kern_sysctl.c revision 1.123
1 /* $NetBSD: kern_sysctl.c,v 1.123 2003/01/18 10:06:31 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95 39 */ 40 41 /* 42 * sysctl system call. 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: kern_sysctl.c,v 1.123 2003/01/18 10:06:31 thorpej Exp $"); 47 48 #include "opt_ddb.h" 49 #include "opt_insecure.h" 50 #include "opt_defcorename.h" 51 #include "opt_pipe.h" 52 #include "opt_sysv.h" 53 #include "pty.h" 54 #include "rnd.h" 55 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/kernel.h> 59 #include <sys/buf.h> 60 #include <sys/device.h> 61 #include <sys/disklabel.h> 62 #include <sys/dkstat.h> 63 #include <sys/exec.h> 64 #include <sys/file.h> 65 #include <sys/ioctl.h> 66 #include <sys/malloc.h> 67 #include <sys/mount.h> 68 #include <sys/msgbuf.h> 69 #include <sys/pool.h> 70 #include <sys/proc.h> 71 #include <sys/resource.h> 72 #include <sys/resourcevar.h> 73 #include <sys/sa.h> 74 #include <sys/syscallargs.h> 75 #include <sys/tty.h> 76 #include <sys/unistd.h> 77 #include <sys/vnode.h> 78 #include <sys/socketvar.h> 79 #define __SYSCTL_PRIVATE 80 #include <sys/sysctl.h> 81 #include <sys/lock.h> 82 #include <sys/namei.h> 83 84 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 85 #include <sys/ipc.h> 86 #endif 87 #ifdef SYSVMSG 88 #include <sys/msg.h> 89 #endif 90 #ifdef SYSVSEM 91 #include <sys/sem.h> 92 #endif 93 #ifdef SYSVSHM 94 #include <sys/shm.h> 95 #endif 96 97 #include <dev/cons.h> 98 99 #if defined(DDB) 100 #include <ddb/ddbvar.h> 101 #endif 102 103 #ifndef PIPE_SOCKETPAIR 104 #include <sys/pipe.h> 105 #endif 106 107 #if NRND > 0 108 #include <sys/rnd.h> 109 #endif 110 111 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 112 113 static int sysctl_file(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 size_t *oldlenp; 164 165 /* 166 * all top-level sysctl names are non-terminal 167 */ 168 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 169 return (EINVAL); 170 error = copyin(SCARG(uap, name), &name, 171 SCARG(uap, namelen) * sizeof(int)); 172 if (error) 173 return (error); 174 175 /* 176 * For all but CTL_PROC, must be root to change a value. 177 * For CTL_PROC, must be root, or owner of the proc (and not suid), 178 * this is checked in proc_sysctl() (once we know the targer proc). 179 */ 180 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 181 (error = suser(p->p_ucred, &p->p_acflag))) 182 return error; 183 184 switch (name[0]) { 185 case CTL_KERN: 186 fn = kern_sysctl; 187 break; 188 case CTL_HW: 189 fn = hw_sysctl; 190 break; 191 case CTL_VM: 192 fn = uvm_sysctl; 193 break; 194 case CTL_NET: 195 fn = net_sysctl; 196 break; 197 case CTL_VFS: 198 fn = vfs_sysctl; 199 break; 200 case CTL_MACHDEP: 201 fn = cpu_sysctl; 202 break; 203 #ifdef DEBUG 204 case CTL_DEBUG: 205 fn = debug_sysctl; 206 break; 207 #endif 208 #ifdef DDB 209 case CTL_DDB: 210 fn = ddb_sysctl; 211 break; 212 #endif 213 case CTL_PROC: 214 fn = proc_sysctl; 215 break; 216 217 case CTL_EMUL: 218 fn = emul_sysctl; 219 break; 220 default: 221 return (EOPNOTSUPP); 222 } 223 224 /* 225 * XXX Hey, we wire `old', but what about `new'? 226 */ 227 228 oldlenp = SCARG(uap, oldlenp); 229 if (oldlenp) { 230 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 231 return (error); 232 oldlenp = &oldlen; 233 } 234 if (SCARG(uap, old) != NULL) { 235 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 236 if (error) 237 return (error); 238 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 239 if (error) { 240 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 241 return error; 242 } 243 savelen = oldlen; 244 } 245 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 246 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 247 if (SCARG(uap, old) != NULL) { 248 uvm_vsunlock(p, SCARG(uap, old), savelen); 249 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 250 } 251 if (error) 252 return (error); 253 if (SCARG(uap, oldlenp)) 254 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 255 return (error); 256 } 257 258 /* 259 * Attributes stored in the kernel. 260 */ 261 char hostname[MAXHOSTNAMELEN]; 262 int hostnamelen; 263 264 char domainname[MAXHOSTNAMELEN]; 265 int domainnamelen; 266 267 long hostid; 268 269 #ifdef INSECURE 270 int securelevel = -1; 271 #else 272 int securelevel = 0; 273 #endif 274 275 #ifndef DEFCORENAME 276 #define DEFCORENAME "%n.core" 277 #endif 278 char defcorename[MAXPATHLEN] = DEFCORENAME; 279 int defcorenamelen = sizeof(DEFCORENAME); 280 281 extern int kern_logsigexit; 282 extern fixpt_t ccpu; 283 extern int forkfsleep; 284 285 #ifndef MULTIPROCESSOR 286 #define sysctl_ncpus() 1 287 #endif 288 289 #ifdef MULTIPROCESSOR 290 291 #ifndef CPU_INFO_FOREACH 292 #define CPU_INFO_ITERATOR int 293 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 294 #endif 295 296 static int 297 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 298 { 299 u_int64_t cp_time[CPUSTATES]; 300 int i; 301 struct cpu_info *ci; 302 CPU_INFO_ITERATOR cii; 303 304 for (i = 0; i < CPUSTATES; i++) 305 cp_time[i] = 0; 306 307 for (CPU_INFO_FOREACH(cii, ci)) { 308 for (i = 0; i < CPUSTATES; i++) 309 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 310 } 311 return (sysctl_rdstruct(oldp, oldlenp, newp, 312 cp_time, sizeof(cp_time))); 313 } 314 315 static int 316 sysctl_ncpus(void) 317 { 318 struct cpu_info *ci; 319 CPU_INFO_ITERATOR cii; 320 321 int ncpus = 0; 322 for (CPU_INFO_FOREACH(cii, ci)) 323 ncpus++; 324 return ncpus; 325 } 326 327 #endif 328 329 /* 330 * kernel related system variables. 331 */ 332 int 333 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 334 void *newp, size_t newlen, struct proc *p) 335 { 336 int error, level, inthostid; 337 int old_autonicetime; 338 int old_vnodes; 339 dev_t consdev; 340 #if NRND > 0 341 int v; 342 #endif 343 344 /* All sysctl names at this level, except for a few, are terminal. */ 345 switch (name[0]) { 346 case KERN_PROC: 347 case KERN_PROC2: 348 case KERN_LWP: 349 case KERN_PROF: 350 case KERN_MBUF: 351 case KERN_PROC_ARGS: 352 case KERN_SYSVIPC_INFO: 353 case KERN_PIPE: 354 case KERN_TKSTAT: 355 /* Not terminal. */ 356 break; 357 default: 358 if (namelen != 1) 359 return (ENOTDIR); /* overloaded */ 360 } 361 362 switch (name[0]) { 363 case KERN_OSTYPE: 364 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 365 case KERN_OSRELEASE: 366 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 367 case KERN_OSREV: 368 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 369 case KERN_VERSION: 370 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 371 case KERN_MAXVNODES: 372 old_vnodes = desiredvnodes; 373 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 374 if (newp && !error) { 375 if (old_vnodes > desiredvnodes) { 376 desiredvnodes = old_vnodes; 377 return (EINVAL); 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 - PID_SKIP) 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_MSGBUFSIZE: 494 /* 495 * deal with cases where the message buffer has 496 * become corrupted. 