kern_sysctl.c revision 1.86.2.19
1 /* $NetBSD: kern_sysctl.c,v 1.86.2.19 2002/06/20 03:47:17 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 1.86.2.19 2002/06/20 03:47:17 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/lwp.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 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 108 109 static int sysctl_file(void *, size_t *); 110 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 111 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 112 #endif 113 static int sysctl_msgbuf(void *, size_t *); 114 static int sysctl_doeproc(int *, u_int, void *, size_t *); 115 static int sysctl_dolwp(int *, u_int, void *, size_t *); 116 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 117 #ifdef MULTIPROCESSOR 118 static int sysctl_docptime(void *, size_t *, void *); 119 static int sysctl_ncpus(void); 120 #endif 121 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 122 static void fill_lwp(struct lwp *, struct kinfo_lwp *); 123 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 124 #if NPTY > 0 125 static int sysctl_pty(void *, size_t *, void *, size_t); 126 #endif 127 128 /* 129 * The `sysctl_memlock' is intended to keep too many processes from 130 * locking down memory by doing sysctls at once. Whether or not this 131 * is really a good idea to worry about it probably a subject of some 132 * debate. 133 */ 134 struct lock sysctl_memlock; 135 136 void 137 sysctl_init(void) 138 { 139 140 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 141 } 142 143 int 144 sys___sysctl(struct lwp *l, void *v, register_t *retval) 145 { 146 struct sys___sysctl_args /* { 147 syscallarg(int *) name; 148 syscallarg(u_int) namelen; 149 syscallarg(void *) old; 150 syscallarg(size_t *) oldlenp; 151 syscallarg(void *) new; 152 syscallarg(size_t) newlen; 153 } */ *uap = v; 154 struct proc *p = l->l_proc; 155 int error; 156 size_t savelen = 0, oldlen = 0; 157 sysctlfn *fn; 158 int name[CTL_MAXNAME]; 159 size_t *oldlenp; 160 161 /* 162 * all top-level sysctl names are non-terminal 163 */ 164 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 165 return (EINVAL); 166 error = copyin(SCARG(uap, name), &name, 167 SCARG(uap, namelen) * sizeof(int)); 168 if (error) 169 return (error); 170 171 /* 172 * For all but CTL_PROC, must be root to change a value. 173 * For CTL_PROC, must be root, or owner of the proc (and not suid), 174 * this is checked in proc_sysctl() (once we know the targer proc). 175 */ 176 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 177 (error = suser(p->p_ucred, &p->p_acflag))) 178 return error; 179 180 switch (name[0]) { 181 case CTL_KERN: 182 fn = kern_sysctl; 183 break; 184 case CTL_HW: 185 fn = hw_sysctl; 186 break; 187 case CTL_VM: 188 fn = uvm_sysctl; 189 break; 190 case CTL_NET: 191 fn = net_sysctl; 192 break; 193 case CTL_VFS: 194 fn = vfs_sysctl; 195 break; 196 case CTL_MACHDEP: 197 fn = cpu_sysctl; 198 break; 199 #ifdef DEBUG 200 case CTL_DEBUG: 201 fn = debug_sysctl; 202 break; 203 #endif 204 #ifdef DDB 205 case CTL_DDB: 206 fn = ddb_sysctl; 207 break; 208 #endif 209 case CTL_PROC: 210 fn = proc_sysctl; 211 break; 212 213 case CTL_EMUL: 214 fn = emul_sysctl; 215 break; 216 default: 217 return (EOPNOTSUPP); 218 } 219 220 /* 221 * XXX Hey, we wire `old', but what about `new'? 222 */ 223 224 oldlenp = SCARG(uap, oldlenp); 225 if (oldlenp) { 226 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 227 return (error); 228 oldlenp = &oldlen; 229 } 230 if (SCARG(uap, old) != NULL) { 231 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 232 if (error) 233 return (error); 234 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 235 if (error) { 236 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 237 return error; 238 } 239 savelen = oldlen; 240 } 241 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 242 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 243 if (SCARG(uap, old) != NULL) { 244 uvm_vsunlock(p, SCARG(uap, old), savelen); 245 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 246 } 247 if (error) 248 return (error); 249 if (SCARG(uap, oldlenp)) 250 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 251 return (error); 252 } 253 254 /* 255 * Attributes stored in the kernel. 256 */ 257 char hostname[MAXHOSTNAMELEN]; 258 int hostnamelen; 259 260 char domainname[MAXHOSTNAMELEN]; 261 int domainnamelen; 262 263 long hostid; 264 265 #ifdef INSECURE 266 int securelevel = -1; 267 #else 268 int securelevel = 0; 269 #endif 270 271 #ifndef DEFCORENAME 272 #define DEFCORENAME "%n.core" 273 #endif 274 char defcorename[MAXPATHLEN] = DEFCORENAME; 275 int defcorenamelen = sizeof(DEFCORENAME); 276 277 extern int kern_logsigexit; 278 extern fixpt_t ccpu; 279 280 #ifndef MULTIPROCESSOR 281 #define sysctl_ncpus() 1 282 #endif 283 284 #ifdef MULTIPROCESSOR 285 286 #ifndef CPU_INFO_FOREACH 287 #define CPU_INFO_ITERATOR int 288 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 289 #endif 290 291 static int 292 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 293 { 294 u_int64_t cp_time[CPUSTATES]; 295 int i; 296 struct cpu_info *ci; 297 CPU_INFO_ITERATOR cii; 298 299 for (i=0; i<CPUSTATES; i++) 300 cp_time[i] = 0; 301 302 for (CPU_INFO_FOREACH(cii, ci)) { 303 for (i=0; i<CPUSTATES; i++) 304 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 305 } 306 return (sysctl_rdstruct(oldp, oldlenp, newp, 307 cp_time, sizeof(cp_time))); 308 } 309 310 static int 311 sysctl_ncpus(void) 312 { 313 struct cpu_info *ci; 314 CPU_INFO_ITERATOR cii; 315 316 int ncpus = 0; 317 for (CPU_INFO_FOREACH(cii, ci)) 318 ncpus++; 319 return ncpus; 320 } 321 322 #endif 323 324 /* 325 * kernel related system variables. 