kern_sysctl.c revision 1.49
1 /* $NetBSD: kern_sysctl.c,v 1.49 1999/07/22 21:08:32 thorpej 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 "opt_ddb.h" 46 #include "opt_insecure.h" 47 #include "opt_shortcorename.h" 48 #include "opt_sysv.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/kernel.h> 53 #include <sys/malloc.h> 54 #include <sys/proc.h> 55 #include <sys/file.h> 56 #include <sys/vnode.h> 57 #include <sys/unistd.h> 58 #include <sys/buf.h> 59 #include <sys/ioctl.h> 60 #include <sys/tty.h> 61 #include <sys/disklabel.h> 62 #include <sys/device.h> 63 #include <vm/vm.h> 64 #include <sys/sysctl.h> 65 #include <sys/msgbuf.h> 66 67 #include <uvm/uvm_extern.h> 68 69 #include <sys/mount.h> 70 #include <sys/syscallargs.h> 71 72 73 #if defined(DDB) 74 #include <ddb/ddbvar.h> 75 #endif 76 77 /* 78 * Locking and stats 79 */ 80 static struct sysctl_lock { 81 int sl_lock; 82 int sl_want; 83 int sl_locked; 84 } memlock; 85 86 int 87 sys___sysctl(p, v, retval) 88 struct proc *p; 89 void *v; 90 register_t *retval; 91 { 92 register struct sys___sysctl_args /* { 93 syscallarg(int *) name; 94 syscallarg(u_int) namelen; 95 syscallarg(void *) old; 96 syscallarg(size_t *) oldlenp; 97 syscallarg(void *) new; 98 syscallarg(size_t) newlen; 99 } */ *uap = v; 100 int error, dolock = 1; 101 size_t savelen = 0, oldlen = 0; 102 sysctlfn *fn; 103 int name[CTL_MAXNAME]; 104 105 if (SCARG(uap, new) != NULL && 106 (error = suser(p->p_ucred, &p->p_acflag))) 107 return (error); 108 /* 109 * all top-level sysctl names are non-terminal 110 */ 111 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 112 return (EINVAL); 113 error = copyin(SCARG(uap, name), &name, 114 SCARG(uap, namelen) * sizeof(int)); 115 if (error) 116 return (error); 117 118 switch (name[0]) { 119 case CTL_KERN: 120 fn = kern_sysctl; 121 if (name[2] != KERN_VNODE) /* XXX */ 122 dolock = 0; 123 break; 124 case CTL_HW: 125 fn = hw_sysctl; 126 break; 127 case CTL_VM: 128 fn = uvm_sysctl; 129 break; 130 case CTL_NET: 131 fn = net_sysctl; 132 break; 133 case CTL_VFS: 134 fn = vfs_sysctl; 135 break; 136 case CTL_MACHDEP: 137 fn = cpu_sysctl; 138 break; 139 #ifdef DEBUG 140 case CTL_DEBUG: 141 fn = debug_sysctl; 142 break; 143 #endif 144 #ifdef DDB 145 case CTL_DDB: 146 fn = ddb_sysctl; 147 break; 148 #endif 149 default: 150 return (EOPNOTSUPP); 151 } 152 153 if (SCARG(uap, oldlenp) && 154 (error = copyin(SCARG(uap, oldlenp), &oldlen, sizeof(oldlen)))) 155 return (error); 156 if (SCARG(uap, old) != NULL) { 157 if (!uvm_useracc(SCARG(uap, old), oldlen, B_WRITE)) 158 return (EFAULT); 159 while (memlock.sl_lock) { 160 memlock.sl_want = 1; 161 sleep((caddr_t)&memlock, PRIBIO+1); 162 memlock.sl_locked++; 163 } 164 memlock.sl_lock = 1; 165 if (dolock) { 166 /* 167 * XXX Um, this is kind of evil. What should we 168 * XXX be passing here? 169 */ 170 if (uvm_vslock(p, SCARG(uap, old), oldlen, 171 VM_PROT_NONE) != KERN_SUCCESS) { 172 memlock.sl_lock = 0; 173 if (memlock.sl_want) { 174 memlock.sl_want = 0; 175 wakeup((caddr_t)&memlock); 176 return (EFAULT); 177 } 178 } 179 } 180 savelen = oldlen; 181 } 182 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 183 &oldlen, SCARG(uap, new), SCARG(uap, newlen), p); 184 if (SCARG(uap, old) != NULL) { 185 if (dolock) 186 uvm_vsunlock(p, SCARG(uap, old), savelen); 187 memlock.sl_lock = 0; 188 if (memlock.sl_want) { 189 memlock.sl_want = 0; 190 wakeup((caddr_t)&memlock); 191 } 192 } 193 if (error) 194 return (error); 195 if (SCARG(uap, oldlenp)) 196 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 197 return (error); 198 } 199 200 /* 201 * Attributes stored in the kernel. 