kern_sysctl.c revision 1.86.2.11
1 /* $NetBSD: kern_sysctl.c,v 1.86.2.11 2001/11/29 01:22:57 nathanw 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 1.86.2.11 2001/11/29 01:22:57 nathanw Exp $"); 47 48 #include "opt_ddb.h" 49 #include "opt_insecure.h" 50 #include "opt_defcorename.h" 51 #include "opt_new_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/lwp.h> 70 #include <sys/proc.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 #ifdef NEW_PIPE 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 #ifdef MULTIPROCESSOR 115 static int sysctl_docptime(void *, size_t *, void *); 116 static int sysctl_ncpus(void); 117 #endif 118 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 119 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 120 #if NPTY > 0 121 static int sysctl_pty(void *, size_t *, void *, size_t); 122 #endif 123 124 /* 125 * The `sysctl_memlock' is intended to keep too many processes from 126 * locking down memory by doing sysctls at once. Whether or not this 127 * is really a good idea to worry about it probably a subject of some 128 * debate. 129 */ 130 struct lock sysctl_memlock; 131 132 void 133 sysctl_init(void) 134 { 135 136 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 137 } 138 139 int 140 sys___sysctl(struct lwp *l, void *v, register_t *retval) 141 { 142 struct sys___sysctl_args /* { 143 syscallarg(int *) name; 144 syscallarg(u_int) namelen; 145 syscallarg(void *) old; 146 syscallarg(size_t *) oldlenp; 147 syscallarg(void *) new; 148 syscallarg(size_t) newlen; 149 } */ *uap = v; 150 struct proc *p = l->l_proc; 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 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 224 if (error) 225 return (error); 226 error = uvm_vslock(p, SCARG(uap, old), oldlen, 227 VM_PROT_READ|VM_PROT_WRITE); 228 if (error) { 229 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 230 return error; 231 } 232 savelen = oldlen; 233 } 234 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 235 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 236 if (SCARG(uap, old) != NULL) { 237 uvm_vsunlock(p, SCARG(uap, old), savelen); 238 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 239 } 240 if (error) 241 return (error); 242 if (SCARG(uap, oldlenp)) 243 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 244 return (error); 245 } 246 247 /* 248 * Attributes stored in the kernel. 249 */ 250 char hostname[MAXHOSTNAMELEN]; 251 int hostnamelen; 252 253 char domainname[MAXHOSTNAMELEN]; 254 int domainnamelen; 255 256 long hostid; 257 258 #ifdef INSECURE 259 int securelevel = -1; 260 #else 261 int securelevel = 0; 262 #endif 263 264 #ifndef DEFCORENAME 265 #define DEFCORENAME "%n.core" 266 #endif 267 char defcorename[MAXPATHLEN] = DEFCORENAME; 268 int defcorenamelen = sizeof(DEFCORENAME); 269 270 extern int kern_logsigexit; 271 extern fixpt_t ccpu; 272 273 #ifndef MULTIPROCESSOR 274 #define sysctl_ncpus() 1 275 #endif 276 277 #ifdef MULTIPROCESSOR 278 279 #ifndef CPU_INFO_FOREACH 280 #define CPU_INFO_ITERATOR int 281 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 282 #endif 283 284 static int 285 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 286 { 287 u_int64_t cp_time[CPUSTATES]; 288 int i; 289 struct cpu_info *ci; 290 CPU_INFO_ITERATOR cii; 291 292 for (i=0; i<CPUSTATES; i++) 293 cp_time[i] = 0; 294 295 for (CPU_INFO_FOREACH(cii, ci)) { 296 for (i=0; i<CPUSTATES; i++) 297 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 298 } 299 return (sysctl_rdstruct(oldp, oldlenp, newp, 300 cp_time, sizeof(cp_time))); 301 } 302 303 static int 304 sysctl_ncpus(void) 305 { 306 struct cpu_info *ci; 307 CPU_INFO_ITERATOR cii; 308 309 int ncpus = 0; 310 for (CPU_INFO_FOREACH(cii, ci)) 311 ncpus++; 312 return ncpus; 313 } 314 315 #endif 316 317 /* 318 * kernel related system variables. 319 */ 320 int 321 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 322 void *newp, size_t newlen, struct proc *p) 323 { 324 int error, level, inthostid; 325 int old_autonicetime; 326 int old_vnodes; 327 dev_t consdev; 328 329 /* All sysctl names at this level, except for a few, are terminal. */ 330 switch (name[0]) { 331 case KERN_PROC: 332 case KERN_PROC2: 333 case KERN_PROF: 334 case KERN_MBUF: 335 case KERN_PROC_ARGS: 336 case KERN_SYSVIPC_INFO: 337 case KERN_PIPE: 338 /* Not terminal. */ 339 break; 340 default: 341 if (namelen != 1) 342 return (ENOTDIR); /* overloaded */ 343 } 344 345 switch (name[0]) { 346 case KERN_OSTYPE: 347 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 348 case KERN_OSRELEASE: 349 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 350 case KERN_OSREV: 351 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 352 case KERN_VERSION: 353 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 354 case KERN_MAXVNODES: 355 old_vnodes = desiredvnodes; 356 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 357 if (old_vnodes > desiredvnodes) { 358 desiredvnodes = old_vnodes; 359 return (EINVAL); 360 } 361 if (error == 0) { 362 vfs_reinit(); 363 nchreinit(); 364 } 365 return (error); 366 case KERN_MAXPROC: 367 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 368 case KERN_MAXFILES: 369 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 370 case KERN_ARGMAX: 371 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 372 case KERN_SECURELVL: 373 level = securelevel; 374 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 375 newp == NULL) 376 return (error); 377 if (level < securelevel && p->p_pid != 1) 378 return (EPERM); 379 securelevel = level; 380 return (0); 381 case KERN_HOSTNAME: 