kern_sysctl.c revision 1.98
1 /* $NetBSD: kern_sysctl.c,v 1.98 2002/01/27 12:41:08 simonb 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 1.98 2002/01/27 12:41:08 simonb Exp $"); 47 48 #include "opt_ddb.h" 49 #include "opt_insecure.h" 50 #include "opt_defcorename.h" 51 #include "opt_new_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/syscallargs.h> 73 #include <sys/tty.h> 74 #include <sys/unistd.h> 75 #include <sys/vnode.h> 76 #include <sys/socketvar.h> 77 #define __SYSCTL_PRIVATE 78 #include <sys/sysctl.h> 79 #include <sys/lock.h> 80 #include <sys/namei.h> 81 82 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 83 #include <sys/ipc.h> 84 #endif 85 #ifdef SYSVMSG 86 #include <sys/msg.h> 87 #endif 88 #ifdef SYSVSEM 89 #include <sys/sem.h> 90 #endif 91 #ifdef SYSVSHM 92 #include <sys/shm.h> 93 #endif 94 95 #include <dev/cons.h> 96 97 #if defined(DDB) 98 #include <ddb/ddbvar.h> 99 #endif 100 101 #ifdef NEW_PIPE 102 #include <sys/pipe.h> 103 #endif 104 105 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 106 107 static int sysctl_file(void *, size_t *); 108 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 109 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 110 #endif 111 static int sysctl_msgbuf(void *, size_t *); 112 static int sysctl_doeproc(int *, u_int, void *, size_t *); 113 #ifdef MULTIPROCESSOR 114 static int sysctl_docptime(void *, size_t *, void *); 115 static int sysctl_ncpus(void); 116 #endif 117 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 118 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 119 #if NPTY > 0 120 static int sysctl_pty(void *, size_t *, void *, size_t); 121 #endif 122 123 /* 124 * The `sysctl_memlock' is intended to keep too many processes from 125 * locking down memory by doing sysctls at once. Whether or not this 126 * is really a good idea to worry about it probably a subject of some 127 * debate. 128 */ 129 struct lock sysctl_memlock; 130 131 void 132 sysctl_init(void) 133 { 134 135 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 136 } 137 138 int 139 sys___sysctl(struct proc *p, void *v, register_t *retval) 140 { 141 struct sys___sysctl_args /* { 142 syscallarg(int *) name; 143 syscallarg(u_int) namelen; 144 syscallarg(void *) old; 145 syscallarg(size_t *) oldlenp; 146 syscallarg(void *) new; 147 syscallarg(size_t) newlen; 148 } */ *uap = v; 149 int error; 150 size_t savelen = 0, oldlen = 0; 151 sysctlfn *fn; 152 int name[CTL_MAXNAME]; 153 size_t *oldlenp; 154 155 /* 156 * all top-level sysctl names are non-terminal 157 */ 158 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 159 return (EINVAL); 160 error = copyin(SCARG(uap, name), &name, 161 SCARG(uap, namelen) * sizeof(int)); 162 if (error) 163 return (error); 164 165 /* 166 * For all but CTL_PROC, must be root to change a value. 167 * For CTL_PROC, must be root, or owner of the proc (and not suid), 168 * this is checked in proc_sysctl() (once we know the targer proc). 169 */ 170 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 171 (error = suser(p->p_ucred, &p->p_acflag))) 172 return error; 173 174 switch (name[0]) { 175 case CTL_KERN: 176 fn = kern_sysctl; 177 break; 178 case CTL_HW: 179 fn = hw_sysctl; 180 break; 181 case CTL_VM: 182 fn = uvm_sysctl; 183 break; 184 case CTL_NET: 185 fn = net_sysctl; 186 break; 187 case CTL_VFS: 188 fn = vfs_sysctl; 189 break; 190 case CTL_MACHDEP: 191 fn = cpu_sysctl; 192 break; 193 #ifdef DEBUG 194 case CTL_DEBUG: 195 fn = debug_sysctl; 196 break; 197 #endif 198 #ifdef DDB 199 case CTL_DDB: 200 fn = ddb_sysctl; 201 break; 202 #endif 203 case CTL_PROC: 204 fn = proc_sysctl; 205 break; 206 default: 207 return (EOPNOTSUPP); 208 } 209 210 /* 211 * XXX Hey, we wire `old', but what about `new'? 212 */ 213 214 oldlenp = SCARG(uap, oldlenp); 215 if (oldlenp) { 216 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 217 return (error); 218 oldlenp = &oldlen; 219 } 220 if (SCARG(uap, old) != NULL) { 221 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 222 if (error) 223 return (error); 224 error = uvm_vslock(p, SCARG(uap, old), oldlen, 225 VM_PROT_READ|VM_PROT_WRITE); 226 if (error) { 227 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 228 return error; 229 } 230 savelen = oldlen; 231 } 232 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 233 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 234 if (SCARG(uap, old) != NULL) { 235 uvm_vsunlock(p, SCARG(uap, old), savelen); 236 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 237 } 238 if (error) 239 return (error); 240 if (SCARG(uap, oldlenp)) 241 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 242 return (error); 243 } 244 245 /* 246 * Attributes stored in the kernel. 247 */ 248 char hostname[MAXHOSTNAMELEN]; 249 int hostnamelen; 250 251 char domainname[MAXHOSTNAMELEN]; 252 int domainnamelen; 253 254 long hostid; 255 256 #ifdef INSECURE 257 int securelevel = -1; 258 #else 259 int securelevel = 0; 260 #endif 261 262 #ifndef DEFCORENAME 263 #define DEFCORENAME "%n.core" 264 #endif 265 char defcorename[MAXPATHLEN] = DEFCORENAME; 266 int defcorenamelen = sizeof(DEFCORENAME); 267 268 extern int kern_logsigexit; 269 extern fixpt_t ccpu; 270 271 #ifndef MULTIPROCESSOR 272 #define sysctl_ncpus() 1 273 #endif 274 275 #ifdef MULTIPROCESSOR 276 277 #ifndef CPU_INFO_FOREACH 278 #define CPU_INFO_ITERATOR int 279 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 280 #endif 281 282 static int 283 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 284 { 285 u_int64_t cp_time[CPUSTATES]; 286 int i; 287 struct cpu_info *ci; 288 CPU_INFO_ITERATOR cii; 289 290 for (i=0; i<CPUSTATES; i++) 291 cp_time[i] = 0; 292 293 for (CPU_INFO_FOREACH(cii, ci)) { 294 for (i=0; i<CPUSTATES; i++) 295 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 296 } 297 return (sysctl_rdstruct(oldp, oldlenp, newp, 298 cp_time, sizeof(cp_time))); 299 } 300 301 static int 302 sysctl_ncpus(void) 303 { 304 struct cpu_info *ci; 305 CPU_INFO_ITERATOR cii; 306 307 int ncpus = 0; 308 for (CPU_INFO_FOREACH(cii, ci)) 309 ncpus++; 310 return ncpus; 311 } 312 313 #endif 314 315 /* 316 * kernel related system variables. 