326 */ 327 int 328 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 329 void *newp, size_t newlen, struct proc *p) 330 { 331 int error, level, inthostid; 332 int old_autonicetime; 333 int old_vnodes; 334 dev_t consdev; 335 336 /* All sysctl names at this level, except for a few, are terminal. */ 337 switch (name[0]) { 338 case KERN_PROC: 339 case KERN_PROC2: 340 case KERN_LWP: 341 case KERN_PROF: 342 case KERN_MBUF: 343 case KERN_PROC_ARGS: 344 case KERN_SYSVIPC_INFO: 345 case KERN_PIPE: 346 case KERN_TKSTAT: 347 /* Not terminal. */ 348 break; 349 default: 350 if (namelen != 1) 351 return (ENOTDIR); /* overloaded */ 352 } 353 354 switch (name[0]) { 355 case KERN_OSTYPE: 356 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 357 case KERN_OSRELEASE: 358 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 359 case KERN_OSREV: 360 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 361 case KERN_VERSION: 362 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 363 case KERN_MAXVNODES: 364 old_vnodes = desiredvnodes; 365 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 366 if (newp && !error) { 367 if (old_vnodes > desiredvnodes) { 368 desiredvnodes = old_vnodes; 369 return (EINVAL); 370 } 371 vfs_reinit(); 372 nchreinit(); 373 } 374 return (error); 375 case KERN_MAXPROC: 376 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 377 case KERN_MAXFILES: 378 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 379 case KERN_ARGMAX: 380 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 381 case KERN_SECURELVL: 382 level = securelevel; 383 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 384 newp == NULL) 385 return (error); 386 if (level < securelevel && p->p_pid != 1) 387 return (EPERM); 388 securelevel = level; 389 return (0); 390 case KERN_HOSTNAME: 391 error = sysctl_string(oldp, oldlenp, newp, newlen, 392 hostname, sizeof(hostname)); 393 if (newp && !error) 394 hostnamelen = newlen; 395 return (error); 396 case KERN_DOMAINNAME: 397 error = sysctl_string(oldp, oldlenp, newp, newlen, 398 domainname, sizeof(domainname)); 399 if (newp && !error) 400 domainnamelen = newlen; 401 return (error); 402 case KERN_HOSTID: 403 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 404 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 405 if (newp && !error) 406 hostid = inthostid; 407 return (error); 408 case KERN_CLOCKRATE: 409 return (sysctl_clockrate(oldp, oldlenp)); 410 case KERN_BOOTTIME: 411 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 412 sizeof(struct timeval))); 413 case KERN_VNODE: 414 return (sysctl_vnode(oldp, oldlenp, p)); 415 case KERN_PROC: 416 case KERN_PROC2: 417 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 418 case KERN_LWP: 419 return (sysctl_dolwp(name, namelen, oldp, oldlenp)); 420 case KERN_PROC_ARGS: 421 return (sysctl_procargs(name + 1, namelen - 1, 422 oldp, oldlenp, p)); 423 case KERN_FILE: 424 return (sysctl_file(oldp, oldlenp)); 425 #ifdef GPROF 426 case KERN_PROF: 427 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 428 newp, newlen)); 429 #endif 430 case KERN_POSIX1: 431 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 432 case KERN_NGROUPS: 433 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 434 case KERN_JOB_CONTROL: 435 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 436 case KERN_SAVED_IDS: 437 #ifdef _POSIX_SAVED_IDS 438 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 439 #else 440 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 441 #endif 442 case KERN_MAXPARTITIONS: 443 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 444 case KERN_RAWPARTITION: 445 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 446 #ifdef NTP 447 case KERN_NTPTIME: 448 return (sysctl_ntptime(oldp, oldlenp)); 449 #endif 450 case KERN_AUTONICETIME: 451 old_autonicetime = autonicetime; 452 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 453 if (autonicetime < 0) 454 autonicetime = old_autonicetime; 455 return (error); 456 case KERN_AUTONICEVAL: 457 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 458 if (autoniceval < PRIO_MIN) 459 autoniceval = PRIO_MIN; 460 if (autoniceval > PRIO_MAX) 461 autoniceval = PRIO_MAX; 462 return (error); 463 case KERN_RTC_OFFSET: 464 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 465 case KERN_ROOT_DEVICE: 466 return (sysctl_rdstring(oldp, oldlenp, newp, 467 root_device->dv_xname)); 468 case KERN_MSGBUFSIZE: 469 /* 470 * deal with cases where the message buffer has 471 * become corrupted. 472 */ 473 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 474 msgbufenabled = 0; 475 return (ENXIO); 476 } 477 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 478 case KERN_FSYNC: 479 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 480 case KERN_SYSVMSG: 481 #ifdef SYSVMSG 482 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 483 #else 484 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 485 #endif 486 case KERN_SYSVSEM: 487 #ifdef SYSVSEM 488 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 489 #else 490 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 491 #endif 492 case KERN_SYSVSHM: 493 #ifdef SYSVSHM 494 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 495 #else 496 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 497 #endif 498 case KERN_DEFCORENAME: 499 if (newp && newlen < 1) 500 return (EINVAL); 501 error = sysctl_string(oldp, oldlenp, newp, newlen, 502 defcorename, sizeof(defcorename)); 503 if (newp && !error) 504 defcorenamelen = newlen; 505 return (error); 506 case KERN_SYNCHRONIZED_IO: 507 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 508 case KERN_IOV_MAX: 509 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 510 case KERN_MBUF: 511 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 512 newp, newlen)); 513 case KERN_MAPPED_FILES: 514 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 515 case KERN_MEMLOCK: 516 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 517 case KERN_MEMLOCK_RANGE: 518 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 519 case KERN_MEMORY_PROTECTION: 520 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 521 case KERN_LOGIN_NAME_MAX: 522 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 523 case KERN_LOGSIGEXIT: 524 return (sysctl_int(oldp, oldlenp, newp, newlen, 525 &kern_logsigexit)); 526 case KERN_FSCALE: 527 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 528 case KERN_CCPU: 529 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 530 case KERN_CP_TIME: 531 #ifndef MULTIPROCESSOR 532 return (sysctl_rdstruct(oldp, oldlenp, newp, 533 curcpu()->ci_schedstate.spc_cp_time, 534 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 535 #else 536 return (sysctl_docptime(oldp, oldlenp, newp)); 537 #endif 538 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 539 case KERN_SYSVIPC_INFO: 540 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 541 #endif 542 case KERN_MSGBUF: 543 return (sysctl_msgbuf(oldp, oldlenp)); 544 case KERN_CONSDEV: 545 if (cn_tab != NULL) 546 consdev = cn_tab->cn_dev; 547 else 548 consdev = NODEV; 549 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 550 sizeof consdev)); 551 #if NPTY > 0 552 case KERN_MAXPTYS: 553 return sysctl_pty(oldp, oldlenp, newp, newlen); 554 #endif 555 #ifndef PIPE_SOCKETPAIR 556 case KERN_PIPE: 557 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 558 newp, newlen)); 559 #endif 560 case KERN_MAXPHYS: 561 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 562 case KERN_SBMAX: 563 { 564 int new_sbmax = sb_max; 565 566 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 567 if (newp && !error) { 568 if (new_sbmax < (16 * 1024)) /* sanity */ 569 return (EINVAL); 570 sb_max = new_sbmax; 571 } 572 return (error); 573 } 574 case KERN_TKSTAT: 575 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 576 newp)); 577 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 578 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 579 default: 580 return (EOPNOTSUPP); 581 } 582 /* NOTREACHED */ 583 } 584 585 /* 586 * hardware related system variables. 