kern_sysctl.c revision 1.115
1 /* $NetBSD: kern_sysctl.c,v 1.115 2002/11/07 00:22:29 manu 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 1.115 2002/11/07 00:22:29 manu 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 size_t len, curlen; 708 u_int i; 709 710 if (namelen < 2) 711 return EINVAL; 712 713 if (name[0] == PROC_CURPROC) { 714 ptmp = p; 715 } else { 716 proclist_lock_read(); 717 for (pd = proclists; pd->pd_list != NULL; pd++) { 718 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 719 ptmp = LIST_NEXT(ptmp, p_list)) { 720 /* Skip embryonic processes. */ 721 if (ptmp->p_stat == SIDL) 722 continue; 723 if (ptmp->p_pid == (pid_t)name[0]) 724 break; 725 } 726 if (ptmp != NULL) 727 break; 728 } 729 proclist_unlock_read(); 730 if (ptmp == NULL) 731 return(ESRCH); 732 if (p->p_ucred->cr_uid != 0) { 733 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 734 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 735 return EPERM; 736 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 737 return EPERM; /* sgid proc */ 738 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 739 if (p->p_ucred->cr_groups[i] == 740 ptmp->p_cred->p_rgid) 741 break; 742 } 743 if (i == p->p_ucred->cr_ngroups) 744 return EPERM; 745 } 746 } 747 switch(name[1]) { 748 case PROC_PID_STOPFORK: 749 if (namelen != 2) 750 return EINVAL; 751 i = ((ptmp->p_flag & P_STOPFORK) != 0); 752 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 753 return error; 754 if (i != 0) 755 ptmp->p_flag |= P_STOPFORK; 756 else 757 ptmp->p_flag &= ~P_STOPFORK; 758 return 0; 759 break; 760 761 case PROC_PID_STOPEXEC: 762 if (namelen != 2) 763 return EINVAL; 764 i = ((ptmp->p_flag & P_STOPEXEC) != 0); 765 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 766 return error; 767 if (i != 0) 768 ptmp->p_flag |= P_STOPEXEC; 769 else 770 ptmp->p_flag &= ~P_STOPEXEC; 771 return 0; 772 break; 773 774 case PROC_PID_CORENAME: 775 if (namelen != 2) 776 return EINVAL; 777 /* 778 * Can't use sysctl_string() here because we may malloc a new 779 * area during the process, so we have to do it by hand. 780 */ 781 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 782 if (oldlenp && *oldlenp < curlen) { 783 if (!oldp) 784 *oldlenp = curlen; 785 return (ENOMEM); 786 } 787 if (newp) { 788 if (securelevel > 2) 789 return EPERM; 790 if (newlen > MAXPATHLEN) 791 return ENAMETOOLONG; 792 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 793 if (tmps == NULL) 794 return ENOMEM; 795 error = copyin(newp, tmps, newlen + 1); 796 tmps[newlen] = '\0'; 797 if (error) 798 goto cleanup; 799 /* Enforce to be either 'core' for end with '.core' */ 800 if (newlen < 4) { /* c.o.r.e */ 801 error = EINVAL; 802 goto cleanup; 803 } 804 len = newlen - 4; 805 if (len > 0) { 806 if (tmps[len - 1] != '.' && 807 tmps[len - 1] != '/') { 808 error = EINVAL; 809 goto cleanup; 810 } 811 } 812 if (strcmp(&tmps[len], "core") != 0) { 813 error = EINVAL; 814 goto cleanup; 815 } 816 } 817 if (oldp && oldlenp) { 818 *oldlenp = curlen; 819 error = copyout(ptmp->p_limit->pl_corename, oldp, 820 curlen); 821 } 822 if (newp && error == 0) { 823 /* if the 2 strings are identical, don't limcopy() */ 824 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 825 error = 0; 826 goto cleanup; 827 } 828 if (ptmp->p_limit->p_refcnt > 1 && 829 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 830 newplim = limcopy(ptmp->p_limit); 831 limfree(ptmp->p_limit); 832 ptmp->p_limit = newplim; 833 } 834 if (ptmp->p_limit->pl_corename != defcorename) { 835 free(ptmp->p_limit->pl_corename, M_TEMP); 836 } 837 ptmp->p_limit->pl_corename = tmps; 838 return (0); 839 } 840 cleanup: 841 if (tmps) 842 free(tmps, M_TEMP); 843 return (error); 844 break; 845 846 case PROC_PID_LIMIT: 847 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 848 return EINVAL; 849 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 850 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 851 error = sysctl_quad(oldp, oldlenp, newp, newlen, 852 &alim.rlim_max); 853 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 854 error = sysctl_quad(oldp, oldlenp, newp, newlen, 855 &alim.rlim_cur); 856 else 857 error = EINVAL; 858 859 if (error) 860 return error; 861 862 if (newp) 863 error = dosetrlimit(ptmp, p->p_cred, 864 name[2] - 1, &alim); 865 return error; 866 break; 867 