kern_sysctl.c revision 1.86.2.26
1 /* $NetBSD: kern_sysctl.c,v 1.86.2.26 2002/12/11 15:44:48 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95 39 */ 40 41 /* 42 * sysctl system call. 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: kern_sysctl.c,v 1.86.2.26 2002/12/11 15:44:48 thorpej Exp $"); 47 48 #include "opt_ddb.h" 49 #include "opt_insecure.h" 50 #include "opt_defcorename.h" 51 #include "opt_pipe.h" 52 #include "opt_sysv.h" 53 #include "pty.h" 54 #include "rnd.h" 55 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/kernel.h> 59 #include <sys/buf.h> 60 #include <sys/device.h> 61 #include <sys/disklabel.h> 62 #include <sys/dkstat.h> 63 #include <sys/exec.h> 64 #include <sys/file.h> 65 #include <sys/ioctl.h> 66 #include <sys/malloc.h> 67 #include <sys/mount.h> 68 #include <sys/msgbuf.h> 69 #include <sys/pool.h> 70 #include <sys/proc.h> 71 #include <sys/resource.h> 72 #include <sys/resourcevar.h> 73 #include <sys/sa.h> 74 #include <sys/syscallargs.h> 75 #include <sys/tty.h> 76 #include <sys/unistd.h> 77 #include <sys/vnode.h> 78 #include <sys/socketvar.h> 79 #define __SYSCTL_PRIVATE 80 #include <sys/sysctl.h> 81 #include <sys/lock.h> 82 #include <sys/namei.h> 83 84 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 85 #include <sys/ipc.h> 86 #endif 87 #ifdef SYSVMSG 88 #include <sys/msg.h> 89 #endif 90 #ifdef SYSVSEM 91 #include <sys/sem.h> 92 #endif 93 #ifdef SYSVSHM 94 #include <sys/shm.h> 95 #endif 96 97 #include <dev/cons.h> 98 99 #if defined(DDB) 100 #include <ddb/ddbvar.h> 101 #endif 102 103 #ifndef PIPE_SOCKETPAIR 104 #include <sys/pipe.h> 105 #endif 106 107 #if NRND > 0 108 #include <sys/rnd.h> 109 #endif 110 111 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 112 113 static int sysctl_file(void *, size_t *); 114 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 115 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 116 #endif 117 static int sysctl_msgbuf(void *, size_t *); 118 static int sysctl_doeproc(int *, u_int, void *, size_t *); 119 static int sysctl_dolwp(int *, u_int, void *, size_t *); 120 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 121 #ifdef MULTIPROCESSOR 122 static int sysctl_docptime(void *, size_t *, void *); 123 static int sysctl_ncpus(void); 124 #endif 125 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 126 static void fill_lwp(struct lwp *, struct kinfo_lwp *); 127 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 128 #if NPTY > 0 129 static int sysctl_pty(void *, size_t *, void *, size_t); 130 #endif 131 132 /* 133 * The `sysctl_memlock' is intended to keep too many processes from 134 * locking down memory by doing sysctls at once. Whether or not this 135 * is really a good idea to worry about it probably a subject of some 136 * debate. 137 */ 138 struct lock sysctl_memlock; 139 140 void 141 sysctl_init(void) 142 { 143 144 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 145 } 146 147 int 148 sys___sysctl(struct lwp *l, void *v, register_t *retval) 149 { 150 struct sys___sysctl_args /* { 151 syscallarg(int *) name; 152 syscallarg(u_int) namelen; 153 syscallarg(void *) old; 154 syscallarg(size_t *) oldlenp; 155 syscallarg(void *) new; 156 syscallarg(size_t) newlen; 157 } */ *uap = v; 158 struct proc *p = l->l_proc; 159 int error; 160 size_t savelen = 0, oldlen = 0; 161 sysctlfn *fn; 162 int name[CTL_MAXNAME]; 163 size_t *oldlenp; 164 165 /* 166 * all top-level sysctl names are non-terminal 167 */ 168 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 169 return (EINVAL); 170 error = copyin(SCARG(uap, name), &name, 171 SCARG(uap, namelen) * sizeof(int)); 172 if (error) 173 return (error); 174 175 /* 176 * For all but CTL_PROC, must be root to change a value. 177 * For CTL_PROC, must be root, or owner of the proc (and not suid), 178 * this is checked in proc_sysctl() (once we know the targer proc). 179 */ 180 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 181 (error = suser(p->p_ucred, &p->p_acflag))) 182 return error; 183 184 switch (name[0]) { 185 case CTL_KERN: 186 fn = kern_sysctl; 187 break; 188 case CTL_HW: 189 fn = hw_sysctl; 190 break; 191 case CTL_VM: 192 fn = uvm_sysctl; 193 break; 194 case CTL_NET: 195 fn = net_sysctl; 196 break; 197 case CTL_VFS: 198 fn = vfs_sysctl; 199 break; 200 case CTL_MACHDEP: 201 fn = cpu_sysctl; 202 break; 203 #ifdef DEBUG 204 case CTL_DEBUG: 205 fn = debug_sysctl; 206 break; 207 #endif 208 #ifdef DDB 209 case CTL_DDB: 210 fn = ddb_sysctl; 211 break; 212 #endif 213 case CTL_PROC: 214 fn = proc_sysctl; 215 break; 216 217 case CTL_EMUL: 218 fn = emul_sysctl; 219 break; 220 default: 221 return (EOPNOTSUPP); 222 } 223 224 /* 225 * XXX Hey, we wire `old', but what about `new'? 226 */ 227 228 oldlenp = SCARG(uap, oldlenp); 229 if (oldlenp) { 230 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 231 return (error); 232 oldlenp = &oldlen; 233 } 234 if (SCARG(uap, old) != NULL) { 235 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 236 if (error) 237 return (error); 238 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 239 if (error) { 240 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 241 return error; 242 } 243 savelen = oldlen; 244 } 245 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 246 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 247 if (SCARG(uap, old) != NULL) { 248 uvm_vsunlock(p, SCARG(uap, old), savelen); 249 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 250 } 251 if (error) 252 return (error); 253 if (SCARG(uap, oldlenp)) 254 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 255 return (error); 256 } 257 258 /* 259 * Attributes stored in the kernel. 260 */ 261 char hostname[MAXHOSTNAMELEN]; 262 int hostnamelen; 263 264 char domainname[MAXHOSTNAMELEN]; 265 int domainnamelen; 266 267 long hostid; 268 269 #ifdef INSECURE 270 int securelevel = -1; 271 #else 272 int securelevel = 0; 273 #endif 274 275 #ifndef DEFCORENAME 276 #define DEFCORENAME "%n.core" 277 #endif 278 char defcorename[MAXPATHLEN] = DEFCORENAME; 279 int defcorenamelen = sizeof(DEFCORENAME); 280 281 extern int kern_logsigexit; 282 extern fixpt_t ccpu; 283 284 #ifndef MULTIPROCESSOR 285 #define sysctl_ncpus() 1 286 #endif 287 288 #ifdef MULTIPROCESSOR 289 290 #ifndef CPU_INFO_FOREACH 291 #define CPU_INFO_ITERATOR int 292 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 293 #endif 294 295 static int 296 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 297 { 298 u_int64_t cp_time[CPUSTATES]; 299 int i; 300 struct cpu_info *ci; 301 CPU_INFO_ITERATOR cii; 302 303 for (i = 0; i < CPUSTATES; i++) 304 cp_time[i] = 0; 305 306 for (CPU_INFO_FOREACH(cii, ci)) { 307 for (i = 0; i < CPUSTATES; i++) 308 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 309 } 310 return (sysctl_rdstruct(oldp, oldlenp, newp, 311 cp_time, sizeof(cp_time))); 312 } 313 314 static int 315 sysctl_ncpus(void) 316 { 317 struct cpu_info *ci; 318 CPU_INFO_ITERATOR cii; 319 320 int ncpus = 0; 321 for (CPU_INFO_FOREACH(cii, ci)) 322 ncpus++; 323 return ncpus; 324 } 325 326 #endif 327 328 /* 329 * kernel related system variables. 