kern_sysctl.c revision 1.135
1 /* $NetBSD: kern_sysctl.c,v 1.135 2003/06/28 14:21:55 darrenr 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 1.135 2003/06/28 14:21:55 darrenr 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), l); 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 lwp *l) 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 && l->l_proc->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, l->l_proc)); 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, l->l_proc)); 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 lwp *l) 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 lwp *l) 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 lwp *l) 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 struct proc *p = l->l_proc; 799 char *tmps = NULL; 800 size_t len, curlen; 801 u_int i; 802 803 if (namelen < 2) 804 return (EINVAL); 805 806 if (name[0] == PROC_CURPROC) { 807 ptmp = p; 808 } else { 809 proclist_lock_read(); 810 for (pd = proclists; pd->pd_list != NULL; pd++) { 811 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 812 ptmp = LIST_NEXT(ptmp, p_list)) { 813 /* Skip embryonic processes. */ 814 if (ptmp->p_stat == SIDL) 815 continue; 816 if (ptmp->p_pid == (pid_t)name[0]) 817 break; 818 } 819 if (ptmp != NULL) 820 break; 821 } 822 proclist_unlock_read(); 823 if (ptmp == NULL) 824 return (ESRCH); 825 if (p->p_ucred->cr_uid != 0) { 826 if (p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 827 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 828 return (EPERM); 829 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 830 return (EPERM); /* sgid proc */ 831 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 832 if (p->p_ucred->cr_groups[i] == 833 ptmp->p_cred->p_rgid) 834 break; 835 } 836 if (i == p->p_ucred->cr_ngroups) 837 return (EPERM); 838 } 839 } 840 switch (name[1]) { 841 case PROC_PID_STOPFORK: 842 if (namelen != 2) 843 return (EINVAL); 844 i = ((ptmp->p_flag & P_STOPFORK) != 0); 845 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 846 return (error); 847 if (i != 0) 848 ptmp->p_flag |= P_STOPFORK; 849 else 850 ptmp->p_flag &= ~P_STOPFORK; 851 return (0); 852 break; 853 854 case PROC_PID_STOPEXEC: 855 if (namelen != 2) 856 return (EINVAL); 857 i = ((ptmp->p_flag & P_STOPEXEC) != 0); 858 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 859 return (error); 860 if (i != 0) 861 ptmp->p_flag |= P_STOPEXEC; 862 else 863 ptmp->p_flag &= ~P_STOPEXEC; 864 return (0); 865 break; 866 867 case PROC_PID_CORENAME: 868 if (namelen != 2) 869 return (EINVAL); 870 /* 871 * Can't use sysctl_string() here because we may malloc a new 872 * area during the process, so we have to do it by hand. 873 */ 874 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 875 if (oldlenp && *oldlenp < curlen) { 876 if (!oldp) 877 *oldlenp = curlen; 878 return (ENOMEM); 879 } 880 if (newp) { 881 if (securelevel > 2) 882 return (EPERM); 883 if (newlen > MAXPATHLEN) 884 return (ENAMETOOLONG); 885 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 886 if (tmps == NULL) 887 return (ENOMEM); 888 error = copyin(newp, tmps, newlen + 1); 889 tmps[newlen] = '\0'; 890 if (error) 891 goto cleanup; 892 /* Enforce to be either 'core' for end with '.core' */ 893 if (newlen < 4) { /* c.o.r.e */ 894 error = EINVAL; 895 goto cleanup; 896 } 897 len = newlen - 4; 898 if (len > 0) { 899 if (tmps[len - 1] != '.' && 900 tmps[len - 1] != '/') { 901 error = EINVAL; 902 goto cleanup; 903 } 904 } 905 if (strcmp(&tmps[len], "core") != 0) { 906 error = EINVAL; 907 goto cleanup; 908 } 909 } 910 if (oldp && oldlenp) { 911 *oldlenp = curlen; 912 error = copyout(ptmp->p_limit->pl_corename, oldp, 913 curlen); 914 } 915 if (newp && error == 0) { 916 /* if the 2 strings are identical, don't limcopy() */ 917 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 918 error = 0; 919 goto cleanup; 920 } 921 if (ptmp->p_limit->p_refcnt > 1 && 922 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 923 newplim = limcopy(ptmp->p_limit); 924 limfree(ptmp->p_limit); 925 ptmp->p_limit = newplim; 926 } 927 if (ptmp->p_limit->pl_corename != defcorename) { 928 free(ptmp->p_limit->pl_corename, M_TEMP); 929 } 930 ptmp->p_limit->pl_corename = tmps; 931 return (0); 932 } 933 cleanup: 934 if (tmps) 935 free(tmps, M_TEMP); 936 return (error); 937 break; 938 939 case PROC_PID_LIMIT: 940 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 941 return (EINVAL); 942 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 943 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 944 error = sysctl_quad(oldp, oldlenp, newp, newlen, 945 &alim.rlim_max); 946 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 947 error = sysctl_quad(oldp, oldlenp, newp, newlen, 948 &alim.rlim_cur); 949 else 950 error = (EINVAL); 951 952 if (error) 