kern_sysctl.c revision 1.125
1 /* $NetBSD: kern_sysctl.c,v 1.125 2003/02/10 00:35:16 atatat 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 1.125 2003/02/10 00:35:16 atatat 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_USERMEM: 697 return (sysctl_rdint(oldp, oldlenp, newp, 698 ctob(physmem - uvmexp.wired))); 699 case HW_PAGESIZE: 700 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 701 case HW_ALIGNBYTES: 702 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 703 case HW_DISKNAMES: 704 return (sysctl_disknames(oldp, oldlenp)); 705 case HW_DISKSTATS: 706 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 707 case HW_CNMAGIC: { 708 char magic[CNS_LEN]; 709 int error; 710 711 if (oldp) 712 cn_get_magic(magic, CNS_LEN); 713 error = sysctl_string(oldp, oldlenp, newp, newlen, 714 magic, sizeof(magic)); 715 if (newp && !error) { 716 error = cn_set_magic(magic); 717 } 718 return (error); 719 } 720 default: 721 return (EOPNOTSUPP); 722 } 723 /* NOTREACHED */ 724 } 725 726 #ifdef DEBUG 727 /* 728 * Debugging related system variables. 729 */ 730 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 731 struct ctldebug debug5, debug6, debug7, debug8, debug9; 732 struct ctldebug debug10, debug11, debug12, debug13, debug14; 733 struct ctldebug debug15, debug16, debug17, debug18, debug19; 734 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 735 &debug0, &debug1, &debug2, &debug3, &debug4, 736 &debug5, &debug6, &debug7, &debug8, &debug9, 737 &debug10, &debug11, &debug12, &debug13, &debug14, 738 &debug15, &debug16, &debug17, &debug18, &debug19, 739 }; 740 741 int 742 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 743 void *newp, size_t newlen, struct proc *p) 744 { 745 struct ctldebug *cdp; 746 747 /* all sysctl names at this level are name and field */ 748 if (namelen != 2) 749 return (ENOTDIR); /* overloaded */ 750 if (name[0] >= CTL_DEBUG_MAXID) 751 return (EOPNOTSUPP); 752 cdp = debugvars[name[0]]; 753 if (cdp->debugname == 0) 754 return (EOPNOTSUPP); 755 switch (name[1]) { 756 case CTL_DEBUG_NAME: 757 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 758 case CTL_DEBUG_VALUE: 759 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 760 default: 761 return (EOPNOTSUPP); 762 } 763 /* NOTREACHED */ 764 } 765 #endif /* DEBUG */ 766 767 int 768 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 769 void *newp, size_t newlen, struct proc *p) 770 { 771 struct proc *ptmp = NULL; 772 const struct proclist_desc *pd; 773 int error = 0; 774 struct rlimit alim; 775 struct plimit *newplim; 776 char *tmps = NULL; 777 size_t len, curlen; 778 u_int i; 779 780 if (namelen < 2) 781 return EINVAL; 782 783 if (name[0] == PROC_CURPROC) { 784 ptmp = p; 785 } else { 786 proclist_lock_read(); 787 for (pd = proclists; pd->pd_list != NULL; pd++) { 788 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 789 ptmp = LIST_NEXT(ptmp, p_list)) { 790 /* Skip embryonic processes. */ 791 if (ptmp->p_stat == SIDL) 792 continue; 793 if (ptmp->p_pid == (pid_t)name[0]) 794 break; 795 } 796 if (ptmp != NULL) 797 break; 798 } 799 proclist_unlock_read(); 800 if (ptmp == NULL) 801 return(ESRCH); 802 if (p->p_ucred->cr_uid != 0) { 803 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 804 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 805 return EPERM; 806 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 807 return EPERM; /* sgid proc */ 808 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 809 if (p->p_ucred->cr_groups[i] == 810 ptmp->p_cred->p_rgid) 811 break; 812 } 813 if (i == p->p_ucred->cr_ngroups) 814 return EPERM; 815 } 816 } 817 switch(name[1]) { 818 case PROC_PID_STOPFORK: 819 if (namelen != 2) 820 return EINVAL; 821 i = ((ptmp->p_flag & P_STOPFORK) != 0); 822 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 823 return error; 824 if (i != 0) 825 ptmp->p_flag |= P_STOPFORK; 826 else 827 ptmp->p_flag &= ~P_STOPFORK; 828 return 0; 829 break; 830 831 case PROC_PID_STOPEXEC: 832 if (namelen != 2) 833 return EINVAL; 834 i = ((ptmp->p_flag & P_STOPEXEC) != 0); 835 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 836 return error; 837 if (i != 0) 838 ptmp->p_flag |= P_STOPEXEC; 839 else 840 ptmp->p_flag &= ~P_STOPEXEC; 841 return 0; 842 break; 843 844 case PROC_PID_CORENAME: 845 if (namelen != 2) 846 return EINVAL; 847 /* 848 * Can't use sysctl_string() here because we may malloc a new 849 * area during the process, so we have to do it by hand. 850 */ 851 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 852 if (oldlenp && *oldlenp < curlen) { 853 if (!oldp) 854 *oldlenp = curlen; 855 return (ENOMEM); 856 } 857 if (newp) { 858 if (securelevel > 2) 859 return EPERM; 860 if (newlen > MAXPATHLEN) 861 return ENAMETOOLONG; 862 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 863 if (tmps == NULL) 864 return ENOMEM; 865 error = copyin(newp, tmps, newlen + 1); 866 tmps[newlen] = '\0'; 867 if (error) 868 goto cleanup; 869 /* Enforce to be either 'core' for end with '.core' */ 870 if (newlen < 