kern_sysctl.c revision 1.99
1 /* $NetBSD: kern_sysctl.c,v 1.99 2002/01/27 13:33:36 lukem 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 1.99 2002/01/27 13:33:36 lukem 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/proc.h> 70 #include <sys/resource.h> 71 #include <sys/resourcevar.h> 72 #include <sys/syscallargs.h> 73 #include <sys/tty.h> 74 #include <sys/unistd.h> 75 #include <sys/vnode.h> 76 #include <sys/socketvar.h> 77 #define __SYSCTL_PRIVATE 78 #include <sys/sysctl.h> 79 #include <sys/lock.h> 80 #include <sys/namei.h> 81 82 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 83 #include <sys/ipc.h> 84 #endif 85 #ifdef SYSVMSG 86 #include <sys/msg.h> 87 #endif 88 #ifdef SYSVSEM 89 #include <sys/sem.h> 90 #endif 91 #ifdef SYSVSHM 92 #include <sys/shm.h> 93 #endif 94 95 #include <dev/cons.h> 96 97 #if defined(DDB) 98 #include <ddb/ddbvar.h> 99 #endif 100 101 #ifdef NEW_PIPE 102 #include <sys/pipe.h> 103 #endif 104 105 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 106 107 static int sysctl_file(void *, size_t *); 108 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 109 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 110 #endif 111 static int sysctl_msgbuf(void *, size_t *); 112 static int sysctl_doeproc(int *, u_int, void *, size_t *); 113 #ifdef MULTIPROCESSOR 114 static int sysctl_docptime(void *, size_t *, void *); 115 static int sysctl_ncpus(void); 116 #endif 117 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 118 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 119 #if NPTY > 0 120 static int sysctl_pty(void *, size_t *, void *, size_t); 121 #endif 122 123 /* 124 * The `sysctl_memlock' is intended to keep too many processes from 125 * locking down memory by doing sysctls at once. Whether or not this 126 * is really a good idea to worry about it probably a subject of some 127 * debate. 128 */ 129 struct lock sysctl_memlock; 130 131 void 132 sysctl_init(void) 133 { 134 135 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 136 } 137 138 int 139 sys___sysctl(struct proc *p, void *v, register_t *retval) 140 { 141 struct sys___sysctl_args /* { 142 syscallarg(int *) name; 143 syscallarg(u_int) namelen; 144 syscallarg(void *) old; 145 syscallarg(size_t *) oldlenp; 146 syscallarg(void *) new; 147 syscallarg(size_t) newlen; 148 } */ *uap = v; 149 int error; 150 size_t savelen = 0, oldlen = 0; 151 sysctlfn *fn; 152 int name[CTL_MAXNAME]; 153 size_t *oldlenp; 154 155 /* 156 * all top-level sysctl names are non-terminal 157 */ 158 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 159 return (EINVAL); 160 error = copyin(SCARG(uap, name), &name, 161 SCARG(uap, namelen) * sizeof(int)); 162 if (error) 163 return (error); 164 165 /* 166 * For all but CTL_PROC, must be root to change a value. 167 * For CTL_PROC, must be root, or owner of the proc (and not suid), 168 * this is checked in proc_sysctl() (once we know the targer proc). 169 */ 170 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 171 (error = suser(p->p_ucred, &p->p_acflag))) 172 return error; 173 174 switch (name[0]) { 175 case CTL_KERN: 176 fn = kern_sysctl; 177 break; 178 case CTL_HW: 179 fn = hw_sysctl; 180 break; 181 case CTL_VM: 182 fn = uvm_sysctl; 183 break; 184 case CTL_NET: 185 fn = net_sysctl; 186 break; 187 case CTL_VFS: 188 fn = vfs_sysctl; 189 break; 190 case CTL_MACHDEP: 191 fn = cpu_sysctl; 192 break; 193 #ifdef DEBUG 194 case CTL_DEBUG: 195 fn = debug_sysctl; 196 break; 197 #endif 198 #ifdef DDB 199 case CTL_DDB: 200 fn = ddb_sysctl; 201 break; 202 #endif 203 case CTL_PROC: 204 fn = proc_sysctl; 205 break; 206 default: 207 return (EOPNOTSUPP); 208 } 209 210 /* 211 * XXX Hey, we wire `old', but what about `new'? 212 */ 213 214 oldlenp = SCARG(uap, oldlenp); 215 if (oldlenp) { 216 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 217 return (error); 218 oldlenp = &oldlen; 219 } 220 if (SCARG(uap, old) != NULL) { 221 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 222 if (error) 223 return (error); 224 error = uvm_vslock(p, SCARG(uap, old), oldlen, 225 VM_PROT_READ|VM_PROT_WRITE); 226 if (error) { 227 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 228 return error; 229 } 230 savelen = oldlen; 231 } 232 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 233 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 234 if (SCARG(uap, old) != NULL) { 235 uvm_vsunlock(p, SCARG(uap, old), savelen); 236 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 237 } 238 if (error) 239 return (error); 240 if (SCARG(uap, oldlenp)) 241 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 242 return (error); 243 } 244 245 /* 246 * Attributes stored in the kernel. 247 */ 248 char hostname[MAXHOSTNAMELEN]; 249 int hostnamelen; 250 251 char domainname[MAXHOSTNAMELEN]; 252 int domainnamelen; 253 254 long hostid; 255 256 #ifdef INSECURE 257 int securelevel = -1; 258 #else 259 int securelevel = 0; 260 #endif 261 262 #ifndef DEFCORENAME 263 #define DEFCORENAME "%n.core" 264 #endif 265 char defcorename[MAXPATHLEN] = DEFCORENAME; 266 int defcorenamelen = sizeof(DEFCORENAME); 267 268 extern int kern_logsigexit; 269 extern fixpt_t ccpu; 270 271 #ifndef MULTIPROCESSOR 272 #define sysctl_ncpus() 1 273 #endif 274 275 #ifdef MULTIPROCESSOR 276 277 #ifndef CPU_INFO_FOREACH 278 #define CPU_INFO_ITERATOR int 279 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 280 #endif 281 282 static int 283 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 284 { 285 u_int64_t cp_time[CPUSTATES]; 286 int i; 287 struct cpu_info *ci; 288 CPU_INFO_ITERATOR cii; 289 290 for (i=0; i<CPUSTATES; i++) 291 cp_time[i] = 0; 292 293 for (CPU_INFO_FOREACH(cii, ci)) { 294 for (i=0; i<CPUSTATES; i++) 295 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 296 } 297 return (sysctl_rdstruct(oldp, oldlenp, newp, 298 cp_time, sizeof(cp_time))); 299 } 300 301 static int 302 sysctl_ncpus(void) 303 { 304 struct cpu_info *ci; 305 CPU_INFO_ITERATOR cii; 306 307 int ncpus = 0; 308 for (CPU_INFO_FOREACH(cii, ci)) 309 ncpus++; 310 return ncpus; 311 } 312 313 #endif 314 315 /* 316 * kernel related system variables. 