kern_sysctl.c revision 1.43
1 /* $NetBSD: kern_sysctl.c,v 1.43 1999/03/24 05:51:25 mrg 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 uvm_vslock(p, SCARG(uap, old), oldlen); 167 savelen = oldlen; 168 } 169 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 170 &oldlen, SCARG(uap, new), SCARG(uap, newlen), p); 171 if (SCARG(uap, old) != NULL) { 172 if (dolock) 173 uvm_vsunlock(p, SCARG(uap, old), savelen); 174 memlock.sl_lock = 0; 175 if (memlock.sl_want) { 176 memlock.sl_want = 0; 177 wakeup((caddr_t)&memlock); 178 } 179 } 180 if (error) 181 return (error); 182 if (SCARG(uap, oldlenp)) 183 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 184 return (error); 185 } 186 187 /* 188 * Attributes stored in the kernel. 189 */ 190 char hostname[MAXHOSTNAMELEN]; 191 int hostnamelen; 192 char domainname[MAXHOSTNAMELEN]; 193 int domainnamelen; 194 long hostid; 195 #ifdef INSECURE 196 int securelevel = -1; 197 #else 198 int securelevel = 0; 199 #endif 200 #ifdef SHORTCORENAME 201 int shortcorename = 1; 202 #else 203 int shortcorename = 0; 204 #endif 205 206 /* 207 * kernel related system variables. 208 */ 209 int 210 kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 211 int *name; 212 u_int namelen; 213 void *oldp; 214 size_t *oldlenp; 215 void *newp; 216 size_t newlen; 217 struct proc *p; 218 { 219 int error, level, inthostid; 220 int old_autonicetime; 221 int old_vnodes; 222 int old_shortcorename; 223 extern char ostype[], osrelease[], version[]; 224 225 /* all sysctl names at this level are terminal */ 226 if (namelen != 1 && !(name[0] == KERN_PROC || name[0] == KERN_PROF)) 227 return (ENOTDIR); /* overloaded */ 228 229 switch (name[0]) { 230 case KERN_OSTYPE: 231 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 232 case KERN_OSRELEASE: 233 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 234 case KERN_OSREV: 235 return (sysctl_rdint(oldp, oldlenp, newp, NetBSD)); 236 case KERN_VERSION: 237 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 238 case KERN_MAXVNODES: 239 old_vnodes = desiredvnodes; 240 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 241 if (old_vnodes > desiredvnodes) { 242 desiredvnodes = old_vnodes; 243 return (EINVAL); 244 } 245 return (error); 246 case KERN_MAXPROC: 247 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 248 case KERN_MAXFILES: 249 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 250 case KERN_ARGMAX: 251 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 252 case KERN_SECURELVL: 253 level = securelevel; 254 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 255 newp == NULL) 256 return (error); 257 if (level < securelevel && p->p_pid != 1) 258 return (EPERM); 259 securelevel = level; 260 return (0); 261 case KERN_HOSTNAME: 262 error = sysctl_string(oldp, oldlenp, newp, newlen, 263 hostname, sizeof(hostname)); 264 if (newp && !error) 265 hostnamelen = newlen; 266 return (error); 267 case KERN_DOMAINNAME: 268 error = sysctl_string(oldp, oldlenp, newp, newlen, 269 domainname, sizeof(domainname)); 270 if (newp && !error) 271 domainnamelen = newlen; 272 return (error); 273 case KERN_HOSTID: 274 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 275 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 276 hostid = inthostid; 277 return (error); 278 case KERN_CLOCKRATE: 279 return (sysctl_clockrate(oldp, oldlenp)); 280 case KERN_BOOTTIME: 281 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 282 sizeof(struct timeval))); 283 case KERN_VNODE: 284 return (sysctl_vnode(oldp, oldlenp, p)); 285 case KERN_PROC: 286 return (sysctl_doproc(name + 1, namelen - 1, oldp, oldlenp)); 287 case KERN_FILE: 288 return (sysctl_file(oldp, oldlenp)); 289 #ifdef GPROF 290 case KERN_PROF: 291 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 292 newp, newlen)); 293 #endif 294 case KERN_POSIX1: 295 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 296 case KERN_NGROUPS: 297 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 298 case KERN_JOB_CONTROL: 299 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 300 case KERN_SAVED_IDS: 301 #ifdef _POSIX_SAVED_IDS 302 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 303 #else 304 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 305 #endif 306 case KERN_MAXPARTITIONS: 307 