kern_sysctl.c revision 1.80
1 /* $NetBSD: kern_sysctl.c,v 1.80 2000/09/23 11:33:05 bjh21 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 #include "pty.h" 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/kernel.h> 54 #include <sys/buf.h> 55 #include <sys/device.h> 56 #include <sys/disklabel.h> 57 #include <sys/dkstat.h> 58 #include <sys/exec.h> 59 #include <sys/file.h> 60 #include <sys/ioctl.h> 61 #include <sys/malloc.h> 62 #include <sys/mount.h> 63 #include <sys/msgbuf.h> 64 #include <sys/pool.h> 65 #include <sys/proc.h> 66 #include <sys/resource.h> 67 #include <sys/resourcevar.h> 68 #include <sys/syscallargs.h> 69 #include <sys/tty.h> 70 #include <sys/unistd.h> 71 #include <sys/vnode.h> 72 #define __SYSCTL_PRIVATE 73 #include <sys/sysctl.h> 74 #include <sys/lock.h> 75 76 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 77 #include <sys/ipc.h> 78 #endif 79 #ifdef SYSVMSG 80 #include <sys/msg.h> 81 #endif 82 #ifdef SYSVSEM 83 #include <sys/sem.h> 84 #endif 85 #ifdef SYSVSHM 86 #include <sys/shm.h> 87 #endif 88 89 #include <dev/cons.h> 90 91 #if defined(DDB) 92 #include <ddb/ddbvar.h> 93 #endif 94 95 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 96 97 static int sysctl_file __P((void *, size_t *)); 98 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 99 static int sysctl_sysvipc __P((int *, u_int, void *, size_t *)); 100 #endif 101 static int sysctl_msgbuf __P((void *, size_t *)); 102 static int sysctl_doeproc __P((int *, u_int, void *, size_t *)); 103 static void fill_kproc2 __P((struct proc *, struct kinfo_proc2 *)); 104 static int sysctl_procargs __P((int *, u_int, void *, size_t *, struct proc *)); 105 #if NPTY > 0 106 static int sysctl_pty __P((void *, size_t *, void *, size_t)); 107 #endif 108 109 /* 110 * The `sysctl_memlock' is intended to keep too many processes from 111 * locking down memory by doing sysctls at once. Whether or not this 112 * is really a good idea to worry about it probably a subject of some 113 * debate. 114 */ 115 struct lock sysctl_memlock; 116 117 void 118 sysctl_init(void) 119 { 120 121 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 122 } 123 124 int 125 sys___sysctl(p, v, retval) 126 struct proc *p; 127 void *v; 128 register_t *retval; 129 { 130 struct sys___sysctl_args /* { 131 syscallarg(int *) name; 132 syscallarg(u_int) namelen; 133 syscallarg(void *) old; 134 syscallarg(size_t *) oldlenp; 135 syscallarg(void *) new; 136 syscallarg(size_t) newlen; 137 } */ *uap = v; 138 int error; 139 size_t savelen = 0, oldlen = 0; 140 sysctlfn *fn; 141 int name[CTL_MAXNAME]; 142 size_t *oldlenp; 143 144 /* 145 * all top-level sysctl names are non-terminal 146 */ 147 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 148 return (EINVAL); 149 error = copyin(SCARG(uap, name), &name, 150 SCARG(uap, namelen) * sizeof(int)); 151 if (error) 152 return (error); 153 154 /* 155 * For all but CTL_PROC, must be root to change a value. 156 * For CTL_PROC, must be root, or owner of the proc (and not suid), 157 * this is checked in proc_sysctl() (once we know the targer proc). 158 */ 159 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 160 (error = suser(p->p_ucred, &p->p_acflag))) 161 return error; 162 163 switch (name[0]) { 164 case CTL_KERN: 165 fn = kern_sysctl; 166 break; 167 case CTL_HW: 168 fn = hw_sysctl; 169 break; 170 case CTL_VM: 171 fn = uvm_sysctl; 172 break; 173 case CTL_NET: 174 fn = net_sysctl; 175 break; 176 case CTL_VFS: 177 fn = vfs_sysctl; 178 break; 179 case CTL_MACHDEP: 180 fn = cpu_sysctl; 181 break; 182 #ifdef DEBUG 183 case CTL_DEBUG: 184 fn = debug_sysctl; 185 break; 186 #endif 187 #ifdef DDB 188 case CTL_DDB: 189 fn = ddb_sysctl; 190 break; 191 #endif 192 case CTL_PROC: 193 fn = proc_sysctl; 194 break; 195 default: 196 return (EOPNOTSUPP); 197 } 198 199 /* 200 * XXX Hey, we wire `old', but what about `new'? 201 */ 202 203 oldlenp = SCARG(uap, oldlenp); 204 if (oldlenp) { 205 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 206 return (error); 207 oldlenp = &oldlen; 208 } 209 if (SCARG(uap, old) != NULL) { 210 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 211 if (error) 212 return (error); 213 if (uvm_vslock(p, SCARG(uap, old), oldlen, 214 VM_PROT_READ|VM_PROT_WRITE) != KERN_SUCCESS) { 215 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 216 return (EFAULT); 217 } 218 savelen = oldlen; 219 } 220 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 221 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 222 if (SCARG(uap, old) != NULL) { 223 uvm_vsunlock(p, SCARG(uap, old), savelen); 224 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 225 } 226 if (error) 227 return (error); 228 if (SCARG(uap, oldlenp)) 229 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 230 return (error); 231 } 232 233 /* 234 * Attributes stored in the kernel. 235 */ 236 char hostname[MAXHOSTNAMELEN]; 237 int hostnamelen; 238 239 char domainname[MAXHOSTNAMELEN]; 240 int domainnamelen; 241 242 long hostid; 243 244 #ifdef INSECURE 245 int securelevel = -1; 246 #else 247 int securelevel = 0; 248 #endif 249 250 #ifndef DEFCORENAME 251 #define DEFCORENAME "%n.core" 252 #endif 253 char defcorename[MAXPATHLEN] = DEFCORENAME; 254 int defcorenamelen = sizeof(DEFCORENAME); 255 256 extern int kern_logsigexit; 257 extern fixpt_t ccpu; 258 259 /* 260 * kernel related system variables. 