kern_sysctl.c revision 1.79
1 /* $NetBSD: kern_sysctl.c,v 1.79 2000/09/11 18:45:29 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95 39 */ 40 41 /* 42 * sysctl system call. 43 */ 44 45 #include "opt_ddb.h" 46 #include "opt_insecure.h" 47 #include "opt_defcorename.h" 48 #include "opt_sysv.h" 49 #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 static int sysctl_pty __P((void *, size_t *, void *, size_t)); 106 107 /* 108 * The `sysctl_memlock' is intended to keep too many processes from 109 * locking down memory by doing sysctls at once. Whether or not this 110 * is really a good idea to worry about it probably a subject of some 111 * debate. 112 */ 113 struct lock sysctl_memlock; 114 115 void 116 sysctl_init(void) 117 { 118 119 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 120 } 121 122 int 123 sys___sysctl(p, v, retval) 124 struct proc *p; 125 void *v; 126 register_t *retval; 127 { 128 struct sys___sysctl_args /* { 129 syscallarg(int *) name; 130 syscallarg(u_int) namelen; 131 syscallarg(void *) old; 132 syscallarg(size_t *) oldlenp; 133 syscallarg(void *) new; 134 syscallarg(size_t) newlen; 135 } */ *uap = v; 136 int error; 137 size_t savelen = 0, oldlen = 0; 138 sysctlfn *fn; 139 int name[CTL_MAXNAME]; 140 size_t *oldlenp; 141 142 /* 143 * all top-level sysctl names are non-terminal 144 */ 145 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 146 return (EINVAL); 147 error = copyin(SCARG(uap, name), &name, 148 SCARG(uap, namelen) * sizeof(int)); 149 if (error) 150 return (error); 151 152 /* 153 * For all but CTL_PROC, must be root to change a value. 154 * For CTL_PROC, must be root, or owner of the proc (and not suid), 155 * this is checked in proc_sysctl() (once we know the targer proc). 156 */ 157 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 158 (error = suser(p->p_ucred, &p->p_acflag))) 159 return error; 160 161 switch (name[0]) { 162 case CTL_KERN: 163 fn = kern_sysctl; 164 break; 165 case CTL_HW: 166 fn = hw_sysctl; 167 break; 168 case CTL_VM: 169 fn = uvm_sysctl; 170 break; 171 case CTL_NET: 172 fn = net_sysctl; 173 break; 174 case CTL_VFS: 175 fn = vfs_sysctl; 176 break; 177 case CTL_MACHDEP: 178 fn = cpu_sysctl; 179 break; 180 #ifdef DEBUG 181 case CTL_DEBUG: 182 fn = debug_sysctl; 183 break; 184 #endif 185 #ifdef DDB 186 case CTL_DDB: 187 fn = ddb_sysctl; 188 break; 189 #endif 190 case CTL_PROC: 191 fn = proc_sysctl; 192 break; 193 default: 194 return (EOPNOTSUPP); 195 } 196 197 /* 198 * XXX Hey, we wire `old', but what about `new'? 199 */ 200 201 oldlenp = SCARG(uap, oldlenp); 202 if (oldlenp) { 203 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 204 return (error); 205 oldlenp = &oldlen; 206 } 207 if (SCARG(uap, old) != NULL) { 208 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 209 if (error) 210 return (error); 211 if (uvm_vslock(p, SCARG(uap, old), oldlen, 212 VM_PROT_READ|VM_PROT_WRITE) != KERN_SUCCESS) { 213 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 214 return (EFAULT); 215 } 216 savelen = oldlen; 217 } 218 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 219 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 220 if (SCARG(uap, old) != NULL) { 221 uvm_vsunlock(p, SCARG(uap, old), savelen); 222 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 223 } 224 if (error) 225 return (error); 226 if (SCARG(uap, oldlenp)) 227 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 228 return (error); 229 } 230 231 /* 232 * Attributes stored in the kernel. 233 */ 234 char hostname[MAXHOSTNAMELEN]; 235 int hostnamelen; 236 237 char domainname[MAXHOSTNAMELEN]; 238 int domainnamelen; 239 240 long hostid; 241 242 #ifdef INSECURE 243 int securelevel = -1; 244 #else 245 int securelevel = 0; 246 #endif 247 248 #ifndef DEFCORENAME 249 #define DEFCORENAME "%n.core" 250 #endif 251 char defcorename[MAXPATHLEN] = DEFCORENAME; 252 int defcorenamelen = sizeof(DEFCORENAME); 253 254 extern int kern_logsigexit; 255 extern fixpt_t ccpu; 256 257 /* 258 * kernel related system variables. 259 */ 260 int 261 kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 262 int *name; 263 u_int namelen; 264 void *oldp; 265 size_t *oldlenp; 266 void *newp; 267 size_t newlen; 268 struct proc *p; 269 { 270 int error, level, inthostid; 271 int old_autonicetime; 272 int old_vnodes; 273 dev_t consdev; 274 275 /* All sysctl names at this level, except for a few, are terminal. */ 276 switch (name[0]) { 277 case KERN_PROC: 278 case KERN_PROC2: 279 case KERN_PROF: 280 case KERN_MBUF: 281 case KERN_PROC_ARGS: 282 case KERN_SYSVIPC_INFO: 283 /* Not terminal. */ 284 break; 285 default: 286 if (namelen != 1) 287 return (ENOTDIR); /* overloaded */ 288 } 289 290 switch (name[0]) { 291 case KERN_OSTYPE: 292 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 293 case KERN_OSRELEASE: 294 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 295 case KERN_OSREV: 296 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 297 case KERN_VERSION: 298 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 299 case KERN_MAXVNODES: 300 old_vnodes = desiredvnodes; 301 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 302 if (old_vnodes > desiredvnodes) { 303 desiredvnodes = old_vnodes; 304 return (EINVAL); 305 } 306 return (error); 307 case KERN_MAXPROC: 308 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 309 case KERN_MAXFILES: 310 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 311 case KERN_ARGMAX: 312 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 313 case KERN_SECURELVL: 314 level = securelevel; 315 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 316 newp == NULL) 317 return (error); 318 if (level < securelevel && p->p_pid != 1) 319 return (EPERM); 320 securelevel = level; 321 return (0); 322 case KERN_HOSTNAME: 323 error = sysctl_string(oldp, oldlenp, newp, newlen, 324 hostname, sizeof(hostname)); 325 if (newp && !error) 326 hostnamelen = newlen; 327 return (error); 328 case KERN_DOMAINNAME: 329 error = sysctl_string(oldp, oldlenp, newp, newlen, 330 domainname, sizeof(domainname)); 331 if (newp && !error) 332 domainnamelen = newlen; 333 return (error); 334 case KERN_HOSTID: 335 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 336 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 337 hostid = inthostid; 338 return (error); 339 case KERN_CLOCKRATE: 340 return (sysctl_clockrate(oldp, oldlenp)); 341 case KERN_BOOTTIME: 342 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 343 sizeof(struct timeval))); 344 case KERN_VNODE: 345 return (sysctl_vnode(oldp, oldlenp, p)); 346 case KERN_PROC: 347 case KERN_PROC2: 348 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 349 case KERN_PROC_ARGS: 350 return (sysctl_procargs(name + 1, namelen - 1, 351 oldp, oldlenp, p)); 352 case KERN_FILE: 353 return (sysctl_file(oldp, oldlenp)); 354 #ifdef GPROF 355 case KERN_PROF: 356 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 357 newp, newlen)); 358 #endif 359 case KERN_POSIX1: 360 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 361 case KERN_NGROUPS: 362 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 363 case KERN_JOB_CONTROL: 364 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 365 case KERN_SAVED_IDS: 366 #ifdef _POSIX_SAVED_IDS 367 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 368 #else 369 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 370 #endif 371 case KERN_MAXPARTITIONS: 372 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 373 case KERN_RAWPARTITION: 374 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 375 #ifdef NTP 376 case KERN_NTPTIME: 377 return (sysctl_ntptime(oldp, oldlenp)); 378 #endif 379 case KERN_AUTONICETIME: 380 old_autonicetime = autonicetime; 381 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 382 if (autonicetime < 0) 383 autonicetime = old_autonicetime; 384 return (error); 385 case KERN_AUTONICEVAL: 386 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 387 if (autoniceval < PRIO_MIN) 388 autoniceval = PRIO_MIN; 389 if (autoniceval > PRIO_MAX) 390 autoniceval = PRIO_MAX; 391 return (error); 392 case KERN_RTC_OFFSET: 393 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 394 case KERN_ROOT_DEVICE: 395 return (sysctl_rdstring(oldp, oldlenp, newp, 396 root_device->dv_xname)); 397 case KERN_MSGBUFSIZE: 398 /* 399 * deal with cases where the message buffer has 400 * become corrupted. 401 */ 402 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 403 msgbufenabled = 0; 404 return (ENXIO); 405 } 406 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 407 case KERN_FSYNC: 408 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 409 case KERN_SYSVMSG: 410 #ifdef SYSVMSG 411 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 412 #else 413 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 414 #endif 415 case KERN_SYSVSEM: 416 #ifdef SYSVSEM 417 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 418 #else 419 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 420 #endif 421 case KERN_SYSVSHM: 422 #ifdef SYSVSHM 423 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 424 #else 425 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 426 #endif 427 case KERN_DEFCORENAME: 428 if (newp && newlen < 1) 429 return (EINVAL); 430 error = sysctl_string(oldp, oldlenp, newp, newlen, 431 defcorename, sizeof(defcorename)); 432 if (newp && !error) 433 defcorenamelen = newlen; 434 return (error); 435 case KERN_SYNCHRONIZED_IO: 436 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 437 case KERN_IOV_MAX: 438 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 439 case KERN_MBUF: 440 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 441 newp, newlen)); 442 case KERN_MAPPED_FILES: 443 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 444 case KERN_MEMLOCK: 445 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 446 case KERN_MEMLOCK_RANGE: 447 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 448 case KERN_MEMORY_PROTECTION: 449 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 450 case KERN_LOGIN_NAME_MAX: 451 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 452 case KERN_LOGSIGEXIT: 453 return (sysctl_int(oldp, oldlenp, newp, newlen, 454 &kern_logsigexit)); 455 case KERN_FSCALE: 456 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 457 case KERN_CCPU: 458 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 459 case KERN_CP_TIME: 460 /* XXXSMP: WRONG! */ 461 return (sysctl_rdstruct(oldp, oldlenp, newp, 462 curcpu()->ci_schedstate.spc_cp_time, 463 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 464 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 465 case KERN_SYSVIPC_INFO: 466 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 467 #endif 468 case KERN_MSGBUF: 469 return (sysctl_msgbuf(oldp, oldlenp)); 470 case KERN_CONSDEV: 471 if (cn_tab != NULL) 472 consdev = cn_tab->cn_dev; 473 else 474 consdev = NODEV; 475 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 476 sizeof consdev)); 477 #if NPTY > 0 478 case KERN_MAXPTYS: 479 return sysctl_pty(oldp, oldlenp, newp, newlen); 480 #endif 481 default: 482 return (EOPNOTSUPP); 483 } 484 /* NOTREACHED */ 485 } 486 487 /* 488 * hardware related system variables. 