202 */ 203 char hostname[MAXHOSTNAMELEN]; 204 int hostnamelen; 205 char domainname[MAXHOSTNAMELEN]; 206 int domainnamelen; 207 long hostid; 208 #ifdef INSECURE 209 int securelevel = -1; 210 #else 211 int securelevel = 0; 212 #endif 213 #ifdef SHORTCORENAME 214 int shortcorename = 1; 215 #else 216 int shortcorename = 0; 217 #endif 218 219 /* 220 * kernel related system variables. 221 */ 222 int 223 kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 224 int *name; 225 u_int namelen; 226 void *oldp; 227 size_t *oldlenp; 228 void *newp; 229 size_t newlen; 230 struct proc *p; 231 { 232 int error, level, inthostid; 233 int old_autonicetime; 234 int old_vnodes; 235 int old_shortcorename; 236 extern char ostype[], osrelease[], version[]; 237 238 /* All sysctl names at this level, except for a few, are terminal. */ 239 switch (name[0]) { 240 case KERN_PROC: 241 case KERN_PROF: 242 case KERN_MBUF: 243 /* Not terminal. */ 244 break; 245 default: 246 if (namelen != 1) 247 return (ENOTDIR); /* overloaded */ 248 } 249 250 switch (name[0]) { 251 case KERN_OSTYPE: 252 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 253 case KERN_OSRELEASE: 254 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 255 case KERN_OSREV: 256 return (sysctl_rdint(oldp, oldlenp, newp, NetBSD)); 257 case KERN_VERSION: 258 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 259 case KERN_MAXVNODES: 260 old_vnodes = desiredvnodes; 261 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 262 if (old_vnodes > desiredvnodes) { 263 desiredvnodes = old_vnodes; 264 return (EINVAL); 265 } 266 return (error); 267 case KERN_MAXPROC: 268 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 269 case KERN_MAXFILES: 270 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 271 case KERN_ARGMAX: 272 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 273 case KERN_SECURELVL: 274 level = securelevel; 275 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 276 newp == NULL) 277 return (error); 278 if (level < securelevel && p->p_pid != 1) 279 return (EPERM); 280 securelevel = level; 281 return (0); 282 case KERN_HOSTNAME: 283 error = sysctl_string(oldp, oldlenp, newp, newlen, 284 hostname, sizeof(hostname)); 285 if (newp && !error) 286 hostnamelen = newlen; 287 return (error); 288 case KERN_DOMAINNAME: 289 error = sysctl_string(oldp, oldlenp, newp, newlen, 290 domainname, sizeof(domainname)); 291 if (newp && !error) 292 domainnamelen = newlen; 293 return (error); 294 case KERN_HOSTID: 295 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 296 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 297 hostid = inthostid; 298 return (error); 299 case KERN_CLOCKRATE: 300 return (sysctl_clockrate(oldp, oldlenp)); 301 case KERN_BOOTTIME: 302 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 303 sizeof(struct timeval))); 304 case KERN_VNODE: 305 return (sysctl_vnode(oldp, oldlenp, p)); 306 case KERN_PROC: 307 return (sysctl_doproc(name + 1, namelen - 1, oldp, oldlenp)); 308 case KERN_FILE: 309 return (sysctl_file(oldp, oldlenp)); 310 #ifdef GPROF 311 case KERN_PROF: 312 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 313 newp, newlen)); 314 #endif 315 case KERN_POSIX1: 316 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 317 