kern_sysctl.c revision 1.86.2.20
1 /* $NetBSD: kern_sysctl.c,v 1.86.2.20 2002/07/12 01:40:19 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 1.86.2.20 2002/07/12 01:40:19 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 55 #include <sys/param.h> 56 #include <sys/systm.h> 57 #include <sys/kernel.h> 58 #include <sys/buf.h> 59 #include <sys/device.h> 60 #include <sys/disklabel.h> 61 #include <sys/dkstat.h> 62 #include <sys/exec.h> 63 #include <sys/file.h> 64 #include <sys/ioctl.h> 65 #include <sys/malloc.h> 66 #include <sys/mount.h> 67 #include <sys/msgbuf.h> 68 #include <sys/pool.h> 69 #include <sys/proc.h> 70 #include <sys/resource.h> 71 #include <sys/resourcevar.h> 72 #include <sys/sa.h> 73 #include <sys/syscallargs.h> 74 #include <sys/tty.h> 75 #include <sys/unistd.h> 76 #include <sys/vnode.h> 77 #include <sys/socketvar.h> 78 #define __SYSCTL_PRIVATE 79 #include <sys/sysctl.h> 80 #include <sys/lock.h> 81 #include <sys/namei.h> 82 83 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 84 #include <sys/ipc.h> 85 #endif 86 #ifdef SYSVMSG 87 #include <sys/msg.h> 88 #endif 89 #ifdef SYSVSEM 90 #include <sys/sem.h> 91 #endif 92 #ifdef SYSVSHM 93 #include <sys/shm.h> 94 #endif 95 96 #include <dev/cons.h> 97 98 #if defined(DDB) 99 #include <ddb/ddbvar.h> 100 #endif 101 102 #ifndef PIPE_SOCKETPAIR 103 #include <sys/pipe.h> 104 #endif 105 106 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 107 108 static int sysctl_file(void *, size_t *); 109 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 110 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 111 #endif 112 static int sysctl_msgbuf(void *, size_t *); 113 static int sysctl_doeproc(int *, u_int, void *, size_t *); 114 static int sysctl_dolwp(int *, u_int, void *, size_t *); 115 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 116 #ifdef MULTIPROCESSOR 117 static int sysctl_docptime(void *, size_t *, void *); 118 static int sysctl_ncpus(void); 119 #endif 120 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 121 static void fill_lwp(struct lwp *, struct kinfo_lwp *); 122 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 123 #if NPTY > 0 124 static int sysctl_pty(void *, size_t *, void *, size_t); 125 #endif 126 127 /* 128 * The `sysctl_memlock' is intended to keep too many processes from 129 * locking down memory by doing sysctls at once. Whether or not this 130 * is really a good idea to worry about it probably a subject of some 131 * debate. 132 */ 133 struct lock sysctl_memlock; 134 135 void 136 sysctl_init(void) 137 { 138 139 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 140 } 141 142 int 143 sys___sysctl(struct lwp *l, void *v, register_t *retval) 144 { 145 struct sys___sysctl_args /* { 146 syscallarg(int *) name; 147 syscallarg(u_int) namelen; 148 syscallarg(void *) old; 149 syscallarg(size_t *) oldlenp; 150 syscallarg(void *) new; 151 syscallarg(size_t) newlen; 152 } */ *uap = v; 153 struct proc *p = l->l_proc; 154 int error; 155 size_t savelen = 0, oldlen = 0; 156 sysctlfn *fn; 157 int name[CTL_MAXNAME]; 158 size_t *oldlenp; 159 160 /* 161 * all top-level sysctl names are non-terminal 162 */ 163 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 164 return (EINVAL); 165 error = copyin(SCARG(uap, name), &name, 166 SCARG(uap, namelen) * sizeof(int)); 167 if (error) 168 return (error); 169 170 /* 171 * For all but CTL_PROC, must be root to change a value. 172 * For CTL_PROC, must be root, or owner of the proc (and not suid), 173 * this is checked in proc_sysctl() (once we know the targer proc). 174 */ 175 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 176 (error = suser(p->p_ucred, &p->p_acflag))) 177 return error; 178 179 switch (name[0]) { 180 case CTL_KERN: 181 fn = kern_sysctl; 182 break; 183 case CTL_HW: 184 fn = hw_sysctl; 185 break; 186 case CTL_VM: 187 fn = uvm_sysctl; 188 break; 189 case CTL_NET: 190 fn = net_sysctl; 191 break; 192 case CTL_VFS: 193 fn = vfs_sysctl; 194 break; 195 case CTL_MACHDEP: 196 fn = cpu_sysctl; 197 break; 198 #ifdef DEBUG 199 case CTL_DEBUG: 200 fn = debug_sysctl; 201 break; 202 #endif 203 #ifdef DDB 204 case CTL_DDB: 205 fn = ddb_sysctl; 206 break; 207 #endif 208 case CTL_PROC: 209 fn = proc_sysctl; 210 break; 211 212 case CTL_EMUL: 213 fn = emul_sysctl; 214 break; 215 default: 216 return (EOPNOTSUPP); 217 } 218 219 /* 220 * XXX Hey, we wire `old', but what about `new'? 221 */ 222 223 oldlenp = SCARG(uap, oldlenp); 224 if (oldlenp) { 225 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 226 return (error); 227 oldlenp = &oldlen; 228 } 229 if (SCARG(uap, old) != NULL) { 230 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 231 if (error) 232 return (error); 233 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 234 if (error) { 235 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 236 return error; 237 } 238 savelen = oldlen; 239 } 240 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 241 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 242 if (SCARG(uap, old) != NULL) { 243 uvm_vsunlock(p, SCARG(uap, old), savelen); 244 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 245 } 246 if (error) 247 return (error); 248 if (SCARG(uap, oldlenp)) 249 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 250 return (error); 251 } 252 253 /* 254 * Attributes stored in the kernel. 255 */ 256 char hostname[MAXHOSTNAMELEN]; 257 int hostnamelen; 258 259 char domainname[MAXHOSTNAMELEN]; 260 int domainnamelen; 261 262 long hostid; 263 264 #ifdef INSECURE 265 int securelevel = -1; 266 #else 267 int securelevel = 0; 268 #endif 269 270 #ifndef DEFCORENAME 271 #define DEFCORENAME "%n.core" 272 #endif 273 char defcorename[MAXPATHLEN] = DEFCORENAME; 274 int defcorenamelen = sizeof(DEFCORENAME); 275 276 extern int kern_logsigexit; 277 extern fixpt_t ccpu; 278 279 #ifndef MULTIPROCESSOR 280 #define sysctl_ncpus() 1 281 #endif 282 283 #ifdef MULTIPROCESSOR 284 285 #ifndef CPU_INFO_FOREACH 286 #define CPU_INFO_ITERATOR int 287 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 288 #endif 289 290 static int 291 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 292 { 293 u_int64_t cp_time[CPUSTATES]; 294 int i; 295 struct cpu_info *ci; 296 CPU_INFO_ITERATOR cii; 297 298 for (i=0; i<CPUSTATES; i++) 299 cp_time[i] = 0; 300 301 for (CPU_INFO_FOREACH(cii, ci)) { 302 for (i=0; i<CPUSTATES; i++) 303 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 304 } 305 return (sysctl_rdstruct(oldp, oldlenp, newp, 306 cp_time, sizeof(cp_time))); 307 } 308 309 static int 310 sysctl_ncpus(void) 311 { 312 struct cpu_info *ci; 313 CPU_INFO_ITERATOR cii; 314 315 int ncpus = 0; 316 for (CPU_INFO_FOREACH(cii, ci)) 317 ncpus++; 318 return ncpus; 319 } 320 321 #endif 322 323 /* 324 * kernel related system variables. 