG); 884 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 885 if (tmps == NULL) 886 return (ENOMEM); 887 error = copyin(newp, tmps, newlen + 1); 888 tmps[newlen] = '\0'; 889 if (error) 890 goto cleanup; 891 /* Enforce to be either 'core' for end with '.core' */ 892 if (newlen < 4) { /* c.o.r.e */ 893 error = EINVAL; 894 goto cleanup; 895 } 896 len = newlen - 4; 897 if (len > 0) { 898 if (tmps[len - 1] != '.' && 899 tmps[len - 1] != '/') { 900 error = EINVAL; 901 goto cleanup; 902 } 903 } 904 if (strcmp(&tmps[len], "core") != 0) { 905 error = EINVAL; 906 goto cleanup; 907 } 908 } 909 if (oldp && oldlenp) { 910 *oldlenp = curlen; 911 error = copyout(ptmp->p_limit->pl_corename, oldp, 912 curlen); 913 } 914 if (newp && error == 0) { 915 /* if the 2 strings are identical, don't limcopy() */ 916 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 917 error = 0; 918 goto cleanup; 919 } 920 if (ptmp->p_limit->p_refcnt > 1 && 921 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 922 newplim = limcopy(ptmp->p_limit); 923 limfree(ptmp->p_limit); 924 ptmp->p_limit = newplim; 925 } 926 if (ptmp->p_limit->pl_corename != defcorename) { 927 free(ptmp->p_limit->pl_corename, M_TEMP); 928 } 929 ptmp->p_limit->pl_corename = tmps; 930 return (0); 931 } 932 cleanup: 933 if (tmps) 934 free(tmps, M_TEMP); 935 return (error); 936 break; 937 938 case PROC_PID_LIMIT: 939 if (namelen != 4 || name[2] < 1 || 940 name[2] >= PROC_PID_LIMIT_MAXID) 941 return (EINVAL); 942 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 943 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 944 error = sysctl_quad(oldp, oldlenp, newp, newlen, 945 &alim.rlim_max); 946 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 947 error = sysctl_quad(oldp, oldlenp, newp, newlen, 948 &alim.rlim_cur); 949 else 950 error = (EINVAL); 951 952 if (error) 953 return (error); 954 955 if (newp) 956 error = dosetrlimit(ptmp, p->p_cred, 957 name[2] - 1, &alim); 958 return (error); 959 break; 960 961 default: 962 return (EINVAL); 963 break; 964 } 965 /* NOTREACHED */ 966 return (EINVAL); 967 } 968 969 int 970 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 971 void *newp, size_t newlen, struct proc *p) 972 { 973 static struct { 974 const char *name; 975 int type; 976 } emulations[] = CTL_EMUL_NAMES; 977 const struct emul *e; 978 const char *ename; 979 #ifdef LKM 980 extern struct lock exec_lock; /* XXX */ 981 int error; 982 #else 983 extern int nexecs_builtin; 984 extern const struct execsw execsw_builtin[]; 985 int i; 986 #endif 987 988 /* all sysctl names at this level are name and field */ 989 if (namelen < 2) 990 return (ENOTDIR); /* overloaded */ 991 992 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 993 return (EOPNOTSUPP); 994 995 ename = emulations[name[0]].name; 996 997 #ifdef LKM 998 lockmgr(&exec_lock, LK_SHARED, NULL); 999 if ((e = emul_search(ename))) { 1000 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1001 newp, newlen, p); 1002 } else 1003 error = EOPNOTSUPP; 1004 lockmgr(&exec_lock, LK_RELEASE, NULL); 1005 1006 return (error); 1007 #else 1008 for (i = 0; i < nexecs_builtin; i++) { 1009 e = execsw_builtin[i].es_emul; 1010 /* 1011 * In order to match e.g. e->e_name "irix o32" 1012 * with ename "irix", we limit the comparison 1013 * to the length of ename. 1014 */ 1015 if (e == NULL || 1016 strncmp(ename, e->e_name, strlen(ename)) != 0 || 1017 e->e_sysctl == NULL) 1018 continue; 1019 1020 return ((*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1021 newp, newlen, p)); 1022 } 1023 1024 return (EOPNOTSUPP); 1025 #endif 1026 } 1027 /* 1028 * Convenience macros. 1029 */ 1030 1031 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 1032 if (oldlenp) { \ 1033 if (!oldp) \ 1034 *oldlenp = len; \ 1035 else { \ 1036 if (*oldlenp < len) \ 1037 return (ENOMEM); \ 1038 *oldlenp = len; \ 1039 error = copyout(valp, oldp, len); \ 1040 } \ 1041 } 1042 1043 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 1044 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 1045 1046 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 1047 if (newp && newlen != len) \ 1048 return (EINVAL); 1049 1050 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1051 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1052 1053 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1054 if (error == 0 && newp) \ 1055 error = copyin(newp, valp, len); 1056 1057 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1058 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1059 1060 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1061 if (oldlenp) { \ 1062 len = strlen(str) + 1; \ 1063 if (!oldp) \ 1064 *oldlenp = len; \ 1065 else { \ 1066 if (*oldlenp < len) { \ 1067 err2 = ENOMEM; \ 1068 len = *oldlenp; \ 1069 } else \ 1070 *oldlenp = len; \ 1071 error = copyout(str, oldp, len);\ 1072 if (error == 0) \ 1073 error = err2; \ 1074 } \ 1075 } 1076 1077 /* 1078 * Validate parameters and get old / set new parameters 1079 * for an integer-valued sysctl function. 