kern_sysctl.c revision 1.73.2.5
1 /* $NetBSD: kern_sysctl.c,v 1.73.2.5 2003/08/27 03:18:10 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 size_t *oldlenp; 139 140 /* 141 * all top-level sysctl names are non-terminal 142 */ 143 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 144 return (EINVAL); 145 error = copyin(SCARG(uap, name), &name, 146 SCARG(uap, namelen) * sizeof(int)); 147 if (error) 148 return (error); 149 150 /* 151 * For all but CTL_PROC, must be root to change a value. 152 * For CTL_PROC, must be root, or owner of the proc (and not suid), 153 * this is checked in proc_sysctl() (once we know the targer proc). 154 */ 155 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 156 (error = suser(p->p_ucred, &p->p_acflag))) 157 return error; 158 159 switch (name[0]) { 160 case CTL_KERN: 161 fn = kern_sysctl; 162 break; 163 case CTL_HW: 164 fn = hw_sysctl; 165 break; 166 case CTL_VM: 167 fn = uvm_sysctl; 168 break; 169 case CTL_NET: 170 fn = net_sysctl; 171 break; 172 case CTL_VFS: 173 fn = vfs_sysctl; 174 break; 175 case CTL_MACHDEP: 176 fn = cpu_sysctl; 177 break; 178 #ifdef DEBUG 179 case CTL_DEBUG: 180 fn = debug_sysctl; 181 break; 182 #endif 183 #ifdef DDB 184 case CTL_DDB: 185 fn = ddb_sysctl; 186 break; 187 #endif 188 case CTL_PROC: 189 fn = proc_sysctl; 190 break; 191 default: 192 return (EOPNOTSUPP); 193 } 194 195 /* 196 * XXX Hey, we wire `old', but what about `new'? 197 */ 198 199 oldlenp = SCARG(uap, oldlenp); 200 if (oldlenp) { 201 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 202 return (error); 203 oldlenp = &oldlen; 204 } 205 if (SCARG(uap, old) != NULL) { 206 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 207 if (error) 208 return (error); 209 if (uvm_vslock(p, SCARG(uap, old), oldlen, 210 VM_PROT_READ|VM_PROT_WRITE) != KERN_SUCCESS) { 211 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 212 return (EFAULT); 213 } 214 savelen = oldlen; 215 } 216 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 217 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 218 if (SCARG(uap, old) != NULL) { 219 uvm_vsunlock(p, SCARG(uap, old), savelen); 220 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 221 } 222 if (error) 223 return (error); 224 if (SCARG(uap, oldlenp)) 225 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 226 return (error); 227 } 228 229 /* 230 * Attributes stored in the kernel. 231 */ 232 char hostname[MAXHOSTNAMELEN]; 233 int hostnamelen; 234 235 char domainname[MAXHOSTNAMELEN]; 236 int domainnamelen; 237 238 long hostid; 239 240 #ifdef INSECURE 241 int securelevel = -1; 242 #else 243 int securelevel = 0; 244 #endif 245 246 #ifndef DEFCORENAME 247 #define DEFCORENAME "%n.core" 248 #endif 249 char defcorename[MAXPATHLEN] = DEFCORENAME; 250 int defcorenamelen = sizeof(DEFCORENAME); 251 252 extern int kern_logsigexit; 253 extern fixpt_t ccpu; 254 255 /* 256 * kernel related system variables. 257 */ 258 int 259 kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 260 int *name; 261 u_int namelen; 262 void *oldp; 263 size_t *oldlenp; 264 void *newp; 265 size_t newlen; 266 struct proc *p; 267 { 268 int error, level, inthostid; 269 int old_autonicetime; 270 int old_vnodes; 271 dev_t consdev; 272 273 /* All sysctl names at this level, except for a few, are terminal. */ 274 switch (name[0]) { 275 case KERN_PROC: 276 case KERN_PROC2: 277 case KERN_PROF: 278 case KERN_MBUF: 279 case KERN_PROC_ARGS: 280 case KERN_SYSVIPC_INFO: 281 /* Not terminal. */ 282 break; 283 default: 284 if (namelen != 1) 285 return (ENOTDIR); /* overloaded */ 286 } 287 288 switch (name[0]) { 289 case KERN_OSTYPE: 290 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 291 case KERN_OSRELEASE: 292 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 293 case KERN_OSREV: 294 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 295 case KERN_VERSION: 296 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 297 case KERN_MAXVNODES: 298 old_vnodes = desiredvnodes; 299 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 300 if (old_vnodes > desiredvnodes) { 301 desiredvnodes = old_vnodes; 302 return (EINVAL); 303 } 304 return (error); 305 case KERN_MAXPROC: 306 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 307 case KERN_MAXFILES: 308 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 309 case KERN_ARGMAX: 310 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 311 case KERN_SECURELVL: 312 level = securelevel; 313 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 314 newp == NULL) 315 return (error); 316 if (level < securelevel && p->p_pid != 1) 317 return (EPERM); 318 securelevel = level; 319 return (0); 320 case KERN_HOSTNAME: 321 error = sysctl_string(oldp, oldlenp, newp, newlen, 322 hostname, sizeof(hostname)); 323 if (newp && !error) 324 hostnamelen = newlen; 325 return (error); 326 case KERN_DOMAINNAME: 327 error = sysctl_string(oldp, oldlenp, newp, newlen, 328 domainname, sizeof(domainname)); 329 if (newp && !error) 330 domainnamelen = newlen; 331 return (error); 332 case KERN_HOSTID: 333 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 