kern_sysctl.c revision 1.120
1 /* $NetBSD: kern_sysctl.c,v 1.120 2002/12/11 19:14:35 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 1.120 2002/12/11 19:14:35 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 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 380 case KERN_MAXFILES: 381 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 382 case KERN_ARGMAX: 383 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 384 case KERN_SECURELVL: 385 level = securelevel; 386 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 387 newp == NULL) 388 return (error); 389 if (level < securelevel && p->p_pid != 1) 390 return (EPERM); 391 securelevel = level; 392 return (0); 393 case KERN_HOSTNAME: 394 error = sysctl_string(oldp, oldlenp, newp, newlen, 395 hostname, sizeof(hostname)); 396 if (newp && !error) 397 hostnamelen = newlen; 398 return (error); 399 case KERN_DOMAINNAME: 400 error = sysctl_string(oldp, oldlenp, newp, newlen, 401 domainname, sizeof(domainname)); 402 if (newp && !error) 403 domainnamelen = newlen; 404 return (error); 405 case KERN_HOSTID: 406 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 407 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 408 if (newp && !error) 409 hostid = inthostid; 410 return (error); 411 case KERN_CLOCKRATE: 412 return (sysctl_clockrate(oldp, oldlenp)); 413 case KERN_BOOTTIME: 414 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 415 sizeof(struct timeval))); 416 case KERN_VNODE: 417 return (sysctl_vnode(oldp, oldlenp, p)); 418 case KERN_PROC: 419 case KERN_PROC2: 420 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 421 case KERN_PROC_ARGS: 422 return (sysctl_procargs(name + 1, namelen - 1, 423 oldp, oldlenp, p)); 424 case KERN_FILE: 425 return (sysctl_file(oldp, oldlenp)); 426 #ifdef GPROF 427 case KERN_PROF: 428 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 429 newp, newlen)); 430 #endif 431 case KERN_POSIX1: 432 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 433 case KERN_NGROUPS: 434 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 435 case KERN_JOB_CONTROL: 436 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 437 case KERN_SAVED_IDS: 438 #ifdef _POSIX_SAVED_IDS 439 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 440 #else 441 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 442 #endif 443 case KERN_MAXPARTITIONS: 444 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 445 case KERN_RAWPARTITION: 446 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 447 #ifdef NTP 448 case KERN_NTPTIME: 449 return (sysctl_ntptime(oldp, oldlenp)); 450 #endif 451 case KERN_AUTONICETIME: 452 old_autonicetime = autonicetime; 453 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 454 if (autonicetime < 0) 455 autonicetime = old_autonicetime; 456 return (error); 457 case KERN_AUTONICEVAL: 458 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 459 if (autoniceval < PRIO_MIN) 460 autoniceval = PRIO_MIN; 461 if (autoniceval > PRIO_MAX) 462 autoniceval = PRIO_MAX; 463 return (error); 464 case KERN_RTC_OFFSET: 465 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 466 case KERN_ROOT_DEVICE: 467 return (sysctl_rdstring(oldp, oldlenp, newp, 468 root_device->dv_xname)); 469 case KERN_MSGBUFSIZE: 470 /* 471 * deal with cases where the message buffer has 472 * become corrupted. 473 */ 474 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 475 msgbufenabled = 0; 476 return (ENXIO); 477 } 478 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 479 case KERN_FSYNC: 480 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 481 case KERN_SYSVMSG: 482 #ifdef SYSVMSG 483 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 484 #else 485 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 486 #endif 487 case KERN_SYSVSEM: 488 #ifdef SYSVSEM 489 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 490 #else 491 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 492 #endif 493 case KERN_SYSVSHM: 494 #ifdef SYSVSHM 495 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 496 #else 497 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 498 #endif 499 case KERN_DEFCORENAME: 500 if (newp && newlen < 1) 501 return (EINVAL); 502 error = sysctl_string(oldp, oldlenp, newp, newlen, 503 defcorename, sizeof(defcorename)); 504 if (newp && !error) 505 defcorenamelen = newlen; 506 return (error); 507 case KERN_SYNCHRONIZED_IO: 508 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 509 case KERN_IOV_MAX: 510 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 511 case KERN_MBUF: 512 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 513 newp, newlen)); 514 case KERN_MAPPED_FILES: 515 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 516 case KERN_MEMLOCK: 517 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 518 case KERN_MEMLOCK_RANGE: 519 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 520 case KERN_MEMORY_PROTECTION: 521 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 522 case KERN_LOGIN_NAME_MAX: 523 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 524 case KERN_LOGSIGEXIT: 525 return (sysctl_int(oldp, oldlenp, newp, newlen, 526 &kern_logsigexit)); 527 case KERN_FSCALE: 528 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 529 case KERN_CCPU: 530 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 531 case KERN_CP_TIME: 532 #ifndef MULTIPROCESSOR 533 return (sysctl_rdstruct(oldp, oldlenp, newp, 534 curcpu()->ci_schedstate.spc_cp_time, 535 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 536 #else 537 return (sysctl_docptime(oldp, oldlenp, newp)); 538 #endif 539 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 540 case KERN_SYSVIPC_INFO: 541 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 