kern_sysctl.c revision 1.41
1 /* $NetBSD: kern_sysctl.c,v 1.41 1998/09/08 23:50:14 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_uvm.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 #if defined(UVM) 68 #include <uvm/uvm_extern.h> 69 #endif 70 71 #include <sys/mount.h> 72 #include <sys/syscallargs.h> 73 74 #if defined(UVM) 75 #include <uvm/uvm_extern.h> 76 #endif 77 78 #if defined(DDB) 79 #include <ddb/ddbvar.h> 80 #endif 81 82 /* 83 * Locking and stats 84 */ 85 static struct sysctl_lock { 86 int sl_lock; 87 int sl_want; 88 int sl_locked; 89 } memlock; 90 91 int 92 sys___sysctl(p, v, retval) 93 struct proc *p; 94 void *v; 95 register_t *retval; 96 { 97 register struct sys___sysctl_args /* { 98 syscallarg(int *) name; 99 syscallarg(u_int) namelen; 100 syscallarg(void *) old; 101 syscallarg(size_t *) oldlenp; 102 syscallarg(void *) new; 103 syscallarg(size_t) newlen; 104 } */ *uap = v; 105 int error, dolock = 1; 106 size_t savelen = 0, oldlen = 0; 107 sysctlfn *fn; 108 int name[CTL_MAXNAME]; 109 110 if (SCARG(uap, new) != NULL && 111 (error = suser(p->p_ucred, &p->p_acflag))) 112 return (error); 113 /* 114 * all top-level sysctl names are non-terminal 115 */ 116 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 117 return (EINVAL); 118 error = copyin(SCARG(uap, name), &name, 119 SCARG(uap, namelen) * sizeof(int)); 120 if (error) 121 return (error); 122 123 switch (name[0]) { 124 case CTL_KERN: 125 fn = kern_sysctl; 126 if (name[2] != KERN_VNODE) /* XXX */ 127 dolock = 0; 128 break; 129 case CTL_HW: 130 fn = hw_sysctl; 131 break; 132 case CTL_VM: 133 #if defined(UVM) 134 fn = uvm_sysctl; 135 #else 136 fn = vm_sysctl; 137 #endif 138 break; 139 case CTL_NET: 140 fn = net_sysctl; 141 break; 142 case CTL_VFS: 143 fn = vfs_sysctl; 144 break; 145 case CTL_MACHDEP: 146 fn = cpu_sysctl; 147 break; 148 #ifdef DEBUG 149 case CTL_DEBUG: 150 fn = debug_sysctl; 151 break; 152 #endif 153 #ifdef DDB 154 case CTL_DDB: 155 fn = ddb_sysctl; 156 break; 157 #endif 158 default: 159 return (EOPNOTSUPP); 160 } 161 162 if (SCARG(uap, oldlenp) && 163 (error = copyin(SCARG(uap, oldlenp), &oldlen, sizeof(oldlen)))) 164 return (error); 165 if (SCARG(uap, old) != NULL) { 166 #if defined(UVM) 167 if (!uvm_useracc(SCARG(uap, old), oldlen, B_WRITE)) 168 #else 169 if (!useracc(SCARG(uap, old), oldlen, B_WRITE)) 170 #endif 171 return (EFAULT); 172 while (memlock.sl_lock) { 173 memlock.sl_want = 1; 174 sleep((caddr_t)&memlock, PRIBIO+1); 175 memlock.sl_locked++; 176 } 177 memlock.sl_lock = 1; 178 if (dolock) 179 #if defined(UVM) 180 uvm_vslock(p, SCARG(uap, old), oldlen); 181 #else 182 vslock(p, SCARG(uap, old), oldlen); 183 #endif 184 savelen = oldlen; 185 } 186 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 187 &oldlen, SCARG(uap, new), SCARG(uap, newlen), p); 188 if (SCARG(uap, old) != NULL) { 189 if (dolock) 190 #if defined(UVM) 191 uvm_vsunlock(p, SCARG(uap, old), savelen); 192 #else 193 vsunlock(p, SCARG(uap, old), savelen); 194 #endif 195 memlock.sl_lock = 0; 196 if (memlock.sl_want) { 197 memlock.sl_want = 0; 198 wakeup((caddr_t)&memlock); 199 } 200 } 201 if (error) 202 return (error); 203 if (SCARG(uap, oldlenp)) 204 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 205 return (error); 206 } 207 208 /* 209 * Attributes stored in the kernel. 210 */ 211 char hostname[MAXHOSTNAMELEN]; 212 int hostnamelen; 213 char domainname[MAXHOSTNAMELEN]; 214 int domainnamelen; 215 long hostid; 216 #ifdef INSECURE 217 int securelevel = -1; 218 #else 219 int securelevel = 0; 220 #endif 221 #ifdef SHORTCORENAME 222 int shortcorename = 1; 223 #else 224 int shortcorename = 0; 225 #endif 226 227 /* 228 * kernel related system variables. 