1080 */ 1081 int 1082 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1083 { 1084 int error = 0; 1085 1086 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1087 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1088 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1089 1090 return (error); 1091 } 1092 1093 1094 /* 1095 * As above, but read-only. 1096 */ 1097 int 1098 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1099 { 1100 int error = 0; 1101 1102 if (newp) 1103 return (EPERM); 1104 1105 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1106 1107 return (error); 1108 } 1109 1110 /* 1111 * Validate parameters and get old / set new parameters 1112 * for an quad-valued sysctl function. 1113 */ 1114 int 1115 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1116 quad_t *valp) 1117 { 1118 int error = 0; 1119 1120 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1121 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1122 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1123 1124 return (error); 1125 } 1126 1127 /* 1128 * As above, but read-only. 1129 */ 1130 int 1131 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1132 { 1133 int error = 0; 1134 1135 if (newp) 1136 return (EPERM); 1137 1138 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1139 1140 return (error); 1141 } 1142 1143 /* 1144 * Validate parameters and get old / set new parameters 1145 * for a string-valued sysctl function. 1146 */ 1147 int 1148 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1149 size_t maxlen) 1150 { 1151 int error = 0, err2 = 0; 1152 size_t len; 1153 1154 if (newp && newlen >= maxlen) 1155 return (EINVAL); 1156 1157 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1158 1159 if (error == 0 && newp) { 1160 error = copyin(newp, str, newlen); 1161 str[newlen] = 0; 1162 } 1163 return (error); 1164 } 1165 1166 /* 1167 * As above, but read-only. 1168 */ 1169 int 1170 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1171 { 1172 int error = 0, err2 = 0; 1173 size_t len; 1174 1175 if (newp) 1176 return (EPERM); 1177 1178 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1179 1180 return (error); 1181 } 1182 1183 /* 1184 * Validate parameters and get old / set new parameters 1185 * for a structure oriented sysctl function. 1186 */ 1187 int 1188 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1189 size_t len) 1190 { 1191 int error = 0; 1192 1193 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1194 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1195 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1196 1197 return (error); 1198 } 1199 1200 /* 1201 * Validate parameters and get old parameters 1202 * for a structure oriented sysctl function. 1203 */ 1204 int 1205 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1206 size_t len) 1207 { 1208 int error = 0; 1209 1210 if (newp) 1211 return (EPERM); 1212 1213 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1214 1215 return (error); 1216 } 1217 1218 /* 1219 * As above, but can return a truncated result. 1220 */ 1221 int 1222 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1223 size_t len) 1224 { 1225 int error = 0; 1226 1227 if (newp) 1228 return (EPERM); 1229 1230 len = min(*oldlenp, len); 1231 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1232 1233 return (error); 1234 } 1235 1236 /* 1237 * Get file structures. 1238 */ 1239 static int 1240 sysctl_file(void *vwhere, size_t *sizep) 1241 { 1242 int error; 1243 size_t buflen; 1244 struct file *fp; 1245 char *start, *where; 1246 1247 start = where = vwhere; 1248 buflen = *sizep; 1249 if (where == NULL) { 1250 /* 1251 * overestimate by 10 files 1252 */ 1253 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1254 return (0); 1255 } 1256 1257 /* 1258 * first copyout filehead 1259 */ 1260 if (buflen < sizeof(filehead)) { 1261 *sizep = 0; 1262 return (0); 1263 } 1264 error = copyout(&filehead, where, sizeof(filehead)); 1265 if (error) 1266 return (error); 1267 buflen -= sizeof(filehead); 1268 where += sizeof(filehead); 1269 1270 /* 1271 * followed by an array of file structures 1272 */ 1273 