489 */ 490 int 491 hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 492 int *name; 493 u_int namelen; 494 void *oldp; 495 size_t *oldlenp; 496 void *newp; 497 size_t newlen; 498 struct proc *p; 499 { 500 501 /* all sysctl names at this level are terminal */ 502 if (namelen != 1) 503 return (ENOTDIR); /* overloaded */ 504 505 switch (name[0]) { 506 case HW_MACHINE: 507 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 508 case HW_MACHINE_ARCH: 509 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 510 case HW_MODEL: 511 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 512 case HW_NCPU: 513 return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */ 514 case HW_BYTEORDER: 515 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 516 case HW_PHYSMEM: 517 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 518 case HW_USERMEM: 519 return (sysctl_rdint(oldp, oldlenp, newp, 520 ctob(physmem - uvmexp.wired))); 521 case HW_PAGESIZE: 522 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 523 case HW_ALIGNBYTES: 524 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 525 default: 526 return (EOPNOTSUPP); 527 } 528 /* NOTREACHED */ 529 } 530 531 #ifdef DEBUG 532 /* 533 * Debugging related system variables. 534 */ 535 struct ctldebug debug0, debug1, debug2, debug3, debug4; 536 struct ctldebug debug5, debug6, debug7, debug8, debug9; 537 struct ctldebug debug10, debug11, debug12, debug13, debug14; 538 struct ctldebug debug15, debug16, debug17, debug18, debug19; 539 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 540 &debug0, &debug1, &debug2, &debug3, &debug4, 541 &debug5, &debug6, &debug7, &debug8, &debug9, 542 &debug10, &debug11, &debug12, &debug13, &debug14, 543 &debug15, &debug16, &debug17, &debug18, &debug19, 544 }; 545 int 546 debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 547 int *name; 548 u_int namelen; 549 void *oldp; 550 size_t *oldlenp; 551 void *newp; 552 size_t newlen; 553 struct proc *p; 554 { 555 struct ctldebug *cdp; 556 557 /* all sysctl names at this level are name and field */ 558 if (namelen != 2) 559 return (ENOTDIR); /* overloaded */ 560 cdp = debugvars[name[0]]; 561 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 562 return (EOPNOTSUPP); 563 switch (name[1]) { 564 case CTL_DEBUG_NAME: 565 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 566 case CTL_DEBUG_VALUE: 567 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 568 default: 569 return (EOPNOTSUPP); 570 } 571 /* NOTREACHED */ 572 } 573 #endif /* DEBUG */ 574 575 int 576 proc_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 577 int *name; 578 u_int namelen; 579 void *oldp; 580 size_t *oldlenp; 581 void *newp; 582 size_t newlen; 583 struct proc *p; 584 { 585 struct proc *ptmp = NULL; 586 const struct proclist_desc *pd; 587 int error = 0; 588 struct rlimit alim; 589 struct plimit *newplim; 590 char *tmps = NULL; 591 int i, curlen, len; 592 593 if (namelen < 2) 594 return EINVAL; 595 596 if (name[0] == PROC_CURPROC) { 597 ptmp = p; 598 } else { 599 proclist_lock_read(); 600 for (pd = proclists; pd->pd_list != NULL; pd++) { 601 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 602 ptmp = LIST_NEXT(ptmp, p_list)) { 603 /* Skip embryonic processes. */ 604 if (ptmp->p_stat == SIDL) 605 continue; 606 if (ptmp->p_pid == (pid_t)name[0]) 607 break; 608 } 609 if (ptmp != NULL) 610 break; 611 } 612 proclist_unlock_read(); 613 if (ptmp == NULL) 614 return(ESRCH); 615 if (p->p_ucred->cr_uid != 0) { 616 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 617 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 618 return EPERM; 619 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 620 return EPERM; /* sgid proc */ 621 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 622 if (p->p_ucred->cr_groups[i] == 623 ptmp->p_cred->p_rgid) 624 break; 625 } 626 if (i == p->p_ucred->cr_ngroups) 627 return EPERM; 628 } 629 } 630 if (name[1] == PROC_PID_CORENAME) { 631 if (namelen != 2) 632 return EINVAL; 633 /* 634 * Can't use sysctl_string() here because we may malloc a new 635 * area during the process, so we have to do it by hand. 636 */ 637 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 638 if (oldlenp && *oldlenp < curlen) { 639 if (!oldp) 640 *oldlenp = curlen; 641 return (ENOMEM); 642 } 643 if (newp) { 644 if (securelevel > 2) 645 return EPERM; 646 if (newlen > MAXPATHLEN) 647 return ENAMETOOLONG; 648 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 649 if (tmps == NULL) 650 return ENOMEM; 651 error = copyin(newp, tmps, newlen + 1); 652 tmps[newlen] = '\0'; 653 if (error) 654 goto cleanup; 655 /* Enforce to be either 'core' for end with '.core' */ 656 if (newlen < 4) { /* c.o.r.e */ 657 error = EINVAL; 658 goto cleanup; 659 } 660 len = newlen - 4; 661 if (len > 0) { 662 if (tmps[len - 1] != '.' && 663 tmps[len - 1] != '/') { 664 error = EINVAL; 665 goto cleanup; 666 } 667 } 668 if (strcmp(&tmps[len], "core") != 0) { 669 error = EINVAL; 670 goto cleanup; 671 } 672 } 673 if (oldp && oldlenp) { 674 *oldlenp = curlen; 675 error = copyout(ptmp->p_limit->pl_corename, oldp, 676 curlen); 677 } 678 if (newp && error == 0) { 679 /* if the 2 strings are identical, don't limcopy() */ 680 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 681 error = 0; 682 goto cleanup; 683 } 684 if (ptmp->p_limit->p_refcnt > 1 && 685 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 686 newplim = limcopy(ptmp->p_limit); 687 limfree(ptmp->p_limit); 688 ptmp->p_limit = newplim; 689 } else if (ptmp->p_limit->pl_corename != defcorename) { 690 free(ptmp->p_limit->pl_corename, M_TEMP); 691 } 692 ptmp->p_limit->pl_corename = tmps; 693 return (0); 694 } 695 cleanup: 696 if (tmps) 697 free(tmps, M_TEMP); 698 return (error); 699 } 700 if (name[1] == PROC_PID_LIMIT) { 701 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 702 return EINVAL; 703 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 704 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 705 error = sysctl_quad(oldp, oldlenp, newp, newlen, 706 &alim.rlim_max); 707 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 708 error = sysctl_quad(oldp, oldlenp, newp, newlen, 709 &alim.rlim_cur); 710 else 711 error = EINVAL; 712 713 if (error) 714 return error; 715 716 if (newp) 717 error = dosetrlimit(ptmp, p->p_cred, 718 name[2] - 1, &alim); 719 return error; 720 } 721 return (EINVAL); 722 } 723 724 /* 725 * Convenience macros. 