kern_sysctl.c revision 1.73.2.8
1 /* $NetBSD: kern_sysctl.c,v 1.73.2.8 2003/10/08 08:23:41 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 if (name[0] < 0 || name[0] >= CTL_DEBUG_MAXID) 553 return (EOPNOTSUPP); 554 cdp = debugvars[name[0]]; 555 if (cdp->debugname == 0) 556 return (EOPNOTSUPP); 557 switch (name[1]) { 558 case CTL_DEBUG_NAME: 559 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 560 case CTL_DEBUG_VALUE: 561 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 562 default: 563 return (EOPNOTSUPP); 564 } 565 /* NOTREACHED */ 566 } 567 #endif /* DEBUG */ 568 569 int 570 proc_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 571 int *name; 572 u_int namelen; 573 void *oldp; 574 size_t *oldlenp; 575 void *newp; 576 size_t newlen; 577 struct proc *p; 578 { 579 struct proc *ptmp = NULL; 580 int error = 0; 581 struct rlimit alim; 582 struct plimit *newplim; 583 char *tmps = NULL; 584 int i, curlen, len; 585 586 if (namelen < 2) 587 return EINVAL; 588 589 if (name[0] == PROC_CURPROC) { 590 ptmp = p; 591 } else if ((ptmp = pfind((pid_t)name[0])) == NULL) { 592 return (ESRCH); 593 } else { 594 if (p->p_ucred->cr_uid != 0) { 595 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 596 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 597 return EPERM; 598 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 599 return EPERM; /* sgid proc */ 600 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 601 if (p->p_ucred->cr_groups[i] == 602 ptmp->p_cred->p_rgid) 603 break; 604 } 605 if (i == p->p_ucred->cr_ngroups) 606 return EPERM; 607 } 608 } 609 if (name[1] == PROC_PID_CORENAME) { 610 if (namelen != 2) 611 return EINVAL; 612 /* 613 * Can't use sysctl_string() here because we may malloc a new 614 * area during the process, so we have to do it by hand. 615 */ 616 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 617 if (oldlenp && *oldlenp < curlen) { 618 if (!oldp) 619 *oldlenp = curlen; 620 return (ENOMEM); 621 } 622 if (newp) { 623 if (securelevel > 2) 624 return EPERM; 625 if (newlen > MAXPATHLEN) 626 return ENAMETOOLONG; 627 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 628 if (tmps == NULL) 629 return ENOMEM; 630 error = copyin(newp, tmps, newlen + 1); 631 tmps[newlen] = '\0'; 632 if (error) 633 goto cleanup; 634 /* Enforce to be either 'core' for end with '.core' */ 635 if (newlen < 4) { /* c.o.r.e */ 636 error = EINVAL; 637 goto cleanup; 638 } 639 len = newlen - 4; 640 if (len > 0) { 641 if (tmps[len - 1] != '.' && 642 tmps[len - 1] != '/') { 643 error = EINVAL; 644 goto cleanup; 645 } 646 } 647 if (strcmp(&tmps[len], "core") != 0) { 648 error = EINVAL; 649 goto cleanup; 650 } 651 } 652 if (oldp && oldlenp) { 653 *oldlenp = curlen; 654 error = copyout(ptmp->p_limit->pl_corename, oldp, 655 curlen); 656 } 657 if (newp && error == 0) { 658 /* if the 2 strings are identical, don't limcopy() */ 659 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 660 error = 0; 661 goto cleanup; 662 } 663 if (ptmp->p_limit->p_refcnt > 1 && 664 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 665 newplim = limcopy(ptmp->p_limit); 666 limfree(ptmp->p_limit); 667 ptmp->p_limit = newplim; 668 } 669 if (ptmp->p_limit->pl_corename != defcorename) { 670 free(ptmp->p_limit->pl_corename, M_TEMP); 671 } 672 ptmp->p_limit->pl_corename = tmps; 673 return (0); 674 } 675 cleanup: 676 if (tmps) 677 free(tmps, M_TEMP); 678 return (error); 679 } 680 if (name[1] == PROC_PID_LIMIT) { 681 if (namelen != 4 || name[2] < 1 || 682 name[2] >= PROC_PID_LIMIT_MAXID) 683 return EINVAL; 684 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 685 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 686 error = sysctl_quad(oldp, oldlenp, newp, newlen, 687 &alim.rlim_max); 688 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 689 error = sysctl_quad(oldp, oldlenp, newp, newlen, 690 &alim.rlim_cur); 691 else 692 error = EINVAL; 693 694 if (error) 695 return error; 696 697 if (newp) 698 error = dosetrlimit(ptmp, p->p_cred, 699 name[2] - 1, &alim); 700 return error; 701 } 702 return (EINVAL); 703 } 704 705 /* 706 * Convenience macros. 