kern_sysctl.c revision 1.75
1 /* $NetBSD: kern_sysctl.c,v 1.75 2000/07/14 07:21:22 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_defcorename.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/buf.h> 54 #include <sys/device.h> 55 #include <sys/disklabel.h> 56 #include <sys/dkstat.h> 57 #include <sys/exec.h> 58 #include <sys/file.h> 59 #include <sys/ioctl.h> 60 #include <sys/malloc.h> 61 #include <sys/mount.h> 62 #include <sys/msgbuf.h> 63 #include <sys/pool.h> 64 #include <sys/proc.h> 65 #include <sys/resource.h> 66 #include <sys/resourcevar.h> 67 #include <sys/syscallargs.h> 68 #include <sys/tty.h> 69 #include <sys/unistd.h> 70 #include <sys/vnode.h> 71 #define __SYSCTL_PRIVATE 72 #include <sys/sysctl.h> 73 #include <sys/lock.h> 74 75 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 76 #include <sys/ipc.h> 77 #endif 78 #ifdef SYSVMSG 79 #include <sys/msg.h> 80 #endif 81 #ifdef SYSVSEM 82 #include <sys/sem.h> 83 #endif 84 #ifdef SYSVSHM 85 #include <sys/shm.h> 86 #endif 87 88 #include <dev/cons.h> 89 90 #if defined(DDB) 91 #include <ddb/ddbvar.h> 92 #endif 93 94 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 95 96 static int sysctl_file __P((void *, size_t *)); 97 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 98 static int sysctl_sysvipc __P((int *, u_int, void *, size_t *)); 99 #endif 100 static int sysctl_msgbuf __P((void *, size_t *)); 101 static int sysctl_doeproc __P((int *, u_int, void *, size_t *)); 102 static void fill_kproc2 __P((struct proc *, struct kinfo_proc2 *)); 103 static int sysctl_procargs __P((int *, u_int, void *, size_t *, struct proc *)); 104 105 /* 106 * The `sysctl_memlock' is intended to keep too many processes from 107 * locking down memory by doing sysctls at once. Whether or not this 108 * is really a good idea to worry about it probably a subject of some 109 * debate. 110 */ 111 struct lock sysctl_memlock; 112 113 void 114 sysctl_init(void) 115 { 116 117 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 118 } 119 120 int 121 sys___sysctl(p, v, retval) 122 struct proc *p; 123 void *v; 124 register_t *retval; 125 { 126 struct sys___sysctl_args /* { 127 syscallarg(int *) name; 128 syscallarg(u_int) namelen; 129 syscallarg(void *) old; 130 syscallarg(size_t *) oldlenp; 131 syscallarg(void *) new; 132 syscallarg(size_t) newlen; 133 } */ *uap = v; 134 int error; 135 size_t savelen = 0, oldlen = 0; 136 sysctlfn *fn; 137 int name[CTL_MAXNAME]; 138 size_t *oldlenp; 139 140 /* 141 * all top-level sysctl names are non-terminal 142 */ 143 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 144 return (EINVAL); 145 error = copyin(SCARG(uap, name), &name, 146 SCARG(uap, namelen) * sizeof(int)); 147 if (error) 148 return (error); 149 150 /* 151 * For all but CTL_PROC, must be root to change a value. 152 * For CTL_PROC, must be root, or owner of the proc (and not suid), 153 * this is checked in proc_sysctl() (once we know the targer proc). 154 */ 155 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 156 (error = suser(p->p_ucred, &p->p_acflag))) 157 return error; 158 159 switch (name[0]) { 160 case CTL_KERN: 161 fn = kern_sysctl; 162 break; 163 case CTL_HW: 164 fn = hw_sysctl; 165 break; 166 case CTL_VM: 167 fn = uvm_sysctl; 168 break; 169 case CTL_NET: 170 fn = net_sysctl; 171 break; 172 case CTL_VFS: 173 fn = vfs_sysctl; 174 break; 175 case CTL_MACHDEP: 176 fn = cpu_sysctl; 177 break; 178 #ifdef DEBUG 179 case CTL_DEBUG: 180 fn = debug_sysctl; 181 break; 182 #endif 183 #ifdef DDB 184 case CTL_DDB: 185 fn = ddb_sysctl; 186 break; 187 #endif 188 case CTL_PROC: 189 fn = proc_sysctl; 190 break; 191 default: 192 return (EOPNOTSUPP); 193 } 194 195 /* 196 * XXX Hey, we wire `old', but what about `new'? 197 */ 198 199 oldlenp = SCARG(uap, oldlenp); 200 if (oldlenp) { 201 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 202 return (error); 203 oldlenp = &oldlen; 204 } 205 if (SCARG(uap, old) != NULL) { 206 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 207 if (error) 208 return (error); 209 if (uvm_vslock(p, SCARG(uap, old), oldlen, 210 VM_PROT_READ|VM_PROT_WRITE) != KERN_SUCCESS) { 211 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 212 return (EFAULT); 213 } 214 savelen = oldlen; 215 } 216 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 217 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 218 if (SCARG(uap, old) != NULL) { 219 uvm_vsunlock(p, SCARG(uap, old), savelen); 220 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 221 } 222 if (error) 223 return (error); 224 if (SCARG(uap, oldlenp)) 225 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 226 return (error); 227 } 228 229 /* 230 * Attributes stored in the kernel. 231 */ 232 char hostname[MAXHOSTNAMELEN]; 233 int hostnamelen; 234 235 char domainname[MAXHOSTNAMELEN]; 236 int domainnamelen; 237 238 long hostid; 239 240 #ifdef INSECURE 241 int securelevel = -1; 242 #else 243 int securelevel = 0; 244 #endif 245 246 #ifndef DEFCORENAME 247 #define DEFCORENAME "%n.core" 248 #endif 249 char defcorename[MAXPATHLEN] = DEFCORENAME; 250 int defcorenamelen = sizeof(DEFCORENAME); 251 252 extern int kern_logsigexit; 253 extern fixpt_t ccpu; 254 255 /* 256 * kernel related system variables. 