382 error = sysctl_string(oldp, oldlenp, newp, newlen, 383 hostname, sizeof(hostname)); 384 if (newp && !error) 385 hostnamelen = newlen; 386 return (error); 387 case KERN_DOMAINNAME: 388 error = sysctl_string(oldp, oldlenp, newp, newlen, 389 domainname, sizeof(domainname)); 390 if (newp && !error) 391 domainnamelen = newlen; 392 return (error); 393 case KERN_HOSTID: 394 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 395 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 396 hostid = inthostid; 397 return (error); 398 case KERN_CLOCKRATE: 399 return (sysctl_clockrate(oldp, oldlenp)); 400 case KERN_BOOTTIME: 401 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 402 sizeof(struct timeval))); 403 case KERN_VNODE: 404 return (sysctl_vnode(oldp, oldlenp, p)); 405 case KERN_PROC: 406 case KERN_PROC2: 407 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 408 case KERN_PROC_ARGS: 409 return (sysctl_procargs(name + 1, namelen - 1, 410 oldp, oldlenp, p)); 411 case KERN_FILE: 412 return (sysctl_file(oldp, oldlenp)); 413 #ifdef GPROF 414 case KERN_PROF: 415 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 416 newp, newlen)); 417 #endif 418 case KERN_POSIX1: 419 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 420 case KERN_NGROUPS: 421 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 422 case KERN_JOB_CONTROL: 423 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 424 case KERN_SAVED_IDS: 425 #ifdef _POSIX_SAVED_IDS 426 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 427 #else 428 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 429 #endif 430 case KERN_MAXPARTITIONS: 431 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 432 case KERN_RAWPARTITION: 433 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 434 #ifdef NTP 435 case KERN_NTPTIME: 436 return (sysctl_ntptime(oldp, oldlenp)); 437 #endif 438 case KERN_AUTONICETIME: 439 old_autonicetime = autonicetime; 440 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 441 if (autonicetime < 0) 442 autonicetime = old_autonicetime; 443 return (error); 444 case KERN_AUTONICEVAL: 445 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 446 if (autoniceval < PRIO_MIN) 447 autoniceval = PRIO_MIN; 448 if (autoniceval > PRIO_MAX) 449 autoniceval = PRIO_MAX; 450 return (error); 451 case KERN_RTC_OFFSET: 452 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 453 case KERN_ROOT_DEVICE: 454 return (sysctl_rdstring(oldp, oldlenp, newp, 455 root_device->dv_xname)); 456 case KERN_MSGBUFSIZE: 457 /* 458 * deal with cases where the message buffer has 459 * become corrupted. 460 */ 461 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 462 msgbufenabled = 0; 463 return (ENXIO); 464 } 465 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 466 case KERN_FSYNC: 467 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 468 case KERN_SYSVMSG: 469 #ifdef SYSVMSG 470 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 471 #else 472 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 473 #endif 474 case KERN_SYSVSEM: 475 #ifdef SYSVSEM 476 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 477 #else 478 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 479 #endif 480 case KERN_SYSVSHM: 481 #ifdef SYSVSHM 482 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 483 #else 484 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 485 #endif 486 case KERN_DEFCORENAME: 487 if (newp && newlen < 1) 488 return (EINVAL); 489 error = sysctl_string(oldp, oldlenp, newp, newlen, 490 defcorename, sizeof(defcorename)); 491 if (newp && !error) 492 defcorenamelen = newlen; 493 return (error); 494 case KERN_SYNCHRONIZED_IO: 495 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 496 case KERN_IOV_MAX: 497 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 498 case KERN_MBUF: 499 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 500 newp, newlen)); 501 case KERN_MAPPED_FILES: 502 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 503 case KERN_MEMLOCK: 504 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 505 case KERN_MEMLOCK_RANGE: 506 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 507 case KERN_MEMORY_PROTECTION: 508 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 509 case KERN_LOGIN_NAME_MAX: 510 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 511 case KERN_LOGSIGEXIT: 512 return (sysctl_int(oldp, oldlenp, newp, newlen, 513 &kern_logsigexit)); 514 case KERN_FSCALE: 515 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 516 case KERN_CCPU: 517 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 518 case KERN_CP_TIME: 519 #ifndef MULTIPROCESSOR 520 return (sysctl_rdstruct(oldp, oldlenp, newp, 521 curcpu()->ci_schedstate.spc_cp_time, 522 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 523 #else 524 return (sysctl_docptime(oldp, oldlenp, newp)); 525 #endif 526 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 527 case KERN_SYSVIPC_INFO: 528 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 529 #endif 530 case KERN_MSGBUF: 531 return (sysctl_msgbuf(oldp, oldlenp)); 532 case KERN_CONSDEV: 533 if (cn_tab != NULL) 534 consdev = cn_tab->cn_dev; 535 else 536 consdev = NODEV; 537 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 538 sizeof consdev)); 539 #if NPTY > 0 540 case KERN_MAXPTYS: 541 return sysctl_pty(oldp, oldlenp, newp, newlen); 542 #endif 543 #ifdef NEW_PIPE 544 case KERN_PIPE: 545 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 546 newp, newlen)); 547 #endif 548 case KERN_MAXPHYS: 549 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 550 case KERN_SBMAX: 551 { 552 int new_sbmax = sb_max; 553 554 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 555 if (error == 0) { 556 if (new_sbmax < (16 * 1024)) /* sanity */ 557 return (EINVAL); 558 sb_max = new_sbmax; 559 } 560 return (error); 561 } 562 default: 563 return (EOPNOTSUPP); 564 } 565 /* NOTREACHED */ 566 } 567 568 /* 569 * hardware related system variables. 