kern_sysctl.c revision 1.86.2.21
1 /* $NetBSD: kern_sysctl.c,v 1.86.2.21 2002/08/01 02:46:22 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 1.86.2.21 2002/08/01 02:46:22 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 int i, curlen, len; 715 716 if (namelen < 2) 717 return EINVAL; 718 719 if (name[0] == PROC_CURPROC) { 720 ptmp = p; 721 } else { 722 proclist_lock_read(); 723 for (pd = proclists; pd->pd_list != NULL; pd++) { 724 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 725 ptmp = LIST_NEXT(ptmp, p_list)) { 726 /* Skip embryonic processes. */ 727 if (ptmp->p_stat == SIDL) 728 continue; 729 if (ptmp->p_pid == (pid_t)name[0]) 730 break; 731 } 732 if (ptmp != NULL) 733 break; 734 } 735 proclist_unlock_read(); 736 if (ptmp == NULL) 737 return(ESRCH); 738 if (p->p_ucred->cr_uid != 0) { 739 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 740 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 741 return EPERM; 742 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 743 return EPERM; /* sgid proc */ 744 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 745 if (p->p_ucred->cr_groups[i] == 746 ptmp->p_cred->p_rgid) 747 break; 748 } 749 if (i == p->p_ucred->cr_ngroups) 750 return EPERM; 751 } 752 } 753 if (name[1] == PROC_PID_CORENAME) { 754 if (namelen != 2) 755 return EINVAL; 756 /* 757 * Can't use sysctl_string() here because we may malloc a new 758 * area during the process, so we have to do it by hand. 759 */ 760 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 761 if (oldlenp && *oldlenp < curlen) { 762 if (!oldp) 763 *oldlenp = curlen; 764 return (ENOMEM); 765 } 766 if (newp) { 767 if (securelevel > 2) 768 return EPERM; 769 if (newlen > MAXPATHLEN) 770 return ENAMETOOLONG; 771 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 772 if (tmps == NULL) 773 return ENOMEM; 774 error = copyin(newp, tmps, newlen + 1); 775 tmps[newlen] = '\0'; 776 if (error) 777 goto cleanup; 778 /* Enforce to be either 'core' for end with '.core' */ 779 if (newlen < 4) { /* c.o.r.e */ 780 error = EINVAL; 781 goto cleanup; 782 } 783 len = newlen - 4; 784 if (len > 0) { 785 if (tmps[len - 1] != '.' && 786 tmps[len - 1] != '/') { 787 error = EINVAL; 788 goto cleanup; 789 } 790 } 791 if (strcmp(&tmps[len], "core") != 0) { 792 error = EINVAL; 793 goto cleanup; 794 } 795 } 796 if (oldp && oldlenp) { 797 *oldlenp = curlen; 798 error = copyout(ptmp->p_limit->pl_corename, oldp, 799 curlen); 800 } 801 if (newp && error == 0) { 802 /* if the 2 strings are identical, don't limcopy() */ 803 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 804 error = 0; 805 goto cleanup; 806 } 807 if (ptmp->p_limit->p_refcnt > 1 && 808 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 809 newplim = limcopy(ptmp->p_limit); 810 limfree(ptmp->p_limit); 811 ptmp->p_limit = newplim; 812 } 813 if (ptmp->p_limit->pl_corename != defcorename) { 814 free(ptmp->p_limit->pl_corename, M_TEMP); 815 } 816 ptmp->p_limit->pl_corename = tmps; 817 return (0); 818 } 819 cleanup: 820 if (tmps) 821 free(tmps, M_TEMP); 822 return (error); 823 } 824 if (name[1] == PROC_PID_LIMIT) { 825 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 826 return EINVAL; 827 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 828 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 829 error = sysctl_quad(oldp, oldlenp, newp, newlen, 830 &alim.rlim_max); 831 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 832 error = sysctl_quad(oldp, oldlenp, newp, newlen, 833 &alim.rlim_cur); 834 else 835 error = EINVAL; 836 837 if (error) 838 return error; 839 840 if (newp) 841 error = dosetrlimit(ptmp, p->p_cred, 842 name[2] - 1, &alim); 843 return error; 844 } 845 return (EINVAL); 846 } 847 848 int 849 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 850 void *newp, size_t newlen, struct proc *p) 851 { 852 static struct { 853 const char *name; 854 int type; 855 } emulations[] = CTL_EMUL_NAMES; 856 const struct emul *e; 857 const char *ename; 858 #ifdef LKM 859 extern struct lock exec_lock; /* XXX */ 860 int error; 861 #else 862 extern int nexecs_builtin; 863 extern const struct execsw execsw_builtin[]; 864 int i; 865 #endif 866 867 /* all sysctl names at this level are name and field */ 868 if (namelen < 2) 869 return (ENOTDIR); /* overloaded */ 870 871 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 872 return (EOPNOTSUPP); 873 874 ename = emulations[name[0]].name; 875 876 #ifdef LKM 877 lockmgr(&exec_lock, LK_SHARED, NULL); 878 if ((e = emul_search(ename))) { 879 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 880 newp, newlen, p); 881 } else 882 error = EOPNOTSUPP; 883 lockmgr(&exec_lock, LK_RELEASE, NULL); 884 885 return (error); 886 #else 887 for (i = 0; i < nexecs_builtin; i++) { 888 e = execsw_builtin[i].es_emul; 889 if (e == NULL || strcmp(ename, e->e_name) != 0 || 890 e->e_sysctl != NULL) 891 continue; 892 893 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 894 newp, newlen, p); 895 } 896 897 return (EOPNOTSUPP); 898 #endif 899 } 900 /* 901 * Convenience macros. 