kern_sysctl.c revision 1.122
1 /* $NetBSD: kern_sysctl.c,v 1.122 2002/12/16 18:15:18 jdolecek 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 1.122 2002/12/16 18:15:18 jdolecek 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 extern int forkfsleep; 280 281 #ifndef MULTIPROCESSOR 282 #define sysctl_ncpus() 1 283 #endif 284 285 #ifdef MULTIPROCESSOR 286 287 #ifndef CPU_INFO_FOREACH 288 #define CPU_INFO_ITERATOR int 289 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 290 #endif 291 292 static int 293 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 294 { 295 u_int64_t cp_time[CPUSTATES]; 296 int i; 297 struct cpu_info *ci; 298 CPU_INFO_ITERATOR cii; 299 300 for (i = 0; i < CPUSTATES; i++) 301 cp_time[i] = 0; 302 303 for (CPU_INFO_FOREACH(cii, ci)) { 304 for (i = 0; i < CPUSTATES; i++) 305 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 306 } 307 return (sysctl_rdstruct(oldp, oldlenp, newp, 308 cp_time, sizeof(cp_time))); 309 } 310 311 static int 312 sysctl_ncpus(void) 313 { 314 struct cpu_info *ci; 315 CPU_INFO_ITERATOR cii; 316 317 int ncpus = 0; 318 for (CPU_INFO_FOREACH(cii, ci)) 319 ncpus++; 320 return ncpus; 321 } 322 323 #endif 324 325 /* 326 * kernel related system variables. 327 */ 328 int 329 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 330 void *newp, size_t newlen, struct proc *p) 331 { 332 int error, level, inthostid; 333 int old_autonicetime; 334 int old_vnodes; 335 dev_t consdev; 336 #if NRND > 0 337 int v; 338 #endif 339 340 /* All sysctl names at this level, except for a few, are terminal. */ 341 switch (name[0]) { 342 case KERN_PROC: 343 case KERN_PROC2: 344 case KERN_PROF: 345 case KERN_MBUF: 346 case KERN_PROC_ARGS: 347 case KERN_SYSVIPC_INFO: 348 case KERN_PIPE: 349 case KERN_TKSTAT: 350 /* Not terminal. */ 351 break; 352 default: 353 if (namelen != 1) 354 return (ENOTDIR); /* overloaded */ 355 } 356 357 switch (name[0]) { 358 case KERN_OSTYPE: 359 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 360 case KERN_OSRELEASE: 361 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 362 case KERN_OSREV: 363 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 364 case KERN_VERSION: 365 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 366 case KERN_MAXVNODES: 367 old_vnodes = desiredvnodes; 368 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 369 if (newp && !error) { 370 if (old_vnodes > desiredvnodes) { 371 desiredvnodes = old_vnodes; 372 return (EINVAL); 373 } 374 vfs_reinit(); 375 nchreinit(); 376 } 377 return (error); 378 case KERN_MAXPROC: 379 { 380 int nmaxproc = maxproc; 381 382 error = (sysctl_int(oldp, oldlenp, newp, newlen, &nmaxproc)); 383 384 if (!error && newp) { 385 if (nmaxproc < 0 || nmaxproc >= PID_MAX - PID_SKIP) 386 return (EINVAL); 387 388 #ifdef __HAVE_CPU_MAXPROC 389 if (nmaxproc > cpu_maxproc()) 390 return (EINVAL); 391 #endif 392 maxproc = nmaxproc; 393 } 394 395 return (error); 396 } 397 case KERN_MAXFILES: 398 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 399 case KERN_ARGMAX: 400 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 401 case KERN_SECURELVL: 402 level = securelevel; 403 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 404 newp == NULL) 405 return (error); 406 if (level < securelevel && p->p_pid != 1) 407 return (EPERM); 408 securelevel = level; 409 return (0); 410 case KERN_HOSTNAME: 411 error = sysctl_string(oldp, oldlenp, newp, newlen, 412 hostname, sizeof(hostname)); 413 if (newp && !error) 414 hostnamelen = newlen; 415 return (error); 416 case KERN_DOMAINNAME: 417 error = sysctl_string(oldp, oldlenp, newp, newlen, 418 domainname, sizeof(domainname)); 419 if (newp && !error) 420 domainnamelen = newlen; 421 return (error); 422 case KERN_HOSTID: 423 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 424 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 425 if (newp && !error) 426 hostid = inthostid; 427 return (error); 428 case KERN_CLOCKRATE: 429 return (sysctl_clockrate(oldp, oldlenp)); 430 case KERN_BOOTTIME: 431 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 432 sizeof(struct timeval))); 433 case KERN_VNODE: 434 return (sysctl_vnode(oldp, oldlenp, p)); 435 case KERN_PROC: 436 case KERN_PROC2: 437 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 438 case KERN_PROC_ARGS: 439 return (sysctl_procargs(name + 1, namelen - 1, 440 oldp, oldlenp, p)); 441 case KERN_FILE: 442 return (sysctl_file(oldp, oldlenp)); 443 #ifdef GPROF 444 case KERN_PROF: 445 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 446 newp, newlen)); 447 #endif 448 case KERN_POSIX1: 449 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 450 case KERN_NGROUPS: 451 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 452 case KERN_JOB_CONTROL: 453 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 454 case KERN_SAVED_IDS: 455 #ifdef _POSIX_SAVED_IDS 456 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 457 #else 458 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 459 #endif 460 case KERN_MAXPARTITIONS: 461 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 462 case KERN_RAWPARTITION: 463 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 464 #ifdef NTP 465 case KERN_NTPTIME: 466 return (sysctl_ntptime(oldp, oldlenp)); 467 #endif 468 case KERN_AUTONICETIME: 469 old_autonicetime = autonicetime; 470 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 471 if (autonicetime < 0) 472 autonicetime = old_autonicetime; 473 return (error); 474 case KERN_AUTONICEVAL: 475 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 476 if (autoniceval < PRIO_MIN) 477 autoniceval = PRIO_MIN; 478 if (autoniceval > PRIO_MAX) 479 autoniceval = PRIO_MAX; 480 return (error); 481 case KERN_RTC_OFFSET: 482 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 483 case KERN_ROOT_DEVICE: 484 return (sysctl_rdstring(oldp, oldlenp, newp, 485 root_device->dv_xname)); 486 case KERN_MSGBUFSIZE: 487 /* 488 * deal with cases where the message buffer has 489 * become corrupted. 