317 */ 318 int 319 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 320 void *newp, size_t newlen, struct proc *p) 321 { 322 int error, level, inthostid; 323 int old_autonicetime; 324 int old_vnodes; 325 dev_t consdev; 326 327 /* All sysctl names at this level, except for a few, are terminal. */ 328 switch (name[0]) { 329 case KERN_PROC: 330 case KERN_PROC2: 331 case KERN_PROF: 332 case KERN_MBUF: 333 case KERN_PROC_ARGS: 334 case KERN_SYSVIPC_INFO: 335 case KERN_PIPE: 336 /* Not terminal. */ 337 break; 338 default: 339 if (namelen != 1) 340 return (ENOTDIR); /* overloaded */ 341 } 342 343 switch (name[0]) { 344 case KERN_OSTYPE: 345 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 346 case KERN_OSRELEASE: 347 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 348 case KERN_OSREV: 349 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 350 case KERN_VERSION: 351 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 352 case KERN_MAXVNODES: 353 old_vnodes = desiredvnodes; 354 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 355 if (newp && !error) { 356 if (old_vnodes > desiredvnodes) { 357 desiredvnodes = old_vnodes; 358 return (EINVAL); 359 } 360 vfs_reinit(); 361 nchreinit(); 362 } 363 return (error); 364 case KERN_MAXPROC: 365 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 366 case KERN_MAXFILES: 367 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 368 case KERN_ARGMAX: 369 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 370 case KERN_SECURELVL: 371 level = securelevel; 372 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 373 newp == NULL) 374 return (error); 375 if (level < securelevel && p->p_pid != 1) 376 return (EPERM); 377 securelevel = level; 378 return (0); 379 case KERN_HOSTNAME: 380 error = sysctl_string(oldp, oldlenp, newp, newlen, 381 hostname, sizeof(hostname)); 382 if (newp && !error) 383 hostnamelen = newlen; 384 return (error); 385 case KERN_DOMAINNAME: 386 error = sysctl_string(oldp, oldlenp, newp, newlen, 387 domainname, sizeof(domainname)); 388 if (newp && !error) 389 domainnamelen = newlen; 390 return (error); 391 case KERN_HOSTID: 392 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 393 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 394 if (newp && !error) 395 hostid = inthostid; 396 return (error); 397 case KERN_CLOCKRATE: 398 return (sysctl_clockrate(oldp, oldlenp)); 399 case KERN_BOOTTIME: 400 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 401 sizeof(struct timeval))); 402 case KERN_VNODE: 403 return (sysctl_vnode(oldp, oldlenp, p)); 404 case KERN_PROC: 405 case KERN_PROC2: 406 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 407 case KERN_PROC_ARGS: 408 return (sysctl_procargs(name + 1, namelen - 1, 409 oldp, oldlenp, p)); 410 case KERN_FILE: 411 return (sysctl_file(oldp, oldlenp)); 412 #ifdef GPROF 413 case KERN_PROF: 414 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 415 newp, newlen)); 416 #endif 417 case KERN_POSIX1: 418 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 419 case KERN_NGROUPS: 420 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 421 case KERN_JOB_CONTROL: 422 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 423 case KERN_SAVED_IDS: 424 #ifdef _POSIX_SAVED_IDS 425 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 426 #else 427 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 428 #endif 429 case KERN_MAXPARTITIONS: 430 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 431 case KERN_RAWPARTITION: 432 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 433 #ifdef NTP 434 case KERN_NTPTIME: 435 return (sysctl_ntptime(oldp, oldlenp)); 436 #endif 437 case KERN_AUTONICETIME: 438 old_autonicetime = autonicetime; 439 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 440 if (autonicetime < 0) 441 autonicetime = old_autonicetime; 442 return (error); 443 case KERN_AUTONICEVAL: 444 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 445 if (autoniceval < PRIO_MIN) 446 autoniceval = PRIO_MIN; 447 if (autoniceval > PRIO_MAX) 448 autoniceval = PRIO_MAX; 449 return (error); 450 case KERN_RTC_OFFSET: 451 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 452 case KERN_ROOT_DEVICE: 453 return (sysctl_rdstring(oldp, oldlenp, newp, 454 root_device->dv_xname)); 455 case KERN_MSGBUFSIZE: 456 /* 457 * deal with cases where the message buffer has 458 * become corrupted. 459 */ 460 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 461 msgbufenabled = 0; 462 return (ENXIO); 463 } 464 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 465 case KERN_FSYNC: 466 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 467 case KERN_SYSVMSG: 468 #ifdef SYSVMSG 469 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 470 #else 471 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 472 #endif 473 case KERN_SYSVSEM: 474 #ifdef SYSVSEM 475 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 476 #else 477 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 478 #endif 479 case KERN_SYSVSHM: 480 #ifdef SYSVSHM 481 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 482 #else 483 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 484 #endif 485 case KERN_DEFCORENAME: 486 if (newp && newlen < 1) 487 return (EINVAL); 488 error = sysctl_string(oldp, oldlenp, newp, newlen, 489 defcorename, sizeof(defcorename)); 490 if (newp && !error) 491 defcorenamelen = newlen; 492 return (error); 493 case KERN_SYNCHRONIZED_IO: 494 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 495 case KERN_IOV_MAX: 496 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 497 case KERN_MBUF: 498 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 499 newp, newlen)); 500 case KERN_MAPPED_FILES: 501 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 502 case KERN_MEMLOCK: 503 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 504 case KERN_MEMLOCK_RANGE: 505 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 506 case KERN_MEMORY_PROTECTION: 507 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 