kern_sysctl.c revision 1.86.2.14
1 /* $NetBSD: kern_sysctl.c,v 1.86.2.14 2002/04/17 00:06:18 nathanw 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 1.86.2.14 2002/04/17 00:06:18 nathanw 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 55 #include <sys/param.h> 56 #include <sys/systm.h> 57 #include <sys/kernel.h> 58 #include <sys/buf.h> 59 #include <sys/device.h> 60 #include <sys/disklabel.h> 61 #include <sys/dkstat.h> 62 #include <sys/exec.h> 63 #include <sys/file.h> 64 #include <sys/ioctl.h> 65 #include <sys/malloc.h> 66 #include <sys/mount.h> 67 #include <sys/msgbuf.h> 68 #include <sys/pool.h> 69 #include <sys/lwp.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 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 107 108 static int sysctl_file(void *, size_t *); 109 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 110 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 111 #endif 112 static int sysctl_msgbuf(void *, size_t *); 113 static int sysctl_doeproc(int *, u_int, void *, size_t *); 114 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 115 #ifdef MULTIPROCESSOR 116 static int sysctl_docptime(void *, size_t *, void *); 117 static int sysctl_ncpus(void); 118 #endif 119 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 120 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 121 #if NPTY > 0 122 static int sysctl_pty(void *, size_t *, void *, size_t); 123 #endif 124 125 /* 126 * The `sysctl_memlock' is intended to keep too many processes from 127 * locking down memory by doing sysctls at once. Whether or not this 128 * is really a good idea to worry about it probably a subject of some 129 * debate. 130 */ 131 struct lock sysctl_memlock; 132 133 void 134 sysctl_init(void) 135 { 136 137 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 138 } 139 140 int 141 sys___sysctl(struct lwp *l, void *v, register_t *retval) 142 { 143 struct sys___sysctl_args /* { 144 syscallarg(int *) name; 145 syscallarg(u_int) namelen; 146 syscallarg(void *) old; 147 syscallarg(size_t *) oldlenp; 148 syscallarg(void *) new; 149 syscallarg(size_t) newlen; 150 } */ *uap = v; 151 struct proc *p = l->l_proc; 152 int error; 153 size_t savelen = 0, oldlen = 0; 154 sysctlfn *fn; 155 int name[CTL_MAXNAME]; 156 size_t *oldlenp; 157 158 /* 159 * all top-level sysctl names are non-terminal 160 */ 161 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 162 return (EINVAL); 163 error = copyin(SCARG(uap, name), &name, 164 SCARG(uap, namelen) * sizeof(int)); 165 if (error) 166 return (error); 167 168 /* 169 * For all but CTL_PROC, must be root to change a value. 170 * For CTL_PROC, must be root, or owner of the proc (and not suid), 171 * this is checked in proc_sysctl() (once we know the targer proc). 172 */ 173 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 174 (error = suser(p->p_ucred, &p->p_acflag))) 175 return error; 176 177 switch (name[0]) { 178 case CTL_KERN: 179 fn = kern_sysctl; 180 break; 181 case CTL_HW: 182 fn = hw_sysctl; 183 break; 184 case CTL_VM: 185 fn = uvm_sysctl; 186 break; 187 case CTL_NET: 188 fn = net_sysctl; 189 break; 190 case CTL_VFS: 191 fn = vfs_sysctl; 192 break; 193 case CTL_MACHDEP: 194 fn = cpu_sysctl; 195 break; 196 #ifdef DEBUG 197 case CTL_DEBUG: 198 fn = debug_sysctl; 199 break; 200 #endif 201 #ifdef DDB 202 case CTL_DDB: 203 fn = ddb_sysctl; 204 break; 205 #endif 206 case CTL_PROC: 207 fn = proc_sysctl; 208 break; 209 210 case CTL_EMUL: 211 fn = emul_sysctl; 212 break; 213 default: 214 return (EOPNOTSUPP); 215 } 216 217 /* 218 * XXX Hey, we wire `old', but what about `new'? 219 */ 220 221 oldlenp = SCARG(uap, oldlenp); 222 if (oldlenp) { 223 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 224 return (error); 225 oldlenp = &oldlen; 226 } 227 if (SCARG(uap, old) != NULL) { 228 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 229 if (error) 230 return (error); 231 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 232 if (error) { 233 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 234 return error; 235 } 236 savelen = oldlen; 237 } 238 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 239 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 240 if (SCARG(uap, old) != NULL) { 241 uvm_vsunlock(p, SCARG(uap, old), savelen); 242 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 243 } 244 if (error) 245 return (error); 246 if (SCARG(uap, oldlenp)) 247 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 248 return (error); 249 } 250 251 /* 252 * Attributes stored in the kernel. 253 */ 254 char hostname[MAXHOSTNAMELEN]; 255 int hostnamelen; 256 257 char domainname[MAXHOSTNAMELEN]; 258 int domainnamelen; 259 260 long hostid; 261 262 #ifdef INSECURE 263 int securelevel = -1; 264 #else 265 int securelevel = 0; 266 #endif 267 268 #ifndef DEFCORENAME 269 #define DEFCORENAME "%n.core" 270 #endif 271 char defcorename[MAXPATHLEN] = DEFCORENAME; 272 int defcorenamelen = sizeof(DEFCORENAME); 273 274 extern int kern_logsigexit; 275 extern fixpt_t ccpu; 276 277 #ifndef MULTIPROCESSOR 278 #define sysctl_ncpus() 1 279 #endif 280 281 #ifdef MULTIPROCESSOR 282 283 #ifndef CPU_INFO_FOREACH 284 #define CPU_INFO_ITERATOR int 285 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 286 #endif 287 288 static int 289 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 290 { 291 u_int64_t cp_time[CPUSTATES]; 292 int i; 293 struct cpu_info *ci; 294 CPU_INFO_ITERATOR cii; 295 296 for (i=0; i<CPUSTATES; i++) 297 cp_time[i] = 0; 298 299 for (CPU_INFO_FOREACH(cii, ci)) { 300 for (i=0; i<CPUSTATES; i++) 301 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 302 } 303 return (sysctl_rdstruct(oldp, oldlenp, newp, 304 cp_time, sizeof(cp_time))); 305 } 306 307 static int 308 sysctl_ncpus(void) 309 { 310 struct cpu_info *ci; 311 CPU_INFO_ITERATOR cii; 312 313 int ncpus = 0; 314 for (CPU_INFO_FOREACH(cii, ci)) 315 ncpus++; 316 return ncpus; 317 } 318 319 #endif 320 321 /* 322 * kernel related system variables. 