726 */ 727 728 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 729 if (oldlenp) { \ 730 if (!oldp) \ 731 *oldlenp = len; \ 732 else { \ 733 if (*oldlenp < len) \ 734 return(ENOMEM); \ 735 *oldlenp = len; \ 736 error = copyout((caddr_t)valp, oldp, len); \ 737 } \ 738 } 739 740 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 741 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 742 743 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 744 if (newp && newlen != len) \ 745 return (EINVAL); 746 747 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 748 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 749 750 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 751 if (error == 0 && newp) \ 752 error = copyin(newp, valp, len); 753 754 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 755 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 756 757 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 758 if (oldlenp) { \ 759 len = strlen(str) + 1; \ 760 if (!oldp) \ 761 *oldlenp = len; \ 762 else { \ 763 if (*oldlenp < len) { \ 764 err2 = ENOMEM; \ 765 len = *oldlenp; \ 766 } else \ 767 *oldlenp = len; \ 768 error = copyout(str, oldp, len);\ 769 if (error == 0) \ 770 error = err2; \ 771 } \ 772 } 773 774 /* 775 * Validate parameters and get old / set new parameters 776 * for an integer-valued sysctl function. 777 */ 778 int 779 sysctl_int(oldp, oldlenp, newp, newlen, valp) 780 void *oldp; 781 size_t *oldlenp; 782 void *newp; 783 size_t newlen; 784 int *valp; 785 { 786 int error = 0; 787 788 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 789 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 790 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 791 792 return (error); 793 } 794 795 796 /* 797 * As above, but read-only. 798 */ 799 int 800 sysctl_rdint(oldp, oldlenp, newp, val) 801 void *oldp; 802 size_t *oldlenp; 803 void *newp; 804 int val; 805 { 806 int error = 0; 807 808 if (newp) 809 return (EPERM); 810 811 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 812 813 return (error); 814 } 815 816 /* 817 * Validate parameters and get old / set new parameters 818 * for an quad-valued sysctl function. 819 */ 820 int 821 sysctl_quad(oldp, oldlenp, newp, newlen, valp) 822 void *oldp; 823 size_t *oldlenp; 824 void *newp; 825 size_t newlen; 826 quad_t *valp; 827 { 828 int error = 0; 829 830 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 831 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 832 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 833 834 return (error); 835 } 836 837 /* 838 * As above, but read-only. 839 */ 840 int 841 sysctl_rdquad(oldp, oldlenp, newp, val) 842 void *oldp; 843 size_t *oldlenp; 844 void *newp; 845 quad_t val; 846 { 847 int error = 0; 848 849 if (newp) 850 return (EPERM); 851 852 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 853 854 return (error); 855 } 856 857 /* 858 * Validate parameters and get old / set new parameters 859 * for a string-valued sysctl function. 860 */ 861 int 862 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 863 void *oldp; 864 size_t *oldlenp; 865 void *newp; 866 size_t newlen; 867 char *str; 868 int maxlen; 869 { 870 int len, error = 0, err2 = 0; 871 872 if (newp && newlen >= maxlen) 873 return (EINVAL); 874 875 SYSCTL_STRING_CORE(oldp, oldlenp, str); 876 877 if (error == 0 && newp) { 878 error = copyin(newp, str, newlen); 879 str[newlen] = 0; 880 } 881 return (error); 882 } 883 884 /* 885 * As above, but read-only. 886 */ 887 int 888 sysctl_rdstring(oldp, oldlenp, newp, str) 889 void *oldp; 890 size_t *oldlenp; 891 void *newp; 892 const char *str; 893 { 894 int len, error = 0, err2 = 0; 895 896 if (newp) 897 return (EPERM); 898 899 SYSCTL_STRING_CORE(oldp, oldlenp, str); 900 901 return (error); 902 } 903 904 /* 905 * Validate parameters and get old / set new parameters 906 * for a structure oriented sysctl function. 907 */ 908 int 909 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 910 void *oldp; 911 size_t *oldlenp; 912 void *newp; 913 size_t newlen; 914 void *sp; 915 int len; 916 { 917 int error = 0; 918 919 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 920 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 921 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 922 923 return (error); 924 } 925 926 /* 927 * Validate parameters and get old parameters 928 * for a structure oriented sysctl function. 929 */ 930 int 931 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 932 void *oldp; 933 size_t *oldlenp; 934 void *newp; 935 const void *sp; 936 int len; 937 { 938 int error = 0; 939 940 if (newp) 941 return (EPERM); 942 943 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 944 945 return (error); 946 } 947 948 /* 949 * Get file structures. 