868 default: 869 return (EINVAL); 870 break; 871 } 872 /* NOTREACHED */ 873 return (EINVAL); 874 } 875 876 int 877 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 878 void *newp, size_t newlen, struct proc *p) 879 { 880 static struct { 881 const char *name; 882 int type; 883 } emulations[] = CTL_EMUL_NAMES; 884 const struct emul *e; 885 const char *ename; 886 #ifdef LKM 887 extern struct lock exec_lock; /* XXX */ 888 int error; 889 #else 890 extern int nexecs_builtin; 891 extern const struct execsw execsw_builtin[]; 892 int i; 893 #endif 894 895 /* all sysctl names at this level are name and field */ 896 if (namelen < 2) 897 return (ENOTDIR); /* overloaded */ 898 899 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 900 return (EOPNOTSUPP); 901 902 ename = emulations[name[0]].name; 903 904 #ifdef LKM 905 lockmgr(&exec_lock, LK_SHARED, NULL); 906 if ((e = emul_search(ename))) { 907 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 908 newp, newlen, p); 909 } else 910 error = EOPNOTSUPP; 911 lockmgr(&exec_lock, LK_RELEASE, NULL); 912 913 return (error); 914 #else 915 for (i = 0; i < nexecs_builtin; i++) { 916 e = execsw_builtin[i].es_emul; 917 if (e == NULL || strcmp(ename, e->e_name) != 0 || 918 e->e_sysctl != NULL) 919 continue; 920 921 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 922 newp, newlen, p); 923 } 924 925 return (EOPNOTSUPP); 926 #endif 927 } 928 /* 929 * Convenience macros. 930 */ 931 932 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 933 if (oldlenp) { \ 934 if (!oldp) \ 935 *oldlenp = len; \ 936 else { \ 937 if (*oldlenp < len) \ 938 return(ENOMEM); \ 939 *oldlenp = len; \ 940 error = copyout((caddr_t)valp, oldp, len); \ 941 } \ 942 } 943 944 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 945 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 946 947 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 948 if (newp && newlen != len) \ 949 return (EINVAL); 950 951 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 952 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 953 954 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 955 if (error == 0 && newp) \ 956 error = copyin(newp, valp, len); 957 958 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 959 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 960 961 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 962 if (oldlenp) { \ 963 len = strlen(str) + 1; \ 964 if (!oldp) \ 965 *oldlenp = len; \ 966 else { \ 967 if (*oldlenp < len) { \ 968 err2 = ENOMEM; \ 969 len = *oldlenp; \ 970 } else \ 971 *oldlenp = len; \ 972 error = copyout(str, oldp, len);\ 973 if (error == 0) \ 974 error = err2; \ 975 } \ 976 } 977 978 /* 979 * Validate parameters and get old / set new parameters 980 * for an integer-valued sysctl function. 981 */ 982 int 983 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 984 { 985 int error = 0; 986 987 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 988 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 989 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 990 991 return (error); 992 } 993 994 995 /* 996 * As above, but read-only. 997 */ 998 int 999 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1000 { 1001 int error = 0; 1002 1003 if (newp) 1004 return (EPERM); 1005 1006 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1007 1008 return (error); 1009 } 1010 1011 /* 1012 * Validate parameters and get old / set new parameters 1013 * for an quad-valued sysctl function. 1014 */ 1015 int 1016 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1017 quad_t *valp) 1018 { 1019 int error = 0; 1020 1021 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1022 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1023 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1024 1025 return (error); 1026 } 1027 1028 /* 1029 * As above, but read-only. 1030 */ 1031 int 1032 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1033 { 1034 int error = 0; 1035 1036 if (newp) 1037 return (EPERM); 1038 1039 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1040 1041 return (error); 1042 } 1043 1044 /* 1045 * Validate parameters and get old / set new parameters 1046 * for a string-valued sysctl function. 