kern_sysctl.c revision 1.73.2.7
1 /* $NetBSD: kern_sysctl.c,v 1.73.2.7 2003/08/27 08:41:14 msaitoh Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95 39 */ 40 41 /* 42 * sysctl system call. 43 */ 44 45 #include "opt_ddb.h" 46 #include "opt_insecure.h" 47 #include "opt_defcorename.h" 48 #include "opt_sysv.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/kernel.h> 53 #include <sys/buf.h> 54 #include <sys/device.h> 55 #include <sys/disklabel.h> 56 #include <sys/dkstat.h> 57 #include <sys/exec.h> 58 #include <sys/file.h> 59 #include <sys/ioctl.h> 60 #include <sys/malloc.h> 61 #include <sys/mount.h> 62 #include <sys/msgbuf.h> 63 #include <sys/pool.h> 64 #include <sys/proc.h> 65 #include <sys/resource.h> 66 #include <sys/resourcevar.h> 67 #include <sys/syscallargs.h> 68 #include <sys/tty.h> 69 #include <sys/unistd.h> 70 #include <sys/vnode.h> 71 #define __SYSCTL_PRIVATE 72 #include <sys/sysctl.h> 73 #include <sys/lock.h> 74 75 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 76 #include <sys/ipc.h> 77 #endif 78 #ifdef SYSVMSG 79 #include <sys/msg.h> 80 #endif 81 #ifdef SYSVSEM 82 #include <sys/sem.h> 83 #endif 84 #ifdef SYSVSHM 85 #include <sys/shm.h> 86 #endif 87 88 #include <dev/cons.h> 89 90 #if defined(DDB) 91 #include <ddb/ddbvar.h> 92 #endif 93 94 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 95 96 static int sysctl_file __P((void *, size_t *)); 97 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 98 static int sysctl_sysvipc __P((int *, u_int, void *, size_t *)); 99 #endif 100 static int sysctl_msgbuf __P((void *, size_t *)); 101 static int sysctl_doeproc __P((int *, u_int, void *, size_t *)); 102 static void fill_kproc2 __P((struct proc *, struct kinfo_proc2 *)); 103 static int sysctl_procargs __P((int *, u_int, void *, size_t *, struct proc *)); 104 105 /* 106 * The `sysctl_memlock' is intended to keep too many processes from 107 * locking down memory by doing sysctls at once. Whether or not this 108 * is really a good idea to worry about it probably a subject of some 109 * debate. 110 */ 111 struct lock sysctl_memlock; 112 113 void 114 sysctl_init(void) 115 { 116 117 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 118 } 119 120 int 121 sys___sysctl(p, v, retval) 122 struct proc *p; 123 void *v; 124 register_t *retval; 125 { 126 struct sys___sysctl_args /* { 127 syscallarg(int *) name; 128 syscallarg(u_int) namelen; 129 syscallarg(void *) old; 130 syscallarg(size_t *) oldlenp; 131 syscallarg(void *) new; 132 syscallarg(size_t) newlen; 133 } */ *uap = v; 134 int error; 135 size_t savelen = 0, oldlen = 0; 136 sysctlfn *fn; 137 int name[CTL_MAXNAME]; 138 139 /* 140 * all top-level sysctl names are non-terminal 141 */ 142 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 143 return (EINVAL); 144 error = copyin(SCARG(uap, name), &name, 145 SCARG(uap, namelen) * sizeof(int)); 146 if (error) 147 return (error); 148 149 /* 150 * For all but CTL_PROC, must be root to change a value. 151 * For CTL_PROC, must be root, or owner of the proc (and not suid), 152 * this is checked in proc_sysctl() (once we know the targer proc). 153 */ 154 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 155 (error = suser(p->p_ucred, &p->p_acflag))) 156 return error; 157 158 switch (name[0]) { 159 case CTL_KERN: 160 fn = kern_sysctl; 161 break; 162 case CTL_HW: 163 fn = hw_sysctl; 164 break; 165 case CTL_VM: 166 fn = uvm_sysctl; 167 break; 168 case CTL_NET: 169 fn = net_sysctl; 170 break; 171 case CTL_VFS: 172 fn = vfs_sysctl; 173 break; 174 case CTL_MACHDEP: 175 fn = cpu_sysctl; 176 break; 177 #ifdef DEBUG 178 case CTL_DEBUG: 179 fn = debug_sysctl; 180 break; 181 #endif 182 #ifdef DDB 183 case CTL_DDB: 184 fn = ddb_sysctl; 185 break; 186 #endif 187 case CTL_PROC: 188 fn = proc_sysctl; 189 break; 190 default: 191 return (EOPNOTSUPP); 192 } 193 194 /* 195 * XXX Hey, we wire `old', but what about `new'? 196 */ 197 198 if (SCARG(uap, oldlenp)) { 199 if ((error = copyin(SCARG(uap, oldlenp), &oldlen, 200 sizeof(oldlen)))) 201 return (error); 202 } 203 if (SCARG(uap, old) != NULL) { 204 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 205 if (error) 206 return (error); 207 if (uvm_vslock(p, SCARG(uap, old), oldlen, 208 VM_PROT_READ|VM_PROT_WRITE) != KERN_SUCCESS) { 209 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 210 return (EFAULT); 211 } 212 savelen = oldlen; 213 } 214 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 215 &oldlen, SCARG(uap, new), SCARG(uap, newlen), p); 216 if (SCARG(uap, old) != NULL) { 217 uvm_vsunlock(p, SCARG(uap, old), savelen); 218 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 219 } 220 if (error) 221 return (error); 222 if (SCARG(uap, oldlenp)) 223 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 224 return (error); 225 } 226 227 /* 228 * Attributes stored in the kernel. 229 */ 230 char hostname[MAXHOSTNAMELEN]; 231 int hostnamelen; 232 233 char domainname[MAXHOSTNAMELEN]; 234 int domainnamelen; 235 236 long hostid; 237 238 #ifdef INSECURE 239 int securelevel = -1; 240 #else 241 int securelevel = 0; 242 #endif 243 244 #ifndef DEFCORENAME 245 #define DEFCORENAME "%n.core" 246 #endif 247 char defcorename[MAXPATHLEN] = DEFCORENAME; 248 int defcorenamelen = sizeof(DEFCORENAME); 249 250 extern int kern_logsigexit; 251 extern fixpt_t ccpu; 252 253 /* 254 * kernel related system variables. 