261 */ 262 int 263 kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 264 int *name; 265 u_int namelen; 266 void *oldp; 267 size_t *oldlenp; 268 void *newp; 269 size_t newlen; 270 struct proc *p; 271 { 272 int error, level, inthostid; 273 int old_autonicetime; 274 int old_vnodes; 275 dev_t consdev; 276 277 /* All sysctl names at this level, except for a few, are terminal. */ 278 switch (name[0]) { 279 case KERN_PROC: 280 case KERN_PROC2: 281 case KERN_PROF: 282 case KERN_MBUF: 283 case KERN_PROC_ARGS: 284 case KERN_SYSVIPC_INFO: 285 /* Not terminal. */ 286 break; 287 default: 288 if (namelen != 1) 289 return (ENOTDIR); /* overloaded */ 290 } 291 292 switch (name[0]) { 293 case KERN_OSTYPE: 294 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 295 case KERN_OSRELEASE: 296 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 297 case KERN_OSREV: 298 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 299 case KERN_VERSION: 300 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 301 case KERN_MAXVNODES: 302 old_vnodes = desiredvnodes; 303 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 304 if (old_vnodes > desiredvnodes) { 305 desiredvnodes = old_vnodes; 306 return (EINVAL); 307 } 308 return (error); 309 case KERN_MAXPROC: 310 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 311 case KERN_MAXFILES: 312 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 313 case KERN_ARGMAX: 314 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 315 case KERN_SECURELVL: 316 level = securelevel; 317 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 318 newp == NULL) 319 return (error); 320 if (level < securelevel && p->p_pid != 1) 321 return (EPERM); 322 securelevel = level; 323 return (0); 324 case KERN_HOSTNAME: 325 error = sysctl_string(oldp, oldlenp, newp, newlen, 326 hostname, sizeof(hostname)); 327 if (newp && !error) 328 hostnamelen = newlen; 329 return (error); 330 case KERN_DOMAINNAME: 331 error = sysctl_string(oldp, oldlenp, newp, newlen, 332 domainname, sizeof(domainname)); 333 if (newp && !error) 334 domainnamelen = newlen; 335 return (error); 336 case KERN_HOSTID: 337 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 338 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 339 hostid = inthostid; 340 return (error); 341 case KERN_CLOCKRATE: 342 return (sysctl_clockrate(oldp, oldlenp)); 343 case KERN_BOOTTIME: 344 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 345 sizeof(struct timeval))); 346 case KERN_VNODE: 347 return (sysctl_vnode(oldp, oldlenp, p)); 348 case KERN_PROC: 349 case KERN_PROC2: 350 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 351 case KERN_PROC_ARGS: 352 return (sysctl_procargs(name + 1, namelen - 1, 353 oldp, oldlenp, p)); 354 case KERN_FILE: 355 return (sysctl_file(oldp, oldlenp)); 356 #ifdef GPROF 357 case KERN_PROF: 358 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 359 newp, newlen)); 360 #endif 361 case KERN_POSIX1: 362 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 363 case KERN_NGROUPS: 364 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 365 case KERN_JOB_CONTROL: 366 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 367 case KERN_SAVED_IDS: 368 #ifdef _POSIX_SAVED_IDS 369 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 370 #else 371 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 372 #endif 373 case KERN_MAXPARTITIONS: 374 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 375 case KERN_RAWPARTITION: 376 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 377 #ifdef NTP 378 case KERN_NTPTIME: 379 return (sysctl_ntptime(oldp, oldlenp)); 380 #endif 381 case KERN_AUTONICETIME: 382 old_autonicetime = autonicetime; 383 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 384 if (autonicetime < 0) 385 autonicetime = old_autonicetime; 386 return (error); 387 case KERN_AUTONICEVAL: 388 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 389 if (autoniceval < PRIO_MIN) 390 autoniceval = PRIO_MIN; 391 if (autoniceval > PRIO_MAX) 392 autoniceval = PRIO_MAX; 393 return (error); 394 case KERN_RTC_OFFSET: 395 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 396 case KERN_ROOT_DEVICE: 397 return (sysctl_rdstring(oldp, oldlenp, newp, 398 root_device->dv_xname)); 399 case KERN_MSGBUFSIZE: 400 /* 401 * deal with cases where the message buffer has 402 * become corrupted. 403 */ 404 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 405 msgbufenabled = 0; 406 return (ENXIO); 407 } 408 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 409 case KERN_FSYNC: 410 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 411 case KERN_SYSVMSG: 412 #ifdef SYSVMSG 413 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 414 #else 415 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 416 #endif 417 case KERN_SYSVSEM: 418 #ifdef SYSVSEM 419 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 420 #else 421 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 422 #endif 423 case KERN_SYSVSHM: 424 #ifdef SYSVSHM 425 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 426 #else 427 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 428 #endif 429 case KERN_DEFCORENAME: 430 if (newp && newlen < 1) 431 return (EINVAL); 432 error = sysctl_string(oldp, oldlenp, newp, newlen, 433 defcorename, sizeof(defcorename)); 434 if (newp && !error) 435 defcorenamelen = newlen; 436 return (error); 437 case KERN_SYNCHRONIZED_IO: 438 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 439 case KERN_IOV_MAX: 440 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 441 case KERN_MBUF: 442 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 443 newp, newlen)); 444 case KERN_MAPPED_FILES: 445 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 446 case KERN_MEMLOCK: 447 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 448 case KERN_MEMLOCK_RANGE: 449 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 450 case KERN_MEMORY_PROTECTION: 451 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 452 case KERN_LOGIN_NAME_MAX: 453 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 454 case KERN_LOGSIGEXIT: 455 return (sysctl_int(oldp, oldlenp, newp, newlen, 456 &kern_logsigexit)); 457 case KERN_FSCALE: 458 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 459 case KERN_CCPU: 460 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 461 case KERN_CP_TIME: 462 /* XXXSMP: WRONG! */ 463 return (sysctl_rdstruct(oldp, oldlenp, newp, 464 curcpu()->ci_schedstate.spc_cp_time, 465 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 466 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 467 case KERN_SYSVIPC_INFO: 468 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 469 #endif 470 case KERN_MSGBUF: 471 return (sysctl_msgbuf(oldp, oldlenp)); 472 case KERN_CONSDEV: 473 if (cn_tab != NULL) 474 consdev = cn_tab->cn_dev; 475 else 476 consdev = NODEV; 477 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 478 sizeof consdev)); 479 #if NPTY > 0 480 case KERN_MAXPTYS: 481 return sysctl_pty(oldp, oldlenp, newp, newlen); 482 #endif 483 default: 484 return (EOPNOTSUPP); 485 } 486 /* NOTREACHED */ 487 } 488 489 /* 490 * hardware related system variables. 