587 */ 588 int 589 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 590 void *newp, size_t newlen, struct proc *p) 591 { 592 593 /* All sysctl names at this level, except for a few, are terminal. */ 594 switch (name[0]) { 595 case HW_DISKSTATS: 596 /* Not terminal. */ 597 break; 598 default: 599 if (namelen != 1) 600 return (ENOTDIR); /* overloaded */ 601 } 602 603 switch (name[0]) { 604 case HW_MACHINE: 605 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 606 case HW_MACHINE_ARCH: 607 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 608 case HW_MODEL: 609 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 610 case HW_NCPU: 611 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 612 case HW_BYTEORDER: 613 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 614 case HW_PHYSMEM: 615 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 616 case HW_USERMEM: 617 return (sysctl_rdint(oldp, oldlenp, newp, 618 ctob(physmem - uvmexp.wired))); 619 case HW_PAGESIZE: 620 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 621 case HW_ALIGNBYTES: 622 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 623 case HW_DISKNAMES: 624 return (sysctl_disknames(oldp, oldlenp)); 625 case HW_DISKSTATS: 626 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 627 case HW_CNMAGIC: { 628 char magic[CNS_LEN]; 629 int error; 630 631 if (oldp) 632 cn_get_magic(magic, CNS_LEN); 633 error = sysctl_string(oldp, oldlenp, newp, newlen, 634 magic, sizeof(magic)); 635 if (newp && !error) { 636 error = cn_set_magic(magic); 637 } 638 return (error); 639 } 640 default: 641 return (EOPNOTSUPP); 642 } 643 /* NOTREACHED */ 644 } 645 646 #ifdef DEBUG 647 /* 648 * Debugging related system variables. 649 */ 650 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 651 struct ctldebug debug5, debug6, debug7, debug8, debug9; 652 struct ctldebug debug10, debug11, debug12, debug13, debug14; 653 struct ctldebug debug15, debug16, debug17, debug18, debug19; 654 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 655 &debug0, &debug1, &debug2, &debug3, &debug4, 656 &debug5, &debug6, &debug7, &debug8, &debug9, 657 &debug10, &debug11, &debug12, &debug13, &debug14, 658 &debug15, &debug16, &debug17, &debug18, &debug19, 659 }; 660 661 int 662 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 663 void *newp, size_t newlen, struct proc *p) 664 { 665 struct ctldebug *cdp; 666 667 /* all sysctl names at this level are name and field */ 668 if (namelen != 2) 669 return (ENOTDIR); /* overloaded */ 670 if (name[0] >= CTL_DEBUG_MAXID) 671 return (EOPNOTSUPP); 672 cdp = debugvars[name[0]]; 673 if (cdp->debugname == 0) 674 return (EOPNOTSUPP); 675 switch (name[1]) { 676 case CTL_DEBUG_NAME: 677 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 678 case CTL_DEBUG_VALUE: 679 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 680 default: 681 return (EOPNOTSUPP); 682 } 683 /* NOTREACHED */ 684 } 685 #endif /* DEBUG */ 686 687 int 688 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 689 void *newp, size_t newlen, struct proc *p) 690 { 691 struct proc *ptmp = NULL; 692 const struct proclist_desc *pd; 693 int error = 0; 694 struct rlimit alim; 695 struct plimit *newplim; 696 char *tmps = NULL; 697 int i, curlen, len; 698 699 if (namelen < 2) 700 return EINVAL; 701 702 if (name[0] == PROC_CURPROC) { 703 ptmp = p; 704 } else { 705 proclist_lock_read(); 706 for (pd = proclists; pd->pd_list != NULL; pd++) { 707 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 708 ptmp = LIST_NEXT(ptmp, p_list)) { 709 /* Skip embryonic processes. */ 710 if (ptmp->p_stat == SIDL) 711 continue; 712 if (ptmp->p_pid == (pid_t)name[0]) 713 break; 714 } 715 if (ptmp != NULL) 716 break; 717 } 718 proclist_unlock_read(); 719 if (ptmp == NULL) 720 return(ESRCH); 721 if (p->p_ucred->cr_uid != 0) { 722 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 723 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 724 return EPERM; 725 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 726 return EPERM; /* sgid proc */ 727 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 728 if (p->p_ucred->cr_groups[i] == 729 ptmp->p_cred->p_rgid) 730 break; 731 } 732 if (i == p->p_ucred->cr_ngroups) 733 return EPERM; 734 } 735 } 736 if (name[1] == PROC_PID_CORENAME) { 737 if (namelen != 2) 738 return EINVAL; 739 /* 740 * Can't use sysctl_string() here because we may malloc a new 741 * area during the process, so we have to do it by hand. 742 */ 743 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 744 if (oldlenp && *oldlenp < curlen) { 745 if (!oldp) 746 *oldlenp = curlen; 747 return (ENOMEM); 748 } 749 if (newp) { 750 if (securelevel > 2) 751 return EPERM; 752 if (newlen > MAXPATHLEN) 753 return ENAMETOOLONG; 754 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 755 if (tmps == NULL) 756 return ENOMEM; 757 error = copyin(newp, tmps, newlen + 1); 758 tmps[newlen] = '\0'; 759 if (error) 760 goto cleanup; 761 /* Enforce to be either 'core' for end with '.core' */ 762 if (newlen < 4) { /* c.o.r.e */ 763 error = EINVAL; 764 goto cleanup; 765 } 766 len = newlen - 4; 767 if (len > 0) { 768 if (tmps[len - 1] != '.' && 769 tmps[len - 1] != '/') { 770 error = EINVAL; 771 goto cleanup; 772 } 773 } 774 if (strcmp(&tmps[len], "core") != 0) { 775 error = EINVAL; 776 goto cleanup; 777 } 778 } 779 if (oldp && oldlenp) { 780 *oldlenp = curlen; 781 error = copyout(ptmp->p_limit->pl_corename, oldp, 782 curlen); 783 } 784 if (newp && error == 0) { 785 /* if the 2 strings are identical, don't limcopy() */ 786 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 787 error = 0; 788 goto cleanup; 789 } 790 if (ptmp->p_limit->p_refcnt > 1 && 791 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 792 newplim = limcopy(ptmp->p_limit); 793 limfree(ptmp->p_limit); 794 ptmp->p_limit = newplim; 795 } 796 if (ptmp->p_limit->pl_corename != defcorename) { 797 free(ptmp->p_limit->pl_corename, M_TEMP); 798 } 799 ptmp->p_limit->pl_corename = tmps; 800 return (0); 801 } 802 cleanup: 803 if (tmps) 804 free(tmps, M_TEMP); 805 return (error); 806 } 807 if (name[1] == PROC_PID_LIMIT) { 808 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 809 return EINVAL; 