257 */ 258 int 259 kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 260 int *name; 261 u_int namelen; 262 void *oldp; 263 size_t *oldlenp; 264 void *newp; 265 size_t newlen; 266 struct proc *p; 267 { 268 int error, level, inthostid; 269 int old_autonicetime; 270 int old_vnodes; 271 dev_t consdev; 272 273 /* All sysctl names at this level, except for a few, are terminal. */ 274 switch (name[0]) { 275 case KERN_PROC: 276 case KERN_PROC2: 277 case KERN_PROF: 278 case KERN_MBUF: 279 case KERN_PROC_ARGS: 280 case KERN_SYSVIPC_INFO: 281 /* Not terminal. */ 282 break; 283 default: 284 if (namelen != 1) 285 return (ENOTDIR); /* overloaded */ 286 } 287 288 switch (name[0]) { 289 case KERN_OSTYPE: 290 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 291 case KERN_OSRELEASE: 292 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 293 case KERN_OSREV: 294 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 295 case KERN_VERSION: 296 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 297 case KERN_MAXVNODES: 298 old_vnodes = desiredvnodes; 299 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 300 if (old_vnodes > desiredvnodes) { 301 desiredvnodes = old_vnodes; 302 return (EINVAL); 303 } 304 return (error); 305 case KERN_MAXPROC: 306 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 307 case KERN_MAXFILES: 308 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 309 case KERN_ARGMAX: 310 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 311 case KERN_SECURELVL: 312 level = securelevel; 313 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 314 newp == NULL) 315 return (error); 316 if (level < securelevel && p->p_pid != 1) 317 return (EPERM); 318 securelevel = level; 319 return (0); 320 case KERN_HOSTNAME: 321 error = sysctl_string(oldp, oldlenp, newp, newlen, 322 hostname, sizeof(hostname)); 323 if (newp && !error) 324 hostnamelen = newlen; 325 return (error); 326 case KERN_DOMAINNAME: 327 error = sysctl_string(oldp, oldlenp, newp, newlen, 328 domainname, sizeof(domainname)); 329 if (newp && !error) 330 domainnamelen = newlen; 331 return (error); 332 case KERN_HOSTID: 333 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 334 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 335 hostid = inthostid; 336 return (error); 337 case KERN_CLOCKRATE: 338 return (sysctl_clockrate(oldp, oldlenp)); 339 case KERN_BOOTTIME: 340 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 341 sizeof(struct timeval))); 342 case KERN_VNODE: 343 return (sysctl_vnode(oldp, oldlenp, p)); 344 case KERN_PROC: 345 case KERN_PROC2: 346 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 347 case KERN_PROC_ARGS: 348 return (sysctl_procargs(name + 1, namelen - 1, 349 oldp, oldlenp, p)); 350 case KERN_FILE: 351 return (sysctl_file(oldp, oldlenp)); 352 #ifdef GPROF 353 case KERN_PROF: 354 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 355 newp, newlen)); 356 #endif 357 case KERN_POSIX1: 358 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 359 case KERN_NGROUPS: 360 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 361 case KERN_JOB_CONTROL: 362 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 363 case KERN_SAVED_IDS: 364 #ifdef _POSIX_SAVED_IDS 365 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 366 #else 367 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 368 #endif 369 case KERN_MAXPARTITIONS: 370 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 371 case KERN_RAWPARTITION: 372 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 373 #ifdef NTP 374 case KERN_NTPTIME: 375 return (sysctl_ntptime(oldp, oldlenp)); 376 #endif 377 case KERN_AUTONICETIME: 378 old_autonicetime = autonicetime; 379 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 380 if (autonicetime < 0) 381 autonicetime = old_autonicetime; 382 return (error); 383 case KERN_AUTONICEVAL: 384 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 385 if (autoniceval < PRIO_MIN) 386 autoniceval = PRIO_MIN; 387 if (autoniceval > PRIO_MAX) 388 autoniceval = PRIO_MAX; 389 return (error); 390 case KERN_RTC_OFFSET: 391 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 392 case KERN_ROOT_DEVICE: 393 return (sysctl_rdstring(oldp, oldlenp, newp, 394 root_device->dv_xname)); 395 case KERN_MSGBUFSIZE: 396 /* 397 * deal with cases where the message buffer has 398 * become corrupted. 399 */ 400 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 401 msgbufenabled = 0; 402 return (ENXIO); 403 } 404 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 405 case KERN_FSYNC: 406 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 407 case KERN_SYSVMSG: 408 #ifdef SYSVMSG 409 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 410 #else 411 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 412 #endif 413 case KERN_SYSVSEM: 414 #ifdef SYSVSEM 415 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 416 #else 417 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 418 #endif 419 case KERN_SYSVSHM: 420 #ifdef SYSVSHM 421 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 422 #else 423 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 424 #endif 425 case KERN_DEFCORENAME: 426 if (newp && newlen < 1) 427 return (EINVAL); 428 error = sysctl_string(oldp, oldlenp, newp, newlen, 429 defcorename, sizeof(defcorename)); 430 if (newp && !error) 431 defcorenamelen = newlen; 432 return (error); 433 case KERN_SYNCHRONIZED_IO: 434 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 435 case KERN_IOV_MAX: 436 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 437 case KERN_MBUF: 438 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 439 newp, newlen)); 440 case KERN_MAPPED_FILES: 441 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 442 case KERN_MEMLOCK: 443 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 444 case KERN_MEMLOCK_RANGE: 445 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 446 case KERN_MEMORY_PROTECTION: 447 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 448 case KERN_LOGIN_NAME_MAX: 449 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 450 case KERN_LOGSIGEXIT: 451 return (sysctl_int(oldp, oldlenp, newp, newlen, 452 &kern_logsigexit)); 453 case KERN_FSCALE: 454 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 455 case KERN_CCPU: 456 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 457 case KERN_CP_TIME: 458 /* XXXSMP: WRONG! */ 459 return (sysctl_rdstruct(oldp, oldlenp, newp, 460 curcpu()->ci_schedstate.spc_cp_time, 461 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 462 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 463 case KERN_SYSVIPC_INFO: 464 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 465 #endif 466 case KERN_MSGBUF: 467 return (sysctl_msgbuf(oldp, oldlenp)); 468 case KERN_CONSDEV: 469 if (cn_tab != NULL) 470 consdev = cn_tab->cn_dev; 471 else 472 consdev = NODEV; 473 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 474 sizeof consdev)); 475 default: 476 return (EOPNOTSUPP); 477 } 478 /* NOTREACHED */ 479 } 480 481 /* 482 * hardware related system variables. 