kern_sysctl.c revision 1.103.4.1
1 /* $NetBSD: kern_sysctl.c,v 1.103.4.1 2002/03/11 18:28:53 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95 39 */ 40 41 /* 42 * sysctl system call. 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: kern_sysctl.c,v 1.103.4.1 2002/03/11 18:28:53 thorpej Exp $"); 47 48 #include "opt_ddb.h" 49 #include "opt_insecure.h" 50 #include "opt_defcorename.h" 51 #include "opt_pipe.h" 52 #include "opt_sysv.h" 53 #include "pty.h" 54 55 #include <sys/param.h> 56 #include <sys/systm.h> 57 #include <sys/kernel.h> 58 #include <sys/buf.h> 59 #include <sys/device.h> 60 #include <sys/disklabel.h> 61 #include <sys/dkstat.h> 62 #include <sys/exec.h> 63 #include <sys/file.h> 64 #include <sys/ioctl.h> 65 #include <sys/malloc.h> 66 #include <sys/mount.h> 67 #include <sys/msgbuf.h> 68 #include <sys/pool.h> 69 #include <sys/proc.h> 70 #include <sys/mutex.h> 71 #include <sys/resource.h> 72 #include <sys/resourcevar.h> 73 #include <sys/syscallargs.h> 74 #include <sys/tty.h> 75 #include <sys/unistd.h> 76 #include <sys/vnode.h> 77 #include <sys/socketvar.h> 78 #define __SYSCTL_PRIVATE 79 #include <sys/sysctl.h> 80 #include <sys/lock.h> 81 #include <sys/namei.h> 82 83 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 84 #include <sys/ipc.h> 85 #endif 86 #ifdef SYSVMSG 87 #include <sys/msg.h> 88 #endif 89 #ifdef SYSVSEM 90 #include <sys/sem.h> 91 #endif 92 #ifdef SYSVSHM 93 #include <sys/shm.h> 94 #endif 95 96 #include <dev/cons.h> 97 98 #if defined(DDB) 99 #include <ddb/ddbvar.h> 100 #endif 101 102 #ifndef PIPE_SOCKETPAIR 103 #include <sys/pipe.h> 104 #endif 105 106 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 107 108 static int sysctl_file(void *, size_t *); 109 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 110 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 111 #endif 112 static int sysctl_msgbuf(void *, size_t *); 113 static int sysctl_doeproc(int *, u_int, void *, size_t *); 114 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 115 #ifdef MULTIPROCESSOR 116 static int sysctl_docptime(void *, size_t *, void *); 117 static int sysctl_ncpus(void); 118 #endif 119 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 120 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 121 #if NPTY > 0 122 static int sysctl_pty(void *, size_t *, void *, size_t); 123 #endif 124 125 /* 126 * The `sysctl_memlock' is intended to keep too many processes from 127 * locking down memory by doing sysctls at once. Whether or not this 128 * is really a good idea to worry about it probably a subject of some 129 * debate. 130 */ 131 kmutex_t sysctl_memlock; 132 133 void 134 sysctl_init(void) 135 { 136 137 mutex_init(&sysctl_memlock, MUTEX_DEFAULT, 0); 138 } 139 140 int 141 sys___sysctl(struct proc *p, void *v, register_t *retval) 142 { 143 struct sys___sysctl_args /* { 144 syscallarg(int *) name; 145 syscallarg(u_int) namelen; 146 syscallarg(void *) old; 147 syscallarg(size_t *) oldlenp; 148 syscallarg(void *) new; 149 syscallarg(size_t) newlen; 150 } */ *uap = v; 151 int error; 152 size_t savelen = 0, oldlen = 0; 153 sysctlfn *fn; 154 int name[CTL_MAXNAME]; 155 size_t *oldlenp; 156 157 /* 158 * all top-level sysctl names are non-terminal 159 */ 160 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 161 return (EINVAL); 162 error = copyin(SCARG(uap, name), &name, 163 SCARG(uap, namelen) * sizeof(int)); 164 if (error) 165 return (error); 166 167 /* 168 * For all but CTL_PROC, must be root to change a value. 169 * For CTL_PROC, must be root, or owner of the proc (and not suid), 170 * this is checked in proc_sysctl() (once we know the targer proc). 171 */ 172 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 173 (error = suser(p->p_ucred, &p->p_acflag))) 174 return error; 175 176 switch (name[0]) { 177 case CTL_KERN: 178 fn = kern_sysctl; 179 break; 180 case CTL_HW: 181 fn = hw_sysctl; 182 break; 183 case CTL_VM: 184 fn = uvm_sysctl; 185 break; 186 case CTL_NET: 187 fn = net_sysctl; 188 break; 189 case CTL_VFS: 190 fn = vfs_sysctl; 191 break; 192 case CTL_MACHDEP: 193 fn = cpu_sysctl; 194 break; 195 #ifdef DEBUG 196 case CTL_DEBUG: 197 fn = debug_sysctl; 198 break; 199 #endif 200 #ifdef DDB 201 case CTL_DDB: 202 fn = ddb_sysctl; 203 break; 204 #endif 205 case CTL_PROC: 206 fn = proc_sysctl; 207 break; 208 default: 209 return (EOPNOTSUPP); 210 } 211 212 /* 213 * XXX Hey, we wire `old', but what about `new'? 214 */ 215 216 oldlenp = SCARG(uap, oldlenp); 217 if (oldlenp) { 218 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 219 return (error); 220 oldlenp = &oldlen; 221 } 222 if (SCARG(uap, old) != NULL) { 223 mutex_enter(&sysctl_memlock); 224 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 225 if (error) { 226 mutex_exit(&sysctl_memlock); 227 return error; 228 } 229 savelen = oldlen; 230 } 231 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 232 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 233 if (SCARG(uap, old) != NULL) { 234 uvm_vsunlock(p, SCARG(uap, old), savelen); 235 mutex_exit(&sysctl_memlock); 236 } 237 if (error) 238 return (error); 239 if (SCARG(uap, oldlenp)) 240 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 241 return (error); 242 } 243 244 /* 245 * Attributes stored in the kernel. 246 */ 247 char hostname[MAXHOSTNAMELEN]; 248 int hostnamelen; 249 250 char domainname[MAXHOSTNAMELEN]; 251 int domainnamelen; 252 253 long hostid; 254 255 #ifdef INSECURE 256 int securelevel = -1; 257 #else 258 int securelevel = 0; 259 #endif 260 261 #ifndef DEFCORENAME 262 #define DEFCORENAME "%n.core" 263 #endif 264 char defcorename[MAXPATHLEN] = DEFCORENAME; 265 int defcorenamelen = sizeof(DEFCORENAME); 266 267 extern int kern_logsigexit; 268 extern fixpt_t ccpu; 269 270 #ifndef MULTIPROCESSOR 271 #define sysctl_ncpus() 1 272 #endif 273 274 #ifdef MULTIPROCESSOR 275 276 #ifndef CPU_INFO_FOREACH 277 #define CPU_INFO_ITERATOR int 278 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 279 #endif 280 281 static int 282 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 283 { 284 u_int64_t cp_time[CPUSTATES]; 285 int i; 286 struct cpu_info *ci; 287 CPU_INFO_ITERATOR cii; 288 289 for (i=0; i<CPUSTATES; i++) 290 cp_time[i] = 0; 291 292 for (CPU_INFO_FOREACH(cii, ci)) { 293 for (i=0; i<CPUSTATES; i++) 294 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 295 } 296 return (sysctl_rdstruct(oldp, oldlenp, newp, 297 cp_time, sizeof(cp_time))); 298 } 299 300 static int 301 sysctl_ncpus(void) 302 { 303 struct cpu_info *ci; 304 CPU_INFO_ITERATOR cii; 305 306 int ncpus = 0; 307 for (CPU_INFO_FOREACH(cii, ci)) 308 ncpus++; 309 return ncpus; 310 } 311 312 #endif 313 314 /* 315 * kernel related system variables. 