334 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 335 hostid = inthostid; 336 return (error); 337 case KERN_CLOCKRATE: 338 return (sysctl_clockrate(oldp, oldlenp)); 339 case KERN_BOOTTIME: 340 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 341 sizeof(struct timeval))); 342 case KERN_VNODE: 343 return (sysctl_vnode(oldp, oldlenp, p)); 344 case KERN_PROC: 345 case KERN_PROC2: 346 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 347 case KERN_PROC_ARGS: 348 return (sysctl_procargs(name + 1, namelen - 1, 349 oldp, oldlenp, p)); 350 case KERN_FILE: 351 return (sysctl_file(oldp, oldlenp)); 352 #ifdef GPROF 353 case KERN_PROF: 354 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 355 newp, newlen)); 356 #endif 357 case KERN_POSIX1: 358 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 359 case KERN_NGROUPS: 360 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 361 case KERN_JOB_CONTROL: 362 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 363 case KERN_SAVED_IDS: 364 #ifdef _POSIX_SAVED_IDS 365 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 366 #else 367 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 368 #endif 369 case KERN_MAXPARTITIONS: 370 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 371 case KERN_RAWPARTITION: 372 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 373 #ifdef NTP 374 case KERN_NTPTIME: 375 return (sysctl_ntptime(oldp, oldlenp)); 376 #endif 377 case KERN_AUTONICETIME: 378 old_autonicetime = autonicetime; 379 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 380 if (autonicetime < 0) 381 autonicetime = old_autonicetime; 382 return (error); 383 case KERN_AUTONICEVAL: 384 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 385 if (autoniceval < PRIO_MIN) 386 autoniceval = PRIO_MIN; 387 if (autoniceval > PRIO_MAX) 388 autoniceval = PRIO_MAX; 389 return (error); 390 case KERN_RTC_OFFSET: 391 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 392 case KERN_ROOT_DEVICE: 393 return (sysctl_rdstring(oldp, oldlenp, newp, 394 root_device->dv_xname)); 395 case KERN_MSGBUFSIZE: 396 /* 397 * deal with cases where the message buffer has 398 * become corrupted. 399 */ 400 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 401 msgbufenabled = 0; 402 return (ENXIO); 403 } 404 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 405 case KERN_FSYNC: 406 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 407 case KERN_SYSVMSG: 408 #ifdef SYSVMSG 409 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 410 #else 411 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 412 #endif 413 case KERN_SYSVSEM: 414 #ifdef SYSVSEM 415 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 416 #else 417 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 418 #endif 419 case KERN_SYSVSHM: 420 #ifdef SYSVSHM 421 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 422 #else 423 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 424 #endif 425 case KERN_DEFCORENAME: 426 if (newp && newlen < 1) 427 return (EINVAL); 428 error = sysctl_string(oldp, oldlenp, newp, newlen, 429 defcorename, sizeof(defcorename)); 430 if (newp && !error) 431 defcorenamelen = newlen; 432 return (error); 433 case KERN_SYNCHRONIZED_IO: 434 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 435 case KERN_IOV_MAX: 436 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 437 case KERN_MBUF: 438 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 439 newp, newlen)); 440 case KERN_MAPPED_FILES: 441 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 442 case KERN_MEMLOCK: 443 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 444 case KERN_MEMLOCK_RANGE: 445 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 446 case KERN_MEMORY_PROTECTION: 447 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 448 case KERN_LOGIN_NAME_MAX: 449 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 450 case KERN_LOGSIGEXIT: 451 return (sysctl_int(oldp, oldlenp, newp, newlen, 452 &kern_logsigexit)); 453 case KERN_FSCALE: 454 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 455 case KERN_CCPU: 456 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 457 case KERN_CP_TIME: 458 /* XXXSMP: WRONG! */ 459 return (sysctl_rdstruct(oldp, oldlenp, newp, 460 curcpu()->ci_schedstate.spc_cp_time, 461 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 462 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 463 case KERN_SYSVIPC_INFO: 464 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 465 #endif 466 case KERN_MSGBUF: 467 return (sysctl_msgbuf(oldp, oldlenp)); 468 case KERN_CONSDEV: 469 if (cn_tab != NULL) 470 consdev = cn_tab->cn_dev; 471 else 472 consdev = NODEV; 473 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 474 sizeof consdev)); 475 default: 476 return (EOPNOTSUPP); 477 } 478 /* NOTREACHED */ 479 } 480 481 /* 482 * hardware related system variables. 