810 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 811 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 812 error = sysctl_quad(oldp, oldlenp, newp, newlen, 813 &alim.rlim_max); 814 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 815 error = sysctl_quad(oldp, oldlenp, newp, newlen, 816 &alim.rlim_cur); 817 else 818 error = EINVAL; 819 820 if (error) 821 return error; 822 823 if (newp) 824 error = dosetrlimit(ptmp, p->p_cred, 825 name[2] - 1, &alim); 826 return error; 827 } 828 return (EINVAL); 829 } 830 831 int 832 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 833 void *newp, size_t newlen, struct proc *p) 834 { 835 static struct { 836 const char *name; 837 int type; 838 } emulations[] = CTL_EMUL_NAMES; 839 const struct emul *e; 840 const char *ename; 841 #ifdef LKM 842 extern struct lock exec_lock; /* XXX */ 843 int error; 844 #else 845 extern int nexecs_builtin; 846 extern const struct execsw execsw_builtin[]; 847 int i; 848 #endif 849 850 /* all sysctl names at this level are name and field */ 851 if (namelen < 2) 852 return (ENOTDIR); /* overloaded */ 853 854 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 855 return (EOPNOTSUPP); 856 857 ename = emulations[name[0]].name; 858 859 #ifdef LKM 860 lockmgr(&exec_lock, LK_SHARED, NULL); 861 if ((e = emul_search(ename))) { 862 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 863 newp, newlen, p); 864 } else 865 error = EOPNOTSUPP; 866 lockmgr(&exec_lock, LK_RELEASE, NULL); 867 868 return (error); 869 #else 870 for (i = 0; i < nexecs_builtin; i++) { 871 e = execsw_builtin[i].es_emul; 872 if (e == NULL || strcmp(ename, e->e_name) != 0 || 873 e->e_sysctl != NULL) 874 continue; 875 876 return (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 877 newp, newlen, p); 878 } 879 880 return (EOPNOTSUPP); 881 #endif 882 } 883 /* 884 * Convenience macros. 885 */ 886 887 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 888 if (oldlenp) { \ 889 if (!oldp) \ 890 *oldlenp = len; \ 891 else { \ 892 if (*oldlenp < len) \ 893 return(ENOMEM); \ 894 *oldlenp = len; \ 895 error = copyout((caddr_t)valp, oldp, len); \ 896 } \ 897 } 898 899 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 900 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 901 902 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 903 if (newp && newlen != len) \ 904 return (EINVAL); 905 906 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 907 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 908 909 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 910 if (error == 0 && newp) \ 911 error = copyin(newp, valp, len); 912 913 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 914 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 915 916 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 917 if (oldlenp) { \ 918 len = strlen(str) + 1; \ 919 if (!oldp) \ 920 *oldlenp = len; \ 921 else { \ 922 if (*oldlenp < len) { \ 923 err2 = ENOMEM; \ 924 len = *oldlenp; \ 925 } else \ 926 *oldlenp = len; \ 927 error = copyout(str, oldp, len);\ 928 if (error == 0) \ 929 error = err2; \ 930 } \ 931 } 932 933 /* 934 * Validate parameters and get old / set new parameters 935 * for an integer-valued sysctl function. 936 */ 937 int 938 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 939 { 940 int error = 0; 941 942 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 943 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 944 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 945 946 return (error); 947 } 948 949 950 /* 951 * As above, but read-only. 952 */ 953 int 954 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 955 { 956 int error = 0; 957 958 if (newp) 959 return (EPERM); 960 961 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 962 963 return (error); 964 } 965 966 /* 967 * Validate parameters and get old / set new parameters 968 * for an quad-valued sysctl function. 969 */ 970 int 971 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 972 quad_t *valp) 973 { 974 int error = 0; 975 976 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 977 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 978 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 979 980 return (error); 981 } 982 983 /* 984 * As above, but read-only. 985 */ 986 int 987 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 988 { 989 int error = 0; 990 991 if (newp) 992 return (EPERM); 993 994 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 995 996 return (error); 997 } 998 999 /* 1000 * Validate parameters and get old / set new parameters 1001 * for a string-valued sysctl function. 1002 */ 1003 int 1004 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1005 int maxlen) 1006 { 1007 int len, error = 0, err2 = 0; 1008 1009 if (newp && newlen >= maxlen) 1010 return (EINVAL); 1011 1012 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1013 1014 if (error == 0 && newp) { 1015 error = copyin(newp, str, newlen); 1016 str[newlen] = 0; 1017 } 1018 return (error); 1019 } 1020 1021 /* 1022 * As above, but read-only. 1023 */ 1024 int 1025 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1026 { 1027 int len, error = 0, err2 = 0; 1028 1029 if (newp) 1030 return (EPERM); 1031 1032 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1033 1034 return (error); 1035 } 1036 1037 /* 1038 * Validate parameters and get old / set new parameters 1039 * for a structure oriented sysctl function. 1040 */ 1041 int 1042 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1043 int len) 1044 { 1045 int error = 0; 1046 1047 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1048 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1049 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1050 1051 return (error); 1052 } 1053 1054 /* 1055 * Validate parameters and get old parameters 1056 * for a structure oriented sysctl function. 1057 */ 1058 int 1059 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1060 int len) 1061 { 1062 int error = 0; 1063 1064 if (newp) 1065 return (EPERM); 1066 1067 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1068 1069 return (error); 1070 } 1071 1072 /* 1073 * As above, but can return a truncated result. 1074 */ 1075 int 1076 sysctl_rdminstruct(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 len = min(*oldlenp, len); 1085 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1086 1087 return (error); 1088 } 1089 1090 /* 1091 * Get file structures. 