kern_sysctl.c revision 1.127
1 /* $NetBSD: kern_sysctl.c,v 1.127 2003/02/27 01:39:56 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 1.127 2003/02/27 01:39:56 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 extern int dumponpanic; 285 286 #ifndef MULTIPROCESSOR 287 #define sysctl_ncpus() 1 288 #endif 289 290 #ifdef MULTIPROCESSOR 291 292 #ifndef CPU_INFO_FOREACH 293 #define CPU_INFO_ITERATOR int 294 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 295 #endif 296 297 static int 298 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 299 { 300 u_int64_t cp_time[CPUSTATES]; 301 int i; 302 struct cpu_info *ci; 303 CPU_INFO_ITERATOR cii; 304 305 for (i = 0; i < CPUSTATES; i++) 306 cp_time[i] = 0; 307 308 for (CPU_INFO_FOREACH(cii, ci)) { 309 for (i = 0; i < CPUSTATES; i++) 310 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 311 } 312 return (sysctl_rdstruct(oldp, oldlenp, newp, 313 cp_time, sizeof(cp_time))); 314 } 315 316 static int 317 sysctl_ncpus(void) 318 { 319 struct cpu_info *ci; 320 CPU_INFO_ITERATOR cii; 321 322 int ncpus = 0; 323 for (CPU_INFO_FOREACH(cii, ci)) 324 ncpus++; 325 return ncpus; 326 } 327 328 #endif 329 330 /* 331 * kernel related system variables. 332 */ 333 int 334 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 335 void *newp, size_t newlen, struct proc *p) 336 { 337 int error, level, inthostid; 338 int old_autonicetime; 339 int old_vnodes; 340 dev_t consdev; 341 #if NRND > 0 342 int v; 343 #endif 344 345 /* All sysctl names at this level, except for a few, are terminal. */ 346 switch (name[0]) { 347 case KERN_PROC: 348 case KERN_PROC2: 349 case KERN_LWP: 350 case KERN_PROF: 351 case KERN_MBUF: 352 case KERN_PROC_ARGS: 353 case KERN_SYSVIPC_INFO: 354 case KERN_PIPE: 355 case KERN_TKSTAT: 356 /* Not terminal. */ 357 break; 358 default: 359 if (namelen != 1) 360 return (ENOTDIR); /* overloaded */ 361 } 362 363 switch (name[0]) { 364 case KERN_OSTYPE: 365 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 366 case KERN_OSRELEASE: 367 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 368 case KERN_OSREV: 369 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 370 case KERN_VERSION: 371 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 372 case KERN_MAXVNODES: 373 old_vnodes = desiredvnodes; 374 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 375 if (newp && !error) { 376 if (old_vnodes > desiredvnodes) { 377 desiredvnodes = old_vnodes; 378 return (EINVAL); 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 - PID_SKIP) 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_MSGBUFSIZE: 495 /* 496 * deal with cases where the message buffer has 497 * become corrupted. 498 */ 499 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 500 msgbufenabled = 0; 501 return (ENXIO); 502 } 503 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 504 case KERN_FSYNC: 505 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 506 case KERN_SYSVMSG: 507 #ifdef SYSVMSG 508 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 509 #else 510 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 511 #endif 512 case KERN_SYSVSEM: 513 #ifdef SYSVSEM 514 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 515 #else 516 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 517 #endif 518 case KERN_SYSVSHM: 519 #ifdef SYSVSHM 520 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 521 #else 522 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 523 #endif 524 case KERN_DEFCORENAME: 525 if (newp && newlen < 1) 526 return (EINVAL); 527 error = sysctl_string(oldp, oldlenp, newp, newlen, 528 defcorename, sizeof(defcorename)); 529 if (newp && !error) 530 defcorenamelen = newlen; 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_SBMAX: 589 { 590 int new_sbmax = sb_max; 591 592 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 593 if (newp && !error) { 594 if (new_sbmax < (16 * 1024)) /* sanity */ 595 return (EINVAL); 596 sb_max = new_sbmax; 597 } 598 return (error); 599 } 600 case KERN_TKSTAT: 601 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 602 newp)); 603 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 604 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 605 case KERN_URND: 606 #if NRND > 0 607 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 608 sizeof(v)) 609 return (sysctl_rdint(oldp, oldlenp, newp, v)); 610 else 611 return (EIO); /*XXX*/ 612 #else 613 return (EOPNOTSUPP); 614 #endif 615 case KERN_LABELSECTOR: 616 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 617 case KERN_LABELOFFSET: 618 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 619 case KERN_FORKFSLEEP: 620 { 621 /* userland sees value in ms, internally is in ticks */ 622 int timo, lsleep = forkfsleep * 1000 / hz; 623 624 error = (sysctl_int(oldp, oldlenp, newp, newlen, &lsleep)); 625 if (newp && !error) { 626 /* refuse negative values, and overly 'long time' */ 627 if (lsleep < 0 || lsleep > MAXSLP * 1000) 628 return (EINVAL); 629 630 timo = mstohz(lsleep); 631 632 /* if the interval is >0 ms && <1 tick, use 1 tick */ 633 if (lsleep != 0 && timo == 0) 634 forkfsleep = 1; 635 else 636 forkfsleep = timo; 637 } 638 return (error); 639 } 640 case KERN_POSIX_THREADS: /* XXX _POSIX_VERSION */ 641 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 642 case KERN_POSIX_SEMAPHORES: /* XXX _POSIX_VERSION */ 643 #ifdef P1003_1B_SEMAPHORE 644 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 645 #else 646 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 647 #endif 648 case KERN_POSIX_BARRIERS: /* XXX _POSIX_VERSION */ 649 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 650 case KERN_POSIX_TIMERS: /* XXX _POSIX_VERSION */ 651 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 652 case KERN_POSIX_SPIN_LOCKS: /* XXX _POSIX_VERSION */ 653 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 654 case KERN_POSIX_READER_WRITER_LOCKS: /* XXX _POSIX_VERSION */ 655 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 656 case KERN_DUMP_ON_PANIC: 657 return (sysctl_int(oldp, oldlenp, newp, newlen, &dumponpanic)); 658 659 default: 660 return (EOPNOTSUPP); 661 } 662 /* NOTREACHED */ 663 } 664 665 /* 666 * hardware related system variables. 