kern_sysctl.c revision 1.83
1 /* $NetBSD: kern_sysctl.c,v 1.83 2000/11/19 01:34:58 sommerfeld Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95 39 */ 40 41 /* 42 * sysctl system call. 43 */ 44 45 #include "opt_ddb.h" 46 #include "opt_insecure.h" 47 #include "opt_defcorename.h" 48 #include "opt_sysv.h" 49 #include "pty.h" 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/kernel.h> 54 #include <sys/buf.h> 55 #include <sys/device.h> 56 #include <sys/disklabel.h> 57 #include <sys/dkstat.h> 58 #include <sys/exec.h> 59 #include <sys/file.h> 60 #include <sys/ioctl.h> 61 #include <sys/malloc.h> 62 #include <sys/mount.h> 63 #include <sys/msgbuf.h> 64 #include <sys/pool.h> 65 #include <sys/proc.h> 66 #include <sys/resource.h> 67 #include <sys/resourcevar.h> 68 #include <sys/syscallargs.h> 69 #include <sys/tty.h> 70 #include <sys/unistd.h> 71 #include <sys/vnode.h> 72 #define __SYSCTL_PRIVATE 73 #include <sys/sysctl.h> 74 #include <sys/lock.h> 75 76 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 77 #include <sys/ipc.h> 78 #endif 79 #ifdef SYSVMSG 80 #include <sys/msg.h> 81 #endif 82 #ifdef SYSVSEM 83 #include <sys/sem.h> 84 #endif 85 #ifdef SYSVSHM 86 #include <sys/shm.h> 87 #endif 88 89 #include <dev/cons.h> 90 91 #if defined(DDB) 92 #include <ddb/ddbvar.h> 93 #endif 94 95 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 96 97 static int sysctl_file __P((void *, size_t *)); 98 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 99 static int sysctl_sysvipc __P((int *, u_int, void *, size_t *)); 100 #endif 101 static int sysctl_msgbuf __P((void *, size_t *)); 102 static int sysctl_doeproc __P((int *, u_int, void *, size_t *)); 103 #ifdef MULTIPROCESSOR 104 static int sysctl_docptime __P((void *, size_t *, void *)); 105 #endif 106 static void fill_kproc2 __P((struct proc *, struct kinfo_proc2 *)); 107 static int sysctl_procargs __P((int *, u_int, void *, size_t *, struct proc *)); 108 #if NPTY > 0 109 static int sysctl_pty __P((void *, size_t *, void *, size_t)); 110 #endif 111 112 /* 113 * The `sysctl_memlock' is intended to keep too many processes from 114 * locking down memory by doing sysctls at once. Whether or not this 115 * is really a good idea to worry about it probably a subject of some 116 * debate. 117 */ 118 struct lock sysctl_memlock; 119 120 void 121 sysctl_init(void) 122 { 123 124 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 125 } 126 127 int 128 sys___sysctl(p, v, retval) 129 struct proc *p; 130 void *v; 131 register_t *retval; 132 { 133 struct sys___sysctl_args /* { 134 syscallarg(int *) name; 135 syscallarg(u_int) namelen; 136 syscallarg(void *) old; 137 syscallarg(size_t *) oldlenp; 138 syscallarg(void *) new; 139 syscallarg(size_t) newlen; 140 } */ *uap = v; 141 int error; 142 size_t savelen = 0, oldlen = 0; 143 sysctlfn *fn; 144 int name[CTL_MAXNAME]; 145 size_t *oldlenp; 146 147 /* 148 * all top-level sysctl names are non-terminal 149 */ 150 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 151 return (EINVAL); 152 error = copyin(SCARG(uap, name), &name, 153 SCARG(uap, namelen) * sizeof(int)); 154 if (error) 155 return (error); 156 157 /* 158 * For all but CTL_PROC, must be root to change a value. 159 * For CTL_PROC, must be root, or owner of the proc (and not suid), 160 * this is checked in proc_sysctl() (once we know the targer proc). 161 */ 162 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 163 (error = suser(p->p_ucred, &p->p_acflag))) 164 return error; 165 166 switch (name[0]) { 167 case CTL_KERN: 168 fn = kern_sysctl; 169 break; 170 case CTL_HW: 171 fn = hw_sysctl; 172 break; 173 case CTL_VM: 174 fn = uvm_sysctl; 175 break; 176 case CTL_NET: 177 fn = net_sysctl; 178 break; 179 case CTL_VFS: 180 fn = vfs_sysctl; 181 break; 182 case CTL_MACHDEP: 183 fn = cpu_sysctl; 184 break; 185 #ifdef DEBUG 186 case CTL_DEBUG: 187 fn = debug_sysctl; 188 break; 189 #endif 190 #ifdef DDB 191 case CTL_DDB: 192 fn = ddb_sysctl; 193 break; 194 #endif 195 case CTL_PROC: 196 fn = proc_sysctl; 197 break; 198 default: 199 return (EOPNOTSUPP); 200 } 201 202 /* 203 * XXX Hey, we wire `old', but what about `new'? 204 */ 205 206 oldlenp = SCARG(uap, oldlenp); 207 if (oldlenp) { 208 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 209 return (error); 210 oldlenp = &oldlen; 211 } 212 if (SCARG(uap, old) != NULL) { 213 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 214 if (error) 215 return (error); 216 if (uvm_vslock(p, SCARG(uap, old), oldlen, 217 VM_PROT_READ|VM_PROT_WRITE) != KERN_SUCCESS) { 218 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 219 return (EFAULT); 220 } 221 savelen = oldlen; 222 } 223 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 224 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 225 if (SCARG(uap, old) != NULL) { 226 uvm_vsunlock(p, SCARG(uap, old), savelen); 227 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 228 } 229 if (error) 230 return (error); 231 if (SCARG(uap, oldlenp)) 232 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 233 return (error); 234 } 235 236 /* 237 * Attributes stored in the kernel. 238 */ 239 char hostname[MAXHOSTNAMELEN]; 240 int hostnamelen; 241 242 char domainname[MAXHOSTNAMELEN]; 243 int domainnamelen; 244 245 long hostid; 246 247 #ifdef INSECURE 248 int securelevel = -1; 249 #else 250 int securelevel = 0; 251 #endif 252 253 #ifndef DEFCORENAME 254 #define DEFCORENAME "%n.core" 255 #endif 256 char defcorename[MAXPATHLEN] = DEFCORENAME; 257 int defcorenamelen = sizeof(DEFCORENAME); 258 259 extern int kern_logsigexit; 260 extern fixpt_t ccpu; 261 262 #ifdef MULTIPROCESSOR 263 264 #ifndef CPU_INFO_FOREACH 265 #define CPU_INFO_ITERATOR int 266 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 267 #endif 268 269 static int 270 sysctl_docptime(oldp, oldlenp, newp) 271 void *oldp; 272 size_t *oldlenp; 273 void *newp; 274 { 275 u_int64_t cp_time[CPUSTATES]; 276 int i; 277 struct cpu_info *ci; 278 CPU_INFO_ITERATOR cii; 279 280 for (i=0; i<CPUSTATES; i++) 281 cp_time[i] = 0; 282 283 for (CPU_INFO_FOREACH(cii, ci)) { 284 for (i=0; i<CPUSTATES; i++) 285 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 286 } 287 return (sysctl_rdstruct(oldp, oldlenp, newp, 288 cp_time, sizeof(cp_time))); 289 } 290 #endif 291 292 /* 293 * kernel related system variables. 