kern_sysctl.c revision 1.134
1 /* $NetBSD: kern_sysctl.c,v 1.134 2003/06/23 11:02:05 martin 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 1.134 2003/06/23 11:02:05 martin Exp $"); 47 48 #include "opt_ddb.h" 49 #include "opt_insecure.h" 50 #include "opt_defcorename.h" 51 #include "opt_multiprocessor.h" 52 #include "opt_pipe.h" 53 #include "opt_sysv.h" 54 #include "pty.h" 55 #include "rnd.h" 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/kernel.h> 60 #include <sys/buf.h> 61 #include <sys/device.h> 62 #include <sys/disklabel.h> 63 #include <sys/dkstat.h> 64 #include <sys/exec.h> 65 #include <sys/file.h> 66 #include <sys/ioctl.h> 67 #include <sys/malloc.h> 68 #include <sys/mount.h> 69 #include <sys/msgbuf.h> 70 #include <sys/pool.h> 71 #include <sys/proc.h> 72 #include <sys/resource.h> 73 #include <sys/resourcevar.h> 74 #include <sys/sa.h> 75 #include <sys/syscallargs.h> 76 #include <sys/tty.h> 77 #include <sys/unistd.h> 78 #include <sys/vnode.h> 79 #include <sys/socketvar.h> 80 #define __SYSCTL_PRIVATE 81 #include <sys/sysctl.h> 82 #include <sys/lock.h> 83 #include <sys/namei.h> 84 85 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 86 #include <sys/ipc.h> 87 #endif 88 #ifdef SYSVMSG 89 #include <sys/msg.h> 90 #endif 91 #ifdef SYSVSEM 92 #include <sys/sem.h> 93 #endif 94 #ifdef SYSVSHM 95 #include <sys/shm.h> 96 #endif 97 98 #include <dev/cons.h> 99 100 #if defined(DDB) 101 #include <ddb/ddbvar.h> 102 #endif 103 104 #ifndef PIPE_SOCKETPAIR 105 #include <sys/pipe.h> 106 #endif 107 108 #if NRND > 0 109 #include <sys/rnd.h> 110 #endif 111 112 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 113 114 static int sysctl_file(void *, size_t *); 115 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 116 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 117 #endif 118 static int sysctl_msgbuf(void *, size_t *); 119 static int sysctl_doeproc(int *, u_int, void *, size_t *); 120 static int sysctl_dolwp(int *, u_int, void *, size_t *); 121 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 122 #ifdef MULTIPROCESSOR 123 static int sysctl_docptime(void *, size_t *, void *); 124 static int sysctl_ncpus(void); 125 #endif 126 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 127 static void fill_lwp(struct lwp *, struct kinfo_lwp *); 128 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 129 #if NPTY > 0 130 static int sysctl_pty(void *, size_t *, void *, size_t); 131 #endif 132 133 /* 134 * The `sysctl_memlock' is intended to keep too many processes from 135 * locking down memory by doing sysctls at once. Whether or not this 136 * is really a good idea to worry about it probably a subject of some 137 * debate. 138 */ 139 struct lock sysctl_memlock; 140 141 void 142 sysctl_init(void) 143 { 144 145 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 146 } 147 148 int 149 sys___sysctl(struct lwp *l, void *v, register_t *retval) 150 { 151 struct sys___sysctl_args /* { 152 syscallarg(int *) name; 153 syscallarg(u_int) namelen; 154 syscallarg(void *) old; 155 syscallarg(size_t *) oldlenp; 156 syscallarg(void *) new; 157 syscallarg(size_t) newlen; 158 } */ *uap = v; 159 struct proc *p = l->l_proc; 160 int error; 161 size_t savelen = 0, oldlen = 0; 162 sysctlfn *fn; 163 int name[CTL_MAXNAME]; 164 size_t *oldlenp; 165 166 /* 167 * all top-level sysctl names are non-terminal 168 */ 169 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 170 return (EINVAL); 171 error = copyin(SCARG(uap, name), &name, 172 SCARG(uap, namelen) * sizeof(int)); 173 if (error) 174 return (error); 175 176 /* 177 * For all but CTL_PROC, must be root to change a value. 178 * For CTL_PROC, must be root, or owner of the proc (and not suid), 179 * this is checked in proc_sysctl() (once we know the targer proc). 180 */ 181 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 182 (error = suser(p->p_ucred, &p->p_acflag))) 183 return (error); 184 185 switch (name[0]) { 186 case CTL_KERN: 187 fn = kern_sysctl; 188 break; 189 case CTL_HW: 190 fn = hw_sysctl; 191 break; 192 case CTL_VM: 193 fn = uvm_sysctl; 194 break; 195 case CTL_NET: 196 fn = net_sysctl; 197 break; 198 case CTL_VFS: 199 fn = vfs_sysctl; 200 break; 201 case CTL_MACHDEP: 202 fn = cpu_sysctl; 203 break; 204 #ifdef DEBUG 205 case CTL_DEBUG: 206 fn = debug_sysctl; 207 break; 208 #endif 209 #ifdef DDB 210 case CTL_DDB: 211 fn = ddb_sysctl; 212 break; 213 #endif 214 case CTL_PROC: 215 fn = proc_sysctl; 216 break; 217 218 case CTL_EMUL: 219 fn = emul_sysctl; 220 break; 221 default: 222 return (EOPNOTSUPP); 223 } 224 225 /* 226 * XXX Hey, we wire `old', but what about `new'? 227 */ 228 229 oldlenp = SCARG(uap, oldlenp); 230 if (oldlenp) { 231 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 232 return (error); 233 oldlenp = &oldlen; 234 } 235 if (SCARG(uap, old) != NULL) { 236 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 237 if (error) 238 return (error); 239 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 240 if (error) { 241 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 242 return (error); 243 } 244 savelen = oldlen; 245 } 246 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 247 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 248 if (SCARG(uap, old) != NULL) { 249 uvm_vsunlock(p, SCARG(uap, old), savelen); 250 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 251 } 252 if (error) 253 return (error); 254 if (SCARG(uap, oldlenp)) 255 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 256 return (error); 257 } 258 259 /* 260 * Attributes stored in the kernel. 261 */ 262 char hostname[MAXHOSTNAMELEN]; 263 int hostnamelen; 264 265 char domainname[MAXHOSTNAMELEN]; 266 int domainnamelen; 267 268 long hostid; 269 270 #ifdef INSECURE 271 int securelevel = -1; 272 #else 273 int securelevel = 0; 274 #endif 275 276 #ifndef DEFCORENAME 277 #define DEFCORENAME "%n.core" 278 #endif 279 char defcorename[MAXPATHLEN] = DEFCORENAME; 280 int defcorenamelen = sizeof(DEFCORENAME); 281 282 extern int kern_logsigexit; 283 extern fixpt_t ccpu; 284 extern int forkfsleep; 285 extern int dumponpanic; 286 287 #ifndef MULTIPROCESSOR 288 #define sysctl_ncpus() 1 289 #endif 290 291 #ifdef MULTIPROCESSOR 292 293 #ifndef CPU_INFO_FOREACH 294 #define CPU_INFO_ITERATOR int 295 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 296 #endif 297 298 static int 299 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 300 { 301 u_int64_t cp_time[CPUSTATES]; 302 int i; 303 struct cpu_info *ci; 304 CPU_INFO_ITERATOR cii; 305 306 for (i = 0; i < CPUSTATES; i++) 307 cp_time[i] = 0; 308 309 for (CPU_INFO_FOREACH(cii, ci)) { 310 for (i = 0; i < CPUSTATES; i++) 311 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 312 } 313 return (sysctl_rdstruct(oldp, oldlenp, newp, 314 cp_time, sizeof(cp_time))); 315 } 316 317 static int 318 sysctl_ncpus(void) 319 { 320 struct cpu_info *ci; 321 CPU_INFO_ITERATOR cii; 322 323 int ncpus = 0; 324 for (CPU_INFO_FOREACH(cii, ci)) 325 ncpus++; 326 return (ncpus); 327 } 328 329 #endif 330 331 /* 332 * kernel related system variables. 