707 */ 708 709 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 710 if (oldlenp) { \ 711 if (!oldp) \ 712 *oldlenp = len; \ 713 else { \ 714 if (*oldlenp < len) \ 715 return(ENOMEM); \ 716 *oldlenp = len; \ 717 error = copyout((caddr_t)valp, oldp, len); \ 718 } \ 719 } 720 721 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 722 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 723 724 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 725 if (newp && newlen != len) \ 726 return (EINVAL); 727 728 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 729 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 730 731 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 732 if (error == 0 && newp) \ 733 error = copyin(newp, valp, len); 734 735 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 736 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 737 738 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 739 if (oldlenp) { \ 740 len = strlen(str) + 1; \ 741 if (!oldp) \ 742 *oldlenp = len; \ 743 else { \ 744 if (*oldlenp < len) { \ 745 err2 = ENOMEM; \ 746 len = *oldlenp; \ 747 } else \ 748 *oldlenp = len; \ 749 error = copyout(str, oldp, len);\ 750 if (error == 0) \ 751 error = err2; \ 752 } \ 753 } 754 755 /* 756 * Validate parameters and get old / set new parameters 757 * for an integer-valued sysctl function. 758 */ 759 int 760 sysctl_int(oldp, oldlenp, newp, newlen, valp) 761 void *oldp; 762 size_t *oldlenp; 763 void *newp; 764 size_t newlen; 765 int *valp; 766 { 767 int error = 0; 768 769 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 770 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 771 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 772 773 return (error); 774 } 775 776 777 /* 778 * As above, but read-only. 779 */ 780 int 781 sysctl_rdint(oldp, oldlenp, newp, val) 782 void *oldp; 783 size_t *oldlenp; 784 void *newp; 785 int val; 786 { 787 int error = 0; 788 789 if (newp) 790 return (EPERM); 791 792 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 793 794 return (error); 795 } 796 797 /* 798 * Validate parameters and get old / set new parameters 799 * for an quad-valued sysctl function. 800 */ 801 int 802 sysctl_quad(oldp, oldlenp, newp, newlen, valp) 803 void *oldp; 804 size_t *oldlenp; 805 void *newp; 806 size_t newlen; 807 quad_t *valp; 808 { 809 int error = 0; 810 811 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 812 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 813 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 814 815 return (error); 816 } 817 818 /* 819 * As above, but read-only. 820 */ 821 int 822 sysctl_rdquad(oldp, oldlenp, newp, val) 823 void *oldp; 824 size_t *oldlenp; 825 void *newp; 826 quad_t val; 827 { 828 int error = 0; 829 830 if (newp) 831 return (EPERM); 832 833 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 834 835 return (error); 836 } 837 838 /* 839 * Validate parameters and get old / set new parameters 840 * for a string-valued sysctl function. 841 */ 842 int 843 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 844 void *oldp; 845 size_t *oldlenp; 846 void *newp; 847 size_t newlen; 848 char *str; 849 int maxlen; 850 { 851 int len, error = 0, err2 = 0; 852 853 if (newp && newlen >= maxlen) 854 return (EINVAL); 855 856 SYSCTL_STRING_CORE(oldp, oldlenp, str); 857 858 if (error == 0 && newp) { 859 error = copyin(newp, str, newlen); 860 str[newlen] = 0; 861 } 862 return (error); 863 } 864 865 /* 866 * As above, but read-only. 867 */ 868 int 869 sysctl_rdstring(oldp, oldlenp, newp, str) 870 void *oldp; 871 size_t *oldlenp; 872 void *newp; 873 const char *str; 874 { 875 int len, error = 0, err2 = 0; 876 877 if (newp) 878 return (EPERM); 879 880 SYSCTL_STRING_CORE(oldp, oldlenp, str); 881 882 return (error); 883 } 884 885 /* 886 * Validate parameters and get old / set new parameters 887 * for a structure oriented sysctl function. 