490 */ 491 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 492 msgbufenabled = 0; 493 return (ENXIO); 494 } 495 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 496 case KERN_FSYNC: 497 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 498 case KERN_SYSVMSG: 499 #ifdef SYSVMSG 500 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 501 #else 502 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 503 #endif 504 case KERN_SYSVSEM: 505 #ifdef SYSVSEM 506 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 507 #else 508 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 509 #endif 510 case KERN_SYSVSHM: 511 #ifdef SYSVSHM 512 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 513 #else 514 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 515 #endif 516 case KERN_DEFCORENAME: 517 if (newp && newlen < 1) 518 return (EINVAL); 519 error = sysctl_string(oldp, oldlenp, newp, newlen, 520 defcorename, sizeof(defcorename)); 521 if (newp && !error) 522 defcorenamelen = newlen; 523 return (error); 524 case KERN_SYNCHRONIZED_IO: 525 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 526 case KERN_IOV_MAX: 527 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 528 case KERN_MBUF: 529 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 530 newp, newlen)); 531 case KERN_MAPPED_FILES: 532 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 533 case KERN_MEMLOCK: 534 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 535 case KERN_MEMLOCK_RANGE: 536 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 537 case KERN_MEMORY_PROTECTION: 538 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 539 case KERN_LOGIN_NAME_MAX: 540 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 541 case KERN_LOGSIGEXIT: 542 return (sysctl_int(oldp, oldlenp, newp, newlen, 543 &kern_logsigexit)); 544 case KERN_FSCALE: 545 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 546 case KERN_CCPU: 547 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 548 case KERN_CP_TIME: 549 #ifndef MULTIPROCESSOR 550 return (sysctl_rdstruct(oldp, oldlenp, newp, 551 curcpu()->ci_schedstate.spc_cp_time, 552 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 553 #else 554 return (sysctl_docptime(oldp, oldlenp, newp)); 555 #endif 556 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 557 case KERN_SYSVIPC_INFO: 558 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 559 #endif 560 case KERN_MSGBUF: 561 return (sysctl_msgbuf(oldp, oldlenp)); 562 case KERN_CONSDEV: 563 if (cn_tab != NULL) 564 consdev = cn_tab->cn_dev; 565 else 566 consdev = NODEV; 567 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 568 sizeof consdev)); 569 #if NPTY > 0 570 case KERN_MAXPTYS: 571 return sysctl_pty(oldp, oldlenp, newp, newlen); 572 #endif 573 #ifndef PIPE_SOCKETPAIR 574 case KERN_PIPE: 575 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 576 newp, newlen)); 577 #endif 578 case KERN_MAXPHYS: 579 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 580 case KERN_SBMAX: 581 { 582 int new_sbmax = sb_max; 583 584 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 585 if (newp && !error) { 586 if (new_sbmax < (16 * 1024)) /* sanity */ 587 return (EINVAL); 588 sb_max = new_sbmax; 589 } 590 return (error); 591 } 592 case KERN_TKSTAT: 593 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 594 newp)); 595 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 596 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 597 case KERN_URND: 598 #if NRND > 0 599 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 600 sizeof(v)) 601 return (sysctl_rdint(oldp, oldlenp, newp, v)); 602 else 603 return (EIO); /*XXX*/ 604 #else 605 return (EOPNOTSUPP); 606 #endif 607 case KERN_LABELSECTOR: 608 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 609 case KERN_LABELOFFSET: 610 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 611 case KERN_FORKFSLEEP: 612 { 613 /* userland sees value in ms, internally is in ticks */ 614 int timo, lsleep = forkfsleep * 1000 / hz; 615 616 error = (sysctl_int(oldp, oldlenp, newp, newlen, &lsleep)); 617 if (newp && !error) { 618 /* refuse negative values, and overly 'long time' */ 619 if (lsleep < 0 || lsleep > MAXSLP * 1000) 620 return (EINVAL); 621 622 timo = mstohz(lsleep); 623 624 /* if the interval is >0 ms && <1 tick, use 1 tick */ 625 if (lsleep != 0 && timo == 0) 626 forkfsleep = 1; 627 else 628 forkfsleep = timo; 629 } 630 return (error); 631 } 632 633 default: 634 return (EOPNOTSUPP); 635 } 636 /* NOTREACHED */ 637 } 638 639 /* 640 * hardware related system variables. 641 */ 642 int 643 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 644 void *newp, size_t newlen, struct proc *p) 645 { 646 647 /* All sysctl names at this level, except for a few, are terminal. */ 648 switch (name[0]) { 649 case HW_DISKSTATS: 650 /* Not terminal. */ 651 break; 652 default: 653 if (namelen != 1) 654 return (ENOTDIR); /* overloaded */ 655 } 656 657 switch (name[0]) { 658 case HW_MACHINE: 659 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 660 case HW_MACHINE_ARCH: 661 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 662 case HW_MODEL: 663 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 664 case HW_NCPU: 665 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 666 case HW_BYTEORDER: 667 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 668 case HW_PHYSMEM: 669 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 670 case HW_USERMEM: 671 return (sysctl_rdint(oldp, oldlenp, newp, 672 ctob(physmem - uvmexp.wired))); 673 case HW_PAGESIZE: 674 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 675 case HW_ALIGNBYTES: 676 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 677 case HW_DISKNAMES: 678 return (sysctl_disknames(oldp, oldlenp)); 679 case HW_DISKSTATS: 680 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 681 case HW_CNMAGIC: { 682 char magic[CNS_LEN]; 683 int error; 684 685 if (oldp) 686 cn_get_magic(magic, CNS_LEN); 687 error = sysctl_string(oldp, oldlenp, newp, newlen, 688 magic, sizeof(magic)); 689 if (newp && !error) { 690 error = cn_set_magic(magic); 691 } 692 return (error); 693 } 694 default: 695 return (EOPNOTSUPP); 696 } 697 /* NOTREACHED */ 698 } 699 700 #ifdef DEBUG 701 /* 702 * Debugging related system variables. 