950 */ 951 static int 952 sysctl_file(vwhere, sizep) 953 void *vwhere; 954 size_t *sizep; 955 { 956 int buflen, error; 957 struct file *fp; 958 char *start, *where; 959 960 start = where = vwhere; 961 buflen = *sizep; 962 if (where == NULL) { 963 /* 964 * overestimate by 10 files 965 */ 966 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 967 return (0); 968 } 969 970 /* 971 * first copyout filehead 972 */ 973 if (buflen < sizeof(filehead)) { 974 *sizep = 0; 975 return (0); 976 } 977 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 978 if (error) 979 return (error); 980 buflen -= sizeof(filehead); 981 where += sizeof(filehead); 982 983 /* 984 * followed by an array of file structures 985 */ 986 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 987 if (buflen < sizeof(struct file)) { 988 *sizep = where - start; 989 return (ENOMEM); 990 } 991 error = copyout((caddr_t)fp, where, sizeof(struct file)); 992 if (error) 993 return (error); 994 buflen -= sizeof(struct file); 995 where += sizeof(struct file); 996 } 997 *sizep = where - start; 998 return (0); 999 } 1000 1001 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1002 #define FILL_PERM(src, dst) do { \ 1003 (dst)._key = (src)._key; \ 1004 (dst).uid = (src).uid; \ 1005 (dst).gid = (src).gid; \ 1006 (dst).cuid = (src).cuid; \ 1007 (dst).cgid = (src).cgid; \ 1008 (dst).mode = (src).mode; \ 1009 (dst)._seq = (src)._seq; \ 1010 } while (0); 1011 #define FILL_MSG(src, dst) do { \ 1012 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1013 (dst).msg_qnum = (src).msg_qnum; \ 1014 (dst).msg_qbytes = (src).msg_qbytes; \ 1015 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1016 (dst).msg_lspid = (src).msg_lspid; \ 1017 (dst).msg_lrpid = (src).msg_lrpid; \ 1018 (dst).msg_stime = (src).msg_stime; \ 1019 (dst).msg_rtime = (src).msg_rtime; \ 1020 (dst).msg_ctime = (src).msg_ctime; \ 1021 } while (0) 1022 #define FILL_SEM(src, dst) do { \ 1023 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1024 (dst).sem_nsems = (src).sem_nsems; \ 1025 (dst).sem_otime = (src).sem_otime; \ 1026 (dst).sem_ctime = (src).sem_ctime; \ 1027 } while (0) 1028 #define FILL_SHM(src, dst) do { \ 1029 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1030 (dst).shm_segsz = (src).shm_segsz; \ 1031 (dst).shm_lpid = (src).shm_lpid; \ 1032 (dst).shm_cpid = (src).shm_cpid; \ 1033 (dst).shm_atime = (src).shm_atime; \ 1034 (dst).shm_dtime = (src).shm_dtime; \ 1035 (dst).shm_ctime = (src).shm_ctime; \ 1036 (dst).shm_nattch = (src).shm_nattch; \ 1037 } while (0) 1038 1039 static int 1040 sysctl_sysvipc(name, namelen, where, sizep) 1041 int *name; 1042 u_int namelen; 1043 void *where; 1044 size_t *sizep; 1045 { 1046 #ifdef SYSVMSG 1047 struct msg_sysctl_info *msgsi; 1048 #endif 1049 #ifdef SYSVSEM 1050 struct sem_sysctl_info *semsi; 1051 #endif 1052 #ifdef SYSVSHM 1053 struct shm_sysctl_info *shmsi; 1054 #endif 1055 size_t infosize, dssize, tsize, buflen; 1056 void *buf = NULL, *buf2; 1057 char *start; 1058 int32_t nds; 1059 int i, error, ret; 1060 1061 if (namelen != 1) 1062 return (EINVAL); 1063 1064 start = where; 1065 buflen = *sizep; 1066 1067 switch (*name) { 1068 case KERN_SYSVIPC_MSG_INFO: 1069 #ifdef SYSVMSG 1070 infosize = sizeof(msgsi->msginfo); 1071 nds = msginfo.msgmni; 1072 dssize = sizeof(msgsi->msgids[0]); 1073 break; 1074 #else 1075 return (EINVAL); 1076 #endif 1077 case KERN_SYSVIPC_SEM_INFO: 1078 #ifdef SYSVSEM 1079 infosize = sizeof(semsi->seminfo); 1080 nds = seminfo.semmni; 1081 dssize = sizeof(semsi->semids[0]); 1082 break; 1083 #else 1084 return (EINVAL); 1085 #endif 1086 case KERN_SYSVIPC_SHM_INFO: 1087 #ifdef SYSVSHM 1088 infosize = sizeof(shmsi->shminfo); 1089 nds = shminfo.shmmni; 1090 dssize = sizeof(shmsi->shmids[0]); 1091 break; 1092 #else 1093 return (EINVAL); 1094 #endif 1095 default: 1096 return (EINVAL); 1097 } 1098 /* 1099 * Round infosize to 64 bit boundary if requesting more than just 1100 * the info structure or getting the total data size. 1101 */ 1102 if (where == NULL || *sizep > infosize) 1103 infosize = ((infosize + 7) / 8) * 8; 1104 tsize = infosize + nds * dssize; 1105 1106 /* Return just the total size required. */ 1107 if (where == NULL) { 1108 *sizep = tsize; 1109 return (0); 1110 } 1111 1112 /* Not enough room for even the info struct. */ 1113 if (buflen < infosize) { 1114 *sizep = 0; 1115 return (ENOMEM); 1116 } 1117 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1118 memset(buf, 0, min(tsize, buflen)); 1119 1120 switch (*name) { 1121 #ifdef SYSVMSG 1122 case KERN_SYSVIPC_MSG_INFO: 1123 msgsi = (struct msg_sysctl_info *)buf; 1124 buf2 = &msgsi->msgids[0]; 1125 msgsi->msginfo = msginfo; 1126 break; 1127 #endif 1128 #ifdef SYSVSEM 1129 case KERN_SYSVIPC_SEM_INFO: 1130 semsi = (struct sem_sysctl_info *)buf; 1131 buf2 = &semsi->semids[0]; 1132 semsi->seminfo = seminfo; 1133 break; 1134 #endif 1135 #ifdef SYSVSHM 1136 case KERN_SYSVIPC_SHM_INFO: 1137 shmsi = (struct shm_sysctl_info *)buf; 1138 buf2 = &shmsi->shmids[0]; 1139 shmsi->shminfo = shminfo; 1140 break; 1141 #endif 1142 } 1143 buflen -= infosize; 1144 1145 ret = 0; 1146 if (buflen > 0) { 1147 /* Fill in the IPC data structures. */ 1148 for (i = 0; i < nds; i++) { 1149 if (buflen < dssize) { 1150 ret = ENOMEM; 1151 break; 1152 } 1153 switch (*name) { 1154 #ifdef SYSVMSG 1155 case KERN_SYSVIPC_MSG_INFO: 1156 FILL_MSG(msqids[i], msgsi->msgids[i]); 1157 break; 1158 #endif 1159 #ifdef SYSVSEM 1160 case KERN_SYSVIPC_SEM_INFO: 1161 FILL_SEM(sema[i], semsi->semids[i]); 1162 break; 1163 #endif 1164 #ifdef SYSVSHM 1165 case KERN_SYSVIPC_SHM_INFO: 1166 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1167 break; 1168 #endif 1169 } 1170 buflen -= dssize; 1171 } 1172 } 1173 *sizep -= buflen; 1174 error = copyout(buf, start, *sizep); 1175 /* If copyout succeeded, use return code set earlier. */ 1176 if (error == 0) 1177 error = ret; 1178 if (buf) 1179 free(buf, M_TEMP); 1180 return (error); 1181 } 1182 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1183 1184 static int 1185 sysctl_msgbuf(vwhere, sizep) 1186 void *vwhere; 1187 size_t *sizep; 1188 { 1189 char *where = vwhere; 1190 size_t len, maxlen = *sizep; 1191 long pos; 1192 int error; 1193 1194 /* 1195 * deal with cases where the message buffer has 1196 * become corrupted. 