888 */ 889 int 890 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 891 void *oldp; 892 size_t *oldlenp; 893 void *newp; 894 size_t newlen; 895 void *sp; 896 int len; 897 { 898 int error = 0; 899 900 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 901 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 902 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 903 904 return (error); 905 } 906 907 /* 908 * Validate parameters and get old parameters 909 * for a structure oriented sysctl function. 910 */ 911 int 912 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 913 void *oldp; 914 size_t *oldlenp; 915 void *newp; 916 const void *sp; 917 int len; 918 { 919 int error = 0; 920 921 if (newp) 922 return (EPERM); 923 924 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 925 926 return (error); 927 } 928 929 /* 930 * Get file structures. 931 */ 932 static int 933 sysctl_file(vwhere, sizep) 934 void *vwhere; 935 size_t *sizep; 936 { 937 int buflen, error; 938 struct file *fp; 939 char *start, *where; 940 941 start = where = vwhere; 942 buflen = *sizep; 943 if (where == NULL) { 944 /* 945 * overestimate by 10 files 946 */ 947 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 948 return (0); 949 } 950 951 /* 952 * first copyout filehead 953 */ 954 if (buflen < sizeof(filehead)) { 955 *sizep = 0; 956 return (0); 957 } 958 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 959 if (error) 960 return (error); 961 buflen -= sizeof(filehead); 962 where += sizeof(filehead); 963 964 /* 965 * followed by an array of file structures 966 */ 967 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 968 if (buflen < sizeof(struct file)) { 969 *sizep = where - start; 970 return (ENOMEM); 971 } 972 error = copyout((caddr_t)fp, where, sizeof(struct file)); 973 if (error) 974 return (error); 975 buflen -= sizeof(struct file); 976 where += sizeof(struct file); 977 } 978 *sizep = where - start; 979 return (0); 980 } 981 982 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 983 #define FILL_PERM(src, dst) do { \ 984 (dst)._key = (src)._key; \ 985 (dst).uid = (src).uid; \ 986 (dst).gid = (src).gid; \ 987 (dst).cuid = (src).cuid; \ 988 (dst).cgid = (src).cgid; \ 989 (dst).mode = (src).mode; \ 990 (dst)._seq = (src)._seq; \ 991 } while (0); 992 #define FILL_MSG(src, dst) do { \ 993 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 994 (dst).msg_qnum = (src).msg_qnum; \ 995 (dst).msg_qbytes = (src).msg_qbytes; \ 996 (dst)._msg_cbytes = (src)._msg_cbytes; \ 997 (dst).msg_lspid = (src).msg_lspid; \ 998 (dst).msg_lrpid = (src).msg_lrpid; \ 999 (dst).msg_stime = (src).msg_stime; \ 1000 (dst).msg_rtime = (src).msg_rtime; \ 1001 (dst).msg_ctime = (src).msg_ctime; \ 1002 } while (0) 1003 #define FILL_SEM(src, dst) do { \ 1004 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1005 (dst).sem_nsems = (src).sem_nsems; \ 1006 (dst).sem_otime = (src).sem_otime; \ 1007 (dst).sem_ctime = (src).sem_ctime; \ 1008 } while (0) 1009 #define FILL_SHM(src, dst) do { \ 1010 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1011 (dst).shm_segsz = (src).shm_segsz; \ 1012 (dst).shm_lpid = (src).shm_lpid; \ 1013 (dst).shm_cpid = (src).shm_cpid; \ 1014 (dst).shm_atime = (src).shm_atime; \ 1015 (dst).shm_dtime = (src).shm_dtime; \ 1016 (dst).shm_ctime = (src).shm_ctime; \ 1017 (dst).shm_nattch = (src).shm_nattch; \ 1018 } while (0) 1019 1020 static int 1021 sysctl_sysvipc(name, namelen, where, sizep) 1022 int *name; 1023 u_int namelen; 1024 void *where; 1025 size_t *sizep; 1026 { 1027 #ifdef SYSVMSG 1028 struct msg_sysctl_info *msgsi; 1029 #endif 1030 #ifdef SYSVSEM 1031 struct sem_sysctl_info *semsi; 1032 #endif 1033 #ifdef SYSVSHM 1034 struct shm_sysctl_info *shmsi; 1035 #endif 1036 size_t infosize, dssize, tsize, buflen; 