953 return (error); 954 955 if (newp) 956 error = dosetrlimit(ptmp, p->p_cred, 957 name[2] - 1, &alim); 958 return (error); 959 break; 960 961 default: 962 return (EINVAL); 963 break; 964 } 965 /* NOTREACHED */ 966 return (EINVAL); 967 } 968 969 int 970 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 971 void *newp, size_t newlen, struct lwp *l) 972 { 973 static struct { 974 const char *name; 975 int type; 976 } emulations[] = CTL_EMUL_NAMES; 977 const struct emul *e; 978 const char *ename; 979 #ifdef LKM 980 extern struct lock exec_lock; /* XXX */ 981 int error; 982 #else 983 extern int nexecs_builtin; 984 extern const struct execsw execsw_builtin[]; 985 int i; 986 #endif 987 988 /* all sysctl names at this level are name and field */ 989 if (namelen < 2) 990 return (ENOTDIR); /* overloaded */ 991 992 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 993 return (EOPNOTSUPP); 994 995 ename = emulations[name[0]].name; 996 997 #ifdef LKM 998 lockmgr(&exec_lock, LK_SHARED, NULL); 999 if ((e = emul_search(ename))) { 1000 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1001 newp, newlen, l); 1002 } else 1003 error = EOPNOTSUPP; 1004 lockmgr(&exec_lock, LK_RELEASE, NULL); 1005 1006 return (error); 1007 #else 1008 for (i = 0; i < nexecs_builtin; i++) { 1009 e = execsw_builtin[i].es_emul; 1010 /* 1011 * In order to match e.g. e->e_name "irix o32" 1012 * with ename "irix", we limit the comparison 1013 * to the length of ename. 1014 */ 1015 if (e == NULL || 1016 strncmp(ename, e->e_name, strlen(ename)) != 0 || 1017 e->e_sysctl == NULL) 1018 continue; 1019 1020 return ((*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1021 newp, newlen, p)); 1022 } 1023 1024 return (EOPNOTSUPP); 1025 #endif 1026 } 1027 /* 1028 * Convenience macros. 1029 */ 1030 1031 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 1032 if (oldlenp) { \ 1033 if (!oldp) \ 1034 *oldlenp = len; \ 1035 else { \ 1036 if (*oldlenp < len) \ 1037 return (ENOMEM); \ 1038 *oldlenp = len; \ 1039 error = copyout((caddr_t)valp, oldp, len); \ 1040 } \ 1041 } 1042 1043 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 1044 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 1045 1046 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 1047 if (newp && newlen != len) \ 1048 return (EINVAL); 1049 1050 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1051 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1052 1053 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1054 if (error == 0 && newp) \ 1055 error = copyin(newp, valp, len); 1056 1057 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1058 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1059 1060 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1061 if (oldlenp) { \ 1062 len = strlen(str) + 1; \ 1063 if (!oldp) \ 1064 *oldlenp = len; \ 1065 else { \ 1066 if (*oldlenp < len) { \ 1067 err2 = ENOMEM; \ 1068 len = *oldlenp; \ 1069 } else \ 1070 *oldlenp = len; \ 1071 error = copyout(str, oldp, len);\ 1072 if (error == 0) \ 1073 error = err2; \ 1074 } \ 1075 } 1076 1077 /* 1078 * Validate parameters and get old / set new parameters 1079 * for an integer-valued sysctl function. 1080 */ 1081 int 1082 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1083 { 1084 int error = 0; 1085 1086 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1087 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1088 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1089 1090 return (error); 1091 } 1092 1093 1094 /* 1095 * As above, but read-only. 1096 */ 1097 int 1098 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1099 { 1100 int error = 0; 1101 1102 if (newp) 1103 return (EPERM); 1104 1105 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1106 1107 return (error); 1108 } 1109 1110 /* 1111 * Validate parameters and get old / set new parameters 1112 * for an quad-valued sysctl function. 1113 */ 1114 int 1115 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1116 quad_t *valp) 1117 { 1118 int error = 0; 1119 1120 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1121 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1122 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1123 1124 return (error); 1125 } 1126 1127 /* 1128 * As above, but read-only. 1129 */ 1130 int 1131 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1132 { 1133 int error = 0; 1134 1135 if (newp) 1136 return (EPERM); 1137 1138 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1139 1140 return (error); 1141 } 1142 1143 /* 1144 * Validate parameters and get old / set new parameters 1145 * for a string-valued sysctl function. 