kern_sysctl.c revision 1.73.2.4
1 /* $NetBSD: kern_sysctl.c,v 1.73.2.4 2002/01/05 18:01:58 he 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 } 684 if (ptmp->p_limit->pl_corename != defcorename) { 685 free(ptmp->p_limit->pl_corename, M_TEMP); 686 } 687 ptmp->p_limit->pl_corename = tmps; 688 return (0); 689 } 690 cleanup: 691 if (tmps) 692 free(tmps, M_TEMP); 693 return (error); 694 } 695 if (name[1] == PROC_PID_LIMIT) { 696 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 697 return EINVAL; 698 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 699 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 700 error = sysctl_quad(oldp, oldlenp, newp, newlen, 701 &alim.rlim_max); 702 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 703 error = sysctl_quad(oldp, oldlenp, newp, newlen, 704 &alim.rlim_cur); 705 else 706 error = EINVAL; 707 708 if (error) 709 return error; 710 711 if (newp) 712 error = dosetrlimit(ptmp, p->p_cred, 713 name[2] - 1, &alim); 714 return error; 715 } 716 return (EINVAL); 717 } 718 719 /* 720 * Convenience macros. 721 */ 722 723 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 724 if (oldlenp) { \ 725 if (!oldp) \ 726 *oldlenp = len; \ 727 else { \ 728 if (*oldlenp < len) \ 729 return(ENOMEM); \ 730 *oldlenp = len; \ 731 error = copyout((caddr_t)valp, oldp, len); \ 732 } \ 733 } 734 735 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 736 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 737 738 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 739 if (newp && newlen != len) \ 740 return (EINVAL); 741 742 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 743 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 744 745 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 746 if (error == 0 && newp) \ 747 error = copyin(newp, valp, len); 748 749 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 750 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 751 752 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 753 if (oldlenp) { \ 754 len = strlen(str) + 1; \ 755 if (!oldp) \ 756 *oldlenp = len; \ 757 else { \ 758 if (*oldlenp < len) { \ 759 err2 = ENOMEM; \ 760 len = *oldlenp; \ 761 } else \ 762 *oldlenp = len; \ 763 error = copyout(str, oldp, len);\ 764 if (error == 0) \ 765 error = err2; \ 766 } \ 767 } 768 769 /* 770 * Validate parameters and get old / set new parameters 771 * for an integer-valued sysctl function. 772 */ 773 int 774 sysctl_int(oldp, oldlenp, newp, newlen, valp) 775 void *oldp; 776 size_t *oldlenp; 777 void *newp; 778 size_t newlen; 779 int *valp; 780 { 781 int error = 0; 782 783 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 784 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 785 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 786 787 return (error); 788 } 789 790 791 /* 792 * As above, but read-only. 793 */ 794 int 795 sysctl_rdint(oldp, oldlenp, newp, val) 796 void *oldp; 797 size_t *oldlenp; 798 void *newp; 799 int val; 800 { 801 int error = 0; 802 803 if (newp) 804 return (EPERM); 805 806 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 807 808 return (error); 809 } 810 811 /* 812 * Validate parameters and get old / set new parameters 813 * for an quad-valued sysctl function. 