317 */ 318 int 319 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 320 void *newp, size_t newlen, struct proc *p) 321 { 322 int error, level, inthostid; 323 int old_autonicetime; 324 int old_vnodes; 325 dev_t consdev; 326 327 /* All sysctl names at this level, except for a few, are terminal. */ 328 switch (name[0]) { 329 case KERN_PROC: 330 case KERN_PROC2: 331 case KERN_PROF: 332 case KERN_MBUF: 333 case KERN_PROC_ARGS: 334 case KERN_SYSVIPC_INFO: 335 case KERN_PIPE: 336 /* Not terminal. */ 337 break; 338 default: 339 if (namelen != 1) 340 return (ENOTDIR); /* overloaded */ 341 } 342 343 switch (name[0]) { 344 case KERN_OSTYPE: 345 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 346 case KERN_OSRELEASE: 347 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 348 case KERN_OSREV: 349 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 350 case KERN_VERSION: 351 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 352 case KERN_MAXVNODES: 353 old_vnodes = desiredvnodes; 354 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 355 if (old_vnodes > desiredvnodes) { 356 desiredvnodes = old_vnodes; 357 return (EINVAL); 358 } 359 if (error == 0) { 360 vfs_reinit(); 361 nchreinit(); 362 } 363 return (error); 364 case KERN_MAXPROC: 365 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 366 case KERN_MAXFILES: 367 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 368 case KERN_ARGMAX: 369 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 370 case KERN_SECURELVL: 371 level = securelevel; 372 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 373 newp == NULL) 374 return (error); 375 if (level < securelevel && p->p_pid != 1) 376 return (EPERM); 377 securelevel = level; 378 return (0); 379 case KERN_HOSTNAME: 380 error = sysctl_string(oldp, oldlenp, newp, newlen, 381 hostname, sizeof(hostname)); 382 if (newp && !error) 383 hostnamelen = newlen; 384 return (error); 385 case KERN_DOMAINNAME: 386 error = sysctl_string(oldp, oldlenp, newp, newlen, 387 domainname, sizeof(domainname)); 388 if (newp && !error) 389 domainnamelen = newlen; 390 return (error); 391 case KERN_HOSTID: 392 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 393 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 394 hostid = inthostid; 395 return (error); 396 case KERN_CLOCKRATE: 397 return (sysctl_clockrate(oldp, oldlenp)); 398 case KERN_BOOTTIME: 399 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 400 sizeof(struct timeval))); 401 case KERN_VNODE: 402 return (sysctl_vnode(oldp, oldlenp, p)); 403 case KERN_PROC: 404 case KERN_PROC2: 405 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 406 case KERN_PROC_ARGS: 407 return (sysctl_procargs(name + 1, namelen - 1, 408 oldp, oldlenp, p)); 409 case KERN_FILE: 410 return (sysctl_file(oldp, oldlenp)); 411 #ifdef GPROF 412 case KERN_PROF: 413 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 414 newp, newlen)); 415 #endif 416 case KERN_POSIX1: 417 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 418 case KERN_NGROUPS: 419 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 420 case KERN_JOB_CONTROL: 421 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 422 case KERN_SAVED_IDS: 423 #ifdef _POSIX_SAVED_IDS 424 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 425 #else 426 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 427 #endif 428 case KERN_MAXPARTITIONS: 429 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 430 case KERN_RAWPARTITION: 431 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 432 #ifdef NTP 433 case KERN_NTPTIME: 434 return (sysctl_ntptime(oldp, oldlenp)); 435 #endif 436 case KERN_AUTONICETIME: 437 old_autonicetime = autonicetime; 438 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 439 if (autonicetime < 0) 440 autonicetime = old_autonicetime; 441 return (error); 442 case KERN_AUTONICEVAL: 443 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 444 if (autoniceval < PRIO_MIN) 445 autoniceval = PRIO_MIN; 446 if (autoniceval > PRIO_MAX) 447 autoniceval = PRIO_MAX; 448 return (error); 449 case KERN_RTC_OFFSET: 450 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 451 case KERN_ROOT_DEVICE: 452 return (sysctl_rdstring(oldp, oldlenp, newp, 453 root_device->dv_xname)); 454 case KERN_MSGBUFSIZE: 455 /* 456 * deal with cases where the message buffer has 457 * become corrupted. 458 */ 459 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 460 msgbufenabled = 0; 461 return (ENXIO); 462 } 463 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 464 case KERN_FSYNC: 465 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 466 case KERN_SYSVMSG: 467 #ifdef SYSVMSG 468 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 469 #else 470 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 471 #endif 472 case KERN_SYSVSEM: 473 #ifdef SYSVSEM 474 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 475 #else 476 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 477 #endif 478 case KERN_SYSVSHM: 479 #ifdef SYSVSHM 480 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 481 #else 482 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 483 #endif 484 case KERN_DEFCORENAME: 485 if (newp && newlen < 1) 486 return (EINVAL); 487 error = sysctl_string(oldp, oldlenp, newp, newlen, 488 defcorename, sizeof(defcorename)); 489 if (newp && !error) 490 defcorenamelen = newlen; 491 return (error); 492 case KERN_SYNCHRONIZED_IO: 493 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 494 case KERN_IOV_MAX: 495 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 496 case KERN_MBUF: 497 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 498 newp, newlen)); 499 case KERN_MAPPED_FILES: 500 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 501 case KERN_MEMLOCK: 502 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 503 case KERN_MEMLOCK_RANGE: 504 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 505 case KERN_MEMORY_PROTECTION: 506 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 