570 */ 571 int 572 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 573 void *newp, size_t newlen, struct proc *p) 574 { 575 576 /* all sysctl names at this level are terminal */ 577 if (namelen != 1) 578 return (ENOTDIR); /* overloaded */ 579 580 switch (name[0]) { 581 case HW_MACHINE: 582 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 583 case HW_MACHINE_ARCH: 584 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 585 case HW_MODEL: 586 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 587 case HW_NCPU: 588 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 589 case HW_BYTEORDER: 590 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 591 case HW_PHYSMEM: 592 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 593 case HW_USERMEM: 594 return (sysctl_rdint(oldp, oldlenp, newp, 595 ctob(physmem - uvmexp.wired))); 596 case HW_PAGESIZE: 597 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 598 case HW_ALIGNBYTES: 599 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 600 case HW_CNMAGIC: { 601 char magic[CNS_LEN]; 602 int error; 603 604 if (oldp) 605 cn_get_magic(magic, CNS_LEN); 606 error = sysctl_string(oldp, oldlenp, newp, newlen, 607 magic, sizeof(magic)); 608 if (newp && !error) { 609 error = cn_set_magic(magic); 610 } 611 return (error); 612 } 613 default: 614 return (EOPNOTSUPP); 615 } 616 /* NOTREACHED */ 617 } 618 619 #ifdef DEBUG 620 /* 621 * Debugging related system variables. 622 */ 623 struct ctldebug debug0, debug1, debug2, debug3, debug4; 624 struct ctldebug debug5, debug6, debug7, debug8, debug9; 625 struct ctldebug debug10, debug11, debug12, debug13, debug14; 626 struct ctldebug debug15, debug16, debug17, debug18, debug19; 627 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 628 &debug0, &debug1, &debug2, &debug3, &debug4, 629 &debug5, &debug6, &debug7, &debug8, &debug9, 630 &debug10, &debug11, &debug12, &debug13, &debug14, 631 &debug15, &debug16, &debug17, &debug18, &debug19, 632 }; 633 634 int 635 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 636 void *newp, size_t newlen, struct proc *p) 637 { 638 struct ctldebug *cdp; 639 640 /* all sysctl names at this level are name and field */ 641 if (namelen != 2) 642 return (ENOTDIR); /* overloaded */ 643 cdp = debugvars[name[0]]; 644 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 645 return (EOPNOTSUPP); 646 switch (name[1]) { 647 case CTL_DEBUG_NAME: 648 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 649 case CTL_DEBUG_VALUE: 650 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 651 default: 652 return (EOPNOTSUPP); 653 } 654 /* NOTREACHED */ 655 } 656 #endif /* DEBUG */ 657 658 int 659 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 660 void *newp, size_t newlen, struct proc *p) 661 { 662 struct proc *ptmp = NULL; 663 const struct proclist_desc *pd; 664 int error = 0; 665 struct rlimit alim; 666 struct plimit *newplim; 667 char *tmps = NULL; 668 int i, curlen, len; 669 670 if (namelen < 2) 671 return EINVAL; 672 673 if (name[0] == PROC_CURPROC) { 674 ptmp = p; 675 } else { 676 proclist_lock_read(); 677 for (pd = proclists; pd->pd_list != NULL; pd++) { 678 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 679 ptmp = LIST_NEXT(ptmp, p_list)) { 680 /* Skip embryonic processes. */ 681 if (ptmp->p_stat == SIDL) 682 continue; 683 if (ptmp->p_pid == (pid_t)name[0]) 684 break; 685 } 686 if (ptmp != NULL) 687 break; 688 } 689 proclist_unlock_read(); 690 if (ptmp == NULL) 691 return(ESRCH); 692 if (p->p_ucred->cr_uid != 0) { 693 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 694 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 695 return EPERM; 696 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 697 return EPERM; /* sgid proc */ 698 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 699 if (p->p_ucred->cr_groups[i] == 700 ptmp->p_cred->p_rgid) 701 break; 702 } 703 if (i == p->p_ucred->cr_ngroups) 704 return EPERM; 705 } 706 } 707 if (name[1] == PROC_PID_CORENAME) { 708 if (namelen != 2) 709 return EINVAL; 710 /* 711 * Can't use sysctl_string() here because we may malloc a new 712 * area during the process, so we have to do it by hand. 713 */ 714 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 715 if (oldlenp && *oldlenp < curlen) { 716 if (!oldp) 717 *oldlenp = curlen; 718 return (ENOMEM); 719 } 720 if (newp) { 721 if (securelevel > 2) 722 return EPERM; 723 if (newlen > MAXPATHLEN) 724 return ENAMETOOLONG; 725 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 726 if (tmps == NULL) 727 return ENOMEM; 728 error = copyin(newp, tmps, newlen + 1); 729 tmps[newlen] = '\0'; 730 if (error) 731 goto cleanup; 732 /* Enforce to be either 'core' for end with '.core' */ 733 if (newlen < 4) { /* c.o.r.e */ 734 error = EINVAL; 735 goto cleanup; 736 } 737 len = newlen - 4; 738 if (len > 0) { 739 if (tmps[len - 1] != '.' && 740 tmps[len - 1] != '/') { 741 error = EINVAL; 742 goto cleanup; 743 } 744 } 745 if (strcmp(&tmps[len], "core") != 0) { 746 error = EINVAL; 747 goto cleanup; 748 } 749 } 750 if (oldp && oldlenp) { 751 *oldlenp = curlen; 752 error = copyout(ptmp->p_limit->pl_corename, oldp, 753 curlen); 754 } 755 if (newp && error == 0) { 756 /* if