1092 */ 1093 static int 1094 sysctl_file(void *vwhere, size_t *sizep) 1095 { 1096 int buflen, error; 1097 struct file *fp; 1098 char *start, *where; 1099 1100 start = where = vwhere; 1101 buflen = *sizep; 1102 if (where == NULL) { 1103 /* 1104 * overestimate by 10 files 1105 */ 1106 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1107 return (0); 1108 } 1109 1110 /* 1111 * first copyout filehead 1112 */ 1113 if (buflen < sizeof(filehead)) { 1114 *sizep = 0; 1115 return (0); 1116 } 1117 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1118 if (error) 1119 return (error); 1120 buflen -= sizeof(filehead); 1121 where += sizeof(filehead); 1122 1123 /* 1124 * followed by an array of file structures 1125 */ 1126 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1127 if (buflen < sizeof(struct file)) { 1128 *sizep = where - start; 1129 return (ENOMEM); 1130 } 1131 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1132 if (error) 1133 return (error); 1134 buflen -= sizeof(struct file); 1135 where += sizeof(struct file); 1136 } 1137 *sizep = where - start; 1138 return (0); 1139 } 1140 1141 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1142 #define FILL_PERM(src, dst) do { \ 1143 (dst)._key = (src)._key; \ 1144 (dst).uid = (src).uid; \ 1145 (dst).gid = (src).gid; \ 1146 (dst).cuid = (src).cuid; \ 1147 (dst).cgid = (src).cgid; \ 1148 (dst).mode = (src).mode; \ 1149 (dst)._seq = (src)._seq; \ 1150 } while (0); 1151 #define FILL_MSG(src, dst) do { \ 1152 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1153 (dst).msg_qnum = (src).msg_qnum; \ 1154 (dst).msg_qbytes = (src).msg_qbytes; \ 1155 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1156 (dst).msg_lspid = (src).msg_lspid; \ 1157 (dst).msg_lrpid = (src).msg_lrpid; \ 1158 (dst).msg_stime = (src).msg_stime; \ 1159 (dst).msg_rtime = (src).msg_rtime; \ 1160 (dst).msg_ctime = (src).msg_ctime; \ 1161 } while (0) 1162 #define FILL_SEM(src, dst) do { \ 1163 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1164 (dst).sem_nsems = (src).sem_nsems; \ 1165 (dst).sem_otime = (src).sem_otime; \ 1166 (dst).sem_ctime = (src).sem_ctime; \ 1167 } while (0) 1168 #define FILL_SHM(src, dst) do { \ 1169 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1170 (dst).shm_segsz = (src).shm_segsz; \ 1171 (dst).shm_lpid = (src).shm_lpid; \ 1172 (dst).shm_cpid = (src).shm_cpid; \ 1173 (dst).shm_atime = (src).shm_atime; \ 1174 (dst).shm_dtime = (src).shm_dtime; \ 1175 (dst).shm_ctime = (src).shm_ctime; \ 1176 (dst).shm_nattch = (src).shm_nattch; \ 1177 } while (0) 1178 1179 static int 1180 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1181 { 1182 #ifdef SYSVMSG 1183 struct msg_sysctl_info *msgsi; 1184 #endif 1185 #ifdef SYSVSEM 1186 struct sem_sysctl_info *semsi; 1187 #endif 1188 #ifdef SYSVSHM 1189 struct shm_sysctl_info *shmsi; 1190 #endif 1191 size_t infosize, dssize, tsize, buflen; 1192 void *buf = NULL; 1193 char *start; 1194 int32_t nds; 1195 int i, error, ret; 1196 1197 if (namelen != 1) 1198 return (EINVAL); 1199 1200 start = where; 1201 buflen = *sizep; 1202 1203 switch (*name) { 1204 case KERN_SYSVIPC_MSG_INFO: 1205 #ifdef SYSVMSG 1206 infosize = sizeof(msgsi->msginfo); 1207 nds = msginfo.msgmni; 1208 dssize = sizeof(msgsi->msgids[0]); 1209 break; 1210 #else 1211 return (EINVAL); 1212 #endif 1213 case KERN_SYSVIPC_SEM_INFO: 1214 #ifdef SYSVSEM 1215 infosize = sizeof(semsi->seminfo); 1216 nds = seminfo.semmni; 1217 dssize = sizeof(semsi->semids[0]); 1218 break; 1219 #else 1220 return (EINVAL); 1221 #endif 1222 case KERN_SYSVIPC_SHM_INFO: 1223 #ifdef SYSVSHM 1224 infosize = sizeof(shmsi->shminfo); 1225 nds = shminfo.shmmni; 1226 dssize = sizeof(shmsi->shmids[0]); 1227 break; 1228 #else 1229 return (EINVAL); 1230 #endif 1231 default: 1232 return (EINVAL); 1233 } 1234 /* 1235 * Round infosize to 64 bit boundary if requesting more than just 1236 * the info structure or getting the total data size. 1237 */ 1238 if (where == NULL || *sizep > infosize) 1239 infosize = ((infosize + 7) / 8) * 8; 1240 tsize = infosize + nds * dssize; 1241 1242 /* Return just the total size required. */ 1243 if (where == NULL) { 1244 *sizep = tsize; 1245 return (0); 1246 } 1247 1248 /* Not enough room for even the info struct. */ 1249 if (buflen < infosize) { 1250 *sizep = 0; 1251 return (ENOMEM); 1252 } 1253 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1254 memset(buf, 0, min(tsize, buflen)); 1255 1256 switch (*name) { 1257 #ifdef SYSVMSG 1258 case KERN_SYSVIPC_MSG_INFO: 1259 msgsi = (struct msg_sysctl_info *)buf; 1260 msgsi->msginfo = msginfo; 1261 break; 1262 #endif 1263 #ifdef SYSVSEM 1264 case KERN_SYSVIPC_SEM_INFO: 1265 semsi = (struct sem_sysctl_info *)buf; 1266 semsi->seminfo = seminfo; 1267 break; 1268 #endif 1269 #ifdef SYSVSHM 1270 case KERN_SYSVIPC_SHM_INFO: 1271 shmsi = (struct shm_sysctl_info *)buf; 1272 shmsi->shminfo = shminfo; 1273 break; 1274 #endif 1275 } 1276 buflen -= infosize; 1277 1278 ret = 0; 1279 if (buflen > 0) { 1280 /* Fill in the IPC data structures. */ 1281 for (i = 0; i < nds; i++) { 1282 if (buflen < dssize) { 1283 ret = ENOMEM; 1284 break; 1285 } 1286 switch (*name) { 1287 #ifdef SYSVMSG 1288 case KERN_SYSVIPC_MSG_INFO: 1289 FILL_MSG(msqids[i], msgsi->msgids[i]); 1290 break; 1291 #endif 1292 #ifdef SYSVSEM 1293 case KERN_SYSVIPC_SEM_INFO: 1294 FILL_SEM(sema[i], semsi->semids[i]); 1295 break; 1296 #endif 1297 #ifdef SYSVSHM 1298 case KERN_SYSVIPC_SHM_INFO: 1299 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1300 break; 1301 #endif 1302 } 1303 buflen -= dssize; 1304 } 1305 } 1306 *sizep -= buflen; 1307 error = copyout(buf, start, *sizep); 1308 /* If copyout succeeded, use return code set earlier. */ 1309 if (error == 0) 1310 error = ret; 1311 if (buf) 1312 free(buf, M_TEMP); 1313 return (error); 1314 } 1315 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1316 1317 static int 1318 sysctl_msgbuf(void *vwhere, size_t *sizep) 1319 { 1320 char *where = vwhere; 1321 size_t len, maxlen = *sizep; 1322 long beg, end; 1323 int error; 1324 1325 /* 1326 * deal with cases where the message buffer has 1327 * become corrupted. 1328 */ 1329 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1330 msgbufenabled = 0; 1331 return (ENXIO); 1332 } 1333 1334 if (where == NULL) { 1335 /* always return full buffer size */ 1336 *sizep = msgbufp->msg_bufs; 1337 return (0); 1338 } 1339 1340 error = 0; 1341 maxlen = min(msgbufp->msg_bufs, maxlen); 1342 1343 /* 1344 * First, copy from the write pointer to the end of 1345 * message buffer. 1346 */ 1347 beg = msgbufp->msg_bufx; 1348 end = msgbufp->msg_bufs; 1349 while (maxlen > 0) { 1350 len = min(end - beg, maxlen); 1351 if (len == 0) 1352 break; 1353 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1354 if (error) 1355 break; 1356 where += len; 1357 maxlen -= len; 1358 1359 /* 1360 * ... then, copy from the beginning of message buffer to 1361 * the write pointer. 