kern_sysctl.c revision 1.109
1 /* $NetBSD: kern_sysctl.c,v 1.109 2002/07/02 17:06:17 itojun 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 1.109 2002/07/02 17:06:17 itojun Exp $"); 47 48 #include "opt_ddb.h" 49 #include "opt_insecure.h" 50 #include "opt_defcorename.h" 51 #include "opt_pipe.h" 52 #include "opt_sysv.h" 53 #include "pty.h" 54 #include "rnd.h" 55 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/kernel.h> 59 #include <sys/buf.h> 60 #include <sys/device.h> 61 #include <sys/disklabel.h> 62 #include <sys/dkstat.h> 63 #include <sys/exec.h> 64 #include <sys/file.h> 65 #include <sys/ioctl.h> 66 #include <sys/malloc.h> 67 #include <sys/mount.h> 68 #include <sys/msgbuf.h> 69 #include <sys/pool.h> 70 #include <sys/proc.h> 71 #include <sys/resource.h> 72 #include <sys/resourcevar.h> 73 #include <sys/syscallargs.h> 74 #include <sys/tty.h> 75 #include <sys/unistd.h> 76 #include <sys/vnode.h> 77 #include <sys/socketvar.h> 78 #define __SYSCTL_PRIVATE 79 #include <sys/sysctl.h> 80 #include <sys/lock.h> 81 #include <sys/namei.h> 82 83 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 84 #include <sys/ipc.h> 85 #endif 86 #ifdef SYSVMSG 87 #include <sys/msg.h> 88 #endif 89 #ifdef SYSVSEM 90 #include <sys/sem.h> 91 #endif 92 #ifdef SYSVSHM 93 #include <sys/shm.h> 94 #endif 95 96 #include <dev/cons.h> 97 98 #if defined(DDB) 99 #include <ddb/ddbvar.h> 100 #endif 101 102 #ifndef PIPE_SOCKETPAIR 103 #include <sys/pipe.h> 104 #endif 105 106 #if NRND > 0 107 #include <sys/rnd.h> 108 #endif 109 110 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 111 112 static int sysctl_file(void *, size_t *); 113 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 114 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 115 #endif 116 static int sysctl_msgbuf(void *, size_t *); 117 static int sysctl_doeproc(int *, u_int, void *, size_t *); 118 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 119 #ifdef MULTIPROCESSOR 120 static int sysctl_docptime(void *, size_t *, void *); 121 static int sysctl_ncpus(void); 122 #endif 123 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 124 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 125 #if NPTY > 0 126 static int sysctl_pty(void *, size_t *, void *, size_t); 127 #endif 128 129 /* 130 * The `sysctl_memlock' is intended to keep too many processes from 131 * locking down memory by doing sysctls at once. Whether or not this 132 * is really a good idea to worry about it probably a subject of some 133 * debate. 134 */ 135 struct lock sysctl_memlock; 136 137 void 138 sysctl_init(void) 139 { 140 141 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 142 } 143 144 int 145 sys___sysctl(struct proc *p, void *v, register_t *retval) 146 { 147 struct sys___sysctl_args /* { 148 syscallarg(int *) name; 149 syscallarg(u_int) namelen; 150 syscallarg(void *) old; 151 syscallarg(size_t *) oldlenp; 152 syscallarg(void *) new; 153 syscallarg(size_t) newlen; 154 } */ *uap = v; 155 int error; 156 size_t savelen = 0, oldlen = 0; 157 sysctlfn *fn; 158 int name[CTL_MAXNAME]; 159 size_t *oldlenp; 160 161 /* 162 * all top-level sysctl names are non-terminal 163 */ 164 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 165 return (EINVAL); 166 error = copyin(SCARG(uap, name), &name, 167 SCARG(uap, namelen) * sizeof(int)); 168 if (error) 169 return (error); 170 171 /* 172 * For all but CTL_PROC, must be root to change a value. 173 * For CTL_PROC, must be root, or owner of the proc (and not suid), 174 * this is checked in proc_sysctl() (once we know the targer proc). 175 */ 176 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 177 (error = suser(p->p_ucred, &p->p_acflag))) 178 return error; 179 180 switch (name[0]) { 181 case CTL_KERN: 182 fn = kern_sysctl; 183 break; 184 case CTL_HW: 185 fn = hw_sysctl; 186 break; 187 case CTL_VM: 188 fn = uvm_sysctl; 189 break; 190 case CTL_NET: 191 fn = net_sysctl; 192 break; 193 case CTL_VFS: 194 fn = vfs_sysctl; 195 break; 196 case CTL_MACHDEP: 197 fn = cpu_sysctl; 198 break; 199 #ifdef DEBUG 200 case CTL_DEBUG: 201 fn = debug_sysctl; 202 break; 203 #endif 204 #ifdef DDB 205 case CTL_DDB: 206 fn = ddb_sysctl; 207 break; 208 #endif 209 case CTL_PROC: 210 fn = proc_sysctl; 211 break; 212 213 case CTL_EMUL: 214 fn = emul_sysctl; 215 break; 216 default: 217 return (EOPNOTSUPP); 218 } 219 220 /* 221 * XXX Hey, we wire `old', but what about `new'? 222 */ 223 224 oldlenp = SCARG(uap, oldlenp); 225 if (oldlenp) { 226 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 227 return (error); 228 oldlenp = &oldlen; 229 } 230 if (SCARG(uap, old) != NULL) { 231 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 232 if (error) 233 return (error); 234 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 235 if (error) { 236 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 237 return error; 238 } 239 savelen = oldlen; 240 } 241 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 242 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 243 if (SCARG(uap, old) != NULL) { 244 uvm_vsunlock(p, SCARG(uap, old), savelen); 245 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 246 } 247 if (error) 248 return (error); 249 if (SCARG(uap, oldlenp)) 250 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 251 return (error); 252 } 253 254 /* 255 * Attributes stored in the kernel. 256 */ 257 char hostname[MAXHOSTNAMELEN]; 258 int hostnamelen; 259 260 char domainname[MAXHOSTNAMELEN]; 261 int domainnamelen; 262 263 long hostid; 264 265 #ifdef INSECURE 266 int securelevel = -1; 267 #else 268 int securelevel = 0; 269 #endif 270 271 #ifndef DEFCORENAME 272 #define DEFCORENAME "%n.core" 273 #endif 274 char defcorename[MAXPATHLEN] = DEFCORENAME; 275 int defcorenamelen = sizeof(DEFCORENAME); 276 277 extern int kern_logsigexit; 278 extern fixpt_t ccpu; 279 280 #ifndef MULTIPROCESSOR 281 #define sysctl_ncpus() 1 282 #endif 283 284 #ifdef MULTIPROCESSOR 285 286 #ifndef CPU_INFO_FOREACH 287 #define CPU_INFO_ITERATOR int 288 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 289 #endif 290 291 static int 292 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 293 { 294 u_int64_t cp_time[CPUSTATES]; 295 int i; 296 struct cpu_info *ci; 297 CPU_INFO_ITERATOR cii; 298 299 for (i=0; i<CPUSTATES; i++) 300 cp_time[i] = 0; 301 302 for (CPU_INFO_FOREACH(cii, ci)) { 303 for (i=0; i<CPUSTATES; i++) 304 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 305 } 306 return (sysctl_rdstruct(oldp, oldlenp, newp, 307 cp_time, sizeof(cp_time))); 308 } 309 310 static int 311 sysctl_ncpus(void) 312 { 313 struct cpu_info *ci; 314 CPU_INFO_ITERATOR cii; 315 316 int ncpus = 0; 317 for (CPU_INFO_FOREACH(cii, ci)) 318 ncpus++; 319 return ncpus; 320 } 321 322 #endif 323 324 /* 325 * kernel related system variables. 