1047 */ 1048 int 1049 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1050 size_t maxlen) 1051 { 1052 int error = 0, err2 = 0; 1053 size_t len; 1054 1055 if (newp && newlen >= maxlen) 1056 return (EINVAL); 1057 1058 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1059 1060 if (error == 0 && newp) { 1061 error = copyin(newp, str, newlen); 1062 str[newlen] = 0; 1063 } 1064 return (error); 1065 } 1066 1067 /* 1068 * As above, but read-only. 1069 */ 1070 int 1071 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1072 { 1073 int error = 0, err2 = 0; 1074 size_t len; 1075 1076 if (newp) 1077 return (EPERM); 1078 1079 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1080 1081 return (error); 1082 } 1083 1084 /* 1085 * Validate parameters and get old / set new parameters 1086 * for a structure oriented sysctl function. 1087 */ 1088 int 1089 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1090 size_t len) 1091 { 1092 int error = 0; 1093 1094 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1095 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1096 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1097 1098 return (error); 1099 } 1100 1101 /* 1102 * Validate parameters and get old parameters 1103 * for a structure oriented sysctl function. 1104 */ 1105 int 1106 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1107 size_t len) 1108 { 1109 int error = 0; 1110 1111 if (newp) 1112 return (EPERM); 1113 1114 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1115 1116 return (error); 1117 } 1118 1119 /* 1120 * As above, but can return a truncated result. 1121 */ 1122 int 1123 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1124 size_t len) 1125 { 1126 int error = 0; 1127 1128 if (newp) 1129 return (EPERM); 1130 1131 len = min(*oldlenp, len); 1132 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1133 1134 return (error); 1135 } 1136 1137 /* 1138 * Get file structures. 1139 */ 1140 static int 1141 sysctl_file(void *vwhere, size_t *sizep) 1142 { 1143 int error; 1144 size_t buflen; 1145 struct file *fp; 1146 char *start, *where; 1147 1148 start = where = vwhere; 1149 buflen = *sizep; 1150 if (where == NULL) { 1151 /* 1152 * overestimate by 10 files 1153 */ 1154 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1155 return (0); 1156 } 1157 1158 /* 1159 * first copyout filehead 1160 */ 1161 if (buflen < sizeof(filehead)) { 1162 *sizep = 0; 1163 return (0); 1164 } 1165 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1166 if (error) 1167 return (error); 1168 buflen -= sizeof(filehead); 1169 where += sizeof(filehead); 1170 1171 /* 1172 * followed by an array of file structures 1173 */ 1174 LIST_FOREACH(fp, &filehead, f_list) { 1175 if (buflen < sizeof(struct file)) { 1176 *sizep = where - start; 1177 return (ENOMEM); 1178 } 1179 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1180 if (error) 1181 return (error); 1182 buflen -= sizeof(struct file); 1183 where += sizeof(struct file); 1184 } 1185 *sizep = where - start; 1186 return (0); 1187 } 1188 1189 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1190 #define FILL_PERM(src, dst) do { \ 1191 (dst)._key = (src)._key; \ 1192 (dst).uid = (src).uid; \ 1193 (dst).gid = (src).gid; \ 1194 (dst).cuid = (src).cuid; \ 1195 (dst).cgid = (src).cgid; \ 1196 (dst).mode = (src).mode; \ 1197 (dst)._seq = (src)._seq; \ 1198 } while (/*CONSTCOND*/ 0); 1199 #define FILL_MSG(src, dst) do { \ 1200 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1201 (dst).msg_qnum = (src).msg_qnum; \ 1202 (dst).msg_qbytes = (src).msg_qbytes; \ 1203 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1204 (dst).msg_lspid = (src).msg_lspid; \ 1205 (dst).msg_lrpid = (src).msg_lrpid; \ 1206 (dst).msg_stime = (src).msg_stime; \ 1207 (dst).msg_rtime = (src).msg_rtime; \ 1208 (dst).msg_ctime = (src).msg_ctime; \ 1209 } while (/*CONSTCOND*/ 0) 1210 #define FILL_SEM(src, dst) do { \ 1211 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1212 (dst).sem_nsems = (src).sem_nsems; \ 1213 (dst).sem_otime = (src).sem_otime; \ 1214 (dst).sem_ctime = (src).sem_ctime; \ 1215 } while (/*CONSTCOND*/ 0) 1216 #define FILL_SHM(src, dst) do { \ 1217 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1218 (dst).shm_segsz = (src).shm_segsz; \ 1219 (dst).shm_lpid = (src).shm_lpid; \ 1220 (dst).shm_cpid = (src).shm_cpid; \ 1221 (dst).shm_atime = (src).shm_atime; \ 1222 (dst).shm_dtime = (src).shm_dtime; \ 