902 */ 903 904 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 905 if (oldlenp) { \ 906 if (!oldp) \ 907 *oldlenp = len; \ 908 else { \ 909 if (*oldlenp < len) \ 910 return(ENOMEM); \ 911 *oldlenp = len; \ 912 error = copyout((caddr_t)valp, oldp, len); \ 913 } \ 914 } 915 916 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 917 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 918 919 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 920 if (newp && newlen != len) \ 921 return (EINVAL); 922 923 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 924 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 925 926 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 927 if (error == 0 && newp) \ 928 error = copyin(newp, valp, len); 929 930 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 931 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 932 933 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 934 if (oldlenp) { \ 935 len = strlen(str) + 1; \ 936 if (!oldp) \ 937 *oldlenp = len; \ 938 else { \ 939 if (*oldlenp < len) { \ 940 err2 = ENOMEM; \ 941 len = *oldlenp; \ 942 } else \ 943 *oldlenp = len; \ 944 error = copyout(str, oldp, len);\ 945 if (error == 0) \ 946 error = err2; \ 947 } \ 948 } 949 950 /* 951 * Validate parameters and get old / set new parameters 952 * for an integer-valued sysctl function. 953 */ 954 int 955 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 956 { 957 int error = 0; 958 959 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 960 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 961 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 962 963 return (error); 964 } 965 966 967 /* 968 * As above, but read-only. 969 */ 970 int 971 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 972 { 973 int error = 0; 974 975 if (newp) 976 return (EPERM); 977 978 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 979 980 return (error); 981 } 982 983 /* 984 * Validate parameters and get old / set new parameters 985 * for an quad-valued sysctl function. 986 */ 987 int 988 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 989 quad_t *valp) 990 { 991 int error = 0; 992 993 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 994 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 995 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 996 997 return (error); 998 } 999 1000 /* 1001 * As above, but read-only. 1002 */ 1003 int 1004 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1005 { 1006 int error = 0; 1007 1008 if (newp) 1009 return (EPERM); 1010 1011 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1012 1013 return (error); 1014 } 1015 1016 /* 1017 * Validate parameters and get old / set new parameters 1018 * for a string-valued sysctl function. 1019 */ 1020 int 1021 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1022 int maxlen) 1023 { 1024 int len, error = 0, err2 = 0; 1025 1026 if (newp && newlen >= maxlen) 1027 return (EINVAL); 1028 1029 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1030 1031 if (error == 0 && newp) { 1032 error = copyin(newp, str, newlen); 1033 str[newlen] = 0; 1034 } 1035 return (error); 1036 } 1037 1038 /* 1039 * As above, but read-only. 1040 */ 1041 int 1042 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1043 { 1044 int len, error = 0, err2 = 0; 1045 1046 if (newp) 1047 return (EPERM); 1048 1049 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1050 1051 return (error); 1052 } 1053 1054 /* 1055 * Validate parameters and get old / set new parameters 1056 * for a structure oriented sysctl function. 1057 */ 1058 int 1059 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1060 int len) 1061 { 1062 int error = 0; 1063 1064 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1065 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1066 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1067 1068 return (error); 1069 } 1070 1071 /* 1072 * Validate parameters and get old parameters 1073 * for a structure oriented sysctl function. 