491 */ 492 int 493 hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 494 int *name; 495 u_int namelen; 496 void *oldp; 497 size_t *oldlenp; 498 void *newp; 499 size_t newlen; 500 struct proc *p; 501 { 502 503 /* all sysctl names at this level are terminal */ 504 if (namelen != 1) 505 return (ENOTDIR); /* overloaded */ 506 507 switch (name[0]) { 508 case HW_MACHINE: 509 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 510 case HW_MACHINE_ARCH: 511 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 512 case HW_MODEL: 513 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 514 case HW_NCPU: 515 return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */ 516 case HW_BYTEORDER: 517 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 518 case HW_PHYSMEM: 519 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 520 case HW_USERMEM: 521 return (sysctl_rdint(oldp, oldlenp, newp, 522 ctob(physmem - uvmexp.wired))); 523 case HW_PAGESIZE: 524 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 525 case HW_ALIGNBYTES: 526 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 527 default: 528 return (EOPNOTSUPP); 529 } 530 /* NOTREACHED */ 531 } 532 533 #ifdef DEBUG 534 /* 535 * Debugging related system variables. 536 */ 537 struct ctldebug debug0, debug1, debug2, debug3, debug4; 538 struct ctldebug debug5, debug6, debug7, debug8, debug9; 539 struct ctldebug debug10, debug11, debug12, debug13, debug14; 540 struct ctldebug debug15, debug16, debug17, debug18, debug19; 541 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 542 &debug0, &debug1, &debug2, &debug3, &debug4, 543 &debug5, &debug6, &debug7, &debug8, &debug9, 544 &debug10, &debug11, &debug12, &debug13, &debug14, 545 &debug15, &debug16, &debug17, &debug18, &debug19, 546 }; 547 int 548 debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 549 int *name; 550 u_int namelen; 551 void *oldp; 552 size_t *oldlenp; 553 void *newp; 554 size_t newlen; 555 struct proc *p; 556 { 557 struct ctldebug *cdp; 558 559 /* all sysctl names at this level are name and field */ 560 if (namelen != 2) 561 return (ENOTDIR); /* overloaded */ 562 cdp = debugvars[name[0]]; 563 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 564 return (EOPNOTSUPP); 565 switch (name[1]) { 566 case CTL_DEBUG_NAME: 567 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 568 case CTL_DEBUG_VALUE: 569 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 570 default: 571 return (EOPNOTSUPP); 572 } 573 /* NOTREACHED */ 574 } 575 #endif /* DEBUG */ 576 577 int 578 proc_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 579 int *name; 580 u_int namelen; 581 void *oldp; 582 size_t *oldlenp; 583 void *newp; 584 size_t newlen; 585 struct proc *p; 586 { 587 struct proc *ptmp = NULL; 588 const struct proclist_desc *pd; 589 int error = 0; 590 struct rlimit alim; 591 struct plimit *newplim; 592 char *tmps = NULL; 593 int i, curlen, len; 594 595 if (namelen < 2) 596 return EINVAL; 597 598 if (name[0] == PROC_CURPROC) { 599 ptmp = p; 600 } else { 601 proclist_lock_read(); 602 for (pd = proclists; pd->pd_list != NULL; pd++) { 603 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 604 ptmp = LIST_NEXT(ptmp, p_list)) { 605 /* Skip embryonic processes. */ 606 if (ptmp->p_stat == SIDL) 607 continue; 608 if (ptmp->p_pid == (pid_t)name[0]) 609 break; 610 } 611 if (ptmp != NULL) 612 break; 613 } 614 proclist_unlock_read(); 615 if (ptmp == NULL) 616 return(ESRCH); 617 if (p->p_ucred->cr_uid != 0) { 618 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 619 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 620 return EPERM; 621 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 622 return EPERM; /* sgid proc */ 623 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 624 if (p->p_ucred->cr_groups[i] == 625 ptmp->p_cred->p_rgid) 626 break; 627 } 628 if (i == p->p_ucred->cr_ngroups) 629 return EPERM; 630 } 631 } 632 if (name[1] == PROC_PID_CORENAME) { 633 if (namelen != 2) 634 return EINVAL; 635 /* 636 * Can't use sysctl_string() here because we may malloc a new 637 * area during the process, so we have to do it by hand. 638 */ 639 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 640 if (oldlenp && *oldlenp < curlen) { 641 if (!oldp) 642 *oldlenp = curlen; 643 return (ENOMEM); 644 } 645 if (newp) { 646 if (securelevel > 2) 647 return EPERM; 648 if (newlen > MAXPATHLEN) 649 return ENAMETOOLONG; 650 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 651 if (tmps == NULL) 652 return ENOMEM; 653 error = copyin(newp, tmps, newlen + 1); 654 tmps[newlen] = '\0'; 655 if (error) 656 goto cleanup; 657 /* Enforce to be either 'core' for end with '.core' */ 658 if (newlen < 4) { /* c.o.r.e */ 659 error = EINVAL; 660 goto cleanup; 661 } 662 len = newlen - 4; 663 if (len > 0) { 664 if (tmps[len - 1] != '.' && 665 tmps[len - 1] != '/') { 666 error = EINVAL; 667 goto cleanup; 668 } 669 } 670 if (strcmp(&tmps[len], "core") != 0) { 671 error = EINVAL; 672 goto cleanup; 673 } 674 } 675 if (oldp && oldlenp) { 676 *oldlenp = curlen; 677 error = copyout(ptmp->p_limit->pl_corename, oldp, 678 curlen); 679 } 680 if (newp && error == 0) { 681 /* if the 2 