255 */ 256 int 257 kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 258 int *name; 259 u_int namelen; 260 void *oldp; 261 size_t *oldlenp; 262 void *newp; 263 size_t newlen; 264 struct proc *p; 265 { 266 int error, level, inthostid; 267 int old_autonicetime; 268 int old_vnodes; 269 dev_t consdev; 270 271 /* All sysctl names at this level, except for a few, are terminal. */ 272 switch (name[0]) { 273 case KERN_PROC: 274 case KERN_PROC2: 275 case KERN_PROF: 276 case KERN_MBUF: 277 case KERN_PROC_ARGS: 278 case KERN_SYSVIPC_INFO: 279 /* Not terminal. */ 280 break; 281 default: 282 if (namelen != 1) 283 return (ENOTDIR); /* overloaded */ 284 } 285 286 switch (name[0]) { 287 case KERN_OSTYPE: 288 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 289 case KERN_OSRELEASE: 290 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 291 case KERN_OSREV: 292 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 293 case KERN_VERSION: 294 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 295 case KERN_MAXVNODES: 296 old_vnodes = desiredvnodes; 297 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 298 if (old_vnodes > desiredvnodes) { 299 desiredvnodes = old_vnodes; 300 return (EINVAL); 301 } 302 return (error); 303 case KERN_MAXPROC: 304 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 305 case KERN_MAXFILES: 306 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 307 case KERN_ARGMAX: 308 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 309 case KERN_SECURELVL: 310 level = securelevel; 311 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 312 newp == NULL) 313 return (error); 314 if (level < securelevel && p->p_pid != 1) 315 return (EPERM); 316 securelevel = level; 317 return (0); 318 case KERN_HOSTNAME: 319 error = sysctl_string(oldp, oldlenp, newp, newlen, 320 hostname, sizeof(hostname)); 321 if (newp && !error) 322 hostnamelen = newlen; 323 return (error); 324 case KERN_DOMAINNAME: 325 error = sysctl_string(oldp, oldlenp, newp, newlen, 326 domainname, sizeof(domainname)); 327 if (newp && !error) 328 domainnamelen = newlen; 329 return (error); 330 case KERN_HOSTID: 331 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 332 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 333 hostid = inthostid; 334 return (error); 335 case KERN_CLOCKRATE: 336 return (sysctl_clockrate(oldp, oldlenp)); 337 case KERN_BOOTTIME: 338 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 339 sizeof(struct timeval))); 340 case KERN_VNODE: 341 return (sysctl_vnode(oldp, oldlenp, p)); 342 case KERN_PROC: 343 case KERN_PROC2: 344 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 345 case KERN_PROC_ARGS: 346 return (sysctl_procargs(name + 1, namelen - 1, 347 oldp, oldlenp, p)); 348 case KERN_FILE: 349 return (sysctl_file(oldp, oldlenp)); 350 #ifdef GPROF 351 case KERN_PROF: 352 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 353 newp, newlen)); 354 #endif 355 case KERN_POSIX1: 356 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 357 case KERN_NGROUPS: 358 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 359 case KERN_JOB_CONTROL: 360 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 361 case KERN_SAVED_IDS: 362 #ifdef _POSIX_SAVED_IDS 363 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 364 #else 365 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 366 #endif 367 case KERN_MAXPARTITIONS: 368 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 369 case KERN_RAWPARTITION: 370 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 371 #ifdef NTP 372 case KERN_NTPTIME: 373 return (sysctl_ntptime(oldp, oldlenp)); 374 #endif 375 case KERN_AUTONICETIME: 376 old_autonicetime = autonicetime; 377 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 378 if (autonicetime < 0) 379 autonicetime = old_autonicetime; 380 return (error); 381 case KERN_AUTONICEVAL: 382 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 383 if (autoniceval < PRIO_MIN) 384 autoniceval = PRIO_MIN; 385 if (autoniceval > PRIO_MAX) 386 autoniceval = PRIO_MAX; 387 return (error); 388 case KERN_RTC_OFFSET: 389 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 390 case KERN_ROOT_DEVICE: 391 return (sysctl_rdstring(oldp, oldlenp, newp, 392 root_device->dv_xname)); 393 case KERN_MSGBUFSIZE: 394 /* 395 * deal with cases where the message buffer has 396 * become corrupted. 397 */ 398 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 399 msgbufenabled = 0; 400 return (ENXIO); 401 } 402 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 403 case KERN_FSYNC: 404 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 405 case KERN_SYSVMSG: 406 #ifdef SYSVMSG 407 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 408 #else 409 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 410 #endif 411 case KERN_SYSVSEM: 412 #ifdef SYSVSEM 413 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 414 #else 415 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 416 #endif 417 case KERN_SYSVSHM: 418 #ifdef SYSVSHM 419 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 420 #else 421 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 422 #endif 423 case KERN_DEFCORENAME: 424 if (newp && newlen < 1) 425 return (EINVAL); 426 error = sysctl_string(oldp, oldlenp, newp, newlen, 427 defcorename, sizeof(defcorename)); 428 if (newp && !error) 429 defcorenamelen = newlen; 430 return (error); 431 case KERN_SYNCHRONIZED_IO: 432 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 433 case KERN_IOV_MAX: 434 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 435 case KERN_MBUF: 436 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 437 newp, newlen)); 438 case KERN_MAPPED_FILES: 439 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 440 case KERN_MEMLOCK: 441 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 442 case KERN_MEMLOCK_RANGE: 443 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 444 case KERN_MEMORY_PROTECTION: 445 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 446 case KERN_LOGIN_NAME_MAX: 447 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 448 case