LIST_FOREACH(fp, &filehead, f_list) { 1274 if (buflen < sizeof(struct file)) { 1275 *sizep = where - start; 1276 return (ENOMEM); 1277 } 1278 error = copyout(fp, where, sizeof(struct file)); 1279 if (error) 1280 return (error); 1281 buflen -= sizeof(struct file); 1282 where += sizeof(struct file); 1283 } 1284 *sizep = where - start; 1285 return (0); 1286 } 1287 1288 /* 1289 * Get driver names and majors 1290 */ 1291 static int 1292 sysctl_drivers(void *vwhere, size_t *sizep) 1293 { 1294 int error; 1295 size_t buflen; 1296 struct kinfo_drivers kd; 1297 char *start, *where; 1298 const char *name; 1299 int i; 1300 extern struct devsw_conv *devsw_conv; 1301 extern int max_devsw_convs; 1302 1303 start = where = vwhere; 1304 buflen = *sizep; 1305 if (where == NULL) { 1306 *sizep = max_devsw_convs * sizeof kd; 1307 return 0; 1308 } 1309 1310 /* 1311 * An array of kinfo_drivers structures 1312 */ 1313 error = 0; 1314 for (i = 0; i < max_devsw_convs; i++) { 1315 name = devsw_conv[i].d_name; 1316 if (name == NULL) 1317 continue; 1318 if (buflen < sizeof kd) { 1319 error = ENOMEM; 1320 break; 1321 } 1322 kd.d_bmajor = devsw_conv[i].d_bmajor; 1323 kd.d_cmajor = devsw_conv[i].d_cmajor; 1324 strlcpy(kd.d_name, name, sizeof kd.d_name); 1325 error = copyout(&kd, where, sizeof kd); 1326 if (error != 0) 1327 break; 1328 buflen -= sizeof kd; 1329 where += sizeof kd; 1330 } 1331 *sizep = where - start; 1332 return error; 1333 } 1334 1335 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1336 #define FILL_PERM(src, dst) do { \ 1337 (dst)._key = (src)._key; \ 1338 (dst).uid = (src).uid; \ 1339 (dst).gid = (src).gid; \ 1340 (dst).cuid = (src).cuid; \ 1341 (dst).cgid = (src).cgid; \ 1342 (dst).mode = (src).mode; \ 1343 (dst)._seq = (src)._seq; \ 1344 } while (/*CONSTCOND*/ 0); 1345 #define FILL_MSG(src, dst) do { \ 1346 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1347 (dst).msg_qnum = (src).msg_qnum; \ 1348 (dst).msg_qbytes = (src).msg_qbytes; \ 1349 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1350 (dst).msg_lspid = (src).msg_lspid; \ 1351 (dst).msg_lrpid = (src).msg_lrpid; \ 1352 (dst).msg_stime = (src).msg_stime; \ 1353 (dst).msg_rtime = (src).msg_rtime; \ 1354 (dst).msg_ctime = (src).msg_ctime; \ 1355 } while (/*CONSTCOND*/ 0) 1356 #define FILL_SEM(src, dst) do { \ 1357 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1358 (dst).sem_nsems = (src).sem_nsems; \ 1359 (dst).sem_otime = (src).sem_otime; \ 1360 (dst).sem_ctime = (src).sem_ctime; \ 1361 } while (/*CONSTCOND*/ 0) 1362 #define FILL_SHM(src, dst) do { \ 1363 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1364 (dst).shm_segsz = (src).shm_segsz; \ 1365 (dst).shm_lpid = (src).shm_lpid; \ 1366 (dst).shm_cpid = (src).shm_cpid; \ 1367 (dst).shm_atime = (src).shm_atime; \ 1368 (dst).shm_dtime = (src).shm_dtime; \ 1369 (dst).shm_ctime = (src).shm_ctime; \ 1370 (dst).shm_nattch = (src).shm_nattch; \ 1371 } while (/*CONSTCOND*/ 0) 1372 1373 static int 1374 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1375 { 1376 #ifdef SYSVMSG 1377 struct msg_sysctl_info *msgsi = NULL; 1378 #endif 1379 #ifdef SYSVSEM 1380 struct sem_sysctl_info *semsi = NULL; 1381 #endif 1382 #ifdef SYSVSHM 1383 struct shm_sysctl_info *shmsi = NULL; 1384 #endif 1385 size_t infosize, dssize, tsize, buflen; 1386 void *buf = NULL; 1387 char *start; 1388 int32_t nds; 1389 int i, error, ret; 1390 1391 if (namelen != 1) 1392 return (EINVAL); 1393 1394 start = where; 1395 buflen = *sizep; 1396 1397 switch (*name) { 1398 case KERN_SYSVIPC_MSG_INFO: 1399 #ifdef SYSVMSG 1400 infosize = sizeof(msgsi->msginfo); 1401 nds = msginfo.msgmni; 1402 dssize = sizeof(msgsi->msgids[0]); 1403 break; 1404 #else 1405 return (EINVAL); 1406 #endif 1407 case KERN_SYSVIPC_SEM_INFO: 1408 #ifdef SYSVSEM 1409 infosize = sizeof(semsi->seminfo); 1410 nds = seminfo.semmni; 1411 dssize = sizeof(semsi->semids[0]); 1412 break; 1413 #else 1414 return (EINVAL); 1415 #endif 1416 case KERN_SYSVIPC_SHM_INFO: 1417 #ifdef SYSVSHM 1418 infosize = sizeof(shmsi->shminfo); 1419 nds = shminfo.shmmni; 1420 dssize = sizeof(shmsi->shmids[0]); 1421 break; 1422 #else 1423 return (EINVAL); 1424 #endif 1425 default: 1426 return (EINVAL); 1427 } 1428 /* 1429 * Round infosize to 64 bit boundary if requesting more than just 1430 * the info structure or getting the total data size. 1431 */ 1432 if (where == NULL || *sizep > infosize) 1433 infosize = ((infosize + 7) / 8) * 8; 1434 tsize = infosize + nds * dssize; 1435 1436 /* Return just the total size required. */ 1437 if (where == NULL) { 1438 *sizep = tsize; 1439 return (0); 1440 } 1441 1442 /* Not enough room for even the info struct. */ 1443 if (buflen < infosize) { 1444 *sizep = 0; 1445 return (ENOMEM); 1446 } 1447 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1448 memset(buf, 0, min(tsize, buflen)); 1449 1450 switch (*name) { 1451 #ifdef SYSVMSG 1452 case KERN_SYSVIPC_MSG_INFO: 1453 msgsi = (struct msg_sysctl_info *)buf; 1454 msgsi->msginfo = msginfo; 1455 break; 1456 #endif 1457 #ifdef SYSVSEM 1458 case KERN_SYSVIPC_SEM_INFO: 1459 semsi = (struct sem_sysctl_info *)buf; 1460 semsi->seminfo = seminfo; 1461 break; 1462 #endif 1463 #ifdef SYSVSHM 1464 case KERN_SYSVIPC_SHM_INFO: 1465 shmsi = (struct shm_sysctl_info *)buf; 1466 shmsi->shminfo = shminfo; 1467 break; 1468 #endif 1469 } 1470 buflen -= infosize; 1471 1472 ret = 0; 1473 if (buflen > 0) { 1474 /* Fill in the IPC data structures. */ 1475 for (i = 0; i < nds; i++) { 1476 if (buflen < dssize) { 1477 ret = ENOMEM; 1478 break; 1479 } 1480 switch (*name) { 1481 #ifdef SYSVMSG 1482 case KERN_SYSVIPC_MSG_INFO: 1483 FILL_MSG(msqids[i], msgsi->msgids[i]); 1484 break; 1485 #endif 1486 #ifdef SYSVSEM 1487 case KERN_SYSVIPC_SEM_INFO: 1488 FILL_SEM(sema[i], semsi->semids[i]); 1489 break; 1490 #endif 1491 #ifdef SYSVSHM 1492 case KERN_SYSVIPC_SHM_INFO: 1493 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1494 break; 1495 #endif 1496 } 1497 buflen -= dssize; 1498 } 1499 } 1500 *sizep -= buflen; 1501 error = copyout(buf, start, *sizep); 1502 /* If copyout succeeded, use return code set earlier. */ 1503 if (error == 0) 1504 error = ret; 1505 if (buf) 1506 free(buf, M_TEMP); 1507 return (error); 1508 } 1509 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1510 1511 static int 1512 sysctl_msgbuf(void *vwhere, size_t *sizep) 1513 { 1514 char *where = vwhere; 1515 size_t len, maxlen = *sizep; 1516 long beg, end; 1517 int error; 1518 1519 /* 1520 * deal with cases where the message buffer has 1521 * become corrupted. 1522 */ 1523 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1524 msgbufenabled = 0; 1525 return (ENXIO); 1526 } 1527 1528 if (where == NULL) { 1529 /* always return full buffer size */ 1530 *sizep = msgbufp->msg_bufs; 1531 return (0); 1532 } 1533 1534 error = 0; 1535 maxlen = min(msgbufp->msg_bufs, maxlen); 1536 1537 /* 1538 * First, copy from the write pointer to the end of 1539 * message buffer. 1540 */ 1541 beg = msgbufp->msg_bufx; 1542 end = msgbufp->msg_bufs; 1543 while (maxlen > 0) { 1544 len = min(end - beg, maxlen); 1545 if (len == 0) 1546 break; 1547 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1548 if (error) 1549 break; 1550 where += len; 1551 maxlen -= len; 1552 1553 /* 1554 * ... then, copy from the beginning of message buffer to 1555 * the write pointer. 1556 */ 1557 beg = 0; 1558 end = msgbufp->msg_bufx; 1559 } 1560 return (error); 1561 } 1562 1563 /* 1564 * try over estimating by 5 procs 1565 */ 1566 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1567 1568 static int 1569 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1570 { 1571 struct eproc eproc; 1572 struct kinfo_proc2 kproc2; 1573 struct kinfo_proc *dp; 1574 struct proc *p; 1575 const struct proclist_desc *pd; 1576 char *where, *dp2; 1577 int type, op, arg; 1578 u_int elem_size, elem_count; 1579 size_t buflen, needed; 1580 int error; 1581 1582 dp = vwhere; 1583 dp2 = where = vwhere; 1584 buflen = where != NULL ? *sizep : 0; 1585 error = 0; 1586 needed = 0; 1587 type = name[0]; 1588 1589 if (type == KERN_PROC) { 1590 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1591 return (EINVAL); 1592 op = name[1]; 1593 if (op != KERN_PROC_ALL) 1594 arg = name[2]; 1595 else 1596 arg = 0; /* Quell compiler warning */ 1597 elem_size = elem_count = 0; /* Ditto */ 1598 } else { 1599 if (namelen != 5) 1600 return (EINVAL); 1601 op = name[1]; 1602 arg = name[2]; 1603 elem_size = name[3]; 1604 elem_count = name[4]; 1605 } 1606 1607 proclist_lock_read(); 1608 1609 pd = proclists; 1610 again: 1611 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1612 /* 1613 * Skip embryonic processes. 1614 */ 1615 if (p->p_stat == SIDL) 1616 continue; 1617 /* 1618 * TODO - make more efficient (see notes below). 1619 * do by session. 