kern_sysctl.c revision 1.86.2.24
1 /* $NetBSD: kern_sysctl.c,v 1.86.2.24 2002/11/11 22:13:52 nathanw Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95 39 */ 40 41 /* 42 * sysctl system call. 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: kern_sysctl.c,v 1.86.2.24 2002/11/11 22:13:52 nathanw Exp $"); 47 48 #include "opt_ddb.h" 49 #include "opt_insecure.h" 50 #include "opt_defcorename.h" 51 #include "opt_pipe.h" 52 #include "opt_sysv.h" 53 #include "pty.h" 54 #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/sa.h> 74 #include <sys/syscallargs.h> 75 #include <sys/tty.h> 76 #include <sys/unistd.h> 77 #include <sys/vnode.h> 78 #include <sys/socketvar.h> 79 #define __SYSCTL_PRIVATE 80 #include <sys/sysctl.h> 81 #include <sys/lock.h> 82 #include <sys/namei.h> 83 84 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 85 #include <sys/ipc.h> 86 #endif 87 #ifdef SYSVMSG 88 #include <sys/msg.h> 89 #endif 90 #ifdef SYSVSEM 91 #include <sys/sem.h> 92 #endif 93 #ifdef SYSVSHM 94 #include <sys/shm.h> 95 #endif 96 97 #include <dev/cons.h> 98 99 #if defined(DDB) 100 #include <ddb/ddbvar.h> 101 #endif 102 103 #ifndef PIPE_SOCKETPAIR 104 #include <sys/pipe.h> 105 #endif 106 107 #if NRND > 0 108 #include <sys/rnd.h> 109 #endif 110 111 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 112 113 static int sysctl_file(void *, size_t *); 114 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 115 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 116 #endif 117 static int sysctl_msgbuf(void *, size_t *); 118 static int sysctl_doeproc(int *, u_int, void *, size_t *); 119 static int sysctl_dolwp(int *, u_int, void *, size_t *); 120 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 121 #ifdef MULTIPROCESSOR 122 static int sysctl_docptime(void *, size_t *, void *); 123 static int sysctl_ncpus(void); 124 #endif 125 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 126 static void fill_lwp(struct lwp *, struct kinfo_lwp *); 127 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 128 #if NPTY > 0 129 static int sysctl_pty(void *, size_t *, void *, size_t); 130 #endif 131 132 /* 133 * The `sysctl_memlock' is intended to keep too many processes from 134 * locking down memory by doing sysctls at once. Whether or not this 135 * is really a good idea to worry about it probably a subject of some 136 * debate. 137 */ 138 struct lock sysctl_memlock; 139 140 void 141 sysctl_init(void) 142 { 143 144 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 145 } 146 147 int 148 sys___sysctl(struct lwp *l, void *v, register_t *retval) 149 { 150 struct sys___sysctl_args /* { 151 syscallarg(int *) name; 152 syscallarg(u_int) namelen; 153 syscallarg(void *) old; 154 syscallarg(size_t *) oldlenp; 155 syscallarg(void *) new; 156 syscallarg(size_t) newlen; 157 } */ *uap = v; 158 struct proc *p = l->l_proc; 159 int error; 160 size_t savelen = 0, oldlen = 0; 161 sysctlfn *fn; 162 int name[CTL_MAXNAME]; 163 size_t *oldlenp; 164 165 /* 166 * all top-level sysctl names are non-terminal 167 */ 168 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 169 return (EINVAL); 170 error = copyin(SCARG(uap, name), &name, 171 SCARG(uap, namelen) * sizeof(int)); 172 if (error) 173 return (error); 174 175 /* 176 * For all but CTL_PROC, must be root to change a value. 177 * For CTL_PROC, must be root, or owner of the proc (and not suid), 178 * this is checked in proc_sysctl() (once we know the targer proc). 179 */ 180 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 181 (error = suser(p->p_ucred, &p->p_acflag))) 182 return error; 183 184 switch (name[0]) { 185 case CTL_KERN: 186 fn = kern_sysctl; 187 break; 188 case CTL_HW: 189 fn = hw_sysctl; 190 break; 191 case CTL_VM: 192 fn = uvm_sysctl; 193 break; 194 case CTL_NET: 195 fn = net_sysctl; 196 break; 197 case CTL_VFS: 198 fn = vfs_sysctl; 199 break; 200 case CTL_MACHDEP: 201 fn = cpu_sysctl; 202 break; 203 #ifdef DEBUG 204 case CTL_DEBUG: 205 fn = debug_sysctl; 206 break; 207 #endif 208 #ifdef DDB 209 case CTL_DDB: 210 fn = ddb_sysctl; 211 break; 212 #endif 213 case CTL_PROC: 214 fn = proc_sysctl; 215 break; 216 217 case CTL_EMUL: 218 fn = emul_sysctl; 219 break; 220 default: 221 return (EOPNOTSUPP); 222 } 223 224 /* 225 * XXX Hey, we wire `old', but what about `new'? 226 */ 227 228 oldlenp = SCARG(uap, oldlenp); 229 if (oldlenp) { 230 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 231 return (error); 232 oldlenp = &oldlen; 233 } 234 if (SCARG(uap, old) != NULL) { 235 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 236 if (error) 237 return (error); 238 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 239 if (error) { 240 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 241 return error; 242 } 243 savelen = oldlen; 244 } 245 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 246 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 247 if (SCARG(uap, old) != NULL) { 248 uvm_vsunlock(p, SCARG(uap, old), savelen); 249 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 250 } 251 if (error) 252 return (error); 253 if (SCARG(uap, oldlenp)) 254 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 255 return (error); 256 } 257 258 /* 259 * Attributes stored in the kernel. 260 */ 261 char hostname[MAXHOSTNAMELEN]; 262 int hostnamelen; 263 264 char domainname[MAXHOSTNAMELEN]; 265 int domainnamelen; 266 267 long hostid; 268 269 #ifdef INSECURE 270 int securelevel = -1; 271 #else 272 int securelevel = 0; 273 #endif 274 275 #ifndef DEFCORENAME 276 #define DEFCORENAME "%n.core" 277 #endif 278 char defcorename[MAXPATHLEN] = DEFCORENAME; 279 int defcorenamelen = sizeof(DEFCORENAME); 280 281 extern int kern_logsigexit; 282 extern fixpt_t ccpu; 283 284 #ifndef MULTIPROCESSOR 285 #define sysctl_ncpus() 1 286 #endif 287 288 #ifdef MULTIPROCESSOR 289 290 #ifndef CPU_INFO_FOREACH 291 #define CPU_INFO_ITERATOR int 292 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 293 #endif 294 295 static int 296 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 297 { 298 u_int64_t cp_time[CPUSTATES]; 299 int i; 300 struct cpu_info *ci; 301 CPU_INFO_ITERATOR cii; 302 303 for (i=0; i<CPUSTATES; i++) 304 cp_time[i] = 0; 305 306 for (CPU_INFO_FOREACH(cii, ci)) { 307 for (i=0; i<CPUSTATES; i++) 308 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 309 } 310 return (sysctl_rdstruct(oldp, oldlenp, newp, 311 cp_time, sizeof(cp_time))); 312 } 313 314 static int 315 sysctl_ncpus(void) 316 { 317 struct cpu_info *ci; 318 CPU_INFO_ITERATOR cii; 319 320 int ncpus = 0; 321 for (CPU_INFO_FOREACH(cii, ci)) 322 ncpus++; 323 return ncpus; 324 } 325 326 #endif 327 328 /* 329 * kernel related system variables. 