1037 void *buf = NULL, *buf2; 1038 char *start; 1039 int32_t nds; 1040 int i, error, ret; 1041 1042 if (namelen != 1) 1043 return (EINVAL); 1044 1045 start = where; 1046 buflen = *sizep; 1047 1048 switch (*name) { 1049 case KERN_SYSVIPC_MSG_INFO: 1050 #ifdef SYSVMSG 1051 infosize = sizeof(msgsi->msginfo); 1052 nds = msginfo.msgmni; 1053 dssize = sizeof(msgsi->msgids[0]); 1054 break; 1055 #else 1056 return (EINVAL); 1057 #endif 1058 case KERN_SYSVIPC_SEM_INFO: 1059 #ifdef SYSVSEM 1060 infosize = sizeof(semsi->seminfo); 1061 nds = seminfo.semmni; 1062 dssize = sizeof(semsi->semids[0]); 1063 break; 1064 #else 1065 return (EINVAL); 1066 #endif 1067 case KERN_SYSVIPC_SHM_INFO: 1068 #ifdef SYSVSHM 1069 infosize = sizeof(shmsi->shminfo); 1070 nds = shminfo.shmmni; 1071 dssize = sizeof(shmsi->shmids[0]); 1072 break; 1073 #else 1074 return (EINVAL); 1075 #endif 1076 default: 1077 return (EINVAL); 1078 } 1079 /* 1080 * Round infosize to 64 bit boundary if requesting more than just 1081 * the info structure or getting the total data size. 1082 */ 1083 if (where == NULL || *sizep > infosize) 1084 infosize = ((infosize + 7) / 8) * 8; 1085 tsize = infosize + nds * dssize; 1086 1087 /* Return just the total size required. */ 1088 if (where == NULL) { 1089 *sizep = tsize; 1090 return (0); 1091 } 1092 1093 /* Not enough room for even the info struct. */ 1094 if (buflen < infosize) { 1095 *sizep = 0; 1096 return (ENOMEM); 1097 } 1098 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1099 memset(buf, 0, min(tsize, buflen)); 1100 1101 switch (*name) { 1102 #ifdef SYSVMSG 1103 case KERN_SYSVIPC_MSG_INFO: 1104 msgsi = (struct msg_sysctl_info *)buf; 1105 buf2 = &msgsi->msgids[0]; 1106 msgsi->msginfo = msginfo; 1107 break; 1108 #endif 1109 #ifdef SYSVSEM 1110 case KERN_SYSVIPC_SEM_INFO: 1111 semsi = (struct sem_sysctl_info *)buf; 1112 buf2 = &semsi->semids[0]; 1113 semsi->seminfo = seminfo; 1114 break; 1115 #endif 1116 #ifdef SYSVSHM 1117 case KERN_SYSVIPC_SHM_INFO: 1118 shmsi = (struct shm_sysctl_info *)buf; 1119 buf2 = &shmsi->shmids[0]; 1120 shmsi->shminfo = shminfo; 1121 break; 1122 #endif 1123 } 1124 buflen -= infosize; 1125 1126 ret = 0; 1127 if (buflen > 0) { 1128 /* Fill in the IPC data structures. */ 1129 for (i = 0; i < nds; i++) { 1130 if (buflen < dssize) { 1131 ret = ENOMEM; 1132 break; 1133 } 1134 switch (*name) { 1135 #ifdef SYSVMSG 1136 case KERN_SYSVIPC_MSG_INFO: 1137 FILL_MSG(msqids[i], msgsi->msgids[i]); 1138 break; 1139 #endif 1140 #ifdef SYSVSEM 1141 case KERN_SYSVIPC_SEM_INFO: 1142 FILL_SEM(sema[i], semsi->semids[i]); 1143 break; 1144 #endif 1145 #ifdef SYSVSHM 1146 case KERN_SYSVIPC_SHM_INFO: 1147 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1148 break; 1149 #endif 1150 } 1151 buflen -= dssize; 1152 } 1153 } 1154 *sizep -= buflen; 1155 error = copyout(buf, start, *sizep); 1156 /* If copyout succeeded, use return code set earlier. */ 1157 if (error == 0) 1158 error = ret; 1159 if (buf) 1160 free(buf, M_TEMP); 1161 return (error); 1162 } 1163 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1164 1165 static int 1166 sysctl_msgbuf(vwhere, sizep) 1167 void *vwhere; 1168 size_t *sizep; 1169 { 1170 char *where = vwhere; 1171 size_t len, maxlen = *sizep; 1172 long pos; 1173 int error; 1174 1175 /* 1176 * deal with cases where the message buffer has 1177 * become corrupted. 