483 */ 484 int 485 hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 486 int *name; 487 u_int namelen; 488 void *oldp; 489 size_t *oldlenp; 490 void *newp; 491 size_t newlen; 492 struct proc *p; 493 { 494 495 /* all sysctl names at this level are terminal */ 496 if (namelen != 1) 497 return (ENOTDIR); /* overloaded */ 498 499 switch (name[0]) { 500 case HW_MACHINE: 501 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 502 case HW_MACHINE_ARCH: 503 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 504 case HW_MODEL: 505 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 506 case HW_NCPU: 507 return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */ 508 case HW_BYTEORDER: 509 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 510 case HW_PHYSMEM: 511 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 512 case HW_USERMEM: 513 return (sysctl_rdint(oldp, oldlenp, newp, 514 ctob(physmem - uvmexp.wired))); 515 case HW_PAGESIZE: 516 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 517 case HW_ALIGNBYTES: 518 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 519 default: 520 return (EOPNOTSUPP); 521 } 522 /* NOTREACHED */ 523 } 524 525 #ifdef DEBUG 526 /* 527 * Debugging related system variables. 528 */ 529 struct ctldebug debug0, debug1, debug2, debug3, debug4; 530 struct ctldebug debug5, debug6, debug7, debug8, debug9; 531 struct ctldebug debug10, debug11, debug12, debug13, debug14; 532 struct ctldebug debug15, debug16, debug17, debug18, debug19; 533 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 534 &debug0, &debug1, &debug2, &debug3, &debug4, 535 &debug5, &debug6, &debug7, &debug8, &debug9, 536 &debug10, &debug11, &debug12, &debug13, &debug14, 537 &debug15, &debug16, &debug17, &debug18, &debug19, 538 }; 539 int 540 debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 541 int *name; 542 u_int namelen; 543 void *oldp; 544 size_t *oldlenp; 545 void *newp; 546 size_t newlen; 547 struct proc *p; 548 { 549 struct ctldebug *cdp; 550 551 /* all sysctl names at this level are name and field */ 552 if (namelen != 2) 553 return (ENOTDIR); /* overloaded */ 554 cdp = debugvars[name[0]]; 555 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 556 return (EOPNOTSUPP); 557 switch (name[1]) { 558 case CTL_DEBUG_NAME: 559 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 560 case CTL_DEBUG_VALUE: 561 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 562 default: 563 return (EOPNOTSUPP); 564 } 565 /* NOTREACHED */ 566 } 567 #endif /* DEBUG */ 568 569 int 570 proc_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 571 int *name; 572 u_int namelen; 573 void *oldp; 574 size_t *oldlenp; 575 void *newp; 576 size_t newlen; 577 struct proc *p; 578 { 579 struct proc *ptmp = NULL; 580 const struct proclist_desc *pd; 581 int error = 0; 582 struct rlimit alim; 583 struct plimit *newplim; 584 char *tmps = NULL; 585 int i, curlen, len; 586 587 if (namelen < 2) 588 return EINVAL; 589 590 if (name[0] == PROC_CURPROC) { 591 ptmp = p; 592 } else { 593 proclist_lock_read(); 594 for (pd = proclists; pd->pd_list != NULL; pd++) { 595 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 596 ptmp = LIST_NEXT(ptmp, p_list)) { 597 /* Skip embryonic processes. */ 598 if (ptmp->p_stat == SIDL) 599 continue; 600 if (ptmp->p_pid == (pid_t)name[0]) 601 break; 602 } 603 if (ptmp != NULL) 604 break; 605 } 606 proclist_unlock_read(); 607 if (ptmp == NULL) 608 return(ESRCH); 609 if (p->p_ucred->cr_uid != 0) { 610 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 611 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 612 return EPERM; 613 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 614 return EPERM; /* sgid proc */ 615 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 616 if (p->p_ucred->cr_groups[i] == 617 ptmp->p_cred->p_rgid) 618 break; 619 } 620 if (i == p->p_ucred->cr_ngroups) 621 return EPERM; 622 } 623 } 624 if (name[1] == PROC_PID_CORENAME) { 625 if (namelen != 2) 626 return EINVAL; 627 /* 628 * Can't use sysctl_string() here because we may malloc a new 629 * area during the process, so we have to do it by hand. 630 */ 631 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 632 if (oldlenp && *oldlenp < curlen) { 633 if (!oldp) 634 *oldlenp = curlen; 635 return (ENOMEM); 636 } 637 if (newp) { 638 if (securelevel > 2) 639 return EPERM; 640 if (newlen > MAXPATHLEN) 641 return ENAMETOOLONG; 642 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 643 if (tmps == NULL) 644 return ENOMEM; 645 error = copyin(newp, tmps, newlen + 1); 646 tmps[newlen] = '\0'; 647 if (error) 648 goto cleanup; 649 /* Enforce to be either 'core' for end with '.core' */ 650 if (newlen < 4) { /* c.o.r.e */ 651 error = EINVAL; 652 goto cleanup; 653 } 654 len = newlen - 4; 655 if (len > 0) { 656 if (tmps[len - 1] != '.' && 657 tmps[len - 1] != '/') { 658 error = EINVAL; 659 goto cleanup; 660 } 661 } 662 if (strcmp(&tmps[len], "core") != 0) { 663 error = EINVAL; 664 goto cleanup; 665 } 666 } 667 if (oldp && oldlenp) { 668 *oldlenp = curlen; 669 error = copyout(ptmp->p_limit->pl_corename, oldp, 670 curlen); 671 } 672 if (newp && error == 0) { 673 /* if the 2 strings are identical, don't limcopy() */ 674 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 675 error = 0; 676 goto cleanup; 677 } 678 if (ptmp->p_limit->p_refcnt > 1 && 679 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 680 newplim = limcopy(ptmp->p_limit); 681 limfree(ptmp->p_limit); 682 ptmp->p_limit = newplim; 683 } else if (ptmp->p_limit->pl_corename != defcorename) { 684 free(ptmp->p_limit->pl_corename, M_TEMP); 685 } 686 ptmp->p_limit->pl_corename = tmps; 687 return (0); 688 } 689 cleanup: 690 if (tmps) 691 free(tmps, M_TEMP); 692 return (error); 693 } 694 if (name[1] == PROC_PID_LIMIT) { 695 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 696 return EINVAL; 697 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 698 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 699 error = sysctl_quad(oldp, oldlenp, newp, newlen, 700 &alim.rlim_max); 701 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 702 error = sysctl_quad(oldp, oldlenp, newp, newlen, 703 &alim.rlim_cur); 704 else 705 error = EINVAL; 706 707 if (error) 708 return error; 709 710 if (newp) 711 error = dosetrlimit(ptmp, p->p_cred, 712 name[2] - 1, &alim); 713 return error; 714 } 715 return (EINVAL); 716 } 717 718 /* 719 * Convenience macros. 720 */ 721 722 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 723 if (oldlenp) { \ 724 if (!oldp) \ 725 *oldlenp = len; \ 726 else { \ 727 if (*oldlenp < len) \ 728 return(ENOMEM); \ 729 *oldlenp = len; \ 730 error = copyout((caddr_t)valp, oldp, len); \ 731 } \ 732 } 733 734 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 735 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 736 737 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 738 if (newp && newlen != len) \ 739 return (EINVAL); 740 741 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 742 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 743 744 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 745 if (error == 0 && newp) \ 746 error = copyin(newp, valp, len); 747 748 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 749 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 750 751 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 752 if (oldlenp) { \ 753 len = strlen(str) + 1; \ 754 if (!oldp) \ 755 *oldlenp = len; \ 756 else { \ 757 if (*oldlenp < len) { \ 758 err2 = ENOMEM; \ 759 len = *oldlenp; \ 760 } else \ 761 *oldlenp = len; \ 762 error = copyout(str, oldp, len);\ 763 if (error == 0) \ 764 error = err2; \ 765 } \ 766 } 767 768 /* 769 * Validate parameters and get old / set new parameters 770 * for an integer-valued sysctl function. 771 */ 772 int 773 sysctl_int(oldp, oldlenp, newp, newlen, valp) 774 void *oldp; 775 size_t *oldlenp; 776 void *newp; 777 size_t newlen; 778 int *valp; 779 { 780 int error = 0; 781 782 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 783 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 784 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 785 786 return (error); 787 } 788 789 790 /* 791 * As above, but read-only. 792 */ 793 int 794 sysctl_rdint(oldp, oldlenp, newp, val) 795 void *oldp; 796 size_t *oldlenp; 797 void *newp; 798 int val; 799 { 800 int error = 0; 801 802 if (newp) 803 return (EPERM); 804 805 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 806 807 return (error); 808 } 809 810 /* 811 * Validate parameters and get old / set new parameters 812 * for an quad-valued sysctl function. 813 */ 814 int 815 sysctl_quad(oldp, oldlenp, newp, newlen, valp) 816 void *oldp; 817 size_t *oldlenp; 818 void *newp; 819 size_t newlen; 820 quad_t *valp; 821 { 822 int error = 0; 823 824 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 825 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 826 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 827 828 return (error); 829 } 830 831 /* 832 * As above, but read-only. 833 */ 834 int 835 sysctl_rdquad(oldp, oldlenp, newp, val) 836 void *oldp; 837 size_t *oldlenp; 838 void *newp; 839 quad_t val; 840 { 841 int error = 0; 842 843 if (newp) 844 return (EPERM); 845 846 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 847 848 return (error); 849 } 850 851 /* 852 * Validate parameters and get old / set new parameters 853 * for a string-valued sysctl function. 854 */ 855 int 856 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 857 void *oldp; 858 size_t *oldlenp; 859 void *newp; 860 size_t newlen; 861 char *str; 862 int maxlen; 863 { 864 int len, error = 0, err2 = 0; 865 866 if (newp && newlen >= maxlen) 867 return (EINVAL); 868 869 SYSCTL_STRING_CORE(oldp, oldlenp, str); 870 871 if (error == 0 && newp) { 872 error = copyin(newp, str, newlen); 873 str[newlen] = 0; 874 } 875 return (error); 876 } 877 878 /* 879 * As above, but read-only. 880 */ 881 int 882 sysctl_rdstring(oldp, oldlenp, newp, str) 883 void *oldp; 884 size_t *oldlenp; 885 void *newp; 886 const char *str; 887 { 888 int len, error = 0, err2 = 0; 889 890 if (newp) 891 return (EPERM); 892 893 SYSCTL_STRING_CORE(oldp, oldlenp, str); 894 895 return (error); 896 } 897 898 /* 899 * Validate parameters and get old / set new parameters 900 * for a structure oriented sysctl function. 901 */ 902 int 903 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 904 void *oldp; 905 size_t *oldlenp; 906 void *newp; 907 size_t newlen; 908 void *sp; 909 int len; 910 { 911 int error = 0; 912 913 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 914 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 915 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 916 917 return (error); 918 } 919 920 /* 921 * Validate parameters and get old parameters 922 * for a structure oriented sysctl function. 