333 */ 334 int 335 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 336 void *newp, size_t newlen, struct proc *p) 337 { 338 int error, level, inthostid; 339 int old_autonicetime; 340 int old_vnodes; 341 dev_t consdev; 342 #if NRND > 0 343 int v; 344 #endif 345 346 /* All sysctl names at this level, except for a few, are terminal. */ 347 switch (name[0]) { 348 case KERN_PROC: 349 case KERN_PROC2: 350 case KERN_LWP: 351 case KERN_PROF: 352 case KERN_MBUF: 353 case KERN_PROC_ARGS: 354 case KERN_SYSVIPC_INFO: 355 case KERN_PIPE: 356 case KERN_TKSTAT: 357 /* Not terminal. */ 358 break; 359 default: 360 if (namelen != 1) 361 return (ENOTDIR); /* overloaded */ 362 } 363 364 switch (name[0]) { 365 case KERN_OSTYPE: 366 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 367 case KERN_OSRELEASE: 368 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 369 case KERN_OSREV: 370 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 371 case KERN_VERSION: 372 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 373 case KERN_MAXVNODES: 374 old_vnodes = desiredvnodes; 375 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 376 if (newp && !error) { 377 if (old_vnodes > desiredvnodes) { 378 desiredvnodes = old_vnodes; 379 return (EINVAL); 380 } 381 vfs_reinit(); 382 nchreinit(); 383 } 384 return (error); 385 case KERN_MAXPROC: 386 { 387 int nmaxproc = maxproc; 388 389 error = sysctl_int(oldp, oldlenp, newp, newlen, &nmaxproc); 390 391 if (!error && newp) { 392 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 393 return (EINVAL); 394 395 #ifdef __HAVE_CPU_MAXPROC 396 if (nmaxproc > cpu_maxproc()) 397 return (EINVAL); 398 #endif 399 maxproc = nmaxproc; 400 } 401 402 return (error); 403 } 404 case KERN_MAXFILES: 405 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 406 case KERN_ARGMAX: 407 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 408 case KERN_SECURELVL: 409 level = securelevel; 410 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 411 newp == NULL) 412 return (error); 413 if (level < securelevel && p->p_pid != 1) 414 return (EPERM); 415 securelevel = level; 416 return (0); 417 case KERN_HOSTNAME: 418 error = sysctl_string(oldp, oldlenp, newp, newlen, 419 hostname, sizeof(hostname)); 420 if (newp && !error) 421 hostnamelen = newlen; 422 return (error); 423 case KERN_DOMAINNAME: 424 error = sysctl_string(oldp, oldlenp, newp, newlen, 425 domainname, sizeof(domainname)); 426 if (newp && !error) 427 domainnamelen = newlen; 428 return (error); 429 case KERN_HOSTID: 430 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 431 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 432 if (newp && !error) 433 hostid = inthostid; 434 return (error); 435 case KERN_CLOCKRATE: 436 return (sysctl_clockrate(oldp, oldlenp)); 437 case KERN_BOOTTIME: 438 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 439 sizeof(struct timeval))); 440 case KERN_VNODE: 441 return (sysctl_vnode(oldp, oldlenp, p)); 442 case KERN_PROC: 443 case KERN_PROC2: 444 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 445 case KERN_LWP: 446 return (sysctl_dolwp(name, namelen, oldp, oldlenp)); 447 case KERN_PROC_ARGS: 448 return (sysctl_procargs(name + 1, namelen - 1, 449 oldp, oldlenp, p)); 450 case KERN_FILE: 451 return (sysctl_file(oldp, oldlenp)); 452 #ifdef GPROF 453 case KERN_PROF: 454 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 455 newp, newlen)); 456 #endif 457 case KERN_POSIX1: 458 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 459 case KERN_NGROUPS: 460 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 461 case KERN_JOB_CONTROL: 462 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 463 case KERN_SAVED_IDS: 464 #ifdef _POSIX_SAVED_IDS 465 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 466 #else 467 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 468 #endif 469 case KERN_MAXPARTITIONS: 470 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 471 case KERN_RAWPARTITION: 472 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 473 #ifdef NTP 474 case KERN_NTPTIME: 475 return (sysctl_ntptime(oldp, oldlenp)); 476 #endif 477 case KERN_AUTONICETIME: 478 old_autonicetime = autonicetime; 479 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 480 if (autonicetime < 0) 481 autonicetime = old_autonicetime; 482 return (error); 483 case KERN_AUTONICEVAL: 484 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 485 if (autoniceval < PRIO_MIN) 486 autoniceval = PRIO_MIN; 487 if (autoniceval > PRIO_MAX) 488 autoniceval = PRIO_MAX; 489 return (error); 490 case KERN_RTC_OFFSET: 491 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 492 case KERN_ROOT_DEVICE: 493 return (sysctl_rdstring(oldp, oldlenp, newp, 494 root_device->dv_xname)); 495 case KERN_MSGBUFSIZE: 496 /* 497 * deal with cases where the message buffer has 498 * become corrupted. 499 */ 500 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 501 msgbufenabled = 0; 502 return (ENXIO); 503 } 504 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 505 case KERN_FSYNC: 506 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 507 case KERN_SYSVMSG: 508 #ifdef SYSVMSG 509 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 510 #else 511 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 512 #endif 513 case KERN_SYSVSEM: 514 #ifdef SYSVSEM 515 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 516 #else 517 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 518 #endif 519 case KERN_SYSVSHM: 520 #ifdef SYSVSHM 521 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 522 #else 523 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 524 #endif 525 case KERN_DEFCORENAME: 526 if (newp && newlen < 1) 527 return (EINVAL); 528 error = sysctl_string(oldp, oldlenp, newp, newlen, 529 defcorename, sizeof(defcorename)); 530 if (newp && !error) 531 defcorenamelen = newlen; 532 return (error); 533 case KERN_SYNCHRONIZED_IO: 534 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 535 case KERN_IOV_MAX: 536 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 537 case KERN_MBUF: 538 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 539 newp, newlen)); 540 case KERN_MAPPED_FILES: 541 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 542 case KERN_MEMLOCK: 543 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 544 case KERN_MEMLOCK_RANGE: 545 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 546 case KERN_MEMORY_PROTECTION: 547 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 548 case KERN_LOGIN_NAME_MAX: 549 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 550 case KERN_LOGSIGEXIT: 551 return (sysctl_int(oldp, oldlenp, newp, newlen, 552 &kern_logsigexit)); 553 case KERN_FSCALE: 554 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 555 case KERN_CCPU: 556 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 557 case KERN_CP_TIME: 558 #ifndef MULTIPROCESSOR 559 return (sysctl_rdstruct(oldp, oldlenp, newp, 560 curcpu()->ci_schedstate.spc_cp_time, 561 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 562 #else 563 return (sysctl_docptime(oldp, oldlenp, newp)); 564 #endif 565 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 566 case KERN_SYSVIPC_INFO: 567 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 568 #endif 569 case KERN_MSGBUF: 570 return (sysctl_msgbuf(oldp, oldlenp)); 571 case KERN_CONSDEV: 572 if (cn_tab != NULL) 573 consdev = cn_tab->cn_dev; 574 else 575 consdev = NODEV; 576 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 577 sizeof consdev)); 578 #if NPTY > 0 579 case KERN_MAXPTYS: 580 return (sysctl_pty(oldp, oldlenp, newp, newlen)); 581 #endif 582 #ifndef