507 case KERN_LOGIN_NAME_MAX: 508 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 509 case KERN_LOGSIGEXIT: 510 return (sysctl_int(oldp, oldlenp, newp, newlen, 511 &kern_logsigexit)); 512 case KERN_FSCALE: 513 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 514 case KERN_CCPU: 515 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 516 case KERN_CP_TIME: 517 #ifndef MULTIPROCESSOR 518 return (sysctl_rdstruct(oldp, oldlenp, newp, 519 curcpu()->ci_schedstate.spc_cp_time, 520 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 521 #else 522 return (sysctl_docptime(oldp, oldlenp, newp)); 523 #endif 524 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 525 case KERN_SYSVIPC_INFO: 526 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 527 #endif 528 case KERN_MSGBUF: 529 return (sysctl_msgbuf(oldp, oldlenp)); 530 case KERN_CONSDEV: 531 if (cn_tab != NULL) 532 consdev = cn_tab->cn_dev; 533 else 534 consdev = NODEV; 535 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 536 sizeof consdev)); 537 #if NPTY > 0 538 case KERN_MAXPTYS: 539 return sysctl_pty(oldp, oldlenp, newp, newlen); 540 #endif 541 #ifdef NEW_PIPE 542 case KERN_PIPE: 543 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 544 newp, newlen)); 545 #endif 546 case KERN_MAXPHYS: 547 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 548 case KERN_SBMAX: 549 { 550 int new_sbmax = sb_max; 551 552 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 553 if (error == 0) { 554 if (new_sbmax < (16 * 1024)) /* sanity */ 555 return (EINVAL); 556 sb_max = new_sbmax; 557 } 558 return (error); 559 } 560 default: 561 return (EOPNOTSUPP); 562 } 563 /* NOTREACHED */ 564 } 565 566 /* 567 * hardware related system variables. 568 */ 569 int 570 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 571 void *newp, size_t newlen, struct proc *p) 572 { 573 574 /* All sysctl names at this level, except for a few, are terminal. */ 575 switch (name[0]) { 576 case HW_DISKSTATS: 577 /* Not terminal. */ 578 break; 579 default: 580 if (namelen != 1) 581 return (ENOTDIR); /* overloaded */ 582 } 583 584 switch (name[0]) { 585 case HW_MACHINE: 586 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 587 case HW_MACHINE_ARCH: 588 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 589 case HW_MODEL: 590 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 591 case HW_NCPU: 592 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 593 case HW_BYTEORDER: 594 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 595 case HW_PHYSMEM: 596 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 597 case HW_USERMEM: 598 return (sysctl_rdint(oldp, oldlenp, newp, 599 ctob(physmem - uvmexp.wired))); 600 case HW_PAGESIZE: 601 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 602 case HW_ALIGNBYTES: 603 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 604 case HW_DISKNAMES: 605 return (sysctl_disknames(oldp, oldlenp)); 606 case HW_DISKSTATS: 607 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 608 case HW_CNMAGIC: { 609 char magic[CNS_LEN]; 610 int error; 611 612 if (oldp) 613 cn_get_magic(magic, CNS_LEN); 614 error = sysctl_string(oldp, oldlenp, newp, newlen, 615 magic, sizeof(magic)); 616 if (newp && !error) { 617 error = cn_set_magic(magic); 618 } 619 return (error); 620 } 621 default: 622 return (EOPNOTSUPP); 623 } 624 /* NOTREACHED */ 625 } 626 627 #ifdef DEBUG 628 /* 629 * Debugging related system variables. 630 */ 631 struct ctldebug debug0, debug1, debug2, debug3, debug4; 632 struct ctldebug debug5, debug6, debug7, debug8, debug9; 633 struct ctldebug debug10, debug11, debug12, debug13, debug14; 634 struct ctldebug debug15, debug16, debug17, debug18, debug19; 635 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 636 &debug0, &debug1, &debug2, &debug3, &debug4, 637 &debug5, &debug6, &debug7, &debug8, &debug9, 638 &debug10, &debug11, &debug12, &debug13, &debug14, 639 &debug15, &debug16, &debug17, &debug18, &debug19, 640 }; 641 642 int 643 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 644 void *newp, size_t newlen, struct proc *p) 645 { 646 struct ctldebug *cdp; 647 648 /* all sysctl names at this level are name and field */ 649 if (namelen != 2) 650 return (ENOTDIR); /* overloaded */ 651 cdp = debugvars[name[0]]; 652 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 653 return (EOPNOTSUPP); 654 switch (name[1]) { 655 case CTL_DEBUG_NAME: 656 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 657 case CTL_DEBUG_VALUE: 658 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 659 default: 660 return (EOPNOTSUPP); 661 } 662 /* NOTREACHED */ 663 } 664 #endif /* DEBUG */ 665 666 int 667 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 668 void *newp, size_t newlen, struct proc *p) 669 { 670 struct proc *ptmp = NULL; 671 const struct proclist_desc *pd; 672 int error = 0; 673 struct rlimit alim; 674 struct plimit *newplim; 675 char *tmps = NULL; 676 int i, curlen, len; 677 678 if (namelen < 2) 679 return EINVAL; 680 681 if (name[0] == PROC_CURPROC) { 682 ptmp = p; 683 } else { 684 proclist_lock_read(); 685 for (pd = proclists; pd->pd_list != NULL; pd++) { 686 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 687 ptmp = LIST_NEXT(ptmp, p_list)) { 688 /* Skip embryonic processes. */ 689 if (ptmp->p_stat == SIDL) 690 continue; 691 if (ptmp->p_pid == (pid_t)name[0]) 692 break; 693 } 694 if (ptmp != NULL) 695 break; 696 } 697 proclist_unlock_read(); 698 if (ptmp == NULL) 699 return(ESRCH); 700 if (p->p_ucred->cr_uid != 0) { 701 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 702 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 703 return EPERM; 704 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 705 return EPERM; /* sgid proc */ 706 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 707 if (p->p_ucred->cr_groups[i] == 708 ptmp->p_cred->p_rgid) 709 break; 710 } 711 if (i == p->p_ucred->cr_ngroups) 712 return EPERM; 713 } 714 } 715 if (name[1] == PROC_PID_CORENAME) { 716 if (namelen != 2) 717 return EINVAL; 718 /* 719 * Can't use sysctl_string() here