294 */ 295 int 296 kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 297 int *name; 298 u_int namelen; 299 void *oldp; 300 size_t *oldlenp; 301 void *newp; 302 size_t newlen; 303 struct proc *p; 304 { 305 int error, level, inthostid; 306 int old_autonicetime; 307 int old_vnodes; 308 dev_t consdev; 309 310 /* All sysctl names at this level, except for a few, are terminal. */ 311 switch (name[0]) { 312 case KERN_PROC: 313 case KERN_PROC2: 314 case KERN_PROF: 315 case KERN_MBUF: 316 case KERN_PROC_ARGS: 317 case KERN_SYSVIPC_INFO: 318 /* Not terminal. */ 319 break; 320 default: 321 if (namelen != 1) 322 return (ENOTDIR); /* overloaded */ 323 } 324 325 switch (name[0]) { 326 case KERN_OSTYPE: 327 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 328 case KERN_OSRELEASE: 329 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 330 case KERN_OSREV: 331 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 332 case KERN_VERSION: 333 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 334 case KERN_MAXVNODES: 335 old_vnodes = desiredvnodes; 336 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 337 if (old_vnodes > desiredvnodes) { 338 desiredvnodes = old_vnodes; 339 return (EINVAL); 340 } 341 return (error); 342 case KERN_MAXPROC: 343 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 344 case KERN_MAXFILES: 345 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 346 case KERN_ARGMAX: 347 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 348 case KERN_SECURELVL: 349 level = securelevel; 350 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 351 newp == NULL) 352 return (error); 353 if (level < securelevel && p->p_pid != 1) 354 return (EPERM); 355 securelevel = level; 356 return (0); 357 case KERN_HOSTNAME: 358 error = sysctl_string(oldp, oldlenp, newp, newlen, 359 hostname, sizeof(hostname)); 360 if (newp && !error) 361 hostnamelen = newlen; 362 return (error); 363 case KERN_DOMAINNAME: 364 error = sysctl_string(oldp, oldlenp, newp, newlen, 365 domainname, sizeof(domainname)); 366 if (newp && !error) 367 domainnamelen = newlen; 368 return (error); 369 case KERN_HOSTID: 370 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 371 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 372 hostid = inthostid; 373 return (error); 374 case KERN_CLOCKRATE: 375 return (sysctl_clockrate(oldp, oldlenp)); 376 case KERN_BOOTTIME: 377 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 378 sizeof(struct timeval))); 379 case KERN_VNODE: 380 return (sysctl_vnode(oldp, oldlenp, p)); 381 case KERN_PROC: 382 case KERN_PROC2: 383 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 384 case KERN_PROC_ARGS: 385 return (sysctl_procargs(name + 1, namelen - 1, 386 oldp, oldlenp, p)); 387 case KERN_FILE: 388 return (sysctl_file(oldp, oldlenp)); 389 #ifdef GPROF 390 case KERN_PROF: 391 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 392 newp, newlen)); 393 #endif 394 case KERN_POSIX1: 395 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 396 case KERN_NGROUPS: 397 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 398 case KERN_JOB_CONTROL: 399 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 400 case KERN_SAVED_IDS: 401 #ifdef _POSIX_SAVED_IDS 402 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 403 #else 404 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 405 #endif 406 case KERN_MAXPARTITIONS: 407 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 408 case KERN_RAWPARTITION: 409 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 410 #ifdef NTP 411 case KERN_NTPTIME: 412 return (sysctl_ntptime(oldp, oldlenp)); 413 #endif 414 case KERN_AUTONICETIME: 415 old_autonicetime = autonicetime; 416 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 417 if (autonicetime < 0) 418 autonicetime = old_autonicetime; 419 return (error); 420 case KERN_AUTONICEVAL: 421 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 422 if (autoniceval < PRIO_MIN) 423 autoniceval = PRIO_MIN; 424 if (autoniceval > PRIO_MAX) 425 autoniceval = PRIO_MAX; 426 return (error); 427 case KERN_RTC_OFFSET: 428 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 429 case KERN_ROOT_DEVICE: 430 return (sysctl_rdstring(oldp, oldlenp, newp, 431 root_device->dv_xname)); 432 case KERN_MSGBUFSIZE: 433 /* 434 * deal with cases where the message buffer has 435 * become corrupted. 436 */ 437 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 438 msgbufenabled = 0; 439 return (ENXIO); 440 } 441 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 442 case KERN_FSYNC: 443 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 444 case KERN_SYSVMSG: 445 #ifdef SYSVMSG 446 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 447 #else 448 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 449 #endif 450 case KERN_SYSVSEM: 451 #ifdef SYSVSEM 452 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 453 #else 454 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 455 #endif 456 case KERN_SYSVSHM: 457 #ifdef SYSVSHM 458 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 459 #else 460 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 461 #endif 462 case KERN_DEFCORENAME: 463 if (newp && newlen < 1) 464 return (EINVAL); 465 error = sysctl_string(oldp, oldlenp, newp, newlen, 466 defcorename, sizeof(defcorename)); 467 if (newp && !error) 468 defcorenamelen = newlen; 469 return (error); 470 case KERN_SYNCHRONIZED_IO: 471 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 472 case KERN_IOV_MAX: 473 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 474 case KERN_MBUF: 475 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 476 newp, newlen)); 477 case KERN_MAPPED_FILES: 478 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 479 case KERN_MEMLOCK: 480 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 481 