kern_sysctl.c revision 1.130
1 /* $NetBSD: kern_sysctl.c,v 1.130 2003/03/05 11:46:49 dsl 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 1.130 2003/03/05 11:46:49 dsl 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" 994 * with ename "irix", we limit the comparison 995 * to the length of ename. 996 */ 997 if (e == NULL || 998 strncmp(ename, e->e_name, strlen(ename)) != 0 || 999 e->e_sysctl == NULL) 1000 continue; 1001 1002 return ((*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1003 newp, newlen, p)); 1004 } 1005 1006 return (EOPNOTSUPP); 1007 #endif 1008 } 1009 /* 1010 * Convenience macros. 1011 */ 1012 1013 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 1014 if (oldlenp) { \ 1015 if (!oldp) \ 1016 *oldlenp = len; \ 1017 else { \ 1018 if (*oldlenp < len) \ 1019 return (ENOMEM); \ 1020 *oldlenp = len; \ 1021 error = copyout((caddr_t)valp, oldp, len); \ 1022 } \ 1023 } 1024 1025 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 1026 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 1027 1028 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 1029 if (newp && newlen != len) \ 1030 return (EINVAL); 1031 1032 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1033 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1034 1035 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1036 if (error == 0 && newp) \ 1037 error = copyin(newp, valp, len); 1038 1039 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1040 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1041 1042 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1043 if (oldlenp) { \ 1044 len = strlen(str) + 1; \ 1045 if (!oldp) \ 1046 *oldlenp = len; \ 1047 else { \ 1048 if (*oldlenp < len) { \ 1049 err2 = ENOMEM; \ 1050 len = *oldlenp; \ 1051 } else \ 1052 *oldlenp = len; \ 1053 error = copyout(str, oldp, len);\ 1054 if (error == 0) \ 1055 error = err2; \ 1056 } \ 1057 } 1058 1059 /* 1060 * Validate parameters and get old / set new parameters 1061 * for an integer-valued sysctl function. 1062 */ 1063 int 1064 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1065 { 1066 int error = 0; 1067 1068 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1069 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1070 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1071 1072 return (error); 1073 } 1074 1075 1076 /* 1077 * As above, but read-only. 1078 */ 1079 int 1080 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1081 { 1082 int error = 0; 1083 1084 if (newp) 1085 return (EPERM); 1086 1087 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1088 1089 return (error); 1090 } 1091 1092 /* 1093 * Validate parameters and get old / set new parameters 1094 * for an quad-valued sysctl function. 1095 */ 1096 int 1097 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1098 quad_t *valp) 1099 { 1100 int error = 0; 1101 1102 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1103 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1104 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1105 1106 return (error); 1107 } 1108 1109 /* 1110 * As above, but read-only. 1111 */ 1112 int 1113 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1114 { 1115 int error = 0; 1116 1117 if (newp) 1118 return (EPERM); 1119 1120 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1121 1122 return (error); 1123 } 1124 1125 /* 1126 * Validate parameters and get old / set new parameters 1127 * for a string-valued sysctl function. 1128 */ 1129 int 1130 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1131 size_t maxlen) 1132 { 1133 int error = 0, err2 = 0; 1134 size_t len; 1135 1136 if (newp && newlen >= maxlen) 1137 return (EINVAL); 1138 1139 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1140 1141 if (error == 0 && newp) { 1142 error = copyin(newp, str, newlen); 1143 str[newlen] = 0; 1144 } 1145 return (error); 1146 } 1147 1148 /* 1149 * As above, but read-only. 1150 */ 1151 int 1152 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1153 { 1154 int error = 0, err2 = 0; 1155 size_t len; 1156 1157 if (newp) 1158 return (EPERM); 1159 1160 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1161 1162 return (error); 1163 } 1164 1165 /* 1166 * Validate parameters and get old / set new parameters 1167 * for a structure oriented sysctl function. 