1074 */ 1075 int 1076 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1077 int len) 1078 { 1079 int error = 0; 1080 1081 if (newp) 1082 return (EPERM); 1083 1084 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1085 1086 return (error); 1087 } 1088 1089 /* 1090 * As above, but can return a truncated result. 1091 */ 1092 int 1093 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1094 int len) 1095 { 1096 int error = 0; 1097 1098 if (newp) 1099 return (EPERM); 1100 1101 len = min(*oldlenp, len); 1102 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1103 1104 return (error); 1105 } 1106 1107 /* 1108 * Get file structures. 1109 */ 1110 static int 1111 sysctl_file(void *vwhere, size_t *sizep) 1112 { 1113 int buflen, error; 1114 struct file *fp; 1115 char *start, *where; 1116 1117 start = where = vwhere; 1118 buflen = *sizep; 1119 if (where == NULL) { 1120 /* 1121 * overestimate by 10 files 1122 */ 1123 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1124 return (0); 1125 } 1126 1127 /* 1128 * first copyout filehead 1129 */ 1130 if (buflen < sizeof(filehead)) { 1131 *sizep = 0; 1132 return (0); 1133 } 1134 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1135 if (error) 1136 return (error); 1137 buflen -= sizeof(filehead); 1138 where += sizeof(filehead); 1139 1140 /* 1141 * followed by an array of file structures 1142 */ 1143 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1144 if (buflen < sizeof(struct file)) { 1145 *sizep = where - start; 1146 return (ENOMEM); 1147 } 1148 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1149 if (error) 1150 return (error); 1151 buflen -= sizeof(struct file); 1152 where += sizeof(struct file); 1153 } 1154 *sizep = where - start; 1155 return (0); 1156 } 1157 1158 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1159 #define FILL_PERM(src, dst) do { \ 1160 (dst)._key = (src)._key; \ 1161 (dst).uid = (src).uid; \ 1162 (dst).gid = (src).gid; \ 1163 (dst).cuid = (src).cuid; \ 1164 (dst).cgid = (src).cgid; \ 1165 (dst).mode = (src).mode; \ 1166 (dst)._seq = (src)._seq; \ 1167 } while (0); 1168 #define FILL_MSG(src, dst) do { \ 1169 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1170 (dst).msg_qnum = (src).msg_qnum; \ 1171 (dst).msg_qbytes = (src).msg_qbytes; \ 1172 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1173 (dst).msg_lspid = (src).msg_lspid; \ 1174 (dst).msg_lrpid = (src).msg_lrpid; \ 1175 (dst).msg_stime = (src).msg_stime; \ 1176 (dst).msg_rtime = (src).msg_rtime; \ 1177 (dst).msg_ctime = (src).msg_ctime; \ 1178 } while (0) 1179 #define FILL_SEM(src, dst) do { \ 1180 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1181 (dst).sem_nsems = (src).sem_nsems; \ 1182 (dst).sem_otime = (src).sem_otime; \ 1183 (dst).sem_ctime = (src).sem_ctime; \ 1184 } while (0) 1185 #define FILL_SHM(src, dst) do { \ 1186 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1187 (dst).shm_segsz = (src).shm_segsz; \ 1188 (dst).shm_lpid = (src).shm_lpid; \ 1189 (dst).shm_cpid = (src).shm_cpid; \ 1190 (dst).shm_atime = (src).shm_atime; \ 1191 (dst).shm_dtime = (src).shm_dtime; \ 1192 (dst).shm_ctime = (src).shm_ctime; \ 1193 (dst).shm_nattch = (src).shm_nattch; \ 1194 } while (0) 1195 1196 static int 1197 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1198 { 1199 #ifdef SYSVMSG 1200 struct msg_sysctl_info *msgsi; 1201 #endif 1202 #ifdef SYSVSEM 1203 struct sem_sysctl_info *semsi; 1204 #endif 1205 #ifdef SYSVSHM 1206 struct shm_sysctl_info *shmsi; 1207 #endif 1208 size_t infosize, dssize, tsize, buflen; 1209 void *buf = NULL; 1210 char *start; 1211 int32_t nds; 1212 int i, error, ret; 1213 1214 if (namelen != 1) 1215 return (EINVAL); 1216 1217 start = where; 1218 buflen = *sizep; 1219 1220 switch (*name) { 1221 case KERN_SYSVIPC_MSG_INFO: 1222 #ifdef SYSVMSG 1223 infosize = sizeof(msgsi->msginfo); 1224 nds = msginfo.msgmni; 1225 dssize = sizeof(msgsi->msgids[0]); 1226 break; 1227 #else 1228 return (EINVAL); 1229 #endif 1230 case KERN_SYSVIPC_SEM_INFO: 1231 #ifdef SYSVSEM 1232 infosize = sizeof(semsi->seminfo); 1233 nds = seminfo.semmni; 1234 dssize = sizeof(semsi->semids[0]); 1235 break; 1236 #else 1237 return (EINVAL); 1238 #endif 1239 case KERN_SYSVIPC_SHM_INFO: 1240 #ifdef SYSVSHM 1241 infosize = sizeof(shmsi->shminfo); 1242 nds = shminfo.shmmni; 1243 dssize = sizeof(shmsi->shmids[0]); 1244 break; 1245 #else 1246 return (EINVAL); 1247 #endif 1248 default: 1249 return (EINVAL); 1250 } 1251 /* 1252 * Round infosize to 64 bit boundary if requesting more than just 1253 * the info structure or getting the total data size. 1254 */ 1255 if (where == NULL || *sizep > infosize) 