326 */ 327 int 328 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 329 void *newp, size_t newlen, struct proc *p) 330 { 331 int error, level, inthostid; 332 int old_autonicetime; 333 int old_vnodes; 334 dev_t consdev; 335 #if NRND > 0 336 int v; 337 #endif 338 339 /* All sysctl names at this level, except for a few, are terminal. */ 340 switch (name[0]) { 341 case KERN_PROC: 342 case KERN_PROC2: 343 case KERN_PROF: 344 case KERN_MBUF: 345 case KERN_PROC_ARGS: 346 case KERN_SYSVIPC_INFO: 347 case KERN_PIPE: 348 case KERN_TKSTAT: 349 /* Not terminal. */ 350 break; 351 default: 352 if (namelen != 1) 353 return (ENOTDIR); /* overloaded */ 354 } 355 356 switch (name[0]) { 357 case KERN_OSTYPE: 358 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 359 case KERN_OSRELEASE: 360 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 361 case KERN_OSREV: 362 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 363 case KERN_VERSION: 364 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 365 case KERN_MAXVNODES: 366 old_vnodes = desiredvnodes; 367 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 368 if (newp && !error) { 369 if (old_vnodes > desiredvnodes) { 370 desiredvnodes = old_vnodes; 371 return (EINVAL); 372 } 373 vfs_reinit(); 374 nchreinit(); 375 } 376 return (error); 377 case KERN_MAXPROC: 378 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 379 case KERN_MAXFILES: 380 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 381 case KERN_ARGMAX: 382 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 383 case KERN_SECURELVL: 384 level = securelevel; 385 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 386 newp == NULL) 387 return (error); 388 if (level < securelevel && p->p_pid != 1) 389 return (EPERM); 390 securelevel = level; 391 return (0); 392 case KERN_HOSTNAME: 393 error = sysctl_string(oldp, oldlenp, newp, newlen, 394 hostname, sizeof(hostname)); 395 if (newp && !error) 396 hostnamelen = newlen; 397 return (error); 398 case KERN_DOMAINNAME: 399 error = sysctl_string(oldp, oldlenp, newp, newlen, 400 domainname, sizeof(domainname)); 401 if (newp && !error) 402 domainnamelen = newlen; 403 return (error); 404 case KERN_HOSTID: 405 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 406 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 407 if (newp && !error) 408 hostid = inthostid; 409 return (error); 410 case KERN_CLOCKRATE: 411 return (sysctl_clockrate(oldp, oldlenp)); 412 case KERN_BOOTTIME: 413 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 414 sizeof(struct timeval))); 415 case KERN_VNODE: 416 return (sysctl_vnode(oldp, oldlenp, p)); 417 case KERN_PROC: 418 case KERN_PROC2: 419 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 420 case KERN_PROC_ARGS: 421 return (sysctl_procargs(name + 1, namelen - 1, 422 oldp, oldlenp, p)); 423 case KERN_FILE: 424 return (sysctl_file(oldp, oldlenp)); 425 #ifdef GPROF 426 case KERN_PROF: 427 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 428 newp, newlen)); 429 #endif 430 case KERN_POSIX1: 431 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 432 case KERN_NGROUPS: 433 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 434 case KERN_JOB_CONTROL: 435 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 436 case KERN_SAVED_IDS: 437 #ifdef _POSIX_SAVED_IDS 438 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 439 #else 440 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 441 #endif 442 case KERN_MAXPARTITIONS: 443 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 444 case KERN_RAWPARTITION: 445 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 446 #ifdef NTP 447 case KERN_NTPTIME: 448 return (sysctl_ntptime(oldp, oldlenp)); 449 #endif 450 case KERN_AUTONICETIME: 451 old_autonicetime = autonicetime; 452 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 453 if (autonicetime < 0) 454 autonicetime = old_autonicetime; 455 return (error); 456 case KERN_AUTONICEVAL: 457 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 458 if (autoniceval < PRIO_MIN) 459 autoniceval = PRIO_MIN; 460 if (autoniceval > PRIO_MAX) 461 autoniceval = PRIO_MAX; 462 return (error); 463 case KERN_RTC_OFFSET: 464 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 465 case KERN_ROOT_DEVICE: 466 return (sysctl_rdstring(oldp, oldlenp, newp, 467 root_device->dv_xname)); 468 case KERN_MSGBUFSIZE: 469 /* 470 * deal with cases where the message buffer has 471 * become corrupted. 472 */ 473 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 474 msgbufenabled = 0; 475 return (ENXIO); 476 } 477 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 478 case KERN_FSYNC: 479 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 480 case KERN_SYSVMSG: 481 #ifdef SYSVMSG 482 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 483 #else 484 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 485 #endif 486 case KERN_SYSVSEM: 487 #ifdef SYSVSEM 488 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 489 #else 490 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 491 #endif 492 case KERN_SYSVSHM: 493 #ifdef SYSVSHM 494 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 495 #else 496 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 497 #endif 498 case KERN_DEFCORENAME: 499 if (newp && newlen < 1) 500 return (EINVAL); 501 error = sysctl_string(oldp, oldlenp, newp, newlen, 502 defcorename, sizeof(defcorename)); 503 if (newp && !error) 504 defcorenamelen = newlen; 505 return (error); 506 case KERN_SYNCHRONIZED_IO: 507 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 508 case KERN_IOV_MAX: 509 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 510 case KERN_MBUF: 511 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 512 newp, newlen)); 513 case KERN_MAPPED_FILES: 514 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 515 case KERN_MEMLOCK: 516 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 517 case KERN_MEMLOCK_RANGE: 518 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 519 case KERN_MEMORY_PROTECTION: 520 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 521 case KERN_LOGIN_NAME_MAX: 522 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 