497 */ 498 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 499 msgbufenabled = 0; 500 return (ENXIO); 501 } 502 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 503 case KERN_FSYNC: 504 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 505 case KERN_SYSVMSG: 506 #ifdef SYSVMSG 507 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 508 #else 509 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 510 #endif 511 case KERN_SYSVSEM: 512 #ifdef SYSVSEM 513 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 514 #else 515 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 516 #endif 517 case KERN_SYSVSHM: 518 #ifdef SYSVSHM 519 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 520 #else 521 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 522 #endif 523 case KERN_DEFCORENAME: 524 if (newp && newlen < 1) 525 return (EINVAL); 526 error = sysctl_string(oldp, oldlenp, newp, newlen, 527 defcorename, sizeof(defcorename)); 528 if (newp && !error) 529 defcorenamelen = newlen; 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_SBMAX: 588 { 589 int new_sbmax = sb_max; 590 591 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 592 if (newp && !error) { 593 if (new_sbmax < (16 * 1024)) /* sanity */ 594 return (EINVAL); 595 sb_max = new_sbmax; 596 } 597 return (error); 598 } 599 case KERN_TKSTAT: 600 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 601 newp)); 602 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 603 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 604 case KERN_URND: 605 #if NRND > 0 606 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 607 sizeof(v)) 608 return (sysctl_rdint(oldp, oldlenp, newp, v)); 609 else 610 return (EIO); /*XXX*/ 611 #else 612 return (EOPNOTSUPP); 613 #endif 614 case KERN_LABELSECTOR: 615 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 616 case KERN_LABELOFFSET: 617 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 618 case KERN_FORKFSLEEP: 619 { 620 /* userland sees value in ms, internally is in ticks */ 621 int timo, lsleep = forkfsleep * 1000 / hz; 622 623 error = (sysctl_int(oldp, oldlenp, newp, newlen, &lsleep)); 624 if (newp && !error) { 625 /* refuse negative values, and overly 'long time' */ 626 if (lsleep < 0 || lsleep > MAXSLP * 1000) 627 return (EINVAL); 628 629 timo = mstohz(lsleep); 630 631 /* if the interval is >0 ms && <1 tick, use 1 tick */ 632 if (lsleep != 0 && timo == 0) 633 forkfsleep = 1; 634 else 635 forkfsleep = timo; 636 } 637 return (error); 638 } 639 640 default: 641 return (EOPNOTSUPP); 642 } 643 /* NOTREACHED */ 644 } 645 646 /* 647 * hardware related system variables. 648 */ 649 int 650 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 651 void *newp, size_t newlen, struct proc *p) 652 { 653 654 /* All sysctl names at this level, except for a few, are terminal. */ 655 switch (name[0]) { 656 case HW_DISKSTATS: 657 /* Not terminal. */ 658 break; 659 default: 660 if (namelen != 1) 661 return (ENOTDIR); /* overloaded */ 662 } 663 664 switch (name[0]) { 665 case HW_MACHINE: 666 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 667 case HW_MACHINE_ARCH: 668 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 669 case HW_MODEL: 670 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 671 case HW_NCPU: 672 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 673 case HW_BYTEORDER: 674 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 675 case HW_PHYSMEM: 676 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 677 case HW_USERMEM: 678 return (sysctl_rdint(oldp, oldlenp, newp, 679 ctob(physmem - uvmexp.wired))); 680 case HW_PAGESIZE: 681 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 682 case HW_ALIGNBYTES: 683 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 684 case HW_DISKNAMES: 685 return (sysctl_disknames(oldp, oldlenp)); 686 case HW_DISKSTATS: 687 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 688 case HW_CNMAGIC: { 689 char magic[CNS_LEN]; 690 int error; 691 692 if (oldp) 693 cn_get_magic(magic, CNS_LEN); 694 error = sysctl_string(oldp, oldlenp, newp, newlen, 695 magic, sizeof(magic)); 696 if (newp && !error) { 697 error = cn_set_magic(magic); 698 } 699 return (error); 700 } 701 default: 702 return (EOPNOTSUPP); 703 } 704 /* NOTREACHED */ 705 } 706 707 #ifdef DEBUG 708 /* 709 * Debugging related system variables. 710 */ 711 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 712 struct ctldebug debug5, debug6, debug7, debug8, debug9; 713 struct ctldebug debug10, debug11, debug12, debug13, debug14; 714 struct ctldebug debug15, debug16, debug17, debug18, debug19; 715 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 716 &debug0, &debug1, &debug2, &debug3, &debug4, 717 &debug5, &debug6, &debug7, &debug8, &debug9, 718 &debug10, &debug11, &debug12, &debug13, &debug14, 719 &debug15, &debug16, &debug17, &debug18, &debug19, 720 }; 721 722 int 723 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 724 void *newp, size_t newlen, struct proc *p) 725 { 726 struct ctldebug *cdp; 727 728 /* all sysctl names at this level are name and field */ 729 if (namelen != 2) 730 return (ENOTDIR); /* overloaded */ 731 if (name[0] >= CTL_DEBUG_MAXID) 732 return (EOPNOTSUPP); 733 cdp = debugvars[name[0]]; 734 if (cdp->debugname == 0) 735 return (EOPNOTSUPP); 736 switch (name[1]) { 737 case CTL_DEBUG_NAME: 738 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 739 case CTL_DEBUG_VALUE: 740 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 741 default: 742 return (EOPNOTSUPP); 743 } 744 /* NOTREACHED */ 745 } 746 #endif /* DEBUG */ 747 748 int 749 