1256 infosize = ((infosize + 7) / 8) * 8; 1257 tsize = infosize + nds * dssize; 1258 1259 /* Return just the total size required. */ 1260 if (where == NULL) { 1261 *sizep = tsize; 1262 return (0); 1263 } 1264 1265 /* Not enough room for even the info struct. */ 1266 if (buflen < infosize) { 1267 *sizep = 0; 1268 return (ENOMEM); 1269 } 1270 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1271 memset(buf, 0, min(tsize, buflen)); 1272 1273 switch (*name) { 1274 #ifdef SYSVMSG 1275 case KERN_SYSVIPC_MSG_INFO: 1276 msgsi = (struct msg_sysctl_info *)buf; 1277 msgsi->msginfo = msginfo; 1278 break; 1279 #endif 1280 #ifdef SYSVSEM 1281 case KERN_SYSVIPC_SEM_INFO: 1282 semsi = (struct sem_sysctl_info *)buf; 1283 semsi->seminfo = seminfo; 1284 break; 1285 #endif 1286 #ifdef SYSVSHM 1287 case KERN_SYSVIPC_SHM_INFO: 1288 shmsi = (struct shm_sysctl_info *)buf; 1289 shmsi->shminfo = shminfo; 1290 break; 1291 #endif 1292 } 1293 buflen -= infosize; 1294 1295 ret = 0; 1296 if (buflen > 0) { 1297 /* Fill in the IPC data structures. */ 1298 for (i = 0; i < nds; i++) { 1299 if (buflen < dssize) { 1300 ret = ENOMEM; 1301 break; 1302 } 1303 switch (*name) { 1304 #ifdef SYSVMSG 1305 case KERN_SYSVIPC_MSG_INFO: 1306 FILL_MSG(msqids[i], msgsi->msgids[i]); 1307 break; 1308 #endif 1309 #ifdef SYSVSEM 1310 case KERN_SYSVIPC_SEM_INFO: 1311 FILL_SEM(sema[i], semsi->semids[i]); 1312 break; 1313 #endif 1314 #ifdef SYSVSHM 1315 case KERN_SYSVIPC_SHM_INFO: 1316 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1317 break; 1318 #endif 1319 } 1320 buflen -= dssize; 1321 } 1322 } 1323 *sizep -= buflen; 1324 error = copyout(buf, start, *sizep); 1325 /* If copyout succeeded, use return code set earlier. */ 1326 if (error == 0) 1327 error = ret; 1328 if (buf) 1329 free(buf, M_TEMP); 1330 return (error); 1331 } 1332 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1333 1334 static int 1335 sysctl_msgbuf(void *vwhere, size_t *sizep) 1336 { 1337 char *where = vwhere; 1338 size_t len, maxlen = *sizep; 1339 long beg, end; 1340 int error; 1341 1342 /* 1343 * deal with cases where the message buffer has 1344 * become corrupted. 1345 */ 1346 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1347 msgbufenabled = 0; 1348 return (ENXIO); 1349 } 1350 1351 if (where == NULL) { 1352 /* always return full buffer size */ 1353 *sizep = msgbufp->msg_bufs; 1354 return (0); 1355 } 1356 1357 error = 0; 1358 maxlen = min(msgbufp->msg_bufs, maxlen); 1359 1360 /* 1361 * First, copy from the write pointer to the end of 1362 * message buffer. 1363 */ 1364 beg = msgbufp->msg_bufx; 1365 end = msgbufp->msg_bufs; 1366 while (maxlen > 0) { 1367 len = min(end - beg, maxlen); 1368 if (len == 0) 1369 break; 1370 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1371 if (error) 1372 break; 1373 where += len; 1374 maxlen -= len; 1375 1376 /* 1377 * ... then, copy from the beginning of message buffer to 1378 * the write pointer. 1379 */ 1380 beg = 0; 1381 end = msgbufp->msg_bufx; 1382 } 1383 return (error); 1384 } 1385 1386 /* 1387 * try over estimating by 5 procs 1388 */ 1389 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1390 1391 static int 1392 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1393 { 1394 struct eproc eproc; 1395 struct kinfo_proc2 kproc2; 1396 struct kinfo_proc *dp; 1397 struct proc *p; 1398 const struct proclist_desc *pd; 1399 char *where, *dp2; 1400 int type, op, arg, elem_size, elem_count; 1401 int buflen, needed, error; 1402 1403 dp = vwhere; 1404 dp2 = where = vwhere; 1405 buflen = where != NULL ? *sizep : 0; 1406 error = needed = 0; 1407 type = name[0]; 1408 1409 if (type == KERN_PROC) { 1410 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1411 return (EINVAL); 1412 op = name[1]; 1413 if (op != KERN_PROC_ALL) 1414 arg = name[2]; 1415 } else { 1416 if (namelen != 5) 1417 return (EINVAL); 1418 op = name[1]; 1419 arg = name[2]; 1420 elem_size = name[3]; 1421 elem_count = name[4]; 1422 } 1423 1424 proclist_lock_read(); 1425 1426 pd = proclists; 1427 again: 1428 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1429 /* 1430 * Skip embryonic processes. 1431 */ 1432 if (p->p_stat == SIDL) 1433 continue; 1434 /* 1435 * TODO - make more efficient (see notes below). 1436 * do by session. 