the 2 strings are identical, don't limcopy() */ 757 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 758 error = 0; 759 goto cleanup; 760 } 761 if (ptmp->p_limit->p_refcnt > 1 && 762 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 763 newplim = limcopy(ptmp->p_limit); 764 limfree(ptmp->p_limit); 765 ptmp->p_limit = newplim; 766 } 767 if (ptmp->p_limit->pl_corename != defcorename) { 768 free(ptmp->p_limit->pl_corename, M_TEMP); 769 } 770 ptmp->p_limit->pl_corename = tmps; 771 return (0); 772 } 773 cleanup: 774 if (tmps) 775 free(tmps, M_TEMP); 776 return (error); 777 } 778 if (name[1] == PROC_PID_LIMIT) { 779 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 780 return EINVAL; 781 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 782 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 783 error = sysctl_quad(oldp, oldlenp, newp, newlen, 784 &alim.rlim_max); 785 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 786 error = sysctl_quad(oldp, oldlenp, newp, newlen, 787 &alim.rlim_cur); 788 else 789 error = EINVAL; 790 791 if (error) 792 return error; 793 794 if (newp) 795 error = dosetrlimit(ptmp, p->p_cred, 796 name[2] - 1, &alim); 797 return error; 798 } 799 return (EINVAL); 800 } 801 802 /* 803 * Convenience macros. 804 */ 805 806 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 807 if (oldlenp) { \ 808 if (!oldp) \ 809 *oldlenp = len; \ 810 else { \ 811 if (*oldlenp < len) \ 812 return(ENOMEM); \ 813 *oldlenp = len; \ 814 error = copyout((caddr_t)valp, oldp, len); \ 815 } \ 816 } 817 818 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 819 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 820 821 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 822 if (newp && newlen != len) \ 823 return (EINVAL); 824 825 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 826 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 827 828 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 829 if (error == 0 && newp) \ 830 error = copyin(newp, valp, len); 831 832 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 833 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 834 835 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 836 if (oldlenp) { \ 837 len = strlen(str) + 1; \ 838 if (!oldp) \ 839 *oldlenp = len; \ 840 else { \ 841 if (*oldlenp < len) { \ 842 err2 = ENOMEM; \ 843 len = *oldlenp; \ 844 } else \ 845 *oldlenp = len; \ 846 error = copyout(str, oldp, len);\ 847 if (error == 0) \ 848 error = err2; \ 849 } \ 850 } 851 852 /* 853 * Validate parameters and get old / set new parameters 854 * for an integer-valued sysctl function. 855 */ 856 int 857 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 858 { 859 int error = 0; 860 861 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 862 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 863 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 864 865 return (error); 866 } 867 868 869 /* 870 * As above, but read-only. 871 */ 872 int 873 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 874 { 875 int error = 0; 876 877 if (newp) 878 return (EPERM); 879 880 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 881 882 return (error); 883 } 884 885 /* 886 * Validate parameters and get old / set new parameters 887 * for an quad-valued sysctl function. 888 */ 889 int 890 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 891 quad_t *valp) 892 { 893 int error = 0; 894 895 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 896 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 897 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 898 899 return (error); 900 } 901 902 /* 903 * As above, but read-only. 904 */ 905 int 906 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 907 { 908 int error = 0; 909 910 if (newp) 911 return (EPERM); 912 913 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 914 915 return (error); 916 } 917 918 /* 919 * Validate parameters and get old / set new parameters 920 * for a string-valued sysctl function. 921 */ 922 int 923 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 924 int maxlen) 925 { 926 int len, error = 0, err2 = 0; 927 928 if (newp && newlen >= maxlen) 929 return (EINVAL); 930 931 SYSCTL_STRING_CORE(oldp, oldlenp, str); 932 933 if (error == 0 && newp) { 934 error = copyin(newp, str, newlen); 935 str[newlen] = 0; 936 } 937 return (error); 938 } 939 940 /* 941 * As above, but read-only. 942 */ 943 int 944 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 945 { 946 int len, error = 0, err2 = 0; 947 948 if (newp) 949 return (EPERM); 950 951 SYSCTL_STRING_CORE(oldp, oldlenp, str); 952 953 return (error); 954 } 955 956 /* 957 * Validate parameters and get old / set new parameters 958 * for a structure oriented sysctl function. 959 */ 960 int 961 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 962 int len) 963 { 964 int error = 0; 965 966 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 967 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 968 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 969 970 return (error); 971 } 972 973 /* 974 * Validate parameters and get old parameters 975 * for a structure oriented sysctl function. 976 */ 977 int 978 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 979 int len) 980 { 981 int error = 0; 982 983 if (newp) 984 return (EPERM); 985 986 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 987 988 return (error); 989 } 990 991 /* 992 * As above, but can return a truncated result. 