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 750 void *newp, size_t newlen, struct proc *p) 751 { 752 struct proc *ptmp = NULL; 753 const struct proclist_desc *pd; 754 int error = 0; 755 struct rlimit alim; 756 struct plimit *newplim; 757 char *tmps = NULL; 758 size_t len, curlen; 759 u_int i; 760 761 if (namelen < 2) 762 return EINVAL; 763 764 if (name[0] == PROC_CURPROC) { 765 ptmp = p; 766 } else { 767 proclist_lock_read(); 768 for (pd = proclists; pd->pd_list != NULL; pd++) { 769 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 770 ptmp = LIST_NEXT(ptmp, p_list)) { 771 /* Skip embryonic processes. */ 772 if (ptmp->p_stat == SIDL) 773 continue; 774 if (ptmp->p_pid == (pid_t)name[0]) 775 break; 776 } 777 if (ptmp != NULL) 778 break; 779 } 780 proclist_unlock_read(); 781 if (ptmp == NULL) 782 return(ESRCH); 783 if (p->p_ucred->cr_uid != 0) { 784 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 785 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 786 return EPERM; 787 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 788 return EPERM; /* sgid proc */ 789 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 790 if (p->p_ucred->cr_groups[i] == 791 ptmp->p_cred->p_rgid) 792 break; 793 } 794 if (i == p->p_ucred->cr_ngroups) 795 return EPERM; 796 } 797 } 798 switch(name[1]) { 799 case PROC_PID_STOPFORK: 800 if (namelen != 2) 801 return EINVAL; 802 i = ((ptmp->p_flag & P_STOPFORK) != 0); 803 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 804 return error; 805 if (i != 0) 806 ptmp->p_flag |= P_STOPFORK; 807 else 808 ptmp->p_flag &= ~P_STOPFORK; 809 return 0; 810 break; 811 812 case PROC_PID_STOPEXEC: 813 if (namelen != 2) 814 return EINVAL; 815 i = ((ptmp->p_flag & P_STOPEXEC) != 0); 816 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 817 return error; 818 if (i != 0) 819 ptmp->p_flag |= P_STOPEXEC; 820 else 821 ptmp->p_flag &= ~P_STOPEXEC; 822 return 0; 823 break; 824 825 case PROC_PID_CORENAME: 826 if (namelen != 2) 827 return EINVAL; 828 /* 829 * Can't use sysctl_string() here because we may malloc a new 830 * area during the process, so we have to do it by hand. 831 */ 832 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 833 if (oldlenp && *oldlenp < curlen) { 834 if (!oldp) 835 *oldlenp = curlen; 836 return (ENOMEM); 837 } 838 if (newp) { 839 if (securelevel > 2) 840 return EPERM; 841 if (newlen > MAXPATHLEN) 842 return ENAMETOOLONG; 843 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 844 if (tmps == NULL) 845 return ENOMEM; 846 error = copyin(newp, tmps, newlen + 1); 847 tmps[newlen] = '\0'; 848 if (error) 849 goto cleanup; 850 /* Enforce to be either 'core' for end with '.core' */ 851 if (newlen < 4) { /* c.o.r.e */ 852 error = EINVAL; 853 goto cleanup; 854 } 855 len = newlen - 4; 856 if (len > 0) { 857 if (tmps[len - 1] != '.' && 858 tmps[len - 1] != '/') { 859 error = EINVAL; 860 goto cleanup; 861 } 862 } 863 if (strcmp(&tmps[len], "core") != 0) { 864 error = EINVAL; 865 goto cleanup; 866 } 867 } 868 if (oldp && oldlenp) { 869 *oldlenp = curlen; 870 error = copyout(ptmp->p_limit->pl_corename, oldp, 871 curlen); 872 } 873 if (newp && error == 0) { 874 /* if the 2 strings are identical, don't limcopy() */ 875 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 876 error = 0; 877 goto cleanup; 878 } 879 if (ptmp->p_limit->p_refcnt > 1 && 880 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 881 newplim = limcopy(ptmp->p_limit); 882 limfree(ptmp->p_limit); 883 ptmp->p_limit = newplim; 884 } 885 if (ptmp->p_limit->pl_corename != defcorename) { 886 free(ptmp->p_limit->pl_corename, M_TEMP); 887 } 888 ptmp->p_limit->pl_corename = tmps; 889 return (0); 890 } 891 cleanup: 892 if (tmps) 893 free(tmps, M_TEMP); 894 return (error); 895 break; 896 897 case PROC_PID_LIMIT: 898 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 899 return EINVAL; 900 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 901 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 902 error = sysctl_quad(oldp, oldlenp, newp, newlen, 903 &alim.rlim_max); 904 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 905 error = sysctl_quad(oldp, oldlenp, newp, newlen, 906 &alim.rlim_cur); 907 else 908 error = EINVAL; 909 910 if (error) 911 return error; 912 913 if (newp) 914 error = dosetrlimit(ptmp, p->p_cred, 915 name[2] - 1, &alim); 916 return error; 917 break; 918 919 default: 920 return (EINVAL); 921 break; 922 } 923 /* NOTREACHED */ 924 return (EINVAL); 925 } 926 927 int 928 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 929 void *newp, size_t newlen, struct proc *p) 930 { 931 static struct { 932 const char *name; 933 int type; 934 } emulations[] = CTL_EMUL_NAMES; 935 const struct emul *e; 936 const char *ename; 937 #ifdef LKM 938 extern struct lock exec_lock; /* XXX */ 939 int error; 940 #else 941 extern int nexecs_builtin; 942 extern const struct execsw execsw_builtin[]; 943 int i; 944 #endif 945 946 /* all sysctl names at this level are name and field */ 947 if (namelen < 2) 948 return (ENOTDIR); /* overloaded */ 949 950 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 951 return (EOPNOTSUPP); 952 953 ename = emulations[name[0]].name; 954 955 #ifdef LKM 956 lockmgr(&exec_lock, LK_SHARED, NULL); 957 if ((e = emul_search(ename))) { 958 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 959 newp, newlen, p); 960 } else 961 error = EOPNOTSUPP; 962 lockmgr(&exec_lock, LK_RELEASE, NULL); 963 964 return (error); 965 #else 966 for (i = 0; i < nexecs_builtin; i++) { 967 e = execsw_builtin[i].es_emul; 968 /* 969 * In order to match e.g. e->e_name "irix o32" with ename "irix", 970 * we limit the comparison to the length of ename. 971 */ 972 if (e == NULL || strncmp(ename, e->e_name, strlen(ename)) != 0 || 973 e->e_sysctl == NULL) 974 continue; 975 976 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 977 newp, newlen, p); 978 } 979 980 return (EOPNOTSUPP); 981 #endif 982 } 983 /* 984 * Convenience macros. 