KERN_LOGSIGEXIT: 449 return (sysctl_int(oldp, oldlenp, newp, newlen, 450 &kern_logsigexit)); 451 case KERN_FSCALE: 452 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 453 case KERN_CCPU: 454 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 455 case KERN_CP_TIME: 456 /* XXXSMP: WRONG! */ 457 return (sysctl_rdstruct(oldp, oldlenp, newp, 458 curcpu()->ci_schedstate.spc_cp_time, 459 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 460 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 461 case KERN_SYSVIPC_INFO: 462 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 463 #endif 464 case KERN_MSGBUF: 465 return (sysctl_msgbuf(oldp, oldlenp)); 466 case KERN_CONSDEV: 467 if (cn_tab != NULL) 468 consdev = cn_tab->cn_dev; 469 else 470 consdev = NODEV; 471 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 472 sizeof consdev)); 473 default: 474 return (EOPNOTSUPP); 475 } 476 /* NOTREACHED */ 477 } 478 479 /* 480 * hardware related system variables. 481 */ 482 int 483 hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 484 int *name; 485 u_int namelen; 486 void *oldp; 487 size_t *oldlenp; 488 void *newp; 489 size_t newlen; 490 struct proc *p; 491 { 492 493 /* all sysctl names at this level are terminal */ 494 if (namelen != 1) 495 return (ENOTDIR); /* overloaded */ 496 497 switch (name[0]) { 498 case HW_MACHINE: 499 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 500 case HW_MACHINE_ARCH: 501 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 502 case HW_MODEL: 503 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 504 case HW_NCPU: 505 return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */ 506 case HW_BYTEORDER: 507 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 508 case HW_PHYSMEM: 509 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 510 case HW_USERMEM: 511 return (sysctl_rdint(oldp, oldlenp, newp, 512 ctob(physmem - uvmexp.wired))); 513 case HW_PAGESIZE: 514 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 515 case HW_ALIGNBYTES: 516 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 517 default: 518 return (EOPNOTSUPP); 519 } 520 /* NOTREACHED */ 521 } 522 523 #ifdef DEBUG 524 /* 525 * Debugging related system variables. 526 */ 527 struct ctldebug debug0, debug1, debug2, debug3, debug4; 528 struct ctldebug debug5, debug6, debug7, debug8, debug9; 529 struct ctldebug debug10, debug11, debug12, debug13, debug14; 530 struct ctldebug debug15, debug16, debug17, debug18, debug19; 531 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 532 &debug0, &debug1, &debug2, &debug3, &debug4, 533 &debug5, &debug6, &debug7, &debug8, &debug9, 534 &debug10, &debug11, &debug12, &debug13, &debug14, 535 &debug15, &debug16, &debug17, &debug18, &debug19, 536 }; 537 int 538 debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 539 int *name; 540 u_int namelen; 541 void *oldp; 542 size_t *oldlenp; 543 void *newp; 544 size_t newlen; 545 struct proc *p; 546 { 547 struct ctldebug *cdp; 548 549 /* all sysctl names at this level are name and field */ 550 if (namelen != 2) 551 return (ENOTDIR); /* overloaded */ 552 cdp = debugvars[name[0]]; 553 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 554 return (EOPNOTSUPP); 555 switch (name[1]) { 556 case CTL_DEBUG_NAME: 557 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 558 case CTL_DEBUG_VALUE: 559 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 560 default: 561 return (EOPNOTSUPP); 562 } 563 /* NOTREACHED */ 564 } 565 #endif /* DEBUG */ 566 567 int 568 proc_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 569 int *name; 570 u_int namelen; 571 void *oldp; 572 size_t *oldlenp; 573 void *newp; 574 size_t newlen; 575 struct proc *p; 576 { 577 struct proc *ptmp = NULL; 578 int error = 0; 579 struct rlimit alim; 580 struct plimit *newplim; 581 char *tmps = NULL; 582 int i, curlen, len; 583 584 if (namelen < 2) 585 return EINVAL; 586 587 if (name[0] == PROC_CURPROC) { 588 ptmp = p; 589 } else if ((ptmp = pfind((pid_t)name[0])) == NULL) { 590 return (ESRCH); 591 } else { 592 if (p->p_ucred->cr_uid != 0) { 593 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 594 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 595 return EPERM; 596 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 597 return EPERM; /* sgid proc */ 598 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 599 if (p->p_ucred->cr_groups[i] == 600 ptmp->p_cred->p_rgid) 601 break; 602 } 603 if (i == p->p_ucred->cr_ngroups) 604 return EPERM; 605 } 606 } 607 if (name[1] == PROC_PID_CORENAME) { 608 if (namelen != 2) 609 return EINVAL; 610 /* 611 * Can't use sysctl_string() here because we may malloc a new 612 * area during the process, so we have to do it by hand. 613 */ 614 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 615 if (oldlenp && *oldlenp < curlen) { 616 if (!oldp) 617 *oldlenp = curlen; 618 return (ENOMEM); 619 } 620 if (newp) { 621 if (securelevel > 2) 622 return EPERM; 623 if (newlen > MAXPATHLEN) 624 return ENAMETOOLONG; 625 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 626 if (tmps == NULL) 627 return ENOMEM; 628 error = copyin(newp, tmps, newlen + 1); 629 tmps[newlen] = '\0'; 630 if (error) 631 goto cleanup; 632 /* Enforce to be either 'core' for end with '.core' */ 633 if (newlen < 4) { /* c.o.r.e */ 634 error = EINVAL; 635 goto cleanup; 636 } 637 len = newlen - 4; 638 if (len > 0) { 639 if (tmps[len - 1] != '.' && 640 tmps[len - 1] != '/') { 641 error = EINVAL; 642 goto cleanup; 643 } 644 } 645 if (strcmp(&tmps[len], "core") != 0) { 646 error = EINVAL; 647 goto cleanup; 648 } 649 } 650 if (oldp && oldlenp) { 651 *oldlenp = curlen; 652 error = copyout(ptmp->p_limit->pl_corename, oldp, 653 curlen); 654 } 655 if (newp && error == 0) { 656 /* if the 2 strings are identical, don't limcopy() */ 657 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 658 error = 0; 659 goto cleanup; 660 } 661 if (ptmp->p_limit->p_refcnt > 1 && 662 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 663 newplim = limcopy(ptmp->p_limit); 664 limfree(ptmp->p_limit); 665 ptmp->p_limit = newplim; 666 } 667 if (ptmp->p_limit->pl_corename != defcorename) { 668 free(ptmp->p_limit->pl_corename, M_TEMP); 669 } 670 ptmp->p_limit->pl_corename = tmps; 671 return (0); 672 } 673 cleanup: 674 if (tmps) 675 free(tmps, M_TEMP); 676 return (error); 677 } 678 if (name[1] == PROC_PID_LIMIT) { 679 if (namelen != 4 || name[2] < 1 || 680 name[2] >= PROC_PID_LIMIT_MAXID) 681 return EINVAL; 682 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 683 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 684 error = sysctl_quad(oldp, oldlenp, newp, newlen, 685 &alim.rlim_max); 686 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 687 error = sysctl_quad(oldp, oldlenp, newp, newlen, 688 &alim.rlim_cur); 689 else 690 error = EINVAL; 691 692 if (error) 693 return error; 694 695 if (newp) 696 error = dosetrlimit(ptmp, p->p_cred, 697 name[2] - 1, &alim); 698 return error; 699 } 700 return (EINVAL); 701 } 702 703 /* 704 * Convenience macros. 705 */ 706 707 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 708 if (oldlenp) { \ 709 if (!oldp) \ 710 *oldlenp = len; \ 711 else { \ 712 if (*oldlenp < len) \ 713 return(ENOMEM); \ 714 *oldlenp = len; \ 715 error = copyout((caddr_t)valp, oldp, len); \ 716 } \ 717 } 718 719 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 720 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 721 722 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 723 if (newp && newlen != len) \ 724 return (EINVAL); 725 726 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 727 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 728 729 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 730 if (error == 0 && newp) \ 731 error = copyin(newp, valp, len); 732 733 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 734 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 735 736 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 737 if (oldlenp) { \ 738 len = strlen(str) + 1; \ 739 if (!oldp) \ 740 *oldlenp = len; \ 741 else { \ 742 if (*oldlenp < len) { \ 743 err2 = ENOMEM; \ 744 len = *oldlenp; \ 745 } else \ 746 *oldlenp = len; \ 747 error = copyout(str, oldp, len);\ 748 if (error == 0) \ 749 error = err2; \ 750 } \ 751 } 752 753 /* 754 * Validate parameters and get old / set new parameters 755 * for an integer-valued sysctl function. 756 */ 757 int 758 sysctl_int(oldp, oldlenp, newp, newlen, valp) 759 void *oldp; 760 size_t *oldlenp; 761 void *newp; 762 size_t newlen; 763 int *valp; 764 { 765 int error = 0; 766 767 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 768 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 769 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 770 771 return (error); 772 } 773 774 775 /* 776 * As above, but read-only. 777 */ 778 int 779 sysctl_rdint(oldp, oldlenp, newp, val) 780 void *oldp; 781 size_t *oldlenp; 782 void *newp; 783 int val; 784 { 785 int error = 0; 786 787 if (newp) 788 return (EPERM); 789 790 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 791 792 return (error); 793 } 794 795 /* 796 * Validate parameters and get old / set new parameters 797 * for an quad-valued sysctl function. 798 */ 799 int 800 sysctl_quad(oldp, oldlenp, newp, newlen, valp) 801 void *oldp; 802 size_t *oldlenp; 803 void *newp; 804 size_t newlen; 805 quad_t *valp; 806 { 807 int error = 0; 808 809 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 810 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 811 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 812 813 return (error); 814 } 815 816 /* 817 * As above, but read-only. 818 */ 819 int 820 sysctl_rdquad(oldp, oldlenp, newp, val) 821 void *oldp; 822 size_t *oldlenp; 823 void *newp; 824 quad_t val; 825 { 826 int error = 0; 827 828 if (newp) 829 return (EPERM); 830 831 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 832 833 return (error); 834 } 835 836 /* 837 * Validate parameters and get old / set new parameters 838 * for a string-valued sysctl function. 839 */ 840 int 841 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 842 void *oldp; 843 size_t *oldlenp; 844 void *newp; 845 size_t newlen; 846 char *str; 847 int maxlen; 848 { 849 int len, error = 0, err2 = 0; 850 851 if (newp && newlen >= maxlen) 852 return (EINVAL); 853 854 SYSCTL_STRING_CORE(oldp, oldlenp, str); 855 856 if (error == 0 && newp) { 857 error = copyin(newp, str, newlen); 858 str[newlen] = 0; 859 } 860 return (error); 861 } 862 863 /* 864 * As above, but read-only. 865 */ 866 int 867 sysctl_rdstring(oldp, oldlenp, newp, str) 868 void *oldp; 869 size_t *oldlenp; 870 void *newp; 871 const char *str; 872 { 873 int len, error = 0, err2 = 0; 874 875 if (newp) 876 return (EPERM); 877 878 SYSCTL_STRING_CORE(oldp, oldlenp, str); 879 880 return (error); 881 } 882 883 /* 884 * Validate parameters and get old / set new parameters 885 * for a structure oriented sysctl function. 886 */ 887 int 888 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 889 void *oldp; 890 size_t *oldlenp; 891 void *newp; 892 size_t newlen; 893 void *sp; 894 int len; 895 { 896 int error = 0; 897 898 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 899 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 900 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 901 902 return (error); 903 } 904 905 /* 906 * Validate parameters and get old parameters 907 * for a structure oriented sysctl function. 