1620 */ 1621 switch (op) { 1622 1623 case KERN_PROC_PID: 1624 /* could do this with just a lookup */ 1625 if (p->p_pid != (pid_t)arg) 1626 continue; 1627 break; 1628 1629 case KERN_PROC_PGRP: 1630 /* could do this by traversing pgrp */ 1631 if (p->p_pgrp->pg_id != (pid_t)arg) 1632 continue; 1633 break; 1634 1635 case KERN_PROC_SESSION: 1636 if (p->p_session->s_sid != (pid_t)arg) 1637 continue; 1638 break; 1639 1640 case KERN_PROC_TTY: 1641 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1642 if ((p->p_flag & P_CONTROLT) == 0 || 1643 p->p_session->s_ttyp == NULL || 1644 p->p_session->s_ttyvp != NULL) 1645 continue; 1646 } else if ((p->p_flag & P_CONTROLT) == 0 || 1647 p->p_session->s_ttyp == NULL) { 1648 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1649 continue; 1650 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1651 continue; 1652 break; 1653 1654 case KERN_PROC_UID: 1655 if (p->p_ucred->cr_uid != (uid_t)arg) 1656 continue; 1657 break; 1658 1659 case KERN_PROC_RUID: 1660 if (p->p_cred->p_ruid != (uid_t)arg) 1661 continue; 1662 break; 1663 1664 case KERN_PROC_GID: 1665 if (p->p_ucred->cr_gid != (uid_t)arg) 1666 continue; 1667 break; 1668 1669 case KERN_PROC_RGID: 1670 if (p->p_cred->p_rgid != (uid_t)arg) 1671 continue; 1672 break; 1673 1674 case KERN_PROC_ALL: 1675 /* allow everything */ 1676 break; 1677 1678 default: 1679 error = EINVAL; 1680 goto cleanup; 1681 } 1682 if (type == KERN_PROC) { 1683 if (buflen >= sizeof(struct kinfo_proc)) { 1684 fill_eproc(p, &eproc); 1685 error = copyout(p, &dp->kp_proc, 1686 sizeof(struct proc)); 1687 if (error) 1688 goto cleanup; 1689 error = copyout(&eproc, &dp->kp_eproc, 1690 sizeof(eproc)); 1691 if (error) 1692 goto cleanup; 1693 dp++; 1694 buflen -= sizeof(struct kinfo_proc); 1695 } 1696 needed += sizeof(struct kinfo_proc); 1697 } else { /* KERN_PROC2 */ 1698 if (buflen >= elem_size && elem_count > 0) { 1699 fill_kproc2(p, &kproc2); 1700 /* 1701 * Copy out elem_size, but not larger than 1702 * the size of a struct kinfo_proc2. 1703 */ 1704 error = copyout(&kproc2, dp2, 1705 min(sizeof(kproc2), elem_size)); 1706 if (error) 1707 goto cleanup; 1708 dp2 += elem_size; 1709 buflen -= elem_size; 1710 elem_count--; 1711 } 1712 needed += elem_size; 1713 } 1714 } 1715 pd++; 1716 if (pd->pd_list != NULL) 1717 goto again; 1718 proclist_unlock_read(); 1719 1720 if (where != NULL) { 1721 if (type == KERN_PROC) 1722 *sizep = (char *)dp - where; 1723 else 1724 *sizep = dp2 - where; 1725 if (needed > *sizep) 1726 return (ENOMEM); 1727 } else { 1728 needed += KERN_PROCSLOP; 1729 *sizep = needed; 1730 } 1731 return (0); 1732 cleanup: 1733 proclist_unlock_read(); 1734 return (error); 1735 } 1736 1737 1738 /* 1739 * try over estimating by 5 LWPs 1740 */ 1741 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1742 1743 static int 1744 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1745 { 1746 struct kinfo_lwp klwp; 1747 struct proc *p; 1748 struct lwp *l; 1749 char *where, *dp; 1750 int type, pid, elem_size, elem_count; 1751 int buflen, needed, error; 1752 1753 dp = where = vwhere; 1754 buflen = where != NULL ? *sizep : 0; 1755 error = needed = 0; 1756 type = name[0]; 1757 1758 if (namelen != 4) 1759 return (EINVAL); 1760 pid = name[1]; 1761 elem_size = name[2]; 1762 elem_count = name[3]; 1763 1764 p = pfind(pid); 1765 if (p == NULL) 1766 return (ESRCH); 1767 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1768 if (buflen >= elem_size && elem_count > 0) { 1769 fill_lwp(l, &klwp); 1770 /* 1771 * Copy out elem_size, but not larger than 1772 * the size of a struct kinfo_proc2. 1773 */ 1774 error = copyout(&klwp, dp, 1775 min(sizeof(klwp), elem_size)); 1776 if (error) 1777 goto cleanup; 1778 dp += elem_size; 1779 buflen -= elem_size; 1780 elem_count--; 1781 } 1782 needed += elem_size; 1783 } 1784 1785 if (where != NULL) { 1786 *sizep = dp - where; 1787 if (needed > *sizep) 1788 return (ENOMEM); 1789 } else { 1790 needed += KERN_PROCSLOP; 1791 *sizep = needed; 1792 } 1793 return (0); 1794 cleanup: 1795 return (error); 1796 } 1797 1798 /* 1799 * Fill in an eproc structure for the specified process. 1800 */ 1801 void 1802 fill_eproc(struct proc *p, struct eproc *ep) 1803 { 1804 struct tty *tp; 1805 struct lwp *l; 1806 1807 ep->e_paddr = p; 1808 ep->e_sess = p->p_session; 1809 ep->e_pcred = *p->p_cred; 1810 ep->e_ucred = *p->p_ucred; 1811 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1812 ep->e_vm.vm_rssize = 0; 1813 ep->e_vm.vm_tsize = 0; 1814 ep->e_vm.vm_dsize = 0; 1815 ep->e_vm.vm_ssize = 0; 1816 /* ep->e_vm.vm_pmap = XXX; */ 1817 } else { 1818 struct vmspace *vm = p->p_vmspace; 1819 1820 ep->e_vm.vm_rssize = vm_resident_count(vm); 1821 ep->e_vm.vm_tsize = vm->vm_tsize; 1822 ep->e_vm.vm_dsize = vm->vm_dsize; 1823 ep->e_vm.vm_ssize = vm->vm_ssize; 1824 1825 /* Pick a "representative" LWP */ 1826 l = proc_representative_lwp(p); 1827 1828 if (l->l_wmesg) 1829 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1830 } 1831 if (p->p_pptr) 1832 ep->e_ppid = p->p_pptr->p_pid; 1833 else 1834 ep->e_ppid = 0; 1835 ep->e_pgid = p->p_pgrp->pg_id; 1836 ep->e_sid = ep->e_sess->s_sid; 1837 ep->e_jobc = p->p_pgrp->pg_jobc; 1838 if ((p->p_flag & P_CONTROLT) && 1839 (tp = ep->e_sess->s_ttyp)) { 1840 ep->e_tdev = tp->t_dev; 1841 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1842 ep->e_tsess = tp->t_session; 1843 } else 1844 ep->e_tdev = NODEV; 1845 1846 ep->e_xsize = ep->e_xrssize = 0; 1847 ep->e_xccount = ep->e_xswrss = 0; 1848 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1849 if (SESS_LEADER(p)) 1850 ep->e_flag |= EPROC_SLEADER; 1851 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1852 } 1853 1854 /* 1855 * Fill in an eproc structure for the specified process. 1856 */ 1857 static void 1858 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1859 { 1860 struct tty *tp; 1861 struct lwp *l; 1862 struct timeval ut, st; 1863 1864 memset(ki, 0, sizeof(*ki)); 1865 1866 ki->p_paddr = PTRTOINT64(p); 1867 ki->p_fd = PTRTOINT64(p->p_fd); 1868 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1869 ki->p_stats = PTRTOINT64(p->p_stats); 1870 ki->p_limit = PTRTOINT64(p->p_limit); 1871 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1872 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1873 ki->p_sess = PTRTOINT64(p->p_session); 1874 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1875 ki->p_ru = PTRTOINT64(p->p_ru); 1876 1877 ki->p_eflag = 0; 1878 ki->p_exitsig = p->p_exitsig; 1879 ki->p_flag = p->p_flag; 1880 1881 ki->p_pid = p->p_pid; 1882 if (p->p_pptr) 1883 ki->p_ppid = p->p_pptr->p_pid; 1884 else 1885 ki->p_ppid = 0; 1886 ki->p_sid = p->p_session->s_sid; 1887 ki->p__pgid = p->p_pgrp->pg_id; 1888 1889 ki->p_tpgid = NO_PGID; /* may be changed if controlling tty below */ 1890 1891 ki->p_uid = p->p_ucred->cr_uid; 1892 ki->p_ruid = p->p_cred->p_ruid; 1893 ki->p_gid = p->p_ucred->cr_gid; 1894 ki->p_rgid = p->p_cred->p_rgid; 1895 ki->p_svuid = p->p_cred->p_svuid; 1896 ki->p_svgid = p->p_cred->p_svgid; 1897 1898 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1899 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1900 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1901 1902 ki->p_jobc = p->p_pgrp->pg_jobc; 1903 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1904 ki->p_tdev = tp->t_dev; 1905 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1906 ki->p_tsess = PTRTOINT64(tp->t_session); 1907 } else { 1908 ki->p_tdev = NODEV; 1909 } 1910 1911 ki->p_estcpu = p->p_estcpu; 1912 ki->p_rtime_sec = p->p_rtime.tv_sec; 1913 ki->p_rtime_usec = p->p_rtime.tv_usec; 1914 ki->p_cpticks = p->p_cpticks; 1915 ki->p_pctcpu = p->p_pctcpu; 1916 1917 ki->p_uticks = p->p_uticks; 1918 ki->p_sticks = p->p_sticks; 1919 ki->p_iticks = p->p_iticks; 1920 1921 ki->p_tracep = PTRTOINT64(p->p_tracep); 1922 ki->p_traceflag = p->p_traceflag; 1923 1924 1925 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1926 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1927 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1928 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1929 1930 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1931 ki->p_realstat = p->p_stat; 1932 ki->p_nice = p->p_nice; 1933 1934 ki->p_xstat = p->p_xstat; 1935 ki->p_acflag = p->p_acflag; 1936 1937 strncpy(ki->p_comm, p->p_comm, 1938 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1939 1940 strncpy(ki->p_login, p->p_session->s_login, 1941 min(sizeof ki->p_login - 1, sizeof p->p_session->s_login)); 1942 1943 ki->p_nlwps = p->p_nlwps; 1944 ki->p_nrlwps = p->p_nrlwps; 1945 ki->p_realflag = p->p_flag; 1946 1947 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1948 ki->p_vm_rssize = 0; 1949 ki->p_vm_tsize = 0; 1950 ki->p_vm_dsize = 0; 1951 ki->p_vm_ssize = 0; 1952 l = NULL; 1953 } else { 1954 struct vmspace *vm = p->p_vmspace; 1955 1956 ki->p_vm_rssize = vm_resident_count(vm); 1957 ki->p_vm_tsize = vm->vm_tsize; 1958 ki->p_vm_dsize = vm->vm_dsize; 1959 ki->p_vm_ssize = vm->vm_ssize; 1960 1961 /* Pick a "representative" LWP */ 1962 l = proc_representative_lwp(p); 1963 ki->p_forw = PTRTOINT64(l->l_forw); 1964 ki->p_back = PTRTOINT64(l->l_back); 1965 ki->p_addr = PTRTOINT64(l->l_addr); 1966 ki->p_stat = l->l_stat; 1967 ki->p_flag |= l->l_flag; 1968 ki->p_swtime = l->l_swtime; 1969 ki->p_slptime = l->l_slptime; 1970 if (l->l_stat == LSONPROC) { 1971 KDASSERT(l->l_cpu != NULL); 1972 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1973 } else 1974 ki->p_schedflags = 0; 1975 ki->p_holdcnt = l->l_holdcnt; 1976 