1223 (dst).shm_ctime = (src).shm_ctime; \ 1224 (dst).shm_nattch = (src).shm_nattch; \ 1225 } while (/*CONSTCOND*/ 0) 1226 1227 static int 1228 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1229 { 1230 #ifdef SYSVMSG 1231 struct msg_sysctl_info *msgsi; 1232 #endif 1233 #ifdef SYSVSEM 1234 struct sem_sysctl_info *semsi; 1235 #endif 1236 #ifdef SYSVSHM 1237 struct shm_sysctl_info *shmsi; 1238 #endif 1239 size_t infosize, dssize, tsize, buflen; 1240 void *buf = NULL; 1241 char *start; 1242 int32_t nds; 1243 int i, error, ret; 1244 1245 if (namelen != 1) 1246 return (EINVAL); 1247 1248 start = where; 1249 buflen = *sizep; 1250 1251 switch (*name) { 1252 case KERN_SYSVIPC_MSG_INFO: 1253 #ifdef SYSVMSG 1254 infosize = sizeof(msgsi->msginfo); 1255 nds = msginfo.msgmni; 1256 dssize = sizeof(msgsi->msgids[0]); 1257 break; 1258 #else 1259 return (EINVAL); 1260 #endif 1261 case KERN_SYSVIPC_SEM_INFO: 1262 #ifdef SYSVSEM 1263 infosize = sizeof(semsi->seminfo); 1264 nds = seminfo.semmni; 1265 dssize = sizeof(semsi->semids[0]); 1266 break; 1267 #else 1268 return (EINVAL); 1269 #endif 1270 case KERN_SYSVIPC_SHM_INFO: 1271 #ifdef SYSVSHM 1272 infosize = sizeof(shmsi->shminfo); 1273 nds = shminfo.shmmni; 1274 dssize = sizeof(shmsi->shmids[0]); 1275 break; 1276 #else 1277 return (EINVAL); 1278 #endif 1279 default: 1280 return (EINVAL); 1281 } 1282 /* 1283 * Round infosize to 64 bit boundary if requesting more than just 1284 * the info structure or getting the total data size. 1285 */ 1286 if (where == NULL || *sizep > infosize) 1287 infosize = ((infosize + 7) / 8) * 8; 1288 tsize = infosize + nds * dssize; 1289 1290 /* Return just the total size required. */ 1291 if (where == NULL) { 1292 *sizep = tsize; 1293 return (0); 1294 } 1295 1296 /* Not enough room for even the info struct. */ 1297 if (buflen < infosize) { 1298 *sizep = 0; 1299 return (ENOMEM); 1300 } 1301 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1302 memset(buf, 0, min(tsize, buflen)); 1303 1304 switch (*name) { 1305 #ifdef SYSVMSG 1306 case KERN_SYSVIPC_MSG_INFO: 1307 msgsi = (struct msg_sysctl_info *)buf; 1308 msgsi->msginfo = msginfo; 1309 break; 1310 #endif 1311 #ifdef SYSVSEM 1312 case KERN_SYSVIPC_SEM_INFO: 1313 semsi = (struct sem_sysctl_info *)buf; 1314 semsi->seminfo = seminfo; 1315 break; 1316 #endif 1317 #ifdef SYSVSHM 1318 case KERN_SYSVIPC_SHM_INFO: 1319 shmsi = (struct shm_sysctl_info *)buf; 1320 shmsi->shminfo = shminfo; 1321 break; 1322 #endif 1323 } 1324 buflen -= infosize; 1325 1326 ret = 0; 1327 if (buflen > 0) { 1328 /* Fill in the IPC data structures. */ 1329 for (i = 0; i < nds; i++) { 1330 if (buflen < dssize) { 1331 ret = ENOMEM; 1332 break; 1333 } 1334 switch (*name) { 1335 #ifdef SYSVMSG 1336 case KERN_SYSVIPC_MSG_INFO: 1337 FILL_MSG(msqids[i], msgsi->msgids[i]); 1338 break; 1339 #endif 1340 #ifdef SYSVSEM 1341 case KERN_SYSVIPC_SEM_INFO: 1342 FILL_SEM(sema[i], semsi->semids[i]); 1343 break; 1344 #endif 1345 #ifdef SYSVSHM 1346 case KERN_SYSVIPC_SHM_INFO: 1347 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1348 break; 1349 #endif 1350 } 1351 buflen -= dssize; 1352 } 1353 } 1354 *sizep -= buflen; 1355 error = copyout(buf, start, *sizep); 1356 /* If copyout succeeded, use return code set earlier. */ 1357 if (error == 0) 1358 error = ret; 1359 if (buf) 1360 free(buf, M_TEMP); 1361 return (error); 1362 } 1363 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1364 1365 static int 1366 sysctl_msgbuf(void *vwhere, size_t *sizep) 1367 { 1368 char *where = vwhere; 1369 size_t len, maxlen = *sizep; 1370 long beg, end; 1371 int error; 1372 1373 /* 1374 * deal with cases where the message buffer has 1375 * become corrupted. 1376 */ 1377 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1378 msgbufenabled = 0; 1379 return (ENXIO); 1380 } 1381 1382 if (where == NULL) { 1383 /* always return full buffer size */ 1384 *sizep = msgbufp->msg_bufs; 1385 return (0); 1386 } 1387 1388 error = 0; 1389 maxlen = min(msgbufp->msg_bufs, maxlen); 1390 1391 /* 1392 * First, copy from the write pointer to the end of 1393 * message buffer. 1394 */ 1395 beg = msgbufp->msg_bufx; 1396 end = msgbufp->msg_bufs; 1397 while (maxlen > 0) { 1398 len = min(end - beg, maxlen); 1399 if (len == 0) 1400 break; 1401 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1402 if (error) 1403 break; 1404 where += len; 1405 maxlen -= len; 1406 1407 /* 1408 * ... then, copy from the beginning of message buffer to 1409 * the write pointer. 