814 */ 815 int 816 sysctl_quad(oldp, oldlenp, newp, newlen, valp) 817 void *oldp; 818 size_t *oldlenp; 819 void *newp; 820 size_t newlen; 821 quad_t *valp; 822 { 823 int error = 0; 824 825 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 826 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 827 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 828 829 return (error); 830 } 831 832 /* 833 * As above, but read-only. 834 */ 835 int 836 sysctl_rdquad(oldp, oldlenp, newp, val) 837 void *oldp; 838 size_t *oldlenp; 839 void *newp; 840 quad_t val; 841 { 842 int error = 0; 843 844 if (newp) 845 return (EPERM); 846 847 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 848 849 return (error); 850 } 851 852 /* 853 * Validate parameters and get old / set new parameters 854 * for a string-valued sysctl function. 855 */ 856 int 857 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 858 void *oldp; 859 size_t *oldlenp; 860 void *newp; 861 size_t newlen; 862 char *str; 863 int maxlen; 864 { 865 int len, error = 0, err2 = 0; 866 867 if (newp && newlen >= maxlen) 868 return (EINVAL); 869 870 SYSCTL_STRING_CORE(oldp, oldlenp, str); 871 872 if (error == 0 && newp) { 873 error = copyin(newp, str, newlen); 874 str[newlen] = 0; 875 } 876 return (error); 877 } 878 879 /* 880 * As above, but read-only. 881 */ 882 int 883 sysctl_rdstring(oldp, oldlenp, newp, str) 884 void *oldp; 885 size_t *oldlenp; 886 void *newp; 887 const char *str; 888 { 889 int len, error = 0, err2 = 0; 890 891 if (newp) 892 return (EPERM); 893 894 SYSCTL_STRING_CORE(oldp, oldlenp, str); 895 896 return (error); 897 } 898 899 /* 900 * Validate parameters and get old / set new parameters 901 * for a structure oriented sysctl function. 902 */ 903 int 904 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 905 void *oldp; 906 size_t *oldlenp; 907 void *newp; 908 size_t newlen; 909 void *sp; 910 int len; 911 { 912 int error = 0; 913 914 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 915 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 916 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 917 918 return (error); 919 } 920 921 /* 922 * Validate parameters and get old parameters 923 * for a structure oriented sysctl function. 924 */ 925 int 926 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 927 void *oldp; 928 size_t *oldlenp; 929 void *newp; 930 const void *sp; 931 int len; 932 { 933 int error = 0; 934 935 if (newp) 936 return (EPERM); 937 938 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 939 940 return (error); 941 } 942 943 /* 944 * Get file structures. 945 */ 946 static int 947 sysctl_file(vwhere, sizep) 948 void *vwhere; 949 size_t *sizep; 950 { 951 int buflen, error; 952 struct file *fp; 953 char *start, *where; 954 955 start = where = vwhere; 956 buflen = *sizep; 957 if (where == NULL) { 958 /* 959 * overestimate by 10 files 960 */ 961 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 962 return (0); 963 } 964 965 /* 966 * first copyout filehead 967 */ 968 if (buflen < sizeof(filehead)) { 969 *sizep = 0; 970 return (0); 971 } 972 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 973 if (error) 974 return (error); 975 buflen -= sizeof(filehead); 976 where += sizeof(filehead); 977 978 /* 979 * followed by an array of file structures 980 */ 981 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 982 if (buflen < sizeof(struct file)) { 983 *sizep = where - start; 984 return (ENOMEM); 985 } 986 error = copyout((caddr_t)fp, where, sizeof(struct file)); 987 if (error) 988 return (error); 989 buflen -= sizeof(struct file); 990 where += sizeof(struct file); 991 } 992 *sizep = where - start; 993 return (0); 994 } 995 996 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 997 #define FILL_PERM(src, dst) do { \ 998 (dst)._key = (src)._key; \ 999 (dst).uid = (src).uid; \ 1000 (dst).gid = (src).gid; \ 1001 (dst).cuid = (src).cuid; \ 1002 (dst).cgid = (src).cgid; \ 1003 (dst).mode = (src).mode; \ 1004 (dst)._seq = (src)._seq; \ 1005 } while (0); 1006 #define FILL_MSG(src, dst) do { \ 1007 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1008 (dst).msg_qnum = (src).msg_qnum; \ 1009 (dst).msg_qbytes = (src).msg_qbytes; \ 1010 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1011 (dst).msg_lspid = (src).msg_lspid; \ 1012 (dst).msg_lrpid = (src).msg_lrpid; \ 1013 (dst).msg_stime = (src).msg_stime; \ 1014 (dst).msg_rtime = (src).msg_rtime; \ 1015 (dst).msg_ctime = (src).msg_ctime; \ 1016 } while (0) 1017 #define FILL_SEM(src, dst) do { \ 1018 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1019 (dst).sem_nsems = (src).sem_nsems; \ 1020 (dst).sem_otime = (src).sem_otime; \ 1021 (dst).sem_ctime = (src).sem_ctime; \ 1022 } while (0) 1023 #define FILL_SHM(src, dst) do { \ 1024 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1025 (dst).shm_segsz = (src).shm_segsz; \ 1026 (dst).shm_lpid = (src).shm_lpid; \ 1027 (dst).shm_cpid = (src).shm_cpid; \ 1028 (dst).shm_atime = (src).shm_atime; \ 1029 (dst).shm_dtime = (src).shm_dtime; \ 1030 (dst).shm_ctime = (src).shm_ctime; \ 1031 (dst).shm_nattch = (src).shm_nattch; \ 1032 } while (0) 1033 1034 static int 1035 sysctl_sysvipc(name, namelen, where, sizep) 1036 int *name; 1037 u_int namelen; 1038 void *where; 1039 size_t *sizep; 1040 { 1041 #ifdef SYSVMSG 1042 struct msg_sysctl_info *msgsi; 1043 #endif 1044 #ifdef SYSVSEM 1045 struct sem_sysctl_info *semsi; 1046 #endif 1047 #ifdef SYSVSHM 1048 struct shm_sysctl_info *shmsi; 1049 #endif 1050 size_t infosize, dssize, tsize, buflen; 1051 void *buf = NULL, *buf2; 1052 char *start; 1053 int32_t nds; 1054 int i, error, ret; 1055 1056 if (namelen != 1) 1057 return (EINVAL); 1058 1059 start = where; 1060 buflen = *sizep; 1061 1062 switch (*name) { 1063 case KERN_SYSVIPC_MSG_INFO: 1064 #ifdef SYSVMSG 1065 infosize = sizeof(msgsi->msginfo); 1066 nds = msginfo.msgmni; 1067 dssize = sizeof(msgsi->msgids[0]); 1068 break; 1069 #else 1070 return (EINVAL); 1071 #endif 1072 case KERN_SYSVIPC_SEM_INFO: 1073 #ifdef SYSVSEM 1074 infosize = sizeof(semsi->seminfo); 1075 nds = seminfo.semmni; 1076 dssize = sizeof(semsi->semids[0]); 1077 break; 1078 #else 1079 return (EINVAL); 1080 #endif 1081 case KERN_SYSVIPC_SHM_INFO: 1082 #ifdef SYSVSHM 1083 infosize = sizeof(shmsi->shminfo); 1084 nds = shminfo.shmmni; 1085 dssize = sizeof(shmsi->shmids[0]); 1086 break; 1087 #else 1088 return (EINVAL); 1089 #endif 1090 default: 1091 return (EINVAL); 1092 } 1093 /* 1094 * Round infosize to 64 bit boundary if requesting more than just 1095 * the info structure or getting the total data size. 1096 */ 1097 if (where == NULL || *sizep > infosize) 1098 infosize = ((infosize + 7) / 8) * 8; 1099 tsize = infosize + nds * dssize; 1100 1101 /* Return just the total size required. */ 1102 if (where == NULL) { 1103 *sizep = tsize; 1104 return (0); 1105 } 1106 1107 /* Not enough room for even the info struct. */ 1108 if (buflen < infosize) { 1109 *sizep = 0; 1110 return (ENOMEM); 1111 } 1112 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1113 memset(buf, 0, min(tsize, buflen)); 1114 1115 switch (*name) { 1116 #ifdef SYSVMSG 1117 case KERN_SYSVIPC_MSG_INFO: 1118 msgsi = (struct msg_sysctl_info *)buf; 1119 buf2 = &msgsi->msgids[0]; 1120 msgsi->msginfo = msginfo; 1121 break; 1122 #endif 1123 #ifdef SYSVSEM 1124 case KERN_SYSVIPC_SEM_INFO: 1125 semsi = (struct sem_sysctl_info *)buf; 1126 buf2 = &semsi->semids[0]; 1127 