kern_sysctl.c revision 1.121
1 /* $NetBSD: kern_sysctl.c,v 1.121 2002/12/12 20:54:58 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 1.121 2002/12/12 20:54:58 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 maxproc = nmaxproc; 389 } 390 391 return (error); 392 } 393 case KERN_MAXFILES: 394 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 395 case KERN_ARGMAX: 396 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 397 case KERN_SECURELVL: 398 level = securelevel; 399 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 400 newp == NULL) 401 return (error); 402 if (level < securelevel && p->p_pid != 1) 403 return (EPERM); 404 securelevel = level; 405 return (0); 406 case KERN_HOSTNAME: 407 error = sysctl_string(oldp, oldlenp, newp, newlen, 408 hostname, sizeof(hostname)); 409 if (newp && !error) 410 hostnamelen = newlen; 411 return (error); 412 case KERN_DOMAINNAME: 413 error = sysctl_string(oldp, oldlenp, newp, newlen, 414 domainname, sizeof(domainname)); 415 if (newp && !error) 416 domainnamelen = newlen; 417 return (error); 418 case KERN_HOSTID: 419 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 420 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 421 if (newp && !error) 422 hostid = inthostid; 423 return (error); 424 case KERN_CLOCKRATE: 425 return (sysctl_clockrate(oldp, oldlenp)); 426 case KERN_BOOTTIME: 427 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 428 sizeof(struct timeval))); 429 case KERN_VNODE: 430 return (sysctl_vnode(oldp, oldlenp, p)); 431 case KERN_PROC: 432 case KERN_PROC2: 433 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 434 case KERN_PROC_ARGS: 435 return (sysctl_procargs(name + 1, namelen - 1, 436 oldp, oldlenp, p)); 437 case KERN_FILE: 438 return (sysctl_file(oldp, oldlenp)); 439 #ifdef GPROF 440 case KERN_PROF: 441 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 442 newp, newlen)); 443 #endif 444 case KERN_POSIX1: 445 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 446 case KERN_NGROUPS: 447 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 448 case KERN_JOB_CONTROL: 449 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 450 case KERN_SAVED_IDS: 451 #ifdef _POSIX_SAVED_IDS 452 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 453 #else 454 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 455 #endif 456 case KERN_MAXPARTITIONS: 457 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 458 case KERN_RAWPARTITION: 459 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 460 #ifdef NTP 461 case KERN_NTPTIME: 462 return (sysctl_ntptime(oldp, oldlenp)); 463 #endif 464 case KERN_AUTONICETIME: 465 old_autonicetime = autonicetime; 466 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 467 if (autonicetime < 0) 468 autonicetime = old_autonicetime; 469 return (error); 470 case KERN_AUTONICEVAL: 471 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 472 if (autoniceval < PRIO_MIN) 473 autoniceval = PRIO_MIN; 474 if (autoniceval > PRIO_MAX) 475 autoniceval = PRIO_MAX; 476 return (error); 477 case KERN_RTC_OFFSET: 478 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 479 case KERN_ROOT_DEVICE: 480 return (sysctl_rdstring(oldp, oldlenp, newp, 481 root_device->dv_xname)); 482 case KERN_MSGBUFSIZE: 483 /* 484 * deal with cases where the message buffer has 485 * become corrupted. 486 */ 487 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 488 msgbufenabled = 0; 489 return (ENXIO); 490 } 491 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 492 case KERN_FSYNC: 493 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 494 case KERN_SYSVMSG: 495 #ifdef SYSVMSG 496 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 497 #else 498 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 499 #endif 500 case KERN_SYSVSEM: 501 #ifdef SYSVSEM 502 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 503 #else 504 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 505 #endif 506 case KERN_SYSVSHM: 507 #ifdef SYSVSHM 508 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 509 #else 510 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 511 #endif 512 case KERN_DEFCORENAME: 513 if (newp && newlen < 1) 514 return (EINVAL); 515 error = sysctl_string(oldp, oldlenp, newp, newlen, 516 defcorename, sizeof(defcorename)); 517 if (newp && !error) 518 defcorenamelen = newlen; 519 return (error); 520 case KERN_SYNCHRONIZED_IO: 521 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 522 case KERN_IOV_MAX: 523 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 524 case KERN_MBUF: 525 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 526 newp, newlen)); 527 case KERN_MAPPED_FILES: 528 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 529 case KERN_MEMLOCK: 530 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 531 case KERN_MEMLOCK_RANGE: 532 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 533 case KERN_MEMORY_PROTECTION: 534 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 535 case KERN_LOGIN_NAME_MAX: 536 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 537 case KERN_LOGSIGEXIT: 538 return (sysctl_int(oldp, oldlenp, newp, newlen, 539 &kern_logsigexit)); 540 case KERN_FSCALE: 541 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 542 case KERN_CCPU: 543 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 544 case KERN_CP_TIME: 545 #ifndef MULTIPROCESSOR 546 return (sysctl_rdstruct(oldp, oldlenp, newp, 547 curcpu()->ci_schedstate.spc_cp_time, 548 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 549 #else 550 return (sysctl_docptime(oldp, oldlenp, newp)); 551 #endif 552 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 553 case KERN_SYSVIPC_INFO: 554 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 