because we may malloc a new 720 * area during the process, so we have to do it by hand. 721 */ 722 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 723 if (oldlenp && *oldlenp < curlen) { 724 if (!oldp) 725 *oldlenp = curlen; 726 return (ENOMEM); 727 } 728 if (newp) { 729 if (securelevel > 2) 730 return EPERM; 731 if (newlen > MAXPATHLEN) 732 return ENAMETOOLONG; 733 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 734 if (tmps == NULL) 735 return ENOMEM; 736 error = copyin(newp, tmps, newlen + 1); 737 tmps[newlen] = '\0'; 738 if (error) 739 goto cleanup; 740 /* Enforce to be either 'core' for end with '.core' */ 741 if (newlen < 4) { /* c.o.r.e */ 742 error = EINVAL; 743 goto cleanup; 744 } 745 len = newlen - 4; 746 if (len > 0) { 747 if (tmps[len - 1] != '.' && 748 tmps[len - 1] != '/') { 749 error = EINVAL; 750 goto cleanup; 751 } 752 } 753 if (strcmp(&tmps[len], "core") != 0) { 754 error = EINVAL; 755 goto cleanup; 756 } 757 } 758 if (oldp && oldlenp) { 759 *oldlenp = curlen; 760 error = copyout(ptmp->p_limit->pl_corename, oldp, 761 curlen); 762 } 763 if (newp && error == 0) { 764 /* if the 2 strings are identical, don't limcopy() */ 765 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 766 error = 0; 767 goto cleanup; 768 } 769 if (ptmp->p_limit->p_refcnt > 1 && 770 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 771 newplim = limcopy(ptmp->p_limit); 772 limfree(ptmp->p_limit); 773 ptmp->p_limit = newplim; 774 } 775 if (ptmp->p_limit->pl_corename != defcorename) { 776 free(ptmp->p_limit->pl_corename, M_TEMP); 777 } 778 ptmp->p_limit->pl_corename = tmps; 779 return (0); 780 } 781 cleanup: 782 if (tmps) 783 free(tmps, M_TEMP); 784 return (error); 785 } 786 if (name[1] == PROC_PID_LIMIT) { 787 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 788 return EINVAL; 789 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 790 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 791 error = sysctl_quad(oldp, oldlenp, newp, newlen, 792 &alim.rlim_max); 793 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 794 error = sysctl_quad(oldp, oldlenp, newp, newlen, 795 &alim.rlim_cur); 796 else 797 error = EINVAL; 798 799 if (error) 800 return error; 801 802 if (newp) 803 error = dosetrlimit(ptmp, p->p_cred, 804 name[2] - 1, &alim); 805 return error; 806 } 807 return (EINVAL); 808 } 809 810 /* 811 * Convenience macros. 812 */ 813 814 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 815 if (oldlenp) { \ 816 if (!oldp) \ 817 *oldlenp = len; \ 818 else { \ 819 if (*oldlenp < len) \ 820 return(ENOMEM); \ 821 *oldlenp = len; \ 822 error = copyout((caddr_t)valp, oldp, len); \ 823 } \ 824 } 825 826 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 827 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 828 829 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 830 if (newp && newlen != len) \ 831 return (EINVAL); 832 833 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 834 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 835 836 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 837 if (error == 0 && newp) \ 838 error = copyin(newp, valp, len); 839 840 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 841 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 842 843 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 844 if (oldlenp) { \ 845 len = strlen(str) + 1; \ 846 if (!oldp) \ 847 *oldlenp = len; \ 848 else { \ 849 if (*oldlenp < len) { \ 850 err2 = ENOMEM; \ 851 len = *oldlenp; \ 852 } else \ 853 *oldlenp = len; \ 854 error = copyout(str, oldp, len);\ 855 if (error == 0) \ 856 error = err2; \ 857 } \ 858 } 859 860 /* 861 * Validate parameters and get old / set new parameters 862 * for an integer-valued sysctl function. 863 */ 864 int 865 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 866 { 867 int error = 0; 868 869 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 870 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 871 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 872 873 return (error); 874 } 875 876 877 /* 878 * As above, but read-only. 879 */ 880 int 881 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 882 { 883 int error = 0; 884 885 if (newp) 886 return (EPERM); 887 888 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 889 890 return (error); 891 } 892 893 /* 894 * Validate parameters and get old / set new parameters 895 * for an quad-valued sysctl function. 896 */ 897 int 898 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 899 quad_t *valp) 900 { 901 int error = 0; 902 903 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 904 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 905 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 906 907 return (error); 908 } 909 910 /* 911 * As above, but read-only. 912 */ 913 int 914 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 915 { 916 int error = 0; 917 918 if (newp) 919 return (EPERM); 920 921 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 922 923 return (error); 924 } 925 926 /* 927 * Validate parameters and get old / set new parameters 928 * for a string-valued sysctl function. 929 */ 930 int 931 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 932 int maxlen) 933 { 934 int len, error = 0, err2 = 0; 935 936 if (newp && newlen >= maxlen) 937 return (EINVAL); 938 939 SYSCTL_STRING_CORE(oldp, oldlenp, str); 940 941 if (error == 0 && newp) { 942 error = copyin(newp, str, newlen); 943 str[newlen] = 0; 944 } 945 return (error); 946 } 947 948 /* 949 * As above, but read-only. 950 */ 951 int 952 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 953 { 954 int len, error = 0, err2 = 0; 955 956 if (newp) 957 return (EPERM); 958 959 SYSCTL_STRING_CORE(oldp, oldlenp, str); 960 961 return (error); 962 } 963 964 /* 965 * Validate parameters and get old / set new parameters 966 * for a structure oriented sysctl function. 