PIPE_SOCKETPAIR 583 case KERN_PIPE: 584 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 585 newp, newlen)); 586 #endif 587 case KERN_MAXPHYS: 588 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 589 case KERN_SBMAX: 590 { 591 int new_sbmax = sb_max; 592 593 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 594 if (newp && !error) { 595 if (new_sbmax < (16 * 1024)) /* sanity */ 596 return (EINVAL); 597 sb_max = new_sbmax; 598 } 599 return (error); 600 } 601 case KERN_TKSTAT: 602 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 603 newp)); 604 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 605 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 606 case KERN_URND: 607 #if NRND > 0 608 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 609 sizeof(v)) 610 return (sysctl_rdint(oldp, oldlenp, newp, v)); 611 else 612 return (EIO); /*XXX*/ 613 #else 614 return (EOPNOTSUPP); 615 #endif 616 case KERN_LABELSECTOR: 617 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 618 case KERN_LABELOFFSET: 619 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 620 case KERN_FORKFSLEEP: 621 { 622 /* userland sees value in ms, internally is in ticks */ 623 int timo, lsleep = forkfsleep * 1000 / hz; 624 625 error = sysctl_int(oldp, oldlenp, newp, newlen, &lsleep); 626 if (newp && !error) { 627 /* refuse negative values, and overly 'long time' */ 628 if (lsleep < 0 || lsleep > MAXSLP * 1000) 629 return (EINVAL); 630 631 timo = mstohz(lsleep); 632 633 /* if the interval is >0 ms && <1 tick, use 1 tick */ 634 if (lsleep != 0 && timo == 0) 635 forkfsleep = 1; 636 else 637 forkfsleep = timo; 638 } 639 return (error); 640 } 641 case KERN_POSIX_THREADS: /* XXX _POSIX_VERSION */ 642 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 643 case KERN_POSIX_SEMAPHORES: /* XXX _POSIX_VERSION */ 644 #ifdef P1003_1B_SEMAPHORE 645 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 646 #else 647 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 648 #endif 649 case KERN_POSIX_BARRIERS: /* XXX _POSIX_VERSION */ 650 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 651 case KERN_POSIX_TIMERS: /* XXX _POSIX_VERSION */ 652 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 653 case KERN_POSIX_SPIN_LOCKS: /* XXX _POSIX_VERSION */ 654 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 655 case KERN_POSIX_READER_WRITER_LOCKS: /* XXX _POSIX_VERSION */ 656 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 657 case KERN_DUMP_ON_PANIC: 658 return (sysctl_int(oldp, oldlenp, newp, newlen, &dumponpanic)); 659 660 default: 661 return (EOPNOTSUPP); 662 } 663 /* NOTREACHED */ 664 } 665 666 /* 667 * hardware related system variables. 668 */ 669 int 670 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 671 void *newp, size_t newlen, struct proc *p) 672 { 673 674 /* All sysctl names at this level, except for a few, are terminal. */ 675 switch (name[0]) { 676 case HW_DISKSTATS: 677 /* Not terminal. */ 678 break; 679 default: 680 if (namelen != 1) 681 return (ENOTDIR); /* overloaded */ 682 } 683 684 switch (name[0]) { 685 case HW_MACHINE: 686 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 687 case HW_MACHINE_ARCH: 688 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 689 case HW_MODEL: 690 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 691 case HW_NCPU: 692 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 693 case HW_BYTEORDER: 694 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 695 case HW_PHYSMEM: 696 { 697 u_int rval; 698 699 if ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) 700 rval = UINT_MAX; 701 else 702 rval = physmem * PAGE_SIZE; 703 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 704 } 705 case HW_PHYSMEM64: 706 return (sysctl_rdquad(oldp, oldlenp, newp, 707 (u_quad_t)physmem * PAGE_SIZE)); 708 case HW_USERMEM: 709 { 710 u_int rval; 711 712 if ((u_int)(physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 713 rval = UINT_MAX; 714 else 715 rval = (physmem - uvmexp.wired) * PAGE_SIZE; 716 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 717 } 718 case HW_USERMEM64: 719 return (sysctl_rdquad(oldp, oldlenp, newp, 720 (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE)); 721 case HW_PAGESIZE: 722 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 723 case HW_ALIGNBYTES: 724 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 725 case HW_DISKNAMES: 726 return (sysctl_disknames(oldp, oldlenp)); 727 case HW_DISKSTATS: 728 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 729 case HW_CNMAGIC: { 730 char magic[CNS_LEN]; 731 int error; 732 733 if (oldp) 734 cn_get_magic(magic, CNS_LEN); 735 error = sysctl_string(oldp, oldlenp, newp, newlen, 736 magic, sizeof(magic)); 737 if (newp && !error) { 738 error = cn_set_magic(magic); 739 } 740 return (error); 741 } 742 default: 743 return (EOPNOTSUPP); 744 } 745 /* NOTREACHED */ 746 } 747 748 #ifdef DEBUG 749 /* 750 * Debugging related system variables. 751 */ 752 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 753 struct ctldebug debug5, debug6, debug7, debug8, debug9; 754 struct ctldebug debug10, debug11, debug12, debug13, debug14; 755 struct ctldebug debug15, debug16, debug17, debug18, debug19; 756 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 757 &debug0, &debug1, &debug2, &debug3, &debug4, 758 &debug5, &debug6, &debug7, &debug8, &debug9, 759 &debug10, &debug11, &debug12, &debug13, &debug14, 760 &debug15, &debug16, &debug17, &debug18, &debug19, 761 }; 762 763 int 764 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 765 void *newp, size_t newlen, struct proc *p) 766 { 767 struct ctldebug *cdp; 768 769 /* all sysctl names at this level are name and field */ 770 if (namelen != 2) 771 return (ENOTDIR); /* overloaded */ 772 if (name[0] >= CTL_DEBUG_MAXID) 773 return (EOPNOTSUPP); 774 cdp = debugvars[name[0]]; 775 if (cdp->debugname == 0) 776 return (EOPNOTSUPP); 777 switch (name[1]) { 778 case CTL_DEBUG_NAME: 779 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 780 case CTL_DEBUG_VALUE: 781 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 782 default: 783 return (EOPNOTSUPP); 784 } 785 /* NOTREACHED */ 786 } 787 #endif /* DEBUG */ 788 789 int 790 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 791 void *newp, size_t newlen, struct proc *p) 792 { 793 struct proc *ptmp = NULL; 794 const struct proclist_desc *pd; 795 int error = 0; 796 struct rlimit alim; 797 struct plimit *newplim; 798 char *tmps = NULL; 799 size_t len, curlen; 800 u_int i; 801 802 if (namelen < 2) 803 return (EINVAL); 804 805 if (name[0] == PROC_CURPROC) { 806 ptmp = p; 807 } else { 808 proclist_lock_read(); 809 for (pd = proclists; pd->pd_list != NULL; pd++) { 810 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 811 ptmp = LIST_NEXT(ptmp, p_list)) { 812 /* Skip embryonic processes. */ 813 if (ptmp->p_stat == SIDL) 814 continue; 815 if (ptmp->p_pid == (pid_t)name[0]) 816 break; 817 } 818 if (ptmp != NULL) 819 break; 820 } 821 proclist_unlock_read(); 822 if (ptmp == NULL) 823 return (ESRCH); 824 if (p->p_ucred->cr_uid != 0) { 825 if (p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 826 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 827 return (EPERM); 828 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 829 return (EPERM); /* sgid proc */ 830 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 