case KERN_NGROUPS: 318 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 319 case KERN_JOB_CONTROL: 320 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 321 case KERN_SAVED_IDS: 322 #ifdef _POSIX_SAVED_IDS 323 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 324 #else 325 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 326 #endif 327 case KERN_MAXPARTITIONS: 328 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 329 case KERN_RAWPARTITION: 330 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 331 #ifdef NTP 332 case KERN_NTPTIME: 333 return (sysctl_ntptime(oldp, oldlenp)); 334 #endif 335 case KERN_AUTONICETIME: 336 old_autonicetime = autonicetime; 337 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 338 if (autonicetime < 0) 339 autonicetime = old_autonicetime; 340 return (error); 341 case KERN_AUTONICEVAL: 342 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 343 if (autoniceval < PRIO_MIN) 344 autoniceval = PRIO_MIN; 345 if (autoniceval > PRIO_MAX) 346 autoniceval = PRIO_MAX; 347 return (error); 348 case KERN_RTC_OFFSET: 349 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 350 case KERN_ROOT_DEVICE: 351 return (sysctl_rdstring(oldp, oldlenp, newp, 352 root_device->dv_xname)); 353 case KERN_MSGBUFSIZE: 354 /* 355 * deal with cases where the message buffer has 356 * become corrupted. 357 */ 358 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 359 msgbufenabled = 0; 360 return (ENXIO); 361 } 362 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 363 case KERN_FSYNC: 364 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 365 case KERN_SYSVMSG: 366 #ifdef SYSVMSG 367 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 368 #else 369 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 370 #endif 371 case KERN_SYSVSEM: 372 #ifdef SYSVSEM 373 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 374 #else 375 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 376 #endif 377 case KERN_SYSVSHM: 378 #ifdef SYSVSHM 379 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 380 #else 381 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 382 #endif 383 case KERN_SHORTCORENAME: 384 /* Only allow values of zero or one. */ 385 old_shortcorename = shortcorename; 386 error = sysctl_int(oldp, oldlenp, newp, newlen, 387 &shortcorename); 388 if (shortcorename != 0 && shortcorename != 1) { 389 shortcorename = old_shortcorename; 390 return (EINVAL); 391 } 392 return (error); 393 case KERN_SYNCHRONIZED_IO: 394 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 395 case KERN_IOV_MAX: 396 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 397 case KERN_MBUF: 398 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 399 newp, newlen)); 400 case KERN_MAPPED_FILES: 401 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 402 case KERN_MEMLOCK: 403 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 404 case KERN_MEMLOCK_RANGE: 405 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 406 case KERN_MEMORY_PROTECTION: 407 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 408 default: 409 return (EOPNOTSUPP); 410 } 411 /* NOTREACHED */ 412 } 413 414 /* 415 * hardware related system variables. 