1410 */ 1411 beg = 0; 1412 end = msgbufp->msg_bufx; 1413 } 1414 return (error); 1415 } 1416 1417 /* 1418 * try over estimating by 5 procs 1419 */ 1420 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1421 1422 static int 1423 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1424 { 1425 struct eproc eproc; 1426 struct kinfo_proc2 kproc2; 1427 struct kinfo_proc *dp; 1428 struct proc *p; 1429 const struct proclist_desc *pd; 1430 char *where, *dp2; 1431 int type, op, arg; 1432 u_int elem_size, elem_count; 1433 size_t buflen, needed; 1434 int error; 1435 1436 dp = vwhere; 1437 dp2 = where = vwhere; 1438 buflen = where != NULL ? *sizep : 0; 1439 error = 0; 1440 needed = 0; 1441 type = name[0]; 1442 1443 if (type == KERN_PROC) { 1444 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1445 return (EINVAL); 1446 op = name[1]; 1447 if (op != KERN_PROC_ALL) 1448 arg = name[2]; 1449 } else { 1450 if (namelen != 5) 1451 return (EINVAL); 1452 op = name[1]; 1453 arg = name[2]; 1454 elem_size = name[3]; 1455 elem_count = name[4]; 1456 } 1457 1458 proclist_lock_read(); 1459 1460 pd = proclists; 1461 again: 1462 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1463 /* 1464 * Skip embryonic processes. 1465 */ 1466 if (p->p_stat == SIDL) 1467 continue; 1468 /* 1469 * TODO - make more efficient (see notes below). 1470 * do by session. 1471 */ 1472 switch (op) { 1473 1474 case KERN_PROC_PID: 1475 /* could do this with just a lookup */ 1476 if (p->p_pid != (pid_t)arg) 1477 continue; 1478 break; 1479 1480 case KERN_PROC_PGRP: 1481 /* could do this by traversing pgrp */ 1482 if (p->p_pgrp->pg_id != (pid_t)arg) 1483 continue; 1484 break; 1485 1486 case KERN_PROC_SESSION: 1487 if (p->p_session->s_sid != (pid_t)arg) 1488 continue; 1489 break; 1490 1491 case KERN_PROC_TTY: 1492 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1493 if ((p->p_flag & P_CONTROLT) == 0 || 1494 p->p_session->s_ttyp == NULL || 1495 p->p_session->s_ttyvp != NULL) 1496 continue; 1497 } else if ((p->p_flag & P_CONTROLT) == 0 || 1498 p->p_session->s_ttyp == NULL) { 1499 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1500 continue; 1501 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1502 continue; 1503 break; 1504 1505 case KERN_PROC_UID: 1506 if (p->p_ucred->cr_uid != (uid_t)arg) 1507 continue; 1508 break; 1509 1510 case KERN_PROC_RUID: 1511 if (p->p_cred->p_ruid != (uid_t)arg) 1512 continue; 1513 break; 1514 1515 case KERN_PROC_GID: 1516 if (p->p_ucred->cr_gid != (uid_t)arg) 1517 continue; 1518 break; 1519 1520 case KERN_PROC_RGID: 1521 if (p->p_cred->p_rgid != (uid_t)arg) 1522 continue; 1523 break; 1524 1525 case KERN_PROC_ALL: 1526 /* allow everything */ 1527 break; 1528 1529 default: 1530 error = EINVAL; 1531 goto cleanup; 1532 } 1533 if (type == KERN_PROC) { 1534 if (buflen >= sizeof(struct kinfo_proc)) { 1535 fill_eproc(p, &eproc); 1536 error = copyout((caddr_t)p, &dp->kp_proc, 1537 sizeof(struct proc)); 1538 if (error) 1539 goto cleanup; 1540 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1541 sizeof(eproc)); 1542 if (error) 1543 goto cleanup; 1544 dp++; 1545 buflen -= sizeof(struct kinfo_proc); 1546 } 1547 needed += sizeof(struct kinfo_proc); 1548 } else { /* KERN_PROC2 */ 1549 if (buflen >= elem_size && elem_count > 0) { 1550 fill_kproc2(p, &kproc2); 1551 /* 1552 * Copy out elem_size, but not larger than 1553 * the size of a struct kinfo_proc2. 1554 */ 1555 error = copyout(&kproc2, dp2, 1556 min(sizeof(kproc2), elem_size)); 1557 if (error) 1558 goto cleanup; 1559 dp2 += elem_size; 1560 buflen -= elem_size; 1561 elem_count--; 1562 } 1563 needed += elem_size; 1564 } 1565 } 1566 pd++; 1567 if (pd->pd_list != NULL) 1568 goto again; 1569 proclist_unlock_read(); 1570 1571 if (where != NULL) { 1572 if (type == KERN_PROC) 1573 *sizep = (caddr_t)dp - where; 1574 else 1575 *sizep = dp2 - where; 1576 if (needed > *sizep) 1577 return (ENOMEM); 1578 } else { 1579 needed += KERN_PROCSLOP; 1580 *sizep = needed; 1581 } 1582 return (0); 1583 cleanup: 1584 proclist_unlock_read(); 1585 return (error); 1586 } 1587 1588 /* 1589 * Fill in an eproc structure for the specified process. 