1437 */ 1438 switch (op) { 1439 1440 case KERN_PROC_PID: 1441 /* could do this with just a lookup */ 1442 if (p->p_pid != (pid_t)arg) 1443 continue; 1444 break; 1445 1446 case KERN_PROC_PGRP: 1447 /* could do this by traversing pgrp */ 1448 if (p->p_pgrp->pg_id != (pid_t)arg) 1449 continue; 1450 break; 1451 1452 case KERN_PROC_SESSION: 1453 if (p->p_session->s_sid != (pid_t)arg) 1454 continue; 1455 break; 1456 1457 case KERN_PROC_TTY: 1458 if (arg == KERN_PROC_TTY_REVOKE) { 1459 if ((p->p_flag & P_CONTROLT) == 0 || 1460 p->p_session->s_ttyp == NULL || 1461 p->p_session->s_ttyvp != NULL) 1462 continue; 1463 } else if ((p->p_flag & P_CONTROLT) == 0 || 1464 p->p_session->s_ttyp == NULL) { 1465 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1466 continue; 1467 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1468 continue; 1469 break; 1470 1471 case KERN_PROC_UID: 1472 if (p->p_ucred->cr_uid != (uid_t)arg) 1473 continue; 1474 break; 1475 1476 case KERN_PROC_RUID: 1477 if (p->p_cred->p_ruid != (uid_t)arg) 1478 continue; 1479 break; 1480 1481 case KERN_PROC_GID: 1482 if (p->p_ucred->cr_gid != (uid_t)arg) 1483 continue; 1484 break; 1485 1486 case KERN_PROC_RGID: 1487 if (p->p_cred->p_rgid != (uid_t)arg) 1488 continue; 1489 break; 1490 1491 case KERN_PROC_ALL: 1492 /* allow everything */ 1493 break; 1494 1495 default: 1496 error = EINVAL; 1497 goto cleanup; 1498 } 1499 if (type == KERN_PROC) { 1500 if (buflen >= sizeof(struct kinfo_proc)) { 1501 fill_eproc(p, &eproc); 1502 error = copyout((caddr_t)p, &dp->kp_proc, 1503 sizeof(struct proc)); 1504 if (error) 1505 goto cleanup; 1506 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1507 sizeof(eproc)); 1508 if (error) 1509 goto cleanup; 1510 dp++; 1511 buflen -= sizeof(struct kinfo_proc); 1512 } 1513 needed += sizeof(struct kinfo_proc); 1514 } else { /* KERN_PROC2 */ 1515 if (buflen >= elem_size && elem_count > 0) { 1516 fill_kproc2(p, &kproc2); 1517 /* 1518 * Copy out elem_size, but not larger than 1519 * the size of a struct kinfo_proc2. 1520 */ 1521 error = copyout(&kproc2, dp2, 1522 min(sizeof(kproc2), elem_size)); 1523 if (error) 1524 goto cleanup; 1525 dp2 += elem_size; 1526 buflen -= elem_size; 1527 elem_count--; 1528 } 1529 needed += elem_size; 1530 } 1531 } 1532 pd++; 1533 if (pd->pd_list != NULL) 1534 goto again; 1535 proclist_unlock_read(); 1536 1537 if (where != NULL) { 1538 if (type == KERN_PROC) 1539 *sizep = (caddr_t)dp - where; 1540 else 1541 *sizep = dp2 - where; 1542 if (needed > *sizep) 1543 return (ENOMEM); 1544 } else { 1545 needed += KERN_PROCSLOP; 1546 *sizep = needed; 1547 } 1548 return (0); 1549 cleanup: 1550 proclist_unlock_read(); 1551 return (error); 1552 } 1553 1554 1555 /* 1556 * try over estimating by 5 LWPs 1557 */ 1558 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1559 1560 static int 1561 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1562 { 1563 struct kinfo_lwp klwp; 1564 struct proc *p; 1565 struct lwp *l; 1566 char *where, *dp; 1567 int type, pid, elem_size, elem_count; 1568 int buflen, needed, error; 1569 1570 dp = where = vwhere; 1571 buflen = where != NULL ? *sizep : 0; 1572 error = needed = 0; 1573 type = name[0]; 1574 1575 if (namelen != 4) 1576 return (EINVAL); 1577 pid = name[1]; 1578 elem_size = name[2]; 1579 elem_count = name[3]; 1580 1581 p = pfind(pid); 1582 if (p == NULL) 1583 return (ESRCH); 1584 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1585 if (buflen >= elem_size && elem_count > 0) { 1586 fill_lwp(l, &klwp); 1587 /* 1588 * Copy out elem_size, but not larger than 1589 * the size of a struct kinfo_proc2. 1590 */ 1591 error = copyout(&klwp, dp, 1592 min(sizeof(klwp), elem_size)); 1593 if (error) 1594 goto cleanup; 1595 dp += elem_size; 1596 buflen -= elem_size; 1597 elem_count--; 1598 } 1599 needed += elem_size; 1600 } 1601 1602 if (where != NULL) { 1603 *sizep = dp - where; 1604 if (needed > *sizep) 1605 return (ENOMEM); 1606 } else { 1607 needed += KERN_PROCSLOP; 1608 *sizep = needed; 1609 } 1610 return (0); 1611 cleanup: 1612 return (error); 1613 } 1614 1615 /* 1616 * Fill in an eproc structure for the specified process. 1617 */ 1618 void 1619 fill_eproc(struct proc *p, struct eproc *ep) 1620 { 1621 struct tty *tp; 1622 struct lwp *l; 1623 1624 ep->e_paddr = p; 1625 ep->e_sess = p->p_session; 1626 ep->e_pcred = *p->p_cred; 1627 ep->e_ucred = *p->p_ucred; 1628 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1629 ep->e_vm.vm_rssize = 0; 1630 ep->e_vm.vm_tsize = 0; 1631 ep->e_vm.vm_dsize = 0; 1632 ep->e_vm.vm_ssize = 0; 1633 /* ep->e_vm.vm_pmap = XXX; */ 1634 } else { 1635 struct vmspace *vm = p->p_vmspace; 1636 1637 ep->e_vm.vm_rssize = vm_resident_count(vm); 1638 ep->e_vm.vm_tsize = vm->vm_tsize; 1639 ep->e_vm.vm_dsize = vm->vm_dsize; 1640 ep->e_vm.vm_ssize = vm->vm_ssize; 1641 1642 /* Pick a "representative" LWP */ 1643 l = proc_representative_lwp(p); 1644 1645 if (l->l_wmesg) 1646 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1647 } 1648 if (p->p_pptr) 1649 ep->e_ppid = p->p_pptr->p_pid; 1650 else 1651 ep->e_ppid = 0; 1652 ep->e_pgid = p->p_pgrp->pg_id; 1653 ep->e_sid = ep->e_sess->s_sid; 1654 ep->e_jobc = p->p_pgrp->pg_jobc; 1655 if ((p->p_flag & P_CONTROLT) && 1656 (tp = ep->e_sess->s_ttyp)) { 1657 ep->e_tdev = tp->t_dev; 1658 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1659 ep->e_tsess = tp->t_session; 1660 } else 1661 ep->e_tdev = NODEV; 1662 1663 ep->e_xsize = ep->e_xrssize = 0; 1664 ep->e_xccount = ep->e_xswrss = 0; 1665 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1666 if (SESS_LEADER(p)) 1667 ep->e_flag |= EPROC_SLEADER; 1668 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1669 } 1670 1671 /* 1672 * Fill in an eproc structure for the specified process. 1673 */ 1674 static void 1675 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1676 { 1677 struct tty *tp; 1678 struct lwp *l; 1679 memset(ki, 0, sizeof(*ki)); 1680 1681 ki->p_paddr = PTRTOINT64(p); 1682 ki->p_fd = PTRTOINT64(p->p_fd); 1683 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1684 ki->p_stats = PTRTOINT64(p->p_stats); 1685 ki->p_limit = PTRTOINT64(p->p_limit); 1686 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1687 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1688 ki->p_sess = PTRTOINT64(p->p_session); 1689 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1690 ki->p_ru = PTRTOINT64(p->p_ru); 1691 1692 ki->p_eflag = 0; 1693 ki->p_exitsig = p->p_exitsig; 1694 ki->p_flag = p->p_flag; 1695 1696 ki->p_pid = p->p_pid; 1697 if (p->p_pptr) 1698 ki->p_ppid = p->p_pptr->p_pid; 1699 else 1700 ki->p_ppid = 0; 1701 ki->p_sid = p->p_session->s_sid; 1702 ki->p__pgid = p->p_pgrp->pg_id; 1703 1704 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1705 1706 ki->p_uid = p->p_ucred->cr_uid; 1707 ki->p_ruid = p->p_cred->p_ruid; 1708 ki->p_gid = p->p_ucred->cr_gid; 1709 ki->p_rgid = p->p_cred->p_rgid; 1710 1711 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1712 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1713 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1714 1715 ki->p_jobc = p->p_pgrp->pg_jobc; 1716 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1717 ki->p_tdev = tp->t_dev; 1718 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1719 ki->p_tsess = PTRTOINT64(tp->t_session); 1720 } else { 1721 ki->p_tdev = NODEV; 1722 } 1723 1724 ki->p_estcpu = p->p_estcpu; 1725 ki->p_rtime_sec = p->p_rtime.tv_sec; 1726 ki->p_rtime_usec = p->p_rtime.tv_usec; 1727 ki->p_cpticks = p->p_cpticks; 1728 ki->p_pctcpu = p->p_pctcpu; 1729 1730 ki->p_uticks = p->p_uticks; 1731 ki->p_sticks = p->p_sticks; 1732 ki->p_iticks = p->p_iticks; 1733 1734 ki->p_tracep = PTRTOINT64(p->p_tracep); 1735 ki->p_traceflag = p->p_traceflag; 1736 1737 1738 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1739 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1740 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1741 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1742 1743 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1744 ki->p_realstat = p->p_stat; 1745 ki->p_nice = p->p_nice; 1746 1747 ki->p_xstat = p->p_xstat; 1748 ki->p_acflag = p->p_acflag; 1749 1750 strncpy(ki->p_comm, p->p_comm, 1751 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1752 1753 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1754 1755 ki->p_nlwps = p->p_nlwps; 1756 ki->p_nrlwps = p->p_nrlwps; 1757 ki->p_realflag = p->p_flag; 1758 1759 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1760 ki->p_vm_rssize = 0; 1761 ki->p_vm_tsize = 0; 1762 ki->p_vm_dsize = 0; 1763 ki->p_vm_ssize = 0; 1764 l = NULL; 1765 } else { 1766 struct vmspace *vm = p->p_vmspace; 1767 1768 ki->p_vm_rssize = vm_resident_count(vm); 1769 ki->p_vm_tsize = vm->vm_tsize; 1770 ki->p_vm_dsize = vm->vm_dsize; 1771 ki->p_vm_ssize = vm->vm_ssize; 1772 1773 /* Pick a "representative" LWP */ 1774 l = proc_representative_lwp(p); 1775 ki->p_forw = PTRTOINT64(l->l_forw); 1776 ki->p_back = PTRTOINT64(l->l_back); 1777 ki->p_addr = PTRTOINT64(l->l_addr); 1778 ki->p_stat = l->l_stat; 1779 ki->p_flag |= l->l_flag; 1780 ki->p_swtime = l->l_swtime; 1781 ki->p_slptime = l->l_slptime; 1782 if (l->l_stat == LSONPROC) { 1783 KDASSERT(l->l_cpu != NULL); 1784 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1785 } else 1786 ki->p_schedflags = 0; 1787 ki->p_holdcnt = l->l_holdcnt; 1788 ki->p_priority = l->l_priority; 1789 ki->p_usrpri = l->l_usrpri; 1790 if (l->l_wmesg) 1791 