1178 */ 1179 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1180 msgbufenabled = 0; 1181 return (ENXIO); 1182 } 1183 1184 if (where == NULL) { 1185 /* always return full buffer size */ 1186 *sizep = msgbufp->msg_bufs; 1187 return (0); 1188 } 1189 1190 error = 0; 1191 maxlen = min(msgbufp->msg_bufs, maxlen); 1192 pos = msgbufp->msg_bufx; 1193 while (maxlen > 0) { 1194 len = pos == 0 ? msgbufp->msg_bufx : msgbufp->msg_bufs - msgbufp->msg_bufx; 1195 len = min(len, maxlen); 1196 if (len == 0) 1197 break; 1198 error = copyout(&msgbufp->msg_bufc[pos], where, len); 1199 if (error) 1200 break; 1201 where += len; 1202 maxlen -= len; 1203 pos = 0; 1204 } 1205 return (error); 1206 } 1207 1208 /* 1209 * try over estimating by 5 procs 1210 */ 1211 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1212 1213 static int 1214 sysctl_doeproc(name, namelen, vwhere, sizep) 1215 int *name; 1216 u_int namelen; 1217 void *vwhere; 1218 size_t *sizep; 1219 { 1220 struct eproc eproc; 1221 struct kinfo_proc2 kproc2; 1222 struct kinfo_proc *dp; 1223 struct proc *p; 1224 const struct proclist_desc *pd; 1225 char *where, *dp2; 1226 int type, op, arg, elem_size, elem_count; 1227 int buflen, needed, error; 1228 1229 dp = vwhere; 1230 dp2 = where = vwhere; 1231 buflen = where != NULL ? *sizep : 0; 1232 error = needed = 0; 1233 type = name[0]; 1234 1235 if (type == KERN_PROC) { 1236 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1237 return (EINVAL); 1238 op = name[1]; 1239 if (op != KERN_PROC_ALL) 1240 arg = name[2]; 1241 } else { 1242 if (namelen != 5) 1243 return (EINVAL); 1244 op = name[1]; 1245 arg = name[2]; 1246 elem_size = name[3]; 1247 elem_count = name[4]; 1248 } 1249 1250 proclist_lock_read(); 1251 1252 pd = proclists; 1253 again: 1254 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1255 /* 1256 * Skip embryonic processes. 1257 */ 1258 if (p->p_stat == SIDL) 1259 continue; 1260 /* 1261 * TODO - make more efficient (see notes below). 1262 * do by session. 1263 */ 1264 switch (op) { 1265 1266 case KERN_PROC_PID: 1267 /* could do this with just a lookup */ 1268 if (p->p_pid != (pid_t)arg) 1269 continue; 1270 break; 1271 1272 case KERN_PROC_PGRP: 1273 /* could do this by traversing pgrp */ 1274 if (p->p_pgrp->pg_id != (pid_t)arg) 1275 continue; 1276 break; 1277 1278 case KERN_PROC_SESSION: 1279 if (p->p_session->s_sid != (pid_t)arg) 1280 continue; 1281 break; 1282 1283 case KERN_PROC_TTY: 1284 if (arg == KERN_PROC_TTY_REVOKE) { 1285 if ((p->p_flag & P_CONTROLT) == 0 || 1286 p->p_session->s_ttyp == NULL || 1287 p->p_session->s_ttyvp != NULL) 1288 continue; 1289 } else if ((p->p_flag & P_CONTROLT) == 0 || 1290 p->p_session->s_ttyp == NULL) { 1291 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1292 continue; 1293 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1294 continue; 1295 break; 1296 1297 case KERN_PROC_UID: 1298 if (p->p_ucred->cr_uid != (uid_t)arg) 1299 continue; 1300 break; 1301 1302 case KERN_PROC_RUID: 1303 if (p->p_cred->p_ruid != (uid_t)arg) 1304 continue; 1305 break; 1306 1307 case KERN_PROC_GID: 1308 if (p->p_ucred->cr_gid != (uid_t)arg) 1309 continue; 1310 break; 1311 1312 case KERN_PROC_RGID: 1313 if (p->p_cred->p_rgid != (uid_t)arg) 1314 continue; 1315 break; 1316 1317 case KERN_PROC_ALL: 1318 /* allow everything */ 1319 break; 1320 1321 default: 1322 error = EINVAL; 1323 goto cleanup; 1324 } 1325 if (type == KERN_PROC) { 1326 if (buflen >= sizeof(struct kinfo_proc)) { 1327 fill_eproc(p, &eproc); 1328 error = copyout((caddr_t)p, &dp->kp_proc, 1329 sizeof(struct proc)); 1330 if (error) 1331 goto cleanup; 1332 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1333 sizeof(eproc)); 1334 if (error) 1335 goto cleanup; 1336 dp++; 1337 buflen -= sizeof(struct kinfo_proc); 1338 } 1339 needed += sizeof(struct kinfo_proc); 1340 } else { /* KERN_PROC2 */ 1341 if (buflen >= elem_size && elem_count > 0) { 1342 fill_kproc2(p, &kproc2); 1343 /* 1344 * Copy out elem_size, but not larger than 1345 * the size of a struct kinfo_proc2. 1346 */ 1347 error = copyout(&kproc2, dp2, 1348 min(sizeof(kproc2), elem_size)); 1349 if (error) 1350 goto cleanup; 1351 dp2 += elem_size; 1352 buflen -= elem_size; 1353 elem_count--; 1354 } 1355 needed += elem_size; 1356 } 1357 } 1358 pd++; 1359 if (pd->pd_list != NULL) 1360 goto again; 1361 proclist_unlock_read(); 1362 1363 if (where != NULL) { 1364 if (type == KERN_PROC) 1365 *sizep = (caddr_t)dp - where; 1366 else 1367 *sizep = dp2 - where; 1368 if (needed > *sizep) 1369 return (ENOMEM); 1370 } else { 1371 needed += KERN_PROCSLOP; 1372 *sizep = needed; 1373 } 1374 return (0); 1375 cleanup: 1376 proclist_unlock_read(); 1377 return (error); 1378 } 1379 1380 /* 1381 * Fill in an eproc structure for the specified process. 