1168 */ 1169 int 1170 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1171 size_t len) 1172 { 1173 int error = 0; 1174 1175 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1176 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1177 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1178 1179 return (error); 1180 } 1181 1182 /* 1183 * Validate parameters and get old parameters 1184 * for a structure oriented sysctl function. 1185 */ 1186 int 1187 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1188 size_t len) 1189 { 1190 int error = 0; 1191 1192 if (newp) 1193 return (EPERM); 1194 1195 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1196 1197 return (error); 1198 } 1199 1200 /* 1201 * As above, but can return a truncated result. 1202 */ 1203 int 1204 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1205 size_t len) 1206 { 1207 int error = 0; 1208 1209 if (newp) 1210 return (EPERM); 1211 1212 len = min(*oldlenp, len); 1213 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1214 1215 return (error); 1216 } 1217 1218 /* 1219 * Get file structures. 1220 */ 1221 static int 1222 sysctl_file(void *vwhere, size_t *sizep) 1223 { 1224 int error; 1225 size_t buflen; 1226 struct file *fp; 1227 char *start, *where; 1228 1229 start = where = vwhere; 1230 buflen = *sizep; 1231 if (where == NULL) { 1232 /* 1233 * overestimate by 10 files 1234 */ 1235 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1236 return (0); 1237 } 1238 1239 /* 1240 * first copyout filehead 1241 */ 1242 if (buflen < sizeof(filehead)) { 1243 *sizep = 0; 1244 return (0); 1245 } 1246 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1247 if (error) 1248 return (error); 1249 buflen -= sizeof(filehead); 1250 where += sizeof(filehead); 1251 1252 /* 1253 * followed by an array of file structures 1254 */ 1255 LIST_FOREACH(fp, &filehead, f_list) { 1256 if (buflen < sizeof(struct file)) { 1257 *sizep = where - start; 1258 return (ENOMEM); 1259 } 1260 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1261 if (error) 1262 return (error); 1263 buflen -= sizeof(struct file); 1264 where += sizeof(struct file); 1265 } 1266 *sizep = where - start; 1267 return (0); 1268 } 1269 1270 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1271 #define FILL_PERM(src, dst) do { \ 1272 (dst)._key = (src)._key; \ 1273 (dst).uid = (src).uid; \ 1274 (dst).gid = (src).gid; \ 1275 (dst).cuid = (src).cuid; \ 1276 (dst).cgid = (src).cgid; \ 1277 (dst).mode = (src).mode; \ 1278 (dst)._seq = (src)._seq; \ 1279 } while (/*CONSTCOND*/ 0); 1280 #define FILL_MSG(src, dst) do { \ 1281 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1282 (dst).msg_qnum = (src).msg_qnum; \ 1283 (dst).msg_qbytes = (src).msg_qbytes; \ 1284 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1285 (dst).msg_lspid = (src).msg_lspid; \ 1286 (dst).msg_lrpid = (src).msg_lrpid; \ 1287 (dst).msg_stime = (src).msg_stime; \ 1288 (dst).msg_rtime = (src).msg_rtime; \ 1289 (dst).msg_ctime = (src).msg_ctime; \ 1290 } while (/*CONSTCOND*/ 0) 1291 #define FILL_SEM(src, dst) do { \ 1292 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1293 (dst).sem_nsems = (src).sem_nsems; \ 1294 (dst).sem_otime = (src).sem_otime; \ 1295 (dst).sem_ctime = (src).sem_ctime; \ 1296 } while (/*CONSTCOND*/ 0) 1297 #define FILL_SHM(src, dst) do { \ 1298 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1299 (dst).shm_segsz = (src).shm_segsz; \ 1300 (dst).shm_lpid = (src).shm_lpid; \ 1301 (dst).shm_cpid = (src).shm_cpid; \ 1302 (dst).shm_atime = (src).shm_atime; \ 1303 (dst).shm_dtime = (src).shm_dtime; \ 1304 (dst).shm_ctime = (src).shm_ctime; \ 1305 (dst).shm_nattch = (src).shm_nattch; \ 1306 } while (/*CONSTCOND*/ 0) 1307 1308 static int 1309 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1310 { 1311 #ifdef SYSVMSG 