483 */ 484 int 485 hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 486 int *name; 487 u_int namelen; 488 void *oldp; 489 size_t *oldlenp; 490 void *newp; 491 size_t newlen; 492 struct proc *p; 493 { 494 495 /* all sysctl names at this level are terminal */ 496 if (namelen != 1) 497 return (ENOTDIR); /* overloaded */ 498 499 switch (name[0]) { 500 case HW_MACHINE: 501 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 502 case HW_MACHINE_ARCH: 503 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 504 case HW_MODEL: 505 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 506 case HW_NCPU: 507 return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */ 508 case HW_BYTEORDER: 509 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 510 case HW_PHYSMEM: 511 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 512 case HW_USERMEM: 513 return (sysctl_rdint(oldp, oldlenp, newp, 514 ctob(physmem - uvmexp.wired))); 515 case HW_PAGESIZE: 516 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 517 case HW_ALIGNBYTES: 518 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 519 default: 520 return (EOPNOTSUPP); 521 } 522 /* NOTREACHED */ 523 } 524 525 #ifdef DEBUG 526 /* 527 * Debugging related system variables. 528 */ 529 struct ctldebug debug0, debug1, debug2, debug3, debug4; 530 struct ctldebug debug5, debug6, debug7, debug8, debug9; 531 struct ctldebug debug10, debug11, debug12, debug13, debug14; 532 struct ctldebug debug15, debug16, debug17, debug18, debug19; 533 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 534 &debug0, &debug1, &debug2, &debug3, &debug4, 535 &debug5, &debug6, &debug7, &debug8, &debug9, 536 &debug10, &debug11, &debug12, &debug13, &debug14, 537 &debug15, &debug16, &debug17, &debug18, &debug19, 538 }; 539 int 540 debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 541 int *name; 542 u_int namelen; 543 void *oldp; 544 size_t *oldlenp; 545 void *newp; 546 size_t newlen; 547 struct proc *p; 548 { 549 struct ctldebug *cdp; 550 551 /* all sysctl names at this level are name and field */ 552 if (namelen != 2) 553 return (ENOTDIR); /* overloaded */ 554 cdp = debugvars[name[0]]; 555 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 556 return (EOPNOTSUPP); 557 switch (name[1]) { 558 case CTL_DEBUG_NAME: 559 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 560 case CTL_DEBUG_VALUE: 561 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 562 default: 563 return (EOPNOTSUPP); 564 } 565 /* NOTREACHED */ 566 } 567 #endif /* DEBUG */ 568 569 int 570 proc_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 571 int *name; 572 u_int namelen; 573 void *oldp; 574 size_t *oldlenp; 575 void *newp; 576 size_t newlen; 577 struct proc *p; 578 { 579 struct proc *ptmp = NULL; 580 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] >= PROC_PID_LIMIT_MAXID) 682 return EINVAL; 683 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 684 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 685 error = sysctl_quad(oldp, oldlenp, newp, newlen, 686 &alim.rlim_max); 687 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 688 error = sysctl_quad(oldp, oldlenp, newp, newlen, 689 &alim.rlim_cur); 690 else 691 error = EINVAL; 692 693 if (error) 694 return error; 695 696 if (newp) 697 error = dosetrlimit(ptmp, p->p_cred, 698 name[2] - 1, &alim); 699 return error; 700 } 701 return (EINVAL); 702 } 703 704 /* 705 * Convenience macros. 706 */ 707 708 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 709 if (oldlenp) { \ 710 if (!oldp) \ 711 *oldlenp = len; \ 712 else { \ 713 if (*oldlenp < len) \ 714 return(ENOMEM); \ 715 *oldlenp = len; \ 716 error = copyout((caddr_t)valp, oldp, len); \ 717 } \ 718 } 719 720 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 721 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 722 723 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 724 if (newp && newlen != len) \ 725 return (EINVAL); 726 727 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 728 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 729 730 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 731 if (error == 0 && newp) \ 732 error = copyin(newp, valp, len); 733 734 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 735 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 736 737 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 738 if (oldlenp) { \ 739 len = strlen(str) + 1; \ 740 if (!oldp) \ 741 *oldlenp = len; \ 742 else { \ 743 if (*oldlenp < len) { \ 744 err2 = ENOMEM; \ 745 len = *oldlenp; \ 746 } else \ 747 *oldlenp = len; \ 748 error = copyout(str, oldp, len);\ 749 if (error == 0) \ 750 error = err2; \ 751 } \ 752 } 753 754 /* 755 * Validate parameters and get old / set new parameters 756 * for an integer-valued sysctl function. 757 */ 758 int 759 sysctl_int(oldp, oldlenp, newp, newlen, valp) 760 void *oldp; 761 size_t *oldlenp; 762 void *newp; 763 size_t newlen; 764 int *valp; 765 { 766 int error = 0; 767 768 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 769 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 770 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 771 772 return (error); 773 } 774 775 776 /* 777 * As above, but read-only. 778 */ 779 int 780 sysctl_rdint(oldp, oldlenp, newp, val) 781 void *oldp; 782 size_t *oldlenp; 783 void *newp; 784 int val; 785 { 786 int error = 0; 787 788 if (newp) 789 return (EPERM); 790 791 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 792 793 return (error); 794 } 795 796 /* 797 * Validate parameters and get old / set new parameters 798 * for an quad-valued sysctl function. 