993 */ 994 int 995 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 996 int len) 997 { 998 int error = 0; 999 1000 if (newp) 1001 return (EPERM); 1002 1003 len = min(*oldlenp, len); 1004 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1005 1006 return (error); 1007 } 1008 1009 /* 1010 * Get file structures. 1011 */ 1012 static int 1013 sysctl_file(void *vwhere, size_t *sizep) 1014 { 1015 int buflen, error; 1016 struct file *fp; 1017 char *start, *where; 1018 1019 start = where = vwhere; 1020 buflen = *sizep; 1021 if (where == NULL) { 1022 /* 1023 * overestimate by 10 files 1024 */ 1025 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1026 return (0); 1027 } 1028 1029 /* 1030 * first copyout filehead 1031 */ 1032 if (buflen < sizeof(filehead)) { 1033 *sizep = 0; 1034 return (0); 1035 } 1036 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1037 if (error) 1038 return (error); 1039 buflen -= sizeof(filehead); 1040 where += sizeof(filehead); 1041 1042 /* 1043 * followed by an array of file structures 1044 */ 1045 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1046 if (buflen < sizeof(struct file)) { 1047 *sizep = where - start; 1048 return (ENOMEM); 1049 } 1050 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1051 if (error) 1052 return (error); 1053 buflen -= sizeof(struct file); 1054 where += sizeof(struct file); 1055 } 1056 *sizep = where - start; 1057 return (0); 1058 } 1059 1060 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1061 #define FILL_PERM(src, dst) do { \ 1062 (dst)._key = (src)._key; \ 1063 (dst).uid = (src).uid; \ 1064 (dst).gid = (src).gid; \ 1065 (dst).cuid = (src).cuid; \ 1066 (dst).cgid = (src).cgid; \ 1067 (dst).mode = (src).mode; \ 1068 (dst)._seq = (src)._seq; \ 1069 } while (0); 1070 #define FILL_MSG(src, dst) do { \ 1071 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1072 (dst).msg_qnum = (src).msg_qnum; \ 1073 (dst).msg_qbytes = (src).msg_qbytes; \ 1074 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1075 (dst).msg_lspid = (src).msg_lspid; \ 1076 (dst).msg_lrpid = (src).msg_lrpid; \ 1077 (dst).msg_stime = (src).msg_stime; \ 1078 (dst).msg_rtime = (src).msg_rtime; \ 1079 (dst).msg_ctime = (src).msg_ctime; \ 1080 } while (0) 1081 #define FILL_SEM(src, dst) do { \ 1082 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1083 (dst).sem_nsems = (src).sem_nsems; \ 1084 (dst).sem_otime = (src).sem_otime; \ 1085 (dst).sem_ctime = (src).sem_ctime; \ 1086 } while (0) 1087 #define FILL_SHM(src, dst) do { \ 1088 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1089 (dst).shm_segsz = (src).shm_segsz; \ 1090 (dst).shm_lpid = (src).shm_lpid; \ 1091 (dst).shm_cpid = (src).shm_cpid; \ 1092 (dst).shm_atime = (src).shm_atime; \ 1093 (dst).shm_dtime = (src).shm_dtime; \ 1094 (dst).shm_ctime = (src).shm_ctime; \ 1095 (dst).shm_nattch = (src).shm_nattch; \ 1096 } while (0) 1097 1098 static int 1099 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1100 { 1101 #ifdef SYSVMSG 1102 struct msg_sysctl_info *msgsi; 1103 #endif 1104 #ifdef SYSVSEM 1105 struct sem_sysctl_info *semsi; 1106 #endif 1107 #ifdef SYSVSHM 1108 struct shm_sysctl_info *shmsi; 1109 #endif 1110 size_t infosize, dssize, tsize, buflen; 1111 void *buf = NULL, *buf2; 1112 char *start; 1113 int32_t nds; 1114 int i, error, ret; 1115 1116 if (namelen != 1) 1117 return (EINVAL); 1118 1119 start = where; 1120 buflen = *sizep; 1121 1122 switch (*name) { 1123 case KERN_SYSVIPC_MSG_INFO: 1124 #ifdef SYSVMSG 1125 infosize = sizeof(msgsi->msginfo); 1126 nds = msginfo.msgmni; 1127 dssize = sizeof(msgsi->msgids[0]); 1128 break; 1129 #else 1130 return (EINVAL); 1131 #endif 1132 case KERN_SYSVIPC_SEM_INFO: 1133 #ifdef SYSVSEM 1134 infosize = sizeof(semsi->seminfo); 1135 nds = seminfo.semmni; 1136 dssize = sizeof(semsi->semids[0]); 1137 break; 1138 #else 1139 return (EINVAL); 1140 #endif 1141 case KERN_SYSVIPC_SHM_INFO: 1142 #ifdef SYSVSHM 1143 infosize = sizeof(shmsi->shminfo); 1144 nds = shminfo.shmmni; 1145 dssize = sizeof(shmsi->shmids[0]); 1146 break; 1147 #else 1148 return (EINVAL); 1149 #endif 1150 default: 1151 return (EINVAL); 1152 } 1153 /* 1154 * Round infosize to 64 bit boundary if requesting more than just 1155 * the info structure or getting the total data size. 1156 */ 1157 if (where == NULL || *sizep > infosize) 1158 infosize = ((infosize + 7) / 8) * 8; 1159 tsize = infosize + nds * dssize; 1160 1161 /* Return just the total size required. */ 1162 if (where == NULL) { 1163 *sizep = tsize; 1164 return (0); 1165 } 1166 1167 /* Not enough room for even the info struct. */ 1168 if (buflen < infosize) { 1169 *sizep = 0; 1170 return (ENOMEM); 1171 } 1172 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1173 memset(buf, 0, min(tsize, buflen)); 1174 1175 switch (*name) { 1176 #ifdef SYSVMSG 1177 case KERN_SYSVIPC_MSG_INFO: 1178 msgsi = (struct msg_sysctl_info *)buf; 1179 buf2 = &msgsi->msgids[0]; 1180 msgsi->msginfo = msginfo; 1181 break; 1182 #endif 1183 #ifdef SYSVSEM 1184 case KERN_SYSVIPC_SEM_INFO: 1185 semsi = (struct sem_sysctl_info *)buf; 1186 buf2 = &semsi->semids[0]; 1187 semsi->seminfo = seminfo; 1188 break; 1189 #endif 1190 #ifdef SYSVSHM 1191 case KERN_SYSVIPC_SHM_INFO: 1192 shmsi = (struct shm_sysctl_info *)buf; 1193 buf2 = &shmsi->shmids[0]; 1194 shmsi->shminfo = shminfo; 1195 break; 1196 #endif 1197 } 1198 buflen -= infosize; 1199 1200 ret = 0; 1201 if (buflen > 0) { 1202 /* Fill in the IPC data structures. */ 1203 for (i = 0; i < nds; i++) { 1204 if (buflen < dssize) { 1205 ret = ENOMEM; 1206 break; 1207 } 1208 switch (*name) { 1209 #ifdef SYSVMSG 1210 case KERN_SYSVIPC_MSG_INFO: 1211 FILL_MSG(msqids[i], msgsi->msgids[i]); 1212 