555 #endif 556 case KERN_MSGBUF: 557 return (sysctl_msgbuf(oldp, oldlenp)); 558 case KERN_CONSDEV: 559 if (cn_tab != NULL) 560 consdev = cn_tab->cn_dev; 561 else 562 consdev = NODEV; 563 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 564 sizeof consdev)); 565 #if NPTY > 0 566 case KERN_MAXPTYS: 567 return sysctl_pty(oldp, oldlenp, newp, newlen); 568 #endif 569 #ifndef PIPE_SOCKETPAIR 570 case KERN_PIPE: 571 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 572 newp, newlen)); 573 #endif 574 case KERN_MAXPHYS: 575 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 576 case KERN_SBMAX: 577 { 578 int new_sbmax = sb_max; 579 580 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 581 if (newp && !error) { 582 if (new_sbmax < (16 * 1024)) /* sanity */ 583 return (EINVAL); 584 sb_max = new_sbmax; 585 } 586 return (error); 587 } 588 case KERN_TKSTAT: 589 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 590 newp)); 591 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 592 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 593 case KERN_URND: 594 #if NRND > 0 595 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 596 sizeof(v)) 597 return (sysctl_rdint(oldp, oldlenp, newp, v)); 598 else 599 return (EIO); /*XXX*/ 600 #else 601 return (EOPNOTSUPP); 602 #endif 603 case KERN_LABELSECTOR: 604 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 605 case KERN_LABELOFFSET: 606 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 607 case KERN_FORKFSLEEP: 608 { 609 /* userland sees value in ms, internally is in ticks */ 610 int timo, lsleep = forkfsleep * 1000 / hz; 611 612 error = (sysctl_int(oldp, oldlenp, newp, newlen, &lsleep)); 613 if (newp && !error) { 614 /* refuse negative values, and overly 'long time' */ 615 if (lsleep < 0 || lsleep > MAXSLP * 1000) 616 return (EINVAL); 617 618 timo = mstohz(lsleep); 619 620 /* if the interval is >0 ms && <1 tick, use 1 tick */ 621 if (lsleep != 0 && timo == 0) 622 forkfsleep = 1; 623 else 624 forkfsleep = timo; 625 } 626 return (error); 627 } 628 629 default: 630 return (EOPNOTSUPP); 631 } 632 /* NOTREACHED */ 633 } 634 635 /* 636 * hardware related system variables. 637 */ 638 int 639 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 640 void *newp, size_t newlen, struct proc *p) 641 { 642 643 /* All sysctl names at this level, except for a few, are terminal. */ 644 switch (name[0]) { 645 case HW_DISKSTATS: 646 /* Not terminal. */ 647 break; 648 default: 649 if (namelen != 1) 650 return (ENOTDIR); /* overloaded */ 651 } 652 653 switch (name[0]) { 654 case HW_MACHINE: 655 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 656 case HW_MACHINE_ARCH: 657 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 658 case HW_MODEL: 659 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 660 case HW_NCPU: 661 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 662 case HW_BYTEORDER: 663 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 664 case HW_PHYSMEM: 665 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 666 case HW_USERMEM: 667 return (sysctl_rdint(oldp, oldlenp, newp, 668 ctob(physmem - uvmexp.wired))); 669 case HW_PAGESIZE: 670 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 671 case HW_ALIGNBYTES: 672 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 673 case HW_DISKNAMES: 674 return (sysctl_disknames(oldp, oldlenp)); 675 case HW_DISKSTATS: 676 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 677 case HW_CNMAGIC: { 678 char magic[CNS_LEN]; 679 int error; 680 681 if (oldp) 682 cn_get_magic(magic, CNS_LEN); 683 error = sysctl_string(oldp, oldlenp, newp, newlen, 684 magic, sizeof(magic)); 685 if (newp && !error) { 686 error = cn_set_magic(magic); 687 } 688 return (error); 689 } 690 default: 691 return (EOPNOTSUPP); 692 } 693 /* NOTREACHED */ 694 } 695 696 #ifdef DEBUG 697 /* 698 * Debugging related system variables. 699 */ 700 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 701 struct ctldebug debug5, debug6, debug7, debug8, debug9; 702 struct ctldebug debug10, debug11, debug12, debug13, debug14; 703 struct ctldebug debug15, debug16, debug17, debug18, debug19; 704 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 705 &debug0, &debug1, &debug2, &debug3, &debug4, 706 &debug5, &debug6, &debug7, &debug8, &debug9, 707 &debug10, &debug11, &debug12, &debug13, &debug14, 708 &debug15, &debug16, &debug17, &debug18, &debug19, 709 }; 710 711 int 712 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 713 void *newp, size_t newlen, struct proc *p) 714 { 715 struct ctldebug *cdp; 716 717 /* all sysctl names at this level are name and field */ 718 if (namelen != 2) 719 return (ENOTDIR); /* overloaded */ 720 if (name[0] >= CTL_DEBUG_MAXID) 721 return (EOPNOTSUPP); 722 cdp = debugvars[name[0]]; 723 if (cdp->debugname == 0) 724 return (EOPNOTSUPP); 725 switch (name[1]) { 726 case CTL_DEBUG_NAME: 727 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 728 case CTL_DEBUG_VALUE: 729 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 730 default: 731 return (EOPNOTSUPP); 732 } 733 /* NOTREACHED */ 734 } 735 #endif /* DEBUG */ 736 737 int 738 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 739 void *newp, size_t newlen, struct proc *p) 740 { 741 struct proc *ptmp = NULL; 742 const struct proclist_desc *pd; 743 int error = 0; 744 struct rlimit alim; 745 struct plimit *newplim; 746 char *tmps = NULL; 747 size_t len, curlen; 748 u_int i; 749 750 if (namelen < 2) 751 return EINVAL; 752 753 if (name[0] == PROC_CURPROC) { 754 ptmp = p; 755 } else { 756 proclist_lock_read(); 757 for (pd = proclists; pd->pd_list != NULL; pd++) { 758 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 759 ptmp = LIST_NEXT(ptmp, p_list)) { 760 /* Skip embryonic processes. */ 761 if (ptmp->p_stat == SIDL) 762 continue; 763 if (ptmp->p_pid == (pid_t)name[0]) 764 break; 765 } 766 if (ptmp != NULL) 767 break; 768 } 769 proclist_unlock_read(); 770 if (ptmp == NULL) 771 return(ESRCH); 772 if (p->p_ucred->cr_uid != 0) { 773 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 774 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 775 return EPERM; 776 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 777 return EPERM; /* sgid proc */ 778 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 779 if (p->p_ucred->cr_groups[i] == 780 ptmp->p_cred->p_rgid) 781 break; 782 } 783 if (i == p->p_ucred->cr_ngroups) 784 return EPERM; 785 } 786 } 787 switch(name[1]) { 788 case PROC_PID_STOPFORK: 789 if (namelen != 2) 790 return EINVAL; 791 i = ((ptmp->p_flag & P_STOPFORK) != 0); 792 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 793 return error; 794 if (i != 0) 795 ptmp->p_flag |= P_STOPFORK; 796 else 797 ptmp->p_flag &= ~P_STOPFORK; 798 return 0; 799 break; 800 801 case PROC_PID_STOPEXEC: 802 if (namelen != 2) 803 return EINVAL; 804 i = ((ptmp->p_flag & P_STOPEXEC) != 0); 805 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 806 return error; 807 if (i != 0) 808 ptmp->p_flag |= P_STOPEXEC; 809 else 810 ptmp->p_flag &= ~P_STOPEXEC; 811 return 0; 812 break; 813 814 case PROC_PID_CORENAME: 815 if (namelen != 2) 816 return EINVAL; 817 /* 818 * Can't use sysctl_string() here because we may malloc a new 819 * area during the process, so we have to do it by hand. 820 */ 821 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 822 if (oldlenp && *oldlenp < curlen) { 823 if (!oldp) 824 *oldlenp = curlen; 825 return (ENOMEM); 826 } 827 if (newp) { 828 if (securelevel > 2) 829 return EPERM; 830 if (newlen > MAXPATHLEN) 831 return ENAMETOOLONG; 832 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 833 if (tmps == NULL) 834 return ENOMEM; 835 error = copyin(newp, tmps, newlen + 1); 836 tmps[newlen] = '\0'; 837 if (error) 838 goto cleanup; 839 /* Enforce to be either 'core' for end with '.core' */ 840 if (newlen < 4) { /* c.o.r.e */ 841 error = EINVAL; 842 goto cleanup; 843 } 844 len = newlen - 4; 845 if (len > 0) { 846 if (tmps[len - 1] != '.' && 847 tmps[len - 1] != '/') { 848 error = EINVAL; 849 goto cleanup; 850 } 851 } 852 if (strcmp(&tmps[len], "core") != 0) { 853 error = EINVAL; 854 goto cleanup; 855 } 856 } 857 if (oldp && oldlenp) { 858 *oldlenp = curlen; 859 error = copyout(ptmp->p_limit->pl_corename, oldp, 860 curlen); 861 } 862 if (newp && error == 0) { 863 /* if the 2 strings are identical, don't limcopy() */ 864 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 865 error = 0; 866 goto cleanup; 867 } 868 if (ptmp->p_limit->p_refcnt > 1 && 869 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 870 newplim = limcopy(ptmp->p_limit); 871 limfree(ptmp->p_limit); 872 ptmp->p_limit = newplim; 873 } 874 if (ptmp->p_limit->pl_corename != defcorename) { 875 free(ptmp->p_limit->pl_corename, M_TEMP); 876 } 877 ptmp->p_limit->pl_corename = tmps; 878 return (0); 879 } 880 cleanup: 881 if (tmps) 882 free(tmps, M_TEMP); 883 return (error); 884 break; 885 886 case PROC_PID_LIMIT: 887 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 888 return EINVAL; 889 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 890 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 891 error = sysctl_quad(oldp, oldlenp, newp, newlen, 892 &alim.rlim_max); 893 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 894 error = sysctl_quad(oldp, oldlenp, newp, newlen, 895 &alim.rlim_cur); 896 else 897 error = EINVAL; 898 899 if (error) 900 return error; 901 902 if (newp) 903 error = dosetrlimit(ptmp, p->p_cred, 904 name[2] - 1, &alim); 905 return error; 906 break; 907 908 default: 909 return (EINVAL); 910 break; 911 } 912 /* NOTREACHED */ 913 return (EINVAL); 914 } 915 916 int 917 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 918 void *newp, size_t newlen, struct proc *p) 919 { 920 static struct { 921 const char *name; 922 int type; 923 } emulations[] = CTL_EMUL_NAMES; 924 const struct emul *e; 925 const char *ename; 926 #ifdef LKM 927 extern struct lock exec_lock; /* XXX */ 928 int error; 929 #else 930 extern int nexecs_builtin; 931 extern const struct execsw execsw_builtin[]; 932 int i; 933 #endif 934 935 /* all sysctl names at this level are name and field */ 936 if (namelen < 2) 937 return (ENOTDIR); /* overloaded */ 938 939 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 940 return (EOPNOTSUPP); 941 942 ename = emulations[name[0]].name; 943 944 #ifdef LKM 945 lockmgr(&exec_lock, LK_SHARED, NULL); 946 if ((e = emul_search(ename))) { 947 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 948 newp, newlen, p); 949 } else 950 error = EOPNOTSUPP; 951 lockmgr(&exec_lock, LK_RELEASE, NULL); 952 953 return (error); 954 #else 955 for (i = 0; i < nexecs_builtin; i++) { 956 e = execsw_builtin[i].es_emul; 957 /* 958 * In order to match e.g. e->e_name "irix o32" with ename "irix", 959 * we limit the comparison to the length of ename. 960 */ 961 if (e == NULL || strncmp(ename, e->e_name, strlen(ename)) != 0 || 962 e->e_sysctl == NULL) 963 continue; 964 965 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 966 newp, newlen, p); 967 } 968 969 return (EOPNOTSUPP); 970 #endif 971 } 972 /* 973 * Convenience macros. 