1146 */ 1147 int 1148 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1149 size_t maxlen) 1150 { 1151 int error = 0, err2 = 0; 1152 size_t len; 1153 1154 if (newp && newlen >= maxlen) 1155 return (EINVAL); 1156 1157 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1158 1159 if (error == 0 && newp) { 1160 error = copyin(newp, str, newlen); 1161 str[newlen] = 0; 1162 } 1163 return (error); 1164 } 1165 1166 /* 1167 * As above, but read-only. 1168 */ 1169 int 1170 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1171 { 1172 int error = 0, err2 = 0; 1173 size_t len; 1174 1175 if (newp) 1176 return (EPERM); 1177 1178 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1179 1180 return (error); 1181 } 1182 1183 /* 1184 * Validate parameters and get old / set new parameters 1185 * for a structure oriented sysctl function. 1186 */ 1187 int 1188 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1189 size_t len) 1190 { 1191 int error = 0; 1192 1193 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1194 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1195 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1196 1197 return (error); 1198 } 1199 1200 /* 1201 * Validate parameters and get old parameters 1202 * for a structure oriented sysctl function. 1203 */ 1204 int 1205 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1206 size_t len) 1207 { 1208 int error = 0; 1209 1210 if (newp) 1211 return (EPERM); 1212 1213 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1214 1215 return (error); 1216 } 1217 1218 /* 1219 * As above, but can return a truncated result. 1220 */ 1221 int 1222 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1223 size_t len) 1224 { 1225 int error = 0; 1226 1227 if (newp) 1228 return (EPERM); 1229 1230 len = min(*oldlenp, len); 1231 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1232 1233 return (error); 1234 } 1235 1236 /* 1237 * Get file structures. 1238 */ 1239 static int 1240 sysctl_file(void *vwhere, size_t *sizep) 1241 { 1242 int error; 1243 size_t buflen; 1244 struct file *fp; 1245 char *start, *where; 1246 1247 start = where = vwhere; 1248 buflen = *sizep; 1249 if (where == NULL) { 1250 /* 1251 * overestimate by 10 files 1252 */ 1253 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1254 return (0); 1255 } 1256 1257 /* 1258 * first copyout filehead 1259 */ 1260 if (buflen < sizeof(filehead)) { 1261 *sizep = 0; 1262 return (0); 1263 } 1264 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1265 if (error) 1266 return (error); 1267 buflen -= sizeof(filehead); 1268 where += sizeof(filehead); 1269 1270 /* 1271 * followed by an array of file structures 1272 */ 1273 LIST_FOREACH(fp, &filehead, f_list) { 1274 if (buflen < sizeof(struct file)) { 1275 *sizep = where - start; 1276 return (ENOMEM); 1277 } 1278 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1279 if (error) 1280 return (error); 1281 buflen -= sizeof(struct file); 1282 where += sizeof(struct file); 1283 } 1284 *sizep = where - start; 1285 return (0); 1286 } 1287 1288 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1289 #define FILL_PERM(src, dst) do { \ 1290 (dst)._key = (src)._key; \ 1291 (dst).uid = (src).uid; \ 1292 (dst).gid = (src).gid; \ 1293 (dst).cuid = (src).cuid; \ 1294 (dst).cgid = (src).cgid; \ 1295 (dst).mode = (src).mode; \ 1296 (dst)._seq = (src)._seq; \ 1297 } while (/*CONSTCOND*/ 0); 1298 #define FILL_MSG(src, dst) do { \ 1299 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1300 (dst).msg_qnum = (src).msg_qnum; \ 1301 (dst).msg_qbytes = (src).msg_qbytes; \ 1302 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1303 (dst).msg_lspid = (src).msg_lspid; \ 1304 (dst).msg_lrpid = (src).msg_lrpid; \ 1305 (dst).msg_stime = (src).msg_stime; \ 1306 (dst).msg_rtime = (src).msg_rtime; \ 1307 (dst).msg_ctime = (src).msg_ctime; \ 1308 } while (/*CONSTCOND*/ 0) 1309 #define FILL_SEM(src, dst) do { \ 1310 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1311 (dst).sem_nsems = (src).sem_nsems; \ 1312 (dst).sem_otime = (src).sem_otime; \ 1313 (dst).sem_ctime = (src).sem_ctime; \ 1314 } while (/*CONSTCOND*/ 0) 1315 #define FILL_SHM(src, dst) do { \ 1316 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1317 (dst).shm_segsz = (src).shm_segsz; \ 1318 (dst).shm_lpid = (src).shm_lpid; \ 1319 (dst).shm_cpid = (src).shm_cpid; \ 1320 (dst).shm_atime = (src).shm_atime; \ 1321 (dst).shm_dtime = (src).shm_dtime; \ 1322 (dst).shm_ctime = (src).shm_ctime; \ 1323 (dst).shm_nattch = (src).shm_nattch; \ 1324 } while (/*CONSTCOND*/ 0) 1325 1326 static int 1327 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1328 { 1329 #ifdef SYSVMSG 1330 struct msg_sysctl_info *msgsi = NULL; 1331 #endif 1332 #ifdef SYSVSEM 1333 struct sem_sysctl_info *semsi = NULL; 1334 #endif 1335 #ifdef SYSVSHM 1336 struct shm_sysctl_info *shmsi = NULL; 1337 #endif 1338 size_t infosize, dssize, tsize, buflen; 1339 void *buf = NULL; 1340 char *start; 1341 int32_t nds; 1342 int i, error, ret; 1343 1344 