case KERN_MEMLOCK_RANGE: 482 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 483 case KERN_MEMORY_PROTECTION: 484 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 485 case KERN_LOGIN_NAME_MAX: 486 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 487 case KERN_LOGSIGEXIT: 488 return (sysctl_int(oldp, oldlenp, newp, newlen, 489 &kern_logsigexit)); 490 case KERN_FSCALE: 491 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 492 case KERN_CCPU: 493 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 494 case KERN_CP_TIME: 495 #ifndef MULTIPROCESSOR 496 return (sysctl_rdstruct(oldp, oldlenp, newp, 497 curcpu()->ci_schedstate.spc_cp_time, 498 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 499 #else 500 return (sysctl_docptime(oldp, oldlenp, newp)); 501 #endif 502 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 503 case KERN_SYSVIPC_INFO: 504 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 505 #endif 506 case KERN_MSGBUF: 507 return (sysctl_msgbuf(oldp, oldlenp)); 508 case KERN_CONSDEV: 509 if (cn_tab != NULL) 510 consdev = cn_tab->cn_dev; 511 else 512 consdev = NODEV; 513 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 514 sizeof consdev)); 515 #if NPTY > 0 516 case KERN_MAXPTYS: 517 return sysctl_pty(oldp, oldlenp, newp, newlen); 518 #endif 519 default: 520 return (EOPNOTSUPP); 521 } 522 /* NOTREACHED */ 523 } 524 525 /* 526 * hardware related system variables. 527 */ 528 int 529 hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 530 int *name; 531 u_int namelen; 532 void *oldp; 533 size_t *oldlenp; 534 void *newp; 535 size_t newlen; 536 struct proc *p; 537 { 538 539 /* all sysctl names at this level are terminal */ 540 if (namelen != 1) 541 return (ENOTDIR); /* overloaded */ 542 543 switch (name[0]) { 544 case HW_MACHINE: 545 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 546 case HW_MACHINE_ARCH: 547 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 548 case HW_MODEL: 549 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 550 case HW_NCPU: 551 return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */ 552 case HW_BYTEORDER: 553 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 554 case HW_PHYSMEM: 555 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 556 case HW_USERMEM: 557 return (sysctl_rdint(oldp, oldlenp, newp, 558 ctob(physmem - uvmexp.wired))); 559 case HW_PAGESIZE: 560 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 561 case HW_ALIGNBYTES: 562 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 563 case HW_CNMAGIC: { 564 char magic[CNS_LEN]; 565 int error; 566 567 if (oldp) 568 cn_get_magic(magic, CNS_LEN); 569 error = sysctl_string(oldp, oldlenp, newp, newlen, 570 magic, sizeof(magic)); 571 if (newp && !error) { 572 error = cn_set_magic(magic); 573 } 574 return (error); 575 } 576 default: 577 return (EOPNOTSUPP); 578 } 579 /* NOTREACHED */ 580 } 581 582 #ifdef DEBUG 583 /* 584 * Debugging related system variables. 585 */ 586 struct ctldebug debug0, debug1, debug2, debug3, debug4; 587 struct ctldebug debug5, debug6, debug7, debug8, debug9; 588 struct ctldebug debug10, debug11, debug12, debug13, debug14; 589 struct ctldebug debug15, debug16, debug17, debug18, debug19; 590 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 591 &debug0, &debug1, &debug2, &debug3, &debug4, 592 &debug5, &debug6, &debug7, &debug8, &debug9, 593 &debug10, &debug11, &debug12, &debug13, &debug14, 594 &debug15, &debug16, &debug17, &debug18, &debug19, 595 }; 596 int 597 debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 598 int *name; 599 u_int namelen; 600 void *oldp; 601 size_t *oldlenp; 602 void *newp; 603 size_t newlen; 604 struct proc *p; 605 { 606 struct ctldebug *cdp; 607 608 /* all sysctl names at this level are name and field */ 609 if (namelen != 2) 610 return (ENOTDIR); /* overloaded */ 611 cdp = debugvars[name[0]]; 612 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 613 return (EOPNOTSUPP); 614 switch (name[1]) { 615 case CTL_DEBUG_NAME: 616 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 617 case CTL_DEBUG_VALUE: 618 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 619 default: 620 return (EOPNOTSUPP); 621 } 622 /* NOTREACHED */ 623 } 624 #endif /* DEBUG */ 625 626 int 627 proc_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 proc *ptmp = NULL; 637 const struct proclist_desc *pd; 638 int error = 0; 639 struct rlimit alim; 640 struct plimit *newplim; 641 char *tmps = NULL; 642 int i, curlen, len; 643 644 if (namelen < 2) 645 return EINVAL; 646 647 if (name[0] == PROC_CURPROC) { 648 ptmp = p; 649 } else { 650 proclist_lock_read(); 651 for (pd = proclists; pd->pd_list != NULL; pd++) { 652 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 653 ptmp = LIST_NEXT(ptmp, p_list)) { 654 /* Skip embryonic processes. */ 655 if (ptmp->p_stat == SIDL) 656 continue; 657 if (ptmp->p_pid == (pid_t)name[0]) 658 break; 659 } 660 if (ptmp != NULL) 661 break; 662 } 663 proclist_unlock_read(); 664 if (ptmp == NULL) 665 return(ESRCH); 666 if (p->p_ucred->cr_uid != 0) { 667 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 668 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 669 return EPERM; 670 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 671 return EPERM; /* sgid proc */ 672 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 673 if (p->p_ucred->cr_groups[i] == 674 ptmp->p_cred->p_rgid) 675 break; 676 } 677 if (i == p->p_ucred->cr_ngroups) 678 return EPERM; 679 } 680 } 681 if (name[1] == PROC_PID_CORENAME) { 682 if (namelen != 2) 683 return EINVAL; 684 /* 685 * Can't use sysctl_string() here because we may malloc a new 686 * area during the process, so we have to do it by hand. 687 */ 688 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 689 if (oldlenp && *oldlenp < curlen) { 690 if (!oldp) 691 *oldlenp = curlen; 692 return (ENOMEM); 693 } 694 if (newp) { 695 if (securelevel > 2) 696 return EPERM; 697 if (newlen > MAXPATHLEN) 698 return ENAMETOOLONG; 699 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 700 if (tmps == NULL) 701 