316 */ 317 int 318 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 319 void *newp, size_t newlen, struct proc *p) 320 { 321 int error, level, inthostid; 322 int old_autonicetime; 323 int old_vnodes; 324 dev_t consdev; 325 326 /* All sysctl names at this level, except for a few, are terminal. */ 327 switch (name[0]) { 328 case KERN_PROC: 329 case KERN_PROC2: 330 case KERN_PROF: 331 case KERN_MBUF: 332 case KERN_PROC_ARGS: 333 case KERN_SYSVIPC_INFO: 334 case KERN_PIPE: 335 case KERN_TKSTAT: 336 /* Not terminal. */ 337 break; 338 default: 339 if (namelen != 1) 340 return (ENOTDIR); /* overloaded */ 341 } 342 343 switch (name[0]) { 344 case KERN_OSTYPE: 345 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 346 case KERN_OSRELEASE: 347 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 348 case KERN_OSREV: 349 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 350 case KERN_VERSION: 351 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 352 case KERN_MAXVNODES: 353 old_vnodes = desiredvnodes; 354 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 355 if (newp && !error) { 356 if (old_vnodes > desiredvnodes) { 357 desiredvnodes = old_vnodes; 358 return (EINVAL); 359 } 360 vfs_reinit(); 361 nchreinit(); 362 } 363 return (error); 364 case KERN_MAXPROC: 365 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 366 case KERN_MAXFILES: 367 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 368 case KERN_ARGMAX: 369 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 370 case KERN_SECURELVL: 371 level = securelevel; 372 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 373 newp == NULL) 374 return (error); 375 if (level < securelevel && p->p_pid != 1) 376 return (EPERM); 377 securelevel = level; 378 return (0); 379 case KERN_HOSTNAME: 380 error = sysctl_string(oldp, oldlenp, newp, newlen, 381 hostname, sizeof(hostname)); 382 if (newp && !error) 383 hostnamelen = newlen; 384 return (error); 385 case KERN_DOMAINNAME: 386 error = sysctl_string(oldp, oldlenp, newp, newlen, 387 domainname, sizeof(domainname)); 388 if (newp && !error) 389 domainnamelen = newlen; 390 return (error); 391 case KERN_HOSTID: 392 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 393 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 394 if (newp && !error) 395 hostid = inthostid; 396 return (error); 397 case KERN_CLOCKRATE: 398 return (sysctl_clockrate(oldp, oldlenp)); 399 case KERN_BOOTTIME: 400 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 401 sizeof(struct timeval))); 402 case KERN_VNODE: 403 return (sysctl_vnode(oldp, oldlenp, p)); 404 case KERN_PROC: 405 case KERN_PROC2: 406 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 407 case KERN_PROC_ARGS: 408 return (sysctl_procargs(name + 1, namelen - 1, 409 oldp, oldlenp, p)); 410 case KERN_FILE: 411 return (sysctl_file(oldp, oldlenp)); 412 #ifdef GPROF 413 case KERN_PROF: 414 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 415 newp, newlen)); 416 #endif 417 case KERN_POSIX1: 418 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 419 case KERN_NGROUPS: 420 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 421 case KERN_JOB_CONTROL: 422 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 423 case KERN_SAVED_IDS: 424 #ifdef _POSIX_SAVED_IDS 425 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 426 #else 427 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 428 #endif 429 case KERN_MAXPARTITIONS: 430 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 431 case KERN_RAWPARTITION: 432 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 433 #ifdef NTP 434 case KERN_NTPTIME: 435 return (sysctl_ntptime(oldp, oldlenp)); 436 #endif 437 case KERN_AUTONICETIME: 438 old_autonicetime = autonicetime; 439 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 440 if (autonicetime < 0) 441 autonicetime = old_autonicetime; 442 return (error); 443 case KERN_AUTONICEVAL: 444 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 445 if (autoniceval < PRIO_MIN) 446 autoniceval = PRIO_MIN; 447 if (autoniceval > PRIO_MAX) 448 autoniceval = PRIO_MAX; 449 return (error); 450 case KERN_RTC_OFFSET: 451 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 452 case KERN_ROOT_DEVICE: 453 return (sysctl_rdstring(oldp, oldlenp, newp, 454 root_device->dv_xname)); 455 case KERN_MSGBUFSIZE: 456 /* 457 * deal with cases where the message buffer has 458 * become corrupted. 459 */ 460 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 461 msgbufenabled = 0; 462 return (ENXIO); 463 } 464 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 465 case KERN_FSYNC: 466 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 467 case KERN_SYSVMSG: 468 #ifdef SYSVMSG 469 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 470 #else 471 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 472 #endif 473 case KERN_SYSVSEM: 474 #ifdef SYSVSEM 475 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 476 #else 477 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 478 #endif 479 case KERN_SYSVSHM: 480 #ifdef SYSVSHM 481 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 482 #else 483 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 484 #endif 485 case KERN_DEFCORENAME: 486 if (newp && newlen < 1) 487 return (EINVAL); 488 error = sysctl_string(oldp, oldlenp, newp, newlen, 489 defcorename, sizeof(defcorename)); 490 if (newp && !error) 491 defcorenamelen = newlen; 492 return (error); 493 case KERN_SYNCHRONIZED_IO: 494 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 495 case KERN_IOV_MAX: 496 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 497 case KERN_MBUF: 498 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 499 newp, newlen)); 500 case KERN_MAPPED_FILES: 501 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 502 case KERN_MEMLOCK: 503 