323 */ 324 int 325 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 326 void *newp, size_t newlen, struct proc *p) 327 { 328 int error, level, inthostid; 329 int old_autonicetime; 330 int old_vnodes; 331 dev_t consdev; 332 333 /* All sysctl names at this level, except for a few, are terminal. */ 334 switch (name[0]) { 335 case KERN_PROC: 336 case KERN_PROC2: 337 case KERN_PROF: 338 case KERN_MBUF: 339 case KERN_PROC_ARGS: 340 case KERN_SYSVIPC_INFO: 341 case KERN_PIPE: 342 case KERN_TKSTAT: 343 /* Not terminal. */ 344 break; 345 default: 346 if (namelen != 1) 347 return (ENOTDIR); /* overloaded */ 348 } 349 350 switch (name[0]) { 351 case KERN_OSTYPE: 352 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 353 case KERN_OSRELEASE: 354 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 355 case KERN_OSREV: 356 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 357 case KERN_VERSION: 358 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 359 case KERN_MAXVNODES: 360 old_vnodes = desiredvnodes; 361 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 362 if (newp && !error) { 363 if (old_vnodes > desiredvnodes) { 364 desiredvnodes = old_vnodes; 365 return (EINVAL); 366 } 367 vfs_reinit(); 368 nchreinit(); 369 } 370 return (error); 371 case KERN_MAXPROC: 372 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 373 case KERN_MAXFILES: 374 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 375 case KERN_ARGMAX: 376 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 377 case KERN_SECURELVL: 378 level = securelevel; 379 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 380 newp == NULL) 381 return (error); 382 if (level < securelevel && p->p_pid != 1) 383 return (EPERM); 384 securelevel = level; 385 return (0); 386 case KERN_HOSTNAME: 387 error = sysctl_string(oldp, oldlenp, newp, newlen, 388 hostname, sizeof(hostname)); 389 if (newp && !error) 390 hostnamelen = newlen; 391 return (error); 392 case KERN_DOMAINNAME: 393 error = sysctl_string(oldp, oldlenp, newp, newlen, 394 domainname, sizeof(domainname)); 395 if (newp && !error) 396 domainnamelen = newlen; 397 return (error); 398 case KERN_HOSTID: 399 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 400 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 401 if (newp && !error) 402 hostid = inthostid; 403 return (error); 404 case KERN_CLOCKRATE: 405 return (sysctl_clockrate(oldp, oldlenp)); 406 case KERN_BOOTTIME: 407 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 408 sizeof(struct timeval))); 409 case KERN_VNODE: 410 return (sysctl_vnode(oldp, oldlenp, p)); 411 case KERN_PROC: 412 case KERN_PROC2: 413 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 414 case KERN_PROC_ARGS: 415 return (sysctl_procargs(name + 1, namelen - 1, 416 oldp, oldlenp, p)); 417 case KERN_FILE: 418 return (sysctl_file(oldp, oldlenp)); 419 #ifdef GPROF 420 case KERN_PROF: 421 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 422 newp, newlen)); 423 #endif 424 case KERN_POSIX1: 425 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 426 case KERN_NGROUPS: 427 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 428 case KERN_JOB_CONTROL: 429 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 430 case KERN_SAVED_IDS: 431 #ifdef _POSIX_SAVED_IDS 432 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 433 #else 434 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 435 #endif 436 case KERN_MAXPARTITIONS: 437 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 438 case KERN_RAWPARTITION: 439 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 440 #ifdef NTP 441 case KERN_NTPTIME: 442 return (sysctl_ntptime(oldp, oldlenp)); 443 #endif 444 case KERN_AUTONICETIME: 445 old_autonicetime = autonicetime; 446 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 447 if (autonicetime < 0) 448 autonicetime = old_autonicetime; 449 return (error); 450 case KERN_AUTONICEVAL: 451 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 452 if (autoniceval < PRIO_MIN) 453 autoniceval = PRIO_MIN; 454 if (autoniceval > PRIO_MAX) 455 autoniceval = PRIO_MAX; 456 return (error); 457 case KERN_RTC_OFFSET: 458 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 459 case KERN_ROOT_DEVICE: 460 return (sysctl_rdstring(oldp, oldlenp, newp, 461 root_device->dv_xname)); 462 case KERN_MSGBUFSIZE: 463 /* 464 * deal with cases where the message buffer has 465 * become corrupted. 466 */ 467 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 468 msgbufenabled = 0; 469 return (ENXIO); 470 } 471 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 472 case KERN_FSYNC: 473 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 474 case KERN_SYSVMSG: 475 #ifdef SYSVMSG 476 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 477 #else 478 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 479 #endif 480 case KERN_SYSVSEM: 481 #ifdef SYSVSEM 482 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 483 #else 484 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 485 #endif 486 case KERN_SYSVSHM: 487 #ifdef SYSVSHM 488 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 489 #else 490 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 491 #endif 492 case KERN_DEFCORENAME: 493 if (newp && newlen < 1) 494 return (EINVAL); 495 error = sysctl_string(oldp, oldlenp, newp, newlen, 496 defcorename, sizeof(defcorename)); 497 if (newp && !error) 498 defcorenamelen = newlen; 499 return (error); 500 case KERN_SYNCHRONIZED_IO: 501 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 502 case KERN_IOV_MAX: 503 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 504 case KERN_MBUF: 505 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 506 newp, newlen)); 507 case KERN_MAPPED_FILES: 508 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 509 case KERN_MEMLOCK: 510 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 511 case KERN_MEMLOCK_RANGE: 512 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 513 case KERN_MEMORY_PROTECTION: 514 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 515 case KERN_LOGIN_NAME_MAX: 516 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 517 case KERN_LOGSIGEXIT: 518 return (sysctl_int(oldp, oldlenp, newp, newlen, 519 &kern_logsigexit)); 520 case KERN_FSCALE: 521 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 522 case KERN_CCPU: 523 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 524 case KERN_CP_TIME: 525 #ifndef MULTIPROCESSOR 526 return (sysctl_rdstruct(oldp, oldlenp, newp, 527 curcpu()->ci_schedstate.spc_cp_time, 528 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 529 #else 530 return (sysctl_docptime(oldp, oldlenp, newp)); 531 #endif 532 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 533 case KERN_SYSVIPC_INFO: 534 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 