kern_sysctl.c revision 1.86.2.9
1 /* $NetBSD: kern_sysctl.c,v 1.86.2.9 2001/09/26 19:55:05 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 "opt_ddb.h" 46 #include "opt_insecure.h" 47 #include "opt_defcorename.h" 48 #include "opt_new_pipe.h" 49 #include "opt_sysv.h" 50 #include "pty.h" 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/kernel.h> 55 #include <sys/buf.h> 56 #include <sys/device.h> 57 #include <sys/disklabel.h> 58 #include <sys/dkstat.h> 59 #include <sys/exec.h> 60 #include <sys/file.h> 61 #include <sys/ioctl.h> 62 #include <sys/malloc.h> 63 #include <sys/mount.h> 64 #include <sys/msgbuf.h> 65 #include <sys/pool.h> 66 #include <sys/lwp.h> 67 #include <sys/proc.h> 68 #include <sys/resource.h> 69 #include <sys/resourcevar.h> 70 #include <sys/syscallargs.h> 71 #include <sys/tty.h> 72 #include <sys/unistd.h> 73 #include <sys/vnode.h> 74 #include <sys/socketvar.h> 75 #define __SYSCTL_PRIVATE 76 #include <sys/sysctl.h> 77 #include <sys/lock.h> 78 #include <sys/namei.h> 79 80 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 81 #include <sys/ipc.h> 82 #endif 83 #ifdef SYSVMSG 84 #include <sys/msg.h> 85 #endif 86 #ifdef SYSVSEM 87 #include <sys/sem.h> 88 #endif 89 #ifdef SYSVSHM 90 #include <sys/shm.h> 91 #endif 92 93 #include <dev/cons.h> 94 95 #if defined(DDB) 96 #include <ddb/ddbvar.h> 97 #endif 98 99 #ifdef NEW_PIPE 100 #include <sys/pipe.h> 101 #endif 102 103 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 104 105 static int sysctl_file(void *, size_t *); 106 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 107 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 108 #endif 109 static int sysctl_msgbuf(void *, size_t *); 110 static int sysctl_doeproc(int *, u_int, void *, size_t *); 111 #ifdef MULTIPROCESSOR 112 static int sysctl_docptime(void *, size_t *, void *); 113 static int sysctl_ncpus(void); 114 #endif 115 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 116 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 117 #if NPTY > 0 118 static int sysctl_pty(void *, size_t *, void *, size_t); 119 #endif 120 121 static struct lwp *proc_representative_lwp(struct proc *); 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 lwp *l, 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 struct proc *p = l->l_proc; 150 int error; 151 size_t savelen = 0, oldlen = 0; 152 sysctlfn *fn; 153 int name[CTL_MAXNAME]; 154 size_t *oldlenp; 155 156 /* 157 * all top-level sysctl names are non-terminal 158 */ 159 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 160 return (EINVAL); 161 error = copyin(SCARG(uap, name), &name, 162 SCARG(uap, namelen) * sizeof(int)); 163 if (error) 164 return (error); 165 166 /* 167 * For all but CTL_PROC, must be root to change a value. 168 * For CTL_PROC, must be root, or owner of the proc (and not suid), 169 * this is checked in proc_sysctl() (once we know the targer proc). 170 */ 171 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 172 (error = suser(p->p_ucred, &p->p_acflag))) 173 return error; 174 175 switch (name[0]) { 176 case CTL_KERN: 177 fn = kern_sysctl; 178 break; 179 case CTL_HW: 180 fn = hw_sysctl; 181 break; 182 case CTL_VM: 183 fn = uvm_sysctl; 184 break; 185 case CTL_NET: 186 fn = net_sysctl; 187 break; 188 case CTL_VFS: 189 fn = vfs_sysctl; 190 break; 191 case CTL_MACHDEP: 192 fn = cpu_sysctl; 193 break; 194 #ifdef DEBUG 195 case CTL_DEBUG: 196 fn = debug_sysctl; 197 break; 198 #endif 199 #ifdef DDB 200 case CTL_DDB: 201 fn = ddb_sysctl; 202 break; 203 #endif 204 case CTL_PROC: 205 fn = proc_sysctl; 206 break; 207 default: 208 return (EOPNOTSUPP); 209 } 210 211 /* 212 * XXX Hey, we wire `old', but what about `new'? 213 */ 214 215 oldlenp = SCARG(uap, oldlenp); 216 if (oldlenp) { 217 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 218 return (error); 219 oldlenp = &oldlen; 220 } 221 if (SCARG(uap, old) != NULL) { 222 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 223 if (error) 224 return (error); 225 error = uvm_vslock(p, SCARG(uap, old), oldlen, 226 VM_PROT_READ|VM_PROT_WRITE); 227 if (error) { 228 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 229 return error; 230 } 231 savelen = oldlen; 232 } 233 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 234 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 235 if (SCARG(uap, old) != NULL) { 236 uvm_vsunlock(p, SCARG(uap, old), savelen); 237 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 238 } 239 if (error) 240 return (error); 241 if (SCARG(uap, oldlenp)) 242 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 243 return (error); 244 } 245 246 /* 247 * Attributes stored in the kernel. 