return ENOMEM; 702 error = copyin(newp, tmps, newlen + 1); 703 tmps[newlen] = '\0'; 704 if (error) 705 goto cleanup; 706 /* Enforce to be either 'core' for end with '.core' */ 707 if (newlen < 4) { /* c.o.r.e */ 708 error = EINVAL; 709 goto cleanup; 710 } 711 len = newlen - 4; 712 if (len > 0) { 713 if (tmps[len - 1] != '.' && 714 tmps[len - 1] != '/') { 715 error = EINVAL; 716 goto cleanup; 717 } 718 } 719 if (strcmp(&tmps[len], "core") != 0) { 720 error = EINVAL; 721 goto cleanup; 722 } 723 } 724 if (oldp && oldlenp) { 725 *oldlenp = curlen; 726 error = copyout(ptmp->p_limit->pl_corename, oldp, 727 curlen); 728 } 729 if (newp && error == 0) { 730 /* if the 2 strings are identical, don't limcopy() */ 731 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 732 error = 0; 733 goto cleanup; 734 } 735 if (ptmp->p_limit->p_refcnt > 1 && 736 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 737 newplim = limcopy(ptmp->p_limit); 738 limfree(ptmp->p_limit); 739 ptmp->p_limit = newplim; 740 } else if (ptmp->p_limit->pl_corename != defcorename) { 741 free(ptmp->p_limit->pl_corename, M_TEMP); 742 } 743 ptmp->p_limit->pl_corename = tmps; 744 return (0); 745 } 746 cleanup: 747 if (tmps) 748 free(tmps, M_TEMP); 749 return (error); 750 } 751 if (name[1] == PROC_PID_LIMIT) { 752 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 753 return EINVAL; 754 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 755 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 756 error = sysctl_quad(oldp, oldlenp, newp, newlen, 757 &alim.rlim_max); 758 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 759 error = sysctl_quad(oldp, oldlenp, newp, newlen, 760 &alim.rlim_cur); 761 else 762 error = EINVAL; 763 764 if (error) 765 return error; 766 767 if (newp) 768 error = dosetrlimit(ptmp, p->p_cred, 769 name[2] - 1, &alim); 770 return error; 771 } 772 return (EINVAL); 773 } 774 775 /* 776 * Convenience macros. 777 */ 778 779 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 780 if (oldlenp) { \ 781 if (!oldp) \ 782 *oldlenp = len; \ 783 else { \ 784 if (*oldlenp < len) \ 785 return(ENOMEM); \ 786 *oldlenp = len; \ 787 error = copyout((caddr_t)valp, oldp, len); \ 788 } \ 789 } 790 791 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 792 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 793 794 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 795 if (newp && newlen != len) \ 796 return (EINVAL); 797 798 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 799 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 800 801 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 802 if (error == 0 && newp) \ 803 error = copyin(newp, valp, len); 804 805 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 806 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 807 808 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 809 if (oldlenp) { \ 810 len = strlen(str) + 1; \ 811 if (!oldp) \ 812 *oldlenp = len; \ 813 else { \ 814 if (*oldlenp < len) { \ 815 err2 = ENOMEM; \ 816 len = *oldlenp; \ 817 } else \ 818 *oldlenp = len; \ 819 error = copyout(str, oldp, len);\ 820 if (error == 0) \ 821 error = err2; \ 822 } \ 823 } 824 825 /* 826 * Validate parameters and get old / set new parameters 827 * for an integer-valued sysctl function. 828 */ 829 int 830 sysctl_int(oldp, oldlenp, newp, newlen, valp) 831 void *oldp; 832 size_t *oldlenp; 833 void *newp; 834 size_t newlen; 835 int *valp; 836 { 837 int error = 0; 838 839 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 840 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 841 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 842 843 return (error); 844 } 845 846 847 /* 848 * As above, but read-only. 849 */ 850 int 851 sysctl_rdint(oldp, oldlenp, newp, val) 852 void *oldp; 853 size_t *oldlenp; 854 void *newp; 855 int val; 856 { 857 int error = 0; 858 859 if (newp) 860 return (EPERM); 861 862 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 863 864 return (error); 865 } 866 867 /* 868 * Validate parameters and get old / set new parameters 869 * for an quad-valued sysctl function. 870 */ 871 int 872 sysctl_quad(oldp, oldlenp, newp, newlen, valp) 873 void *oldp; 874 size_t *oldlenp; 875 void *newp; 876 size_t newlen; 877 quad_t *valp; 878 { 879 int error = 0; 880 881 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 882 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 883 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 884 885 return (error); 886 } 887 888 /* 889 * As above, but read-only. 890 */ 891 int 892 sysctl_rdquad(oldp, oldlenp, newp, val) 893 void *oldp; 894 size_t *oldlenp; 895 void *newp; 896 quad_t val; 897 { 898 int error = 0; 899 900 if (newp) 901 return (EPERM); 902 903 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 904 905 return (error); 906 } 907 908 /* 909 * Validate parameters and get old / set new parameters 910 * for a string-valued sysctl function. 911 */ 912 int 913 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 914 void *oldp; 915 size_t *oldlenp; 916 void *newp; 917 size_t newlen; 918 char *str; 919 int maxlen; 920 { 921 int len, error = 0, err2 = 0; 922 923 if (newp && newlen >= maxlen) 924 return (EINVAL); 925 926 SYSCTL_STRING_CORE(oldp, oldlenp, str); 927 928 if (error == 0 && newp) { 929 error = copyin(newp, str, newlen); 930 str[newlen] = 0; 931 } 932 return (error); 933 } 934 935 /* 936 * As above, but read-only. 937 */ 938 int 939 sysctl_rdstring(oldp, oldlenp, newp, str) 940 void *oldp; 941 size_t *oldlenp; 942 void *newp; 943 const char *str; 944 { 945 int len, error = 0, err2 = 0; 946 947 if (newp) 948 return (EPERM); 949 950 SYSCTL_STRING_CORE(oldp, oldlenp, str); 951 952 return (error); 953 } 954 955 /* 956 * Validate parameters and get old / set new parameters 957 * for a structure oriented sysctl function. 