strings are identical, don't limcopy() */ 682 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 683 error = 0; 684 goto cleanup; 685 } 686 if (ptmp->p_limit->p_refcnt > 1 && 687 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 688 newplim = limcopy(ptmp->p_limit); 689 limfree(ptmp->p_limit); 690 ptmp->p_limit = newplim; 691 } else if (ptmp->p_limit->pl_corename != defcorename) { 692 free(ptmp->p_limit->pl_corename, M_TEMP); 693 } 694 ptmp->p_limit->pl_corename = tmps; 695 return (0); 696 } 697 cleanup: 698 if (tmps) 699 free(tmps, M_TEMP); 700 return (error); 701 } 702 if (name[1] == PROC_PID_LIMIT) { 703 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 704 return EINVAL; 705 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 706 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 707 error = sysctl_quad(oldp, oldlenp, newp, newlen, 708 &alim.rlim_max); 709 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 710 error = sysctl_quad(oldp, oldlenp, newp, newlen, 711 &alim.rlim_cur); 712 else 713 error = EINVAL; 714 715 if (error) 716 return error; 717 718 if (newp) 719 error = dosetrlimit(ptmp, p->p_cred, 720 name[2] - 1, &alim); 721 return error; 722 } 723 return (EINVAL); 724 } 725 726 /* 727 * Convenience macros. 728 */ 729 730 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 731 if (oldlenp) { \ 732 if (!oldp) \ 733 *oldlenp = len; \ 734 else { \ 735 if (*oldlenp < len) \ 736 return(ENOMEM); \ 737 *oldlenp = len; \ 738 error = copyout((caddr_t)valp, oldp, len); \ 739 } \ 740 } 741 742 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 743 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 744 745 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 746 if (newp && newlen != len) \ 747 return (EINVAL); 748 749 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 750 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 751 752 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 753 if (error == 0 && newp) \ 754 error = copyin(newp, valp, len); 755 756 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 757 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 758 759 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 760 if (oldlenp) { \ 761 len = strlen(str) + 1; \ 762 if (!oldp) \ 763 *oldlenp = len; \ 764 else { \ 765 if (*oldlenp < len) { \ 766 err2 = ENOMEM; \ 767 len = *oldlenp; \ 768 } else \ 769 *oldlenp = len; \ 770 error = copyout(str, oldp, len);\ 771 if (error == 0) \ 772 error = err2; \ 773 } \ 774 } 775 776 /* 777 * Validate parameters and get old / set new parameters 778 * for an integer-valued sysctl function. 779 */ 780 int 781 sysctl_int(oldp, oldlenp, newp, newlen, valp) 782 void *oldp; 783 size_t *oldlenp; 784 void *newp; 785 size_t newlen; 786 int *valp; 787 { 788 int error = 0; 789 790 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 791 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 792 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 793 794 return (error); 795 } 796 797 798 /* 799 * As above, but read-only. 800 */ 801 int 802 sysctl_rdint(oldp, oldlenp, newp, val) 803 void *oldp; 804 size_t *oldlenp; 805 void *newp; 806 int val; 807 { 808 int error = 0; 809 810 if (newp) 811 return (EPERM); 812 813 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 814 815 return (error); 816 } 817 818 /* 819 * Validate parameters and get old / set new parameters 820 * for an quad-valued sysctl function. 821 */ 822 int 823 sysctl_quad(oldp, oldlenp, newp, newlen, valp) 824 void *oldp; 825 size_t *oldlenp; 826 void *newp; 827 size_t newlen; 828 quad_t *valp; 829 { 830 int error = 0; 831 832 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 833 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 834 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 835 836 return (error); 837 } 838 839 /* 840 * As above, but read-only. 841 */ 842 int 843 sysctl_rdquad(oldp, oldlenp, newp, val) 844 void *oldp; 845 size_t *oldlenp; 846 void *newp; 847 quad_t val; 848 { 849 int error = 0; 850 851 if (newp) 852 return (EPERM); 853 854 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 855 856 return (error); 857 } 858 859 /* 860 * Validate parameters and get old / set new parameters 861 * for a string-valued sysctl function. 862 */ 863 int 864 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 865 void *oldp; 866 size_t *oldlenp; 867 void *newp; 868 size_t newlen; 869 char *str; 870 int maxlen; 871 { 872 int len, error = 0, err2 = 0; 873 874 if (newp && newlen >= maxlen) 875 return (EINVAL); 876 877 SYSCTL_STRING_CORE(oldp, oldlenp, str); 878 879 if (error == 0 && newp) { 880 error = copyin(newp, str, newlen); 881 str[newlen] = 0; 882 } 883 return (error); 884 } 885 886 /* 887 * As above, but read-only. 888 */ 889 int 890 sysctl_rdstring(oldp, oldlenp, newp, str) 891 void *oldp; 892 size_t *oldlenp; 893 void *newp; 894 const char *str; 895 { 896 int len, error = 0, err2 = 0; 897 898 if (newp) 899 return (EPERM); 900 901 SYSCTL_STRING_CORE(oldp, oldlenp, str); 902 903 return (error); 904 } 905 906 /* 907 * Validate parameters and get old / set new parameters 908 * for a structure oriented sysctl function. 909 */ 910 int 911 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 912 void *oldp; 913 size_t *oldlenp; 914 void *newp; 915 size_t newlen; 916 void *sp; 917 int len; 918 { 919 int error = 0; 920 921 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 922 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 923 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 924 925 return (error); 926 } 927 928 /* 929 * Validate parameters and get old parameters 930 * for a structure oriented sysctl function. 931 */ 932 int 933 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 934 void *oldp; 935 size_t *oldlenp; 936 void *newp; 937 const void *sp; 938 int len; 939 { 940 int error = 0; 941 942 if (newp) 943 return (EPERM); 944 945 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 946 947 return (error); 948 } 949 950 /* 951 * Get file structures. 