923 */ 924 int 925 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 926 void *oldp; 927 size_t *oldlenp; 928 void *newp; 929 const void *sp; 930 int len; 931 { 932 int error = 0; 933 934 if (newp) 935 return (EPERM); 936 937 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 938 939 return (error); 940 } 941 942 /* 943 * Get file structures. 944 */ 945 static int 946 sysctl_file(vwhere, sizep) 947 void *vwhere; 948 size_t *sizep; 949 { 950 int buflen, error; 951 struct file *fp; 952 char *start, *where; 953 954 start = where = vwhere; 955 buflen = *sizep; 956 if (where == NULL) { 957 /* 958 * overestimate by 10 files 959 */ 960 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 961 return (0); 962 } 963 964 /* 965 * first copyout filehead 966 */ 967 if (buflen < sizeof(filehead)) { 968 *sizep = 0; 969 return (0); 970 } 971 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 972 if (error) 973 return (error); 974 buflen -= sizeof(filehead); 975 where += sizeof(filehead); 976 977 /* 978 * followed by an array of file structures 979 */ 980 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 981 if (buflen < sizeof(struct file)) { 982 *sizep = where - start; 983 return (ENOMEM); 984 } 985 error = copyout((caddr_t)fp, where, sizeof(struct file)); 986 if (error) 987 return (error); 988 buflen -= sizeof(struct file); 989 where += sizeof(struct file); 990 } 991 *sizep = where - start; 992 return (0); 993 } 994 995 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 996 #define FILL_PERM(src, dst) do { \ 997 (dst)._key = (src)._key; \ 998 (dst).uid = (src).uid; \ 999 (dst).gid = (src).gid; \ 1000 (dst).cuid = (src).cuid; \ 1001 (dst).cgid = (src).cgid; \ 1002 (dst).mode = (src).mode; \ 1003 (dst)._seq = (src)._seq; \ 1004 } while (0); 1005 #define FILL_MSG(src, dst) do { \ 1006 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1007 (dst).msg_qnum = (src).msg_qnum; \ 1008 (dst).msg_qbytes = (src).msg_qbytes; \ 1009 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1010 (dst).msg_lspid = (src).msg_lspid; \ 1011 (dst).msg_lrpid = (src).msg_lrpid; \ 1012 (dst).msg_stime = (src).msg_stime; \ 1013 (dst).msg_rtime = (src).msg_rtime; \ 1014 (dst).msg_ctime = (src).msg_ctime; \ 1015 } while (0) 1016 #define FILL_SEM(src, dst) do { \ 1017 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1018 (dst).sem_nsems = (src).sem_nsems; \ 1019 (dst).sem_otime = (src).sem_otime; \ 1020 (dst).sem_ctime = (src).sem_ctime; \ 1021 } while (0) 1022 #define FILL_SHM(src, dst) do { \ 1023 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1024 (dst).shm_segsz = (src).shm_segsz; \ 1025 (dst).shm_lpid = (src).shm_lpid; \ 1026 (dst).shm_cpid = (src).shm_cpid; \ 1027 (dst).shm_atime = (src).shm_atime; \ 1028 (dst).shm_dtime = (src).shm_dtime; \ 1029 (dst).shm_ctime = (src).shm_ctime; \ 1030 (dst).shm_nattch = (src).shm_nattch; \ 1031 } while (0) 1032 1033 static int 1034 sysctl_sysvipc(name, namelen, where, sizep) 1035 int *name; 1036 u_int namelen; 1037 void *where; 1038 size_t *sizep; 1039 { 1040 #ifdef SYSVMSG 1041 struct msg_sysctl_info *msgsi; 1042 #endif 1043 #ifdef SYSVSEM 1044 struct sem_sysctl_info *semsi; 1045 #endif 1046 #ifdef SYSVSHM 1047 struct shm_sysctl_info *shmsi; 1048 #endif 1049 size_t infosize, dssize, tsize, buflen; 1050 void *buf = NULL, *buf2; 1051 char *start; 1052 int32_t nds; 1053 int i, error, ret; 1054 1055 if (namelen != 1) 1056 return (EINVAL); 1057 1058 start = where; 1059 buflen = *sizep; 1060 1061 switch (*name) { 1062 case KERN_SYSVIPC_MSG_INFO: 1063 #ifdef SYSVMSG 1064 infosize = sizeof(msgsi->msginfo); 1065 nds = msginfo.msgmni; 1066 dssize = sizeof(msgsi->msgids[0]); 1067 break; 1068 #else 1069 return (EINVAL); 1070 #endif 1071 case KERN_SYSVIPC_SEM_INFO: 1072 #ifdef SYSVSEM 1073 infosize = sizeof(semsi->seminfo); 1074 nds = seminfo.semmni; 1075 dssize = sizeof(semsi->semids[0]); 1076 break; 1077 #else 1078 return (EINVAL); 1079 #endif 1080 case KERN_SYSVIPC_SHM_INFO: 1081 #ifdef SYSVSHM 1082 infosize = sizeof(shmsi->shminfo); 1083 nds = shminfo.shmmni; 1084 dssize = sizeof(shmsi->shmids[0]); 1085 break; 1086 #else 1087 return (EINVAL); 1088 #endif 1089 default: 1090 return (EINVAL); 1091 } 1092 /* 1093 * Round infosize to 64 bit boundary if requesting more than just 1094 * the info structure or getting the total data size. 1095 */ 1096 if (where == NULL || *sizep > infosize) 1097 infosize = ((infosize + 7) / 8) * 8; 1098 tsize = infosize + nds * dssize; 1099 1100 /* Return just the total size required. */ 1101 if (where == NULL) { 1102 *sizep = tsize; 1103 return (0); 1104 } 1105 1106 /* Not enough room for even the info struct. */ 1107 if (buflen < infosize) { 1108 *sizep = 0; 1109 return (ENOMEM); 1110 } 1111 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1112 memset(buf, 0, min(tsize, buflen)); 1113 1114 switch (*name) { 1115 #ifdef SYSVMSG 1116 case KERN_SYSVIPC_MSG_INFO: 1117 msgsi = (struct msg_sysctl_info *)buf; 1118 buf2 = &msgsi->msgids[0]; 1119 msgsi->msginfo = msginfo; 1120 break; 1121 #endif 1122 #ifdef SYSVSEM 1123 case KERN_SYSVIPC_SEM_INFO: 1124 semsi = (struct sem_sysctl_info *)buf; 1125 buf2 = &semsi->semids[0]; 1126 semsi->seminfo = seminfo; 1127 break; 1128 #endif 1129 #ifdef SYSVSHM 1130 case KERN_SYSVIPC_SHM_INFO: 1131 shmsi = (struct shm_sysctl_info *)buf; 1132 buf2 = &shmsi->shmids[0]; 1133 shmsi->shminfo = shminfo; 1134 break; 1135 #endif 1136 } 1137 buflen -= infosize; 1138 1139 ret = 0; 1140 if (buflen > 0) { 1141 /* Fill in the IPC data structures. */ 1142 for (i = 0; i < nds; i++) { 1143 if (buflen < dssize) { 1144 ret = ENOMEM; 1145 break; 1146 } 1147 switch (*name) { 1148 #ifdef