508 case KERN_LOGIN_NAME_MAX: 509 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 510 case KERN_LOGSIGEXIT: 511 return (sysctl_int(oldp, oldlenp, newp, newlen, 512 &kern_logsigexit)); 513 case KERN_FSCALE: 514 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 515 case KERN_CCPU: 516 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 517 case KERN_CP_TIME: 518 #ifndef MULTIPROCESSOR 519 return (sysctl_rdstruct(oldp, oldlenp, newp, 520 curcpu()->ci_schedstate.spc_cp_time, 521 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 522 #else 523 return (sysctl_docptime(oldp, oldlenp, newp)); 524 #endif 525 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 526 case KERN_SYSVIPC_INFO: 527 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 528 #endif 529 case KERN_MSGBUF: 530 return (sysctl_msgbuf(oldp, oldlenp)); 531 case KERN_CONSDEV: 532 if (cn_tab != NULL) 533 consdev = cn_tab->cn_dev; 534 else 535 consdev = NODEV; 536 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 537 sizeof consdev)); 538 #if NPTY > 0 539 case KERN_MAXPTYS: 540 return sysctl_pty(oldp, oldlenp, newp, newlen); 541 #endif 542 #ifdef NEW_PIPE 543 case KERN_PIPE: 544 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 545 newp, newlen)); 546 #endif 547 case KERN_MAXPHYS: 548 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 549 case KERN_SBMAX: 550 { 551 int new_sbmax = sb_max; 552 553 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 554 if (newp && !error) { 555 if (new_sbmax < (16 * 1024)) /* sanity */ 556 return (EINVAL); 557 sb_max = new_sbmax; 558 } 559 return (error); 560 } 561 default: 562 return (EOPNOTSUPP); 563 } 564 /* NOTREACHED */ 565 } 566 567 /* 568 * hardware related system variables. 569 */ 570 int 571 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 572 void *newp, size_t newlen, struct proc *p) 573 { 574 575 /* All sysctl names at this level, except for a few, are terminal. */ 576 switch (name[0]) { 577 case HW_DISKSTATS: 578 /* Not terminal. */ 579 break; 580 default: 581 if (namelen != 1) 582 return (ENOTDIR); /* overloaded */ 583 } 584 585 switch (name[0]) { 586 case HW_MACHINE: 587 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 588 case HW_MACHINE_ARCH: 589 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 590 case HW_MODEL: 591 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 592 case HW_NCPU: 593 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 594 case HW_BYTEORDER: 595 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 596 case HW_PHYSMEM: 597 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 598 case HW_USERMEM: 599 return (sysctl_rdint(oldp, oldlenp, newp, 600 ctob(physmem - uvmexp.wired))); 601 case HW_PAGESIZE: 602 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 603 case HW_ALIGNBYTES: 604 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 605 case HW_DISKNAMES: 606 return (sysctl_disknames(oldp, oldlenp)); 607 case HW_DISKSTATS: 608 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 609 case HW_CNMAGIC: { 610 char magic[CNS_LEN]; 611 int error; 612 613 if (oldp) 614 cn_get_magic(magic, CNS_LEN); 615 error = sysctl_string(oldp, oldlenp, newp, newlen, 616 magic, sizeof(magic)); 617 if (newp && !error) { 618 error = cn_set_magic(magic); 619 } 620 return (error); 621 } 622 default: 623 return (EOPNOTSUPP); 624 } 625 /* NOTREACHED */ 626 } 627 628 #ifdef DEBUG 629 /* 630 * Debugging related system variables. 631 */ 632 struct ctldebug debug0, debug1, debug2, debug3, debug4; 633 struct ctldebug debug5, debug6, debug7, debug8, debug9; 634 struct ctldebug debug10, debug11, debug12, debug13, debug14; 635 struct ctldebug debug15, debug16, debug17, debug18, debug19; 636 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 637 &debug0, &debug1, &debug2, &debug3, &debug4, 638 &debug5, &debug6, &debug7, &debug8, &debug9, 639 &debug10, &debug11, &debug12, &debug13, &debug14, 640 &debug15, &debug16, &debug17, &debug18, &debug19, 641 }; 642 643 int 644 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 645 void *newp, size_t newlen, struct proc *p) 646 { 647 struct ctldebug *cdp; 648 649 /* all sysctl names at this level are name and field */ 650 if (namelen != 2) 651 return (ENOTDIR); /* overloaded */ 652 cdp = debugvars[name[0]]; 653 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 654 return (EOPNOTSUPP); 655 switch (name[1]) { 656 case CTL_DEBUG_NAME: 657 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 658 case CTL_DEBUG_VALUE: 659 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 660 default: 661 return (EOPNOTSUPP); 662 } 663 /* NOTREACHED */ 664 } 665 #endif /* DEBUG */ 666 667 int 668 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 669 void *newp, size_t newlen, struct proc *p) 670 { 671 struct proc *ptmp = NULL; 672 const struct proclist_desc *pd; 673 int error = 0; 674 struct rlimit alim; 675 struct plimit *newplim; 676 char *tmps = NULL; 677 int i, curlen, len; 678 679 if (namelen < 2) 680 return EINVAL; 681 682 if (name[0] == PROC_CURPROC) { 683 ptmp = p; 684 } else { 685 proclist_lock_read(); 686 for (pd = proclists; pd->pd_list != NULL; pd++) { 687 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 688 ptmp = LIST_NEXT(ptmp, p_list)) { 689 /* Skip embryonic processes. */ 690 if (ptmp->p_stat == SIDL) 691 continue; 692 if (ptmp->p_pid == (pid_t)name[0]) 693 break; 694 } 695 if (ptmp != NULL) 696 break; 697 } 698 proclist_unlock_read(); 699 if (ptmp == NULL) 700 return(ESRCH); 701 if (p->p_ucred->cr_uid != 0) { 702 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 703 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 704 return EPERM; 705 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 706 return EPERM; /* sgid proc */ 707 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 708 if (p->p_ucred->cr_groups[i] == 709 ptmp->p_cred->p_rgid) 710 break; 711 } 712 if (i == p->p_ucred->cr_ngroups) 713 return EPERM; 714 } 715 } 716 if (name[1] == PROC_PID_CORENAME) { 717 if (namelen != 2) 718 return EINVAL; 719 /* 720 * Can't use sysctl_string() here