kern_sysctl.c revision 1.90
1 /* $NetBSD: kern_sysctl.c,v 1.90 2001/06/21 19:08:38 jdolecek 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_new_pipe.h" 49 #include "opt_sysv.h" 50 #include "pty.h" 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/kernel.h> 55 #include <sys/buf.h> 56 #include <sys/device.h> 57 #include <sys/disklabel.h> 58 #include <sys/dkstat.h> 59 #include <sys/exec.h> 60 #include <sys/file.h> 61 #include <sys/ioctl.h> 62 #include <sys/malloc.h> 63 #include <sys/mount.h> 64 #include <sys/msgbuf.h> 65 #include <sys/pool.h> 66 #include <sys/proc.h> 67 #include <sys/resource.h> 68 #include <sys/resourcevar.h> 69 #include <sys/syscallargs.h> 70 #include <sys/tty.h> 71 #include <sys/unistd.h> 72 #include <sys/vnode.h> 73 #define __SYSCTL_PRIVATE 74 #include <sys/sysctl.h> 75 #include <sys/lock.h> 76 77 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 78 #include <sys/ipc.h> 79 #endif 80 #ifdef SYSVMSG 81 #include <sys/msg.h> 82 #endif 83 #ifdef SYSVSEM 84 #include <sys/sem.h> 85 #endif 86 #ifdef SYSVSHM 87 #include <sys/shm.h> 88 #endif 89 90 #include <dev/cons.h> 91 92 #if defined(DDB) 93 #include <ddb/ddbvar.h> 94 #endif 95 96 #ifdef NEW_PIPE 97 #include <sys/pipe.h> 98 #endif 99 100 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 101 102 static int sysctl_file __P((void *, size_t *)); 103 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 104 static int sysctl_sysvipc __P((int *, u_int, void *, size_t *)); 105 #endif 106 static int sysctl_msgbuf __P((void *, size_t *)); 107 static int sysctl_doeproc __P((int *, u_int, void *, size_t *)); 108 #ifdef MULTIPROCESSOR 109 static int sysctl_docptime __P((void *, size_t *, void *)); 110 static int sysctl_ncpus __P((void)); 111 #endif 112 static void fill_kproc2 __P((struct proc *, struct kinfo_proc2 *)); 113 static int sysctl_procargs __P((int *, u_int, void *, size_t *, struct proc *)); 114 #if NPTY > 0 115 static int sysctl_pty __P((void *, size_t *, void *, size_t)); 116 #endif 117 118 /* 119 * The `sysctl_memlock' is intended to keep too many processes from 120 * locking down memory by doing sysctls at once. Whether or not this 121 * is really a good idea to worry about it probably a subject of some 122 * debate. 123 */ 124 struct lock sysctl_memlock; 125 126 void 127 sysctl_init(void) 128 { 129 130 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 131 } 132 133 int 134 sys___sysctl(p, v, retval) 135 struct proc *p; 136 void *v; 137 register_t *retval; 138 { 139 struct sys___sysctl_args /* { 140 syscallarg(int *) name; 141 syscallarg(u_int) namelen; 142 syscallarg(void *) old; 143 syscallarg(size_t *) oldlenp; 144 syscallarg(void *) new; 145 syscallarg(size_t) newlen; 146 } */ *uap = v; 147 int error; 148 size_t savelen = 0, oldlen = 0; 149 sysctlfn *fn; 150 int name[CTL_MAXNAME]; 151 size_t *oldlenp; 152 153 /* 154 * all top-level sysctl names are non-terminal 155 */ 156 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 157 return (EINVAL); 158 error = copyin(SCARG(uap, name), &name, 159 SCARG(uap, namelen) * sizeof(int)); 160 if (error) 161 return (error); 162 163 /* 164 * For all but CTL_PROC, must be root to change a value. 165 * For CTL_PROC, must be root, or owner of the proc (and not suid), 166 * this is checked in proc_sysctl() (once we know the targer proc). 167 */ 168 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 169 (error = suser(p->p_ucred, &p->p_acflag))) 170 return error; 171 172 switch (name[0]) { 173 case CTL_KERN: 174 fn = kern_sysctl; 175 break; 176 case CTL_HW: 177 fn = hw_sysctl; 178 break; 179 case CTL_VM: 180 fn = uvm_sysctl; 181 break; 182 case CTL_NET: 183 fn = net_sysctl; 184 break; 185 case CTL_VFS: 186 fn = vfs_sysctl; 187 break; 188 case CTL_MACHDEP: 189 fn = cpu_sysctl; 190 break; 191 #ifdef DEBUG 192 case CTL_DEBUG: 193 fn = debug_sysctl; 194 break; 195 #endif 196 #ifdef DDB 197 case CTL_DDB: 198 fn = ddb_sysctl; 199 break; 200 #endif 201 case CTL_PROC: 202 fn = proc_sysctl; 203 break; 204 default: 205 return (EOPNOTSUPP); 206 } 207 208 /* 209 * XXX Hey, we wire `old', but what about `new'? 210 */ 211 212 oldlenp = SCARG(uap, oldlenp); 213 if (oldlenp) { 214 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 215 return (error); 216 oldlenp = &oldlen; 217 } 218 if (SCARG(uap, old) != NULL) { 219 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 220 if (error) 221 return (error); 222 error = uvm_vslock(p, SCARG(uap, old), oldlen, 223 VM_PROT_READ|VM_PROT_WRITE); 224 if (error) { 225 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 226 return error; 227 } 228 savelen = oldlen; 229 } 230 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 231 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 232 if (SCARG(uap, old) != NULL) { 233 uvm_vsunlock(p, SCARG(uap, old), savelen); 234 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 235 } 236 if (error) 237 return (error); 238 if (SCARG(uap, oldlenp)) 239 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 240 return (error); 241 } 242 243 /* 244 * Attributes stored in the kernel. 245 */ 246 char hostname[MAXHOSTNAMELEN]; 247 int hostnamelen; 248 249 char domainname[MAXHOSTNAMELEN]; 250 int domainnamelen; 251 252 long hostid; 253 254 #ifdef INSECURE 255 int securelevel = -1; 256 #else 257 int securelevel = 0; 258 #endif 259 260 #ifndef DEFCORENAME 261 #define DEFCORENAME "%n.core" 262 #endif 263 char defcorename[MAXPATHLEN] = DEFCORENAME; 264 int defcorenamelen = sizeof(DEFCORENAME); 265 266 extern int kern_logsigexit; 267 extern fixpt_t ccpu; 268 269 #ifndef MULTIPROCESSOR 270 #define sysctl_ncpus() 1 271 #endif 272 273 #ifdef MULTIPROCESSOR 274 275 #ifndef CPU_INFO_FOREACH 276 #define CPU_INFO_ITERATOR int 277 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 278 #endif 279 280 static int 281 sysctl_docptime(oldp, oldlenp, newp) 282 void *oldp; 283 size_t *oldlenp; 284 void *newp; 285 { 286 u_int64_t cp_time[CPUSTATES]; 287 int i; 288 struct cpu_info *ci; 289 CPU_INFO_ITERATOR cii; 290 291 for (i=0; i<CPUSTATES; i++) 292 cp_time[i] = 0; 293 294 for (CPU_INFO_FOREACH(cii, ci)) { 295 for (i=0; i<CPUSTATES; i++) 296 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 297 } 298 return (sysctl_rdstruct(oldp, oldlenp, newp, 299 cp_time, sizeof(cp_time))); 300 } 301 302 static int 303 sysctl_ncpus(void) 304 { 305 struct cpu_info *ci; 306 CPU_INFO_ITERATOR cii; 307 308 int ncpus = 0; 309 for (CPU_INFO_FOREACH(cii, ci)) 310 ncpus++; 311 return ncpus; 312 } 313 314 #endif 315 316 /* 317 * kernel related system variables. 