542 #endif 543 case KERN_MSGBUF: 544 return (sysctl_msgbuf(oldp, oldlenp)); 545 case KERN_CONSDEV: 546 if (cn_tab != NULL) 547 consdev = cn_tab->cn_dev; 548 else 549 consdev = NODEV; 550 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 551 sizeof consdev)); 552 #if NPTY > 0 553 case KERN_MAXPTYS: 554 return sysctl_pty(oldp, oldlenp, newp, newlen); 555 #endif 556 #ifndef PIPE_SOCKETPAIR 557 case KERN_PIPE: 558 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 559 newp, newlen)); 560 #endif 561 case KERN_MAXPHYS: 562 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 563 case KERN_SBMAX: 564 { 565 int new_sbmax = sb_max; 566 567 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 568 if (newp && !error) { 569 if (new_sbmax < (16 * 1024)) /* sanity */ 570 return (EINVAL); 571 sb_max = new_sbmax; 572 } 573 return (error); 574 } 575 case KERN_TKSTAT: 576 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 577 newp)); 578 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 579 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 580 case KERN_URND: 581 #if NRND > 0 582 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 583 sizeof(v)) 584 return (sysctl_rdint(oldp, oldlenp, newp, v)); 585 else 586 return (EIO); /*XXX*/ 587 #else 588 return (EOPNOTSUPP); 589 #endif 590 case KERN_LABELSECTOR: 591 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 592 case KERN_LABELOFFSET: 593 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 594 case KERN_FORKFSLEEP: 595 { 596 /* userland sees value in ms, internally is in ticks */ 597 int timo, lsleep = forkfsleep * 1000 / hz; 598 599 error = (sysctl_int(oldp, oldlenp, newp, newlen, &lsleep)); 600 if (newp && !error) { 601 /* refuse negative values, and overly 'long time' */ 602 if (lsleep < 0 || lsleep > MAXSLP * 1000) 603 return (EINVAL); 604 605 timo = mstohz(lsleep); 606 607 /* if the interval is >0 ms && <1 tick, use 1 tick */ 608 if (lsleep != 0 && timo == 0) 609 forkfsleep = 1; 610 else 611 forkfsleep = timo; 612 } 613 return (error); 614 } 615 616 default: 617 return (EOPNOTSUPP); 618 } 619 /* NOTREACHED */ 620 } 621 622 /* 623 * hardware related system variables. 624 */ 625 int 626 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 627 void *newp, size_t newlen, struct proc *p) 628 { 629 630 /* All sysctl names at this level, except for a few, are terminal. */ 631 switch (name[0]) { 632 case HW_DISKSTATS: 633 /* Not terminal. */ 634 break; 635 default: 636 if (namelen != 1) 637 return (ENOTDIR); /* overloaded */ 638 } 639 640 switch (name[0]) { 641 case HW_MACHINE: 642 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 643 case HW_MACHINE_ARCH: 644 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 645 case HW_MODEL: 646 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 647 case HW_NCPU: 648 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 649 case HW_BYTEORDER: 650 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 651 case HW_PHYSMEM: 652 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 653 case HW_USERMEM: 654 return (sysctl_rdint(oldp, oldlenp, newp, 655 ctob(physmem - uvmexp.wired))); 656 case HW_PAGESIZE: 657 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 658 case HW_ALIGNBYTES: 659 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 660 case HW_DISKNAMES: 661 return (sysctl_disknames(oldp, oldlenp)); 662 case HW_DISKSTATS: 663 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 664 case HW_CNMAGIC: { 665 char magic[CNS_LEN]; 666 int error; 667 668 if (oldp) 669 cn_get_magic(magic, CNS_LEN); 670 error = sysctl_string(oldp, oldlenp, newp, newlen, 671 magic, sizeof(magic)); 672 if (newp && !error) { 673 error = cn_set_magic(magic); 674 } 675 return (error); 676 } 677 default: 678 return (EOPNOTSUPP); 679 } 680 /* NOTREACHED */ 681 } 682 683 #ifdef DEBUG 684 /* 685 * Debugging related system variables. 686 */ 687 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 688 struct ctldebug debug5, debug6, debug7, debug8, debug9; 689 struct ctldebug debug10, debug11, debug12, debug13, debug14; 690 struct ctldebug debug15, debug16, debug17, debug18, debug19; 691 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 692 &debug0, &debug1, &debug2, &debug3, &debug4, 693 &debug5, &debug6, &debug7, &debug8, &debug9, 694 &debug10, &debug11, &debug12, &debug13, &debug14, 695 &debug15, &debug16, &debug17, &debug18, &debug19, 696 }; 697 698 int 699 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 700 void *newp, size_t newlen, struct proc *p) 701 { 702 struct ctldebug *cdp; 703 704 /* all sysctl names at this level are name and field */ 705 if (namelen != 2) 706 return (ENOTDIR); /* overloaded */ 707 if (name[0] >= CTL_DEBUG_MAXID) 708 return (EOPNOTSUPP); 709 cdp = debugvars[name[0]]; 710 if (cdp->debugname == 0) 711 return (EOPNOTSUPP); 712 switch (name[1]) { 713 case CTL_DEBUG_NAME: 714 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 715 case CTL_DEBUG_VALUE: 716 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 717 default: 718 return (EOPNOTSUPP); 719 } 720 /* NOTREACHED */ 721 } 722 #endif /* DEBUG */ 723 724 int 725 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 726 void *newp, size_t newlen, struct proc *p) 727 { 728 struct proc *ptmp = NULL; 729 const struct proclist_desc *pd; 730 int error = 0; 731 struct rlimit alim; 732 struct plimit *newplim; 733 char *tmps = NULL; 734 size_t len, curlen; 735 u_int i; 736 737 if (namelen < 2) 738 return EINVAL; 739 740 if (name[0] == PROC_CURPROC) { 741 ptmp = p; 742 } else { 743 proclist_lock_read(); 744 for (pd = proclists; pd->pd_list != NULL; pd++) { 745 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 746 ptmp = LIST_NEXT(ptmp, p_list)) { 747 /* Skip embryonic processes. */ 748 if (ptmp->p_stat == SIDL) 749 continue; 750 if (ptmp->p_pid == (pid_t)name[0]) 751 break; 752 } 753 if (ptmp != NULL) 754 break; 755 } 756 proclist_unlock_read(); 757 if (ptmp == NULL) 758 return(ESRCH); 759 if (p->p_ucred->cr_uid != 0) { 760 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 761 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 762 return EPERM; 763 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 764 return EPERM; /* sgid proc */ 765 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 766 if (p->p_ucred->cr_groups[i] == 767 ptmp->p_cred->p_rgid) 768 break; 769 } 770 if (i == p->p_ucred->cr_ngroups) 771 return EPERM; 772 } 773 } 774 switch(name[1]) { 775 case PROC_PID_STOPFORK: 776 if (namelen != 2) 777 return EINVAL; 778 i = ((ptmp->p_flag & P_STOPFORK) != 0); 779 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 780 return error; 781 if (i != 0) 782 ptmp->p_flag |= P_STOPFORK; 783 else 784 ptmp->p_flag &= ~P_STOPFORK; 785 return 0; 786 break; 787 788 case PROC_PID_STOPEXEC: 789 if (namelen != 2) 790 return EINVAL; 791 i = ((ptmp->p_flag & P_STOPEXEC) != 0); 792 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 793 return error; 794 if (i != 0) 795 ptmp->p_flag |= P_STOPEXEC; 796 else 797 ptmp->p_flag &= ~P_STOPEXEC; 798 return 0; 799 break; 800 801 case PROC_PID_CORENAME: 802 if (namelen != 2) 803 return EINVAL; 804 /* 805 * Can't use sysctl_string() here because we may malloc a new 806 * area during the process, so we have to do it by hand. 807 */ 808 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 809 if (oldlenp && *oldlenp < curlen) { 810 if (!oldp) 811 *oldlenp = curlen; 812 return (ENOMEM); 813 } 814 if (newp) { 815 if (securelevel > 2) 816 return EPERM; 817 if (newlen > MAXPATHLEN) 818 return ENAMETOOLONG; 819 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 820 if (tmps == NULL) 821 return ENOMEM; 822 error = copyin(newp, tmps, newlen + 1); 823 tmps[newlen] = '\0'; 824 if (error) 825 goto cleanup; 826 /* Enforce to be either 'core' for end with '.core' */ 827 if (newlen < 4) { /* c.o.r.e */ 828 error = EINVAL; 829 goto cleanup; 830 } 831 len = newlen - 4; 832 if (len > 0) { 833 if (tmps[len - 1] != '.' && 834 tmps[len - 1] != '/') { 835 error = EINVAL; 836 goto cleanup; 837 } 838 } 839 if (strcmp(&tmps[len], "core") != 0) { 840 error = EINVAL; 841 goto cleanup; 842 } 843 } 844 if (oldp && oldlenp) { 845 *oldlenp = curlen; 846 error = copyout(ptmp->p_limit->pl_corename, oldp, 847 curlen); 848 } 849 if (newp && error == 0) { 850 /* if the 2 strings are identical, don't limcopy() */ 851 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 852 error = 0; 853 goto cleanup; 854 } 855 if (ptmp->p_limit->p_refcnt > 1 && 856 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 857 newplim = limcopy(ptmp->p_limit); 858 limfree(ptmp->p_limit); 859 ptmp->p_limit = newplim; 860 } 861 if (ptmp->p_limit->pl_corename != defcorename) { 862 free(ptmp->p_limit->pl_corename, M_TEMP); 863 } 864 ptmp->p_limit->pl_corename = tmps; 865 return (0); 866 } 867 cleanup: 868 if (tmps) 869 free(tmps, M_TEMP); 870 return (error); 871 break; 872 873 case PROC_PID_LIMIT: 874 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 875 return EINVAL; 876 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 877 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 878 error = sysctl_quad(oldp, oldlenp, newp, newlen, 879 &alim.rlim_max); 880 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 881 error = sysctl_quad(oldp, oldlenp, newp, newlen, 882 &alim.rlim_cur); 883 else 884 error = EINVAL; 885 886 if (error) 887 return error; 888 889 if (newp) 890 error = dosetrlimit(ptmp, p->p_cred, 891 name[2] - 1, &alim); 892 return error; 893 break; 894 895 default: 896 return (EINVAL); 897 break; 898 } 899 /* NOTREACHED */ 900 return (EINVAL); 901 } 902 903 int 904 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 905 void *newp, size_t newlen, struct proc *p) 906 { 907 static struct { 908 const char *name; 909 int type; 910 } emulations[] = CTL_EMUL_NAMES; 911 const struct emul *e; 912 const char *ename; 913 #ifdef LKM 914 extern struct lock exec_lock; /* XXX */ 915 int error; 916 #else 917 extern int nexecs_builtin; 918 extern const struct execsw execsw_builtin[]; 919 int i; 920 #endif 921 922 /* all sysctl names at this level are name and field */ 923 if (namelen < 2) 924 return (ENOTDIR); /* overloaded */ 925 926 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 927 return (EOPNOTSUPP); 928 929 ename = emulations[name[0]].name; 930 931 #ifdef LKM 932 lockmgr(&exec_lock, LK_SHARED, NULL); 933 if ((e = emul_search(ename))) { 934 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 935 newp, newlen, p); 936 } else 937 error = EOPNOTSUPP; 938 lockmgr(&exec_lock, LK_RELEASE, NULL); 939 940 return (error); 941 #else 942 for (i = 0; i < nexecs_builtin; i++) { 943 e = execsw_builtin[i].es_emul; 944 /* 945 * In order to match e.g. e->e_name "irix o32" with ename "irix", 946 * we limit the comparison to the length of ename. 947 */ 948 if (e == NULL || strncmp(ename, e->e_name, strlen(ename)) != 0 || 949 e->e_sysctl == NULL) 950 continue; 951 952 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 953 newp, newlen, p); 954 } 955 956 return (EOPNOTSUPP); 957 #endif 958 } 959 /* 960 * Convenience macros. 