4) { /* c.o.r.e */ 871 error = EINVAL; 872 goto cleanup; 873 } 874 len = newlen - 4; 875 if (len > 0) { 876 if (tmps[len - 1] != '.' && 877 tmps[len - 1] != '/') { 878 error = EINVAL; 879 goto cleanup; 880 } 881 } 882 if (strcmp(&tmps[len], "core") != 0) { 883 error = EINVAL; 884 goto cleanup; 885 } 886 } 887 if (oldp && oldlenp) { 888 *oldlenp = curlen; 889 error = copyout(ptmp->p_limit->pl_corename, oldp, 890 curlen); 891 } 892 if (newp && error == 0) { 893 /* if the 2 strings are identical, don't limcopy() */ 894 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 895 error = 0; 896 goto cleanup; 897 } 898 if (ptmp->p_limit->p_refcnt > 1 && 899 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 900 newplim = limcopy(ptmp->p_limit); 901 limfree(ptmp->p_limit); 902 ptmp->p_limit = newplim; 903 } 904 if (ptmp->p_limit->pl_corename != defcorename) { 905 free(ptmp->p_limit->pl_corename, M_TEMP); 906 } 907 ptmp->p_limit->pl_corename = tmps; 908 return (0); 909 } 910 cleanup: 911 if (tmps) 912 free(tmps, M_TEMP); 913 return (error); 914 break; 915 916 case PROC_PID_LIMIT: 917 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 918 return EINVAL; 919 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 920 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 921 error = sysctl_quad(oldp, oldlenp, newp, newlen, 922 &alim.rlim_max); 923 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 924 error = sysctl_quad(oldp, oldlenp, newp, newlen, 925 &alim.rlim_cur); 926 else 927 error = EINVAL; 928 929 if (error) 930 return error; 931 932 if (newp) 933 error = dosetrlimit(ptmp, p->p_cred, 934 name[2] - 1, &alim); 935 return error; 936 break; 937 938 default: 939 return (EINVAL); 940 break; 941 } 942 /* NOTREACHED */ 943 return (EINVAL); 944 } 945 946 int 947 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 948 void *newp, size_t newlen, struct proc *p) 949 { 950 static struct { 951 const char *name; 952 int type; 953 } emulations[] = CTL_EMUL_NAMES; 954 const struct emul *e; 955 const char *ename; 956 #ifdef LKM 957 extern struct lock exec_lock; /* XXX */ 958 int error; 959 #else 960 extern int nexecs_builtin; 961 extern const struct execsw execsw_builtin[]; 962 int i; 963 #endif 964 965 /* all sysctl names at this level are name and field */ 966 if (namelen < 2) 967 return (ENOTDIR); /* overloaded */ 968 969 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 970 return (EOPNOTSUPP); 971 972 ename = emulations[name[0]].name; 973 974 #ifdef LKM 975 lockmgr(&exec_lock, LK_SHARED, NULL); 976 if ((e = emul_search(ename))) { 977 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 978 newp, newlen, p); 979 } else 980 error = EOPNOTSUPP; 981 lockmgr(&exec_lock, LK_RELEASE, NULL); 982 983 return (error); 984 #else 985 for (i = 0; i < nexecs_builtin; i++) { 986 e = execsw_builtin[i].es_emul; 987 /* 988 * In order to match e.g. e->e_name "irix o32" with ename "irix", 989 * we limit the comparison to the length of ename. 990 */ 991 if (e == NULL || strncmp(ename, e->e_name, strlen(ename)) != 0 || 992 e->e_sysctl == NULL) 993 continue; 994 995 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 996 newp, newlen, p); 997 } 998 999 return (EOPNOTSUPP); 1000 #endif 1001 } 1002 /* 1003 * Convenience macros. 1004 */ 1005 1006 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 1007 if (oldlenp) { \ 1008 if (!oldp) \ 1009 *oldlenp = len; \ 1010 else { \ 1011 if (*oldlenp < len) \ 1012 return(ENOMEM); \ 1013 *oldlenp = len; \ 1014 error = copyout((caddr_t)valp, oldp, len); \ 1015 } \ 1016 } 1017 1018 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 1019 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 1020 1021 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 1022 if (newp && newlen != len) \ 1023 return (EINVAL); 1024 1025 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1026 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1027 1028 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1029 if (error == 0 && newp) \ 1030 error = copyin(newp, valp, len); 1031 1032 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1033 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1034 1035 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1036 if (oldlenp) { \ 1037 len = strlen(str) + 1; \ 1038 if (!oldp) \ 1039 *oldlenp = len; \ 1040 else { \ 1041 if (*oldlenp < len) { \ 1042 err2 = ENOMEM; \ 1043 len = *oldlenp; \ 1044 } else \ 1045 *oldlenp = len; \ 1046 error = copyout(str, oldp, len);\ 1047 if (error == 0) \ 1048 error = err2; \ 1049 } \ 1050 } 1051 1052 /* 1053 * Validate parameters and get old / set new parameters 1054 * for an integer-valued sysctl function. 