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 308 case KERN_RAWPARTITION: 309 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 310 #ifdef NTP 311 case KERN_NTPTIME: 312 return (sysctl_ntptime(oldp, oldlenp)); 313 #endif 314 case KERN_AUTONICETIME: 315 old_autonicetime = autonicetime; 316 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 317 if (autonicetime < 0) 318 autonicetime = old_autonicetime; 319 return (error); 320 case KERN_AUTONICEVAL: 321 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 322 if (autoniceval < PRIO_MIN) 323 autoniceval = PRIO_MIN; 324 if (autoniceval > PRIO_MAX) 325 autoniceval = PRIO_MAX; 326 return (error); 327 case KERN_RTC_OFFSET: 328 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 329 case KERN_ROOT_DEVICE: 330 return (sysctl_rdstring(oldp, oldlenp, newp, 331 root_device->dv_xname)); 332 case KERN_MSGBUFSIZE: 333 /* 334 * deal with cases where the message buffer has 335 * become corrupted. 336 */ 337 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 338 msgbufenabled = 0; 339 return (ENXIO); 340 } 341 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 342 case KERN_FSYNC: 343 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 344 case KERN_SYSVMSG: 345 #ifdef SYSVMSG 346 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 347 #else 348 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 349 #endif 350 case KERN_SYSVSEM: 351 #ifdef SYSVSEM 352 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 353 #else 354 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 355 #endif 356 case KERN_SYSVSHM: 357 #ifdef SYSVSHM 358 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 359 #else 360 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 361 #endif 362 case KERN_SHORTCORENAME: 363 /* Only allow values of zero or one. */ 364 old_shortcorename = shortcorename; 365 error = sysctl_int(oldp, oldlenp, newp, newlen, 366 &shortcorename); 367 if (shortcorename != 0 && shortcorename != 1) { 368 shortcorename = old_shortcorename; 369 return (EINVAL); 370 } 371 return (error); 372 case KERN_SYNCHRONIZED_IO: 373 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 374 case KERN_IOV_MAX: 375 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 376 default: 377 return (EOPNOTSUPP); 378 } 379 /* NOTREACHED */ 380 } 381 382 /* 383 * hardware related system variables. 384 */ 385 int 386 hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 387 int *name; 388 u_int namelen; 389 void *oldp; 390 size_t *oldlenp; 391 void *newp; 392 size_t newlen; 393 struct proc *p; 394 { 395 extern char machine[], machine_arch[], cpu_model[]; 396 397 /* all sysctl names at this level are terminal */ 398 if (namelen != 1) 399 return (ENOTDIR); /* overloaded */ 400 401 switch (name[0]) { 402 case HW_MACHINE: 403 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 404 case HW_MACHINE_ARCH: 405 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 406 case HW_MODEL: 407 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 408 case HW_NCPU: 409 return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */ 410 case HW_BYTEORDER: 411 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 412 case HW_PHYSMEM: 413 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 414 case HW_USERMEM: 415 return (sysctl_rdint(oldp, oldlenp, newp, 416 ctob(physmem - uvmexp.wired))); 417 case HW_PAGESIZE: 418 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 419 default: 420 return (EOPNOTSUPP); 421 } 422 /* NOTREACHED */ 423 } 424 425 #ifdef DEBUG 426 /* 427 * Debugging related system variables. 428 */ 429 struct ctldebug debug0, debug1, debug2, debug3, debug4; 430 struct ctldebug debug5, debug6, debug7, debug8, debug9; 431 struct ctldebug debug10, debug11, debug12, debug13, debug14; 432 struct ctldebug debug15, debug16, debug17, debug18, debug19; 433 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 434 &debug0, &debug1, &debug2, &debug3, &debug4, 435 &debug5, &debug6, &debug7, &debug8, &debug9, 436 &debug10, &debug11, &debug12, &debug13, &debug14, 437 &debug15, &debug16, &debug17, &debug18, &debug19, 438 }; 439 int 440 debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 441 int *name; 442 u_int namelen; 443 void *oldp; 444 size_t *oldlenp; 445 void *newp; 446 size_t newlen; 447 struct