961 */ 962 963 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 964 if (oldlenp) { \ 965 if (!oldp) \ 966 *oldlenp = len; \ 967 else { \ 968 if (*oldlenp < len) \ 969 return(ENOMEM); \ 970 *oldlenp = len; \ 971 error = copyout((caddr_t)valp, oldp, len); \ 972 } \ 973 } 974 975 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 976 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 977 978 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 979 if (newp && newlen != len) \ 980 return (EINVAL); 981 982 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 983 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 984 985 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 986 if (error == 0 && newp) \ 987 error = copyin(newp, valp, len); 988 989 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 990 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 991 992 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 993 if (oldlenp) { \ 994 len = strlen(str) + 1; \ 995 if (!oldp) \ 996 *oldlenp = len; \ 997 else { \ 998 if (*oldlenp < len) { \ 999 err2 = ENOMEM; \ 1000 len = *oldlenp; \ 1001 } else \ 1002 *oldlenp = len; \ 1003 error = copyout(str, oldp, len);\ 1004 if (error == 0) \ 1005 error = err2; \ 1006 } \ 1007 } 1008 1009 /* 1010 * Validate parameters and get old / set new parameters 1011 * for an integer-valued sysctl function. 1012 */ 1013 int 1014 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1015 { 1016 int error = 0; 1017 1018 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1019 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1020 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1021 1022 return (error); 1023 } 1024 1025 1026 /* 1027 * As above, but read-only. 1028 */ 1029 int 1030 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1031 { 1032 int error = 0; 1033 1034 if (newp) 1035 return (EPERM); 1036 1037 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1038 1039 return (error); 1040 } 1041 1042 /* 1043 * Validate parameters and get old / set new parameters 1044 * for an quad-valued sysctl function. 1045 */ 1046 int 1047 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1048 quad_t *valp) 1049 { 1050 int error = 0; 1051 1052 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1053 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1054 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1055 1056 return (error); 1057 } 1058 1059 /* 1060 * As above, but read-only. 1061 */ 1062 int 1063 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1064 { 1065 int error = 0; 1066 1067 if (newp) 1068 return (EPERM); 1069 1070 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1071 1072 return (error); 1073 } 1074 1075 /* 1076 * Validate parameters and get old / set new parameters 1077 * for a string-valued sysctl function. 1078 */ 1079 int 1080 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1081 size_t maxlen) 1082 { 1083 int error = 0, err2 = 0; 1084 size_t len; 1085 1086 if (newp && newlen >= maxlen) 1087 return (EINVAL); 1088 1089 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1090 1091 if (error == 0 && newp) { 1092 error = copyin(newp, str, newlen); 1093 str[newlen] = 0; 1094 } 1095 return (error); 1096 } 1097 1098 /* 1099 * As above, but read-only. 1100 */ 1101 int 1102 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1103 { 1104 int error = 0, err2 = 0; 1105 size_t len; 1106 1107 if (newp) 1108 return (EPERM); 1109 1110 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1111 1112 return (error); 1113 } 1114 1115 /* 1116 * Validate parameters and get old / set new parameters 1117 * for a structure oriented sysctl function. 1118 */ 1119 int 1120 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1121 size_t len) 1122 { 1123 int error = 0; 1124 1125 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1126 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1127 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1128 1129 return (error); 1130 } 1131 1132 /* 1133 * Validate parameters and get old parameters 1134 * for a structure oriented sysctl function. 1135 */ 1136 int 1137 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1138 size_t len) 1139 { 1140 int error = 0; 1141 1142 if (newp) 1143 return (EPERM); 1144 1145 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1146 1147 return (error); 1148 } 1149 1150 /* 1151 * As above, but can return a truncated result. 1152 */ 1153 int 1154 sysctl_rdminstruct(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 len = min(*oldlenp, len); 1163 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1164 1165 return (error); 1166 } 1167 1168 /* 1169 * Get file structures. 1170 */ 1171 static int 1172 sysctl_file(void *vwhere, size_t *sizep) 1173 { 1174 int error; 1175 size_t buflen; 1176 struct file *fp; 1177 char *start, *where; 1178 1179 start = where = vwhere; 1180 buflen = *sizep; 1181 if (where == NULL) { 1182 /* 1183 * overestimate by 10 files 1184 */ 1185 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1186 return (0); 1187 } 1188 1189 /* 1190 * first copyout filehead 1191 */ 1192 if (buflen < sizeof(filehead)) { 1193 *sizep = 0; 1194 return (0); 1195 } 1196 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1197 if (error) 1198 return (error); 1199 buflen -= sizeof(filehead); 1200 where += sizeof(filehead); 1201 1202 /* 1203 * followed by an array of file structures 1204 */ 1205 LIST_FOREACH(fp, &filehead, f_list) { 1206 if (buflen < sizeof(struct file)) { 1207 *sizep = where - start; 1208 return (ENOMEM); 1209 } 1210 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1211 if (error) 1212 return (error); 1213 buflen -= sizeof(struct file); 1214 where += sizeof(struct file); 1215 } 1216 *sizep = where - start; 1217 return (0); 1218 } 1219 1220 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1221 #define FILL_PERM(src, dst) do { \ 1222 (dst)._key = (src)._key; \ 1223 (dst).uid = (src).uid; \ 1224 (dst).gid = (src).gid; \ 1225 (dst).cuid = (src).cuid; \ 1226 (dst).cgid = (src).cgid; \ 1227 (dst).mode = (src).mode; \ 1228 (dst)._seq = (src)._seq; \ 1229 } while (/*CONSTCOND*/ 0); 1230 #define FILL_MSG(src, dst) do { \ 1231 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1232 (dst).msg_qnum = (src).msg_qnum; \ 1233 (dst).msg_qbytes = (src).msg_qbytes; \ 1234 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1235 (dst).msg_lspid = (src).msg_lspid; \ 1236 (dst).msg_lrpid = (src).msg_lrpid; \ 1237 (dst).msg_stime = (src).msg_stime; \ 1238 (dst).msg_rtime = (src).msg_rtime; \ 1239 (dst).msg_ctime = (src).msg_ctime; \ 1240 } while (/*CONSTCOND*/ 0) 1241 #define FILL_SEM(src, dst) do { \ 1242 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1243 (dst).sem_nsems = (src).sem_nsems; \ 1244 (dst).sem_otime = (src).sem_otime; \ 1245 (dst).sem_ctime = (src).sem_ctime; \ 1246 } while (/*CONSTCOND*/ 0) 1247 #define FILL_SHM(src, dst) do { \ 1248 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1249 (dst).shm_segsz = (src).shm_segsz; \ 1250 (dst).shm_lpid = (src).shm_lpid; \ 1251 (dst).shm_cpid = (src).shm_cpid; \ 1252 (dst).shm_atime = (src).shm_atime; \ 1253 (dst).shm_dtime = (src).shm_dtime; \ 1254 (dst).shm_ctime = (src).shm_ctime; \ 1255 (dst).shm_nattch = (src).shm_nattch; \ 1256 } while (/*CONSTCOND*/ 0) 1257 1258 static int 1259 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1260 { 1261 #ifdef SYSVMSG 1262 struct msg_sysctl_info *msgsi = NULL; 1263 #endif 1264 #ifdef SYSVSEM 1265 struct sem_sysctl_info *semsi = NULL; 1266 #endif 1267 #ifdef SYSVSHM 1268 struct shm_sysctl_info *shmsi = NULL; 1269 #endif 1270 size_t infosize, dssize, tsize, buflen; 1271 void *buf = NULL; 1272 char *start; 1273 int32_t nds; 1274 int i, error, ret; 1275 1276 if (namelen != 1) 1277 return (EINVAL); 1278 1279 start = where; 1280 buflen = *sizep; 1281 1282 switch (*name) { 1283 case KERN_SYSVIPC_MSG_INFO: 1284 #ifdef SYSVMSG 1285 infosize = sizeof(msgsi->msginfo); 1286 nds = msginfo.msgmni; 1287 dssize = sizeof(msgsi->msgids[0]); 1288 break; 1289 #else 1290 return (EINVAL); 1291 #endif 1292 case KERN_SYSVIPC_SEM_INFO: 1293 #ifdef SYSVSEM 1294 infosize = sizeof(semsi->seminfo); 1295 nds = seminfo.semmni; 1296 dssize = sizeof(semsi->semids[0]); 1297 break; 1298 #else 1299 return (EINVAL); 1300 #endif 1301 case KERN_SYSVIPC_SHM_INFO: 1302 #ifdef SYSVSHM 1303 infosize = sizeof(shmsi->shminfo); 1304 nds = shminfo.shmmni; 1305 dssize = sizeof(shmsi->shmids[0]); 1306 break; 1307 #else 1308 return (EINVAL); 1309 #endif 1310 default: 1311 return (EINVAL); 1312 } 1313 /* 1314 * Round infosize to 64 bit boundary if requesting more than just 1315 * the info structure or getting the total data size. 1316 */ 1317 if (where == NULL || *sizep > infosize) 1318 infosize = ((infosize + 7) / 8) * 8; 1319 tsize = infosize + nds * dssize; 1320 1321 /* Return just the total size required. */ 1322 if (where == NULL) { 1323 *sizep = tsize; 1324 return (0); 1325 } 1326 1327 /* Not enough room for even the info struct. */ 1328 if (buflen < infosize) { 1329 *sizep = 0; 1330 return (ENOMEM); 1331 } 1332 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1333 memset(buf, 0, min(tsize, buflen)); 1334 1335 switch (*name) { 1336 #ifdef SYSVMSG 1337 case KERN_SYSVIPC_MSG_INFO: 1338 msgsi = (struct msg_sysctl_info *)buf; 1339 msgsi->msginfo = msginfo; 1340 break; 1341 #endif 1342 #ifdef SYSVSEM 1343 case KERN_SYSVIPC_SEM_INFO: 1344 semsi = (struct sem_sysctl_info *)buf; 1345 semsi->seminfo = seminfo; 1346 break; 1347 #endif 1348 #ifdef SYSVSHM 1349 case KERN_SYSVIPC_SHM_INFO: 1350 shmsi = (struct shm_sysctl_info *)buf; 1351 shmsi->shminfo = shminfo; 1352 break; 1353 #endif 1354 } 1355 buflen -= infosize; 1356 1357 ret = 0; 1358 if (buflen > 0) { 1359 /* Fill in the IPC data structures. */ 1360 for (i = 0; i < nds; i++) { 1361 if (buflen < dssize) { 1362 ret = ENOMEM; 1363 break; 1364 } 1365 switch (*name) { 1366 #ifdef SYSVMSG 1367 case KERN_SYSVIPC_MSG_INFO: 1368 FILL_MSG(msqids[i], msgsi->msgids[i]); 1369 break; 1370 #endif 1371 #ifdef SYSVSEM 1372 case KERN_SYSVIPC_SEM_INFO: 1373 FILL_SEM(sema[i], semsi->semids[i]); 1374 break; 1375 #endif 1376 #ifdef SYSVSHM 1377 case KERN_SYSVIPC_SHM_INFO: 1378 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1379 break; 1380 #endif 1381 } 1382 buflen -= dssize; 1383 } 1384 } 1385 *sizep -= buflen; 1386 error = copyout(buf, start, *sizep); 1387 /* If copyout succeeded, use return code set earlier. */ 1388 if (error == 0) 1389 error = ret; 1390 if (buf) 1391 free(buf, M_TEMP); 1392 return (error); 1393 } 1394 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1395 1396 static int 1397 sysctl_msgbuf(void *vwhere, size_t *sizep) 1398 { 1399 char *where = vwhere; 1400 size_t len, maxlen = *sizep; 1401 long beg, end; 1402 int error; 1403 1404 /* 1405 * deal with cases where the message buffer has 1406 * become corrupted. 1407 */ 1408 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1409 msgbufenabled = 0; 1410 return (ENXIO); 1411 } 1412 1413 if (where == NULL) { 1414 /* always return full buffer size */ 1415 *sizep = msgbufp->msg_bufs; 1416 return (0); 1417 } 1418 1419 error = 0; 1420 maxlen = min(msgbufp->msg_bufs, maxlen); 1421 1422 /* 1423 * First, copy from the write pointer to the end of 1424 * message buffer. 1425 */ 1426 beg = msgbufp->msg_bufx; 1427 end = msgbufp->msg_bufs; 1428 while (maxlen > 0) { 1429 len = min(end - beg, maxlen); 1430 if (len == 0) 1431 break; 1432 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1433 if (error) 1434 break; 1435 where += len; 1436 maxlen -= len; 1437 1438 /* 1439 * ... then, copy from the beginning of message buffer to 1440 * the write pointer. 