1055 */ 1056 int 1057 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1058 { 1059 int error = 0; 1060 1061 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1062 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1063 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1064 1065 return (error); 1066 } 1067 1068 1069 /* 1070 * As above, but read-only. 1071 */ 1072 int 1073 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1074 { 1075 int error = 0; 1076 1077 if (newp) 1078 return (EPERM); 1079 1080 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1081 1082 return (error); 1083 } 1084 1085 /* 1086 * Validate parameters and get old / set new parameters 1087 * for an quad-valued sysctl function. 1088 */ 1089 int 1090 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1091 quad_t *valp) 1092 { 1093 int error = 0; 1094 1095 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1096 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1097 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1098 1099 return (error); 1100 } 1101 1102 /* 1103 * As above, but read-only. 1104 */ 1105 int 1106 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1107 { 1108 int error = 0; 1109 1110 if (newp) 1111 return (EPERM); 1112 1113 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1114 1115 return (error); 1116 } 1117 1118 /* 1119 * Validate parameters and get old / set new parameters 1120 * for a string-valued sysctl function. 1121 */ 1122 int 1123 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1124 size_t maxlen) 1125 { 1126 int error = 0, err2 = 0; 1127 size_t len; 1128 1129 if (newp && newlen >= maxlen) 1130 return (EINVAL); 1131 1132 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1133 1134 if (error == 0 && newp) { 1135 error = copyin(newp, str, newlen); 1136 str[newlen] = 0; 1137 } 1138 return (error); 1139 } 1140 1141 /* 1142 * As above, but read-only. 1143 */ 1144 int 1145 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1146 { 1147 int error = 0, err2 = 0; 1148 size_t len; 1149 1150 if (newp) 1151 return (EPERM); 1152 1153 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1154 1155 return (error); 1156 } 1157 1158 /* 1159 * Validate parameters and get old / set new parameters 1160 * for a structure oriented sysctl function. 1161 */ 1162 int 1163 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1164 size_t len) 1165 { 1166 int error = 0; 1167 1168 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1169 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1170 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1171 1172 return (error); 1173 } 1174 1175 /* 1176 * Validate parameters and get old parameters 1177 * for a structure oriented sysctl function. 1178 */ 1179 int 1180 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1181 size_t len) 1182 { 1183 int error = 0; 1184 1185 if (newp) 1186 return (EPERM); 1187 1188 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1189 1190 return (error); 1191 } 1192 1193 /* 1194 * As above, but can return a truncated result. 1195 */ 1196 int 1197 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1198 size_t len) 1199 { 1200 int error = 0; 1201 1202 if (newp) 1203 return (EPERM); 1204 1205 len = min(*oldlenp, len); 1206 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1207 1208 return (error); 1209 } 1210 1211 /* 1212 * Get file structures. 1213 */ 1214 static int 1215 sysctl_file(void *vwhere, size_t *sizep) 1216 { 1217 int error; 1218 size_t buflen; 1219 struct file *fp; 1220 char *start, *where; 1221 1222 start = where = vwhere; 1223 buflen = *sizep; 1224 if (where == NULL) { 1225 /* 1226 * overestimate by 10 files 1227 */ 1228 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1229 return (0); 1230 } 1231 1232 /* 1233 * first copyout filehead 1234 */ 1235 if (buflen < sizeof(filehead)) { 1236 *sizep = 0; 1237 return (0); 1238 } 1239 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1240 if (error) 1241 return (error); 1242 buflen -= sizeof(filehead); 1243 where += sizeof(filehead); 1244 1245 /* 1246 * followed by an array of file structures 1247 */ 1248 LIST_FOREACH(fp, &filehead, f_list) { 1249 if (buflen < sizeof(struct file)) { 1250 *sizep = where - start; 1251 return (ENOMEM); 1252 } 1253 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1254 if (error) 1255 return (error); 1256 buflen -= sizeof(struct file); 1257 where += sizeof(struct file); 1258 } 1259 *sizep = where - start; 1260 return (0); 1261 } 1262 1263 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1264 #define FILL_PERM(src, dst) do { \ 1265 (dst)._key = (src)._key; \ 1266 (dst).uid = (src).uid; \ 1267 (dst).gid = (src).gid; \ 1268 (dst).cuid = (src).cuid; \ 1269 (dst).cgid = (src).cgid; \ 1270 (dst).mode = (src).mode; \ 1271 (dst)._seq = (src)._seq; \ 1272 } while (/*CONSTCOND*/ 0); 1273 #define FILL_MSG(src, dst) do { \ 1274 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1275 (dst).msg_qnum = (src).msg_qnum; \ 1276 (dst).msg_qbytes = (src).msg_qbytes; \ 1277 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1278 (dst).msg_lspid = (src).msg_lspid; \ 1279 (dst).msg_lrpid = (src).msg_lrpid; \ 1280 (dst).msg_stime = (src).msg_stime; \ 1281 (dst).msg_rtime = (src).msg_rtime; \ 1282 (dst).msg_ctime = (src).msg_ctime; \ 1283 } while (/*CONSTCOND*/ 0) 1284 #define FILL_SEM(src, dst) do { \ 1285 