330 */ 331 int 332 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 333 void *newp, size_t newlen, struct proc *p) 334 { 335 int error, level, inthostid; 336 int old_autonicetime; 337 int old_vnodes; 338 dev_t consdev; 339 #if NRND > 0 340 int v; 341 #endif 342 343 /* All sysctl names at this level, except for a few, are terminal. */ 344 switch (name[0]) { 345 case KERN_PROC: 346 case KERN_PROC2: 347 case KERN_LWP: 348 case KERN_PROF: 349 case KERN_MBUF: 350 case KERN_PROC_ARGS: 351 case KERN_SYSVIPC_INFO: 352 case KERN_PIPE: 353 case KERN_TKSTAT: 354 /* Not terminal. */ 355 break; 356 default: 357 if (namelen != 1) 358 return (ENOTDIR); /* overloaded */ 359 } 360 361 switch (name[0]) { 362 case KERN_OSTYPE: 363 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 364 case KERN_OSRELEASE: 365 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 366 case KERN_OSREV: 367 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 368 case KERN_VERSION: 369 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 370 case KERN_MAXVNODES: 371 old_vnodes = desiredvnodes; 372 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 373 if (newp && !error) { 374 if (old_vnodes > desiredvnodes) { 375 desiredvnodes = old_vnodes; 376 return (EINVAL); 377 } 378 vfs_reinit(); 379 nchreinit(); 380 } 381 return (error); 382 case KERN_MAXPROC: 383 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 384 case KERN_MAXFILES: 385 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 386 case KERN_ARGMAX: 387 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 388 case KERN_SECURELVL: 389 level = securelevel; 390 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 391 newp == NULL) 392 return (error); 393 if (level < securelevel && p->p_pid != 1) 394 return (EPERM); 395 securelevel = level; 396 return (0); 397 case KERN_HOSTNAME: 398 error = sysctl_string(oldp, oldlenp, newp, newlen, 399 hostname, sizeof(hostname)); 400 if (newp && !error) 401 hostnamelen = newlen; 402 return (error); 403 case KERN_DOMAINNAME: 404 error = sysctl_string(oldp, oldlenp, newp, newlen, 405 domainname, sizeof(domainname)); 406 if (newp && !error) 407 domainnamelen = newlen; 408 return (error); 409 case KERN_HOSTID: 410 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 411 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 412 if (newp && !error) 413 hostid = inthostid; 414 return (error); 415 case KERN_CLOCKRATE: 416 return (sysctl_clockrate(oldp, oldlenp)); 417 case KERN_BOOTTIME: 418 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 419 sizeof(struct timeval))); 420 case KERN_VNODE: 421 return (sysctl_vnode(oldp, oldlenp, p)); 422 case KERN_PROC: 423 case KERN_PROC2: 424 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 425 case KERN_LWP: 426 return (sysctl_dolwp(name, namelen, oldp, oldlenp)); 427 case KERN_PROC_ARGS: 428 return (sysctl_procargs(name + 1, namelen - 1, 429 oldp, oldlenp, p)); 430 case KERN_FILE: 431 return (sysctl_file(oldp, oldlenp)); 432 #ifdef GPROF 433 case KERN_PROF: 434 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 435 newp, newlen)); 436 #endif 437 case KERN_POSIX1: 438 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 439 case KERN_NGROUPS: 440 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 441 case KERN_JOB_CONTROL: 442 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 443 case KERN_SAVED_IDS: 444 #ifdef _POSIX_SAVED_IDS 445 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 446 #else 447 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 448 #endif 449 case KERN_MAXPARTITIONS: 450 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 451 case KERN_RAWPARTITION: 452 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 453 #ifdef NTP 454 case KERN_NTPTIME: 455 return (sysctl_ntptime(oldp, oldlenp)); 456 #endif 457 case KERN_AUTONICETIME: 458 old_autonicetime = autonicetime; 459 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 460 if (autonicetime < 0) 461 autonicetime = old_autonicetime; 462 return (error); 463 case KERN_AUTONICEVAL: 464 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 465 if (autoniceval < PRIO_MIN) 466 autoniceval = PRIO_MIN; 467 if (autoniceval > PRIO_MAX) 468 autoniceval = PRIO_MAX; 469 return (error); 470 case KERN_RTC_OFFSET: 471 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 472 case KERN_ROOT_DEVICE: 473 return (sysctl_rdstring(oldp, oldlenp, newp, 474 root_device->dv_xname)); 475 case KERN_MSGBUFSIZE: 476 /* 477 * deal with cases where the message buffer has 478 * become corrupted. 479 */ 480 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 481 msgbufenabled = 0; 482 return (ENXIO); 483 } 484 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 485 case KERN_FSYNC: 486 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 487 case KERN_SYSVMSG: 488 #ifdef SYSVMSG 489 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 490 #else 491 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 492 #endif 493 case KERN_SYSVSEM: 494 #ifdef SYSVSEM 495 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 496 #else 497 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 498 #endif 499 case KERN_SYSVSHM: 500 #ifdef SYSVSHM 501 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 502 #else 503 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 504 #endif 505 case KERN_DEFCORENAME: 506 if (newp && newlen < 1) 507 return (EINVAL); 508 error = sysctl_string(oldp, oldlenp, newp, newlen, 509 defcorename, sizeof(defcorename)); 510 if (newp && !error) 511 defcorenamelen = newlen; 512 return (error); 513 case KERN_SYNCHRONIZED_IO: 514 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 515 case KERN_IOV_MAX: 516 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 517 case KERN_MBUF: 518 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 519 newp, newlen)); 520 case KERN_MAPPED_FILES: 521 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 522 case KERN_MEMLOCK: 523 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 524 case KERN_MEMLOCK_RANGE: 525 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 526 case KERN_MEMORY_PROTECTION: 527 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 528 case KERN_LOGIN_NAME_MAX: 529 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 530 case KERN_LOGSIGEXIT: 531 return (sysctl_int(oldp, oldlenp, newp, newlen, 532 &kern_logsigexit)); 533 case KERN_FSCALE: 534 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 535 case KERN_CCPU: 536 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 537 case KERN_CP_TIME: 538 #ifndef MULTIPROCESSOR 539 return (sysctl_rdstruct(oldp, oldlenp, newp, 540 curcpu()->ci_schedstate.spc_cp_time, 541 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 542 #else 543 return (sysctl_docptime(oldp, oldlenp, newp)); 544 #endif 545 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 546 case KERN_SYSVIPC_INFO: 547 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 548 #endif 549 case KERN_MSGBUF: 550 return (sysctl_msgbuf(oldp, oldlenp)); 