667 */ 668 int 669 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 670 void *newp, size_t newlen, struct proc *p) 671 { 672 673 /* All sysctl names at this level, except for a few, are terminal. */ 674 switch (name[0]) { 675 case HW_DISKSTATS: 676 /* Not terminal. */ 677 break; 678 default: 679 if (namelen != 1) 680 return (ENOTDIR); /* overloaded */ 681 } 682 683 switch (name[0]) { 684 case HW_MACHINE: 685 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 686 case HW_MACHINE_ARCH: 687 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 688 case HW_MODEL: 689 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 690 case HW_NCPU: 691 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 692 case HW_BYTEORDER: 693 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 694 case HW_PHYSMEM: 695 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 696 case HW_PHYSPAGES: 697 return (sysctl_rdquad(oldp, oldlenp, newp, physmem)); 698 case HW_USERMEM: 699 return (sysctl_rdint(oldp, oldlenp, newp, 700 ctob(physmem - uvmexp.wired))); 701 case HW_USERPAGES: 702 return (sysctl_rdquad(oldp, oldlenp, newp, 703 physmem - uvmexp.wired)); 704 case HW_PAGESIZE: 705 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 706 case HW_ALIGNBYTES: 707 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 708 case HW_DISKNAMES: 709 return (sysctl_disknames(oldp, oldlenp)); 710 case HW_DISKSTATS: 711 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 712 case HW_CNMAGIC: { 713 char magic[CNS_LEN]; 714 int error; 715 716 if (oldp) 717 cn_get_magic(magic, CNS_LEN); 718 error = sysctl_string(oldp, oldlenp, newp, newlen, 719 magic, sizeof(magic)); 720 if (newp && !error) { 721 error = cn_set_magic(magic); 722 } 723 return (error); 724 } 725 default: 726 return (EOPNOTSUPP); 727 } 728 /* NOTREACHED */ 729 } 730 731 #ifdef DEBUG 732 /* 733 * Debugging related system variables. 734 */ 735 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 736 struct ctldebug debug5, debug6, debug7, debug8, debug9; 737 struct ctldebug debug10, debug11, debug12, debug13, debug14; 738 struct ctldebug debug15, debug16, debug17, debug18, debug19; 739 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 740 &debug0, &debug1, &debug2, &debug3, &debug4, 741 &debug5, &debug6, &debug7, &debug8, &debug9, 742 &debug10, &debug11, &debug12, &debug13, &debug14, 743 &debug15, &debug16, &debug17, &debug18, &debug19, 744 }; 745 746 int 747 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 748 void *newp, size_t newlen, struct proc *p) 749 { 750 struct ctldebug *cdp; 751 752 /* all sysctl names at this level are name and field */ 753 if (namelen != 2) 754 return (ENOTDIR); /* overloaded */ 755 if (name[0] >= CTL_DEBUG_MAXID) 756 return (EOPNOTSUPP); 757 cdp = debugvars[name[0]]; 758 if (cdp->debugname == 0) 759 return (EOPNOTSUPP); 760 switch (name[1]) { 761 case CTL_DEBUG_NAME: 762 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 763 case CTL_DEBUG_VALUE: 764 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 765 default: 766 return (EOPNOTSUPP); 767 } 768 /* NOTREACHED */ 769 } 770 #endif /* DEBUG */ 771 772 int 773 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 774 void *newp, size_t newlen, struct proc *p) 775 { 776 struct proc *ptmp = NULL; 777 const struct proclist_desc *pd; 778 int error = 0; 779 struct rlimit alim; 780 struct plimit *newplim; 781 char *tmps = NULL; 782 size_t len, curlen; 783 u_int i; 784 785 if (namelen < 2) 786 return EINVAL; 787 788 if (name[0] == PROC_CURPROC) { 789 ptmp = p; 790 } else { 791 proclist_lock_read(); 792 for (pd = proclists; pd->pd_list != NULL; pd++) { 793 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 794 ptmp = LIST_NEXT(ptmp, p_list)) { 795 /* Skip embryonic processes. */ 796 if (ptmp->p_stat == SIDL) 797 continue; 798 if (ptmp->p_pid == (pid_t)name[0]) 799 break; 800 } 801 if (ptmp != NULL) 802 break; 803 } 804 proclist_unlock_read(); 805 if (ptmp == NULL) 806 return(ESRCH); 807 if (p->p_ucred->cr_uid != 0) { 808 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 809 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 810 return EPERM; 811 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 812 return EPERM; /* sgid proc */ 813 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 814 if (p->p_ucred->cr_groups[i] == 815 ptmp->p_cred->p_rgid) 816 break; 817 } 818 if (i == p->p_ucred->cr_ngroups) 819 return EPERM; 820 } 821 } 822 switch(name[1]) { 823 case PROC_PID_STOPFORK: 824 if (namelen != 2) 825 return EINVAL; 826 i = ((ptmp->p_flag & P_STOPFORK) != 0); 827 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 828 return error; 829 if (i != 0) 830 ptmp->p_flag |= P_STOPFORK; 831 else 832 ptmp->p_flag &= ~P_STOPFORK; 833 return 0; 834 break; 835 836 case PROC_PID_STOPEXEC: 837 if (namelen != 2) 838 return EINVAL; 839 i = ((ptmp->p_flag & P_STOPEXEC) != 0); 840 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 841 return error; 842 if (i != 0) 843 ptmp->p_flag |= P_STOPEXEC; 844 else 845 ptmp->p_flag &= ~P_STOPEXEC; 846 return 0; 847 break; 848 849 case PROC_PID_CORENAME: 850 if (namelen != 2) 851 return EINVAL; 852 /* 853 * Can't use sysctl_string() here because we may malloc a new 854 * area during the process, so we have to do it by hand. 855 */ 856 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 857 if (oldlenp && *oldlenp < curlen) { 858 if (!oldp) 859 *oldlenp = curlen; 860 return (ENOMEM); 861 } 862 if (newp) { 863 if (securelevel > 2) 864 return EPERM; 865 if (newlen > MAXPATHLEN) 866 return ENAMETOOLONG; 867 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 