831 if (p->p_ucred->cr_groups[i] == 832 ptmp->p_cred->p_rgid) 833 break; 834 } 835 if (i == p->p_ucred->cr_ngroups) 836 return (EPERM); 837 } 838 } 839 switch (name[1]) { 840 case PROC_PID_STOPFORK: 841 if (namelen != 2) 842 return (EINVAL); 843 i = ((ptmp->p_flag & P_STOPFORK) != 0); 844 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 845 return (error); 846 if (i != 0) 847 ptmp->p_flag |= P_STOPFORK; 848 else 849 ptmp->p_flag &= ~P_STOPFORK; 850 return (0); 851 break; 852 853 case PROC_PID_STOPEXEC: 854 if (namelen != 2) 855 return (EINVAL); 856 i = ((ptmp->p_flag & P_STOPEXEC) != 0); 857 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 858 return (error); 859 if (i != 0) 860 ptmp->p_flag |= P_STOPEXEC; 861 else 862 ptmp->p_flag &= ~P_STOPEXEC; 863 return (0); 864 break; 865 866 case PROC_PID_CORENAME: 867 if (namelen != 2) 868 return (EINVAL); 869 /* 870 * Can't use sysctl_string() here because we may malloc a new 871 * area during the process, so we have to do it by hand. 872 */ 873 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 874 if (oldlenp && *oldlenp < curlen) { 875 if (!oldp) 876 *oldlenp = curlen; 877 return (ENOMEM); 878 } 879 if (newp) { 880 if (securelevel > 2) 881 return (EPERM); 882 if (newlen > MAXPATHLEN) 883 return (ENAMETOOLONG); 884 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 885 if (tmps == NULL) 886 return (ENOMEM); 887 error = copyin(newp, tmps, newlen + 1); 888 tmps[newlen] = '\0'; 889 if (error) 890 goto cleanup; 891 /* Enforce to be either 'core' for end with '.core' */ 892 if (newlen < 4) { /* c.o.r.e */ 893 error = EINVAL; 894 goto cleanup; 895 } 896 len = newlen - 4; 897 if (len > 0) { 898 if (tmps[len - 1] != '.' && 899 tmps[len - 1] != '/') { 900 error = EINVAL; 901 goto cleanup; 902 } 903 } 904 if (strcmp(&tmps[len], "core") != 0) { 905 error = EINVAL; 906 goto cleanup; 907 } 908 } 909 if (oldp && oldlenp) { 910 *oldlenp = curlen; 911 error = copyout(ptmp->p_limit->pl_corename, oldp, 912 curlen); 913 } 914 if (newp && error == 0) { 915 /* if the 2 strings are identical, don't limcopy() */ 916 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 917 error = 0; 918 goto cleanup; 919 } 920 if (ptmp->p_limit->p_refcnt > 1 && 921 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 922 newplim = limcopy(ptmp->p_limit); 923 limfree(ptmp->p_limit); 924 ptmp->p_limit = newplim; 925 } 926 if (ptmp->p_limit->pl_corename != defcorename) { 927 free(ptmp->p_limit->pl_corename, M_TEMP); 928 } 929 ptmp->p_limit->pl_corename = tmps; 930 return (0); 931 } 932 cleanup: 933 if (tmps) 934 free(tmps, M_TEMP); 935 return (error); 936 break; 937 938 case PROC_PID_LIMIT: 939 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 940 return (EINVAL); 941 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 942 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 943 error = sysctl_quad(oldp, oldlenp, newp, newlen, 944 &alim.rlim_max); 945 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 946 error = sysctl_quad(oldp, oldlenp, newp, newlen, 947 &alim.rlim_cur); 948 else 949 error = (EINVAL); 950 951 if (error) 952 return (error); 953 954 if (newp) 955 error = dosetrlimit(ptmp, p->p_cred, 956 name[2] - 1, &alim); 957 return (error); 958 break; 959 960 default: 961 return (EINVAL); 962 break; 963 } 964 /* NOTREACHED */ 965 return (EINVAL); 966 } 967 968 int 969 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 970 void *newp, size_t newlen, struct proc *p) 971 { 972 static struct { 973 const char *name; 974 int type; 975 } emulations[] = CTL_EMUL_NAMES; 976 const struct emul *e; 977 const char *ename; 978 #ifdef LKM 979 extern struct lock exec_lock; /* XXX */ 980 int error; 981 #else 982 extern int nexecs_builtin; 983 extern const struct execsw execsw_builtin[]; 984 int i; 985 #endif 986 987 /* all sysctl names at this level are name and field */ 988 if (namelen < 2) 989 return (ENOTDIR); /* overloaded */ 990 991 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 992 return (EOPNOTSUPP); 993 994 ename = emulations[name[0]].name; 995 996 #ifdef LKM 997 lockmgr(&exec_lock, LK_SHARED, NULL); 998 if ((e = emul_search(ename))) { 999 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1000 newp, newlen, p); 1001 } else 1002 error = EOPNOTSUPP; 1003 lockmgr(&exec_lock, LK_RELEASE, NULL); 1004 1005 return (error); 1006 #else 1007 for (i = 0; i < nexecs_builtin; i++) { 1008 e = execsw_builtin[i].es_emul; 1009 /* 1010 * In order to match e.g. e->e_name "irix o32" 1011 * with ename "irix", we limit the comparison 1012 * to the length of ename. 1013 */ 1014 if (e == NULL || 1015 strncmp(ename, e->e_name, strlen(ename)) != 0 || 1016 e->e_sysctl == NULL) 1017 continue; 1018 1019 return ((*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1020 newp, newlen, p)); 1021 } 1022 1023 return (EOPNOTSUPP); 1024 #endif 1025 } 1026 /* 1027 * Convenience macros. 1028 */ 1029 1030 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 1031 if (oldlenp) { \ 1032 if (!oldp) \ 1033 *oldlenp = len; \ 1034 else { \ 1035 if (*oldlenp < len) \ 1036 return (ENOMEM); \ 1037 *oldlenp = len; \ 1038 error = copyout((caddr_t)valp, oldp, len); \ 1039 } \ 1040 } 1041 1042 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 1043 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 1044 1045 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 1046 if (newp && newlen != len) \ 1047 return (EINVAL); 1048 1049 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1050 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1051 1052 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1053 if (error == 0 && newp) \ 1054 error = copyin(newp, valp, len); 1055 1056 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1057 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1058 1059 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1060 if (oldlenp) { \ 1061 len = strlen(str) + 1; \ 1062 if (!oldp) \ 1063 *oldlenp = len; \ 1064 else { \ 1065 if (*oldlenp < len) { \ 1066 err2 = ENOMEM; \ 1067 len = *oldlenp; \ 1068 } else \ 1069 *oldlenp = len; \ 1070 error = copyout(str, oldp, len);\ 1071 if (error == 0) \ 1072 error = err2; \ 1073 } \ 1074 } 1075 1076 /* 1077 * Validate parameters and get old / set new parameters 1078 * for an integer-valued sysctl function. 1079 */ 1080 int 1081 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1082 { 1083 int error = 0; 1084 1085 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1086 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1087 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1088 1089 return (error); 1090 } 1091 1092 1093 /* 1094 * As above, but read-only. 1095 */ 1096 int 1097 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1098 { 1099 int error = 0; 1100 1101 if (newp) 1102 return (EPERM); 1103 1104 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1105 1106 return (error); 1107 } 1108 1109 /* 1110 * Validate parameters and get old / set new parameters 1111 * for an quad-valued sysctl function. 