908 */ 909 int 910 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 911 void *oldp; 912 size_t *oldlenp; 913 void *newp; 914 const void *sp; 915 int len; 916 { 917 int error = 0; 918 919 if (newp) 920 return (EPERM); 921 922 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 923 924 return (error); 925 } 926 927 /* 928 * Get file structures. 929 */ 930 static int 931 sysctl_file(vwhere, sizep) 932 void *vwhere; 933 size_t *sizep; 934 { 935 int buflen, error; 936 struct file *fp; 937 char *start, *where; 938 939 start = where = vwhere; 940 buflen = *sizep; 941 if (where == NULL) { 942 /* 943 * overestimate by 10 files 944 */ 945 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 946 return (0); 947 } 948 949 /* 950 * first copyout filehead 951 */ 952 if (buflen < sizeof(filehead)) { 953 *sizep = 0; 954 return (0); 955 } 956 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 957 if (error) 958 return (error); 959 buflen -= sizeof(filehead); 960 where += sizeof(filehead); 961 962 /* 963 * followed by an array of file structures 964 */ 965 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 966 if (buflen < sizeof(struct file)) { 967 *sizep = where - start; 968 return (ENOMEM); 969 } 970 error = copyout((caddr_t)fp, where, sizeof(struct file)); 971 if (error) 972 return (error); 973 buflen -= sizeof(struct file); 974 where += sizeof(struct file); 975 } 976 *sizep = where - start; 977 return (0); 978 } 979 980 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 981 #define FILL_PERM(src, dst) do { \ 982 (dst)._key = (src)._key; \ 983 (dst).uid = (src).uid; \ 984 (dst).gid = (src).gid; \ 985 (dst).cuid = (src).cuid; \ 986 (dst).cgid = (src).cgid; \ 987 (dst).mode = (src).mode; \ 988 (dst)._seq = (src)._seq; \ 989 } while (0); 990 #define FILL_MSG(src, dst) do { \ 991 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 992 (dst).msg_qnum = (src).msg_qnum; \ 993 (dst).msg_qbytes = (src).msg_qbytes; \ 994 (dst)._msg_cbytes = (src)._msg_cbytes; \ 995 (dst).msg_lspid = (src).msg_lspid; \ 996 (dst).msg_lrpid = (src).msg_lrpid; \ 997 (dst).msg_stime = (src).msg_stime; \ 998 (dst).msg_rtime = (src).msg_rtime; \ 999 (dst).msg_ctime = (src).msg_ctime; \ 1000 } while (0) 1001 #define FILL_SEM(src, dst) do { \ 1002 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1003 (dst).sem_nsems = (src).sem_nsems; \ 1004 (dst).sem_otime = (src).sem_otime; \ 1005 (dst).sem_ctime = (src).sem_ctime; \ 1006 } while (0) 1007 #define FILL_SHM(src, dst) do { \ 1008 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1009 (dst).shm_segsz = (src).shm_segsz; \ 1010 (dst).shm_lpid = (src).shm_lpid; \ 1011 (dst).shm_cpid = (src).shm_cpid; \ 1012 (dst).shm_atime = (src).shm_atime; \ 1013 (dst).shm_dtime = (src).shm_dtime; \ 1014 (dst).shm_ctime = (src).shm_ctime; \ 1015 (dst).shm_nattch = (src).shm_nattch; \ 1016 } while (0) 1017 1018 static int 1019 sysctl_sysvipc(name, namelen, where, sizep) 1020 int *name; 1021 u_int namelen; 1022 void *where; 1023 size_t *sizep; 1024 { 1025 #ifdef SYSVMSG 1026 struct msg_sysctl_info *msgsi; 1027 #endif 1028 #ifdef SYSVSEM 1029 struct sem_sysctl_info *semsi; 1030 #endif 1031 #ifdef SYSVSHM 1032 struct shm_sysctl_info *shmsi; 1033 #endif 1034 size_t infosize, dssize, tsize, buflen; 1035 void *buf = NULL, *buf2; 1036 char *start; 1037 int32_t nds; 1038 int i, error, ret; 1039 1040 if (namelen != 1) 1041 return (EINVAL); 1042 1043 start = where; 1044 buflen = *sizep; 1045 1046 switch (*name) { 1047 case KERN_SYSVIPC_MSG_INFO: 1048 #ifdef SYSVMSG 1049 infosize = sizeof(msgsi->msginfo); 1050 nds = msginfo.msgmni; 1051 dssize = sizeof(msgsi->msgids[0]); 1052 break; 1053 #else 1054 return (EINVAL); 1055 #endif 1056 case KERN_SYSVIPC_SEM_INFO: 1057 #ifdef SYSVSEM 1058 infosize = sizeof(semsi->seminfo); 1059 nds = seminfo.semmni; 1060 dssize = sizeof(semsi->semids[0]); 1061 break; 1062 #else 1063 return (EINVAL); 1064 #endif 1065 case KERN_SYSVIPC_SHM_INFO: 1066 #ifdef SYSVSHM 1067 infosize = sizeof(shmsi->shminfo); 1068 nds = shminfo.shmmni; 1069 dssize = sizeof(shmsi->shmids[0]); 1070 break; 1071 #else 1072 return (EINVAL); 1073 #endif 1074 default: 1075 return (EINVAL); 1076 } 1077 /* 1078 * Round infosize to 64 bit boundary if requesting more than just 1079 * the info structure or getting the total data size. 1080 */ 1081 if (where == NULL || *sizep > infosize) 1082 infosize = ((infosize + 7) / 8) * 8; 1083 tsize = infosize + nds * dssize; 1084 1085 /* Return just the total size required. */ 1086 if (where == NULL) { 1087 *sizep = tsize; 1088 return (0); 1089 } 1090 1091 /* Not enough room for even the info struct. */ 1092 if (buflen < infosize) { 1093 *sizep = 0; 1094 return (ENOMEM); 1095 } 1096 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1097 memset(buf, 0, min(tsize, buflen)); 1098 1099 switch (*name) { 1100 #ifdef SYSVMSG 1101 case KERN_SYSVIPC_MSG_INFO: 1102 msgsi = (struct msg_sysctl_info *)buf; 1103 buf2 = &msgsi->msgids[0]; 1104 msgsi->msginfo = msginfo; 1105 break; 1106 #endif 1107 #ifdef SYSVSEM 1108 case KERN_SYSVIPC_SEM_INFO: 1109 semsi = (struct sem_sysctl_info *)buf; 1110 buf2 = &semsi->semids[0]; 1111 semsi->seminfo = seminfo; 1112 break; 1113 #endif 1114 #ifdef SYSVSHM 1115 case KERN_SYSVIPC_SHM_INFO: 1116 shmsi = (struct shm_sysctl_info *)buf; 1117 buf2 = &shmsi->shmids[0]; 1118 shmsi->shminfo = shminfo; 1119 break; 1120 #endif 1121 } 1122 buflen -= infosize; 1123 1124 ret = 0; 1125 if (buflen > 0) { 1126 /* Fill in the IPC data structures. */ 1127 for (i = 0; i < nds; i++) { 1128 if (buflen < dssize) { 1129 ret = ENOMEM; 1130 break; 1131 } 1132 switch (*name) { 1133 #ifdef SYSVMSG 1134 case KERN_SYSVIPC_MSG_INFO: 1135 FILL_MSG(msqids[i], msgsi->msgids[i]); 1136 break; 1137 #endif 