330 */ 331 int 332 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 333 void *newp, size_t newlen, struct proc *p) 334 { 335 int error, level, inthostid; 336 int old_autonicetime; 337 int old_vnodes; 338 dev_t consdev; 339 #if NRND > 0 340 int v; 341 #endif 342 343 /* All sysctl names at this level, except for a few, are terminal. */ 344 switch (name[0]) { 345 case KERN_PROC: 346 case KERN_PROC2: 347 case KERN_LWP: 348 case KERN_PROF: 349 case KERN_MBUF: 350 case KERN_PROC_ARGS: 351 case KERN_SYSVIPC_INFO: 352 case KERN_PIPE: 353 case KERN_TKSTAT: 354 /* Not terminal. */ 355 break; 356 default: 357 if (namelen != 1) 358 return (ENOTDIR); /* overloaded */ 359 } 360 361 switch (name[0]) { 362 case KERN_OSTYPE: 363 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 364 case KERN_OSRELEASE: 365 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 366 case KERN_OSREV: 367 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 368 case KERN_VERSION: 369 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 370 case KERN_MAXVNODES: 371 old_vnodes = desiredvnodes; 372 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 373 if (newp && !error) { 374 if (old_vnodes > desiredvnodes) { 375 desiredvnodes = old_vnodes; 376 return (EINVAL); 377 } 378 vfs_reinit(); 379 nchreinit(); 380 } 381 return (error); 382 case KERN_MAXPROC: 383 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 384 case KERN_MAXFILES: 385 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 386 case KERN_ARGMAX: 387 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 388 case KERN_SECURELVL: 389 level = securelevel; 390 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 391 newp == NULL) 392 return (error); 393 if (level < securelevel && p->p_pid != 1) 394 return (EPERM); 395 securelevel = level; 396 return (0); 397 case KERN_HOSTNAME: 398 error = sysctl_string(oldp, oldlenp, newp, newlen, 399 hostname, sizeof(hostname)); 400 if (newp && !error) 401 hostnamelen = newlen; 402 return (error); 403 case KERN_DOMAINNAME: 404 error = sysctl_string(oldp, oldlenp, newp, newlen, 405 domainname, sizeof(domainname)); 406 if (newp && !error) 407 domainnamelen = newlen; 408 return (error); 409 case KERN_HOSTID: 410 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 411 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 412 if (newp && !error) 413 hostid = inthostid; 414 return (error); 415 case KERN_CLOCKRATE: 416 return (sysctl_clockrate(oldp, oldlenp)); 417 case KERN_BOOTTIME: 418 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 419 sizeof(struct timeval))); 420 case KERN_VNODE: 421 return (sysctl_vnode(oldp, oldlenp, p)); 422 case KERN_PROC: 423 case KERN_PROC2: 424 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 425 case KERN_LWP: 426 return (sysctl_dolwp(name, namelen, oldp, oldlenp)); 427 case KERN_PROC_ARGS: 428 return (sysctl_procargs(name + 1, namelen - 1, 429 oldp, oldlenp, p)); 430 case KERN_FILE: 431 return (sysctl_file(oldp, oldlenp)); 432 #ifdef GPROF 433 case KERN_PROF: 434 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 435 newp, newlen)); 436 #endif 437 case KERN_POSIX1: 438 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 439 case KERN_NGROUPS: 440 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 441 case KERN_JOB_CONTROL: 442 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 443 case KERN_SAVED_IDS: 444 #ifdef _POSIX_SAVED_IDS 445 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 446 #else 447 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 448 #endif 449 case KERN_MAXPARTITIONS: 450 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 451 case KERN_RAWPARTITION: 452 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 453 #ifdef NTP 454 case KERN_NTPTIME: 455 return (sysctl_ntptime(oldp, oldlenp)); 456 #endif 457 case KERN_AUTONICETIME: 458 old_autonicetime = autonicetime; 459 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 460 if (autonicetime < 0) 461 autonicetime = old_autonicetime; 462 return (error); 463 case KERN_AUTONICEVAL: 464 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 465 if (autoniceval < PRIO_MIN) 466 autoniceval = PRIO_MIN; 467 if (autoniceval > PRIO_MAX) 468 autoniceval = PRIO_MAX; 469 return (error); 470 case KERN_RTC_OFFSET: 471 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 472 case KERN_ROOT_DEVICE: 473 return (sysctl_rdstring(oldp, oldlenp, newp, 474 root_device->dv_xname)); 475 case KERN_MSGBUFSIZE: 476 /* 477 * deal with cases where the message buffer has 478 * become corrupted. 479 */ 480 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 481 msgbufenabled = 0; 482 return (ENXIO); 483 } 484 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 485 case KERN_FSYNC: 486 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 487 case KERN_SYSVMSG: 488 #ifdef SYSVMSG 489 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 490 #else 491 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 492 #endif 493 case KERN_SYSVSEM: 494 #ifdef SYSVSEM 495 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 496 #else 497 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 498 #endif 499 case KERN_SYSVSHM: 500 #ifdef SYSVSHM 501 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 502 #else 503 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 504 #endif 505 case KERN_DEFCORENAME: 506 if (newp && newlen < 1) 507 return (EINVAL); 508 error = sysctl_string(oldp, oldlenp, newp, newlen, 509 defcorename, sizeof(defcorename)); 510 if (newp && !error) 511 defcorenamelen = newlen; 512 return (error); 513 case KERN_SYNCHRONIZED_IO: 514 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 515 case KERN_IOV_MAX: 516 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 517 case KERN_MBUF: 518 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 519 newp, newlen)); 520 case KERN_MAPPED_FILES: 521 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 522 case KERN_MEMLOCK: 523 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 524 case KERN_MEMLOCK_RANGE: 525 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 526 case KERN_MEMORY_PROTECTION: 527 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 528 case KERN_LOGIN_NAME_MAX: 529 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 530 case KERN_LOGSIGEXIT: 531 return (sysctl_int(oldp, oldlenp, newp, newlen, 532 &kern_logsigexit)); 533 case KERN_FSCALE: 534 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 535 case KERN_CCPU: 536 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 537 case KERN_CP_TIME: 538 #ifndef MULTIPROCESSOR 539 return (sysctl_rdstruct(oldp, oldlenp, newp, 540 curcpu()->ci_schedstate.spc_cp_time, 541 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 542 #else 543 return (sysctl_docptime(oldp, oldlenp, newp)); 544 #endif 545 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 546 case KERN_SYSVIPC_INFO: 547 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 548 #endif 549 case KERN_MSGBUF: 550 return (sysctl_msgbuf(oldp, oldlenp)); 551 case KERN_CONSDEV: 552 if (cn_tab != NULL) 553 consdev = cn_tab->cn_dev; 554 else 555 consdev = NODEV; 556 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 557 sizeof consdev)); 558 #if NPTY > 0 559 case KERN_MAXPTYS: 560 