1362 */ 1363 beg = 0; 1364 end = msgbufp->msg_bufx; 1365 } 1366 return (error); 1367 } 1368 1369 /* 1370 * try over estimating by 5 procs 1371 */ 1372 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1373 1374 static int 1375 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1376 { 1377 struct eproc eproc; 1378 struct kinfo_proc2 kproc2; 1379 struct kinfo_proc *dp; 1380 struct proc *p; 1381 const struct proclist_desc *pd; 1382 char *where, *dp2; 1383 int type, op, arg, elem_size, elem_count; 1384 int buflen, needed, error; 1385 1386 dp = vwhere; 1387 dp2 = where = vwhere; 1388 buflen = where != NULL ? *sizep : 0; 1389 error = needed = 0; 1390 type = name[0]; 1391 1392 if (type == KERN_PROC) { 1393 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1394 return (EINVAL); 1395 op = name[1]; 1396 if (op != KERN_PROC_ALL) 1397 arg = name[2]; 1398 } else { 1399 if (namelen != 5) 1400 return (EINVAL); 1401 op = name[1]; 1402 arg = name[2]; 1403 elem_size = name[3]; 1404 elem_count = name[4]; 1405 } 1406 1407 proclist_lock_read(); 1408 1409 pd = proclists; 1410 again: 1411 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1412 /* 1413 * Skip embryonic processes. 1414 */ 1415 if (p->p_stat == SIDL) 1416 continue; 1417 /* 1418 * TODO - make more efficient (see notes below). 1419 * do by session. 1420 */ 1421 switch (op) { 1422 1423 case KERN_PROC_PID: 1424 /* could do this with just a lookup */ 1425 if (p->p_pid != (pid_t)arg) 1426 continue; 1427 break; 1428 1429 case KERN_PROC_PGRP: 1430 /* could do this by traversing pgrp */ 1431 if (p->p_pgrp->pg_id != (pid_t)arg) 1432 continue; 1433 break; 1434 1435 case KERN_PROC_SESSION: 1436 if (p->p_session->s_sid != (pid_t)arg) 1437 continue; 1438 break; 1439 1440 case KERN_PROC_TTY: 1441 if (arg == KERN_PROC_TTY_REVOKE) { 1442 if ((p->p_flag & P_CONTROLT) == 0 || 1443 p->p_session->s_ttyp == NULL || 1444 p->p_session->s_ttyvp != NULL) 1445 continue; 1446 } else if ((p->p_flag & P_CONTROLT) == 0 || 1447 p->p_session->s_ttyp == NULL) { 1448 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1449 continue; 1450 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1451 continue; 1452 break; 1453 1454 case KERN_PROC_UID: 1455 if (p->p_ucred->cr_uid != (uid_t)arg) 1456 continue; 1457 break; 1458 1459 case KERN_PROC_RUID: 1460 if (p->p_cred->p_ruid != (uid_t)arg) 1461 continue; 1462 break; 1463 1464 case KERN_PROC_GID: 1465 if (p->p_ucred->cr_gid != (uid_t)arg) 1466 continue; 1467 break; 1468 1469 case KERN_PROC_RGID: 1470 if (p->p_cred->p_rgid != (uid_t)arg) 1471 continue; 1472 break; 1473 1474 case KERN_PROC_ALL: 1475 /* allow everything */ 1476 break; 1477 1478 default: 1479 error = EINVAL; 1480 goto cleanup; 1481 } 1482 if (type == KERN_PROC) { 1483 if (buflen >= sizeof(struct kinfo_proc)) { 1484 fill_eproc(p, &eproc); 1485 error = copyout((caddr_t)p, &dp->kp_proc, 1486 sizeof(struct proc)); 1487 if (error) 1488 goto cleanup; 1489 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1490 sizeof(eproc)); 1491 if (error) 1492 goto cleanup; 1493 dp++; 1494 buflen -= sizeof(struct kinfo_proc); 1495 } 1496 needed += sizeof(struct kinfo_proc); 1497 } else { /* KERN_PROC2 */ 1498 if (buflen >= elem_size && elem_count > 0) { 1499 fill_kproc2(p, &kproc2); 1500 /* 1501 * Copy out elem_size, but not larger than 1502 * the size of a struct kinfo_proc2. 1503 */ 1504 error = copyout(&kproc2, dp2, 1505 min(sizeof(kproc2), elem_size)); 1506 if (error) 1507 goto cleanup; 1508 dp2 += elem_size; 1509 buflen -= elem_size; 1510 elem_count--; 1511 } 1512 needed += elem_size; 1513 } 1514 } 1515 pd++; 1516 if (pd->pd_list != NULL) 1517 goto again; 1518 proclist_unlock_read(); 1519 1520 if (where != NULL) { 1521 if (type == KERN_PROC) 1522 *sizep = (caddr_t)dp - where; 1523 else 1524 *sizep = dp2 - where; 1525 if (needed > *sizep) 1526 return (ENOMEM); 1527 } else { 1528 needed += KERN_PROCSLOP; 1529 *sizep = needed; 1530 } 1531 return (0); 1532 cleanup: 1533 proclist_unlock_read(); 1534 return (error); 1535 } 1536 1537 1538 /* 1539 * try over estimating by 5 LWPs 1540 */ 1541 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1542 1543 static int 1544 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1545 { 1546 struct kinfo_lwp klwp; 1547 struct proc *p; 1548 struct lwp *l; 1549 char *where, *dp; 1550 int type, pid, elem_size, elem_count; 1551 int buflen, needed, error; 1552 1553 dp = where = vwhere; 1554 buflen = where != NULL ? *sizep : 0; 1555 error = needed = 0; 1556 type = name[0]; 1557 1558 if (namelen != 4) 1559 return (EINVAL); 1560 pid = name[1]; 1561 elem_size = name[2]; 1562 elem_count = name[3]; 1563 1564 p = pfind(pid); 1565 if (p == NULL) 1566 return (ESRCH); 1567 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1568 if (buflen >= elem_size && elem_count > 0) { 1569 fill_lwp(l, &klwp); 1570 /* 1571 * Copy out elem_size, but not larger than 1572 * the size of a struct kinfo_proc2. 1573 */ 1574 error = copyout(&klwp, dp, 1575 min(sizeof(klwp), elem_size)); 1576 if (error) 1577 goto cleanup; 1578 dp += elem_size; 1579 buflen -= elem_size; 1580 elem_count--; 1581 } 1582 needed += elem_size; 1583 } 1584 1585 if (where != NULL) { 1586 *sizep = dp - where; 1587 if (needed > *sizep) 1588 return (ENOMEM); 1589 } else { 1590 needed += KERN_PROCSLOP; 1591 *sizep = needed; 1592 } 1593 return (0); 1594 cleanup: 1595 return (error); 1596 } 1597 1598 /* 1599 * Fill in an eproc structure for the specified process. 1600 */ 1601 void 1602 fill_eproc(struct proc *p, struct eproc *ep) 1603 { 1604 struct tty *tp; 1605 struct lwp *l; 1606 1607 ep->e_paddr = p; 1608 ep->e_sess = p->p_session; 1609 ep->e_pcred = *p->p_cred; 1610 ep->e_ucred = *p->p_ucred; 1611 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1612 ep->e_vm.vm_rssize = 0; 1613 ep->e_vm.vm_tsize = 0; 1614 ep->e_vm.vm_dsize = 0; 1615 ep->e_vm.vm_ssize = 0; 1616 /* ep->e_vm.vm_pmap = XXX; */ 1617 } else { 1618 struct vmspace *vm = p->p_vmspace; 1619 1620 ep->e_vm.vm_rssize = vm_resident_count(vm); 1621 ep->e_vm.vm_tsize = vm->vm_tsize; 1622 ep->e_vm.vm_dsize = vm->vm_dsize; 1623 ep->e_vm.vm_ssize = vm->vm_ssize; 1624 1625 /* Pick a "representative" LWP */ 1626 l = proc_representative_lwp(p); 1627 1628 if (l->l_wmesg) 1629 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1630 } 1631 if (p->p_pptr) 1632 ep->e_ppid = p->p_pptr->p_pid; 1633 else 1634 ep->e_ppid = 0; 1635 ep->e_pgid = p->p_pgrp->pg_id; 1636 ep->e_sid = ep->e_sess->s_sid; 1637 ep->e_jobc = p->p_pgrp->pg_jobc; 1638 if ((p->p_flag & P_CONTROLT) && 1639 (tp = ep->e_sess->s_ttyp)) { 1640 ep->e_tdev = tp->t_dev; 1641 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1642 ep->e_tsess = tp->t_session; 1643 } else 1644 ep->e_tdev = NODEV; 1645 1646 ep->e_xsize = ep->e_xrssize = 0; 1647 ep->e_xccount = ep->e_xswrss = 0; 1648 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1649 if (SESS_LEADER(p)) 1650 ep->e_flag |= EPROC_SLEADER; 1651 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1652 } 1653 1654 /* 1655 * Fill in an eproc structure for the specified process. 