967 */ 968 int 969 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 970 int len) 971 { 972 int error = 0; 973 974 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 975 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 976 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 977 978 return (error); 979 } 980 981 /* 982 * Validate parameters and get old parameters 983 * for a structure oriented sysctl function. 984 */ 985 int 986 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 987 int len) 988 { 989 int error = 0; 990 991 if (newp) 992 return (EPERM); 993 994 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 995 996 return (error); 997 } 998 999 /* 1000 * As above, but can return a truncated result. 1001 */ 1002 int 1003 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1004 int len) 1005 { 1006 int error = 0; 1007 1008 if (newp) 1009 return (EPERM); 1010 1011 len = min(*oldlenp, len); 1012 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1013 1014 return (error); 1015 } 1016 1017 /* 1018 * Get file structures. 1019 */ 1020 static int 1021 sysctl_file(void *vwhere, size_t *sizep) 1022 { 1023 int buflen, error; 1024 struct file *fp; 1025 char *start, *where; 1026 1027 start = where = vwhere; 1028 buflen = *sizep; 1029 if (where == NULL) { 1030 /* 1031 * overestimate by 10 files 1032 */ 1033 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1034 return (0); 1035 } 1036 1037 /* 1038 * first copyout filehead 1039 */ 1040 if (buflen < sizeof(filehead)) { 1041 *sizep = 0; 1042 return (0); 1043 } 1044 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1045 if (error) 1046 return (error); 1047 buflen -= sizeof(filehead); 1048 where += sizeof(filehead); 1049 1050 /* 1051 * followed by an array of file structures 1052 */ 1053 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1054 if (buflen < sizeof(struct file)) { 1055 *sizep = where - start; 1056 return (ENOMEM); 1057 } 1058 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1059 if (error) 1060 return (error); 1061 buflen -= sizeof(struct file); 1062 where += sizeof(struct file); 1063 } 1064 *sizep = where - start; 1065 return (0); 1066 } 1067 1068 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1069 #define FILL_PERM(src, dst) do { \ 1070 (dst)._key = (src)._key; \ 1071 (dst).uid = (src).uid; \ 1072 (dst).gid = (src).gid; \ 1073 (dst).cuid = (src).cuid; \ 1074 (dst).cgid = (src).cgid; \ 1075 (dst).mode = (src).mode; \ 1076 (dst)._seq = (src)._seq; \ 1077 } while (0); 1078 #define FILL_MSG(src, dst) do { \ 1079 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1080 (dst).msg_qnum = (src).msg_qnum; \ 1081 (dst).msg_qbytes = (src).msg_qbytes; \ 1082 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1083 (dst).msg_lspid = (src).msg_lspid; \ 1084 (dst).msg_lrpid = (src).msg_lrpid; \ 1085 (dst).msg_stime = (src).msg_stime; \ 1086 (dst).msg_rtime = (src).msg_rtime; \ 1087 (dst).msg_ctime = (src).msg_ctime; \ 1088 } while (0) 1089 #define FILL_SEM(src, dst) do { \ 1090 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1091 (dst).sem_nsems = (src).sem_nsems; \ 1092 (dst).sem_otime = (src).sem_otime; \ 1093 (dst).sem_ctime = (src).sem_ctime; \ 1094 } while (0) 1095 #define FILL_SHM(src, dst) do { \ 1096 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1097 (dst).shm_segsz = (src).shm_segsz; \ 1098 (dst).shm_lpid = (src).shm_lpid; \ 1099 (dst).shm_cpid = (src).shm_cpid; \ 1100 (dst).shm_atime = (src).shm_atime; \ 1101 (dst).shm_dtime = (src).shm_dtime; \ 1102 (dst).shm_ctime = (src).shm_ctime; \ 1103 (dst).shm_nattch = (src).shm_nattch; \ 1104 } while (0) 1105 1106 static int 1107 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1108 { 1109 #ifdef SYSVMSG 1110 struct msg_sysctl_info *msgsi; 1111 #endif 1112 #ifdef SYSVSEM 1113 struct sem_sysctl_info *semsi; 1114 #endif 1115 #ifdef SYSVSHM 1116 struct shm_sysctl_info *shmsi; 1117 #endif 1118 size_t infosize, dssize, tsize, buflen; 1119 void *buf = NULL, *buf2; 1120 char *start; 1121 int32_t nds; 1122 int i, error, ret; 1123 1124 if (namelen != 1) 1125 return (EINVAL); 1126 1127 start = where; 1128 buflen = *sizep; 1129 1130 switch (*name) { 1131 case KERN_SYSVIPC_MSG_INFO: 1132 #ifdef SYSVMSG 1133 infosize = sizeof(msgsi->msginfo); 1134 nds = msginfo.msgmni; 1135 dssize = sizeof(msgsi->msgids[0]); 1136 break; 1137 #else 1138 return (EINVAL); 1139 #endif 1140 case KERN_SYSVIPC_SEM_INFO: 1141 #ifdef SYSVSEM 1142 infosize = sizeof(semsi->seminfo); 1143 nds = seminfo.semmni; 1144 dssize = sizeof(semsi->semids[0]); 1145 break; 1146 #else 1147 return (EINVAL); 1148 #endif 1149 case KERN_SYSVIPC_SHM_INFO: 1150 #ifdef SYSVSHM 1151 infosize = sizeof(shmsi->shminfo); 1152 nds = shminfo.shmmni; 1153 dssize = sizeof(shmsi->shmids[0]); 1154 break; 1155 #else 1156 return (EINVAL); 1157 #endif 1158 default: 1159 return (EINVAL); 1160 } 1161 /* 1162 * Round infosize to 64 bit boundary if requesting more than just 1163 * the info structure or getting the total data size. 1164 */ 1165 if (where == NULL || *sizep > infosize) 1166 infosize = ((infosize + 7) / 8) * 8; 1167 tsize = infosize + nds * dssize; 1168 1169 /* Return just the total size required. */ 1170 if (where == NULL) { 1171 *sizep = tsize; 1172 return (0); 1173 } 1174 1175 /* Not enough room for even the info struct. */ 1176 if (buflen < infosize) { 1177 *sizep = 0; 1178 return (ENOMEM); 1179 } 1180 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1181 memset(buf, 0, min(tsize, buflen)); 1182 1183 switch (*name) { 1184 #ifdef SYSVMSG 1185 case KERN_SYSVIPC_MSG_INFO: 1186 msgsi = (struct msg_sysctl_info *)buf; 1187 buf2 = &msgsi->msgids[0]; 1188 msgsi->msginfo = msginfo; 1189 break; 1190 #endif 1191 #ifdef SYSVSEM 1192 case KERN_SYSVIPC_SEM_INFO: 1193 semsi = (struct sem_sysctl_info *)buf; 1194 buf2 = &semsi->semids[0]; 1195 semsi->seminfo = seminfo; 1196 break; 1197 #endif 1198 #ifdef SYSVSHM 1199 case KERN_SYSVIPC_SHM_INFO: 1200 shmsi = (struct shm_sysctl_info *)buf; 1201 buf2 = &shmsi->shmids[0]; 1202 shmsi->shminfo = shminfo; 1203 break; 1204 #endif 1205 } 1206 buflen -= infosize; 1207 1208 ret = 0; 1209 if (buflen > 0) { 1210 /* Fill in the IPC data structures. */ 1211 for (i = 0; i < nds; i++) { 1212 if (buflen < dssize) { 1213 