325 */ 326 int 327 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 328 void *newp, size_t newlen, struct proc *p) 329 { 330 int error, level, inthostid; 331 int old_autonicetime; 332 int old_vnodes; 333 dev_t consdev; 334 335 /* All sysctl names at this level, except for a few, are terminal. */ 336 switch (name[0]) { 337 case KERN_PROC: 338 case KERN_PROC2: 339 case KERN_LWP: 340 case KERN_PROF: 341 case KERN_MBUF: 342 case KERN_PROC_ARGS: 343 case KERN_SYSVIPC_INFO: 344 case KERN_PIPE: 345 case KERN_TKSTAT: 346 /* Not terminal. */ 347 break; 348 default: 349 if (namelen != 1) 350 return (ENOTDIR); /* overloaded */ 351 } 352 353 switch (name[0]) { 354 case KERN_OSTYPE: 355 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 356 case KERN_OSRELEASE: 357 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 358 case KERN_OSREV: 359 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 360 case KERN_VERSION: 361 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 362 case KERN_MAXVNODES: 363 old_vnodes = desiredvnodes; 364 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 365 if (newp && !error) { 366 if (old_vnodes > desiredvnodes) { 367 desiredvnodes = old_vnodes; 368 return (EINVAL); 369 } 370 vfs_reinit(); 371 nchreinit(); 372 } 373 return (error); 374 case KERN_MAXPROC: 375 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 376 case KERN_MAXFILES: 377 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 378 case KERN_ARGMAX: 379 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 380 case KERN_SECURELVL: 381 level = securelevel; 382 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 383 newp == NULL) 384 return (error); 385 if (level < securelevel && p->p_pid != 1) 386 return (EPERM); 387 securelevel = level; 388 return (0); 389 case KERN_HOSTNAME: 390 error = sysctl_string(oldp, oldlenp, newp, newlen, 391 hostname, sizeof(hostname)); 392 if (newp && !error) 393 hostnamelen = newlen; 394 return (error); 395 case KERN_DOMAINNAME: 396 error = sysctl_string(oldp, oldlenp, newp, newlen, 397 domainname, sizeof(domainname)); 398 if (newp && !error) 399 domainnamelen = newlen; 400 return (error); 401 case KERN_HOSTID: 402 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 403 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 404 if (newp && !error) 405 hostid = inthostid; 406 return (error); 407 case KERN_CLOCKRATE: 408 return (sysctl_clockrate(oldp, oldlenp)); 409 case KERN_BOOTTIME: 410 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 411 sizeof(struct timeval))); 412 case KERN_VNODE: 413 return (sysctl_vnode(oldp, oldlenp, p)); 414 case KERN_PROC: 415 case KERN_PROC2: 416 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 417 case KERN_LWP: 418 return (sysctl_dolwp(name, namelen, oldp, oldlenp)); 419 case KERN_PROC_ARGS: 420 return (sysctl_procargs(name + 1, namelen - 1, 421 oldp, oldlenp, p)); 422 case KERN_FILE: 423 return (sysctl_file(oldp, oldlenp)); 424 #ifdef GPROF 425 case KERN_PROF: 426 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 427 newp, newlen)); 428 #endif 429 case KERN_POSIX1: 430 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 431 case KERN_NGROUPS: 432 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 433 case KERN_JOB_CONTROL: 434 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 435 case KERN_SAVED_IDS: 436 #ifdef _POSIX_SAVED_IDS 437 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 438 #else 439 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 440 #endif 441 case KERN_MAXPARTITIONS: 442 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 443 case KERN_RAWPARTITION: 444 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 445 #ifdef NTP 446 case KERN_NTPTIME: 447 return (sysctl_ntptime(oldp, oldlenp)); 448 #endif 449 case KERN_AUTONICETIME: 450 old_autonicetime = autonicetime; 451 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 452 if (autonicetime < 0) 453 autonicetime = old_autonicetime; 454 return (error); 455 case KERN_AUTONICEVAL: 456 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 457 if (autoniceval < PRIO_MIN) 458 autoniceval = PRIO_MIN; 459 if (autoniceval > PRIO_MAX) 460 autoniceval = PRIO_MAX; 461 return (error); 462 case KERN_RTC_OFFSET: 463 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 464 case KERN_ROOT_DEVICE: 465 return (sysctl_rdstring(oldp, oldlenp, newp, 466 root_device->dv_xname)); 467 case KERN_MSGBUFSIZE: 468 /* 469 * deal with cases where the message buffer has 470 * become corrupted. 471 */ 472 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 473 msgbufenabled = 0; 474 return (ENXIO); 475 } 476 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 477 case KERN_FSYNC: 478 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 479 case KERN_SYSVMSG: 480 #ifdef SYSVMSG 481 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 482 #else 483 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 484 #endif 485 case KERN_SYSVSEM: 486 #ifdef SYSVSEM 487 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 488 #else 489 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 490 #endif 491 case KERN_SYSVSHM: 492 #ifdef SYSVSHM 493 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 494 #else 495 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 496 #endif 497 case KERN_DEFCORENAME: 498 if (newp && newlen < 1) 499 return (EINVAL); 500 error = sysctl_string(oldp, oldlenp, newp, newlen, 501 defcorename, sizeof(defcorename)); 502 if (newp && !error) 503 defcorenamelen = newlen; 504 return (error); 505 case KERN_SYNCHRONIZED_IO: 506 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 507 case KERN_IOV_MAX: 508 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 509 case KERN_MBUF: 510 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 511 newp, newlen)); 512 case KERN_MAPPED_FILES: 513 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 514 case KERN_MEMLOCK: 515 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 516 case KERN_MEMLOCK_RANGE: 517 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 518 case KERN_MEMORY_PROTECTION: 519 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 520 case KERN_LOGIN_NAME_MAX: 521 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 522 case KERN_LOGSIGEXIT: 523 return (sysctl_int(oldp, oldlenp, newp, newlen, 524 &kern_logsigexit)); 525 case KERN_FSCALE: 526 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 527 case KERN_CCPU: 528 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 529 case KERN_CP_TIME: 530 #ifndef MULTIPROCESSOR 531 return (sysctl_rdstruct(oldp, oldlenp, newp, 532 curcpu()->ci_schedstate.spc_cp_time, 533 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 534 #else 535 return (sysctl_docptime(oldp, oldlenp, newp)); 536 #endif 537 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 538 case