868 if (tmps == NULL) 869 return ENOMEM; 870 error = copyin(newp, tmps, newlen + 1); 871 tmps[newlen] = '\0'; 872 if (error) 873 goto cleanup; 874 /* Enforce to be either 'core' for end with '.core' */ 875 if (newlen < 4) { /* c.o.r.e */ 876 error = EINVAL; 877 goto cleanup; 878 } 879 len = newlen - 4; 880 if (len > 0) { 881 if (tmps[len - 1] != '.' && 882 tmps[len - 1] != '/') { 883 error = EINVAL; 884 goto cleanup; 885 } 886 } 887 if (strcmp(&tmps[len], "core") != 0) { 888 error = EINVAL; 889 goto cleanup; 890 } 891 } 892 if (oldp && oldlenp) { 893 *oldlenp = curlen; 894 error = copyout(ptmp->p_limit->pl_corename, oldp, 895 curlen); 896 } 897 if (newp && error == 0) { 898 /* if the 2 strings are identical, don't limcopy() */ 899 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 900 error = 0; 901 goto cleanup; 902 } 903 if (ptmp->p_limit->p_refcnt > 1 && 904 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 905 newplim = limcopy(ptmp->p_limit); 906 limfree(ptmp->p_limit); 907 ptmp->p_limit = newplim; 908 } 909 if (ptmp->p_limit->pl_corename != defcorename) { 910 free(ptmp->p_limit->pl_corename, M_TEMP); 911 } 912 ptmp->p_limit->pl_corename = tmps; 913 return (0); 914 } 915 cleanup: 916 if (tmps) 917 free(tmps, M_TEMP); 918 return (error); 919 break; 920 921 case PROC_PID_LIMIT: 922 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 923 return EINVAL; 924 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 925 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 926 error = sysctl_quad(oldp, oldlenp, newp, newlen, 927 &alim.rlim_max); 928 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 929 error = sysctl_quad(oldp, oldlenp, newp, newlen, 930 &alim.rlim_cur); 931 else 932 error = EINVAL; 933 934 if (error) 935 return error; 936 937 if (newp) 938 error = dosetrlimit(ptmp, p->p_cred, 939 name[2] - 1, &alim); 940 return error; 941 break; 942 943 default: 944 return (EINVAL); 945 break; 946 } 947 /* NOTREACHED */ 948 return (EINVAL); 949 } 950 951 int 952 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 953 void *newp, size_t newlen, struct proc *p) 954 { 955 static struct { 956 const char *name; 957 int type; 958 } emulations[] = CTL_EMUL_NAMES; 959 const struct emul *e; 960 const char *ename; 961 #ifdef LKM 962 extern struct lock exec_lock; /* XXX */ 963 int error; 964 #else 965 extern int nexecs_builtin; 966 extern const struct execsw execsw_builtin[]; 967 int i; 968 #endif 969 970 /* all sysctl names at this level are name and field */ 971 if (namelen < 2) 972 return (ENOTDIR); /* overloaded */ 973 974 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 975 return (EOPNOTSUPP); 976 977 ename = emulations[name[0]].name; 978 979 #ifdef LKM 980 lockmgr(&exec_lock, LK_SHARED, NULL); 981 if ((e = emul_search(ename))) { 982 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 983 newp, newlen, p); 984 } else 985 error = EOPNOTSUPP; 986 lockmgr(&exec_lock, LK_RELEASE, NULL); 987 988 return (error); 989 #else 990 for (i = 0; i < nexecs_builtin; i++) { 991 e = execsw_builtin[i].es_emul; 992 /* 993 * In order to match e.g. e->e_name "irix o32" with ename "irix", 994 * we limit the comparison to the length of ename. 995 */ 996 if (e == NULL || strncmp(ename, e->e_name, strlen(ename)) != 0 || 997 e->e_sysctl == NULL) 998 continue; 999 1000 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1001 newp, newlen, p); 1002 } 1003 1004 return (EOPNOTSUPP); 1005 #endif 1006 } 1007 /* 1008 * Convenience macros. 1009 */ 1010 1011 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 1012 if (oldlenp) { \ 1013 if (!oldp) \ 1014 *oldlenp = len; \ 1015 else { \ 1016 if (*oldlenp < len) \ 1017 return(ENOMEM); \ 1018 *oldlenp = len; \ 1019 error = copyout((caddr_t)valp, oldp, len); \ 1020 } \ 1021 } 1022 1023 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 1024 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 1025 1026 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 1027 if (newp && newlen != len) \ 1028 return (EINVAL); 1029 1030 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1031 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1032 1033 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1034 if (error == 0 && newp) \ 1035 error = copyin(newp, valp, len); 1036 1037 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1038 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1039 1040 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1041 if (oldlenp) { \ 1042 len = strlen(str) + 1; \ 1043 if (!oldp) \ 1044 *oldlenp = len; \ 1045 else { \ 1046 if (*oldlenp < len) { \ 1047 err2 = ENOMEM; \ 1048 len = *oldlenp; \ 1049 } else \ 1050 *oldlenp = len; \ 1051 error = copyout(str, oldp, len);\ 1052 if (error == 0) \ 1053 error = err2; \ 1054 } \ 1055 } 1056 1057 /* 1058 * Validate parameters and get old / set new parameters 1059 * for an integer-valued sysctl function. 1060 */ 1061 int 1062 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1063 { 1064 int error = 0; 1065 1066 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1067 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1068 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1069 1070 return (error); 1071 } 1072 1073 1074 /* 1075 * As above, but read-only. 1076 */ 1077 int 1078 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1079 { 1080 int error = 0; 1081 1082 if (newp) 1083 return (EPERM); 1084 1085 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1086 1087 return (error); 1088 } 1089 1090 /* 1091 * Validate parameters and get old / set new parameters 1092 * for an quad-valued sysctl function. 