974 */ 975 976 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 977 if (oldlenp) { \ 978 if (!oldp) \ 979 *oldlenp = len; \ 980 else { \ 981 if (*oldlenp < len) \ 982 return(ENOMEM); \ 983 *oldlenp = len; \ 984 error = copyout((caddr_t)valp, oldp, len); \ 985 } \ 986 } 987 988 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 989 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 990 991 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 992 if (newp && newlen != len) \ 993 return (EINVAL); 994 995 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 996 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 997 998 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 999 if (error == 0 && newp) \ 1000 error = copyin(newp, valp, len); 1001 1002 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1003 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1004 1005 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1006 if (oldlenp) { \ 1007 len = strlen(str) + 1; \ 1008 if (!oldp) \ 1009 *oldlenp = len; \ 1010 else { \ 1011 if (*oldlenp < len) { \ 1012 err2 = ENOMEM; \ 1013 len = *oldlenp; \ 1014 } else \ 1015 *oldlenp = len; \ 1016 error = copyout(str, oldp, len);\ 1017 if (error == 0) \ 1018 error = err2; \ 1019 } \ 1020 } 1021 1022 /* 1023 * Validate parameters and get old / set new parameters 1024 * for an integer-valued sysctl function. 1025 */ 1026 int 1027 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1028 { 1029 int error = 0; 1030 1031 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1032 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1033 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1034 1035 return (error); 1036 } 1037 1038 1039 /* 1040 * As above, but read-only. 1041 */ 1042 int 1043 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1044 { 1045 int error = 0; 1046 1047 if (newp) 1048 return (EPERM); 1049 1050 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1051 1052 return (error); 1053 } 1054 1055 /* 1056 * Validate parameters and get old / set new parameters 1057 * for an quad-valued sysctl function. 1058 */ 1059 int 1060 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1061 quad_t *valp) 1062 { 1063 int error = 0; 1064 1065 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1066 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1067 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1068 1069 return (error); 1070 } 1071 1072 /* 1073 * As above, but read-only. 1074 */ 1075 int 1076 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1077 { 1078 int error = 0; 1079 1080 if (newp) 1081 return (EPERM); 1082 1083 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1084 1085 return (error); 1086 } 1087 1088 /* 1089 * Validate parameters and get old / set new parameters 1090 * for a string-valued sysctl function. 1091 */ 1092 int 1093 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1094 size_t maxlen) 1095 { 1096 int error = 0, err2 = 0; 1097 size_t len; 1098 1099 if (newp && newlen >= maxlen) 1100 return (EINVAL); 1101 1102 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1103 1104 if (error == 0 && newp) { 1105 error = copyin(newp, str, newlen); 1106 str[newlen] = 0; 1107 } 1108 return (error); 1109 } 1110 1111 /* 1112 * As above, but read-only. 1113 */ 1114 int 1115 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1116 { 1117 int error = 0, err2 = 0; 1118 size_t len; 1119 1120 if (newp) 1121 return (EPERM); 1122 1123 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1124 1125 return (error); 1126 } 1127 1128 /* 1129 * Validate parameters and get old / set new parameters 1130 * for a structure oriented sysctl function. 1131 */ 1132 int 1133 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1134 size_t len) 1135 { 1136 int error = 0; 1137 1138 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1139 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1140 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1141 1142 return (error); 1143 } 1144 1145 /* 1146 * Validate parameters and get old parameters 1147 * for a structure oriented sysctl function. 1148 */ 1149 int 1150 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1151 size_t len) 1152 { 1153 int error = 0; 1154 1155 if (newp) 1156 return (EPERM); 1157 1158 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1159 1160 return (error); 1161 } 1162 1163 /* 1164 * As above, but can return a truncated result. 1165 */ 1166 int 1167 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1168 size_t len) 1169 { 1170 int error = 0; 1171 1172 if (newp) 1173 return (EPERM); 1174 1175 len = min(*oldlenp, len); 1176 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1177 1178 return (error); 1179 } 1180 1181 /* 1182 * Get file structures. 1183 */ 1184 static int 1185 sysctl_file(void *vwhere, size_t *sizep) 1186 { 1187 int error; 1188 size_t buflen; 1189 struct file *fp; 1190 char *start, *where; 1191 1192 start = where = vwhere; 1193 buflen = *sizep; 1194 if (where == NULL) { 1195 /* 1196 * overestimate by 10 files 1197 */ 1198 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1199 return (0); 1200 } 1201 1202 /* 1203 * first copyout filehead 1204 */ 1205 if (buflen < sizeof(filehead)) { 1206 *sizep = 0; 1207 return (0); 1208 } 1209 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1210 if (error) 1211 return (error); 1212 buflen -= sizeof(filehead); 1213 where += sizeof(filehead); 1214 1215 /* 1216 * followed by an array of file structures 1217 */ 1218 LIST_FOREACH(fp, &filehead, f_list) { 1219 if (buflen < sizeof(struct file)) { 1220 *sizep = where - start; 1221 return (ENOMEM); 1222 } 1223 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1224 if (error) 1225 return (error); 1226 buflen -= sizeof(struct file); 1227 where += sizeof(struct file); 1228 } 1229 *sizep = where - start; 1230 return (0); 1231 } 1232 1233 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1234 #define FILL_PERM(src, dst) do { \ 1235 (dst)._key = (src)._key; \ 1236 (dst).uid = (src).uid; \ 1237 (dst).gid = (src).gid; \ 1238 (dst).cuid = (src).cuid; \ 1239 (dst).cgid = (src).cgid; \ 1240 (dst).mode = (src).mode; \ 1241 (dst)._seq = (src)._seq; \ 1242 } while (/*CONSTCOND*/ 0); 1243 #define FILL_MSG(src, dst) do { \ 1244 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1245 (dst).msg_qnum = (src).msg_qnum; \ 1246 (dst).msg_qbytes = (src).msg_qbytes; \ 1247 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1248 (dst).msg_lspid = (src).msg_lspid; \ 1249 (dst).msg_lrpid = (src).msg_lrpid; \ 1250 (dst).msg_stime = (src).msg_stime; \ 1251 (dst).msg_rtime = (src).msg_rtime; \ 1252 (dst).msg_ctime = (src).msg_ctime; \ 1253 } while (/*CONSTCOND*/ 0) 1254 #define FILL_SEM(src, dst) do { \ 1255 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1256 (dst).sem_nsems = (src).sem_nsems; \ 1257 (dst).sem_otime = (src).sem_otime; \ 1258 (dst).sem_ctime = (src).sem_ctime; \ 1259 } while (/*CONSTCOND*/ 0) 1260 #define FILL_SHM(src, dst) do { \ 1261 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1262 (dst).shm_segsz = (src).shm_segsz; \ 1263 (dst).shm_lpid = (src).shm_lpid; \ 1264 (dst).shm_cpid = (src).shm_cpid; \ 1265 (dst).shm_atime = (src).shm_atime; \ 1266 (dst).shm_dtime = (src).shm_dtime; \ 1267 (dst).shm_ctime = (src).shm_ctime; \ 1268 (dst).shm_nattch = (src).shm_nattch; \ 1269 } while (/*CONSTCOND*/ 0) 1270 1271 static int 1272 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1273 { 1274 #ifdef SYSVMSG 1275 struct msg_sysctl_info *msgsi = NULL; 1276 #endif 1277 #ifdef SYSVSEM 1278 struct sem_sysctl_info *semsi = NULL; 1279 #endif 1280 #ifdef SYSVSHM 1281 struct shm_sysctl_info *shmsi = NULL; 1282 #endif 1283 size_t infosize, dssize, tsize, buflen; 1284 void *buf = NULL; 1285 char *start; 1286 int32_t nds; 1287 int i, error, ret; 1288 1289 if (namelen != 1) 1290 return (EINVAL); 1291 1292 start = where; 1293 buflen = *sizep; 1294 1295 switch (*name) { 1296 case KERN_SYSVIPC_MSG_INFO: 1297 #ifdef SYSVMSG 1298 infosize = sizeof(msgsi->msginfo); 1299 nds = msginfo.msgmni; 1300 dssize = sizeof(msgsi->msgids[0]); 1301 break; 1302 #else 1303 return (EINVAL); 1304 #endif 1305 case KERN_SYSVIPC_SEM_INFO: 1306 #ifdef SYSVSEM 1307 infosize = sizeof(semsi->seminfo); 1308 nds = seminfo.semmni; 1309 dssize = sizeof(semsi->semids[0]); 1310 break; 1311 #else 1312 return (EINVAL); 1313 #endif 1314 case KERN_SYSVIPC_SHM_INFO: 1315 #ifdef SYSVSHM 1316 infosize = sizeof(shmsi->shminfo); 1317 nds = shminfo.shmmni; 1318 dssize = sizeof(shmsi->shmids[0]); 1319 break; 1320 #else 1321 return (EINVAL); 1322 #endif 1323 default: 1324 return (EINVAL); 1325 } 1326 /* 1327 * Round infosize to 64 bit boundary if requesting more than just 1328 * the info structure or getting the total data size. 1329 */ 1330 if (where == NULL || *sizep > infosize) 1331 infosize = ((infosize + 7) / 8) * 8; 1332 tsize = infosize + nds * dssize; 1333 1334 /* Return just the total size required. */ 1335 if (where == NULL) { 1336 *sizep = tsize; 1337 return (0); 1338 } 1339 1340 /* Not enough room for even the info struct. */ 1341 if (buflen < infosize) { 1342 *sizep = 0; 1343 return (ENOMEM); 1344 } 1345 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1346 memset(buf, 0, min(tsize, buflen)); 1347 1348 switch (*name) { 1349 #ifdef SYSVMSG 1350 case KERN_SYSVIPC_MSG_INFO: 1351 msgsi = (struct msg_sysctl_info *)buf; 1352 msgsi->msginfo = msginfo; 1353 break; 1354 #endif 1355 #ifdef SYSVSEM 1356 case KERN_SYSVIPC_SEM_INFO: 1357 semsi = (struct sem_sysctl_info *)buf; 1358 semsi->seminfo = seminfo; 1359 break; 1360 #endif 1361 #ifdef SYSVSHM 1362 case KERN_SYSVIPC_SHM_INFO: 1363 shmsi = (struct shm_sysctl_info *)buf; 1364 shmsi->shminfo = shminfo; 1365 break; 1366 #endif 1367 } 1368 buflen -= infosize; 1369 1370 ret = 0; 1371 if (buflen > 0) { 1372 /* Fill in the IPC data structures. */ 1373 for (i = 0; i < nds; i++) { 1374 if (buflen < dssize) { 1375 ret = ENOMEM; 1376 break; 1377 } 1378 switch (*name) { 1379 #ifdef SYSVMSG 1380 case KERN_SYSVIPC_MSG_INFO: 1381 FILL_MSG(msqids[i], msgsi->msgids[i]); 1382 break; 1383 #endif 1384 #ifdef SYSVSEM 1385 case KERN_SYSVIPC_SEM_INFO: 1386 FILL_SEM(sema[i], semsi->semids[i]); 1387 break; 1388 #endif 1389 #ifdef SYSVSHM 1390 case KERN_SYSVIPC_SHM_INFO: 1391 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1392 break; 1393 #endif 1394 } 1395 buflen -= dssize; 1396 } 1397 } 1398 *sizep -= buflen; 1399 error = copyout(buf, start, *sizep); 1400 /* If copyout succeeded, use return code set earlier. */ 1401 if (error == 0) 1402 error = ret; 1403 if (buf) 1404 free(buf, M_TEMP); 1405 return (error); 1406 } 1407 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1408 1409 static int 1410 sysctl_msgbuf(void *vwhere, size_t *sizep) 1411 { 1412 char *where = vwhere; 1413 size_t len, maxlen = *sizep; 1414 long beg, end; 1415 int error; 1416 1417 /* 1418 * deal with cases where the message buffer has 1419 * become corrupted. 1420 */ 1421 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1422 msgbufenabled = 0; 1423 return (ENXIO); 1424 } 1425 1426 if (where == NULL) { 1427 /* always return full buffer size */ 1428 *sizep = msgbufp->msg_bufs; 1429 return (0); 1430 } 1431 1432 error = 0; 1433 maxlen = min(msgbufp->msg_bufs, maxlen); 1434 1435 /* 1436 * First, copy from the write pointer to the end of 1437 * message buffer. 1438 */ 1439 beg = msgbufp->msg_bufx; 1440 end = msgbufp->msg_bufs; 1441 while (maxlen > 0) { 1442 len = min(end - beg, maxlen); 1443 if (len == 0) 1444 break; 1445 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1446 if (error) 1447 break; 1448 where += len; 1449 maxlen -= len; 1450 1451 /* 1452 * ... then, copy from the beginning of message buffer to 1453 * the write pointer. 