229 */ 230 int 231 kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 232 int *name; 233 u_int namelen; 234 void *oldp; 235 size_t *oldlenp; 236 void *newp; 237 size_t newlen; 238 struct proc *p; 239 { 240 int error, level, inthostid; 241 int old_autonicetime; 242 int old_vnodes; 243 int old_shortcorename; 244 extern char ostype[], osrelease[], version[]; 245 246 /* all sysctl names at this level are terminal */ 247 if (namelen != 1 && !(name[0] == KERN_PROC || name[0] == KERN_PROF)) 248 return (ENOTDIR); /* overloaded */ 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 default: 398 return (EOPNOTSUPP); 399 } 400 /* NOTREACHED */ 401 } 402 403 /* 404 * hardware related system variables. 405 */ 406 int 407 hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 408 int *name; 409 u_int namelen; 410 void *oldp; 411 size_t *oldlenp; 412 void *newp; 413 size_t newlen; 414 struct proc *p; 415 { 416 extern char machine[], machine_arch[], cpu_model[]; 417 418 /* all sysctl names at this level are terminal */ 419 if (namelen != 1) 420 return (ENOTDIR); /* overloaded */ 421 422 switch (name[0]) { 423 case HW_MACHINE: 424 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 425 case HW_MACHINE_ARCH: 426 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 427 case HW_MODEL: 428 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 429 case HW_NCPU: 430 return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */ 431 case HW_BYTEORDER: 432 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 433 case HW_PHYSMEM: 434 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 435 case HW_USERMEM: 436 #if defined(UVM) 437 return (sysctl_rdint(oldp, oldlenp, newp, 438 ctob(physmem - uvmexp.wired))); 439 #else 440 return (sysctl_rdint(oldp, oldlenp, newp, 441 ctob(physmem - cnt.v_wire_count))); 442 #endif 443 case HW_PAGESIZE: 444 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 445 default: 446 return (EOPNOTSUPP); 447 } 448 /* NOTREACHED */ 449 } 450 451 #ifdef DEBUG 452 /* 453 * Debugging related system variables. 454 */ 455 struct ctldebug debug0, debug1, debug2, debug3, debug4; 456 struct ctldebug debug5, debug6, debug7, debug8, debug9; 457 struct ctldebug debug10, debug11, debug12, debug13, debug14; 458 struct ctldebug debug15, debug16, debug17, debug18, debug19; 459 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 460 &debug0, &debug1, &debug2, &debug3, &debug4, 461 &debug5, &debug6, &debug7, &debug8, &debug9, 462 &debug10, &debug11, &debug12, &debug13, &debug14, 463 &debug15, &debug16, &debug17, &debug18, &debug19, 464 }; 465 int 466 debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 467 int *name; 468 u_int namelen; 469 void *oldp; 470 size_t *oldlenp; 471 void *newp; 472 size_t newlen; 473 struct proc *p; 474 { 475 struct ctldebug *cdp; 476 477 /* all sysctl names at this level are name and field */ 478 if (namelen != 2) 479 return (ENOTDIR); /* overloaded */ 480 cdp = debugvars[name[0]]; 481 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 482 return (EOPNOTSUPP); 483 switch (name[1]) { 484 case CTL_DEBUG_NAME: 485 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 486 case CTL_DEBUG_VALUE: 487 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 488 default: 489 return (EOPNOTSUPP); 490 } 491 /* NOTREACHED */ 492 } 493 #endif /* DEBUG */ 494 495 /* 496 * Validate parameters and get old / set new parameters 497 * for an integer-valued sysctl function. 