1093 */ 1094 int 1095 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1096 quad_t *valp) 1097 { 1098 int error = 0; 1099 1100 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1101 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1102 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1103 1104 return (error); 1105 } 1106 1107 /* 1108 * As above, but read-only. 1109 */ 1110 int 1111 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1112 { 1113 int error = 0; 1114 1115 if (newp) 1116 return (EPERM); 1117 1118 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1119 1120 return (error); 1121 } 1122 1123 /* 1124 * Validate parameters and get old / set new parameters 1125 * for a string-valued sysctl function. 1126 */ 1127 int 1128 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1129 size_t maxlen) 1130 { 1131 int error = 0, err2 = 0; 1132 size_t len; 1133 1134 if (newp && newlen >= maxlen) 1135 return (EINVAL); 1136 1137 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1138 1139 if (error == 0 && newp) { 1140 error = copyin(newp, str, newlen); 1141 str[newlen] = 0; 1142 } 1143 return (error); 1144 } 1145 1146 /* 1147 * As above, but read-only. 1148 */ 1149 int 1150 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1151 { 1152 int error = 0, err2 = 0; 1153 size_t len; 1154 1155 if (newp) 1156 return (EPERM); 1157 1158 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1159 1160 return (error); 1161 } 1162 1163 /* 1164 * Validate parameters and get old / set new parameters 1165 * for a structure oriented sysctl function. 1166 */ 1167 int 1168 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1169 size_t len) 1170 { 1171 int error = 0; 1172 1173 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1174 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1175 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1176 1177 return (error); 1178 } 1179 1180 /* 1181 * Validate parameters and get old parameters 1182 * for a structure oriented sysctl function. 1183 */ 1184 int 1185 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1186 size_t len) 1187 { 1188 int error = 0; 1189 1190 if (newp) 1191 return (EPERM); 1192 1193 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1194 1195 return (error); 1196 } 1197 1198 /* 1199 * As above, but can return a truncated result. 1200 */ 1201 int 1202 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1203 size_t len) 1204 { 1205 int error = 0; 1206 1207 if (newp) 1208 return (EPERM); 1209 1210 len = min(*oldlenp, len); 1211 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1212 1213 return (error); 1214 } 1215 1216 /* 1217 * Get file structures. 1218 */ 1219 static int 1220 sysctl_file(void *vwhere, size_t *sizep) 1221 { 1222 int error; 1223 size_t buflen; 1224 struct file *fp; 1225 char *start, *where; 1226 1227 start = where = vwhere; 1228 buflen = *sizep; 1229 if (where == NULL) { 1230 /* 1231 * overestimate by 10 files 1232 */ 1233 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1234 return (0); 1235 } 1236 1237 /* 1238 * first copyout filehead 1239 */ 1240 if (buflen < sizeof(filehead)) { 1241 *sizep = 0; 1242 return (0); 1243 } 1244 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1245 if (error) 1246 return (error); 1247 buflen -= sizeof(filehead); 1248 where += sizeof(filehead); 1249 1250 /* 1251 * followed by an array of file structures 1252 */ 1253 LIST_FOREACH(fp, &filehead, f_list) { 1254 if (buflen < sizeof(struct file)) { 1255 *sizep = where - start; 1256 return (ENOMEM); 1257 } 1258 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1259 if (error) 1260 return (error); 1261 buflen -= sizeof(struct file); 1262 where += sizeof(struct file); 1263 } 1264 *sizep = where - start; 1265 return (0); 1266 } 1267 1268 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1269 #define FILL_PERM(src, dst) do { \ 1270 (dst)._key = (src)._key; \ 1271 (dst).uid = (src).uid; \ 1272 (dst).gid = (src).gid; \ 1273 (dst).cuid = (src).cuid; \ 1274 (dst).cgid = (src).cgid; \ 1275 (dst).mode = (src).mode; \ 1276 (dst)._seq = (src)._seq; \ 1277 } while (/*CONSTCOND*/ 0); 1278 #define FILL_MSG(src, dst) do { \ 1279 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1280 (dst).msg_qnum = (src).msg_qnum; \ 1281 (dst).msg_qbytes = (src).msg_qbytes; \ 1282 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1283 (dst).msg_lspid = (src).msg_lspid; \ 1284 (dst).msg_lrpid = (src).msg_lrpid; \ 1285 (dst).msg_stime = (src).msg_stime; \ 1286 (dst).msg_rtime = (src).msg_rtime; \ 1287 (dst).msg_ctime = (src).msg_ctime; \ 1288 } while (/*CONSTCOND*/ 0) 1289 #define FILL_SEM(src, dst) do { \ 1290 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1291 (dst).sem_nsems = (src).sem_nsems; \ 1292 (dst).sem_otime = (src).sem_otime; \ 1293 (dst).sem_ctime = (src).sem_ctime; \ 1294 } while (/*CONSTCOND*/ 0) 1295 #define FILL_SHM(src, dst) do { \ 1296 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1297 (dst).shm_segsz = (src).shm_segsz; \ 1298 (dst).shm_lpid = (src).shm_lpid; \ 1299 (dst).shm_cpid = (src).shm_cpid; \ 1300 (dst).shm_atime = (src).shm_atime; \ 1301 (dst).shm_dtime = (src).shm_dtime; \ 1302 (dst).shm_ctime = (src).shm_ctime; \ 1303 (dst).shm_nattch = (src).shm_nattch; \ 1304 } while (/*CONSTCOND*/ 0) 1305 1306 static int 1307 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1308 { 1309 #ifdef SYSVMSG 1310 struct msg_sysctl_info *msgsi = NULL; 1311 #endif 1312 #ifdef SYSVSEM 1313 struct sem_sysctl_info *semsi = NULL; 1314 #endif 1315 #ifdef SYSVSHM 1316 struct shm_sysctl_info *shmsi = NULL; 1317 #endif 1318 size_t infosize, dssize, tsize, buflen; 1319 void *buf = NULL; 1320 char *start; 1321 int32_t nds; 1322 int i, error, ret; 1323 1324 if (namelen != 1) 1325 return (EINVAL); 1326 1327 start = where; 1328 buflen = *sizep; 1329 1330 switch (*name) { 1331 case KERN_SYSVIPC_MSG_INFO: 1332 #ifdef SYSVMSG 1333 infosize = sizeof(msgsi->msginfo); 1334 nds = msginfo.msgmni; 1335 dssize = sizeof(msgsi->msgids[0]); 1336 break; 1337 #else 1338 return (EINVAL); 1339 #endif 1340 case KERN_SYSVIPC_SEM_INFO: 1341 #ifdef SYSVSEM 1342 infosize = sizeof(semsi->seminfo); 1343 nds = seminfo.semmni; 