952 */ 953 static int 954 sysctl_file(vwhere, sizep) 955 void *vwhere; 956 size_t *sizep; 957 { 958 int buflen, error; 959 struct file *fp; 960 char *start, *where; 961 962 start = where = vwhere; 963 buflen = *sizep; 964 if (where == NULL) { 965 /* 966 * overestimate by 10 files 967 */ 968 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 969 return (0); 970 } 971 972 /* 973 * first copyout filehead 974 */ 975 if (buflen < sizeof(filehead)) { 976 *sizep = 0; 977 return (0); 978 } 979 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 980 if (error) 981 return (error); 982 buflen -= sizeof(filehead); 983 where += sizeof(filehead); 984 985 /* 986 * followed by an array of file structures 987 */ 988 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 989 if (buflen < sizeof(struct file)) { 990 *sizep = where - start; 991 return (ENOMEM); 992 } 993 error = copyout((caddr_t)fp, where, sizeof(struct file)); 994 if (error) 995 return (error); 996 buflen -= sizeof(struct file); 997 where += sizeof(struct file); 998 } 999 *sizep = where - start; 1000 return (0); 1001 } 1002 1003 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1004 #define FILL_PERM(src, dst) do { \ 1005 (dst)._key = (src)._key; \ 1006 (dst).uid = (src).uid; \ 1007 (dst).gid = (src).gid; \ 1008 (dst).cuid = (src).cuid; \ 1009 (dst).cgid = (src).cgid; \ 1010 (dst).mode = (src).mode; \ 1011 (dst)._seq = (src)._seq; \ 1012 } while (0); 1013 #define FILL_MSG(src, dst) do { \ 1014 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1015 (dst).msg_qnum = (src).msg_qnum; \ 1016 (dst).msg_qbytes = (src).msg_qbytes; \ 1017 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1018 (dst).msg_lspid = (src).msg_lspid; \ 1019 (dst).msg_lrpid = (src).msg_lrpid; \ 1020 (dst).msg_stime = (src).msg_stime; \ 1021 (dst).msg_rtime = (src).msg_rtime; \ 1022 (dst).msg_ctime = (src).msg_ctime; \ 1023 } while (0) 1024 #define FILL_SEM(src, dst) do { \ 1025 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1026 (dst).sem_nsems = (src).sem_nsems; \ 1027 (dst).sem_otime = (src).sem_otime; \ 1028 (dst).sem_ctime = (src).sem_ctime; \ 1029 } while (0) 1030 #define FILL_SHM(src, dst) do { \ 1031 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1032 (dst).shm_segsz = (src).shm_segsz; \ 1033 (dst).shm_lpid = (src).shm_lpid; \ 1034 (dst).shm_cpid = (src).shm_cpid; \ 1035 (dst).shm_atime = (src).shm_atime; \ 1036 (dst).shm_dtime = (src).shm_dtime; \ 1037 (dst).shm_ctime = (src).shm_ctime; \ 1038 (dst).shm_nattch = (src).shm_nattch; \ 1039 } while (0) 1040 1041 static int 1042 sysctl_sysvipc(name, namelen, where, sizep) 1043 int *name; 1044 u_int namelen; 1045 void *where; 1046 size_t *sizep; 1047 { 1048 #ifdef SYSVMSG 1049 struct msg_sysctl_info *msgsi; 1050 #endif 1051 #ifdef SYSVSEM 1052 struct sem_sysctl_info *semsi; 1053 #endif 1054 #ifdef SYSVSHM 1055 struct shm_sysctl_info *shmsi; 1056 #endif 1057 size_t infosize, dssize, tsize, buflen; 1058 void *buf = NULL, *buf2; 1059 char *start; 1060 int32_t nds; 1061 int i, error, ret; 1062 1063 if (namelen != 1) 1064 return (EINVAL); 1065 1066 start = where; 1067 buflen = *sizep; 1068 1069 switch (*name) { 1070 case KERN_SYSVIPC_MSG_INFO: 1071 #ifdef SYSVMSG 1072 infosize = sizeof(msgsi->msginfo); 1073 nds = msginfo.msgmni; 1074 dssize = sizeof(msgsi->msgids[0]); 1075 break; 1076 #else 1077 return (EINVAL); 1078 #endif 1079 case KERN_SYSVIPC_SEM_INFO: 1080 #ifdef SYSVSEM 1081 infosize = sizeof(semsi->seminfo); 1082 nds = seminfo.semmni; 1083 dssize = sizeof(semsi->semids[0]); 1084 break; 1085 #else 1086 return (EINVAL); 1087 #endif 1088 case KERN_SYSVIPC_SHM_INFO: 1089 #ifdef SYSVSHM 1090 infosize = sizeof(shmsi->shminfo); 1091 nds = shminfo.shmmni; 1092 dssize = sizeof(shmsi->shmids[0]); 1093 break; 1094 #else 1095 return (EINVAL); 1096 #endif 1097 default: 1098 return (EINVAL); 1099 } 1100 /* 1101 * Round infosize to 64 bit boundary if requesting more than just 1102 * the info structure or getting the total data size. 1103 */ 1104 if (where == NULL || *sizep > infosize) 1105 infosize = ((infosize + 7) / 8) * 8; 1106 tsize = infosize + nds * dssize; 1107 1108 /* Return just the total size required. */ 1109 if (where == NULL) { 1110 *sizep = tsize; 1111 return (0); 1112 } 1113 1114 /* Not enough room for even the info struct. */ 1115 if (buflen < infosize) { 1116 *sizep = 0; 1117 return (ENOMEM); 1118 } 1119 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1120 memset(buf, 0, min(tsize, buflen)); 1121 1122 switch (*name) { 1123 #ifdef SYSVMSG 1124 case KERN_SYSVIPC_MSG_INFO: 1125 msgsi = (struct msg_sysctl_info *)buf; 1126 buf2 = &msgsi->msgids[0]; 1127 msgsi->msginfo = msginfo; 1128 break; 1129 #endif 1130 #ifdef SYSVSEM 1131 case KERN_SYSVIPC_SEM_INFO: 1132 semsi = (struct sem_sysctl_info *)buf; 1133 buf2 = &semsi->semids[0]; 1134 semsi->seminfo = seminfo; 1135 break; 1136 #endif 1137 #ifdef SYSVSHM 1138 case KERN_SYSVIPC_SHM_INFO: 1139 shmsi = (struct shm_sysctl_info *)buf; 1140 buf2 = &shmsi->shmids[0]; 1141 shmsi->shminfo = shminfo; 1142 break; 1143 #endif 1144 } 1145 buflen -= infosize; 1146 1147 ret = 0; 1148 if (buflen > 0) { 1149 /* Fill in the IPC data structures. */ 1150 for (i = 0; i < nds; i++) { 1151 if (buflen < dssize) { 1152 ret = ENOMEM; 1153 break; 1154 } 1155 switch (*name) { 1156 #ifdef SYSVMSG 1157 case KERN_SYSVIPC_MSG_INFO: 1158 FILL_MSG(msqids[i], msgsi->msgids[i]); 1159 break; 1160 #endif 1161 #ifdef SYSVSEM 1162 case KERN_SYSVIPC_SEM_INFO: 1163 FILL_SEM(sema[i], semsi->semids[i]); 1164 break; 1165 #endif 1166 #ifdef SYSVSHM 1167 case KERN_SYSVIPC_SHM_INFO: 1168 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1169 break; 1170 #endif 1171 } 1172 buflen -= dssize; 1173 } 1174 } 1175 *sizep -= buflen; 1176 error = copyout(buf, start, *sizep); 1177 /* If copyout succeeded, use return code set earlier. */ 1178 if (error == 0) 1179 error = ret; 1180 if (buf) 1181 free(buf, M_TEMP); 1182 return (error); 1183 } 1184 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1185 1186 static int 1187 sysctl_msgbuf(vwhere, sizep) 1188 void *vwhere; 1189 size_t *sizep; 1190 { 1191 char *where = vwhere; 1192 size_t len, maxlen = *sizep; 1193 long pos; 1194 int error; 1195 1196 /* 1197 * deal with cases where the message buffer has 1198 * become corrupted. 