535 #endif 536 case KERN_MSGBUF: 537 return (sysctl_msgbuf(oldp, oldlenp)); 538 case KERN_CONSDEV: 539 if (cn_tab != NULL) 540 consdev = cn_tab->cn_dev; 541 else 542 consdev = NODEV; 543 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 544 sizeof consdev)); 545 #if NPTY > 0 546 case KERN_MAXPTYS: 547 return sysctl_pty(oldp, oldlenp, newp, newlen); 548 #endif 549 #ifndef PIPE_SOCKETPAIR 550 case KERN_PIPE: 551 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 552 newp, newlen)); 553 #endif 554 case KERN_MAXPHYS: 555 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 556 case KERN_SBMAX: 557 { 558 int new_sbmax = sb_max; 559 560 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 561 if (newp && !error) { 562 if (new_sbmax < (16 * 1024)) /* sanity */ 563 return (EINVAL); 564 sb_max = new_sbmax; 565 } 566 return (error); 567 } 568 case KERN_TKSTAT: 569 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 570 newp)); 571 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 572 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 573 default: 574 return (EOPNOTSUPP); 575 } 576 /* NOTREACHED */ 577 } 578 579 /* 580 * hardware related system variables. 581 */ 582 int 583 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 584 void *newp, size_t newlen, struct proc *p) 585 { 586 587 /* All sysctl names at this level, except for a few, are terminal. */ 588 switch (name[0]) { 589 case HW_DISKSTATS: 590 /* Not terminal. */ 591 break; 592 default: 593 if (namelen != 1) 594 return (ENOTDIR); /* overloaded */ 595 } 596 597 switch (name[0]) { 598 case HW_MACHINE: 599 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 600 case HW_MACHINE_ARCH: 601 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 602 case HW_MODEL: 603 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 604 case HW_NCPU: 605 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 606 case HW_BYTEORDER: 607 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 608 case HW_PHYSMEM: 609 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 610 case HW_USERMEM: 611 return (sysctl_rdint(oldp, oldlenp, newp, 612 ctob(physmem - uvmexp.wired))); 613 case HW_PAGESIZE: 614 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 615 case HW_ALIGNBYTES: 616 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 617 case HW_DISKNAMES: 618 return (sysctl_disknames(oldp, oldlenp)); 619 case HW_DISKSTATS: 620 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 621 case HW_CNMAGIC: { 622 char magic[CNS_LEN]; 623 int error; 624 625 if (oldp) 626 cn_get_magic(magic, CNS_LEN); 627 error = sysctl_string(oldp, oldlenp, newp, newlen, 628 magic, sizeof(magic)); 629 if (newp && !error) { 630 error = cn_set_magic(magic); 631 } 632 return (error); 633 } 634 default: 635 return (EOPNOTSUPP); 636 } 637 /* NOTREACHED */ 638 } 639 640 #ifdef DEBUG 641 /* 642 * Debugging related system variables. 643 */ 644 struct ctldebug debug0, debug1, debug2, debug3, debug4; 645 struct ctldebug debug5, debug6, debug7, debug8, debug9; 646 struct ctldebug debug10, debug11, debug12, debug13, debug14; 647 struct ctldebug debug15, debug16, debug17, debug18, debug19; 648 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 649 &debug0, &debug1, &debug2, &debug3, &debug4, 650 &debug5, &debug6, &debug7, &debug8, &debug9, 651 &debug10, &debug11, &debug12, &debug13, &debug14, 652 &debug15, &debug16, &debug17, &debug18, &debug19, 653 }; 654 655 int 656 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 657 void *newp, size_t newlen, struct proc *p) 658 { 659 struct ctldebug *cdp; 660 661 /* all sysctl names at this level are name and field */ 662 if (namelen != 2) 663 return (ENOTDIR); /* overloaded */ 664 if (name[0] >= CTL_DEBUG_MAXID) 665 return (EOPNOTSUPP); 666 cdp = debugvars[name[0]]; 667 if (cdp->debugname == 0) 668 return (EOPNOTSUPP); 669 switch (name[1]) { 670 case CTL_DEBUG_NAME: 671 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 672 case CTL_DEBUG_VALUE: 673 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 674 default: 675 return (EOPNOTSUPP); 676 } 677 /* NOTREACHED */ 678 } 679 #endif /* DEBUG */ 680 681 int 682 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 683 void *newp, size_t newlen, struct proc *p) 684 { 685 struct proc *ptmp = NULL; 686 const struct proclist_desc *pd; 687 int error = 0; 688 struct rlimit alim; 689 struct plimit *newplim; 690 char *tmps = NULL; 691 int i, curlen, len; 692 693 if (namelen < 2) 694 return EINVAL; 695 696 if (name[0] == PROC_CURPROC) { 697 ptmp = p; 698 } else { 699 proclist_lock_read(); 700 for (pd = proclists; pd->pd_list != NULL; pd++) { 701 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 702 ptmp = LIST_NEXT(ptmp, p_list)) { 703 /* Skip embryonic processes. */ 704 if (ptmp->p_stat == SIDL) 705 continue; 706 if (ptmp->p_pid == (pid_t)name[0]) 707 break; 708 } 709 if (ptmp != NULL) 710 break; 711 } 712 proclist_unlock_read(); 713 if (ptmp == NULL) 714 return(ESRCH); 715 if (p->p_ucred->cr_uid != 0) { 716 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 717 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 718 return EPERM; 719 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 720 return EPERM; /* sgid proc */ 721 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 722 if (p->p_ucred->cr_groups[i] == 723 ptmp->p_cred->p_rgid) 724 break; 725 } 726 if (i == p->p_ucred->cr_ngroups) 727 return EPERM; 728 } 729 } 730 if (name[1] == PROC_PID_CORENAME) { 731 if (namelen != 2) 732 return EINVAL; 733 /* 734 * Can't use sysctl_string() here because we may malloc a new 735 * area during the process, so we have to do it by hand. 736 */ 737 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 738 if (oldlenp && *oldlenp < curlen) { 739 if (!oldp) 740 *oldlenp = curlen; 741 return (ENOMEM); 742 } 743 if (newp) { 744 if (securelevel > 2) 745 return EPERM; 746 if (newlen > MAXPATHLEN) 747 return ENAMETOOLONG; 748 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 749 if (tmps == NULL) 750 return ENOMEM; 751 error = copyin(newp, tmps, newlen + 1); 752 tmps[newlen] = '\0'; 753 if (error) 754 goto cleanup; 755 /* Enforce to be either 'core' for end with '.core' */ 756 if (newlen < 4) { /* c.o.r.e */ 757 error = EINVAL; 758 goto cleanup; 759 } 760 len = newlen - 4; 761 if (len > 0) { 762 if (tmps[len - 1] != '.' && 763 tmps[len - 1] != '/') { 764 error = EINVAL; 765 goto cleanup; 766 } 767 } 768 if (strcmp(&tmps[len], "core") != 0) { 769 error = EINVAL; 770 goto cleanup; 771 } 772 } 773 if (oldp && oldlenp) { 774 *oldlenp = curlen; 775 error = copyout(ptmp->p_limit->pl_corename, oldp, 776 curlen); 777 } 778 if (newp && error == 0) { 779 /* if the 2 strings are identical, don't limcopy() */ 780 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 781 error = 0; 782 goto cleanup; 783 } 784 if (ptmp->p_limit->p_refcnt > 1 && 785 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 786 newplim = limcopy(ptmp->p_limit); 787 limfree(ptmp->p_limit); 788 ptmp->p_limit = newplim; 789 } 790 if (ptmp->p_limit->pl_corename != defcorename) { 791 free(ptmp->p_limit->pl_corename, M_TEMP); 792 } 793 ptmp->p_limit->pl_corename = tmps; 794 return (0); 795 } 796 cleanup: 797 if (tmps) 798 free(tmps, M_TEMP); 799 return (error); 800 } 801 if (name[1] == PROC_PID_LIMIT) { 802 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 803 return EINVAL; 804 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 805 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 806 error = sysctl_quad(oldp, oldlenp, newp, newlen, 807 &alim.rlim_max); 808 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 809 error = sysctl_quad(oldp, oldlenp, newp, newlen, 810 &alim.rlim_cur); 811 else 812 error = EINVAL; 813 814 if (error) 815 return error; 816 817 if (newp) 818 error = dosetrlimit(ptmp, p->p_cred, 819 name[2] - 1, &alim); 820 return error; 821 } 822 return (EINVAL); 823 } 824 825 int 826 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 827 void *newp, size_t newlen, struct proc *p) 828 { 829 static struct { 830 const char *name; 831 int type; 832 } emulations[] = CTL_EMUL_NAMES; 833 const struct emul *e; 834 const char *ename; 835 #ifdef LKM 836 extern struct lock exec_lock; /* XXX */ 837 int error; 838 #else 839 extern int nexecs_builtin; 840 extern const struct execsw execsw_builtin[]; 841 int i; 842 #endif 843 844 /* all sysctl names at this level are name and field */ 845 if (namelen < 2) 846 return (ENOTDIR); /* overloaded */ 847 848 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 849 return (EOPNOTSUPP); 850 851 ename = emulations[name[0]].name; 852 853 #ifdef LKM 854 lockmgr(&exec_lock, LK_SHARED, NULL); 855 if ((e = emul_search(ename))) { 856 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 857 newp, newlen, p); 858 } else 859 error = EOPNOTSUPP; 860 lockmgr(&exec_lock, LK_RELEASE, NULL); 861 862 return (error); 863 #else 864 for (i = 0; i < nexecs_builtin; i++) { 865 e = execsw_builtin[i].es_emul; 866 if (e == NULL || strcmp(ename, e->e_name) != 0 || 867 e->e_sysctl != NULL) 868 continue; 869 870 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 871 newp, newlen, p); 872 } 873 874 return (EOPNOTSUPP); 875 #endif 876 } 877 /* 878 * Convenience macros. 879 */ 880 881 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 882 if (oldlenp) { \ 883 if (!oldp) \ 884 *oldlenp = len; \ 885 else { \ 886 if (*oldlenp < len) \ 887 return(ENOMEM); \ 888 *oldlenp = len; \ 889 error = copyout((caddr_t)valp, oldp, len); \ 890 } \ 891 } 892 893 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 894 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 895 896 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 897 if (newp && newlen != len) \ 898 return (EINVAL); 899 900 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 901 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 902 903 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 904 if (error == 0 && newp) \ 905 error = copyin(newp, valp, len); 906 907 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 908 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 909 910 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 911 if (oldlenp) { \ 912 len = strlen(str) + 1; \ 913 if (!oldp) \ 914 *oldlenp = len; \ 915 else { \ 916 if (*oldlenp < len) { \ 917 err2 = ENOMEM; \ 918 len = *oldlenp; \ 919 } else \ 920 *oldlenp = len; \ 921 error = copyout(str, oldp, len);\ 922 if (error == 0) \ 923 error = err2; \ 924 } \ 925 } 926 927 /* 928 * Validate parameters and get old / set new parameters 929 * for an integer-valued sysctl function. 930 */ 931 int 932 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 933 { 934 int error = 0; 935 936 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 937 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 938 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 939 940 return (error); 941 } 942 943 944 /* 945 * As above, but read-only. 946 */ 947 int 948 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 949 { 950 int error = 0; 951 952 if (newp) 953 return (EPERM); 954 955 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 956 957 return (error); 958 } 959 960 /* 961 * Validate parameters and get old / set new parameters 962 * for an quad-valued sysctl function. 963 */ 964 int 965 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 966 quad_t *valp) 967 { 968 int error = 0; 969 970 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 971 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 972 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 973 974 return (error); 975 } 976 977 /* 978 * As above, but read-only. 979 */ 980 int 981 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 982 { 983 int error = 0; 984 985 if (newp) 986 return (EPERM); 987 988 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 989 990 return (error); 991 } 992 993 /* 994 * Validate parameters and get old / set new parameters 995 * for a string-valued sysctl function. 996 */ 997 int 998 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 999 int maxlen) 1000 { 1001 int len, error = 0, err2 = 0; 1002 1003 if (newp && newlen >= maxlen) 1004 return (EINVAL); 1005 1006 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1007 1008 if (error == 0 && newp) { 1009 error = copyin(newp, str, newlen); 1010 str[newlen] = 0; 1011 } 1012 return (error); 1013 } 1014 1015 /* 1016 * As above, but read-only. 1017 */ 1018 int 1019 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1020 { 1021 int len, error = 0, err2 = 0; 1022 1023 if (newp) 1024 return (EPERM); 1025 1026 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1027 1028 return (error); 1029 } 1030 1031 /* 1032 * Validate parameters and get old / set new parameters 1033 * for a structure oriented sysctl function. 