1454 */ 1455 beg = 0; 1456 end = msgbufp->msg_bufx; 1457 } 1458 return (error); 1459 } 1460 1461 /* 1462 * try over estimating by 5 procs 1463 */ 1464 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1465 1466 static int 1467 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1468 { 1469 struct eproc eproc; 1470 struct kinfo_proc2 kproc2; 1471 struct kinfo_proc *dp; 1472 struct proc *p; 1473 const struct proclist_desc *pd; 1474 char *where, *dp2; 1475 int type, op, arg; 1476 u_int elem_size, elem_count; 1477 size_t buflen, needed; 1478 int error; 1479 1480 dp = vwhere; 1481 dp2 = where = vwhere; 1482 buflen = where != NULL ? *sizep : 0; 1483 error = 0; 1484 needed = 0; 1485 type = name[0]; 1486 1487 if (type == KERN_PROC) { 1488 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1489 return (EINVAL); 1490 op = name[1]; 1491 if (op != KERN_PROC_ALL) 1492 arg = name[2]; 1493 else 1494 arg = 0; /* Quell compiler warning */ 1495 elem_size = elem_count = 0; /* Ditto */ 1496 } else { 1497 if (namelen != 5) 1498 return (EINVAL); 1499 op = name[1]; 1500 arg = name[2]; 1501 elem_size = name[3]; 1502 elem_count = name[4]; 1503 } 1504 1505 proclist_lock_read(); 1506 1507 pd = proclists; 1508 again: 1509 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1510 /* 1511 * Skip embryonic processes. 1512 */ 1513 if (p->p_stat == SIDL) 1514 continue; 1515 /* 1516 * TODO - make more efficient (see notes below). 1517 * do by session. 1518 */ 1519 switch (op) { 1520 1521 case KERN_PROC_PID: 1522 /* could do this with just a lookup */ 1523 if (p->p_pid != (pid_t)arg) 1524 continue; 1525 break; 1526 1527 case KERN_PROC_PGRP: 1528 /* could do this by traversing pgrp */ 1529 if (p->p_pgrp->pg_id != (pid_t)arg) 1530 continue; 1531 break; 1532 1533 case KERN_PROC_SESSION: 1534 if (p->p_session->s_sid != (pid_t)arg) 1535 continue; 1536 break; 1537 1538 case KERN_PROC_TTY: 1539 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1540 if ((p->p_flag & P_CONTROLT) == 0 || 1541 p->p_session->s_ttyp == NULL || 1542 p->p_session->s_ttyvp != NULL) 1543 continue; 1544 } else if ((p->p_flag & P_CONTROLT) == 0 || 1545 p->p_session->s_ttyp == NULL) { 1546 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1547 continue; 1548 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1549 continue; 1550 break; 1551 1552 case KERN_PROC_UID: 1553 if (p->p_ucred->cr_uid != (uid_t)arg) 1554 continue; 1555 break; 1556 1557 case KERN_PROC_RUID: 1558 if (p->p_cred->p_ruid != (uid_t)arg) 1559 continue; 1560 break; 1561 1562 case KERN_PROC_GID: 1563 if (p->p_ucred->cr_gid != (uid_t)arg) 1564 continue; 1565 break; 1566 1567 case KERN_PROC_RGID: 1568 if (p->p_cred->p_rgid != (uid_t)arg) 1569 continue; 1570 break; 1571 1572 case KERN_PROC_ALL: 1573 /* allow everything */ 1574 break; 1575 1576 default: 1577 error = EINVAL; 1578 goto cleanup; 1579 } 1580 if (type == KERN_PROC) { 1581 if (buflen >= sizeof(struct kinfo_proc)) { 1582 fill_eproc(p, &eproc); 1583 error = copyout((caddr_t)p, &dp->kp_proc, 1584 sizeof(struct proc)); 1585 if (error) 1586 goto cleanup; 1587 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1588 sizeof(eproc)); 1589 if (error) 1590 goto cleanup; 1591 dp++; 1592 buflen -= sizeof(struct kinfo_proc); 1593 } 1594 needed += sizeof(struct kinfo_proc); 1595 } else { /* KERN_PROC2 */ 1596 if (buflen >= elem_size && elem_count > 0) { 1597 fill_kproc2(p, &kproc2); 1598 /* 1599 * Copy out elem_size, but not larger than 1600 * the size of a struct kinfo_proc2. 1601 */ 1602 error = copyout(&kproc2, dp2, 1603 min(sizeof(kproc2), elem_size)); 1604 if (error) 1605 goto cleanup; 1606 dp2 += elem_size; 1607 buflen -= elem_size; 1608 elem_count--; 1609 } 1610 needed += elem_size; 1611 } 1612 } 1613 pd++; 1614 if (pd->pd_list != NULL) 1615 goto again; 1616 proclist_unlock_read(); 1617 1618 if (where != NULL) { 1619 if (type == KERN_PROC) 1620 *sizep = (caddr_t)dp - where; 1621 else 1622 *sizep = dp2 - where; 1623 if (needed > *sizep) 1624 return (ENOMEM); 1625 } else { 1626 needed += KERN_PROCSLOP; 1627 *sizep = needed; 1628 } 1629 return (0); 1630 cleanup: 1631 proclist_unlock_read(); 1632 return (error); 1633 } 1634 1635 /* 1636 * Fill in an eproc structure for the specified process. 1637 */ 1638 void 1639 fill_eproc(struct proc *p, struct eproc *ep) 1640 { 1641 struct tty *tp; 1642 1643 ep->e_paddr = p; 1644 ep->e_sess = p->p_session; 1645 ep->e_pcred = *p->p_cred; 1646 ep->e_ucred = *p->p_ucred; 1647 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1648 ep->e_vm.vm_rssize = 0; 1649 ep->e_vm.vm_tsize = 0; 1650 ep->e_vm.vm_dsize = 0; 1651 ep->e_vm.vm_ssize = 0; 1652 /* ep->e_vm.vm_pmap = XXX; */ 1653 } else { 1654 struct vmspace *vm = p->p_vmspace; 1655 1656 ep->e_vm.vm_rssize = vm_resident_count(vm); 1657 ep->e_vm.vm_tsize = vm->vm_tsize; 1658 ep->e_vm.vm_dsize = vm->vm_dsize; 1659 ep->e_vm.vm_ssize = vm->vm_ssize; 1660 } 1661 if (p->p_pptr) 1662 ep->e_ppid = p->p_pptr->p_pid; 1663 else 1664 ep->e_ppid = 0; 1665 ep->e_pgid = p->p_pgrp->pg_id; 1666 ep->e_sid = ep->e_sess->s_sid; 1667 ep->e_jobc = p->p_pgrp->pg_jobc; 1668 if ((p->p_flag & P_CONTROLT) && 1669 (tp = ep->e_sess->s_ttyp)) { 1670 ep->e_tdev = tp->t_dev; 1671 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1672 ep->e_tsess = tp->t_session; 1673 } else 1674 ep->e_tdev = NODEV; 1675 if (p->p_wmesg) 1676 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1677 ep->e_xsize = ep->e_xrssize = 0; 1678 ep->e_xccount = ep->e_xswrss = 0; 1679 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1680 if (SESS_LEADER(p)) 1681 ep->e_flag |= EPROC_SLEADER; 1682 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1683 } 1684 1685 /* 1686 * Fill in an eproc structure for the specified process. 