1199 */ 1200 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1201 msgbufenabled = 0; 1202 return (ENXIO); 1203 } 1204 1205 if (where == NULL) { 1206 /* always return full buffer size */ 1207 *sizep = msgbufp->msg_bufs; 1208 return (0); 1209 } 1210 1211 error = 0; 1212 maxlen = min(msgbufp->msg_bufs, maxlen); 1213 pos = msgbufp->msg_bufx; 1214 while (maxlen > 0) { 1215 len = pos == 0 ? msgbufp->msg_bufx : msgbufp->msg_bufs - msgbufp->msg_bufx; 1216 len = min(len, maxlen); 1217 if (len == 0) 1218 break; 1219 error = copyout(&msgbufp->msg_bufc[pos], where, len); 1220 if (error) 1221 break; 1222 where += len; 1223 maxlen -= len; 1224 pos = 0; 1225 } 1226 return (error); 1227 } 1228 1229 /* 1230 * try over estimating by 5 procs 1231 */ 1232 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1233 1234 static int 1235 sysctl_doeproc(name, namelen, vwhere, sizep) 1236 int *name; 1237 u_int namelen; 1238 void *vwhere; 1239 size_t *sizep; 1240 { 1241 struct eproc eproc; 1242 struct kinfo_proc2 kproc2; 1243 struct kinfo_proc *dp; 1244 struct proc *p; 1245 const struct proclist_desc *pd; 1246 char *where, *dp2; 1247 int type, op, arg, elem_size, elem_count; 1248 int buflen, needed, error; 1249 1250 dp = vwhere; 1251 dp2 = where = vwhere; 1252 buflen = where != NULL ? *sizep : 0; 1253 error = needed = 0; 1254 type = name[0]; 1255 1256 if (type == KERN_PROC) { 1257 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1258 return (EINVAL); 1259 op = name[1]; 1260 if (op != KERN_PROC_ALL) 1261 arg = name[2]; 1262 } else { 1263 if (namelen != 5) 1264 return (EINVAL); 1265 op = name[1]; 1266 arg = name[2]; 1267 elem_size = name[3]; 1268 elem_count = name[4]; 1269 } 1270 1271 proclist_lock_read(); 1272 1273 pd = proclists; 1274 again: 1275 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1276 /* 1277 * Skip embryonic processes. 1278 */ 1279 if (p->p_stat == SIDL) 1280 continue; 1281 /* 1282 * TODO - make more efficient (see notes below). 1283 * do by session. 1284 */ 1285 switch (op) { 1286 1287 case KERN_PROC_PID: 1288 /* could do this with just a lookup */ 1289 if (p->p_pid != (pid_t)arg) 1290 continue; 1291 break; 1292 1293 case KERN_PROC_PGRP: 1294 /* could do this by traversing pgrp */ 1295 if (p->p_pgrp->pg_id != (pid_t)arg) 1296 continue; 1297 break; 1298 1299 case KERN_PROC_SESSION: 1300 if (p->p_session->s_sid != (pid_t)arg) 1301 continue; 1302 break; 1303 1304 case KERN_PROC_TTY: 1305 if (arg == KERN_PROC_TTY_REVOKE) { 1306 if ((p->p_flag & P_CONTROLT) == 0 || 1307 p->p_session->s_ttyp == NULL || 1308 p->p_session->s_ttyvp != NULL) 1309 continue; 1310 } else if ((p->p_flag & P_CONTROLT) == 0 || 1311 p->p_session->s_ttyp == NULL) { 1312 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1313 continue; 1314 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1315 continue; 1316 break; 1317 1318 case KERN_PROC_UID: 1319 if (p->p_ucred->cr_uid != (uid_t)arg) 1320 continue; 1321 break; 1322 1323 case KERN_PROC_RUID: 1324 if (p->p_cred->p_ruid != (uid_t)arg) 1325 continue; 1326 break; 1327 1328 case KERN_PROC_GID: 1329 if (p->p_ucred->cr_gid != (uid_t)arg) 1330 continue; 1331 break; 1332 1333 case KERN_PROC_RGID: 1334 if (p->p_cred->p_rgid != (uid_t)arg) 1335 continue; 1336 break; 1337 1338 case KERN_PROC_ALL: 1339 /* allow everything */ 1340 break; 1341 1342 default: 1343 error = EINVAL; 1344 goto cleanup; 1345 } 1346 if (type == KERN_PROC) { 1347 if (buflen >= sizeof(struct kinfo_proc)) { 1348 fill_eproc(p, &eproc); 1349 error = copyout((caddr_t)p, &dp->kp_proc, 1350 sizeof(struct proc)); 1351 if (error) 1352 goto cleanup; 1353 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1354 sizeof(eproc)); 1355 if (error) 1356 goto cleanup; 1357 dp++; 1358 buflen -= sizeof(struct kinfo_proc); 1359 } 1360 needed += sizeof(struct kinfo_proc); 1361 } else { /* KERN_PROC2 */ 1362 if (buflen >= elem_size && elem_count > 0) { 1363 fill_kproc2(p, &kproc2); 1364 /* 1365 * Copy out elem_size, but not larger than 1366 * the size of a struct kinfo_proc2. 1367 */ 1368 error = copyout(&kproc2, dp2, 1369 min(sizeof(kproc2), elem_size)); 1370 if (error) 1371 goto cleanup; 1372 dp2 += elem_size; 1373 buflen -= elem_size; 1374 elem_count--; 1375 } 1376 needed += elem_size; 1377 } 1378 } 1379 pd++; 1380 if (pd->pd_list != NULL) 1381 goto again; 1382 proclist_unlock_read(); 1383 1384 if (where != NULL) { 1385 if (type == KERN_PROC) 1386 *sizep = (caddr_t)dp - where; 1387 else 1388 *sizep = dp2 - where; 1389 if (needed > *sizep) 1390 return (ENOMEM); 1391 } else { 1392 needed += KERN_PROCSLOP; 1393 *sizep = needed; 1394 } 1395 return (0); 1396 cleanup: 1397 proclist_unlock_read(); 1398 return (error); 1399 } 1400 1401 /* 1402 * Fill in an eproc structure for the specified process. 