kern_sysctl.c revision 1.86.2.23
1 /* $NetBSD: kern_sysctl.c,v 1.86.2.23 2002/09/17 21:22:13 nathanw Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95 39 */ 40 41 /* 42 * sysctl system call. 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: kern_sysctl.c,v 1.86.2.23 2002/09/17 21:22:13 nathanw 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 default: 597 return (EOPNOTSUPP); 598 } 599 /* NOTREACHED */ 600 } 601 602 /* 603 * hardware related system variables. 604 */ 605 int 606 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 607 void *newp, size_t newlen, struct proc *p) 608 { 609 610 /* All sysctl names at this level, except for a few, are terminal. */ 611 switch (name[0]) { 612 case HW_DISKSTATS: 613 /* Not terminal. */ 614 break; 615 default: 616 if (namelen != 1) 617 return (ENOTDIR); /* overloaded */ 618 } 619 620 switch (name[0]) { 621 case HW_MACHINE: 622 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 623 case HW_MACHINE_ARCH: 624 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 625 case HW_MODEL: 626 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 627 case HW_NCPU: 628 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 629 case HW_BYTEORDER: 630 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 631 case HW_PHYSMEM: 632 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 633 case HW_USERMEM: 634 return (sysctl_rdint(oldp, oldlenp, newp, 635 ctob(physmem - uvmexp.wired))); 636 case HW_PAGESIZE: 637 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 638 case HW_ALIGNBYTES: 639 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 640 case HW_DISKNAMES: 641 return (sysctl_disknames(oldp, oldlenp)); 642 case HW_DISKSTATS: 643 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 644 case HW_CNMAGIC: { 645 char magic[CNS_LEN]; 646 int error; 647 648 if (oldp) 649 cn_get_magic(magic, CNS_LEN); 650 error = sysctl_string(oldp, oldlenp, newp, newlen, 651 magic, sizeof(magic)); 652 if (newp && !error) { 653 error = cn_set_magic(magic); 654 } 655 return (error); 656 } 657 default: 658 return (EOPNOTSUPP); 659 } 660 /* NOTREACHED */ 661 } 662 663 #ifdef DEBUG 664 /* 665 * Debugging related system variables. 666 */ 667 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 668 struct ctldebug debug5, debug6, debug7, debug8, debug9; 669 struct ctldebug debug10, debug11, debug12, debug13, debug14; 670 struct ctldebug debug15, debug16, debug17, debug18, debug19; 671 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 672 &debug0, &debug1, &debug2, &debug3, &debug4, 673 &debug5, &debug6, &debug7, &debug8, &debug9, 674 &debug10, &debug11, &debug12, &debug13, &debug14, 675 &debug15, &debug16, &debug17, &debug18, &debug19, 676 }; 677 678 int 679 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 680 void *newp, size_t newlen, struct proc *p) 681 { 682 struct ctldebug *cdp; 683 684 /* all sysctl names at this level are name and field */ 685 if (namelen != 2) 686 return (ENOTDIR); /* overloaded */ 687 if (name[0] >= CTL_DEBUG_MAXID) 688 return (EOPNOTSUPP); 689 cdp = debugvars[name[0]]; 690 if (cdp->debugname == 0) 691 return (EOPNOTSUPP); 692 switch (name[1]) { 693 case CTL_DEBUG_NAME: 694 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 695 case CTL_DEBUG_VALUE: 696 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 697 default: 698 return (EOPNOTSUPP); 699 } 700 /* NOTREACHED */ 701 } 702 #endif /* DEBUG */ 703 704 int 705 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 706 void *newp, size_t newlen, struct proc *p) 707 { 708 struct proc *ptmp = NULL; 709 const struct proclist_desc *pd; 710 int error = 0; 711 struct rlimit alim; 712 struct plimit *newplim; 713 char *tmps = NULL; 714 size_t len, curlen; 715 u_int i; 716 717 if (namelen < 2) 718 return EINVAL; 719 720 if (name[0] == PROC_CURPROC) { 721 ptmp = p; 722 } else { 723 proclist_lock_read(); 724 for (pd = proclists; pd->pd_list != NULL; pd++) { 725 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 726 ptmp = LIST_NEXT(ptmp, p_list)) { 727 /* Skip embryonic processes. */ 728 if (ptmp->p_stat == SIDL) 729 continue; 730 if (ptmp->p_pid == (pid_t)name[0]) 731 break; 732 } 733 if (ptmp != NULL) 734 break; 735 } 736 proclist_unlock_read(); 737 if (ptmp == NULL) 738 return(ESRCH); 739 if (p->p_ucred->cr_uid != 0) { 740 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 741 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 742 return EPERM; 743 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 744 return EPERM; /* sgid proc */ 745 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 746 if (p->p_ucred->cr_groups[i] == 747 ptmp->p_cred->p_rgid) 748 break; 749 } 750 if (i == p->p_ucred->cr_ngroups) 751 return EPERM; 752 } 753 } 754 if (name[1] == PROC_PID_CORENAME) { 755 if (namelen != 2) 756 return EINVAL; 757 /* 758 * Can't use sysctl_string() here because we may malloc a new 759 * area during the process, so we have to do it by hand. 760 */ 761 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 762 