1344 dssize = sizeof(semsi->semids[0]); 1345 break; 1346 #else 1347 return (EINVAL); 1348 #endif 1349 case KERN_SYSVIPC_SHM_INFO: 1350 #ifdef SYSVSHM 1351 infosize = sizeof(shmsi->shminfo); 1352 nds = shminfo.shmmni; 1353 dssize = sizeof(shmsi->shmids[0]); 1354 break; 1355 #else 1356 return (EINVAL); 1357 #endif 1358 default: 1359 return (EINVAL); 1360 } 1361 /* 1362 * Round infosize to 64 bit boundary if requesting more than just 1363 * the info structure or getting the total data size. 1364 */ 1365 if (where == NULL || *sizep > infosize) 1366 infosize = ((infosize + 7) / 8) * 8; 1367 tsize = infosize + nds * dssize; 1368 1369 /* Return just the total size required. */ 1370 if (where == NULL) { 1371 *sizep = tsize; 1372 return (0); 1373 } 1374 1375 /* Not enough room for even the info struct. */ 1376 if (buflen < infosize) { 1377 *sizep = 0; 1378 return (ENOMEM); 1379 } 1380 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1381 memset(buf, 0, min(tsize, buflen)); 1382 1383 switch (*name) { 1384 #ifdef SYSVMSG 1385 case KERN_SYSVIPC_MSG_INFO: 1386 msgsi = (struct msg_sysctl_info *)buf; 1387 msgsi->msginfo = msginfo; 1388 break; 1389 #endif 1390 #ifdef SYSVSEM 1391 case KERN_SYSVIPC_SEM_INFO: 1392 semsi = (struct sem_sysctl_info *)buf; 1393 semsi->seminfo = seminfo; 1394 break; 1395 #endif 1396 #ifdef SYSVSHM 1397 case KERN_SYSVIPC_SHM_INFO: 1398 shmsi = (struct shm_sysctl_info *)buf; 1399 shmsi->shminfo = shminfo; 1400 break; 1401 #endif 1402 } 1403 buflen -= infosize; 1404 1405 ret = 0; 1406 if (buflen > 0) { 1407 /* Fill in the IPC data structures. */ 1408 for (i = 0; i < nds; i++) { 1409 if (buflen < dssize) { 1410 ret = ENOMEM; 1411 break; 1412 } 1413 switch (*name) { 1414 #ifdef SYSVMSG 1415 case KERN_SYSVIPC_MSG_INFO: 1416 FILL_MSG(msqids[i], msgsi->msgids[i]); 1417 break; 1418 #endif 1419 #ifdef SYSVSEM 1420 case KERN_SYSVIPC_SEM_INFO: 1421 FILL_SEM(sema[i], semsi->semids[i]); 1422 break; 1423 #endif 1424 #ifdef SYSVSHM 1425 case KERN_SYSVIPC_SHM_INFO: 1426 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1427 break; 1428 #endif 1429 } 1430 buflen -= dssize; 1431 } 1432 } 1433 *sizep -= buflen; 1434 error = copyout(buf, start, *sizep); 1435 /* If copyout succeeded, use return code set earlier. */ 1436 if (error == 0) 1437 error = ret; 1438 if (buf) 1439 free(buf, M_TEMP); 1440 return (error); 1441 } 1442 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1443 1444 static int 1445 sysctl_msgbuf(void *vwhere, size_t *sizep) 1446 { 1447 char *where = vwhere; 1448 size_t len, maxlen = *sizep; 1449 long beg, end; 1450 int error; 1451 1452 /* 1453 * deal with cases where the message buffer has 1454 * become corrupted. 1455 */ 1456 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1457 msgbufenabled = 0; 1458 return (ENXIO); 1459 } 1460 1461 if (where == NULL) { 1462 /* always return full buffer size */ 1463 *sizep = msgbufp->msg_bufs; 1464 return (0); 1465 } 1466 1467 error = 0; 1468 maxlen = min(msgbufp->msg_bufs, maxlen); 1469 1470 /* 1471 * First, copy from the write pointer to the end of 1472 * message buffer. 1473 */ 1474 beg = msgbufp->msg_bufx; 1475 end = msgbufp->msg_bufs; 1476 while (maxlen > 0) { 1477 len = min(end - beg, maxlen); 1478 if (len == 0) 1479 break; 1480 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1481 if (error) 1482 break; 1483 where += len; 1484 maxlen -= len; 1485 1486 /* 1487 * ... then, copy from the beginning of message buffer to 1488 * the write pointer. 1489 */ 1490 beg = 0; 1491 end = msgbufp->msg_bufx; 1492 } 1493 return (error); 1494 } 1495 1496 /* 1497 * try over estimating by 5 procs 1498 */ 1499 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1500 1501 static int 1502 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1503 { 1504 struct eproc eproc; 1505 struct kinfo_proc2 kproc2; 1506 struct kinfo_proc *dp; 1507 struct proc *p; 1508 const struct proclist_desc *pd; 1509 char *where, *dp2; 1510 int type, op, arg; 1511 u_int elem_size, elem_count; 1512 size_t buflen, needed; 1513 int error; 1514 1515 dp = vwhere; 1516 dp2 = where = vwhere; 1517 buflen = where != NULL ? *sizep : 0; 1518 error = 0; 1519 needed = 0; 1520 type = name[0]; 1521 1522 if (type == KERN_PROC) { 1523 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1524 return (EINVAL); 1525 op = name[1]; 1526 if (op != KERN_PROC_ALL) 1527 arg = name[2]; 1528 else 1529 arg = 0; /* Quell compiler warning */ 1530 elem_size = elem_count = 0; /* Ditto */ 1531 } else { 1532 if (namelen != 5) 1533 return (EINVAL); 1534 op = name[1]; 1535 arg = name[2]; 1536 elem_size = name[3]; 1537 elem_count = name[4]; 1538 } 1539 1540 proclist_lock_read(); 1541 1542 pd = proclists; 1543 again: 1544 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1545 /* 1546 * Skip embryonic processes. 1547 */ 1548 if (p->p_stat == SIDL) 1549 continue; 1550 /* 1551 * TODO - make more efficient (see notes below). 1552 * do by session. 1553 */ 1554 switch (op) { 1555 1556 case KERN_PROC_PID: 1557 /* could do this with just a lookup */ 1558 if (p->p_pid != (pid_t)arg) 1559 continue; 1560 break; 1561 1562 case KERN_PROC_PGRP: 1563 /* could do this by traversing pgrp */ 1564 if (p->p_pgrp->pg_id != (pid_t)arg) 1565 continue; 1566 break; 1567 1568 case KERN_PROC_SESSION: 1569 if (p->p_session->s_sid != (pid_t)arg) 1570 continue; 1571 break; 1572 1573 case KERN_PROC_TTY: 1574 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1575 if ((p->p_flag & P_CONTROLT) == 0 || 1576 p->p_session->s_ttyp == NULL || 1577 p->p_session->s_ttyvp != NULL) 1578 continue; 1579 } else if ((p->p_flag & P_CONTROLT) == 0 || 1580 p->p_session->s_ttyp == NULL) { 1581 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1582 continue; 1583 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1584 continue; 1585 break; 1586 1587 case KERN_PROC_UID: 1588 if (p->p_ucred->cr_uid != (uid_t)arg) 1589 continue; 1590 break; 1591 1592 