return sysctl_pty(oldp, oldlenp, newp, newlen); 561 #endif 562 #ifndef PIPE_SOCKETPAIR 563 case KERN_PIPE: 564 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 565 newp, newlen)); 566 #endif 567 case KERN_MAXPHYS: 568 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 569 case KERN_SBMAX: 570 { 571 int new_sbmax = sb_max; 572 573 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 574 if (newp && !error) { 575 if (new_sbmax < (16 * 1024)) /* sanity */ 576 return (EINVAL); 577 sb_max = new_sbmax; 578 } 579 return (error); 580 } 581 case KERN_TKSTAT: 582 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 583 newp)); 584 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 585 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 586 case KERN_URND: 587 #if NRND > 0 588 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 589 sizeof(v)) 590 return (sysctl_rdint(oldp, oldlenp, newp, v)); 591 else 592 return (EIO); /*XXX*/ 593 #else 594 return (EOPNOTSUPP); 595 #endif 596 default: 597 return (EOPNOTSUPP); 598 } 599 /* NOTREACHED */ 600 } 601 602 /* 603 * hardware related system variables. 604 */ 605 int 606 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 607 void *newp, size_t newlen, struct proc *p) 608 { 609 610 /* All sysctl names at this level, except for a few, are terminal. */ 611 switch (name[0]) { 612 case HW_DISKSTATS: 613 /* Not terminal. */ 614 break; 615 default: 616 if (namelen != 1) 617 return (ENOTDIR); /* overloaded */ 618 } 619 620 switch (name[0]) { 621 case HW_MACHINE: 622 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 623 case HW_MACHINE_ARCH: 624 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 625 case HW_MODEL: 626 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 627 case HW_NCPU: 628 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 629 case HW_BYTEORDER: 630 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 631 case HW_PHYSMEM: 632 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 633 case HW_USERMEM: 634 return (sysctl_rdint(oldp, oldlenp, newp, 635 ctob(physmem - uvmexp.wired))); 636 case HW_PAGESIZE: 637 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 638 case HW_ALIGNBYTES: 639 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 640 case HW_DISKNAMES: 641 return (sysctl_disknames(oldp, oldlenp)); 642 case HW_DISKSTATS: 643 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 644 case HW_CNMAGIC: { 645 char magic[CNS_LEN]; 646 int error; 647 648 if (oldp) 649 cn_get_magic(magic, CNS_LEN); 650 error = sysctl_string(oldp, oldlenp, newp, newlen, 651 magic, sizeof(magic)); 652 if (newp && !error) { 653 error = cn_set_magic(magic); 654 } 655 return (error); 656 } 657 default: 658 return (EOPNOTSUPP); 659 } 660 /* NOTREACHED */ 661 } 662 663 #ifdef DEBUG 664 /* 665 * Debugging related system variables. 666 */ 667 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 668 struct ctldebug debug5, debug6, debug7, debug8, debug9; 669 struct ctldebug debug10, debug11, debug12, debug13, debug14; 670 struct ctldebug debug15, debug16, debug17, debug18, debug19; 671 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 672 &debug0, &debug1, &debug2, &debug3, &debug4, 673 &debug5, &debug6, &debug7, &debug8, &debug9, 674 &debug10, &debug11, &debug12, &debug13, &debug14, 675 &debug15, &debug16, &debug17, &debug18, &debug19, 676 }; 677 678 int 679 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 680 void *newp, size_t newlen, struct proc *p) 681 { 682 struct ctldebug *cdp; 683 684 /* all sysctl names at this level are name and field */ 685 if (namelen != 2) 686 return (ENOTDIR); /* overloaded */ 687 if (name[0] >= CTL_DEBUG_MAXID) 688 return (EOPNOTSUPP); 689 cdp = debugvars[name[0]]; 690 if (cdp->debugname == 0) 691 return (EOPNOTSUPP); 692 switch (name[1]) { 693 case CTL_DEBUG_NAME: 694 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 695 case CTL_DEBUG_VALUE: 696 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 697 default: 698 return (EOPNOTSUPP); 699 } 700 /* NOTREACHED */ 701 } 702 #endif /* DEBUG */ 703 704 int 705 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 706 void *newp, size_t newlen, struct proc *p) 707 { 708 struct proc *ptmp = NULL; 709 const struct proclist_desc *pd; 710 int error = 0; 711 struct rlimit alim; 712 struct plimit *newplim; 713 char *tmps = NULL; 714 size_t len, curlen; 715 u_int i; 716 717 if (namelen < 2) 718 return EINVAL; 719 720 if (name[0] == PROC_CURPROC) { 721 ptmp = p; 722 } else { 723 proclist_lock_read(); 724 for (pd = proclists; pd->pd_list != NULL; pd++) { 725 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 726 ptmp = LIST_NEXT(ptmp, p_list)) { 727 /* Skip embryonic processes. */ 728 if (ptmp->p_stat == SIDL) 729 continue; 730 if (ptmp->p_pid == (pid_t)name[0]) 731 break; 732 } 733 if (ptmp != NULL) 734 break; 735 } 736 proclist_unlock_read(); 737 if (ptmp == NULL) 738 return(ESRCH); 739 if (p->p_ucred->cr_uid != 0) { 740 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 741 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 742 return EPERM; 743 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 744 return EPERM; /* sgid proc */ 745 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 746 if (p->p_ucred->cr_groups[i] == 747 ptmp->p_cred->p_rgid) 748 break; 749 } 750 if (i == p->p_ucred->cr_ngroups) 751 return EPERM; 752 } 753 } 754 switch(name[1]) { 755 case PROC_PID_STOPFORK: 756 if (namelen != 2) 757 return EINVAL; 758 i = ((ptmp->p_flag & P_STOPFORK) != 0); 759 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 760 return error; 761 if (i != 0) 762 ptmp->p_flag |= P_STOPFORK; 763 else 764 ptmp->p_flag &= ~P_STOPFORK; 765 return 0; 766 break; 767 768 case PROC_PID_STOPEXEC: 769 if (namelen != 2) 770 return EINVAL; 771 i = ((ptmp->p_flag & P_STOPEXEC) != 0); 772 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 773 return error; 774 if (i != 0) 775 ptmp->p_flag |= P_STOPEXEC; 776 else 777 ptmp->p_flag &= ~P_STOPEXEC; 778 return 0; 779 break; 780 781 case PROC_PID_CORENAME: 782 if (namelen != 2) 783 return EINVAL; 784 /* 785 * Can't use sysctl_string() here because we may malloc a new 786 * area during the process, so we have to do it by hand. 787 */ 788 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 789 if (oldlenp && *oldlenp < curlen) { 790 if (!oldp) 791 *oldlenp = curlen; 792 return (ENOMEM); 793 } 794 if (newp) { 795 if (securelevel > 2) 796 return EPERM; 797 if (newlen > MAXPATHLEN) 798 return ENAMETOOLONG; 799 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 800 if (tmps == NULL) 801 return ENOMEM; 802 error = copyin(newp, tmps, newlen + 1); 803 tmps[newlen] = '\0'; 804 if (error) 805 goto cleanup; 806 /* Enforce to be either 'core' for end with '.core' */ 807 if (newlen < 4) { /* c.o.r.e */ 808 error = EINVAL; 809 goto cleanup; 810 } 811 len = newlen - 4; 812 if (len > 0) { 813 if (tmps[len - 1] != '.' && 814 tmps[len - 1] != '/') { 815 error = EINVAL; 816 goto cleanup; 817 } 818 } 819 if (strcmp(&tmps[len], "core") != 0) { 820 error = EINVAL; 821 goto cleanup; 822 } 823 } 824 if (oldp && oldlenp) { 825 *oldlenp = curlen; 826 error = copyout(ptmp->p_limit->pl_corename, oldp, 827 curlen); 828 } 829 if (newp && error == 0) { 830 /* if the 2 strings are identical, don't limcopy() */ 831 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 832 error = 0; 833 goto cleanup; 834 } 835 if (ptmp->p_limit->p_refcnt > 1 && 836 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 837 newplim = limcopy(ptmp->p_limit); 838 limfree(ptmp->p_limit); 839 ptmp->p_limit = newplim; 840 } 841 if (ptmp->p_limit->pl_corename != defcorename) { 842 free(ptmp->p_limit->pl_corename, M_TEMP); 843 } 844 ptmp->p_limit->pl_corename = tmps; 845 return (0); 846 } 847 cleanup: 848 if (tmps) 849 free(tmps, M_TEMP); 850 return (error); 851 break; 852 853 case PROC_PID_LIMIT: 854 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 855 return EINVAL; 856 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 857 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 858 error = sysctl_quad(oldp, oldlenp, newp, newlen, 859 &alim.rlim_max); 860 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 861 error = sysctl_quad(oldp, oldlenp, newp, newlen, 862 &alim.rlim_cur); 863 else 864 error = EINVAL; 865 866 if (error) 867 return error; 868 869 if (newp) 870 error = dosetrlimit(ptmp, p->p_cred, 871 name[2] - 1, &alim); 872 return error; 873 break; 874 875 default: 876 return (EINVAL); 877 break; 878 } 879 /* NOTREACHED */ 880 return (EINVAL); 881 } 882 883 int 884 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 885 void *newp, size_t newlen, struct proc *p) 886 { 887 static struct { 888 const char *name; 889 int type; 890 } emulations[] = CTL_EMUL_NAMES; 891 const struct emul *e; 892 const char *ename; 893 #ifdef LKM 894 extern struct lock exec_lock; /* XXX */ 895 int error; 896 #else 897 extern int nexecs_builtin; 898 extern const struct execsw execsw_builtin[]; 899 int i; 900 #endif 901 902 /* all sysctl names at this level are name and field */ 903 if (namelen < 2) 904 return (ENOTDIR); /* overloaded */ 905 906 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 907 return (EOPNOTSUPP); 908 909 ename = emulations[name[0]].name; 910 911 #ifdef LKM 912 lockmgr(&exec_lock, LK_SHARED, NULL); 913 if ((e = emul_search(ename))) { 914 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 915 newp, newlen, p); 916 } else 917 error = EOPNOTSUPP; 918 lockmgr(&exec_lock, LK_RELEASE, NULL); 919 920 return (error); 921 #else 922 for (i = 0; i < nexecs_builtin; i++) { 923 e = execsw_builtin[i].es_emul; 924 /* 925 * In order to match e.g. e->e_name "irix o32" with ename "irix", 926 * we limit the comparison to the length of ename. 927 */ 928 if (e == NULL || strncmp(ename, e->e_name, strlen(ename)) != 0 || 929 e->e_sysctl == NULL) 930 continue; 931 932 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 933 newp, newlen, p); 934 } 935 936 return (EOPNOTSUPP); 937 #endif 938 } 939 /* 940 * Convenience macros. 941 */ 942 943 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 944 if (oldlenp) { \ 945 if (!oldp) \ 946 *oldlenp = len; \ 947 else { \ 948 if (*oldlenp < len) \ 949 return(ENOMEM); \ 950 *oldlenp = len; \ 951 error = copyout((caddr_t)valp, oldp, len); \ 952 } \ 953 } 954 955 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 956 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 957 958 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 959 if (newp && newlen != len) \ 960 return (EINVAL); 961 962 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 963 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 964 965 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 966 if (error == 0 && newp) \ 967 error = copyin(newp, valp, len); 968 969 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 970 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 971 972 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 973 if (oldlenp) { \ 974 len = strlen(str) + 1; \ 975 if (!oldp) \ 976 *oldlenp = len; \ 977 else { \ 978 if (*oldlenp < len) { \ 979 err2 = ENOMEM; \ 980 len = *oldlenp; \ 981 } else \ 982 *oldlenp = len; \ 983 error = copyout(str, oldp, len);\ 984 if (error == 0) \ 985 error = err2; \ 986 } \ 987 } 988 989 /* 990 * Validate parameters and get old / set new parameters 991 * for an integer-valued sysctl function. 992 */ 993 int 994 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 995 { 996 int error = 0; 997 998 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 999 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1000 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1001 1002 return (error); 1003 } 1004 1005 1006 /* 1007 * As above, but read-only. 1008 */ 1009 int 1010 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1011 { 1012 int error = 0; 1013 1014 if (newp) 1015 return (EPERM); 1016 1017 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1018 1019 return (error); 1020 } 1021 1022 /* 1023 * Validate parameters and get old / set new parameters 1024 * for an quad-valued sysctl function. 1025 */ 1026 int 1027 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1028 quad_t *valp) 1029 { 1030 int error = 0; 1031 1032 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1033 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1034 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1035 1036 return (error); 1037 } 1038 1039 /* 1040 * As above, but read-only. 1041 */ 1042 int 1043 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1044 { 1045 int error = 0; 1046 1047 if (newp) 1048 return (EPERM); 1049 1050 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1051 1052 return (error); 1053 } 1054 1055 /* 1056 * Validate parameters and get old / set new parameters 1057 * for a string-valued sysctl function. 1058 */ 1059 int 1060 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1061 size_t maxlen) 1062 { 1063 int error = 0, err2 = 0; 1064 size_t len; 1065 1066 if (newp && newlen >= maxlen) 1067 return (EINVAL); 1068 1069 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1070 1071 if (error == 0 && newp) { 1072 error = copyin(newp, str, newlen); 1073 str[newlen] = 0; 1074 } 1075 return (error); 1076 } 1077 1078 /* 1079 * As above, but read-only. 1080 */ 1081 int 1082 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1083 { 1084 int error = 0, err2 = 0; 1085 size_t len; 1086 1087 if (newp) 1088 return (EPERM); 1089 1090 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1091 1092 return (error); 1093 } 1094 1095 /* 1096 * Validate parameters and get old / set new parameters 1097 * for a structure oriented sysctl function. 1098 */ 1099 int 1100 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1101 size_t len) 1102 { 1103 int error = 0; 1104 1105 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1106 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1107 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1108 1109 return (error); 1110 } 1111 1112 /* 1113 * Validate parameters and get old parameters 1114 * for a structure oriented sysctl function. 