ret = ENOMEM; 1214 break; 1215 } 1216 switch (*name) { 1217 #ifdef SYSVMSG 1218 case KERN_SYSVIPC_MSG_INFO: 1219 FILL_MSG(msqids[i], msgsi->msgids[i]); 1220 break; 1221 #endif 1222 #ifdef SYSVSEM 1223 case KERN_SYSVIPC_SEM_INFO: 1224 FILL_SEM(sema[i], semsi->semids[i]); 1225 break; 1226 #endif 1227 #ifdef SYSVSHM 1228 case KERN_SYSVIPC_SHM_INFO: 1229 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1230 break; 1231 #endif 1232 } 1233 buflen -= dssize; 1234 } 1235 } 1236 *sizep -= buflen; 1237 error = copyout(buf, start, *sizep); 1238 /* If copyout succeeded, use return code set earlier. */ 1239 if (error == 0) 1240 error = ret; 1241 if (buf) 1242 free(buf, M_TEMP); 1243 return (error); 1244 } 1245 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1246 1247 static int 1248 sysctl_msgbuf(void *vwhere, size_t *sizep) 1249 { 1250 char *where = vwhere; 1251 size_t len, maxlen = *sizep; 1252 long beg, end; 1253 int error; 1254 1255 /* 1256 * deal with cases where the message buffer has 1257 * become corrupted. 1258 */ 1259 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1260 msgbufenabled = 0; 1261 return (ENXIO); 1262 } 1263 1264 if (where == NULL) { 1265 /* always return full buffer size */ 1266 *sizep = msgbufp->msg_bufs; 1267 return (0); 1268 } 1269 1270 error = 0; 1271 maxlen = min(msgbufp->msg_bufs, maxlen); 1272 1273 /* 1274 * First, copy from the write pointer to the end of 1275 * message buffer. 1276 */ 1277 beg = msgbufp->msg_bufx; 1278 end = msgbufp->msg_bufs; 1279 while (maxlen > 0) { 1280 len = min(end - beg, maxlen); 1281 if (len == 0) 1282 break; 1283 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1284 if (error) 1285 break; 1286 where += len; 1287 maxlen -= len; 1288 1289 /* 1290 * ... then, copy from the beginning of message buffer to 1291 * the write pointer. 1292 */ 1293 beg = 0; 1294 end = msgbufp->msg_bufx; 1295 } 1296 return (error); 1297 } 1298 1299 /* 1300 * try over estimating by 5 procs 1301 */ 1302 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1303 1304 static int 1305 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1306 { 1307 struct eproc eproc; 1308 struct kinfo_proc2 kproc2; 1309 struct kinfo_proc *dp; 1310 struct proc *p; 1311 const struct proclist_desc *pd; 1312 char *where, *dp2; 1313 int type, op, arg, elem_size, elem_count; 1314 int buflen, needed, error; 1315 1316 dp = vwhere; 1317 dp2 = where = vwhere; 1318 buflen = where != NULL ? *sizep : 0; 1319 error = needed = 0; 1320 type = name[0]; 1321 1322 if (type == KERN_PROC) { 1323 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1324 return (EINVAL); 1325 op = name[1]; 1326 if (op != KERN_PROC_ALL) 1327 arg = name[2]; 1328 } else { 1329 if (namelen != 5) 1330 return (EINVAL); 1331 op = name[1]; 1332 arg = name[2]; 1333 elem_size = name[3]; 1334 elem_count = name[4]; 1335 } 1336 1337 proclist_lock_read(); 1338 1339 pd = proclists; 1340 again: 1341 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1342 /* 1343 * Skip embryonic processes. 1344 */ 1345 if (p->p_stat == SIDL) 1346 continue; 1347 /* 1348 * TODO - make more efficient (see notes below). 1349 * do by session. 1350 */ 1351 switch (op) { 1352 1353 case KERN_PROC_PID: 1354 /* could do this with just a lookup */ 1355 if (p->p_pid != (pid_t)arg) 1356 continue; 1357 break; 1358 1359 case KERN_PROC_PGRP: 1360 /* could do this by traversing pgrp */ 1361 if (p->p_pgrp->pg_id != (pid_t)arg) 1362 continue; 1363 break; 1364 1365 case KERN_PROC_SESSION: 1366 if (p->p_session->s_sid != (pid_t)arg) 1367 continue; 1368 break; 1369 1370 case KERN_PROC_TTY: 1371 if (arg == KERN_PROC_TTY_REVOKE) { 1372 if ((p->p_flag & P_CONTROLT) == 0 || 1373 p->p_session->s_ttyp == NULL || 1374 p->p_session->s_ttyvp != NULL) 1375 continue; 1376 } else if ((p->p_flag & P_CONTROLT) == 0 || 1377 p->p_session->s_ttyp == NULL) { 1378 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1379 continue; 1380 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1381 continue; 1382 break; 1383 1384 case KERN_PROC_UID: 1385 if (p->p_ucred->cr_uid != (uid_t)arg) 1386 continue; 1387 break; 1388 1389 case KERN_PROC_RUID: 1390 if (p->p_cred->p_ruid != (uid_t)arg) 1391 continue; 1392 break; 1393 1394 case KERN_PROC_GID: 1395 if (p->p_ucred->cr_gid != (uid_t)arg) 1396 continue; 1397 break; 1398 1399 case KERN_PROC_RGID: 1400 if (p->p_cred->p_rgid != (uid_t)arg) 1401 continue; 1402 break; 1403 1404 case KERN_PROC_ALL: 1405 /* allow everything */ 1406 break; 1407 1408 default: 1409 error = EINVAL; 1410 goto cleanup; 1411 } 1412 if (type == KERN_PROC) { 1413 if (buflen >= sizeof(struct kinfo_proc)) { 1414 fill_eproc(p, &eproc); 1415 error = copyout((caddr_t)p, &dp->kp_proc, 1416 sizeof(struct proc)); 1417 if (error) 1418 goto cleanup; 1419 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1420 sizeof(eproc)); 1421 if (error) 1422 goto cleanup; 1423 dp++; 1424 buflen -= sizeof(struct kinfo_proc); 1425 } 1426 needed += sizeof(struct kinfo_proc); 1427 } else { /* KERN_PROC2 */ 1428 if (buflen >= elem_size && elem_count > 0) { 1429 fill_kproc2(p, &kproc2); 1430 /* 1431 * Copy out elem_size, but not larger than 1432 * the size of a struct kinfo_proc2. 1433 */ 1434 error = copyout(&kproc2, dp2, 1435 min(sizeof(kproc2), elem_size)); 1436 if (error) 1437 goto cleanup; 1438 dp2 += elem_size; 1439 buflen -= elem_size; 1440 elem_count--; 1441 } 1442 needed += elem_size; 1443 } 1444 } 1445 pd++; 1446 if (pd->pd_list != NULL) 1447 goto again; 1448 proclist_unlock_read(); 1449 1450 if (where != NULL) { 1451 if (type == KERN_PROC) 1452 *sizep = (caddr_t)dp - where; 1453 else 1454 *sizep = dp2 - where; 1455 if (needed > *sizep) 1456 return (ENOMEM); 1457 } else { 1458 needed += KERN_PROCSLOP; 1459 *sizep = needed; 1460 } 1461 return (0); 1462 cleanup: 1463 proclist_unlock_read(); 1464 return (error); 1465 } 1466 1467 /* 1468 * Fill in an eproc structure for the specified process. 