1656 */ 1657 static void 1658 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1659 { 1660 struct tty *tp; 1661 struct lwp *l; 1662 memset(ki, 0, sizeof(*ki)); 1663 1664 ki->p_paddr = PTRTOINT64(p); 1665 ki->p_fd = PTRTOINT64(p->p_fd); 1666 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1667 ki->p_stats = PTRTOINT64(p->p_stats); 1668 ki->p_limit = PTRTOINT64(p->p_limit); 1669 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1670 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1671 ki->p_sess = PTRTOINT64(p->p_session); 1672 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1673 ki->p_ru = PTRTOINT64(p->p_ru); 1674 1675 ki->p_eflag = 0; 1676 ki->p_exitsig = p->p_exitsig; 1677 ki->p_flag = p->p_flag; 1678 1679 ki->p_pid = p->p_pid; 1680 if (p->p_pptr) 1681 ki->p_ppid = p->p_pptr->p_pid; 1682 else 1683 ki->p_ppid = 0; 1684 ki->p_sid = p->p_session->s_sid; 1685 ki->p__pgid = p->p_pgrp->pg_id; 1686 1687 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1688 1689 ki->p_uid = p->p_ucred->cr_uid; 1690 ki->p_ruid = p->p_cred->p_ruid; 1691 ki->p_gid = p->p_ucred->cr_gid; 1692 ki->p_rgid = p->p_cred->p_rgid; 1693 1694 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1695 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1696 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1697 1698 ki->p_jobc = p->p_pgrp->pg_jobc; 1699 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1700 ki->p_tdev = tp->t_dev; 1701 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1702 ki->p_tsess = PTRTOINT64(tp->t_session); 1703 } else { 1704 ki->p_tdev = NODEV; 1705 } 1706 1707 ki->p_estcpu = p->p_estcpu; 1708 ki->p_rtime_sec = p->p_rtime.tv_sec; 1709 ki->p_rtime_usec = p->p_rtime.tv_usec; 1710 ki->p_cpticks = p->p_cpticks; 1711 ki->p_pctcpu = p->p_pctcpu; 1712 1713 ki->p_uticks = p->p_uticks; 1714 ki->p_sticks = p->p_sticks; 1715 ki->p_iticks = p->p_iticks; 1716 1717 ki->p_tracep = PTRTOINT64(p->p_tracep); 1718 ki->p_traceflag = p->p_traceflag; 1719 1720 1721 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1722 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1723 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1724 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1725 1726 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1727 ki->p_realstat = p->p_stat; 1728 ki->p_nice = p->p_nice; 1729 1730 ki->p_xstat = p->p_xstat; 1731 ki->p_acflag = p->p_acflag; 1732 1733 strncpy(ki->p_comm, p->p_comm, 1734 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1735 1736 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1737 1738 ki->p_nlwps = p->p_nlwps; 1739 ki->p_nrlwps = p->p_nrlwps; 1740 ki->p_realflag = p->p_flag; 1741 1742 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1743 ki->p_vm_rssize = 0; 1744 ki->p_vm_tsize = 0; 1745 ki->p_vm_dsize = 0; 1746 ki->p_vm_ssize = 0; 1747 l = NULL; 1748 } else { 1749 struct vmspace *vm = p->p_vmspace; 1750 1751 ki->p_vm_rssize = vm_resident_count(vm); 1752 ki->p_vm_tsize = vm->vm_tsize; 1753 ki->p_vm_dsize = vm->vm_dsize; 1754 ki->p_vm_ssize = vm->vm_ssize; 1755 1756 /* Pick a "representative" LWP */ 1757 l = proc_representative_lwp(p); 1758 ki->p_forw = PTRTOINT64(l->l_forw); 1759 ki->p_back = PTRTOINT64(l->l_back); 1760 ki->p_addr = PTRTOINT64(l->l_addr); 1761 ki->p_stat = l->l_stat; 1762 ki->p_flag |= l->l_flag; 1763 ki->p_swtime = l->l_swtime; 1764 ki->p_slptime = l->l_slptime; 1765 if (l->l_stat == LSONPROC) { 1766 KDASSERT(l->l_cpu != NULL); 1767 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1768 } else 1769 ki->p_schedflags = 0; 1770 ki->p_holdcnt = l->l_holdcnt; 1771 ki->p_priority = l->l_priority; 1772 ki->p_usrpri = l->l_usrpri; 1773 if (l->l_wmesg) 1774 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1775 ki->p_wchan = PTRTOINT64(l->l_wchan); 1776 1777 } 1778 1779 if (p->p_session->s_ttyvp) 1780 ki->p_eflag |= EPROC_CTTY; 1781 if (SESS_LEADER(p)) 1782 ki->p_eflag |= EPROC_SLEADER; 1783 1784 /* XXX Is this double check necessary? */ 1785 if (P_ZOMBIE(p)) { 1786 ki->p_uvalid = 0; 1787 } else { 1788 ki->p_uvalid = 1; 1789 1790 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1791 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1792 1793 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1794 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1795 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1796 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1797 1798 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1799 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1800 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1801 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1802 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1803 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1804 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1805 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1806 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1807 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1808 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1809 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1810 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1811 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1812 1813 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1814 p->p_stats->p_cru.ru_stime.tv_sec; 1815 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1816 p->p_stats->p_cru.ru_stime.tv_usec; 1817 } 1818 #ifdef MULTIPROCESSOR 1819 if (l && l->l_cpu != NULL) 1820 ki->p_cpuid = l->l_cpu->ci_cpuid; 1821 else 1822 #endif 1823 ki->p_cpuid = KI_NOCPU; 1824 1825 } 1826 1827 /* 1828 * Fill in a kinfo_lwp structure for the specified lwp. 1829 */ 1830 static void 1831 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1832 { 1833 kl->l_forw = PTRTOINT64(l->l_forw); 1834 kl->l_back = PTRTOINT64(l->l_back); 1835 kl->l_laddr = PTRTOINT64(l); 1836 kl->l_addr = PTRTOINT64(l->l_addr); 1837 kl->l_stat = l->l_stat; 1838 kl->l_lid = l->l_lid; 1839 kl->l_flag = l->l_flag; 1840 1841 kl->l_swtime = l->l_swtime; 1842 kl->l_slptime = l->l_slptime; 1843 if (l->l_stat == LSONPROC) { 1844 KDASSERT(l->l_cpu != NULL); 1845 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1846 } else 1847 kl->l_schedflags = 0; 1848 kl->l_holdcnt = l->l_holdcnt; 1849 kl->l_priority = l->l_priority; 1850 kl->l_usrpri = l->l_usrpri; 1851 if (l->l_wmesg) 1852 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1853 kl->l_wchan = PTRTOINT64(l->l_wchan); 1854 #ifdef MULTIPROCESSOR 1855 if (l->l_cpu != NULL) 1856 kl->l_cpuid = l->l_cpu->ci_cpuid; 1857 else 1858 #endif 1859 kl->l_cpuid = KI_NOCPU; 1860 } 1861 1862 int 1863 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1864 struct proc *up) 1865 { 1866 struct ps_strings pss; 1867 struct proc *p; 1868 size_t len, upper_bound, xlen; 1869 struct uio auio; 1870 struct iovec aiov; 1871 vaddr_t argv; 1872 pid_t pid; 1873 int nargv, type, error, i; 1874 char *arg; 1875 char *tmp; 1876 1877 if (namelen != 2) 1878 return (EINVAL); 1879 pid = name[0]; 1880 type = name[1]; 1881 1882 switch (type) { 1883 case KERN_PROC_ARGV: 1884 case KERN_PROC_NARGV: 1885 case KERN_PROC_ENV: 1886 case KERN_PROC_NENV: 1887 /* ok */ 1888 break; 1889 default: 1890 return (EINVAL); 1891 } 1892 1893 /* check pid */ 1894 if ((p = pfind(pid)) == NULL) 1895 return (EINVAL); 1896 1897 /* only root or same user change look at the environment */ 1898 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1899 if (up->p_ucred->cr_uid != 0) { 1900 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1901 up->p_cred->p_ruid != p->p_cred->p_svuid) 1902 return (EPERM); 1903 } 1904 } 1905 1906 if (sizep != NULL && where == NULL) { 1907 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1908 *sizep = sizeof (int); 1909 else 1910 *sizep = ARG_MAX; /* XXX XXX XXX */ 1911 return (0); 1912 } 1913 if (where == NULL || sizep == NULL) 1914 return (EINVAL); 1915 1916 /* 1917 * Zombies don't have a stack, so we can't read their psstrings. 1918 * System processes also don't have a user stack. 1919 */ 1920 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1921 return (EINVAL); 1922 1923 /* 1924 * Lock the process down in memory. 1925 */ 1926 /* XXXCDC: how should locking work here? */ 1927 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1928 return (EFAULT); 1929 1930 p->p_vmspace->vm_refcnt++; /* XXX */ 1931 1932 /* 1933 * Allocate a temporary buffer to hold the arguments. 1934 */ 1935 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1936 1937 /* 1938 * Read in the ps_strings structure. 1939 */ 1940 aiov.iov_base = &pss; 1941 aiov.iov_len = sizeof(pss); 1942 auio.uio_iov = &aiov; 1943 auio.uio_iovcnt = 1; 1944 auio.uio_offset = (vaddr_t)p->p_psstr; 1945 auio.uio_resid = sizeof(pss); 1946 auio.uio_segflg = UIO_SYSSPACE; 1947 auio.uio_rw = UIO_READ; 1948 auio.uio_procp = NULL; 1949 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1950 if (error) 1951 goto done; 1952 1953 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1954 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1955 else 1956 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1957 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1958 error = copyout(&nargv, where, sizeof(nargv)); 1959 *sizep = sizeof(nargv); 1960 goto done; 1961 } 1962 /* 1963 * Now read the address of the argument vector. 1964 */ 1965 switch (type) { 1966 case KERN_PROC_ARGV: 1967 /* XXX compat32 stuff here */ 1968 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1969 break; 1970 case KERN_PROC_ENV: 1971 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1972 break; 1973 default: 1974 return (EINVAL); 1975 } 1976 auio.uio_offset = (off_t)(long)tmp; 1977 aiov.iov_base = &argv; 1978 aiov.iov_len = sizeof(argv); 1979 auio.uio_iov = &aiov; 1980 auio.uio_iovcnt = 1; 1981 auio.uio_resid = sizeof(argv); 1982 auio.uio_segflg = UIO_SYSSPACE; 1983 auio.uio_rw = UIO_READ; 1984 auio.uio_procp = NULL; 1985 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1986 if (error) 1987 goto done; 1988 1989 /* 1990 * Now copy in the actual argument vector, one page at a time, 1991 * since we don't know how long the vector is (though, we do 1992 * know how many NUL-terminated strings are in the vector). 1993 */ 1994 len = 0; 1995 upper_bound = *sizep; 1996 for (; nargv != 0 && len < upper_bound; len += xlen) { 1997 aiov.iov_base = arg; 1998 aiov.iov_len = PAGE_SIZE; 1999 auio.uio_iov = &aiov; 2000 auio.uio_iovcnt = 1; 2001 auio.uio_offset = argv + len; 2002 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2003 auio.uio_resid = xlen; 2004 auio.uio_segflg = UIO_SYSSPACE; 2005 auio.uio_rw = UIO_READ; 2006 auio.uio_procp = NULL; 2007 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2008 if (error) 2009 goto done; 2010 2011 for (i = 0; i < xlen && nargv != 0; i++) { 2012 if (arg[i] == '\0') 2013 nargv--; /* one full string */ 2014 } 2015 2016 /* make sure we don't copyout past the end of the user's buffer */ 2017 if (len + i > upper_bound) 2018 i = upper_bound - len; 2019 2020 error = copyout(arg, (char *)where + len, i); 2021 if (error) 2022 break; 2023 2024 if (nargv == 0) { 2025 len += i; 2026 break; 2027 } 2028 } 2029 *sizep = len; 2030 2031 done: 2032 uvmspace_free(p->p_vmspace); 2033 2034 free(arg, M_TEMP); 2035 return (error); 2036 } 2037 2038 #if NPTY > 0 2039 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2040 2041 /* 2042 * Validate parameters and get old / set new parameters 2043 * for pty sysctl function. 2044 */ 2045 static int 2046 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2047 { 2048 int error = 0; 2049 int oldmax = 0, newmax = 0; 2050 2051 /* get current value of maxptys */ 2052 oldmax = pty_maxptys(0, 0); 2053 2054 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2055 2056 if (!error && newp) { 2057 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2058 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2059 2060 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2061 return (EINVAL); 2062 2063 } 2064 2065 return (error); 2066 } 2067 #endif /* NPTY > 0 */ 2068 2069 static int 2070 sysctl_dotkstat(name, namelen, where, sizep, newp) 2071 int *name; 2072 u_int namelen; 2073 void *where; 2074 size_t *sizep; 2075 void *newp; 2076 { 2077 /* all sysctl names at this level are terminal */ 2078 if (namelen != 1) 2079 return (ENOTDIR); /* overloaded */ 2080 2081 switch (name[0]) { 2082 case KERN_TKSTAT_NIN: 2083 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2084 case KERN_TKSTAT_NOUT: 2085 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2086 case KERN_TKSTAT_CANCC: 2087 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2088 case KERN_TKSTAT_RAWCC: 2089 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2090 default: 2091 return (EOPNOTSUPP); 2092 } 2093 } 2094
Indexes created Tue Sep 30 06:09:59 GMT 2025