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1286 (dst).sem_nsems = (src).sem_nsems; \ 1287 (dst).sem_otime = (src).sem_otime; \ 1288 (dst).sem_ctime = (src).sem_ctime; \ 1289 } while (/*CONSTCOND*/ 0) 1290 #define FILL_SHM(src, dst) do { \ 1291 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1292 (dst).shm_segsz = (src).shm_segsz; \ 1293 (dst).shm_lpid = (src).shm_lpid; \ 1294 (dst).shm_cpid = (src).shm_cpid; \ 1295 (dst).shm_atime = (src).shm_atime; \ 1296 (dst).shm_dtime = (src).shm_dtime; \ 1297 (dst).shm_ctime = (src).shm_ctime; \ 1298 (dst).shm_nattch = (src).shm_nattch; \ 1299 } while (/*CONSTCOND*/ 0) 1300 1301 static int 1302 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1303 { 1304 #ifdef SYSVMSG 1305 struct msg_sysctl_info *msgsi = NULL; 1306 #endif 1307 #ifdef SYSVSEM 1308 struct sem_sysctl_info *semsi = NULL; 1309 #endif 1310 #ifdef SYSVSHM 1311 struct shm_sysctl_info *shmsi = NULL; 1312 #endif 1313 size_t infosize, dssize, tsize, buflen; 1314 void *buf = NULL; 1315 char *start; 1316 int32_t nds; 1317 int i, error, ret; 1318 1319 if (namelen != 1) 1320 return (EINVAL); 1321 1322 start = where; 1323 buflen = *sizep; 1324 1325 switch (*name) { 1326 case KERN_SYSVIPC_MSG_INFO: 1327 #ifdef SYSVMSG 1328 infosize = sizeof(msgsi->msginfo); 1329 nds = msginfo.msgmni; 1330 dssize = sizeof(msgsi->msgids[0]); 1331 break; 1332 #else 1333 return (EINVAL); 1334 #endif 1335 case KERN_SYSVIPC_SEM_INFO: 1336 #ifdef SYSVSEM 1337 infosize = sizeof(semsi->seminfo); 1338 nds = seminfo.semmni; 1339 dssize = sizeof(semsi->semids[0]); 1340 break; 1341 #else 1342 return (EINVAL); 1343 #endif 1344 case KERN_SYSVIPC_SHM_INFO: 1345 #ifdef SYSVSHM 1346 infosize = sizeof(shmsi->shminfo); 1347 nds = shminfo.shmmni; 1348 dssize = sizeof(shmsi->shmids[0]); 1349 break; 1350 #else 1351 return (EINVAL); 1352 #endif 1353 default: 1354 return (EINVAL); 1355 } 1356 /* 1357 * Round infosize to 64 bit boundary if requesting more than just 1358 * the info structure or getting the total data size. 1359 */ 1360 if (where == NULL || *sizep > infosize) 1361 infosize = ((infosize + 7) / 8) * 8; 1362 tsize = infosize + nds * dssize; 1363 1364 /* Return just the total size required. */ 1365 if (where == NULL) { 1366 *sizep = tsize; 1367 return (0); 1368 } 1369 1370 /* Not enough room for even the info struct. */ 1371 if (buflen < infosize) { 1372 *sizep = 0; 1373 return (ENOMEM); 1374 } 1375 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1376 memset(buf, 0, min(tsize, buflen)); 1377 1378 switch (*name) { 1379 #ifdef SYSVMSG 1380 case KERN_SYSVIPC_MSG_INFO: 1381 msgsi = (struct msg_sysctl_info *)buf; 1382 msgsi->msginfo = msginfo; 1383 break; 1384 #endif 1385 #ifdef SYSVSEM 1386 case KERN_SYSVIPC_SEM_INFO: 1387 semsi = (struct sem_sysctl_info *)buf; 1388 semsi->seminfo = seminfo; 1389 break; 1390 #endif 1391 #ifdef SYSVSHM 1392 case KERN_SYSVIPC_SHM_INFO: 1393 shmsi = (struct shm_sysctl_info *)buf; 1394 shmsi->shminfo = shminfo; 1395 break; 1396 #endif 1397 } 1398 buflen -= infosize; 1399 1400 ret = 0; 1401 if (buflen > 0) { 1402 /* Fill in the IPC data structures. */ 1403 for (i = 0; i < nds; i++) { 1404 if (buflen < dssize) { 1405 ret = ENOMEM; 1406 break; 1407 } 1408 switch (*name) { 1409 #ifdef SYSVMSG 1410 case KERN_SYSVIPC_MSG_INFO: 1411 FILL_MSG(msqids[i], msgsi->msgids[i]); 1412 break; 1413 #endif 1414 #ifdef SYSVSEM 1415 case KERN_SYSVIPC_SEM_INFO: 1416 FILL_SEM(sema[i], semsi->semids[i]); 1417 break; 1418 #endif 1419 #ifdef SYSVSHM 1420 case KERN_SYSVIPC_SHM_INFO: 1421 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1422 break; 1423 #endif 1424 } 1425 buflen -= dssize; 1426 } 1427 } 1428 *sizep -= buflen; 1429 error = copyout(buf, start, *sizep); 1430 /* If copyout succeeded, use return code set earlier. */ 1431 if (error == 0) 1432 error = ret; 1433 if (buf) 1434 free(buf, M_TEMP); 1435 return (error); 1436 } 1437 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1438 1439 static int 1440 sysctl_msgbuf(void *vwhere, size_t *sizep) 1441 { 1442 char *where = vwhere; 1443 size_t len, maxlen = *sizep; 1444 long beg, end; 1445 int error; 1446 1447 /* 1448 * deal with cases where the message buffer has 1449 * become corrupted. 1450 */ 1451 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1452 msgbufenabled = 0; 1453 return (ENXIO); 1454 } 1455 1456 if (where == NULL) { 1457 /* always return full buffer size */ 1458 *sizep = msgbufp->msg_bufs; 1459 return (0); 1460 } 1461 1462 error = 0; 1463 maxlen = min(msgbufp->msg_bufs, maxlen); 1464 1465 /* 1466 * First, copy from the write pointer to the end of 1467 * message buffer. 1468 */ 1469 beg = msgbufp->msg_bufx; 1470 end = msgbufp->msg_bufs; 1471 while (maxlen > 0) { 1472 len = min(end - beg, maxlen); 1473 if (len == 0) 1474 break; 1475 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1476 if (error) 1477 break; 1478 where += len; 1479 maxlen -= len; 1480 1481 /* 1482 * ... then, copy from the beginning of message buffer to 1483 * the write pointer. 