case KERN_PROC_RUID: 1593 if (p->p_cred->p_ruid != (uid_t)arg) 1594 continue; 1595 break; 1596 1597 case KERN_PROC_GID: 1598 if (p->p_ucred->cr_gid != (uid_t)arg) 1599 continue; 1600 break; 1601 1602 case KERN_PROC_RGID: 1603 if (p->p_cred->p_rgid != (uid_t)arg) 1604 continue; 1605 break; 1606 1607 case KERN_PROC_ALL: 1608 /* allow everything */ 1609 break; 1610 1611 default: 1612 error = EINVAL; 1613 goto cleanup; 1614 } 1615 if (type == KERN_PROC) { 1616 if (buflen >= sizeof(struct kinfo_proc)) { 1617 fill_eproc(p, &eproc); 1618 error = copyout((caddr_t)p, &dp->kp_proc, 1619 sizeof(struct proc)); 1620 if (error) 1621 goto cleanup; 1622 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1623 sizeof(eproc)); 1624 if (error) 1625 goto cleanup; 1626 dp++; 1627 buflen -= sizeof(struct kinfo_proc); 1628 } 1629 needed += sizeof(struct kinfo_proc); 1630 } else { /* KERN_PROC2 */ 1631 if (buflen >= elem_size && elem_count > 0) { 1632 fill_kproc2(p, &kproc2); 1633 /* 1634 * Copy out elem_size, but not larger than 1635 * the size of a struct kinfo_proc2. 1636 */ 1637 error = copyout(&kproc2, dp2, 1638 min(sizeof(kproc2), elem_size)); 1639 if (error) 1640 goto cleanup; 1641 dp2 += elem_size; 1642 buflen -= elem_size; 1643 elem_count--; 1644 } 1645 needed += elem_size; 1646 } 1647 } 1648 pd++; 1649 if (pd->pd_list != NULL) 1650 goto again; 1651 proclist_unlock_read(); 1652 1653 if (where != NULL) { 1654 if (type == KERN_PROC) 1655 *sizep = (caddr_t)dp - where; 1656 else 1657 *sizep = dp2 - where; 1658 if (needed > *sizep) 1659 return (ENOMEM); 1660 } else { 1661 needed += KERN_PROCSLOP; 1662 *sizep = needed; 1663 } 1664 return (0); 1665 cleanup: 1666 proclist_unlock_read(); 1667 return (error); 1668 } 1669 1670 1671 /* 1672 * try over estimating by 5 LWPs 1673 */ 1674 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1675 1676 static int 1677 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1678 { 1679 struct kinfo_lwp klwp; 1680 struct proc *p; 1681 struct lwp *l; 1682 char *where, *dp; 1683 int type, pid, elem_size, elem_count; 1684 int buflen, needed, error; 1685 1686 dp = where = vwhere; 1687 buflen = where != NULL ? *sizep : 0; 1688 error = needed = 0; 1689 type = name[0]; 1690 1691 if (namelen != 4) 1692 return (EINVAL); 1693 pid = name[1]; 1694 elem_size = name[2]; 1695 elem_count = name[3]; 1696 1697 p = pfind(pid); 1698 if (p == NULL) 1699 return (ESRCH); 1700 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1701 if (buflen >= elem_size && elem_count > 0) { 1702 fill_lwp(l, &klwp); 1703 /* 1704 * Copy out elem_size, but not larger than 1705 * the size of a struct kinfo_proc2. 1706 */ 1707 error = copyout(&klwp, dp, 1708 min(sizeof(klwp), elem_size)); 1709 if (error) 1710 goto cleanup; 1711 dp += elem_size; 1712 buflen -= elem_size; 1713 elem_count--; 1714 } 1715 needed += elem_size; 1716 } 1717 1718 if (where != NULL) { 1719 *sizep = dp - where; 1720 if (needed > *sizep) 1721 return (ENOMEM); 1722 } else { 1723 needed += KERN_PROCSLOP; 1724 *sizep = needed; 1725 } 1726 return (0); 1727 cleanup: 1728 return (error); 1729 } 1730 1731 /* 1732 * Fill in an eproc structure for the specified process. 1733 */ 1734 void 1735 fill_eproc(struct proc *p, struct eproc *ep) 1736 { 1737 struct tty *tp; 1738 struct lwp *l; 1739 1740 ep->e_paddr = p; 1741 ep->e_sess = p->p_session; 1742 ep->e_pcred = *p->p_cred; 1743 ep->e_ucred = *p->p_ucred; 1744 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1745 ep->e_vm.vm_rssize = 0; 1746 ep->e_vm.vm_tsize = 0; 1747 ep->e_vm.vm_dsize = 0; 1748 ep->e_vm.vm_ssize = 0; 1749 /* ep->e_vm.vm_pmap = XXX; */ 1750 } else { 1751 struct vmspace *vm = p->p_vmspace; 1752 1753 ep->e_vm.vm_rssize = vm_resident_count(vm); 1754 ep->e_vm.vm_tsize = vm->vm_tsize; 1755 ep->e_vm.vm_dsize = vm->vm_dsize; 1756 ep->e_vm.vm_ssize = vm->vm_ssize; 1757 1758 /* Pick a "representative" LWP */ 1759 l = proc_representative_lwp(p); 1760 1761 if (l->l_wmesg) 1762 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1763 } 1764 if (p->p_pptr) 1765 ep->e_ppid = p->p_pptr->p_pid; 1766 else 1767 ep->e_ppid = 0; 1768 ep->e_pgid = p->p_pgrp->pg_id; 1769 ep->e_sid = ep->e_sess->s_sid; 1770 ep->e_jobc = p->p_pgrp->pg_jobc; 1771 if ((p->p_flag & P_CONTROLT) && 1772 (tp = ep->e_sess->s_ttyp)) { 1773 ep->e_tdev = tp->t_dev; 1774 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1775 ep->e_tsess = tp->t_session; 1776 } else 1777 ep->e_tdev = NODEV; 1778 1779 ep->e_xsize = ep->e_xrssize = 0; 1780 ep->e_xccount = ep->e_xswrss = 0; 1781 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1782 if (SESS_LEADER(p)) 1783 ep->e_flag |= EPROC_SLEADER; 1784 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1785 } 1786 1787 /* 1788 * Fill in an eproc structure for the specified process. 1789 */ 1790 static void 1791 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1792 { 1793 struct tty *tp; 1794 struct lwp *l; 1795 memset(ki, 0, sizeof(*ki)); 1796 1797 ki->p_paddr = PTRTOINT64(p); 1798 ki->p_fd = PTRTOINT64(p->p_fd); 1799 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1800 ki->p_stats = PTRTOINT64(p->p_stats); 1801 ki->p_limit = PTRTOINT64(p->p_limit); 1802 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1803 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1804 ki->p_sess = PTRTOINT64(p->p_session); 1805 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1806 ki->p_ru = PTRTOINT64(p->p_ru); 1807 1808 ki->p_eflag = 0; 1809 ki->p_exitsig = p->p_exitsig; 1810 ki->p_flag = p->p_flag; 1811 1812 ki->p_pid = p->p_pid; 1813 if (p->p_pptr) 1814 ki->p_ppid = p->p_pptr->p_pid; 1815 else 1816 ki->p_ppid = 0; 1817 ki->p_sid = p->p_session->s_sid; 1818 ki->p__pgid = p->p_pgrp->pg_id; 1819 1820 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1821 1822 ki->p_uid = p->p_ucred->cr_uid; 1823 ki->p_ruid = p->p_cred->p_ruid; 1824 ki->p_gid = p->p_ucred->cr_gid; 1825 ki->p_rgid = p->p_cred->p_rgid; 