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 504 case KERN_MEMLOCK_RANGE: 505 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 506 case KERN_MEMORY_PROTECTION: 507 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 508 case KERN_LOGIN_NAME_MAX: 509 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 510 case KERN_LOGSIGEXIT: 511 return (sysctl_int(oldp, oldlenp, newp, newlen, 512 &kern_logsigexit)); 513 case KERN_FSCALE: 514 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 515 case KERN_CCPU: 516 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 517 case KERN_CP_TIME: 518 #ifndef MULTIPROCESSOR 519 return (sysctl_rdstruct(oldp, oldlenp, newp, 520 curcpu()->ci_schedstate.spc_cp_time, 521 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 522 #else 523 return (sysctl_docptime(oldp, oldlenp, newp)); 524 #endif 525 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 526 case KERN_SYSVIPC_INFO: 527 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 528 #endif 529 case KERN_MSGBUF: 530 return (sysctl_msgbuf(oldp, oldlenp)); 531 case KERN_CONSDEV: 532 if (cn_tab != NULL) 533 consdev = cn_tab->cn_dev; 534 else 535 consdev = NODEV; 536 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 537 sizeof consdev)); 538 #if NPTY > 0 539 case KERN_MAXPTYS: 540 return sysctl_pty(oldp, oldlenp, newp, newlen); 541 #endif 542 #ifndef PIPE_SOCKETPAIR 543 case KERN_PIPE: 544 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 545 newp, newlen)); 546 #endif 547 case KERN_MAXPHYS: 548 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 549 case KERN_SBMAX: 550 { 551 int new_sbmax = sb_max; 552 553 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 554 if (newp && !error) { 555 if (new_sbmax < (16 * 1024)) /* sanity */ 556 return (EINVAL); 557 sb_max = new_sbmax; 558 } 559 return (error); 560 } 561 case KERN_TKSTAT: 562 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 563 newp)); 564 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 565 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 566 default: 567 return (EOPNOTSUPP); 568 } 569 /* NOTREACHED */ 570 } 571 572 /* 573 * hardware related system variables. 574 */ 575 int 576 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 577 void *newp, size_t newlen, struct proc *p) 578 { 579 580 /* All sysctl names at this level, except for a few, are terminal. */ 581 switch (name[0]) { 582 case HW_DISKSTATS: 583 /* Not terminal. */ 584 break; 585 default: 586 if (namelen != 1) 587 return (ENOTDIR); /* overloaded */ 588 } 589 590 switch (name[0]) { 591 case HW_MACHINE: 592 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 593 case HW_MACHINE_ARCH: 594 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 595 case HW_MODEL: 596 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 597 case HW_NCPU: 598 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 599 case HW_BYTEORDER: 600 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 601 case HW_PHYSMEM: 602 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 603 case HW_USERMEM: 604 return (sysctl_rdint(oldp, oldlenp, newp, 605 ctob(physmem - uvmexp.wired))); 606 case HW_PAGESIZE: 607 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 608 case HW_ALIGNBYTES: 609 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 610 case HW_DISKNAMES: 611 return (sysctl_disknames(oldp, oldlenp)); 612 case HW_DISKSTATS: 613 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 614 case HW_CNMAGIC: { 615 char magic[CNS_LEN]; 616 int error; 617 618 if (oldp) 619 cn_get_magic(magic, CNS_LEN); 620 error = sysctl_string(oldp, oldlenp, newp, newlen, 621 magic, sizeof(magic)); 622 if (newp && !error) { 623 error = cn_set_magic(magic); 624 } 625 return (error); 626 } 627 default: 628 return (EOPNOTSUPP); 629 } 630 /* NOTREACHED */ 631 } 632 633 #ifdef DEBUG 634 /* 635 * Debugging related system variables. 636 */ 637 struct ctldebug debug0, debug1, debug2, debug3, debug4; 638 struct ctldebug debug5, debug6, debug7, debug8, debug9; 639 struct ctldebug debug10, debug11, debug12, debug13, debug14; 640 struct ctldebug debug15, debug16, debug17, debug18, debug19; 641 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 642 &debug0, &debug1, &debug2, &debug3, &debug4, 643 &debug5, &debug6, &debug7, &debug8, &debug9, 644 &debug10, &debug11, &debug12, &debug13, &debug14, 645 &debug15, &debug16, &debug17, &debug18, &debug19, 646 }; 647 648 int 649 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 650 void *newp, size_t newlen, struct proc *p) 651 { 652 struct ctldebug *cdp; 653 654 /* all sysctl names at this level are name and field */ 655 if (namelen != 2) 656 return (ENOTDIR); /* overloaded */ 657 cdp = debugvars[name[0]]; 658 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 659 return (EOPNOTSUPP); 660 switch (name[1]) { 661 case CTL_DEBUG_NAME: 662 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 663 case CTL_DEBUG_VALUE: 664 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 665 default: 666 return (EOPNOTSUPP); 667 } 668 /* NOTREACHED */ 669 } 670 #endif /* DEBUG */ 671 672 int 673 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 674 void *newp, size_t newlen, struct proc *p) 675 { 676 struct proc *ptmp = NULL; 677 const struct proclist_desc *pd; 678 int error = 0; 679 struct rlimit alim; 680 struct plimit *newplim; 681 char *tmps = NULL; 682 int i, curlen, len; 683 684 if (namelen < 2) 685 return EINVAL; 686 687 if (name[0] == PROC_CURPROC) { 688 ptmp = p; 689 } else { 690 proclist_lock_read(); 691 for (pd = proclists; pd->pd_list != NULL; pd++) { 692 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 693 ptmp = LIST_NEXT(ptmp, p_list)) { 694 /* Skip embryonic processes. */ 695 if (ptmp->p_stat == SIDL) 696 continue; 697 if (ptmp->p_pid == (pid_t)name[0]) 698 break; 699 } 700 if (ptmp != NULL) 701 break; 702 } 703 proclist_unlock_read(); 704 if (ptmp == NULL) 705 return(ESRCH); 706 if (p->p_ucred->cr_uid != 0) { 707 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 708 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 709 return EPERM; 710 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 711 return EPERM; /* sgid proc */ 712 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 713 if (p->p_ucred->cr_groups[i] == 714 