because we may malloc a new 721 * area during the process, so we have to do it by hand. 722 */ 723 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 724 if (oldlenp && *oldlenp < curlen) { 725 if (!oldp) 726 *oldlenp = curlen; 727 return (ENOMEM); 728 } 729 if (newp) { 730 if (securelevel > 2) 731 return EPERM; 732 if (newlen > MAXPATHLEN) 733 return ENAMETOOLONG; 734 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 735 if (tmps == NULL) 736 return ENOMEM; 737 error = copyin(newp, tmps, newlen + 1); 738 tmps[newlen] = '\0'; 739 if (error) 740 goto cleanup; 741 /* Enforce to be either 'core' for end with '.core' */ 742 if (newlen < 4) { /* c.o.r.e */ 743 error = EINVAL; 744 goto cleanup; 745 } 746 len = newlen - 4; 747 if (len > 0) { 748 if (tmps[len - 1] != '.' && 749 tmps[len - 1] != '/') { 750 error = EINVAL; 751 goto cleanup; 752 } 753 } 754 if (strcmp(&tmps[len], "core") != 0) { 755 error = EINVAL; 756 goto cleanup; 757 } 758 } 759 if (oldp && oldlenp) { 760 *oldlenp = curlen; 761 error = copyout(ptmp->p_limit->pl_corename, oldp, 762 curlen); 763 } 764 if (newp && error == 0) { 765 /* if the 2 strings are identical, don't limcopy() */ 766 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 767 error = 0; 768 goto cleanup; 769 } 770 if (ptmp->p_limit->p_refcnt > 1 && 771 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 772 newplim = limcopy(ptmp->p_limit); 773 limfree(ptmp->p_limit); 774 ptmp->p_limit = newplim; 775 } 776 if (ptmp->p_limit->pl_corename != defcorename) { 777 free(ptmp->p_limit->pl_corename, M_TEMP); 778 } 779 ptmp->p_limit->pl_corename = tmps; 780 return (0); 781 } 782 cleanup: 783 if (tmps) 784 free(tmps, M_TEMP); 785 return (error); 786 } 787 if (name[1] == PROC_PID_LIMIT) { 788 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 789 return EINVAL; 790 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 791 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 792 error = sysctl_quad(oldp, oldlenp, newp, newlen, 793 &alim.rlim_max); 794 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 795 error = sysctl_quad(oldp, oldlenp, newp, newlen, 796 &alim.rlim_cur); 797 else 798 error = EINVAL; 799 800 if (error) 801 return error; 802 803 if (newp) 804 error = dosetrlimit(ptmp, p->p_cred, 805 name[2] - 1, &alim); 806 return error; 807 } 808 return (EINVAL); 809 } 810 811 /* 812 * Convenience macros. 813 */ 814 815 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 816 if (oldlenp) { \ 817 if (!oldp) \ 818 *oldlenp = len; \ 819 else { \ 820 if (*oldlenp < len) \ 821 return(ENOMEM); \ 822 *oldlenp = len; \ 823 error = copyout((caddr_t)valp, oldp, len); \ 824 } \ 825 } 826 827 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 828 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 829 830 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 831 if (newp && newlen != len) \ 832 return (EINVAL); 833 834 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 835 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 836 837 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 838 if (error == 0 && newp) \ 839 error = copyin(newp, valp, len); 840 841 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 842 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 843 844 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 845 if (oldlenp) { \ 846 len = strlen(str) + 1; \ 847 if (!oldp) \ 848 *oldlenp = len; \ 849 else { \ 850 if (*oldlenp < len) { \ 851 err2 = ENOMEM; \ 852 len = *oldlenp; \ 853 } else \ 854 *oldlenp = len; \ 855 error = copyout(str, oldp, len);\ 856 if (error == 0) \ 857 error = err2; \ 858 } \ 859 } 860 861 /* 862 * Validate parameters and get old / set new parameters 863 * for an integer-valued sysctl function. 864 */ 865 int 866 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 867 { 868 int error = 0; 869 870 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 871 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 872 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 873 874 return (error); 875 } 876 877 878 /* 879 * As above, but read-only. 880 */ 881 int 882 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 883 { 884 int error = 0; 885 886 if (newp) 887 return (EPERM); 888 889 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 890 891 return (error); 892 } 893 894 /* 895 * Validate parameters and get old / set new parameters 896 * for an quad-valued sysctl function. 897 */ 898 int 899 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 900 quad_t *valp) 901 { 902 int error = 0; 903 904 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 905 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 906 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 907 908 return (error); 909 } 910 911 /* 912 * As above, but read-only. 913 */ 914 int 915 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 916 { 917 int error = 0; 918 919 if (newp) 920 return (EPERM); 921 922 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 923 924 return (error); 925 } 926 927 /* 928 * Validate parameters and get old / set new parameters 929 * for a string-valued sysctl function. 930 */ 931 int 932 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 933 int maxlen) 934 { 935 int len, error = 0, err2 = 0; 936 937 if (newp && newlen >= maxlen) 938 return (EINVAL); 939 940 SYSCTL_STRING_CORE(oldp, oldlenp, str); 941 942 if (error == 0 && newp) { 943 error = copyin(newp, str, newlen); 944 str[newlen] = 0; 945 } 946 return (error); 947 } 948 949 /* 950 * As above, but read-only. 951 */ 952 int 953 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 954 { 955 int len, error = 0, err2 = 0; 956 957 if (newp) 958 return (EPERM); 959 960 SYSCTL_STRING_CORE(oldp, oldlenp, str); 961 962 return (error); 963 } 964 965 /* 966 * Validate parameters and get old / set new parameters 967 * for a structure oriented sysctl function. 