SYSVMSG 1149 case KERN_SYSVIPC_MSG_INFO: 1150 FILL_MSG(msqids[i], msgsi->msgids[i]); 1151 break; 1152 #endif 1153 #ifdef SYSVSEM 1154 case KERN_SYSVIPC_SEM_INFO: 1155 FILL_SEM(sema[i], semsi->semids[i]); 1156 break; 1157 #endif 1158 #ifdef SYSVSHM 1159 case KERN_SYSVIPC_SHM_INFO: 1160 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1161 break; 1162 #endif 1163 } 1164 buflen -= dssize; 1165 } 1166 } 1167 *sizep -= buflen; 1168 error = copyout(buf, start, *sizep); 1169 /* If copyout succeeded, use return code set earlier. */ 1170 if (error == 0) 1171 error = ret; 1172 if (buf) 1173 free(buf, M_TEMP); 1174 return (error); 1175 } 1176 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1177 1178 static int 1179 sysctl_msgbuf(vwhere, sizep) 1180 void *vwhere; 1181 size_t *sizep; 1182 { 1183 char *where = vwhere; 1184 size_t len, maxlen = *sizep; 1185 long pos; 1186 int error; 1187 1188 /* 1189 * deal with cases where the message buffer has 1190 * become corrupted. 1191 */ 1192 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1193 msgbufenabled = 0; 1194 return (ENXIO); 1195 } 1196 1197 if (where == NULL) { 1198 /* always return full buffer size */ 1199 *sizep = msgbufp->msg_bufs; 1200 return (0); 1201 } 1202 1203 error = 0; 1204 maxlen = min(msgbufp->msg_bufs, maxlen); 1205 pos = msgbufp->msg_bufx; 1206 while (maxlen > 0) { 1207 len = pos == 0 ? msgbufp->msg_bufx : msgbufp->msg_bufs - msgbufp->msg_bufx; 1208 len = min(len, maxlen); 1209 if (len == 0) 1210 break; 1211 error = copyout(&msgbufp->msg_bufc[pos], where, len); 1212 if (error) 1213 break; 1214 where += len; 1215 maxlen -= len; 1216 pos = 0; 1217 } 1218 return (error); 1219 } 1220 1221 /* 1222 * try over estimating by 5 procs 1223 */ 1224 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1225 1226 static int 1227 sysctl_doeproc(name, namelen, vwhere, sizep) 1228 int *name; 1229 u_int namelen; 1230 void *vwhere; 1231 size_t *sizep; 1232 { 1233 struct eproc eproc; 1234 struct kinfo_proc2 kproc2; 1235 struct kinfo_proc *dp; 1236 struct proc *p; 1237 const struct proclist_desc *pd; 1238 char *where, *dp2; 1239 int type, op, arg, elem_size, elem_count; 1240 int buflen, needed, error; 1241 1242 dp = vwhere; 1243 dp2 = where = vwhere; 1244 buflen = where != NULL ? *sizep : 0; 1245 error = needed = 0; 1246 type = name[0]; 1247 1248 if (type == KERN_PROC) { 1249 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1250 return (EINVAL); 1251 op = name[1]; 1252 if (op != KERN_PROC_ALL) 1253 arg = name[2]; 1254 } else { 1255 if (namelen != 5) 1256 return (EINVAL); 1257 op = name[1]; 1258 arg = name[2]; 1259 elem_size = name[3]; 1260 elem_count = name[4]; 1261 } 1262 1263 proclist_lock_read(); 1264 1265 pd = proclists; 1266 again: 1267 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1268 /* 1269 * Skip embryonic processes. 1270 */ 1271 if (p->p_stat == SIDL) 1272 continue; 1273 /* 1274 * TODO - make more efficient (see notes below). 1275 * do by session. 1276 */ 1277 switch (op) { 1278 1279 case KERN_PROC_PID: 1280 /* could do this with just a lookup */ 1281 if (p->p_pid != (pid_t)arg) 1282 continue; 1283 break; 1284 1285 case KERN_PROC_PGRP: 1286 /* could do this by traversing pgrp */ 1287 if (p->p_pgrp->pg_id != (pid_t)arg) 1288 continue; 1289 break; 1290 1291 case KERN_PROC_SESSION: 1292 if (p->p_session->s_sid != (pid_t)arg) 1293 continue; 1294 break; 1295 1296 case KERN_PROC_TTY: 1297 if (arg == KERN_PROC_TTY_REVOKE) { 1298 if ((p->p_flag & P_CONTROLT) == 0 || 1299 p->p_session->s_ttyp == NULL || 1300 p->p_session->s_ttyvp != NULL) 1301 continue; 1302 } else if ((p->p_flag & P_CONTROLT) == 0 || 1303 p->p_session->s_ttyp == NULL) { 1304 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1305 continue; 1306 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1307 continue; 1308 break; 1309 1310 case KERN_PROC_UID: 1311 if (p->p_ucred->cr_uid != (uid_t)arg) 1312 continue; 1313 break; 1314 1315 case KERN_PROC_RUID: 1316 if (p->p_cred->p_ruid != (uid_t)arg) 1317 continue; 1318 break; 1319 1320 case KERN_PROC_GID: 1321 if (p->p_ucred->cr_gid != (uid_t)arg) 1322 continue; 1323 break; 1324 1325 case KERN_PROC_RGID: 1326 if (p->p_cred->p_rgid != (uid_t)arg) 1327 continue; 1328 break; 1329 1330 case KERN_PROC_ALL: 1331 /* allow everything */ 1332 break; 1333 1334 default: 1335 error = EINVAL; 1336 goto cleanup; 1337 } 1338 if (type == KERN_PROC) { 1339 if (buflen >= sizeof(struct kinfo_proc)) { 1340 fill_eproc(p, &eproc); 1341 error = copyout((caddr_t)p, &dp->kp_proc, 1342 sizeof(struct proc)); 1343 if (error) 1344 goto cleanup; 1345 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1346 sizeof(eproc)); 1347 if (error) 1348 goto cleanup; 1349 dp++; 1350 buflen -= sizeof(struct kinfo_proc); 1351 } 1352 needed += sizeof(struct kinfo_proc); 1353 } else { /* KERN_PROC2 */ 1354 if (buflen >= elem_size && elem_count > 0) { 1355 fill_kproc2(p, &kproc2); 1356 /* 1357 * Copy out elem_size, but not larger than 1358 * the size of a struct kinfo_proc2. 1359 */ 1360 error = copyout(&kproc2, dp2, 1361 min(sizeof(kproc2), elem_size)); 1362 if (error) 1363 goto cleanup; 1364 dp2 += elem_size; 1365 buflen -= elem_size; 1366 elem_count--; 1367 } 1368 needed += elem_size; 1369 } 1370 } 1371 pd++; 1372 if (pd->pd_list != NULL) 1373 goto again; 1374 proclist_unlock_read(); 1375 1376 if (where != NULL) { 1377 if (type == KERN_PROC) 1378 *sizep = (caddr_t)dp - where; 1379 else 1380 *sizep = dp2 - where; 1381 if (needed > *sizep) 1382 return (ENOMEM); 1383 } else { 1384 needed += KERN_PROCSLOP; 1385 *sizep = needed; 1386 } 1387 return (0); 1388 cleanup: 1389 proclist_unlock_read(); 1390 return (error); 1391 } 1392 1393 /* 1394 * Fill in an eproc structure for the specified process. 