1034 */ 1035 int 1036 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1037 int len) 1038 { 1039 int error = 0; 1040 1041 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1042 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1043 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1044 1045 return (error); 1046 } 1047 1048 /* 1049 * Validate parameters and get old parameters 1050 * for a structure oriented sysctl function. 1051 */ 1052 int 1053 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1054 int len) 1055 { 1056 int error = 0; 1057 1058 if (newp) 1059 return (EPERM); 1060 1061 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1062 1063 return (error); 1064 } 1065 1066 /* 1067 * As above, but can return a truncated result. 1068 */ 1069 int 1070 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1071 int len) 1072 { 1073 int error = 0; 1074 1075 if (newp) 1076 return (EPERM); 1077 1078 len = min(*oldlenp, len); 1079 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1080 1081 return (error); 1082 } 1083 1084 /* 1085 * Get file structures. 1086 */ 1087 static int 1088 sysctl_file(void *vwhere, size_t *sizep) 1089 { 1090 int buflen, error; 1091 struct file *fp; 1092 char *start, *where; 1093 1094 start = where = vwhere; 1095 buflen = *sizep; 1096 if (where == NULL) { 1097 /* 1098 * overestimate by 10 files 1099 */ 1100 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1101 return (0); 1102 } 1103 1104 /* 1105 * first copyout filehead 1106 */ 1107 if (buflen < sizeof(filehead)) { 1108 *sizep = 0; 1109 return (0); 1110 } 1111 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1112 if (error) 1113 return (error); 1114 buflen -= sizeof(filehead); 1115 where += sizeof(filehead); 1116 1117 /* 1118 * followed by an array of file structures 1119 */ 1120 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1121 if (buflen < sizeof(struct file)) { 1122 *sizep = where - start; 1123 return (ENOMEM); 1124 } 1125 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1126 if (error) 1127 return (error); 1128 buflen -= sizeof(struct file); 1129 where += sizeof(struct file); 1130 } 1131 *sizep = where - start; 1132 return (0); 1133 } 1134 1135 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1136 #define FILL_PERM(src, dst) do { \ 1137 (dst)._key = (src)._key; \ 1138 (dst).uid = (src).uid; \ 1139 (dst).gid = (src).gid; \ 1140 (dst).cuid = (src).cuid; \ 1141 (dst).cgid = (src).cgid; \ 1142 (dst).mode = (src).mode; \ 1143 (dst)._seq = (src)._seq; \ 1144 } while (0); 1145 #define FILL_MSG(src, dst) do { \ 1146 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1147 (dst).msg_qnum = (src).msg_qnum; \ 1148 (dst).msg_qbytes = (src).msg_qbytes; \ 1149 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1150 (dst).msg_lspid = (src).msg_lspid; \ 1151 (dst).msg_lrpid = (src).msg_lrpid; \ 1152 (dst).msg_stime = (src).msg_stime; \ 1153 (dst).msg_rtime = (src).msg_rtime; \ 1154 (dst).msg_ctime = (src).msg_ctime; \ 1155 } while (0) 1156 #define FILL_SEM(src, dst) do { \ 1157 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1158 (dst).sem_nsems = (src).sem_nsems; \ 1159 (dst).sem_otime = (src).sem_otime; \ 1160 (dst).sem_ctime = (src).sem_ctime; \ 1161 } while (0) 1162 #define FILL_SHM(src, dst) do { \ 1163 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1164 (dst).shm_segsz = (src).shm_segsz; \ 1165 (dst).shm_lpid = (src).shm_lpid; \ 1166 (dst).shm_cpid = (src).shm_cpid; \ 1167 (dst).shm_atime = (src).shm_atime; \ 1168 (dst).shm_dtime = (src).shm_dtime; \ 1169 (dst).shm_ctime = (src).shm_ctime; \ 1170 (dst).shm_nattch = (src).shm_nattch; \ 1171 } while (0) 1172 1173 static int 1174 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1175 { 1176 #ifdef SYSVMSG 1177 struct msg_sysctl_info *msgsi; 1178 #endif 1179 #ifdef SYSVSEM 1180 struct sem_sysctl_info *semsi; 1181 #endif 1182 #ifdef SYSVSHM 1183 struct shm_sysctl_info *shmsi; 1184 #endif 1185 size_t infosize, dssize, tsize, buflen; 1186 void *buf = NULL; 1187 char *start; 1188 int32_t nds; 1189 int i, error, ret; 1190 1191 if (namelen != 1) 1192 return (EINVAL); 1193 1194 start = where; 1195 buflen = *sizep; 1196 1197 switch (*name) { 1198 case KERN_SYSVIPC_MSG_INFO: 1199 #ifdef SYSVMSG 1200 infosize = sizeof(msgsi->msginfo); 1201 nds = msginfo.msgmni; 1202 dssize = sizeof(msgsi->msgids[0]); 1203 break; 1204 #else 1205 return (EINVAL); 1206 #endif 1207 case KERN_SYSVIPC_SEM_INFO: 1208 #ifdef SYSVSEM 1209 infosize = sizeof(semsi->seminfo); 1210 nds = seminfo.semmni; 1211 dssize = sizeof(semsi->semids[0]); 1212 break; 1213 #else 1214 return (EINVAL); 1215 #endif 1216 case KERN_SYSVIPC_SHM_INFO: 1217 #ifdef SYSVSHM 1218 infosize = sizeof(shmsi->shminfo); 1219 nds = shminfo.shmmni; 1220 dssize = sizeof(shmsi->shmids[0]); 1221 break; 1222 #else 1223 return (EINVAL); 1224 #endif 1225 default: 1226 return (EINVAL); 1227 } 1228 /* 1229 * Round infosize to 64 bit boundary if requesting more than just 1230 * the info structure or getting the total data size. 1231 */ 1232 if (where == NULL || *sizep > infosize) 1233 infosize = ((infosize + 7) / 8) * 8; 1234 tsize = infosize + nds * dssize; 1235 1236 /* Return just the total size required. */ 1237 if (where == NULL) { 1238 *sizep = tsize; 1239 return (0); 1240 } 1241 1242 /* Not enough room for even the info struct. */ 1243 if (buflen < infosize) { 1244 *sizep = 0; 1245 return (ENOMEM); 1246 } 1247 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1248 memset(buf, 0, min(tsize, buflen)); 1249 1250 switch (*name) { 1251 #ifdef SYSVMSG 1252 case KERN_SYSVIPC_MSG_INFO: 1253 msgsi = (struct msg_sysctl_info *)buf; 1254 msgsi->msginfo = msginfo; 1255 break; 1256 #endif 1257 #ifdef SYSVSEM 1258 case KERN_SYSVIPC_SEM_INFO: 1259 semsi = (struct sem_sysctl_info *)buf; 1260 semsi->seminfo = seminfo; 1261 break; 1262 #endif 1263 #ifdef SYSVSHM 1264 case KERN_SYSVIPC_SHM_INFO: 1265 shmsi = (struct shm_sysctl_info *)buf; 1266 shmsi->shminfo = shminfo; 1267 break; 1268 #endif 1269 } 1270 buflen -= infosize; 1271 1272 ret = 0; 1273 if (buflen > 0) { 1274 /* Fill in the IPC data structures. */ 1275 for (i = 0; i < nds; i++) { 1276 if (buflen < dssize) { 1277 ret = ENOMEM; 1278 break; 1279 } 1280 switch (*name) { 1281 #ifdef SYSVMSG 1282 case KERN_SYSVIPC_MSG_INFO: 1283 FILL_MSG(msqids[i], msgsi->msgids[i]); 1284 break; 1285 #endif 1286 #ifdef SYSVSEM 1287 case KERN_SYSVIPC_SEM_INFO: 1288 FILL_SEM(sema[i], semsi->semids[i]); 1289 break; 1290 #endif 1291 #ifdef SYSVSHM 1292 case KERN_SYSVIPC_SHM_INFO: 1293 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1294 break; 1295 #endif 1296 } 1297 buflen -= dssize; 1298 } 1299 } 1300 *sizep -= buflen; 1301 error = copyout(buf, start, *sizep); 1302 /* If copyout succeeded, use return code set earlier. */ 1303 if (error == 0) 1304 error = ret; 1305 if (buf) 1306 free(buf, M_TEMP); 1307 return (error); 1308 } 1309 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1310 1311 static int 1312 sysctl_msgbuf(void *vwhere, size_t *sizep) 1313 { 1314 char *where = vwhere; 1315 size_t len, maxlen = *sizep; 1316 long beg, end; 1317 int error; 1318 1319 /* 1320 * deal with cases where the message buffer has 1321 * become corrupted. 