1197 */ 1198 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1199 msgbufenabled = 0; 1200 return (ENXIO); 1201 } 1202 1203 if (where == NULL) { 1204 /* always return full buffer size */ 1205 *sizep = msgbufp->msg_bufs; 1206 return (0); 1207 } 1208 1209 error = 0; 1210 maxlen = min(msgbufp->msg_bufs, maxlen); 1211 pos = msgbufp->msg_bufx; 1212 while (maxlen > 0) { 1213 len = pos == 0 ? msgbufp->msg_bufx : msgbufp->msg_bufs - msgbufp->msg_bufx; 1214 len = min(len, maxlen); 1215 if (len == 0) 1216 break; 1217 error = copyout(&msgbufp->msg_bufc[pos], where, len); 1218 if (error) 1219 break; 1220 where += len; 1221 maxlen -= len; 1222 pos = 0; 1223 } 1224 return (error); 1225 } 1226 1227 /* 1228 * try over estimating by 5 procs 1229 */ 1230 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1231 1232 static int 1233 sysctl_doeproc(name, namelen, vwhere, sizep) 1234 int *name; 1235 u_int namelen; 1236 void *vwhere; 1237 size_t *sizep; 1238 { 1239 struct eproc eproc; 1240 struct kinfo_proc2 kproc2; 1241 struct kinfo_proc *dp; 1242 struct proc *p; 1243 const struct proclist_desc *pd; 1244 char *where, *dp2; 1245 int type, op, arg, elem_size, elem_count; 1246 int buflen, needed, error; 1247 1248 dp = vwhere; 1249 dp2 = where = vwhere; 1250 buflen = where != NULL ? *sizep : 0; 1251 error = needed = 0; 1252 type = name[0]; 1253 1254 if (type == KERN_PROC) { 1255 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1256 return (EINVAL); 1257 op = name[1]; 1258 if (op != KERN_PROC_ALL) 1259 arg = name[2]; 1260 } else { 1261 if (namelen != 5) 1262 return (EINVAL); 1263 op = name[1]; 1264 arg = name[2]; 1265 elem_size = name[3]; 1266 elem_count = name[4]; 1267 } 1268 1269 proclist_lock_read(); 1270 1271 pd = proclists; 1272 again: 1273 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1274 /* 1275 * Skip embryonic processes. 1276 */ 1277 if (p->p_stat == SIDL) 1278 continue; 1279 /* 1280 * TODO - make more efficient (see notes below). 1281 * do by session. 1282 */ 1283 switch (op) { 1284 1285 case KERN_PROC_PID: 1286 /* could do this with just a lookup */ 1287 if (p->p_pid != (pid_t)arg) 1288 continue; 1289 break; 1290 1291 case KERN_PROC_PGRP: 1292 /* could do this by traversing pgrp */ 1293 if (p->p_pgrp->pg_id != (pid_t)arg) 1294 continue; 1295 break; 1296 1297 case KERN_PROC_SESSION: 1298 if (p->p_session->s_sid != (pid_t)arg) 1299 continue; 1300 break; 1301 1302 case KERN_PROC_TTY: 1303 if (arg == KERN_PROC_TTY_REVOKE) { 1304 if ((p->p_flag & P_CONTROLT) == 0 || 1305 p->p_session->s_ttyp == NULL || 1306 p->p_session->s_ttyvp != NULL) 1307 continue; 1308 } else if ((p->p_flag & P_CONTROLT) == 0 || 1309 p->p_session->s_ttyp == NULL) { 1310 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1311 continue; 1312 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1313 continue; 1314 break; 1315 1316 case KERN_PROC_UID: 1317 if (p->p_ucred->cr_uid != (uid_t)arg) 1318 continue; 1319 break; 1320 1321 case KERN_PROC_RUID: 1322 if (p->p_cred->p_ruid != (uid_t)arg) 1323 continue; 1324 break; 1325 1326 case KERN_PROC_GID: 1327 if (p->p_ucred->cr_gid != (uid_t)arg) 1328 continue; 1329 break; 1330 1331 case KERN_PROC_RGID: 1332 if (p->p_cred->p_rgid != (uid_t)arg) 1333 continue; 1334 break; 1335 1336 case KERN_PROC_ALL: 1337 /* allow everything */ 1338 break; 1339 1340 default: 1341 error = EINVAL; 1342 goto cleanup; 1343 } 1344 if (type == KERN_PROC) { 1345 if (buflen >= sizeof(struct kinfo_proc)) { 1346 fill_eproc(p, &eproc); 1347 error = copyout((caddr_t)p, &dp->kp_proc, 1348 sizeof(struct proc)); 1349 if (error) 1350 goto cleanup; 1351 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1352 sizeof(eproc)); 1353 if (error) 1354 goto cleanup; 1355 dp++; 1356 buflen -= sizeof(struct kinfo_proc); 1357 } 1358 needed += sizeof(struct kinfo_proc); 1359 } else { /* KERN_PROC2 */ 1360 if (buflen >= elem_size && elem_count > 0) { 1361 fill_kproc2(p, &kproc2); 1362 /* 1363 * Copy out elem_size, but not larger than 1364 * the size of a struct kinfo_proc2. 1365 */ 1366 error = copyout(&kproc2, dp2, 1367 min(sizeof(kproc2), elem_size)); 1368 if (error) 1369 goto cleanup; 1370 dp2 += elem_size; 1371 buflen -= elem_size; 1372 elem_count--; 1373 } 1374 needed += elem_size; 1375 } 1376 } 1377 pd++; 1378 if (pd->pd_list != NULL) 1379 goto again; 1380 proclist_unlock_read(); 1381 1382 if (where != NULL) { 1383 if (type == KERN_PROC) 1384 *sizep = (caddr_t)dp - where; 1385 else 1386 *sizep = dp2 - where; 1387 if (needed > *sizep) 1388 return (ENOMEM); 1389 } else { 1390 needed += KERN_PROCSLOP; 1391 *sizep = needed; 1392 } 1393 return (0); 1394 cleanup: 1395 proclist_unlock_read(); 1396 return (error); 1397 } 1398 1399 /* 1400 * Fill in an eproc structure for the specified process. 1401 */ 1402 void 1403 fill_eproc(p, ep) 1404 struct proc *p; 1405 struct eproc *ep; 1406 { 1407 struct tty *tp; 1408 1409 ep->e_paddr = p; 1410 ep->e_sess = p->p_session; 1411 ep->e_pcred = *p->p_cred; 1412 ep->e_ucred = *p->p_ucred; 1413 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1414 ep->e_vm.vm_rssize = 0; 1415 ep->e_vm.vm_tsize = 0; 1416 ep->e_vm.vm_dsize = 0; 1417 ep->e_vm.vm_ssize = 0; 1418 /* ep->e_vm.vm_pmap = XXX; */ 1419 } else { 1420 struct vmspace *vm = p->p_vmspace; 1421 1422 ep->e_vm.vm_rssize = vm_resident_count(vm); 1423 ep->e_vm.vm_tsize = vm->vm_tsize; 1424 ep->e_vm.vm_dsize = vm->vm_dsize; 1425 ep->e_vm.vm_ssize = vm->vm_ssize; 1426 } 1427 if (p->p_pptr) 1428 ep->e_ppid = p->p_pptr->p_pid; 1429 else 1430 ep->e_ppid = 0; 1431 ep->e_pgid = p->p_pgrp->pg_id; 1432 ep->e_sid = ep->e_sess->s_sid; 1433 ep->e_jobc = p->p_pgrp->pg_jobc; 1434 if ((p->p_flag & P_CONTROLT) && 1435 (tp = ep->e_sess->s_ttyp)) { 1436 ep->e_tdev = tp->t_dev; 1437 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1438 ep->e_tsess = tp->t_session; 1439 } else 1440 ep->e_tdev = NODEV; 1441 if (p->p_wmesg) 1442 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1443 ep->e_xsize = ep->e_xrssize = 0; 1444 ep->e_xccount = ep->e_xswrss = 0; 1445 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1446 if (SESS_LEADER(p)) 1447 ep->e_flag |= EPROC_SLEADER; 1448 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1449 } 1450 1451 /* 1452 * Fill in an eproc structure for the specified process. 