if (oldlenp && *oldlenp < curlen) { 763 if (!oldp) 764 *oldlenp = curlen; 765 return (ENOMEM); 766 } 767 if (newp) { 768 if (securelevel > 2) 769 return EPERM; 770 if (newlen > MAXPATHLEN) 771 return ENAMETOOLONG; 772 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 773 if (tmps == NULL) 774 return ENOMEM; 775 error = copyin(newp, tmps, newlen + 1); 776 tmps[newlen] = '\0'; 777 if (error) 778 goto cleanup; 779 /* Enforce to be either 'core' for end with '.core' */ 780 if (newlen < 4) { /* c.o.r.e */ 781 error = EINVAL; 782 goto cleanup; 783 } 784 len = newlen - 4; 785 if (len > 0) { 786 if (tmps[len - 1] != '.' && 787 tmps[len - 1] != '/') { 788 error = EINVAL; 789 goto cleanup; 790 } 791 } 792 if (strcmp(&tmps[len], "core") != 0) { 793 error = EINVAL; 794 goto cleanup; 795 } 796 } 797 if (oldp && oldlenp) { 798 *oldlenp = curlen; 799 error = copyout(ptmp->p_limit->pl_corename, oldp, 800 curlen); 801 } 802 if (newp && error == 0) { 803 /* if the 2 strings are identical, don't limcopy() */ 804 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 805 error = 0; 806 goto cleanup; 807 } 808 if (ptmp->p_limit->p_refcnt > 1 && 809 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 810 newplim = limcopy(ptmp->p_limit); 811 limfree(ptmp->p_limit); 812 ptmp->p_limit = newplim; 813 } 814 if (ptmp->p_limit->pl_corename != defcorename) { 815 free(ptmp->p_limit->pl_corename, M_TEMP); 816 } 817 ptmp->p_limit->pl_corename = tmps; 818 return (0); 819 } 820 cleanup: 821 if (tmps) 822 free(tmps, M_TEMP); 823 return (error); 824 } 825 if (name[1] == PROC_PID_LIMIT) { 826 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 827 return EINVAL; 828 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 829 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 830 error = sysctl_quad(oldp, oldlenp, newp, newlen, 831 &alim.rlim_max); 832 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 833 error = sysctl_quad(oldp, oldlenp, newp, newlen, 834 &alim.rlim_cur); 835 else 836 error = EINVAL; 837 838 if (error) 839 return error; 840 841 if (newp) 842 error = dosetrlimit(ptmp, p->p_cred, 843 name[2] - 1, &alim); 844 return error; 845 } 846 return (EINVAL); 847 } 848 849 int 850 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 851 void *newp, size_t newlen, struct proc *p) 852 { 853 static struct { 854 const char *name; 855 int type; 856 } emulations[] = CTL_EMUL_NAMES; 857 const struct emul *e; 858 const char *ename; 859 #ifdef LKM 860 extern struct lock exec_lock; /* XXX */ 861 int error; 862 #else 863 extern int nexecs_builtin; 864 extern const struct execsw execsw_builtin[]; 865 int i; 866 #endif 867 868 /* all sysctl names at this level are name and field */ 869 if (namelen < 2) 870 return (ENOTDIR); /* overloaded */ 871 872 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 873 return (EOPNOTSUPP); 874 875 ename = emulations[name[0]].name; 876 877 #ifdef LKM 878 lockmgr(&exec_lock, LK_SHARED, NULL); 879 if ((e = emul_search(ename))) { 880 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 881 newp, newlen, p); 882 } else 883 error = EOPNOTSUPP; 884 lockmgr(&exec_lock, LK_RELEASE, NULL); 885 886 return (error); 887 #else 888 for (i = 0; i < nexecs_builtin; i++) { 889 e = execsw_builtin[i].es_emul; 890 if (e == NULL || strcmp(ename, e->e_name) != 0 || 891 e->e_sysctl != NULL) 892 continue; 893 894 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 895 newp, newlen, p); 896 } 897 898 return (EOPNOTSUPP); 899 #endif 900 } 901 /* 902 * Convenience macros. 903 */ 904 905 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 906 if (oldlenp) { \ 907 if (!oldp) \ 908 *oldlenp = len; \ 909 else { \ 910 if (*oldlenp < len) \ 911 return(ENOMEM); \ 912 *oldlenp = len; \ 913 error = copyout((caddr_t)valp, oldp, len); \ 914 } \ 915 } 916 917 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 918 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 919 920 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 921 if (newp && newlen != len) \ 922 return (EINVAL); 923 924 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 925 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 926 927 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 928 if (error == 0 && newp) \ 929 error = copyin(newp, valp, len); 930 931 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 932 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 933 934 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 935 if (oldlenp) { \ 936 len = strlen(str) + 1; \ 937 if (!oldp) \ 938 *oldlenp = len; \ 939 else { \ 940 if (*oldlenp < len) { \ 941 err2 = ENOMEM; \ 942 len = *oldlenp; \ 943 } else \ 944 *oldlenp = len; \ 945 error = copyout(str, oldp, len);\ 946 if (error == 0) \ 947 error = err2; \ 948 } \ 949 } 950 951 /* 952 * Validate parameters and get old / set new parameters 953 * for an integer-valued sysctl function. 