1382 */ 1383 void 1384 fill_eproc(p, ep) 1385 struct proc *p; 1386 struct eproc *ep; 1387 { 1388 struct tty *tp; 1389 1390 ep->e_paddr = p; 1391 ep->e_sess = p->p_session; 1392 ep->e_pcred = *p->p_cred; 1393 ep->e_ucred = *p->p_ucred; 1394 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1395 ep->e_vm.vm_rssize = 0; 1396 ep->e_vm.vm_tsize = 0; 1397 ep->e_vm.vm_dsize = 0; 1398 ep->e_vm.vm_ssize = 0; 1399 /* ep->e_vm.vm_pmap = XXX; */ 1400 } else { 1401 struct vmspace *vm = p->p_vmspace; 1402 1403 ep->e_vm.vm_rssize = vm_resident_count(vm); 1404 ep->e_vm.vm_tsize = vm->vm_tsize; 1405 ep->e_vm.vm_dsize = vm->vm_dsize; 1406 ep->e_vm.vm_ssize = vm->vm_ssize; 1407 } 1408 if (p->p_pptr) 1409 ep->e_ppid = p->p_pptr->p_pid; 1410 else 1411 ep->e_ppid = 0; 1412 ep->e_pgid = p->p_pgrp->pg_id; 1413 ep->e_sid = ep->e_sess->s_sid; 1414 ep->e_jobc = p->p_pgrp->pg_jobc; 1415 if ((p->p_flag & P_CONTROLT) && 1416 (tp = ep->e_sess->s_ttyp)) { 1417 ep->e_tdev = tp->t_dev; 1418 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1419 ep->e_tsess = tp->t_session; 1420 } else 1421 ep->e_tdev = NODEV; 1422 if (p->p_wmesg) 1423 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1424 ep->e_xsize = ep->e_xrssize = 0; 1425 ep->e_xccount = ep->e_xswrss = 0; 1426 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1427 if (SESS_LEADER(p)) 1428 ep->e_flag |= EPROC_SLEADER; 1429 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1430 } 1431 1432 /* 1433 * Fill in an eproc structure for the specified process. 1434 */ 1435 static void 1436 fill_kproc2(p, ki) 1437 struct proc *p; 1438 struct kinfo_proc2 *ki; 1439 { 1440 struct tty *tp; 1441 1442 memset(ki, 0, sizeof(*ki)); 1443 1444 ki->p_forw = PTRTOINT64(p->p_forw); 1445 ki->p_back = PTRTOINT64(p->p_back); 1446 ki->p_paddr = PTRTOINT64(p); 1447 1448 ki->p_addr = PTRTOINT64(p->p_addr); 1449 ki->p_fd = PTRTOINT64(p->p_fd); 1450 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1451 ki->p_stats = PTRTOINT64(p->p_stats); 1452 ki->p_limit = PTRTOINT64(p->p_limit); 1453 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1454 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1455 ki->p_sess = PTRTOINT64(p->p_session); 1456 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1457 ki->p_ru = PTRTOINT64(p->p_ru); 1458 1459 ki->p_eflag = 0; 1460 ki->p_exitsig = p->p_exitsig; 1461 ki->p_flag = p->p_flag; 1462 1463 ki->p_pid = p->p_pid; 1464 if (p->p_pptr) 1465 ki->p_ppid = p->p_pptr->p_pid; 1466 else 1467 ki->p_ppid = 0; 1468 ki->p_sid = p->p_session->s_sid; 1469 ki->p__pgid = p->p_pgrp->pg_id; 1470 1471 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1472 1473 ki->p_uid = p->p_ucred->cr_uid; 1474 ki->p_ruid = p->p_cred->p_ruid; 1475 ki->p_gid = p->p_ucred->cr_gid; 1476 ki->p_rgid = p->p_cred->p_rgid; 1477 1478 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1479 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1480 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1481 1482 ki->p_jobc = p->p_pgrp->pg_jobc; 1483 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1484 ki->p_tdev = tp->t_dev; 1485 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1486 ki->p_tsess = PTRTOINT64(tp->t_session); 1487 } else { 1488 ki->p_tdev = NODEV; 1489 } 1490 1491 ki->p_estcpu = p->p_estcpu; 1492 ki->p_rtime_sec = p->p_rtime.tv_sec; 1493 ki->p_rtime_usec = p->p_rtime.tv_usec; 1494 ki->p_cpticks = p->p_cpticks; 1495 ki->p_pctcpu = p->p_pctcpu; 1496 ki->p_swtime = p->p_swtime; 1497 ki->p_slptime = p->p_slptime; 1498 if (p->p_stat == SONPROC) { 1499 KDASSERT(p->p_cpu != NULL); 1500 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1501 } else 1502 ki->p_schedflags = 0; 1503 1504 ki->p_uticks = p->p_uticks; 1505 ki->p_sticks = p->p_sticks; 1506 ki->p_iticks = p->p_iticks; 1507 1508 ki->p_tracep = PTRTOINT64(p->p_tracep); 1509 ki->p_traceflag = p->p_traceflag; 1510 1511 ki->p_holdcnt = p->p_holdcnt; 1512 1513 memcpy(&ki->p_siglist, &p->p_siglist, sizeof(ki_sigset_t)); 1514 memcpy(&ki->p_sigmask, &p->p_sigmask, sizeof(ki_sigset_t)); 1515 memcpy(&ki->p_sigignore, &p->p_sigignore, sizeof(ki_sigset_t)); 1516 memcpy(&ki->p_sigcatch, &p->p_sigcatch, sizeof(ki_sigset_t)); 1517 1518 ki->p_stat = p->p_stat; 1519 ki->p_priority = p->p_priority; 1520 ki->p_usrpri = p->p_usrpri; 1521 ki->p_nice = p->p_nice; 1522 1523 ki->p_xstat = p->p_xstat; 1524 ki->p_acflag = p->p_acflag; 1525 1526 strncpy(ki->p_comm, p->p_comm, 1527 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1528 1529 if (p->p_wmesg) 1530 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1531 ki->p_wchan = PTRTOINT64(p->p_wchan); 1532 1533 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1534 1535 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1536 ki->p_vm_rssize = 0; 1537 ki->p_vm_tsize = 0; 1538 ki->p_vm_dsize = 0; 1539 ki->p_vm_ssize = 0; 1540 } else { 1541 struct vmspace *vm = p->p_vmspace; 1542 1543 ki->p_vm_rssize = vm_resident_count(vm); 1544 ki->p_vm_tsize = vm->vm_tsize; 1545 ki->p_vm_dsize = vm->vm_dsize; 1546 ki->p_vm_ssize = vm->vm_ssize; 1547 } 1548 1549 if (p->p_session->s_ttyvp) 1550 ki->p_eflag |= EPROC_CTTY; 1551 if (SESS_LEADER(p)) 1552 ki->p_eflag |= EPROC_SLEADER; 1553 1554 /* XXX Is this double check necessary? */ 1555 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1556 ki->p_uvalid = 0; 1557 } else { 1558 ki->p_uvalid = 1; 1559 1560 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1561 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1562 1563 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1564 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1565 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1566 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1567 1568 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1569 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1570 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1571 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1572 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1573 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1574 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1575 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1576 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1577 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1578 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1579 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1580 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1581 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1582 1583 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1584 p->p_stats->p_cru.ru_stime.tv_sec; 1585 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1586 p->p_stats->p_cru.ru_stime.tv_usec; 1587 } 1588 } 1589 1590 int 1591 sysctl_procargs(name, namelen, where, sizep, up) 1592 int *name; 1593 u_int namelen; 1594 void *where; 1595 size_t *sizep; 1596 struct proc *up; 1597 { 1598 struct ps_strings pss; 1599 struct proc *p; 1600 size_t len, upper_bound, xlen; 1601 struct uio auio; 1602 struct iovec aiov; 1603 vaddr_t argv; 1604 pid_t pid; 1605 int nargv, type, error, i; 1606 char *arg; 1607 char *tmp; 1608 1609 if (namelen != 2) 1610 return (EINVAL); 1611 pid = name[0]; 1612 type = name[1]; 1613 1614 switch (type) { 1615 case KERN_PROC_ARGV: 1616 case KERN_PROC_NARGV: 1617 case KERN_PROC_ENV: 1618 case KERN_PROC_NENV: 1619 /* ok */ 1620 break; 1621 default: 1622 return (EINVAL); 1623 } 1624 1625 /* check pid */ 1626 if ((p = pfind(pid)) == NULL) 1627 return (EINVAL); 1628 1629 /* only root or same user change look at the environment */ 1630 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1631 if (up->p_ucred->cr_uid != 0) { 1632 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1633 up->p_cred->p_ruid != p->p_cred->p_svuid) 1634 return (EPERM); 1635 } 1636 } 1637 1638 if (sizep != NULL && where == NULL) { 1639 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1640 *sizep = sizeof (int); 1641 else 1642 *sizep = ARG_MAX; /* XXX XXX XXX */ 1643 return (0); 1644 } 1645 if (where == NULL || sizep == NULL) 1646 return (EINVAL); 1647 1648 /* 1649 * Zombies don't have a stack, so we can't read their psstrings. 