break; 1213 #endif 1214 #ifdef SYSVSEM 1215 case KERN_SYSVIPC_SEM_INFO: 1216 FILL_SEM(sema[i], semsi->semids[i]); 1217 break; 1218 #endif 1219 #ifdef SYSVSHM 1220 case KERN_SYSVIPC_SHM_INFO: 1221 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1222 break; 1223 #endif 1224 } 1225 buflen -= dssize; 1226 } 1227 } 1228 *sizep -= buflen; 1229 error = copyout(buf, start, *sizep); 1230 /* If copyout succeeded, use return code set earlier. */ 1231 if (error == 0) 1232 error = ret; 1233 if (buf) 1234 free(buf, M_TEMP); 1235 return (error); 1236 } 1237 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1238 1239 static int 1240 sysctl_msgbuf(void *vwhere, size_t *sizep) 1241 { 1242 char *where = vwhere; 1243 size_t len, maxlen = *sizep; 1244 long beg, end; 1245 int error; 1246 1247 /* 1248 * deal with cases where the message buffer has 1249 * become corrupted. 1250 */ 1251 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1252 msgbufenabled = 0; 1253 return (ENXIO); 1254 } 1255 1256 if (where == NULL) { 1257 /* always return full buffer size */ 1258 *sizep = msgbufp->msg_bufs; 1259 return (0); 1260 } 1261 1262 error = 0; 1263 maxlen = min(msgbufp->msg_bufs, maxlen); 1264 1265 /* 1266 * First, copy from the write pointer to the end of 1267 * message buffer. 1268 */ 1269 beg = msgbufp->msg_bufx; 1270 end = msgbufp->msg_bufs; 1271 while (maxlen > 0) { 1272 len = min(end - beg, maxlen); 1273 if (len == 0) 1274 break; 1275 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1276 if (error) 1277 break; 1278 where += len; 1279 maxlen -= len; 1280 1281 /* 1282 * ... then, copy from the beginning of message buffer to 1283 * the write pointer. 1284 */ 1285 beg = 0; 1286 end = msgbufp->msg_bufx; 1287 } 1288 return (error); 1289 } 1290 1291 /* 1292 * try over estimating by 5 procs 1293 */ 1294 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1295 1296 static int 1297 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1298 { 1299 struct eproc eproc; 1300 struct kinfo_proc2 kproc2; 1301 struct kinfo_proc *dp; 1302 struct proc *p; 1303 const struct proclist_desc *pd; 1304 char *where, *dp2; 1305 int type, op, arg, elem_size, elem_count; 1306 int buflen, needed, error; 1307 1308 dp = vwhere; 1309 dp2 = where = vwhere; 1310 buflen = where != NULL ? *sizep : 0; 1311 error = needed = 0; 1312 type = name[0]; 1313 1314 if (type == KERN_PROC) { 1315 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1316 return (EINVAL); 1317 op = name[1]; 1318 if (op != KERN_PROC_ALL) 1319 arg = name[2]; 1320 } else { 1321 if (namelen != 5) 1322 return (EINVAL); 1323 op = name[1]; 1324 arg = name[2]; 1325 elem_size = name[3]; 1326 elem_count = name[4]; 1327 } 1328 1329 proclist_lock_read(); 1330 1331 pd = proclists; 1332 again: 1333 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1334 /* 1335 * Skip embryonic processes. 1336 */ 1337 if (p->p_stat == SIDL) 1338 continue; 1339 /* 1340 * TODO - make more efficient (see notes below). 1341 * do by session. 1342 */ 1343 switch (op) { 1344 1345 case KERN_PROC_PID: 1346 /* could do this with just a lookup */ 1347 if (p->p_pid != (pid_t)arg) 1348 continue; 1349 break; 1350 1351 case KERN_PROC_PGRP: 1352 /* could do this by traversing pgrp */ 1353 if (p->p_pgrp->pg_id != (pid_t)arg) 1354 continue; 1355 break; 1356 1357 case KERN_PROC_SESSION: 1358 if (p->p_session->s_sid != (pid_t)arg) 1359 continue; 1360 break; 1361 1362 case KERN_PROC_TTY: 1363 if (arg == KERN_PROC_TTY_REVOKE) { 1364 if ((p->p_flag & P_CONTROLT) == 0 || 1365 p->p_session->s_ttyp == NULL || 1366 p->p_session->s_ttyvp != NULL) 1367 continue; 1368 } else if ((p->p_flag & P_CONTROLT) == 0 || 1369 p->p_session->s_ttyp == NULL) { 1370 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1371 continue; 1372 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1373 continue; 1374 break; 1375 1376 case KERN_PROC_UID: 1377 if (p->p_ucred->cr_uid != (uid_t)arg) 1378 continue; 1379 break; 1380 1381 case KERN_PROC_RUID: 1382 if (p->p_cred->p_ruid != (uid_t)arg) 1383 continue; 1384 break; 1385 1386 case KERN_PROC_GID: 1387 if (p->p_ucred->cr_gid != (uid_t)arg) 1388 continue; 1389 break; 1390 1391 case KERN_PROC_RGID: 1392 if (p->p_cred->p_rgid != (uid_t)arg) 1393 continue; 1394 break; 1395 1396 case KERN_PROC_ALL: 1397 /* allow everything */ 1398 break; 1399 1400 default: 1401 error = EINVAL; 1402 goto cleanup; 1403 } 1404 if (type == KERN_PROC) { 1405 if (buflen >= sizeof(struct kinfo_proc)) { 1406 fill_eproc(p, &eproc); 1407 error = copyout((caddr_t)p, &dp->kp_proc, 1408 sizeof(struct proc)); 1409 if (error) 1410 goto cleanup; 1411 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1412 sizeof(eproc)); 1413 if (error) 1414 goto cleanup; 1415 dp++; 1416 buflen -= sizeof(struct kinfo_proc); 1417 } 1418 needed += sizeof(struct kinfo_proc); 1419 } else { /* KERN_PROC2 */ 1420 if (buflen >= elem_size && elem_count > 0) { 1421 fill_kproc2(p, &kproc2); 1422 /* 1423 * Copy out elem_size, but not larger than 1424 * the size of a struct kinfo_proc2. 1425 */ 1426 error = copyout(&kproc2, dp2, 1427 min(sizeof(kproc2), elem_size)); 1428 if (error) 1429 goto cleanup; 1430 dp2 += elem_size; 1431 buflen -= elem_size; 1432 elem_count--; 1433 } 1434 needed += elem_size; 1435 } 1436 } 1437 pd++; 1438 if (pd->pd_list != NULL) 1439 goto again; 1440 proclist_unlock_read(); 1441 1442 if (where != NULL) { 1443 if (type == KERN_PROC) 1444 *sizep = (caddr_t)dp - where; 1445 else 1446 *sizep = dp2 - where; 1447 if (needed > *sizep) 1448 return (ENOMEM); 1449 } else { 1450 needed += KERN_PROCSLOP; 1451 *sizep = needed; 1452 } 1453 return (0); 1454 cleanup: 1455 proclist_unlock_read(); 1456 return (error); 1457 } 1458 1459 /* 1460 * Fill in an eproc structure for the specified process. 