318 */ 319 int 320 kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 321 int *name; 322 u_int namelen; 323 void *oldp; 324 size_t *oldlenp; 325 void *newp; 326 size_t newlen; 327 struct proc *p; 328 { 329 int error, level, inthostid; 330 int old_autonicetime; 331 int old_vnodes; 332 dev_t consdev; 333 334 /* All sysctl names at this level, except for a few, are terminal. */ 335 switch (name[0]) { 336 case KERN_PROC: 337 case KERN_PROC2: 338 case KERN_PROF: 339 case KERN_MBUF: 340 case KERN_PROC_ARGS: 341 case KERN_SYSVIPC_INFO: 342 case KERN_PIPE: 343 /* Not terminal. */ 344 break; 345 default: 346 if (namelen != 1) 347 return (ENOTDIR); /* overloaded */ 348 } 349 350 switch (name[0]) { 351 case KERN_OSTYPE: 352 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 353 case KERN_OSRELEASE: 354 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 355 case KERN_OSREV: 356 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 357 case KERN_VERSION: 358 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 359 case KERN_MAXVNODES: 360 old_vnodes = desiredvnodes; 361 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 362 if (old_vnodes > desiredvnodes) { 363 desiredvnodes = old_vnodes; 364 return (EINVAL); 365 } 366 return (error); 367 case KERN_MAXPROC: 368 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 369 case KERN_MAXFILES: 370 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 371 case KERN_ARGMAX: 372 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 373 case KERN_SECURELVL: 374 level = securelevel; 375 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 376 newp == NULL) 377 return (error); 378 if (level < securelevel && p->p_pid != 1) 379 return (EPERM); 380 securelevel = level; 381 return (0); 382 case KERN_HOSTNAME: 383 error = sysctl_string(oldp, oldlenp, newp, newlen, 384 hostname, sizeof(hostname)); 385 if (newp && !error) 386 hostnamelen = newlen; 387 return (error); 388 case KERN_DOMAINNAME: 389 error = sysctl_string(oldp, oldlenp, newp, newlen, 390 domainname, sizeof(domainname)); 391 if (newp && !error) 392 domainnamelen = newlen; 393 return (error); 394 case KERN_HOSTID: 395 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 396 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 397 hostid = inthostid; 398 return (error); 399 case KERN_CLOCKRATE: 400 return (sysctl_clockrate(oldp, oldlenp)); 401 case KERN_BOOTTIME: 402 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 403 sizeof(struct timeval))); 404 case KERN_VNODE: 405 return (sysctl_vnode(oldp, oldlenp, p)); 406 case KERN_PROC: 407 case KERN_PROC2: 408 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 409 case KERN_PROC_ARGS: 410 return (sysctl_procargs(name + 1, namelen - 1, 411 oldp, oldlenp, p)); 412 case KERN_FILE: 413 return (sysctl_file(oldp, oldlenp)); 414 #ifdef GPROF 415 case KERN_PROF: 416 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 417 newp, newlen)); 418 #endif 419 case KERN_POSIX1: 420 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 421 case KERN_NGROUPS: 422 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 423 case KERN_JOB_CONTROL: 424 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 425 case KERN_SAVED_IDS: 426 #ifdef _POSIX_SAVED_IDS 427 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 428 #else 429 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 430 #endif 431 case KERN_MAXPARTITIONS: 432 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 433 case KERN_RAWPARTITION: 434 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 435 #ifdef NTP 436 case KERN_NTPTIME: 437 return (sysctl_ntptime(oldp, oldlenp)); 438 #endif 439 case KERN_AUTONICETIME: 440 old_autonicetime = autonicetime; 441 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 442 if (autonicetime < 0) 443 autonicetime = old_autonicetime; 444 return (error); 445 case KERN_AUTONICEVAL: 446 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 447 if (autoniceval < PRIO_MIN) 448 autoniceval = PRIO_MIN; 449 if (autoniceval > PRIO_MAX) 450 autoniceval = PRIO_MAX; 451 return (error); 452 case KERN_RTC_OFFSET: 453 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 454 case KERN_ROOT_DEVICE: 455 return (sysctl_rdstring(oldp, oldlenp, newp, 456 root_device->dv_xname)); 457 case KERN_MSGBUFSIZE: 458 /* 459 * deal with cases where the message buffer has 460 * become corrupted. 461 */ 462 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 463 msgbufenabled = 0; 464 return (ENXIO); 465 } 466 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 467 case KERN_FSYNC: 468 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 469 case KERN_SYSVMSG: 470 #ifdef SYSVMSG 471 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 472 #else 473 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 474 #endif 475 case KERN_SYSVSEM: 476 #ifdef SYSVSEM 477 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 478 #else 479 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 480 #endif 481 case KERN_SYSVSHM: 482 #ifdef SYSVSHM 483 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 484 #else 485 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 486 #endif 487 case KERN_DEFCORENAME: 488 if (newp && newlen < 1) 489 return (EINVAL); 490 error = sysctl_string(oldp, oldlenp, newp, newlen, 491 defcorename, sizeof(defcorename)); 492 if (newp && !error) 493 defcorenamelen = newlen; 494 return (error); 495 case KERN_SYNCHRONIZED_IO: 496 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 497 case KERN_IOV_MAX: 498 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 499 case KERN_MBUF: 500 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 501 newp, newlen)); 502 case KERN_MAPPED_FILES: 503 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 504 case KERN_MEMLOCK: 505 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 506 case KERN_MEMLOCK_RANGE: 