958 */ 959 int 960 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 961 void *oldp; 962 size_t *oldlenp; 963 void *newp; 964 size_t newlen; 965 void *sp; 966 int len; 967 { 968 int error = 0; 969 970 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 971 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 972 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 973 974 return (error); 975 } 976 977 /* 978 * Validate parameters and get old parameters 979 * for a structure oriented sysctl function. 980 */ 981 int 982 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 983 void *oldp; 984 size_t *oldlenp; 985 void *newp; 986 const void *sp; 987 int len; 988 { 989 int error = 0; 990 991 if (newp) 992 return (EPERM); 993 994 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 995 996 return (error); 997 } 998 999 /* 1000 * Get file structures. 1001 */ 1002 static int 1003 sysctl_file(vwhere, sizep) 1004 void *vwhere; 1005 size_t *sizep; 1006 { 1007 int buflen, error; 1008 struct file *fp; 1009 char *start, *where; 1010 1011 start = where = vwhere; 1012 buflen = *sizep; 1013 if (where == NULL) { 1014 /* 1015 * overestimate by 10 files 1016 */ 1017 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1018 return (0); 1019 } 1020 1021 /* 1022 * first copyout filehead 1023 */ 1024 if (buflen < sizeof(filehead)) { 1025 *sizep = 0; 1026 return (0); 1027 } 1028 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1029 if (error) 1030 return (error); 1031 buflen -= sizeof(filehead); 1032 where += sizeof(filehead); 1033 1034 /* 1035 * followed by an array of file structures 1036 */ 1037 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1038 if (buflen < sizeof(struct file)) { 1039 *sizep = where - start; 1040 return (ENOMEM); 1041 } 1042 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1043 if (error) 1044 return (error); 1045 buflen -= sizeof(struct file); 1046 where += sizeof(struct file); 1047 } 1048 *sizep = where - start; 1049 return (0); 1050 } 1051 1052 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1053 #define FILL_PERM(src, dst) do { \ 1054 (dst)._key = (src)._key; \ 1055 (dst).uid = (src).uid; \ 1056 (dst).gid = (src).gid; \ 1057 (dst).cuid = (src).cuid; \ 1058 (dst).cgid = (src).cgid; \ 1059 (dst).mode = (src).mode; \ 1060 (dst)._seq = (src)._seq; \ 1061 } while (0); 1062 #define FILL_MSG(src, dst) do { \ 1063 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1064 (dst).msg_qnum = (src).msg_qnum; \ 1065 (dst).msg_qbytes = (src).msg_qbytes; \ 1066 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1067 (dst).msg_lspid = (src).msg_lspid; \ 1068 (dst).msg_lrpid = (src).msg_lrpid; \ 1069 (dst).msg_stime = (src).msg_stime; \ 1070 (dst).msg_rtime = (src).msg_rtime; \ 1071 (dst).msg_ctime = (src).msg_ctime; \ 1072 } while (0) 1073 #define FILL_SEM(src, dst) do { \ 1074 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1075 (dst).sem_nsems = (src).sem_nsems; \ 1076 (dst).sem_otime = (src).sem_otime; \ 1077 (dst).sem_ctime = (src).sem_ctime; \ 1078 } while (0) 1079 #define FILL_SHM(src, dst) do { \ 1080 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1081 (dst).shm_segsz = (src).shm_segsz; \ 1082 (dst).shm_lpid = (src).shm_lpid; \ 1083 (dst).shm_cpid = (src).shm_cpid; \ 1084 (dst).shm_atime = (src).shm_atime; \ 1085 (dst).shm_dtime = (src).shm_dtime; \ 1086 (dst).shm_ctime = (src).shm_ctime; \ 1087 (dst).shm_nattch = (src).shm_nattch; \ 1088 } while (0) 1089 1090 static int 1091 sysctl_sysvipc(name, namelen, where, sizep) 1092 int *name; 1093 u_int namelen; 1094 void *where; 1095 size_t *sizep; 1096 { 1097 #ifdef SYSVMSG 1098 struct msg_sysctl_info *msgsi; 1099 #endif 1100 #ifdef SYSVSEM 1101 struct sem_sysctl_info *semsi; 1102 #endif 1103 #ifdef SYSVSHM 1104 struct shm_sysctl_info *shmsi; 1105 #endif 1106 size_t infosize, dssize, tsize, buflen; 1107 void *buf = NULL, *buf2; 1108 char *start; 1109 int32_t nds; 1110 int i, error, ret; 1111 1112 if (namelen != 1) 1113 return (EINVAL); 1114 1115 start = where; 1116 buflen = *sizep; 1117 1118 switch (*name) { 1119 case KERN_SYSVIPC_MSG_INFO: 1120 #ifdef SYSVMSG 1121 infosize = sizeof(msgsi->msginfo); 1122 nds = msginfo.msgmni; 1123 dssize = sizeof(msgsi->msgids[0]); 1124 break; 1125 #else 1126 return (EINVAL); 1127 #endif 1128 case KERN_SYSVIPC_SEM_INFO: 1129 #ifdef SYSVSEM 1130 infosize = sizeof(semsi->seminfo); 1131 nds = seminfo.semmni; 1132 dssize = sizeof(semsi->semids[0]); 1133 break; 1134 #else 1135 return (EINVAL); 1136 #endif 1137 case KERN_SYSVIPC_SHM_INFO: 1138 #ifdef SYSVSHM 1139 infosize = sizeof(shmsi->shminfo); 1140 nds = shminfo.shmmni; 1141 dssize = sizeof(shmsi->shmids[0]); 1142 break; 1143 #else 1144 return (EINVAL); 1145 #endif 1146 default: 1147 return (EINVAL); 1148 } 1149 /* 1150 * Round infosize to 64 bit boundary if requesting more than just 1151 * the info structure or getting the total data size. 1152 */ 1153 if (where == NULL || *sizep > infosize) 1154 infosize = ((infosize + 7) / 8) * 8; 1155 tsize = infosize + nds * dssize; 1156 1157 /* Return just the total size required. */ 1158 if (where == NULL) { 1159 *sizep = tsize; 1160 return (0); 1161 } 1162 1163 /* Not enough room for even the info struct. */ 1164 if (buflen < infosize) { 1165 *sizep = 0; 1166 return (ENOMEM); 1167 } 1168 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1169 memset(buf, 0, min(tsize, buflen)); 1170 1171 switch (*name) { 1172 #ifdef SYSVMSG 1173 case KERN_SYSVIPC_MSG_INFO: 1174 msgsi = (struct msg_sysctl_info *)buf; 1175 buf2 = &msgsi->msgids[0]; 1176 msgsi->msginfo = msginfo; 1177 break; 1178 #endif 1179 #ifdef SYSVSEM 1180 case KERN_SYSVIPC_SEM_INFO: 1181 semsi = (struct sem_sysctl_info *)buf; 1182 buf2 = &semsi->semids[0]; 1183 semsi->seminfo = seminfo; 1184 break; 1185 #endif 1186 #ifdef SYSVSHM 1187 case KERN_SYSVIPC_SHM_INFO: 1188 shmsi = (struct shm_sysctl_info *)buf; 1189 buf2 = &shmsi->shmids[0]; 1190 shmsi->shminfo = shminfo; 1191 break; 1192 #endif 1193 } 1194 buflen -= infosize; 1195 1196 ret = 0; 1197 if (buflen > 0) { 1198 /* Fill in the IPC data structures. */ 1199 for (i = 0; i < nds; i++) { 1200 if (buflen < dssize) { 1201 ret = ENOMEM; 1202 break; 1203 } 1204 switch (*name) { 1205 #ifdef SYSVMSG 1206 case KERN_SYSVIPC_MSG_INFO: 1207 FILL_MSG(msqids[i], msgsi->msgids[i]); 