1322 */ 1323 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1324 msgbufenabled = 0; 1325 return (ENXIO); 1326 } 1327 1328 if (where == NULL) { 1329 /* always return full buffer size */ 1330 *sizep = msgbufp->msg_bufs; 1331 return (0); 1332 } 1333 1334 error = 0; 1335 maxlen = min(msgbufp->msg_bufs, maxlen); 1336 1337 /* 1338 * First, copy from the write pointer to the end of 1339 * message buffer. 1340 */ 1341 beg = msgbufp->msg_bufx; 1342 end = msgbufp->msg_bufs; 1343 while (maxlen > 0) { 1344 len = min(end - beg, maxlen); 1345 if (len == 0) 1346 break; 1347 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1348 if (error) 1349 break; 1350 where += len; 1351 maxlen -= len; 1352 1353 /* 1354 * ... then, copy from the beginning of message buffer to 1355 * the write pointer. 1356 */ 1357 beg = 0; 1358 end = msgbufp->msg_bufx; 1359 } 1360 return (error); 1361 } 1362 1363 /* 1364 * try over estimating by 5 procs 1365 */ 1366 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1367 1368 static int 1369 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1370 { 1371 struct eproc eproc; 1372 struct kinfo_proc2 kproc2; 1373 struct kinfo_proc *dp; 1374 struct proc *p; 1375 const struct proclist_desc *pd; 1376 char *where, *dp2; 1377 int type, op, arg, elem_size, elem_count; 1378 int buflen, needed, error; 1379 1380 dp = vwhere; 1381 dp2 = where = vwhere; 1382 buflen = where != NULL ? *sizep : 0; 1383 error = needed = 0; 1384 type = name[0]; 1385 1386 if (type == KERN_PROC) { 1387 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1388 return (EINVAL); 1389 op = name[1]; 1390 if (op != KERN_PROC_ALL) 1391 arg = name[2]; 1392 } else { 1393 if (namelen != 5) 1394 return (EINVAL); 1395 op = name[1]; 1396 arg = name[2]; 1397 elem_size = name[3]; 1398 elem_count = name[4]; 1399 } 1400 1401 proclist_lock_read(); 1402 1403 pd = proclists; 1404 again: 1405 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1406 /* 1407 * Skip embryonic processes. 1408 */ 1409 if (p->p_stat == SIDL) 1410 continue; 1411 /* 1412 * TODO - make more efficient (see notes below). 1413 * do by session. 1414 */ 1415 switch (op) { 1416 1417 case KERN_PROC_PID: 1418 /* could do this with just a lookup */ 1419 if (p->p_pid != (pid_t)arg) 1420 continue; 1421 break; 1422 1423 case KERN_PROC_PGRP: 1424 /* could do this by traversing pgrp */ 1425 if (p->p_pgrp->pg_id != (pid_t)arg) 1426 continue; 1427 break; 1428 1429 case KERN_PROC_SESSION: 1430 if (p->p_session->s_sid != (pid_t)arg) 1431 continue; 1432 break; 1433 1434 case KERN_PROC_TTY: 1435 if (arg == KERN_PROC_TTY_REVOKE) { 1436 if ((p->p_flag & P_CONTROLT) == 0 || 1437 p->p_session->s_ttyp == NULL || 1438 p->p_session->s_ttyvp != NULL) 1439 continue; 1440 } else if ((p->p_flag & P_CONTROLT) == 0 || 1441 p->p_session->s_ttyp == NULL) { 1442 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1443 continue; 1444 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1445 continue; 1446 break; 1447 1448 case KERN_PROC_UID: 1449 if (p->p_ucred->cr_uid != (uid_t)arg) 1450 continue; 1451 break; 1452 1453 case KERN_PROC_RUID: 1454 if (p->p_cred->p_ruid != (uid_t)arg) 1455 continue; 1456 break; 1457 1458 case KERN_PROC_GID: 1459 if (p->p_ucred->cr_gid != (uid_t)arg) 1460 continue; 1461 break; 1462 1463 case KERN_PROC_RGID: 1464 if (p->p_cred->p_rgid != (uid_t)arg) 1465 continue; 1466 break; 1467 1468 case KERN_PROC_ALL: 1469 /* allow everything */ 1470 break; 1471 1472 default: 1473 error = EINVAL; 1474 goto cleanup; 1475 } 1476 if (type == KERN_PROC) { 1477 if (buflen >= sizeof(struct kinfo_proc)) { 1478 fill_eproc(p, &eproc); 1479 error = copyout((caddr_t)p, &dp->kp_proc, 1480 sizeof(struct proc)); 1481 if (error) 1482 goto cleanup; 1483 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1484 sizeof(eproc)); 1485 if (error) 1486 goto cleanup; 1487 dp++; 1488 buflen -= sizeof(struct kinfo_proc); 1489 } 1490 needed += sizeof(struct kinfo_proc); 1491 } else { /* KERN_PROC2 */ 1492 if (buflen >= elem_size && elem_count > 0) { 1493 fill_kproc2(p, &kproc2); 1494 /* 1495 * Copy out elem_size, but not larger than 1496 * the size of a struct kinfo_proc2. 1497 */ 1498 error = copyout(&kproc2, dp2, 1499 min(sizeof(kproc2), elem_size)); 1500 if (error) 1501 goto cleanup; 1502 dp2 += elem_size; 1503 buflen -= elem_size; 1504 elem_count--; 1505 } 1506 needed += elem_size; 1507 } 1508 } 1509 pd++; 1510 if (pd->pd_list != NULL) 1511 goto again; 1512 proclist_unlock_read(); 1513 1514 if (where != NULL) { 1515 if (type == KERN_PROC) 1516 *sizep = (caddr_t)dp - where; 1517 else 1518 *sizep = dp2 - where; 1519 if (needed > *sizep) 1520 return (ENOMEM); 1521 } else { 1522 needed += KERN_PROCSLOP; 1523 *sizep = needed; 1524 } 1525 return (0); 1526 cleanup: 1527 proclist_unlock_read(); 1528 return (error); 1529 } 1530 1531 /* 1532 * Fill in an eproc structure for the specified process. 