proc *p; 448 { 449 struct ctldebug *cdp; 450 451 /* all sysctl names at this level are name and field */ 452 if (namelen != 2) 453 return (ENOTDIR); /* overloaded */ 454 cdp = debugvars[name[0]]; 455 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 456 return (EOPNOTSUPP); 457 switch (name[1]) { 458 case CTL_DEBUG_NAME: 459 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 460 case CTL_DEBUG_VALUE: 461 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 462 default: 463 return (EOPNOTSUPP); 464 } 465 /* NOTREACHED */ 466 } 467 #endif /* DEBUG */ 468 469 /* 470 * Validate parameters and get old / set new parameters 471 * for an integer-valued sysctl function. 472 */ 473 int 474 sysctl_int(oldp, oldlenp, newp, newlen, valp) 475 void *oldp; 476 size_t *oldlenp; 477 void *newp; 478 size_t newlen; 479 int *valp; 480 { 481 int error = 0; 482 483 if (oldp && *oldlenp < sizeof(int)) 484 return (ENOMEM); 485 if (newp && newlen != sizeof(int)) 486 return (EINVAL); 487 *oldlenp = sizeof(int); 488 if (oldp) 489 error = copyout(valp, oldp, sizeof(int)); 490 if (error == 0 && newp) 491 error = copyin(newp, valp, sizeof(int)); 492 return (error); 493 } 494 495 /* 496 * As above, but read-only. 497 */ 498 int 499 sysctl_rdint(oldp, oldlenp, newp, val) 500 void *oldp; 501 size_t *oldlenp; 502 void *newp; 503 int val; 504 { 505 int error = 0; 506 507 if (oldp && *oldlenp < sizeof(int)) 508 return (ENOMEM); 509 if (newp) 510 return (EPERM); 511 *oldlenp = sizeof(int); 512 if (oldp) 513 error = copyout((caddr_t)&val, oldp, sizeof(int)); 514 return (error); 515 } 516 517 /* 518 * Validate parameters and get old / set new parameters 519 * for a string-valued sysctl function. 520 */ 521 int 522 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 523 void *oldp; 524 size_t *oldlenp; 525 void *newp; 526 size_t newlen; 527 char *str; 528 int maxlen; 529 { 530 int len, error = 0; 531 532 len = strlen(str) + 1; 533 if (oldp && *oldlenp < len) 534 return (ENOMEM); 535 if (newp && newlen >= maxlen) 536 return (EINVAL); 537 if (oldp) { 538 *oldlenp = len; 539 error = copyout(str, oldp, len); 540 } 541 if (error == 0 && newp) { 542 error = copyin(newp, str, newlen); 543 str[newlen] = 0; 544 } 545 return (error); 546 } 547 548 /* 549 * As above, but read-only. 550 */ 551 int 552 sysctl_rdstring(oldp, oldlenp, newp, str) 553 void *oldp; 554 size_t *oldlenp; 555 void *newp; 556 char *str; 557 { 558 int len, error = 0; 559 560 len = strlen(str) + 1; 561 if (oldp && *oldlenp < len) 562 return (ENOMEM); 563 if (newp) 564 return (EPERM); 565 *oldlenp = len; 566 if (oldp) 567 error = copyout(str, oldp, len); 568 return (error); 569 } 570 571 /* 572 * Validate parameters and get old / set new parameters 573 * for a structure oriented sysctl function. 574 */ 575 int 576 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 577 void *oldp; 578 size_t *oldlenp; 579 void *newp; 580 size_t newlen; 581 void *sp; 582 int len; 583 { 584 int error = 0; 585 586 if (oldp && *oldlenp < len) 587 return (ENOMEM); 588 if (newp && newlen > len) 589 return (EINVAL); 590 if (oldp) { 591 *oldlenp = len; 592 error = copyout(sp, oldp, len); 593 } 594 if (error == 0 && newp) 595 error = copyin(newp, sp, len); 596 return (error); 597 } 598 599 /* 600 * Validate parameters and get old parameters 601 * for a structure oriented sysctl function. 602 */ 603 int 604 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 605 void *oldp; 606 size_t *oldlenp; 607 void *newp, *sp; 608 int len; 609 { 610 int error = 0; 611 612 if (oldp && *oldlenp < len) 613 return (ENOMEM); 614 if (newp) 615 return (EPERM); 616 *oldlenp = len; 617 if (oldp) 618 error = copyout(sp, oldp, len); 619 return (error); 620 } 621 622 /* 623 * Get file structures. 