1312 struct msg_sysctl_info *msgsi = NULL; 1313 #endif 1314 #ifdef SYSVSEM 1315 struct sem_sysctl_info *semsi = NULL; 1316 #endif 1317 #ifdef SYSVSHM 1318 struct shm_sysctl_info *shmsi = NULL; 1319 #endif 1320 size_t infosize, dssize, tsize, buflen; 1321 void *buf = NULL; 1322 char *start; 1323 int32_t nds; 1324 int i, error, ret; 1325 1326 if (namelen != 1) 1327 return (EINVAL); 1328 1329 start = where; 1330 buflen = *sizep; 1331 1332 switch (*name) { 1333 case KERN_SYSVIPC_MSG_INFO: 1334 #ifdef SYSVMSG 1335 infosize = sizeof(msgsi->msginfo); 1336 nds = msginfo.msgmni; 1337 dssize = sizeof(msgsi->msgids[0]); 1338 break; 1339 #else 1340 return (EINVAL); 1341 #endif 1342 case KERN_SYSVIPC_SEM_INFO: 1343 #ifdef SYSVSEM 1344 infosize = sizeof(semsi->seminfo); 1345 nds = seminfo.semmni; 1346 dssize = sizeof(semsi->semids[0]); 1347 break; 1348 #else 1349 return (EINVAL); 1350 #endif 1351 case KERN_SYSVIPC_SHM_INFO: 1352 #ifdef SYSVSHM 1353 infosize = sizeof(shmsi->shminfo); 1354 nds = shminfo.shmmni; 1355 dssize = sizeof(shmsi->shmids[0]); 1356 break; 1357 #else 1358 return (EINVAL); 1359 #endif 1360 default: 1361 return (EINVAL); 1362 } 1363 /* 1364 * Round infosize to 64 bit boundary if requesting more than just 1365 * the info structure or getting the total data size. 1366 */ 1367 if (where == NULL || *sizep > infosize) 1368 infosize = ((infosize + 7) / 8) * 8; 1369 tsize = infosize + nds * dssize; 1370 1371 /* Return just the total size required. */ 1372 if (where == NULL) { 1373 *sizep = tsize; 1374 return (0); 1375 } 1376 1377 /* Not enough room for even the info struct. */ 1378 if (buflen < infosize) { 1379 *sizep = 0; 1380 return (ENOMEM); 1381 } 1382 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1383 memset(buf, 0, min(tsize, buflen)); 1384 1385 switch (*name) { 1386 #ifdef SYSVMSG 1387 case KERN_SYSVIPC_MSG_INFO: 1388 msgsi = (struct msg_sysctl_info *)buf; 1389 msgsi->msginfo = msginfo; 1390 break; 1391 #endif 1392 #ifdef SYSVSEM 1393 case KERN_SYSVIPC_SEM_INFO: 1394 semsi = (struct sem_sysctl_info *)buf; 1395 semsi->seminfo = seminfo; 1396 break; 1397 #endif 1398 #ifdef SYSVSHM 1399 case KERN_SYSVIPC_SHM_INFO: 1400 shmsi = (struct shm_sysctl_info *)buf; 1401 shmsi->shminfo = shminfo; 1402 break; 1403 #endif 1404 } 1405 buflen -= infosize; 1406 1407 ret = 0; 1408 if (buflen > 0) { 1409 /* Fill in the IPC data structures. */ 1410 for (i = 0; i < nds; i++) { 1411 if (buflen < dssize) { 1412 ret = ENOMEM; 1413 break; 1414 } 1415 switch (*name) { 1416 #ifdef SYSVMSG 1417 case KERN_SYSVIPC_MSG_INFO: 1418 FILL_MSG(msqids[i], msgsi->msgids[i]); 1419 break; 1420 #endif 1421 #ifdef SYSVSEM 1422 case KERN_SYSVIPC_SEM_INFO: 1423 FILL_SEM(sema[i], semsi->semids[i]); 1424 break; 1425 #endif 1426 #ifdef SYSVSHM 1427 case KERN_SYSVIPC_SHM_INFO: 1428 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1429 break; 1430 #endif 1431 } 1432 buflen -= dssize; 1433 } 1434 } 1435 *sizep -= buflen; 1436 error = copyout(buf, start, *sizep); 1437 /* If copyout succeeded, use return code set earlier. */ 1438 if (error == 0) 1439 error = ret; 1440 if (buf) 1441 free(buf, M_TEMP); 1442 return (error); 1443 } 1444 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1445 1446 static int 1447 sysctl_msgbuf(void *vwhere, size_t *sizep) 1448 { 1449 char *where = vwhere; 1450 size_t len, maxlen = *sizep; 1451 long beg, end; 1452 int error; 1453 1454 /* 1455 * deal with cases where the message buffer has 1456 * become corrupted. 1457 */ 1458 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1459 msgbufenabled = 0; 1460 return (ENXIO); 1461 } 1462 1463 if (where == NULL) { 1464 /* always return full buffer size */ 1465 *sizep = msgbufp->msg_bufs; 1466 return (0); 1467 } 1468 1469 error = 0; 1470 maxlen = min(msgbufp->msg_bufs, maxlen); 1471 1472 /* 1473 * First, copy from the write pointer to the end of 1474 * message buffer. 