985 */ 986 987 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 988 if (oldlenp) { \ 989 if (!oldp) \ 990 *oldlenp = len; \ 991 else { \ 992 if (*oldlenp < len) \ 993 return(ENOMEM); \ 994 *oldlenp = len; \ 995 error = copyout((caddr_t)valp, oldp, len); \ 996 } \ 997 } 998 999 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 1000 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 1001 1002 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 1003 if (newp && newlen != len) \ 1004 return (EINVAL); 1005 1006 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1007 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1008 1009 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1010 if (error == 0 && newp) \ 1011 error = copyin(newp, valp, len); 1012 1013 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1014 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1015 1016 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1017 if (oldlenp) { \ 1018 len = strlen(str) + 1; \ 1019 if (!oldp) \ 1020 *oldlenp = len; \ 1021 else { \ 1022 if (*oldlenp < len) { \ 1023 err2 = ENOMEM; \ 1024 len = *oldlenp; \ 1025 } else \ 1026 *oldlenp = len; \ 1027 error = copyout(str, oldp, len);\ 1028 if (error == 0) \ 1029 error = err2; \ 1030 } \ 1031 } 1032 1033 /* 1034 * Validate parameters and get old / set new parameters 1035 * for an integer-valued sysctl function. 1036 */ 1037 int 1038 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1039 { 1040 int error = 0; 1041 1042 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1043 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1044 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1045 1046 return (error); 1047 } 1048 1049 1050 /* 1051 * As above, but read-only. 1052 */ 1053 int 1054 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1055 { 1056 int error = 0; 1057 1058 if (newp) 1059 return (EPERM); 1060 1061 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1062 1063 return (error); 1064 } 1065 1066 /* 1067 * Validate parameters and get old / set new parameters 1068 * for an quad-valued sysctl function. 1069 */ 1070 int 1071 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1072 quad_t *valp) 1073 { 1074 int error = 0; 1075 1076 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1077 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1078 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1079 1080 return (error); 1081 } 1082 1083 /* 1084 * As above, but read-only. 1085 */ 1086 int 1087 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1088 { 1089 int error = 0; 1090 1091 if (newp) 1092 return (EPERM); 1093 1094 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1095 1096 return (error); 1097 } 1098 1099 /* 1100 * Validate parameters and get old / set new parameters 1101 * for a string-valued sysctl function. 1102 */ 1103 int 1104 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1105 size_t maxlen) 1106 { 1107 int error = 0, err2 = 0; 1108 size_t len; 1109 1110 if (newp && newlen >= maxlen) 1111 return (EINVAL); 1112 1113 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1114 1115 if (error == 0 && newp) { 1116 error = copyin(newp, str, newlen); 1117 str[newlen] = 0; 1118 } 1119 return (error); 1120 } 1121 1122 /* 1123 * As above, but read-only. 1124 */ 1125 int 1126 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1127 { 1128 int error = 0, err2 = 0; 1129 size_t len; 1130 1131 if (newp) 1132 return (EPERM); 1133 1134 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1135 1136 return (error); 1137 } 1138 1139 /* 1140 * Validate parameters and get old / set new parameters 1141 * for a structure oriented sysctl function. 1142 */ 1143 int 1144 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1145 size_t len) 1146 { 1147 int error = 0; 1148 1149 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1150 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1151 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1152 1153 return (error); 1154 } 1155 1156 /* 1157 * Validate parameters and get old parameters 1158 * for a structure oriented sysctl function. 1159 */ 1160 int 1161 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1162 size_t len) 1163 { 1164 int error = 0; 1165 1166 if (newp) 1167 return (EPERM); 1168 1169 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1170 1171 return (error); 1172 } 1173 1174 /* 1175 * As above, but can return a truncated result. 1176 */ 1177 int 1178 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1179 size_t len) 1180 { 1181 int error = 0; 1182 1183 if (newp) 1184 return (EPERM); 1185 1186 len = min(*oldlenp, len); 1187 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1188 1189 return (error); 1190 } 1191 1192 /* 1193 * Get file structures. 1194 */ 1195 static int 1196 sysctl_file(void *vwhere, size_t *sizep) 1197 { 1198 int error; 1199 size_t buflen; 1200 struct file *fp; 1201 char *start, *where; 1202 1203 start = where = vwhere; 1204 buflen = *sizep; 1205 if (where == NULL) { 1206 /* 1207 * overestimate by 10 files 1208 */ 1209 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1210 return (0); 1211 } 1212 1213 /* 1214 * first copyout filehead 1215 */ 1216 if (buflen < sizeof(filehead)) { 1217 *sizep = 0; 1218 return (0); 1219 } 1220 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1221 if (error) 1222 return (error); 1223 buflen -= sizeof(filehead); 1224 where += sizeof(filehead); 1225 1226 /* 1227 * followed by an array of file structures 1228 */ 1229 LIST_FOREACH(fp, &filehead, f_list) { 1230 if (buflen < sizeof(struct file)) { 1231 *sizep = where - start; 1232 return (ENOMEM); 1233 } 1234 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1235 if (error) 1236 return (error); 1237 buflen -= sizeof(struct file); 1238 where += sizeof(struct file); 1239 } 1240 *sizep = where - start; 1241 return (0); 1242 } 1243 1244 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1245 #define FILL_PERM(src, dst) do { \ 1246 (dst)._key = (src)._key; \ 1247 (dst).uid = (src).uid; \ 1248 (dst).gid = (src).gid; \ 1249 (dst).cuid = (src).cuid; \ 1250 (dst).cgid = (src).cgid; \ 1251 (dst).mode = (src).mode; \ 1252 (dst)._seq = (src)._seq; \ 1253 } while (/*CONSTCOND*/ 0); 1254 #define FILL_MSG(src, dst) do { \ 1255 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1256 (dst).msg_qnum = (src).msg_qnum; \ 1257 (dst).msg_qbytes = (src).msg_qbytes; \ 1258 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1259 (dst).msg_lspid = (src).msg_lspid; \ 1260 (dst).msg_lrpid = (src).msg_lrpid; \ 1261 (dst).msg_stime = (src).msg_stime; \ 1262 (dst).msg_rtime = (src).msg_rtime; \ 1263 (dst).msg_ctime = (src).msg_ctime; \ 1264 } while (/*CONSTCOND*/ 0) 1265 #define FILL_SEM(src, dst) do { \ 1266 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1267 (dst).sem_nsems = (src).sem_nsems; \ 1268 (dst).sem_otime = (src).sem_otime; \ 1269 (dst).sem_ctime = (src).sem_ctime; \ 1270 } while (/*CONSTCOND*/ 0) 1271 #define FILL_SHM(src, dst) do { \ 1272 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1273 (dst).shm_segsz = (src).shm_segsz; \ 1274 (dst).shm_lpid = (src).shm_lpid; \ 1275 (dst).shm_cpid = (src).shm_cpid; \ 1276 (dst).shm_atime = (src).shm_atime; \ 1277 (dst).shm_dtime = (src).shm_dtime; \ 1278 (dst).shm_ctime = (src).shm_ctime; \ 1279 (dst).shm_nattch = (src).shm_nattch; \ 1280 } while (/*CONSTCOND*/ 0) 1281 1282 static int 1283 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1284 { 1285 #ifdef SYSVMSG 1286 struct msg_sysctl_info *msgsi = NULL; 1287 #endif 1288 #ifdef SYSVSEM 1289 struct sem_sysctl_info *semsi = NULL; 1290 #endif 1291 #ifdef SYSVSHM 1292 struct shm_sysctl_info *shmsi = NULL; 1293 #endif 1294 size_t infosize, dssize, tsize, buflen; 1295 void *buf = NULL; 1296 char *start; 1297 int32_t nds; 1298 int i, error, ret; 1299 1300 if (namelen != 1) 1301 return (EINVAL); 1302 1303 start = where; 1304 buflen = *sizep; 1305 1306 switch (*name) { 1307 case KERN_SYSVIPC_MSG_INFO: 1308 #ifdef SYSVMSG 1309 infosize = sizeof(msgsi->msginfo); 1310 nds = msginfo.msgmni; 1311 dssize = sizeof(msgsi->msgids[0]); 1312 break; 1313 #else 1314 return (EINVAL); 1315 #endif 1316 case KERN_SYSVIPC_SEM_INFO: 1317 #ifdef SYSVSEM 1318 infosize = sizeof(semsi->seminfo); 1319 nds = seminfo.semmni; 1320 dssize = sizeof(semsi->semids[0]); 1321 break; 1322 #else 1323 return (EINVAL); 1324 #endif 1325 case KERN_SYSVIPC_SHM_INFO: 1326 #ifdef SYSVSHM 1327 infosize = sizeof(shmsi->shminfo); 1328 nds = shminfo.shmmni; 1329 dssize = sizeof(shmsi->shmids[0]); 1330 break; 1331 #else 1332 return (EINVAL); 1333 #endif 1334 default: 1335 return (EINVAL); 1336 } 1337 /* 1338 * Round infosize to 64 bit boundary if requesting more than just 1339 * the info structure or getting the total data size. 1340 */ 1341 if (where == NULL || *sizep > infosize) 1342 infosize = ((infosize + 7) / 8) * 8; 1343 tsize = infosize + nds * dssize; 1344 1345 /* Return just the total size required. */ 1346 if (where == NULL) { 1347 *sizep = tsize; 1348 return (0); 1349 } 1350 1351 /* Not enough room for even the info struct. */ 1352 if (buflen < infosize) { 1353 *sizep = 0; 1354 return (ENOMEM); 1355 } 1356 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1357 memset(buf, 0, min(tsize, buflen)); 1358 1359 switch (*name) { 1360 #ifdef SYSVMSG 1361 case KERN_SYSVIPC_MSG_INFO: 1362 msgsi = (struct msg_sysctl_info *)buf; 1363 msgsi->msginfo = msginfo; 1364 break; 1365 #endif 1366 #ifdef SYSVSEM 1367 case KERN_SYSVIPC_SEM_INFO: 1368 semsi = (struct sem_sysctl_info *)buf; 1369 semsi->seminfo = seminfo; 1370 break; 1371 #endif 1372 #ifdef SYSVSHM 1373 case KERN_SYSVIPC_SHM_INFO: 1374 shmsi = (struct shm_sysctl_info *)buf; 1375 shmsi->shminfo = shminfo; 1376 break; 1377 #endif 1378 } 1379 buflen -= infosize; 1380 1381 ret = 0; 1382 if (buflen > 0) { 1383 /* Fill in the IPC data structures. */ 1384 for (i = 0; i < nds; i++) { 1385 if (buflen < dssize) { 1386 ret = ENOMEM; 1387 break; 1388 } 1389 switch (*name) { 1390 #ifdef SYSVMSG 1391 case KERN_SYSVIPC_MSG_INFO: 1392 FILL_MSG(msqids[i], msgsi->msgids[i]); 1393 break; 1394 #endif 1395 #ifdef SYSVSEM 1396 case KERN_SYSVIPC_SEM_INFO: 1397 FILL_SEM(sema[i], semsi->semids[i]); 1398 break; 1399 #endif 1400 #ifdef SYSVSHM 1401 case KERN_SYSVIPC_SHM_INFO: 1402 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1403 break; 1404 #endif 1405 } 1406 buflen -= dssize; 1407 } 1408 } 1409 *sizep -= buflen; 1410 error = copyout(buf, start, *sizep); 1411 /* If copyout succeeded, use return code set earlier. */ 1412 if (error == 0) 1413 error = ret; 1414 if (buf) 1415 free(buf, M_TEMP); 1416 return (error); 1417 } 1418 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1419 1420 static int 1421 sysctl_msgbuf(void *vwhere, size_t *sizep) 1422 { 1423 char *where = vwhere; 1424 size_t len, maxlen = *sizep; 1425 long beg, end; 1426 int error; 1427 1428 /* 1429 * deal with cases where the message buffer has 1430 * become corrupted. 1431 */ 1432 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1433 msgbufenabled = 0; 1434 return (ENXIO); 1435 } 1436 1437 if (where == NULL) { 1438 /* always return full buffer size */ 1439 *sizep = msgbufp->msg_bufs; 1440 return (0); 1441 } 1442 1443 error = 0; 1444 maxlen = min(msgbufp->msg_bufs, maxlen); 1445 1446 /* 1447 * First, copy from the write pointer to the end of 1448 * message buffer. 1449 */ 1450 beg = msgbufp->msg_bufx; 1451 end = msgbufp->msg_bufs; 1452 while (maxlen > 0) { 1453 len = min(end - beg, maxlen); 1454 if (len == 0) 1455 break; 1456 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1457 if (error) 1458 break; 1459 where += len; 1460 maxlen -= len; 1461 1462 /* 1463 * ... then, copy from the beginning of message buffer to 1464 * the write pointer. 1465 */ 1466 beg = 0; 1467 end = msgbufp->msg_bufx; 1468 } 1469 return (error); 1470 } 1471 1472 /* 1473 * try over estimating by 5 procs 1474 */ 1475 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1476 1477 static int 1478 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1479 { 1480 struct eproc eproc; 1481 struct kinfo_proc2 kproc2; 1482 struct kinfo_proc *dp; 1483 struct proc *p; 1484 const struct proclist_desc *pd; 1485 char *where, *dp2; 1486 int type, op, arg; 1487 u_int elem_size, elem_count; 1488 size_t buflen, needed; 1489 int error; 1490 1491 dp = vwhere; 1492 dp2 = where = vwhere; 1493 buflen = where != NULL ? *sizep : 0; 1494 error = 0; 1495 needed = 0; 1496 type = name[0]; 1497 1498 if (type == KERN_PROC) { 1499 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1500 return (EINVAL); 1501 op = name[1]; 1502 if (op != KERN_PROC_ALL) 1503 arg = name[2]; 1504 else 1505 arg = 0; /* Quell compiler warning */ 1506 elem_size = elem_count = 0; /* Ditto */ 1507 } else { 1508 if (namelen != 5) 1509 return (EINVAL); 1510 op = name[1]; 1511 arg = name[2]; 1512 elem_size = name[3]; 1513 elem_count = name[4]; 1514 } 1515 1516 proclist_lock_read(); 1517 1518 pd = proclists; 1519 again: 1520 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1521 /* 1522 * Skip embryonic processes. 