1115 */ 1116 int 1117 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1118 size_t len) 1119 { 1120 int error = 0; 1121 1122 if (newp) 1123 return (EPERM); 1124 1125 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1126 1127 return (error); 1128 } 1129 1130 /* 1131 * As above, but can return a truncated result. 1132 */ 1133 int 1134 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1135 size_t len) 1136 { 1137 int error = 0; 1138 1139 if (newp) 1140 return (EPERM); 1141 1142 len = min(*oldlenp, len); 1143 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1144 1145 return (error); 1146 } 1147 1148 /* 1149 * Get file structures. 1150 */ 1151 static int 1152 sysctl_file(void *vwhere, size_t *sizep) 1153 { 1154 int error; 1155 size_t buflen; 1156 struct file *fp; 1157 char *start, *where; 1158 1159 start = where = vwhere; 1160 buflen = *sizep; 1161 if (where == NULL) { 1162 /* 1163 * overestimate by 10 files 1164 */ 1165 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1166 return (0); 1167 } 1168 1169 /* 1170 * first copyout filehead 1171 */ 1172 if (buflen < sizeof(filehead)) { 1173 *sizep = 0; 1174 return (0); 1175 } 1176 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1177 if (error) 1178 return (error); 1179 buflen -= sizeof(filehead); 1180 where += sizeof(filehead); 1181 1182 /* 1183 * followed by an array of file structures 1184 */ 1185 LIST_FOREACH(fp, &filehead, f_list) { 1186 if (buflen < sizeof(struct file)) { 1187 *sizep = where - start; 1188 return (ENOMEM); 1189 } 1190 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1191 if (error) 1192 return (error); 1193 buflen -= sizeof(struct file); 1194 where += sizeof(struct file); 1195 } 1196 *sizep = where - start; 1197 return (0); 1198 } 1199 1200 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1201 #define FILL_PERM(src, dst) do { \ 1202 (dst)._key = (src)._key; \ 1203 (dst).uid = (src).uid; \ 1204 (dst).gid = (src).gid; \ 1205 (dst).cuid = (src).cuid; \ 1206 (dst).cgid = (src).cgid; \ 1207 (dst).mode = (src).mode; \ 1208 (dst)._seq = (src)._seq; \ 1209 } while (/*CONSTCOND*/ 0); 1210 #define FILL_MSG(src, dst) do { \ 1211 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1212 (dst).msg_qnum = (src).msg_qnum; \ 1213 (dst).msg_qbytes = (src).msg_qbytes; \ 1214 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1215 (dst).msg_lspid = (src).msg_lspid; \ 1216 (dst).msg_lrpid = (src).msg_lrpid; \ 1217 (dst).msg_stime = (src).msg_stime; \ 1218 (dst).msg_rtime = (src).msg_rtime; \ 1219 (dst).msg_ctime = (src).msg_ctime; \ 1220 } while (/*CONSTCOND*/ 0) 1221 #define FILL_SEM(src, dst) do { \ 1222 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1223 (dst).sem_nsems = (src).sem_nsems; \ 1224 (dst).sem_otime = (src).sem_otime; \ 1225 (dst).sem_ctime = (src).sem_ctime; \ 1226 } while (/*CONSTCOND*/ 0) 1227 #define FILL_SHM(src, dst) do { \ 1228 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1229 (dst).shm_segsz = (src).shm_segsz; \ 1230 (dst).shm_lpid = (src).shm_lpid; \ 1231 (dst).shm_cpid = (src).shm_cpid; \ 1232 (dst).shm_atime = (src).shm_atime; \ 1233 (dst).shm_dtime = (src).shm_dtime; \ 1234 (dst).shm_ctime = (src).shm_ctime; \ 1235 (dst).shm_nattch = (src).shm_nattch; \ 1236 } while (/*CONSTCOND*/ 0) 1237 1238 static int 1239 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1240 { 1241 #ifdef SYSVMSG 1242 struct msg_sysctl_info *msgsi; 1243 #endif 1244 #ifdef SYSVSEM 1245 struct sem_sysctl_info *semsi; 1246 #endif 1247 #ifdef SYSVSHM 1248 struct shm_sysctl_info *shmsi; 1249 #endif 1250 size_t infosize, dssize, tsize, buflen; 1251 void *buf = NULL; 1252 char *start; 1253 int32_t nds; 1254 int i, error, ret; 1255 1256 if (namelen != 1) 1257 return (EINVAL); 1258 1259 start = where; 1260 buflen = *sizep; 1261 1262 switch (*name) { 1263 case KERN_SYSVIPC_MSG_INFO: 1264 #ifdef SYSVMSG 1265 infosize = sizeof(msgsi->msginfo); 1266 nds = msginfo.msgmni; 1267 dssize = sizeof(msgsi->msgids[0]); 1268 break; 1269 #else 1270 return (EINVAL); 1271 #endif 1272 case KERN_SYSVIPC_SEM_INFO: 1273 #ifdef SYSVSEM 1274 infosize = sizeof(semsi->seminfo); 1275 nds = seminfo.semmni; 1276 dssize = sizeof(semsi->semids[0]); 1277 break; 1278 #else 1279 return (EINVAL); 1280 #endif 1281 case KERN_SYSVIPC_SHM_INFO: 1282 #ifdef SYSVSHM 1283 infosize = sizeof(shmsi->shminfo); 1284 nds = shminfo.shmmni; 1285 dssize = sizeof(shmsi->shmids[0]); 1286 break; 1287 #else 1288 return (EINVAL); 1289 #endif 1290 default: 1291 return (EINVAL); 1292 } 1293 /* 1294 * Round infosize to 64 bit boundary if requesting more than just 1295 * the info structure or getting the total data size. 1296 */ 1297 if (where == NULL || *sizep > infosize) 1298 infosize = ((infosize + 7) / 8) * 8; 1299 tsize = infosize + nds * dssize; 1300 1301 /* Return just the total size required. */ 1302 if (where == NULL) { 1303 *sizep = tsize; 1304 return (0); 1305 } 1306 1307 /* Not enough room for even the info struct. */ 1308 if (buflen < infosize) { 1309 *sizep = 0; 1310 return (ENOMEM); 1311 } 1312 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1313 memset(buf, 0, min(tsize, buflen)); 1314 1315 switch (*name) { 1316 #ifdef SYSVMSG 1317 case KERN_SYSVIPC_MSG_INFO: 1318 msgsi = (struct msg_sysctl_info *)buf; 1319 msgsi->msginfo = msginfo; 1320 break; 1321 #endif 1322 #ifdef SYSVSEM 1323 case KERN_SYSVIPC_SEM_INFO: 1324 semsi = (struct sem_sysctl_info *)buf; 1325 semsi->seminfo = seminfo; 1326 break; 1327 #endif 1328 #ifdef SYSVSHM 1329 case KERN_SYSVIPC_SHM_INFO: 1330 shmsi = (struct shm_sysctl_info *)buf; 1331 shmsi->shminfo = shminfo; 1332 break; 1333 #endif 1334 } 1335 buflen -= infosize; 1336 1337 ret = 0; 1338 if (buflen > 0) { 1339 /* Fill in the IPC data structures. */ 1340 for (i = 0; i < nds; i++) { 1341 if (buflen < dssize) { 1342 ret = ENOMEM; 1343 break; 1344 } 1345 switch (*name) { 1346 #ifdef SYSVMSG 1347 case KERN_SYSVIPC_MSG_INFO: 1348 FILL_MSG(msqids[i], msgsi->msgids[i]); 1349 break; 1350 #endif 1351 #ifdef SYSVSEM 1352 case KERN_SYSVIPC_SEM_INFO: 1353 FILL_SEM(sema[i], semsi->semids[i]); 1354 break; 1355 #endif 1356 #ifdef SYSVSHM 1357 case KERN_SYSVIPC_SHM_INFO: 1358 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1359 break; 1360 #endif 1361 } 1362 buflen -= dssize; 1363 } 1364 } 1365 *sizep -= buflen; 1366 error = copyout(buf, start, *sizep); 1367 /* If copyout succeeded, use return code set earlier. */ 1368 if (error == 0) 1369 error = ret; 1370 if (buf) 1371 free(buf, M_TEMP); 1372 return (error); 1373 } 1374 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1375 1376 static int 1377 sysctl_msgbuf(void *vwhere, size_t *sizep) 1378 { 1379 char *where = vwhere; 1380 size_t len, maxlen = *sizep; 1381 long beg, end; 1382 int error; 1383 1384 /* 1385 * deal with cases where the message buffer has 1386 * become corrupted. 