ki->p_priority = l->l_priority; 1977 ki->p_usrpri = l->l_usrpri; 1978 if (l->l_wmesg) 1979 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1980 ki->p_wchan = PTRTOINT64(l->l_wchan); 1981 1982 } 1983 1984 if (p->p_session->s_ttyvp) 1985 ki->p_eflag |= EPROC_CTTY; 1986 if (SESS_LEADER(p)) 1987 ki->p_eflag |= EPROC_SLEADER; 1988 1989 /* XXX Is this double check necessary? */ 1990 if (P_ZOMBIE(p)) { 1991 ki->p_uvalid = 0; 1992 } else { 1993 ki->p_uvalid = 1; 1994 1995 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1996 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1997 1998 calcru(p, &ut, &st, 0); 1999 ki->p_uutime_sec = ut.tv_sec; 2000 ki->p_uutime_usec = ut.tv_usec; 2001 ki->p_ustime_sec = st.tv_sec; 2002 ki->p_ustime_usec = st.tv_usec; 2003 2004 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 2005 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 2006 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 2007 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 2008 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 2009 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 2010 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 2011 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 2012 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 2013 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 2014 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 2015 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 2016 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 2017 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 2018 2019 timeradd(&p->p_stats->p_cru.ru_utime, 2020 &p->p_stats->p_cru.ru_stime, &ut); 2021 ki->p_uctime_sec = ut.tv_sec; 2022 ki->p_uctime_usec = ut.tv_usec; 2023 } 2024 #ifdef MULTIPROCESSOR 2025 if (l && l->l_cpu != NULL) 2026 ki->p_cpuid = l->l_cpu->ci_cpuid; 2027 else 2028 #endif 2029 ki->p_cpuid = KI_NOCPU; 2030 2031 } 2032 2033 /* 2034 * Fill in a kinfo_lwp structure for the specified lwp. 2035 */ 2036 static void 2037 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 2038 { 2039 2040 kl->l_forw = PTRTOINT64(l->l_forw); 2041 kl->l_back = PTRTOINT64(l->l_back); 2042 kl->l_laddr = PTRTOINT64(l); 2043 kl->l_addr = PTRTOINT64(l->l_addr); 2044 kl->l_stat = l->l_stat; 2045 kl->l_lid = l->l_lid; 2046 kl->l_flag = l->l_flag; 2047 2048 kl->l_swtime = l->l_swtime; 2049 kl->l_slptime = l->l_slptime; 2050 if (l->l_stat == LSONPROC) { 2051 KDASSERT(l->l_cpu != NULL); 2052 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 2053 } else 2054 kl->l_schedflags = 0; 2055 kl->l_holdcnt = l->l_holdcnt; 2056 kl->l_priority = l->l_priority; 2057 kl->l_usrpri = l->l_usrpri; 2058 if (l->l_wmesg) 2059 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 2060 kl->l_wchan = PTRTOINT64(l->l_wchan); 2061 #ifdef MULTIPROCESSOR 2062 if (l->l_cpu != NULL) 2063 kl->l_cpuid = l->l_cpu->ci_cpuid; 2064 else 2065 #endif 2066 kl->l_cpuid = KI_NOCPU; 2067 } 2068 2069 int 2070 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 2071 struct proc *up) 2072 { 2073 struct ps_strings pss; 2074 struct proc *p; 2075 size_t len, upper_bound, xlen, i; 2076 struct uio auio; 2077 struct iovec aiov; 2078 vaddr_t argv; 2079 pid_t pid; 2080 int nargv, type, error; 2081 char *arg; 2082 char *tmp; 2083 2084 if (namelen != 2) 2085 return (EINVAL); 2086 pid = name[0]; 2087 type = name[1]; 2088 2089 switch (type) { 2090 case KERN_PROC_ARGV: 2091 case KERN_PROC_NARGV: 2092 case KERN_PROC_ENV: 2093 case KERN_PROC_NENV: 2094 /* ok */ 2095 break; 2096 default: 2097 return (EINVAL); 2098 } 2099 2100 /* check pid */ 2101 if ((p = pfind(pid)) == NULL) 2102 return (EINVAL); 2103 2104 /* only root or same user change look at the environment */ 2105 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 2106 if (up->p_ucred->cr_uid != 0) { 2107 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 2108 up->p_cred->p_ruid != p->p_cred->p_svuid) 2109 return (EPERM); 2110 } 2111 } 2112 2113 if (sizep != NULL && where == NULL) { 2114 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 2115 *sizep = sizeof (int); 2116 else 2117 *sizep = ARG_MAX; /* XXX XXX XXX */ 2118 return (0); 2119 } 2120 if (where == NULL || sizep == NULL) 2121 return (EINVAL); 2122 2123 /* 2124 * Zombies don't have a stack, so we can't read their psstrings. 2125 * System processes also don't have a user stack. 2126 */ 2127 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 2128 return (EINVAL); 2129 2130 /* 2131 * Lock the process down in memory. 