1590 */ 1591 void 1592 fill_eproc(struct proc *p, struct eproc *ep) 1593 { 1594 struct tty *tp; 1595 1596 ep->e_paddr = p; 1597 ep->e_sess = p->p_session; 1598 ep->e_pcred = *p->p_cred; 1599 ep->e_ucred = *p->p_ucred; 1600 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1601 ep->e_vm.vm_rssize = 0; 1602 ep->e_vm.vm_tsize = 0; 1603 ep->e_vm.vm_dsize = 0; 1604 ep->e_vm.vm_ssize = 0; 1605 /* ep->e_vm.vm_pmap = XXX; */ 1606 } else { 1607 struct vmspace *vm = p->p_vmspace; 1608 1609 ep->e_vm.vm_rssize = vm_resident_count(vm); 1610 ep->e_vm.vm_tsize = vm->vm_tsize; 1611 ep->e_vm.vm_dsize = vm->vm_dsize; 1612 ep->e_vm.vm_ssize = vm->vm_ssize; 1613 } 1614 if (p->p_pptr) 1615 ep->e_ppid = p->p_pptr->p_pid; 1616 else 1617 ep->e_ppid = 0; 1618 ep->e_pgid = p->p_pgrp->pg_id; 1619 ep->e_sid = ep->e_sess->s_sid; 1620 ep->e_jobc = p->p_pgrp->pg_jobc; 1621 if ((p->p_flag & P_CONTROLT) && 1622 (tp = ep->e_sess->s_ttyp)) { 1623 ep->e_tdev = tp->t_dev; 1624 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1625 ep->e_tsess = tp->t_session; 1626 } else 1627 ep->e_tdev = NODEV; 1628 if (p->p_wmesg) 1629 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1630 ep->e_xsize = ep->e_xrssize = 0; 1631 ep->e_xccount = ep->e_xswrss = 0; 1632 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1633 if (SESS_LEADER(p)) 1634 ep->e_flag |= EPROC_SLEADER; 1635 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1636 } 1637 1638 /* 1639 * Fill in an eproc structure for the specified process. 1640 */ 1641 static void 1642 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1643 { 1644 struct tty *tp; 1645 1646 memset(ki, 0, sizeof(*ki)); 1647 1648 ki->p_forw = PTRTOINT64(p->p_forw); 1649 ki->p_back = PTRTOINT64(p->p_back); 1650 ki->p_paddr = PTRTOINT64(p); 1651 1652 ki->p_addr = PTRTOINT64(p->p_addr); 1653 ki->p_fd = PTRTOINT64(p->p_fd); 1654 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1655 ki->p_stats = PTRTOINT64(p->p_stats); 1656 ki->p_limit = PTRTOINT64(p->p_limit); 1657 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1658 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1659 ki->p_sess = PTRTOINT64(p->p_session); 1660 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1661 ki->p_ru = PTRTOINT64(p->p_ru); 1662 1663 ki->p_eflag = 0; 1664 ki->p_exitsig = p->p_exitsig; 1665 ki->p_flag = p->p_flag; 1666 1667 ki->p_pid = p->p_pid; 1668 if (p->p_pptr) 1669 ki->p_ppid = p->p_pptr->p_pid; 1670 else 1671 ki->p_ppid = 0; 1672 ki->p_sid = p->p_session->s_sid; 1673 ki->p__pgid = p->p_pgrp->pg_id; 1674 1675 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1676 1677 ki->p_uid = p->p_ucred->cr_uid; 1678 ki->p_ruid = p->p_cred->p_ruid; 1679 ki->p_gid = p->p_ucred->cr_gid; 1680 ki->p_rgid = p->p_cred->p_rgid; 1681 1682 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1683 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1684 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1685 1686 ki->p_jobc = p->p_pgrp->pg_jobc; 1687 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1688 ki->p_tdev = tp->t_dev; 1689 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1690 ki->p_tsess = PTRTOINT64(tp->t_session); 1691 } else { 1692 ki->p_tdev = NODEV; 1693 } 1694 1695 ki->p_estcpu = p->p_estcpu; 1696 ki->p_rtime_sec = p->p_rtime.tv_sec; 1697 ki->p_rtime_usec = p->p_rtime.tv_usec; 1698 ki->p_cpticks = p->p_cpticks; 1699 ki->p_pctcpu = p->p_pctcpu; 1700 ki->p_swtime = p->p_swtime; 1701 ki->p_slptime = p->p_slptime; 1702 if (p->p_stat == SONPROC) { 1703 KDASSERT(p->p_cpu != NULL); 1704 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1705 } else 1706 ki->p_schedflags = 0; 1707 1708 ki->p_uticks = p->p_uticks; 1709 ki->p_sticks = p->p_sticks; 1710 ki->p_iticks = p->p_iticks; 1711 1712 ki->p_tracep = PTRTOINT64(p->p_tracep); 1713 ki->p_traceflag = p->p_traceflag; 1714 1715 ki->p_holdcnt = p->p_holdcnt; 1716 1717 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1718 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1719 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1720 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1721 1722 ki->p_stat = p->p_stat; 1723 ki->p_priority = p->p_priority; 1724 ki->p_usrpri = p->p_usrpri; 1725 ki->p_nice = p->p_nice; 1726 1727 ki->p_xstat = p->p_xstat; 1728 ki->p_acflag = p->p_acflag; 1729 1730 strncpy(ki->p_comm, p->p_comm, 1731 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1732 