KERN_SYSVIPC_INFO: 539 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 540 #endif 541 case KERN_MSGBUF: 542 return (sysctl_msgbuf(oldp, oldlenp)); 543 case KERN_CONSDEV: 544 if (cn_tab != NULL) 545 consdev = cn_tab->cn_dev; 546 else 547 consdev = NODEV; 548 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 549 sizeof consdev)); 550 #if NPTY > 0 551 case KERN_MAXPTYS: 552 return sysctl_pty(oldp, oldlenp, newp, newlen); 553 #endif 554 #ifndef PIPE_SOCKETPAIR 555 case KERN_PIPE: 556 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 557 newp, newlen)); 558 #endif 559 case KERN_MAXPHYS: 560 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 561 case KERN_SBMAX: 562 { 563 int new_sbmax = sb_max; 564 565 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 566 if (newp && !error) { 567 if (new_sbmax < (16 * 1024)) /* sanity */ 568 return (EINVAL); 569 sb_max = new_sbmax; 570 } 571 return (error); 572 } 573 case KERN_TKSTAT: 574 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 575 newp)); 576 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 577 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 578 default: 579 return (EOPNOTSUPP); 580 } 581 /* NOTREACHED */ 582 } 583 584 /* 585 * hardware related system variables. 586 */ 587 int 588 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 589 void *newp, size_t newlen, struct proc *p) 590 { 591 592 /* All sysctl names at this level, except for a few, are terminal. */ 593 switch (name[0]) { 594 case HW_DISKSTATS: 595 /* Not terminal. */ 596 break; 597 default: 598 if (namelen != 1) 599 return (ENOTDIR); /* overloaded */ 600 } 601 602 switch (name[0]) { 603 case HW_MACHINE: 604 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 605 case HW_MACHINE_ARCH: 606 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 607 case HW_MODEL: 608 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 609 case HW_NCPU: 610 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 611 case HW_BYTEORDER: 612 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 613 case HW_PHYSMEM: 614 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 615 case HW_USERMEM: 616 return (sysctl_rdint(oldp, oldlenp, newp, 617 ctob(physmem - uvmexp.wired))); 618 case HW_PAGESIZE: 619 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 620 case HW_ALIGNBYTES: 621 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 622 case HW_DISKNAMES: 623 return (sysctl_disknames(oldp, oldlenp)); 624 case HW_DISKSTATS: 625 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 626 case HW_CNMAGIC: { 627 char magic[CNS_LEN]; 628 int error; 629 630 if (oldp) 631 cn_get_magic(magic, CNS_LEN); 632 error = sysctl_string(oldp, oldlenp, newp, newlen, 633 magic, sizeof(magic)); 634 if (newp && !error) { 635 error = cn_set_magic(magic); 636 } 637 return (error); 638 } 639 default: 640 return (EOPNOTSUPP); 641 } 642 /* NOTREACHED */ 643 } 644 645 #ifdef DEBUG 646 /* 647 * Debugging related system variables. 648 */ 649 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 650 struct ctldebug debug5, debug6, debug7, debug8, debug9; 651 struct ctldebug debug10, debug11, debug12, debug13, debug14; 652 struct ctldebug debug15, debug16, debug17, debug18, debug19; 653 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 654 &debug0, &debug1, &debug2, &debug3, &debug4, 655 &debug5, &debug6, &debug7, &debug8, &debug9, 656 &debug10, &debug11, &debug12, &debug13, &debug14, 657 &debug15, &debug16, &debug17, &debug18, &debug19, 658 }; 659 660 int 661 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 662 void *newp, size_t newlen, struct proc *p) 663 { 664 struct ctldebug *cdp; 665 666 /* all sysctl names at this level are name and field */ 667 if (namelen != 2) 668 return (ENOTDIR); /* overloaded */ 669 if (name[0] >= CTL_DEBUG_MAXID) 670 return (EOPNOTSUPP); 671 cdp = debugvars[name[0]]; 672 if (cdp->debugname == 0) 673 return (EOPNOTSUPP); 674 switch (name[1]) { 675 case CTL_DEBUG_NAME: 676 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 677 case CTL_DEBUG_VALUE: 678 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 679 default: 680 return (EOPNOTSUPP); 681 } 682 /* NOTREACHED */ 683 } 684 #endif /* DEBUG */ 685 686 int 687 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 688 void *newp, size_t newlen, struct proc *p) 689 { 690 struct proc *ptmp = NULL; 691 const struct proclist_desc *pd; 692 int error = 0; 693 struct rlimit alim; 694 struct plimit *newplim; 695 char *tmps = NULL; 696 int i, curlen, len; 697 698 if (namelen < 2) 699 return EINVAL; 700 701 if (name[0] == PROC_CURPROC) { 702 ptmp = p; 703 } else { 704 proclist_lock_read(); 705 for (pd = proclists; pd->pd_list != NULL; pd++) { 706 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 707 ptmp = LIST_NEXT(ptmp, p_list)) { 708 /* Skip embryonic processes. */ 709 if (ptmp->p_stat == SIDL) 710 continue; 711 if (ptmp->p_pid == (pid_t)name[0]) 712 break; 713 } 714 if (ptmp != NULL) 715 break; 716 } 717 proclist_unlock_read(); 718 if (ptmp == NULL) 719 return(ESRCH); 720 if (p->p_ucred->cr_uid != 0) { 721 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 722 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 723 return EPERM; 724 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 725 return EPERM; /* sgid proc */ 726 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 727 if (p->p_ucred->cr_groups[i] == 728 ptmp->p_cred->p_rgid) 729 break; 730 } 731 if (i == p->p_ucred->cr_ngroups) 732 return EPERM; 733 } 734 } 735 if (name[1] == PROC_PID_CORENAME) { 736 if (namelen != 2) 737 return EINVAL; 738 /* 739 * Can't use sysctl_string() here because we may malloc a new 740 * area during the process, so we have to do it by hand. 741 */ 742 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 743 if (oldlenp && *oldlenp < curlen) { 744 if (!oldp) 745 *oldlenp = curlen; 746 return (ENOMEM); 747 } 748 if (newp) { 749 if (securelevel > 2) 750 return EPERM; 751 if (newlen > MAXPATHLEN) 752 return ENAMETOOLONG; 753 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 754 if (tmps == NULL) 755 return ENOMEM; 756 error = copyin(newp, tmps, newlen + 1); 757 tmps[newlen] = '\0'; 758 if (error) 759 goto cleanup; 760 /* Enforce to be either 'core' for end with '.core' */ 761 if (newlen < 4) { /* c.o.r.e */ 762 error = EINVAL; 763 goto cleanup; 764 } 765 len = newlen - 4; 766 if (len > 0) { 767 if (tmps[len - 1] != '.' && 768 tmps[len - 1] != '/') { 769 error = EINVAL; 770 goto cleanup; 771 } 772 } 773 if (strcmp(&tmps[len], "core") != 0) { 774 error = EINVAL; 775 goto cleanup; 776 } 777 } 778 if (oldp && oldlenp) { 779 *oldlenp = curlen; 780 error = copyout(ptmp->p_limit->pl_corename, oldp, 781 curlen); 782 } 783 if (newp && error == 0) { 784 /* if the 2 strings are identical, don't limcopy() */ 