1461 */ 1462 void 1463 fill_eproc(struct proc *p, struct eproc *ep) 1464 { 1465 struct tty *tp; 1466 struct lwp *l; 1467 1468 ep->e_paddr = p; 1469 ep->e_sess = p->p_session; 1470 ep->e_pcred = *p->p_cred; 1471 ep->e_ucred = *p->p_ucred; 1472 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1473 ep->e_vm.vm_rssize = 0; 1474 ep->e_vm.vm_tsize = 0; 1475 ep->e_vm.vm_dsize = 0; 1476 ep->e_vm.vm_ssize = 0; 1477 /* ep->e_vm.vm_pmap = XXX; */ 1478 } else { 1479 struct vmspace *vm = p->p_vmspace; 1480 1481 ep->e_vm.vm_rssize = vm_resident_count(vm); 1482 ep->e_vm.vm_tsize = vm->vm_tsize; 1483 ep->e_vm.vm_dsize = vm->vm_dsize; 1484 ep->e_vm.vm_ssize = vm->vm_ssize; 1485 1486 /* Pick a "representative" LWP */ 1487 l = proc_representative_lwp(p); 1488 1489 if (l->l_wmesg) 1490 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1491 } 1492 if (p->p_pptr) 1493 ep->e_ppid = p->p_pptr->p_pid; 1494 else 1495 ep->e_ppid = 0; 1496 ep->e_pgid = p->p_pgrp->pg_id; 1497 ep->e_sid = ep->e_sess->s_sid; 1498 ep->e_jobc = p->p_pgrp->pg_jobc; 1499 if ((p->p_flag & P_CONTROLT) && 1500 (tp = ep->e_sess->s_ttyp)) { 1501 ep->e_tdev = tp->t_dev; 1502 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1503 ep->e_tsess = tp->t_session; 1504 } else 1505 ep->e_tdev = NODEV; 1506 1507 ep->e_xsize = ep->e_xrssize = 0; 1508 ep->e_xccount = ep->e_xswrss = 0; 1509 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1510 if (SESS_LEADER(p)) 1511 ep->e_flag |= EPROC_SLEADER; 1512 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1513 } 1514 1515 /* 1516 * Fill in an eproc structure for the specified process. 1517 */ 1518 static void 1519 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1520 { 1521 struct tty *tp; 1522 struct lwp *l; 1523 memset(ki, 0, sizeof(*ki)); 1524 1525 /* XXX NJWLWP 1526 * These are likely not what the caller was looking for. 1527 * The perils of playing with the kernel data structures... 1528 */ 1529 ki->p_paddr = PTRTOINT64(p); 1530 ki->p_fd = PTRTOINT64(p->p_fd); 1531 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1532 ki->p_stats = PTRTOINT64(p->p_stats); 1533 ki->p_limit = PTRTOINT64(p->p_limit); 1534 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1535 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1536 ki->p_sess = PTRTOINT64(p->p_session); 1537 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1538 ki->p_ru = PTRTOINT64(p->p_ru); 1539 1540 ki->p_eflag = 0; 1541 ki->p_exitsig = p->p_exitsig; 1542 ki->p_flag = p->p_flag; 1543 1544 ki->p_pid = p->p_pid; 1545 if (p->p_pptr) 1546 ki->p_ppid = p->p_pptr->p_pid; 1547 else 1548 ki->p_ppid = 0; 1549 ki->p_sid = p->p_session->s_sid; 1550 ki->p__pgid = p->p_pgrp->pg_id; 1551 1552 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1553 1554 ki->p_uid = p->p_ucred->cr_uid; 1555 ki->p_ruid = p->p_cred->p_ruid; 1556 ki->p_gid = p->p_ucred->cr_gid; 1557 ki->p_rgid = p->p_cred->p_rgid; 1558 1559 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1560 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1561 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1562 1563 ki->p_jobc = p->p_pgrp->pg_jobc; 1564 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1565 ki->p_tdev = tp->t_dev; 1566 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1567 ki->p_tsess = PTRTOINT64(tp->t_session); 1568 } else { 1569 ki->p_tdev = NODEV; 1570 } 1571 1572 ki->p_estcpu = p->p_estcpu; 1573 ki->p_rtime_sec = p->p_rtime.tv_sec; 1574 ki->p_rtime_usec = p->p_rtime.tv_usec; 1575 ki->p_cpticks = p->p_cpticks; 1576 ki->p_pctcpu = p->p_pctcpu; 1577 1578 ki->p_uticks = p->p_uticks; 1579 ki->p_sticks = p->p_sticks; 1580 ki->p_iticks = p->p_iticks; 1581 1582 ki->p_tracep = PTRTOINT64(p->p_tracep); 1583 ki->p_traceflag = p->p_traceflag; 1584 1585 1586 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1587 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1588 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1589 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1590 1591 ki->p_stat = p->p_stat; 1592 ki->p_nice = p->p_nice; 1593 1594 ki->p_xstat = p->p_xstat; 1595 ki->p_acflag = p->p_acflag; 1596 1597 strncpy(ki->p_comm, p->p_comm, 1598 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1599 1600 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1601 1602 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1603 ki->p_vm_rssize = 0; 1604 ki->p_vm_tsize = 0; 1605 ki->p_vm_dsize = 0; 1606 ki->p_vm_ssize = 0; 1607 } else { 1608 struct vmspace *vm = p->p_vmspace; 1609 1610 ki->p_vm_rssize = vm_resident_count(vm); 1611 ki->p_vm_tsize = vm->vm_tsize; 1612 ki->p_vm_dsize = vm->vm_dsize; 1613 ki->p_vm_ssize = vm->vm_ssize; 1614 1615 /* Pick a "representative" LWP */ 1616 l = proc_representative_lwp(p); 1617 ki->p_forw = PTRTOINT64(l->l_forw); 1618 ki->p_back = PTRTOINT64(l->l_back); 1619 ki->p_addr = PTRTOINT64(l->l_addr); 1620 ki->p_stat = l->l_stat; 1621 ki->p_flag |= l->l_flag; 1622 ki->p_swtime = l->l_swtime; 1623 ki->p_slptime = l->l_slptime; 1624 if (l->l_stat == LSONPROC) { 1625 KDASSERT(l->l_cpu != NULL); 1626 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1627 } else 1628 ki->p_schedflags = 0; 1629 ki->p_holdcnt = l->l_holdcnt; 1630 ki->p_priority = l->l_priority; 1631 ki->p_usrpri = l->l_usrpri; 1632 if (l->l_wmesg) 1633 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1634 ki->p_wchan = PTRTOINT64(l->l_wchan); 1635 