1484 */ 1485 beg = 0; 1486 end = msgbufp->msg_bufx; 1487 } 1488 return (error); 1489 } 1490 1491 /* 1492 * try over estimating by 5 procs 1493 */ 1494 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1495 1496 static int 1497 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1498 { 1499 struct eproc eproc; 1500 struct kinfo_proc2 kproc2; 1501 struct kinfo_proc *dp; 1502 struct proc *p; 1503 const struct proclist_desc *pd; 1504 char *where, *dp2; 1505 int type, op, arg; 1506 u_int elem_size, elem_count; 1507 size_t buflen, needed; 1508 int error; 1509 1510 dp = vwhere; 1511 dp2 = where = vwhere; 1512 buflen = where != NULL ? *sizep : 0; 1513 error = 0; 1514 needed = 0; 1515 type = name[0]; 1516 1517 if (type == KERN_PROC) { 1518 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1519 return (EINVAL); 1520 op = name[1]; 1521 if (op != KERN_PROC_ALL) 1522 arg = name[2]; 1523 else 1524 arg = 0; /* Quell compiler warning */ 1525 elem_size = elem_count = 0; /* Ditto */ 1526 } else { 1527 if (namelen != 5) 1528 return (EINVAL); 1529 op = name[1]; 1530 arg = name[2]; 1531 elem_size = name[3]; 1532 elem_count = name[4]; 1533 } 1534 1535 proclist_lock_read(); 1536 1537 pd = proclists; 1538 again: 1539 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1540 /* 1541 * Skip embryonic processes. 1542 */ 1543 if (p->p_stat == SIDL) 1544 continue; 1545 /* 1546 * TODO - make more efficient (see notes below). 1547 * do by session. 1548 */ 1549 switch (op) { 1550 1551 case KERN_PROC_PID: 1552 /* could do this with just a lookup */ 1553 if (p->p_pid != (pid_t)arg) 1554 continue; 1555 break; 1556 1557 case KERN_PROC_PGRP: 1558 /* could do this by traversing pgrp */ 1559 if (p->p_pgrp->pg_id != (pid_t)arg) 1560 continue; 1561 break; 1562 1563 case KERN_PROC_SESSION: 1564 if (p->p_session->s_sid != (pid_t)arg) 1565 continue; 1566 break; 1567 1568 case KERN_PROC_TTY: 1569 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1570 if ((p->p_flag & P_CONTROLT) == 0 || 1571 p->p_session->s_ttyp == NULL || 1572 p->p_session->s_ttyvp != NULL) 1573 continue; 1574 } else if ((p->p_flag & P_CONTROLT) == 0 || 1575 p->p_session->s_ttyp == NULL) { 1576 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1577 continue; 1578 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1579 continue; 1580 break; 1581 1582 case KERN_PROC_UID: 1583 if (p->p_ucred->cr_uid != (uid_t)arg) 1584 continue; 1585 break; 1586 1587 case KERN_PROC_RUID: 1588 if (p->p_cred->p_ruid != (uid_t)arg) 1589 continue; 1590 break; 1591 1592 case KERN_PROC_GID: 1593 if (p->p_ucred->cr_gid != (uid_t)arg) 1594 continue; 1595 break; 1596 1597 case KERN_PROC_RGID: 1598 if (p->p_cred->p_rgid != (uid_t)arg) 1599 continue; 1600 break; 1601 1602 case KERN_PROC_ALL: 1603 /* allow everything */ 1604 break; 1605 1606 default: 1607 error = EINVAL; 1608 goto cleanup; 1609 } 1610 if (type == KERN_PROC) { 1611 if (buflen >= sizeof(struct kinfo_proc)) { 1612 fill_eproc(p, &eproc); 1613 error = copyout((caddr_t)p, &dp->kp_proc, 1614 sizeof(struct proc)); 1615 if (error) 1616 goto cleanup; 1617 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1618 sizeof(eproc)); 1619 if (error) 1620 goto cleanup; 1621 dp++; 1622 buflen -= sizeof(struct kinfo_proc); 1623 } 1624 needed += sizeof(struct kinfo_proc); 1625 } else { /* KERN_PROC2 */ 1626 if (buflen >= elem_size && elem_count > 0) { 1627 fill_kproc2(p, &kproc2); 1628 /* 1629 * Copy out elem_size, but not larger than 1630 * the size of a struct kinfo_proc2. 1631 */ 1632 error = copyout(&kproc2, dp2, 1633 min(sizeof(kproc2), elem_size)); 1634 if (error) 1635 goto cleanup; 1636 dp2 += elem_size; 1637 buflen -= elem_size; 1638 elem_count--; 1639 } 1640 needed += elem_size; 1641 } 1642 } 1643 pd++; 1644 if (pd->pd_list != NULL) 1645 goto again; 1646 proclist_unlock_read(); 1647 1648 if (where != NULL) { 1649 if (type == KERN_PROC) 1650 *sizep = (caddr_t)dp - where; 1651 else 1652 *sizep = dp2 - where; 1653 if (needed > *sizep) 1654 return (ENOMEM); 1655 } else { 1656 needed += KERN_PROCSLOP; 1657 *sizep = needed; 1658 } 1659 return (0); 1660 cleanup: 1661 proclist_unlock_read(); 1662 return (error); 1663 } 1664 1665 1666 /* 1667 * try over estimating by 5 LWPs 1668 */ 1669 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1670 1671 static int 1672 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1673 { 1674 struct kinfo_lwp klwp; 1675 struct proc *p; 1676 struct lwp *l; 1677 char *where, *dp; 1678 int type, pid, elem_size, elem_count; 1679 int buflen, needed, error; 1680 1681 dp = where = vwhere; 1682 buflen = where != NULL ? *sizep : 0; 1683 error = needed = 0; 1684 type = name[0]; 1685 1686 if (namelen != 4) 1687 return (EINVAL); 1688 pid = name[1]; 1689 elem_size = name[2]; 1690 elem_count = name[3]; 1691 1692 p = pfind(pid); 1693 if (p == NULL) 1694 return (ESRCH); 1695 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1696 if (buflen >= elem_size && elem_count > 0) { 1697 fill_lwp(l, &klwp); 1698 /* 1699 * Copy out elem_size, but not larger than 1700 * the size of a struct kinfo_proc2. 