799 */ 800 int 801 sysctl_quad(oldp, oldlenp, newp, newlen, valp) 802 void *oldp; 803 size_t *oldlenp; 804 void *newp; 805 size_t newlen; 806 quad_t *valp; 807 { 808 int error = 0; 809 810 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 811 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 812 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 813 814 return (error); 815 } 816 817 /* 818 * As above, but read-only. 819 */ 820 int 821 sysctl_rdquad(oldp, oldlenp, newp, val) 822 void *oldp; 823 size_t *oldlenp; 824 void *newp; 825 quad_t val; 826 { 827 int error = 0; 828 829 if (newp) 830 return (EPERM); 831 832 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 833 834 return (error); 835 } 836 837 /* 838 * Validate parameters and get old / set new parameters 839 * for a string-valued sysctl function. 840 */ 841 int 842 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 843 void *oldp; 844 size_t *oldlenp; 845 void *newp; 846 size_t newlen; 847 char *str; 848 int maxlen; 849 { 850 int len, error = 0, err2 = 0; 851 852 if (newp && newlen >= maxlen) 853 return (EINVAL); 854 855 SYSCTL_STRING_CORE(oldp, oldlenp, str); 856 857 if (error == 0 && newp) { 858 error = copyin(newp, str, newlen); 859 str[newlen] = 0; 860 } 861 return (error); 862 } 863 864 /* 865 * As above, but read-only. 866 */ 867 int 868 sysctl_rdstring(oldp, oldlenp, newp, str) 869 void *oldp; 870 size_t *oldlenp; 871 void *newp; 872 const char *str; 873 { 874 int len, error = 0, err2 = 0; 875 876 if (newp) 877 return (EPERM); 878 879 SYSCTL_STRING_CORE(oldp, oldlenp, str); 880 881 return (error); 882 } 883 884 /* 885 * Validate parameters and get old / set new parameters 886 * for a structure oriented sysctl function. 887 */ 888 int 889 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 890 void *oldp; 891 size_t *oldlenp; 892 void *newp; 893 size_t newlen; 894 void *sp; 895 int len; 896 { 897 int error = 0; 898 899 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 900 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 901 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 902 903 return (error); 904 } 905 906 /* 907 * Validate parameters and get old parameters 908 * for a structure oriented sysctl function. 909 */ 910 int 911 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 912 void *oldp; 913 size_t *oldlenp; 914 void *newp; 915 const void *sp; 916 int len; 917 { 918 int error = 0; 919 920 if (newp) 921 return (EPERM); 922 923 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 924 925 return (error); 926 } 927 928 /* 929 * Get file structures. 930 */ 931 static int 932 sysctl_file(vwhere, sizep) 933 void *vwhere; 934 size_t *sizep; 935 { 936 int buflen, error; 937 struct file *fp; 938 char *start, *where; 939 940 start = where = vwhere; 941 buflen = *sizep; 942 if (where == NULL) { 943 /* 944 * overestimate by 10 files 945 */ 946 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 947 return (0); 948 } 949 950 /* 951 * first copyout filehead 952 */ 953 if (buflen < sizeof(filehead)) { 954 *sizep = 0; 955 return (0); 956 } 957 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 958 if (error) 959 return (error); 960 buflen -= sizeof(filehead); 961 where += sizeof(filehead); 962 963 /* 964 * followed by an array of file structures 965 */ 966 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 967 if (buflen < sizeof(struct file)) { 968 *sizep = where - start; 969 return (ENOMEM); 970 } 971 error = copyout((caddr_t)fp, where, sizeof(struct file)); 972 if (error) 973 return (error); 974 buflen -= sizeof(struct file); 975 where += sizeof(struct file); 976 } 977 *sizep = where - start; 978 return (0); 979 } 980 981 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 982 #define FILL_PERM(src, dst) do { \ 983 (dst)._key = (src)._key; \ 984 (dst).uid = (src).uid; \ 985 (dst).gid = (src).gid; \ 986 (dst).cuid = (src).cuid; \ 987 (dst).cgid = (src).cgid; \ 988 (dst).mode = (src).mode; \ 989 (dst)._seq = (src)._seq; \ 990 } while (0); 991 #define FILL_MSG(src, dst) do { \ 992 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 993 (dst).msg_qnum = (src).msg_qnum; \ 994 (dst).msg_qbytes = (src).msg_qbytes; \ 995 (dst)._msg_cbytes = (src)._msg_cbytes; \ 996 (dst).msg_lspid = (src).msg_lspid; \ 997 (dst).msg_lrpid = (src).msg_lrpid; \ 998 (dst).msg_stime = (src).msg_stime; \ 999 (dst).msg_rtime = (src).msg_rtime; \ 1000 (dst).msg_ctime = (src).msg_ctime; \ 1001 } while (0) 1002 #define FILL_SEM(src, dst) do { \ 1003 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1004 (dst).sem_nsems = (src).sem_nsems; \ 1005 (dst).sem_otime = (src).sem_otime; \ 1006 (dst).sem_ctime = (src).sem_ctime; \ 1007 } while (0) 1008 #define FILL_SHM(src, dst) do { \ 1009 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1010 (dst).shm_segsz = (src).shm_segsz; \ 1011 (dst).shm_lpid = (src).shm_lpid; \ 1012 (dst).shm_cpid = (src).shm_cpid; \ 1013 (dst).shm_atime = (src).shm_atime; \ 1014 (dst).shm_dtime = (src).shm_dtime; \ 1015 (dst).shm_ctime = (src).shm_ctime; \ 1016 (dst).shm_nattch = (src).shm_nattch; \ 1017 } while (0) 1018 1019 static int 1020 sysctl_sysvipc(name, namelen, where, sizep) 1021 int *name; 1022 u_int namelen; 1023 void *where; 1024 size_t *sizep; 1025 { 1026 #ifdef SYSVMSG 1027 struct msg_sysctl_info *msgsi; 1028 #endif 1029 #ifdef SYSVSEM 1030 struct sem_sysctl_info *semsi; 1031 #endif 1032 #ifdef SYSVSHM 1033 struct shm_sysctl_info *shmsi; 1034 #endif 1035 size_t infosize, dssize, tsize, buflen; 1036 void *buf = NULL, *buf2; 1037 char *start; 1038 int32_t nds; 1039 int i, error, ret; 1040 1041 if (namelen != 1) 1042 return (EINVAL); 1043 1044 start = where; 1045 buflen = *sizep; 1046 1047 switch (*name) { 1048 case KERN_SYSVIPC_MSG_INFO: 1049 #ifdef SYSVMSG 1050 infosize = sizeof(msgsi->msginfo); 1051 nds = msginfo.msgmni; 1052 dssize = sizeof(msgsi->msgids[0]); 1053 break; 1054 #else 1055 return (EINVAL); 1056 #endif 1057 case KERN_SYSVIPC_SEM_INFO: 1058 #ifdef SYSVSEM 1059 infosize = sizeof(semsi->seminfo); 1060 nds = seminfo.semmni; 1061 dssize = sizeof(semsi->semids[0]); 1062 break; 1063 #else 1064 return (EINVAL); 1065 #endif 1066 case KERN_SYSVIPC_SHM_INFO: 1067 #ifdef SYSVSHM 1068 infosize = sizeof(shmsi->shminfo); 1069 nds = shminfo.shmmni; 1070 dssize = sizeof(shmsi->shmids[0]); 1071 break; 1072 #else 1073 return (EINVAL); 1074 #endif 1075 default: 1076 return (EINVAL); 1077 } 1078 /* 1079 * Round infosize to 64 bit boundary if requesting more than just 1080 * the info structure or getting the total data size. 1081 */ 1082 if (where == NULL || *sizep > infosize) 1083 infosize = ((infosize + 7) / 8) * 8; 1084 tsize = infosize + nds * dssize; 1085 1086 /* Return just the total size required. */ 1087 if (where == NULL) { 1088 *sizep = tsize; 1089 return (0); 1090 } 1091 1092 /* Not enough room for even the info struct. */ 1093 if (buflen < infosize) { 1094 *sizep = 0; 1095 return (ENOMEM); 1096 } 1097 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1098 memset(buf, 0, min(tsize, buflen)); 1099 1100 switch (*name) { 1101 #ifdef SYSVMSG 1102 case KERN_SYSVIPC_MSG_INFO: 1103 msgsi = (struct msg_sysctl_info *)buf; 1104 buf2 = &msgsi->msgids[0]; 1105 msgsi->msginfo = msginfo; 1106 break; 1107 #endif 1108 #ifdef SYSVSEM 1109 case KERN_SYSVIPC_SEM_INFO: 1110 semsi = (struct sem_sysctl_info *)buf; 1111 buf2 = &semsi->semids[0]; 1112 semsi->seminfo = seminfo; 1113 break; 1114 #endif 1115 #ifdef SYSVSHM 1116 case KERN_SYSVIPC_SHM_INFO: 1117 shmsi = (struct shm_sysctl_info *)buf; 1118 buf2 = &shmsi->shmids[0]; 1119 shmsi->shminfo = shminfo; 1120 break; 1121 #endif 1122 } 1123 buflen -= infosize; 1124 1125 ret = 0; 1126 if (buflen > 0) { 1127 /* Fill in the IPC data structures. */ 1128 for (i = 0; i < nds; i++) { 1129 if (buflen < dssize) { 1130 ret = ENOMEM; 1131 break; 1132 } 1133 switch (*name) { 1134 #ifdef SYSVMSG 1135 case KERN_SYSVIPC_MSG_INFO: 1136 FILL_MSG(msqids[i], msgsi->msgids[i]); 1137 break; 1138 #endif 1139 #ifdef SYSVSEM 1140 case KERN_SYSVIPC_SEM_INFO: 1141 FILL_SEM(sema[i], semsi->semids[i]); 1142 break; 1143 #endif 1144 #ifdef SYSVSHM 1145 case KERN_SYSVIPC_SHM_INFO: 1146 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1147 break; 1148 #endif 1149 } 1150 buflen -= dssize; 1151 } 1152 } 1153 *sizep -= buflen; 1154 error = copyout(buf, start, *sizep); 1155 /* If copyout succeeded, use return code set earlier. */ 1156 if (error == 0) 1157 error = ret; 1158 if (buf) 1159 free(buf, M_TEMP); 1160 return (error); 1161 } 1162 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1163 1164 static int 1165 sysctl_msgbuf(vwhere, sizep) 1166 void *vwhere; 1167 size_t *sizep; 1168 { 1169 char *where = vwhere; 1170 size_t len, maxlen = *sizep; 1171 long pos; 1172 int error; 1173 1174 /* 1175 * deal with cases where the message buffer has 1176 * become corrupted. 1177 */ 1178 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1179 msgbufenabled = 0; 1180 return (ENXIO); 1181 } 1182 1183 if (where == NULL) { 1184 /* always return full buffer size */ 1185 *sizep = msgbufp->msg_bufs; 1186 return (0); 1187 } 1188 1189 error = 0; 1190 maxlen = min(msgbufp->msg_bufs, maxlen); 1191 pos = msgbufp->msg_bufx; 1192 while (maxlen > 0) { 1193 len = pos == 0 ? msgbufp->msg_bufx : msgbufp->msg_bufs - msgbufp->msg_bufx; 1194 len = min(len, maxlen); 1195 if (len == 0) 1196 break; 1197 error = copyout(&msgbufp->msg_bufc[pos], where, len); 1198 if (error) 1199 break; 1200 where += len; 1201 maxlen -= len; 1202 pos = 0; 1203 } 1204 return (error); 1205 } 1206 1207 /* 1208 * try over estimating by 5 procs 1209 */ 1210 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1211 1212 static int 1213 sysctl_doeproc(name, namelen, vwhere, sizep) 1214 int *name; 1215 u_int namelen; 1216 void *vwhere; 1217 size_t *sizep; 1218 { 1219 struct eproc eproc; 1220 struct kinfo_proc2 kproc2; 1221 struct