1687 */ 1688 static void 1689 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1690 { 1691 struct tty *tp; 1692 1693 memset(ki, 0, sizeof(*ki)); 1694 1695 ki->p_forw = PTRTOINT64(p->p_forw); 1696 ki->p_back = PTRTOINT64(p->p_back); 1697 ki->p_paddr = PTRTOINT64(p); 1698 1699 ki->p_addr = PTRTOINT64(p->p_addr); 1700 ki->p_fd = PTRTOINT64(p->p_fd); 1701 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1702 ki->p_stats = PTRTOINT64(p->p_stats); 1703 ki->p_limit = PTRTOINT64(p->p_limit); 1704 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1705 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1706 ki->p_sess = PTRTOINT64(p->p_session); 1707 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1708 ki->p_ru = PTRTOINT64(p->p_ru); 1709 1710 ki->p_eflag = 0; 1711 ki->p_exitsig = p->p_exitsig; 1712 ki->p_flag = p->p_flag; 1713 1714 ki->p_pid = p->p_pid; 1715 if (p->p_pptr) 1716 ki->p_ppid = p->p_pptr->p_pid; 1717 else 1718 ki->p_ppid = 0; 1719 ki->p_sid = p->p_session->s_sid; 1720 ki->p__pgid = p->p_pgrp->pg_id; 1721 1722 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1723 1724 ki->p_uid = p->p_ucred->cr_uid; 1725 ki->p_ruid = p->p_cred->p_ruid; 1726 ki->p_gid = p->p_ucred->cr_gid; 1727 ki->p_rgid = p->p_cred->p_rgid; 1728 1729 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1730 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1731 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1732 1733 ki->p_jobc = p->p_pgrp->pg_jobc; 1734 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1735 ki->p_tdev = tp->t_dev; 1736 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1737 ki->p_tsess = PTRTOINT64(tp->t_session); 1738 } else { 1739 ki->p_tdev = NODEV; 1740 } 1741 1742 ki->p_estcpu = p->p_estcpu; 1743 ki->p_rtime_sec = p->p_rtime.tv_sec; 1744 ki->p_rtime_usec = p->p_rtime.tv_usec; 1745 ki->p_cpticks = p->p_cpticks; 1746 ki->p_pctcpu = p->p_pctcpu; 1747 ki->p_swtime = p->p_swtime; 1748 ki->p_slptime = p->p_slptime; 1749 if (p->p_stat == SONPROC) { 1750 KDASSERT(p->p_cpu != NULL); 1751 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1752 } else 1753 ki->p_schedflags = 0; 1754 1755 ki->p_uticks = p->p_uticks; 1756 ki->p_sticks = p->p_sticks; 1757 ki->p_iticks = p->p_iticks; 1758 1759 ki->p_tracep = PTRTOINT64(p->p_tracep); 1760 ki->p_traceflag = p->p_traceflag; 1761 1762 ki->p_holdcnt = p->p_holdcnt; 1763 1764 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1765 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1766 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1767 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1768 1769 ki->p_stat = p->p_stat; 1770 ki->p_priority = p->p_priority; 1771 ki->p_usrpri = p->p_usrpri; 1772 ki->p_nice = p->p_nice; 1773 1774 ki->p_xstat = p->p_xstat; 1775 ki->p_acflag = p->p_acflag; 1776 1777 strncpy(ki->p_comm, p->p_comm, 1778 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1779 1780 if (p->p_wmesg) 1781 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1782 ki->p_wchan = PTRTOINT64(p->p_wchan); 1783 1784 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1785 1786 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1787 ki->p_vm_rssize = 0; 1788 ki->p_vm_tsize = 0; 1789 ki->p_vm_dsize = 0; 1790 ki->p_vm_ssize = 0; 1791 } else { 1792 struct vmspace *vm = p->p_vmspace; 1793 1794 ki->p_vm_rssize = vm_resident_count(vm); 1795 ki->p_vm_tsize = vm->vm_tsize; 1796 ki->p_vm_dsize = vm->vm_dsize; 1797 ki->p_vm_ssize = vm->vm_ssize; 1798 } 1799 1800 if (p->p_session->s_ttyvp) 1801 ki->p_eflag |= EPROC_CTTY; 1802 if (SESS_LEADER(p)) 1803 ki->p_eflag |= EPROC_SLEADER; 1804 1805 /* XXX Is this double check necessary? */ 1806 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1807 ki->p_uvalid = 0; 1808 } else { 1809 ki->p_uvalid = 1; 1810 1811 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1812 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1813 1814 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1815 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1816 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1817 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1818 1819 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1820 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1821 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1822 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1823 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1824 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1825 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1826 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1827 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1828 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1829 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1830 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1831 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1832 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1833 1834 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1835 p->p_stats->p_cru.ru_stime.tv_sec; 1836 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1837 p->p_stats->p_cru.ru_stime.tv_usec; 1838 } 1839 #ifdef MULTIPROCESSOR 1840 if (p->p_cpu != NULL) 1841 ki->p_cpuid = p->p_cpu->ci_cpuid; 1842 else 1843 #endif 1844 ki->p_cpuid = KI_NOCPU; 1845 } 1846 1847 int 1848 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1849 struct proc *up) 1850 { 1851 struct ps_strings pss; 1852 struct proc *p; 1853 size_t len, upper_bound, xlen, i; 1854 struct uio auio; 1855 struct iovec aiov; 1856 vaddr_t argv; 1857 pid_t pid; 1858 int nargv, type, error; 1859 char *arg; 1860 char *tmp; 1861 1862 if (namelen != 2) 1863 return (EINVAL); 1864 pid = name[0]; 1865 type = name[1]; 1866 1867 switch (type) { 1868 case KERN_PROC_ARGV: 1869 case KERN_PROC_NARGV: 