1387 */ 1388 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1389 msgbufenabled = 0; 1390 return (ENXIO); 1391 } 1392 1393 if (where == NULL) { 1394 /* always return full buffer size */ 1395 *sizep = msgbufp->msg_bufs; 1396 return (0); 1397 } 1398 1399 error = 0; 1400 maxlen = min(msgbufp->msg_bufs, maxlen); 1401 1402 /* 1403 * First, copy from the write pointer to the end of 1404 * message buffer. 1405 */ 1406 beg = msgbufp->msg_bufx; 1407 end = msgbufp->msg_bufs; 1408 while (maxlen > 0) { 1409 len = min(end - beg, maxlen); 1410 if (len == 0) 1411 break; 1412 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1413 if (error) 1414 break; 1415 where += len; 1416 maxlen -= len; 1417 1418 /* 1419 * ... then, copy from the beginning of message buffer to 1420 * the write pointer. 1421 */ 1422 beg = 0; 1423 end = msgbufp->msg_bufx; 1424 } 1425 return (error); 1426 } 1427 1428 /* 1429 * try over estimating by 5 procs 1430 */ 1431 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1432 1433 static int 1434 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1435 { 1436 struct eproc eproc; 1437 struct kinfo_proc2 kproc2; 1438 struct kinfo_proc *dp; 1439 struct proc *p; 1440 const struct proclist_desc *pd; 1441 char *where, *dp2; 1442 int type, op, arg; 1443 u_int elem_size, elem_count; 1444 size_t buflen, needed; 1445 int error; 1446 1447 dp = vwhere; 1448 dp2 = where = vwhere; 1449 buflen = where != NULL ? *sizep : 0; 1450 error = 0; 1451 needed = 0; 1452 type = name[0]; 1453 1454 if (type == KERN_PROC) { 1455 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1456 return (EINVAL); 1457 op = name[1]; 1458 if (op != KERN_PROC_ALL) 1459 arg = name[2]; 1460 } else { 1461 if (namelen != 5) 1462 return (EINVAL); 1463 op = name[1]; 1464 arg = name[2]; 1465 elem_size = name[3]; 1466 elem_count = name[4]; 1467 } 1468 1469 proclist_lock_read(); 1470 1471 pd = proclists; 1472 again: 1473 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1474 /* 1475 * Skip embryonic processes. 1476 */ 1477 if (p->p_stat == SIDL) 1478 continue; 1479 /* 1480 * TODO - make more efficient (see notes below). 1481 * do by session. 1482 */ 1483 switch (op) { 1484 1485 case KERN_PROC_PID: 1486 /* could do this with just a lookup */ 1487 if (p->p_pid != (pid_t)arg) 1488 continue; 1489 break; 1490 1491 case KERN_PROC_PGRP: 1492 /* could do this by traversing pgrp */ 1493 if (p->p_pgrp->pg_id != (pid_t)arg) 1494 continue; 1495 break; 1496 1497 case KERN_PROC_SESSION: 1498 if (p->p_session->s_sid != (pid_t)arg) 1499 continue; 1500 break; 1501 1502 case KERN_PROC_TTY: 1503 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1504 if ((p->p_flag & P_CONTROLT) == 0 || 1505 p->p_session->s_ttyp == NULL || 1506 p->p_session->s_ttyvp != NULL) 1507 continue; 1508 } else if ((p->p_flag & P_CONTROLT) == 0 || 1509 p->p_session->s_ttyp == NULL) { 1510 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1511 continue; 1512 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1513 continue; 1514 break; 1515 1516 case KERN_PROC_UID: 1517 if (p->p_ucred->cr_uid != (uid_t)arg) 1518 continue; 1519 break; 1520 1521 case KERN_PROC_RUID: 1522 if (p->p_cred->p_ruid != (uid_t)arg) 1523 continue; 1524 break; 1525 1526 case KERN_PROC_GID: 1527 if (p->p_ucred->cr_gid != (uid_t)arg) 1528 continue; 1529 break; 1530 1531 case KERN_PROC_RGID: 1532 if (p->p_cred->p_rgid != (uid_t)arg) 1533 continue; 1534 break; 1535 1536 case KERN_PROC_ALL: 1537 /* allow everything */ 1538 break; 1539 1540 default: 1541 error = EINVAL; 1542 goto cleanup; 1543 } 1544 if (type == KERN_PROC) { 1545 if (buflen >= sizeof(struct kinfo_proc)) { 1546 fill_eproc(p, &eproc); 1547 error = copyout((caddr_t)p, &dp->kp_proc, 1548 sizeof(struct proc)); 1549 if (error) 1550 goto cleanup; 1551 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1552 sizeof(eproc)); 1553 if (error) 1554 goto cleanup; 1555 dp++; 1556 buflen -= sizeof(struct kinfo_proc); 1557 } 1558 needed += sizeof(struct kinfo_proc); 1559 } else { /* KERN_PROC2 */ 1560 if (buflen >= elem_size && elem_count > 0) { 1561 fill_kproc2(p, &kproc2); 1562 /* 1563 * Copy out elem_size, but not larger than 1564 * the size of a struct kinfo_proc2. 1565 */ 1566 error = copyout(&kproc2, dp2, 1567 min(sizeof(kproc2), elem_size)); 1568 if (error) 1569 goto cleanup; 1570 dp2 += elem_size; 1571 buflen -= elem_size; 1572 elem_count--; 1573 } 1574 needed += elem_size; 1575 } 1576 } 1577 pd++; 1578 if (pd->pd_list != NULL) 1579 goto again; 1580 proclist_unlock_read(); 1581 1582 if (where != NULL) { 1583 if (type == KERN_PROC) 1584 *sizep = (caddr_t)dp - where; 1585 else 1586 *sizep = dp2 - where; 1587 if (needed > *sizep) 1588 return (ENOMEM); 1589 } else { 1590 needed += KERN_PROCSLOP; 1591 *sizep = needed; 1592 } 1593 return (0); 1594 cleanup: 1595 proclist_unlock_read(); 1596 return (error); 1597 } 1598 1599 1600 /* 1601 * try over estimating by 5 LWPs 1602 */ 1603 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1604 1605 static int 1606 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1607 { 1608 struct kinfo_lwp klwp; 1609 struct proc *p; 1610 struct lwp *l; 1611 char *where, *dp; 1612 int type, pid, elem_size, elem_count; 1613 int buflen, needed, error; 1614 1615 dp = where = vwhere; 1616 buflen = where != NULL ? *sizep : 0; 1617 error = needed = 0; 1618 type = name[0]; 1619 1620 if (namelen != 4) 1621 return (EINVAL); 1622 pid = name[1]; 1623 elem_size = name[2]; 1624 elem_count = name[3]; 1625 1626 p = pfind(pid); 1627 if (p == NULL) 1628 return (ESRCH); 1629 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1630 if (buflen >= elem_size && elem_count > 0) { 1631 fill_lwp(l, &klwp); 1632 /* 1633 * Copy out elem_size, but not larger than 1634 * the size of a struct kinfo_proc2. 1635 */ 1636 error = copyout(&klwp, dp, 1637 min(sizeof(klwp), elem_size)); 1638 if (error) 1639 goto cleanup; 1640 dp += elem_size; 1641 buflen -= elem_size; 1642 elem_count--; 1643 } 1644 needed += elem_size; 1645 } 1646 1647 if (where != NULL) { 1648 *sizep = dp - where; 1649 if (needed > *sizep) 1650 return (ENOMEM); 1651 } else { 1652 needed += KERN_PROCSLOP; 1653 *sizep = needed; 1654 } 1655 return (0); 1656 cleanup: 1657 return (error); 1658 } 1659 1660 /* 1661 * Fill in an eproc structure for the specified process. 