2132 */ 2133 /* XXXCDC: how should locking work here? */ 2134 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 2135 return (EFAULT); 2136 2137 p->p_vmspace->vm_refcnt++; /* XXX */ 2138 2139 /* 2140 * Allocate a temporary buffer to hold the arguments. 2141 */ 2142 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2143 2144 /* 2145 * Read in the ps_strings structure. 2146 */ 2147 aiov.iov_base = &pss; 2148 aiov.iov_len = sizeof(pss); 2149 auio.uio_iov = &aiov; 2150 auio.uio_iovcnt = 1; 2151 auio.uio_offset = (vaddr_t)p->p_psstr; 2152 auio.uio_resid = sizeof(pss); 2153 auio.uio_segflg = UIO_SYSSPACE; 2154 auio.uio_rw = UIO_READ; 2155 auio.uio_procp = NULL; 2156 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2157 if (error) 2158 goto done; 2159 2160 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2161 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2162 else 2163 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2164 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2165 error = copyout(&nargv, where, sizeof(nargv)); 2166 *sizep = sizeof(nargv); 2167 goto done; 2168 } 2169 /* 2170 * Now read the address of the argument vector. 2171 */ 2172 switch (type) { 2173 case KERN_PROC_ARGV: 2174 /* XXX compat32 stuff here */ 2175 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2176 break; 2177 case KERN_PROC_ENV: 2178 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2179 break; 2180 default: 2181 return (EINVAL); 2182 } 2183 auio.uio_offset = (off_t)(long)tmp; 2184 aiov.iov_base = &argv; 2185 aiov.iov_len = sizeof(argv); 2186 auio.uio_iov = &aiov; 2187 auio.uio_iovcnt = 1; 2188 auio.uio_resid = sizeof(argv); 2189 auio.uio_segflg = UIO_SYSSPACE; 2190 auio.uio_rw = UIO_READ; 2191 auio.uio_procp = NULL; 2192 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2193 if (error) 2194 goto done; 2195 2196 /* 2197 * Now copy in the actual argument vector, one page at a time, 2198 * since we don't know how long the vector is (though, we do 2199 * know how many NUL-terminated strings are in the vector). 2200 */ 2201 len = 0; 2202 upper_bound = *sizep; 2203 for (; nargv != 0 && len < upper_bound; len += xlen) { 2204 aiov.iov_base = arg; 2205 aiov.iov_len = PAGE_SIZE; 2206 auio.uio_iov = &aiov; 2207 auio.uio_iovcnt = 1; 2208 auio.uio_offset = argv + len; 2209 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2210 auio.uio_resid = xlen; 2211 auio.uio_segflg = UIO_SYSSPACE; 2212 auio.uio_rw = UIO_READ; 2213 auio.uio_procp = NULL; 2214 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2215 if (error) 2216 goto done; 2217 2218 for (i = 0; i < xlen && nargv != 0; i++) { 2219 if (arg[i] == '\0') 2220 nargv--; /* one full string */ 2221 } 2222 2223 /* 2224 * Make sure we don't copyout past the end of the user's 2225 * buffer. 2226 */ 2227 if (len + i > upper_bound) 2228 i = upper_bound - len; 2229 2230 error = copyout(arg, (char *)where + len, i); 2231 if (error) 2232 break; 2233 2234 if (nargv == 0) { 2235 len += i; 2236 break; 2237 } 2238 } 2239 *sizep = len; 2240 2241 done: 2242 uvmspace_free(p->p_vmspace); 2243 2244 free(arg, M_TEMP); 2245 return (error); 2246 } 2247 2248 #if NPTY > 0 2249 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2250 2251 /* 2252 * Validate parameters and get old / set new parameters 2253 * for pty sysctl function. 2254 */ 2255 static int 2256 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2257 { 2258 int error = 0; 2259 int oldmax = 0, newmax = 0; 2260 2261 /* get current value of maxptys */ 2262 oldmax = pty_maxptys(0, 0); 2263 2264 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2265 2266 if (!error && newp) { 2267 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2268 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2269 2270 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2271 return (EINVAL); 2272 2273 } 2274 2275 return (error); 2276 } 2277 #endif /* NPTY > 0 */ 2278 2279 static int 2280 sysctl_dotkstat(int *name, u_int namelen, void *where, size_t *sizep, 2281 void *newp) 2282 { 2283 2284 /* all sysctl names at this level are terminal */ 2285 if (namelen != 1) 2286 return (ENOTDIR); /* overloaded */ 2287 2288 switch (name[0]) { 2289 case KERN_TKSTAT_NIN: 2290 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2291 case KERN_TKSTAT_NOUT: 2292 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2293 case KERN_TKSTAT_CANCC: 2294 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2295 case KERN_TKSTAT_RAWCC: 2296 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2297 default: 2298 return (EOPNOTSUPP); 2299 } 2300 } 2301
Indexes created Tue Sep 30 06:09:59 GMT 2025