523 case KERN_LOGSIGEXIT: 524 return (sysctl_int(oldp, oldlenp, newp, newlen, 525 &kern_logsigexit)); 526 case KERN_FSCALE: 527 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 528 case KERN_CCPU: 529 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 530 case KERN_CP_TIME: 531 #ifndef MULTIPROCESSOR 532 return (sysctl_rdstruct(oldp, oldlenp, newp, 533 curcpu()->ci_schedstate.spc_cp_time, 534 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 535 #else 536 return (sysctl_docptime(oldp, oldlenp, newp)); 537 #endif 538 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 539 case KERN_SYSVIPC_INFO: 540 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 541 #endif 542 case KERN_MSGBUF: 543 return (sysctl_msgbuf(oldp, oldlenp)); 544 case KERN_CONSDEV: 545 if (cn_tab != NULL) 546 consdev = cn_tab->cn_dev; 547 else 548 consdev = NODEV; 549 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 550 sizeof consdev)); 551 #if NPTY > 0 552 case KERN_MAXPTYS: 553 return sysctl_pty(oldp, oldlenp, newp, newlen); 554 #endif 555 #ifndef PIPE_SOCKETPAIR 556 case KERN_PIPE: 557 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 558 newp, newlen)); 559 #endif 560 case KERN_MAXPHYS: 561 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 562 case KERN_SBMAX: 563 { 564 int new_sbmax = sb_max; 565 566 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 567 if (newp && !error) { 568 if (new_sbmax < (16 * 1024)) /* sanity */ 569 return (EINVAL); 570 sb_max = new_sbmax; 571 } 572 return (error); 573 } 574 case KERN_TKSTAT: 575 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 576 newp)); 577 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 578 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 579 case KERN_URND: 580 #if NRND > 0 581 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 582 sizeof(v)) 583 return (sysctl_rdint(oldp, oldlenp, newp, v)); 584 else 585 return (EIO); /*XXX*/ 586 #else 587 return (EOPNOTSUPP); 588 #endif 589 default: 590 return (EOPNOTSUPP); 591 } 592 /* NOTREACHED */ 593 } 594 595 /* 596 * hardware related system variables. 597 */ 598 int 599 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 600 void *newp, size_t newlen, struct proc *p) 601 { 602 603 /* All sysctl names at this level, except for a few, are terminal. */ 604 switch (name[0]) { 605 case HW_DISKSTATS: 606 /* Not terminal. */ 607 break; 608 default: 609 if (namelen != 1) 610 return (ENOTDIR); /* overloaded */ 611 } 612 613 switch (name[0]) { 614 case HW_MACHINE: 615 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 616 case HW_MACHINE_ARCH: 617 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 618 case HW_MODEL: 619 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 620 case HW_NCPU: 621 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 622 case HW_BYTEORDER: 623 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 624 case HW_PHYSMEM: 625 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 626 case HW_USERMEM: 627 return (sysctl_rdint(oldp, oldlenp, newp, 628 ctob(physmem - uvmexp.wired))); 629 case HW_PAGESIZE: 630 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 631 case HW_ALIGNBYTES: 632 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 633 case HW_DISKNAMES: 634 return (sysctl_disknames(oldp, oldlenp)); 635 case HW_DISKSTATS: 636 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 637 case HW_CNMAGIC: { 638 char magic[CNS_LEN]; 639 int error; 640 641 if (oldp) 642 cn_get_magic(magic, CNS_LEN); 643 error = sysctl_string(oldp, oldlenp, newp, newlen, 644 magic, sizeof(magic)); 645 if (newp && !error) { 646 error = cn_set_magic(magic); 647 } 648 return (error); 649 } 650 default: 651 return (EOPNOTSUPP); 652 } 653 /* NOTREACHED */ 654 } 655 656 #ifdef DEBUG 657 /* 658 * Debugging related system variables. 659 */ 660 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 661 struct ctldebug debug5, debug6, debug7, debug8, debug9; 662 struct ctldebug debug10, debug11, debug12, debug13, debug14; 663 struct ctldebug debug15, debug16, debug17, debug18, debug19; 664 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 665 &debug0, &debug1, &debug2, &debug3, &debug4, 666 &debug5, &debug6, &debug7, &debug8, &debug9, 667 &debug10, &debug11, &debug12, &debug13, &debug14, 668 &debug15, &debug16, &debug17, &debug18, &debug19, 669 }; 670 671 int 672 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 673 void *newp, size_t newlen, struct proc *p) 674 { 675 struct ctldebug *cdp; 676 677 /* all sysctl names at this level are name and field */ 678 if (namelen != 2) 679 return (ENOTDIR); /* overloaded */ 680 if (name[0] >= CTL_DEBUG_MAXID) 681 return (EOPNOTSUPP); 682 cdp = debugvars[name[0]]; 683 if (cdp->debugname == 0) 684 return (EOPNOTSUPP); 685 switch (name[1]) { 686 case CTL_DEBUG_NAME: 687 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 688 case CTL_DEBUG_VALUE: 689 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 690 default: 691 return (EOPNOTSUPP); 692 } 693 /* NOTREACHED */ 694 } 695 #endif /* DEBUG */ 696 697 int 698 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 699 void *newp, size_t newlen, struct proc *p) 700 { 701 struct proc *ptmp = NULL; 702 const struct proclist_desc *pd; 703 int error = 0; 704 struct rlimit alim; 705 struct plimit *newplim; 706 char *tmps = NULL; 707 int i, curlen, len; 708 709 if (namelen < 2) 710 return EINVAL; 711 712 if (name[0] == PROC_CURPROC) { 713 ptmp = p; 714 } else { 715 proclist_lock_read(); 716 for (pd = proclists; pd->pd_list != NULL; pd++) { 717 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 718 ptmp = LIST_NEXT(ptmp, p_list)) { 719 /* Skip embryonic processes. */ 720 if (ptmp->p_stat == SIDL) 721 continue; 722 if (ptmp->p_pid == (pid_t)name[0]) 723 break; 724 } 725 if (ptmp != NULL) 726 break; 727 } 728 proclist_unlock_read(); 729 if (ptmp == NULL) 730 return(ESRCH); 731 if (p->p_ucred->cr_uid != 0) { 732 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 733 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 734 return EPERM; 735 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 736 return EPERM; /* sgid proc */ 737 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 738 if (p->p_ucred->cr_groups[i] == 739 ptmp->p_cred->p_rgid) 740 break; 741 } 742 if (i == p->p_ucred->cr_ngroups) 743 return EPERM; 744 } 745 } 746 if (name[1] == PROC_PID_CORENAME) { 747 if (namelen != 2) 748 return EINVAL; 749 /* 750 * Can't use sysctl_string() here