416 */ 417 int 418 hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 419 int *name; 420 u_int namelen; 421 void *oldp; 422 size_t *oldlenp; 423 void *newp; 424 size_t newlen; 425 struct proc *p; 426 { 427 extern char machine[], machine_arch[], cpu_model[]; 428 429 /* all sysctl names at this level are terminal */ 430 if (namelen != 1) 431 return (ENOTDIR); /* overloaded */ 432 433 switch (name[0]) { 434 case HW_MACHINE: 435 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 436 case HW_MACHINE_ARCH: 437 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 438 case HW_MODEL: 439 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 440 case HW_NCPU: 441 return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */ 442 case HW_BYTEORDER: 443 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 444 case HW_PHYSMEM: 445 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 446 case HW_USERMEM: 447 return (sysctl_rdint(oldp, oldlenp, newp, 448 ctob(physmem - uvmexp.wired))); 449 case HW_PAGESIZE: 450 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 451 default: 452 return (EOPNOTSUPP); 453 } 454 /* NOTREACHED */ 455 } 456 457 #ifdef DEBUG 458 /* 459 * Debugging related system variables. 460 */ 461 struct ctldebug debug0, debug1, debug2, debug3, debug4; 462 struct ctldebug debug5, debug6, debug7, debug8, debug9; 463 struct ctldebug debug10, debug11, debug12, debug13, debug14; 464 struct ctldebug debug15, debug16, debug17, debug18, debug19; 465 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 466 &debug0, &debug1, &debug2, &debug3, &debug4, 467 &debug5, &debug6, &debug7, &debug8, &debug9, 468 &debug10, &debug11, &debug12, &debug13, &debug14, 469 &debug15, &debug16, &debug17, &debug18, &debug19, 470 }; 471 int 472 debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 473 int *name; 474 u_int namelen; 475 void *oldp; 476 size_t *oldlenp; 477 void *newp; 478 size_t newlen; 479 struct proc *p; 480 { 481 struct ctldebug *cdp; 482 483 /* all sysctl names at this level are name and field */ 484 if (namelen != 2) 485 return (ENOTDIR); /* overloaded */ 486 cdp = debugvars[name[0]]; 487 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 488 return (EOPNOTSUPP); 489 switch (name[1]) { 490 case CTL_DEBUG_NAME: 491 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 492 case CTL_DEBUG_VALUE: 493 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 494 default: 495 return (EOPNOTSUPP); 496 } 497 /* NOTREACHED */ 498 } 499 #endif /* DEBUG */ 500 501 /* 502 * Validate parameters and get old / set new parameters 503 * for an integer-valued sysctl function. 504 */ 505 int 506 sysctl_int(oldp, oldlenp, newp, newlen, valp) 507 void *oldp; 508 size_t *oldlenp; 509 void *newp; 510 size_t newlen; 511 int *valp; 512 { 513 int error = 0; 514 515 if (oldp && *oldlenp < sizeof(int)) 516 return (ENOMEM); 517 if (newp && newlen != sizeof(int)) 518 return (EINVAL); 519 *oldlenp = sizeof(int); 520 if (oldp) 521 error = copyout(valp, oldp, sizeof(int)); 522 if (error == 0 && newp) 523 error = copyin(newp, valp, sizeof(int)); 524 return (error); 525 } 526 527 /* 528 * As above, but read-only. 529 */ 530 int 531 sysctl_rdint(oldp, oldlenp, newp, val) 532 void *oldp; 533 size_t *oldlenp; 534 void *newp; 535 int val; 536 { 537 int error = 0; 538 539 if (oldp && *oldlenp < sizeof(int)) 540 return (ENOMEM); 541 if (newp) 542 return (EPERM); 543 *oldlenp = sizeof(int); 544 if (oldp) 545 error = copyout((caddr_t)&val, oldp, sizeof(int)); 546 return (error); 547 } 548 549 /* 550 * Validate parameters and get old / set new parameters 551 * for a string-valued sysctl function. 