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_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 1686 1687 1688 1689 int 1690 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1691 struct proc *up) 1692 { 1693 struct ps_strings pss; 1694 struct proc *p; 1695 size_t len, upper_bound, xlen; 1696 struct uio auio; 1697 struct iovec aiov; 1698 vaddr_t argv; 1699 pid_t pid; 1700 int nargv, type, error, i; 1701 char *arg; 1702 char *tmp; 1703 1704 if (namelen != 2) 1705 return (EINVAL); 1706 pid = name[0]; 1707 type = name[1]; 1708 1709 switch (type) { 1710 case KERN_PROC_ARGV: 1711 case KERN_PROC_NARGV: 1712 case KERN_PROC_ENV: 1713 case KERN_PROC_NENV: 1714 /* ok */ 1715 break; 1716 default: 1717 return (EINVAL); 1718 } 1719 1720 /* check pid */ 1721 if ((p = pfind(pid)) == NULL) 1722 return (EINVAL); 1723 1724 /* only root or same user change look at the environment */ 1725 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1726 if (up->p_ucred->cr_uid != 0) { 1727 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1728 up->p_cred->p_ruid != p->p_cred->p_svuid) 1729 return (EPERM); 1730 } 1731 } 1732 1733 if (sizep != NULL && where == NULL) { 1734 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1735 *sizep = sizeof (int); 1736 else 1737 *sizep = ARG_MAX; /* XXX XXX XXX */ 1738 return (0); 1739 } 1740 if (where == NULL || sizep == NULL) 1741 return (EINVAL); 1742 1743 /* 1744 * Zombies don't have a stack, so we can't read their psstrings. 1745 * System processes also don't have a user stack. 1746 */ 1747 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1748 return (EINVAL); 1749 1750 /* 1751 * Lock the process down in memory. 1752 */ 1753 /* XXXCDC: how should locking work here? */ 1754 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1755 return (EFAULT); 1756 1757 p->p_vmspace->vm_refcnt++; /* XXX */ 1758 1759 /* 1760 * Allocate a temporary buffer to hold the arguments. 1761 */ 1762 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1763 1764 /* 1765 * Read in the ps_strings structure. 1766 */ 1767 aiov.iov_base = &pss; 1768 aiov.iov_len = sizeof(pss); 1769 auio.uio_iov = &aiov; 1770 auio.uio_iovcnt = 1; 1771 auio.uio_offset = (vaddr_t)p->p_psstr; 1772 auio.uio_resid = sizeof(pss); 1773 auio.uio_segflg = UIO_SYSSPACE; 1774 auio.uio_rw = UIO_READ; 1775 auio.uio_procp = NULL; 1776 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1777 if (error) 1778 goto done; 1779 1780 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1781 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1782 else 1783 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1784 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1785 error = copyout(&nargv, where, sizeof(nargv)); 1786 *sizep = sizeof(nargv); 1787 goto done; 1788 } 1789 /* 1790 * Now read the address of the argument vector. 1791 */ 1792 switch (type) { 1793 case KERN_PROC_ARGV: 1794 /* XXX compat32 stuff here */ 1795 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1796 break; 1797 case KERN_PROC_ENV: 1798 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1799 break; 1800 default: 1801 return (EINVAL); 1802 } 1803 auio.uio_offset = (off_t)(long)tmp; 1804 aiov.iov_base = &argv; 1805 aiov.iov_len = sizeof(argv); 1806 auio.uio_iov = &aiov; 1807 auio.uio_iovcnt = 1; 1808 auio.uio_resid = sizeof(argv); 1809 auio.uio_segflg = UIO_SYSSPACE; 1810 auio.uio_rw = UIO_READ; 1811 auio.uio_procp = NULL; 1812 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1813 if (error) 1814 goto done; 1815 1816 /* 1817 * Now copy in the actual argument vector, one page at a time, 1818 * since we don't know how long the vector is (though, we do 1819 * know how many NUL-terminated strings are in the vector). 1820 */ 1821 len = 0; 1822 upper_bound = *sizep; 1823 for (; nargv != 0 && len < upper_bound; len += xlen) { 1824 aiov.iov_base = arg; 1825 aiov.iov_len = PAGE_SIZE; 1826 auio.uio_iov = &aiov; 1827 auio.uio_iovcnt = 1; 1828 auio.uio_offset = argv + len; 1829 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1830 auio.uio_resid = xlen; 1831 auio.uio_segflg = UIO_SYSSPACE; 1832 auio.uio_rw = UIO_READ; 1833 auio.uio_procp = NULL; 1834 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1835 if (error) 1836 goto done; 1837 1838 for (i = 0; i < xlen && nargv != 0; i++) { 1839 if (arg[i] == '\0') 1840 nargv--; /* one full string */ 1841 } 1842 1843 /* make sure we don't copyout past the end of the user's buffer */ 1844 if (len + i > upper_bound) 1845 i = upper_bound - len; 1846 1847 error = copyout(arg, (char *)where + len, i); 1848 if (error) 1849 break; 1850 1851 if (nargv == 0) { 1852 len += i; 1853 break; 1854 } 1855 } 1856 *sizep = len; 1857 1858 done: 1859 uvmspace_free(p->p_vmspace); 1860 1861 free(arg, M_TEMP); 1862 return (error); 1863 } 1864 1865 #if NPTY > 0 1866 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1867 1868 /* 1869 * Validate parameters and get old / set new parameters 1870 * for pty sysctl function. 1871 */ 1872 static int 1873 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 1874 { 1875 int error = 0; 1876 int oldmax = 0, newmax = 0; 1877 1878 /* get current value of maxptys */ 1879 oldmax = pty_maxptys(0, 0); 1880 1881 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1882 1883 if (!error && newp) { 1884 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1885 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1886 1887 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1888 return (EINVAL); 1889 1890 } 1891 1892 return (error); 1893 } 1894 #endif /* NPTY > 0 */ 1895
Indexes created Tue Sep 30 06:09:59 GMT 2025