because we may malloc a new 751 * area during the process, so we have to do it by hand. 752 */ 753 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 754 if (oldlenp && *oldlenp < curlen) { 755 if (!oldp) 756 *oldlenp = curlen; 757 return (ENOMEM); 758 } 759 if (newp) { 760 if (securelevel > 2) 761 return EPERM; 762 if (newlen > MAXPATHLEN) 763 return ENAMETOOLONG; 764 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 765 if (tmps == NULL) 766 return ENOMEM; 767 error = copyin(newp, tmps, newlen + 1); 768 tmps[newlen] = '\0'; 769 if (error) 770 goto cleanup; 771 /* Enforce to be either 'core' for end with '.core' */ 772 if (newlen < 4) { /* c.o.r.e */ 773 error = EINVAL; 774 goto cleanup; 775 } 776 len = newlen - 4; 777 if (len > 0) { 778 if (tmps[len - 1] != '.' && 779 tmps[len - 1] != '/') { 780 error = EINVAL; 781 goto cleanup; 782 } 783 } 784 if (strcmp(&tmps[len], "core") != 0) { 785 error = EINVAL; 786 goto cleanup; 787 } 788 } 789 if (oldp && oldlenp) { 790 *oldlenp = curlen; 791 error = copyout(ptmp->p_limit->pl_corename, oldp, 792 curlen); 793 } 794 if (newp && error == 0) { 795 /* if the 2 strings are identical, don't limcopy() */ 796 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 797 error = 0; 798 goto cleanup; 799 } 800 if (ptmp->p_limit->p_refcnt > 1 && 801 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 802 newplim = limcopy(ptmp->p_limit); 803 limfree(ptmp->p_limit); 804 ptmp->p_limit = newplim; 805 } 806 if (ptmp->p_limit->pl_corename != defcorename) { 807 free(ptmp->p_limit->pl_corename, M_TEMP); 808 } 809 ptmp->p_limit->pl_corename = tmps; 810 return (0); 811 } 812 cleanup: 813 if (tmps) 814 free(tmps, M_TEMP); 815 return (error); 816 } 817 if (name[1] == PROC_PID_LIMIT) { 818 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 819 return EINVAL; 820 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 821 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 822 error = sysctl_quad(oldp, oldlenp, newp, newlen, 823 &alim.rlim_max); 824 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 825 error = sysctl_quad(oldp, oldlenp, newp, newlen, 826 &alim.rlim_cur); 827 else 828 error = EINVAL; 829 830 if (error) 831 return error; 832 833 if (newp) 834 error = dosetrlimit(ptmp, p->p_cred, 835 name[2] - 1, &alim); 836 return error; 837 } 838 return (EINVAL); 839 } 840 841 int 842 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 843 void *newp, size_t newlen, struct proc *p) 844 { 845 static struct { 846 const char *name; 847 int type; 848 } emulations[] = CTL_EMUL_NAMES; 849 const struct emul *e; 850 const char *ename; 851 #ifdef LKM 852 extern struct lock exec_lock; /* XXX */ 853 int error; 854 #else 855 extern int nexecs_builtin; 856 extern const struct execsw execsw_builtin[]; 857 int i; 858 #endif 859 860 /* all sysctl names at this level are name and field */ 861 if (namelen < 2) 862 return (ENOTDIR); /* overloaded */ 863 864 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 865 return (EOPNOTSUPP); 866 867 ename = emulations[name[0]].name; 868 869 #ifdef LKM 870 lockmgr(&exec_lock, LK_SHARED, NULL); 871 if ((e = emul_search(ename))) { 872 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 873 newp, newlen, p); 874 } else 875 error = EOPNOTSUPP; 876 lockmgr(&exec_lock, LK_RELEASE, NULL); 877 878 return (error); 879 #else 880 for (i = 0; i < nexecs_builtin; i++) { 881 e = execsw_builtin[i].es_emul; 882 if (e == NULL || strcmp(ename, e->e_name) != 0 || 883 e->e_sysctl != NULL) 884 continue; 885 886 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 887 newp, newlen, p); 888 } 889 890 return (EOPNOTSUPP); 891 #endif 892 } 893 /* 894 * Convenience macros. 895 */ 896 897 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 898 if (oldlenp) { \ 899 if (!oldp) \ 900 *oldlenp = len; \ 901 else { \ 902 if (*oldlenp < len) \ 903 return(ENOMEM); \ 904 *oldlenp = len; \ 905 error = copyout((caddr_t)valp, oldp, len); \ 906 } \ 907 } 908 909 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 910 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 911 912 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 913 if (newp && newlen != len) \ 914 return (EINVAL); 915 916 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 917 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 918 919 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 920 if (error == 0 && newp) \ 921 error = copyin(newp, valp, len); 922 923 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 924 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 925 926 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 927 if (oldlenp) { \ 928 len = strlen(str) + 1; \ 929 if (!oldp) \ 930 *oldlenp = len; \ 931 else { \ 932 if (*oldlenp < len) { \ 933 err2 = ENOMEM; \ 934 len = *oldlenp; \ 935 } else \ 936 *oldlenp = len; \ 937 error = copyout(str, oldp, len);\ 938 if (error == 0) \ 939 error = err2; \ 940 } \ 941 } 942 943 /* 944 * Validate parameters and get old / set new parameters 945 * for an integer-valued sysctl function. 946 */ 947 int 948 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 949 { 950 int error = 0; 951 952 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 953 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 954 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 955 956 return (error); 957 } 958 959 960 /* 961 * As above, but read-only. 962 */ 963 int 964 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 965 { 966 int error = 0; 967 968 if (newp) 969 return (EPERM); 970 971 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 972 973 return (error); 974 } 975 976 /* 977 * Validate parameters and get old / set new parameters 978 * for an quad-valued sysctl function. 979 */ 980 int 981 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 982 quad_t *valp) 983 { 984 int error = 0; 985 986 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 987 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 988 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 989 990 return (error); 991 } 992 993 /* 994 * As above, but read-only. 995 */ 996 int 997 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 998 { 999 int error = 0; 1000 1001 if (newp) 1002 return (EPERM); 1003 1004 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1005 1006 return (error); 1007 } 1008 1009 /* 1010 * Validate parameters and get old / set new parameters 1011 * for a string-valued sysctl function. 