498 */ 499 int 500 sysctl_int(oldp, oldlenp, newp, newlen, valp) 501 void *oldp; 502 size_t *oldlenp; 503 void *newp; 504 size_t newlen; 505 int *valp; 506 { 507 int error = 0; 508 509 if (oldp && *oldlenp < sizeof(int)) 510 return (ENOMEM); 511 if (newp && newlen != sizeof(int)) 512 return (EINVAL); 513 *oldlenp = sizeof(int); 514 if (oldp) 515 error = copyout(valp, oldp, sizeof(int)); 516 if (error == 0 && newp) 517 error = copyin(newp, valp, sizeof(int)); 518 return (error); 519 } 520 521 /* 522 * As above, but read-only. 523 */ 524 int 525 sysctl_rdint(oldp, oldlenp, newp, val) 526 void *oldp; 527 size_t *oldlenp; 528 void *newp; 529 int val; 530 { 531 int error = 0; 532 533 if (oldp && *oldlenp < sizeof(int)) 534 return (ENOMEM); 535 if (newp) 536 return (EPERM); 537 *oldlenp = sizeof(int); 538 if (oldp) 539 error = copyout((caddr_t)&val, oldp, sizeof(int)); 540 return (error); 541 } 542 543 /* 544 * Validate parameters and get old / set new parameters 545 * for a string-valued sysctl function. 546 */ 547 int 548 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 549 void *oldp; 550 size_t *oldlenp; 551 void *newp; 552 size_t newlen; 553 char *str; 554 int maxlen; 555 { 556 int len, error = 0; 557 558 len = strlen(str) + 1; 559 if (oldp && *oldlenp < len) 560 return (ENOMEM); 561 if (newp && newlen >= maxlen) 562 return (EINVAL); 563 if (oldp) { 564 *oldlenp = len; 565 error = copyout(str, oldp, len); 566 } 567 if (error == 0 && newp) { 568 error = copyin(newp, str, newlen); 569 str[newlen] = 0; 570 } 571 return (error); 572 } 573 574 /* 575 * As above, but read-only. 576 */ 577 int 578 sysctl_rdstring(oldp, oldlenp, newp, str) 579 void *oldp; 580 size_t *oldlenp; 581 void *newp; 582 char *str; 583 { 584 int len, error = 0; 585 586 len = strlen(str) + 1; 587 if (oldp && *oldlenp < len) 588 return (ENOMEM); 589 if (newp) 590 return (EPERM); 591 *oldlenp = len; 592 if (oldp) 593 error = copyout(str, oldp, len); 594 return (error); 595 } 596 597 /* 598 * Validate parameters and get old / set new parameters 599 * for a structure oriented sysctl function. 600 */ 601 int 602 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 603 void *oldp; 604 size_t *oldlenp; 605 void *newp; 606 size_t newlen; 607 void *sp; 608 int len; 609 { 610 int error = 0; 611 612 if (oldp && *oldlenp < len) 613 return (ENOMEM); 614 if (newp && newlen > len) 615 return (EINVAL); 616 if (oldp) { 617 *oldlenp = len; 618 error = copyout(sp, oldp, len); 619 } 620 if (error == 0 && newp) 621 error = copyin(newp, sp, len); 622 return (error); 623 } 624 625 /* 626 * Validate parameters and get old parameters 627 * for a structure oriented sysctl function. 628 */ 629 int 630 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 631 void *oldp; 632 size_t *oldlenp; 633 void *newp, *sp; 634 int len; 635 { 636 int error = 0; 637 638 if (oldp && *oldlenp < len) 639 return (ENOMEM); 640 if (newp) 641 return (EPERM); 642 *oldlenp = len; 643 if (oldp) 644 error = copyout(sp, oldp, len); 645 return (error); 646 } 647 648 /* 649 * Get file structures. 650 */ 651 int 652 sysctl_file(where, sizep) 653 char *where; 654 size_t *sizep; 655 { 656 int buflen, error; 657 struct file *fp; 658 char *start = where; 659 660 buflen = *sizep; 661 if (where == NULL) { 662 /* 663 * overestimate by 10 files 664 */ 665 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 666 return (0); 667 } 668 669 /* 670 * first copyout filehead 671 */ 672 if (buflen < sizeof(filehead)) { 673 *sizep = 0; 674 return (0); 675 } 676 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 677 if (error) 678 return (error); 679 buflen -= sizeof(filehead); 680 where += sizeof(filehead); 681 682 /* 683 * followed by an array of file structures 684 */ 685 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 686 if (buflen < sizeof(struct file)) { 687 *sizep = where - start; 688 return (ENOMEM); 689 } 690 error = copyout((caddr_t)fp, where, sizeof(struct file)); 691 if (error) 692 return (error); 693 buflen -= sizeof(struct file); 694 where += sizeof(struct file); 695 } 696 *sizep = where - start; 697 return (0); 698 } 699 700 /* 701 * try over estimating by 5 procs 702 */ 703 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 704 705 int 706 sysctl_doproc(name, namelen, where, sizep) 707 int *name; 708 u_int namelen; 709 char *where; 710 size_t *sizep; 711 { 712 register struct proc *p; 713 register struct kinfo_proc *dp = (struct kinfo_proc *)where; 714 register int needed = 0; 715 int buflen = where != NULL ? *sizep : 0; 716 const struct proclist_desc *pd; 717 struct eproc eproc; 718 int error = 0; 719 720 if (namelen != 2 && !