semsi->seminfo = seminfo; 1128 break; 1129 #endif 1130 #ifdef SYSVSHM 1131 case KERN_SYSVIPC_SHM_INFO: 1132 shmsi = (struct shm_sysctl_info *)buf; 1133 buf2 = &shmsi->shmids[0]; 1134 shmsi->shminfo = shminfo; 1135 break; 1136 #endif 1137 } 1138 buflen -= infosize; 1139 1140 ret = 0; 1141 if (buflen > 0) { 1142 /* Fill in the IPC data structures. */ 1143 for (i = 0; i < nds; i++) { 1144 if (buflen < dssize) { 1145 ret = ENOMEM; 1146 break; 1147 } 1148 switch (*name) { 1149 #ifdef SYSVMSG 1150 case KERN_SYSVIPC_MSG_INFO: 1151 FILL_MSG(msqids[i], msgsi->msgids[i]); 1152 break; 1153 #endif 1154 #ifdef SYSVSEM 1155 case KERN_SYSVIPC_SEM_INFO: 1156 FILL_SEM(sema[i], semsi->semids[i]); 1157 break; 1158 #endif 1159 #ifdef SYSVSHM 1160 case KERN_SYSVIPC_SHM_INFO: 1161 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1162 break; 1163 #endif 1164 } 1165 buflen -= dssize; 1166 } 1167 } 1168 *sizep -= buflen; 1169 error = copyout(buf, start, *sizep); 1170 /* If copyout succeeded, use return code set earlier. */ 1171 if (error == 0) 1172 error = ret; 1173 if (buf) 1174 free(buf, M_TEMP); 1175 return (error); 1176 } 1177 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1178 1179 static int 1180 sysctl_msgbuf(vwhere, sizep) 1181 void *vwhere; 1182 size_t *sizep; 1183 { 1184 char *where = vwhere; 1185 size_t len, maxlen = *sizep; 1186 long pos; 1187 int error; 1188 1189 /* 1190 * deal with cases where the message buffer has 1191 * become corrupted. 1192 */ 1193 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1194 msgbufenabled = 0; 1195 return (ENXIO); 1196 } 1197 1198 if (where == NULL) { 1199 /* always return full buffer size */ 1200 *sizep = msgbufp->msg_bufs; 1201 return (0); 1202 } 1203 1204 error = 0; 1205 maxlen = min(msgbufp->msg_bufs, maxlen); 1206 pos = msgbufp->msg_bufx; 1207 while (maxlen > 0) { 1208 len = pos == 0 ? msgbufp->msg_bufx : msgbufp->msg_bufs - msgbufp->msg_bufx; 1209 len = min(len, maxlen); 1210 if (len == 0) 1211 break; 1212 error = copyout(&msgbufp->msg_bufc[pos], where, len); 1213 if (error) 1214 break; 1215 where += len; 1216 maxlen -= len; 1217 pos = 0; 1218 } 1219 return (error); 1220 } 1221 1222 /* 1223 * try over estimating by 5 procs 1224 */ 1225 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1226 1227 static int 1228 sysctl_doeproc(name, namelen, vwhere, sizep) 1229 int *name; 1230 u_int namelen; 1231 void *vwhere; 1232 size_t *sizep; 1233 { 1234 struct eproc eproc; 1235 struct kinfo_proc2 kproc2; 1236 struct kinfo_proc *dp; 1237 struct proc *p; 1238 const struct proclist_desc *pd; 1239 char *where, *dp2; 1240 int type, op, arg, elem_size, elem_count; 1241 int buflen, needed, error; 1242 1243 dp = vwhere; 1244 dp2 = where = vwhere; 1245 buflen = where != NULL ? *sizep : 0; 1246 error = needed = 0; 1247 type = name[0]; 1248 1249 if (type == KERN_PROC) { 1250 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1251 return (EINVAL); 1252 op = name[1]; 1253 if (op != KERN_PROC_ALL) 1254 arg = name[2]; 1255 } else { 1256 if (namelen != 5) 1257 return (EINVAL); 1258 op = name[1]; 1259 arg = name[2]; 1260 elem_size = name[3]; 1261 elem_count = name[4]; 1262 } 1263 1264 proclist_lock_read(); 1265 1266 pd = proclists; 1267 again: 1268 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1269 /* 1270 * Skip embryonic processes. 1271 */ 1272 if (p->p_stat == SIDL) 1273 continue; 1274 /* 1275 * TODO - make more efficient (see notes below). 1276 * do by session. 