ptmp->p_cred->p_rgid) 715 break; 716 } 717 if (i == p->p_ucred->cr_ngroups) 718 return EPERM; 719 } 720 } 721 if (name[1] == PROC_PID_CORENAME) { 722 if (namelen != 2) 723 return EINVAL; 724 /* 725 * Can't use sysctl_string() here because we may malloc a new 726 * area during the process, so we have to do it by hand. 727 */ 728 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 729 if (oldlenp && *oldlenp < curlen) { 730 if (!oldp) 731 *oldlenp = curlen; 732 return (ENOMEM); 733 } 734 if (newp) { 735 if (securelevel > 2) 736 return EPERM; 737 if (newlen > MAXPATHLEN) 738 return ENAMETOOLONG; 739 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 740 if (tmps == NULL) 741 return ENOMEM; 742 error = copyin(newp, tmps, newlen + 1); 743 tmps[newlen] = '\0'; 744 if (error) 745 goto cleanup; 746 /* Enforce to be either 'core' for end with '.core' */ 747 if (newlen < 4) { /* c.o.r.e */ 748 error = EINVAL; 749 goto cleanup; 750 } 751 len = newlen - 4; 752 if (len > 0) { 753 if (tmps[len - 1] != '.' && 754 tmps[len - 1] != '/') { 755 error = EINVAL; 756 goto cleanup; 757 } 758 } 759 if (strcmp(&tmps[len], "core") != 0) { 760 error = EINVAL; 761 goto cleanup; 762 } 763 } 764 if (oldp && oldlenp) { 765 *oldlenp = curlen; 766 error = copyout(ptmp->p_limit->pl_corename, oldp, 767 curlen); 768 } 769 if (newp && error == 0) { 770 /* if the 2 strings are identical, don't limcopy() */ 771 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 772 error = 0; 773 goto cleanup; 774 } 775 if (ptmp->p_limit->p_refcnt > 1 && 776 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 777 newplim = limcopy(ptmp->p_limit); 778 limfree(ptmp->p_limit); 779 ptmp->p_limit = newplim; 780 } 781 if (ptmp->p_limit->pl_corename != defcorename) { 782 free(ptmp->p_limit->pl_corename, M_TEMP); 783 } 784 ptmp->p_limit->pl_corename = tmps; 785 return (0); 786 } 787 cleanup: 788 if (tmps) 789 free(tmps, M_TEMP); 790 return (error); 791 } 792 if (name[1] == PROC_PID_LIMIT) { 793 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 794 return EINVAL; 795 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 796 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 797 error = sysctl_quad(oldp, oldlenp, newp, newlen, 798 &alim.rlim_max); 799 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 800 error = sysctl_quad(oldp, oldlenp, newp, newlen, 801 &alim.rlim_cur); 802 else 803 error = EINVAL; 804 805 if (error) 806 return error; 807 808 if (newp) 809 error = dosetrlimit(ptmp, p->p_cred, 810 name[2] - 1, &alim); 811 return error; 812 } 813 return (EINVAL); 814 } 815 816 /* 817 * Convenience macros. 818 */ 819 820 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 821 if (oldlenp) { \ 822 if (!oldp) \ 823 *oldlenp = len; \ 824 else { \ 825 if (*oldlenp < len) \ 826 return(ENOMEM); \ 827 *oldlenp = len; \ 828 error = copyout((caddr_t)valp, oldp, len); \ 829 } \ 830 } 831 832 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 833 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 834 835 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 836 if (newp && newlen != len) \ 837 return (EINVAL); 838 839 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 840 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 841 842 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 843 if (error == 0 && newp) \ 844 error = copyin(newp, valp, len); 845 846 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 847 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 848 849 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 850 if (oldlenp) { \ 851 len = strlen(str) + 1; \ 852 if (!oldp) \ 853 *oldlenp = len; \ 854 else { \ 855 if (*oldlenp < len) { \ 856 err2 = ENOMEM; \ 857 len = *oldlenp; \ 858 } else \ 859 *oldlenp = len; \ 860 error = copyout(str, oldp, len);\ 861 if (error == 0) \ 862 error = err2; \ 863 } \ 864 } 865 866 /* 867 * Validate parameters and get old / set new parameters 868 * for an integer-valued sysctl function. 869 */ 870 int 871 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 872 { 873 int error = 0; 874 875 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 876 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 877 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 878 879 return (error); 880 } 881 882 883 /* 884 * As above, but read-only. 885 */ 886 int 887 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 888 { 889 int error = 0; 890 891 if (newp) 892 return (EPERM); 893 894 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 895 896 return (error); 897 } 898 899 /* 900 * Validate parameters and get old / set new parameters 901 * for an quad-valued sysctl function. 902 */ 903 int 904 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 905 quad_t *valp) 906 { 907 int error = 0; 908 909 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 910 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 911 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 912 913 return (error); 914 } 915 916 /* 917 * As above, but read-only. 918 */ 919 int 920 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 921 { 922 int error = 0; 923 924 if (newp) 925 return (EPERM); 926 927 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 928 929 return (error); 930 } 931 932 /* 933 * Validate parameters and get old / set new parameters 934 * for a string-valued sysctl function. 935 */ 936 int 937 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 938 int maxlen) 939 { 940 int len, error = 0, err2 = 0; 941 942 if (newp && newlen >= maxlen) 943 return (EINVAL); 944 945 SYSCTL_STRING_CORE(oldp, oldlenp, str); 946 947 if (error == 0 && newp) { 948 error = copyin(newp, str, newlen); 949 str[newlen] = 0; 950 } 951 return (error); 952 } 953 954 /* 955 * As above, but read-only. 956 */ 957 int 958 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 959 { 960 int len, error = 0, err2 = 0; 961 962 if (newp) 963 return (EPERM); 964 965 SYSCTL_STRING_CORE(oldp, oldlenp, str); 966 967 return (error); 968 } 969 970 /* 971 * Validate parameters and get old / set new parameters 972 * for a structure oriented sysctl function. 