785 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 786 error = 0; 787 goto cleanup; 788 } 789 if (ptmp->p_limit->p_refcnt > 1 && 790 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 791 newplim = limcopy(ptmp->p_limit); 792 limfree(ptmp->p_limit); 793 ptmp->p_limit = newplim; 794 } 795 if (ptmp->p_limit->pl_corename != defcorename) { 796 free(ptmp->p_limit->pl_corename, M_TEMP); 797 } 798 ptmp->p_limit->pl_corename = tmps; 799 return (0); 800 } 801 cleanup: 802 if (tmps) 803 free(tmps, M_TEMP); 804 return (error); 805 } 806 if (name[1] == PROC_PID_LIMIT) { 807 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 808 return EINVAL; 809 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 810 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 811 error = sysctl_quad(oldp, oldlenp, newp, newlen, 812 &alim.rlim_max); 813 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 814 error = sysctl_quad(oldp, oldlenp, newp, newlen, 815 &alim.rlim_cur); 816 else 817 error = EINVAL; 818 819 if (error) 820 return error; 821 822 if (newp) 823 error = dosetrlimit(ptmp, p->p_cred, 824 name[2] - 1, &alim); 825 return error; 826 } 827 return (EINVAL); 828 } 829 830 int 831 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 832 void *newp, size_t newlen, struct proc *p) 833 { 834 static struct { 835 const char *name; 836 int type; 837 } emulations[] = CTL_EMUL_NAMES; 838 const struct emul *e; 839 const char *ename; 840 #ifdef LKM 841 extern struct lock exec_lock; /* XXX */ 842 int error; 843 #else 844 extern int nexecs_builtin; 845 extern const struct execsw execsw_builtin[]; 846 int i; 847 #endif 848 849 /* all sysctl names at this level are name and field */ 850 if (namelen < 2) 851 return (ENOTDIR); /* overloaded */ 852 853 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 854 return (EOPNOTSUPP); 855 856 ename = emulations[name[0]].name; 857 858 #ifdef LKM 859 lockmgr(&exec_lock, LK_SHARED, NULL); 860 if ((e = emul_search(ename))) { 861 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 862 newp, newlen, p); 863 } else 864 error = EOPNOTSUPP; 865 lockmgr(&exec_lock, LK_RELEASE, NULL); 866 867 return (error); 868 #else 869 for (i = 0; i < nexecs_builtin; i++) { 870 e = execsw_builtin[i].es_emul; 871 if (e == NULL || strcmp(ename, e->e_name) != 0 || 872 e->e_sysctl != NULL) 873 continue; 874 875 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 876 newp, newlen, p); 877 } 878 879 return (EOPNOTSUPP); 880 #endif 881 } 882 /* 883 * Convenience macros. 884 */ 885 886 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 887 if (oldlenp) { \ 888 if (!oldp) \ 889 *oldlenp = len; \ 890 else { \ 891 if (*oldlenp < len) \ 892 return(ENOMEM); \ 893 *oldlenp = len; \ 894 error = copyout((caddr_t)valp, oldp, len); \ 895 } \ 896 } 897 898 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 899 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 900 901 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 902 if (newp && newlen != len) \ 903 return (EINVAL); 904 905 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 906 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 907 908 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 909 if (error == 0 && newp) \ 910 error = copyin(newp, valp, len); 911 912 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 913 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 914 915 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 916 if (oldlenp) { \ 917 len = strlen(str) + 1; \ 918 if (!oldp) \ 919 *oldlenp = len; \ 920 else { \ 921 if (*oldlenp < len) { \ 922 err2 = ENOMEM; \ 923 len = *oldlenp; \ 924 } else \ 925 *oldlenp = len; \ 926 error = copyout(str, oldp, len);\ 927 if (error == 0) \ 928 error = err2; \ 929 } \ 930 } 931 932 /* 933 * Validate parameters and get old / set new parameters 934 * for an integer-valued sysctl function. 935 */ 936 int 937 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 938 { 939 int error = 0; 940 941 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 942 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 943 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 944 945 return (error); 946 } 947 948 949 /* 950 * As above, but read-only. 951 */ 952 int 953 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 954 { 955 int error = 0; 956 957 if (newp) 958 return (EPERM); 959 960 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 961 962 return (error); 963 } 964 965 /* 966 * Validate parameters and get old / set new parameters 967 * for an quad-valued sysctl function. 968 */ 969 int 970 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 971 quad_t *valp) 972 { 973 int error = 0; 974 975 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 976 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 977 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 978 979 return (error); 980 } 981 982 /* 983 * As above, but read-only. 984 */ 985 int 986 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 987 { 988 int error = 0; 989 990 if (newp) 991 return (EPERM); 992 993 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 994 995 return (error); 996 } 997 998 /* 999 * Validate parameters and get old / set new parameters 1000 * for a string-valued sysctl function. 1001 */ 1002 int 1003 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1004 int maxlen) 1005 { 1006 int len, error = 0, err2 = 0; 1007 1008 if (newp && newlen >= maxlen) 1009 return (EINVAL); 1010 1011 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1012 1013 if (error == 0 && newp) { 1014 error = copyin(newp, str, newlen); 1015 str[newlen] = 0; 1016 } 1017 return (error); 1018 } 1019 1020 /* 1021 * As above, but read-only. 1022 */ 1023 int 1024 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1025 { 1026 int len, error = 0, err2 = 0; 1027 1028 if (newp) 1029 return (EPERM); 1030 1031 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1032 1033 return (error); 1034 } 1035 1036 /* 1037 * Validate parameters and get old / set new parameters 1038 * for a structure oriented sysctl function. 1039 */ 1040 int 1041 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1042 int len) 1043 { 1044 int error = 0; 1045 1046 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1047 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1048 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1049 1050 return (error); 1051 } 1052 1053 /* 1054 * Validate parameters and get old parameters 1055 * for a structure oriented sysctl function. 1056 */ 1057 int 1058 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1059 int len) 1060 { 1061 int error = 0; 1062 1063 if (newp) 1064 return (EPERM); 1065 1066 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1067 1068 return (error); 1069 } 1070 1071 /* 1072 * As above, but can return a truncated result. 