kinfo_proc *dp; 1222 struct proc *p; 1223 const struct proclist_desc *pd; 1224 char *where, *dp2; 1225 int type, op, arg, elem_size, elem_count; 1226 int buflen, needed, error; 1227 1228 dp = vwhere; 1229 dp2 = where = vwhere; 1230 buflen = where != NULL ? *sizep : 0; 1231 error = needed = 0; 1232 type = name[0]; 1233 1234 if (type == KERN_PROC) { 1235 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1236 return (EINVAL); 1237 op = name[1]; 1238 if (op != KERN_PROC_ALL) 1239 arg = name[2]; 1240 } else { 1241 if (namelen != 5) 1242 return (EINVAL); 1243 op = name[1]; 1244 arg = name[2]; 1245 elem_size = name[3]; 1246 elem_count = name[4]; 1247 } 1248 1249 proclist_lock_read(); 1250 1251 pd = proclists; 1252 again: 1253 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1254 /* 1255 * Skip embryonic processes. 1256 */ 1257 if (p->p_stat == SIDL) 1258 continue; 1259 /* 1260 * TODO - make more efficient (see notes below). 1261 * do by session. 1262 */ 1263 switch (op) { 1264 1265 case KERN_PROC_PID: 1266 /* could do this with just a lookup */ 1267 if (p->p_pid != (pid_t)arg) 1268 continue; 1269 break; 1270 1271 case KERN_PROC_PGRP: 1272 /* could do this by traversing pgrp */ 1273 if (p->p_pgrp->pg_id != (pid_t)arg) 1274 continue; 1275 break; 1276 1277 case KERN_PROC_SESSION: 1278 if (p->p_session->s_sid != (pid_t)arg) 1279 continue; 1280 break; 1281 1282 case KERN_PROC_TTY: 1283 if (arg == KERN_PROC_TTY_REVOKE) { 1284 if ((p->p_flag & P_CONTROLT) == 0 || 1285 p->p_session->s_ttyp == NULL || 1286 p->p_session->s_ttyvp != NULL) 1287 continue; 1288 } else if ((p->p_flag & P_CONTROLT) == 0 || 1289 p->p_session->s_ttyp == NULL) { 1290 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1291 continue; 1292 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1293 continue; 1294 break; 1295 1296 case KERN_PROC_UID: 1297 if (p->p_ucred->cr_uid != (uid_t)arg) 1298 continue; 1299 break; 1300 1301 case KERN_PROC_RUID: 1302 if (p->p_cred->p_ruid != (uid_t)arg) 1303 continue; 1304 break; 1305 1306 case KERN_PROC_GID: 1307 if (p->p_ucred->cr_gid != (uid_t)arg) 1308 continue; 1309 break; 1310 1311 case KERN_PROC_RGID: 1312 if (p->p_cred->p_rgid != (uid_t)arg) 1313 continue; 1314 break; 1315 1316 case KERN_PROC_ALL: 1317 /* allow everything */ 1318 break; 1319 1320 default: 1321 error = EINVAL; 1322 goto cleanup; 1323 } 1324 if (type == KERN_PROC) { 1325 if (buflen >= sizeof(struct kinfo_proc)) { 1326 fill_eproc(p, &eproc); 1327 error = copyout((caddr_t)p, &dp->kp_proc, 1328 sizeof(struct proc)); 1329 if (error) 1330 goto cleanup; 1331 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1332 sizeof(eproc)); 1333 if (error) 1334 goto cleanup; 1335 dp++; 1336 buflen -= sizeof(struct kinfo_proc); 1337 } 1338 needed += sizeof(struct kinfo_proc); 1339 } else { /* KERN_PROC2 */ 1340 if (buflen >= elem_size && elem_count > 0) { 1341 fill_kproc2(p, &kproc2); 1342 /* 1343 * Copy out elem_size, but not larger than 1344 * the size of a struct kinfo_proc2. 1345 */ 1346 error = copyout(&kproc2, dp2, 1347 min(sizeof(kproc2), elem_size)); 1348 if (error) 1349 goto cleanup; 1350 dp2 += elem_size; 1351 buflen -= elem_size; 1352 elem_count--; 1353 } 1354 needed += elem_size; 1355 } 1356 } 1357 pd++; 1358 if (pd->pd_list != NULL) 1359 goto again; 1360 proclist_unlock_read(); 1361 1362 if (where != NULL) { 1363 if (type == KERN_PROC) 1364 *sizep = (caddr_t)dp - where; 1365 else 1366 *sizep = dp2 - where; 1367 if (needed > *sizep) 1368 return (ENOMEM); 1369 } else { 1370 needed += KERN_PROCSLOP; 1371 *sizep = needed; 1372 } 1373 return (0); 1374 cleanup: 1375 proclist_unlock_read(); 1376 return (error); 1377 } 1378 1379 /* 1380 * Fill in an eproc structure for the specified process. 1381 */ 1382 void 1383 fill_eproc(p, ep) 1384 struct proc *p; 1385 struct eproc *ep; 1386 { 1387 struct tty *tp; 1388 1389 ep->e_paddr = p; 1390 ep->e_sess = p->p_session; 1391 ep->e_pcred = *p->p_cred; 1392 ep->e_ucred = *p->p_ucred; 1393 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1394 ep->e_vm.vm_rssize = 0; 1395 ep->e_vm.vm_tsize = 0; 1396 ep->e_vm.vm_dsize = 0; 1397 ep->e_vm.vm_ssize = 0; 1398 /* ep->e_vm.vm_pmap = XXX; */ 1399 } else { 1400 struct vmspace *vm = p->p_vmspace; 1401 1402 ep->e_vm.vm_rssize = vm_resident_count(vm); 1403 ep->e_vm.vm_tsize = vm->vm_tsize; 1404 ep->e_vm.vm_dsize = vm->vm_dsize; 1405 ep->e_vm.vm_ssize = vm->vm_ssize; 1406 } 1407 if (p->p_pptr) 1408 ep->e_ppid = p->p_pptr->p_pid; 1409 else 1410 ep->e_ppid = 0; 1411 ep->e_pgid = p->p_pgrp->pg_id; 1412 ep->e_sid = ep->e_sess->s_sid; 1413 ep->e_jobc = p->p_pgrp->pg_jobc; 1414 if ((p->p_flag & P_CONTROLT) && 1415 (tp = ep->e_sess->s_ttyp)) { 1416 ep->e_tdev = tp->t_dev; 1417 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1418 ep->e_tsess = tp->t_session; 1419 } else 1420 ep->e_tdev = NODEV; 1421 if (p->p_wmesg) 1422 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1423 ep->e_xsize = ep->e_xrssize = 0; 1424 ep->e_xccount = ep->e_xswrss = 0; 1425 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1426 if (SESS_LEADER(p)) 1427 ep->e_flag |= EPROC_SLEADER; 1428 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1429 } 1430 1431 /* 1432 * Fill in an eproc structure for the specified process. 