973 */ 974 int 975 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 976 int len) 977 { 978 int error = 0; 979 980 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 981 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 982 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 983 984 return (error); 985 } 986 987 /* 988 * Validate parameters and get old parameters 989 * for a structure oriented sysctl function. 990 */ 991 int 992 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 993 int len) 994 { 995 int error = 0; 996 997 if (newp) 998 return (EPERM); 999 1000 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1001 1002 return (error); 1003 } 1004 1005 /* 1006 * As above, but can return a truncated result. 1007 */ 1008 int 1009 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1010 int len) 1011 { 1012 int error = 0; 1013 1014 if (newp) 1015 return (EPERM); 1016 1017 len = min(*oldlenp, len); 1018 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1019 1020 return (error); 1021 } 1022 1023 /* 1024 * Get file structures. 1025 */ 1026 static int 1027 sysctl_file(void *vwhere, size_t *sizep) 1028 { 1029 int buflen, error; 1030 struct file *fp; 1031 char *start, *where; 1032 1033 start = where = vwhere; 1034 buflen = *sizep; 1035 if (where == NULL) { 1036 /* 1037 * overestimate by 10 files 1038 */ 1039 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1040 return (0); 1041 } 1042 1043 /* 1044 * first copyout filehead 1045 */ 1046 if (buflen < sizeof(filehead)) { 1047 *sizep = 0; 1048 return (0); 1049 } 1050 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1051 if (error) 1052 return (error); 1053 buflen -= sizeof(filehead); 1054 where += sizeof(filehead); 1055 1056 /* 1057 * followed by an array of file structures 1058 */ 1059 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1060 if (buflen < sizeof(struct file)) { 1061 *sizep = where - start; 1062 return (ENOMEM); 1063 } 1064 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1065 if (error) 1066 return (error); 1067 buflen -= sizeof(struct file); 1068 where += sizeof(struct file); 1069 } 1070 *sizep = where - start; 1071 return (0); 1072 } 1073 1074 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1075 #define FILL_PERM(src, dst) do { \ 1076 (dst)._key = (src)._key; \ 1077 (dst).uid = (src).uid; \ 1078 (dst).gid = (src).gid; \ 1079 (dst).cuid = (src).cuid; \ 1080 (dst).cgid = (src).cgid; \ 1081 (dst).mode = (src).mode; \ 1082 (dst)._seq = (src)._seq; \ 1083 } while (0); 1084 #define FILL_MSG(src, dst) do { \ 1085 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1086 (dst).msg_qnum = (src).msg_qnum; \ 1087 (dst).msg_qbytes = (src).msg_qbytes; \ 1088 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1089 (dst).msg_lspid = (src).msg_lspid; \ 1090 (dst).msg_lrpid = (src).msg_lrpid; \ 1091 (dst).msg_stime = (src).msg_stime; \ 1092 (dst).msg_rtime = (src).msg_rtime; \ 1093 (dst).msg_ctime = (src).msg_ctime; \ 1094 } while (0) 1095 #define FILL_SEM(src, dst) do { \ 1096 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1097 (dst).sem_nsems = (src).sem_nsems; \ 1098 (dst).sem_otime = (src).sem_otime; \ 1099 (dst).sem_ctime = (src).sem_ctime; \ 1100 } while (0) 1101 #define FILL_SHM(src, dst) do { \ 1102 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1103 (dst).shm_segsz = (src).shm_segsz; \ 1104 (dst).shm_lpid = (src).shm_lpid; \ 1105 (dst).shm_cpid = (src).shm_cpid; \ 1106 (dst).shm_atime = (src).shm_atime; \ 1107 (dst).shm_dtime = (src).shm_dtime; \ 1108 (dst).shm_ctime = (src).shm_ctime; \ 1109 (dst).shm_nattch = (src).shm_nattch; \ 1110 } while (0) 1111 1112 static int 1113 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1114 { 1115 #ifdef SYSVMSG 1116 struct msg_sysctl_info *msgsi; 1117 #endif 1118 #ifdef SYSVSEM 1119 struct sem_sysctl_info *semsi; 1120 #endif 1121 #ifdef SYSVSHM 1122 struct shm_sysctl_info *shmsi; 1123 #endif 1124 size_t infosize, dssize, tsize, buflen; 1125 void *buf = NULL, *buf2; 1126 char *start; 1127 int32_t nds; 1128 int i, error, ret; 1129 1130 if (namelen != 1) 1131 return (EINVAL); 1132 1133 start = where; 1134 buflen = *sizep; 1135 1136 switch (*name) { 1137 case KERN_SYSVIPC_MSG_INFO: 1138 #ifdef SYSVMSG 1139 infosize = sizeof(msgsi->msginfo); 1140 nds = msginfo.msgmni; 1141 dssize = sizeof(msgsi->msgids[0]); 1142 break; 1143 #else 1144 return (EINVAL); 1145 #endif 1146 case KERN_SYSVIPC_SEM_INFO: 1147 #ifdef SYSVSEM 1148 infosize = sizeof(semsi->seminfo); 1149 nds = seminfo.semmni; 1150 dssize = sizeof(semsi->semids[0]); 1151 break; 1152 #else 1153 return (EINVAL); 1154 #endif 1155 case KERN_SYSVIPC_SHM_INFO: 1156 #ifdef SYSVSHM 1157 infosize = sizeof(shmsi->shminfo); 1158 nds = shminfo.shmmni; 1159 dssize = sizeof(shmsi->shmids[0]); 1160 break; 1161 #else 1162 return (EINVAL); 1163 #endif 1164 default: 1165 return (EINVAL); 1166 } 1167 /* 1168 * Round infosize to 64 bit boundary if requesting more than just 1169 * the info structure or getting the total data size. 1170 */ 1171 if (where == NULL || *sizep > infosize) 1172 infosize = ((infosize + 7) / 8) * 8; 1173 tsize = infosize + nds * dssize; 1174 1175 /* Return just the total size required. */ 1176 if (where == NULL) { 1177 *sizep = tsize; 1178 return (0); 1179 } 1180 1181 /* Not enough room for even the info struct. */ 1182 if (buflen < infosize) { 1183 *sizep = 0; 1184 return (ENOMEM); 1185 } 1186 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1187 memset(buf, 0, min(tsize, buflen)); 1188 1189 switch (*name) { 1190 #ifdef SYSVMSG 1191 case KERN_SYSVIPC_MSG_INFO: 1192 msgsi = (struct msg_sysctl_info *)buf; 1193 buf2 = &msgsi->msgids[0]; 1194 msgsi->msginfo = msginfo; 1195 break; 1196 #endif 1197 #ifdef SYSVSEM 1198 case KERN_SYSVIPC_SEM_INFO: 1199 semsi = (struct sem_sysctl_info *)buf; 1200 buf2 = &semsi->semids[0]; 1201 semsi->seminfo = seminfo; 1202 break; 1203 #endif 1204 #ifdef SYSVSHM 1205 case KERN_SYSVIPC_SHM_INFO: 1206 shmsi = (struct shm_sysctl_info *)buf; 1207 buf2 = &shmsi->shmids[0]; 1208 shmsi->shminfo = shminfo; 1209 break; 1210 #endif 1211 } 1212 buflen -= infosize; 1213 1214 ret = 0; 1215 if (buflen > 0) { 1216 /* Fill in the IPC data structures. */ 1217 for (i = 0; i < nds; i++) { 1218 if (buflen < dssize) { 1219 ret = ENOMEM; 1220 break; 1221 } 1222 switch (*name) { 1223 #ifdef SYSVMSG 1224 case KERN_SYSVIPC_MSG_INFO: 1225 FILL_MSG(msqids[i], msgsi->msgids[i]); 1226 break; 1227 #endif 1228 #ifdef SYSVSEM 1229 case KERN_SYSVIPC_SEM_INFO: 1230 FILL_SEM(sema[i], semsi->semids[i]); 1231 break; 1232 #endif 1233 #ifdef SYSVSHM 1234 case KERN_SYSVIPC_SHM_INFO: 1235 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1236 break; 1237 #endif 1238 } 1239 buflen -= dssize; 1240 } 1241 } 1242 *sizep -= buflen; 1243 error = copyout(buf, start, *sizep); 1244 /* If copyout succeeded, use return code set earlier. */ 1245 if (error == 0) 1246 error = ret; 1247 if (buf) 1248 free(buf, M_TEMP); 1249 return (error); 1250 } 1251 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1252 1253 static int 1254 sysctl_msgbuf(void *vwhere, size_t *sizep) 1255 { 1256 char *where = vwhere; 1257 size_t len, maxlen = *sizep; 1258 long beg, end; 1259 int error; 1260 1261 /* 1262 * deal with cases where the message buffer has 1263 * become corrupted. 