1403 */ 1404 void 1405 fill_eproc(p, ep) 1406 struct proc *p; 1407 struct eproc *ep; 1408 { 1409 struct tty *tp; 1410 1411 ep->e_paddr = p; 1412 ep->e_sess = p->p_session; 1413 ep->e_pcred = *p->p_cred; 1414 ep->e_ucred = *p->p_ucred; 1415 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1416 ep->e_vm.vm_rssize = 0; 1417 ep->e_vm.vm_tsize = 0; 1418 ep->e_vm.vm_dsize = 0; 1419 ep->e_vm.vm_ssize = 0; 1420 /* ep->e_vm.vm_pmap = XXX; */ 1421 } else { 1422 struct vmspace *vm = p->p_vmspace; 1423 1424 ep->e_vm.vm_rssize = vm_resident_count(vm); 1425 ep->e_vm.vm_tsize = vm->vm_tsize; 1426 ep->e_vm.vm_dsize = vm->vm_dsize; 1427 ep->e_vm.vm_ssize = vm->vm_ssize; 1428 } 1429 if (p->p_pptr) 1430 ep->e_ppid = p->p_pptr->p_pid; 1431 else 1432 ep->e_ppid = 0; 1433 ep->e_pgid = p->p_pgrp->pg_id; 1434 ep->e_sid = ep->e_sess->s_sid; 1435 ep->e_jobc = p->p_pgrp->pg_jobc; 1436 if ((p->p_flag & P_CONTROLT) && 1437 (tp = ep->e_sess->s_ttyp)) { 1438 ep->e_tdev = tp->t_dev; 1439 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1440 ep->e_tsess = tp->t_session; 1441 } else 1442 ep->e_tdev = NODEV; 1443 if (p->p_wmesg) 1444 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1445 ep->e_xsize = ep->e_xrssize = 0; 1446 ep->e_xccount = ep->e_xswrss = 0; 1447 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1448 if (SESS_LEADER(p)) 1449 ep->e_flag |= EPROC_SLEADER; 1450 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1451 } 1452 1453 /* 1454 * Fill in an eproc structure for the specified process. 1455 */ 1456 static void 1457 fill_kproc2(p, ki) 1458 struct proc *p; 1459 struct kinfo_proc2 *ki; 1460 { 1461 struct tty *tp; 1462 1463 memset(ki, 0, sizeof(*ki)); 1464 1465 ki->p_forw = PTRTOINT64(p->p_forw); 1466 ki->p_back = PTRTOINT64(p->p_back); 1467 ki->p_paddr = PTRTOINT64(p); 1468 1469 ki->p_addr = PTRTOINT64(p->p_addr); 1470 ki->p_fd = PTRTOINT64(p->p_fd); 1471 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1472 ki->p_stats = PTRTOINT64(p->p_stats); 1473 ki->p_limit = PTRTOINT64(p->p_limit); 1474 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1475 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1476 ki->p_sess = PTRTOINT64(p->p_session); 1477 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1478 ki->p_ru = PTRTOINT64(p->p_ru); 1479 1480 ki->p_eflag = 0; 1481 ki->p_exitsig = p->p_exitsig; 1482 ki->p_flag = p->p_flag; 1483 1484 ki->p_pid = p->p_pid; 1485 if (p->p_pptr) 1486 ki->p_ppid = p->p_pptr->p_pid; 1487 else 1488 ki->p_ppid = 0; 1489 ki->p_sid = p->p_session->s_sid; 1490 ki->p__pgid = p->p_pgrp->pg_id; 1491 1492 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1493 1494 ki->p_uid = p->p_ucred->cr_uid; 1495 ki->p_ruid = p->p_cred->p_ruid; 1496 ki->p_gid = p->p_ucred->cr_gid; 1497 ki->p_rgid = p->p_cred->p_rgid; 1498 1499 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1500 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1501 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1502 1503 ki->p_jobc = p->p_pgrp->pg_jobc; 1504 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1505 ki->p_tdev = tp->t_dev; 1506 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1507 ki->p_tsess = PTRTOINT64(tp->t_session); 1508 } else { 1509 ki->p_tdev = NODEV; 1510 } 1511 1512 ki->p_estcpu = p->p_estcpu; 1513 ki->p_rtime_sec = p->p_rtime.tv_sec; 1514 ki->p_rtime_usec = p->p_rtime.tv_usec; 1515 ki->p_cpticks = p->p_cpticks; 1516 ki->p_pctcpu = p->p_pctcpu; 1517 ki->p_swtime = p->p_swtime; 1518 ki->p_slptime = p->p_slptime; 1519 if (p->p_stat == SONPROC) { 1520 KDASSERT(p->p_cpu != NULL); 1521 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1522 } else 1523 ki->p_schedflags = 0; 1524 1525 ki->p_uticks = p->p_uticks; 1526 ki->p_sticks = p->p_sticks; 1527 ki->p_iticks = p->p_iticks; 1528 1529 ki->p_tracep = PTRTOINT64(p->p_tracep); 1530 ki->p_traceflag = p->p_traceflag; 1531 1532 ki->p_holdcnt = p->p_holdcnt; 1533 1534 memcpy(&ki->p_siglist, &p->p_siglist, sizeof(ki_sigset_t)); 1535 memcpy(&ki->p_sigmask, &p->p_sigmask, sizeof(ki_sigset_t)); 1536 memcpy(&ki->p_sigignore, &p->p_sigignore, sizeof(ki_sigset_t)); 1537 memcpy(&ki->p_sigcatch, &p->p_sigcatch, sizeof(ki_sigset_t)); 1538 1539 ki->p_stat = p->p_stat; 1540 ki->p_priority = p->p_priority; 1541 ki->p_usrpri = p->p_usrpri; 1542 ki->p_nice = p->p_nice; 1543 1544 ki->p_xstat = p->p_xstat; 1545 ki->p_acflag = p->p_acflag; 1546 1547 strncpy(ki->p_comm, p->p_comm, 1548 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1549 1550 if (p->p_wmesg) 1551 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1552 ki->p_wchan = PTRTOINT64(p->p_wchan); 1553 1554 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1555 1556 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1557 ki->p_vm_rssize = 0; 1558 ki->p_vm_tsize = 0; 1559 ki->p_vm_dsize = 0; 1560 ki->p_vm_ssize = 0; 1561 } else { 1562 struct vmspace *vm = p->p_vmspace; 1563 1564 ki->p_vm_rssize = vm_resident_count(vm); 1565 ki->p_vm_tsize = vm->vm_tsize; 1566 ki->p_vm_dsize = vm->vm_dsize; 1567 ki->p_vm_ssize = vm->vm_ssize; 1568 } 1569 1570 if (p->p_session->s_ttyvp) 1571 ki->p_eflag |= EPROC_CTTY; 1572 if (SESS_LEADER(p)) 1573 ki->p_eflag |= EPROC_SLEADER; 1574 1575 /* XXX Is this double check necessary? */ 1576 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1577 ki->p_uvalid = 0; 1578 } else { 1579 ki->p_uvalid = 1; 1580 1581 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1582 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1583 1584 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1585 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1586 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1587 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1588 1589 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1590 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1591 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1592 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1593 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1594 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1595 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1596 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1597 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1598 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1599 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1600 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1601 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1602 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1603 