if (namelen != 1) 1345 return (EINVAL); 1346 1347 start = where; 1348 buflen = *sizep; 1349 1350 switch (*name) { 1351 case KERN_SYSVIPC_MSG_INFO: 1352 #ifdef SYSVMSG 1353 infosize = sizeof(msgsi->msginfo); 1354 nds = msginfo.msgmni; 1355 dssize = sizeof(msgsi->msgids[0]); 1356 break; 1357 #else 1358 return (EINVAL); 1359 #endif 1360 case KERN_SYSVIPC_SEM_INFO: 1361 #ifdef SYSVSEM 1362 infosize = sizeof(semsi->seminfo); 1363 nds = seminfo.semmni; 1364 dssize = sizeof(semsi->semids[0]); 1365 break; 1366 #else 1367 return (EINVAL); 1368 #endif 1369 case KERN_SYSVIPC_SHM_INFO: 1370 #ifdef SYSVSHM 1371 infosize = sizeof(shmsi->shminfo); 1372 nds = shminfo.shmmni; 1373 dssize = sizeof(shmsi->shmids[0]); 1374 break; 1375 #else 1376 return (EINVAL); 1377 #endif 1378 default: 1379 return (EINVAL); 1380 } 1381 /* 1382 * Round infosize to 64 bit boundary if requesting more than just 1383 * the info structure or getting the total data size. 1384 */ 1385 if (where == NULL || *sizep > infosize) 1386 infosize = ((infosize + 7) / 8) * 8; 1387 tsize = infosize + nds * dssize; 1388 1389 /* Return just the total size required. */ 1390 if (where == NULL) { 1391 *sizep = tsize; 1392 return (0); 1393 } 1394 1395 /* Not enough room for even the info struct. */ 1396 if (buflen < infosize) { 1397 *sizep = 0; 1398 return (ENOMEM); 1399 } 1400 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1401 memset(buf, 0, min(tsize, buflen)); 1402 1403 switch (*name) { 1404 #ifdef SYSVMSG 1405 case KERN_SYSVIPC_MSG_INFO: 1406 msgsi = (struct msg_sysctl_info *)buf; 1407 msgsi->msginfo = msginfo; 1408 break; 1409 #endif 1410 #ifdef SYSVSEM 1411 case KERN_SYSVIPC_SEM_INFO: 1412 semsi = (struct sem_sysctl_info *)buf; 1413 semsi->seminfo = seminfo; 1414 break; 1415 #endif 1416 #ifdef SYSVSHM 1417 case KERN_SYSVIPC_SHM_INFO: 1418 shmsi = (struct shm_sysctl_info *)buf; 1419 shmsi->shminfo = shminfo; 1420 break; 1421 #endif 1422 } 1423 buflen -= infosize; 1424 1425 ret = 0; 1426 if (buflen > 0) { 1427 /* Fill in the IPC data structures. */ 1428 for (i = 0; i < nds; i++) { 1429 if (buflen < dssize) { 1430 ret = ENOMEM; 1431 break; 1432 } 1433 switch (*name) { 1434 #ifdef SYSVMSG 1435 case KERN_SYSVIPC_MSG_INFO: 1436 FILL_MSG(msqids[i], msgsi->msgids[i]); 1437 break; 1438 #endif 1439 #ifdef SYSVSEM 1440 case KERN_SYSVIPC_SEM_INFO: 1441 FILL_SEM(sema[i], semsi->semids[i]); 1442 break; 1443 #endif 1444 #ifdef SYSVSHM 1445 case KERN_SYSVIPC_SHM_INFO: 1446 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1447 break; 1448 #endif 1449 } 1450 buflen -= dssize; 1451 } 1452 } 1453 *sizep -= buflen; 1454 error = copyout(buf, start, *sizep); 1455 /* If copyout succeeded, use return code set earlier. */ 1456 if (error == 0) 1457 error = ret; 1458 if (buf) 1459 free(buf, M_TEMP); 1460 return (error); 1461 } 1462 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1463 1464 static int 1465 sysctl_msgbuf(void *vwhere, size_t *sizep) 1466 { 1467 char *where = vwhere; 1468 size_t len, maxlen = *sizep; 1469 long beg, end; 1470 int error; 1471 1472 /* 1473 * deal with cases where the message buffer has 1474 * become corrupted. 1475 */ 1476 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1477 msgbufenabled = 0; 1478 return (ENXIO); 1479 } 1480 1481 if (where == NULL) { 1482 /* always return full buffer size */ 1483 *sizep = msgbufp->msg_bufs; 1484 return (0); 1485 } 1486 1487 error = 0; 1488 maxlen = min(msgbufp->msg_bufs, maxlen); 1489 1490 /* 1491 * First, copy from the write pointer to the end of 1492 * message buffer. 1493 */ 1494 beg = msgbufp->msg_bufx; 1495 end = msgbufp->msg_bufs; 1496 while (maxlen > 0) { 1497 len = min(end - beg, maxlen); 1498 if (len == 0) 1499 break; 1500 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1501 if (error) 1502 break; 1503 where += len; 1504 maxlen -= len; 1505 1506 /* 1507 * ... then, copy from the beginning of message buffer to 1508 * the write pointer. 1509 */ 1510 beg = 0; 1511 end = msgbufp->msg_bufx; 1512 } 1513 return (error); 1514 } 1515 1516 /* 1517 * try over estimating by 5 procs 1518 */ 1519 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1520 1521 static int 1522 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1523 { 1524 struct eproc eproc; 1525 struct kinfo_proc2 kproc2; 1526 struct kinfo_proc *dp; 1527 struct proc *p; 1528 const struct proclist_desc *pd; 1529 char *where, *dp2; 1530 int type, op, arg; 1531 u_int elem_size, elem_count; 1532 size_t buflen, needed; 1533 int error; 1534 1535 dp = vwhere; 1536 dp2 = where = vwhere; 1537 buflen = where != NULL ? *sizep : 0; 1538 error = 0; 1539 needed = 0; 1540 type = name[0]; 1541 1542 if (type == KERN_PROC) { 1543 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1544 return (EINVAL); 1545 op = name[1]; 1546 if (op != KERN_PROC_ALL) 1547 arg = name[2]; 1548 else 1549 arg = 0; /* Quell compiler warning */ 1550 elem_size = elem_count = 0; /* Ditto */ 1551 } else { 1552 if (namelen != 5) 1553 return (EINVAL); 1554 op = name[1]; 1555 arg = name[2]; 1556 elem_size = name[3]; 1557 elem_count = name[4]; 1558 } 1559 1560 proclist_lock_read(); 1561 1562 pd = proclists; 1563 again: 1564 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1565 /* 1566 * Skip embryonic processes. 