1138 #ifdef SYSVSEM 1139 case KERN_SYSVIPC_SEM_INFO: 1140 FILL_SEM(sema[i], semsi->semids[i]); 1141 break; 1142 #endif 1143 #ifdef SYSVSHM 1144 case KERN_SYSVIPC_SHM_INFO: 1145 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1146 break; 1147 #endif 1148 } 1149 buflen -= dssize; 1150 } 1151 } 1152 *sizep -= buflen; 1153 error = copyout(buf, start, *sizep); 1154 /* If copyout succeeded, use return code set earlier. */ 1155 if (error == 0) 1156 error = ret; 1157 if (buf) 1158 free(buf, M_TEMP); 1159 return (error); 1160 } 1161 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1162 1163 static int 1164 sysctl_msgbuf(vwhere, sizep) 1165 void *vwhere; 1166 size_t *sizep; 1167 { 1168 char *where = vwhere; 1169 size_t len, maxlen = *sizep; 1170 long pos; 1171 int error; 1172 1173 /* 1174 * deal with cases where the message buffer has 1175 * become corrupted. 1176 */ 1177 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1178 msgbufenabled = 0; 1179 return (ENXIO); 1180 } 1181 1182 if (where == NULL) { 1183 /* always return full buffer size */ 1184 *sizep = msgbufp->msg_bufs; 1185 return (0); 1186 } 1187 1188 error = 0; 1189 maxlen = min(msgbufp->msg_bufs, maxlen); 1190 pos = msgbufp->msg_bufx; 1191 while (maxlen > 0) { 1192 len = pos == 0 ? msgbufp->msg_bufx : msgbufp->msg_bufs - msgbufp->msg_bufx; 1193 len = min(len, maxlen); 1194 if (len == 0) 1195 break; 1196 error = copyout(&msgbufp->msg_bufc[pos], where, len); 1197 if (error) 1198 break; 1199 where += len; 1200 maxlen -= len; 1201 pos = 0; 1202 } 1203 return (error); 1204 } 1205 1206 /* 1207 * try over estimating by 5 procs 1208 */ 1209 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1210 1211 static int 1212 sysctl_doeproc(name, namelen, vwhere, sizep) 1213 int *name; 1214 u_int namelen; 1215 void *vwhere; 1216 size_t *sizep; 1217 { 1218 struct eproc eproc; 1219 struct kinfo_proc2 kproc2; 1220 struct kinfo_proc *dp; 1221 struct proc *p; 1222 const struct proclist_desc *pd; 1223 char *where, *dp2; 1224 int type, op, arg, elem_size, elem_count; 1225 int buflen, needed, error; 1226 1227 dp = vwhere; 1228 dp2 = where = vwhere; 1229 buflen = where != NULL ? *sizep : 0; 1230 error = needed = 0; 1231 type = name[0]; 1232 1233 if (type == KERN_PROC) { 1234 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1235 return (EINVAL); 1236 op = name[1]; 1237 if (op != KERN_PROC_ALL) 1238 arg = name[2]; 1239 } else { 1240 if (namelen != 5) 1241 return (EINVAL); 1242 op = name[1]; 1243 arg = name[2]; 1244 elem_size = name[3]; 1245 elem_count = name[4]; 1246 } 1247 1248 proclist_lock_read(); 1249 1250 pd = proclists; 1251 again: 1252 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1253 /* 1254 * Skip embryonic processes. 1255 */ 1256 if (p->p_stat == SIDL) 1257 continue; 1258 /* 1259 * TODO - make more efficient (see notes below). 1260 * do by session. 1261 */ 1262 switch (op) { 1263 1264 case KERN_PROC_PID: 1265 /* could do this with just a lookup */ 1266 if (p->p_pid != (pid_t)arg) 1267 continue; 1268 break; 1269 1270 case KERN_PROC_PGRP: 1271 /* could do this by traversing pgrp */ 1272 if (p->p_pgrp->pg_id != (pid_t)arg) 1273 continue; 1274 break; 1275 1276 case KERN_PROC_SESSION: 1277 if (p->p_session->s_sid != (pid_t)arg) 1278 continue; 1279 break; 1280 1281 case KERN_PROC_TTY: 1282 if (arg == KERN_PROC_TTY_REVOKE) { 1283 if ((p->p_flag & P_CONTROLT) == 0 || 1284 p->p_session->s_ttyp == NULL || 1285 p->p_session->s_ttyvp != NULL) 1286 continue; 1287 } else if ((p->p_flag & P_CONTROLT) == 0 || 1288 p->p_session->s_ttyp == NULL) { 1289 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1290 continue; 1291 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1292 continue; 1293 break; 1294 1295 case KERN_PROC_UID: 1296 if (p->p_ucred->cr_uid != (uid_t)arg) 1297 continue; 1298 break; 1299 1300 case KERN_PROC_RUID: 1301 if (p->p_cred->p_ruid != (uid_t)arg) 1302 continue; 1303 break; 1304 1305 case KERN_PROC_GID: 1306 if (p->p_ucred->cr_gid != (uid_t)arg) 1307 continue; 1308 break; 1309 1310 case KERN_PROC_RGID: 1311 if (p->p_cred->p_rgid != (uid_t)arg) 1312 continue; 1313 break; 1314 1315 case KERN_PROC_ALL: 1316 /* allow everything */ 1317 break; 1318 1319 default: 1320 error = EINVAL; 1321 goto cleanup; 1322 } 1323 if (type == KERN_PROC) { 1324 if (buflen >= sizeof(struct kinfo_proc)) { 1325 fill_eproc(p, &eproc); 1326 error = copyout((caddr_t)p, &dp->kp_proc, 1327 sizeof(struct proc)); 1328 if (error) 1329 goto cleanup; 1330 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1331 sizeof(eproc)); 1332 if (error) 1333 goto cleanup; 1334 dp++; 1335 buflen -= sizeof(struct kinfo_proc); 1336 } 1337 needed += sizeof(struct kinfo_proc); 1338 } else { /* KERN_PROC2 */ 1339 if (buflen >= elem_size && elem_count > 0) { 1340 fill_kproc2(p, &kproc2); 1341 /* 1342 * Copy out elem_size, but not larger than 1343 * the size of a struct kinfo_proc2. 1344 */ 1345 error = copyout(&kproc2, dp2, 1346 min(sizeof(kproc2), elem_size)); 1347 if (error) 1348 goto cleanup; 1349 dp2 += elem_size; 1350 buflen -= elem_size; 1351 elem_count--; 1352 } 1353 needed += elem_size; 1354 } 1355 } 1356 pd++; 1357 if (pd->pd_list != NULL) 1358 goto again; 1359 proclist_unlock_read(); 1360 1361 if (where != NULL) { 1362 if (type == KERN_PROC) 1363 *sizep = (caddr_t)dp - where; 1364 else 1365 *sizep = dp2 - where; 1366 if (needed > *sizep) 1367 return (ENOMEM); 1368 } else { 1369 needed += KERN_PROCSLOP; 1370 *sizep = needed; 1371 } 1372 return (0); 1373 cleanup: 1374 proclist_unlock_read(); 1375 return (error); 1376 } 1377 1378 /* 1379 * Fill in an eproc structure for the specified process. 