1441 */ 1442 beg = 0; 1443 end = msgbufp->msg_bufx; 1444 } 1445 return (error); 1446 } 1447 1448 /* 1449 * try over estimating by 5 procs 1450 */ 1451 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1452 1453 static int 1454 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1455 { 1456 struct eproc eproc; 1457 struct kinfo_proc2 kproc2; 1458 struct kinfo_proc *dp; 1459 struct proc *p; 1460 const struct proclist_desc *pd; 1461 char *where, *dp2; 1462 int type, op, arg; 1463 u_int elem_size, elem_count; 1464 size_t buflen, needed; 1465 int error; 1466 1467 dp = vwhere; 1468 dp2 = where = vwhere; 1469 buflen = where != NULL ? *sizep : 0; 1470 error = 0; 1471 needed = 0; 1472 type = name[0]; 1473 1474 if (type == KERN_PROC) { 1475 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1476 return (EINVAL); 1477 op = name[1]; 1478 if (op != KERN_PROC_ALL) 1479 arg = name[2]; 1480 else 1481 arg = 0; /* Quell compiler warning */ 1482 elem_size = elem_count = 0; /* Ditto */ 1483 } else { 1484 if (namelen != 5) 1485 return (EINVAL); 1486 op = name[1]; 1487 arg = name[2]; 1488 elem_size = name[3]; 1489 elem_count = name[4]; 1490 } 1491 1492 proclist_lock_read(); 1493 1494 pd = proclists; 1495 again: 1496 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1497 /* 1498 * Skip embryonic processes. 1499 */ 1500 if (p->p_stat == SIDL) 1501 continue; 1502 /* 1503 * TODO - make more efficient (see notes below). 1504 * do by session. 1505 */ 1506 switch (op) { 1507 1508 case KERN_PROC_PID: 1509 /* could do this with just a lookup */ 1510 if (p->p_pid != (pid_t)arg) 1511 continue; 1512 break; 1513 1514 case KERN_PROC_PGRP: 1515 /* could do this by traversing pgrp */ 1516 if (p->p_pgrp->pg_id != (pid_t)arg) 1517 continue; 1518 break; 1519 1520 case KERN_PROC_SESSION: 1521 if (p->p_session->s_sid != (pid_t)arg) 1522 continue; 1523 break; 1524 1525 case KERN_PROC_TTY: 1526 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1527 if ((p->p_flag & P_CONTROLT) == 0 || 1528 p->p_session->s_ttyp == NULL || 1529 p->p_session->s_ttyvp != NULL) 1530 continue; 1531 } else if ((p->p_flag & P_CONTROLT) == 0 || 1532 p->p_session->s_ttyp == NULL) { 1533 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1534 continue; 1535 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1536 continue; 1537 break; 1538 1539 case KERN_PROC_UID: 1540 if (p->p_ucred->cr_uid != (uid_t)arg) 1541 continue; 1542 break; 1543 1544 case KERN_PROC_RUID: 1545 if (p->p_cred->p_ruid != (uid_t)arg) 1546 continue; 1547 break; 1548 1549 case KERN_PROC_GID: 1550 if (p->p_ucred->cr_gid != (uid_t)arg) 1551 continue; 1552 break; 1553 1554 case KERN_PROC_RGID: 1555 if (p->p_cred->p_rgid != (uid_t)arg) 1556 continue; 1557 break; 1558 1559 case KERN_PROC_ALL: 1560 /* allow everything */ 1561 break; 1562 1563 default: 1564 error = EINVAL; 1565 goto cleanup; 1566 } 1567 if (type == KERN_PROC) { 1568 if (buflen >= sizeof(struct kinfo_proc)) { 1569 fill_eproc(p, &eproc); 1570 error = copyout((caddr_t)p, &dp->kp_proc, 1571 sizeof(struct proc)); 1572 if (error) 1573 goto cleanup; 1574 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1575 sizeof(eproc)); 1576 if (error) 1577 goto cleanup; 1578 dp++; 1579 buflen -= sizeof(struct kinfo_proc); 1580 } 1581 needed += sizeof(struct kinfo_proc); 1582 } else { /* KERN_PROC2 */ 1583 if (buflen >= elem_size && elem_count > 0) { 1584 fill_kproc2(p, &kproc2); 1585 /* 1586 * Copy out elem_size, but not larger than 1587 * the size of a struct kinfo_proc2. 1588 */ 1589 error = copyout(&kproc2, dp2, 1590 min(sizeof(kproc2), elem_size)); 1591 if (error) 1592 goto cleanup; 1593 dp2 += elem_size; 1594 buflen -= elem_size; 1595 elem_count--; 1596 } 1597 needed += elem_size; 1598 } 1599 } 1600 pd++; 1601 if (pd->pd_list != NULL) 1602 goto again; 1603 proclist_unlock_read(); 1604 1605 if (where != NULL) { 1606 if (type == KERN_PROC) 1607 *sizep = (caddr_t)dp - where; 1608 else 1609 *sizep = dp2 - where; 1610 if (needed > *sizep) 1611 return (ENOMEM); 1612 } else { 1613 needed += KERN_PROCSLOP; 1614 *sizep = needed; 1615 } 1616 return (0); 1617 cleanup: 1618 proclist_unlock_read(); 1619 return (error); 1620 } 1621 1622 /* 1623 * Fill in an eproc structure for the specified process. 1624 */ 1625 void 1626 fill_eproc(struct proc *p, struct eproc *ep) 1627 { 1628 struct tty *tp; 1629 1630 ep->e_paddr = p; 1631 ep->e_sess = p->p_session; 1632 ep->e_pcred = *p->p_cred; 1633 ep->e_ucred = *p->p_ucred; 1634 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1635 ep->e_vm.vm_rssize = 0; 1636 ep->e_vm.vm_tsize = 0; 1637 ep->e_vm.vm_dsize = 0; 1638 ep->e_vm.vm_ssize = 0; 1639 /* ep->e_vm.vm_pmap = XXX; */ 1640 } else { 1641 struct vmspace *vm = p->p_vmspace; 1642 1643 ep->e_vm.vm_rssize = vm_resident_count(vm); 1644 ep->e_vm.vm_tsize = vm->vm_tsize; 1645 ep->e_vm.vm_dsize = vm->vm_dsize; 1646 ep->e_vm.vm_ssize = vm->vm_ssize; 1647 } 1648 if (p->p_pptr) 1649 ep->e_ppid = p->p_pptr->p_pid; 1650 else 1651 ep->e_ppid = 0; 1652 ep->e_pgid = p->p_pgrp->pg_id; 1653 ep->e_sid = ep->e_sess->s_sid; 1654 ep->e_jobc = p->p_pgrp->pg_jobc; 1655 if ((p->p_flag & P_CONTROLT) && 1656 (tp = ep->e_sess->s_ttyp)) { 1657 ep->e_tdev = tp->t_dev; 1658 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1659 ep->e_tsess = tp->t_session; 1660 } else 1661 ep->e_tdev = NODEV; 1662 if (p->p_wmesg) 1663 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1664 ep->e_xsize = ep->e_xrssize = 0; 1665 ep->e_xccount = ep->e_xswrss = 0; 1666 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1667 if (SESS_LEADER(p)) 1668 ep->e_flag |= EPROC_SLEADER; 1669 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1670 } 1671 1672 /* 1673 * Fill in an eproc structure for the specified process. 