954 */ 955 int 956 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 957 { 958 int error = 0; 959 960 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 961 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 962 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 963 964 return (error); 965 } 966 967 968 /* 969 * As above, but read-only. 970 */ 971 int 972 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 973 { 974 int error = 0; 975 976 if (newp) 977 return (EPERM); 978 979 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 980 981 return (error); 982 } 983 984 /* 985 * Validate parameters and get old / set new parameters 986 * for an quad-valued sysctl function. 987 */ 988 int 989 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 990 quad_t *valp) 991 { 992 int error = 0; 993 994 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 995 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 996 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 997 998 return (error); 999 } 1000 1001 /* 1002 * As above, but read-only. 1003 */ 1004 int 1005 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1006 { 1007 int error = 0; 1008 1009 if (newp) 1010 return (EPERM); 1011 1012 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1013 1014 return (error); 1015 } 1016 1017 /* 1018 * Validate parameters and get old / set new parameters 1019 * for a string-valued sysctl function. 1020 */ 1021 int 1022 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1023 size_t maxlen) 1024 { 1025 int error = 0, err2 = 0; 1026 size_t len; 1027 1028 if (newp && newlen >= maxlen) 1029 return (EINVAL); 1030 1031 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1032 1033 if (error == 0 && newp) { 1034 error = copyin(newp, str, newlen); 1035 str[newlen] = 0; 1036 } 1037 return (error); 1038 } 1039 1040 /* 1041 * As above, but read-only. 1042 */ 1043 int 1044 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1045 { 1046 int error = 0, err2 = 0; 1047 size_t len; 1048 1049 if (newp) 1050 return (EPERM); 1051 1052 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1053 1054 return (error); 1055 } 1056 1057 /* 1058 * Validate parameters and get old / set new parameters 1059 * for a structure oriented sysctl function. 1060 */ 1061 int 1062 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1063 size_t len) 1064 { 1065 int error = 0; 1066 1067 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1068 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1069 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1070 1071 return (error); 1072 } 1073 1074 /* 1075 * Validate parameters and get old parameters 1076 * for a structure oriented sysctl function. 1077 */ 1078 int 1079 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1080 size_t len) 1081 { 1082 int error = 0; 1083 1084 if (newp) 1085 return (EPERM); 1086 1087 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1088 1089 return (error); 1090 } 1091 1092 /* 1093 * As above, but can return a truncated result. 1094 */ 1095 int 1096 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1097 size_t len) 1098 { 1099 int error = 0; 1100 1101 if (newp) 1102 return (EPERM); 1103 1104 len = min(*oldlenp, len); 1105 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1106 1107 return (error); 1108 } 1109 1110 /* 1111 * Get file structures. 1112 */ 1113 static int 1114 sysctl_file(void *vwhere, size_t *sizep) 1115 { 1116 int error; 1117 size_t buflen; 1118 struct file *fp; 1119 char *start, *where; 1120 1121 start = where = vwhere; 1122 buflen = *sizep; 1123 if (where == NULL) { 1124 /* 1125 * overestimate by 10 files 1126 */ 1127 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1128 return (0); 1129 } 1130 1131 /* 1132 * first copyout filehead 1133 */ 1134 if (buflen < sizeof(filehead)) { 1135 *sizep = 0; 1136 return (0); 1137 } 1138 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1139 if (error) 1140 return (error); 1141 buflen -= sizeof(filehead); 1142 where += sizeof(filehead); 1143 1144 /* 1145 * followed by an array of file structures 1146 */ 1147 LIST_FOREACH(fp, &filehead, f_list) { 1148 if (buflen < sizeof(struct file)) { 1149 *sizep = where - start; 1150 return (ENOMEM); 1151 } 1152 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1153 if (error) 1154 return (error); 1155 buflen -= sizeof(struct file); 1156 where += sizeof(struct file); 1157 } 1158 *sizep = where - start; 1159 return (0); 1160 } 1161 1162 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1163 #define FILL_PERM(src, dst) do { \ 1164 (dst)._key = (src)._key; \ 1165 (dst).uid = (src).uid; \ 1166 (dst).gid = (src).gid; \ 1167 (dst).cuid = (src).cuid; \ 1168 (dst).cgid = (src).cgid; \ 1169 (dst).mode = (src).mode; \ 1170 (dst)._seq = (src)._seq; \ 1171 } while (0); 1172 #define FILL_MSG(src, dst) do { \ 1173 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1174 (dst).msg_qnum = (src).msg_qnum; \ 1175 (dst).msg_qbytes = (src).msg_qbytes; \ 1176 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1177 (dst).msg_lspid = (src).msg_lspid; \ 1178 (dst).msg_lrpid = (src).msg_lrpid; \ 1179 (dst).msg_stime = (src).msg_stime; \ 