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1792 ki->p_wchan = PTRTOINT64(l->l_wchan); 1793 1794 } 1795 1796 if (p->p_session->s_ttyvp) 1797 ki->p_eflag |= EPROC_CTTY; 1798 if (SESS_LEADER(p)) 1799 ki->p_eflag |= EPROC_SLEADER; 1800 1801 /* XXX Is this double check necessary? */ 1802 if (P_ZOMBIE(p)) { 1803 ki->p_uvalid = 0; 1804 } else { 1805 ki->p_uvalid = 1; 1806 1807 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1808 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1809 1810 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1811 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1812 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1813 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1814 1815 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1816 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1817 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1818 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1819 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1820 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1821 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1822 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1823 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1824 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1825 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1826 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1827 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1828 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1829 1830 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1831 p->p_stats->p_cru.ru_stime.tv_sec; 1832 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1833 p->p_stats->p_cru.ru_stime.tv_usec; 1834 } 1835 #ifdef MULTIPROCESSOR 1836 if (l && l->l_cpu != NULL) 1837 ki->p_cpuid = l->l_cpu->ci_cpuid; 1838 else 1839 #endif 1840 ki->p_cpuid = KI_NOCPU; 1841 1842 } 1843 1844 /* 1845 * Fill in a kinfo_lwp structure for the specified lwp. 1846 */ 1847 static void 1848 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1849 { 1850 kl->l_forw = PTRTOINT64(l->l_forw); 1851 kl->l_back = PTRTOINT64(l->l_back); 1852 kl->l_laddr = PTRTOINT64(l); 1853 kl->l_addr = PTRTOINT64(l->l_addr); 1854 kl->l_stat = l->l_stat; 1855 kl->l_lid = l->l_lid; 1856 kl->l_flag = l->l_flag; 1857 1858 kl->l_swtime = l->l_swtime; 1859 kl->l_slptime = l->l_slptime; 1860 if (l->l_stat == LSONPROC) { 1861 KDASSERT(l->l_cpu != NULL); 1862 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1863 } else 1864 kl->l_schedflags = 0; 1865 kl->l_holdcnt = l->l_holdcnt; 1866 kl->l_priority = l->l_priority; 1867 kl->l_usrpri = l->l_usrpri; 1868 if (l->l_wmesg) 1869 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1870 kl->l_wchan = PTRTOINT64(l->l_wchan); 1871 #ifdef MULTIPROCESSOR 1872 if (l->l_cpu != NULL) 1873 kl->l_cpuid = l->l_cpu->ci_cpuid; 1874 else 1875 #endif 1876 kl->l_cpuid = KI_NOCPU; 1877 } 1878 1879 int 1880 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1881 struct proc *up) 1882 { 1883 struct ps_strings pss; 1884 struct proc *p; 1885 size_t len, upper_bound, xlen; 1886 struct uio auio; 1887 struct iovec aiov; 1888 vaddr_t argv; 1889 pid_t pid; 1890 int nargv, type, error, i; 1891 char *arg; 1892 char *tmp; 1893 1894 if (namelen != 2) 1895 return (EINVAL); 1896 pid = name[0]; 1897 type = name[1]; 1898 1899 switch (type) { 1900 case KERN_PROC_ARGV: 1901 case KERN_PROC_NARGV: 1902 case KERN_PROC_ENV: 1903 case KERN_PROC_NENV: 1904 /* ok */ 1905 break; 1906 default: 1907 return (EINVAL); 1908 } 1909 1910 /* check pid */ 1911 if ((p = pfind(pid)) == NULL) 1912 return (EINVAL); 1913 1914 /* only root or same user change look at the environment */ 1915 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1916 if (up->p_ucred->cr_uid != 0) { 1917 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1918 up->p_cred->p_ruid != p->p_cred->p_svuid) 1919 return (EPERM); 1920 } 1921 } 1922 1923 if (sizep != NULL && where == NULL) { 1924 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1925 *sizep = sizeof (int); 1926 else 1927 *sizep = ARG_MAX; /* XXX XXX XXX */ 1928 return (0); 1929 } 1930 if (where == NULL || sizep == NULL) 1931 return (EINVAL); 1932 1933 /* 1934 * Zombies don't have a stack, so we can't read their psstrings. 1935 * System processes also don't have a user stack. 1936 */ 1937 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1938 return (EINVAL); 1939 1940 /* 1941 * Lock the process down in memory. 