551 case KERN_CONSDEV: 552 if (cn_tab != NULL) 553 consdev = cn_tab->cn_dev; 554 else 555 consdev = NODEV; 556 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 557 sizeof consdev)); 558 #if NPTY > 0 559 case KERN_MAXPTYS: 560 return sysctl_pty(oldp, oldlenp, newp, newlen); 561 #endif 562 #ifndef PIPE_SOCKETPAIR 563 case KERN_PIPE: 564 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 565 newp, newlen)); 566 #endif 567 case KERN_MAXPHYS: 568 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 569 case KERN_SBMAX: 570 { 571 int new_sbmax = sb_max; 572 573 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 574 if (newp && !error) { 575 if (new_sbmax < (16 * 1024)) /* sanity */ 576 return (EINVAL); 577 sb_max = new_sbmax; 578 } 579 return (error); 580 } 581 case KERN_TKSTAT: 582 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 583 newp)); 584 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 585 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 586 case KERN_URND: 587 #if NRND > 0 588 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 589 sizeof(v)) 590 return (sysctl_rdint(oldp, oldlenp, newp, v)); 591 else 592 return (EIO); /*XXX*/ 593 #else 594 return (EOPNOTSUPP); 595 #endif 596 case KERN_LABELSECTOR: 597 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 598 case KERN_LABELOFFSET: 599 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 600 default: 601 return (EOPNOTSUPP); 602 } 603 /* NOTREACHED */ 604 } 605 606 /* 607 * hardware related system variables. 608 */ 609 int 610 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 611 void *newp, size_t newlen, struct proc *p) 612 { 613 614 /* All sysctl names at this level, except for a few, are terminal. */ 615 switch (name[0]) { 616 case HW_DISKSTATS: 617 /* Not terminal. */ 618 break; 619 default: 620 if (namelen != 1) 621 return (ENOTDIR); /* overloaded */ 622 } 623 624 switch (name[0]) { 625 case HW_MACHINE: 626 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 627 case HW_MACHINE_ARCH: 628 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 629 case HW_MODEL: 630 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 631 case HW_NCPU: 632 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 633 case HW_BYTEORDER: 634 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 635 case HW_PHYSMEM: 636 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 637 case HW_USERMEM: 638 return (sysctl_rdint(oldp, oldlenp, newp, 639 ctob(physmem - uvmexp.wired))); 640 case HW_PAGESIZE: 641 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 642 case HW_ALIGNBYTES: 643 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 644 case HW_DISKNAMES: 645 return (sysctl_disknames(oldp, oldlenp)); 646 case HW_DISKSTATS: 647 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 648 case HW_CNMAGIC: { 649 char magic[CNS_LEN]; 650 int error; 651 652 if (oldp) 653 cn_get_magic(magic, CNS_LEN); 654 error = sysctl_string(oldp, oldlenp, newp, newlen, 655 magic, sizeof(magic)); 656 if (newp && !error) { 657 error = cn_set_magic(magic); 658 } 659 return (error); 660 } 661 default: 662 return (EOPNOTSUPP); 663 } 664 /* NOTREACHED */ 665 } 666 667 #ifdef DEBUG 668 /* 669 * Debugging related system variables. 670 */ 671 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 672 struct ctldebug debug5, debug6, debug7, debug8, debug9; 673 struct ctldebug debug10, debug11, debug12, debug13, debug14; 674 struct ctldebug debug15, debug16, debug17, debug18, debug19; 675 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 676 &debug0, &debug1, &debug2, &debug3, &debug4, 677 &debug5, &debug6, &debug7, &debug8, &debug9, 678 &debug10, &debug11, &debug12, &debug13, &debug14, 679 &debug15, &debug16, &debug17, &debug18, &debug19, 680 }; 681 682 int 683 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 684 void *newp, size_t newlen, struct proc *p) 685 { 686 struct ctldebug *cdp; 687 688 /* all sysctl names at this level are name and field */ 689 if (namelen != 2) 690 return (ENOTDIR); /* overloaded */ 691 if (name[0] >= CTL_DEBUG_MAXID) 692 return (EOPNOTSUPP); 693 cdp = debugvars[name[0]]; 694 if (cdp->debugname == 0) 695 return (EOPNOTSUPP); 696 switch (name[1]) { 697 case CTL_DEBUG_NAME: 698 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 699 case CTL_DEBUG_VALUE: 700 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 701 default: 702 return (EOPNOTSUPP); 703 } 704 /* NOTREACHED */ 705 } 706 #endif /* DEBUG */ 707 708 int 709 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 710 void *newp, size_t newlen, struct proc *p) 711 { 712 struct proc *ptmp = NULL; 713 const struct proclist_desc *pd; 714 int error = 0; 715 struct rlimit alim; 716 struct plimit *newplim; 717 char *tmps = NULL; 718 size_t len, curlen; 719 u_int i; 720 721 if (namelen < 2) 722 return EINVAL; 723 724 if (name[0] == PROC_CURPROC) { 725 ptmp = p; 726 } else { 727 proclist_lock_read(); 728 for (pd = proclists; pd->pd_list != NULL; pd++) { 729 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 730 ptmp = LIST_NEXT(ptmp, p_list)) { 731 /* Skip embryonic processes. */ 732 if (ptmp->p_stat == SIDL) 733 continue; 734 if (ptmp->p_pid == (pid_t)name[0]) 735 break; 736 } 737 if (ptmp != NULL) 738 break; 739 } 740 proclist_unlock_read(); 741 if (ptmp == NULL) 742 return(ESRCH); 743 if (p->p_ucred->cr_uid != 0) { 744 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 745 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 746 return EPERM; 747 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 748 return EPERM; /* sgid proc */ 749 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 750 if (p->p_ucred->cr_groups[i] == 751 ptmp->p_cred->p_rgid) 752 break; 753 } 754 if (i == p->p_ucred->cr_ngroups) 755 return EPERM; 756 } 757 } 758 switch(name[1]) { 759 case PROC_PID_STOPFORK: 760 if (namelen != 2) 761 return EINVAL; 762 i = ((ptmp->p_flag & P_STOPFORK) != 0); 763 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 764 return error; 765 if (i != 0) 766 ptmp->p_flag |= P_STOPFORK; 767 else 768 ptmp->p_flag &= ~P_STOPFORK; 769 return 0; 770 break; 771 772 case PROC_PID_STOPEXEC: 773 if (namelen != 2) 774 return EINVAL; 775 i = ((ptmp->p_flag & P_STOPEXEC) != 0); 776 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &i)) != 0) 777 return error; 778 if (i != 0) 779 ptmp->p_flag |= P_STOPEXEC; 780 else 781 ptmp->p_flag &= ~P_STOPEXEC; 782 return 0; 783 break; 784 785 case PROC_PID_CORENAME: 786 if (namelen != 2) 787 return EINVAL; 788 /* 789 * Can't use sysctl_string() here because we may malloc a new 790 * area during the process, so we have to do it by hand. 791 */ 792 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 793 if (oldlenp && *oldlenp < curlen) { 794 if (!oldp) 795 *oldlenp = curlen; 796 return (ENOMEM); 797 } 798 if (newp) { 799 if (securelevel > 2) 800 return EPERM; 801 if (newlen > MAXPATHLEN) 802 return ENAMETOOLONG; 803 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 804 if (tmps == NULL) 805 return ENOMEM; 806 error = copyin(newp, tmps, newlen + 1); 807 tmps[newlen] = '\0'; 808 if (error) 809 goto cleanup; 810 /* Enforce to be either 'core' for end with '.core' */ 811 if (newlen < 4) { /* c.o.r.e */ 812 error = EINVAL; 813 goto cleanup; 814 } 815 len = newlen - 4; 816 if (len > 0) { 817 if (tmps[len - 1] != '.' && 818 tmps[len - 1] != '/') { 819 error = EINVAL; 820 goto cleanup; 821 } 822 } 823 if (strcmp(&tmps[len], "core") != 0) { 824 error = EINVAL; 825 goto cleanup; 826 } 827 } 828 if (oldp && oldlenp) { 829 *oldlenp = curlen; 830 error = copyout(ptmp->p_limit->pl_corename, oldp, 831 curlen); 832 } 833 if (newp && error == 0) { 834 /* if the 2 strings are identical, don't limcopy() */ 835 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 836 error = 0; 837 goto cleanup; 838 } 839 if (ptmp->p_limit->p_refcnt > 1 && 840 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 841 newplim = limcopy(ptmp->p_limit); 842 limfree(ptmp->p_limit); 843 ptmp->p_limit = newplim; 844 } 845 if (ptmp->p_limit->pl_corename != defcorename) { 846 free(ptmp->p_limit->pl_corename, M_TEMP); 847 } 848 ptmp->p_limit->pl_corename = tmps; 849 return (0); 850 } 851 cleanup: 852 if (tmps) 853 free(tmps, M_TEMP); 854 return (error); 855 break; 856 857 case PROC_PID_LIMIT: 858 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 859 return EINVAL; 860 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 861 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 862 error = sysctl_quad(oldp, oldlenp, newp, newlen, 863 &alim.rlim_max); 864 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 865 error = sysctl_quad(oldp, oldlenp, newp, newlen, 866 &alim.rlim_cur); 867 else 868 error = EINVAL; 869 870 if (error) 871 return error; 872 873 if (newp) 874 error = dosetrlimit(ptmp, p->p_cred, 875 name[2] - 1, &alim); 876 return error; 877 break; 878 879 default: 880 return (EINVAL); 881 break; 882 } 883 /* NOTREACHED */ 884 return (EINVAL); 885 } 886 887 int 888 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 889 void *newp, size_t newlen, struct proc *p) 890 { 891 static struct { 892 const char *name; 893 int type; 894 } emulations[] = CTL_EMUL_NAMES; 895 const struct emul *e; 896 const char *ename; 897 #ifdef LKM 898 extern struct lock exec_lock; /* XXX */ 899 int error; 900 #else 901 extern int nexecs_builtin; 902 extern const struct execsw execsw_builtin[]; 903 int i; 904 #endif 905 906 /* all sysctl names at this level are name and field */ 907 if (namelen < 2) 908 return (ENOTDIR); /* overloaded */ 909 910 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 911 return (EOPNOTSUPP); 912 913 ename = emulations[name[0]].name; 914 915 #ifdef LKM 916 lockmgr(&exec_lock, LK_SHARED, NULL); 917 if ((e = emul_search(ename))) { 918 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 919 newp, newlen, p); 920 } else 921 error = EOPNOTSUPP; 922 lockmgr(&exec_lock, LK_RELEASE, NULL); 923 924 return (error); 925 #else 926 for (i = 0; i < nexecs_builtin; i++) { 927 e = execsw_builtin[i].es_emul; 928 /* 929 * In order to match e.g. e->e_name "irix o32" with ename "irix", 930 * we limit the comparison to the length of ename. 931 */ 932 if (e == NULL || strncmp(ename, e->e_name, strlen(ename)) != 0 || 933 e->e_sysctl == NULL) 934 continue; 935 936 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 937 newp, newlen, p); 938 } 939 940 return (EOPNOTSUPP); 941 #endif 942 } 943 /* 944 * Convenience macros. 945 */ 946 947 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 948 if (oldlenp) { \ 949 if (!oldp) \ 950 *oldlenp = len; \ 951 else { \ 952 if (*oldlenp < len) \ 953 return(ENOMEM); \ 954 *oldlenp = len; \ 955 error = copyout((caddr_t)valp, oldp, len); \ 956 } \ 957 } 958 959 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 960 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 961 962 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 963 if (newp && newlen != len) \ 964 return (EINVAL); 965 966 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 967 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 968 969 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 970 if (error == 0 && newp) \ 971 error = copyin(newp, valp, len); 972 973 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 974 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 975 976 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 977 if (oldlenp) { \ 978 len = strlen(str) + 1; \ 979 if (!oldp) \ 980 *oldlenp = len; \ 981 else { \ 982 if (*oldlenp < len) { \ 983 err2 = ENOMEM; \ 984 len = *oldlenp; \ 985 } else \ 986 *oldlenp = len; \ 987 error = copyout(str, oldp, len);\ 988 if (error == 0) \ 989 error = err2; \ 990 } \ 991 } 992 993 /* 994 * Validate parameters and get old / set new parameters 995 * for an integer-valued sysctl function. 996 */ 997 int 998 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 999 { 1000 int error = 0; 1001 1002 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1003 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1004 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1005 1006 return (error); 1007 } 1008 1009 1010 /* 1011 * As above, but read-only. 1012 */ 1013 int 1014 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1015 { 1016 int error = 0; 1017 1018 if (newp) 1019 return (EPERM); 1020 1021 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1022 1023 return (error); 1024 } 1025 1026 /* 1027 * Validate parameters and get old / set new parameters 1028 * for an quad-valued sysctl function. 1029 */ 1030 int 1031 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1032 quad_t *valp) 1033 { 1034 int error = 0; 1035 1036 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1037 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1038 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1039 1040 return (error); 1041 } 1042 1043 /* 1044 * As above, but read-only. 1045 */ 1046 int 1047 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1048 { 1049 int error = 0; 1050 1051 if (newp) 1052 return (EPERM); 1053 1054 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1055 1056 return (error); 1057 } 1058 1059 /* 1060 * Validate parameters and get old / set new parameters 1061 * for a string-valued sysctl function. 1062 */ 1063 int 1064 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1065 size_t maxlen) 1066 { 1067 int error = 0, err2 = 0; 1068 size_t len; 1069 1070 if (newp && newlen >= maxlen) 1071 return (EINVAL); 1072 1073 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1074 1075 if (error == 0 && newp) { 1076 error = copyin(newp, str, newlen); 1077 str[newlen] = 0; 1078 } 1079 return (error); 1080 } 1081 1082 /* 1083 * As above, but read-only. 1084 */ 1085 int 1086 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1087 { 1088 int error = 0, err2 = 0; 1089 size_t len; 1090 1091 if (newp) 1092 return (EPERM); 1093 1094 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1095 1096 return (error); 1097 } 1098 1099 /* 1100 * Validate parameters and get old / set new parameters 1101 * for a structure oriented sysctl function. 