1180 (dst).msg_rtime = (src).msg_rtime; \ 1181 (dst).msg_ctime = (src).msg_ctime; \ 1182 } while (0) 1183 #define FILL_SEM(src, dst) do { \ 1184 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1185 (dst).sem_nsems = (src).sem_nsems; \ 1186 (dst).sem_otime = (src).sem_otime; \ 1187 (dst).sem_ctime = (src).sem_ctime; \ 1188 } while (0) 1189 #define FILL_SHM(src, dst) do { \ 1190 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1191 (dst).shm_segsz = (src).shm_segsz; \ 1192 (dst).shm_lpid = (src).shm_lpid; \ 1193 (dst).shm_cpid = (src).shm_cpid; \ 1194 (dst).shm_atime = (src).shm_atime; \ 1195 (dst).shm_dtime = (src).shm_dtime; \ 1196 (dst).shm_ctime = (src).shm_ctime; \ 1197 (dst).shm_nattch = (src).shm_nattch; \ 1198 } while (0) 1199 1200 static int 1201 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1202 { 1203 #ifdef SYSVMSG 1204 struct msg_sysctl_info *msgsi; 1205 #endif 1206 #ifdef SYSVSEM 1207 struct sem_sysctl_info *semsi; 1208 #endif 1209 #ifdef SYSVSHM 1210 struct shm_sysctl_info *shmsi; 1211 #endif 1212 size_t infosize, dssize, tsize, buflen; 1213 void *buf = NULL; 1214 char *start; 1215 int32_t nds; 1216 int i, error, ret; 1217 1218 if (namelen != 1) 1219 return (EINVAL); 1220 1221 start = where; 1222 buflen = *sizep; 1223 1224 switch (*name) { 1225 case KERN_SYSVIPC_MSG_INFO: 1226 #ifdef SYSVMSG 1227 infosize = sizeof(msgsi->msginfo); 1228 nds = msginfo.msgmni; 1229 dssize = sizeof(msgsi->msgids[0]); 1230 break; 1231 #else 1232 return (EINVAL); 1233 #endif 1234 case KERN_SYSVIPC_SEM_INFO: 1235 #ifdef SYSVSEM 1236 infosize = sizeof(semsi->seminfo); 1237 nds = seminfo.semmni; 1238 dssize = sizeof(semsi->semids[0]); 1239 break; 1240 #else 1241 return (EINVAL); 1242 #endif 1243 case KERN_SYSVIPC_SHM_INFO: 1244 #ifdef SYSVSHM 1245 infosize = sizeof(shmsi->shminfo); 1246 nds = shminfo.shmmni; 1247 dssize = sizeof(shmsi->shmids[0]); 1248 break; 1249 #else 1250 return (EINVAL); 1251 #endif 1252 default: 1253 return (EINVAL); 1254 } 1255 /* 1256 * Round infosize to 64 bit boundary if requesting more than just 1257 * the info structure or getting the total data size. 1258 */ 1259 if (where == NULL || *sizep > infosize) 1260 infosize = ((infosize + 7) / 8) * 8; 1261 tsize = infosize + nds * dssize; 1262 1263 /* Return just the total size required. */ 1264 if (where == NULL) { 1265 *sizep = tsize; 1266 return (0); 1267 } 1268 1269 /* Not enough room for even the info struct. */ 1270 if (buflen < infosize) { 1271 *sizep = 0; 1272 return (ENOMEM); 1273 } 1274 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1275 memset(buf, 0, min(tsize, buflen)); 1276 1277 switch (*name) { 1278 #ifdef SYSVMSG 1279 case KERN_SYSVIPC_MSG_INFO: 1280 msgsi = (struct msg_sysctl_info *)buf; 1281 msgsi->msginfo = msginfo; 1282 break; 1283 #endif 1284 #ifdef SYSVSEM 1285 case KERN_SYSVIPC_SEM_INFO: 1286 semsi = (struct sem_sysctl_info *)buf; 1287 semsi->seminfo = seminfo; 1288 break; 1289 #endif 1290 #ifdef SYSVSHM 1291 case KERN_SYSVIPC_SHM_INFO: 1292 shmsi = (struct shm_sysctl_info *)buf; 1293 shmsi->shminfo = shminfo; 1294 break; 1295 #endif 1296 } 1297 buflen -= infosize; 1298 1299 ret = 0; 1300 if (buflen > 0) { 1301 /* Fill in the IPC data structures. */ 1302 for (i = 0; i < nds; i++) { 1303 if (buflen < dssize) { 1304 ret = ENOMEM; 1305 break; 1306 } 1307 switch (*name) { 1308 #ifdef SYSVMSG 1309 case KERN_SYSVIPC_MSG_INFO: 1310 FILL_MSG(msqids[i], msgsi->msgids[i]); 1311 break; 1312 #endif 1313 #ifdef SYSVSEM 1314 case KERN_SYSVIPC_SEM_INFO: 1315 FILL_SEM(sema[i], semsi->semids[i]); 1316 break; 1317 #endif 1318 #ifdef SYSVSHM 1319 case KERN_SYSVIPC_SHM_INFO: 1320 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1321 break; 1322 #endif 1323 } 1324 buflen -= dssize; 1325 } 1326 } 1327 *sizep -= buflen; 1328 error = copyout(buf, start, *sizep); 1329 /* If copyout succeeded, use return code set earlier. */ 1330 if (error == 0) 1331 error = ret; 1332 if (buf) 1333 free(buf, M_TEMP); 1334 return (error); 1335 } 1336 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1337 1338 static int 1339 sysctl_msgbuf(void *vwhere, size_t *sizep) 1340 { 1341 char *where = vwhere; 1342 size_t len, maxlen = *sizep; 1343 long beg, end; 1344 int error; 1345 1346 /* 1347 * deal with cases where the message buffer has 1348 * become corrupted. 1349 */ 1350 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1351 msgbufenabled = 0; 1352 return (ENXIO); 1353 } 1354 1355 if (where == NULL) { 1356 /* always return full buffer size */ 1357 *sizep = msgbufp->msg_bufs; 1358 return (0); 1359 } 1360 1361 error = 0; 1362 maxlen = min(msgbufp->msg_bufs, maxlen); 1363 1364 /* 1365 * First, copy from the write pointer to the end of 1366 * message buffer. 1367 */ 1368 beg = msgbufp->msg_bufx; 1369 end = msgbufp->msg_bufs; 1370 while (maxlen > 0) { 1371 len = min(end - beg, maxlen); 1372 if (len == 0) 1373 break; 1374 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1375 if (error) 1376 break; 1377 where += len; 1378 maxlen -= len; 1379 1380 /* 1381 * ... then, copy from the beginning of message buffer to 1382 * the write pointer. 