968 */ 969 int 970 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 971 int len) 972 { 973 int error = 0; 974 975 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 976 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 977 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 978 979 return (error); 980 } 981 982 /* 983 * Validate parameters and get old parameters 984 * for a structure oriented sysctl function. 985 */ 986 int 987 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 988 int len) 989 { 990 int error = 0; 991 992 if (newp) 993 return (EPERM); 994 995 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 996 997 return (error); 998 } 999 1000 /* 1001 * As above, but can return a truncated result. 1002 */ 1003 int 1004 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1005 int len) 1006 { 1007 int error = 0; 1008 1009 if (newp) 1010 return (EPERM); 1011 1012 len = min(*oldlenp, len); 1013 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1014 1015 return (error); 1016 } 1017 1018 /* 1019 * Get file structures. 1020 */ 1021 static int 1022 sysctl_file(void *vwhere, size_t *sizep) 1023 { 1024 int buflen, error; 1025 struct file *fp; 1026 char *start, *where; 1027 1028 start = where = vwhere; 1029 buflen = *sizep; 1030 if (where == NULL) { 1031 /* 1032 * overestimate by 10 files 1033 */ 1034 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1035 return (0); 1036 } 1037 1038 /* 1039 * first copyout filehead 1040 */ 1041 if (buflen < sizeof(filehead)) { 1042 *sizep = 0; 1043 return (0); 1044 } 1045 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1046 if (error) 1047 return (error); 1048 buflen -= sizeof(filehead); 1049 where += sizeof(filehead); 1050 1051 /* 1052 * followed by an array of file structures 1053 */ 1054 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1055 if (buflen < sizeof(struct file)) { 1056 *sizep = where - start; 1057 return (ENOMEM); 1058 } 1059 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1060 if (error) 1061 return (error); 1062 buflen -= sizeof(struct file); 1063 where += sizeof(struct file); 1064 } 1065 *sizep = where - start; 1066 return (0); 1067 } 1068 1069 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1070 #define FILL_PERM(src, dst) do { \ 1071 (dst)._key = (src)._key; \ 1072 (dst).uid = (src).uid; \ 1073 (dst).gid = (src).gid; \ 1074 (dst).cuid = (src).cuid; \ 1075 (dst).cgid = (src).cgid; \ 1076 (dst).mode = (src).mode; \ 1077 (dst)._seq = (src)._seq; \ 1078 } while (0); 1079 #define FILL_MSG(src, dst) do { \ 1080 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1081 (dst).msg_qnum = (src).msg_qnum; \ 1082 (dst).msg_qbytes = (src).msg_qbytes; \ 1083 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1084 (dst).msg_lspid = (src).msg_lspid; \ 1085 (dst).msg_lrpid = (src).msg_lrpid; \ 1086 (dst).msg_stime = (src).msg_stime; \ 1087 (dst).msg_rtime = (src).msg_rtime; \ 1088 (dst).msg_ctime = (src).msg_ctime; \ 1089 } while (0) 1090 #define FILL_SEM(src, dst) do { \ 1091 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1092 (dst).sem_nsems = (src).sem_nsems; \ 1093 (dst).sem_otime = (src).sem_otime; \ 1094 (dst).sem_ctime = (src).sem_ctime; \ 1095 } while (0) 1096 #define FILL_SHM(src, dst) do { \ 1097 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1098 (dst).shm_segsz = (src).shm_segsz; \ 1099 (dst).shm_lpid = (src).shm_lpid; \ 1100 (dst).shm_cpid = (src).shm_cpid; \ 1101 (dst).shm_atime = (src).shm_atime; \ 1102 (dst).shm_dtime = (src).shm_dtime; \ 1103 (dst).shm_ctime = (src).shm_ctime; \ 1104 (dst).shm_nattch = (src).shm_nattch; \ 1105 } while (0) 1106 1107 static int 1108 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1109 { 1110 #ifdef SYSVMSG 1111 struct msg_sysctl_info *msgsi; 1112 #endif 1113 #ifdef SYSVSEM 1114 struct sem_sysctl_info *semsi; 1115 #endif 1116 #ifdef SYSVSHM 1117 struct shm_sysctl_info *shmsi; 1118 #endif 1119 size_t infosize, dssize, tsize, buflen; 1120 void *buf = NULL, *buf2; 1121 char *start; 1122 int32_t nds; 1123 int i, error, ret; 1124 1125 if (namelen != 1) 1126 return (EINVAL); 1127 1128 start = where; 1129 buflen = *sizep; 1130 1131 switch (*name) { 1132 case KERN_SYSVIPC_MSG_INFO: 1133 #ifdef SYSVMSG 1134 infosize = sizeof(msgsi->msginfo); 1135 nds = msginfo.msgmni; 1136 dssize = sizeof(msgsi->msgids[0]); 1137 break; 1138 #else 1139 return (EINVAL); 1140 #endif 1141 case KERN_SYSVIPC_SEM_INFO: 1142 #ifdef SYSVSEM 1143 infosize = sizeof(semsi->seminfo); 1144 nds = seminfo.semmni; 1145 dssize = sizeof(semsi->semids[0]); 1146 break; 1147 #else 1148 return (EINVAL); 1149 #endif 1150 case KERN_SYSVIPC_SHM_INFO: 1151 #ifdef SYSVSHM 1152 infosize = sizeof(shmsi->shminfo); 1153 nds = shminfo.shmmni; 1154 dssize = sizeof(shmsi->shmids[0]); 1155 break; 1156 #else 1157 return (EINVAL); 1158 #endif 1159 default: 1160 return (EINVAL); 1161 } 1162 /* 1163 * Round infosize to 64 bit boundary if requesting more than just 1164 * the info structure or getting the total data size. 1165 */ 1166 if (where == NULL || *sizep > infosize) 1167 infosize = ((infosize + 7) / 8) * 8; 1168 tsize = infosize + nds * dssize; 1169 1170 /* Return just the total size required. */ 1171 if (where == NULL) { 1172 *sizep = tsize; 1173 return (0); 1174 } 1175 1176 /* Not enough room for even the info struct. */ 1177 if (buflen < infosize) { 1178 *sizep = 0; 1179 return (ENOMEM); 1180 } 1181 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1182 memset(buf, 0, min(tsize, buflen)); 1183 1184 switch (*name) { 1185 #ifdef SYSVMSG 1186 case KERN_SYSVIPC_MSG_INFO: 1187 msgsi = (struct msg_sysctl_info *)buf; 1188 buf2 = &msgsi->msgids[0]; 1189 msgsi->msginfo = msginfo; 1190 break; 1191 #endif 1192 #ifdef SYSVSEM 1193 case KERN_SYSVIPC_SEM_INFO: 1194 semsi = (struct sem_sysctl_info *)buf; 1195 buf2 = &semsi->semids[0]; 1196 semsi->seminfo = seminfo; 1197 break; 1198 #endif 1199 #ifdef SYSVSHM 1200 case KERN_SYSVIPC_SHM_INFO: 1201 shmsi = (struct shm_sysctl_info *)buf; 1202 buf2 = &shmsi->shmids[0]; 1203 shmsi->shminfo = shminfo; 1204 break; 1205 #endif 1206 } 1207 buflen -= infosize; 1208 1209 ret = 0; 1210 if (buflen > 0) { 1211 /* Fill in the IPC data structures. */ 1212 for (i = 0; i < nds; i++) { 1213 if (buflen < dssize) { 1214 ret = ENOMEM; 1215 break; 1216 } 1217 switch (*name) { 1218 #ifdef SYSVMSG 1219 case KERN_SYSVIPC_MSG_INFO: 1220 FILL_MSG(msqids[i], msgsi->msgids[i]); 1221 break; 1222 #endif 1223 #ifdef SYSVSEM 1224 case KERN_SYSVIPC_SEM_INFO: 1225 FILL_SEM(sema[i], semsi->semids[i]); 1226 break; 1227 #endif 1228 #ifdef SYSVSHM 1229 case KERN_SYSVIPC_SHM_INFO: 1230 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1231 break; 1232 #endif 1233 } 1234 buflen -= dssize; 1235 } 1236 } 1237 *sizep -= buflen; 1238 error = copyout(buf, start, *sizep); 1239 /* If copyout succeeded, use return code set earlier. */ 1240 if (error == 0) 1241 error = ret; 1242 if (buf) 1243 free(buf, M_TEMP); 1244 return (error); 1245 } 1246 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1247 1248 static int 1249 sysctl_msgbuf(void *vwhere, size_t *sizep) 1250 { 1251 char *where = vwhere; 1252 size_t len, maxlen = *sizep; 1253 long beg, end; 1254 int error; 1255 1256 /* 1257 * deal with cases where the message buffer has 1258 * become corrupted. 1259 */ 1260 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1261 msgbufenabled = 0; 1262 return (ENXIO); 1263 } 1264 1265 if (where == NULL) { 1266 /* always return full buffer size */ 1267 *sizep = msgbufp->msg_bufs; 1268 return (0); 1269 } 1270 1271 error = 0; 1272 maxlen = min(msgbufp->msg_bufs, maxlen); 1273 1274 /* 1275 * First, copy from the write pointer to the end of 1276 * message buffer. 1277 */ 1278 beg = msgbufp->msg_bufx; 1279 end = msgbufp->msg_bufs; 1280 while (maxlen > 0) { 1281 len = min(end - beg, maxlen); 1282 if (len == 0) 1283 break; 1284 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1285 if (error) 1286 break; 1287 where += len; 1288 maxlen -= len; 1289 1290 /* 1291 * ... then, copy from the beginning of message buffer to 1292 * the write pointer. 1293 */ 1294 beg = 0; 1295 end = msgbufp->msg_bufx; 1296 } 1297 return (error); 1298 } 1299 1300 /* 1301 * try over estimating by 5 procs 1302 */ 1303 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1304 1305 static int 1306 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1307 { 1308 struct eproc eproc; 1309 struct kinfo_proc2 kproc2; 1310 struct kinfo_proc *dp; 1311 struct proc *p; 1312 const struct proclist_desc *pd; 1313 char *where, *dp2; 1314 int type, op, arg, elem_size, elem_count; 1315 int buflen, needed, error; 1316 1317 dp = vwhere; 1318 dp2 = where = vwhere; 1319 buflen = where != NULL ? *sizep : 0; 1320 error = needed = 0; 1321 type = name[0]; 1322 1323 if (type == KERN_PROC) { 1324 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1325 return (EINVAL); 1326 op = name[1]; 1327 if (op != KERN_PROC_ALL) 1328 arg = name[2]; 1329 } else { 1330 if (namelen != 5) 1331 return (EINVAL); 1332 op = name[1]; 1333 arg = name[2]; 1334 elem_size = name[3]; 1335 elem_count = name[4]; 1336 } 1337 1338 proclist_lock_read(); 1339 1340 pd = proclists; 1341 again: 1342 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1343 /* 1344 * Skip embryonic processes. 1345 */ 1346 if (p->p_stat == SIDL) 1347 continue; 1348 /* 1349 * TODO - make more efficient (see notes below). 1350 * do by session. 1351 */ 1352 switch (op) { 1353 1354 case KERN_PROC_PID: 1355 /* could do this with just a lookup */ 1356 if (p->p_pid != (pid_t)arg) 1357 continue; 1358 break; 1359 1360 case KERN_PROC_PGRP: 1361 /* could do this by traversing pgrp */ 1362 if (p->p_pgrp->pg_id != (pid_t)arg) 1363 continue; 1364 break; 1365 1366 case KERN_PROC_SESSION: 1367 if (p->p_session->s_sid != (pid_t)arg) 1368 continue; 1369 break; 1370 1371 case KERN_PROC_TTY: 1372 if (arg == KERN_PROC_TTY_REVOKE) { 1373 if ((p->p_flag & P_CONTROLT) == 0 || 1374 p->p_session->s_ttyp == NULL || 1375 p->p_session->s_ttyvp != NULL) 1376 continue; 1377 } else if ((p->p_flag & P_CONTROLT) == 0 || 1378 p->p_session->s_ttyp == NULL) { 1379 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1380 continue; 1381 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1382 continue; 1383 break; 1384 1385 case KERN_PROC_UID: 1386 if (p->p_ucred->cr_uid != (uid_t)arg) 1387 continue; 1388 break; 1389 1390 case KERN_PROC_RUID: 1391 if (p->p_cred->p_ruid != (uid_t)arg) 1392 continue; 1393 break; 1394 1395 case KERN_PROC_GID: 1396 if (p->p_ucred->cr_gid != (uid_t)arg) 1397 continue; 1398 break; 1399 1400 case KERN_PROC_RGID: 1401 if (p->p_cred->p_rgid != (uid_t)arg) 1402 continue; 1403 break; 1404 1405 case KERN_PROC_ALL: 1406 /* allow everything */ 1407 break; 1408 1409 default: 1410 error = EINVAL; 1411 goto cleanup; 1412 } 1413 if (type == KERN_PROC) { 1414 if (buflen >= sizeof(struct kinfo_proc)) { 1415 fill_eproc(p, &eproc); 1416 error = copyout((caddr_t)p, &dp->kp_proc, 1417 sizeof(struct proc)); 1418 if (error) 1419 goto cleanup; 1420 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1421 sizeof(eproc)); 1422 if (error) 1423 goto cleanup; 1424 dp++; 1425 buflen -= sizeof(struct kinfo_proc); 1426 } 1427 needed += sizeof(struct kinfo_proc); 1428 } else { /* KERN_PROC2 */ 1429 if (buflen >= elem_size && elem_count > 0) { 1430 fill_kproc2(p, &kproc2); 1431 /* 1432 * Copy out elem_size, but not larger than 1433 * the size of a struct kinfo_proc2. 1434 */ 1435 error = copyout(&kproc2, dp2, 1436 min(sizeof(kproc2), elem_size)); 1437 if (error) 1438 goto cleanup; 1439 dp2 += elem_size; 1440 buflen -= elem_size; 1441 elem_count--; 1442 } 1443 needed += elem_size; 1444 } 1445 } 1446 pd++; 1447 if (pd->pd_list != NULL) 1448 goto again; 1449 proclist_unlock_read(); 1450 1451 if (where != NULL) { 1452 if (type == KERN_PROC) 1453 *sizep = (caddr_t)dp - where; 1454 else 1455 *sizep = dp2 - where; 1456 if (needed > *sizep) 1457 return (ENOMEM); 1458 } else { 1459 needed += KERN_PROCSLOP; 1460 *sizep = needed; 1461 } 1462 return (0); 1463 cleanup: 1464 proclist_unlock_read(); 1465 return (error); 1466 } 1467 1468 /* 1469 * Fill in an eproc structure for the specified process. 