1433 */ 1434 static void 1435 fill_kproc2(p, ki) 1436 struct proc *p; 1437 struct kinfo_proc2 *ki; 1438 { 1439 struct tty *tp; 1440 1441 memset(ki, 0, sizeof(*ki)); 1442 1443 ki->p_forw = PTRTOINT64(p->p_forw); 1444 ki->p_back = PTRTOINT64(p->p_back); 1445 ki->p_paddr = PTRTOINT64(p); 1446 1447 ki->p_addr = PTRTOINT64(p->p_addr); 1448 ki->p_fd = PTRTOINT64(p->p_fd); 1449 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1450 ki->p_stats = PTRTOINT64(p->p_stats); 1451 ki->p_limit = PTRTOINT64(p->p_limit); 1452 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1453 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1454 ki->p_sess = PTRTOINT64(p->p_session); 1455 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1456 ki->p_ru = PTRTOINT64(p->p_ru); 1457 1458 ki->p_eflag = 0; 1459 ki->p_exitsig = p->p_exitsig; 1460 ki->p_flag = p->p_flag; 1461 1462 ki->p_pid = p->p_pid; 1463 if (p->p_pptr) 1464 ki->p_ppid = p->p_pptr->p_pid; 1465 else 1466 ki->p_ppid = 0; 1467 ki->p_sid = p->p_session->s_sid; 1468 ki->p__pgid = p->p_pgrp->pg_id; 1469 1470 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1471 1472 ki->p_uid = p->p_ucred->cr_uid; 1473 ki->p_ruid = p->p_cred->p_ruid; 1474 ki->p_gid = p->p_ucred->cr_gid; 1475 ki->p_rgid = p->p_cred->p_rgid; 1476 1477 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1478 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1479 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1480 1481 ki->p_jobc = p->p_pgrp->pg_jobc; 1482 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1483 ki->p_tdev = tp->t_dev; 1484 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1485 ki->p_tsess = PTRTOINT64(tp->t_session); 1486 } else { 1487 ki->p_tdev = NODEV; 1488 } 1489 1490 ki->p_estcpu = p->p_estcpu; 1491 ki->p_rtime_sec = p->p_rtime.tv_sec; 1492 ki->p_rtime_usec = p->p_rtime.tv_usec; 1493 ki->p_cpticks = p->p_cpticks; 1494 ki->p_pctcpu = p->p_pctcpu; 1495 ki->p_swtime = p->p_swtime; 1496 ki->p_slptime = p->p_slptime; 1497 if (p->p_stat == SONPROC) { 1498 KDASSERT(p->p_cpu != NULL); 1499 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1500 } else 1501 ki->p_schedflags = 0; 1502 1503 ki->p_uticks = p->p_uticks; 1504 ki->p_sticks = p->p_sticks; 1505 ki->p_iticks = p->p_iticks; 1506 1507 ki->p_tracep = PTRTOINT64(p->p_tracep); 1508 ki->p_traceflag = p->p_traceflag; 1509 1510 ki->p_holdcnt = p->p_holdcnt; 1511 1512 memcpy(&ki->p_siglist, &p->p_siglist, sizeof(ki_sigset_t)); 1513 memcpy(&ki->p_sigmask, &p->p_sigmask, sizeof(ki_sigset_t)); 1514 memcpy(&ki->p_sigignore, &p->p_sigignore, sizeof(ki_sigset_t)); 1515 memcpy(&ki->p_sigcatch, &p->p_sigcatch, sizeof(ki_sigset_t)); 1516 1517 ki->p_stat = p->p_stat; 1518 ki->p_priority = p->p_priority; 1519 ki->p_usrpri = p->p_usrpri; 1520 ki->p_nice = p->p_nice; 1521 1522 ki->p_xstat = p->p_xstat; 1523 ki->p_acflag = p->p_acflag; 1524 1525 strncpy(ki->p_comm, p->p_comm, 1526 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1527 1528 if (p->p_wmesg) 1529 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1530 ki->p_wchan = PTRTOINT64(p->p_wchan); 1531 1532 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1533 1534 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1535 ki->p_vm_rssize = 0; 1536 ki->p_vm_tsize = 0; 1537 ki->p_vm_dsize = 0; 1538 ki->p_vm_ssize = 0; 1539 } else { 1540 struct vmspace *vm = p->p_vmspace; 1541 1542 ki->p_vm_rssize = vm_resident_count(vm); 1543 ki->p_vm_tsize = vm->vm_tsize; 1544 ki->p_vm_dsize = vm->vm_dsize; 1545 ki->p_vm_ssize = vm->vm_ssize; 1546 } 1547 1548 if (p->p_session->s_ttyvp) 1549 ki->p_eflag |= EPROC_CTTY; 1550 if (SESS_LEADER(p)) 1551 ki->p_eflag |= EPROC_SLEADER; 1552 1553 /* XXX Is this double check necessary? */ 1554 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1555 ki->p_uvalid = 0; 1556 } else { 1557 ki->p_uvalid = 1; 1558 1559 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1560 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1561 1562 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1563 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1564 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1565 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1566 1567 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1568 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1569 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1570 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1571 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1572 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1573 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1574 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1575 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1576 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1577 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1578 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1579 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1580 