1112 */ 1113 int 1114 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1115 quad_t *valp) 1116 { 1117 int error = 0; 1118 1119 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1120 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1121 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1122 1123 return (error); 1124 } 1125 1126 /* 1127 * As above, but read-only. 1128 */ 1129 int 1130 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1131 { 1132 int error = 0; 1133 1134 if (newp) 1135 return (EPERM); 1136 1137 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1138 1139 return (error); 1140 } 1141 1142 /* 1143 * Validate parameters and get old / set new parameters 1144 * for a string-valued sysctl function. 1145 */ 1146 int 1147 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1148 size_t maxlen) 1149 { 1150 int error = 0, err2 = 0; 1151 size_t len; 1152 1153 if (newp && newlen >= maxlen) 1154 return (EINVAL); 1155 1156 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1157 1158 if (error == 0 && newp) { 1159 error = copyin(newp, str, newlen); 1160 str[newlen] = 0; 1161 } 1162 return (error); 1163 } 1164 1165 /* 1166 * As above, but read-only. 1167 */ 1168 int 1169 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1170 { 1171 int error = 0, err2 = 0; 1172 size_t len; 1173 1174 if (newp) 1175 return (EPERM); 1176 1177 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1178 1179 return (error); 1180 } 1181 1182 /* 1183 * Validate parameters and get old / set new parameters 1184 * for a structure oriented sysctl function. 1185 */ 1186 int 1187 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1188 size_t len) 1189 { 1190 int error = 0; 1191 1192 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1193 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1194 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1195 1196 return (error); 1197 } 1198 1199 /* 1200 * Validate parameters and get old parameters 1201 * for a structure oriented sysctl function. 1202 */ 1203 int 1204 sysctl_rdstruct(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 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1213 1214 return (error); 1215 } 1216 1217 /* 1218 * As above, but can return a truncated result. 1219 */ 1220 int 1221 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1222 size_t len) 1223 { 1224 int error = 0; 1225 1226 if (newp) 1227 return (EPERM); 1228 1229 len = min(*oldlenp, len); 1230 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1231 1232 return (error); 1233 } 1234 1235 /* 1236 * Get file structures. 1237 */ 1238 static int 1239 sysctl_file(void *vwhere, size_t *sizep) 1240 { 1241 int error; 1242 size_t buflen; 1243 struct file *fp; 1244 char *start, *where; 1245 1246 start = where = vwhere; 1247 buflen = *sizep; 1248 if (where == NULL) { 1249 /* 1250 * overestimate by 10 files 1251 */ 1252 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1253 return (0); 1254 } 1255 1256 /* 1257 * first copyout filehead 1258 */ 1259 if (buflen < sizeof(filehead)) { 1260 *sizep = 0; 1261 return (0); 1262 } 1263 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1264 if (error) 1265 return (error); 1266 buflen -= sizeof(filehead); 1267 where += sizeof(filehead); 1268 1269 /* 1270 * followed by an array of file structures 1271 */ 1272 LIST_FOREACH(fp, &filehead, f_list) { 1273 if (buflen < sizeof(struct file)) { 1274 *sizep = where - start; 1275 return (ENOMEM); 1276 } 1277 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1278 if (error) 1279 return (error); 1280 buflen -= sizeof(struct file); 1281 where += sizeof(struct file); 1282 } 1283 *sizep = where - start; 1284 return (0); 1285 } 1286 1287 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1288 #define FILL_PERM(src, dst) do { \ 1289 (dst)._key = (src)._key; \ 1290 (dst).uid = (src).uid; \ 1291 (dst).gid = (src).gid; \ 1292 (dst).cuid = (src).cuid; \ 1293 (dst).cgid = (src).cgid; \ 1294 (dst).mode = (src).mode; \ 1295 (dst)._seq = (src)._seq; \ 1296 } while (/*CONSTCOND*/ 0); 1297 #define FILL_MSG(src, dst) do { \ 1298 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1299 (dst).msg_qnum = (src).msg_qnum; \ 1300 (dst).msg_qbytes = (src).msg_qbytes; \ 1301 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1302 (dst).msg_lspid = (src).msg_lspid; \ 1303 (dst).msg_lrpid = (src).msg_lrpid; \ 1304 (dst).msg_stime = (src).msg_stime; \ 1305 (dst).msg_rtime = (src).msg_rtime; \ 1306 (dst).msg_ctime = (src).msg_ctime; \ 1307 } while (/*CONSTCOND*/ 0) 1308 #define FILL_SEM(src, dst) do { \ 1309 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1310 (dst).sem_nsems = (src).sem_nsems; \ 1311 (dst).sem_otime = (src).sem_otime; \ 1312 (dst).sem_ctime = (src).sem_ctime; \ 1313 } while (/*CONSTCOND*/ 0) 1314 #define FILL_SHM(src, dst) do { \ 1315 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1316 (dst).shm_segsz = (src).shm_segsz; \ 1317 (dst).shm_lpid = (src).shm_lpid; \ 1318 (dst).shm_cpid = (src).shm_cpid; \ 1319 (dst).shm_atime = (src).shm_atime; \ 1320 (dst).shm_dtime = (src).shm_dtime; \ 1321 (dst).shm_ctime = (src).shm_ctime; \ 1322 (dst).shm_nattch = (src).shm_nattch; \ 1323 } while (/*CONSTCOND*/ 0) 1324 1325 static int 1326 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1327 { 1328 #ifdef SYSVMSG 1329 struct msg_sysctl_info *msgsi = NULL; 1330 #endif 1331 #ifdef SYSVSEM 1332 struct sem_sysctl_info *semsi = NULL; 1333 #endif 1334 #ifdef SYSVSHM 1335 struct shm_sysctl_info *shmsi = NULL; 1336 #endif 1337 size_t infosize, dssize, tsize, buflen; 1338 void *buf = NULL; 1339 char *start; 1340 int32_t nds; 1341 int i, error, ret; 1342 1343 if (namelen != 1) 1344 return (EINVAL); 1345 1346 start = where; 1347 buflen = *sizep; 1348 1349 switch (*name) { 1350 case KERN_SYSVIPC_MSG_INFO: 1351 #ifdef SYSVMSG 1352 infosize = sizeof(msgsi->msginfo); 1353 nds = msginfo.msgmni; 1354 dssize = sizeof(msgsi->msgids[0]); 1355 break; 1356 #else 1357 return (EINVAL); 1358 #endif 1359 case KERN_SYSVIPC_SEM_INFO: 1360 #ifdef SYSVSEM 1361 infosize = sizeof(semsi->seminfo); 1362 nds = seminfo.semmni; 1363 dssize = sizeof(semsi->semids[0]); 1364 break; 1365 #else 1366 return (EINVAL); 1367 #endif 1368 case KERN_SYSVIPC_SHM_INFO: 1369 #ifdef SYSVSHM 1370 infosize = sizeof(shmsi->shminfo); 1371 nds = shminfo.shmmni; 1372 dssize = sizeof(shmsi->shmids[0]); 1373 break; 1374 #else 1375 return (EINVAL); 1376 #endif 1377 default: 1378 return (EINVAL); 1379 } 1380 /* 1381 * Round infosize to 64 bit boundary if requesting more than just 1382 * the info structure or getting the total data size. 1383 */ 1384 if (where == NULL || *sizep > infosize) 1385 infosize = ((infosize + 7) / 8) * 8; 1386 tsize = infosize + nds * dssize; 1387 1388 /* Return just the total size required. */ 1389 if (where == NULL) { 1390 *sizep = tsize; 1391 return (0); 1392 } 1393 1394 /* Not enough room for even the info struct. */ 1395 if (buflen < infosize) { 1396 *sizep = 0; 1397 return (ENOMEM); 1398 } 1399 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1400 memset(buf, 0, min(tsize, buflen)); 1401 1402 switch (*name) { 1403 #ifdef SYSVMSG 1404 case KERN_SYSVIPC_MSG_INFO: 1405 msgsi = (struct msg_sysctl_info *)buf; 1406 msgsi->msginfo = msginfo; 1407 break; 1408 #endif 1409 #ifdef SYSVSEM 1410 case KERN_SYSVIPC_SEM_INFO: 1411 semsi = (struct sem_sysctl_info *)buf; 1412 semsi->seminfo = seminfo; 1413 break; 1414 #endif 1415 #ifdef SYSVSHM 1416 case KERN_SYSVIPC_SHM_INFO: 1417 shmsi = (struct shm_sysctl_info *)buf; 1418 shmsi->shminfo = shminfo; 1419 break; 1420 #endif 1421 } 1422 buflen -= infosize; 1423 1424 ret = 0; 1425 if (buflen > 0) { 1426 /* Fill in the IPC