1277 */ 1278 switch (op) { 1279 1280 case KERN_PROC_PID: 1281 /* could do this with just a lookup */ 1282 if (p->p_pid != (pid_t)arg) 1283 continue; 1284 break; 1285 1286 case KERN_PROC_PGRP: 1287 /* could do this by traversing pgrp */ 1288 if (p->p_pgrp->pg_id != (pid_t)arg) 1289 continue; 1290 break; 1291 1292 case KERN_PROC_SESSION: 1293 if (p->p_session->s_sid != (pid_t)arg) 1294 continue; 1295 break; 1296 1297 case KERN_PROC_TTY: 1298 if (arg == KERN_PROC_TTY_REVOKE) { 1299 if ((p->p_flag & P_CONTROLT) == 0 || 1300 p->p_session->s_ttyp == NULL || 1301 p->p_session->s_ttyvp != NULL) 1302 continue; 1303 } else if ((p->p_flag & P_CONTROLT) == 0 || 1304 p->p_session->s_ttyp == NULL) { 1305 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1306 continue; 1307 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1308 continue; 1309 break; 1310 1311 case KERN_PROC_UID: 1312 if (p->p_ucred->cr_uid != (uid_t)arg) 1313 continue; 1314 break; 1315 1316 case KERN_PROC_RUID: 1317 if (p->p_cred->p_ruid != (uid_t)arg) 1318 continue; 1319 break; 1320 1321 case KERN_PROC_GID: 1322 if (p->p_ucred->cr_gid != (uid_t)arg) 1323 continue; 1324 break; 1325 1326 case KERN_PROC_RGID: 1327 if (p->p_cred->p_rgid != (uid_t)arg) 1328 continue; 1329 break; 1330 1331 case KERN_PROC_ALL: 1332 /* allow everything */ 1333 break; 1334 1335 default: 1336 error = EINVAL; 1337 goto cleanup; 1338 } 1339 if (type == KERN_PROC) { 1340 if (buflen >= sizeof(struct kinfo_proc)) { 1341 fill_eproc(p, &eproc); 1342 error = copyout((caddr_t)p, &dp->kp_proc, 1343 sizeof(struct proc)); 1344 if (error) 1345 goto cleanup; 1346 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1347 sizeof(eproc)); 1348 if (error) 1349 goto cleanup; 1350 dp++; 1351 buflen -= sizeof(struct kinfo_proc); 1352 } 1353 needed += sizeof(struct kinfo_proc); 1354 } else { /* KERN_PROC2 */ 1355 if (buflen >= elem_size && elem_count > 0) { 1356 fill_kproc2(p, &kproc2); 1357 /* 1358 * Copy out elem_size, but not larger than 1359 * the size of a struct kinfo_proc2. 1360 */ 1361 error = copyout(&kproc2, dp2, 1362 min(sizeof(kproc2), elem_size)); 1363 if (error) 1364 goto cleanup; 1365 dp2 += elem_size; 1366 buflen -= elem_size; 1367 elem_count--; 1368 } 1369 needed += elem_size; 1370 } 1371 } 1372 pd++; 1373 if (pd->pd_list != NULL) 1374 goto again; 1375 proclist_unlock_read(); 1376 1377 if (where != NULL) { 1378 if (type == KERN_PROC) 1379 *sizep = (caddr_t)dp - where; 1380 else 1381 *sizep = dp2 - where; 1382 if (needed > *sizep) 1383 return (ENOMEM); 1384 } else { 1385 needed += KERN_PROCSLOP; 1386 *sizep = needed; 1387 } 1388 return (0); 1389 cleanup: 1390 proclist_unlock_read(); 1391 return (error); 1392 } 1393 1394 /* 1395 * Fill in an eproc structure for the specified process. 1396 */ 1397 void 1398 fill_eproc(p, ep) 1399 struct proc *p; 1400 struct eproc *ep; 1401 { 1402 struct tty *tp; 1403 1404 ep->e_paddr = p; 1405 ep->e_sess = p->p_session; 1406 ep->e_pcred = *p->p_cred; 1407 ep->e_ucred = *p->p_ucred; 1408 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1409 ep->e_vm.vm_rssize = 0; 1410 ep->e_vm.vm_tsize = 0; 1411 ep->e_vm.vm_dsize = 0; 1412 ep->e_vm.vm_ssize = 0; 1413 /* ep->e_vm.vm_pmap = XXX; */ 1414 } else { 1415 struct vmspace *vm = p->p_vmspace; 1416 1417 ep->e_vm.vm_rssize = vm_resident_count(vm); 1418 ep->e_vm.vm_tsize = vm->vm_tsize; 1419 ep->e_vm.vm_dsize = vm->vm_dsize; 1420 ep->e_vm.vm_ssize = vm->vm_ssize; 1421 } 1422 if (p->p_pptr) 1423 ep->e_ppid = p->p_pptr->p_pid; 1424 else 1425 ep->e_ppid = 0; 1426 ep->e_pgid = p->p_pgrp->pg_id; 1427 ep->e_sid = ep->e_sess->s_sid; 1428 ep->e_jobc = p->p_pgrp->pg_jobc; 1429 if ((p->p_flag & P_CONTROLT) && 1430 (tp = ep->e_sess->s_ttyp)) { 1431 ep->e_tdev = tp->t_dev; 1432 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1433 ep->e_tsess = tp->t_session; 1434 } else 1435 ep->e_tdev = NODEV; 1436 if (p->p_wmesg) 1437 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1438 ep->e_xsize = ep->e_xrssize = 0; 1439 ep->e_xccount = ep->e_xswrss = 0; 1440 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1441 if (SESS_LEADER(p)) 1442 ep->e_flag |= EPROC_SLEADER; 1443 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1444 } 1445 1446 /* 1447 * Fill in an eproc structure for the specified process. 1448 */ 1449 static void 1450 fill_kproc2(p, ki) 1451 struct proc *p; 1452 struct kinfo_proc2 *ki; 1453 { 1454 struct tty *tp; 1455 1456 memset(ki, 0, sizeof(*ki)); 1457 1458 ki->p_forw = PTRTOINT64(p->p_forw); 1459 ki->p_back = PTRTOINT64(p->p_back); 1460 ki->p_paddr = PTRTOINT64(p); 1461 1462 ki->p_addr = PTRTOINT64(p->p_addr); 1463 ki->p_fd = PTRTOINT64(p->p_fd); 1464 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1465 ki->p_stats = PTRTOINT64(p->p_stats); 1466 ki->p_limit = PTRTOINT64(p->p_limit); 1467 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1468 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1469 ki->p_sess = PTRTOINT64(p->p_session); 1470 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1471 ki->p_ru = PTRTOINT64(p->p_ru); 1472 1473 ki->p_eflag = 0; 1474 ki->p_exitsig = p->p_exitsig; 1475 ki->p_flag = p->p_flag; 1476 1477 ki->p_pid = p->p_pid; 1478 if (p->p_pptr) 1479 ki->p_ppid = p->p_pptr->p_pid; 1480 else 1481 ki->p_ppid = 0; 1482 ki->p_sid = p->p_session->s_sid; 1483 ki->p__pgid = p->p_pgrp->pg_id; 1484 1485 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1486 1487 ki->p_uid = p->p_ucred->cr_uid; 1488 ki->p_ruid = p->p_cred->p_ruid; 1489 ki->p_gid = p->p_ucred->cr_gid; 1490 ki->p_rgid = p->p_cred->p_rgid; 1491 1492 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1493 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1494 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1495 1496 ki->p_jobc = p->p_pgrp->pg_jobc; 1497 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1498 ki->p_tdev = tp->t_dev; 1499 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1500 ki->p_tsess = PTRTOINT64(tp->t_session); 1501 } else { 1502 ki->p_tdev = NODEV; 1503 } 1504 1505 ki->p_estcpu = p->p_estcpu; 1506 ki->p_rtime_sec = p->p_rtime.tv_sec; 1507 ki->p_rtime_usec = p->p_rtime.tv_usec; 1508 ki->p_cpticks = p->p_cpticks; 1509 ki->p_pctcpu = p->p_pctcpu; 1510 ki->p_swtime = p->p_swtime; 1511 ki->p_slptime = p->p_slptime; 1512 if (p->p_stat == SONPROC) { 1513 KDASSERT(p->p_cpu != NULL); 1514 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1515 } else 1516 ki->p_schedflags = 0; 1517 1518 ki->p_uticks = p->p_uticks; 1519 ki->p_sticks = p->p_sticks; 1520 ki->p_iticks = p->p_iticks; 1521 1522 ki->p_tracep = PTRTOINT64(p->p_tracep); 1523 ki->p_traceflag = p->p_traceflag; 1524 1525 ki->p_holdcnt = p->p_holdcnt; 1526 1527 memcpy(&ki->p_siglist, &p->p_siglist, sizeof(ki_sigset_t)); 1528 memcpy(&ki->p_sigmask, &p->p_sigmask, sizeof(ki_sigset_t)); 1529 memcpy(&ki->p_sigignore, &p->p_sigignore, sizeof(ki_sigset_t)); 1530 memcpy(&ki->p_sigcatch, &p->p_sigcatch, sizeof(ki_sigset_t)); 1531 1532 ki->p_stat = p->p_stat; 1533 ki->p_priority = p->p_priority; 1534 ki->p_usrpri = p->p_usrpri; 1535 ki->p_nice = p->p_nice; 1536 1537 ki->p_xstat = p->p_xstat; 1538 ki->p_acflag = p->p_acflag; 1539 1540 strncpy(ki->p_comm, p->p_comm, 1541 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1542 