1012 */ 1013 int 1014 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1015 int maxlen) 1016 { 1017 int len, error = 0, err2 = 0; 1018 1019 if (newp && newlen >= maxlen) 1020 return (EINVAL); 1021 1022 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1023 1024 if (error == 0 && newp) { 1025 error = copyin(newp, str, newlen); 1026 str[newlen] = 0; 1027 } 1028 return (error); 1029 } 1030 1031 /* 1032 * As above, but read-only. 1033 */ 1034 int 1035 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1036 { 1037 int len, error = 0, err2 = 0; 1038 1039 if (newp) 1040 return (EPERM); 1041 1042 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1043 1044 return (error); 1045 } 1046 1047 /* 1048 * Validate parameters and get old / set new parameters 1049 * for a structure oriented sysctl function. 1050 */ 1051 int 1052 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1053 int len) 1054 { 1055 int error = 0; 1056 1057 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1058 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1059 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1060 1061 return (error); 1062 } 1063 1064 /* 1065 * Validate parameters and get old parameters 1066 * for a structure oriented sysctl function. 1067 */ 1068 int 1069 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1070 int len) 1071 { 1072 int error = 0; 1073 1074 if (newp) 1075 return (EPERM); 1076 1077 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1078 1079 return (error); 1080 } 1081 1082 /* 1083 * As above, but can return a truncated result. 1084 */ 1085 int 1086 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1087 int len) 1088 { 1089 int error = 0; 1090 1091 if (newp) 1092 return (EPERM); 1093 1094 len = min(*oldlenp, len); 1095 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1096 1097 return (error); 1098 } 1099 1100 /* 1101 * Get file structures. 1102 */ 1103 static int 1104 sysctl_file(void *vwhere, size_t *sizep) 1105 { 1106 int buflen, error; 1107 struct file *fp; 1108 char *start, *where; 1109 1110 start = where = vwhere; 1111 buflen = *sizep; 1112 if (where == NULL) { 1113 /* 1114 * overestimate by 10 files 1115 */ 1116 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1117 return (0); 1118 } 1119 1120 /* 1121 * first copyout filehead 1122 */ 1123 if (buflen < sizeof(filehead)) { 1124 *sizep = 0; 1125 return (0); 1126 } 1127 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1128 if (error) 1129 return (error); 1130 buflen -= sizeof(filehead); 1131 where += sizeof(filehead); 1132 1133 /* 1134 * followed by an array of file structures 1135 */ 1136 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1137 if (buflen < sizeof(struct file)) { 1138 *sizep = where - start; 1139 return (ENOMEM); 1140 } 1141 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1142 if (error) 1143 return (error); 1144 buflen -= sizeof(struct file); 1145 where += sizeof(struct file); 1146 } 1147 *sizep = where - start; 1148 return (0); 1149 } 1150 1151 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1152 #define FILL_PERM(src, dst) do { \ 1153 (dst)._key = (src)._key; \ 1154 (dst).uid = (src).uid; \ 1155 (dst).gid = (src).gid; \ 1156 (dst).cuid = (src).cuid; \ 1157 (dst).cgid = (src).cgid; \ 1158 (dst).mode = (src).mode; \ 1159 (dst)._seq = (src)._seq; \ 1160 } while (0); 1161 #define FILL_MSG(src, dst) do { \ 1162 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1163 (dst).msg_qnum = (src).msg_qnum; \ 1164 (dst).msg_qbytes = (src).msg_qbytes; \ 1165 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1166 (dst).msg_lspid = (src).msg_lspid; \ 1167 (dst).msg_lrpid = (src).msg_lrpid; \ 1168 (dst).msg_stime = (src).msg_stime; \ 1169 (dst).msg_rtime = (src).msg_rtime; \ 1170 (dst).msg_ctime = (src).msg_ctime; \ 1171 } while (0) 1172 #define FILL_SEM(src, dst) do { \ 1173 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1174 (dst).sem_nsems = (src).sem_nsems; \ 1175 (dst).sem_otime = (src).sem_otime; \ 1176 (dst).sem_ctime = (src).sem_ctime; \ 1177 } while (0) 1178 #define FILL_SHM(src, dst) do { \ 1179 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1180 (dst).shm_segsz = (src).shm_segsz; \ 1181 (dst).shm_lpid = (src).shm_lpid; \ 1182 (dst).shm_cpid = (src).shm_cpid; \ 1183 (dst).shm_atime = (src).shm_atime; \ 1184 (dst).shm_dtime = (src).shm_dtime; \ 1185 (dst).shm_ctime = (src).shm_ctime; \ 1186 (dst).shm_nattch = (src).shm_nattch; \ 1187 } while (0) 1188 1189 static int 1190 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1191 { 1192 #ifdef SYSVMSG 1193 struct msg_sysctl_info *msgsi; 1194 #endif 1195 #ifdef SYSVSEM 1196 struct sem_sysctl_info *semsi; 1197 #endif 1198 #ifdef SYSVSHM 1199 struct shm_sysctl_info *shmsi; 1200 #endif 1201 size_t infosize, dssize, tsize, buflen; 1202 void *buf = NULL; 1203 char *start; 1204 int32_t nds; 1205 int i, error, ret; 1206 1207 if (namelen != 1) 1208 return (EINVAL); 1209 1210 start = where; 1211 buflen = *sizep; 1212 1213 switch (*name) { 1214 case KERN_SYSVIPC_MSG_INFO: 1215 #ifdef SYSVMSG 1216 infosize = sizeof(msgsi->msginfo); 1217 nds = msginfo.msgmni; 1218 dssize = sizeof(msgsi->msgids[0]); 1219 break; 1220 #else 1221 return (EINVAL); 1222 #endif 1223 case KERN_SYSVIPC_SEM_INFO: 1224 #ifdef SYSVSEM 1225 infosize = sizeof(semsi->seminfo); 1226 nds = seminfo.semmni; 1227 dssize = sizeof(semsi->semids[0]); 1228 break; 1229 #else 1230 return (EINVAL); 1231 #endif 1232 case KERN_SYSVIPC_SHM_INFO: 1233 #ifdef SYSVSHM 1234 infosize = sizeof(shmsi->shminfo); 1235 nds = shminfo.shmmni; 1236 dssize = sizeof(shmsi->shmids[0]); 1237 break; 1238 #else 1239 return (EINVAL); 1240 #endif 1241 default: 1242 return (EINVAL); 1243 } 1244 /* 1245 * Round infosize to 64 bit boundary if requesting more than just 1246 * the info structure or getting the total data size. 1247 */ 1248 if (where == NULL || *sizep > infosize) 1249 infosize = ((infosize + 7) / 8) * 8; 1250 tsize = infosize + nds * dssize; 1251 1252 /* Return just the total size required. */ 1253 if (where == NULL) { 1254 *sizep = tsize; 1255 return (0); 1256 } 1257 1258 /* Not enough room for even the info struct. */ 1259 if (buflen < infosize) { 1260 *sizep = 0; 1261 return (ENOMEM); 1262 } 1263 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1264 memset(buf, 0, min(tsize, buflen)); 1265 1266 switch (*name) { 1267 #ifdef SYSVMSG 1268 case KERN_SYSVIPC_MSG_INFO: 1269 msgsi = (struct msg_sysctl_info *)buf; 1270 msgsi->msginfo = msginfo; 1271 break; 1272 #endif 1273 #ifdef SYSVSEM 1274 case KERN_SYSVIPC_SEM_INFO: 1275 semsi = (struct sem_sysctl_info *)buf; 1276 semsi->seminfo = seminfo; 1277 break; 1278 #endif 1279 #ifdef SYSVSHM 1280 case KERN_SYSVIPC_SHM_INFO: 1281 shmsi = (struct shm_sysctl_info *)buf; 1282 shmsi->shminfo = shminfo; 1283 break; 1284 #endif 1285 } 1286 buflen -= infosize; 1287 1288 ret = 0; 1289 if (buflen > 0) { 1290 /* Fill in the IPC data structures. */ 1291 for (i = 0; i < nds; i++) { 1292 if (buflen < dssize) { 1293 ret = ENOMEM; 1294 break; 1295 } 1296 switch (*name) { 1297 #ifdef SYSVMSG 1298 case KERN_SYSVIPC_MSG_INFO: 1299 FILL_MSG(msqids[i], msgsi->msgids[i]); 1300 break; 1301 #endif 1302 #ifdef SYSVSEM 1303 case KERN_SYSVIPC_SEM_INFO: 1304 FILL_SEM(sema[i], semsi->semids[i]); 1305 break; 1306 #endif 1307 #ifdef SYSVSHM 1308 case KERN_SYSVIPC_SHM_INFO: 1309 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1310 break; 1311 #endif 1312 } 1313 buflen -= dssize; 1314 } 1315 } 1316 *sizep -= buflen; 1317 error = copyout(buf, start, *sizep); 1318 /* If copyout succeeded, use return code set earlier. */ 1319 if (error == 0) 1320 error = ret; 1321 if (buf) 1322 free(buf, M_TEMP); 1323 return (error); 1324 } 1325 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1326 1327 static int 1328 sysctl_msgbuf(void *vwhere, size_t *sizep) 1329 { 1330 char *where = vwhere; 1331 size_t len, maxlen = *sizep; 1332 long beg, end; 1333 int error; 1334 1335 /* 1336 * deal with cases where the message buffer has 1337 * become corrupted. 1338 */ 1339 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1340 msgbufenabled = 0; 1341 return (ENXIO); 1342 } 1343 1344 if (where == NULL) { 1345 /* always return full buffer size */ 1346 *sizep = msgbufp->msg_bufs; 1347 return (0); 1348 } 1349 1350 error = 0; 1351 maxlen = min(msgbufp->msg_bufs, maxlen); 1352 1353 /* 1354 * First, copy from the write pointer to the end of 1355 * message buffer. 1356 */ 1357 beg = msgbufp->msg_bufx; 1358 end = msgbufp->msg_bufs; 1359 while (maxlen > 0) { 1360 len = min(end - beg, maxlen); 1361 if (len == 0) 1362 break; 1363 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1364 if (error) 1365 break; 1366 where += len; 1367 maxlen -= len; 1368 1369 /* 1370 * ... then, copy from the beginning of message buffer to 1371 * the write pointer. 1372 */ 1373 beg = 0; 1374 end = msgbufp->msg_bufx; 1375 } 1376 return (error); 1377 } 1378 1379 /* 1380 * try over estimating by 5 procs 1381 */ 1382 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1383 1384 static int 1385 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1386 { 1387 struct eproc eproc; 1388 struct kinfo_proc2 kproc2; 1389 struct kinfo_proc *dp; 1390 struct proc *p; 1391 const struct proclist_desc *pd; 1392 char *where, *dp2; 1393 int type, op, arg, elem_size, elem_count; 1394 int buflen, needed, error; 1395 1396 dp = vwhere; 1397 dp2 = where = vwhere; 1398 buflen = where != NULL ? *sizep : 0; 1399 error = needed = 0; 1400 type = name[0]; 1401 1402 if (type == KERN_PROC) { 1403 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1404 return (EINVAL); 1405 op = name[1]; 1406 if (op != KERN_PROC_ALL) 1407 arg = name[2]; 1408 } else { 1409 if (namelen != 5) 1410 return (EINVAL); 1411 op = name[1]; 1412 arg = name[2]; 1413 elem_size = name[3]; 1414 elem_count = name[4]; 1415 } 1416 1417 proclist_lock_read(); 1418 1419 pd = proclists; 1420 again: 1421 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1422 /* 1423 * Skip embryonic processes. 1424 */ 1425 if (p->p_stat == SIDL) 1426 continue; 1427 /* 1428 * TODO - make more efficient (see notes below). 1429 * do by session. 1430 */ 1431 switch (op) { 1432 1433 case KERN_PROC_PID: 1434 /* could do this with just a lookup */ 1435 if (p->p_pid != (pid_t)arg) 1436 continue; 1437 break; 1438 1439 case KERN_PROC_PGRP: 1440 /* could do this by traversing pgrp */ 1441 if (p->p_pgrp->pg_id != (pid_t)arg) 1442 continue; 1443 break; 1444 1445 case KERN_PROC_SESSION: 1446 if (p->p_session->s_sid != (pid_t)arg) 1447 continue; 1448 break; 1449 1450 case KERN_PROC_TTY: 1451 if (arg == KERN_PROC_TTY_REVOKE) { 1452 if ((p->p_flag & P_CONTROLT) == 0 || 1453 p->p_session->s_ttyp == NULL || 1454 p->p_session->s_ttyvp != NULL) 1455 continue; 1456 } else if ((p->p_flag & P_CONTROLT) == 0 || 1457 p->p_session->s_ttyp == NULL) { 1458 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1459 continue; 1460 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1461 continue; 1462 break; 1463 1464 case KERN_PROC_UID: 1465 if (p->p_ucred->cr_uid != (uid_t)arg) 1466 continue; 1467 break; 1468 1469 case KERN_PROC_RUID: 1470 if (p->p_cred->p_ruid != (uid_t)arg) 1471 continue; 1472 break; 1473 1474 case KERN_PROC_GID: 1475 if (p->p_ucred->cr_gid != (uid_t)arg) 1476 continue; 1477 break; 1478 1479 case KERN_PROC_RGID: 1480 if (p->p_cred->p_rgid != (uid_t)arg) 1481 continue; 1482 break; 1483 1484 case KERN_PROC_ALL: 1485 /* allow everything */ 1486 break; 1487 1488 default: 1489 error = EINVAL; 1490 goto cleanup; 1491 } 1492 if (type == KERN_PROC) { 1493 if (buflen >= sizeof(struct kinfo_proc)) { 1494 fill_eproc(p, &eproc); 1495 error = copyout((caddr_t)p, &dp->kp_proc, 1496 sizeof(struct proc)); 1497 if (error) 1498 goto cleanup; 1499 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1500 sizeof(eproc)); 1501 if (error) 1502 goto cleanup; 1503 dp++; 1504 buflen -= sizeof(struct kinfo_proc); 1505 } 1506 needed += sizeof(struct kinfo_proc); 1507 } else { /* KERN_PROC2 */ 1508 if (buflen >= elem_size && elem_count > 0) { 1509 fill_kproc2(p, &kproc2); 1510 /* 1511 * Copy out elem_size, but not larger than 1512 * the size of a struct kinfo_proc2. 1513 */ 1514 error = copyout(&kproc2, dp2, 1515 min(sizeof(kproc2), elem_size)); 1516 if (error) 1517 goto cleanup; 1518 dp2 += elem_size; 1519 buflen -= elem_size; 1520 elem_count--; 1521 } 1522 needed += elem_size; 1523 } 1524 } 1525 pd++; 1526 if (pd->pd_list != NULL) 1527 goto again; 1528 proclist_unlock_read(); 1529 1530 if (where != NULL) { 1531 if (type == KERN_PROC) 1532 *sizep = (caddr_t)dp - where; 1533 else 1534 *sizep = dp2 - where; 1535 if (needed > *sizep) 1536 return (ENOMEM); 1537 } else { 1538 needed += KERN_PROCSLOP; 1539 *sizep = needed; 1540 } 1541 return (0); 1542 cleanup: 1543 proclist_unlock_read(); 1544 return (error); 1545 } 1546 1547 /* 1548 * Fill in an eproc structure for the specified process. 