1208 break; 1209 #endif 1210 #ifdef SYSVSEM 1211 case KERN_SYSVIPC_SEM_INFO: 1212 FILL_SEM(sema[i], semsi->semids[i]); 1213 break; 1214 #endif 1215 #ifdef SYSVSHM 1216 case KERN_SYSVIPC_SHM_INFO: 1217 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1218 break; 1219 #endif 1220 } 1221 buflen -= dssize; 1222 } 1223 } 1224 *sizep -= buflen; 1225 error = copyout(buf, start, *sizep); 1226 /* If copyout succeeded, use return code set earlier. */ 1227 if (error == 0) 1228 error = ret; 1229 if (buf) 1230 free(buf, M_TEMP); 1231 return (error); 1232 } 1233 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1234 1235 static int 1236 sysctl_msgbuf(vwhere, sizep) 1237 void *vwhere; 1238 size_t *sizep; 1239 { 1240 char *where = vwhere; 1241 size_t len, maxlen = *sizep; 1242 long pos; 1243 int error; 1244 1245 /* 1246 * deal with cases where the message buffer has 1247 * become corrupted. 1248 */ 1249 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1250 msgbufenabled = 0; 1251 return (ENXIO); 1252 } 1253 1254 if (where == NULL) { 1255 /* always return full buffer size */ 1256 *sizep = msgbufp->msg_bufs; 1257 return (0); 1258 } 1259 1260 error = 0; 1261 maxlen = min(msgbufp->msg_bufs, maxlen); 1262 pos = msgbufp->msg_bufx; 1263 while (maxlen > 0) { 1264 len = pos == 0 ? msgbufp->msg_bufx : msgbufp->msg_bufs - msgbufp->msg_bufx; 1265 len = min(len, maxlen); 1266 if (len == 0) 1267 break; 1268 error = copyout(&msgbufp->msg_bufc[pos], where, len); 1269 if (error) 1270 break; 1271 where += len; 1272 maxlen -= len; 1273 pos = 0; 1274 } 1275 return (error); 1276 } 1277 1278 /* 1279 * try over estimating by 5 procs 1280 */ 1281 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1282 1283 static int 1284 sysctl_doeproc(name, namelen, vwhere, sizep) 1285 int *name; 1286 u_int namelen; 1287 void *vwhere; 1288 size_t *sizep; 1289 { 1290 struct eproc eproc; 1291 struct kinfo_proc2 kproc2; 1292 struct kinfo_proc *dp; 1293 struct proc *p; 1294 const struct proclist_desc *pd; 1295 char *where, *dp2; 1296 int type, op, arg, elem_size, elem_count; 1297 int buflen, needed, error; 1298 1299 dp = vwhere; 1300 dp2 = where = vwhere; 1301 buflen = where != NULL ? *sizep : 0; 1302 error = needed = 0; 1303 type = name[0]; 1304 1305 if (type == KERN_PROC) { 1306 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1307 return (EINVAL); 1308 op = name[1]; 1309 if (op != KERN_PROC_ALL) 1310 arg = name[2]; 1311 } else { 1312 if (namelen != 5) 1313 return (EINVAL); 1314 op = name[1]; 1315 arg = name[2]; 1316 elem_size = name[3]; 1317 elem_count = name[4]; 1318 } 1319 1320 proclist_lock_read(); 1321 1322 pd = proclists; 1323 again: 1324 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1325 /* 1326 * Skip embryonic processes. 1327 */ 1328 if (p->p_stat == SIDL) 1329 continue; 1330 /* 1331 * TODO - make more efficient (see notes below). 1332 * do by session. 1333 */ 1334 switch (op) { 1335 1336 case KERN_PROC_PID: 1337 /* could do this with just a lookup */ 1338 if (p->p_pid != (pid_t)arg) 1339 continue; 1340 break; 1341 1342 case KERN_PROC_PGRP: 1343 /* could do this by traversing pgrp */ 1344 if (p->p_pgrp->pg_id != (pid_t)arg) 1345 continue; 1346 break; 1347 1348 case KERN_PROC_SESSION: 1349 if (p->p_session->s_sid != (pid_t)arg) 1350 continue; 1351 break; 1352 1353 case KERN_PROC_TTY: 1354 if (arg == KERN_PROC_TTY_REVOKE) { 1355 if ((p->p_flag & P_CONTROLT) == 0 || 1356 p->p_session->s_ttyp == NULL || 1357 p->p_session->s_ttyvp != NULL) 1358 continue; 1359 } else if ((p->p_flag & P_CONTROLT) == 0 || 1360 p->p_session->s_ttyp == NULL) { 1361 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1362 continue; 1363 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1364 continue; 1365 break; 1366 1367 case KERN_PROC_UID: 1368 if (p->p_ucred->cr_uid != (uid_t)arg) 1369 continue; 1370 break; 1371 1372 case KERN_PROC_RUID: 1373 if (p->p_cred->p_ruid != (uid_t)arg) 1374 continue; 1375 break; 1376 1377 case KERN_PROC_GID: 1378 if (p->p_ucred->cr_gid != (uid_t)arg) 1379 continue; 1380 break; 1381 1382 case KERN_PROC_RGID: 1383 if (p->p_cred->p_rgid != (uid_t)arg) 1384 continue; 1385 break; 1386 1387 case KERN_PROC_ALL: 1388 /* allow everything */ 1389 break; 1390 1391 default: 1392 error = EINVAL; 1393 goto cleanup; 1394 } 1395 if (type == KERN_PROC) { 1396 if (buflen >= sizeof(struct kinfo_proc)) { 1397 fill_eproc(p, &eproc); 1398 error = copyout((caddr_t)p, &dp->kp_proc, 1399 sizeof(struct proc)); 1400 if (error) 1401 goto cleanup; 1402 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1403 sizeof(eproc)); 1404 if (error) 1405 goto cleanup; 1406 dp++; 1407 buflen -= sizeof(struct kinfo_proc); 1408 } 1409 needed += sizeof(struct kinfo_proc); 1410 } else { /* KERN_PROC2 */ 1411 if (buflen >= elem_size && elem_count > 0) { 1412 fill_kproc2(p, &kproc2); 1413 /* 1414 * Copy out elem_size, but not larger than 1415 * the size of a struct kinfo_proc2. 1416 */ 1417 error = copyout(&kproc2, dp2, 1418 min(sizeof(kproc2), elem_size)); 1419 if (error) 1420 goto cleanup; 1421 dp2 += elem_size; 1422 buflen -= elem_size; 1423 elem_count--; 1424 } 1425 needed += elem_size; 1426 } 1427 } 1428 pd++; 1429 if (pd->pd_list != NULL) 1430 goto again; 1431 proclist_unlock_read(); 1432 1433 if (where != NULL) { 1434 if (type == KERN_PROC) 1435 *sizep = (caddr_t)dp - where; 1436 else 1437 *sizep = dp2 - where; 1438 if (needed > *sizep) 1439 return (ENOMEM); 1440 } else { 1441 needed += KERN_PROCSLOP; 1442 *sizep = needed; 1443 } 1444 return (0); 1445 cleanup: 1446 proclist_unlock_read(); 1447 return (error); 1448 } 1449 1450 /* 1451 * Fill in an eproc structure for the specified process. 