1650 * System processes also don't have a user stack. 1651 */ 1652 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1653 return (EINVAL); 1654 1655 /* 1656 * Lock the process down in memory. 1657 */ 1658 /* XXXCDC: how should locking work here? */ 1659 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1660 return (EFAULT); 1661 PHOLD(p); 1662 p->p_vmspace->vm_refcnt++; /* XXX */ 1663 1664 /* 1665 * Allocate a temporary buffer to hold the arguments. 1666 */ 1667 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1668 1669 /* 1670 * Read in the ps_strings structure. 1671 */ 1672 aiov.iov_base = &pss; 1673 aiov.iov_len = sizeof(pss); 1674 auio.uio_iov = &aiov; 1675 auio.uio_iovcnt = 1; 1676 auio.uio_offset = (vaddr_t)p->p_psstr; 1677 auio.uio_resid = sizeof(pss); 1678 auio.uio_segflg = UIO_SYSSPACE; 1679 auio.uio_rw = UIO_READ; 1680 auio.uio_procp = NULL; 1681 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1682 if (error) 1683 goto done; 1684 1685 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1686 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1687 else 1688 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1689 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1690 error = copyout(&nargv, where, sizeof(nargv)); 1691 *sizep = sizeof(nargv); 1692 goto done; 1693 } 1694 /* 1695 * Now read the address of the argument vector. 1696 */ 1697 switch (type) { 1698 case KERN_PROC_ARGV: 1699 /* XXX compat32 stuff here */ 1700 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1701 break; 1702 case KERN_PROC_ENV: 1703 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1704 break; 1705 default: 1706 return (EINVAL); 1707 } 1708 auio.uio_offset = (off_t)(long)tmp; 1709 aiov.iov_base = &argv; 1710 aiov.iov_len = sizeof(argv); 1711 auio.uio_iov = &aiov; 1712 auio.uio_iovcnt = 1; 1713 auio.uio_resid = sizeof(argv); 1714 auio.uio_segflg = UIO_SYSSPACE; 1715 auio.uio_rw = UIO_READ; 1716 auio.uio_procp = NULL; 1717 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1718 if (error) 1719 goto done; 1720 1721 /* 1722 * Now copy in the actual argument vector, one page at a time, 1723 * since we don't know how long the vector is (though, we do 1724 * know how many NUL-terminated strings are in the vector). 1725 */ 1726 len = 0; 1727 upper_bound = *sizep; 1728 for (; nargv != 0 && len < upper_bound; len += xlen) { 1729 aiov.iov_base = arg; 1730 aiov.iov_len = PAGE_SIZE; 1731 auio.uio_iov = &aiov; 1732 auio.uio_iovcnt = 1; 1733 auio.uio_offset = argv + len; 1734 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1735 auio.uio_resid = xlen; 1736 auio.uio_segflg = UIO_SYSSPACE; 1737 auio.uio_rw = UIO_READ; 1738 auio.uio_procp = NULL; 1739 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1740 if (error) 1741 goto done; 1742 1743 for (i = 0; i < xlen && nargv != 0; i++) { 1744 if (arg[i] == '\0') 1745 nargv--; /* one full string */ 1746 } 1747 1748 /* make sure we don't copyout past the end of the user's buffer */ 1749 if (len + i > upper_bound) 1750 i = upper_bound - len; 1751 1752 error = copyout(arg, (char *)where + len, i); 1753 if (error) 1754 break; 1755 1756 if (nargv == 0) { 1757 len += i; 1758 break; 1759 } 1760 } 1761 *sizep = len; 1762 1763 done: 1764 PRELE(p); 1765 uvmspace_free(p->p_vmspace); 1766 1767 free(arg, M_TEMP); 1768 return (error); 1769 } 1770
Indexes created Tue Sep 30 07:10:03 GMT 2025