data structures. */ 1427 for (i = 0; i < nds; i++) { 1428 if (buflen < dssize) { 1429 ret = ENOMEM; 1430 break; 1431 } 1432 switch (*name) { 1433 #ifdef SYSVMSG 1434 case KERN_SYSVIPC_MSG_INFO: 1435 FILL_MSG(msqids[i], msgsi->msgids[i]); 1436 break; 1437 #endif 1438 #ifdef SYSVSEM 1439 case KERN_SYSVIPC_SEM_INFO: 1440 FILL_SEM(sema[i], semsi->semids[i]); 1441 break; 1442 #endif 1443 #ifdef SYSVSHM 1444 case KERN_SYSVIPC_SHM_INFO: 1445 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1446 break; 1447 #endif 1448 } 1449 buflen -= dssize; 1450 } 1451 } 1452 *sizep -= buflen; 1453 error = copyout(buf, start, *sizep); 1454 /* If copyout succeeded, use return code set earlier. */ 1455 if (error == 0) 1456 error = ret; 1457 if (buf) 1458 free(buf, M_TEMP); 1459 return (error); 1460 } 1461 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1462 1463 static int 1464 sysctl_msgbuf(void *vwhere, size_t *sizep) 1465 { 1466 char *where = vwhere; 1467 size_t len, maxlen = *sizep; 1468 long beg, end; 1469 int error; 1470 1471 /* 1472 * deal with cases where the message buffer has 1473 * become corrupted. 1474 */ 1475 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1476 msgbufenabled = 0; 1477 return (ENXIO); 1478 } 1479 1480 if (where == NULL) { 1481 /* always return full buffer size */ 1482 *sizep = msgbufp->msg_bufs; 1483 return (0); 1484 } 1485 1486 error = 0; 1487 maxlen = min(msgbufp->msg_bufs, maxlen); 1488 1489 /* 1490 * First, copy from the write pointer to the end of 1491 * message buffer. 1492 */ 1493 beg = msgbufp->msg_bufx; 1494 end = msgbufp->msg_bufs; 1495 while (maxlen > 0) { 1496 len = min(end - beg, maxlen); 1497 if (len == 0) 1498 break; 1499 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1500 if (error) 1501 break; 1502 where += len; 1503 maxlen -= len; 1504 1505 /* 1506 * ... then, copy from the beginning of message buffer to 1507 * the write pointer. 1508 */ 1509 beg = 0; 1510 end = msgbufp->msg_bufx; 1511 } 1512 return (error); 1513 } 1514 1515 /* 1516 * try over estimating by 5 procs 1517 */ 1518 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1519 1520 static int 1521 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1522 { 1523 struct eproc eproc; 1524 struct kinfo_proc2 kproc2; 1525 struct kinfo_proc *dp; 1526 struct proc *p; 1527 const struct proclist_desc *pd; 1528 char *where, *dp2; 1529 int type, op, arg; 1530 u_int elem_size, elem_count; 1531 size_t buflen, needed; 1532 int error; 1533 1534 dp = vwhere; 1535 dp2 = where = vwhere; 1536 buflen = where != NULL ? *sizep : 0; 1537 error = 0; 1538 needed = 0; 1539 type = name[0]; 1540 1541 if (type == KERN_PROC) { 1542 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1543 return (EINVAL); 1544 op = name[1]; 1545 if (op != KERN_PROC_ALL) 1546 arg = name[2]; 1547 else 1548 arg = 0; /* Quell compiler warning */ 1549 elem_size = elem_count = 0; /* Ditto */ 1550 } else { 1551 if (namelen != 5) 1552 return (EINVAL); 1553 op = name[1]; 1554 arg = name[2]; 1555 elem_size = name[3]; 1556 elem_count = name[4]; 1557 } 1558 1559 proclist_lock_read(); 1560 1561 pd = proclists; 1562 again: 1563 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1564 /* 1565 * Skip embryonic processes. 1566 */ 1567 if (p->p_stat == SIDL) 1568 continue; 1569 /* 1570 * TODO - make more efficient (see notes below). 1571 * do by session. 1572 */ 1573 switch (op) { 1574 1575 case KERN_PROC_PID: 1576 /* could do this with just a lookup */ 1577 if (p->p_pid != (pid_t)arg) 1578 continue; 1579 break; 1580 1581 case KERN_PROC_PGRP: 1582 /* could do this by traversing pgrp */ 1583 if (p->p_pgrp->pg_id != (pid_t)arg) 1584 continue; 1585 break; 1586 1587 case KERN_PROC_SESSION: 1588 if (p->p_session->s_sid != (pid_t)arg) 1589 continue; 1590 break; 1591 1592 case KERN_PROC_TTY: 1593 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1594 if ((p->p_flag & P_CONTROLT) == 0 || 1595 p->p_session->s_ttyp == NULL || 1596 p->p_session->s_ttyvp != NULL) 1597 continue; 1598 } else if ((p->p_flag & P_CONTROLT) == 0 || 1599 p->p_session->s_ttyp == NULL) { 1600 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1601 continue; 1602 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1603 continue; 1604 break; 1605 1606 case KERN_PROC_UID: 1607 if (p->p_ucred->cr_uid != (uid_t)arg) 1608 continue; 1609 break; 1610 1611 case KERN_PROC_RUID: 1612 if (p->p_cred->p_ruid != (uid_t)arg) 1613 continue; 1614 break; 1615 1616 case KERN_PROC_GID: 1617 if (p->p_ucred->cr_gid != (uid_t)arg) 1618 continue; 1619 break; 1620 1621 case KERN_PROC_RGID: 1622 if (p->p_cred->p_rgid != (uid_t)arg) 1623 continue; 1624 break; 1625 1626 case KERN_PROC_ALL: 1627 /* allow everything */ 1628 break; 1629 1630 default: 1631 error = EINVAL; 1632 goto cleanup; 1633 } 1634 if (type == KERN_PROC) { 1635 if (buflen >= sizeof(struct kinfo_proc)) { 1636 fill_eproc(p, &eproc); 1637 error = copyout((caddr_t)p, &dp->kp_proc, 1638 sizeof(struct proc)); 1639 if (error) 1640 goto cleanup; 1641 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1642 sizeof(eproc)); 1643 if (error) 1644 goto cleanup; 1645 dp++; 1646 buflen -= sizeof(struct kinfo_proc); 1647 } 1648 needed += sizeof(struct kinfo_proc); 1649 } else { /* KERN_PROC2 */ 1650 if (buflen >= elem_size && elem_count > 0) { 1651 fill_kproc2(p, &kproc2); 1652 /* 1653 * Copy out elem_size, but not larger than 1654 * the size of a struct kinfo_proc2. 1655 */ 1656 error = copyout(&kproc2, dp2, 1657 min(sizeof(kproc2), elem_size)); 1658 if (error) 1659 goto cleanup; 1660 dp2 += elem_size; 1661 buflen -= elem_size; 1662 elem_count--; 1663 } 1664 needed += elem_size; 1665 } 1666 } 1667 pd++; 1668 if (pd->pd_list != NULL) 1669 goto again; 1670 proclist_unlock_read(); 1671 1672 if (where != NULL) { 1673 if (type == KERN_PROC) 1674 *sizep = (caddr_t)dp - where; 1675 else 1676 *sizep = dp2 - where; 1677 if (needed > *sizep) 1678 return (ENOMEM); 1679 } else { 1680 needed += KERN_PROCSLOP; 1681 *sizep = needed; 1682 } 1683 return (0); 1684 cleanup: 1685 proclist_unlock_read(); 1686 return (error); 1687 } 1688 1689 1690 /* 1691 * try over estimating by 5 LWPs 1692 */ 1693 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1694 1695 static int 1696 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1697 { 1698 struct kinfo_lwp klwp; 1699 struct proc *p; 1700 struct lwp *l; 1701 char *where, *dp; 1702 int type, pid, elem_size, elem_count; 1703 int buflen, needed, error; 1704 1705 dp = where = vwhere; 1706 buflen = where != NULL ? *sizep : 0; 1707 error = needed = 0; 1708 type = name[0]; 1709 1710 if (namelen != 4) 1711 return (EINVAL); 1712 pid = name[1]; 1713 elem_size = name[2]; 1714 elem_count = name[3]; 1715 1716 p = pfind(pid); 1717 if (p == NULL) 1718 return (ESRCH); 1719 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1720 if (buflen >= elem_size && elem_count > 0) { 1721 fill_lwp(l, &klwp); 1722 /* 1723 * Copy out elem_size, but not larger than 1724 * the size of a struct kinfo_proc2. 1725 */ 1726 error = copyout(&klwp, dp, 1727 min(sizeof(klwp), elem_size)); 1728 if (error) 1729 goto cleanup; 1730 dp += elem_size; 1731 buflen -= elem_size; 1732 elem_count--; 1733 } 1734 needed += elem_size; 1735 } 1736 1737 if (where != NULL) { 1738 *sizep = dp - where; 1739 if (needed > *sizep) 1740 return (ENOMEM); 1741 } else { 1742 needed += KERN_PROCSLOP; 1743 *sizep = needed; 1744 } 1745 return (0); 1746 cleanup: 1747 return (error); 1748 } 1749 1750 /* 1751 * Fill in an eproc structure for the specified process. 