1452 */ 1453 void 1454 fill_eproc(p, ep) 1455 struct proc *p; 1456 struct eproc *ep; 1457 { 1458 struct tty *tp; 1459 1460 ep->e_paddr = p; 1461 ep->e_sess = p->p_session; 1462 ep->e_pcred = *p->p_cred; 1463 ep->e_ucred = *p->p_ucred; 1464 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1465 ep->e_vm.vm_rssize = 0; 1466 ep->e_vm.vm_tsize = 0; 1467 ep->e_vm.vm_dsize = 0; 1468 ep->e_vm.vm_ssize = 0; 1469 /* ep->e_vm.vm_pmap = XXX; */ 1470 } else { 1471 struct vmspace *vm = p->p_vmspace; 1472 1473 ep->e_vm.vm_rssize = vm_resident_count(vm); 1474 ep->e_vm.vm_tsize = vm->vm_tsize; 1475 ep->e_vm.vm_dsize = vm->vm_dsize; 1476 ep->e_vm.vm_ssize = vm->vm_ssize; 1477 } 1478 if (p->p_pptr) 1479 ep->e_ppid = p->p_pptr->p_pid; 1480 else 1481 ep->e_ppid = 0; 1482 ep->e_pgid = p->p_pgrp->pg_id; 1483 ep->e_sid = ep->e_sess->s_sid; 1484 ep->e_jobc = p->p_pgrp->pg_jobc; 1485 if ((p->p_flag & P_CONTROLT) && 1486 (tp = ep->e_sess->s_ttyp)) { 1487 ep->e_tdev = tp->t_dev; 1488 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1489 ep->e_tsess = tp->t_session; 1490 } else 1491 ep->e_tdev = NODEV; 1492 if (p->p_wmesg) 1493 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1494 ep->e_xsize = ep->e_xrssize = 0; 1495 ep->e_xccount = ep->e_xswrss = 0; 1496 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1497 if (SESS_LEADER(p)) 1498 ep->e_flag |= EPROC_SLEADER; 1499 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1500 } 1501 1502 /* 1503 * Fill in an eproc structure for the specified process. 1504 */ 1505 static void 1506 fill_kproc2(p, ki) 1507 struct proc *p; 1508 struct kinfo_proc2 *ki; 1509 { 1510 struct tty *tp; 1511 1512 memset(ki, 0, sizeof(*ki)); 1513 1514 ki->p_forw = PTRTOINT64(p->p_forw); 1515 ki->p_back = PTRTOINT64(p->p_back); 1516 ki->p_paddr = PTRTOINT64(p); 1517 1518 ki->p_addr = PTRTOINT64(p->p_addr); 1519 ki->p_fd = PTRTOINT64(p->p_fd); 1520 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1521 ki->p_stats = PTRTOINT64(p->p_stats); 1522 ki->p_limit = PTRTOINT64(p->p_limit); 1523 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1524 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1525 ki->p_sess = PTRTOINT64(p->p_session); 1526 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1527 ki->p_ru = PTRTOINT64(p->p_ru); 1528 1529 ki->p_eflag = 0; 1530 ki->p_exitsig = p->p_exitsig; 1531 ki->p_flag = p->p_flag; 1532 1533 ki->p_pid = p->p_pid; 1534 if (p->p_pptr) 1535 ki->p_ppid = p->p_pptr->p_pid; 1536 else 1537 ki->p_ppid = 0; 1538 ki->p_sid = p->p_session->s_sid; 1539 ki->p__pgid = p->p_pgrp->pg_id; 1540 1541 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1542 1543 ki->p_uid = p->p_ucred->cr_uid; 1544 ki->p_ruid = p->p_cred->p_ruid; 1545 ki->p_gid = p->p_ucred->cr_gid; 1546 ki->p_rgid = p->p_cred->p_rgid; 1547 1548 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1549 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1550 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1551 1552 ki->p_jobc = p->p_pgrp->pg_jobc; 1553 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1554 ki->p_tdev = tp->t_dev; 1555 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1556 ki->p_tsess = PTRTOINT64(tp->t_session); 1557 } else { 1558 ki->p_tdev = NODEV; 1559 } 1560 1561 ki->p_estcpu = p->p_estcpu; 1562 ki->p_rtime_sec = p->p_rtime.tv_sec; 1563 ki->p_rtime_usec = p->p_rtime.tv_usec; 1564 ki->p_cpticks = p->p_cpticks; 1565 ki->p_pctcpu = p->p_pctcpu; 1566 ki->p_swtime = p->p_swtime; 1567 ki->p_slptime = p->p_slptime; 1568 if (p->p_stat == SONPROC) { 1569 KDASSERT(p->p_cpu != NULL); 1570 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1571 } else 1572 ki->p_schedflags = 0; 1573 1574 ki->p_uticks = p->p_uticks; 1575 ki->p_sticks = p->p_sticks; 1576 ki->p_iticks = p->p_iticks; 1577 1578 ki->p_tracep = PTRTOINT64(p->p_tracep); 1579 ki->p_traceflag = p->p_traceflag; 1580 1581 ki->p_holdcnt = p->p_holdcnt; 1582 1583 memcpy(&ki->p_siglist, &p->p_siglist, sizeof(ki_sigset_t)); 1584 memcpy(&ki->p_sigmask, &p->p_sigmask, sizeof(ki_sigset_t)); 1585 memcpy(&ki->p_sigignore, &p->p_sigignore, sizeof(ki_sigset_t)); 1586 memcpy(&ki->p_sigcatch, &p->p_sigcatch, sizeof(ki_sigset_t)); 1587 1588 ki->p_stat = p->p_stat; 1589 ki->p_priority = p->p_priority; 1590 ki->p_usrpri = p->p_usrpri; 1591 ki->p_nice = p->p_nice; 1592 1593 ki->p_xstat = p->p_xstat; 1594 ki->p_acflag = p->p_acflag; 1595 1596 strncpy(ki->p_comm, p->p_comm, 1597 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1598 1599 if (p->p_wmesg) 1600 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1601 ki->p_wchan = PTRTOINT64(p->p_wchan); 1602 1603 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1604 1605 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1606 ki->p_vm_rssize = 0; 1607 ki->p_vm_tsize = 0; 1608 ki->p_vm_dsize = 0; 1609 ki->p_vm_ssize = 0; 1610 } else { 1611 struct vmspace *vm = p->p_vmspace; 1612 1613 ki->p_vm_rssize = vm_resident_count(vm); 1614 ki->p_vm_tsize = vm->vm_tsize; 1615 ki->p_vm_dsize = vm->vm_dsize; 1616 ki->p_vm_ssize = vm->vm_ssize; 1617 } 1618 1619 if (p->p_session->s_ttyvp) 1620 ki->p_eflag |= EPROC_CTTY; 1621 if (SESS_LEADER(p)) 1622 ki->p_eflag |= EPROC_SLEADER; 1623 1624 /* XXX Is this double check necessary? */ 1625 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1626 ki->p_uvalid = 0; 1627 } else { 1628 ki->p_uvalid = 1; 1629 1630 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1631 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1632 1633 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1634 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1635 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1636 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1637 1638 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1639 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1640 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1641 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1642 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1643 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1644 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1645 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1646 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1647 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1648 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1649 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1650 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1651 