703 */ 704 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 705 struct ctldebug debug5, debug6, debug7, debug8, debug9; 706 struct ctldebug debug10, debug11, debug12, debug13, debug14; 707 struct ctldebug debug15, debug16, debug17, debug18, debug19; 708 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 709 &debug0, &debug1, &debug2, &debug3, &debug4, 710 &debug5, &debug6, &debug7, &debug8, &debug9, 711 &debug10, &debug11, &debug12, &debug13, &debug14, 712 &debug15, &debug16, &debug17, &debug18, &debug19, 713 }; 714 715 int 716 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 717 void *newp, size_t newlen, struct proc *p) 718 { 719 struct ctldebug *cdp; 720 721 /* all sysctl names at this level are name and field */ 722 if (namelen != 2) 723 return (ENOTDIR); /* overloaded */ 724 if (name[0] >= CTL_DEBUG_MAXID) 725 return (EOPNOTSUPP); 726 cdp = debugvars[name[0]]; 727 if (cdp->debugname == 0) 728 return (EOPNOTSUPP); 729 switch (name[1]) { 730 case CTL_DEBUG_NAME: 731 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 732 case CTL_DEBUG_VALUE: 733 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 734 default: 735 return (EOPNOTSUPP); 736 } 737 /* NOTREACHED */ 738 } 739 #endif /* DEBUG */ 740 741 int 742 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 743 void *newp, size_t newlen, struct proc *p) 744 { 745 struct proc *ptmp = NULL; 746 const struct proclist_desc *pd; 747 int error = 0; 748 struct rlimit alim; 749 struct plimit *newplim; 750 char *tmps = NULL; 751 size_t len, curlen; 752 u_int i; 753 754 if (namelen < 2) 755 return EINVAL; 756 757 if (name[0] == PROC_CURPROC) { 758 ptmp = p; 759 } else { 760 proclist_lock_read(); 761 for (pd = proclists; pd->pd_list != NULL; pd++) { 762 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 763 ptmp = LIST_NEXT(ptmp, p_list)) { 764 /* Skip embryonic processes. */ 765 if (ptmp->p_stat == SIDL) 766 continue; 767 if (ptmp->p_pid == (pid_t)name[0]) 768 break; 769 } 770 if (ptmp != NULL) 771 break; 772 } 773 proclist_unlock_read(); 774 if (ptmp == NULL) 775 return(ESRCH); 776 if (p->p_ucred->cr_uid != 0) { 777 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 778 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 779 return EPERM; 780 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 781 return EPERM; /* sgid proc */ 782 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 783 if (p->p_ucred->cr_groups[i] == 784 ptmp->p_cred->p_rgid) 785 break; 786 } 787 if (i == p->p_ucred->cr_ngroups) 788 return EPERM; 789 } 790 } 791 switch(name[1]) { 792 case PROC_PID_STOPFORK: 793 if (namelen != 2) 794 return EINVAL; 795 i = ((ptmp->p_flag & P_STOPFORK) != 0); 796 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 797 return error; 798 if (i != 0) 799 ptmp->p_flag |= P_STOPFORK; 800 else 801 ptmp->p_flag &= ~P_STOPFORK; 802 return 0; 803 break; 804 805 case PROC_PID_STOPEXEC: 806 if (namelen != 2) 807 return EINVAL; 808 i = ((ptmp->p_flag & P_STOPEXEC) != 0); 809 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 810 return error; 811 if (i != 0) 812 ptmp->p_flag |= P_STOPEXEC; 813 else 814 ptmp->p_flag &= ~P_STOPEXEC; 815 return 0; 816 break; 817 818 case PROC_PID_CORENAME: 819 if (namelen != 2) 820 return EINVAL; 821 /* 822 * Can't use sysctl_string() here because we may malloc a new 823 * area during the process, so we have to do it by hand. 824 */ 825 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 826 if (oldlenp && *oldlenp < curlen) { 827 if (!oldp) 828 *oldlenp = curlen; 829 return (ENOMEM); 830 } 831 if (newp) { 832 if (securelevel > 2) 833 return EPERM; 834 if (newlen > MAXPATHLEN) 835 return ENAMETOOLONG; 836 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 837 if (tmps == NULL) 838 return ENOMEM; 839 error = copyin(newp, tmps, newlen + 1); 840 tmps[newlen] = '\0'; 841 if (error) 842 goto cleanup; 843 /* Enforce to be either 'core' for end with '.core' */ 844 if (newlen < 4) { /* c.o.r.e */ 845 error = EINVAL; 846 goto cleanup; 847 } 848 len = newlen - 4; 849 if (len > 0) { 850 if (tmps[len - 1] != '.' && 851 tmps[len - 1] != '/') { 852 error = EINVAL; 853 goto cleanup; 854 } 855 } 856 if (strcmp(&tmps[len], "core") != 0) { 857 error = EINVAL; 858 goto cleanup; 859 } 860 } 861 if (oldp && oldlenp) { 862 *oldlenp = curlen; 863 error = copyout(ptmp->p_limit->pl_corename, oldp, 864 curlen); 865 } 866 if (newp && error == 0) { 867 /* if the 2 strings are identical, don't limcopy() */ 868 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 869 error = 0; 870 goto cleanup; 871 } 872 if (ptmp->p_limit->p_refcnt > 1 && 873 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 874 newplim = limcopy(ptmp->p_limit); 875 limfree(ptmp->p_limit); 876 ptmp->p_limit = newplim; 877 } 878 if (ptmp->p_limit->pl_corename != defcorename) { 879 free(ptmp->p_limit->pl_corename, M_TEMP); 880 } 881 ptmp->p_limit->pl_corename = tmps; 882 return (0); 883 } 884 cleanup: 885 if (tmps) 886 free(tmps, M_TEMP); 887 return (error); 888 break; 889 890 case PROC_PID_LIMIT: 891 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 892 return EINVAL; 893 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 894 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 895 error = sysctl_quad(oldp, oldlenp, newp, newlen, 896 &alim.rlim_max); 897 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 898 error = sysctl_quad(oldp, oldlenp, newp, newlen, 899 &alim.rlim_cur); 900 else 901 error = EINVAL; 902 903 if (error) 904 return error; 905 906 if (newp) 907 error = dosetrlimit(ptmp, p->p_cred, 908 name[2] - 1, &alim); 909 return error; 910 break; 911 912 default: 913 return (EINVAL); 914 break; 915 } 916 /* NOTREACHED */ 917 return (EINVAL); 918 } 919 920 int 921 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 922 void *newp, size_t newlen, struct proc *p) 923 { 924 static struct { 925 const char *name; 926 int type; 927 } emulations[] = CTL_EMUL_NAMES; 928 const struct emul *e; 929 const char *ename; 930 #ifdef LKM 931 extern struct lock exec_lock; /* XXX */ 932 int error; 933 #else 934 extern int nexecs_builtin; 935 extern const struct execsw execsw_builtin[]; 936 int i; 937 #endif 938 939 /* all sysctl names at this level are name and field */ 940 if (namelen < 2) 941 return (ENOTDIR); /* overloaded */ 942 943 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 944 return (EOPNOTSUPP); 945 946 ename = emulations[name[0]].name; 947 948 #ifdef LKM 949 lockmgr(&exec_lock, LK_SHARED, NULL); 950 if ((e = emul_search(ename))) { 951 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 952 newp, newlen, p); 953 } else 954 error = EOPNOTSUPP; 955 lockmgr(&exec_lock, LK_RELEASE, NULL); 956 957 return (error); 958 #else 959 for (i = 0; i < nexecs_builtin; i++) { 960 e = execsw_builtin[i].es_emul; 961 /* 962 * In order to match e.g. e->e_name "irix o32" with ename "irix", 963 * we limit the comparison to the length of ename. 964 */ 965 if (e == NULL || strncmp(ename, e->e_name, strlen(ename)) != 0 || 966 e->e_sysctl == NULL) 967 continue; 968 969 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 970 newp, newlen, p); 971 } 972 973 return (EOPNOTSUPP); 974 #endif 975 } 976 /* 977 * Convenience macros. 978 */ 979 980 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 981 if (oldlenp) { \ 982 if (!oldp) \ 983 *oldlenp = len; \ 984 else { \ 985 if (*oldlenp < len) \ 986 return(ENOMEM); \ 987 *oldlenp = len; \ 988 error = copyout((caddr_t)valp, oldp, len); \ 989 } \ 990 } 991 992 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 993 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 994 995 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 996 if (newp && newlen != len) \ 997 return (EINVAL); 998 999 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1000 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1001 1002 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1003 if (error == 0 && newp) \ 1004 error = copyin(newp, valp, len); 1005 1006 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1007 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1008 1009 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1010 if (oldlenp) { \ 1011 len = strlen(str) + 1; \ 1012 if (!oldp) \ 1013 *oldlenp = len; \ 1014 else { \ 1015 if (*oldlenp < len) { \ 1016 err2 = ENOMEM; \ 1017 len = *oldlenp; \ 1018 } else \ 1019 *oldlenp = len; \ 1020 error = copyout(str, oldp, len);\ 1021 if (error == 0) \ 1022 error = err2; \ 1023 } \ 1024 } 1025 1026 /* 1027 * Validate parameters and get old / set new parameters 1028 * for an integer-valued sysctl function. 1029 */ 1030 int 1031 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1032 { 1033 int error = 0; 1034 1035 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1036 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1037 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1038 1039 return (error); 1040 } 1041 1042 1043 /* 1044 * As above, but read-only. 1045 */ 1046 int 1047 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1048 { 1049 int error = 0; 1050 1051 if (newp) 1052 return (EPERM); 1053 1054 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1055 1056 return (error); 1057 } 1058 1059 /* 1060 * Validate parameters and get old / set new parameters 1061 * for an quad-valued sysctl function. 1062 */ 1063 int 1064 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1065 quad_t *valp) 1066 { 1067 int error = 0; 1068 1069 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1070 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1071 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1072 1073 return (error); 1074 } 1075 1076 /* 1077 * As above, but read-only. 1078 */ 1079 int 1080 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1081 { 1082 int error = 0; 1083 1084 if (newp) 1085 return (EPERM); 1086 1087 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1088 1089 return (error); 1090 } 1091 1092 /* 1093 * Validate parameters and get old / set new parameters 1094 * for a string-valued sysctl function. 1095 */ 1096 int 1097 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1098 size_t maxlen) 1099 { 1100 int error = 0, err2 = 0; 1101 size_t len; 1102 1103 if (newp && newlen >= maxlen) 1104 return (EINVAL); 1105 1106 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1107 1108 if (error == 0 && newp) { 1109 error = copyin(newp, str, newlen); 1110 str[newlen] = 0; 1111 } 1112 return (error); 1113 } 1114 1115 /* 1116 * As above, but read-only. 1117 */ 1118 int 1119 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1120 { 1121 int error = 0, err2 = 0; 1122 size_t len; 1123 1124 if (newp) 1125 return (EPERM); 1126 1127 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1128 1129 return (error); 1130 } 1131 1132 /* 1133 * Validate parameters and get old / set new parameters 1134 * for a structure oriented sysctl function. 1135 */ 1136 int 1137 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1138 size_t len) 1139 { 1140 int error = 0; 1141 1142 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1143 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1144 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1145 1146 return (error); 1147 } 1148 1149 /* 1150 * Validate parameters and get old parameters 1151 * for a structure oriented sysctl function. 1152 */ 1153 int 1154 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1155 size_t len) 1156 { 1157 int error = 0; 1158 1159 if (newp) 1160 return (EPERM); 1161 1162 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1163 1164 return (error); 1165 } 1166 1167 /* 1168 * As above, but can return a truncated result. 1169 */ 1170 int 1171 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1172 size_t len) 1173 { 1174 int error = 0; 1175 1176 if (newp) 1177 return (EPERM); 1178 1179 len = min(*oldlenp, len); 1180 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1181 1182 return (error); 1183 } 1184 1185 /* 1186 * Get file structures. 