507 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 508 case KERN_MEMORY_PROTECTION: 509 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 510 case KERN_LOGIN_NAME_MAX: 511 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 512 case KERN_LOGSIGEXIT: 513 return (sysctl_int(oldp, oldlenp, newp, newlen, 514 &kern_logsigexit)); 515 case KERN_FSCALE: 516 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 517 case KERN_CCPU: 518 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 519 case KERN_CP_TIME: 520 #ifndef MULTIPROCESSOR 521 return (sysctl_rdstruct(oldp, oldlenp, newp, 522 curcpu()->ci_schedstate.spc_cp_time, 523 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 524 #else 525 return (sysctl_docptime(oldp, oldlenp, newp)); 526 #endif 527 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 528 case KERN_SYSVIPC_INFO: 529 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 530 #endif 531 case KERN_MSGBUF: 532 return (sysctl_msgbuf(oldp, oldlenp)); 533 case KERN_CONSDEV: 534 if (cn_tab != NULL) 535 consdev = cn_tab->cn_dev; 536 else 537 consdev = NODEV; 538 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 539 sizeof consdev)); 540 #if NPTY > 0 541 case KERN_MAXPTYS: 542 return sysctl_pty(oldp, oldlenp, newp, newlen); 543 #endif 544 #ifdef NEW_PIPE 545 case KERN_PIPE: 546 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 547 newp, newlen)); 548 #endif 549 default: 550 return (EOPNOTSUPP); 551 } 552 /* NOTREACHED */ 553 } 554 555 /* 556 * hardware related system variables. 557 */ 558 int 559 hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 560 int *name; 561 u_int namelen; 562 void *oldp; 563 size_t *oldlenp; 564 void *newp; 565 size_t newlen; 566 struct proc *p; 567 { 568 569 /* all sysctl names at this level are terminal */ 570 if (namelen != 1) 571 return (ENOTDIR); /* overloaded */ 572 573 switch (name[0]) { 574 case HW_MACHINE: 575 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 576 case HW_MACHINE_ARCH: 577 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 578 case HW_MODEL: 579 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 580 case HW_NCPU: 581 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 582 case HW_BYTEORDER: 583 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 584 case HW_PHYSMEM: 585 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 586 case HW_USERMEM: 587 return (sysctl_rdint(oldp, oldlenp, newp, 588 ctob(physmem - uvmexp.wired))); 589 case HW_PAGESIZE: 590 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 591 case HW_ALIGNBYTES: 592 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 593 case HW_CNMAGIC: { 594 char magic[CNS_LEN]; 595 int error; 596 597 if (oldp) 598 cn_get_magic(magic, CNS_LEN); 599 error = sysctl_string(oldp, oldlenp, newp, newlen, 600 magic, sizeof(magic)); 601 if (newp && !error) { 602 error = cn_set_magic(magic); 603 } 604 return (error); 605 } 606 default: 607 return (EOPNOTSUPP); 608 } 609 /* NOTREACHED */ 610 } 611 612 #ifdef DEBUG 613 /* 614 * Debugging related system variables. 615 */ 616 struct ctldebug debug0, debug1, debug2, debug3, debug4; 617 struct ctldebug debug5, debug6, debug7, debug8, debug9; 618 struct ctldebug debug10, debug11, debug12, debug13, debug14; 619 struct ctldebug debug15, debug16, debug17, debug18, debug19; 620 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 621 &debug0, &debug1, &debug2, &debug3, &debug4, 622 &debug5, &debug6, &debug7, &debug8, &debug9, 623 &debug10, &debug11, &debug12, &debug13, &debug14, 624 &debug15, &debug16, &debug17, &debug18, &debug19, 625 }; 626 int 627 debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 628 int *name; 629 u_int namelen; 630 void *oldp; 631 size_t *oldlenp; 632 void *newp; 633 size_t newlen; 634 struct proc *p; 635 { 636 struct ctldebug *cdp; 637 638 /* all sysctl names at this level are name and field */ 639 if (namelen != 2) 640 return (ENOTDIR); /* overloaded */ 641 cdp = debugvars[name[0]]; 642 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 643 return (EOPNOTSUPP); 644 switch (name[1]) { 645 case CTL_DEBUG_NAME: 646 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 647 case CTL_DEBUG_VALUE: 648 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 649 default: 650 return (EOPNOTSUPP); 651 } 652 /* NOTREACHED */ 653 } 654 #endif /* DEBUG */ 655 656 int 657 proc_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 658 int *name; 659 u_int namelen; 660 void *oldp; 661 size_t *oldlenp; 662 void *newp; 663 size_t newlen; 664 struct proc *p; 665 { 666 struct proc *ptmp = NULL; 667 const struct proclist_desc *pd; 668 int error = 0; 669 struct rlimit alim; 670 struct plimit *newplim; 671 char *tmps = NULL; 672 int i, curlen, len; 673 674 if (namelen < 2) 675 return EINVAL; 676 677 if (name[0] == PROC_CURPROC) { 678 ptmp = p; 679 } else { 680 proclist_lock_read(); 681 for (pd = proclists; pd->pd_list != NULL; pd++) { 682 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 683 ptmp = LIST_NEXT(ptmp, p_list)) { 684 /* Skip embryonic processes. */ 685 if (ptmp->p_stat == SIDL) 686 continue; 687 if (ptmp->p_pid == (pid_t)name[0]) 688 break; 689 } 690 if (ptmp != NULL) 691 break; 692 } 693 proclist_unlock_read(); 694 if (ptmp == NULL) 695 return(ESRCH); 696 if (p->p_ucred->cr_uid != 0) { 697 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 698 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 699 return EPERM; 700 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 701 return EPERM; /* sgid proc */ 702 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 703 if (p->p_ucred->cr_groups[i] == 704 ptmp->p_cred->p_rgid) 705 break; 706 } 707 if (i == p->p_ucred->cr_ngroups) 708 return EPERM; 709 } 710 } 711 if (name[1] == PROC_PID_CORENAME) { 712 if (namelen != 2) 713 return EINVAL; 714 /* 715 * Can't use sysctl_string() here because we may malloc a new 716 * area during the process, so we have to do it by hand. 717 */ 718 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 719 if (oldlenp && *oldlenp < curlen) { 720 if (!oldp) 721 *oldlenp = curlen; 722 return (ENOMEM); 723 } 724 if (newp) { 725 if (securelevel > 2) 726 return EPERM; 727 if (newlen > MAXPATHLEN) 728 