1567 */ 1568 if (p->p_stat == SIDL) 1569 continue; 1570 /* 1571 * TODO - make more efficient (see notes below). 1572 * do by session. 1573 */ 1574 switch (op) { 1575 1576 case KERN_PROC_PID: 1577 /* could do this with just a lookup */ 1578 if (p->p_pid != (pid_t)arg) 1579 continue; 1580 break; 1581 1582 case KERN_PROC_PGRP: 1583 /* could do this by traversing pgrp */ 1584 if (p->p_pgrp->pg_id != (pid_t)arg) 1585 continue; 1586 break; 1587 1588 case KERN_PROC_SESSION: 1589 if (p->p_session->s_sid != (pid_t)arg) 1590 continue; 1591 break; 1592 1593 case KERN_PROC_TTY: 1594 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1595 if ((p->p_flag & P_CONTROLT) == 0 || 1596 p->p_session->s_ttyp == NULL || 1597 p->p_session->s_ttyvp != NULL) 1598 continue; 1599 } else if ((p->p_flag & P_CONTROLT) == 0 || 1600 p->p_session->s_ttyp == NULL) { 1601 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1602 continue; 1603 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1604 continue; 1605 break; 1606 1607 case KERN_PROC_UID: 1608 if (p->p_ucred->cr_uid != (uid_t)arg) 1609 continue; 1610 break; 1611 1612 case KERN_PROC_RUID: 1613 if (p->p_cred->p_ruid != (uid_t)arg) 1614 continue; 1615 break; 1616 1617 case KERN_PROC_GID: 1618 if (p->p_ucred->cr_gid != (uid_t)arg) 1619 continue; 1620 break; 1621 1622 case KERN_PROC_RGID: 1623 if (p->p_cred->p_rgid != (uid_t)arg) 1624 continue; 1625 break; 1626 1627 case KERN_PROC_ALL: 1628 /* allow everything */ 1629 break; 1630 1631 default: 1632 error = EINVAL; 1633 goto cleanup; 1634 } 1635 if (type == KERN_PROC) { 1636 if (buflen >= sizeof(struct kinfo_proc)) { 1637 fill_eproc(p, &eproc); 1638 error = copyout((caddr_t)p, &dp->kp_proc, 1639 sizeof(struct proc)); 1640 if (error) 1641 goto cleanup; 1642 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1643 sizeof(eproc)); 1644 if (error) 1645 goto cleanup; 1646 dp++; 1647 buflen -= sizeof(struct kinfo_proc); 1648 } 1649 needed += sizeof(struct kinfo_proc); 1650 } else { /* KERN_PROC2 */ 1651 if (buflen >= elem_size && elem_count > 0) { 1652 fill_kproc2(p, &kproc2); 1653 /* 1654 * Copy out elem_size, but not larger than 1655 * the size of a struct kinfo_proc2. 1656 */ 1657 error = copyout(&kproc2, dp2, 1658 min(sizeof(kproc2), elem_size)); 1659 if (error) 1660 goto cleanup; 1661 dp2 += elem_size; 1662 buflen -= elem_size; 1663 elem_count--; 1664 } 1665 needed += elem_size; 1666 } 1667 } 1668 pd++; 1669 if (pd->pd_list != NULL) 1670 goto again; 1671 proclist_unlock_read(); 1672 1673 if (where != NULL) { 1674 if (type == KERN_PROC) 1675 *sizep = (caddr_t)dp - where; 1676 else 1677 *sizep = dp2 - where; 1678 if (needed > *sizep) 1679 return (ENOMEM); 1680 } else { 1681 needed += KERN_PROCSLOP; 1682 *sizep = needed; 1683 } 1684 return (0); 1685 cleanup: 1686 proclist_unlock_read(); 1687 return (error); 1688 } 1689 1690 1691 /* 1692 * try over estimating by 5 LWPs 1693 */ 1694 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1695 1696 static int 1697 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1698 { 1699 struct kinfo_lwp klwp; 1700 struct proc *p; 1701 struct lwp *l; 1702 char *where, *dp; 1703 int type, pid, elem_size, elem_count; 1704 int buflen, needed, error; 1705 1706 dp = where = vwhere; 1707 buflen = where != NULL ? *sizep : 0; 1708 error = needed = 0; 1709 type = name[0]; 1710 1711 if (namelen != 4) 1712 return (EINVAL); 1713 pid = name[1]; 1714 elem_size = name[2]; 1715 elem_count = name[3]; 1716 1717 p = pfind(pid); 1718 if (p == NULL) 1719 return (ESRCH); 1720 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1721 if (buflen >= elem_size && elem_count > 0) { 1722 fill_lwp(l, &klwp); 1723 /* 1724 * Copy out elem_size, but not larger than 1725 * the size of a struct kinfo_proc2. 1726 */ 1727 error = copyout(&klwp, dp, 1728 min(sizeof(klwp), elem_size)); 1729 if (error) 1730 goto cleanup; 1731 dp += elem_size; 1732 buflen -= elem_size; 1733 elem_count--; 1734 } 1735 needed += elem_size; 1736 } 1737 1738 if (where != NULL) { 1739 *sizep = dp - where; 1740 if (needed > *sizep) 1741 return (ENOMEM); 1742 } else { 1743 needed += KERN_PROCSLOP; 1744 *sizep = needed; 1745 } 1746 return (0); 1747 cleanup: 1748 return (error); 1749 } 1750 1751 /* 1752 * Fill in an eproc structure for the specified process. 