1701 */ 1702 error = copyout(&klwp, dp, 1703 min(sizeof(klwp), elem_size)); 1704 if (error) 1705 goto cleanup; 1706 dp += elem_size; 1707 buflen -= elem_size; 1708 elem_count--; 1709 } 1710 needed += elem_size; 1711 } 1712 1713 if (where != NULL) { 1714 *sizep = dp - where; 1715 if (needed > *sizep) 1716 return (ENOMEM); 1717 } else { 1718 needed += KERN_PROCSLOP; 1719 *sizep = needed; 1720 } 1721 return (0); 1722 cleanup: 1723 return (error); 1724 } 1725 1726 /* 1727 * Fill in an eproc structure for the specified process. 1728 */ 1729 void 1730 fill_eproc(struct proc *p, struct eproc *ep) 1731 { 1732 struct tty *tp; 1733 struct lwp *l; 1734 1735 ep->e_paddr = p; 1736 ep->e_sess = p->p_session; 1737 ep->e_pcred = *p->p_cred; 1738 ep->e_ucred = *p->p_ucred; 1739 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1740 ep->e_vm.vm_rssize = 0; 1741 ep->e_vm.vm_tsize = 0; 1742 ep->e_vm.vm_dsize = 0; 1743 ep->e_vm.vm_ssize = 0; 1744 /* ep->e_vm.vm_pmap = XXX; */ 1745 } else { 1746 struct vmspace *vm = p->p_vmspace; 1747 1748 ep->e_vm.vm_rssize = vm_resident_count(vm); 1749 ep->e_vm.vm_tsize = vm->vm_tsize; 1750 ep->e_vm.vm_dsize = vm->vm_dsize; 1751 ep->e_vm.vm_ssize = vm->vm_ssize; 1752 1753 /* Pick a "representative" LWP */ 1754 l = proc_representative_lwp(p); 1755 1756 if (l->l_wmesg) 1757 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1758 } 1759 if (p->p_pptr) 1760 ep->e_ppid = p->p_pptr->p_pid; 1761 else 1762 ep->e_ppid = 0; 1763 ep->e_pgid = p->p_pgrp->pg_id; 1764 ep->e_sid = ep->e_sess->s_sid; 1765 ep->e_jobc = p->p_pgrp->pg_jobc; 1766 if ((p->p_flag & P_CONTROLT) && 1767 (tp = ep->e_sess->s_ttyp)) { 1768 ep->e_tdev = tp->t_dev; 1769 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1770 ep->e_tsess = tp->t_session; 1771 } else 1772 ep->e_tdev = NODEV; 1773 1774 ep->e_xsize = ep->e_xrssize = 0; 1775 ep->e_xccount = ep->e_xswrss = 0; 1776 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1777 if (SESS_LEADER(p)) 1778 ep->e_flag |= EPROC_SLEADER; 1779 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1780 } 1781 1782 /* 1783 * Fill in an eproc structure for the specified process. 1784 */ 1785 static void 1786 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1787 { 1788 struct tty *tp; 1789 struct lwp *l; 1790 memset(ki, 0, sizeof(*ki)); 1791 1792 ki->p_paddr = PTRTOINT64(p); 1793 ki->p_fd = PTRTOINT64(p->p_fd); 1794 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1795 ki->p_stats = PTRTOINT64(p->p_stats); 1796 ki->p_limit = PTRTOINT64(p->p_limit); 1797 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1798 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1799 ki->p_sess = PTRTOINT64(p->p_session); 1800 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1801 ki->p_ru = PTRTOINT64(p->p_ru); 1802 1803 ki->p_eflag = 0; 1804 ki->p_exitsig = p->p_exitsig; 1805 ki->p_flag = p->p_flag; 1806 1807 ki->p_pid = p->p_pid; 1808 if (p->p_pptr) 1809 ki->p_ppid = p->p_pptr->p_pid; 1810 else 1811 ki->p_ppid = 0; 1812 ki->p_sid = p->p_session->s_sid; 1813 ki->p__pgid = p->p_pgrp->pg_id; 1814 1815 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1816 1817 ki->p_uid = p->p_ucred->cr_uid; 1818 ki->p_ruid = p->p_cred->p_ruid; 1819 ki->p_gid = p->p_ucred->cr_gid; 1820 ki->p_rgid = p->p_cred->p_rgid; 1821 1822 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1823 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1824 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1825 1826 ki->p_jobc = p->p_pgrp->pg_jobc; 1827 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1828 ki->p_tdev = tp->t_dev; 1829 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1830 ki->p_tsess = PTRTOINT64(tp->t_session); 1831 } else { 1832 ki->p_tdev = NODEV; 1833 } 1834 1835 ki->p_estcpu = p->p_estcpu; 1836 ki->p_rtime_sec = p->p_rtime.tv_sec; 1837 ki->p_rtime_usec = p->p_rtime.tv_usec; 1838 ki->p_cpticks = p->p_cpticks; 1839 ki->p_pctcpu = p->p_pctcpu; 1840 1841 ki->p_uticks = p->p_uticks; 1842 ki->p_sticks = p->p_sticks; 1843 ki->p_iticks = p->p_iticks; 1844 1845 ki->p_tracep = PTRTOINT64(p->p_tracep); 1846 ki->p_traceflag = p->p_traceflag; 1847 1848 1849 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1850 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1851 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1852 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1853 1854 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1855 ki->p_realstat = p->p_stat; 1856 ki->p_nice = p->p_nice; 1857 1858 ki->p_xstat = p->p_xstat; 1859 ki->p_acflag = p->p_acflag; 1860 1861 strncpy(ki->p_comm, p->p_comm, 1862 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1863 1864 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1865 1866 ki->p_nlwps = p->p_nlwps; 1867 ki->p_nrlwps = p->p_nrlwps; 1868 ki->p_realflag = p->p_flag; 1869 1870 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1871 ki->p_vm_rssize = 0; 1872 ki->p_vm_tsize = 0; 1873 ki->p_vm_dsize = 0; 1874 ki->p_vm_ssize = 0; 1875 