1826 1827 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1828 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1829 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1830 1831 ki->p_jobc = p->p_pgrp->pg_jobc; 1832 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1833 ki->p_tdev = tp->t_dev; 1834 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1835 ki->p_tsess = PTRTOINT64(tp->t_session); 1836 } else { 1837 ki->p_tdev = NODEV; 1838 } 1839 1840 ki->p_estcpu = p->p_estcpu; 1841 ki->p_rtime_sec = p->p_rtime.tv_sec; 1842 ki->p_rtime_usec = p->p_rtime.tv_usec; 1843 ki->p_cpticks = p->p_cpticks; 1844 ki->p_pctcpu = p->p_pctcpu; 1845 1846 ki->p_uticks = p->p_uticks; 1847 ki->p_sticks = p->p_sticks; 1848 ki->p_iticks = p->p_iticks; 1849 1850 ki->p_tracep = PTRTOINT64(p->p_tracep); 1851 ki->p_traceflag = p->p_traceflag; 1852 1853 1854 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1855 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1856 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1857 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1858 1859 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1860 ki->p_realstat = p->p_stat; 1861 ki->p_nice = p->p_nice; 1862 1863 ki->p_xstat = p->p_xstat; 1864 ki->p_acflag = p->p_acflag; 1865 1866 strncpy(ki->p_comm, p->p_comm, 1867 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1868 1869 strncpy(ki->p_login, p->p_session->s_login, 1870 min(sizeof ki->p_login - 1, sizeof p->p_session->s_login)); 1871 1872 ki->p_nlwps = p->p_nlwps; 1873 ki->p_nrlwps = p->p_nrlwps; 1874 ki->p_realflag = p->p_flag; 1875 1876 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1877 ki->p_vm_rssize = 0; 1878 ki->p_vm_tsize = 0; 1879 ki->p_vm_dsize = 0; 1880 ki->p_vm_ssize = 0; 1881 l = NULL; 1882 } else { 1883 struct vmspace *vm = p->p_vmspace; 1884 1885 ki->p_vm_rssize = vm_resident_count(vm); 1886 ki->p_vm_tsize = vm->vm_tsize; 1887 ki->p_vm_dsize = vm->vm_dsize; 1888 ki->p_vm_ssize = vm->vm_ssize; 1889 1890 /* Pick a "representative" LWP */ 1891 l = proc_representative_lwp(p); 1892 ki->p_forw = PTRTOINT64(l->l_forw); 1893 ki->p_back = PTRTOINT64(l->l_back); 1894 ki->p_addr = PTRTOINT64(l->l_addr); 1895 ki->p_stat = l->l_stat; 1896 ki->p_flag |= l->l_flag; 1897 ki->p_swtime = l->l_swtime; 1898 ki->p_slptime = l->l_slptime; 1899 if (l->l_stat == LSONPROC) { 1900 KDASSERT(l->l_cpu != NULL); 1901 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1902 } else 1903 ki->p_schedflags = 0; 1904 ki->p_holdcnt = l->l_holdcnt; 1905 ki->p_priority = l->l_priority; 1906 ki->p_usrpri = l->l_usrpri; 1907 if (l->l_wmesg) 1908 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1909 ki->p_wchan = PTRTOINT64(l->l_wchan); 1910 1911 } 1912 1913 if (p->p_session->s_ttyvp) 1914 ki->p_eflag |= EPROC_CTTY; 1915 if (SESS_LEADER(p)) 1916 ki->p_eflag |= EPROC_SLEADER; 1917 1918 /* XXX Is this double check necessary? */ 1919 if (P_ZOMBIE(p)) { 1920 ki->p_uvalid = 0; 1921 } else { 1922 ki->p_uvalid = 1; 1923 1924 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1925 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1926 1927 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1928 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1929 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1930 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1931 1932 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1933 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1934 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1935 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1936 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1937 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1938 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1939 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1940 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1941 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1942 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1943 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1944 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1945 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1946 1947 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1948 p->p_stats->p_cru.ru_stime.tv_sec; 1949 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1950 p->p_stats->p_cru.ru_stime.tv_usec; 1951 } 1952 #ifdef MULTIPROCESSOR 1953 if (l && l->l_cpu != NULL) 1954 ki->p_cpuid = l->l_cpu->ci_cpuid; 1955 else 1956 #endif 1957 ki->p_cpuid = KI_NOCPU; 1958 1959 } 1960 1961 /* 1962 * Fill in a kinfo_lwp structure for the specified lwp. 1963 */ 1964 static void 1965 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1966 { 1967 kl->l_forw = PTRTOINT64(l->l_forw); 1968 kl->l_back = PTRTOINT64(l->l_back); 1969 kl->l_laddr = PTRTOINT64(l); 1970 kl->l_addr = PTRTOINT64(l->l_addr); 1971 kl->l_stat = l->l_stat; 1972 kl->l_lid = l->l_lid; 1973 kl->l_flag = l->l_flag; 1974 1975 kl->l_swtime = l->l_swtime; 1976 kl->l_slptime = l->l_slptime; 1977 if (l->l_stat == LSONPROC) { 1978 KDASSERT(l->l_cpu != NULL); 1979 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1980 } else 1981 kl->l_schedflags = 0; 1982 kl->l_holdcnt = l->l_holdcnt; 1983 kl->l_priority = l->l_priority; 1984 kl->l_usrpri = l->l_usrpri; 1985 if (l->l_wmesg) 1986 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1987 kl->l_wchan = PTRTOINT64(l->l_wchan); 1988 #ifdef MULTIPROCESSOR 1989 if (l->l_cpu != NULL) 1990 kl->l_cpuid = l->l_cpu->ci_cpuid; 1991 else 1992 #endif 1993 kl->l_cpuid = KI_NOCPU; 1994 } 1995 1996 int 1997 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1998 struct proc *up) 1999 { 2000 struct ps_strings pss; 2001 struct proc *p; 2002 size_t len, upper_bound, xlen, i; 2003 struct uio auio; 2004 struct iovec aiov; 2005 vaddr_t argv; 2006 pid_t pid; 2007 int nargv, type, error; 2008 char *arg; 2009 char *tmp; 2010 2011 