1549 */ 1550 void 1551 fill_eproc(struct proc *p, struct eproc *ep) 1552 { 1553 struct tty *tp; 1554 1555 ep->e_paddr = p; 1556 ep->e_sess = p->p_session; 1557 ep->e_pcred = *p->p_cred; 1558 ep->e_ucred = *p->p_ucred; 1559 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1560 ep->e_vm.vm_rssize = 0; 1561 ep->e_vm.vm_tsize = 0; 1562 ep->e_vm.vm_dsize = 0; 1563 ep->e_vm.vm_ssize = 0; 1564 /* ep->e_vm.vm_pmap = XXX; */ 1565 } else { 1566 struct vmspace *vm = p->p_vmspace; 1567 1568 ep->e_vm.vm_rssize = vm_resident_count(vm); 1569 ep->e_vm.vm_tsize = vm->vm_tsize; 1570 ep->e_vm.vm_dsize = vm->vm_dsize; 1571 ep->e_vm.vm_ssize = vm->vm_ssize; 1572 } 1573 if (p->p_pptr) 1574 ep->e_ppid = p->p_pptr->p_pid; 1575 else 1576 ep->e_ppid = 0; 1577 ep->e_pgid = p->p_pgrp->pg_id; 1578 ep->e_sid = ep->e_sess->s_sid; 1579 ep->e_jobc = p->p_pgrp->pg_jobc; 1580 if ((p->p_flag & P_CONTROLT) && 1581 (tp = ep->e_sess->s_ttyp)) { 1582 ep->e_tdev = tp->t_dev; 1583 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1584 ep->e_tsess = tp->t_session; 1585 } else 1586 ep->e_tdev = NODEV; 1587 if (p->p_wmesg) 1588 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1589 ep->e_xsize = ep->e_xrssize = 0; 1590 ep->e_xccount = ep->e_xswrss = 0; 1591 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1592 if (SESS_LEADER(p)) 1593 ep->e_flag |= EPROC_SLEADER; 1594 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1595 } 1596 1597 /* 1598 * Fill in an eproc structure for the specified process. 1599 */ 1600 static void 1601 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1602 { 1603 struct tty *tp; 1604 1605 memset(ki, 0, sizeof(*ki)); 1606 1607 ki->p_forw = PTRTOINT64(p->p_forw); 1608 ki->p_back = PTRTOINT64(p->p_back); 1609 ki->p_paddr = PTRTOINT64(p); 1610 1611 ki->p_addr = PTRTOINT64(p->p_addr); 1612 ki->p_fd = PTRTOINT64(p->p_fd); 1613 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1614 ki->p_stats = PTRTOINT64(p->p_stats); 1615 ki->p_limit = PTRTOINT64(p->p_limit); 1616 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1617 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1618 ki->p_sess = PTRTOINT64(p->p_session); 1619 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1620 ki->p_ru = PTRTOINT64(p->p_ru); 1621 1622 ki->p_eflag = 0; 1623 ki->p_exitsig = p->p_exitsig; 1624 ki->p_flag = p->p_flag; 1625 1626 ki->p_pid = p->p_pid; 1627 if (p->p_pptr) 1628 ki->p_ppid = p->p_pptr->p_pid; 1629 else 1630 ki->p_ppid = 0; 1631 ki->p_sid = p->p_session->s_sid; 1632 ki->p__pgid = p->p_pgrp->pg_id; 1633 1634 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1635 1636 ki->p_uid = p->p_ucred->cr_uid; 1637 ki->p_ruid = p->p_cred->p_ruid; 1638 ki->p_gid = p->p_ucred->cr_gid; 1639 ki->p_rgid = p->p_cred->p_rgid; 1640 1641 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1642 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1643 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1644 1645 ki->p_jobc = p->p_pgrp->pg_jobc; 1646 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1647 ki->p_tdev = tp->t_dev; 1648 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1649 ki->p_tsess = PTRTOINT64(tp->t_session); 1650 } else { 1651 ki->p_tdev = NODEV; 1652 } 1653 1654 ki->p_estcpu = p->p_estcpu; 1655 ki->p_rtime_sec = p->p_rtime.tv_sec; 1656 ki->p_rtime_usec = p->p_rtime.tv_usec; 1657 ki->p_cpticks = p->p_cpticks; 1658 ki->p_pctcpu = p->p_pctcpu; 1659 ki->p_swtime = p->p_swtime; 1660 ki->p_slptime = p->p_slptime; 1661 if (p->p_stat == SONPROC) { 1662 KDASSERT(p->p_cpu != NULL); 1663 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1664 } else 1665 ki->p_schedflags = 0; 1666 1667 ki->p_uticks = p->p_uticks; 1668 ki->p_sticks = p->p_sticks; 1669 ki->p_iticks = p->p_iticks; 1670 1671 ki->p_tracep = PTRTOINT64(p->p_tracep); 1672 ki->p_traceflag = p->p_traceflag; 1673 1674 ki->p_holdcnt = p->p_holdcnt; 1675 1676 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1677 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1678 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1679 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1680 1681 ki->p_stat = p->p_stat; 1682 ki->p_priority = p->p_priority; 1683 ki->p_usrpri = p->p_usrpri; 1684 ki->p_nice = p->p_nice; 1685 1686 ki->p_xstat = p->p_xstat; 1687 ki->p_acflag = p->p_acflag; 1688 1689 strncpy(ki->p_comm, p->p_comm, 1690 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1691 1692 if (p->p_wmesg) 1693 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1694 ki->p_wchan = PTRTOINT64(p->p_wchan); 1695 1696 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1697 1698 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1699 ki->p_vm_rssize = 0; 1700 ki->p_vm_tsize = 0; 1701 ki->p_vm_dsize = 0; 1702 ki->p_vm_ssize = 0; 1703 } else { 1704 struct vmspace *vm = p->p_vmspace; 1705 1706 ki->p_vm_rssize = vm_resident_count(vm); 1707 ki->p_vm_tsize = vm->vm_tsize; 1708 ki->p_vm_dsize = vm->vm_dsize; 1709 ki->p_vm_ssize = vm->vm_ssize; 1710 } 1711 1712 if (p->p_session->s_ttyvp) 1713 ki->p_eflag |= EPROC_CTTY; 1714 if (SESS_LEADER(p)) 1715 ki->p_eflag |= EPROC_SLEADER; 1716 1717 /* XXX Is this double check necessary? */ 1718 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1719 ki->p_uvalid = 0; 1720 } else { 1721 ki->p_uvalid = 1; 1722 1723 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1724 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1725 1726 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1727 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1728 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1729 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1730 1731 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1732 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1733 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1734 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1735 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1736 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1737 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1738 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1739 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1740 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1741 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1742 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1743 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1744 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1745 1746 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1747 p->p_stats->p_cru.ru_stime.tv_sec; 1748 