return ENAMETOOLONG; 729 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 730 if (tmps == NULL) 731 return ENOMEM; 732 error = copyin(newp, tmps, newlen + 1); 733 tmps[newlen] = '\0'; 734 if (error) 735 goto cleanup; 736 /* Enforce to be either 'core' for end with '.core' */ 737 if (newlen < 4) { /* c.o.r.e */ 738 error = EINVAL; 739 goto cleanup; 740 } 741 len = newlen - 4; 742 if (len > 0) { 743 if (tmps[len - 1] != '.' && 744 tmps[len - 1] != '/') { 745 error = EINVAL; 746 goto cleanup; 747 } 748 } 749 if (strcmp(&tmps[len], "core") != 0) { 750 error = EINVAL; 751 goto cleanup; 752 } 753 } 754 if (oldp && oldlenp) { 755 *oldlenp = curlen; 756 error = copyout(ptmp->p_limit->pl_corename, oldp, 757 curlen); 758 } 759 if (newp && error == 0) { 760 /* if the 2 strings are identical, don't limcopy() */ 761 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 762 error = 0; 763 goto cleanup; 764 } 765 if (ptmp->p_limit->p_refcnt > 1 && 766 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 767 newplim = limcopy(ptmp->p_limit); 768 limfree(ptmp->p_limit); 769 ptmp->p_limit = newplim; 770 } else if (ptmp->p_limit->pl_corename != defcorename) { 771 free(ptmp->p_limit->pl_corename, M_TEMP); 772 } 773 ptmp->p_limit->pl_corename = tmps; 774 return (0); 775 } 776 cleanup: 777 if (tmps) 778 free(tmps, M_TEMP); 779 return (error); 780 } 781 if (name[1] == PROC_PID_LIMIT) { 782 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 783 return EINVAL; 784 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 785 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 786 error = sysctl_quad(oldp, oldlenp, newp, newlen, 787 &alim.rlim_max); 788 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 789 error = sysctl_quad(oldp, oldlenp, newp, newlen, 790 &alim.rlim_cur); 791 else 792 error = EINVAL; 793 794 if (error) 795 return error; 796 797 if (newp) 798 error = dosetrlimit(ptmp, p->p_cred, 799 name[2] - 1, &alim); 800 return error; 801 } 802 return (EINVAL); 803 } 804 805 /* 806 * Convenience macros. 807 */ 808 809 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 810 if (oldlenp) { \ 811 if (!oldp) \ 812 *oldlenp = len; \ 813 else { \ 814 if (*oldlenp < len) \ 815 return(ENOMEM); \ 816 *oldlenp = len; \ 817 error = copyout((caddr_t)valp, oldp, len); \ 818 } \ 819 } 820 821 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 822 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 823 824 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 825 if (newp && newlen != len) \ 826 return (EINVAL); 827 828 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 829 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 830 831 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 832 if (error == 0 && newp) \ 833 error = copyin(newp, valp, len); 834 835 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 836 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 837 838 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 839 if (oldlenp) { \ 840 len = strlen(str) + 1; \ 841 if (!oldp) \ 842 *oldlenp = len; \ 843 else { \ 844 if (*oldlenp < len) { \ 845 err2 = ENOMEM; \ 846 len = *oldlenp; \ 847 } else \ 848 *oldlenp = len; \ 849 error = copyout(str, oldp, len);\ 850 if (error == 0) \ 851 error = err2; \ 852 } \ 853 } 854 855 /* 856 * Validate parameters and get old / set new parameters 857 * for an integer-valued sysctl function. 858 */ 859 int 860 sysctl_int(oldp, oldlenp, newp, newlen, valp) 861 void *oldp; 862 size_t *oldlenp; 863 void *newp; 864 size_t newlen; 865 int *valp; 866 { 867 int error = 0; 868 869 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 870 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 871 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 872 873 return (error); 874 } 875 876 877 /* 878 * As above, but read-only. 879 */ 880 int 881 sysctl_rdint(oldp, oldlenp, newp, val) 882 void *oldp; 883 size_t *oldlenp; 884 void *newp; 885 int val; 886 { 887 int error = 0; 888 889 if (newp) 890 return (EPERM); 891 892 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 893 894 return (error); 895 } 896 897 /* 898 * Validate parameters and get old / set new parameters 899 * for an quad-valued sysctl function. 900 */ 901 int 902 sysctl_quad(oldp, oldlenp, newp, newlen, valp) 903 void *oldp; 904 size_t *oldlenp; 905 void *newp; 906 size_t newlen; 907 quad_t *valp; 908 { 909 int error = 0; 910 911 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 912 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 913 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 914 915 return (error); 916 } 917 918 /* 919 * As above, but read-only. 920 */ 921 int 922 sysctl_rdquad(oldp, oldlenp, newp, val) 923 void *oldp; 924 size_t *oldlenp; 925 void *newp; 926 quad_t val; 927 { 928 int error = 0; 929 930 if (newp) 931 return (EPERM); 932 933 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 934 935 return (error); 936 } 937 938 /* 939 * Validate parameters and get old / set new parameters 940 * for a string-valued sysctl function. 941 */ 942 int 943 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 944 void *oldp; 945 size_t *oldlenp; 946 void *newp; 947 size_t newlen; 948 char *str; 949 int maxlen; 950 { 951 int len, error = 0, err2 = 0; 952 953 if (newp && newlen >= maxlen) 954 return (EINVAL); 955 956 SYSCTL_STRING_CORE(oldp, oldlenp, str); 957 958 if (error == 0 && newp) { 959 error = copyin(newp, str, newlen); 960 str[newlen] = 0; 961 } 962 return (error); 963 } 964 965 /* 966 * As above, but read-only. 967 */ 968 int 969 sysctl_rdstring(oldp, oldlenp, newp, str) 970 void *oldp; 971 size_t *oldlenp; 972 void *newp; 973 const char *str; 974 { 975 int len, error = 0, err2 = 0; 976 977 if (newp) 978 return (EPERM); 979 980 SYSCTL_STRING_CORE(oldp, oldlenp, str); 981 982 return (error); 983 } 984 985 /* 986 * Validate parameters and get old / set new parameters 987 * for a structure oriented sysctl function. 988 */ 989 int 990 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 991 void *oldp; 992 size_t *oldlenp; 993 void *newp; 994 size_t newlen; 995 void *sp; 996 int len; 997 { 998 int error = 0; 999 1000 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1001 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1002 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1003 1004 return (error); 1005 } 1006 1007 /* 1008 * Validate parameters and get old parameters 1009 * for a structure oriented sysctl function. 