1674 */ 1675 static void 1676 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1677 { 1678 struct tty *tp; 1679 1680 memset(ki, 0, sizeof(*ki)); 1681 1682 ki->p_forw = PTRTOINT64(p->p_forw); 1683 ki->p_back = PTRTOINT64(p->p_back); 1684 ki->p_paddr = PTRTOINT64(p); 1685 1686 ki->p_addr = PTRTOINT64(p->p_addr); 1687 ki->p_fd = PTRTOINT64(p->p_fd); 1688 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1689 ki->p_stats = PTRTOINT64(p->p_stats); 1690 ki->p_limit = PTRTOINT64(p->p_limit); 1691 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1692 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1693 ki->p_sess = PTRTOINT64(p->p_session); 1694 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1695 ki->p_ru = PTRTOINT64(p->p_ru); 1696 1697 ki->p_eflag = 0; 1698 ki->p_exitsig = p->p_exitsig; 1699 ki->p_flag = p->p_flag; 1700 1701 ki->p_pid = p->p_pid; 1702 if (p->p_pptr) 1703 ki->p_ppid = p->p_pptr->p_pid; 1704 else 1705 ki->p_ppid = 0; 1706 ki->p_sid = p->p_session->s_sid; 1707 ki->p__pgid = p->p_pgrp->pg_id; 1708 1709 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1710 1711 ki->p_uid = p->p_ucred->cr_uid; 1712 ki->p_ruid = p->p_cred->p_ruid; 1713 ki->p_gid = p->p_ucred->cr_gid; 1714 ki->p_rgid = p->p_cred->p_rgid; 1715 1716 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1717 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1718 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1719 1720 ki->p_jobc = p->p_pgrp->pg_jobc; 1721 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1722 ki->p_tdev = tp->t_dev; 1723 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1724 ki->p_tsess = PTRTOINT64(tp->t_session); 1725 } else { 1726 ki->p_tdev = NODEV; 1727 } 1728 1729 ki->p_estcpu = p->p_estcpu; 1730 ki->p_rtime_sec = p->p_rtime.tv_sec; 1731 ki->p_rtime_usec = p->p_rtime.tv_usec; 1732 ki->p_cpticks = p->p_cpticks; 1733 ki->p_pctcpu = p->p_pctcpu; 1734 ki->p_swtime = p->p_swtime; 1735 ki->p_slptime = p->p_slptime; 1736 if (p->p_stat == SONPROC) { 1737 KDASSERT(p->p_cpu != NULL); 1738 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1739 } else 1740 ki->p_schedflags = 0; 1741 1742 ki->p_uticks = p->p_uticks; 1743 ki->p_sticks = p->p_sticks; 1744 ki->p_iticks = p->p_iticks; 1745 1746 ki->p_tracep = PTRTOINT64(p->p_tracep); 1747 ki->p_traceflag = p->p_traceflag; 1748 1749 ki->p_holdcnt = p->p_holdcnt; 1750 1751 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1752 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1753 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1754 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1755 1756 ki->p_stat = p->p_stat; 1757 ki->p_priority = p->p_priority; 1758 ki->p_usrpri = p->p_usrpri; 1759 ki->p_nice = p->p_nice; 1760 1761 ki->p_xstat = p->p_xstat; 1762 ki->p_acflag = p->p_acflag; 1763 1764 strncpy(ki->p_comm, p->p_comm, 1765 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1766 1767 if (p->p_wmesg) 1768 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1769 ki->p_wchan = PTRTOINT64(p->p_wchan); 1770 1771 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1772 1773 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1774 ki->p_vm_rssize = 0; 1775 ki->p_vm_tsize = 0; 1776 ki->p_vm_dsize = 0; 1777 ki->p_vm_ssize = 0; 1778 } else { 1779 struct vmspace *vm = p->p_vmspace; 1780 1781 ki->p_vm_rssize = vm_resident_count(vm); 1782 ki->p_vm_tsize = vm->vm_tsize; 1783 ki->p_vm_dsize = vm->vm_dsize; 1784 ki->p_vm_ssize = vm->vm_ssize; 1785 } 1786 1787 if (p->p_session->s_ttyvp) 1788 ki->p_eflag |= EPROC_CTTY; 1789 if (SESS_LEADER(p)) 1790 ki->p_eflag |= EPROC_SLEADER; 1791 1792 /* XXX Is this double check necessary? */ 1793 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1794 ki->p_uvalid = 0; 1795 } else { 1796 ki->p_uvalid = 1; 1797 1798 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1799 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1800 1801 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1802 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1803 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1804 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1805 1806 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1807 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1808 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1809 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1810 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1811 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1812 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1813 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1814 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1815 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1816 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1817 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1818 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1819 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1820 1821 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1822 p->p_stats->p_cru.ru_stime.tv_sec; 1823 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1824 p->p_stats->p_cru.ru_stime.tv_usec; 1825 } 1826 #ifdef MULTIPROCESSOR 1827 if (p->p_cpu != NULL) 1828 ki->p_cpuid = p->p_cpu->ci_cpuid; 1829 else 1830 #endif 1831 ki->p_cpuid = KI_NOCPU; 1832 } 1833 1834 int 1835 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1836 struct proc *up) 1837 { 1838 struct ps_strings pss; 1839 struct proc *p; 1840 size_t len, upper_bound, xlen, i; 1841 struct uio auio; 1842 struct iovec aiov; 1843 vaddr_t argv; 1844 pid_t pid; 1845 int nargv, type, error; 1846 char *arg; 1847 char *tmp; 1848 1849 if (namelen != 2) 1850 return (EINVAL); 1851 pid = name[0]; 1852 type = name[1]; 1853 1854 switch (type) { 1855 case KERN_PROC_ARGV: 1856 case KERN_PROC_NARGV: 1857 case KERN_PROC_ENV: 1858 case KERN_PROC_NENV: 1859 /* ok */ 1860 break; 1861 default: 1862 return (EINVAL); 1863 } 1864 1865 /* check pid */ 1866 if ((p = pfind(pid)) == NULL) 1867 return (EINVAL); 1868 1869 /* only root or same user change look at the environment */ 1870 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1871 if (up->p_ucred->cr_uid != 0) { 1872 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1873 up->p_cred->p_ruid != p->p_cred->p_svuid) 1874 return (EPERM); 1875 } 1876 } 1877 1878 if (sizep != NULL && where == NULL) { 1879 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1880 *sizep = sizeof (int); 1881 else 1882 *sizep = ARG_MAX; /* XXX XXX XXX */ 1883 return (0); 1884 } 1885 if (where == NULL || sizep == NULL) 1886 return (EINVAL); 1887 1888 /* 1889 * Zombies don't have a stack, so we can't read their psstrings. 