1187 */ 1188 static int 1189 sysctl_file(void *vwhere, size_t *sizep) 1190 { 1191 int error; 1192 size_t buflen; 1193 struct file *fp; 1194 char *start, *where; 1195 1196 start = where = vwhere; 1197 buflen = *sizep; 1198 if (where == NULL) { 1199 /* 1200 * overestimate by 10 files 1201 */ 1202 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1203 return (0); 1204 } 1205 1206 /* 1207 * first copyout filehead 1208 */ 1209 if (buflen < sizeof(filehead)) { 1210 *sizep = 0; 1211 return (0); 1212 } 1213 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1214 if (error) 1215 return (error); 1216 buflen -= sizeof(filehead); 1217 where += sizeof(filehead); 1218 1219 /* 1220 * followed by an array of file structures 1221 */ 1222 LIST_FOREACH(fp, &filehead, f_list) { 1223 if (buflen < sizeof(struct file)) { 1224 *sizep = where - start; 1225 return (ENOMEM); 1226 } 1227 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1228 if (error) 1229 return (error); 1230 buflen -= sizeof(struct file); 1231 where += sizeof(struct file); 1232 } 1233 *sizep = where - start; 1234 return (0); 1235 } 1236 1237 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1238 #define FILL_PERM(src, dst) do { \ 1239 (dst)._key = (src)._key; \ 1240 (dst).uid = (src).uid; \ 1241 (dst).gid = (src).gid; \ 1242 (dst).cuid = (src).cuid; \ 1243 (dst).cgid = (src).cgid; \ 1244 (dst).mode = (src).mode; \ 1245 (dst)._seq = (src)._seq; \ 1246 } while (/*CONSTCOND*/ 0); 1247 #define FILL_MSG(src, dst) do { \ 1248 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1249 (dst).msg_qnum = (src).msg_qnum; \ 1250 (dst).msg_qbytes = (src).msg_qbytes; \ 1251 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1252 (dst).msg_lspid = (src).msg_lspid; \ 1253 (dst).msg_lrpid = (src).msg_lrpid; \ 1254 (dst).msg_stime = (src).msg_stime; \ 1255 (dst).msg_rtime = (src).msg_rtime; \ 1256 (dst).msg_ctime = (src).msg_ctime; \ 1257 } while (/*CONSTCOND*/ 0) 1258 #define FILL_SEM(src, dst) do { \ 1259 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1260 (dst).sem_nsems = (src).sem_nsems; \ 1261 (dst).sem_otime = (src).sem_otime; \ 1262 (dst).sem_ctime = (src).sem_ctime; \ 1263 } while (/*CONSTCOND*/ 0) 1264 #define FILL_SHM(src, dst) do { \ 1265 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1266 (dst).shm_segsz = (src).shm_segsz; \ 1267 (dst).shm_lpid = (src).shm_lpid; \ 1268 (dst).shm_cpid = (src).shm_cpid; \ 1269 (dst).shm_atime = (src).shm_atime; \ 1270 (dst).shm_dtime = (src).shm_dtime; \ 1271 (dst).shm_ctime = (src).shm_ctime; \ 1272 (dst).shm_nattch = (src).shm_nattch; \ 1273 } while (/*CONSTCOND*/ 0) 1274 1275 static int 1276 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1277 { 1278 #ifdef SYSVMSG 1279 struct msg_sysctl_info *msgsi = NULL; 1280 #endif 1281 #ifdef SYSVSEM 1282 struct sem_sysctl_info *semsi = NULL; 1283 #endif 1284 #ifdef SYSVSHM 1285 struct shm_sysctl_info *shmsi = NULL; 1286 #endif 1287 size_t infosize, dssize, tsize, buflen; 1288 void *buf = NULL; 1289 char *start; 1290 int32_t nds; 1291 int i, error, ret; 1292 1293 if (namelen != 1) 1294 return (EINVAL); 1295 1296 start = where; 1297 buflen = *sizep; 1298 1299 switch (*name) { 1300 case KERN_SYSVIPC_MSG_INFO: 1301 #ifdef SYSVMSG 1302 infosize = sizeof(msgsi->msginfo); 1303 nds = msginfo.msgmni; 1304 dssize = sizeof(msgsi->msgids[0]); 1305 break; 1306 #else 1307 return (EINVAL); 1308 #endif 1309 case KERN_SYSVIPC_SEM_INFO: 1310 #ifdef SYSVSEM 1311 infosize = sizeof(semsi->seminfo); 1312 nds = seminfo.semmni; 1313 dssize = sizeof(semsi->semids[0]); 1314 break; 1315 #else 1316 return (EINVAL); 1317 #endif 1318 case KERN_SYSVIPC_SHM_INFO: 1319 #ifdef SYSVSHM 1320 infosize = sizeof(shmsi->shminfo); 1321 nds = shminfo.shmmni; 1322 dssize = sizeof(shmsi->shmids[0]); 1323 break; 1324 #else 1325 return (EINVAL); 1326 #endif 1327 default: 1328 return (EINVAL); 1329 } 1330 /* 1331 * Round infosize to 64 bit boundary if requesting more than just 1332 * the info structure or getting the total data size. 1333 */ 1334 if (where == NULL || *sizep > infosize) 1335 infosize = ((infosize + 7) / 8) * 8; 1336 tsize = infosize + nds * dssize; 1337 1338 /* Return just the total size required. */ 1339 if (where == NULL) { 1340 *sizep = tsize; 1341 return (0); 1342 } 1343 1344 /* Not enough room for even the info struct. */ 1345 if (buflen < infosize) { 1346 *sizep = 0; 1347 return (ENOMEM); 1348 } 1349 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1350 memset(buf, 0, min(tsize, buflen)); 1351 1352 switch (*name) { 1353 #ifdef SYSVMSG 1354 case KERN_SYSVIPC_MSG_INFO: 1355 msgsi = (struct msg_sysctl_info *)buf; 1356 msgsi->msginfo = msginfo; 1357 break; 1358 #endif 1359 #ifdef SYSVSEM 1360 case KERN_SYSVIPC_SEM_INFO: 1361 semsi = (struct sem_sysctl_info *)buf; 1362 semsi->seminfo = seminfo; 1363 break; 1364 #endif 1365 #ifdef SYSVSHM 1366 case KERN_SYSVIPC_SHM_INFO: 1367 shmsi = (struct shm_sysctl_info *)buf; 1368 shmsi->shminfo = shminfo; 1369 break; 1370 #endif 1371 } 1372 buflen -= infosize; 1373 1374 ret = 0; 1375 if (buflen > 0) { 1376 /* Fill in the IPC data structures. */ 1377 for (i = 0; i < nds; i++) { 1378 if (buflen < dssize) { 1379 ret = ENOMEM; 1380 break; 1381 } 1382 switch (*name) { 1383 #ifdef SYSVMSG 1384 case KERN_SYSVIPC_MSG_INFO: 1385 FILL_MSG(msqids[i], msgsi->msgids[i]); 1386 break; 1387 #endif 1388 #ifdef SYSVSEM 1389 case KERN_SYSVIPC_SEM_INFO: 1390 FILL_SEM(sema[i], semsi->semids[i]); 1391 break; 1392 #endif 1393 #ifdef SYSVSHM 1394 case KERN_SYSVIPC_SHM_INFO: 1395 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1396 break; 1397 #endif 1398 } 1399 buflen -= dssize; 1400 } 1401 } 1402 *sizep -= buflen; 1403 error = copyout(buf, start, *sizep); 1404 /* If copyout succeeded, use return code set earlier. */ 1405 if (error == 0) 1406 error = ret; 1407 if (buf) 1408 free(buf, M_TEMP); 1409 return (error); 1410 } 1411 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1412 1413 static int 1414 sysctl_msgbuf(void *vwhere, size_t *sizep) 1415 { 1416 char *where = vwhere; 1417 size_t len, maxlen = *sizep; 1418 long beg, end; 1419 int error; 1420 1421 /* 1422 * deal with cases where the message buffer has 1423 * become corrupted. 