1102 */ 1103 int 1104 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1105 size_t len) 1106 { 1107 int error = 0; 1108 1109 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1110 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1111 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1112 1113 return (error); 1114 } 1115 1116 /* 1117 * Validate parameters and get old parameters 1118 * for a structure oriented sysctl function. 1119 */ 1120 int 1121 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1122 size_t len) 1123 { 1124 int error = 0; 1125 1126 if (newp) 1127 return (EPERM); 1128 1129 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1130 1131 return (error); 1132 } 1133 1134 /* 1135 * As above, but can return a truncated result. 1136 */ 1137 int 1138 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1139 size_t len) 1140 { 1141 int error = 0; 1142 1143 if (newp) 1144 return (EPERM); 1145 1146 len = min(*oldlenp, len); 1147 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1148 1149 return (error); 1150 } 1151 1152 /* 1153 * Get file structures. 1154 */ 1155 static int 1156 sysctl_file(void *vwhere, size_t *sizep) 1157 { 1158 int error; 1159 size_t buflen; 1160 struct file *fp; 1161 char *start, *where; 1162 1163 start = where = vwhere; 1164 buflen = *sizep; 1165 if (where == NULL) { 1166 /* 1167 * overestimate by 10 files 1168 */ 1169 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1170 return (0); 1171 } 1172 1173 /* 1174 * first copyout filehead 1175 */ 1176 if (buflen < sizeof(filehead)) { 1177 *sizep = 0; 1178 return (0); 1179 } 1180 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1181 if (error) 1182 return (error); 1183 buflen -= sizeof(filehead); 1184 where += sizeof(filehead); 1185 1186 /* 1187 * followed by an array of file structures 1188 */ 1189 LIST_FOREACH(fp, &filehead, f_list) { 1190 if (buflen < sizeof(struct file)) { 1191 *sizep = where - start; 1192 return (ENOMEM); 1193 } 1194 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1195 if (error) 1196 return (error); 1197 buflen -= sizeof(struct file); 1198 where += sizeof(struct file); 1199 } 1200 *sizep = where - start; 1201 return (0); 1202 } 1203 1204 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1205 #define FILL_PERM(src, dst) do { \ 1206 (dst)._key = (src)._key; \ 1207 (dst).uid = (src).uid; \ 1208 (dst).gid = (src).gid; \ 1209 (dst).cuid = (src).cuid; \ 1210 (dst).cgid = (src).cgid; \ 1211 (dst).mode = (src).mode; \ 1212 (dst)._seq = (src)._seq; \ 1213 } while (/*CONSTCOND*/ 0); 1214 #define FILL_MSG(src, dst) do { \ 1215 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1216 (dst).msg_qnum = (src).msg_qnum; \ 1217 (dst).msg_qbytes = (src).msg_qbytes; \ 1218 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1219 (dst).msg_lspid = (src).msg_lspid; \ 1220 (dst).msg_lrpid = (src).msg_lrpid; \ 1221 (dst).msg_stime = (src).msg_stime; \ 1222 (dst).msg_rtime = (src).msg_rtime; \ 1223 (dst).msg_ctime = (src).msg_ctime; \ 1224 } while (/*CONSTCOND*/ 0) 1225 #define FILL_SEM(src, dst) do { \ 1226 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1227 (dst).sem_nsems = (src).sem_nsems; \ 1228 (dst).sem_otime = (src).sem_otime; \ 1229 (dst).sem_ctime = (src).sem_ctime; \ 1230 } while (/*CONSTCOND*/ 0) 1231 #define FILL_SHM(src, dst) do { \ 1232 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1233 (dst).shm_segsz = (src).shm_segsz; \ 1234 (dst).shm_lpid = (src).shm_lpid; \ 1235 (dst).shm_cpid = (src).shm_cpid; \ 1236 (dst).shm_atime = (src).shm_atime; \ 1237 (dst).shm_dtime = (src).shm_dtime; \ 1238 (dst).shm_ctime = (src).shm_ctime; \ 1239 (dst).shm_nattch = (src).shm_nattch; \ 1240 } while (/*CONSTCOND*/ 0) 1241 1242 static int 1243 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1244 { 1245 #ifdef SYSVMSG 1246 struct msg_sysctl_info *msgsi = NULL; 1247 #endif 1248 #ifdef SYSVSEM 1249 struct sem_sysctl_info *semsi = NULL; 1250 #endif 1251 #ifdef SYSVSHM 1252 struct shm_sysctl_info *shmsi = NULL; 1253 #endif 1254 size_t infosize, dssize, tsize, buflen; 1255 void *buf = NULL; 1256 char *start; 1257 int32_t nds; 1258 int i, error, ret; 1259 1260 if (namelen != 1) 1261 return (EINVAL); 1262 1263 start = where; 1264 buflen = *sizep; 1265 1266 switch (*name) { 1267 case KERN_SYSVIPC_MSG_INFO: 1268 #ifdef SYSVMSG 1269 infosize = sizeof(msgsi->msginfo); 1270 nds = msginfo.msgmni; 1271 dssize = sizeof(msgsi->msgids[0]); 1272 break; 1273 #else 1274 return (EINVAL); 1275 #endif 1276 case KERN_SYSVIPC_SEM_INFO: 1277 #ifdef SYSVSEM 1278 infosize = sizeof(semsi->seminfo); 1279 nds = seminfo.semmni; 1280 dssize = sizeof(semsi->semids[0]); 1281 break; 1282 #else 1283 return (EINVAL); 1284 #endif 1285 case KERN_SYSVIPC_SHM_INFO: 1286 #ifdef SYSVSHM 1287 infosize = sizeof(shmsi->shminfo); 1288 nds = shminfo.shmmni; 1289 dssize = sizeof(shmsi->shmids[0]); 1290 break; 1291 #else 1292 return (EINVAL); 1293 #endif 1294 default: 1295 return (EINVAL); 1296 } 1297 /* 1298 * Round infosize to 64 bit boundary if requesting more than just 1299 * the info structure or getting the total data size. 1300 */ 1301 if (where == NULL || *sizep > infosize) 1302 infosize = ((infosize + 7) / 8) * 8; 1303 tsize = infosize + nds * dssize; 1304 1305 /* Return just the total size required. */ 1306 if (where == NULL) { 1307 *sizep = tsize; 1308 return (0); 1309 } 1310 1311 /* Not enough room for even the info struct. */ 1312 if (buflen < infosize) { 1313 *sizep = 0; 1314 return (ENOMEM); 1315 } 1316 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1317 memset(buf, 0, min(tsize, buflen)); 1318 1319 switch (*name) { 1320 #ifdef SYSVMSG 1321 case KERN_SYSVIPC_MSG_INFO: 1322 msgsi = (struct msg_sysctl_info *)buf; 1323 msgsi->msginfo = msginfo; 1324 break; 1325 #endif 1326 #ifdef SYSVSEM 1327 case KERN_SYSVIPC_SEM_INFO: 1328 semsi = (struct sem_sysctl_info *)buf; 1329 semsi->seminfo = seminfo; 1330 break; 1331 #endif 1332 #ifdef SYSVSHM 1333 case KERN_SYSVIPC_SHM_INFO: 1334 shmsi = (struct shm_sysctl_info *)buf; 1335 shmsi->shminfo = shminfo; 1336 break; 1337 #endif 1338 } 1339 buflen -= infosize; 1340 1341 ret = 0; 1342 if (buflen > 0) { 1343 /* Fill in the IPC data structures. */ 1344 for (i = 0; i < nds; i++) { 1345 if (buflen < dssize) { 1346 ret = ENOMEM; 1347 break; 1348 } 1349 switch (*name) { 1350 #ifdef SYSVMSG 1351 case KERN_SYSVIPC_MSG_INFO: 1352 FILL_MSG(msqids[i], msgsi->msgids[i]); 1353 break; 1354 #endif 1355 #ifdef SYSVSEM 1356 case KERN_SYSVIPC_SEM_INFO: 1357 FILL_SEM(sema[i], semsi->semids[i]); 1358 break; 1359 #endif 1360 #ifdef SYSVSHM 1361 case KERN_SYSVIPC_SHM_INFO: 1362 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1363 break; 1364 #endif 1365 } 1366 buflen -= dssize; 1367 } 1368 } 1369 *sizep -= buflen; 1370 error = copyout(buf, start, *sizep); 1371 /* If copyout succeeded, use return code set earlier. */ 1372 if (error == 0) 1373 error = ret; 1374 if (buf) 1375 free(buf, M_TEMP); 1376 return (error); 1377 } 1378 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1379 1380 static int 1381 sysctl_msgbuf(void *vwhere, size_t *sizep) 1382 { 1383 char *where = vwhere; 1384 size_t len, maxlen = *sizep; 1385 long beg, end; 1386 int error; 1387 1388 /* 1389 * deal with cases where the message buffer has 1390 * become corrupted. 