1395 */ 1396 void 1397 fill_eproc(p, ep) 1398 struct proc *p; 1399 struct eproc *ep; 1400 { 1401 struct tty *tp; 1402 1403 ep->e_paddr = p; 1404 ep->e_sess = p->p_session; 1405 ep->e_pcred = *p->p_cred; 1406 ep->e_ucred = *p->p_ucred; 1407 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1408 ep->e_vm.vm_rssize = 0; 1409 ep->e_vm.vm_tsize = 0; 1410 ep->e_vm.vm_dsize = 0; 1411 ep->e_vm.vm_ssize = 0; 1412 /* ep->e_vm.vm_pmap = XXX; */ 1413 } else { 1414 struct vmspace *vm = p->p_vmspace; 1415 1416 ep->e_vm.vm_rssize = vm_resident_count(vm); 1417 ep->e_vm.vm_tsize = vm->vm_tsize; 1418 ep->e_vm.vm_dsize = vm->vm_dsize; 1419 ep->e_vm.vm_ssize = vm->vm_ssize; 1420 } 1421 if (p->p_pptr) 1422 ep->e_ppid = p->p_pptr->p_pid; 1423 else 1424 ep->e_ppid = 0; 1425 ep->e_pgid = p->p_pgrp->pg_id; 1426 ep->e_sid = ep->e_sess->s_sid; 1427 ep->e_jobc = p->p_pgrp->pg_jobc; 1428 if ((p->p_flag & P_CONTROLT) && 1429 (tp = ep->e_sess->s_ttyp)) { 1430 ep->e_tdev = tp->t_dev; 1431 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1432 ep->e_tsess = tp->t_session; 1433 } else 1434 ep->e_tdev = NODEV; 1435 if (p->p_wmesg) 1436 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1437 ep->e_xsize = ep->e_xrssize = 0; 1438 ep->e_xccount = ep->e_xswrss = 0; 1439 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1440 if (SESS_LEADER(p)) 1441 ep->e_flag |= EPROC_SLEADER; 1442 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1443 } 1444 1445 /* 1446 * Fill in an eproc structure for the specified process. 1447 */ 1448 static void 1449 fill_kproc2(p, ki) 1450 struct proc *p; 1451 struct kinfo_proc2 *ki; 1452 { 1453 struct tty *tp; 1454 1455 memset(ki, 0, sizeof(*ki)); 1456 1457 ki->p_forw = PTRTOINT64(p->p_forw); 1458 ki->p_back = PTRTOINT64(p->p_back); 1459 ki->p_paddr = PTRTOINT64(p); 1460 1461 ki->p_addr = PTRTOINT64(p->p_addr); 1462 ki->p_fd = PTRTOINT64(p->p_fd); 1463 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1464 ki->p_stats = PTRTOINT64(p->p_stats); 1465 ki->p_limit = PTRTOINT64(p->p_limit); 1466 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1467 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1468 ki->p_sess = PTRTOINT64(p->p_session); 1469 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1470 ki->p_ru = PTRTOINT64(p->p_ru); 1471 1472 ki->p_eflag = 0; 1473 ki->p_exitsig = p->p_exitsig; 1474 ki->p_flag = p->p_flag; 1475 1476 ki->p_pid = p->p_pid; 1477 if (p->p_pptr) 1478 ki->p_ppid = p->p_pptr->p_pid; 1479 else 1480 ki->p_ppid = 0; 1481 ki->p_sid = p->p_session->s_sid; 1482 ki->p__pgid = p->p_pgrp->pg_id; 1483 1484 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1485 1486 ki->p_uid = p->p_ucred->cr_uid; 1487 ki->p_ruid = p->p_cred->p_ruid; 1488 ki->p_gid = p->p_ucred->cr_gid; 1489 ki->p_rgid = p->p_cred->p_rgid; 1490 1491 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1492 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1493 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1494 1495 ki->p_jobc = p->p_pgrp->pg_jobc; 1496 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1497 ki->p_tdev = tp->t_dev; 1498 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1499 ki->p_tsess = PTRTOINT64(tp->t_session); 1500 } else { 1501 ki->p_tdev = NODEV; 1502 } 1503 1504 ki->p_estcpu = p->p_estcpu; 1505 ki->p_rtime_sec = p->p_rtime.tv_sec; 1506 ki->p_rtime_usec = p->p_rtime.tv_usec; 1507 ki->p_cpticks = p->p_cpticks; 1508 ki->p_pctcpu = p->p_pctcpu; 1509 ki->p_swtime = p->p_swtime; 1510 ki->p_slptime = p->p_slptime; 1511 if (p->p_stat == SONPROC) { 1512 KDASSERT(p->p_cpu != NULL); 1513 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1514 } else 1515 ki->p_schedflags = 0; 1516 1517 ki->p_uticks = p->p_uticks; 1518 ki->p_sticks = p->p_sticks; 1519 ki->p_iticks = p->p_iticks; 1520 1521 ki->p_tracep = PTRTOINT64(p->p_tracep); 1522 ki->p_traceflag = p->p_traceflag; 1523 1524 ki->p_holdcnt = p->p_holdcnt; 1525 1526 memcpy(&ki->p_siglist, &p->p_siglist, sizeof(ki_sigset_t)); 1527 memcpy(&ki->p_sigmask, &p->p_sigmask, sizeof(ki_sigset_t)); 1528 memcpy(&ki->p_sigignore, &p->p_sigignore, sizeof(ki_sigset_t)); 1529 memcpy(&ki->p_sigcatch, &p->p_sigcatch, sizeof(ki_sigset_t)); 1530 1531 ki->p_stat = p->p_stat; 1532 ki->p_priority = p->p_priority; 1533 ki->p_usrpri = p->p_usrpri; 1534 ki->p_nice = p->p_nice; 1535 1536 ki->p_xstat = p->p_xstat; 1537 ki->p_acflag = p->p_acflag; 1538 1539 strncpy(ki->p_comm, p->p_comm, 1540 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1541 1542 if (p->p_wmesg) 1543 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1544 ki->p_wchan = PTRTOINT64(p->p_wchan); 1545 1546 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1547 1548 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1549 ki->p_vm_rssize = 0; 1550 ki->p_vm_tsize = 0; 1551 ki->p_vm_dsize = 0; 1552 ki->p_vm_ssize = 0; 1553 } else { 1554 struct vmspace *vm = p->p_vmspace; 1555 1556 ki->p_vm_rssize = vm_resident_count(vm); 1557 ki->p_vm_tsize = vm->vm_tsize; 1558 ki->p_vm_dsize = vm->vm_dsize; 1559 ki->p_vm_ssize = vm->vm_ssize; 1560 } 1561 1562 if (p->p_session->s_ttyvp) 1563 ki->p_eflag |= EPROC_CTTY; 1564 if (SESS_LEADER(p)) 1565 ki->p_eflag |= EPROC_SLEADER; 1566 1567 /* XXX Is this double check necessary? */ 1568 if (P_ZOMBIE(p) || p->p_addr == NULL) { 1569 ki->p_uvalid = 0; 1570 } else { 1571 ki->p_uvalid = 1; 1572 1573 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1574 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1575 1576 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1577 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1578 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1579 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1580 1581 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1582 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1583 