248 */ 249 char hostname[MAXHOSTNAMELEN]; 250 int hostnamelen; 251 252 char domainname[MAXHOSTNAMELEN]; 253 int domainnamelen; 254 255 long hostid; 256 257 #ifdef INSECURE 258 int securelevel = -1; 259 #else 260 int securelevel = 0; 261 #endif 262 263 #ifndef DEFCORENAME 264 #define DEFCORENAME "%n.core" 265 #endif 266 char defcorename[MAXPATHLEN] = DEFCORENAME; 267 int defcorenamelen = sizeof(DEFCORENAME); 268 269 extern int kern_logsigexit; 270 extern fixpt_t ccpu; 271 272 #ifndef MULTIPROCESSOR 273 #define sysctl_ncpus() 1 274 #endif 275 276 #ifdef MULTIPROCESSOR 277 278 #ifndef CPU_INFO_FOREACH 279 #define CPU_INFO_ITERATOR int 280 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 281 #endif 282 283 static int 284 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 285 { 286 u_int64_t cp_time[CPUSTATES]; 287 int i; 288 struct cpu_info *ci; 289 CPU_INFO_ITERATOR cii; 290 291 for (i=0; i<CPUSTATES; i++) 292 cp_time[i] = 0; 293 294 for (CPU_INFO_FOREACH(cii, ci)) { 295 for (i=0; i<CPUSTATES; i++) 296 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 297 } 298 return (sysctl_rdstruct(oldp, oldlenp, newp, 299 cp_time, sizeof(cp_time))); 300 } 301 302 static int 303 sysctl_ncpus(void) 304 { 305 struct cpu_info *ci; 306 CPU_INFO_ITERATOR cii; 307 308 int ncpus = 0; 309 for (CPU_INFO_FOREACH(cii, ci)) 310 ncpus++; 311 return ncpus; 312 } 313 314 #endif 315 316 /* 317 * kernel related system variables. 318 */ 319 int 320 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 321 void *newp, size_t newlen, struct proc *p) 322 { 323 int error, level, inthostid; 324 int old_autonicetime; 325 int old_vnodes; 326 dev_t consdev; 327 328 /* All sysctl names at this level, except for a few, are terminal. */ 329 switch (name[0]) { 330 case KERN_PROC: 331 case KERN_PROC2: 332 case KERN_PROF: 333 case KERN_MBUF: 334 case KERN_PROC_ARGS: 335 case KERN_SYSVIPC_INFO: 336 case KERN_PIPE: 337 /* Not terminal. */ 338 break; 339 default: 340 if (namelen != 1) 341 return (ENOTDIR); /* overloaded */ 342 } 343 344 switch (name[0]) { 345 case KERN_OSTYPE: 346 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 347 case KERN_OSRELEASE: 348 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 349 case KERN_OSREV: 350 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 351 case KERN_VERSION: 352 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 353 case KERN_MAXVNODES: 354 old_vnodes = desiredvnodes; 355 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 356 if (old_vnodes > desiredvnodes) { 357 desiredvnodes = old_vnodes; 358 return (EINVAL); 359 } 360 if (error == 0) { 361 vfs_reinit(); 362 nchreinit(); 363 } 364 return (error); 365 case KERN_MAXPROC: 366 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 367 case KERN_MAXFILES: 368 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 369 case KERN_ARGMAX: 370 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 371 case KERN_SECURELVL: 372 level = securelevel; 373 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 374 newp == NULL) 375 return (error); 376 if (level < securelevel && p->p_pid != 1) 377 return (EPERM); 378 securelevel = level; 379 return (0); 380 case KERN_HOSTNAME: 381 error = sysctl_string(oldp, oldlenp, newp, newlen, 382 hostname, sizeof(hostname)); 383 if (newp && !error) 384 hostnamelen = newlen; 385 return (error); 386 case KERN_DOMAINNAME: 387 error = sysctl_string(oldp, oldlenp, newp, newlen, 388 domainname, sizeof(domainname)); 389 if (newp && !error) 390 domainnamelen = newlen; 391 return (error); 392 case KERN_HOSTID: 393 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 394 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 395 hostid = inthostid; 396 return (error); 397 case KERN_CLOCKRATE: 398 return (sysctl_clockrate(oldp, oldlenp)); 399 case KERN_BOOTTIME: 400 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 401 sizeof(struct timeval))); 402 case KERN_VNODE: 403 return (sysctl_vnode(oldp, oldlenp, p)); 404 case KERN_PROC: 405 case KERN_PROC2: 406 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 407 case KERN_PROC_ARGS: 408 return (sysctl_procargs(name + 1, namelen - 1, 409 oldp, oldlenp, p)); 410 case KERN_FILE: 411 return (sysctl_file(oldp, oldlenp)); 412 #ifdef GPROF 413 case KERN_PROF: 414 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 415 newp, newlen)); 416 #endif 417 case KERN_POSIX1: 418 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 