1380 */ 1381 void 1382 fill_eproc(p, ep) 1383 struct proc *p; 1384 struct eproc *ep; 1385 { 1386 struct tty *tp; 1387 1388 ep->e_paddr = p; 1389 ep->e_sess = p->p_session; 1390 ep->e_pcred = *p->p_cred; 1391 ep->e_ucred = *p->p_ucred; 1392 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1393 ep->e_vm.vm_rssize = 0; 1394 ep->e_vm.vm_tsize = 0; 1395 ep->e_vm.vm_dsize = 0; 1396 ep->e_vm.vm_ssize = 0; 1397 /* ep->e_vm.vm_pmap = XXX; */ 1398 } else { 1399 struct vmspace *vm = p->p_vmspace; 1400 1401 ep->e_vm.vm_rssize = vm_resident_count(vm); 1402 ep->e_vm.vm_tsize = vm->vm_tsize; 1403 ep->e_vm.vm_dsize = vm->vm_dsize; 1404 ep->e_vm.vm_ssize = vm->vm_ssize; 1405 } 1406 if (p->p_pptr) 1407 ep->e_ppid = p->p_pptr->p_pid; 1408 else 1409 ep->e_ppid = 0; 1410 ep->e_pgid = p->p_pgrp->pg_id; 1411 ep->e_sid = ep->e_sess->s_sid; 1412 ep->e_jobc = p->p_pgrp->pg_jobc; 1413 if ((p->p_flag & P_CONTROLT) && 1414 (tp = ep->e_sess->s_ttyp)) { 1415 ep->e_tdev = tp->t_dev; 1416 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1417 ep->e_tsess = tp->t_session; 1418 } else 1419 ep->e_tdev = NODEV; 1420 if (p->p_wmesg) 1421 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1422 ep->e_xsize = ep->e_xrssize = 0; 1423 ep->e_xccount = ep->e_xswrss = 0; 1424 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1425 if (SESS_LEADER(p)) 1426 ep->e_flag |= EPROC_SLEADER; 1427 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1428 } 1429 1430 /* 1431 * Fill in an eproc structure for the specified process. 1432 */ 1433 static void 1434 fill_kproc2(p, ki) 1435 struct proc *p; 1436 struct kinfo_proc2 *ki; 1437 { 1438 struct tty *tp; 1439 1440 memset(ki, 0, sizeof(*ki)); 1441 1442 ki->p_forw = PTRTOINT64(p->p_forw); 1443 ki->p_back = PTRTOINT64(p->p_back); 1444 ki->p_paddr = PTRTOINT64(p); 1445 1446 ki->p_addr = PTRTOINT64(p->p_addr); 1447 ki->p_fd = PTRTOINT64(p->p_fd); 1448 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1449 ki->p_stats = PTRTOINT64(p->p_stats); 1450 ki->p_limit = PTRTOINT64(p->p_limit); 1451 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1452 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1453 ki->p_sess = PTRTOINT64(p->p_session); 1454 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1455 ki->p_ru = PTRTOINT64(p->p_ru); 1456 1457 ki->p_eflag = 0; 1458 ki->p_exitsig = p->p_exitsig; 1459 ki->p_flag = p->p_flag; 1460 1461 ki->p_pid = p->p_pid; 1462 if (p->p_pptr) 1463 ki->p_ppid = p->p_pptr->p_pid; 1464 else 1465 ki->p_ppid = 0; 1466 ki->p_sid = p->p_session->s_sid; 1467 ki->p__pgid = p->p_pgrp->pg_id; 1468 1469 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1470 1471 ki->p_uid = p->p_ucred->cr_uid; 1472 ki->p_ruid = p->p_cred->p_ruid; 1473 ki->p_gid = p->p_ucred->cr_gid; 1474 ki->p_rgid = p->p_cred->p_rgid; 1475 1476 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1477 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1478 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1479 1480 ki->p_jobc = p->p_pgrp->pg_jobc; 1481 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1482 ki->p_tdev = tp->t_dev; 1483 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1484 ki->p_tsess = PTRTOINT64(tp->t_session); 1485 } else { 1486 ki->p_tdev = NODEV; 1487 } 1488 1489 ki->p_estcpu = p->p_estcpu; 1490 ki->p_rtime_sec = p->p_rtime.tv_sec; 1491 ki->p_rtime_usec = p->p_rtime.tv_usec; 1492 ki->p_cpticks = p->p_cpticks; 1493 ki->p_pctcpu = p->p_pctcpu; 1494 ki->p_swtime = p->p_swtime; 1495 ki->p_slptime = p->p_slptime; 1496 if (p->p_stat == SONPROC) { 1497 KDASSERT(p->p_cpu != NULL); 1498 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1499 } else 1500 ki->p_schedflags = 0; 1501 1502 ki->p_uticks = p->p_uticks; 1503 ki->p_sticks = p->p_sticks; 1504 ki->p_iticks = p->p_iticks; 1505 1506 ki->p_tracep = PTRTOINT64(p->p_tracep); 1507 ki->p_traceflag = p->p_traceflag; 1508 1509 ki->p_holdcnt = p->p_holdcnt; 1510 1511 memcpy(&ki->p_siglist, &p->p_siglist, sizeof(ki_sigset_t)); 1512 memcpy(&ki->p_sigmask, &p->p_sigmask, sizeof(ki_sigset_t)); 1513 memcpy(&ki->p_sigignore, &p->p_sigignore, sizeof(ki_sigset_t)); 1514 memcpy(&ki->p_sigcatch, &p->p_sigcatch, sizeof(ki_sigset_t)); 1515 1516 ki->p_stat = p->p_stat; 1517 ki->p_priority = p->p_priority; 1518 ki->p_usrpri = p->p_usrpri; 1519 ki->p_nice = p->p_nice; 1520 1521 ki->p_xstat = p->p_xstat; 1522 ki->p_acflag = p->p_acflag; 1523 1524 strncpy(ki->p_comm, p->p_comm, 1525 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1526 1527 if (p->p_wmesg) 1528 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1529 ki->p_wchan = PTRTOINT64(p->p_wchan); 1530 1531 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1532 1533 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1534 ki->p_vm_rssize = 0; 1535 ki->p_vm_tsize = 0; 1536 ki->p_vm_dsize = 0; 1537 ki->p_vm_ssize = 0; 1538 } else { 1539 struct vmspace *vm = p->p_vmspace; 1540 1541 ki->p_vm_rssize = vm_resident_count(vm); 1542 ki->p_vm_tsize = vm->vm_tsize; 1543 ki->p_vm_dsize = vm->vm_dsize; 1544 ki->p_vm_ssize = vm->vm_ssize; 1545 } 1546 1547 if (p->p_session->s_ttyvp) 1548 ki->p_eflag |= EPROC_CTTY; 1549 if (SESS_LEADER(p)) 1550 ki->p_eflag |= EPROC_SLEADER; 1551 1552 /* XXX Is this double check necessary? */ 1553 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1554 ki->p_uvalid = 0; 1555 } else { 1556 ki->p_uvalid = 1; 1557 1558 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1559 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1560 1561 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1562 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1563 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1564 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1565 1566 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1567 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1568 