(namelen == 1 && name[0] == KERN_PROC_ALL)) 721 return (EINVAL); 722 723 pd = proclists; 724 again: 725 for (p = LIST_FIRST(pd->pd_list); p != NULL; 726 p = LIST_NEXT(p, p_list)) { 727 /* 728 * Skip embryonic processes. 729 */ 730 if (p->p_stat == SIDL) 731 continue; 732 /* 733 * TODO - make more efficient (see notes below). 734 * do by session. 735 */ 736 switch (name[0]) { 737 738 case KERN_PROC_PID: 739 /* could do this with just a lookup */ 740 if (p->p_pid != (pid_t)name[1]) 741 continue; 742 break; 743 744 case KERN_PROC_PGRP: 745 /* could do this by traversing pgrp */ 746 if (p->p_pgrp->pg_id != (pid_t)name[1]) 747 continue; 748 break; 749 750 case KERN_PROC_TTY: 751 if ((p->p_flag & P_CONTROLT) == 0 || 752 p->p_session->s_ttyp == NULL || 753 p->p_session->s_ttyp->t_dev != (dev_t)name[1]) 754 continue; 755 break; 756 757 case KERN_PROC_UID: 758 if (p->p_ucred->cr_uid != (uid_t)name[1]) 759 continue; 760 break; 761 762 case KERN_PROC_RUID: 763 if (p->p_cred->p_ruid != (uid_t)name[1]) 764 continue; 765 break; 766 } 767 if (buflen >= sizeof(struct kinfo_proc)) { 768 fill_eproc(p, &eproc); 769 error = copyout((caddr_t)p, &dp->kp_proc, 770 sizeof(struct proc)); 771 if (error) 772 return (error); 773 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 774 sizeof(eproc)); 775 if (error) 776 return (error); 777 dp++; 778 buflen -= sizeof(struct kinfo_proc); 779 } 780 needed += sizeof(struct kinfo_proc); 781 } 782 pd++; 783 if (pd->pd_list != NULL) 784 goto again; 785 786 if (where != NULL) { 787 *sizep = (caddr_t)dp - where; 788 if (needed > *sizep) 789 return (ENOMEM); 790 } else { 791 needed += KERN_PROCSLOP; 792 *sizep = needed; 793 } 794 return (0); 795 } 796 797 /* 798 * Fill in an eproc structure for the specified process. 799 */ 800 void 801 fill_eproc(p, ep) 802 register struct proc *p; 803 register struct eproc *ep; 804 { 805 register struct tty *tp; 806 807 ep->e_paddr = p; 808 ep->e_sess = p->p_pgrp->pg_session; 809 ep->e_pcred = *p->p_cred; 810 ep->e_ucred = *p->p_ucred; 811 if (p->p_stat == SIDL || p->p_stat == SZOMB) { 812 ep->e_vm.vm_rssize = 0; 813 ep->e_vm.vm_tsize = 0; 814 ep->e_vm.vm_dsize = 0; 815 ep->e_vm.vm_ssize = 0; 816 /* ep->e_vm.vm_pmap = XXX; */ 817 } else { 818 register struct vmspace *vm = p->p_vmspace; 819 820 ep->e_vm.vm_rssize = vm_resident_count(vm); 821 ep->e_vm.vm_tsize = vm->vm_tsize; 822 ep->e_vm.vm_dsize = vm->vm_dsize; 823 ep->e_vm.vm_ssize = vm->vm_ssize; 824 } 825 if (p->p_pptr) 826 ep->e_ppid = p->p_pptr->p_pid; 827 else 828 ep->e_ppid = 0; 829 ep->e_pgid = p->p_pgrp->pg_id; 830 ep->e_sid = ep->e_sess->s_sid; 831 ep->e_jobc = p->p_pgrp->pg_jobc; 832 if ((p->p_flag & P_CONTROLT) && 833 (tp = ep->e_sess->s_ttyp)) { 834 ep->e_tdev = tp->t_dev; 835 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 836 ep->e_tsess = tp->t_session; 837 } else 838 ep->e_tdev = NODEV; 839 if (p->p_wmesg) 840 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 841 ep->e_xsize = ep->e_xrssize = 0; 842 ep->e_xccount = ep->e_xswrss = 0; 843 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 844 if (SESS_LEADER(p)) 845 ep->e_flag |= EPROC_SLEADER; 846 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 847 } 848 849
Indexes created Tue Sep 30 07:10:03 GMT 2025