1870 case KERN_PROC_ENV: 1871 case KERN_PROC_NENV: 1872 /* ok */ 1873 break; 1874 default: 1875 return (EINVAL); 1876 } 1877 1878 /* check pid */ 1879 if ((p = pfind(pid)) == NULL) 1880 return (EINVAL); 1881 1882 /* only root or same user change look at the environment */ 1883 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1884 if (up->p_ucred->cr_uid != 0) { 1885 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1886 up->p_cred->p_ruid != p->p_cred->p_svuid) 1887 return (EPERM); 1888 } 1889 } 1890 1891 if (sizep != NULL && where == NULL) { 1892 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1893 *sizep = sizeof (int); 1894 else 1895 *sizep = ARG_MAX; /* XXX XXX XXX */ 1896 return (0); 1897 } 1898 if (where == NULL || sizep == NULL) 1899 return (EINVAL); 1900 1901 /* 1902 * Zombies don't have a stack, so we can't read their psstrings. 1903 * System processes also don't have a user stack. 1904 */ 1905 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1906 return (EINVAL); 1907 1908 /* 1909 * Lock the process down in memory. 1910 */ 1911 /* XXXCDC: how should locking work here? */ 1912 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1913 return (EFAULT); 1914 p->p_vmspace->vm_refcnt++; /* XXX */ 1915 1916 /* 1917 * Allocate a temporary buffer to hold the arguments. 1918 */ 1919 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1920 1921 /* 1922 * Read in the ps_strings structure. 1923 */ 1924 aiov.iov_base = &pss; 1925 aiov.iov_len = sizeof(pss); 1926 auio.uio_iov = &aiov; 1927 auio.uio_iovcnt = 1; 1928 auio.uio_offset = (vaddr_t)p->p_psstr; 1929 auio.uio_resid = sizeof(pss); 1930 auio.uio_segflg = UIO_SYSSPACE; 1931 auio.uio_rw = UIO_READ; 1932 auio.uio_procp = NULL; 1933 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1934 if (error) 1935 goto done; 1936 1937 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1938 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1939 else 1940 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1941 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1942 error = copyout(&nargv, where, sizeof(nargv)); 1943 *sizep = sizeof(nargv); 1944 goto done; 1945 } 1946 /* 1947 * Now read the address of the argument vector. 1948 */ 1949 switch (type) { 1950 case KERN_PROC_ARGV: 1951 /* XXX compat32 stuff here */ 1952 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1953 break; 1954 case KERN_PROC_ENV: 1955 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1956 break; 1957 default: 1958 return (EINVAL); 1959 } 1960 auio.uio_offset = (off_t)(long)tmp; 1961 aiov.iov_base = &argv; 1962 aiov.iov_len = sizeof(argv); 1963 auio.uio_iov = &aiov; 1964 auio.uio_iovcnt = 1; 1965 auio.uio_resid = sizeof(argv); 1966 auio.uio_segflg = UIO_SYSSPACE; 1967 auio.uio_rw = UIO_READ; 1968 auio.uio_procp = NULL; 1969 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1970 if (error) 1971 goto done; 1972 1973 /* 1974 * Now copy in the actual argument vector, one page at a time, 1975 * since we don't know how long the vector is (though, we do 1976 * know how many NUL-terminated strings are in the vector). 1977 */ 1978 len = 0; 1979 upper_bound = *sizep; 1980 for (; nargv != 0 && len < upper_bound; len += xlen) { 1981 aiov.iov_base = arg; 1982 aiov.iov_len = PAGE_SIZE; 1983 auio.uio_iov = &aiov; 1984 auio.uio_iovcnt = 1; 1985 auio.uio_offset = argv + len; 1986 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1987 auio.uio_resid = xlen; 1988 auio.uio_segflg = UIO_SYSSPACE; 1989 auio.uio_rw = UIO_READ; 1990 auio.uio_procp = NULL; 1991 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1992 if (error) 1993 goto done; 1994 1995 for (i = 0; i < xlen && nargv != 0; i++) { 1996 if (arg[i] == '\0') 1997 nargv--; /* one full string */ 1998 } 1999 2000 /* 2001 * Make sure we don't copyout past the end of the user's 2002 * buffer. 2003 */ 2004 if (len + i > upper_bound) 2005 i = upper_bound - len; 2006 2007 error = copyout(arg, (char *)where + len, i); 2008 if (error) 2009 break; 2010 2011 if (nargv == 0) { 2012 len += i; 2013 break; 2014 } 2015 } 2016 *sizep = len; 2017 2018 done: 2019 uvmspace_free(p->p_vmspace); 2020 2021 free(arg, M_TEMP); 2022 return (error); 2023 } 2024 2025 #if NPTY > 0 2026 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2027 2028 /* 2029 * Validate parameters and get old / set new parameters 2030 * for pty sysctl function. 2031 */ 2032 static int 2033 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2034 { 2035 int error = 0; 2036 int oldmax = 0, newmax = 0; 2037 2038 /* get current value of maxptys */ 2039 oldmax = pty_maxptys(0, 0); 2040 2041 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2042 2043 if (!error && newp) { 2044 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2045 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2046 2047 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2048 return (EINVAL); 2049 2050 } 2051 2052 return (error); 2053 } 2054 #endif /* NPTY > 0 */ 2055 2056 static int 2057 sysctl_dotkstat(name, namelen, where, sizep, newp) 2058 int *name; 2059 u_int namelen; 2060 void *where; 2061 size_t *sizep; 2062 void *newp; 2063 { 2064 /* all sysctl names at this level are terminal */ 2065 if (namelen != 1) 2066 return (ENOTDIR); /* overloaded */ 2067 2068 switch (name[0]) { 2069 case KERN_TKSTAT_NIN: 2070 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2071 case KERN_TKSTAT_NOUT: 2072 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2073 case KERN_TKSTAT_CANCC: 2074 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2075 case KERN_TKSTAT_RAWCC: 2076 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2077 default: 2078 return (EOPNOTSUPP); 2079 } 2080 } 2081
Indexes created Tue Sep 23 14:10:03 GMT 2025