1391 */ 1392 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1393 msgbufenabled = 0; 1394 return (ENXIO); 1395 } 1396 1397 if (where == NULL) { 1398 /* always return full buffer size */ 1399 *sizep = msgbufp->msg_bufs; 1400 return (0); 1401 } 1402 1403 error = 0; 1404 maxlen = min(msgbufp->msg_bufs, maxlen); 1405 1406 /* 1407 * First, copy from the write pointer to the end of 1408 * message buffer. 1409 */ 1410 beg = msgbufp->msg_bufx; 1411 end = msgbufp->msg_bufs; 1412 while (maxlen > 0) { 1413 len = min(end - beg, maxlen); 1414 if (len == 0) 1415 break; 1416 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1417 if (error) 1418 break; 1419 where += len; 1420 maxlen -= len; 1421 1422 /* 1423 * ... then, copy from the beginning of message buffer to 1424 * the write pointer. 1425 */ 1426 beg = 0; 1427 end = msgbufp->msg_bufx; 1428 } 1429 return (error); 1430 } 1431 1432 /* 1433 * try over estimating by 5 procs 1434 */ 1435 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1436 1437 static int 1438 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1439 { 1440 struct eproc eproc; 1441 struct kinfo_proc2 kproc2; 1442 struct kinfo_proc *dp; 1443 struct proc *p; 1444 const struct proclist_desc *pd; 1445 char *where, *dp2; 1446 int type, op, arg; 1447 u_int elem_size, elem_count; 1448 size_t buflen, needed; 1449 int error; 1450 1451 dp = vwhere; 1452 dp2 = where = vwhere; 1453 buflen = where != NULL ? *sizep : 0; 1454 error = 0; 1455 needed = 0; 1456 type = name[0]; 1457 1458 if (type == KERN_PROC) { 1459 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1460 return (EINVAL); 1461 op = name[1]; 1462 if (op != KERN_PROC_ALL) 1463 arg = name[2]; 1464 else 1465 arg = 0; /* Quell compiler warning */ 1466 elem_size = elem_count = 0; /* Ditto */ 1467 } else { 1468 if (namelen != 5) 1469 return (EINVAL); 1470 op = name[1]; 1471 arg = name[2]; 1472 elem_size = name[3]; 1473 elem_count = name[4]; 1474 } 1475 1476 proclist_lock_read(); 1477 1478 pd = proclists; 1479 again: 1480 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1481 /* 1482 * Skip embryonic processes. 1483 */ 1484 if (p->p_stat == SIDL) 1485 continue; 1486 /* 1487 * TODO - make more efficient (see notes below). 1488 * do by session. 1489 */ 1490 switch (op) { 1491 1492 case KERN_PROC_PID: 1493 /* could do this with just a lookup */ 1494 if (p->p_pid != (pid_t)arg) 1495 continue; 1496 break; 1497 1498 case KERN_PROC_PGRP: 1499 /* could do this by traversing pgrp */ 1500 if (p->p_pgrp->pg_id != (pid_t)arg) 1501 continue; 1502 break; 1503 1504 case KERN_PROC_SESSION: 1505 if (p->p_session->s_sid != (pid_t)arg) 1506 continue; 1507 break; 1508 1509 case KERN_PROC_TTY: 1510 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1511 if ((p->p_flag & P_CONTROLT) == 0 || 1512 p->p_session->s_ttyp == NULL || 1513 p->p_session->s_ttyvp != NULL) 1514 continue; 1515 } else if ((p->p_flag & P_CONTROLT) == 0 || 1516 p->p_session->s_ttyp == NULL) { 1517 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1518 continue; 1519 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1520 continue; 1521 break; 1522 1523 case KERN_PROC_UID: 1524 if (p->p_ucred->cr_uid != (uid_t)arg) 1525 continue; 1526 break; 1527 1528 case KERN_PROC_RUID: 1529 if (p->p_cred->p_ruid != (uid_t)arg) 1530 continue; 1531 break; 1532 1533 case KERN_PROC_GID: 1534 if (p->p_ucred->cr_gid != (uid_t)arg) 1535 continue; 1536 break; 1537 1538 case KERN_PROC_RGID: 1539 if (p->p_cred->p_rgid != (uid_t)arg) 1540 continue; 1541 break; 1542 1543 case KERN_PROC_ALL: 1544 /* allow everything */ 1545 break; 1546 1547 default: 1548 error = EINVAL; 1549 goto cleanup; 1550 } 1551 if (type == KERN_PROC) { 1552 if (buflen >= sizeof(struct kinfo_proc)) { 1553 fill_eproc(p, &eproc); 1554 error = copyout((caddr_t)p, &dp->kp_proc, 1555 sizeof(struct proc)); 1556 if (error) 1557 goto cleanup; 1558 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1559 sizeof(eproc)); 1560 if (error) 1561 goto cleanup; 1562 dp++; 1563 buflen -= sizeof(struct kinfo_proc); 1564 } 1565 needed += sizeof(struct kinfo_proc); 1566 } else { /* KERN_PROC2 */ 1567 if (buflen >= elem_size && elem_count > 0) { 1568 fill_kproc2(p, &kproc2); 1569 /* 1570 * Copy out elem_size, but not larger than 1571 * the size of a struct kinfo_proc2. 1572 */ 1573 error = copyout(&kproc2, dp2, 1574 min(sizeof(kproc2), elem_size)); 1575 if (error) 1576 goto cleanup; 1577 dp2 += elem_size; 1578 buflen -= elem_size; 1579 elem_count--; 1580 } 1581 needed += elem_size; 1582 } 1583 } 1584 pd++; 1585 if (pd->pd_list != NULL) 1586 goto again; 1587 proclist_unlock_read(); 1588 1589 if (where != NULL) { 1590 if (type == KERN_PROC) 1591 *sizep = (caddr_t)dp - where; 1592 else 1593 *sizep = dp2 - where; 1594 if (needed > *sizep) 1595 return (ENOMEM); 1596 } else { 1597 needed += KERN_PROCSLOP; 1598 *sizep = needed; 1599 } 1600 return (0); 1601 cleanup: 1602 proclist_unlock_read(); 1603 return (error); 1604 } 1605 1606 1607 /* 1608 * try over estimating by 5 LWPs 1609 */ 1610 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1611 1612 static int 1613 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1614 { 1615 struct kinfo_lwp klwp; 1616 struct proc *p; 1617 struct lwp *l; 1618 char *where, *dp; 1619 int type, pid, elem_size, elem_count; 1620 int buflen, needed, error; 1621 1622 dp = where = vwhere; 1623 buflen = where != NULL ? *sizep : 0; 1624 error = needed = 0; 1625 type = name[0]; 1626 1627 if (namelen != 4) 1628 return (EINVAL); 1629 pid = name[1]; 1630 elem_size = name[2]; 1631 elem_count = name[3]; 1632 1633 p = pfind(pid); 1634 if (p == NULL) 1635 return (ESRCH); 1636 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1637 if (buflen >= elem_size && elem_count > 0) { 1638 fill_lwp(l, &klwp); 1639 /* 1640 * Copy out elem_size, but not larger than 1641 * the size of a struct kinfo_proc2. 1642 */ 1643 error = copyout(&klwp, dp, 1644 min(sizeof(klwp), elem_size)); 1645 if (error) 1646 goto cleanup; 1647 dp += elem_size; 1648 buflen -= elem_size; 1649 elem_count--; 1650 } 1651 needed += elem_size; 1652 } 1653 1654 if (where != NULL) { 1655 *sizep = dp - where; 1656 if (needed > *sizep) 1657 return (ENOMEM); 1658 } else { 1659 needed += KERN_PROCSLOP; 1660 *sizep = needed; 1661 } 1662 return (0); 1663 cleanup: 1664 return (error); 1665 } 1666 1667 /* 1668 * Fill in an eproc structure for the specified process. 