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1584 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1585 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1586 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1587 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1588 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1589 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1590 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1591 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1592 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1593 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1594 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1595 1596 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1597 p->p_stats->p_cru.ru_stime.tv_sec; 1598 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1599 p->p_stats->p_cru.ru_stime.tv_usec; 1600 } 1601 } 1602 1603 int 1604 sysctl_procargs(name, namelen, where, sizep, up) 1605 int *name; 1606 u_int namelen; 1607 void *where; 1608 size_t *sizep; 1609 struct proc *up; 1610 { 1611 struct ps_strings pss; 1612 struct proc *p; 1613 size_t len, upper_bound, xlen; 1614 struct uio auio; 1615 struct iovec aiov; 1616 vaddr_t argv; 1617 pid_t pid; 1618 int nargv, type, error, i; 1619 char *arg; 1620 char *tmp; 1621 1622 if (namelen != 2) 1623 return (EINVAL); 1624 pid = name[0]; 1625 type = name[1]; 1626 1627 switch (type) { 1628 case KERN_PROC_ARGV: 1629 case KERN_PROC_NARGV: 1630 case KERN_PROC_ENV: 1631 case KERN_PROC_NENV: 1632 /* ok */ 1633 break; 1634 default: 1635 return (EINVAL); 1636 } 1637 1638 /* check pid */ 1639 if ((p = pfind(pid)) == NULL) 1640 return (EINVAL); 1641 1642 /* only root or same user change look at the environment */ 1643 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1644 if (up->p_ucred->cr_uid != 0) { 1645 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1646 up->p_cred->p_ruid != p->p_cred->p_svuid) 1647 return (EPERM); 1648 } 1649 } 1650 1651 if (sizep != NULL && where == NULL) { 1652 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1653 *sizep = sizeof (int); 1654 else 1655 *sizep = ARG_MAX; /* XXX XXX XXX */ 1656 return (0); 1657 } 1658 if (where == NULL || sizep == NULL) 1659 return (EINVAL); 1660 1661 /* 1662 * Zombies don't have a stack, so we can't read their psstrings. 1663 * System processes also don't have a user stack. 1664 */ 1665 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1666 return (EINVAL); 1667 1668 /* 1669 * Lock the process down in memory. 1670 */ 1671 /* XXXCDC: how should locking work here? */ 1672 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1673 return (EFAULT); 1674 PHOLD(p); 1675 p->p_vmspace->vm_refcnt++; /* XXX */ 1676 1677 /* 1678 * Allocate a temporary buffer to hold the arguments. 1679 */ 1680 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1681 1682 /* 1683 * Read in the ps_strings structure. 1684 */ 1685 aiov.iov_base = &pss; 1686 aiov.iov_len = sizeof(pss); 1687 auio.uio_iov = &aiov; 1688 auio.uio_iovcnt = 1; 1689 auio.uio_offset = (vaddr_t)p->p_psstr; 1690 auio.uio_resid = sizeof(pss); 1691 auio.uio_segflg = UIO_SYSSPACE; 1692 auio.uio_rw = UIO_READ; 1693 auio.uio_procp = NULL; 1694 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1695 if (error) 1696 goto done; 1697 1698 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1699 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1700 else 1701 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1702 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1703 error = copyout(&nargv, where, sizeof(nargv)); 1704 *sizep = sizeof(nargv); 1705 goto done; 1706 } 1707 /* 1708 * Now read the address of the argument vector. 1709 */ 1710 switch (type) { 1711 case KERN_PROC_ARGV: 1712 /* XXX compat32 stuff here */ 1713 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1714 break; 1715 case KERN_PROC_ENV: 1716 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1717 break; 1718 default: 1719 return (EINVAL); 1720 } 1721 auio.uio_offset = (off_t)(long)tmp; 1722 aiov.iov_base = &argv; 1723 aiov.iov_len = sizeof(argv); 1724 auio.uio_iov = &aiov; 1725 auio.uio_iovcnt = 1; 1726 auio.uio_resid = sizeof(argv); 1727 auio.uio_segflg = UIO_SYSSPACE; 1728 auio.uio_rw = UIO_READ; 1729 auio.uio_procp = NULL; 1730 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1731 if (error) 1732 goto done; 1733 1734 /* 1735 * Now copy in the actual argument vector, one page at a time, 1736 * since we don't know how long the vector is (though, we do 1737 * know how many NUL-terminated strings are in the vector). 1738 */ 1739 len = 0; 1740 upper_bound = *sizep; 1741 for (; nargv != 0 && len < upper_bound; len += xlen) { 1742 aiov.iov_base = arg; 1743 aiov.iov_len = PAGE_SIZE; 1744 auio.uio_iov = &aiov; 1745 auio.uio_iovcnt = 1; 1746 auio.uio_offset = argv + len; 1747 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1748 auio.uio_resid = xlen; 1749 auio.uio_segflg = UIO_SYSSPACE; 1750 auio.uio_rw = UIO_READ; 1751 auio.uio_procp = NULL; 1752 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1753 if (error) 1754 goto done; 1755 1756 for (i = 0; i < xlen && nargv != 0; i++) { 1757 if (arg[i] == '\0') 1758 nargv--; /* one full string */ 1759 } 1760 1761 /* make sure we don't copyout past the end of the user's buffer */ 1762 if (len + i > upper_bound) 1763 i = upper_bound - len; 1764 1765 error = copyout(arg, (char *)where + len, i); 1766 if (error) 1767 break; 1768 1769 if (nargv == 0) { 1770 len += i; 1771 break; 1772 } 1773 } 1774 *sizep = len; 1775 1776 done: 1777 PRELE(p); 1778 uvmspace_free(p->p_vmspace); 1779 1780 free(arg, M_TEMP); 1781 return (error); 1782 } 1783
Indexes created Sun Sep 21 16:09:51 GMT 2025