1383 */ 1384 beg = 0; 1385 end = msgbufp->msg_bufx; 1386 } 1387 return (error); 1388 } 1389 1390 /* 1391 * try over estimating by 5 procs 1392 */ 1393 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1394 1395 static int 1396 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1397 { 1398 struct eproc eproc; 1399 struct kinfo_proc2 kproc2; 1400 struct kinfo_proc *dp; 1401 struct proc *p; 1402 const struct proclist_desc *pd; 1403 char *where, *dp2; 1404 int type, op, arg; 1405 u_int elem_size, elem_count; 1406 size_t buflen, needed; 1407 int error; 1408 1409 dp = vwhere; 1410 dp2 = where = vwhere; 1411 buflen = where != NULL ? *sizep : 0; 1412 error = 0; 1413 needed = 0; 1414 type = name[0]; 1415 1416 if (type == KERN_PROC) { 1417 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1418 return (EINVAL); 1419 op = name[1]; 1420 if (op != KERN_PROC_ALL) 1421 arg = name[2]; 1422 } else { 1423 if (namelen != 5) 1424 return (EINVAL); 1425 op = name[1]; 1426 arg = name[2]; 1427 elem_size = name[3]; 1428 elem_count = name[4]; 1429 } 1430 1431 proclist_lock_read(); 1432 1433 pd = proclists; 1434 again: 1435 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1436 /* 1437 * Skip embryonic processes. 1438 */ 1439 if (p->p_stat == SIDL) 1440 continue; 1441 /* 1442 * TODO - make more efficient (see notes below). 1443 * do by session. 1444 */ 1445 switch (op) { 1446 1447 case KERN_PROC_PID: 1448 /* could do this with just a lookup */ 1449 if (p->p_pid != (pid_t)arg) 1450 continue; 1451 break; 1452 1453 case KERN_PROC_PGRP: 1454 /* could do this by traversing pgrp */ 1455 if (p->p_pgrp->pg_id != (pid_t)arg) 1456 continue; 1457 break; 1458 1459 case KERN_PROC_SESSION: 1460 if (p->p_session->s_sid != (pid_t)arg) 1461 continue; 1462 break; 1463 1464 case KERN_PROC_TTY: 1465 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1466 if ((p->p_flag & P_CONTROLT) == 0 || 1467 p->p_session->s_ttyp == NULL || 1468 p->p_session->s_ttyvp != NULL) 1469 continue; 1470 } else if ((p->p_flag & P_CONTROLT) == 0 || 1471 p->p_session->s_ttyp == NULL) { 1472 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1473 continue; 1474 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1475 continue; 1476 break; 1477 1478 case KERN_PROC_UID: 1479 if (p->p_ucred->cr_uid != (uid_t)arg) 1480 continue; 1481 break; 1482 1483 case KERN_PROC_RUID: 1484 if (p->p_cred->p_ruid != (uid_t)arg) 1485 continue; 1486 break; 1487 1488 case KERN_PROC_GID: 1489 if (p->p_ucred->cr_gid != (uid_t)arg) 1490 continue; 1491 break; 1492 1493 case KERN_PROC_RGID: 1494 if (p->p_cred->p_rgid != (uid_t)arg) 1495 continue; 1496 break; 1497 1498 case KERN_PROC_ALL: 1499 /* allow everything */ 1500 break; 1501 1502 default: 1503 error = EINVAL; 1504 goto cleanup; 1505 } 1506 if (type == KERN_PROC) { 1507 if (buflen >= sizeof(struct kinfo_proc)) { 1508 fill_eproc(p, &eproc); 1509 error = copyout((caddr_t)p, &dp->kp_proc, 1510 sizeof(struct proc)); 1511 if (error) 1512 goto cleanup; 1513 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1514 sizeof(eproc)); 1515 if (error) 1516 goto cleanup; 1517 dp++; 1518 buflen -= sizeof(struct kinfo_proc); 1519 } 1520 needed += sizeof(struct kinfo_proc); 1521 } else { /* KERN_PROC2 */ 1522 if (buflen >= elem_size && elem_count > 0) { 1523 fill_kproc2(p, &kproc2); 1524 /* 1525 * Copy out elem_size, but not larger than 1526 * the size of a struct kinfo_proc2. 1527 */ 1528 error = copyout(&kproc2, dp2, 1529 min(sizeof(kproc2), elem_size)); 1530 if (error) 1531 goto cleanup; 1532 dp2 += elem_size; 1533 buflen -= elem_size; 1534 elem_count--; 1535 } 1536 needed += elem_size; 1537 } 1538 } 1539 pd++; 1540 if (pd->pd_list != NULL) 1541 goto again; 1542 proclist_unlock_read(); 1543 1544 if (where != NULL) { 1545 if (type == KERN_PROC) 1546 *sizep = (caddr_t)dp - where; 1547 else 1548 *sizep = dp2 - where; 1549 if (needed > *sizep) 1550 return (ENOMEM); 1551 } else { 1552 needed += KERN_PROCSLOP; 1553 *sizep = needed; 1554 } 1555 return (0); 1556 cleanup: 1557 proclist_unlock_read(); 1558 return (error); 1559 } 1560 1561 1562 /* 1563 * try over estimating by 5 LWPs 1564 */ 1565 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1566 1567 static int 1568 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1569 { 1570 struct kinfo_lwp klwp; 1571 struct proc *p; 1572 struct lwp *l; 1573 char *where, *dp; 1574 int type, pid, elem_size, elem_count; 1575 int buflen, needed, error; 1576 1577 dp = where = vwhere; 1578 buflen = where != NULL ? *sizep : 0; 1579 error = needed = 0; 1580 type = name[0]; 1581 1582 if (namelen != 4) 1583 return (EINVAL); 1584 pid = name[1]; 1585 elem_size = name[2]; 1586 elem_count = name[3]; 1587 1588 p = pfind(pid); 1589 if (p == NULL) 1590 return (ESRCH); 1591 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1592 if (buflen >= elem_size && elem_count > 0) { 1593 fill_lwp(l, &klwp); 1594 /* 1595 * Copy out elem_size, but not larger than 1596 * the size of a struct kinfo_proc2. 