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1652 1653 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1654 p->p_stats->p_cru.ru_stime.tv_sec; 1655 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1656 p->p_stats->p_cru.ru_stime.tv_usec; 1657 } 1658 #ifdef MULTIPROCESSOR 1659 if (p->p_cpu != NULL) 1660 ki->p_cpuid = p->p_cpu->ci_cpuid; 1661 else 1662 #endif 1663 ki->p_cpuid = KI_NOCPU; 1664 } 1665 1666 int 1667 sysctl_procargs(name, namelen, where, sizep, up) 1668 int *name; 1669 u_int namelen; 1670 void *where; 1671 size_t *sizep; 1672 struct proc *up; 1673 { 1674 struct ps_strings pss; 1675 struct proc *p; 1676 size_t len, upper_bound, xlen; 1677 struct uio auio; 1678 struct iovec aiov; 1679 vaddr_t argv; 1680 pid_t pid; 1681 int nargv, type, error, i; 1682 char *arg; 1683 char *tmp; 1684 1685 if (namelen != 2) 1686 return (EINVAL); 1687 pid = name[0]; 1688 type = name[1]; 1689 1690 switch (type) { 1691 case KERN_PROC_ARGV: 1692 case KERN_PROC_NARGV: 1693 case KERN_PROC_ENV: 1694 case KERN_PROC_NENV: 1695 /* ok */ 1696 break; 1697 default: 1698 return (EINVAL); 1699 } 1700 1701 /* check pid */ 1702 if ((p = pfind(pid)) == NULL) 1703 return (EINVAL); 1704 1705 /* only root or same user change look at the environment */ 1706 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1707 if (up->p_ucred->cr_uid != 0) { 1708 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1709 up->p_cred->p_ruid != p->p_cred->p_svuid) 1710 return (EPERM); 1711 } 1712 } 1713 1714 if (sizep != NULL && where == NULL) { 1715 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1716 *sizep = sizeof (int); 1717 else 1718 *sizep = ARG_MAX; /* XXX XXX XXX */ 1719 return (0); 1720 } 1721 if (where == NULL || sizep == NULL) 1722 return (EINVAL); 1723 1724 /* 1725 * Zombies don't have a stack, so we can't read their psstrings. 1726 * System processes also don't have a user stack. 1727 */ 1728 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1729 return (EINVAL); 1730 1731 /* 1732 * Lock the process down in memory. 1733 */ 1734 /* XXXCDC: how should locking work here? */ 1735 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1736 return (EFAULT); 1737 p->p_vmspace->vm_refcnt++; /* XXX */ 1738 1739 /* 1740 * Allocate a temporary buffer to hold the arguments. 1741 */ 1742 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1743 1744 /* 1745 * Read in the ps_strings structure. 1746 */ 1747 aiov.iov_base = &pss; 1748 aiov.iov_len = sizeof(pss); 1749 auio.uio_iov = &aiov; 1750 auio.uio_iovcnt = 1; 1751 auio.uio_offset = (vaddr_t)p->p_psstr; 1752 auio.uio_resid = sizeof(pss); 1753 auio.uio_segflg = UIO_SYSSPACE; 1754 auio.uio_rw = UIO_READ; 1755 auio.uio_procp = NULL; 1756 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1757 if (error) 1758 goto done; 1759 1760 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1761 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1762 else 1763 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1764 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1765 error = copyout(&nargv, where, sizeof(nargv)); 1766 *sizep = sizeof(nargv); 1767 goto done; 1768 } 1769 /* 1770 * Now read the address of the argument vector. 1771 */ 1772 switch (type) { 1773 case KERN_PROC_ARGV: 1774 /* XXX compat32 stuff here */ 1775 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1776 break; 1777 case KERN_PROC_ENV: 1778 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1779 break; 1780 default: 1781 return (EINVAL); 1782 } 1783 auio.uio_offset = (off_t)(long)tmp; 1784 aiov.iov_base = &argv; 1785 aiov.iov_len = sizeof(argv); 1786 auio.uio_iov = &aiov; 1787 auio.uio_iovcnt = 1; 1788 auio.uio_resid = sizeof(argv); 1789 auio.uio_segflg = UIO_SYSSPACE; 1790 auio.uio_rw = UIO_READ; 1791 auio.uio_procp = NULL; 1792 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1793 if (error) 1794 goto done; 1795 1796 /* 1797 * Now copy in the actual argument vector, one page at a time, 1798 * since we don't know how long the vector is (though, we do 1799 * know how many NUL-terminated strings are in the vector). 1800 */ 1801 len = 0; 1802 upper_bound = *sizep; 1803 for (; nargv != 0 && len < upper_bound; len += xlen) { 1804 aiov.iov_base = arg; 1805 aiov.iov_len = PAGE_SIZE; 1806 auio.uio_iov = &aiov; 1807 auio.uio_iovcnt = 1; 1808 auio.uio_offset = argv + len; 1809 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1810 auio.uio_resid = xlen; 1811 auio.uio_segflg = UIO_SYSSPACE; 1812 auio.uio_rw = UIO_READ; 1813 auio.uio_procp = NULL; 1814 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1815 if (error) 1816 goto done; 1817 1818 for (i = 0; i < xlen && nargv != 0; i++) { 1819 if (arg[i] == '\0') 1820 nargv--; /* one full string */ 1821 } 1822 1823 /* make sure we don't copyout past the end of the user's buffer */ 1824 if (len + i > upper_bound) 1825 i = upper_bound - len; 1826 1827 error = copyout(arg, (char *)where + len, i); 1828 if (error) 1829 break; 1830 1831 if (nargv == 0) { 1832 len += i; 1833 break; 1834 } 1835 } 1836 *sizep = len; 1837 1838 done: 1839 uvmspace_free(p->p_vmspace); 1840 1841 free(arg, M_TEMP); 1842 return (error); 1843 } 1844 1845 #if NPTY > 0 1846 int pty_maxptys __P((int, int)); /* defined in kern/tty_pty.c */ 1847 1848 /* 1849 * Validate parameters and get old / set new parameters 1850 * for pty sysctl function. 1851 */ 1852 static int 1853 sysctl_pty(oldp, oldlenp, newp, newlen) 1854 void *oldp; 1855 size_t *oldlenp; 1856 void *newp; 1857 size_t newlen; 1858 { 1859 int error = 0; 1860 int oldmax = 0, newmax = 0; 1861 1862 /* get current value of maxptys */ 1863 oldmax = pty_maxptys(0, 0); 1864 1865 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1866 1867 if (!error && newp) { 1868 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1869 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1870 1871 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1872 return (EINVAL); 1873 1874 } 1875 1876 return (error); 1877 } 1878 #endif /* NPTY > 0 */ 1879
Indexes created Wed Sep 24 15:09:51 GMT 2025