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1581 1582 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1583 p->p_stats->p_cru.ru_stime.tv_sec; 1584 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1585 p->p_stats->p_cru.ru_stime.tv_usec; 1586 } 1587 } 1588 1589 int 1590 sysctl_procargs(name, namelen, where, sizep, up) 1591 int *name; 1592 u_int namelen; 1593 void *where; 1594 size_t *sizep; 1595 struct proc *up; 1596 { 1597 struct ps_strings pss; 1598 struct proc *p; 1599 size_t len, upper_bound, xlen; 1600 struct uio auio; 1601 struct iovec aiov; 1602 vaddr_t argv; 1603 pid_t pid; 1604 int nargv, type, error, i; 1605 char *arg; 1606 char *tmp; 1607 1608 if (namelen != 2) 1609 return (EINVAL); 1610 pid = name[0]; 1611 type = name[1]; 1612 1613 switch (type) { 1614 case KERN_PROC_ARGV: 1615 case KERN_PROC_NARGV: 1616 case KERN_PROC_ENV: 1617 case KERN_PROC_NENV: 1618 /* ok */ 1619 break; 1620 default: 1621 return (EINVAL); 1622 } 1623 1624 /* check pid */ 1625 if ((p = pfind(pid)) == NULL) 1626 return (EINVAL); 1627 1628 /* only root or same user change look at the environment */ 1629 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1630 if (up->p_ucred->cr_uid != 0) { 1631 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1632 up->p_cred->p_ruid != p->p_cred->p_svuid) 1633 return (EPERM); 1634 } 1635 } 1636 1637 if (sizep != NULL && where == NULL) { 1638 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1639 *sizep = sizeof (int); 1640 else 1641 *sizep = ARG_MAX; /* XXX XXX XXX */ 1642 return (0); 1643 } 1644 if (where == NULL || sizep == NULL) 1645 return (EINVAL); 1646 1647 /* 1648 * Zombies don't have a stack, so we can't read their psstrings. 1649 * System processes also don't have a user stack. 1650 */ 1651 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1652 return (EINVAL); 1653 1654 /* 1655 * Lock the process down in memory. 1656 */ 1657 /* XXXCDC: how should locking work here? */ 1658 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1659 return (EFAULT); 1660 PHOLD(p); 1661 p->p_vmspace->vm_refcnt++; /* XXX */ 1662 1663 /* 1664 * Allocate a temporary buffer to hold the arguments. 1665 */ 1666 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1667 1668 /* 1669 * Read in the ps_strings structure. 1670 */ 1671 aiov.iov_base = &pss; 1672 aiov.iov_len = sizeof(pss); 1673 auio.uio_iov = &aiov; 1674 auio.uio_iovcnt = 1; 1675 auio.uio_offset = (vaddr_t)p->p_psstr; 1676 auio.uio_resid = sizeof(pss); 1677 auio.uio_segflg = UIO_SYSSPACE; 1678 auio.uio_rw = UIO_READ; 1679 auio.uio_procp = NULL; 1680 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1681 if (error) 1682 goto done; 1683 1684 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1685 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1686 else 1687 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1688 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1689 error = copyout(&nargv, where, sizeof(nargv)); 1690 *sizep = sizeof(nargv); 1691 goto done; 1692 } 1693 /* 1694 * Now read the address of the argument vector. 1695 */ 1696 switch (type) { 1697 case KERN_PROC_ARGV: 1698 /* XXX compat32 stuff here */ 1699 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1700 break; 1701 case KERN_PROC_ENV: 1702 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1703 break; 1704 default: 1705 return (EINVAL); 1706 } 1707 auio.uio_offset = (off_t)(long)tmp; 1708 aiov.iov_base = &argv; 1709 aiov.iov_len = sizeof(argv); 1710 auio.uio_iov = &aiov; 1711 auio.uio_iovcnt = 1; 1712 auio.uio_resid = sizeof(argv); 1713 auio.uio_segflg = UIO_SYSSPACE; 1714 auio.uio_rw = UIO_READ; 1715 auio.uio_procp = NULL; 1716 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1717 if (error) 1718 goto done; 1719 1720 /* 1721 * Now copy in the actual argument vector, one page at a time, 1722 * since we don't know how long the vector is (though, we do 1723 * know how many NUL-terminated strings are in the vector). 1724 */ 1725 len = 0; 1726 upper_bound = *sizep; 1727 for (; nargv != 0 && len < upper_bound; len += xlen) { 1728 aiov.iov_base = arg; 1729 aiov.iov_len = PAGE_SIZE; 1730 auio.uio_iov = &aiov; 1731 auio.uio_iovcnt = 1; 1732 auio.uio_offset = argv + len; 1733 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1734 auio.uio_resid = xlen; 1735 auio.uio_segflg = UIO_SYSSPACE; 1736 auio.uio_rw = UIO_READ; 1737 auio.uio_procp = NULL; 1738 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1739 if (error) 1740 goto done; 1741 1742 for (i = 0; i < xlen && nargv != 0; i++) { 1743 if (arg[i] == '\0') 1744 nargv--; /* one full string */ 1745 } 1746 1747 /* make sure we don't copyout past the end of the user's buffer */ 1748 if (len + i > upper_bound) 1749 i = upper_bound - len; 1750 1751 error = copyout(arg, (char *)where + len, i); 1752 if (error) 1753 break; 1754 1755 if (nargv == 0) { 1756 len += i; 1757 break; 1758 } 1759 } 1760 *sizep = len; 1761 1762 done: 1763 PRELE(p); 1764 uvmspace_free(p->p_vmspace); 1765 1766 free(arg, M_TEMP); 1767 return (error); 1768 } 1769
Indexes created Tue Sep 30 11:09:46 GMT 2025