1662 */ 1663 void 1664 fill_eproc(struct proc *p, struct eproc *ep) 1665 { 1666 struct tty *tp; 1667 struct lwp *l; 1668 1669 ep->e_paddr = p; 1670 ep->e_sess = p->p_session; 1671 ep->e_pcred = *p->p_cred; 1672 ep->e_ucred = *p->p_ucred; 1673 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1674 ep->e_vm.vm_rssize = 0; 1675 ep->e_vm.vm_tsize = 0; 1676 ep->e_vm.vm_dsize = 0; 1677 ep->e_vm.vm_ssize = 0; 1678 /* ep->e_vm.vm_pmap = XXX; */ 1679 } else { 1680 struct vmspace *vm = p->p_vmspace; 1681 1682 ep->e_vm.vm_rssize = vm_resident_count(vm); 1683 ep->e_vm.vm_tsize = vm->vm_tsize; 1684 ep->e_vm.vm_dsize = vm->vm_dsize; 1685 ep->e_vm.vm_ssize = vm->vm_ssize; 1686 1687 /* Pick a "representative" LWP */ 1688 l = proc_representative_lwp(p); 1689 1690 if (l->l_wmesg) 1691 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1692 } 1693 if (p->p_pptr) 1694 ep->e_ppid = p->p_pptr->p_pid; 1695 else 1696 ep->e_ppid = 0; 1697 ep->e_pgid = p->p_pgrp->pg_id; 1698 ep->e_sid = ep->e_sess->s_sid; 1699 ep->e_jobc = p->p_pgrp->pg_jobc; 1700 if ((p->p_flag & P_CONTROLT) && 1701 (tp = ep->e_sess->s_ttyp)) { 1702 ep->e_tdev = tp->t_dev; 1703 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1704 ep->e_tsess = tp->t_session; 1705 } else 1706 ep->e_tdev = NODEV; 1707 1708 ep->e_xsize = ep->e_xrssize = 0; 1709 ep->e_xccount = ep->e_xswrss = 0; 1710 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1711 if (SESS_LEADER(p)) 1712 ep->e_flag |= EPROC_SLEADER; 1713 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1714 } 1715 1716 /* 1717 * Fill in an eproc structure for the specified process. 1718 */ 1719 static void 1720 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1721 { 1722 struct tty *tp; 1723 struct lwp *l; 1724 memset(ki, 0, sizeof(*ki)); 1725 1726 ki->p_paddr = PTRTOINT64(p); 1727 ki->p_fd = PTRTOINT64(p->p_fd); 1728 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1729 ki->p_stats = PTRTOINT64(p->p_stats); 1730 ki->p_limit = PTRTOINT64(p->p_limit); 1731 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1732 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1733 ki->p_sess = PTRTOINT64(p->p_session); 1734 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1735 ki->p_ru = PTRTOINT64(p->p_ru); 1736 1737 ki->p_eflag = 0; 1738 ki->p_exitsig = p->p_exitsig; 1739 ki->p_flag = p->p_flag; 1740 1741 ki->p_pid = p->p_pid; 1742 if (p->p_pptr) 1743 ki->p_ppid = p->p_pptr->p_pid; 1744 else 1745 ki->p_ppid = 0; 1746 ki->p_sid = p->p_session->s_sid; 1747 ki->p__pgid = p->p_pgrp->pg_id; 1748 1749 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1750 1751 ki->p_uid = p->p_ucred->cr_uid; 1752 ki->p_ruid = p->p_cred->p_ruid; 1753 ki->p_gid = p->p_ucred->cr_gid; 1754 ki->p_rgid = p->p_cred->p_rgid; 1755 1756 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1757 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1758 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1759 1760 ki->p_jobc = p->p_pgrp->pg_jobc; 1761 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1762 ki->p_tdev = tp->t_dev; 1763 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1764 ki->p_tsess = PTRTOINT64(tp->t_session); 1765 } else { 1766 ki->p_tdev = NODEV; 1767 } 1768 1769 ki->p_estcpu = p->p_estcpu; 1770 ki->p_rtime_sec = p->p_rtime.tv_sec; 1771 ki->p_rtime_usec = p->p_rtime.tv_usec; 1772 ki->p_cpticks = p->p_cpticks; 1773 ki->p_pctcpu = p->p_pctcpu; 1774 1775 ki->p_uticks = p->p_uticks; 1776 ki->p_sticks = p->p_sticks; 1777 ki->p_iticks = p->p_iticks; 1778 1779 ki->p_tracep = PTRTOINT64(p->p_tracep); 1780 ki->p_traceflag = p->p_traceflag; 1781 1782 1783 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1784 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1785 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1786 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1787 1788 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1789 ki->p_realstat = p->p_stat; 1790 ki->p_nice = p->p_nice; 1791 1792 ki->p_xstat = p->p_xstat; 1793 ki->p_acflag = p->p_acflag; 1794 1795 strncpy(ki->p_comm, p->p_comm, 1796 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1797 1798 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1799 1800 ki->p_nlwps = p->p_nlwps; 1801 ki->p_nrlwps = p->p_nrlwps; 1802 ki->p_realflag = p->p_flag; 1803 1804 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1805 ki->p_vm_rssize = 0; 1806 ki->p_vm_tsize = 0; 1807 ki->p_vm_dsize = 0; 1808 ki->p_vm_ssize = 0; 1809 l = NULL; 1810 } else { 1811 struct vmspace *vm = p->p_vmspace; 1812 1813 ki->p_vm_rssize = vm_resident_count(vm); 1814 ki->p_vm_tsize = vm->vm_tsize; 1815 ki->p_vm_dsize = vm->vm_dsize; 1816 ki->p_vm_ssize = vm->vm_ssize; 1817 1818 /* Pick a "representative" LWP */ 1819 l = proc_representative_lwp(p); 1820 ki->p_forw = PTRTOINT64(l->l_forw); 1821 ki->p_back = PTRTOINT64(l->l_back); 1822 ki->p_addr = PTRTOINT64(l->l_addr); 1823 ki->p_stat = l->l_stat; 1824 ki->p_flag |= l->l_flag; 1825 ki->p_swtime = l->l_swtime; 1826 ki->p_slptime = l->l_slptime; 1827 if (l->l_stat == LSONPROC) { 1828 KDASSERT(l->l_cpu != NULL); 1829 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1830 } else 1831 ki->p_schedflags = 0; 1832 ki->p_holdcnt = l->l_holdcnt; 1833 ki->p_priority = l->l_priority; 1834 ki->p_usrpri = l->l_usrpri; 1835 if (l->l_wmesg) 1836 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1837 ki->p_wchan = PTRTOINT64(l->l_wchan); 1838 1839 } 1840 1841 if (p->p_session->s_ttyvp) 1842 ki->p_eflag |= EPROC_CTTY; 1843 if (SESS_LEADER(p)) 1844 ki->p_eflag |= EPROC_SLEADER; 1845 1846 /* XXX Is this double check necessary? */ 1847 if (P_ZOMBIE(p)) { 1848 ki->p_uvalid = 0; 1849 } else { 1850 ki->p_uvalid = 1; 1851 1852 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1853 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1854 1855 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1856 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1857 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1858 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1859 1860 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1861 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1862 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1863 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1864 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1865 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1866 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1867 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1868 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1869 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1870 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1871 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1872 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1873 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1874 1875 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1876 p->p_stats->p_cru.ru_stime.tv_sec; 1877 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1878 p->p_stats->p_cru.ru_stime.tv_usec; 1879 } 1880 #ifdef MULTIPROCESSOR 1881 if (l && l->l_cpu != NULL) 1882 ki->p_cpuid = l->l_cpu->ci_cpuid; 1883 else 1884 #endif 1885 ki->p_cpuid = KI_NOCPU; 1886 1887 } 1888 1889 /* 1890 * Fill in a kinfo_lwp structure for the specified lwp. 1891 */ 1892 static void 1893 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1894 { 1895 kl->l_forw = PTRTOINT64(l->l_forw); 1896 kl->l_back = PTRTOINT64(l->l_back); 1897 kl->l_laddr = PTRTOINT64(l); 1898 kl->l_addr = PTRTOINT64(l->l_addr); 1899 kl->l_stat = l->l_stat; 1900 kl->l_lid = l->l_lid; 1901 kl->l_flag = l->l_flag; 1902 1903 kl->l_swtime = l->l_swtime; 1904 kl->l_slptime = l->l_slptime; 1905 if (l->l_stat == LSONPROC) { 1906 KDASSERT(l->l_cpu != NULL); 1907 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1908 } else 1909 kl->l_schedflags = 0; 1910 kl->l_holdcnt = l->l_holdcnt; 1911 kl->l_priority = l->l_priority; 1912 kl->l_usrpri = l->l_usrpri; 1913 if (l->l_wmesg) 1914 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1915 kl->l_wchan = PTRTOINT64(l->l_wchan); 1916 #ifdef MULTIPROCESSOR 1917 if (l->l_cpu != NULL) 1918 kl->l_cpuid = l->l_cpu->ci_cpuid; 1919 else 1920 #endif 1921 kl->l_cpuid = KI_NOCPU; 1922 } 1923 1924 int 1925 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1926 struct proc *up) 1927 { 1928 struct ps_strings pss; 1929 struct proc *p; 1930 size_t len, upper_bound, xlen, i; 1931 struct uio auio; 1932 struct iovec aiov; 1933 vaddr_t argv; 1934 pid_t pid; 1935 int nargv, type, error; 1936 char *arg; 1937 char *tmp; 1938 1939 if (namelen != 2) 1940 return (EINVAL); 1941 pid = name[0]; 1942 type = name[1]; 1943 1944 switch (type) { 1945 case KERN_PROC_ARGV: 1946 case KERN_PROC_NARGV: 1947 case KERN_PROC_ENV: 1948 case KERN_PROC_NENV: 1949 /* ok */ 1950 break; 1951 default: 1952 return (EINVAL); 1953 } 1954 1955 /* check pid */ 1956 if ((p = pfind(pid)) == NULL) 1957 return (EINVAL); 1958 1959 /* only root or same user change look at the environment */ 1960 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1961 if (up->p_ucred->cr_uid != 0) { 1962 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1963 up->p_cred->p_ruid != p->p_cred->p_svuid) 1964 return (EPERM); 1965 } 1966 } 1967 1968 if (sizep != NULL && where == NULL) { 1969 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1970 *sizep = sizeof (int); 1971 else 1972 *sizep = ARG_MAX; /* XXX XXX XXX */ 1973 return (0); 1974 } 1975 if (where == NULL || sizep == NULL) 1976 return (EINVAL); 1977 1978 /* 1979 * Zombies don't have a stack, so we can't read their psstrings. 1980 * System processes also don't have a user stack. 1981 */ 1982 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1983 return (EINVAL); 1984 1985 /* 1986 * Lock the process down in memory. 1987 */ 1988 /* XXXCDC: how should locking work here? */ 1989 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1990 return (EFAULT); 1991 1992 p->p_vmspace->vm_refcnt++; /* XXX */ 1993 1994 /* 1995 * Allocate a temporary buffer to hold the arguments. 1996 */ 1997 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1998 1999 /* 2000 * Read in the ps_strings structure. 2001 */ 2002 aiov.iov_base = &pss; 2003 aiov.iov_len = sizeof(pss); 2004 auio.uio_iov = &aiov; 2005 auio.uio_iovcnt = 1; 2006 auio.uio_offset = (vaddr_t)p->p_psstr; 2007 auio.uio_resid = sizeof(pss); 2008 auio.uio_segflg = UIO_SYSSPACE; 2009 auio.uio_rw = UIO_READ; 2010 auio.uio_procp = NULL; 2011 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2012 if (error) 2013 goto done; 2014 2015 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2016 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2017 else 2018 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2019 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2020 error = copyout(&nargv, where, sizeof(nargv)); 2021 *sizep = sizeof(nargv); 2022 goto done; 2023 } 2024 /* 2025 * Now read the address of the argument vector. 2026 */ 2027 switch (type) { 2028 case KERN_PROC_ARGV: 2029 /* XXX compat32 stuff here */ 2030 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2031 break; 2032 case KERN_PROC_ENV: 2033 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2034 break; 2035 default: 2036 return (EINVAL); 2037 } 2038 auio.uio_offset = (off_t)(long)tmp; 2039 aiov.iov_base = &argv; 2040 aiov.iov_len = sizeof(argv); 2041 auio.uio_iov = &aiov; 2042 auio.uio_iovcnt = 1; 2043 auio.uio_resid = sizeof(argv); 2044 auio.uio_segflg = UIO_SYSSPACE; 2045 auio.uio_rw = UIO_READ; 2046 auio.uio_procp = NULL; 2047 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2048 if (error) 2049 goto done; 2050 2051 /* 2052 * Now copy in the actual argument vector, one page at a time, 2053 * since we don't know how long the vector is (though, we do 2054 * know how many NUL-terminated strings are in the vector). 2055 */ 2056 len = 0; 2057 upper_bound = *sizep; 2058 for (; nargv != 0 && len < upper_bound; len += xlen) { 2059 aiov.iov_base = arg; 2060 aiov.iov_len = PAGE_SIZE; 2061 auio.uio_iov = &aiov; 2062 auio.uio_iovcnt = 1; 2063 auio.uio_offset = argv + len; 2064 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2065 auio.uio_resid = xlen; 2066 auio.uio_segflg = UIO_SYSSPACE; 2067 auio.uio_rw = UIO_READ; 2068 auio.uio_procp = NULL; 2069 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2070 if (error) 2071 goto done; 2072 2073 for (i = 0; i < xlen && nargv != 0; i++) { 2074 if (arg[i] == '\0') 2075 nargv--; /* one full string */ 2076 } 2077 2078 /* 2079 * Make sure we don't copyout past the end of the user's 2080 * buffer. 2081 */ 2082 if (len + i > upper_bound) 2083 i = upper_bound - len; 2084 2085 error = copyout(arg, (char *)where + len, i); 2086 if (error) 2087 break; 2088 2089 if (nargv == 0) { 2090 len += i; 2091 break; 2092 } 2093 } 2094 *sizep = len; 2095 2096 done: 2097 uvmspace_free(p->p_vmspace); 2098 2099 free(arg, M_TEMP); 2100 return (error); 2101 } 2102 2103 #if NPTY > 0 2104 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2105 2106 /* 2107 * Validate parameters and get old / set new parameters 2108 * for pty sysctl function. 2109 */ 2110 static int 2111 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2112 { 2113 int error = 0; 2114 int oldmax = 0, newmax = 0; 2115 2116 /* get current value of maxptys */ 2117 oldmax = pty_maxptys(0, 0); 2118 2119 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2120 2121 if (!error && newp) { 2122 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2123 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2124 2125 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2126 return (EINVAL); 2127 2128 } 2129 2130 return (error); 2131 } 2132 #endif /* NPTY > 0 */ 2133 2134 static int 2135 sysctl_dotkstat(name, namelen, where, sizep, newp) 2136 int *name; 2137 u_int namelen; 2138 void *where; 2139 size_t *sizep; 2140 void *newp; 2141 { 2142 /* all sysctl names at this level are terminal */ 2143 if (namelen != 1) 2144 return (ENOTDIR); /* overloaded */ 2145 2146 switch (name[0]) { 2147 case KERN_TKSTAT_NIN: 2148 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2149 case KERN_TKSTAT_NOUT: 2150 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2151 case KERN_TKSTAT_CANCC: 2152 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2153 case KERN_TKSTAT_RAWCC: 2154 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2155 default: 2156 return (EOPNOTSUPP); 2157 } 2158 } 2159
Indexes created Tue Sep 30 06:09:59 GMT 2025