1424 */ 1425 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1426 msgbufenabled = 0; 1427 return (ENXIO); 1428 } 1429 1430 if (where == NULL) { 1431 /* always return full buffer size */ 1432 *sizep = msgbufp->msg_bufs; 1433 return (0); 1434 } 1435 1436 error = 0; 1437 maxlen = min(msgbufp->msg_bufs, maxlen); 1438 1439 /* 1440 * First, copy from the write pointer to the end of 1441 * message buffer. 1442 */ 1443 beg = msgbufp->msg_bufx; 1444 end = msgbufp->msg_bufs; 1445 while (maxlen > 0) { 1446 len = min(end - beg, maxlen); 1447 if (len == 0) 1448 break; 1449 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1450 if (error) 1451 break; 1452 where += len; 1453 maxlen -= len; 1454 1455 /* 1456 * ... then, copy from the beginning of message buffer to 1457 * the write pointer. 1458 */ 1459 beg = 0; 1460 end = msgbufp->msg_bufx; 1461 } 1462 return (error); 1463 } 1464 1465 /* 1466 * try over estimating by 5 procs 1467 */ 1468 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1469 1470 static int 1471 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1472 { 1473 struct eproc eproc; 1474 struct kinfo_proc2 kproc2; 1475 struct kinfo_proc *dp; 1476 struct proc *p; 1477 const struct proclist_desc *pd; 1478 char *where, *dp2; 1479 int type, op, arg; 1480 u_int elem_size, elem_count; 1481 size_t buflen, needed; 1482 int error; 1483 1484 dp = vwhere; 1485 dp2 = where = vwhere; 1486 buflen = where != NULL ? *sizep : 0; 1487 error = 0; 1488 needed = 0; 1489 type = name[0]; 1490 1491 if (type == KERN_PROC) { 1492 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1493 return (EINVAL); 1494 op = name[1]; 1495 if (op != KERN_PROC_ALL) 1496 arg = name[2]; 1497 else 1498 arg = 0; /* Quell compiler warning */ 1499 elem_size = elem_count = 0; /* Ditto */ 1500 } else { 1501 if (namelen != 5) 1502 return (EINVAL); 1503 op = name[1]; 1504 arg = name[2]; 1505 elem_size = name[3]; 1506 elem_count = name[4]; 1507 } 1508 1509 proclist_lock_read(); 1510 1511 pd = proclists; 1512 again: 1513 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1514 /* 1515 * Skip embryonic processes. 1516 */ 1517 if (p->p_stat == SIDL) 1518 continue; 1519 /* 1520 * TODO - make more efficient (see notes below). 1521 * do by session. 1522 */ 1523 switch (op) { 1524 1525 case KERN_PROC_PID: 1526 /* could do this with just a lookup */ 1527 if (p->p_pid != (pid_t)arg) 1528 continue; 1529 break; 1530 1531 case KERN_PROC_PGRP: 1532 /* could do this by traversing pgrp */ 1533 if (p->p_pgrp->pg_id != (pid_t)arg) 1534 continue; 1535 break; 1536 1537 case KERN_PROC_SESSION: 1538 if (p->p_session->s_sid != (pid_t)arg) 1539 continue; 1540 break; 1541 1542 case KERN_PROC_TTY: 1543 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1544 if ((p->p_flag & P_CONTROLT) == 0 || 1545 p->p_session->s_ttyp == NULL || 1546 p->p_session->s_ttyvp != NULL) 1547 continue; 1548 } else if ((p->p_flag & P_CONTROLT) == 0 || 1549 p->p_session->s_ttyp == NULL) { 1550 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1551 continue; 1552 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1553 continue; 1554 break; 1555 1556 case KERN_PROC_UID: 1557 if (p->p_ucred->cr_uid != (uid_t)arg) 1558 continue; 1559 break; 1560 1561 case KERN_PROC_RUID: 1562 if (p->p_cred->p_ruid != (uid_t)arg) 1563 continue; 1564 break; 1565 1566 case KERN_PROC_GID: 1567 if (p->p_ucred->cr_gid != (uid_t)arg) 1568 continue; 1569 break; 1570 1571 case KERN_PROC_RGID: 1572 if (p->p_cred->p_rgid != (uid_t)arg) 1573 continue; 1574 break; 1575 1576 case KERN_PROC_ALL: 1577 /* allow everything */ 1578 break; 1579 1580 default: 1581 error = EINVAL; 1582 goto cleanup; 1583 } 1584 if (type == KERN_PROC) { 1585 if (buflen >= sizeof(struct kinfo_proc)) { 1586 fill_eproc(p, &eproc); 1587 error = copyout((caddr_t)p, &dp->kp_proc, 1588 sizeof(struct proc)); 1589 if (error) 1590 goto cleanup; 1591 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1592 sizeof(eproc)); 1593 if (error) 1594 goto cleanup; 1595 dp++; 1596 buflen -= sizeof(struct kinfo_proc); 1597 } 1598 needed += sizeof(struct kinfo_proc); 1599 } else { /* KERN_PROC2 */ 1600 if (buflen >= elem_size && elem_count > 0) { 1601 fill_kproc2(p, &kproc2); 1602 /* 1603 * Copy out elem_size, but not larger than 1604 * the size of a struct kinfo_proc2. 1605 */ 1606 error = copyout(&kproc2, dp2, 1607 min(sizeof(kproc2), elem_size)); 1608 if (error) 1609 goto cleanup; 1610 dp2 += elem_size; 1611 buflen -= elem_size; 1612 elem_count--; 1613 } 1614 needed += elem_size; 1615 } 1616 } 1617 pd++; 1618 if (pd->pd_list != NULL) 1619 goto again; 1620 proclist_unlock_read(); 1621 1622 if (where != NULL) { 1623 if (type == KERN_PROC) 1624 *sizep = (caddr_t)dp - where; 1625 else 1626 *sizep = dp2 - where; 1627 if (needed > *sizep) 1628 return (ENOMEM); 1629 } else { 1630 needed += KERN_PROCSLOP; 1631 *sizep = needed; 1632 } 1633 return (0); 1634 cleanup: 1635 proclist_unlock_read(); 1636 return (error); 1637 } 1638 1639 /* 1640 * Fill in an eproc structure for the specified process. 1641 */ 1642 void 1643 fill_eproc(struct proc *p, struct eproc *ep) 1644 { 1645 struct tty *tp; 1646 1647 ep->e_paddr = p; 1648 ep->e_sess = p->p_session; 1649 ep->e_pcred = *p->p_cred; 1650 ep->e_ucred = *p->p_ucred; 1651 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1652 ep->e_vm.vm_rssize = 0; 1653 ep->e_vm.vm_tsize = 0; 1654 ep->e_vm.vm_dsize = 0; 1655 ep->e_vm.vm_ssize = 0; 1656 /* ep->e_vm.vm_pmap = XXX; */ 1657 } else { 1658 struct vmspace *vm = p->p_vmspace; 1659 1660 ep->e_vm.vm_rssize = vm_resident_count(vm); 1661 ep->e_vm.vm_tsize = vm->vm_tsize; 1662 ep->e_vm.vm_dsize = vm->vm_dsize; 1663 ep->e_vm.vm_ssize = vm->vm_ssize; 1664 } 1665 if (p->p_pptr) 1666 ep->e_ppid = p->p_pptr->p_pid; 1667 else 1668 ep->e_ppid = 0; 1669 ep->e_pgid = p->p_pgrp->pg_id; 1670 ep->e_sid = ep->e_sess->s_sid; 1671 ep->e_jobc = p->p_pgrp->pg_jobc; 1672 if ((p->p_flag & P_CONTROLT) && 1673 (tp = ep->e_sess->s_ttyp)) { 1674 ep->e_tdev = tp->t_dev; 1675 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1676 ep->e_tsess = tp->t_session; 1677 } else 1678 ep->e_tdev = NODEV; 1679 if (p->p_wmesg) 1680 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1681 ep->e_xsize = ep->e_xrssize = 0; 1682 ep->e_xccount = ep->e_xswrss = 0; 1683 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1684 if (SESS_LEADER(p)) 1685 ep->e_flag |= EPROC_SLEADER; 1686 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1687 } 1688 1689 /* 1690 * Fill in an eproc structure for the specified process. 