1543 if (p->p_wmesg) 1544 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1545 ki->p_wchan = PTRTOINT64(p->p_wchan); 1546 1547 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1548 1549 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1550 ki->p_vm_rssize = 0; 1551 ki->p_vm_tsize = 0; 1552 ki->p_vm_dsize = 0; 1553 ki->p_vm_ssize = 0; 1554 } else { 1555 struct vmspace *vm = p->p_vmspace; 1556 1557 ki->p_vm_rssize = vm_resident_count(vm); 1558 ki->p_vm_tsize = vm->vm_tsize; 1559 ki->p_vm_dsize = vm->vm_dsize; 1560 ki->p_vm_ssize = vm->vm_ssize; 1561 } 1562 1563 if (p->p_session->s_ttyvp) 1564 ki->p_eflag |= EPROC_CTTY; 1565 if (SESS_LEADER(p)) 1566 ki->p_eflag |= EPROC_SLEADER; 1567 1568 /* XXX Is this double check necessary? */ 1569 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1570 ki->p_uvalid = 0; 1571 } else { 1572 ki->p_uvalid = 1; 1573 1574 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1575 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1576 1577 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1578 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1579 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1580 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1581 1582 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1583 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1584 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1585 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1586 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1587 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1588 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1589 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1590 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1591 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1592 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1593 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1594 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1595 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1596 1597 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1598 p->p_stats->p_cru.ru_stime.tv_sec; 1599 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1600 p->p_stats->p_cru.ru_stime.tv_usec; 1601 } 1602 } 1603 1604 int 1605 sysctl_procargs(name, namelen, where, sizep, up) 1606 int *name; 1607 u_int namelen; 1608 void *where; 1609 size_t *sizep; 1610 struct proc *up; 1611 { 1612 struct ps_strings pss; 1613 struct proc *p; 1614 size_t len, upper_bound, xlen; 1615 struct uio auio; 1616 struct iovec aiov; 1617 vaddr_t argv; 1618 pid_t pid; 1619 int nargv, type, error, i; 1620 char *arg; 1621 char *tmp; 1622 1623 if (namelen != 2) 1624 return (EINVAL); 1625 pid = name[0]; 1626 type = name[1]; 1627 1628 switch (type) { 1629 case KERN_PROC_ARGV: 1630 case KERN_PROC_NARGV: 1631 case KERN_PROC_ENV: 1632 case KERN_PROC_NENV: 1633 /* ok */ 1634 break; 1635 default: 1636 return (EINVAL); 1637 } 1638 1639 /* check pid */ 1640 if ((p = pfind(pid)) == NULL) 1641 return (EINVAL); 1642 1643 /* only root or same user change look at the environment */ 1644 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1645 if (up->p_ucred->cr_uid != 0) { 1646 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1647 up->p_cred->p_ruid != p->p_cred->p_svuid) 1648 return (EPERM); 1649 } 1650 } 1651 1652 if (sizep != NULL && where == NULL) { 1653 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1654 *sizep = sizeof (int); 1655 else 1656 *sizep = ARG_MAX; /* XXX XXX XXX */ 1657 return (0); 1658 } 1659 if (where == NULL || sizep == NULL) 1660 return (EINVAL); 1661 1662 /* 1663 * Zombies don't have a stack, so we can't read their psstrings. 