l = NULL; 1876 } else { 1877 struct vmspace *vm = p->p_vmspace; 1878 1879 ki->p_vm_rssize = vm_resident_count(vm); 1880 ki->p_vm_tsize = vm->vm_tsize; 1881 ki->p_vm_dsize = vm->vm_dsize; 1882 ki->p_vm_ssize = vm->vm_ssize; 1883 1884 /* Pick a "representative" LWP */ 1885 l = proc_representative_lwp(p); 1886 ki->p_forw = PTRTOINT64(l->l_forw); 1887 ki->p_back = PTRTOINT64(l->l_back); 1888 ki->p_addr = PTRTOINT64(l->l_addr); 1889 ki->p_stat = l->l_stat; 1890 ki->p_flag |= l->l_flag; 1891 ki->p_swtime = l->l_swtime; 1892 ki->p_slptime = l->l_slptime; 1893 if (l->l_stat == LSONPROC) { 1894 KDASSERT(l->l_cpu != NULL); 1895 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1896 } else 1897 ki->p_schedflags = 0; 1898 ki->p_holdcnt = l->l_holdcnt; 1899 ki->p_priority = l->l_priority; 1900 ki->p_usrpri = l->l_usrpri; 1901 if (l->l_wmesg) 1902 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1903 ki->p_wchan = PTRTOINT64(l->l_wchan); 1904 1905 } 1906 1907 if (p->p_session->s_ttyvp) 1908 ki->p_eflag |= EPROC_CTTY; 1909 if (SESS_LEADER(p)) 1910 ki->p_eflag |= EPROC_SLEADER; 1911 1912 /* XXX Is this double check necessary? */ 1913 if (P_ZOMBIE(p)) { 1914 ki->p_uvalid = 0; 1915 } else { 1916 ki->p_uvalid = 1; 1917 1918 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1919 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1920 1921 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1922 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1923 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1924 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1925 1926 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1927 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1928 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1929 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1930 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1931 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1932 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1933 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1934 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1935 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1936 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1937 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1938 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1939 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1940 1941 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1942 p->p_stats->p_cru.ru_stime.tv_sec; 1943 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1944 p->p_stats->p_cru.ru_stime.tv_usec; 1945 } 1946 #ifdef MULTIPROCESSOR 1947 if (l && l->l_cpu != NULL) 1948 ki->p_cpuid = l->l_cpu->ci_cpuid; 1949 else 1950 #endif 1951 ki->p_cpuid = KI_NOCPU; 1952 1953 } 1954 1955 /* 1956 * Fill in a kinfo_lwp structure for the specified lwp. 1957 */ 1958 static void 1959 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1960 { 1961 kl->l_forw = PTRTOINT64(l->l_forw); 1962 kl->l_back = PTRTOINT64(l->l_back); 1963 kl->l_laddr = PTRTOINT64(l); 1964 kl->l_addr = PTRTOINT64(l->l_addr); 1965 kl->l_stat = l->l_stat; 1966 kl->l_lid = l->l_lid; 1967 kl->l_flag = l->l_flag; 1968 1969 kl->l_swtime = l->l_swtime; 1970 kl->l_slptime = l->l_slptime; 1971 if (l->l_stat == LSONPROC) { 1972 KDASSERT(l->l_cpu != NULL); 1973 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1974 } else 1975 kl->l_schedflags = 0; 1976 kl->l_holdcnt = l->l_holdcnt; 1977 kl->l_priority = l->l_priority; 1978 kl->l_usrpri = l->l_usrpri; 1979 if (l->l_wmesg) 1980 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1981 kl->l_wchan = PTRTOINT64(l->l_wchan); 1982 #ifdef MULTIPROCESSOR 1983 if (l->l_cpu != NULL) 1984 kl->l_cpuid = l->l_cpu->ci_cpuid; 1985 else 1986 #endif 1987 kl->l_cpuid = KI_NOCPU; 1988 } 1989 1990 int 1991 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1992 struct proc *up) 1993 { 1994 struct ps_strings pss; 1995 struct proc *p; 1996 size_t len, upper_bound, xlen, i; 1997 struct uio auio; 1998 struct iovec aiov; 1999 vaddr_t argv; 2000 pid_t pid; 2001 int nargv, type, error; 2002 char *arg; 2003 char *tmp; 2004 2005 if (namelen != 2) 2006 return (EINVAL); 2007 pid = name[0]; 2008 type = name[1]; 2009 2010 switch (type) { 2011 case KERN_PROC_ARGV: 2012 case KERN_PROC_NARGV: 2013 case KERN_PROC_ENV: 2014 case KERN_PROC_NENV: 2015 /* ok */ 2016 break; 2017 default: 2018 return (EINVAL); 2019 } 2020 2021 /* check pid */ 2022 if ((p = pfind(pid)) == NULL) 2023 return (EINVAL); 2024 2025 /* only root or same user change look at the environment */ 2026 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 2027 if (up->p_ucred->cr_uid != 0) { 2028 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 2029 up->p_cred->p_ruid != p->p_cred->p_svuid) 2030 return (EPERM); 2031 } 2032 } 2033 2034 if (sizep != NULL && where == NULL) { 2035 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 2036 *sizep = sizeof (int); 2037 else 2038 *sizep = ARG_MAX; /* XXX XXX XXX */ 2039 return (0); 2040 } 2041 if (where == NULL || sizep == NULL) 2042 return (EINVAL); 2043 2044 /* 2045 * Zombies don't have a stack, so we can't read their psstrings. 