1753 */ 1754 void 1755 fill_eproc(struct proc *p, struct eproc *ep) 1756 { 1757 struct tty *tp; 1758 struct lwp *l; 1759 1760 ep->e_paddr = p; 1761 ep->e_sess = p->p_session; 1762 ep->e_pcred = *p->p_cred; 1763 ep->e_ucred = *p->p_ucred; 1764 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1765 ep->e_vm.vm_rssize = 0; 1766 ep->e_vm.vm_tsize = 0; 1767 ep->e_vm.vm_dsize = 0; 1768 ep->e_vm.vm_ssize = 0; 1769 /* ep->e_vm.vm_pmap = XXX; */ 1770 } else { 1771 struct vmspace *vm = p->p_vmspace; 1772 1773 ep->e_vm.vm_rssize = vm_resident_count(vm); 1774 ep->e_vm.vm_tsize = vm->vm_tsize; 1775 ep->e_vm.vm_dsize = vm->vm_dsize; 1776 ep->e_vm.vm_ssize = vm->vm_ssize; 1777 1778 /* Pick a "representative" LWP */ 1779 l = proc_representative_lwp(p); 1780 1781 if (l->l_wmesg) 1782 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1783 } 1784 if (p->p_pptr) 1785 ep->e_ppid = p->p_pptr->p_pid; 1786 else 1787 ep->e_ppid = 0; 1788 ep->e_pgid = p->p_pgrp->pg_id; 1789 ep->e_sid = ep->e_sess->s_sid; 1790 ep->e_jobc = p->p_pgrp->pg_jobc; 1791 if ((p->p_flag & P_CONTROLT) && 1792 (tp = ep->e_sess->s_ttyp)) { 1793 ep->e_tdev = tp->t_dev; 1794 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1795 ep->e_tsess = tp->t_session; 1796 } else 1797 ep->e_tdev = NODEV; 1798 1799 ep->e_xsize = ep->e_xrssize = 0; 1800 ep->e_xccount = ep->e_xswrss = 0; 1801 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1802 if (SESS_LEADER(p)) 1803 ep->e_flag |= EPROC_SLEADER; 1804 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1805 } 1806 1807 /* 1808 * Fill in an eproc structure for the specified process. 1809 */ 1810 static void 1811 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1812 { 1813 struct tty *tp; 1814 struct lwp *l; 1815 struct timeval ut, st; 1816 1817 memset(ki, 0, sizeof(*ki)); 1818 1819 ki->p_paddr = PTRTOINT64(p); 1820 ki->p_fd = PTRTOINT64(p->p_fd); 1821 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1822 ki->p_stats = PTRTOINT64(p->p_stats); 1823 ki->p_limit = PTRTOINT64(p->p_limit); 1824 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1825 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1826 ki->p_sess = PTRTOINT64(p->p_session); 1827 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1828 ki->p_ru = PTRTOINT64(p->p_ru); 1829 1830 ki->p_eflag = 0; 1831 ki->p_exitsig = p->p_exitsig; 1832 ki->p_flag = p->p_flag; 1833 1834 ki->p_pid = p->p_pid; 1835 if (p->p_pptr) 1836 ki->p_ppid = p->p_pptr->p_pid; 1837 else 1838 ki->p_ppid = 0; 1839 ki->p_sid = p->p_session->s_sid; 1840 ki->p__pgid = p->p_pgrp->pg_id; 1841 1842 ki->p_tpgid = NO_PGID; /* may be changed if controlling tty below */ 1843 1844 ki->p_uid = p->p_ucred->cr_uid; 1845 ki->p_ruid = p->p_cred->p_ruid; 1846 ki->p_gid = p->p_ucred->cr_gid; 1847 ki->p_rgid = p->p_cred->p_rgid; 1848 ki->p_svuid = p->p_cred->p_svuid; 1849 ki->p_svgid = p->p_cred->p_svgid; 1850 1851 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1852 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1853 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1854 1855 ki->p_jobc = p->p_pgrp->pg_jobc; 1856 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1857 ki->p_tdev = tp->t_dev; 1858 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1859 ki->p_tsess = PTRTOINT64(tp->t_session); 1860 } else { 1861 ki->p_tdev = NODEV; 1862 } 1863 1864 ki->p_estcpu = p->p_estcpu; 1865 ki->p_rtime_sec = p->p_rtime.tv_sec; 1866 ki->p_rtime_usec = p->p_rtime.tv_usec; 1867 ki->p_cpticks = p->p_cpticks; 1868 ki->p_pctcpu = p->p_pctcpu; 1869 1870 ki->p_uticks = p->p_uticks; 1871 ki->p_sticks = p->p_sticks; 1872 ki->p_iticks = p->p_iticks; 1873 1874 ki->p_tracep = PTRTOINT64(p->p_tracep); 1875 ki->p_traceflag = p->p_traceflag; 1876 1877 1878 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1879 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1880 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1881 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1882 1883 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1884 ki->p_realstat = p->p_stat; 1885 ki->p_nice = p->p_nice; 1886 1887 ki->p_xstat = p->p_xstat; 1888 ki->p_acflag = p->p_acflag; 1889 1890 strncpy(ki->p_comm, p->p_comm, 1891 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1892 1893 strncpy(ki->p_login, p->p_session->s_login, 1894 min(sizeof ki->p_login - 1, sizeof p->p_session->s_login)); 1895 1896 ki->p_nlwps = p->p_nlwps; 1897 ki->p_nrlwps = p->p_nrlwps; 1898 ki->p_realflag = p->p_flag; 1899 1900 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1901 ki->p_vm_rssize = 0; 1902 ki->p_vm_tsize = 0; 1903 ki->p_vm_dsize = 0; 1904 ki->p_vm_ssize = 0; 1905 l = NULL; 1906 } else { 1907 struct vmspace *vm = p->p_vmspace; 1908 1909 ki->p_vm_rssize = vm_resident_count(vm); 1910 ki->p_vm_tsize = vm->vm_tsize; 1911 ki->p_vm_dsize = vm->vm_dsize; 1912 ki->p_vm_ssize = vm->vm_ssize; 1913 1914 /* Pick a "representative" LWP */ 1915 l = proc_representative_lwp(p); 1916 ki->p_forw = PTRTOINT64(l->l_forw); 1917 ki->p_back = PTRTOINT64(l->l_back); 1918 ki->p_addr = PTRTOINT64(l->l_addr); 1919 ki->p_stat = l->l_stat; 1920 ki->p_flag |= l->l_flag; 1921 ki->p_swtime = l->l_swtime; 1922 ki->p_slptime = l->l_slptime; 1923 if (l->l_stat == LSONPROC) { 1924 KDASSERT(l->l_cpu != NULL); 1925 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1926 } else 1927 ki->p_schedflags = 0; 1928 ki->p_holdcnt = l->l_holdcnt; 1929 ki->p_priority = l->l_priority; 1930 ki->p_usrpri = l->l_usrpri; 1931 if (l->l_wmesg) 1932 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1933 ki->p_wchan = PTRTOINT64(l->l_wchan); 1934 1935 } 1936 1937 if (p->p_session->s_ttyvp) 1938 ki->p_eflag |= EPROC_CTTY; 1939 if (SESS_LEADER(p)) 1940 ki->p_eflag |= EPROC_SLEADER; 1941 1942 /* XXX Is this double check necessary? */ 1943 if (P_ZOMBIE(p)) { 1944 ki->p_uvalid = 0; 1945 } else { 1946 ki->p_uvalid = 1; 1947 1948 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1949 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1950 1951 calcru(p, &ut, &st, 0); 1952 ki->p_uutime_sec = ut.tv_sec; 1953 ki->p_uutime_usec = ut.tv_usec; 1954 ki->p_ustime_sec = st.tv_sec; 1955 ki->p_ustime_usec = st.tv_usec; 1956 1957 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1958 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1959 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1960 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1961 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1962 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1963 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1964 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1965 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1966 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1967 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1968 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1969 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1970 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1971 1972 timeradd(&p->p_stats->p_cru.ru_utime, 1973 &p->p_stats->p_cru.ru_stime, &ut); 1974 ki->p_uctime_sec = ut.tv_sec; 1975 ki->p_uctime_usec = ut.tv_usec; 1976 } 1977 #ifdef MULTIPROCESSOR 1978 if (l && l->l_cpu != NULL) 1979 ki->p_cpuid = l->l_cpu->ci_cpuid; 1980 else 1981 #endif 1982 ki->p_cpuid = KI_NOCPU; 1983 1984 } 1985 1986 /* 1987 * Fill in a kinfo_lwp structure for the specified lwp. 1988 */ 1989 static void 1990 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1991 { 1992 1993 kl->l_forw = PTRTOINT64(l->l_forw); 1994 kl->l_back = PTRTOINT64(l->l_back); 1995 kl->l_laddr = PTRTOINT64(l); 1996 kl->l_addr = PTRTOINT64(l->l_addr); 1997 kl->l_stat = l->l_stat; 1998 kl->l_lid = l->l_lid; 1999 kl->l_flag = l->l_flag; 2000 2001 kl->l_swtime = l->l_swtime; 2002 kl->l_slptime = l->l_slptime; 2003 if (l->l_stat == LSONPROC) { 2004 KDASSERT(l->l_cpu != NULL); 2005 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 2006 } else 2007 kl->l_schedflags = 0; 2008 kl->l_holdcnt = l->l_holdcnt; 2009 kl->l_priority = l->l_priority; 2010 kl->l_usrpri = l->l_usrpri; 2011 if (l->l_wmesg) 2012 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 2013 kl->l_wchan = PTRTOINT64(l->l_wchan); 2014 #ifdef MULTIPROCESSOR 2015 if (l->l_cpu != NULL) 2016 kl->l_cpuid = l->l_cpu->ci_cpuid; 2017 else 2018 #endif 2019 kl->l_cpuid = KI_NOCPU; 2020 } 2021 2022 int 2023 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 2024 struct proc *up) 2025 { 2026 struct ps_strings pss; 2027 struct proc *p; 2028 size_t len, upper_bound, xlen, i; 2029 struct uio auio; 2030 struct iovec aiov; 2031 vaddr_t argv; 2032 pid_t pid; 2033 int nargv, type, error; 2034 char *arg; 2035 char *tmp; 2036 2037 if (namelen != 2) 2038 return (EINVAL); 2039 pid = name[0]; 2040 type = name[1]; 2041 2042 switch (type) { 2043 case KERN_PROC_ARGV: 2044 case KERN_PROC_NARGV: 2045 case KERN_PROC_ENV: 2046 case KERN_PROC_NENV: 2047 /* ok */ 2048 break; 2049 default: 2050 return (EINVAL); 2051 } 2052 2053 /* check pid */ 2054 if ((p = pfind(pid)) == NULL) 2055 return (EINVAL); 2056 2057 /* only root or same user change look at the environment */ 2058 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 2059 if (up->p_ucred->cr_uid != 0) { 2060 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 2061 up->p_cred->p_ruid != p->p_cred->p_svuid) 2062 return (EPERM); 2063 } 2064 } 2065 2066 if (sizep != NULL && where == NULL) { 2067 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 2068 *sizep = sizeof (int); 2069 else 2070 *sizep = ARG_MAX; /* XXX XXX XXX */ 2071 return (0); 2072 } 2073 if (where == NULL || sizep == NULL) 2074 return (EINVAL); 2075 2076 /* 2077 * Zombies don't have a stack, so we can't read their psstrings. 