1597 */ 1598 error = copyout(&klwp, dp, 1599 min(sizeof(klwp), elem_size)); 1600 if (error) 1601 goto cleanup; 1602 dp += elem_size; 1603 buflen -= elem_size; 1604 elem_count--; 1605 } 1606 needed += elem_size; 1607 } 1608 1609 if (where != NULL) { 1610 *sizep = dp - where; 1611 if (needed > *sizep) 1612 return (ENOMEM); 1613 } else { 1614 needed += KERN_PROCSLOP; 1615 *sizep = needed; 1616 } 1617 return (0); 1618 cleanup: 1619 return (error); 1620 } 1621 1622 /* 1623 * Fill in an eproc structure for the specified process. 1624 */ 1625 void 1626 fill_eproc(struct proc *p, struct eproc *ep) 1627 { 1628 struct tty *tp; 1629 struct lwp *l; 1630 1631 ep->e_paddr = p; 1632 ep->e_sess = p->p_session; 1633 ep->e_pcred = *p->p_cred; 1634 ep->e_ucred = *p->p_ucred; 1635 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1636 ep->e_vm.vm_rssize = 0; 1637 ep->e_vm.vm_tsize = 0; 1638 ep->e_vm.vm_dsize = 0; 1639 ep->e_vm.vm_ssize = 0; 1640 /* ep->e_vm.vm_pmap = XXX; */ 1641 } else { 1642 struct vmspace *vm = p->p_vmspace; 1643 1644 ep->e_vm.vm_rssize = vm_resident_count(vm); 1645 ep->e_vm.vm_tsize = vm->vm_tsize; 1646 ep->e_vm.vm_dsize = vm->vm_dsize; 1647 ep->e_vm.vm_ssize = vm->vm_ssize; 1648 1649 /* Pick a "representative" LWP */ 1650 l = proc_representative_lwp(p); 1651 1652 if (l->l_wmesg) 1653 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1654 } 1655 if (p->p_pptr) 1656 ep->e_ppid = p->p_pptr->p_pid; 1657 else 1658 ep->e_ppid = 0; 1659 ep->e_pgid = p->p_pgrp->pg_id; 1660 ep->e_sid = ep->e_sess->s_sid; 1661 ep->e_jobc = p->p_pgrp->pg_jobc; 1662 if ((p->p_flag & P_CONTROLT) && 1663 (tp = ep->e_sess->s_ttyp)) { 1664 ep->e_tdev = tp->t_dev; 1665 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1666 ep->e_tsess = tp->t_session; 1667 } else 1668 ep->e_tdev = NODEV; 1669 1670 ep->e_xsize = ep->e_xrssize = 0; 1671 ep->e_xccount = ep->e_xswrss = 0; 1672 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1673 if (SESS_LEADER(p)) 1674 ep->e_flag |= EPROC_SLEADER; 1675 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1676 } 1677 1678 /* 1679 * Fill in an eproc structure for the specified process. 1680 */ 1681 static void 1682 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1683 { 1684 struct tty *tp; 1685 struct lwp *l; 1686 memset(ki, 0, sizeof(*ki)); 1687 1688 ki->p_paddr = PTRTOINT64(p); 1689 ki->p_fd = PTRTOINT64(p->p_fd); 1690 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1691 ki->p_stats = PTRTOINT64(p->p_stats); 1692 ki->p_limit = PTRTOINT64(p->p_limit); 1693 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1694 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1695 ki->p_sess = PTRTOINT64(p->p_session); 1696 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1697 ki->p_ru = PTRTOINT64(p->p_ru); 1698 1699 ki->p_eflag = 0; 1700 ki->p_exitsig = p->p_exitsig; 1701 ki->p_flag = p->p_flag; 1702 1703 ki->p_pid = p->p_pid; 1704 if (p->p_pptr) 1705 ki->p_ppid = p->p_pptr->p_pid; 1706 else 1707 ki->p_ppid = 0; 1708 ki->p_sid = p->p_session->s_sid; 1709 ki->p__pgid = p->p_pgrp->pg_id; 1710 1711 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1712 1713 ki->p_uid = p->p_ucred->cr_uid; 1714 ki->p_ruid = p->p_cred->p_ruid; 1715 ki->p_gid = p->p_ucred->cr_gid; 1716 ki->p_rgid = p->p_cred->p_rgid; 1717 1718 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1719 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1720 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1721 1722 ki->p_jobc = p->p_pgrp->pg_jobc; 1723 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1724 ki->p_tdev = tp->t_dev; 1725 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1726 ki->p_tsess = PTRTOINT64(tp->t_session); 1727 } else { 1728 ki->p_tdev = NODEV; 1729 } 1730 1731 ki->p_estcpu = p->p_estcpu; 1732 ki->p_rtime_sec = p->p_rtime.tv_sec; 1733 ki->p_rtime_usec = p->p_rtime.tv_usec; 1734 ki->p_cpticks = p->p_cpticks; 1735 ki->p_pctcpu = p->p_pctcpu; 1736 1737 ki->p_uticks = p->p_uticks; 1738 ki->p_sticks = p->p_sticks; 1739 ki->p_iticks = p->p_iticks; 1740 1741 ki->p_tracep = PTRTOINT64(p->p_tracep); 1742 ki->p_traceflag = p->p_traceflag; 1743 1744 1745 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1746 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1747 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1748 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1749 1750 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1751 ki->p_realstat = p->p_stat; 1752 ki->p_nice = p->p_nice; 1753 1754 ki->p_xstat = p->p_xstat; 1755 ki->p_acflag = p->p_acflag; 1756 1757 strncpy(ki->p_comm, p->p_comm, 1758 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1759 1760 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1761 1762 ki->p_nlwps = p->p_nlwps; 1763 ki->p_nrlwps = p->p_nrlwps; 1764 ki->p_realflag = p->p_flag; 1765 1766 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1767 ki->p_vm_rssize = 0; 1768 ki->p_vm_tsize = 0; 1769 ki->p_vm_dsize = 0; 1770 ki->p_vm_ssize = 0; 