1264 */ 1265 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1266 msgbufenabled = 0; 1267 return (ENXIO); 1268 } 1269 1270 if (where == NULL) { 1271 /* always return full buffer size */ 1272 *sizep = msgbufp->msg_bufs; 1273 return (0); 1274 } 1275 1276 error = 0; 1277 maxlen = min(msgbufp->msg_bufs, maxlen); 1278 1279 /* 1280 * First, copy from the write pointer to the end of 1281 * message buffer. 1282 */ 1283 beg = msgbufp->msg_bufx; 1284 end = msgbufp->msg_bufs; 1285 while (maxlen > 0) { 1286 len = min(end - beg, maxlen); 1287 if (len == 0) 1288 break; 1289 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1290 if (error) 1291 break; 1292 where += len; 1293 maxlen -= len; 1294 1295 /* 1296 * ... then, copy from the beginning of message buffer to 1297 * the write pointer. 1298 */ 1299 beg = 0; 1300 end = msgbufp->msg_bufx; 1301 } 1302 return (error); 1303 } 1304 1305 /* 1306 * try over estimating by 5 procs 1307 */ 1308 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1309 1310 static int 1311 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1312 { 1313 struct eproc eproc; 1314 struct kinfo_proc2 kproc2; 1315 struct kinfo_proc *dp; 1316 struct proc *p; 1317 const struct proclist_desc *pd; 1318 char *where, *dp2; 1319 int type, op, arg, elem_size, elem_count; 1320 int buflen, needed, error; 1321 1322 dp = vwhere; 1323 dp2 = where = vwhere; 1324 buflen = where != NULL ? *sizep : 0; 1325 error = needed = 0; 1326 type = name[0]; 1327 1328 if (type == KERN_PROC) { 1329 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1330 return (EINVAL); 1331 op = name[1]; 1332 if (op != KERN_PROC_ALL) 1333 arg = name[2]; 1334 } else { 1335 if (namelen != 5) 1336 return (EINVAL); 1337 op = name[1]; 1338 arg = name[2]; 1339 elem_size = name[3]; 1340 elem_count = name[4]; 1341 } 1342 1343 proclist_lock_read(); 1344 1345 pd = proclists; 1346 again: 1347 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1348 /* 1349 * Skip embryonic processes. 1350 */ 1351 if (p->p_stat == SIDL) 1352 continue; 1353 /* 1354 * TODO - make more efficient (see notes below). 1355 * do by session. 1356 */ 1357 switch (op) { 1358 1359 case KERN_PROC_PID: 1360 /* could do this with just a lookup */ 1361 if (p->p_pid != (pid_t)arg) 1362 continue; 1363 break; 1364 1365 case KERN_PROC_PGRP: 1366 /* could do this by traversing pgrp */ 1367 if (p->p_pgrp->pg_id != (pid_t)arg) 1368 continue; 1369 break; 1370 1371 case KERN_PROC_SESSION: 1372 if (p->p_session->s_sid != (pid_t)arg) 1373 continue; 1374 break; 1375 1376 case KERN_PROC_TTY: 1377 if (arg == KERN_PROC_TTY_REVOKE) { 1378 if ((p->p_flag & P_CONTROLT) == 0 || 1379 p->p_session->s_ttyp == NULL || 1380 p->p_session->s_ttyvp != NULL) 1381 continue; 1382 } else if ((p->p_flag & P_CONTROLT) == 0 || 1383 p->p_session->s_ttyp == NULL) { 1384 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1385 continue; 1386 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1387 continue; 1388 break; 1389 1390 case KERN_PROC_UID: 1391 if (p->p_ucred->cr_uid != (uid_t)arg) 1392 continue; 1393 break; 1394 1395 case KERN_PROC_RUID: 1396 if (p->p_cred->p_ruid != (uid_t)arg) 1397 continue; 1398 break; 1399 1400 case KERN_PROC_GID: 1401 if (p->p_ucred->cr_gid != (uid_t)arg) 1402 continue; 1403 break; 1404 1405 case KERN_PROC_RGID: 1406 if (p->p_cred->p_rgid != (uid_t)arg) 1407 continue; 1408 break; 1409 1410 case KERN_PROC_ALL: 1411 /* allow everything */ 1412 break; 1413 1414 default: 1415 error = EINVAL; 1416 goto cleanup; 1417 } 1418 if (type == KERN_PROC) { 1419 if (buflen >= sizeof(struct kinfo_proc)) { 1420 fill_eproc(p, &eproc); 1421 error = copyout((caddr_t)p, &dp->kp_proc, 1422 sizeof(struct proc)); 1423 if (error) 1424 goto cleanup; 1425 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1426 sizeof(eproc)); 1427 if (error) 1428 goto cleanup; 1429 dp++; 1430 buflen -= sizeof(struct kinfo_proc); 1431 } 1432 needed += sizeof(struct kinfo_proc); 1433 } else { /* KERN_PROC2 */ 1434 if (buflen >= elem_size && elem_count > 0) { 1435 fill_kproc2(p, &kproc2); 1436 /* 1437 * Copy out elem_size, but not larger than 1438 * the size of a struct kinfo_proc2. 1439 */ 1440 error = copyout(&kproc2, dp2, 1441 min(sizeof(kproc2), elem_size)); 1442 if (error) 1443 goto cleanup; 1444 dp2 += elem_size; 1445 buflen -= elem_size; 1446 elem_count--; 1447 } 1448 needed += elem_size; 1449 } 1450 } 1451 pd++; 1452 if (pd->pd_list != NULL) 1453 goto again; 1454 proclist_unlock_read(); 1455 1456 if (where != NULL) { 1457 if (type == KERN_PROC) 1458 *sizep = (caddr_t)dp - where; 1459 else 1460 *sizep = dp2 - where; 1461 if (needed > *sizep) 1462 return (ENOMEM); 1463 } else { 1464 needed += KERN_PROCSLOP; 1465 *sizep = needed; 1466 } 1467 return (0); 1468 cleanup: 1469 proclist_unlock_read(); 1470 return (error); 1471 } 1472 1473 /* 1474 * Fill in an eproc structure for the specified process. 