1010 */ 1011 int 1012 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 1013 void *oldp; 1014 size_t *oldlenp; 1015 void *newp; 1016 const void *sp; 1017 int len; 1018 { 1019 int error = 0; 1020 1021 if (newp) 1022 return (EPERM); 1023 1024 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1025 1026 return (error); 1027 } 1028 1029 /* 1030 * As above, but can return a truncated result. 1031 */ 1032 int 1033 sysctl_rdminstruct(oldp, oldlenp, newp, sp, len) 1034 void *oldp; 1035 size_t *oldlenp; 1036 void *newp; 1037 const void *sp; 1038 int len; 1039 { 1040 int error = 0; 1041 1042 if (newp) 1043 return (EPERM); 1044 1045 len = min(*oldlenp, len); 1046 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1047 1048 return (error); 1049 } 1050 1051 /* 1052 * Get file structures. 1053 */ 1054 static int 1055 sysctl_file(vwhere, sizep) 1056 void *vwhere; 1057 size_t *sizep; 1058 { 1059 int buflen, error; 1060 struct file *fp; 1061 char *start, *where; 1062 1063 start = where = vwhere; 1064 buflen = *sizep; 1065 if (where == NULL) { 1066 /* 1067 * overestimate by 10 files 1068 */ 1069 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1070 return (0); 1071 } 1072 1073 /* 1074 * first copyout filehead 1075 */ 1076 if (buflen < sizeof(filehead)) { 1077 *sizep = 0; 1078 return (0); 1079 } 1080 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1081 if (error) 1082 return (error); 1083 buflen -= sizeof(filehead); 1084 where += sizeof(filehead); 1085 1086 /* 1087 * followed by an array of file structures 1088 */ 1089 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1090 if (buflen < sizeof(struct file)) { 1091 *sizep = where - start; 1092 return (ENOMEM); 1093 } 1094 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1095 if (error) 1096 return (error); 1097 buflen -= sizeof(struct file); 1098 where += sizeof(struct file); 1099 } 1100 *sizep = where - start; 1101 return (0); 1102 } 1103 1104 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1105 #define FILL_PERM(src, dst) do { \ 1106 (dst)._key = (src)._key; \ 1107 (dst).uid = (src).uid; \ 1108 (dst).gid = (src).gid; \ 1109 (dst).cuid = (src).cuid; \ 1110 (dst).cgid = (src).cgid; \ 1111 (dst).mode = (src).mode; \ 1112 (dst)._seq = (src)._seq; \ 1113 } while (0); 1114 #define FILL_MSG(src, dst) do { \ 1115 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1116 (dst).msg_qnum = (src).msg_qnum; \ 1117 (dst).msg_qbytes = (src).msg_qbytes; \ 1118 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1119 (dst).msg_lspid = (src).msg_lspid; \ 1120 (dst).msg_lrpid = (src).msg_lrpid; \ 1121 (dst).msg_stime = (src).msg_stime; \ 1122 (dst).msg_rtime = (src).msg_rtime; \ 1123 (dst).msg_ctime = (src).msg_ctime; \ 1124 } while (0) 1125 #define FILL_SEM(src, dst) do { \ 1126 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1127 (dst).sem_nsems = (src).sem_nsems; \ 1128 (dst).sem_otime = (src).sem_otime; \ 1129 (dst).sem_ctime = (src).sem_ctime; \ 1130 } while (0) 1131 #define FILL_SHM(src, dst) do { \ 1132 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1133 (dst).shm_segsz = (src).shm_segsz; \ 1134 (dst).shm_lpid = (src).shm_lpid; \ 1135 (dst).shm_cpid = (src).shm_cpid; \ 1136 (dst).shm_atime = (src).shm_atime; \ 1137 (dst).shm_dtime = (src).shm_dtime; \ 1138 (dst).shm_ctime = (src).shm_ctime; \ 1139 (dst).shm_nattch = (src).shm_nattch; \ 1140 } while (0) 1141 1142 static int 1143 sysctl_sysvipc(name, namelen, where, sizep) 1144 int *name; 1145 u_int namelen; 1146 void *where; 1147 size_t *sizep; 1148 { 1149 #ifdef SYSVMSG 1150 struct msg_sysctl_info *msgsi; 1151 #endif 1152 #ifdef SYSVSEM 1153 struct sem_sysctl_info *semsi; 1154 #endif 1155 #ifdef SYSVSHM 1156 struct shm_sysctl_info *shmsi; 1157 #endif 1158 size_t infosize, dssize, tsize, buflen; 1159 void *buf = NULL, *buf2; 1160 char *start; 1161 int32_t nds; 1162 int i, error, ret; 1163 1164 if (namelen != 1) 1165 return (EINVAL); 1166 1167 start = where; 1168 buflen = *sizep; 1169 1170 switch (*name) { 1171 case KERN_SYSVIPC_MSG_INFO: 1172 #ifdef SYSVMSG 1173 infosize = sizeof(msgsi->msginfo); 1174 nds = msginfo.msgmni; 1175 dssize = sizeof(msgsi->msgids[0]); 1176 break; 1177 #else 1178 return (EINVAL); 1179 #endif 1180 case KERN_SYSVIPC_SEM_INFO: 1181 #ifdef SYSVSEM 1182 infosize = sizeof(semsi->seminfo); 1183 nds = seminfo.semmni; 1184 dssize = sizeof(semsi->semids[0]); 1185 break; 1186 #else 1187 return (EINVAL); 1188 #endif 1189 case KERN_SYSVIPC_SHM_INFO: 1190 #ifdef SYSVSHM 1191 infosize = sizeof(shmsi->shminfo); 1192 nds = shminfo.shmmni; 1193 dssize = sizeof(shmsi->shmids[0]); 1194 break; 1195 #else 1196 return (EINVAL); 1197 #endif 1198 default: 1199 return (EINVAL); 1200 } 1201 /* 1202 * Round infosize to 64 bit boundary if requesting more than just 1203 * the info structure or getting the total data size. 1204 */ 1205 if (where == NULL || *sizep > infosize) 1206 infosize = ((infosize + 7) / 8) * 8; 1207 tsize = infosize + nds * dssize; 1208 1209 /* Return just the total size required. */ 1210 if (where == NULL) { 1211 *sizep = tsize; 1212 return (0); 1213 } 1214 1215 /* Not enough room for even the info struct. */ 1216 if (buflen < infosize) { 1217 *sizep = 0; 1218 return (ENOMEM); 1219 } 1220 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1221 memset(buf, 0, min(tsize, buflen)); 1222 1223 switch (*name) { 1224 #ifdef SYSVMSG 1225 case KERN_SYSVIPC_MSG_INFO: 1226 msgsi = (struct msg_sysctl_info *)buf; 1227 buf2 = &msgsi->msgids[0]; 1228 msgsi->msginfo = msginfo; 1229 break; 1230 #endif 1231 #ifdef SYSVSEM 1232 case KERN_SYSVIPC_SEM_INFO: 1233 semsi = (struct sem_sysctl_info *)buf; 1234 buf2 = &semsi->semids[0]; 1235 semsi->seminfo = seminfo; 1236 break; 1237 #endif 1238 #ifdef SYSVSHM 1239 case KERN_SYSVIPC_SHM_INFO: 1240 shmsi = (struct shm_sysctl_info *)buf; 1241 buf2 = &shmsi->shmids[0]; 1242 shmsi->shminfo = shminfo; 1243 break; 1244 #endif 1245 } 1246 buflen -= infosize; 1247 1248 ret = 0; 1249 