1475 */ 1476 beg = msgbufp->msg_bufx; 1477 end = msgbufp->msg_bufs; 1478 while (maxlen > 0) { 1479 len = min(end - beg, maxlen); 1480 if (len == 0) 1481 break; 1482 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1483 if (error) 1484 break; 1485 where += len; 1486 maxlen -= len; 1487 1488 /* 1489 * ... then, copy from the beginning of message buffer to 1490 * the write pointer. 1491 */ 1492 beg = 0; 1493 end = msgbufp->msg_bufx; 1494 } 1495 return (error); 1496 } 1497 1498 /* 1499 * try over estimating by 5 procs 1500 */ 1501 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1502 1503 static int 1504 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1505 { 1506 struct eproc eproc; 1507 struct kinfo_proc2 kproc2; 1508 struct kinfo_proc *dp; 1509 struct proc *p; 1510 const struct proclist_desc *pd; 1511 char *where, *dp2; 1512 int type, op, arg; 1513 u_int elem_size, elem_count; 1514 size_t buflen, needed; 1515 int error; 1516 1517 dp = vwhere; 1518 dp2 = where = vwhere; 1519 buflen = where != NULL ? *sizep : 0; 1520 error = 0; 1521 needed = 0; 1522 type = name[0]; 1523 1524 if (type == KERN_PROC) { 1525 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1526 return (EINVAL); 1527 op = name[1]; 1528 if (op != KERN_PROC_ALL) 1529 arg = name[2]; 1530 else 1531 arg = 0; /* Quell compiler warning */ 1532 elem_size = elem_count = 0; /* Ditto */ 1533 } else { 1534 if (namelen != 5) 1535 return (EINVAL); 1536 op = name[1]; 1537 arg = name[2]; 1538 elem_size = name[3]; 1539 elem_count = name[4]; 1540 } 1541 1542 proclist_lock_read(); 1543 1544 pd = proclists; 1545 again: 1546 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1547 /* 1548 * Skip embryonic processes. 1549 */ 1550 if (p->p_stat == SIDL) 1551 continue; 1552 /* 1553 * TODO - make more efficient (see notes below). 1554 * do by session. 1555 */ 1556 switch (op) { 1557 1558 case KERN_PROC_PID: 1559 /* could do this with just a lookup */ 1560 if (p->p_pid != (pid_t)arg) 1561 continue; 1562 break; 1563 1564 case KERN_PROC_PGRP: 1565 /* could do this by traversing pgrp */ 1566 if (p->p_pgrp->pg_id != (pid_t)arg) 1567 continue; 1568 break; 1569 1570 case KERN_PROC_SESSION: 1571 if (p->p_session->s_sid != (pid_t)arg) 1572 continue; 1573 break; 1574 1575 case KERN_PROC_TTY: 1576 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1577 if ((p->p_flag & P_CONTROLT) == 0 || 1578 p->p_session->s_ttyp == NULL || 1579 p->p_session->s_ttyvp != NULL) 1580 continue; 1581 } else if ((p->p_flag & P_CONTROLT) == 0 || 1582 p->p_session->s_ttyp == NULL) { 1583 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1584 continue; 1585 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1586 continue; 1587 break; 1588 1589 case KERN_PROC_UID: 1590 if (p->p_ucred->cr_uid != (uid_t)arg) 1591 continue; 1592 break; 1593 1594 case KERN_PROC_RUID: 1595 if (p->p_cred->p_ruid != (uid_t)arg) 1596 continue; 1597 break; 1598 1599 case KERN_PROC_GID: 1600 if (p->p_ucred->cr_gid != (uid_t)arg) 1601 continue; 1602 break; 1603 1604 case KERN_PROC_RGID: 1605 if (p->p_cred->p_rgid != (uid_t)arg) 1606 continue; 1607 break; 1608 1609 case KERN_PROC_ALL: 1610 /* allow everything */ 1611 break; 1612 1613 default: 1614 error = EINVAL; 1615 goto cleanup; 1616 } 1617 if (type == KERN_PROC) { 1618 if (buflen >= sizeof(struct kinfo_proc)) { 1619 fill_eproc(p, &eproc); 1620 error = copyout((caddr_t)p, &dp->kp_proc, 1621 sizeof(struct proc)); 1622 if (error) 1623 goto cleanup; 1624 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1625 sizeof(eproc)); 1626 if (error) 1627 goto cleanup; 1628 dp++; 1629 buflen -= sizeof(struct kinfo_proc); 1630 } 1631 needed += sizeof(struct kinfo_proc); 1632 } else { /* KERN_PROC2 */ 1633 if (buflen >= elem_size && elem_count > 0) { 1634 fill_kproc2(p, &kproc2); 1635 /* 1636 * Copy out elem_size, but not larger than 1637 * the size of a struct kinfo_proc2. 