1073 */ 1074 int 1075 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1076 int len) 1077 { 1078 int error = 0; 1079 1080 if (newp) 1081 return (EPERM); 1082 1083 len = min(*oldlenp, len); 1084 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1085 1086 return (error); 1087 } 1088 1089 /* 1090 * Get file structures. 1091 */ 1092 static int 1093 sysctl_file(void *vwhere, size_t *sizep) 1094 { 1095 int buflen, error; 1096 struct file *fp; 1097 char *start, *where; 1098 1099 start = where = vwhere; 1100 buflen = *sizep; 1101 if (where == NULL) { 1102 /* 1103 * overestimate by 10 files 1104 */ 1105 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1106 return (0); 1107 } 1108 1109 /* 1110 * first copyout filehead 1111 */ 1112 if (buflen < sizeof(filehead)) { 1113 *sizep = 0; 1114 return (0); 1115 } 1116 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1117 if (error) 1118 return (error); 1119 buflen -= sizeof(filehead); 1120 where += sizeof(filehead); 1121 1122 /* 1123 * followed by an array of file structures 1124 */ 1125 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1126 if (buflen < sizeof(struct file)) { 1127 *sizep = where - start; 1128 return (ENOMEM); 1129 } 1130 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1131 if (error) 1132 return (error); 1133 buflen -= sizeof(struct file); 1134 where += sizeof(struct file); 1135 } 1136 *sizep = where - start; 1137 return (0); 1138 } 1139 1140 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1141 #define FILL_PERM(src, dst) do { \ 1142 (dst)._key = (src)._key; \ 1143 (dst).uid = (src).uid; \ 1144 (dst).gid = (src).gid; \ 1145 (dst).cuid = (src).cuid; \ 1146 (dst).cgid = (src).cgid; \ 1147 (dst).mode = (src).mode; \ 1148 (dst)._seq = (src)._seq; \ 1149 } while (0); 1150 #define FILL_MSG(src, dst) do { \ 1151 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1152 (dst).msg_qnum = (src).msg_qnum; \ 1153 (dst).msg_qbytes = (src).msg_qbytes; \ 1154 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1155 (dst).msg_lspid = (src).msg_lspid; \ 1156 (dst).msg_lrpid = (src).msg_lrpid; \ 1157 (dst).msg_stime = (src).msg_stime; \ 1158 (dst).msg_rtime = (src).msg_rtime; \ 1159 (dst).msg_ctime = (src).msg_ctime; \ 1160 } while (0) 1161 #define FILL_SEM(src, dst) do { \ 1162 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1163 (dst).sem_nsems = (src).sem_nsems; \ 1164 (dst).sem_otime = (src).sem_otime; \ 1165 (dst).sem_ctime = (src).sem_ctime; \ 1166 } while (0) 1167 #define FILL_SHM(src, dst) do { \ 1168 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1169 (dst).shm_segsz = (src).shm_segsz; \ 1170 (dst).shm_lpid = (src).shm_lpid; \ 1171 (dst).shm_cpid = (src).shm_cpid; \ 1172 (dst).shm_atime = (src).shm_atime; \ 1173 (dst).shm_dtime = (src).shm_dtime; \ 1174 (dst).shm_ctime = (src).shm_ctime; \ 1175 (dst).shm_nattch = (src).shm_nattch; \ 1176 } while (0) 1177 1178 static int 1179 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1180 { 1181 #ifdef SYSVMSG 1182 struct msg_sysctl_info *msgsi; 1183 #endif 1184 #ifdef SYSVSEM 1185 struct sem_sysctl_info *semsi; 1186 #endif 1187 #ifdef SYSVSHM 1188 struct shm_sysctl_info *shmsi; 1189 #endif 1190 size_t infosize, dssize, tsize, buflen; 1191 void *buf = NULL; 1192 char *start; 1193 int32_t nds; 1194 int i, error, ret; 1195 1196 if (namelen != 1) 1197 return (EINVAL); 1198 1199 start = where; 1200 buflen = *sizep; 1201 1202 switch (*name) { 1203 case KERN_SYSVIPC_MSG_INFO: 1204 #ifdef SYSVMSG 1205 infosize = sizeof(msgsi->msginfo); 1206 nds = msginfo.msgmni; 1207 dssize = sizeof(msgsi->msgids[0]); 1208 break; 1209 #else 1210 return (EINVAL); 1211 #endif 1212 case KERN_SYSVIPC_SEM_INFO: 1213 #ifdef SYSVSEM 1214 infosize = sizeof(semsi->seminfo); 1215 nds = seminfo.semmni; 1216 dssize = sizeof(semsi->semids[0]); 1217 break; 1218 #else 1219 return (EINVAL); 1220 #endif 1221 case KERN_SYSVIPC_SHM_INFO: 1222 #ifdef SYSVSHM 1223 infosize = sizeof(shmsi->shminfo); 1224 nds = shminfo.shmmni; 1225 dssize = sizeof(shmsi->shmids[0]); 1226 break; 1227 #else 1228 return (EINVAL); 1229 #endif 1230 default: 1231 return (EINVAL); 1232 } 1233 /* 1234 * Round infosize to 64 bit boundary if requesting more than just 1235 * the info structure or getting the total data size. 1236 */ 1237 if (where == NULL || *sizep > infosize) 1238 infosize = ((infosize + 7) / 8) * 8; 1239 tsize = infosize + nds * dssize; 1240 1241 /* Return just the total size required. */ 1242 if (where == NULL) { 1243 *sizep = tsize; 1244 return (0); 1245 } 1246 1247 /* Not enough room for even the info struct. */ 1248 if (buflen < infosize) { 1249 *sizep = 0; 1250 return (ENOMEM); 1251 } 1252 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1253 memset(buf, 0, min(tsize, buflen)); 1254 1255 switch (*name) { 1256 #ifdef SYSVMSG 1257 case KERN_SYSVIPC_MSG_INFO: 1258 msgsi = (struct msg_sysctl_info *)buf; 1259 msgsi->msginfo = msginfo; 1260 break; 1261 #endif 1262 #ifdef SYSVSEM 1263 case KERN_SYSVIPC_SEM_INFO: 1264 semsi = (struct sem_sysctl_info *)buf; 1265 semsi->seminfo = seminfo; 1266 break; 1267 #endif 1268 #ifdef SYSVSHM 1269 case KERN_SYSVIPC_SHM_INFO: 1270 shmsi = (struct shm_sysctl_info *)buf; 1271 shmsi->shminfo = shminfo; 1272 break; 1273 #endif 1274 } 1275 buflen -= infosize; 1276 1277 ret = 0; 1278 if (buflen > 0) { 1279 /* Fill in the IPC data structures. */ 1280 for (i = 0; i < nds; i++) { 1281 if (buflen < dssize) { 1282 ret = ENOMEM; 1283 break; 1284 } 1285 switch (*name) { 1286 #ifdef SYSVMSG 1287 case KERN_SYSVIPC_MSG_INFO: 1288 FILL_MSG(msqids[i], msgsi->msgids[i]); 1289 break; 1290 #endif 1291 #ifdef SYSVSEM 1292 case KERN_SYSVIPC_SEM_INFO: 1293 FILL_SEM(sema[i], semsi->semids[i]); 1294 break; 1295 #endif 1296 #ifdef SYSVSHM 1297 case KERN_SYSVIPC_SHM_INFO: 1298 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1299 break; 1300 #endif 1301 } 1302 buflen -= dssize; 1303 } 1304 } 1305 *sizep -= buflen; 1306 error = copyout(buf, start, *sizep); 1307 /* If copyout succeeded, use return code set earlier. */ 1308 if (error == 0) 1309 error = ret; 1310 if (buf) 1311 free(buf, M_TEMP); 1312 return (error); 1313 } 1314 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1315 1316 static int 1317 sysctl_msgbuf(void *vwhere, size_t *sizep) 1318 { 1319 char *where = vwhere; 1320 size_t len, maxlen = *sizep; 1321 long beg, end; 1322 int error; 1323 1324 /* 1325 * deal with cases where the message buffer has 1326 * become corrupted. 1327 */ 1328 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1329 msgbufenabled = 0; 1330 return (ENXIO); 1331 } 1332 1333 if (where == NULL) { 1334 /* always return full buffer size */ 1335 *sizep = msgbufp->msg_bufs; 1336 return (0); 1337 } 1338 1339 error = 0; 1340 maxlen = min(msgbufp->msg_bufs, maxlen); 1341 1342 /* 1343 * First, copy from the write pointer to the end of 1344 * message buffer. 