1664 * System processes also don't have a user stack. 1665 */ 1666 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1667 return (EINVAL); 1668 1669 /* 1670 * Lock the process down in memory. 1671 */ 1672 /* XXXCDC: how should locking work here? */ 1673 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1674 return (EFAULT); 1675 PHOLD(p); 1676 p->p_vmspace->vm_refcnt++; /* XXX */ 1677 1678 /* 1679 * Allocate a temporary buffer to hold the arguments. 1680 */ 1681 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1682 1683 /* 1684 * Read in the ps_strings structure. 1685 */ 1686 aiov.iov_base = &pss; 1687 aiov.iov_len = sizeof(pss); 1688 auio.uio_iov = &aiov; 1689 auio.uio_iovcnt = 1; 1690 auio.uio_offset = (vaddr_t)p->p_psstr; 1691 auio.uio_resid = sizeof(pss); 1692 auio.uio_segflg = UIO_SYSSPACE; 1693 auio.uio_rw = UIO_READ; 1694 auio.uio_procp = NULL; 1695 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1696 if (error) 1697 goto done; 1698 1699 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1700 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1701 else 1702 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1703 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1704 error = copyout(&nargv, where, sizeof(nargv)); 1705 *sizep = sizeof(nargv); 1706 goto done; 1707 } 1708 /* 1709 * Now read the address of the argument vector. 1710 */ 1711 switch (type) { 1712 case KERN_PROC_ARGV: 1713 /* XXX compat32 stuff here */ 1714 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1715 break; 1716 case KERN_PROC_ENV: 1717 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1718 break; 1719 default: 1720 return (EINVAL); 1721 } 1722 auio.uio_offset = (off_t)(long)tmp; 1723 aiov.iov_base = &argv; 1724 aiov.iov_len = sizeof(argv); 1725 auio.uio_iov = &aiov; 1726 auio.uio_iovcnt = 1; 1727 auio.uio_resid = sizeof(argv); 1728 auio.uio_segflg = UIO_SYSSPACE; 1729 auio.uio_rw = UIO_READ; 1730 auio.uio_procp = NULL; 1731 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1732 if (error) 1733 goto done; 1734 1735 /* 1736 * Now copy in the actual argument vector, one page at a time, 1737 * since we don't know how long the vector is (though, we do 1738 * know how many NUL-terminated strings are in the vector). 1739 */ 1740 len = 0; 1741 upper_bound = *sizep; 1742 for (; nargv != 0 && len < upper_bound; len += xlen) { 1743 aiov.iov_base = arg; 1744 aiov.iov_len = PAGE_SIZE; 1745 auio.uio_iov = &aiov; 1746 auio.uio_iovcnt = 1; 1747 auio.uio_offset = argv + len; 1748 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1749 auio.uio_resid = xlen; 1750 auio.uio_segflg = UIO_SYSSPACE; 1751 auio.uio_rw = UIO_READ; 1752 auio.uio_procp = NULL; 1753 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1754 if (error) 1755 goto done; 1756 1757 for (i = 0; i < xlen && nargv != 0; i++) { 1758 if (arg[i] == '\0') 1759 nargv--; /* one full string */ 1760 } 1761 1762 /* make sure we don't copyout past the end of the user's buffer */ 1763 if (len + i > upper_bound) 1764 i = upper_bound - len; 1765 1766 error = copyout(arg, (char *)where + len, i); 1767 if (error) 1768 break; 1769 1770 if (nargv == 0) { 1771 len += i; 1772 break; 1773 } 1774 } 1775 *sizep = len; 1776 1777 done: 1778 PRELE(p); 1779 uvmspace_free(p->p_vmspace); 1780 1781 free(arg, M_TEMP); 1782 return (error); 1783 } 1784
Indexes created Tue Sep 30 07:10:03 GMT 2025