552 */ 553 int 554 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 555 void *oldp; 556 size_t *oldlenp; 557 void *newp; 558 size_t newlen; 559 char *str; 560 int maxlen; 561 { 562 int len, error = 0; 563 564 len = strlen(str) + 1; 565 if (oldp && *oldlenp < len) 566 return (ENOMEM); 567 if (newp && newlen >= maxlen) 568 return (EINVAL); 569 if (oldp) { 570 *oldlenp = len; 571 error = copyout(str, oldp, len); 572 } 573 if (error == 0 && newp) { 574 error = copyin(newp, str, newlen); 575 str[newlen] = 0; 576 } 577 return (error); 578 } 579 580 /* 581 * As above, but read-only. 582 */ 583 int 584 sysctl_rdstring(oldp, oldlenp, newp, str) 585 void *oldp; 586 size_t *oldlenp; 587 void *newp; 588 char *str; 589 { 590 int len, error = 0; 591 592 len = strlen(str) + 1; 593 if (oldp && *oldlenp < len) 594 return (ENOMEM); 595 if (newp) 596 return (EPERM); 597 *oldlenp = len; 598 if (oldp) 599 error = copyout(str, oldp, len); 600 return (error); 601 } 602 603 /* 604 * Validate parameters and get old / set new parameters 605 * for a structure oriented sysctl function. 606 */ 607 int 608 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 609 void *oldp; 610 size_t *oldlenp; 611 void *newp; 612 size_t newlen; 613 void *sp; 614 int len; 615 { 616 int error = 0; 617 618 if (oldp && *oldlenp < len) 619 return (ENOMEM); 620 if (newp && newlen > len) 621 return (EINVAL); 622 if (oldp) { 623 *oldlenp = len; 624 error = copyout(sp, oldp, len); 625 } 626 if (error == 0 && newp) 627 error = copyin(newp, sp, len); 628 return (error); 629 } 630 631 /* 632 * Validate parameters and get old parameters 633 * for a structure oriented sysctl function. 634 */ 635 int 636 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 637 void *oldp; 638 size_t *oldlenp; 639 void *newp, *sp; 640 int len; 641 { 642 int error = 0; 643 644 if (oldp && *oldlenp < len) 645 return (ENOMEM); 646 if (newp) 647 return (EPERM); 648 *oldlenp = len; 649 if (oldp) 650 error = copyout(sp, oldp, len); 651 return (error); 652 } 653 654 /* 655 * Get file structures. 656 */ 657 int 658 sysctl_file(where, sizep) 659 char *where; 660 size_t *sizep; 661 { 662 int buflen, error; 663 struct file *fp; 664 char *start = where; 665 666 buflen = *sizep; 667 if (where == NULL) { 668 /* 669 * overestimate by 10 files 670 */ 671 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 672 return (0); 673 } 674 675 /* 676 * first copyout filehead 677 */ 678 if (buflen < sizeof(filehead)) { 679 *sizep = 0; 680 return (0); 681 } 682 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 683 if (error) 684 return (error); 685 buflen -= sizeof(filehead); 686 where += sizeof(filehead); 687 688 /* 689 * followed by an array of file structures 690 */ 691 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 692 if (buflen < sizeof(struct file)) { 693 *sizep = where - start; 694 return (ENOMEM); 695 } 696 error = copyout((caddr_t)fp, where, sizeof(struct file)); 697 if (error) 698 return (error); 699 buflen -= sizeof(struct file); 700 where += sizeof(struct file); 701 } 702 *sizep = where - start; 703 return (0); 704 } 705 706 /* 707 * try over estimating by 5 procs 708 */ 709 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 710 711 int 712 sysctl_doproc(name, namelen, where, sizep) 713 int *name; 714 u_int namelen; 715 char *where; 716 size_t *sizep; 717 { 718 register struct proc *p; 719 register struct kinfo_proc *dp = (struct kinfo_proc *)where; 720 register int needed = 0; 721 int buflen = where != NULL ? *sizep : 0; 722 const struct proclist_desc *pd; 723 struct eproc eproc; 724 int error = 0; 725 726 if (namelen != 2 && !