1638 */ 1639 error = copyout(&kproc2, dp2, 1640 min(sizeof(kproc2), elem_size)); 1641 if (error) 1642 goto cleanup; 1643 dp2 += elem_size; 1644 buflen -= elem_size; 1645 elem_count--; 1646 } 1647 needed += elem_size; 1648 } 1649 } 1650 pd++; 1651 if (pd->pd_list != NULL) 1652 goto again; 1653 proclist_unlock_read(); 1654 1655 if (where != NULL) { 1656 if (type == KERN_PROC) 1657 *sizep = (caddr_t)dp - where; 1658 else 1659 *sizep = dp2 - where; 1660 if (needed > *sizep) 1661 return (ENOMEM); 1662 } else { 1663 needed += KERN_PROCSLOP; 1664 *sizep = needed; 1665 } 1666 return (0); 1667 cleanup: 1668 proclist_unlock_read(); 1669 return (error); 1670 } 1671 1672 1673 /* 1674 * try over estimating by 5 LWPs 1675 */ 1676 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1677 1678 static int 1679 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1680 { 1681 struct kinfo_lwp klwp; 1682 struct proc *p; 1683 struct lwp *l; 1684 char *where, *dp; 1685 int type, pid, elem_size, elem_count; 1686 int buflen, needed, error; 1687 1688 dp = where = vwhere; 1689 buflen = where != NULL ? *sizep : 0; 1690 error = needed = 0; 1691 type = name[0]; 1692 1693 if (namelen != 4) 1694 return (EINVAL); 1695 pid = name[1]; 1696 elem_size = name[2]; 1697 elem_count = name[3]; 1698 1699 p = pfind(pid); 1700 if (p == NULL) 1701 return (ESRCH); 1702 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1703 if (buflen >= elem_size && elem_count > 0) { 1704 fill_lwp(l, &klwp); 1705 /* 1706 * Copy out elem_size, but not larger than 1707 * the size of a struct kinfo_proc2. 1708 */ 1709 error = copyout(&klwp, dp, 1710 min(sizeof(klwp), elem_size)); 1711 if (error) 1712 goto cleanup; 1713 dp += elem_size; 1714 buflen -= elem_size; 1715 elem_count--; 1716 } 1717 needed += elem_size; 1718 } 1719 1720 if (where != NULL) { 1721 *sizep = dp - where; 1722 if (needed > *sizep) 1723 return (ENOMEM); 1724 } else { 1725 needed += KERN_PROCSLOP; 1726 *sizep = needed; 1727 } 1728 return (0); 1729 cleanup: 1730 return (error); 1731 } 1732 1733 /* 1734 * Fill in an eproc structure for the specified process. 1735 */ 1736 void 1737 fill_eproc(struct proc *p, struct eproc *ep) 1738 { 1739 struct tty *tp; 1740 struct lwp *l; 1741 1742 ep->e_paddr = p; 1743 ep->e_sess = p->p_session; 1744 ep->e_pcred = *p->p_cred; 1745 ep->e_ucred = *p->p_ucred; 1746 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1747 ep->e_vm.vm_rssize = 0; 1748 ep->e_vm.vm_tsize = 0; 1749 ep->e_vm.vm_dsize = 0; 1750 ep->e_vm.vm_ssize = 0; 1751 /* ep->e_vm.vm_pmap = XXX; */ 1752 } else { 1753 struct vmspace *vm = p->p_vmspace; 1754 1755 ep->e_vm.vm_rssize = vm_resident_count(vm); 1756 ep->e_vm.vm_tsize = vm->vm_tsize; 1757 ep->e_vm.vm_dsize = vm->vm_dsize; 1758 ep->e_vm.vm_ssize = vm->vm_ssize; 1759 1760 /* Pick a "representative" LWP */ 1761 l = proc_representative_lwp(p); 1762 1763 if (l->l_wmesg) 1764 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1765 } 1766 if (p->p_pptr) 1767 ep->e_ppid = p->p_pptr->p_pid; 1768 else 1769 ep->e_ppid = 0; 1770 ep->e_pgid = p->p_pgrp->pg_id; 1771 ep->e_sid = ep->e_sess->s_sid; 1772 ep->e_jobc = p->p_pgrp->pg_jobc; 1773 if ((p->p_flag & P_CONTROLT) && 1774 (tp = ep->e_sess->s_ttyp)) { 1775 ep->e_tdev = tp->t_dev; 1776 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1777 ep->e_tsess = tp->t_session; 1778 } else 1779 ep->e_tdev = NODEV; 1780 1781 ep->e_xsize = ep->e_xrssize = 0; 1782 ep->e_xccount = ep->e_xswrss = 0; 1783 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1784 if (SESS_LEADER(p)) 1785 ep->e_flag |= EPROC_SLEADER; 1786 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1787 } 1788 1789 /* 1790 * Fill in an eproc structure for the specified process. 1791 */ 1792 static void 1793 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1794 { 1795 struct tty *tp; 1796 struct lwp *l; 1797 struct timeval ut, st; 1798 1799 memset(ki, 0, sizeof(*ki)); 1800 1801 ki->p_paddr = PTRTOINT64(p); 1802 ki->p_fd = PTRTOINT64(p->p_fd); 1803 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1804 ki->p_stats = PTRTOINT64(p->p_stats); 1805 ki->p_limit = PTRTOINT64(p->p_limit); 1806 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1807 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1808 ki->p_sess = PTRTOINT64(p->p_session); 1809 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1810 ki->p_ru = PTRTOINT64(p->p_ru); 1811 1812 ki->p_eflag = 0; 1813 ki->p_exitsig = p->p_exitsig; 1814 ki->p_flag = p->p_flag; 1815 1816 ki->p_pid = p->p_pid; 1817 if (p->p_pptr) 1818 ki->p_ppid = p->p_pptr->p_pid; 1819 else 1820 ki->p_ppid = 0; 1821 ki->p_sid = p->p_session->s_sid; 1822 ki->p__pgid = p->p_pgrp->pg_id; 1823 1824 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1825 1826 ki->p_uid = p->p_ucred->cr_uid; 1827 ki->p_ruid = p->p_cred->p_ruid; 1828 ki->p_gid = p->p_ucred->cr_gid; 1829 ki->p_rgid = p->p_cred->p_rgid; 1830 ki->p_svuid = p->p_cred->p_svuid; 1831 ki->p_svgid = p->p_cred->p_svgid; 1832 1833 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1834 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1835 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1836 1837 ki->p_jobc = p->p_pgrp->pg_jobc; 1838 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1839 ki->p_tdev = tp->t_dev; 1840 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1841 ki->p_tsess = PTRTOINT64(tp->t_session); 1842 } else { 1843 ki->p_tdev = NODEV; 1844 } 1845 1846 ki->p_estcpu = p->p_estcpu; 1847 ki->p_rtime_sec = p->p_rtime.tv_sec; 1848 ki->p_rtime_usec = p->p_rtime.tv_usec; 1849 ki->p_cpticks = p->p_cpticks; 1850 ki->p_pctcpu = p->p_pctcpu; 1851 1852 ki->p_uticks = p->p_uticks; 1853 ki->p_sticks = p->p_sticks; 1854 ki->p_iticks = p->p_iticks; 1855 1856 ki->p_tracep = PTRTOINT64(p->p_tracep); 1857 ki->p_traceflag = p->p_traceflag; 1858 1859 1860 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1861 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1862 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1863 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1864 1865 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1866 ki->p_realstat = p->p_stat; 1867 ki->p_nice = p->p_nice; 1868 1869 ki->p_xstat = p->p_xstat; 1870 ki->p_acflag = p->p_acflag; 1871 1872 strncpy(ki->p_comm, p->p_comm, 1873 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1874 1875 strncpy(ki->p_login, p->p_session->s_login, 1876 min(sizeof ki->p_login - 1, sizeof p->p_session->s_login)); 1877 1878 ki->p_nlwps = p->p_nlwps; 1879 ki->p_nrlwps = p->p_nrlwps; 1880 ki->p_realflag = p->p_flag; 1881 1882 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1883 ki->p_vm_rssize = 0; 1884 ki->p_vm_tsize = 0; 1885 ki->p_vm_dsize = 0; 1886 ki->p_vm_ssize = 0; 1887 l = NULL; 1888 } else { 1889 struct vmspace *vm = p->p_vmspace; 1890 1891 ki->p_vm_rssize = vm_resident_count(vm); 1892 ki->p_vm_tsize = vm->vm_tsize; 1893 ki->p_vm_dsize = vm->vm_dsize; 1894 ki->p_vm_ssize = vm->vm_ssize; 1895 1896 /* Pick a "representative" LWP */ 1897 l = proc_representative_lwp(p); 1898 ki->p_forw = PTRTOINT64(l->l_forw); 1899 ki->p_back = PTRTOINT64(l->l_back); 1900 ki->p_addr = PTRTOINT64(l->l_addr); 1901 ki->p_stat = l->l_stat; 1902 ki->p_flag |= l->l_flag; 1903 ki->p_swtime = l->l_swtime; 1904 ki->p_slptime = l->l_slptime; 1905 if (l->l_stat == LSONPROC) { 1906 KDASSERT(l->l_cpu != NULL); 1907 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1908 } else 1909 ki->p_schedflags = 0; 1910 ki->p_holdcnt = l->l_holdcnt; 1911 ki->p_priority = l->l_priority; 1912 ki->p_usrpri = l->l_usrpri; 1913 if (l->l_wmesg) 1914 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1915 ki->p_wchan = PTRTOINT64(l->l_wchan); 1916 1917 } 1918 1919 if (p->p_session->s_ttyvp) 1920 ki->p_eflag |= EPROC_CTTY; 1921 if (SESS_LEADER(p)) 1922 ki->p_eflag |= EPROC_SLEADER; 1923 1924 /* XXX Is this double check necessary? */ 1925 if (P_ZOMBIE(p)) { 1926 ki->p_uvalid = 0; 1927 } else { 1928 ki->p_uvalid = 1; 1929 1930 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1931 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1932 1933 calcru(p, &ut, &st, 0); 1934 ki->p_uutime_sec = ut.tv_sec; 1935 ki->p_uutime_usec = ut.tv_usec; 1936 ki->p_ustime_sec = st.tv_sec; 1937 ki->p_ustime_usec = st.tv_usec; 1938 1939 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1940 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1941 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1942 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1943 