1691 */ 1692 static void 1693 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1694 { 1695 struct tty *tp; 1696 1697 memset(ki, 0, sizeof(*ki)); 1698 1699 ki->p_forw = PTRTOINT64(p->p_forw); 1700 ki->p_back = PTRTOINT64(p->p_back); 1701 ki->p_paddr = PTRTOINT64(p); 1702 1703 ki->p_addr = PTRTOINT64(p->p_addr); 1704 ki->p_fd = PTRTOINT64(p->p_fd); 1705 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1706 ki->p_stats = PTRTOINT64(p->p_stats); 1707 ki->p_limit = PTRTOINT64(p->p_limit); 1708 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1709 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1710 ki->p_sess = PTRTOINT64(p->p_session); 1711 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1712 ki->p_ru = PTRTOINT64(p->p_ru); 1713 1714 ki->p_eflag = 0; 1715 ki->p_exitsig = p->p_exitsig; 1716 ki->p_flag = p->p_flag; 1717 1718 ki->p_pid = p->p_pid; 1719 if (p->p_pptr) 1720 ki->p_ppid = p->p_pptr->p_pid; 1721 else 1722 ki->p_ppid = 0; 1723 ki->p_sid = p->p_session->s_sid; 1724 ki->p__pgid = p->p_pgrp->pg_id; 1725 1726 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1727 1728 ki->p_uid = p->p_ucred->cr_uid; 1729 ki->p_ruid = p->p_cred->p_ruid; 1730 ki->p_gid = p->p_ucred->cr_gid; 1731 ki->p_rgid = p->p_cred->p_rgid; 1732 1733 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1734 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1735 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1736 1737 ki->p_jobc = p->p_pgrp->pg_jobc; 1738 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1739 ki->p_tdev = tp->t_dev; 1740 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1741 ki->p_tsess = PTRTOINT64(tp->t_session); 1742 } else { 1743 ki->p_tdev = NODEV; 1744 } 1745 1746 ki->p_estcpu = p->p_estcpu; 1747 ki->p_rtime_sec = p->p_rtime.tv_sec; 1748 ki->p_rtime_usec = p->p_rtime.tv_usec; 1749 ki->p_cpticks = p->p_cpticks; 1750 ki->p_pctcpu = p->p_pctcpu; 1751 ki->p_swtime = p->p_swtime; 1752 ki->p_slptime = p->p_slptime; 1753 if (p->p_stat == SONPROC) { 1754 KDASSERT(p->p_cpu != NULL); 1755 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1756 } else 1757 ki->p_schedflags = 0; 1758 1759 ki->p_uticks = p->p_uticks; 1760 ki->p_sticks = p->p_sticks; 1761 ki->p_iticks = p->p_iticks; 1762 1763 ki->p_tracep = PTRTOINT64(p->p_tracep); 1764 ki->p_traceflag = p->p_traceflag; 1765 1766 ki->p_holdcnt = p->p_holdcnt; 1767 1768 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1769 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1770 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1771 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1772 1773 ki->p_stat = p->p_stat; 1774 ki->p_priority = p->p_priority; 1775 ki->p_usrpri = p->p_usrpri; 1776 ki->p_nice = p->p_nice; 1777 1778 ki->p_xstat = p->p_xstat; 1779 ki->p_acflag = p->p_acflag; 1780 1781 strncpy(ki->p_comm, p->p_comm, 1782 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1783 1784 if (p->p_wmesg) 1785 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1786 ki->p_wchan = PTRTOINT64(p->p_wchan); 1787 1788 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1789 1790 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1791 ki->p_vm_rssize = 0; 1792 ki->p_vm_tsize = 0; 1793 ki->p_vm_dsize = 0; 1794 ki->p_vm_ssize = 0; 1795 } else { 1796 struct vmspace *vm = p->p_vmspace; 1797 1798 ki->p_vm_rssize = vm_resident_count(vm); 1799 ki->p_vm_tsize = vm->vm_tsize; 1800 ki->p_vm_dsize = vm->vm_dsize; 1801 ki->p_vm_ssize = vm->vm_ssize; 1802 } 1803 1804 if (p->p_session->s_ttyvp) 1805 ki->p_eflag |= EPROC_CTTY; 1806 if (SESS_LEADER(p)) 1807 ki->p_eflag |= EPROC_SLEADER; 1808 1809 /* XXX Is this double check necessary? */ 1810 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1811 ki->p_uvalid = 0; 1812 } else { 1813 ki->p_uvalid = 1; 1814 1815 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1816 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1817 1818 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1819 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1820 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1821 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1822 1823 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1824 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1825 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1826 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1827 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1828 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1829 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1830 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1831 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1832 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1833 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1834 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1835 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1836 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1837 1838 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1839 p->p_stats->p_cru.ru_stime.tv_sec; 1840 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1841 p->p_stats->p_cru.ru_stime.tv_usec; 1842 } 1843 #ifdef MULTIPROCESSOR 1844 if (p->p_cpu != NULL) 1845 ki->p_cpuid = p->p_cpu->ci_cpuid; 1846 else 1847 #endif 1848 ki->p_cpuid = KI_NOCPU; 1849 } 1850 1851 int 1852 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1853 struct proc *up) 1854 { 1855 struct ps_strings pss; 1856 struct proc *p; 1857 size_t