1942 */ 1943 /* XXXCDC: how should locking work here? */ 1944 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1945 return (EFAULT); 1946 1947 p->p_vmspace->vm_refcnt++; /* XXX */ 1948 1949 /* 1950 * Allocate a temporary buffer to hold the arguments. 1951 */ 1952 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1953 1954 /* 1955 * Read in the ps_strings structure. 1956 */ 1957 aiov.iov_base = &pss; 1958 aiov.iov_len = sizeof(pss); 1959 auio.uio_iov = &aiov; 1960 auio.uio_iovcnt = 1; 1961 auio.uio_offset = (vaddr_t)p->p_psstr; 1962 auio.uio_resid = sizeof(pss); 1963 auio.uio_segflg = UIO_SYSSPACE; 1964 auio.uio_rw = UIO_READ; 1965 auio.uio_procp = NULL; 1966 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1967 if (error) 1968 goto done; 1969 1970 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1971 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1972 else 1973 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1974 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1975 error = copyout(&nargv, where, sizeof(nargv)); 1976 *sizep = sizeof(nargv); 1977 goto done; 1978 } 1979 /* 1980 * Now read the address of the argument vector. 1981 */ 1982 switch (type) { 1983 case KERN_PROC_ARGV: 1984 /* XXX compat32 stuff here */ 1985 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1986 break; 1987 case KERN_PROC_ENV: 1988 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1989 break; 1990 default: 1991 return (EINVAL); 1992 } 1993 auio.uio_offset = (off_t)(long)tmp; 1994 aiov.iov_base = &argv; 1995 aiov.iov_len = sizeof(argv); 1996 auio.uio_iov = &aiov; 1997 auio.uio_iovcnt = 1; 1998 auio.uio_resid = sizeof(argv); 1999 auio.uio_segflg = UIO_SYSSPACE; 2000 auio.uio_rw = UIO_READ; 2001 auio.uio_procp = NULL; 2002 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2003 if (error) 2004 goto done; 2005 2006 /* 2007 * Now copy in the actual argument vector, one page at a time, 2008 * since we don't know how long the vector is (though, we do 2009 * know how many NUL-terminated strings are in the vector). 2010 */ 2011 len = 0; 2012 upper_bound = *sizep; 2013 for (; nargv != 0 && len < upper_bound; len += xlen) { 2014 aiov.iov_base = arg; 2015 aiov.iov_len = PAGE_SIZE; 2016 auio.uio_iov = &aiov; 2017 auio.uio_iovcnt = 1; 2018 auio.uio_offset = argv + len; 2019 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2020 auio.uio_resid = xlen; 2021 auio.uio_segflg = UIO_SYSSPACE; 2022 auio.uio_rw = UIO_READ; 2023 auio.uio_procp = NULL; 2024 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2025 if (error) 2026 goto done; 2027 2028 for (i = 0; i < xlen && nargv != 0; i++) { 2029 if (arg[i] == '\0') 2030 nargv--; /* one full string */ 2031 } 2032 2033 /* make sure we don't copyout past the end of the user's buffer */ 2034 if (len + i > upper_bound) 2035 i = upper_bound - len; 2036 2037 error = copyout(arg, (char *)where + len, i); 2038 if (error) 2039 break; 2040 2041 if (nargv == 0) { 2042 len += i; 2043 break; 2044 } 2045 } 2046 *sizep = len; 2047 2048 done: 2049 uvmspace_free(p->p_vmspace); 2050 2051 free(arg, M_TEMP); 2052 return (error); 2053 } 2054 2055 #if NPTY > 0 2056 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2057 2058 /* 2059 * Validate parameters and get old / set new parameters 2060 * for pty sysctl function. 2061 */ 2062 static int 2063 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2064 { 2065 int error = 0; 2066 int oldmax = 0, newmax = 0; 2067 2068 /* get current value of maxptys */ 2069 oldmax = pty_maxptys(0, 0); 2070 2071 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2072 2073 if (!error && newp) { 2074 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2075 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2076 2077 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2078 return (EINVAL); 2079 2080 } 2081 2082 return (error); 2083 } 2084 #endif /* NPTY > 0 */ 2085 2086 static int 2087 sysctl_dotkstat(name, namelen, where, sizep, newp) 2088 int *name; 2089 u_int namelen; 2090 void *where; 2091 size_t *sizep; 2092 void *newp; 2093 { 2094 /* all sysctl names at this level are terminal */ 2095 if (namelen != 1) 2096 return (ENOTDIR); /* overloaded */ 2097 2098 switch (name[0]) { 2099 case KERN_TKSTAT_NIN: 2100 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2101 case KERN_TKSTAT_NOUT: 2102 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2103 case KERN_TKSTAT_CANCC: 2104 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2105 case KERN_TKSTAT_RAWCC: 2106 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2107 default: 2108 return (EOPNOTSUPP); 2109 } 2110 } 2111
Indexes created Tue Sep 30 06:09:59 GMT 2025