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1944 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1945 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1946 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1947 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1948 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1949 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1950 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1951 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1952 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1953 1954 timeradd(&p->p_stats->p_cru.ru_utime, 1955 &p->p_stats->p_cru.ru_stime, &ut); 1956 ki->p_uctime_sec = ut.tv_sec; 1957 ki->p_uctime_usec = ut.tv_usec; 1958 } 1959 #ifdef MULTIPROCESSOR 1960 if (l && l->l_cpu != NULL) 1961 ki->p_cpuid = l->l_cpu->ci_cpuid; 1962 else 1963 #endif 1964 ki->p_cpuid = KI_NOCPU; 1965 1966 } 1967 1968 /* 1969 * Fill in a kinfo_lwp structure for the specified lwp. 1970 */ 1971 static void 1972 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1973 { 1974 1975 kl->l_forw = PTRTOINT64(l->l_forw); 1976 kl->l_back = PTRTOINT64(l->l_back); 1977 kl->l_laddr = PTRTOINT64(l); 1978 kl->l_addr = PTRTOINT64(l->l_addr); 1979 kl->l_stat = l->l_stat; 1980 kl->l_lid = l->l_lid; 1981 kl->l_flag = l->l_flag; 1982 1983 kl->l_swtime = l->l_swtime; 1984 kl->l_slptime = l->l_slptime; 1985 if (l->l_stat == LSONPROC) { 1986 KDASSERT(l->l_cpu != NULL); 1987 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1988 } else 1989 kl->l_schedflags = 0; 1990 kl->l_holdcnt = l->l_holdcnt; 1991 kl->l_priority = l->l_priority; 1992 kl->l_usrpri = l->l_usrpri; 1993 if (l->l_wmesg) 1994 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1995 kl->l_wchan = PTRTOINT64(l->l_wchan); 1996 #ifdef MULTIPROCESSOR 1997 if (l->l_cpu != NULL) 1998 kl->l_cpuid = l->l_cpu->ci_cpuid; 1999 else 2000 #endif 2001 kl->l_cpuid = KI_NOCPU; 2002 } 2003 2004 int 2005 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 2006 struct proc *up) 2007 { 2008 struct ps_strings pss; 2009 struct proc *p; 2010 size_t len, upper_bound, xlen, i; 2011 struct uio auio; 2012 struct iovec aiov; 2013 vaddr_t argv; 2014 pid_t pid; 2015 int nargv, type, error; 2016 char *arg; 2017 char *tmp; 2018 2019 if (namelen != 2) 2020 return (EINVAL); 2021 pid = name[0]; 2022 type = name[1]; 2023 2024 switch (type) { 2025 case KERN_PROC_ARGV: 2026 case KERN_PROC_NARGV: 2027 case KERN_PROC_ENV: 2028 case KERN_PROC_NENV: 2029 /* ok */ 2030 break; 2031 default: 2032 return (EINVAL); 2033 } 2034 2035 /* check pid */ 2036 if ((p = pfind(pid)) == NULL) 2037 return (EINVAL); 2038 2039 /* only root or same user change look at the environment */ 2040 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 2041 if (up->p_ucred->cr_uid != 0) { 2042 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 2043 up->p_cred->p_ruid != p->p_cred->p_svuid) 2044 return (EPERM); 2045 } 2046 } 2047 2048 if (sizep != NULL && where == NULL) { 2049 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 2050 *sizep = sizeof (int); 2051 else 2052 *sizep = ARG_MAX; /* XXX XXX XXX */ 2053 return (0); 2054 } 2055 if (where == NULL || sizep == NULL) 2056 return (EINVAL); 2057 2058 /* 2059 * Zombies don't have a stack, so we can't read their psstrings. 2060 * System processes also don't have a user stack. 2061 */ 2062 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 2063 return (EINVAL); 2064 2065 /* 2066 * Lock the process down in memory. 2067 */ 2068 /* XXXCDC: how should locking work here? */ 2069 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 2070 return (EFAULT); 2071 2072 p->p_vmspace->vm_refcnt++; /* XXX */ 2073 2074 /* 2075 * Allocate a temporary buffer to hold the arguments. 2076 */ 2077 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2078 2079 /* 2080 * Read in the ps_strings structure. 