len, upper_bound, xlen, i; 1858 struct uio auio; 1859 struct iovec aiov; 1860 vaddr_t argv; 1861 pid_t pid; 1862 int nargv, type, error; 1863 char *arg; 1864 char *tmp; 1865 1866 if (namelen != 2) 1867 return (EINVAL); 1868 pid = name[0]; 1869 type = name[1]; 1870 1871 switch (type) { 1872 case KERN_PROC_ARGV: 1873 case KERN_PROC_NARGV: 1874 case KERN_PROC_ENV: 1875 case KERN_PROC_NENV: 1876 /* ok */ 1877 break; 1878 default: 1879 return (EINVAL); 1880 } 1881 1882 /* check pid */ 1883 if ((p = pfind(pid)) == NULL) 1884 return (EINVAL); 1885 1886 /* only root or same user change look at the environment */ 1887 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1888 if (up->p_ucred->cr_uid != 0) { 1889 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1890 up->p_cred->p_ruid != p->p_cred->p_svuid) 1891 return (EPERM); 1892 } 1893 } 1894 1895 if (sizep != NULL && where == NULL) { 1896 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1897 *sizep = sizeof (int); 1898 else 1899 *sizep = ARG_MAX; /* XXX XXX XXX */ 1900 return (0); 1901 } 1902 if (where == NULL || sizep == NULL) 1903 return (EINVAL); 1904 1905 /* 1906 * Zombies don't have a stack, so we can't read their psstrings. 1907 * System processes also don't have a user stack. 1908 */ 1909 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1910 return (EINVAL); 1911 1912 /* 1913 * Lock the process down in memory. 1914 */ 1915 /* XXXCDC: how should locking work here? */ 1916 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1917 return (EFAULT); 1918 p->p_vmspace->vm_refcnt++; /* XXX */ 1919 1920 /* 1921 * Allocate a temporary buffer to hold the arguments. 1922 */ 1923 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1924 1925 /* 1926 * Read in the ps_strings structure. 1927 */ 1928 aiov.iov_base = &pss; 1929 aiov.iov_len = sizeof(pss); 1930 auio.uio_iov = &aiov; 1931 auio.uio_iovcnt = 1; 1932 auio.uio_offset = (vaddr_t)p->p_psstr; 1933 auio.uio_resid = sizeof(pss); 1934 auio.uio_segflg = UIO_SYSSPACE; 1935 auio.uio_rw = UIO_READ; 1936 auio.uio_procp = NULL; 1937 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1938 if (error) 1939 goto done; 1940 1941 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1942 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1943 else 1944 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1945 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1946 error = copyout(&nargv, where, sizeof(nargv)); 1947 *sizep = sizeof(nargv); 1948 goto done; 1949 } 1950 /* 1951 * Now read the address of the argument vector. 1952 */ 1953 switch (type) { 1954 case KERN_PROC_ARGV: 1955 /* XXX compat32 stuff here */ 1956 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1957 break; 1958 case KERN_PROC_ENV: 1959 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1960 break; 1961 default: 1962 return (EINVAL); 1963 } 1964 auio.uio_offset = (off_t)(long)tmp; 1965 aiov.iov_base = &argv; 1966 aiov.iov_len = sizeof(argv); 1967 auio.uio_iov = &aiov; 1968 auio.uio_iovcnt = 1; 1969 auio.uio_resid = sizeof(argv); 1970 auio.uio_segflg = UIO_SYSSPACE; 1971 auio.uio_rw = UIO_READ; 1972 auio.uio_procp = NULL; 1973 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1974 if (error) 1975 goto done; 1976 1977 /* 1978 * Now copy in the actual argument vector, one page at a time, 1979 * since we don't know how long the vector is (though, we do 1980 * know how many NUL-terminated strings are in the vector). 1981 */ 1982 len = 0; 1983 upper_bound = *sizep; 1984 for (; nargv != 0 && len < upper_bound; len += xlen) { 1985 aiov.iov_base = arg; 1986 aiov.iov_len = PAGE_SIZE; 1987 auio.uio_iov = &aiov; 1988 auio.uio_iovcnt = 1; 1989 auio.uio_offset = argv + len; 1990 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1991 auio.uio_resid = xlen; 1992 auio.uio_segflg = UIO_SYSSPACE; 1993 auio.uio_rw = UIO_READ; 1994 auio.uio_procp = NULL; 1995 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1996 if (error) 1997 goto done; 1998 1999 for (i = 0; i < xlen && nargv != 0; i++) { 2000 if (arg[i] == '\0') 2001 nargv--; /* one full string */ 2002 } 2003 2004 /* 2005 * Make sure we don't copyout past the end of the user's 2006 * buffer. 2007 */ 2008 if (len + i > upper_bound) 2009 i = upper_bound - len; 2010 2011 error = copyout(arg, (char *)where + len, i); 2012 if (error) 2013 break; 2014 2015 if (nargv == 0) { 2016 len += i; 2017 break; 2018 } 2019 } 2020 *sizep = len; 2021 2022 done: 2023 uvmspace_free(p->p_vmspace); 2024 2025 free(arg, M_TEMP); 2026 return (error); 2027 } 2028 2029 #if NPTY > 0 2030 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2031 2032 /* 2033 * Validate parameters and get old / set new parameters 2034 * for pty sysctl function. 2035 */ 2036 static int 2037 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2038 { 2039 int error = 0; 2040 int oldmax = 0, newmax = 0; 2041 2042 /* get current value of maxptys */ 2043 oldmax = pty_maxptys(0, 0); 2044 2045 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2046 2047 if (!error && newp) { 2048 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2049 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2050 2051 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2052 return (EINVAL); 2053 2054 } 2055 2056 return (error); 2057 } 2058 #endif /* NPTY > 0 */ 2059 2060 static int 2061 sysctl_dotkstat(name, namelen, where, sizep, newp) 2062 int *name; 2063 u_int namelen; 2064 void *where; 2065 size_t *sizep; 2066 void *newp; 2067 { 2068 /* all sysctl names at this level are terminal */ 2069 if (namelen != 1) 2070 return (ENOTDIR); /* overloaded */ 2071 2072 switch (name[0]) { 2073 case KERN_TKSTAT_NIN: 2074 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2075 case KERN_TKSTAT_NOUT: 2076 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2077 case KERN_TKSTAT_CANCC: 2078 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2079 case KERN_TKSTAT_RAWCC: 2080 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2081 default: 2082 return (EOPNOTSUPP); 2083 } 2084 } 2085
Indexes created Sun Sep 21 20:09:37 GMT 2025