1345 */ 1346 beg = msgbufp->msg_bufx; 1347 end = msgbufp->msg_bufs; 1348 while (maxlen > 0) { 1349 len = min(end - beg, maxlen); 1350 if (len == 0) 1351 break; 1352 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1353 if (error) 1354 break; 1355 where += len; 1356 maxlen -= len; 1357 1358 /* 1359 * ... then, copy from the beginning of message buffer to 1360 * the write pointer. 1361 */ 1362 beg = 0; 1363 end = msgbufp->msg_bufx; 1364 } 1365 return (error); 1366 } 1367 1368 /* 1369 * try over estimating by 5 procs 1370 */ 1371 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1372 1373 static int 1374 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1375 { 1376 struct eproc eproc; 1377 struct kinfo_proc2 kproc2; 1378 struct kinfo_proc *dp; 1379 struct proc *p; 1380 const struct proclist_desc *pd; 1381 char *where, *dp2; 1382 int type, op, arg, elem_size, elem_count; 1383 int buflen, needed, error; 1384 1385 dp = vwhere; 1386 dp2 = where = vwhere; 1387 buflen = where != NULL ? *sizep : 0; 1388 error = needed = 0; 1389 type = name[0]; 1390 1391 if (type == KERN_PROC) { 1392 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1393 return (EINVAL); 1394 op = name[1]; 1395 if (op != KERN_PROC_ALL) 1396 arg = name[2]; 1397 } else { 1398 if (namelen != 5) 1399 return (EINVAL); 1400 op = name[1]; 1401 arg = name[2]; 1402 elem_size = name[3]; 1403 elem_count = name[4]; 1404 } 1405 1406 proclist_lock_read(); 1407 1408 pd = proclists; 1409 again: 1410 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1411 /* 1412 * Skip embryonic processes. 1413 */ 1414 if (p->p_stat == SIDL) 1415 continue; 1416 /* 1417 * TODO - make more efficient (see notes below). 1418 * do by session. 1419 */ 1420 switch (op) { 1421 1422 case KERN_PROC_PID: 1423 /* could do this with just a lookup */ 1424 if (p->p_pid != (pid_t)arg) 1425 continue; 1426 break; 1427 1428 case KERN_PROC_PGRP: 1429 /* could do this by traversing pgrp */ 1430 if (p->p_pgrp->pg_id != (pid_t)arg) 1431 continue; 1432 break; 1433 1434 case KERN_PROC_SESSION: 1435 if (p->p_session->s_sid != (pid_t)arg) 1436 continue; 1437 break; 1438 1439 case KERN_PROC_TTY: 1440 if (arg == KERN_PROC_TTY_REVOKE) { 1441 if ((p->p_flag & P_CONTROLT) == 0 || 1442 p->p_session->s_ttyp == NULL || 1443 p->p_session->s_ttyvp != NULL) 1444 continue; 1445 } else if ((p->p_flag & P_CONTROLT) == 0 || 1446 p->p_session->s_ttyp == NULL) { 1447 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1448 continue; 1449 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1450 continue; 1451 break; 1452 1453 case KERN_PROC_UID: 1454 if (p->p_ucred->cr_uid != (uid_t)arg) 1455 continue; 1456 break; 1457 1458 case KERN_PROC_RUID: 1459 if (p->p_cred->p_ruid != (uid_t)arg) 1460 continue; 1461 break; 1462 1463 case KERN_PROC_GID: 1464 if (p->p_ucred->cr_gid != (uid_t)arg) 1465 continue; 1466 break; 1467 1468 case KERN_PROC_RGID: 1469 if (p->p_cred->p_rgid != (uid_t)arg) 1470 continue; 1471 break; 1472 1473 case KERN_PROC_ALL: 1474 /* allow everything */ 1475 break; 1476 1477 default: 1478 error = EINVAL; 1479 goto cleanup; 1480 } 1481 if (type == KERN_PROC) { 1482 if (buflen >= sizeof(struct kinfo_proc)) { 1483 fill_eproc(p, &eproc); 1484 error = copyout((caddr_t)p, &dp->kp_proc, 1485 sizeof(struct proc)); 1486 if (error) 1487 goto cleanup; 1488 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1489 sizeof(eproc)); 1490 if (error) 1491 goto cleanup; 1492 dp++; 1493 buflen -= sizeof(struct kinfo_proc); 1494 } 1495 needed += sizeof(struct kinfo_proc); 1496 } else { /* KERN_PROC2 */ 1497 if (buflen >= elem_size && elem_count > 0) { 1498 fill_kproc2(p, &kproc2); 1499 /* 1500 * Copy out elem_size, but not larger than 1501 * the size of a struct kinfo_proc2. 1502 */ 1503 error = copyout(&kproc2, dp2, 1504 min(sizeof(kproc2), elem_size)); 1505 if (error) 1506 goto cleanup; 1507 dp2 += elem_size; 1508 buflen -= elem_size; 1509 elem_count--; 1510 } 1511 needed += elem_size; 1512 } 1513 } 1514 pd++; 1515 if (pd->pd_list != NULL) 1516 goto again; 1517 proclist_unlock_read(); 1518 1519 if (where != NULL) { 1520 if (type == KERN_PROC) 1521 *sizep = (caddr_t)dp - where; 1522 else 1523 *sizep = dp2 - where; 1524 if (needed > *sizep) 1525 return (ENOMEM); 1526 } else { 1527 needed += KERN_PROCSLOP; 1528 *sizep = needed; 1529 } 1530 return (0); 1531 cleanup: 1532 proclist_unlock_read(); 1533 return (error); 1534 } 1535 1536 1537 /* 1538 * try over estimating by 5 LWPs 1539 */ 1540 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1541 1542 static int 1543 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1544 { 1545 struct kinfo_lwp klwp; 1546 struct proc *p; 1547 struct lwp *l; 1548 char *where, *dp; 1549 int type, pid, elem_size, elem_count; 1550 int buflen, needed, error; 1551 1552 dp = where = vwhere; 1553 buflen = where != NULL ? *sizep : 0; 1554 error = needed = 0; 1555 type = name[0]; 1556 1557 if (namelen != 4) 1558 return (EINVAL); 1559 pid = name[1]; 1560 elem_size = name[2]; 1561 elem_count = name[3]; 1562 1563 p = pfind(pid); 1564 if (p == NULL) 1565 return (ESRCH); 1566 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1567 if (buflen >= elem_size && elem_count > 0) { 1568 fill_lwp(l, &klwp); 1569 /* 1570 * Copy out elem_size, but not larger than 1571 * the size of a struct kinfo_proc2. 1572 */ 1573 error = copyout(&klwp, dp, 1574 min(sizeof(klwp), elem_size)); 1575 if (error) 1576 goto cleanup; 1577 dp += elem_size; 1578 buflen -= elem_size; 1579 elem_count--; 1580 } 1581 needed += elem_size; 1582 } 1583 1584 if (where != NULL) { 1585 *sizep = dp - where; 1586 if (needed > *sizep) 1587 return (ENOMEM); 1588 } else { 1589 needed += KERN_PROCSLOP; 1590 *sizep = needed; 1591 } 1592 return (0); 1593 cleanup: 1594 return (error); 1595 } 1596 1597 /* 1598 * Fill in an eproc structure for the specified process. 1599 */ 1600 void 1601 fill_eproc(struct proc *p, struct eproc *ep) 1602 { 1603 struct tty *tp; 1604 struct lwp *l; 1605 1606 ep->e_paddr = p; 1607 ep->e_sess = p->p_session; 1608 ep->e_pcred = *p->p_cred; 1609 ep->e_ucred = *p->p_ucred; 1610 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1611 ep->e_vm.vm_rssize = 0; 1612 ep->e_vm.vm_tsize = 0; 1613 ep->e_vm.vm_dsize = 0; 1614 ep->e_vm.vm_ssize = 0; 1615 /* ep->e_vm.vm_pmap = XXX; */ 1616 } else { 1617 struct vmspace *vm = p->p_vmspace; 1618 1619 ep->e_vm.vm_rssize = vm_resident_count(vm); 1620 ep->e_vm.vm_tsize = vm->vm_tsize; 1621 ep->e_vm.vm_dsize = vm->vm_dsize; 1622 ep->e_vm.vm_ssize = vm->vm_ssize; 1623 1624 /* Pick a "representative" LWP */ 1625 l = proc_representative_lwp(p); 1626 1627 if (l->l_wmesg) 1628 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1629 } 1630 if (p->p_pptr) 1631 ep->e_ppid = p->p_pptr->p_pid; 1632 else 1633 ep->e_ppid = 0; 1634 ep->e_pgid = p->p_pgrp->pg_id; 1635 ep->e_sid = ep->e_sess->s_sid; 1636 ep->e_jobc = p->p_pgrp->pg_jobc; 1637 if ((p->p_flag & P_CONTROLT) && 1638 (tp = ep->e_sess->s_ttyp)) { 1639 ep->e_tdev = tp->t_dev; 1640 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1641 ep->e_tsess = tp->t_session; 1642 } else 1643 ep->e_tdev = NODEV; 1644 1645 ep->e_xsize = ep->e_xrssize = 0; 1646 ep->e_xccount = ep->e_xswrss = 0; 1647 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1648 if (SESS_LEADER(p)) 1649 ep->e_flag |= EPROC_SLEADER; 1650 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1651 } 1652 1653 /* 1654 * Fill in an eproc structure for the specified process. 