1475 */ 1476 void 1477 fill_eproc(struct proc *p, struct eproc *ep) 1478 { 1479 struct tty *tp; 1480 1481 ep->e_paddr = p; 1482 ep->e_sess = p->p_session; 1483 ep->e_pcred = *p->p_cred; 1484 ep->e_ucred = *p->p_ucred; 1485 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1486 ep->e_vm.vm_rssize = 0; 1487 ep->e_vm.vm_tsize = 0; 1488 ep->e_vm.vm_dsize = 0; 1489 ep->e_vm.vm_ssize = 0; 1490 /* ep->e_vm.vm_pmap = XXX; */ 1491 } else { 1492 struct vmspace *vm = p->p_vmspace; 1493 1494 ep->e_vm.vm_rssize = vm_resident_count(vm); 1495 ep->e_vm.vm_tsize = vm->vm_tsize; 1496 ep->e_vm.vm_dsize = vm->vm_dsize; 1497 ep->e_vm.vm_ssize = vm->vm_ssize; 1498 } 1499 if (p->p_pptr) 1500 ep->e_ppid = p->p_pptr->p_pid; 1501 else 1502 ep->e_ppid = 0; 1503 ep->e_pgid = p->p_pgrp->pg_id; 1504 ep->e_sid = ep->e_sess->s_sid; 1505 ep->e_jobc = p->p_pgrp->pg_jobc; 1506 if ((p->p_flag & P_CONTROLT) && 1507 (tp = ep->e_sess->s_ttyp)) { 1508 ep->e_tdev = tp->t_dev; 1509 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1510 ep->e_tsess = tp->t_session; 1511 } else 1512 ep->e_tdev = NODEV; 1513 if (p->p_wmesg) 1514 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1515 ep->e_xsize = ep->e_xrssize = 0; 1516 ep->e_xccount = ep->e_xswrss = 0; 1517 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1518 if (SESS_LEADER(p)) 1519 ep->e_flag |= EPROC_SLEADER; 1520 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1521 } 1522 1523 /* 1524 * Fill in an eproc structure for the specified process. 1525 */ 1526 static void 1527 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1528 { 1529 struct tty *tp; 1530 1531 memset(ki, 0, sizeof(*ki)); 1532 1533 ki->p_forw = PTRTOINT64(p->p_forw); 1534 ki->p_back = PTRTOINT64(p->p_back); 1535 ki->p_paddr = PTRTOINT64(p); 1536 1537 ki->p_addr = PTRTOINT64(p->p_addr); 1538 ki->p_fd = PTRTOINT64(p->p_fd); 1539 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1540 ki->p_stats = PTRTOINT64(p->p_stats); 1541 ki->p_limit = PTRTOINT64(p->p_limit); 1542 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1543 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1544 ki->p_sess = PTRTOINT64(p->p_session); 1545 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1546 ki->p_ru = PTRTOINT64(p->p_ru); 1547 1548 ki->p_eflag = 0; 1549 ki->p_exitsig = p->p_exitsig; 1550 ki->p_flag = p->p_flag; 1551 1552 ki->p_pid = p->p_pid; 1553 if (p->p_pptr) 1554 ki->p_ppid = p->p_pptr->p_pid; 1555 else 1556 ki->p_ppid = 0; 1557 ki->p_sid = p->p_session->s_sid; 1558 ki->p__pgid = p->p_pgrp->pg_id; 1559 1560 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1561 1562 ki->p_uid = p->p_ucred->cr_uid; 1563 ki->p_ruid = p->p_cred->p_ruid; 1564 ki->p_gid = p->p_ucred->cr_gid; 1565 ki->p_rgid = p->p_cred->p_rgid; 1566 1567 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1568 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1569 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1570 1571 ki->p_jobc = p->p_pgrp->pg_jobc; 1572 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1573 ki->p_tdev = tp->t_dev; 1574 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1575 ki->p_tsess = PTRTOINT64(tp->t_session); 1576 } else { 1577 ki->p_tdev = NODEV; 1578 } 1579 1580 ki->p_estcpu = p->p_estcpu; 1581 ki->p_rtime_sec = p->p_rtime.tv_sec; 1582 ki->p_rtime_usec = p->p_rtime.tv_usec; 1583 ki->p_cpticks = p->p_cpticks; 1584 ki->p_pctcpu = p->p_pctcpu; 1585 ki->p_swtime = p->p_swtime; 1586 ki->p_slptime = p->p_slptime; 1587 if (p->p_stat == SONPROC) { 1588 KDASSERT(p->p_cpu != NULL); 1589 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1590 } else 1591 ki->p_schedflags = 0; 1592 1593 ki->p_uticks = p->p_uticks; 1594 ki->p_sticks = p->p_sticks; 1595 ki->p_iticks = p->p_iticks; 1596 1597 ki->p_tracep = PTRTOINT64(p->p_tracep); 1598 ki->p_traceflag = p->p_traceflag; 1599 1600 ki->p_holdcnt = p->p_holdcnt; 1601 1602 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1603 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1604 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1605 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1606 1607 ki->p_stat = p->p_stat; 1608 ki->p_priority = p->p_priority; 1609 ki->p_usrpri = p->p_usrpri; 1610 ki->p_nice = p->p_nice; 1611 1612 ki->p_xstat = p->p_xstat; 1613 ki->p_acflag = p->p_acflag; 1614 1615 strncpy(ki->p_comm, p->p_comm, 1616 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1617 1618 if (p->p_wmesg) 1619 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1620 ki->p_wchan = PTRTOINT64(p->p_wchan); 1621 1622 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1623 1624 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1625 ki->p_vm_rssize = 0; 1626 ki->p_vm_tsize = 0; 1627 ki->p_vm_dsize = 0; 1628 ki->p_vm_ssize = 0; 1629 } else { 1630 struct vmspace *vm = p->p_vmspace; 1631 1632 ki->p_vm_rssize = vm_resident_count(vm); 1633 ki->p_vm_tsize = vm->vm_tsize; 1634 ki->p_vm_dsize = vm->vm_dsize; 1635 ki->p_vm_ssize = vm->vm_ssize; 1636 } 1637 1638 if (p->p_session->s_ttyvp) 1639 ki->p_eflag |= EPROC_CTTY; 1640 if (SESS_LEADER(p)) 1641 ki->p_eflag |= EPROC_SLEADER; 1642 1643 /* XXX Is this double check necessary? */ 1644 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1645 ki->p_uvalid = 0; 1646 } else { 1647 ki->p_uvalid = 1; 1648 1649 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1650 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1651 1652 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1653 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1654 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1655 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1656 1657 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1658 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1659 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1660 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1661 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1662 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1663 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1664 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1665 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1666 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1667 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1668 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1669 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1670 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1671 1672 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1673 p->p_stats->p_cru.ru_stime.tv_sec; 1674 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1675 p->p_stats->p_cru.ru_stime.tv_usec; 1676 } 1677 #ifdef MULTIPROCESSOR 1678 if (p->p_cpu != NULL) 1679 ki->p_cpuid = p->p_cpu->ci_cpuid; 1680 else 1681 #endif 1682 ki->p_cpuid = KI_NOCPU; 1683 } 1684 1685 int 1686 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1687 struct proc *up) 1688 { 1689 struct ps_strings pss; 1690 struct proc *p; 1691 size_t len, upper_bound, xlen; 1692 struct uio auio; 1693 struct iovec aiov; 1694 vaddr_t argv; 1695 pid_t pid; 1696 int nargv, type, error, i; 1697 char *arg; 1698 char *tmp; 1699 1700 if (namelen != 2) 1701 return (EINVAL); 1702 pid = name[0]; 1703 type = name[1]; 1704 1705 switch (type) { 1706 case KERN_PROC_ARGV: 1707 case KERN_PROC_NARGV: 1708 case KERN_PROC_ENV: 1709 case KERN_PROC_NENV: 1710 /* ok */ 1711 break; 1712 default: 1713 return (EINVAL); 1714 } 1715 1716 /* check pid */ 1717 if ((p = pfind(pid)) == NULL) 1718 return (EINVAL); 1719 1720 /* only root or same user change look at the environment */ 1721 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1722 if (up->p_ucred->cr_uid != 0) { 1723 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1724 up->p_cred->p_ruid != p->p_cred->p_svuid) 1725 return (EPERM); 1726 } 1727 } 1728 1729 if (sizep != NULL && where == NULL) { 1730 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1731 *sizep = sizeof (int); 1732 else 1733 *sizep = ARG_MAX; /* XXX XXX XXX */ 1734 return (0); 1735 } 1736 if (where == NULL || sizep == NULL) 1737 return (EINVAL); 1738 1739 /* 1740 * Zombies don't have a stack, so we can't read their psstrings. 1741 * System processes also don't have a user stack. 1742 */ 1743 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1744 return (EINVAL); 1745 1746 /* 1747 * Lock the process down in memory. 1748 */ 1749 /* XXXCDC: how should locking work here? */ 1750 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1751 return (EFAULT); 1752 p->p_vmspace->vm_refcnt++; /* XXX */ 1753 1754 /* 1755 * Allocate a temporary buffer to hold the arguments. 1756 */ 1757 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1758 1759 /* 1760 * Read in the ps_strings structure. 1761 */ 1762 aiov.iov_base = &pss; 1763 aiov.iov_len = sizeof(pss); 1764 auio.uio_iov = &aiov; 1765 auio.uio_iovcnt = 1; 1766 auio.uio_offset = (vaddr_t)p->p_psstr; 1767 auio.uio_resid = sizeof(pss); 1768 auio.uio_segflg = UIO_SYSSPACE; 1769 auio.uio_rw = UIO_READ; 1770 auio.uio_procp = NULL; 1771 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1772 if (error) 1773 goto done; 1774 1775 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1776 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1777 else 1778 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1779 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1780 error = copyout(&nargv, where, sizeof(nargv)); 1781 *sizep = sizeof(nargv); 1782 goto done; 1783 } 1784 /* 1785 * Now read the address of the argument vector. 1786 */ 1787 switch (type) { 1788 case KERN_PROC_ARGV: 1789 /* XXX compat32 stuff here */ 1790 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1791 break; 1792 case KERN_PROC_ENV: 1793 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1794 break; 1795 default: 1796 return (EINVAL); 1797 } 1798 auio.uio_offset = (off_t)(long)tmp; 1799 aiov.iov_base = &argv; 1800 aiov.iov_len = sizeof(argv); 1801 auio.uio_iov = &aiov; 1802 auio.uio_iovcnt = 1; 1803 auio.uio_resid = sizeof(argv); 1804 auio.uio_segflg = UIO_SYSSPACE; 1805 auio.uio_rw = UIO_READ; 1806 auio.uio_procp = NULL; 1807 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1808 if (error) 1809 goto done; 1810 1811 /* 1812 * Now copy in the actual argument vector, one page at a time, 1813 * since we don't know how long the vector is (though, we do 1814 * know how many NUL-terminated strings are in the vector). 1815 */ 1816 len = 0; 1817 upper_bound = *sizep; 1818 for (; nargv != 0 && len < upper_bound; len += xlen) { 1819 aiov.iov_base = arg; 1820 aiov.iov_len = PAGE_SIZE; 1821 auio.uio_iov = &aiov; 1822 auio.uio_iovcnt = 1; 1823 auio.uio_offset = argv + len; 1824 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1825 auio.uio_resid = xlen; 1826 auio.uio_segflg = UIO_SYSSPACE; 1827 auio.uio_rw = UIO_READ; 1828 auio.uio_procp = NULL; 1829 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1830 if (error) 1831 goto done; 1832 1833 for (i = 0; i < xlen && nargv != 0; i++) { 1834 if (arg[i] == '\0') 1835 nargv--; /* one full string */ 1836 } 1837 1838 /* make sure we don't copyout past the end of the user's buffer */ 1839 if (len + i > upper_bound) 1840 i = upper_bound - len; 1841 1842 error = copyout(arg, (char *)where + len, i); 1843 if (error) 1844 break; 1845 1846 if (nargv == 0) { 1847 len += i; 1848 break; 1849 } 1850 } 1851 *sizep = len; 1852 1853 done: 1854 uvmspace_free(p->p_vmspace); 1855 1856 free(arg, M_TEMP); 1857 return (error); 1858 } 1859 1860 #if NPTY > 0 1861 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1862 1863 /* 1864 * Validate parameters and get old / set new parameters 1865 * for pty sysctl function. 1866 */ 1867 static int 1868 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 1869 { 1870 int error = 0; 1871 int oldmax = 0, newmax = 0; 1872 1873 /* get current value of maxptys */ 1874 oldmax = pty_maxptys(0, 0); 1875 1876 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1877 1878 if (!error && newp) { 1879 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1880 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1881 1882 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1883 return (EINVAL); 1884 1885 } 1886 1887 return (error); 1888 } 1889 #endif /* NPTY > 0 */ 1890 1891 static int 1892 sysctl_dotkstat(name, namelen, where, sizep, newp) 1893 int *name; 1894 u_int namelen; 1895 void *where; 1896 size_t *sizep; 1897 void *newp; 1898 { 1899 /* all sysctl names at this level are terminal */ 1900 if (namelen != 1) 1901 return (ENOTDIR); /* overloaded */ 1902 1903 switch (name[0]) { 1904 case KERN_TKSTAT_NIN: 1905 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 1906 case KERN_TKSTAT_NOUT: 1907 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 1908 case KERN_TKSTAT_CANCC: 1909 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 1910 case KERN_TKSTAT_RAWCC: 1911 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 1912 default: 1913 return (EOPNOTSUPP); 1914 } 1915 } 1916
Indexes created Tue Sep 30 07:10:03 GMT 2025