1523 */ 1524 if (p->p_stat == SIDL) 1525 continue; 1526 /* 1527 * TODO - make more efficient (see notes below). 1528 * do by session. 1529 */ 1530 switch (op) { 1531 1532 case KERN_PROC_PID: 1533 /* could do this with just a lookup */ 1534 if (p->p_pid != (pid_t)arg) 1535 continue; 1536 break; 1537 1538 case KERN_PROC_PGRP: 1539 /* could do this by traversing pgrp */ 1540 if (p->p_pgrp->pg_id != (pid_t)arg) 1541 continue; 1542 break; 1543 1544 case KERN_PROC_SESSION: 1545 if (p->p_session->s_sid != (pid_t)arg) 1546 continue; 1547 break; 1548 1549 case KERN_PROC_TTY: 1550 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1551 if ((p->p_flag & P_CONTROLT) == 0 || 1552 p->p_session->s_ttyp == NULL || 1553 p->p_session->s_ttyvp != NULL) 1554 continue; 1555 } else if ((p->p_flag & P_CONTROLT) == 0 || 1556 p->p_session->s_ttyp == NULL) { 1557 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1558 continue; 1559 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1560 continue; 1561 break; 1562 1563 case KERN_PROC_UID: 1564 if (p->p_ucred->cr_uid != (uid_t)arg) 1565 continue; 1566 break; 1567 1568 case KERN_PROC_RUID: 1569 if (p->p_cred->p_ruid != (uid_t)arg) 1570 continue; 1571 break; 1572 1573 case KERN_PROC_GID: 1574 if (p->p_ucred->cr_gid != (uid_t)arg) 1575 continue; 1576 break; 1577 1578 case KERN_PROC_RGID: 1579 if (p->p_cred->p_rgid != (uid_t)arg) 1580 continue; 1581 break; 1582 1583 case KERN_PROC_ALL: 1584 /* allow everything */ 1585 break; 1586 1587 default: 1588 error = EINVAL; 1589 goto cleanup; 1590 } 1591 if (type == KERN_PROC) { 1592 if (buflen >= sizeof(struct kinfo_proc)) { 1593 fill_eproc(p, &eproc); 1594 error = copyout((caddr_t)p, &dp->kp_proc, 1595 sizeof(struct proc)); 1596 if (error) 1597 goto cleanup; 1598 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1599 sizeof(eproc)); 1600 if (error) 1601 goto cleanup; 1602 dp++; 1603 buflen -= sizeof(struct kinfo_proc); 1604 } 1605 needed += sizeof(struct kinfo_proc); 1606 } else { /* KERN_PROC2 */ 1607 if (buflen >= elem_size && elem_count > 0) { 1608 fill_kproc2(p, &kproc2); 1609 /* 1610 * Copy out elem_size, but not larger than 1611 * the size of a struct kinfo_proc2. 1612 */ 1613 error = copyout(&kproc2, dp2, 1614 min(sizeof(kproc2), elem_size)); 1615 if (error) 1616 goto cleanup; 1617 dp2 += elem_size; 1618 buflen -= elem_size; 1619 elem_count--; 1620 } 1621 needed += elem_size; 1622 } 1623 } 1624 pd++; 1625 if (pd->pd_list != NULL) 1626 goto again; 1627 proclist_unlock_read(); 1628 1629 if (where != NULL) { 1630 if (type == KERN_PROC) 1631 *sizep = (caddr_t)dp - where; 1632 else 1633 *sizep = dp2 - where; 1634 if (needed > *sizep) 1635 return (ENOMEM); 1636 } else { 1637 needed += KERN_PROCSLOP; 1638 *sizep = needed; 1639 } 1640 return (0); 1641 cleanup: 1642 proclist_unlock_read(); 1643 return (error); 1644 } 1645 1646 1647 /* 1648 * try over estimating by 5 LWPs 1649 */ 1650 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1651 1652 static int 1653 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1654 { 1655 struct kinfo_lwp klwp; 1656 struct proc *p; 1657 struct lwp *l; 1658 char *where, *dp; 1659 int type, pid, elem_size, elem_count; 1660 int buflen, needed, error; 1661 1662 dp = where = vwhere; 1663 buflen = where != NULL ? *sizep : 0; 1664 error = needed = 0; 1665 type = name[0]; 1666 1667 if (namelen != 4) 1668 return (EINVAL); 1669 pid = name[1]; 1670 elem_size = name[2]; 1671 elem_count = name[3]; 1672 1673 p = pfind(pid); 1674 if (p == NULL) 1675 return (ESRCH); 1676 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1677 if (buflen >= elem_size && elem_count > 0) { 1678 fill_lwp(l, &klwp); 1679 /* 1680 * Copy out elem_size, but not larger than 1681 * the size of a struct kinfo_proc2. 1682 */ 1683 error = copyout(&klwp, dp, 1684 min(sizeof(klwp), elem_size)); 1685 if (error) 1686 goto cleanup; 1687 dp += elem_size; 1688 buflen -= elem_size; 1689 elem_count--; 1690 } 1691 needed += elem_size; 1692 } 1693 1694 if (where != NULL) { 1695 *sizep = dp - where; 1696 if (needed > *sizep) 1697 return (ENOMEM); 1698 } else { 1699 needed += KERN_PROCSLOP; 1700 *sizep = needed; 1701 } 1702 return (0); 1703 cleanup: 1704 return (error); 1705 } 1706 1707 /* 1708 * Fill in an eproc structure for the specified process. 1709 */ 1710 void 1711 fill_eproc(struct proc *p, struct eproc *ep) 1712 { 1713 struct tty *tp; 1714 struct lwp *l; 1715 1716 ep->e_paddr = p; 1717 ep->e_sess = p->p_session; 1718 ep->e_pcred = *p->p_cred; 1719 ep->e_ucred = *p->p_ucred; 1720 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1721 ep->e_vm.vm_rssize = 0; 1722 ep->e_vm.vm_tsize = 0; 1723 ep->e_vm.vm_dsize = 0; 1724 ep->e_vm.vm_ssize = 0; 1725 /* ep->e_vm.vm_pmap = XXX; */ 1726 } else { 1727 struct vmspace *vm = p->p_vmspace; 1728 1729 ep->e_vm.vm_rssize = vm_resident_count(vm); 1730 ep->e_vm.vm_tsize = vm->vm_tsize; 1731 ep->e_vm.vm_dsize = vm->vm_dsize; 1732 ep->e_vm.vm_ssize = vm->vm_ssize; 1733 1734 /* Pick a "representative" LWP */ 1735 l = proc_representative_lwp(p); 1736 1737 if (l->l_wmesg) 1738 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1739 } 1740 if (p->p_pptr) 1741 ep->e_ppid = p->p_pptr->p_pid; 1742 else 1743 ep->e_ppid = 0; 1744 ep->e_pgid = p->p_pgrp->pg_id; 1745 ep->e_sid = ep->e_sess->s_sid; 1746 ep->e_jobc = p->p_pgrp->pg_jobc; 1747 if ((p->p_flag & P_CONTROLT) && 1748 (tp = ep->e_sess->s_ttyp)) { 1749 ep->e_tdev = tp->t_dev; 1750 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1751 ep->e_tsess = tp->t_session; 1752 } else 1753 ep->e_tdev = NODEV; 1754 1755 ep->e_xsize = ep->e_xrssize = 0; 1756 ep->e_xccount = ep->e_xswrss = 0; 1757 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1758 if (SESS_LEADER(p)) 1759 ep->e_flag |= EPROC_SLEADER; 1760 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1761 } 1762 1763 /* 1764 * Fill in an eproc structure for the specified process. 