1655 */ 1656 static void 1657 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1658 { 1659 struct tty *tp; 1660 struct lwp *l; 1661 memset(ki, 0, sizeof(*ki)); 1662 1663 ki->p_paddr = PTRTOINT64(p); 1664 ki->p_fd = PTRTOINT64(p->p_fd); 1665 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1666 ki->p_stats = PTRTOINT64(p->p_stats); 1667 ki->p_limit = PTRTOINT64(p->p_limit); 1668 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1669 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1670 ki->p_sess = PTRTOINT64(p->p_session); 1671 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1672 ki->p_ru = PTRTOINT64(p->p_ru); 1673 1674 ki->p_eflag = 0; 1675 ki->p_exitsig = p->p_exitsig; 1676 ki->p_flag = p->p_flag; 1677 1678 ki->p_pid = p->p_pid; 1679 if (p->p_pptr) 1680 ki->p_ppid = p->p_pptr->p_pid; 1681 else 1682 ki->p_ppid = 0; 1683 ki->p_sid = p->p_session->s_sid; 1684 ki->p__pgid = p->p_pgrp->pg_id; 1685 1686 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1687 1688 ki->p_uid = p->p_ucred->cr_uid; 1689 ki->p_ruid = p->p_cred->p_ruid; 1690 ki->p_gid = p->p_ucred->cr_gid; 1691 ki->p_rgid = p->p_cred->p_rgid; 1692 1693 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1694 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1695 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1696 1697 ki->p_jobc = p->p_pgrp->pg_jobc; 1698 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1699 ki->p_tdev = tp->t_dev; 1700 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1701 ki->p_tsess = PTRTOINT64(tp->t_session); 1702 } else { 1703 ki->p_tdev = NODEV; 1704 } 1705 1706 ki->p_estcpu = p->p_estcpu; 1707 ki->p_rtime_sec = p->p_rtime.tv_sec; 1708 ki->p_rtime_usec = p->p_rtime.tv_usec; 1709 ki->p_cpticks = p->p_cpticks; 1710 ki->p_pctcpu = p->p_pctcpu; 1711 1712 ki->p_uticks = p->p_uticks; 1713 ki->p_sticks = p->p_sticks; 1714 ki->p_iticks = p->p_iticks; 1715 1716 ki->p_tracep = PTRTOINT64(p->p_tracep); 1717 ki->p_traceflag = p->p_traceflag; 1718 1719 1720 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1721 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1722 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1723 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1724 1725 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1726 ki->p_realstat = p->p_stat; 1727 ki->p_nice = p->p_nice; 1728 1729 ki->p_xstat = p->p_xstat; 1730 ki->p_acflag = p->p_acflag; 1731 1732 strncpy(ki->p_comm, p->p_comm, 1733 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1734 1735 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1736 1737 ki->p_nlwps = p->p_nlwps; 1738 ki->p_nrlwps = p->p_nrlwps; 1739 ki->p_realflag = p->p_flag; 1740 1741 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1742 ki->p_vm_rssize = 0; 1743 ki->p_vm_tsize = 0; 1744 ki->p_vm_dsize = 0; 1745 ki->p_vm_ssize = 0; 1746 l = NULL; 1747 } else { 1748 struct vmspace *vm = p->p_vmspace; 1749 1750 ki->p_vm_rssize = vm_resident_count(vm); 1751 ki->p_vm_tsize = vm->vm_tsize; 1752 ki->p_vm_dsize = vm->vm_dsize; 1753 ki->p_vm_ssize = vm->vm_ssize; 1754 1755 /* Pick a "representative" LWP */ 1756 l = proc_representative_lwp(p); 1757 ki->p_forw = PTRTOINT64(l->l_forw); 1758 ki->p_back = PTRTOINT64(l->l_back); 1759 ki->p_addr = PTRTOINT64(l->l_addr); 1760 ki->p_stat = l->l_stat; 1761 ki->p_flag |= l->l_flag; 1762 ki->p_swtime = l->l_swtime; 1763 ki->p_slptime = l->l_slptime; 1764 if (l->l_stat == LSONPROC) { 1765 KDASSERT(l->l_cpu != NULL); 1766 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1767 } else 1768 ki->p_schedflags = 0; 1769 ki->p_holdcnt = l->l_holdcnt; 1770 ki->p_priority = l->l_priority; 1771 ki->p_usrpri = l->l_usrpri; 1772 if (l->l_wmesg) 1773 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1774 ki->p_wchan = PTRTOINT64(l->l_wchan); 1775 1776 } 1777 1778 if (p->p_session->s_ttyvp) 1779 ki->p_eflag |= EPROC_CTTY; 1780 if (SESS_LEADER(p)) 1781 ki->p_eflag |= EPROC_SLEADER; 1782 1783 /* XXX Is this double check necessary? */ 1784 if (P_ZOMBIE(p)) { 1785 ki->p_uvalid = 0; 1786 } else { 1787 ki->p_uvalid = 1; 1788 1789 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1790 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1791 1792 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1793 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1794 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1795 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1796 1797 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1798 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1799 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1800 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1801 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1802 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1803 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1804 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1805 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1806 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1807 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1808 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1809 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1810 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1811 1812 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1813 p->p_stats->p_cru.ru_stime.tv_sec; 1814 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1815 p->p_stats->p_cru.ru_stime.tv_usec; 1816 } 1817 #ifdef MULTIPROCESSOR 1818 if (l && l->l_cpu != NULL) 1819 ki->p_cpuid = l->l_cpu->ci_cpuid; 1820 else 1821 #endif 1822 ki->p_cpuid = KI_NOCPU; 1823 1824 } 1825 1826 /* 1827 * Fill in a kinfo_lwp structure for the specified lwp. 1828 */ 1829 static void 1830 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1831 { 1832 kl->l_forw = PTRTOINT64(l->l_forw); 1833 kl->l_back = PTRTOINT64(l->l_back); 1834 kl->l_laddr = PTRTOINT64(l); 1835 kl->l_addr = PTRTOINT64(l->l_addr); 1836 kl->l_stat = l->l_stat; 1837 kl->l_lid = l->l_lid; 1838 kl->l_flag = l->l_flag; 1839 1840 kl->l_swtime = l->l_swtime; 