1669 */ 1670 void 1671 fill_eproc(struct proc *p, struct eproc *ep) 1672 { 1673 struct tty *tp; 1674 struct lwp *l; 1675 1676 ep->e_paddr = p; 1677 ep->e_sess = p->p_session; 1678 ep->e_pcred = *p->p_cred; 1679 ep->e_ucred = *p->p_ucred; 1680 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1681 ep->e_vm.vm_rssize = 0; 1682 ep->e_vm.vm_tsize = 0; 1683 ep->e_vm.vm_dsize = 0; 1684 ep->e_vm.vm_ssize = 0; 1685 /* ep->e_vm.vm_pmap = XXX; */ 1686 } else { 1687 struct vmspace *vm = p->p_vmspace; 1688 1689 ep->e_vm.vm_rssize = vm_resident_count(vm); 1690 ep->e_vm.vm_tsize = vm->vm_tsize; 1691 ep->e_vm.vm_dsize = vm->vm_dsize; 1692 ep->e_vm.vm_ssize = vm->vm_ssize; 1693 1694 /* Pick a "representative" LWP */ 1695 l = proc_representative_lwp(p); 1696 1697 if (l->l_wmesg) 1698 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1699 } 1700 if (p->p_pptr) 1701 ep->e_ppid = p->p_pptr->p_pid; 1702 else 1703 ep->e_ppid = 0; 1704 ep->e_pgid = p->p_pgrp->pg_id; 1705 ep->e_sid = ep->e_sess->s_sid; 1706 ep->e_jobc = p->p_pgrp->pg_jobc; 1707 if ((p->p_flag & P_CONTROLT) && 1708 (tp = ep->e_sess->s_ttyp)) { 1709 ep->e_tdev = tp->t_dev; 1710 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1711 ep->e_tsess = tp->t_session; 1712 } else 1713 ep->e_tdev = NODEV; 1714 1715 ep->e_xsize = ep->e_xrssize = 0; 1716 ep->e_xccount = ep->e_xswrss = 0; 1717 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1718 if (SESS_LEADER(p)) 1719 ep->e_flag |= EPROC_SLEADER; 1720 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1721 } 1722 1723 /* 1724 * Fill in an eproc structure for the specified process. 1725 */ 1726 static void 1727 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1728 { 1729 struct tty *tp; 1730 struct lwp *l; 1731 memset(ki, 0, sizeof(*ki)); 1732 1733 ki->p_paddr = PTRTOINT64(p); 1734 ki->p_fd = PTRTOINT64(p->p_fd); 1735 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1736 ki->p_stats = PTRTOINT64(p->p_stats); 1737 ki->p_limit = PTRTOINT64(p->p_limit); 1738 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1739 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1740 ki->p_sess = PTRTOINT64(p->p_session); 1741 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1742 ki->p_ru = PTRTOINT64(p->p_ru); 1743 1744 ki->p_eflag = 0; 1745 ki->p_exitsig = p->p_exitsig; 1746 ki->p_flag = p->p_flag; 1747 1748 ki->p_pid = p->p_pid; 1749 if (p->p_pptr) 1750 ki->p_ppid = p->p_pptr->p_pid; 1751 else 1752 ki->p_ppid = 0; 1753 ki->p_sid = p->p_session->s_sid; 1754 ki->p__pgid = p->p_pgrp->pg_id; 1755 1756 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1757 1758 ki->p_uid = p->p_ucred->cr_uid; 1759 ki->p_ruid = p->p_cred->p_ruid; 1760 ki->p_gid = p->p_ucred->cr_gid; 1761 ki->p_rgid = p->p_cred->p_rgid; 1762 1763 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1764 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1765 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1766 1767 ki->p_jobc = p->p_pgrp->pg_jobc; 1768 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1769 ki->p_tdev = tp->t_dev; 1770 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1771 ki->p_tsess = PTRTOINT64(tp->t_session); 1772 } else { 1773 ki->p_tdev = NODEV; 1774 } 1775 1776 ki->p_estcpu = p->p_estcpu; 1777 ki->p_rtime_sec = p->p_rtime.tv_sec; 1778 ki->p_rtime_usec = p->p_rtime.tv_usec; 1779 ki->p_cpticks = p->p_cpticks; 1780 ki->p_pctcpu = p->p_pctcpu; 1781 1782 ki->p_uticks = p->p_uticks; 1783 ki->p_sticks = p->p_sticks; 1784 ki->p_iticks = p->p_iticks; 1785 1786 ki->p_tracep = PTRTOINT64(p->p_tracep); 1787 ki->p_traceflag = p->p_traceflag; 1788 1789 1790 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1791 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1792 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1793 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1794 1795 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1796 ki->p_realstat = p->p_stat; 1797 ki->p_nice = p->p_nice; 1798 1799 ki->p_xstat = p->p_xstat; 1800 ki->p_acflag = p->p_acflag; 1801 1802 strncpy(ki->p_comm, p->p_comm, 1803 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1804 1805 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1806 1807 ki->p_nlwps = p->p_nlwps; 1808 ki->p_nrlwps = p->p_nrlwps; 1809 ki->p_realflag = p->p_flag; 1810 1811 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1812 ki->p_vm_rssize = 0; 1813 ki->p_vm_tsize = 0; 1814 ki->p_vm_dsize = 0; 1815 ki->p_vm_ssize = 0; 1816 l = NULL; 1817 } else { 1818 struct vmspace *vm = p->p_vmspace; 1819 1820 ki->p_vm_rssize = vm_resident_count(vm); 1821 ki->p_vm_tsize = vm->vm_tsize; 1822 ki->p_vm_dsize = vm->vm_dsize; 1823 ki->p_vm_ssize = vm->vm_ssize; 1824 1825 /* Pick a "representative" LWP */ 1826 l = proc_representative_lwp(p); 1827 ki->p_forw = PTRTOINT64(l->l_forw); 1828 ki->p_back = PTRTOINT64(l->l_back); 1829 ki->p_addr = PTRTOINT64(l->l_addr); 1830 ki->p_stat = l->l_stat; 1831 ki->p_flag |= l->l_flag; 1832 ki->p_swtime = l->l_swtime; 1833 ki->p_slptime = l->l_slptime; 1834 if (l->l_stat == LSONPROC) { 1835 KDASSERT(l->l_cpu != NULL); 1836 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1837 } else 1838 ki->p_schedflags = 0; 1839 ki->p_holdcnt = l->l_holdcnt; 1840 ki->p_priority = l->l_priority; 1841 ki->p_usrpri = l->l_usrpri; 1842 if (l->l_wmesg) 1843 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1844 ki->p_wchan = PTRTOINT64(l->l_wchan); 1845 1846 } 1847 1848 if (p->p_session->s_ttyvp) 1849 ki->p_eflag |= EPROC_CTTY; 1850 if (SESS_LEADER(p)) 1851 ki->p_eflag |= EPROC_SLEADER; 1852 1853 /* XXX Is this double check necessary? */ 1854 if (P_ZOMBIE(p)) { 1855 ki->p_uvalid = 0; 1856 } else { 1857 ki->p_uvalid = 1; 1858 1859 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1860 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1861 1862 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1863 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1864 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1865 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1866 1867 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1868 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1869 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1870 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1871 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1872 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1873 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1874 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1875 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1876 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1877 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1878 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1879 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1880 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1881 1882 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1883 p->p_stats->p_cru.ru_stime.tv_sec; 1884 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1885 p->p_stats->p_cru.ru_stime.tv_usec; 1886 } 1887 #ifdef MULTIPROCESSOR 1888 if (l && l->l_cpu != NULL) 1889 ki->p_cpuid = l->l_cpu->ci_cpuid; 1890 else 1891 #endif 1892 ki->p_cpuid = KI_NOCPU; 1893 1894 } 1895 1896 /* 1897 * Fill in a kinfo_lwp structure for the specified lwp. 1898 */ 1899 static void 1900 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1901 { 1902 kl->l_forw = PTRTOINT64(l->l_forw); 1903 kl->l_back = PTRTOINT64(l->l_back); 1904 kl->l_laddr = PTRTOINT64(l); 1905 kl->l_addr = PTRTOINT64(l->l_addr); 1906 kl->l_stat = l->l_stat; 1907 kl->l_lid = l->l_lid; 1908 kl->l_flag = l->l_flag; 1909 1910 kl->l_swtime = l->l_swtime; 1911 kl->l_slptime = l->l_slptime; 1912 if (l->l_stat == LSONPROC) { 1913 KDASSERT(l->l_cpu != NULL); 1914 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1915 } else 1916 kl->l_schedflags = 0; 1917 kl->l_holdcnt = l->l_holdcnt; 1918 kl->l_priority = l->l_priority; 1919 kl->l_usrpri = l->l_usrpri; 1920 if (l->l_wmesg) 1921 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1922 kl->l_wchan = PTRTOINT64(l->l_wchan); 1923 #ifdef MULTIPROCESSOR 1924 if (l->l_cpu != NULL) 1925 kl->l_cpuid = l->l_cpu->ci_cpuid; 1926 else 1927 #endif 1928 kl->l_cpuid = KI_NOCPU; 1929 } 1930 1931 int 1932 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1933 struct proc *up) 1934 { 1935 struct ps_strings pss; 1936 struct proc *p; 1937 size_t len, upper_bound, xlen, i; 1938 struct uio auio; 1939 struct iovec aiov; 1940 vaddr_t argv; 1941 pid_t pid; 1942 int nargv, type, error; 1943 char *arg; 1944 char *tmp; 1945 1946 if (namelen != 2) 1947 return (EINVAL); 1948 pid = name[0]; 1949 type = name[1]; 1950 1951 switch (type) { 1952 case KERN_PROC_ARGV: 1953 case KERN_PROC_NARGV: 1954 case KERN_PROC_ENV: 1955 case KERN_PROC_NENV: 1956 /* ok */ 1957 break; 1958 default: 1959 return (EINVAL); 1960 } 1961 1962 /* check pid */ 1963 if ((p = pfind(pid)) == NULL) 1964 return (EINVAL); 1965 1966 /* only root or same user change look at the environment */ 1967 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1968 if (up->p_ucred->cr_uid != 0) { 1969 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1970 up->p_cred->p_ruid != p->p_cred->p_svuid) 1971 return (EPERM); 1972 } 1973 } 1974 1975 if (sizep != NULL && where == NULL) { 1976 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1977 *sizep = sizeof (int); 1978 else 1979 *sizep = ARG_MAX; /* XXX XXX XXX */ 1980 return (0); 1981 } 1982 if (where == NULL || sizep == NULL) 1983 return (EINVAL); 1984 1985 /* 1986 * Zombies don't have a stack, so we can't read their psstrings. 1987 * System processes also don't have a user stack. 1988 */ 1989 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1990 return (EINVAL); 1991 1992 /* 1993 * Lock the process down in memory. 1994 */ 1995 /* XXXCDC: how should locking work here? */ 1996 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1997 return (EFAULT); 1998 1999 p->p_vmspace->vm_refcnt++; /* XXX */ 2000 2001 /* 2002 * Allocate a temporary buffer to hold the arguments. 2003 */ 2004 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2005 2006 /* 2007 * Read in the ps_strings structure. 2008 */ 2009 aiov.iov_base = &pss; 2010 aiov.iov_len = sizeof(pss); 2011 auio.uio_iov = &aiov; 2012 auio.uio_iovcnt = 1; 2013 auio.uio_offset = (vaddr_t)p->p_psstr; 2014 auio.uio_resid = sizeof(pss); 2015 auio.uio_segflg = UIO_SYSSPACE; 2016 auio.uio_rw = UIO_READ; 2017 auio.uio_procp = NULL; 2018 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2019 if (error) 2020 goto done; 2021 2022 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2023 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2024 else 2025 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2026 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2027 error = copyout(&nargv, where, sizeof(nargv)); 2028 *sizep = sizeof(nargv); 2029 goto done; 2030 } 2031 /* 2032 * Now read the address of the argument vector. 2033 */ 2034 switch (type) { 2035 case KERN_PROC_ARGV: 2036 /* XXX compat32 stuff here */ 2037 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2038 break; 2039 case KERN_PROC_ENV: 2040 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2041 break; 2042 default: 2043 return (EINVAL); 2044 } 2045 auio.uio_offset = (off_t)(long)tmp; 2046 aiov.iov_base = &argv; 2047 aiov.iov_len = sizeof(argv); 2048 auio.uio_iov = &aiov; 2049 auio.uio_iovcnt = 1; 2050 auio.uio_resid = sizeof(argv); 2051 auio.uio_segflg = UIO_SYSSPACE; 2052 auio.uio_rw = UIO_READ; 2053 auio.uio_procp = NULL; 2054 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2055 if (error) 2056 goto done; 2057 2058 /* 2059 * Now copy in the actual argument vector, one page at a time, 2060 * since we don't know how long the vector is (though, we do 2061 * know how many NUL-terminated strings are in the vector). 2062 */ 2063 len = 0; 2064 upper_bound = *sizep; 2065 for (; nargv != 0 && len < upper_bound; len += xlen) { 2066 aiov.iov_base = arg; 2067 aiov.iov_len = PAGE_SIZE; 2068 auio.uio_iov = &aiov; 2069 auio.uio_iovcnt = 1; 2070 auio.uio_offset = argv + len; 2071 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2072 auio.uio_resid = xlen; 2073 auio.uio_segflg = UIO_SYSSPACE; 2074 auio.uio_rw = UIO_READ; 2075 auio.uio_procp = NULL; 2076 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2077 if (error) 2078 goto done; 2079 2080 for (i = 0; i < xlen && nargv != 0; i++) { 2081 if (arg[i] == '\0') 2082 nargv--; /* one full string */ 2083 } 2084 2085 /* 2086 * Make sure we don't copyout past the end of the user's 2087 * buffer. 2088 */ 2089 if (len + i > upper_bound) 2090 i = upper_bound - len; 2091 2092 error = copyout(arg, (char *)where + len, i); 2093 if (error) 2094 break; 2095 2096 if (nargv == 0) { 2097 len += i; 2098 break; 2099 } 2100 } 2101 *sizep = len; 2102 2103 done: 2104 uvmspace_free(p->p_vmspace); 2105 2106 free(arg, M_TEMP); 2107 return (error); 2108 } 2109 2110 #if NPTY > 0 2111 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2112 2113 /* 2114 * Validate parameters and get old / set new parameters 2115 * for pty sysctl function. 2116 */ 2117 static int 2118 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2119 { 2120 int error = 0; 2121 int oldmax = 0, newmax = 0; 2122 2123 /* get current value of maxptys */ 2124 oldmax = pty_maxptys(0, 0); 2125 2126 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2127 2128 if (!error && newp) { 2129 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2130 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2131 2132 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2133 return (EINVAL); 2134 2135 } 2136 2137 return (error); 2138 } 2139 #endif /* NPTY > 0 */ 2140 2141 static int 2142 sysctl_dotkstat(name, namelen, where, sizep, newp) 2143 int *name; 2144 u_int namelen; 2145 void *where; 2146 size_t *sizep; 2147 void *newp; 2148 { 2149 /* all sysctl names at this level are terminal */ 2150 if (namelen != 1) 2151 return (ENOTDIR); /* overloaded */ 2152 2153 switch (name[0]) { 2154 case KERN_TKSTAT_NIN: 2155 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2156 case KERN_TKSTAT_NOUT: 2157 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2158 case KERN_TKSTAT_CANCC: 2159 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2160 case KERN_TKSTAT_RAWCC: 2161 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2162 default: 2163 return (EOPNOTSUPP); 2164 } 2165 } 2166
Indexes created Tue Sep 30 11:09:46 GMT 2025