1453 */ 1454 static void 1455 fill_kproc2(p, ki) 1456 struct proc *p; 1457 struct kinfo_proc2 *ki; 1458 { 1459 struct tty *tp; 1460 1461 memset(ki, 0, sizeof(*ki)); 1462 1463 ki->p_forw = PTRTOINT64(p->p_forw); 1464 ki->p_back = PTRTOINT64(p->p_back); 1465 ki->p_paddr = PTRTOINT64(p); 1466 1467 ki->p_addr = PTRTOINT64(p->p_addr); 1468 ki->p_fd = PTRTOINT64(p->p_fd); 1469 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1470 ki->p_stats = PTRTOINT64(p->p_stats); 1471 ki->p_limit = PTRTOINT64(p->p_limit); 1472 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1473 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1474 ki->p_sess = PTRTOINT64(p->p_session); 1475 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1476 ki->p_ru = PTRTOINT64(p->p_ru); 1477 1478 ki->p_eflag = 0; 1479 ki->p_exitsig = p->p_exitsig; 1480 ki->p_flag = p->p_flag; 1481 1482 ki->p_pid = p->p_pid; 1483 if (p->p_pptr) 1484 ki->p_ppid = p->p_pptr->p_pid; 1485 else 1486 ki->p_ppid = 0; 1487 ki->p_sid = p->p_session->s_sid; 1488 ki->p__pgid = p->p_pgrp->pg_id; 1489 1490 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1491 1492 ki->p_uid = p->p_ucred->cr_uid; 1493 ki->p_ruid = p->p_cred->p_ruid; 1494 ki->p_gid = p->p_ucred->cr_gid; 1495 ki->p_rgid = p->p_cred->p_rgid; 1496 1497 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1498 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1499 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1500 1501 ki->p_jobc = p->p_pgrp->pg_jobc; 1502 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1503 ki->p_tdev = tp->t_dev; 1504 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1505 ki->p_tsess = PTRTOINT64(tp->t_session); 1506 } else { 1507 ki->p_tdev = NODEV; 1508 } 1509 1510 ki->p_estcpu = p->p_estcpu; 1511 ki->p_rtime_sec = p->p_rtime.tv_sec; 1512 ki->p_rtime_usec = p->p_rtime.tv_usec; 1513 ki->p_cpticks = p->p_cpticks; 1514 ki->p_pctcpu = p->p_pctcpu; 1515 ki->p_swtime = p->p_swtime; 1516 ki->p_slptime = p->p_slptime; 1517 if (p->p_stat == SONPROC) { 1518 KDASSERT(p->p_cpu != NULL); 1519 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1520 } else 1521 ki->p_schedflags = 0; 1522 1523 ki->p_uticks = p->p_uticks; 1524 ki->p_sticks = p->p_sticks; 1525 ki->p_iticks = p->p_iticks; 1526 1527 ki->p_tracep = PTRTOINT64(p->p_tracep); 1528 ki->p_traceflag = p->p_traceflag; 1529 1530 ki->p_holdcnt = p->p_holdcnt; 1531 1532 memcpy(&ki->p_siglist, &p->p_siglist, sizeof(ki_sigset_t)); 1533 memcpy(&ki->p_sigmask, &p->p_sigmask, sizeof(ki_sigset_t)); 1534 memcpy(&ki->p_sigignore, &p->p_sigignore, sizeof(ki_sigset_t)); 1535 memcpy(&ki->p_sigcatch, &p->p_sigcatch, sizeof(ki_sigset_t)); 1536 1537 ki->p_stat = p->p_stat; 1538 ki->p_priority = p->p_priority; 1539 ki->p_usrpri = p->p_usrpri; 1540 ki->p_nice = p->p_nice; 1541 1542 ki->p_xstat = p->p_xstat; 1543 ki->p_acflag = p->p_acflag; 1544 1545 strncpy(ki->p_comm, p->p_comm, 1546 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1547 1548 if (p->p_wmesg) 1549 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1550 ki->p_wchan = PTRTOINT64(p->p_wchan); 1551 1552 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1553 1554 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1555 ki->p_vm_rssize = 0; 1556 ki->p_vm_tsize = 0; 1557 ki->p_vm_dsize = 0; 1558 ki->p_vm_ssize = 0; 1559 } else { 1560 struct vmspace *vm = p->p_vmspace; 1561 1562 ki->p_vm_rssize = vm_resident_count(vm); 1563 ki->p_vm_tsize = vm->vm_tsize; 1564 ki->p_vm_dsize = vm->vm_dsize; 1565 ki->p_vm_ssize = vm->vm_ssize; 1566 } 1567 1568 if (p->p_session->s_ttyvp) 1569 ki->p_eflag |= EPROC_CTTY; 1570 if (SESS_LEADER(p)) 1571 ki->p_eflag |= EPROC_SLEADER; 1572 1573 /* XXX Is this double check necessary? */ 1574 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1575 ki->p_uvalid = 0; 1576 } else { 1577 ki->p_uvalid = 1; 1578 1579 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1580 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1581 1582 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1583 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1584 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1585 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1586 1587 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1588 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1589 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1590 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1591 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1592 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1593 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1594 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1595 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1596 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1597 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1598 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1599 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1600 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1601 1602 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1603 p->p_stats->p_cru.ru_stime.tv_sec; 1604 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1605 