1771 l = NULL; 1772 } else { 1773 struct vmspace *vm = p->p_vmspace; 1774 1775 ki->p_vm_rssize = vm_resident_count(vm); 1776 ki->p_vm_tsize = vm->vm_tsize; 1777 ki->p_vm_dsize = vm->vm_dsize; 1778 ki->p_vm_ssize = vm->vm_ssize; 1779 1780 /* Pick a "representative" LWP */ 1781 l = proc_representative_lwp(p); 1782 ki->p_forw = PTRTOINT64(l->l_forw); 1783 ki->p_back = PTRTOINT64(l->l_back); 1784 ki->p_addr = PTRTOINT64(l->l_addr); 1785 ki->p_stat = l->l_stat; 1786 ki->p_flag |= l->l_flag; 1787 ki->p_swtime = l->l_swtime; 1788 ki->p_slptime = l->l_slptime; 1789 if (l->l_stat == LSONPROC) { 1790 KDASSERT(l->l_cpu != NULL); 1791 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1792 } else 1793 ki->p_schedflags = 0; 1794 ki->p_holdcnt = l->l_holdcnt; 1795 ki->p_priority = l->l_priority; 1796 ki->p_usrpri = l->l_usrpri; 1797 if (l->l_wmesg) 1798 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1799 ki->p_wchan = PTRTOINT64(l->l_wchan); 1800 1801 } 1802 1803 if (p->p_session->s_ttyvp) 1804 ki->p_eflag |= EPROC_CTTY; 1805 if (SESS_LEADER(p)) 1806 ki->p_eflag |= EPROC_SLEADER; 1807 1808 /* XXX Is this double check necessary? */ 1809 if (P_ZOMBIE(p)) { 1810 ki->p_uvalid = 0; 1811 } else { 1812 ki->p_uvalid = 1; 1813 1814 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1815 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1816 1817 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1818 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1819 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1820 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1821 1822 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1823 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1824 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1825 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1826 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1827 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1828 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1829 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1830 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1831 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1832 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1833 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1834 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1835 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1836 1837 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1838 p->p_stats->p_cru.ru_stime.tv_sec; 1839 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1840 p->p_stats->p_cru.ru_stime.tv_usec; 1841 } 1842 #ifdef MULTIPROCESSOR 1843 if (l && l->l_cpu != NULL) 1844 ki->p_cpuid = l->l_cpu->ci_cpuid; 1845 else 1846 #endif 1847 ki->p_cpuid = KI_NOCPU; 1848 1849 } 1850 1851 /* 1852 * Fill in a kinfo_lwp structure for the specified lwp. 1853 */ 1854 static void 1855 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1856 { 1857 kl->l_forw = PTRTOINT64(l->l_forw); 1858 kl->l_back = PTRTOINT64(l->l_back); 1859 kl->l_laddr = PTRTOINT64(l); 1860 kl->l_addr = PTRTOINT64(l->l_addr); 1861 kl->l_stat = l->l_stat; 1862 kl->l_lid = l->l_lid; 1863 kl->l_flag = l->l_flag; 1864 1865 kl->l_swtime = l->l_swtime; 1866 kl->l_slptime = l->l_slptime; 1867 if (l->l_stat == LSONPROC) { 1868 KDASSERT(l->l_cpu != NULL); 1869 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1870 } else 1871 kl->l_schedflags = 0; 1872 kl->l_holdcnt = l->l_holdcnt; 1873 kl->l_priority = l->l_priority; 1874 kl->l_usrpri = l->l_usrpri; 1875 if (l->l_wmesg) 1876 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1877 kl->l_wchan = PTRTOINT64(l->l_wchan); 1878 #ifdef MULTIPROCESSOR 1879 if (l->l_cpu != NULL) 1880 kl->l_cpuid = l->l_cpu->ci_cpuid; 1881 else 1882 #endif 1883 kl->l_cpuid = KI_NOCPU; 1884 } 1885 1886 int 1887 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1888 struct proc *up) 1889 { 1890 struct ps_strings pss; 1891 struct proc *p; 1892 size_t len, upper_bound, xlen, i; 1893 struct uio auio; 1894 struct iovec aiov; 1895 vaddr_t argv; 1896 pid_t pid; 1897 int nargv, type, error; 1898 char *arg; 1899 char *tmp; 1900 1901 if (namelen != 2) 1902 return (EINVAL); 1903 pid = name[0]; 1904 type = name[1]; 1905 1906 switch (type) { 1907 case KERN_PROC_ARGV: 1908 case KERN_PROC_NARGV: 1909 case KERN_PROC_ENV: 1910 case KERN_PROC_NENV: 1911 /* ok */ 1912 break; 1913 default: 1914 return (EINVAL); 1915 } 1916 1917 /* check pid */ 1918 if ((p = pfind(pid)) == NULL) 1919 return (EINVAL); 1920 1921 /* only root or same user change look at the environment */ 1922 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1923 if (up->p_ucred->cr_uid != 0) { 1924 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1925 up->p_cred->p_ruid != p->p_cred->p_svuid) 1926 return (EPERM); 1927 } 1928 } 1929 1930 if (sizep != NULL && where == NULL) { 1931 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1932 *sizep = sizeof (int); 1933 else 1934 *sizep = ARG_MAX; /* XXX XXX XXX */ 1935 return (0); 1936 } 1937 if (where == NULL || sizep == NULL) 1938 return (EINVAL); 1939 1940 /* 1941 * Zombies don't have a stack, so we can't read their psstrings. 