2078 * System processes also don't have a user stack. 2079 */ 2080 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 2081 return (EINVAL); 2082 2083 /* 2084 * Lock the process down in memory. 2085 */ 2086 /* XXXCDC: how should locking work here? */ 2087 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 2088 return (EFAULT); 2089 2090 p->p_vmspace->vm_refcnt++; /* XXX */ 2091 2092 /* 2093 * Allocate a temporary buffer to hold the arguments. 2094 */ 2095 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2096 2097 /* 2098 * Read in the ps_strings structure. 2099 */ 2100 aiov.iov_base = &pss; 2101 aiov.iov_len = sizeof(pss); 2102 auio.uio_iov = &aiov; 2103 auio.uio_iovcnt = 1; 2104 auio.uio_offset = (vaddr_t)p->p_psstr; 2105 auio.uio_resid = sizeof(pss); 2106 auio.uio_segflg = UIO_SYSSPACE; 2107 auio.uio_rw = UIO_READ; 2108 auio.uio_lwp = NULL; 2109 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2110 if (error) 2111 goto done; 2112 2113 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2114 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2115 else 2116 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2117 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2118 error = copyout(&nargv, where, sizeof(nargv)); 2119 *sizep = sizeof(nargv); 2120 goto done; 2121 } 2122 /* 2123 * Now read the address of the argument vector. 2124 */ 2125 switch (type) { 2126 case KERN_PROC_ARGV: 2127 /* XXX compat32 stuff here */ 2128 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2129 break; 2130 case KERN_PROC_ENV: 2131 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2132 break; 2133 default: 2134 return (EINVAL); 2135 } 2136 auio.uio_offset = (off_t)(long)tmp; 2137 aiov.iov_base = &argv; 2138 aiov.iov_len = sizeof(argv); 2139 auio.uio_iov = &aiov; 2140 auio.uio_iovcnt = 1; 2141 auio.uio_resid = sizeof(argv); 2142 auio.uio_segflg = UIO_SYSSPACE; 2143 auio.uio_rw = UIO_READ; 2144 auio.uio_lwp = NULL; 2145 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2146 if (error) 2147 goto done; 2148 2149 /* 2150 * Now copy in the actual argument vector, one page at a time, 2151 * since we don't know how long the vector is (though, we do 2152 * know how many NUL-terminated strings are in the vector). 2153 */ 2154 len = 0; 2155 upper_bound = *sizep; 2156 for (; nargv != 0 && len < upper_bound; len += xlen) { 2157 aiov.iov_base = arg; 2158 aiov.iov_len = PAGE_SIZE; 2159 auio.uio_iov = &aiov; 2160 auio.uio_iovcnt = 1; 2161 auio.uio_offset = argv + len; 2162 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2163 auio.uio_resid = xlen; 2164 auio.uio_segflg = UIO_SYSSPACE; 2165 auio.uio_rw = UIO_READ; 2166 auio.uio_lwp = NULL; 2167 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2168 if (error) 2169 goto done; 2170 2171 for (i = 0; i < xlen && nargv != 0; i++) { 2172 if (arg[i] == '\0') 2173 nargv--; /* one full string */ 2174 } 2175 2176 /* 2177 * Make sure we don't copyout past the end of the user's 2178 * buffer. 2179 */ 2180 if (len + i > upper_bound) 2181 i = upper_bound - len; 2182 2183 error = copyout(arg, (char *)where + len, i); 2184 if (error) 2185 break; 2186 2187 if (nargv == 0) { 2188 len += i; 2189 break; 2190 } 2191 } 2192 *sizep = len; 2193 2194 done: 2195 uvmspace_free(p->p_vmspace); 2196 2197 free(arg, M_TEMP); 2198 return (error); 2199 } 2200 2201 #if NPTY > 0 2202 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2203 2204 /* 2205 * Validate parameters and get old / set new parameters 2206 * for pty sysctl function. 2207 */ 2208 static int 2209 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2210 { 2211 int error = 0; 2212 int oldmax = 0, newmax = 0; 2213 2214 /* get current value of maxptys */ 2215 oldmax = pty_maxptys(0, 0); 2216 2217 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2218 2219 if (!error && newp) { 2220 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2221 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2222 2223 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2224 return (EINVAL); 2225 2226 } 2227 2228 return (error); 2229 } 2230 #endif /* NPTY > 0 */ 2231 2232 static int 2233 sysctl_dotkstat(int *name, u_int namelen, void *where, size_t *sizep, 2234 void *newp) 2235 { 2236 2237 /* all sysctl names at this level are terminal */ 2238 if (namelen != 1) 2239 return (ENOTDIR); /* overloaded */ 2240 2241 switch (name[0]) { 2242 case KERN_TKSTAT_NIN: 2243 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2244 case KERN_TKSTAT_NOUT: 2245 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2246 case KERN_TKSTAT_CANCC: 2247 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2248 case KERN_TKSTAT_RAWCC: 2249 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2250 default: 2251 return (EOPNOTSUPP); 2252 } 2253 } 2254
Indexes created Tue Sep 30 11:09:46 GMT 2025