2046 * System processes also don't have a user stack. 2047 */ 2048 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 2049 return (EINVAL); 2050 2051 /* 2052 * Lock the process down in memory. 2053 */ 2054 /* XXXCDC: how should locking work here? */ 2055 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 2056 return (EFAULT); 2057 2058 p->p_vmspace->vm_refcnt++; /* XXX */ 2059 2060 /* 2061 * Allocate a temporary buffer to hold the arguments. 2062 */ 2063 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2064 2065 /* 2066 * Read in the ps_strings structure. 2067 */ 2068 aiov.iov_base = &pss; 2069 aiov.iov_len = sizeof(pss); 2070 auio.uio_iov = &aiov; 2071 auio.uio_iovcnt = 1; 2072 auio.uio_offset = (vaddr_t)p->p_psstr; 2073 auio.uio_resid = sizeof(pss); 2074 auio.uio_segflg = UIO_SYSSPACE; 2075 auio.uio_rw = UIO_READ; 2076 auio.uio_procp = NULL; 2077 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2078 if (error) 2079 goto done; 2080 2081 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2082 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2083 else 2084 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2085 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2086 error = copyout(&nargv, where, sizeof(nargv)); 2087 *sizep = sizeof(nargv); 2088 goto done; 2089 } 2090 /* 2091 * Now read the address of the argument vector. 2092 */ 2093 switch (type) { 2094 case KERN_PROC_ARGV: 2095 /* XXX compat32 stuff here */ 2096 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2097 break; 2098 case KERN_PROC_ENV: 2099 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2100 break; 2101 default: 2102 return (EINVAL); 2103 } 2104 auio.uio_offset = (off_t)(long)tmp; 2105 aiov.iov_base = &argv; 2106 aiov.iov_len = sizeof(argv); 2107 auio.uio_iov = &aiov; 2108 auio.uio_iovcnt = 1; 2109 auio.uio_resid = sizeof(argv); 2110 auio.uio_segflg = UIO_SYSSPACE; 2111 auio.uio_rw = UIO_READ; 2112 auio.uio_procp = NULL; 2113 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2114 if (error) 2115 goto done; 2116 2117 /* 2118 * Now copy in the actual argument vector, one page at a time, 2119 * since we don't know how long the vector is (though, we do 2120 * know how many NUL-terminated strings are in the vector). 2121 */ 2122 len = 0; 2123 upper_bound = *sizep; 2124 for (; nargv != 0 && len < upper_bound; len += xlen) { 2125 aiov.iov_base = arg; 2126 aiov.iov_len = PAGE_SIZE; 2127 auio.uio_iov = &aiov; 2128 auio.uio_iovcnt = 1; 2129 auio.uio_offset = argv + len; 2130 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2131 auio.uio_resid = xlen; 2132 auio.uio_segflg = UIO_SYSSPACE; 2133 auio.uio_rw = UIO_READ; 2134 auio.uio_procp = NULL; 2135 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2136 if (error) 2137 goto done; 2138 2139 for (i = 0; i < xlen && nargv != 0; i++) { 2140 if (arg[i] == '\0') 2141 nargv--; /* one full string */ 2142 } 2143 2144 /* 2145 * Make sure we don't copyout past the end of the user's 2146 * buffer. 2147 */ 2148 if (len + i > upper_bound) 2149 i = upper_bound - len; 2150 2151 error = copyout(arg, (char *)where + len, i); 2152 if (error) 2153 break; 2154 2155 if (nargv == 0) { 2156 len += i; 2157 break; 2158 } 2159 } 2160 *sizep = len; 2161 2162 done: 2163 uvmspace_free(p->p_vmspace); 2164 2165 free(arg, M_TEMP); 2166 return (error); 2167 } 2168 2169 #if NPTY > 0 2170 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2171 2172 /* 2173 * Validate parameters and get old / set new parameters 2174 * for pty sysctl function. 2175 */ 2176 static int 2177 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2178 { 2179 int error = 0; 2180 int oldmax = 0, newmax = 0; 2181 2182 /* get current value of maxptys */ 2183 oldmax = pty_maxptys(0, 0); 2184 2185 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2186 2187 if (!error && newp) { 2188 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2189 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2190 2191 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2192 return (EINVAL); 2193 2194 } 2195 2196 return (error); 2197 } 2198 #endif /* NPTY > 0 */ 2199 2200 static int 2201 sysctl_dotkstat(name, namelen, where, sizep, newp) 2202 int *name; 2203 u_int namelen; 2204 void *where; 2205 size_t *sizep; 2206 void *newp; 2207 { 2208 /* all sysctl names at this level are terminal */ 2209 if (namelen != 1) 2210 return (ENOTDIR); /* overloaded */ 2211 2212 switch (name[0]) { 2213 case KERN_TKSTAT_NIN: 2214 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2215 case KERN_TKSTAT_NOUT: 2216 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2217 case KERN_TKSTAT_CANCC: 2218 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2219 case KERN_TKSTAT_RAWCC: 2220 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2221 default: 2222 return (EOPNOTSUPP); 2223 } 2224 } 2225
Indexes created Mon Sep 22 05:09:51 GMT 2025