p->p_stats->p_cru.ru_stime.tv_usec; 1606 } 1607 } 1608 1609 int 1610 sysctl_procargs(name, namelen, where, sizep, up) 1611 int *name; 1612 u_int namelen; 1613 void *where; 1614 size_t *sizep; 1615 struct proc *up; 1616 { 1617 struct ps_strings pss; 1618 struct proc *p; 1619 size_t len, upper_bound, xlen; 1620 struct uio auio; 1621 struct iovec aiov; 1622 vaddr_t argv; 1623 pid_t pid; 1624 int nargv, type, error, i; 1625 char *arg; 1626 char *tmp; 1627 1628 if (namelen != 2) 1629 return (EINVAL); 1630 pid = name[0]; 1631 type = name[1]; 1632 1633 switch (type) { 1634 case KERN_PROC_ARGV: 1635 case KERN_PROC_NARGV: 1636 case KERN_PROC_ENV: 1637 case KERN_PROC_NENV: 1638 /* ok */ 1639 break; 1640 default: 1641 return (EINVAL); 1642 } 1643 1644 /* check pid */ 1645 if ((p = pfind(pid)) == NULL) 1646 return (EINVAL); 1647 1648 /* only root or same user change look at the environment */ 1649 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1650 if (up->p_ucred->cr_uid != 0) { 1651 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1652 up->p_cred->p_ruid != p->p_cred->p_svuid) 1653 return (EPERM); 1654 } 1655 } 1656 1657 if (sizep != NULL && where == NULL) { 1658 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1659 *sizep = sizeof (int); 1660 else 1661 *sizep = ARG_MAX; /* XXX XXX XXX */ 1662 return (0); 1663 } 1664 if (where == NULL || sizep == NULL) 1665 return (EINVAL); 1666 1667 /* 1668 * Zombies don't have a stack, so we can't read their psstrings. 1669 * System processes also don't have a user stack. 1670 */ 1671 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1672 return (EINVAL); 1673 1674 /* 1675 * Lock the process down in memory. 1676 */ 1677 /* XXXCDC: how should locking work here? */ 1678 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1679 return (EFAULT); 1680 PHOLD(p); 1681 p->p_vmspace->vm_refcnt++; /* XXX */ 1682 1683 /* 1684 * Allocate a temporary buffer to hold the arguments. 1685 */ 1686 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1687 1688 /* 1689 * Read in the ps_strings structure. 1690 */ 1691 aiov.iov_base = &pss; 1692 aiov.iov_len = sizeof(pss); 1693 auio.uio_iov = &aiov; 1694 auio.uio_iovcnt = 1; 1695 auio.uio_offset = (vaddr_t)p->p_psstr; 1696 auio.uio_resid = sizeof(pss); 1697 auio.uio_segflg = UIO_SYSSPACE; 1698 auio.uio_rw = UIO_READ; 1699 auio.uio_procp = NULL; 1700 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1701 if (error) 1702 goto done; 1703 1704 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1705 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1706 else 1707 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1708 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1709 error = copyout(&nargv, where, sizeof(nargv)); 1710 *sizep = sizeof(nargv); 1711 goto done; 1712 } 1713 /* 1714 * Now read the address of the argument vector. 1715 */ 1716 switch (type) { 1717 case KERN_PROC_ARGV: 1718 /* XXX compat32 stuff here */ 1719 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1720 break; 1721 case KERN_PROC_ENV: 1722 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1723 break; 1724 default: 1725 return (EINVAL); 1726 } 1727 auio.uio_offset = (off_t)(long)tmp; 1728 aiov.iov_base = &argv; 1729 aiov.iov_len = sizeof(argv); 1730 auio.uio_iov = &aiov; 1731 auio.uio_iovcnt = 1; 1732 auio.uio_resid = sizeof(argv); 1733 auio.uio_segflg = UIO_SYSSPACE; 1734 auio.uio_rw = UIO_READ; 1735 auio.uio_procp = NULL; 1736 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1737 if (error) 1738 goto done; 1739 1740 /* 1741 * Now copy in the actual argument vector, one page at a time, 1742 * since we don't know how long the vector is (though, we do 1743 * know how many NUL-terminated strings are in the vector). 1744 */ 1745 len = 0; 1746 upper_bound = *sizep; 1747 for (; nargv != 0 && len < upper_bound; len += xlen) { 1748 aiov.iov_base = arg; 1749 aiov.iov_len = PAGE_SIZE; 1750 auio.uio_iov = &aiov; 1751 auio.uio_iovcnt = 1; 1752 auio.uio_offset = argv + len; 1753 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1754 auio.uio_resid = xlen; 1755 auio.uio_segflg = UIO_SYSSPACE; 1756 auio.uio_rw = UIO_READ; 1757 auio.uio_procp = NULL; 1758 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1759 if (error) 1760 goto done; 1761 1762 for (i = 0; i < xlen && nargv != 0; i++) { 1763 if (arg[i] == '\0') 1764 nargv--; /* one full string */ 1765 } 1766 1767 /* make sure we don't copyout past the end of the user's buffer */ 1768 if (len + i > upper_bound) 1769 i = upper_bound - len; 1770 1771 error = copyout(arg, (char *)where + len, i); 1772 if (error) 1773 break; 1774 1775 if (nargv == 0) { 1776 len += i; 1777 break; 1778 } 1779 } 1780 *sizep = len; 1781 1782 done: 1783 PRELE(p); 1784 uvmspace_free(p->p_vmspace); 1785 1786 free(arg, M_TEMP); 1787 return (error); 1788 } 1789 1790 #if NPTY > 0 1791 int pty_maxptys __P((int, int)); /* defined in kern/tty_pty.c */ 1792 1793 /* 1794 * Validate parameters and get old / set new parameters 1795 * for pty sysctl function. 1796 */ 1797 static int 1798 sysctl_pty(oldp, oldlenp, newp, newlen) 1799 void *oldp; 1800 size_t *oldlenp; 1801 void *newp; 1802 size_t newlen; 1803 { 1804 int error = 0; 1805 int oldmax = 0, newmax = 0; 1806 1807 /* get current value of maxptys */ 1808 oldmax = pty_maxptys(0, 0); 1809 1810 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1811 1812 if (!error && newp) { 1813 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1814 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1815 1816 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1817 return (EINVAL); 1818 1819 } 1820 1821 return (error); 1822 } 1823 #endif /* NPTY > 0 */ 1824
Indexes created Sun Sep 21 14:09:52 GMT 2025