1765 */ 1766 static void 1767 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1768 { 1769 struct tty *tp; 1770 struct lwp *l; 1771 memset(ki, 0, sizeof(*ki)); 1772 1773 ki->p_paddr = PTRTOINT64(p); 1774 ki->p_fd = PTRTOINT64(p->p_fd); 1775 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1776 ki->p_stats = PTRTOINT64(p->p_stats); 1777 ki->p_limit = PTRTOINT64(p->p_limit); 1778 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1779 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1780 ki->p_sess = PTRTOINT64(p->p_session); 1781 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1782 ki->p_ru = PTRTOINT64(p->p_ru); 1783 1784 ki->p_eflag = 0; 1785 ki->p_exitsig = p->p_exitsig; 1786 ki->p_flag = p->p_flag; 1787 1788 ki->p_pid = p->p_pid; 1789 if (p->p_pptr) 1790 ki->p_ppid = p->p_pptr->p_pid; 1791 else 1792 ki->p_ppid = 0; 1793 ki->p_sid = p->p_session->s_sid; 1794 ki->p__pgid = p->p_pgrp->pg_id; 1795 1796 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1797 1798 ki->p_uid = p->p_ucred->cr_uid; 1799 ki->p_ruid = p->p_cred->p_ruid; 1800 ki->p_gid = p->p_ucred->cr_gid; 1801 ki->p_rgid = p->p_cred->p_rgid; 1802 1803 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1804 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1805 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1806 1807 ki->p_jobc = p->p_pgrp->pg_jobc; 1808 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1809 ki->p_tdev = tp->t_dev; 1810 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1811 ki->p_tsess = PTRTOINT64(tp->t_session); 1812 } else { 1813 ki->p_tdev = NODEV; 1814 } 1815 1816 ki->p_estcpu = p->p_estcpu; 1817 ki->p_rtime_sec = p->p_rtime.tv_sec; 1818 ki->p_rtime_usec = p->p_rtime.tv_usec; 1819 ki->p_cpticks = p->p_cpticks; 1820 ki->p_pctcpu = p->p_pctcpu; 1821 1822 ki->p_uticks = p->p_uticks; 1823 ki->p_sticks = p->p_sticks; 1824 ki->p_iticks = p->p_iticks; 1825 1826 ki->p_tracep = PTRTOINT64(p->p_tracep); 1827 ki->p_traceflag = p->p_traceflag; 1828 1829 1830 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1831 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1832 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1833 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1834 1835 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1836 ki->p_realstat = p->p_stat; 1837 ki->p_nice = p->p_nice; 1838 1839 ki->p_xstat = p->p_xstat; 1840 ki->p_acflag = p->p_acflag; 1841 1842 strncpy(ki->p_comm, p->p_comm, 1843 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1844 1845 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1846 1847 ki->p_nlwps = p->p_nlwps; 1848 ki->p_nrlwps = p->p_nrlwps; 1849 ki->p_realflag = p->p_flag; 1850 1851 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1852 ki->p_vm_rssize = 0; 1853 ki->p_vm_tsize = 0; 1854 ki->p_vm_dsize = 0; 1855 ki->p_vm_ssize = 0; 1856 l = NULL; 1857 } else { 1858 struct vmspace *vm = p->p_vmspace; 1859 1860 ki->p_vm_rssize = vm_resident_count(vm); 1861 ki->p_vm_tsize = vm->vm_tsize; 1862 ki->p_vm_dsize = vm->vm_dsize; 1863 ki->p_vm_ssize = vm->vm_ssize; 1864 1865 /* Pick a "representative" LWP */ 1866 l = proc_representative_lwp(p); 1867 ki->p_forw = PTRTOINT64(l->l_forw); 1868 ki->p_back = PTRTOINT64(l->l_back); 1869 ki->p_addr = PTRTOINT64(l->l_addr); 1870 ki->p_stat = l->l_stat; 1871 ki->p_flag |= l->l_flag; 1872 ki->p_swtime = l->l_swtime; 1873 ki->p_slptime = l->l_slptime; 1874 if (l->l_stat == LSONPROC) { 1875 KDASSERT(l->l_cpu != NULL); 1876 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1877 } else 1878 ki->p_schedflags = 0; 1879 ki->p_holdcnt = l->l_holdcnt; 1880 ki->p_priority = l->l_priority; 1881 ki->p_usrpri = l->l_usrpri; 1882 if (l->l_wmesg) 1883 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1884 ki->p_wchan = PTRTOINT64(l->l_wchan); 1885 1886 } 1887 1888 if (p->p_session->s_ttyvp) 1889 ki->p_eflag |= EPROC_CTTY; 1890 if (SESS_LEADER(p)) 1891 ki->p_eflag |= EPROC_SLEADER; 1892 1893 /* XXX Is this double check necessary? */ 1894 if (P_ZOMBIE(p)) { 1895 ki->p_uvalid = 0; 1896 } else { 1897 ki->p_uvalid = 1; 1898 1899 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1900 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1901 1902 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1903 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1904 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1905 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1906 1907 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1908 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1909 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1910 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1911 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1912 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1913 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1914 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1915 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1916 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1917 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1918 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1919 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1920 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1921 1922 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1923 p->p_stats->p_cru.ru_stime.tv_sec; 1924 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1925 p->p_stats->p_cru.ru_stime.tv_usec; 1926 } 1927 #ifdef MULTIPROCESSOR 1928 if (l && l->l_cpu != NULL) 1929 ki->p_cpuid = l->l_cpu->ci_cpuid; 1930 else 1931 #endif 1932 ki->p_cpuid = KI_NOCPU; 1933 1934 } 1935 1936 /* 1937 * Fill in a kinfo_lwp structure for the specified lwp. 1938 */ 1939 static void 1940 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1941 { 1942 kl->l_forw = PTRTOINT64(l->l_forw); 1943 kl->l_back = PTRTOINT64(l->l_back); 1944 kl->l_laddr = PTRTOINT64(l); 1945 kl->l_addr = PTRTOINT64(l->l_addr); 1946 kl->l_stat = l->l_stat; 1947 kl->l_lid = l->l_lid; 1948 kl->l_flag = l->l_flag; 1949 1950 kl->l_swtime = l->l_swtime; 1951 kl->l_slptime = l->l_slptime; 1952 if (l->l_stat == LSONPROC) { 1953 KDASSERT(l->l_cpu != NULL); 1954 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1955 } else 1956 kl->l_schedflags = 0; 1957 kl->l_holdcnt = l->l_holdcnt; 1958 kl->l_priority = l->l_priority; 1959 kl->l_usrpri = l->l_usrpri; 1960 if (l->l_wmesg) 1961 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1962 kl->l_wchan = PTRTOINT64(l->l_wchan); 1963 #ifdef MULTIPROCESSOR 1964 if (l->l_cpu != NULL) 1965 kl->l_cpuid = l->l_cpu->ci_cpuid; 