1469 */ 1470 void 1471 fill_eproc(struct proc *p, struct eproc *ep) 1472 { 1473 struct tty *tp; 1474 1475 ep->e_paddr = p; 1476 ep->e_sess = p->p_session; 1477 ep->e_pcred = *p->p_cred; 1478 ep->e_ucred = *p->p_ucred; 1479 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1480 ep->e_vm.vm_rssize = 0; 1481 ep->e_vm.vm_tsize = 0; 1482 ep->e_vm.vm_dsize = 0; 1483 ep->e_vm.vm_ssize = 0; 1484 /* ep->e_vm.vm_pmap = XXX; */ 1485 } else { 1486 struct vmspace *vm = p->p_vmspace; 1487 1488 ep->e_vm.vm_rssize = vm_resident_count(vm); 1489 ep->e_vm.vm_tsize = vm->vm_tsize; 1490 ep->e_vm.vm_dsize = vm->vm_dsize; 1491 ep->e_vm.vm_ssize = vm->vm_ssize; 1492 } 1493 if (p->p_pptr) 1494 ep->e_ppid = p->p_pptr->p_pid; 1495 else 1496 ep->e_ppid = 0; 1497 ep->e_pgid = p->p_pgrp->pg_id; 1498 ep->e_sid = ep->e_sess->s_sid; 1499 ep->e_jobc = p->p_pgrp->pg_jobc; 1500 if ((p->p_flag & P_CONTROLT) && 1501 (tp = ep->e_sess->s_ttyp)) { 1502 ep->e_tdev = tp->t_dev; 1503 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1504 ep->e_tsess = tp->t_session; 1505 } else 1506 ep->e_tdev = NODEV; 1507 if (p->p_wmesg) 1508 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1509 ep->e_xsize = ep->e_xrssize = 0; 1510 ep->e_xccount = ep->e_xswrss = 0; 1511 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1512 if (SESS_LEADER(p)) 1513 ep->e_flag |= EPROC_SLEADER; 1514 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1515 } 1516 1517 /* 1518 * Fill in an eproc structure for the specified process. 1519 */ 1520 static void 1521 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1522 { 1523 struct tty *tp; 1524 1525 memset(ki, 0, sizeof(*ki)); 1526 1527 ki->p_forw = PTRTOINT64(p->p_forw); 1528 ki->p_back = PTRTOINT64(p->p_back); 1529 ki->p_paddr = PTRTOINT64(p); 1530 1531 ki->p_addr = PTRTOINT64(p->p_addr); 1532 ki->p_fd = PTRTOINT64(p->p_fd); 1533 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1534 ki->p_stats = PTRTOINT64(p->p_stats); 1535 ki->p_limit = PTRTOINT64(p->p_limit); 1536 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1537 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1538 ki->p_sess = PTRTOINT64(p->p_session); 1539 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1540 ki->p_ru = PTRTOINT64(p->p_ru); 1541 1542 ki->p_eflag = 0; 1543 ki->p_exitsig = p->p_exitsig; 1544 ki->p_flag = p->p_flag; 1545 1546 ki->p_pid = p->p_pid; 1547 if (p->p_pptr) 1548 ki->p_ppid = p->p_pptr->p_pid; 1549 else 1550 ki->p_ppid = 0; 1551 ki->p_sid = p->p_session->s_sid; 1552 ki->p__pgid = p->p_pgrp->pg_id; 1553 1554 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1555 1556 ki->p_uid = p->p_ucred->cr_uid; 1557 ki->p_ruid = p->p_cred->p_ruid; 1558 ki->p_gid = p->p_ucred->cr_gid; 1559 ki->p_rgid = p->p_cred->p_rgid; 1560 1561 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1562 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1563 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1564 1565 ki->p_jobc = p->p_pgrp->pg_jobc; 1566 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1567 ki->p_tdev = tp->t_dev; 1568 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1569 ki->p_tsess = PTRTOINT64(tp->t_session); 1570 } else { 1571 ki->p_tdev = NODEV; 1572 } 1573 1574 ki->p_estcpu = p->p_estcpu; 1575 ki->p_rtime_sec = p->p_rtime.tv_sec; 1576 ki->p_rtime_usec = p->p_rtime.tv_usec; 1577 ki->p_cpticks = p->p_cpticks; 1578 ki->p_pctcpu = p->p_pctcpu; 1579 ki->p_swtime = p->p_swtime; 1580 ki->p_slptime = p->p_slptime; 1581 if (p->p_stat == SONPROC) { 1582 KDASSERT(p->p_cpu != NULL); 1583 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1584 } else 1585 ki->p_schedflags = 0; 1586 1587 ki->p_uticks = p->p_uticks; 1588 ki->p_sticks = p->p_sticks; 1589 ki->p_iticks = p->p_iticks; 1590 1591 ki->p_tracep = PTRTOINT64(p->p_tracep); 1592 ki->p_traceflag = p->p_traceflag; 1593 1594 ki->p_holdcnt = p->p_holdcnt; 1595 1596 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1597 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1598 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1599 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1600 1601 ki->p_stat = p->p_stat; 1602 ki->p_priority = p->p_priority; 1603 ki->p_usrpri = p->p_usrpri; 1604 ki->p_nice = p->p_nice; 1605 1606 ki->p_xstat = p->p_xstat; 1607 ki->p_acflag = p->p_acflag; 1608 1609 strncpy(ki->p_comm, p->p_comm, 1610 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1611 1612 if (p->p_wmesg) 1613 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1614 ki->p_wchan = PTRTOINT64(p->p_wchan); 1615 1616 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1617 1618 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1619 ki->p_vm_rssize = 0; 1620 ki->p_vm_tsize = 0; 1621 ki->p_vm_dsize = 0; 1622 ki->p_vm_ssize = 0; 1623 } else { 1624 struct vmspace *vm = p->p_vmspace; 1625 1626 ki->p_vm_rssize = vm_resident_count(vm); 1627 ki->p_vm_tsize = vm->vm_tsize; 1628 ki->p_vm_dsize = vm->vm_dsize; 1629 ki->p_vm_ssize = vm->vm_ssize; 1630 } 1631 1632 if (p->p_session->s_ttyvp) 1633 ki->p_eflag |= EPROC_CTTY; 1634 if (SESS_LEADER(p)) 1635 ki->p_eflag |= EPROC_SLEADER; 1636 1637 /* XXX Is this double check necessary? */ 1638 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1639 ki->p_uvalid = 0; 1640 } else { 1641 ki->p_uvalid = 1; 1642 1643 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1644 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1645 1646 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1647 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1648 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1649 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1650 1651 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1652 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1653 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1654 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1655 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1656 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1657 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1658 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1659 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1660 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1661 