(namelen == 1 && name[0] == KERN_PROC_ALL)) 727 return (EINVAL); 728 729 proclist_lock_read(0); 730 731 pd = proclists; 732 again: 733 for (p = LIST_FIRST(pd->pd_list); p != NULL; 734 p = LIST_NEXT(p, p_list)) { 735 /* 736 * Skip embryonic processes. 737 */ 738 if (p->p_stat == SIDL) 739 continue; 740 /* 741 * TODO - make more efficient (see notes below). 742 * do by session. 743 */ 744 switch (name[0]) { 745 746 case KERN_PROC_PID: 747 /* could do this with just a lookup */ 748 if (p->p_pid != (pid_t)name[1]) 749 continue; 750 break; 751 752 case KERN_PROC_PGRP: 753 /* could do this by traversing pgrp */ 754 if (p->p_pgrp->pg_id != (pid_t)name[1]) 755 continue; 756 break; 757 758 case KERN_PROC_TTY: 759 if ((p->p_flag & P_CONTROLT) == 0 || 760 p->p_session->s_ttyp == NULL || 761 p->p_session->s_ttyp->t_dev != (dev_t)name[1]) 762 continue; 763 break; 764 765 case KERN_PROC_UID: 766 if (p->p_ucred->cr_uid != (uid_t)name[1]) 767 continue; 768 break; 769 770 case KERN_PROC_RUID: 771 if (p->p_cred->p_ruid != (uid_t)name[1]) 772 continue; 773 break; 774 } 775 if (buflen >= sizeof(struct kinfo_proc)) { 776 fill_eproc(p, &eproc); 777 error = copyout((caddr_t)p, &dp->kp_proc, 778 sizeof(struct proc)); 779 if (error) 780 return (error); 781 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 782 sizeof(eproc)); 783 if (error) 784 return (error); 785 dp++; 786 buflen -= sizeof(struct kinfo_proc); 787 } 788 needed += sizeof(struct kinfo_proc); 789 } 790 pd++; 791 if (pd->pd_list != NULL) 792 goto again; 793 proclist_unlock_read(); 794 795 if (where != NULL) { 796 *sizep = (caddr_t)dp - where; 797 if (needed > *sizep) 798 return (ENOMEM); 799 } else { 800 needed += KERN_PROCSLOP; 801 *sizep = needed; 802 } 803 return (0); 804 } 805 806 /* 807 * Fill in an eproc structure for the specified process. 808 */ 809 void 810 fill_eproc(p, ep) 811 register struct proc *p; 812 register struct eproc *ep; 813 { 814 register struct tty *tp; 815 816 ep->e_paddr = p; 817 ep->e_sess = p->p_pgrp->pg_session; 818 ep->e_pcred = *p->p_cred; 819 ep->e_ucred = *p->p_ucred; 820 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 821 ep->e_vm.vm_rssize = 0; 822 ep->e_vm.vm_tsize = 0; 823 ep->e_vm.vm_dsize = 0; 824 ep->e_vm.vm_ssize = 0; 825 /* ep->e_vm.vm_pmap = XXX; */ 826 } else { 827 register struct vmspace *vm = p->p_vmspace; 828 829 ep->e_vm.vm_rssize = vm_resident_count(vm); 830 ep->e_vm.vm_tsize = vm->vm_tsize; 831 ep->e_vm.vm_dsize = vm->vm_dsize; 832 ep->e_vm.vm_ssize = vm->vm_ssize; 833 } 834 if (p->p_pptr) 835 ep->e_ppid = p->p_pptr->p_pid; 836 else 837 ep->e_ppid = 0; 838 ep->e_pgid = p->p_pgrp->pg_id; 839 ep->e_sid = ep->e_sess->s_sid; 840 ep->e_jobc = p->p_pgrp->pg_jobc; 841 if ((p->p_flag & P_CONTROLT) && 842 (tp = ep->e_sess->s_ttyp)) { 843 ep->e_tdev = tp->t_dev; 844 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 845 ep->e_tsess = tp->t_session; 846 } else 847 ep->e_tdev = NODEV; 848 if (p->p_wmesg) 849 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 850 ep->e_xsize = ep->e_xrssize = 0; 851 ep->e_xccount = ep->e_xswrss = 0; 852 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 853 if (SESS_LEADER(p)) 854 ep->e_flag |= EPROC_SLEADER; 855 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 856 } 857
Indexes created Tue Sep 23 22:09:46 GMT 2025