1966 else 1967 #endif 1968 kl->l_cpuid = KI_NOCPU; 1969 } 1970 1971 int 1972 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1973 struct proc *up) 1974 { 1975 struct ps_strings pss; 1976 struct proc *p; 1977 size_t len, upper_bound, xlen, i; 1978 struct uio auio; 1979 struct iovec aiov; 1980 vaddr_t argv; 1981 pid_t pid; 1982 int nargv, type, error; 1983 char *arg; 1984 char *tmp; 1985 1986 if (namelen != 2) 1987 return (EINVAL); 1988 pid = name[0]; 1989 type = name[1]; 1990 1991 switch (type) { 1992 case KERN_PROC_ARGV: 1993 case KERN_PROC_NARGV: 1994 case KERN_PROC_ENV: 1995 case KERN_PROC_NENV: 1996 /* ok */ 1997 break; 1998 default: 1999 return (EINVAL); 2000 } 2001 2002 /* check pid */ 2003 if ((p = pfind(pid)) == NULL) 2004 return (EINVAL); 2005 2006 /* only root or same user change look at the environment */ 2007 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 2008 if (up->p_ucred->cr_uid != 0) { 2009 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 2010 up->p_cred->p_ruid != p->p_cred->p_svuid) 2011 return (EPERM); 2012 } 2013 } 2014 2015 if (sizep != NULL && where == NULL) { 2016 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 2017 *sizep = sizeof (int); 2018 else 2019 *sizep = ARG_MAX; /* XXX XXX XXX */ 2020 return (0); 2021 } 2022 if (where == NULL || sizep == NULL) 2023 return (EINVAL); 2024 2025 /* 2026 * Zombies don't have a stack, so we can't read their psstrings. 2027 * System processes also don't have a user stack. 2028 */ 2029 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 2030 return (EINVAL); 2031 2032 /* 2033 * Lock the process down in memory. 2034 */ 2035 /* XXXCDC: how should locking work here? */ 2036 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 2037 return (EFAULT); 2038 2039 p->p_vmspace->vm_refcnt++; /* XXX */ 2040 2041 /* 2042 * Allocate a temporary buffer to hold the arguments. 2043 */ 2044 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2045 2046 /* 2047 * Read in the ps_strings structure. 2048 */ 2049 aiov.iov_base = &pss; 2050 aiov.iov_len = sizeof(pss); 2051 auio.uio_iov = &aiov; 2052 auio.uio_iovcnt = 1; 2053 auio.uio_offset = (vaddr_t)p->p_psstr; 2054 auio.uio_resid = sizeof(pss); 2055 auio.uio_segflg = UIO_SYSSPACE; 2056 auio.uio_rw = UIO_READ; 2057 auio.uio_procp = NULL; 2058 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2059 if (error) 2060 goto done; 2061 2062 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2063 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2064 else 2065 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2066 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2067 error = copyout(&nargv, where, sizeof(nargv)); 2068 *sizep = sizeof(nargv); 2069 goto done; 2070 } 2071 /* 2072 * Now read the address of the argument vector. 2073 */ 2074 switch (type) { 2075 case KERN_PROC_ARGV: 2076 /* XXX compat32 stuff here */ 2077 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2078 break; 2079 case KERN_PROC_ENV: 2080 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2081 break; 2082 default: 2083 return (EINVAL); 2084 } 2085 auio.uio_offset = (off_t)(long)tmp; 2086 aiov.iov_base = &argv; 2087 aiov.iov_len = sizeof(argv); 2088 auio.uio_iov = &aiov; 2089 auio.uio_iovcnt = 1; 2090 auio.uio_resid = sizeof(argv); 2091 auio.uio_segflg = UIO_SYSSPACE; 2092 auio.uio_rw = UIO_READ; 2093 auio.uio_procp = NULL; 2094 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2095 if (error) 2096 goto done; 2097 2098 /* 2099 * Now copy in the actual argument vector, one page at a time, 2100 * since we don't know how long the vector is (though, we do 2101 * know how many NUL-terminated strings are in the vector). 2102 */ 2103 len = 0; 2104 upper_bound = *sizep; 2105 for (; nargv != 0 && len < upper_bound; len += xlen) { 2106 aiov.iov_base = arg; 2107 aiov.iov_len = PAGE_SIZE; 2108 auio.uio_iov = &aiov; 2109 auio.uio_iovcnt = 1; 2110 auio.uio_offset = argv + len; 2111 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2112 auio.uio_resid = xlen; 2113 auio.uio_segflg = UIO_SYSSPACE; 2114 auio.uio_rw = UIO_READ; 2115 auio.uio_procp = NULL; 2116 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2117 if (error) 2118 goto done; 2119 2120 for (i = 0; i < xlen && nargv != 0; i++) { 2121 if (arg[i] == '\0') 2122 nargv--; /* one full string */ 2123 } 2124 2125 /* 2126 * Make sure we don't copyout past the end of the user's 2127 * buffer. 2128 */ 2129 if (len + i > upper_bound) 2130 i = upper_bound - len; 2131 2132 error = copyout(arg, (char *)where + len, i); 2133 if (error) 2134 break; 2135 2136 if (nargv == 0) { 2137 len += i; 2138 break; 2139 } 2140 } 2141 *sizep = len; 2142 2143 done: 2144 uvmspace_free(p->p_vmspace); 2145 2146 free(arg, M_TEMP); 2147 return (error); 2148 } 2149 2150 #if NPTY > 0 2151 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2152 2153 /* 2154 * Validate parameters and get old / set new parameters 2155 * for pty sysctl function. 2156 */ 2157 static int 2158 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2159 { 2160 int error = 0; 2161 int oldmax = 0, newmax = 0; 2162 2163 /* get current value of maxptys */ 2164 oldmax = pty_maxptys(0, 0); 2165 2166 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2167 2168 if (!error && newp) { 2169 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2170 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2171 2172 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2173 return (EINVAL); 2174 2175 } 2176 2177 return (error); 2178 } 2179 #endif /* NPTY > 0 */ 2180 2181 static int 2182 sysctl_dotkstat(name, namelen, where, sizep, newp) 2183 int *name; 2184 u_int namelen; 2185 void *where; 2186 size_t *sizep; 2187 void *newp; 2188 { 2189 /* all sysctl names at this level are terminal */ 2190 if (namelen != 1) 2191 return (ENOTDIR); /* overloaded */ 2192 2193 switch (name[0]) { 2194 case KERN_TKSTAT_NIN: 2195 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2196 case KERN_TKSTAT_NOUT: 2197 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2198 case KERN_TKSTAT_CANCC: 2199 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2200 case KERN_TKSTAT_RAWCC: 2201 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2202 default: 2203 return (EOPNOTSUPP); 2204 } 2205 } 2206
Indexes created Sat Sep 20 22:09:52 GMT 2025