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1569 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1570 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1571 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1572 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1573 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1574 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1575 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1576 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1577 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1578 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1579 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1580 1581 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1582 p->p_stats->p_cru.ru_stime.tv_sec; 1583 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1584 p->p_stats->p_cru.ru_stime.tv_usec; 1585 } 1586 } 1587 1588 int 1589 sysctl_procargs(name, namelen, where, sizep, up) 1590 int *name; 1591 u_int namelen; 1592 void *where; 1593 size_t *sizep; 1594 struct proc *up; 1595 { 1596 struct ps_strings pss; 1597 struct proc *p; 1598 size_t len, upper_bound, xlen; 1599 struct uio auio; 1600 struct iovec aiov; 1601 vaddr_t argv; 1602 pid_t pid; 1603 int nargv, type, error, i; 1604 char *arg; 1605 char *tmp; 1606 1607 if (namelen != 2) 1608 return (EINVAL); 1609 pid = name[0]; 1610 type = name[1]; 1611 1612 switch (type) { 1613 case KERN_PROC_ARGV: 1614 case KERN_PROC_NARGV: 1615 case KERN_PROC_ENV: 1616 case KERN_PROC_NENV: 1617 /* ok */ 1618 break; 1619 default: 1620 return (EINVAL); 1621 } 1622 1623 /* check pid */ 1624 if ((p = pfind(pid)) == NULL) 1625 return (EINVAL); 1626 1627 /* only root or same user change look at the environment */ 1628 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1629 if (up->p_ucred->cr_uid != 0) { 1630 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1631 up->p_cred->p_ruid != p->p_cred->p_svuid) 1632 return (EPERM); 1633 } 1634 } 1635 1636 if (sizep != NULL && where == NULL) { 1637 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1638 *sizep = sizeof (int); 1639 else 1640 *sizep = ARG_MAX; /* XXX XXX XXX */ 1641 return (0); 1642 } 1643 if (where == NULL || sizep == NULL) 1644 return (EINVAL); 1645 1646 /* 1647 * Zombies don't have a stack, so we can't read their psstrings. 1648 * System processes also don't have a user stack. 1649 */ 1650 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1651 return (EINVAL); 1652 1653 /* 1654 * Lock the process down in memory. 1655 */ 1656 /* XXXCDC: how should locking work here? */ 1657 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1658 return (EFAULT); 1659 PHOLD(p); 1660 p->p_vmspace->vm_refcnt++; /* XXX */ 1661 1662 /* 1663 * Allocate a temporary buffer to hold the arguments. 1664 */ 1665 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1666 1667 /* 1668 * Read in the ps_strings structure. 1669 */ 1670 aiov.iov_base = &pss; 1671 aiov.iov_len = sizeof(pss); 1672 auio.uio_iov = &aiov; 1673 auio.uio_iovcnt = 1; 1674 auio.uio_offset = (vaddr_t)p->p_psstr; 1675 auio.uio_resid = sizeof(pss); 1676 auio.uio_segflg = UIO_SYSSPACE; 1677 auio.uio_rw = UIO_READ; 1678 auio.uio_procp = NULL; 1679 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1680 if (error) 1681 goto done; 1682 1683 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1684 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1685 else 1686 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1687 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1688 error = copyout(&nargv, where, sizeof(nargv)); 1689 *sizep = sizeof(nargv); 1690 goto done; 1691 } 1692 /* 1693 * Now read the address of the argument vector. 1694 */ 1695 switch (type) { 1696 case KERN_PROC_ARGV: 1697 /* XXX compat32 stuff here */ 1698 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1699 break; 1700 case KERN_PROC_ENV: 1701 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1702 break; 1703 default: 1704 return (EINVAL); 1705 } 1706 auio.uio_offset = (off_t)(long)tmp; 1707 aiov.iov_base = &argv; 1708 aiov.iov_len = sizeof(argv); 1709 auio.uio_iov = &aiov; 1710 auio.uio_iovcnt = 1; 1711 auio.uio_resid = sizeof(argv); 1712 auio.uio_segflg = UIO_SYSSPACE; 1713 auio.uio_rw = UIO_READ; 1714 auio.uio_procp = NULL; 1715 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1716 if (error) 1717 goto done; 1718 1719 /* 1720 * Now copy in the actual argument vector, one page at a time, 1721 * since we don't know how long the vector is (though, we do 1722 * know how many NUL-terminated strings are in the vector). 1723 */ 1724 len = 0; 1725 upper_bound = *sizep; 1726 for (; nargv != 0 && len < upper_bound; len += xlen) { 1727 aiov.iov_base = arg; 1728 aiov.iov_len = PAGE_SIZE; 1729 auio.uio_iov = &aiov; 1730 auio.uio_iovcnt = 1; 1731 auio.uio_offset = argv + len; 1732 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1733 auio.uio_resid = xlen; 1734 auio.uio_segflg = UIO_SYSSPACE; 1735 auio.uio_rw = UIO_READ; 1736 auio.uio_procp = NULL; 1737 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1738 if (error) 1739 goto done; 1740 1741 for (i = 0; i < xlen && nargv != 0; i++) { 1742 if (arg[i] == '\0') 1743 nargv--; /* one full string */ 1744 } 1745 1746 /* make sure we don't copyout past the end of the user's buffer */ 1747 if (len + i > upper_bound) 1748 i = upper_bound - len; 1749 1750 error = copyout(arg, (char *)where + len, i); 1751 if (error) 1752 break; 1753 1754 if (nargv == 0) { 1755 len += i; 1756 break; 1757 } 1758 } 1759 *sizep = len; 1760 1761 done: 1762 PRELE(p); 1763 uvmspace_free(p->p_vmspace); 1764 1765 free(arg, M_TEMP); 1766 return (error); 1767 } 1768
Indexes created Tue Sep 30 07:10:03 GMT 2025