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1662 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1663 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1664 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1665 1666 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1667 p->p_stats->p_cru.ru_stime.tv_sec; 1668 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1669 p->p_stats->p_cru.ru_stime.tv_usec; 1670 } 1671 #ifdef MULTIPROCESSOR 1672 if (p->p_cpu != NULL) 1673 ki->p_cpuid = p->p_cpu->ci_cpuid; 1674 else 1675 #endif 1676 ki->p_cpuid = KI_NOCPU; 1677 } 1678 1679 int 1680 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1681 struct proc *up) 1682 { 1683 struct ps_strings pss; 1684 struct proc *p; 1685 size_t len, upper_bound, xlen; 1686 struct uio auio; 1687 struct iovec aiov; 1688 vaddr_t argv; 1689 pid_t pid; 1690 int nargv, type, error, i; 1691 char *arg; 1692 char *tmp; 1693 1694 if (namelen != 2) 1695 return (EINVAL); 1696 pid = name[0]; 1697 type = name[1]; 1698 1699 switch (type) { 1700 case KERN_PROC_ARGV: 1701 case KERN_PROC_NARGV: 1702 case KERN_PROC_ENV: 1703 case KERN_PROC_NENV: 1704 /* ok */ 1705 break; 1706 default: 1707 return (EINVAL); 1708 } 1709 1710 /* check pid */ 1711 if ((p = pfind(pid)) == NULL) 1712 return (EINVAL); 1713 1714 /* only root or same user change look at the environment */ 1715 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1716 if (up->p_ucred->cr_uid != 0) { 1717 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1718 up->p_cred->p_ruid != p->p_cred->p_svuid) 1719 return (EPERM); 1720 } 1721 } 1722 1723 if (sizep != NULL && where == NULL) { 1724 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1725 *sizep = sizeof (int); 1726 else 1727 *sizep = ARG_MAX; /* XXX XXX XXX */ 1728 return (0); 1729 } 1730 if (where == NULL || sizep == NULL) 1731 return (EINVAL); 1732 1733 /* 1734 * Zombies don't have a stack, so we can't read their psstrings. 1735 * System processes also don't have a user stack. 1736 */ 1737 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1738 return (EINVAL); 1739 1740 /* 1741 * Lock the process down in memory. 1742 */ 1743 /* XXXCDC: how should locking work here? */ 1744 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1745 return (EFAULT); 1746 p->p_vmspace->vm_refcnt++; /* XXX */ 1747 1748 /* 1749 * Allocate a temporary buffer to hold the arguments. 1750 */ 1751 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1752 1753 /* 1754 * Read in the ps_strings structure. 1755 */ 1756 aiov.iov_base = &pss; 1757 aiov.iov_len = sizeof(pss); 1758 auio.uio_iov = &aiov; 1759 auio.uio_iovcnt = 1; 1760 auio.uio_offset = (vaddr_t)p->p_psstr; 1761 auio.uio_resid = sizeof(pss); 1762 auio.uio_segflg = UIO_SYSSPACE; 1763 auio.uio_rw = UIO_READ; 1764 auio.uio_procp = NULL; 1765 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1766 if (error) 1767 goto done; 1768 1769 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1770 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1771 else 1772 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1773 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1774 error = copyout(&nargv, where, sizeof(nargv)); 1775 *sizep = sizeof(nargv); 1776 goto done; 1777 } 1778 /* 1779 * Now read the address of the argument vector. 1780 */ 1781 switch (type) { 1782 case KERN_PROC_ARGV: 1783 /* XXX compat32 stuff here */ 1784 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1785 break; 1786 case KERN_PROC_ENV: 1787 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1788 break; 1789 default: 1790 return (EINVAL); 1791 } 1792 auio.uio_offset = (off_t)(long)tmp; 1793 aiov.iov_base = &argv; 1794 aiov.iov_len = sizeof(argv); 1795 auio.uio_iov = &aiov; 1796 auio.uio_iovcnt = 1; 1797 auio.uio_resid = sizeof(argv); 1798 auio.uio_segflg = UIO_SYSSPACE; 1799 auio.uio_rw = UIO_READ; 1800 auio.uio_procp = NULL; 1801 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1802 if (error) 1803 goto done; 1804 1805 /* 1806 * Now copy in the actual argument vector, one page at a time, 1807 * since we don't know how long the vector is (though, we do 1808 * know how many NUL-terminated strings are in the vector). 1809 */ 1810 len = 0; 1811 upper_bound = *sizep; 1812 for (; nargv != 0 && len < upper_bound; len += xlen) { 1813 aiov.iov_base = arg; 1814 aiov.iov_len = PAGE_SIZE; 1815 auio.uio_iov = &aiov; 1816 auio.uio_iovcnt = 1; 1817 auio.uio_offset = argv + len; 1818 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1819 auio.uio_resid = xlen; 1820 auio.uio_segflg = UIO_SYSSPACE; 1821 auio.uio_rw = UIO_READ; 1822 auio.uio_procp = NULL; 1823 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1824 if (error) 1825 goto done; 1826 1827 for (i = 0; i < xlen && nargv != 0; i++) { 1828 if (arg[i] == '\0') 1829 nargv--; /* one full string */ 1830 } 1831 1832 /* make sure we don't copyout past the end of the user's buffer */ 1833 if (len + i > upper_bound) 1834 i = upper_bound - len; 1835 1836 error = copyout(arg, (char *)where + len, i); 1837 if (error) 1838 break; 1839 1840 if (nargv == 0) { 1841 len += i; 1842 break; 1843 } 1844 } 1845 *sizep = len; 1846 1847 done: 1848 uvmspace_free(p->p_vmspace); 1849 1850 free(arg, M_TEMP); 1851 return (error); 1852 } 1853 1854 #if NPTY > 0 1855 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1856 1857 /* 1858 * Validate parameters and get old / set new parameters 1859 * for pty sysctl function. 1860 */ 1861 static int 1862 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 1863 { 1864 int error = 0; 1865 int oldmax = 0, newmax = 0; 1866 1867 /* get current value of maxptys */ 1868 oldmax = pty_maxptys(0, 0); 1869 1870 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1871 1872 if (!error && newp) { 1873 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1874 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1875 1876 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1877 return (EINVAL); 1878 1879 } 1880 1881 return (error); 1882 } 1883 #endif /* NPTY > 0 */ 1884
Indexes created Thu Sep 25 08:09:54 GMT 2025