1470 */ 1471 void 1472 fill_eproc(struct proc *p, struct eproc *ep) 1473 { 1474 struct tty *tp; 1475 1476 ep->e_paddr = p; 1477 ep->e_sess = p->p_session; 1478 ep->e_pcred = *p->p_cred; 1479 ep->e_ucred = *p->p_ucred; 1480 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1481 ep->e_vm.vm_rssize = 0; 1482 ep->e_vm.vm_tsize = 0; 1483 ep->e_vm.vm_dsize = 0; 1484 ep->e_vm.vm_ssize = 0; 1485 /* ep->e_vm.vm_pmap = XXX; */ 1486 } else { 1487 struct vmspace *vm = p->p_vmspace; 1488 1489 ep->e_vm.vm_rssize = vm_resident_count(vm); 1490 ep->e_vm.vm_tsize = vm->vm_tsize; 1491 ep->e_vm.vm_dsize = vm->vm_dsize; 1492 ep->e_vm.vm_ssize = vm->vm_ssize; 1493 } 1494 if (p->p_pptr) 1495 ep->e_ppid = p->p_pptr->p_pid; 1496 else 1497 ep->e_ppid = 0; 1498 ep->e_pgid = p->p_pgrp->pg_id; 1499 ep->e_sid = ep->e_sess->s_sid; 1500 ep->e_jobc = p->p_pgrp->pg_jobc; 1501 if ((p->p_flag & P_CONTROLT) && 1502 (tp = ep->e_sess->s_ttyp)) { 1503 ep->e_tdev = tp->t_dev; 1504 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1505 ep->e_tsess = tp->t_session; 1506 } else 1507 ep->e_tdev = NODEV; 1508 if (p->p_wmesg) 1509 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1510 ep->e_xsize = ep->e_xrssize = 0; 1511 ep->e_xccount = ep->e_xswrss = 0; 1512 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1513 if (SESS_LEADER(p)) 1514 ep->e_flag |= EPROC_SLEADER; 1515 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1516 } 1517 1518 /* 1519 * Fill in an eproc structure for the specified process. 1520 */ 1521 static void 1522 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1523 { 1524 struct tty *tp; 1525 1526 memset(ki, 0, sizeof(*ki)); 1527 1528 ki->p_forw = PTRTOINT64(p->p_forw); 1529 ki->p_back = PTRTOINT64(p->p_back); 1530 ki->p_paddr = PTRTOINT64(p); 1531 1532 ki->p_addr = PTRTOINT64(p->p_addr); 1533 ki->p_fd = PTRTOINT64(p->p_fd); 1534 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1535 ki->p_stats = PTRTOINT64(p->p_stats); 1536 ki->p_limit = PTRTOINT64(p->p_limit); 1537 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1538 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1539 ki->p_sess = PTRTOINT64(p->p_session); 1540 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1541 ki->p_ru = PTRTOINT64(p->p_ru); 1542 1543 ki->p_eflag = 0; 1544 ki->p_exitsig = p->p_exitsig; 1545 ki->p_flag = p->p_flag; 1546 1547 ki->p_pid = p->p_pid; 1548 if (p->p_pptr) 1549 ki->p_ppid = p->p_pptr->p_pid; 1550 else 1551 ki->p_ppid = 0; 1552 ki->p_sid = p->p_session->s_sid; 1553 ki->p__pgid = p->p_pgrp->pg_id; 1554 1555 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1556 1557 ki->p_uid = p->p_ucred->cr_uid; 1558 ki->p_ruid = p->p_cred->p_ruid; 1559 ki->p_gid = p->p_ucred->cr_gid; 1560 ki->p_rgid = p->p_cred->p_rgid; 1561 1562 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1563 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1564 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1565 1566 ki->p_jobc = p->p_pgrp->pg_jobc; 1567 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1568 ki->p_tdev = tp->t_dev; 1569 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1570 ki->p_tsess = PTRTOINT64(tp->t_session); 1571 } else { 1572 ki->p_tdev = NODEV; 1573 } 1574 1575 ki->p_estcpu = p->p_estcpu; 1576 ki->p_rtime_sec = p->p_rtime.tv_sec; 1577 ki->p_rtime_usec = p->p_rtime.tv_usec; 1578 ki->p_cpticks = p->p_cpticks; 1579 ki->p_pctcpu = p->p_pctcpu; 1580 ki->p_swtime = p->p_swtime; 1581 ki->p_slptime = p->p_slptime; 1582 if (p->p_stat == SONPROC) { 1583 KDASSERT(p->p_cpu != NULL); 1584 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1585 } else 1586 ki->p_schedflags = 0; 1587 1588 ki->p_uticks = p->p_uticks; 1589 ki->p_sticks = p->p_sticks; 1590 ki->p_iticks = p->p_iticks; 1591 1592 ki->p_tracep = PTRTOINT64(p->p_tracep); 1593 ki->p_traceflag = p->p_traceflag; 1594 1595 ki->p_holdcnt = p->p_holdcnt; 1596 1597 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1598 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1599 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1600 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1601 1602 ki->p_stat = p->p_stat; 1603 ki->p_priority = p->p_priority; 1604 ki->p_usrpri = p->p_usrpri; 1605 ki->p_nice = p->p_nice; 1606 1607 ki->p_xstat = p->p_xstat; 1608 ki->p_acflag = p->p_acflag; 1609 1610 strncpy(ki->p_comm, p->p_comm, 1611 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1612 1613 if (p->p_wmesg) 1614 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1615 ki->p_wchan = PTRTOINT64(p->p_wchan); 1616 1617 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1618 1619 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1620 ki->p_vm_rssize = 0; 1621 ki->p_vm_tsize = 0; 1622 ki->p_vm_dsize = 0; 1623 ki->p_vm_ssize = 0; 1624 } else { 1625 struct vmspace *vm = p->p_vmspace; 1626 1627 ki->p_vm_rssize = vm_resident_count(vm); 1628 ki->p_vm_tsize = vm->vm_tsize; 1629 ki->p_vm_dsize = vm->vm_dsize; 1630 ki->p_vm_ssize = vm->vm_ssize; 1631 } 1632 1633 if (p->p_session->s_ttyvp) 1634 ki->p_eflag |= EPROC_CTTY; 1635 if (SESS_LEADER(p)) 1636 ki->p_eflag |= EPROC_SLEADER; 1637 1638 /* XXX Is this double check necessary? */ 1639 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1640 ki->p_uvalid = 0; 1641 } else { 1642 ki->p_uvalid = 1; 1643 1644 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1645 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1646 1647 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1648 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1649 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1650 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1651 1652 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1653 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1654 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1655 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1656 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1657 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1658 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1659 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1660 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1661 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1662 