2081 */ 2082 aiov.iov_base = &pss; 2083 aiov.iov_len = sizeof(pss); 2084 auio.uio_iov = &aiov; 2085 auio.uio_iovcnt = 1; 2086 auio.uio_offset = (vaddr_t)p->p_psstr; 2087 auio.uio_resid = sizeof(pss); 2088 auio.uio_segflg = UIO_SYSSPACE; 2089 auio.uio_rw = UIO_READ; 2090 auio.uio_procp = NULL; 2091 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2092 if (error) 2093 goto done; 2094 2095 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2096 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2097 else 2098 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2099 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2100 error = copyout(&nargv, where, sizeof(nargv)); 2101 *sizep = sizeof(nargv); 2102 goto done; 2103 } 2104 /* 2105 * Now read the address of the argument vector. 2106 */ 2107 switch (type) { 2108 case KERN_PROC_ARGV: 2109 /* XXX compat32 stuff here */ 2110 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2111 break; 2112 case KERN_PROC_ENV: 2113 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2114 break; 2115 default: 2116 return (EINVAL); 2117 } 2118 auio.uio_offset = (off_t)(long)tmp; 2119 aiov.iov_base = &argv; 2120 aiov.iov_len = sizeof(argv); 2121 auio.uio_iov = &aiov; 2122 auio.uio_iovcnt = 1; 2123 auio.uio_resid = sizeof(argv); 2124 auio.uio_segflg = UIO_SYSSPACE; 2125 auio.uio_rw = UIO_READ; 2126 auio.uio_procp = NULL; 2127 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2128 if (error) 2129 goto done; 2130 2131 /* 2132 * Now copy in the actual argument vector, one page at a time, 2133 * since we don't know how long the vector is (though, we do 2134 * know how many NUL-terminated strings are in the vector). 2135 */ 2136 len = 0; 2137 upper_bound = *sizep; 2138 for (; nargv != 0 && len < upper_bound; len += xlen) { 2139 aiov.iov_base = arg; 2140 aiov.iov_len = PAGE_SIZE; 2141 auio.uio_iov = &aiov; 2142 auio.uio_iovcnt = 1; 2143 auio.uio_offset = argv + len; 2144 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2145 auio.uio_resid = xlen; 2146 auio.uio_segflg = UIO_SYSSPACE; 2147 auio.uio_rw = UIO_READ; 2148 auio.uio_procp = NULL; 2149 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2150 if (error) 2151 goto done; 2152 2153 for (i = 0; i < xlen && nargv != 0; i++) { 2154 if (arg[i] == '\0') 2155 nargv--; /* one full string */ 2156 } 2157 2158 /* 2159 * Make sure we don't copyout past the end of the user's 2160 * buffer. 2161 */ 2162 if (len + i > upper_bound) 2163 i = upper_bound - len; 2164 2165 error = copyout(arg, (char *)where + len, i); 2166 if (error) 2167 break; 2168 2169 if (nargv == 0) { 2170 len += i; 2171 break; 2172 } 2173 } 2174 *sizep = len; 2175 2176 done: 2177 uvmspace_free(p->p_vmspace); 2178 2179 free(arg, M_TEMP); 2180 return (error); 2181 } 2182 2183 #if NPTY > 0 2184 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2185 2186 /* 2187 * Validate parameters and get old / set new parameters 2188 * for pty sysctl function. 2189 */ 2190 static int 2191 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2192 { 2193 int error = 0; 2194 int oldmax = 0, newmax = 0; 2195 2196 /* get current value of maxptys */ 2197 oldmax = pty_maxptys(0, 0); 2198 2199 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2200 2201 if (!error && newp) { 2202 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2203 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2204 2205 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2206 return (EINVAL); 2207 2208 } 2209 2210 return (error); 2211 } 2212 #endif /* NPTY > 0 */ 2213 2214 static int 2215 sysctl_dotkstat(int *name, u_int namelen, void *where, size_t *sizep, 2216 void *newp) 2217 { 2218 2219 /* all sysctl names at this level are terminal */ 2220 if (namelen != 1) 2221 return (ENOTDIR); /* overloaded */ 2222 2223 switch (name[0]) { 2224 case KERN_TKSTAT_NIN: 2225 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2226 case KERN_TKSTAT_NOUT: 2227 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2228 case KERN_TKSTAT_CANCC: 2229 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2230 case KERN_TKSTAT_RAWCC: 2231 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2232 default: 2233 return (EOPNOTSUPP); 2234 } 2235 } 2236
Indexes created Sun Sep 21 20:09:37 GMT 2025