if (buflen > 0) { 1250 /* Fill in the IPC data structures. */ 1251 for (i = 0; i < nds; i++) { 1252 if (buflen < dssize) { 1253 ret = ENOMEM; 1254 break; 1255 } 1256 switch (*name) { 1257 #ifdef SYSVMSG 1258 case KERN_SYSVIPC_MSG_INFO: 1259 FILL_MSG(msqids[i], msgsi->msgids[i]); 1260 break; 1261 #endif 1262 #ifdef SYSVSEM 1263 case KERN_SYSVIPC_SEM_INFO: 1264 FILL_SEM(sema[i], semsi->semids[i]); 1265 break; 1266 #endif 1267 #ifdef SYSVSHM 1268 case KERN_SYSVIPC_SHM_INFO: 1269 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1270 break; 1271 #endif 1272 } 1273 buflen -= dssize; 1274 } 1275 } 1276 *sizep -= buflen; 1277 error = copyout(buf, start, *sizep); 1278 /* If copyout succeeded, use return code set earlier. */ 1279 if (error == 0) 1280 error = ret; 1281 if (buf) 1282 free(buf, M_TEMP); 1283 return (error); 1284 } 1285 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1286 1287 static int 1288 sysctl_msgbuf(vwhere, sizep) 1289 void *vwhere; 1290 size_t *sizep; 1291 { 1292 char *where = vwhere; 1293 size_t len, maxlen = *sizep; 1294 long beg, end; 1295 int error; 1296 1297 /* 1298 * deal with cases where the message buffer has 1299 * become corrupted. 1300 */ 1301 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1302 msgbufenabled = 0; 1303 return (ENXIO); 1304 } 1305 1306 if (where == NULL) { 1307 /* always return full buffer size */ 1308 *sizep = msgbufp->msg_bufs; 1309 return (0); 1310 } 1311 1312 error = 0; 1313 maxlen = min(msgbufp->msg_bufs, maxlen); 1314 1315 /* 1316 * First, copy from the write pointer to the end of 1317 * message buffer. 1318 */ 1319 beg = msgbufp->msg_bufx; 1320 end = msgbufp->msg_bufs; 1321 while (maxlen > 0) { 1322 len = min(end - beg, maxlen); 1323 if (len == 0) 1324 break; 1325 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1326 if (error) 1327 break; 1328 where += len; 1329 maxlen -= len; 1330 1331 /* 1332 * ... then, copy from the beginning of message buffer to 1333 * the write pointer. 1334 */ 1335 beg = 0; 1336 end = msgbufp->msg_bufx; 1337 } 1338 return (error); 1339 } 1340 1341 /* 1342 * try over estimating by 5 procs 1343 */ 1344 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1345 1346 static int 1347 sysctl_doeproc(name, namelen, vwhere, sizep) 1348 int *name; 1349 u_int namelen; 1350 void *vwhere; 1351 size_t *sizep; 1352 { 1353 struct eproc eproc; 1354 struct kinfo_proc2 kproc2; 1355 struct kinfo_proc *dp; 1356 struct proc *p; 1357 const struct proclist_desc *pd; 1358 char *where, *dp2; 1359 int type, op, arg, elem_size, elem_count; 1360 int buflen, needed, error; 1361 1362 dp = vwhere; 1363 dp2 = where = vwhere; 1364 buflen = where != NULL ? *sizep : 0; 1365 error = needed = 0; 1366 type = name[0]; 1367 1368 if (type == KERN_PROC) { 1369 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1370 return (EINVAL); 1371 op = name[1]; 1372 if (op != KERN_PROC_ALL) 1373 arg = name[2]; 1374 } else { 1375 if (namelen != 5) 1376 return (EINVAL); 1377 op = name[1]; 1378 arg = name[2]; 1379 elem_size = name[3]; 1380 elem_count = name[4]; 1381 } 1382 1383 proclist_lock_read(); 1384 1385 pd = proclists; 1386 again: 1387 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1388 /* 1389 * Skip embryonic processes. 1390 */ 1391 if (p->p_stat == SIDL) 1392 continue; 1393 /* 1394 * TODO - make more efficient (see notes below). 1395 * do by session. 1396 */ 1397 switch (op) { 1398 1399 case KERN_PROC_PID: 1400 /* could do this with just a lookup */ 1401 if (p->p_pid != (pid_t)arg) 1402 continue; 1403 break; 1404 1405 case KERN_PROC_PGRP: 1406 /* could do this by traversing pgrp */ 1407 if (p->p_pgrp->pg_id != (pid_t)arg) 1408 continue; 1409 break; 1410 1411 case KERN_PROC_SESSION: 1412 if (p->p_session->s_sid != (pid_t)arg) 1413 continue; 1414 break; 1415 1416 case KERN_PROC_TTY: 1417 if (arg == KERN_PROC_TTY_REVOKE) { 1418 if ((p->p_flag & P_CONTROLT) == 0 || 1419 p->p_session->s_ttyp == NULL || 1420 p->p_session->s_ttyvp != NULL) 1421 continue; 1422 } else if ((p->p_flag & P_CONTROLT) == 0 || 1423 p->p_session->s_ttyp == NULL) { 1424 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1425 continue; 1426 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1427 continue; 1428 break; 1429 1430 case KERN_PROC_UID: 1431 if (p->p_ucred->cr_uid != (uid_t)arg) 1432 continue; 1433 break; 1434 1435 case KERN_PROC_RUID: 1436 if (p->p_cred->p_ruid != (uid_t)arg) 1437 continue; 1438 break; 1439 1440 case KERN_PROC_GID: 1441 if (p->p_ucred->cr_gid != (uid_t)arg) 1442 continue; 1443 break; 1444 1445 case KERN_PROC_RGID: 1446 if (p->p_cred->p_rgid != (uid_t)arg) 1447 continue; 1448 break; 1449 1450 case KERN_PROC_ALL: 1451 /* allow everything */ 1452 break; 1453 1454 default: 1455 error = EINVAL; 1456 goto cleanup; 1457 } 1458 if (type == KERN_PROC) { 1459 if (buflen >= sizeof(struct kinfo_proc)) { 1460 fill_eproc(p, &eproc); 1461 error = copyout((caddr_t)p, &dp->kp_proc, 1462 sizeof(struct proc)); 1463 if (error) 1464 goto cleanup; 1465 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1466 sizeof(eproc)); 1467 if (error) 1468 goto cleanup; 1469 dp++; 1470 buflen -= sizeof(struct kinfo_proc); 1471 } 1472 needed += sizeof(struct kinfo_proc); 1473 } else { /* KERN_PROC2 */ 1474 if (buflen >= elem_size && elem_count > 0) { 1475 fill_kproc2(p, &kproc2); 1476 /* 1477 * Copy out elem_size, but not larger than 1478 * the size of a struct kinfo_proc2. 1479 */ 1480 error = copyout(&kproc2, dp2, 1481 min(sizeof(kproc2), elem_size)); 1482 if (error) 1483 goto cleanup; 1484 dp2 += elem_size; 1485 buflen -= elem_size; 1486 elem_count--; 1487 } 1488 needed += elem_size; 1489 } 1490 } 1491 pd++; 1492 if (pd->pd_list != NULL) 1493 goto again; 1494 proclist_unlock_read(); 1495 1496 if (where != NULL) { 1497 if (type == KERN_PROC) 1498 *sizep = (caddr_t)dp - where; 1499 else 1500 *sizep = dp2 - where; 1501 if (needed > *sizep) 1502 return (ENOMEM); 1503 } else { 1504 needed += KERN_PROCSLOP; 1505 *sizep = needed; 1506 } 1507 return (0); 1508 cleanup: 1509 proclist_unlock_read(); 1510 return (error); 1511 } 1512 1513 /* 1514 * Fill in an eproc structure for the specified process. 