1733 if (p->p_wmesg) 1734 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1735 ki->p_wchan = PTRTOINT64(p->p_wchan); 1736 1737 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1738 1739 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1740 ki->p_vm_rssize = 0; 1741 ki->p_vm_tsize = 0; 1742 ki->p_vm_dsize = 0; 1743 ki->p_vm_ssize = 0; 1744 } else { 1745 struct vmspace *vm = p->p_vmspace; 1746 1747 ki->p_vm_rssize = vm_resident_count(vm); 1748 ki->p_vm_tsize = vm->vm_tsize; 1749 ki->p_vm_dsize = vm->vm_dsize; 1750 ki->p_vm_ssize = vm->vm_ssize; 1751 } 1752 1753 if (p->p_session->s_ttyvp) 1754 ki->p_eflag |= EPROC_CTTY; 1755 if (SESS_LEADER(p)) 1756 ki->p_eflag |= EPROC_SLEADER; 1757 1758 /* XXX Is this double check necessary? */ 1759 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1760 ki->p_uvalid = 0; 1761 } else { 1762 ki->p_uvalid = 1; 1763 1764 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1765 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1766 1767 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1768 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1769 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1770 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1771 1772 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1773 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1774 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1775 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1776 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1777 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1778 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1779 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1780 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1781 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1782 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1783 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1784 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1785 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1786 1787 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1788 p->p_stats->p_cru.ru_stime.tv_sec; 1789 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1790 p->p_stats->p_cru.ru_stime.tv_usec; 1791 } 1792 #ifdef MULTIPROCESSOR 1793 if (p->p_cpu != NULL) 1794 ki->p_cpuid = p->p_cpu->ci_cpuid; 1795 else 1796 #endif 1797 ki->p_cpuid = KI_NOCPU; 1798 } 1799 1800 int 1801 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1802 struct proc *up) 1803 { 1804 struct ps_strings pss; 1805 struct proc *p; 1806 size_t len, upper_bound, xlen, i; 1807 struct uio auio; 1808 struct iovec aiov; 1809 vaddr_t argv; 1810 pid_t pid; 1811 int nargv, type, error; 1812 char *arg; 1813 char *tmp; 1814 1815 if (namelen != 2) 1816 return (EINVAL); 1817 pid = name[0]; 1818 type = name[1]; 1819 1820 switch (type) { 1821 case KERN_PROC_ARGV: 1822 case KERN_PROC_NARGV: 1823 case KERN_PROC_ENV: 1824 case KERN_PROC_NENV: 1825 /* ok */ 1826 break; 1827 default: 1828 return (EINVAL); 1829 } 1830 1831 /* check pid */ 1832 if ((p = pfind(pid)) == NULL) 1833 return (EINVAL); 1834 1835 /* only root or same user change look at the environment */ 1836 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1837 if (up->p_ucred->cr_uid != 0) { 1838 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1839 up->p_cred->p_ruid != p->p_cred->p_svuid) 1840 return (EPERM); 1841 } 1842 } 1843 1844 if (sizep != NULL && where == NULL) { 1845 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1846 *sizep = sizeof (int); 1847 else 1848 *sizep = ARG_MAX; /* XXX XXX XXX */ 1849 return (0); 1850 } 1851 if (where == NULL || sizep == NULL) 1852 return (EINVAL); 1853 1854 /* 1855 * Zombies don't have a stack, so we can't read their psstrings. 1856 * System processes also don't have a user stack. 1857 */ 1858 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1859 return (EINVAL); 1860 1861 /* 1862 * Lock the process down in memory. 1863 */ 1864 /* XXXCDC: how should locking work here? */ 1865 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1866 return (EFAULT); 1867 p->p_vmspace->vm_refcnt++; /* XXX */ 1868 1869 /* 1870 * Allocate a temporary buffer to hold the arguments. 1871 */ 1872 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1873 1874 /* 1875 * Read in the ps_strings structure. 