624 */ 625 int 626 sysctl_file(where, sizep) 627 char *where; 628 size_t *sizep; 629 { 630 int buflen, error; 631 struct file *fp; 632 char *start = where; 633 634 buflen = *sizep; 635 if (where == NULL) { 636 /* 637 * overestimate by 10 files 638 */ 639 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 640 return (0); 641 } 642 643 /* 644 * first copyout filehead 645 */ 646 if (buflen < sizeof(filehead)) { 647 *sizep = 0; 648 return (0); 649 } 650 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 651 if (error) 652 return (error); 653 buflen -= sizeof(filehead); 654 where += sizeof(filehead); 655 656 /* 657 * followed by an array of file structures 658 */ 659 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 660 if (buflen < sizeof(struct file)) { 661 *sizep = where - start; 662 return (ENOMEM); 663 } 664 error = copyout((caddr_t)fp, where, sizeof(struct file)); 665 if (error) 666 return (error); 667 buflen -= sizeof(struct file); 668 where += sizeof(struct file); 669 } 670 *sizep = where - start; 671 return (0); 672 } 673 674 /* 675 * try over estimating by 5 procs 676 */ 677 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 678 679 int 680 sysctl_doproc(name, namelen, where, sizep) 681 int *name; 682 u_int namelen; 683 char *where; 684 size_t *sizep; 685 { 686 register struct proc *p; 687 register struct kinfo_proc *dp = (struct kinfo_proc *)where; 688 register int needed = 0; 689 int buflen = where != NULL ? *sizep : 0; 690 const struct proclist_desc *pd; 691 struct eproc eproc; 692 int error = 0; 693 694 if (namelen != 2 && !(namelen == 1 && name[0] == KERN_PROC_ALL)) 695 return (EINVAL); 696 697 pd = proclists; 698 again: 699 for (p = LIST_FIRST(pd->pd_list); p != NULL; 700 p = LIST_NEXT(p, p_list)) { 701 /* 702 * Skip embryonic processes. 703 */ 704 if (p->p_stat == SIDL) 705 continue; 706 /* 707 * TODO - make more efficient (see notes below). 708 * do by session. 709 */ 710 switch (name[0]) { 711 712 case KERN_PROC_PID: 713 /* could do this with just a lookup */ 714 if (p->p_pid != (pid_t)name[1]) 715 continue; 716 break; 717 718 case KERN_PROC_PGRP: 719 /* could do this by traversing pgrp */ 720 if (p->p_pgrp->pg_id != (pid_t)name[1]) 721 continue; 722 break; 723 724 case KERN_PROC_TTY: 725 if ((p->p_flag & P_CONTROLT) == 0 || 726 p->p_session->s_ttyp == NULL || 727 p->p_session->s_ttyp->t_dev != (dev_t)name[1]) 728 continue; 729 break; 730 731 case KERN_PROC_UID: 732 if (p->p_ucred->cr_uid != (uid_t)name[1]) 733 continue; 734 break; 735 736 case KERN_PROC_RUID: 737 if (p->p_cred->p_ruid != (uid_t)name[1]) 738 continue; 739 break; 740 } 741 if (buflen >= sizeof(struct kinfo_proc)) { 742 fill_eproc(p, &eproc); 743 error = copyout((caddr_t)p, &dp->kp_proc, 744 sizeof(struct proc)); 745 if (error) 746 return (error); 747 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 748 sizeof(eproc)); 749 if (error) 750 return (error); 751 dp++; 752 buflen -= sizeof(struct kinfo_proc); 753 } 754 needed += sizeof(struct kinfo_proc); 755 } 756 pd++; 757 if (pd->pd_list != NULL) 758 goto again; 759 760 if (where != NULL) { 761 *sizep = (caddr_t)dp - where; 762 if (needed > *sizep) 763 return (ENOMEM); 764 } else { 765 needed += KERN_PROCSLOP; 766 *sizep = needed; 767 } 768 return (0); 769 } 770 771 /* 772 * Fill in an eproc structure for the specified process. 773 */ 774 void 775 fill_eproc(p, ep) 776 register struct proc *p; 777 register struct eproc *ep; 778 { 779 register struct tty *tp; 780 781 ep->e_paddr = p; 782 ep->e_sess = p->p_pgrp->pg_session; 783 ep->e_pcred = *p->p_cred; 784 ep->e_ucred = *p->p_ucred; 785 if (p->p_stat == SIDL || p->p_stat == SZOMB) { 786 ep->e_vm.vm_rssize = 0; 787 ep->e_vm.vm_tsize = 0; 788 ep->e_vm.vm_dsize = 0; 789 ep->e_vm.vm_ssize = 0; 790 /* ep->e_vm.vm_pmap = XXX; */ 791 } else { 792 register struct vmspace *vm = p->p_vmspace; 793 794 ep->e_vm.vm_rssize = vm_resident_count(vm); 795 ep->e_vm.vm_tsize = vm->vm_tsize; 796 ep->e_vm.vm_dsize = vm->vm_dsize; 797 ep->e_vm.vm_ssize = vm->vm_ssize; 798 } 799 if (p->p_pptr) 800 ep->e_ppid = p->p_pptr->p_pid; 801 else 802 ep->e_ppid = 0; 803 ep->e_pgid = p->p_pgrp->pg_id; 804 ep->e_sid = ep->e_sess->s_sid; 805 ep->e_jobc = p->p_pgrp->pg_jobc; 806 if ((p->p_flag & P_CONTROLT) && 807 (tp = ep->e_sess->s_ttyp)) { 808 ep->e_tdev = tp->t_dev; 809 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 810 ep->e_tsess = tp->t_session; 811 } else 812 ep->e_tdev = NODEV; 813 if (p->p_wmesg) 814 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 815 ep->e_xsize = ep->e_xrssize = 0; 816 ep->e_xccount = ep->e_xswrss = 0; 817 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 818 if (SESS_LEADER(p)) 819 ep->e_flag |= EPROC_SLEADER; 820 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 821 } 822 823
Indexes created Tue Sep 30 11:09:46 GMT 2025