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1749 p->p_stats->p_cru.ru_stime.tv_usec; 1750 } 1751 #ifdef MULTIPROCESSOR 1752 if (p->p_cpu != NULL) 1753 ki->p_cpuid = p->p_cpu->ci_cpuid; 1754 else 1755 #endif 1756 ki->p_cpuid = KI_NOCPU; 1757 } 1758 1759 int 1760 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1761 struct proc *up) 1762 { 1763 struct ps_strings pss; 1764 struct proc *p; 1765 size_t len, upper_bound, xlen; 1766 struct uio auio; 1767 struct iovec aiov; 1768 vaddr_t argv; 1769 pid_t pid; 1770 int nargv, type, error, i; 1771 char *arg; 1772 char *tmp; 1773 1774 if (namelen != 2) 1775 return (EINVAL); 1776 pid = name[0]; 1777 type = name[1]; 1778 1779 switch (type) { 1780 case KERN_PROC_ARGV: 1781 case KERN_PROC_NARGV: 1782 case KERN_PROC_ENV: 1783 case KERN_PROC_NENV: 1784 /* ok */ 1785 break; 1786 default: 1787 return (EINVAL); 1788 } 1789 1790 /* check pid */ 1791 if ((p = pfind(pid)) == NULL) 1792 return (EINVAL); 1793 1794 /* only root or same user change look at the environment */ 1795 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1796 if (up->p_ucred->cr_uid != 0) { 1797 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1798 up->p_cred->p_ruid != p->p_cred->p_svuid) 1799 return (EPERM); 1800 } 1801 } 1802 1803 if (sizep != NULL && where == NULL) { 1804 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1805 *sizep = sizeof (int); 1806 else 1807 *sizep = ARG_MAX; /* XXX XXX XXX */ 1808 return (0); 1809 } 1810 if (where == NULL || sizep == NULL) 1811 return (EINVAL); 1812 1813 /* 1814 * Zombies don't have a stack, so we can't read their psstrings. 1815 * System processes also don't have a user stack. 1816 */ 1817 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1818 return (EINVAL); 1819 1820 /* 1821 * Lock the process down in memory. 1822 */ 1823 /* XXXCDC: how should locking work here? */ 1824 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1825 return (EFAULT); 1826 p->p_vmspace->vm_refcnt++; /* XXX */ 1827 1828 /* 1829 * Allocate a temporary buffer to hold the arguments. 1830 */ 1831 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1832 1833 /* 1834 * Read in the ps_strings structure. 1835 */ 1836 aiov.iov_base = &pss; 1837 aiov.iov_len = sizeof(pss); 1838 auio.uio_iov = &aiov; 1839 auio.uio_iovcnt = 1; 1840 auio.uio_offset = (vaddr_t)p->p_psstr; 1841 auio.uio_resid = sizeof(pss); 1842 auio.uio_segflg = UIO_SYSSPACE; 1843 auio.uio_rw = UIO_READ; 1844 auio.uio_procp = NULL; 1845 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1846 if (error) 1847 goto done; 1848 1849 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1850 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1851 else 1852 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1853 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1854 error = copyout(&nargv, where, sizeof(nargv)); 1855 *sizep = sizeof(nargv); 1856 goto done; 1857 } 1858 /* 1859 * Now read the address of the argument vector. 1860 */ 1861 switch (type) { 1862 case KERN_PROC_ARGV: 1863 /* XXX compat32 stuff here */ 1864 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1865 break; 1866 case KERN_PROC_ENV: 1867 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1868 break; 1869 default: 1870 return (EINVAL); 1871 } 1872 auio.uio_offset = (off_t)(long)tmp; 1873 aiov.iov_base = &argv; 1874 aiov.iov_len = sizeof(argv); 1875 auio.uio_iov = &aiov; 1876 auio.uio_iovcnt = 1; 1877 auio.uio_resid = sizeof(argv); 1878 auio.uio_segflg = UIO_SYSSPACE; 1879 auio.uio_rw = UIO_READ; 1880 auio.uio_procp = NULL; 1881 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1882 if (error) 1883 goto done; 1884 1885 /* 1886 * Now copy in the actual argument vector, one page at a time, 1887 * since we don't know how long the vector is (though, we do 1888 * know how many NUL-terminated strings are in the vector). 1889 */ 1890 len = 0; 1891 upper_bound = *sizep; 1892 for (; nargv != 0 && len < upper_bound; len += xlen) { 1893 aiov.iov_base = arg; 1894 aiov.iov_len = PAGE_SIZE; 1895 auio.uio_iov = &aiov; 1896 auio.uio_iovcnt = 1; 1897 auio.uio_offset = argv + len; 1898 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1899 auio.uio_resid = xlen; 1900 auio.uio_segflg = UIO_SYSSPACE; 1901 auio.uio_rw = UIO_READ; 1902 auio.uio_procp = NULL; 1903 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1904 if (error) 1905 goto done; 1906 1907 for (i = 0; i < xlen && nargv != 0; i++) { 1908 if (arg[i] == '\0') 1909 nargv--; /* one full string */ 1910 } 1911 1912 /* make sure we don't copyout past the end of the user's buffer */ 1913 if (len + i > upper_bound) 1914 i = upper_bound - len; 1915 1916 error = copyout(arg, (char *)where + len, i); 1917 if (error) 1918 break; 1919 1920 if (nargv == 0) { 1921 len += i; 1922 break; 1923 } 1924 } 1925 *sizep = len; 1926 1927 done: 1928 uvmspace_free(p->p_vmspace); 1929 1930 free(arg, M_TEMP); 1931 return (error); 1932 } 1933 1934 #if NPTY > 0 1935 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1936 1937 /* 1938 * Validate parameters and get old / set new parameters 1939 * for pty sysctl function. 1940 */ 1941 static int 1942 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 1943 { 1944 int error = 0; 1945 int oldmax = 0, newmax = 0; 1946 1947 /* get current value of maxptys */ 1948 oldmax = pty_maxptys(0, 0); 1949 1950 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1951 1952 if (!error && newp) { 1953 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1954 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1955 1956 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1957 return (EINVAL); 1958 1959 } 1960 1961 return (error); 1962 } 1963 #endif /* NPTY > 0 */ 1964 1965 static int 1966 sysctl_dotkstat(name, namelen, where, sizep, newp) 1967 int *name; 1968 u_int namelen; 1969 void *where; 1970 size_t *sizep; 1971 void *newp; 1972 { 1973 /* all sysctl names at this level are terminal */ 1974 if (namelen != 1) 1975 return (ENOTDIR); /* overloaded */ 1976 1977 switch (name[0]) { 1978 case KERN_TKSTAT_NIN: 1979 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 1980 case KERN_TKSTAT_NOUT: 1981 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 1982 case KERN_TKSTAT_CANCC: 1983 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 1984 case KERN_TKSTAT_RAWCC: 1985 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 1986 default: 1987 return (EOPNOTSUPP); 1988 } 1989 } 1990
Indexes created Mon Sep 22 13:09:51 GMT 2025