1604 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1605 p->p_stats->p_cru.ru_stime.tv_sec; 1606 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1607 p->p_stats->p_cru.ru_stime.tv_usec; 1608 } 1609 } 1610 1611 int 1612 sysctl_procargs(name, namelen, where, sizep, up) 1613 int *name; 1614 u_int namelen; 1615 void *where; 1616 size_t *sizep; 1617 struct proc *up; 1618 { 1619 struct ps_strings pss; 1620 struct proc *p; 1621 size_t len, upper_bound, xlen; 1622 struct uio auio; 1623 struct iovec aiov; 1624 vaddr_t argv; 1625 pid_t pid; 1626 int nargv, type, error, i; 1627 char *arg; 1628 char *tmp; 1629 1630 if (namelen != 2) 1631 return (EINVAL); 1632 pid = name[0]; 1633 type = name[1]; 1634 1635 switch (type) { 1636 case KERN_PROC_ARGV: 1637 case KERN_PROC_NARGV: 1638 case KERN_PROC_ENV: 1639 case KERN_PROC_NENV: 1640 /* ok */ 1641 break; 1642 default: 1643 return (EINVAL); 1644 } 1645 1646 /* check pid */ 1647 if ((p = pfind(pid)) == NULL) 1648 return (EINVAL); 1649 1650 /* only root or same user change look at the environment */ 1651 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1652 if (up->p_ucred->cr_uid != 0) { 1653 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1654 up->p_cred->p_ruid != p->p_cred->p_svuid) 1655 return (EPERM); 1656 } 1657 } 1658 1659 if (sizep != NULL && where == NULL) { 1660 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1661 *sizep = sizeof (int); 1662 else 1663 *sizep = ARG_MAX; /* XXX XXX XXX */ 1664 return (0); 1665 } 1666 if (where == NULL || sizep == NULL) 1667 return (EINVAL); 1668 1669 /* 1670 * Zombies don't have a stack, so we can't read their psstrings. 1671 * System processes also don't have a user stack. 1672 */ 1673 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1674 return (EINVAL); 1675 1676 /* 1677 * Lock the process down in memory. 1678 */ 1679 /* XXXCDC: how should locking work here? */ 1680 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1681 return (EFAULT); 1682 PHOLD(p); 1683 p->p_vmspace->vm_refcnt++; /* XXX */ 1684 1685 /* 1686 * Allocate a temporary buffer to hold the arguments. 1687 */ 1688 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1689 1690 /* 1691 * Read in the ps_strings structure. 1692 */ 1693 aiov.iov_base = &pss; 1694 aiov.iov_len = sizeof(pss); 1695 auio.uio_iov = &aiov; 1696 auio.uio_iovcnt = 1; 1697 auio.uio_offset = (vaddr_t)p->p_psstr; 1698 auio.uio_resid = sizeof(pss); 1699 auio.uio_segflg = UIO_SYSSPACE; 1700 auio.uio_rw = UIO_READ; 1701 auio.uio_procp = NULL; 1702 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1703 if (error) 1704 goto done; 1705 1706 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1707 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1708 else 1709 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1710 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1711 error = copyout(&nargv, where, sizeof(nargv)); 1712 *sizep = sizeof(nargv); 1713 goto done; 1714 } 1715 /* 1716 * Now read the address of the argument vector. 1717 */ 1718 switch (type) { 1719 case KERN_PROC_ARGV: 1720 /* XXX compat32 stuff here */ 1721 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1722 break; 1723 case KERN_PROC_ENV: 1724 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1725 break; 1726 default: 1727 return (EINVAL); 1728 } 1729 auio.uio_offset = (off_t)(long)tmp; 1730 aiov.iov_base = &argv; 1731 aiov.iov_len = sizeof(argv); 1732 auio.uio_iov = &aiov; 1733 auio.uio_iovcnt = 1; 1734 auio.uio_resid = sizeof(argv); 1735 auio.uio_segflg = UIO_SYSSPACE; 1736 auio.uio_rw = UIO_READ; 1737 auio.uio_procp = NULL; 1738 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1739 if (error) 1740 goto done; 1741 1742 /* 1743 * Now copy in the actual argument vector, one page at a time, 1744 * since we don't know how long the vector is (though, we do 1745 * know how many NUL-terminated strings are in the vector). 1746 */ 1747 len = 0; 1748 upper_bound = *sizep; 1749 for (; nargv != 0 && len < upper_bound; len += xlen) { 1750 aiov.iov_base = arg; 1751 aiov.iov_len = PAGE_SIZE; 1752 auio.uio_iov = &aiov; 1753 auio.uio_iovcnt = 1; 1754 auio.uio_offset = argv + len; 1755 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1756 auio.uio_resid = xlen; 1757 auio.uio_segflg = UIO_SYSSPACE; 1758 auio.uio_rw = UIO_READ; 1759 auio.uio_procp = NULL; 1760 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1761 if (error) 1762 goto done; 1763 1764 for (i = 0; i < xlen && nargv != 0; i++) { 1765 if (arg[i] == '\0') 1766 nargv--; /* one full string */ 1767 } 1768 1769 /* make sure we don't copyout past the end of the user's buffer */ 1770 if (len + i > upper_bound) 1771 i = upper_bound - len; 1772 1773 error = copyout(arg, (char *)where + len, i); 1774 if (error) 1775 break; 1776 1777 if (nargv == 0) { 1778 len += i; 1779 break; 1780 } 1781 } 1782 *sizep = len; 1783 1784 done: 1785 PRELE(p); 1786 uvmspace_free(p->p_vmspace); 1787 1788 free(arg, M_TEMP); 1789 return (error); 1790 } 1791 1792 #if NPTY > 0 1793 int pty_maxptys __P((int, int)); /* defined in kern/tty_pty.c */ 1794 1795 /* 1796 * Validate parameters and get old / set new parameters 1797 * for pty sysctl function. 1798 */ 1799 static int 1800 sysctl_pty(oldp, oldlenp, newp, newlen) 1801 void *oldp; 1802 size_t *oldlenp; 1803 void *newp; 1804 size_t newlen; 1805 { 1806 int error = 0; 1807 int oldmax = 0, newmax = 0; 1808 1809 /* get current value of maxptys */ 1810 oldmax = pty_maxptys(0, 0); 1811 1812 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1813 1814 if (!error && newp) { 1815 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1816 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1817 1818 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1819 return (EINVAL); 1820 1821 } 1822 1823 return (error); 1824 } 1825 #endif /* NPTY > 0 */ 1826
Indexes created Tue Sep 30 07:10:03 GMT 2025