1841 kl->l_slptime = l->l_slptime; 1842 if (l->l_stat == LSONPROC) { 1843 KDASSERT(l->l_cpu != NULL); 1844 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1845 } else 1846 kl->l_schedflags = 0; 1847 kl->l_holdcnt = l->l_holdcnt; 1848 kl->l_priority = l->l_priority; 1849 kl->l_usrpri = l->l_usrpri; 1850 if (l->l_wmesg) 1851 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1852 kl->l_wchan = PTRTOINT64(l->l_wchan); 1853 #ifdef MULTIPROCESSOR 1854 if (l->l_cpu != NULL) 1855 kl->l_cpuid = l->l_cpu->ci_cpuid; 1856 else 1857 #endif 1858 kl->l_cpuid = KI_NOCPU; 1859 } 1860 1861 int 1862 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1863 struct proc *up) 1864 { 1865 struct ps_strings pss; 1866 struct proc *p; 1867 size_t len, upper_bound, xlen; 1868 struct uio auio; 1869 struct iovec aiov; 1870 vaddr_t argv; 1871 pid_t pid; 1872 int nargv, type, error, i; 1873 char *arg; 1874 char *tmp; 1875 1876 if (namelen != 2) 1877 return (EINVAL); 1878 pid = name[0]; 1879 type = name[1]; 1880 1881 switch (type) { 1882 case KERN_PROC_ARGV: 1883 case KERN_PROC_NARGV: 1884 case KERN_PROC_ENV: 1885 case KERN_PROC_NENV: 1886 /* ok */ 1887 break; 1888 default: 1889 return (EINVAL); 1890 } 1891 1892 /* check pid */ 1893 if ((p = pfind(pid)) == NULL) 1894 return (EINVAL); 1895 1896 /* only root or same user change look at the environment */ 1897 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1898 if (up->p_ucred->cr_uid != 0) { 1899 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1900 up->p_cred->p_ruid != p->p_cred->p_svuid) 1901 return (EPERM); 1902 } 1903 } 1904 1905 if (sizep != NULL && where == NULL) { 1906 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1907 *sizep = sizeof (int); 1908 else 1909 *sizep = ARG_MAX; /* XXX XXX XXX */ 1910 return (0); 1911 } 1912 if (where == NULL || sizep == NULL) 1913 return (EINVAL); 1914 1915 /* 1916 * Zombies don't have a stack, so we can't read their psstrings. 1917 * System processes also don't have a user stack. 1918 */ 1919 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1920 return (EINVAL); 1921 1922 /* 1923 * Lock the process down in memory. 1924 */ 1925 /* XXXCDC: how should locking work here? */ 1926 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1927 return (EFAULT); 1928 1929 p->p_vmspace->vm_refcnt++; /* XXX */ 1930 1931 /* 1932 * Allocate a temporary buffer to hold the arguments. 1933 */ 1934 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1935 1936 /* 1937 * Read in the ps_strings structure. 1938 */ 1939 aiov.iov_base = &pss; 1940 aiov.iov_len = sizeof(pss); 1941 auio.uio_iov = &aiov; 1942 auio.uio_iovcnt = 1; 1943 auio.uio_offset = (vaddr_t)p->p_psstr; 1944 auio.uio_resid = sizeof(pss); 1945 auio.uio_segflg = UIO_SYSSPACE; 1946 auio.uio_rw = UIO_READ; 1947 auio.uio_procp = NULL; 1948 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1949 if (error) 1950 goto done; 1951 1952 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1953 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1954 else 1955 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1956 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1957 error = copyout(&nargv, where, sizeof(nargv)); 1958 *sizep = sizeof(nargv); 1959 goto done; 1960 } 1961 /* 1962 * Now read the address of the argument vector. 1963 */ 1964 switch (type) { 1965 case KERN_PROC_ARGV: 1966 /* XXX compat32 stuff here */ 1967 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1968 break; 1969 case KERN_PROC_ENV: 1970 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1971 break; 1972 default: 1973 return (EINVAL); 1974 } 1975 auio.uio_offset = (off_t)(long)tmp; 1976 aiov.iov_base = &argv; 1977 aiov.iov_len = sizeof(argv); 1978 auio.uio_iov = &aiov; 1979 auio.uio_iovcnt = 1; 1980 auio.uio_resid = sizeof(argv); 1981 auio.uio_segflg = UIO_SYSSPACE; 1982 auio.uio_rw = UIO_READ; 1983 auio.uio_procp = NULL; 1984 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1985 if (error) 1986 goto done; 1987 1988 /* 1989 * Now copy in the actual argument vector, one page at a time, 1990 * since we don't know how long the vector is (though, we do 1991 * know how many NUL-terminated strings are in the vector). 1992 */ 1993 len = 0; 1994 upper_bound = *sizep; 1995 for (; nargv != 0 && len < upper_bound; len += xlen) { 1996 aiov.iov_base = arg; 1997 aiov.iov_len = PAGE_SIZE; 1998 auio.uio_iov = &aiov; 1999 auio.uio_iovcnt = 1; 2000 auio.uio_offset = argv + len; 2001 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2002 auio.uio_resid = xlen; 2003 auio.uio_segflg = UIO_SYSSPACE; 2004 auio.uio_rw = UIO_READ; 2005 auio.uio_procp = NULL; 2006 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2007 if (error) 2008 goto done; 2009 2010 for (i = 0; i < xlen && nargv != 0; i++) { 2011 if (arg[i] == '\0') 2012 nargv--; /* one full string */ 2013 } 2014 2015 /* make sure we don't copyout past the end of the user's buffer */ 2016 if (len + i > upper_bound) 2017 i = upper_bound - len; 2018 2019 error = copyout(arg, (char *)where + len, i); 2020 if (error) 2021 break; 2022 2023 if (nargv == 0) { 2024 len += i; 2025 break; 2026 } 2027 } 2028 *sizep = len; 2029 2030 done: 2031 uvmspace_free(p->p_vmspace); 2032 2033 free(arg, M_TEMP); 2034 return (error); 2035 } 2036 2037 #if NPTY > 0 2038 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2039 2040 /* 2041 * Validate parameters and get old / set new parameters 2042 * for pty sysctl function. 2043 */ 2044 static int 2045 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2046 { 2047 int error = 0; 2048 int oldmax = 0, newmax = 0; 2049 2050 /* get current value of maxptys */ 2051 oldmax = pty_maxptys(0, 0); 2052 2053 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2054 2055 if (!error && newp) { 2056 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2057 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2058 2059 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2060 return (EINVAL); 2061 2062 } 2063 2064 return (error); 2065 } 2066 #endif /* NPTY > 0 */ 2067 2068 static int 2069 sysctl_dotkstat(name, namelen, where, sizep, newp) 2070 int *name; 2071 u_int namelen; 2072 void *where; 2073 size_t *sizep; 2074 void *newp; 2075 { 2076 /* all sysctl names at this level are terminal */ 2077 if (namelen != 1) 2078 return (ENOTDIR); /* overloaded */ 2079 2080 switch (name[0]) { 2081 case KERN_TKSTAT_NIN: 2082 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2083 case KERN_TKSTAT_NOUT: 2084 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2085 case KERN_TKSTAT_CANCC: 2086 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2087 case KERN_TKSTAT_RAWCC: 2088 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2089 default: 2090 return (EOPNOTSUPP); 2091 } 2092 } 2093
Indexes created Tue Sep 30 06:09:59 GMT 2025