1515 */ 1516 void 1517 fill_eproc(p, ep) 1518 struct proc *p; 1519 struct eproc *ep; 1520 { 1521 struct tty *tp; 1522 1523 ep->e_paddr = p; 1524 ep->e_sess = p->p_session; 1525 ep->e_pcred = *p->p_cred; 1526 ep->e_ucred = *p->p_ucred; 1527 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1528 ep->e_vm.vm_rssize = 0; 1529 ep->e_vm.vm_tsize = 0; 1530 ep->e_vm.vm_dsize = 0; 1531 ep->e_vm.vm_ssize = 0; 1532 /* ep->e_vm.vm_pmap = XXX; */ 1533 } else { 1534 struct vmspace *vm = p->p_vmspace; 1535 1536 ep->e_vm.vm_rssize = vm_resident_count(vm); 1537 ep->e_vm.vm_tsize = vm->vm_tsize; 1538 ep->e_vm.vm_dsize = vm->vm_dsize; 1539 ep->e_vm.vm_ssize = vm->vm_ssize; 1540 } 1541 if (p->p_pptr) 1542 ep->e_ppid = p->p_pptr->p_pid; 1543 else 1544 ep->e_ppid = 0; 1545 ep->e_pgid = p->p_pgrp->pg_id; 1546 ep->e_sid = ep->e_sess->s_sid; 1547 ep->e_jobc = p->p_pgrp->pg_jobc; 1548 if ((p->p_flag & P_CONTROLT) && 1549 (tp = ep->e_sess->s_ttyp)) { 1550 ep->e_tdev = tp->t_dev; 1551 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1552 ep->e_tsess = tp->t_session; 1553 } else 1554 ep->e_tdev = NODEV; 1555 if (p->p_wmesg) 1556 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1557 ep->e_xsize = ep->e_xrssize = 0; 1558 ep->e_xccount = ep->e_xswrss = 0; 1559 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1560 if (SESS_LEADER(p)) 1561 ep->e_flag |= EPROC_SLEADER; 1562 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1563 } 1564 1565 /* 1566 * Fill in an eproc structure for the specified process. 1567 */ 1568 static void 1569 fill_kproc2(p, ki) 1570 struct proc *p; 1571 struct kinfo_proc2 *ki; 1572 { 1573 struct tty *tp; 1574 1575 memset(ki, 0, sizeof(*ki)); 1576 1577 ki->p_forw = PTRTOINT64(p->p_forw); 1578 ki->p_back = PTRTOINT64(p->p_back); 1579 ki->p_paddr = PTRTOINT64(p); 1580 1581 ki->p_addr = PTRTOINT64(p->p_addr); 1582 ki->p_fd = PTRTOINT64(p->p_fd); 1583 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1584 ki->p_stats = PTRTOINT64(p->p_stats); 1585 ki->p_limit = PTRTOINT64(p->p_limit); 1586 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1587 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1588 ki->p_sess = PTRTOINT64(p->p_session); 1589 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1590 ki->p_ru = PTRTOINT64(p->p_ru); 1591 1592 ki->p_eflag = 0; 1593 ki->p_exitsig = p->p_exitsig; 1594 ki->p_flag = p->p_flag; 1595 1596 ki->p_pid = p->p_pid; 1597 if (p->p_pptr) 1598 ki->p_ppid = p->p_pptr->p_pid; 1599 else 1600 ki->p_ppid = 0; 1601 ki->p_sid = p->p_session->s_sid; 1602 ki->p__pgid = p->p_pgrp->pg_id; 1603 1604 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1605 1606 ki->p_uid = p->p_ucred->cr_uid; 1607 ki->p_ruid = p->p_cred->p_ruid; 1608 ki->p_gid = p->p_ucred->cr_gid; 1609 ki->p_rgid = p->p_cred->p_rgid; 1610 1611 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1612 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1613 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1614 1615 ki->p_jobc = p->p_pgrp->pg_jobc; 1616 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1617 ki->p_tdev = tp->t_dev; 1618 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1619 ki->p_tsess = PTRTOINT64(tp->t_session); 1620 } else { 1621 ki->p_tdev = NODEV; 1622 } 1623 1624 ki->p_estcpu = p->p_estcpu; 1625 ki->p_rtime_sec = p->p_rtime.tv_sec; 1626 ki->p_rtime_usec = p->p_rtime.tv_usec; 1627 ki->p_cpticks = p->p_cpticks; 1628 ki->p_pctcpu = p->p_pctcpu; 1629 ki->p_swtime = p->p_swtime; 1630 ki->p_slptime = p->p_slptime; 1631 if (p->p_stat == SONPROC) { 1632 KDASSERT(p->p_cpu != NULL); 1633 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1634 } else 1635 ki->p_schedflags = 0; 1636 1637 ki->p_uticks = p->p_uticks; 1638 ki->p_sticks = p->p_sticks; 1639 ki->p_iticks = p->p_iticks; 1640 1641 ki->p_tracep = PTRTOINT64(p->p_tracep); 1642 ki->p_traceflag = p->p_traceflag; 1643 1644 ki->p_holdcnt = p->p_holdcnt; 1645 1646 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1647 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1648 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1649 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1650 1651 ki->p_stat = p->p_stat; 1652 ki->p_priority = p->p_priority; 1653 ki->p_usrpri = p->p_usrpri; 1654 ki->p_nice = p->p_nice; 1655 1656 ki->p_xstat = p->p_xstat; 1657 ki->p_acflag = p->p_acflag; 1658 1659 strncpy(ki->p_comm, p->p_comm, 1660 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1661 1662 if (p->p_wmesg) 1663 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1664 ki->p_wchan = PTRTOINT64(p->p_wchan); 1665 1666 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1667 1668 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1669 ki->p_vm_rssize = 0; 1670 ki->p_vm_tsize = 0; 1671 ki->p_vm_dsize = 0; 1672 ki->p_vm_ssize = 0; 1673 } else { 1674 struct vmspace *vm = p->p_vmspace; 1675 1676 ki->p_vm_rssize = vm_resident_count(vm); 1677 ki->p_vm_tsize = vm->vm_tsize; 1678 ki->p_vm_dsize = vm->vm_dsize; 1679 ki->p_vm_ssize = vm->vm_ssize; 1680 } 1681 1682 if (p->p_session->s_ttyvp) 1683 ki->p_eflag |= EPROC_CTTY; 1684 if (SESS_LEADER(p)) 1685 ki->p_eflag |= EPROC_SLEADER; 1686 1687 /* XXX Is this double check necessary? */ 1688 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1689 ki->p_uvalid = 0; 1690 } else { 1691 ki->p_uvalid = 1; 1692 1693 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1694 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1695 1696 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1697 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1698 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1699 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1700 1701 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1702 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1703 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1704 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1705 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1706 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1707 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1708 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1709 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1710 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1711 