1942 * System processes also don't have a user stack. 1943 */ 1944 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1945 return (EINVAL); 1946 1947 /* 1948 * Lock the process down in memory. 1949 */ 1950 /* XXXCDC: how should locking work here? */ 1951 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1952 return (EFAULT); 1953 1954 p->p_vmspace->vm_refcnt++; /* XXX */ 1955 1956 /* 1957 * Allocate a temporary buffer to hold the arguments. 1958 */ 1959 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1960 1961 /* 1962 * Read in the ps_strings structure. 1963 */ 1964 aiov.iov_base = &pss; 1965 aiov.iov_len = sizeof(pss); 1966 auio.uio_iov = &aiov; 1967 auio.uio_iovcnt = 1; 1968 auio.uio_offset = (vaddr_t)p->p_psstr; 1969 auio.uio_resid = sizeof(pss); 1970 auio.uio_segflg = UIO_SYSSPACE; 1971 auio.uio_rw = UIO_READ; 1972 auio.uio_procp = NULL; 1973 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1974 if (error) 1975 goto done; 1976 1977 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1978 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1979 else 1980 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1981 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1982 error = copyout(&nargv, where, sizeof(nargv)); 1983 *sizep = sizeof(nargv); 1984 goto done; 1985 } 1986 /* 1987 * Now read the address of the argument vector. 1988 */ 1989 switch (type) { 1990 case KERN_PROC_ARGV: 1991 /* XXX compat32 stuff here */ 1992 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1993 break; 1994 case KERN_PROC_ENV: 1995 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1996 break; 1997 default: 1998 return (EINVAL); 1999 } 2000 auio.uio_offset = (off_t)(long)tmp; 2001 aiov.iov_base = &argv; 2002 aiov.iov_len = sizeof(argv); 2003 auio.uio_iov = &aiov; 2004 auio.uio_iovcnt = 1; 2005 auio.uio_resid = sizeof(argv); 2006 auio.uio_segflg = UIO_SYSSPACE; 2007 auio.uio_rw = UIO_READ; 2008 auio.uio_procp = NULL; 2009 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2010 if (error) 2011 goto done; 2012 2013 /* 2014 * Now copy in the actual argument vector, one page at a time, 2015 * since we don't know how long the vector is (though, we do 2016 * know how many NUL-terminated strings are in the vector). 2017 */ 2018 len = 0; 2019 upper_bound = *sizep; 2020 for (; nargv != 0 && len < upper_bound; len += xlen) { 2021 aiov.iov_base = arg; 2022 aiov.iov_len = PAGE_SIZE; 2023 auio.uio_iov = &aiov; 2024 auio.uio_iovcnt = 1; 2025 auio.uio_offset = argv + len; 2026 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2027 auio.uio_resid = xlen; 2028 auio.uio_segflg = UIO_SYSSPACE; 2029 auio.uio_rw = UIO_READ; 2030 auio.uio_procp = NULL; 2031 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2032 if (error) 2033 goto done; 2034 2035 for (i = 0; i < xlen && nargv != 0; i++) { 2036 if (arg[i] == '\0') 2037 nargv--; /* one full string */ 2038 } 2039 2040 /* 2041 * Make sure we don't copyout past the end of the user's 2042 * buffer. 2043 */ 2044 if (len + i > upper_bound) 2045 i = upper_bound - len; 2046 2047 error = copyout(arg, (char *)where + len, i); 2048 if (error) 2049 break; 2050 2051 if (nargv == 0) { 2052 len += i; 2053 break; 2054 } 2055 } 2056 *sizep = len; 2057 2058 done: 2059 uvmspace_free(p->p_vmspace); 2060 2061 free(arg, M_TEMP); 2062 return (error); 2063 } 2064 2065 #if NPTY > 0 2066 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2067 2068 /* 2069 * Validate parameters and get old / set new parameters 2070 * for pty sysctl function. 2071 */ 2072 static int 2073 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2074 { 2075 int error = 0; 2076 int oldmax = 0, newmax = 0; 2077 2078 /* get current value of maxptys */ 2079 oldmax = pty_maxptys(0, 0); 2080 2081 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2082 2083 if (!error && newp) { 2084 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2085 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2086 2087 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2088 return (EINVAL); 2089 2090 } 2091 2092 return (error); 2093 } 2094 #endif /* NPTY > 0 */ 2095 2096 static int 2097 sysctl_dotkstat(name, namelen, where, sizep, newp) 2098 int *name; 2099 u_int namelen; 2100 void *where; 2101 size_t *sizep; 2102 void *newp; 2103 { 2104 /* all sysctl names at this level are terminal */ 2105 if (namelen != 1) 2106 return (ENOTDIR); /* overloaded */ 2107 2108 switch (name[0]) { 2109 case KERN_TKSTAT_NIN: 2110 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2111 case KERN_TKSTAT_NOUT: 2112 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2113 case KERN_TKSTAT_CANCC: 2114 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2115 case KERN_TKSTAT_RAWCC: 2116 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2117 default: 2118 return (EOPNOTSUPP); 2119 } 2120 } 2121
Indexes created Tue Sep 30 06:09:59 GMT 2025