if (namelen != 2) 2012 return (EINVAL); 2013 pid = name[0]; 2014 type = name[1]; 2015 2016 switch (type) { 2017 case KERN_PROC_ARGV: 2018 case KERN_PROC_NARGV: 2019 case KERN_PROC_ENV: 2020 case KERN_PROC_NENV: 2021 /* ok */ 2022 break; 2023 default: 2024 return (EINVAL); 2025 } 2026 2027 /* check pid */ 2028 if ((p = pfind(pid)) == NULL) 2029 return (EINVAL); 2030 2031 /* only root or same user change look at the environment */ 2032 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 2033 if (up->p_ucred->cr_uid != 0) { 2034 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 2035 up->p_cred->p_ruid != p->p_cred->p_svuid) 2036 return (EPERM); 2037 } 2038 } 2039 2040 if (sizep != NULL && where == NULL) { 2041 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 2042 *sizep = sizeof (int); 2043 else 2044 *sizep = ARG_MAX; /* XXX XXX XXX */ 2045 return (0); 2046 } 2047 if (where == NULL || sizep == NULL) 2048 return (EINVAL); 2049 2050 /* 2051 * Zombies don't have a stack, so we can't read their psstrings. 2052 * System processes also don't have a user stack. 2053 */ 2054 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 2055 return (EINVAL); 2056 2057 /* 2058 * Lock the process down in memory. 2059 */ 2060 /* XXXCDC: how should locking work here? */ 2061 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 2062 return (EFAULT); 2063 2064 p->p_vmspace->vm_refcnt++; /* XXX */ 2065 2066 /* 2067 * Allocate a temporary buffer to hold the arguments. 2068 */ 2069 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2070 2071 /* 2072 * Read in the ps_strings structure. 2073 */ 2074 aiov.iov_base = &pss; 2075 aiov.iov_len = sizeof(pss); 2076 auio.uio_iov = &aiov; 2077 auio.uio_iovcnt = 1; 2078 auio.uio_offset = (vaddr_t)p->p_psstr; 2079 auio.uio_resid = sizeof(pss); 2080 auio.uio_segflg = UIO_SYSSPACE; 2081 auio.uio_rw = UIO_READ; 2082 auio.uio_procp = NULL; 2083 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2084 if (error) 2085 goto done; 2086 2087 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2088 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2089 else 2090 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2091 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2092 error = copyout(&nargv, where, sizeof(nargv)); 2093 *sizep = sizeof(nargv); 2094 goto done; 2095 } 2096 /* 2097 * Now read the address of the argument vector. 2098 */ 2099 switch (type) { 2100 case KERN_PROC_ARGV: 2101 /* XXX compat32 stuff here */ 2102 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2103 break; 2104 case KERN_PROC_ENV: 2105 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2106 break; 2107 default: 2108 return (EINVAL); 2109 } 2110 auio.uio_offset = (off_t)(long)tmp; 2111 aiov.iov_base = &argv; 2112 aiov.iov_len = sizeof(argv); 2113 auio.uio_iov = &aiov; 2114 auio.uio_iovcnt = 1; 2115 auio.uio_resid = sizeof(argv); 2116 auio.uio_segflg = UIO_SYSSPACE; 2117 auio.uio_rw = UIO_READ; 2118 auio.uio_procp = NULL; 2119 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2120 if (error) 2121 goto done; 2122 2123 /* 2124 * Now copy in the actual argument vector, one page at a time, 2125 * since we don't know how long the vector is (though, we do 2126 * know how many NUL-terminated strings are in the vector). 2127 */ 2128 len = 0; 2129 upper_bound = *sizep; 2130 for (; nargv != 0 && len < upper_bound; len += xlen) { 2131 aiov.iov_base = arg; 2132 aiov.iov_len = PAGE_SIZE; 2133 auio.uio_iov = &aiov; 2134 auio.uio_iovcnt = 1; 2135 auio.uio_offset = argv + len; 2136 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2137 auio.uio_resid = xlen; 2138 auio.uio_segflg = UIO_SYSSPACE; 2139 auio.uio_rw = UIO_READ; 2140 auio.uio_procp = NULL; 2141 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2142 if (error) 2143 goto done; 2144 2145 for (i = 0; i < xlen && nargv != 0; i++) { 2146 if (arg[i] == '\0') 2147 nargv--; /* one full string */ 2148 } 2149 2150 /* 2151 * Make sure we don't copyout past the end of the user's 2152 * buffer. 2153 */ 2154 if (len + i > upper_bound) 2155 i = upper_bound - len; 2156 2157 error = copyout(arg, (char *)where + len, i); 2158 if (error) 2159 break; 2160 2161 if (nargv == 0) { 2162 len += i; 2163 break; 2164 } 2165 } 2166 *sizep = len; 2167 2168 done: 2169 uvmspace_free(p->p_vmspace); 2170 2171 free(arg, M_TEMP); 2172 return (error); 2173 } 2174 2175 #if NPTY > 0 2176 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2177 2178 /* 2179 * Validate parameters and get old / set new parameters 2180 * for pty sysctl function. 2181 */ 2182 static int 2183 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2184 { 2185 int error = 0; 2186 int oldmax = 0, newmax = 0; 2187 2188 /* get current value of maxptys */ 2189 oldmax = pty_maxptys(0, 0); 2190 2191 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2192 2193 if (!error && newp) { 2194 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2195 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2196 2197 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2198 return (EINVAL); 2199 2200 } 2201 2202 return (error); 2203 } 2204 #endif /* NPTY > 0 */ 2205 2206 static int 2207 sysctl_dotkstat(name, namelen, where, sizep, newp) 2208 int *name; 2209 u_int namelen; 2210 void *where; 2211 size_t *sizep; 2212 void *newp; 2213 { 2214 /* all sysctl names at this level are terminal */ 2215 if (namelen != 1) 2216 return (ENOTDIR); /* overloaded */ 2217 2218 switch (name[0]) { 2219 case KERN_TKSTAT_NIN: 2220 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2221 case KERN_TKSTAT_NOUT: 2222 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2223 case KERN_TKSTAT_CANCC: 2224 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2225 case KERN_TKSTAT_RAWCC: 2226 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2227 default: 2228 return (EOPNOTSUPP); 2229 } 2230 } 2231
Indexes created Tue Sep 23 14:10:03 GMT 2025