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1712 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1713 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1714 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1715 1716 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1717 p->p_stats->p_cru.ru_stime.tv_sec; 1718 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1719 p->p_stats->p_cru.ru_stime.tv_usec; 1720 } 1721 #ifdef MULTIPROCESSOR 1722 if (p->p_cpu != NULL) 1723 ki->p_cpuid = p->p_cpu->ci_cpuid; 1724 else 1725 #endif 1726 ki->p_cpuid = KI_NOCPU; 1727 } 1728 1729 int 1730 sysctl_procargs(name, namelen, where, sizep, up) 1731 int *name; 1732 u_int namelen; 1733 void *where; 1734 size_t *sizep; 1735 struct proc *up; 1736 { 1737 struct ps_strings pss; 1738 struct proc *p; 1739 size_t len, upper_bound, xlen; 1740 struct uio auio; 1741 struct iovec aiov; 1742 vaddr_t argv; 1743 pid_t pid; 1744 int nargv, type, error, i; 1745 char *arg; 1746 char *tmp; 1747 1748 if (namelen != 2) 1749 return (EINVAL); 1750 pid = name[0]; 1751 type = name[1]; 1752 1753 switch (type) { 1754 case KERN_PROC_ARGV: 1755 case KERN_PROC_NARGV: 1756 case KERN_PROC_ENV: 1757 case KERN_PROC_NENV: 1758 /* ok */ 1759 break; 1760 default: 1761 return (EINVAL); 1762 } 1763 1764 /* check pid */ 1765 if ((p = pfind(pid)) == NULL) 1766 return (EINVAL); 1767 1768 /* only root or same user change look at the environment */ 1769 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1770 if (up->p_ucred->cr_uid != 0) { 1771 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1772 up->p_cred->p_ruid != p->p_cred->p_svuid) 1773 return (EPERM); 1774 } 1775 } 1776 1777 if (sizep != NULL && where == NULL) { 1778 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1779 *sizep = sizeof (int); 1780 else 1781 *sizep = ARG_MAX; /* XXX XXX XXX */ 1782 return (0); 1783 } 1784 if (where == NULL || sizep == NULL) 1785 return (EINVAL); 1786 1787 /* 1788 * Zombies don't have a stack, so we can't read their psstrings. 1789 * System processes also don't have a user stack. 1790 */ 1791 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1792 return (EINVAL); 1793 1794 /* 1795 * Lock the process down in memory. 1796 */ 1797 /* XXXCDC: how should locking work here? */ 1798 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1799 return (EFAULT); 1800 p->p_vmspace->vm_refcnt++; /* XXX */ 1801 1802 /* 1803 * Allocate a temporary buffer to hold the arguments. 1804 */ 1805 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1806 1807 /* 1808 * Read in the ps_strings structure. 1809 */ 1810 aiov.iov_base = &pss; 1811 aiov.iov_len = sizeof(pss); 1812 auio.uio_iov = &aiov; 1813 auio.uio_iovcnt = 1; 1814 auio.uio_offset = (vaddr_t)p->p_psstr; 1815 auio.uio_resid = sizeof(pss); 1816 auio.uio_segflg = UIO_SYSSPACE; 1817 auio.uio_rw = UIO_READ; 1818 auio.uio_procp = NULL; 1819 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1820 if (error) 1821 goto done; 1822 1823 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1824 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1825 else 1826 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1827 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1828 error = copyout(&nargv, where, sizeof(nargv)); 1829 *sizep = sizeof(nargv); 1830 goto done; 1831 } 1832 /* 1833 * Now read the address of the argument vector. 1834 */ 1835 switch (type) { 1836 case KERN_PROC_ARGV: 1837 /* XXX compat32 stuff here */ 1838 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1839 break; 1840 case KERN_PROC_ENV: 1841 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1842 break; 1843 default: 1844 return (EINVAL); 1845 } 1846 auio.uio_offset = (off_t)(long)tmp; 1847 aiov.iov_base = &argv; 1848 aiov.iov_len = sizeof(argv); 1849 auio.uio_iov = &aiov; 1850 auio.uio_iovcnt = 1; 1851 auio.uio_resid = sizeof(argv); 1852 auio.uio_segflg = UIO_SYSSPACE; 1853 auio.uio_rw = UIO_READ; 1854 auio.uio_procp = NULL; 1855 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1856 if (error) 1857 goto done; 1858 1859 /* 1860 * Now copy in the actual argument vector, one page at a time, 1861 * since we don't know how long the vector is (though, we do 1862 * know how many NUL-terminated strings are in the vector). 1863 */ 1864 len = 0; 1865 upper_bound = *sizep; 1866 for (; nargv != 0 && len < upper_bound; len += xlen) { 1867 aiov.iov_base = arg; 1868 aiov.iov_len = PAGE_SIZE; 1869 auio.uio_iov = &aiov; 1870 auio.uio_iovcnt = 1; 1871 auio.uio_offset = argv + len; 1872 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1873 auio.uio_resid = xlen; 1874 auio.uio_segflg = UIO_SYSSPACE; 1875 auio.uio_rw = UIO_READ; 1876 auio.uio_procp = NULL; 1877 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1878 if (error) 1879 goto done; 1880 1881 for (i = 0; i < xlen && nargv != 0; i++) { 1882 if (arg[i] == '\0') 1883 nargv--; /* one full string */ 1884 } 1885 1886 /* make sure we don't copyout past the end of the user's buffer */ 1887 if (len + i > upper_bound) 1888 i = upper_bound - len; 1889 1890 error = copyout(arg, (char *)where + len, i); 1891 if (error) 1892 break; 1893 1894 if (nargv == 0) { 1895 len += i; 1896 break; 1897 } 1898 } 1899 *sizep = len; 1900 1901 done: 1902 uvmspace_free(p->p_vmspace); 1903 1904 free(arg, M_TEMP); 1905 return (error); 1906 } 1907 1908 #if NPTY > 0 1909 int pty_maxptys __P((int, int)); /* defined in kern/tty_pty.c */ 1910 1911 /* 1912 * Validate parameters and get old / set new parameters 1913 * for pty sysctl function. 1914 */ 1915 static int 1916 sysctl_pty(oldp, oldlenp, newp, newlen) 1917 void *oldp; 1918 size_t *oldlenp; 1919 void *newp; 1920 size_t newlen; 1921 { 1922 int error = 0; 1923 int oldmax = 0, newmax = 0; 1924 1925 /* get current value of maxptys */ 1926 oldmax = pty_maxptys(0, 0); 1927 1928 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1929 1930 if (!error && newp) { 1931 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1932 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1933 1934 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1935 return (EINVAL); 1936 1937 } 1938 1939 return (error); 1940 } 1941 #endif /* NPTY > 0 */ 1942
Indexes created Tue Sep 23 07:09:52 GMT 2025