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1663 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1664 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1665 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1666 1667 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1668 p->p_stats->p_cru.ru_stime.tv_sec; 1669 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1670 p->p_stats->p_cru.ru_stime.tv_usec; 1671 } 1672 #ifdef MULTIPROCESSOR 1673 if (p->p_cpu != NULL) 1674 ki->p_cpuid = p->p_cpu->ci_cpuid; 1675 else 1676 #endif 1677 ki->p_cpuid = KI_NOCPU; 1678 } 1679 1680 int 1681 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1682 struct proc *up) 1683 { 1684 struct ps_strings pss; 1685 struct proc *p; 1686 size_t len, upper_bound, xlen; 1687 struct uio auio; 1688 struct iovec aiov; 1689 vaddr_t argv; 1690 pid_t pid; 1691 int nargv, type, error, i; 1692 char *arg; 1693 char *tmp; 1694 1695 if (namelen != 2) 1696 return (EINVAL); 1697 pid = name[0]; 1698 type = name[1]; 1699 1700 switch (type) { 1701 case KERN_PROC_ARGV: 1702 case KERN_PROC_NARGV: 1703 case KERN_PROC_ENV: 1704 case KERN_PROC_NENV: 1705 /* ok */ 1706 break; 1707 default: 1708 return (EINVAL); 1709 } 1710 1711 /* check pid */ 1712 if ((p = pfind(pid)) == NULL) 1713 return (EINVAL); 1714 1715 /* only root or same user change look at the environment */ 1716 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1717 if (up->p_ucred->cr_uid != 0) { 1718 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1719 up->p_cred->p_ruid != p->p_cred->p_svuid) 1720 return (EPERM); 1721 } 1722 } 1723 1724 if (sizep != NULL && where == NULL) { 1725 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1726 *sizep = sizeof (int); 1727 else 1728 *sizep = ARG_MAX; /* XXX XXX XXX */ 1729 return (0); 1730 } 1731 if (where == NULL || sizep == NULL) 1732 return (EINVAL); 1733 1734 /* 1735 * Zombies don't have a stack, so we can't read their psstrings. 1736 * System processes also don't have a user stack. 1737 */ 1738 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1739 return (EINVAL); 1740 1741 /* 1742 * Lock the process down in memory. 1743 */ 1744 /* XXXCDC: how should locking work here? */ 1745 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1746 return (EFAULT); 1747 p->p_vmspace->vm_refcnt++; /* XXX */ 1748 1749 /* 1750 * Allocate a temporary buffer to hold the arguments. 1751 */ 1752 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1753 1754 /* 1755 * Read in the ps_strings structure. 1756 */ 1757 aiov.iov_base = &pss; 1758 aiov.iov_len = sizeof(pss); 1759 auio.uio_iov = &aiov; 1760 auio.uio_iovcnt = 1; 1761 auio.uio_offset = (vaddr_t)p->p_psstr; 1762 auio.uio_resid = sizeof(pss); 1763 auio.uio_segflg = UIO_SYSSPACE; 1764 auio.uio_rw = UIO_READ; 1765 auio.uio_procp = NULL; 1766 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1767 if (error) 1768 goto done; 1769 1770 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1771 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1772 else 1773 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1774 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1775 error = copyout(&nargv, where, sizeof(nargv)); 1776 *sizep = sizeof(nargv); 1777 goto done; 1778 } 1779 /* 1780 * Now read the address of the argument vector. 1781 */ 1782 switch (type) { 1783 case KERN_PROC_ARGV: 1784 /* XXX compat32 stuff here */ 1785 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1786 break; 1787 case KERN_PROC_ENV: 1788 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1789 break; 1790 default: 1791 return (EINVAL); 1792 } 1793 auio.uio_offset = (off_t)(long)tmp; 1794 aiov.iov_base = &argv; 1795 aiov.iov_len = sizeof(argv); 1796 auio.uio_iov = &aiov; 1797 auio.uio_iovcnt = 1; 1798 auio.uio_resid = sizeof(argv); 1799 auio.uio_segflg = UIO_SYSSPACE; 1800 auio.uio_rw = UIO_READ; 1801 auio.uio_procp = NULL; 1802 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1803 if (error) 1804 goto done; 1805 1806 /* 1807 * Now copy in the actual argument vector, one page at a time, 1808 * since we don't know how long the vector is (though, we do 1809 * know how many NUL-terminated strings are in the vector). 1810 */ 1811 len = 0; 1812 upper_bound = *sizep; 1813 for (; nargv != 0 && len < upper_bound; len += xlen) { 1814 aiov.iov_base = arg; 1815 aiov.iov_len = PAGE_SIZE; 1816 auio.uio_iov = &aiov; 1817 auio.uio_iovcnt = 1; 1818 auio.uio_offset = argv + len; 1819 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1820 auio.uio_resid = xlen; 1821 auio.uio_segflg = UIO_SYSSPACE; 1822 auio.uio_rw = UIO_READ; 1823 auio.uio_procp = NULL; 1824 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1825 if (error) 1826 goto done; 1827 1828 for (i = 0; i < xlen && nargv != 0; i++) { 1829 if (arg[i] == '\0') 1830 nargv--; /* one full string */ 1831 } 1832 1833 /* make sure we don't copyout past the end of the user's buffer */ 1834 if (len + i > upper_bound) 1835 i = upper_bound - len; 1836 1837 error = copyout(arg, (char *)where + len, i); 1838 if (error) 1839 break; 1840 1841 if (nargv == 0) { 1842 len += i; 1843 break; 1844 } 1845 } 1846 *sizep = len; 1847 1848 done: 1849 uvmspace_free(p->p_vmspace); 1850 1851 free(arg, M_TEMP); 1852 return (error); 1853 } 1854 1855 #if NPTY > 0 1856 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1857 1858 /* 1859 * Validate parameters and get old / set new parameters 1860 * for pty sysctl function. 1861 */ 1862 static int 1863 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 1864 { 1865 int error = 0; 1866 int oldmax = 0, newmax = 0; 1867 1868 /* get current value of maxptys */ 1869 oldmax = pty_maxptys(0, 0); 1870 1871 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1872 1873 if (!error && newp) { 1874 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1875 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1876 1877 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1878 return (EINVAL); 1879 1880 } 1881 1882 return (error); 1883 } 1884 #endif /* NPTY > 0 */ 1885
Indexes created Sun Sep 21 20:09:37 GMT 2025