1752 */ 1753 void 1754 fill_eproc(struct proc *p, struct eproc *ep) 1755 { 1756 struct tty *tp; 1757 struct lwp *l; 1758 1759 ep->e_paddr = p; 1760 ep->e_sess = p->p_session; 1761 ep->e_pcred = *p->p_cred; 1762 ep->e_ucred = *p->p_ucred; 1763 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1764 ep->e_vm.vm_rssize = 0; 1765 ep->e_vm.vm_tsize = 0; 1766 ep->e_vm.vm_dsize = 0; 1767 ep->e_vm.vm_ssize = 0; 1768 /* ep->e_vm.vm_pmap = XXX; */ 1769 } else { 1770 struct vmspace *vm = p->p_vmspace; 1771 1772 ep->e_vm.vm_rssize = vm_resident_count(vm); 1773 ep->e_vm.vm_tsize = vm->vm_tsize; 1774 ep->e_vm.vm_dsize = vm->vm_dsize; 1775 ep->e_vm.vm_ssize = vm->vm_ssize; 1776 1777 /* Pick a "representative" LWP */ 1778 l = proc_representative_lwp(p); 1779 1780 if (l->l_wmesg) 1781 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1782 } 1783 if (p->p_pptr) 1784 ep->e_ppid = p->p_pptr->p_pid; 1785 else 1786 ep->e_ppid = 0; 1787 ep->e_pgid = p->p_pgrp->pg_id; 1788 ep->e_sid = ep->e_sess->s_sid; 1789 ep->e_jobc = p->p_pgrp->pg_jobc; 1790 if ((p->p_flag & P_CONTROLT) && 1791 (tp = ep->e_sess->s_ttyp)) { 1792 ep->e_tdev = tp->t_dev; 1793 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1794 ep->e_tsess = tp->t_session; 1795 } else 1796 ep->e_tdev = NODEV; 1797 1798 ep->e_xsize = ep->e_xrssize = 0; 1799 ep->e_xccount = ep->e_xswrss = 0; 1800 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1801 if (SESS_LEADER(p)) 1802 ep->e_flag |= EPROC_SLEADER; 1803 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1804 } 1805 1806 /* 1807 * Fill in an eproc structure for the specified process. 1808 */ 1809 static void 1810 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1811 { 1812 struct tty *tp; 1813 struct lwp *l; 1814 struct timeval ut, st; 1815 1816 memset(ki, 0, sizeof(*ki)); 1817 1818 ki->p_paddr = PTRTOINT64(p); 1819 ki->p_fd = PTRTOINT64(p->p_fd); 1820 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1821 ki->p_stats = PTRTOINT64(p->p_stats); 1822 ki->p_limit = PTRTOINT64(p->p_limit); 1823 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1824 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1825 ki->p_sess = PTRTOINT64(p->p_session); 1826 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1827 ki->p_ru = PTRTOINT64(p->p_ru); 1828 1829 ki->p_eflag = 0; 1830 ki->p_exitsig = p->p_exitsig; 1831 ki->p_flag = p->p_flag; 1832 1833 ki->p_pid = p->p_pid; 1834 if (p->p_pptr) 1835 ki->p_ppid = p->p_pptr->p_pid; 1836 else 1837 ki->p_ppid = 0; 1838 ki->p_sid = p->p_session->s_sid; 1839 ki->p__pgid = p->p_pgrp->pg_id; 1840 1841 ki->p_tpgid = NO_PGID; /* may be changed if controlling tty below */ 1842 1843 ki->p_uid = p->p_ucred->cr_uid; 1844 ki->p_ruid = p->p_cred->p_ruid; 1845 ki->p_gid = p->p_ucred->cr_gid; 1846 ki->p_rgid = p->p_cred->p_rgid; 1847 ki->p_svuid = p->p_cred->p_svuid; 1848 ki->p_svgid = p->p_cred->p_svgid; 1849 1850 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1851 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1852 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1853 1854 ki->p_jobc = p->p_pgrp->pg_jobc; 1855 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1856 ki->p_tdev = tp->t_dev; 1857 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1858 ki->p_tsess = PTRTOINT64(tp->t_session); 1859 } else { 1860 ki->p_tdev = NODEV; 1861 } 1862 1863 ki->p_estcpu = p->p_estcpu; 1864 ki->p_rtime_sec = p->p_rtime.tv_sec; 1865 ki->p_rtime_usec = p->p_rtime.tv_usec; 1866 ki->p_cpticks = p->p_cpticks; 1867 ki->p_pctcpu = p->p_pctcpu; 1868 1869 ki->p_uticks = p->p_uticks; 1870 ki->p_sticks = p->p_sticks; 1871 ki->p_iticks = p->p_iticks; 1872 1873 ki->p_tracep = PTRTOINT64(p->p_tracep); 1874 ki->p_traceflag = p->p_traceflag; 1875 1876 1877 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1878 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1879 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1880 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1881 1882 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1883 ki->p_realstat = p->p_stat; 1884 ki->p_nice = p->p_nice; 1885 1886 ki->p_xstat = p->p_xstat; 1887 ki->p_acflag = p->p_acflag; 1888 1889 strncpy(ki->p_comm, p->p_comm, 1890 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1891 1892 strncpy(ki->p_login, p->p_session->s_login, 1893 min(sizeof ki->p_login - 1, sizeof p->p_session->s_login)); 1894 1895 ki->p_nlwps = p->p_nlwps; 1896 ki->p_nrlwps = p->p_nrlwps; 1897 ki->p_realflag = p->p_flag; 1898 1899 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1900 ki->p_vm_rssize = 0; 1901 ki->p_vm_tsize = 0; 1902 ki->p_vm_dsize = 0; 1903 ki->p_vm_ssize = 0; 1904 l = NULL; 1905 } else { 1906 struct vmspace *vm = p->p_vmspace; 1907 1908 ki->p_vm_rssize = vm_resident_count(vm); 1909 ki->p_vm_tsize = vm->vm_tsize; 1910 ki->p_vm_dsize = vm->vm_dsize; 1911 ki->p_vm_ssize = vm->vm_ssize; 1912 1913 /* Pick a "representative" LWP */ 1914 l = proc_representative_lwp(p); 1915 ki->p_forw = PTRTOINT64(l->l_forw); 1916 ki->p_back = PTRTOINT64(l->l_back); 1917 ki->p_addr = PTRTOINT64(l->l_addr); 1918 ki->p_stat = l->l_stat; 1919 ki->p_flag |= l->l_flag; 1920 ki->p_swtime = l->l_swtime; 1921 ki->p_slptime = l->l_slptime; 1922 if (l->l_stat == LSONPROC) { 1923 KDASSERT(l->l_cpu != NULL); 1924 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1925 } else 1926 ki->p_schedflags = 0; 1927 ki->p_holdcnt = l->l_holdcnt; 1928 ki->p_priority = l->l_priority; 1929 ki->p_usrpri = l->l_usrpri; 1930 if (l->l_wmesg) 1931 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1932 ki->p_wchan = PTRTOINT64(l->l_wchan); 1933 1934 } 1935 1936 if (p->p_session->s_ttyvp) 1937 ki->p_eflag |= EPROC_CTTY; 1938 if (SESS_LEADER(p)) 1939 ki->p_eflag |= EPROC_SLEADER; 1940 1941 /* XXX Is this double check necessary? */ 1942 if (P_ZOMBIE(p)) { 1943 ki->p_uvalid = 0; 1944 } else { 1945 ki->p_uvalid = 1; 1946 1947 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1948 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1949 1950 calcru(p, &ut, &st, 0); 1951 ki->p_uutime_sec = ut.tv_sec; 1952 ki->p_uutime_usec = ut.tv_usec; 1953 ki->p_ustime_sec = st.tv_sec; 1954 ki->p_ustime_usec = st.tv_usec; 1955 1956 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1957 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1958 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1959 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1960 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1961 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1962 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1963 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1964 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1965 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1966 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1967 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1968 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1969 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1970 1971 timeradd(&p->p_stats->p_cru.ru_utime, 1972 &p->p_stats->p_cru.ru_stime, &ut); 1973 ki->p_uctime_sec = ut.tv_sec; 1974 ki->p_uctime_usec = ut.tv_usec; 1975 } 1976 #ifdef MULTIPROCESSOR 1977 if (l && l->l_cpu != NULL) 1978 ki->p_cpuid = l->l_cpu->ci_cpuid; 1979 else 1980 #endif 1981 ki->p_cpuid = KI_NOCPU; 1982 1983 } 1984 1985 /* 1986 * Fill in a kinfo_lwp structure for the specified lwp. 1987 */ 1988 static void 1989 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1990 { 1991 1992 kl->l_forw = PTRTOINT64(l->l_forw); 1993 kl->l_back = PTRTOINT64(l->l_back); 1994 kl->l_laddr = PTRTOINT64(l); 1995 kl->l_addr = PTRTOINT64(l->l_addr); 1996 kl->l_stat = l->l_stat; 1997 kl->l_lid = l->l_lid; 1998 kl->l_flag = l->l_flag; 1999 2000 kl->l_swtime = l->l_swtime; 2001 kl->l_slptime = l->l_slptime; 2002 if (l->l_stat == LSONPROC) { 2003 KDASSERT(l->l_cpu != NULL); 2004 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 2005 } else 2006 kl->l_schedflags = 0; 2007 kl->l_holdcnt = l->l_holdcnt; 2008 kl->l_priority = l->l_priority; 2009 kl->l_usrpri = l->l_usrpri; 2010 if (l->l_wmesg) 2011 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 2012 kl->l_wchan = PTRTOINT64(l->l_wchan); 2013 #ifdef MULTIPROCESSOR 2014 if (l->l_cpu != NULL) 2015 kl->l_cpuid = l->l_cpu->ci_cpuid; 2016 else 2017 #endif 2018 kl->l_cpuid = KI_NOCPU; 2019 } 2020 2021 int 2022 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 2023 struct proc *up) 2024 { 2025 struct ps_strings pss; 2026 struct proc *p; 2027 size_t len, upper_bound, xlen, i; 2028 struct uio auio; 2029 struct iovec aiov; 2030 vaddr_t argv; 2031 pid_t pid; 2032 int nargv, type, error; 2033 char *arg; 2034 char *tmp; 2035 2036 if (namelen != 2) 2037 return (EINVAL); 2038 pid = name[0]; 2039 type = name[1]; 2040 2041 switch (type) { 2042 case KERN_PROC_ARGV: 2043 case KERN_PROC_NARGV: 2044 case KERN_PROC_ENV: 2045 case KERN_PROC_NENV: 2046 /* ok */ 2047 break; 2048 default: 2049 return (EINVAL); 2050 } 2051 2052 /* check pid */ 2053 if ((p = pfind(pid)) == NULL) 2054 return (EINVAL); 2055 2056 /* only root or same user change look at the environment */ 2057 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 2058 if (up->p_ucred->cr_uid != 0) { 2059 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 2060 up->p_cred->p_ruid != p->p_cred->p_svuid) 2061 return (EPERM); 2062 } 2063 } 2064 2065 if (sizep != NULL && where == NULL) { 2066 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 2067 *sizep = sizeof (int); 2068 else 2069 *sizep = ARG_MAX; /* XXX XXX XXX */ 2070 return (0); 2071 } 2072 if (where == NULL || sizep == NULL) 2073 return (EINVAL); 2074 2075 /* 2076 * Zombies don't have a stack, so we can't read their psstrings. 2077 * System processes also don't have a user stack. 2078 */ 2079 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 2080 return (EINVAL); 2081 2082 /* 2083 * Lock the process down in memory. 2084 */ 2085 /* XXXCDC: how should locking work here? */ 2086 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 2087 return (EFAULT); 2088 2089 p->p_vmspace->vm_refcnt++; /* XXX */ 2090 2091 /* 2092 * Allocate a temporary buffer to hold the arguments. 2093 */ 2094 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2095 2096 /* 2097 * Read in the ps_strings structure. 2098 */ 2099 aiov.iov_base = &pss; 2100 aiov.iov_len = sizeof(pss); 2101 auio.uio_iov = &aiov; 2102 auio.uio_iovcnt = 1; 2103 auio.uio_offset = (vaddr_t)p->p_psstr; 2104 auio.uio_resid = sizeof(pss); 2105 auio.uio_segflg = UIO_SYSSPACE; 2106 auio.uio_rw = UIO_READ; 2107 auio.uio_procp = NULL; 2108 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2109 if (error) 2110 goto done; 2111 2112 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2113 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2114 else 2115 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2116 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2117 error = copyout(&nargv, where, sizeof(nargv)); 2118 *sizep = sizeof(nargv); 2119 goto done; 2120 } 2121 /* 2122 * Now read the address of the argument vector. 2123 */ 2124 switch (type) { 2125 case KERN_PROC_ARGV: 2126 /* XXX compat32 stuff here */ 2127 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2128 break; 2129 case KERN_PROC_ENV: 2130 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2131 break; 2132 default: 2133 return (EINVAL); 2134 } 2135 auio.uio_offset = (off_t)(long)tmp; 2136 aiov.iov_base = &argv; 2137 aiov.iov_len = sizeof(argv); 2138 auio.uio_iov = &aiov; 2139 auio.uio_iovcnt = 1; 2140 auio.uio_resid = sizeof(argv); 2141 auio.uio_segflg = UIO_SYSSPACE; 2142 auio.uio_rw = UIO_READ; 2143 auio.uio_procp = NULL; 2144 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2145 if (error) 2146 goto done; 2147 2148 /* 2149 * Now copy in the actual argument vector, one page at a time, 2150 * since we don't know how long the vector is (though, we do 2151 * know how many NUL-terminated strings are in the vector). 2152 */ 2153 len = 0; 2154 upper_bound = *sizep; 2155 for (; nargv != 0 && len < upper_bound; len += xlen) { 2156 aiov.iov_base = arg; 2157 aiov.iov_len = PAGE_SIZE; 2158 auio.uio_iov = &aiov; 2159 auio.uio_iovcnt = 1; 2160 auio.uio_offset = argv + len; 2161 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2162 auio.uio_resid = xlen; 2163 auio.uio_segflg = UIO_SYSSPACE; 2164 auio.uio_rw = UIO_READ; 2165 auio.uio_procp = NULL; 2166 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2167 if (error) 2168 goto done; 2169 2170 for (i = 0; i < xlen && nargv != 0; i++) { 2171 if (arg[i] == '\0') 2172 nargv--; /* one full string */ 2173 } 2174 2175 /* 2176 * Make sure we don't copyout past the end of the user's 2177 * buffer. 2178 */ 2179 if (len + i > upper_bound) 2180 i = upper_bound - len; 2181 2182 error = copyout(arg, (char *)where + len, i); 2183 if (error) 2184 break; 2185 2186 if (nargv == 0) { 2187 len += i; 2188 break; 2189 } 2190 } 2191 *sizep = len; 2192 2193 done: 2194 uvmspace_free(p->p_vmspace); 2195 2196 free(arg, M_TEMP); 2197 return (error); 2198 } 2199 2200 #if NPTY > 0 2201 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2202 2203 /* 2204 * Validate parameters and get old / set new parameters 2205 * for pty sysctl function. 2206 */ 2207 static int 2208 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2209 { 2210 int error = 0; 2211 int oldmax = 0, newmax = 0; 2212 2213 /* get current value of maxptys */ 2214 oldmax = pty_maxptys(0, 0); 2215 2216 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2217 2218 if (!error && newp) { 2219 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2220 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2221 2222 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2223 return (EINVAL); 2224 2225 } 2226 2227 return (error); 2228 } 2229 #endif /* NPTY > 0 */ 2230 2231 static int 2232 sysctl_dotkstat(int *name, u_int namelen, void *where, size_t *sizep, 2233 void *newp) 2234 { 2235 2236 /* all sysctl names at this level are terminal */ 2237 if (namelen != 1) 2238 return (ENOTDIR); /* overloaded */ 2239 2240 switch (name[0]) { 2241 case KERN_TKSTAT_NIN: 2242 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2243 case KERN_TKSTAT_NOUT: 2244 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2245 case KERN_TKSTAT_CANCC: 2246 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2247 case KERN_TKSTAT_RAWCC: 2248 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2249 default: 2250 return (EOPNOTSUPP); 2251 } 2252 } 2253
Indexes created Tue Sep 30 07:10:03 GMT 2025