1890 * System processes also don't have a user stack. 1891 */ 1892 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1893 return (EINVAL); 1894 1895 /* 1896 * Lock the process down in memory. 1897 */ 1898 /* XXXCDC: how should locking work here? */ 1899 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1900 return (EFAULT); 1901 p->p_vmspace->vm_refcnt++; /* XXX */ 1902 1903 /* 1904 * Allocate a temporary buffer to hold the arguments. 1905 */ 1906 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1907 1908 /* 1909 * Read in the ps_strings structure. 1910 */ 1911 aiov.iov_base = &pss; 1912 aiov.iov_len = sizeof(pss); 1913 auio.uio_iov = &aiov; 1914 auio.uio_iovcnt = 1; 1915 auio.uio_offset = (vaddr_t)p->p_psstr; 1916 auio.uio_resid = sizeof(pss); 1917 auio.uio_segflg = UIO_SYSSPACE; 1918 auio.uio_rw = UIO_READ; 1919 auio.uio_procp = NULL; 1920 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1921 if (error) 1922 goto done; 1923 1924 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1925 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1926 else 1927 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1928 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1929 error = copyout(&nargv, where, sizeof(nargv)); 1930 *sizep = sizeof(nargv); 1931 goto done; 1932 } 1933 /* 1934 * Now read the address of the argument vector. 1935 */ 1936 switch (type) { 1937 case KERN_PROC_ARGV: 1938 /* XXX compat32 stuff here */ 1939 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1940 break; 1941 case KERN_PROC_ENV: 1942 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1943 break; 1944 default: 1945 return (EINVAL); 1946 } 1947 auio.uio_offset = (off_t)(long)tmp; 1948 aiov.iov_base = &argv; 1949 aiov.iov_len = sizeof(argv); 1950 auio.uio_iov = &aiov; 1951 auio.uio_iovcnt = 1; 1952 auio.uio_resid = sizeof(argv); 1953 auio.uio_segflg = UIO_SYSSPACE; 1954 auio.uio_rw = UIO_READ; 1955 auio.uio_procp = NULL; 1956 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1957 if (error) 1958 goto done; 1959 1960 /* 1961 * Now copy in the actual argument vector, one page at a time, 1962 * since we don't know how long the vector is (though, we do 1963 * know how many NUL-terminated strings are in the vector). 1964 */ 1965 len = 0; 1966 upper_bound = *sizep; 1967 for (; nargv != 0 && len < upper_bound; len += xlen) { 1968 aiov.iov_base = arg; 1969 aiov.iov_len = PAGE_SIZE; 1970 auio.uio_iov = &aiov; 1971 auio.uio_iovcnt = 1; 1972 auio.uio_offset = argv + len; 1973 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1974 auio.uio_resid = xlen; 1975 auio.uio_segflg = UIO_SYSSPACE; 1976 auio.uio_rw = UIO_READ; 1977 auio.uio_procp = NULL; 1978 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1979 if (error) 1980 goto done; 1981 1982 for (i = 0; i < xlen && nargv != 0; i++) { 1983 if (arg[i] == '\0') 1984 nargv--; /* one full string */ 1985 } 1986 1987 /* 1988 * Make sure we don't copyout past the end of the user's 1989 * buffer. 1990 */ 1991 if (len + i > upper_bound) 1992 i = upper_bound - len; 1993 1994 error = copyout(arg, (char *)where + len, i); 1995 if (error) 1996 break; 1997 1998 if (nargv == 0) { 1999 len += i; 2000 break; 2001 } 2002 } 2003 *sizep = len; 2004 2005 done: 2006 uvmspace_free(p->p_vmspace); 2007 2008 free(arg, M_TEMP); 2009 return (error); 2010 } 2011 2012 #if NPTY > 0 2013 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2014 2015 /* 2016 * Validate parameters and get old / set new parameters 2017 * for pty sysctl function. 2018 */ 2019 static int 2020 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2021 { 2022 int error = 0; 2023 int oldmax = 0, newmax = 0; 2024 2025 /* get current value of maxptys */ 2026 oldmax = pty_maxptys(0, 0); 2027 2028 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2029 2030 if (!error && newp) { 2031 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2032 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2033 2034 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2035 return (EINVAL); 2036 2037 } 2038 2039 return (error); 2040 } 2041 #endif /* NPTY > 0 */ 2042 2043 static int 2044 sysctl_dotkstat(name, namelen, where, sizep, newp) 2045 int *name; 2046 u_int namelen; 2047 void *where; 2048 size_t *sizep; 2049 void *newp; 2050 { 2051 /* all sysctl names at this level are terminal */ 2052 if (namelen != 1) 2053 return (ENOTDIR); /* overloaded */ 2054 2055 switch (name[0]) { 2056 case KERN_TKSTAT_NIN: 2057 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2058 case KERN_TKSTAT_NOUT: 2059 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2060 case KERN_TKSTAT_CANCC: 2061 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2062 case KERN_TKSTAT_RAWCC: 2063 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2064 default: 2065 return (EOPNOTSUPP); 2066 } 2067 } 2068
Indexes created Mon Sep 22 05:09:51 GMT 2025