1876 */ 1877 aiov.iov_base = &pss; 1878 aiov.iov_len = sizeof(pss); 1879 auio.uio_iov = &aiov; 1880 auio.uio_iovcnt = 1; 1881 auio.uio_offset = (vaddr_t)p->p_psstr; 1882 auio.uio_resid = sizeof(pss); 1883 auio.uio_segflg = UIO_SYSSPACE; 1884 auio.uio_rw = UIO_READ; 1885 auio.uio_procp = NULL; 1886 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1887 if (error) 1888 goto done; 1889 1890 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1891 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1892 else 1893 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1894 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1895 error = copyout(&nargv, where, sizeof(nargv)); 1896 *sizep = sizeof(nargv); 1897 goto done; 1898 } 1899 /* 1900 * Now read the address of the argument vector. 1901 */ 1902 switch (type) { 1903 case KERN_PROC_ARGV: 1904 /* XXX compat32 stuff here */ 1905 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1906 break; 1907 case KERN_PROC_ENV: 1908 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1909 break; 1910 default: 1911 return (EINVAL); 1912 } 1913 auio.uio_offset = (off_t)(long)tmp; 1914 aiov.iov_base = &argv; 1915 aiov.iov_len = sizeof(argv); 1916 auio.uio_iov = &aiov; 1917 auio.uio_iovcnt = 1; 1918 auio.uio_resid = sizeof(argv); 1919 auio.uio_segflg = UIO_SYSSPACE; 1920 auio.uio_rw = UIO_READ; 1921 auio.uio_procp = NULL; 1922 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1923 if (error) 1924 goto done; 1925 1926 /* 1927 * Now copy in the actual argument vector, one page at a time, 1928 * since we don't know how long the vector is (though, we do 1929 * know how many NUL-terminated strings are in the vector). 1930 */ 1931 len = 0; 1932 upper_bound = *sizep; 1933 for (; nargv != 0 && len < upper_bound; len += xlen) { 1934 aiov.iov_base = arg; 1935 aiov.iov_len = PAGE_SIZE; 1936 auio.uio_iov = &aiov; 1937 auio.uio_iovcnt = 1; 1938 auio.uio_offset = argv + len; 1939 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1940 auio.uio_resid = xlen; 1941 auio.uio_segflg = UIO_SYSSPACE; 1942 auio.uio_rw = UIO_READ; 1943 auio.uio_procp = NULL; 1944 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1945 if (error) 1946 goto done; 1947 1948 for (i = 0; i < xlen && nargv != 0; i++) { 1949 if (arg[i] == '\0') 1950 nargv--; /* one full string */ 1951 } 1952 1953 /* 1954 * Make sure we don't copyout past the end of the user's 1955 * buffer. 1956 */ 1957 if (len + i > upper_bound) 1958 i = upper_bound - len; 1959 1960 error = copyout(arg, (char *)where + len, i); 1961 if (error) 1962 break; 1963 1964 if (nargv == 0) { 1965 len += i; 1966 break; 1967 } 1968 } 1969 *sizep = len; 1970 1971 done: 1972 uvmspace_free(p->p_vmspace); 1973 1974 free(arg, M_TEMP); 1975 return (error); 1976 } 1977 1978 #if NPTY > 0 1979 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1980 1981 /* 1982 * Validate parameters and get old / set new parameters 1983 * for pty sysctl function. 1984 */ 1985 static int 1986 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 1987 { 1988 int error = 0; 1989 int oldmax = 0, newmax = 0; 1990 1991 /* get current value of maxptys */ 1992 oldmax = pty_maxptys(0, 0); 1993 1994 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1995 1996 if (!error && newp) { 1997 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1998 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1999 2000 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2001 return (EINVAL); 2002 2003 } 2004 2005 return (error); 2006 } 2007 #endif /* NPTY > 0 */ 2008 2009 static int 2010 sysctl_dotkstat(name, namelen, where, sizep, newp) 2011 int *name; 2012 u_int namelen; 2013 void *where; 2014 size_t *sizep; 2015 void *newp; 2016 { 2017 /* all sysctl names at this level are terminal */ 2018 if (namelen != 1) 2019 return (ENOTDIR); /* overloaded */ 2020 2021 switch (name[0]) { 2022 case KERN_TKSTAT_NIN: 2023 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2024 case KERN_TKSTAT_NOUT: 2025 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2026 case KERN_TKSTAT_CANCC: 2027 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2028 case KERN_TKSTAT_RAWCC: 2029 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2030 default: 2031 return (EOPNOTSUPP); 2032 } 2033 } 2034
Indexes created Wed Sep 24 05:09:52 GMT 2025