1533 */ 1534 void 1535 fill_eproc(struct proc *p, struct eproc *ep) 1536 { 1537 struct tty *tp; 1538 struct lwp *l; 1539 1540 ep->e_paddr = p; 1541 ep->e_sess = p->p_session; 1542 ep->e_pcred = *p->p_cred; 1543 ep->e_ucred = *p->p_ucred; 1544 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1545 ep->e_vm.vm_rssize = 0; 1546 ep->e_vm.vm_tsize = 0; 1547 ep->e_vm.vm_dsize = 0; 1548 ep->e_vm.vm_ssize = 0; 1549 /* ep->e_vm.vm_pmap = XXX; */ 1550 } else { 1551 struct vmspace *vm = p->p_vmspace; 1552 1553 ep->e_vm.vm_rssize = vm_resident_count(vm); 1554 ep->e_vm.vm_tsize = vm->vm_tsize; 1555 ep->e_vm.vm_dsize = vm->vm_dsize; 1556 ep->e_vm.vm_ssize = vm->vm_ssize; 1557 1558 /* Pick a "representative" LWP */ 1559 l = proc_representative_lwp(p); 1560 1561 if (l->l_wmesg) 1562 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1563 } 1564 if (p->p_pptr) 1565 ep->e_ppid = p->p_pptr->p_pid; 1566 else 1567 ep->e_ppid = 0; 1568 ep->e_pgid = p->p_pgrp->pg_id; 1569 ep->e_sid = ep->e_sess->s_sid; 1570 ep->e_jobc = p->p_pgrp->pg_jobc; 1571 if ((p->p_flag & P_CONTROLT) && 1572 (tp = ep->e_sess->s_ttyp)) { 1573 ep->e_tdev = tp->t_dev; 1574 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1575 ep->e_tsess = tp->t_session; 1576 } else 1577 ep->e_tdev = NODEV; 1578 1579 ep->e_xsize = ep->e_xrssize = 0; 1580 ep->e_xccount = ep->e_xswrss = 0; 1581 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1582 if (SESS_LEADER(p)) 1583 ep->e_flag |= EPROC_SLEADER; 1584 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1585 } 1586 1587 /* 1588 * Fill in an eproc structure for the specified process. 1589 */ 1590 static void 1591 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1592 { 1593 struct tty *tp; 1594 struct lwp *l; 1595 memset(ki, 0, sizeof(*ki)); 1596 1597 /* XXX NJWLWP 1598 * These are likely not what the caller was looking for. 1599 * The perils of playing with the kernel data structures... 1600 */ 1601 ki->p_paddr = PTRTOINT64(p); 1602 ki->p_fd = PTRTOINT64(p->p_fd); 1603 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1604 ki->p_stats = PTRTOINT64(p->p_stats); 1605 ki->p_limit = PTRTOINT64(p->p_limit); 1606 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1607 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1608 ki->p_sess = PTRTOINT64(p->p_session); 1609 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1610 ki->p_ru = PTRTOINT64(p->p_ru); 1611 1612 ki->p_eflag = 0; 1613 ki->p_exitsig = p->p_exitsig; 1614 ki->p_flag = p->p_flag; 1615 1616 ki->p_pid = p->p_pid; 1617 if (p->p_pptr) 1618 ki->p_ppid = p->p_pptr->p_pid; 1619 else 1620 ki->p_ppid = 0; 1621 ki->p_sid = p->p_session->s_sid; 1622 ki->p__pgid = p->p_pgrp->pg_id; 1623 1624 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1625 1626 ki->p_uid = p->p_ucred->cr_uid; 1627 ki->p_ruid = p->p_cred->p_ruid; 1628 ki->p_gid = p->p_ucred->cr_gid; 1629 ki->p_rgid = p->p_cred->p_rgid; 1630 1631 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1632 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1633 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1634 1635 ki->p_jobc = p->p_pgrp->pg_jobc; 1636 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1637 ki->p_tdev = tp->t_dev; 1638 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1639 ki->p_tsess = PTRTOINT64(tp->t_session); 1640 } else { 1641 ki->p_tdev = NODEV; 1642 } 1643 1644 ki->p_estcpu = p->p_estcpu; 1645 ki->p_rtime_sec = p->p_rtime.tv_sec; 1646 ki->p_rtime_usec = p->p_rtime.tv_usec; 1647 ki->p_cpticks = p->p_cpticks; 1648 ki->p_pctcpu = p->p_pctcpu; 1649 1650 ki->p_uticks = p->p_uticks; 1651 ki->p_sticks = p->p_sticks; 1652 ki->p_iticks = p->p_iticks; 1653 1654 ki->p_tracep = PTRTOINT64(p->p_tracep); 1655 ki->p_traceflag = p->p_traceflag; 1656 1657 1658 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1659 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1660 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1661 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1662 1663 ki->p_stat = p->p_stat; 1664 ki->p_nice = p->p_nice; 1665 1666 ki->p_xstat = p->p_xstat; 1667 ki->p_acflag = p->p_acflag; 1668 1669 strncpy(ki->p_comm, p->p_comm, 1670 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1671 1672 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1673 1674 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1675 ki->p_vm_rssize = 0; 1676 ki->p_vm_tsize = 0; 1677 ki->p_vm_dsize = 0; 1678 ki->p_vm_ssize = 0; 1679 } else { 1680 struct vmspace *vm = p->p_vmspace; 1681 1682 ki->p_vm_rssize = vm_resident_count(vm); 1683 ki->p_vm_tsize = vm->vm_tsize; 1684 ki->p_vm_dsize = vm->vm_dsize; 1685 ki->p_vm_ssize = vm->vm_ssize; 1686 1687 /* Pick a "representative" LWP */ 1688 l = proc_representative_lwp(p); 1689 ki->p_forw = PTRTOINT64(l->l_forw); 1690 ki->p_back = PTRTOINT64(l->l_back); 1691 ki->p_addr = PTRTOINT64(l->l_addr); 1692 ki->p_stat = l->l_stat; 1693 ki->p_flag |= l->l_flag; 1694 ki->p_swtime = l->l_swtime; 1695 ki->p_slptime = l->l_slptime; 1696 if (l->l_stat == LSONPROC) { 1697 KDASSERT(l->l_cpu != NULL); 1698 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1699 } else 1700 ki->p_schedflags = 0; 1701 ki->p_holdcnt = l->l_holdcnt; 1702 ki->p_priority = l->l_priority; 1703 ki->p_usrpri = l->l_usrpri; 1704 if (l->l_wmesg) 1705 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1706 ki->p_wchan = PTRTOINT64(l->l_wchan); 1707 1708 } 1709 1710 if (p->p_session->s_ttyvp) 1711 ki->p_eflag |= EPROC_CTTY; 1712 if (SESS_LEADER(p)) 1713 ki->p_eflag |= EPROC_SLEADER; 1714 1715 /* XXX Is this double check necessary? */ 1716 if (P_ZOMBIE(p)) { 1717 ki->p_uvalid = 0; 1718 } else { 1719 ki->p_uvalid = 1; 1720 1721 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1722 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1723 1724 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1725 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1726 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1727 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1728 1729 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1730 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1731 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1732 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1733 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1734 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1735 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1736 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1737 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1738 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1739 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1740 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1741 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1742 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1743 1744 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1745 p->p_stats->p_cru.ru_stime.tv_sec; 1746 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1747 p->p_stats->p_cru.ru_stime.tv_usec; 1748 } 1749 #ifdef MULTIPROCESSOR 1750 if (p->p_cpu != NULL) 1751 ki->p_cpuid = p->p_cpu->ci_cpuid; 1752 else 1753 #endif 1754 ki->p_cpuid = KI_NOCPU; 1755 1756 } 1757 1758 1759 1760 1761 int 1762 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1763 struct proc *up) 1764 { 1765 struct ps_strings pss; 1766 struct proc *p; 1767 size_t len, upper_bound, xlen; 1768 struct uio auio; 1769 struct iovec aiov; 1770 vaddr_t argv; 1771 pid_t pid; 1772 int nargv, type, error, i; 1773 char *arg; 1774 char *tmp; 1775 1776 if (namelen != 2) 1777 return (EINVAL); 1778 pid = name[0]; 1779 type = name[1]; 1780 1781 switch (type) { 1782 case KERN_PROC_ARGV: 1783 case KERN_PROC_NARGV: 1784 case KERN_PROC_ENV: 1785 case KERN_PROC_NENV: 1786 /* ok */ 1787 break; 1788 default: 1789 return (EINVAL); 1790 } 1791 1792 /* check pid */ 1793 if ((p = pfind(pid)) == NULL) 1794 return (EINVAL); 1795 1796 /* only root or same user change look at the environment */ 1797 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1798 if (up->p_ucred->cr_uid != 0) { 1799 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1800 up->p_cred->p_ruid != p->p_cred->p_svuid) 1801 return (EPERM); 1802 } 1803 } 1804 1805 if (sizep != NULL && where == NULL) { 1806 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1807 *sizep = sizeof (int); 1808 else 1809 *sizep = ARG_MAX; /* XXX XXX XXX */ 1810 return (0); 1811 } 1812 if (where == NULL || sizep == NULL) 1813 return (EINVAL); 1814 1815 /* 1816 * Zombies don't have a stack, so we can't read their psstrings. 1817 * System processes also don't have a user stack. 1818 */ 1819 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1820 return (EINVAL); 1821 1822 /* 1823 * Lock the process down in memory. 1824 */ 1825 /* XXXCDC: how should locking work here? */ 1826 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1827 return (EFAULT); 1828 1829 p->p_vmspace->vm_refcnt++; /* XXX */ 1830 1831 /* 1832 * Allocate a temporary buffer to hold the arguments. 1833 */ 1834 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1835 1836 /* 1837 * Read in the ps_strings structure. 1838 */ 1839 aiov.iov_base = &pss; 1840 aiov.iov_len = sizeof(pss); 1841 auio.uio_iov = &aiov; 1842 auio.uio_iovcnt = 1; 1843 auio.uio_offset = (vaddr_t)p->p_psstr; 1844 auio.uio_resid = sizeof(pss); 1845 auio.uio_segflg = UIO_SYSSPACE; 1846 auio.uio_rw = UIO_READ; 1847 auio.uio_procp = NULL; 1848 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1849 if (error) 1850 goto done; 1851 1852 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1853 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1854 else 1855 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1856 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1857 error = copyout(&nargv, where, sizeof(nargv)); 1858 *sizep = sizeof(nargv); 1859 goto done; 1860 } 1861 /* 1862 * Now read the address of the argument vector. 1863 */ 1864 switch (type) { 1865 case KERN_PROC_ARGV: 1866 /* XXX compat32 stuff here */ 1867 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1868 break; 1869 case KERN_PROC_ENV: 1870 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1871 break; 1872 default: 1873 return (EINVAL); 1874 } 1875 auio.uio_offset = (off_t)(long)tmp; 1876 aiov.iov_base = &argv; 1877 aiov.iov_len = sizeof(argv); 1878 auio.uio_iov = &aiov; 1879 auio.uio_iovcnt = 1; 1880 auio.uio_resid = sizeof(argv); 1881 auio.uio_segflg = UIO_SYSSPACE; 1882 auio.uio_rw = UIO_READ; 1883 auio.uio_procp = NULL; 1884 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1885 if (error) 1886 goto done; 1887 1888 /* 1889 * Now copy in the actual argument vector, one page at a time, 1890 * since we don't know how long the vector is (though, we do 1891 * know how many NUL-terminated strings are in the vector). 1892 */ 1893 len = 0; 1894 upper_bound = *sizep; 1895 for (; nargv != 0 && len < upper_bound; len += xlen) { 1896 aiov.iov_base = arg; 1897 aiov.iov_len = PAGE_SIZE; 1898 auio.uio_iov = &aiov; 1899 auio.uio_iovcnt = 1; 1900 auio.uio_offset = argv + len; 1901 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1902 auio.uio_resid = xlen; 1903 auio.uio_segflg = UIO_SYSSPACE; 1904 auio.uio_rw = UIO_READ; 1905 auio.uio_procp = NULL; 1906 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1907 if (error) 1908 goto done; 1909 1910 for (i = 0; i < xlen && nargv != 0; i++) { 1911 if (arg[i] == '\0') 1912 nargv--; /* one full string */ 1913 } 1914 1915 /* make sure we don't copyout past the end of the user's buffer */ 1916 if (len + i > upper_bound) 1917 i = upper_bound - len; 1918 1919 error = copyout(arg, (char *)where + len, i); 1920 if (error) 1921 break; 1922 1923 if (nargv == 0) { 1924 len += i; 1925 break; 1926 } 1927 } 1928 *sizep = len; 1929 1930 done: 1931 uvmspace_free(p->p_vmspace); 1932 1933 free(arg, M_TEMP); 1934 return (error); 1935 } 1936 1937 #if NPTY > 0 1938 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1939 1940 /* 1941 * Validate parameters and get old / set new parameters 1942 * for pty sysctl function. 1943 */ 1944 static int 1945 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 1946 { 1947 int error = 0; 1948 int oldmax = 0, newmax = 0; 1949 1950 /* get current value of maxptys */ 1951 oldmax = pty_maxptys(0, 0); 1952 1953 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1954 1955 if (!error && newp) { 1956 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1957 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1958 1959 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1960 return (EINVAL); 1961 1962 } 1963 1964 return (error); 1965 } 1966 #endif /* NPTY > 0 */ 1967 1968 static int 1969 sysctl_dotkstat(name, namelen, where, sizep, newp) 1970 int *name; 1971 u_int namelen; 1972 void *where; 1973 size_t *sizep; 1974 void *newp; 1975 { 1976 /* all sysctl names at this level are terminal */ 1977 if (namelen != 1) 1978 return (ENOTDIR); /* overloaded */ 1979 1980 switch (name[0]) { 1981 case KERN_TKSTAT_NIN: 1982 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 1983 case KERN_TKSTAT_NOUT: 1984 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 1985 case KERN_TKSTAT_CANCC: 1986 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 1987 case KERN_TKSTAT_RAWCC: 1988 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 1989 default: 1990 return (EOPNOTSUPP); 1991 } 1992 } 1993
Indexes created Tue Sep 30 11:09:46 GMT 2025