419 case KERN_NGROUPS: 420 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 421 case KERN_JOB_CONTROL: 422 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 423 case KERN_SAVED_IDS: 424 #ifdef _POSIX_SAVED_IDS 425 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 426 #else 427 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 428 #endif 429 case KERN_MAXPARTITIONS: 430 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 431 case KERN_RAWPARTITION: 432 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 433 #ifdef NTP 434 case KERN_NTPTIME: 435 return (sysctl_ntptime(oldp, oldlenp)); 436 #endif 437 case KERN_AUTONICETIME: 438 old_autonicetime = autonicetime; 439 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 440 if (autonicetime < 0) 441 autonicetime = old_autonicetime; 442 return (error); 443 case KERN_AUTONICEVAL: 444 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 445 if (autoniceval < PRIO_MIN) 446 autoniceval = PRIO_MIN; 447 if (autoniceval > PRIO_MAX) 448 autoniceval = PRIO_MAX; 449 return (error); 450 case KERN_RTC_OFFSET: 451 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 452 case KERN_ROOT_DEVICE: 453 return (sysctl_rdstring(oldp, oldlenp, newp, 454 root_device->dv_xname)); 455 case KERN_MSGBUFSIZE: 456 /* 457 * deal with cases where the message buffer has 458 * become corrupted. 459 */ 460 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 461 msgbufenabled = 0; 462 return (ENXIO); 463 } 464 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 465 case KERN_FSYNC: 466 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 467 case KERN_SYSVMSG: 468 #ifdef SYSVMSG 469 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 470 #else 471 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 472 #endif 473 case KERN_SYSVSEM: 474 #ifdef SYSVSEM 475 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 476 #else 477 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 478 #endif 479 case KERN_SYSVSHM: 480 #ifdef SYSVSHM 481 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 482 #else 483 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 484 #endif 485 case KERN_DEFCORENAME: 486 if (newp && newlen < 1) 487 return (EINVAL); 488 error = sysctl_string(oldp, oldlenp, newp, newlen, 489 defcorename, sizeof(defcorename)); 490 if (newp && !error) 491 defcorenamelen = newlen; 492 return (error); 493 case KERN_SYNCHRONIZED_IO: 494 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 495 case KERN_IOV_MAX: 496 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 497 case KERN_MBUF: 498 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 499 newp, newlen)); 500 case KERN_MAPPED_FILES: 501 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 502 case KERN_MEMLOCK: 503 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 504 case KERN_MEMLOCK_RANGE: 505 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 506 case KERN_MEMORY_PROTECTION: 507 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 508 case KERN_LOGIN_NAME_MAX: 509 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 510 case KERN_LOGSIGEXIT: 511 return (sysctl_int(oldp, oldlenp, newp, newlen, 512 &kern_logsigexit)); 513 case KERN_FSCALE: 514 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 515 case KERN_CCPU: 516 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 517 case KERN_CP_TIME: 518 #ifndef MULTIPROCESSOR 519 return (sysctl_rdstruct(oldp, oldlenp, newp, 520 curcpu()->ci_schedstate.spc_cp_time, 521 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 522 #else 523 return (sysctl_docptime(oldp, oldlenp, newp)); 524 #endif 525 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 526 case KERN_SYSVIPC_INFO: 527 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 528 #endif 529 case KERN_MSGBUF: 530 return (sysctl_msgbuf(oldp, oldlenp)); 531 case KERN_CONSDEV: 532 if (cn_tab != NULL) 533 consdev = cn_tab->cn_dev; 534 else 535 consdev = NODEV; 536 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 537 sizeof consdev)); 538 #if NPTY > 0 539 case KERN_MAXPTYS: 540 return sysctl_pty(oldp, oldlenp, newp, newlen); 541 #endif 542 #ifdef NEW_PIPE 543 case KERN_PIPE: 544 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 545 newp, newlen)); 546 #endif 547 case KERN_MAXPHYS: 548 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 549 case KERN_SBMAX: 550 { 551 int new_sbmax = sb_max; 552 553 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 554 if (error == 0) { 555 if (new_sbmax < (16 * 1024)) /* sanity */ 556 return (EINVAL); 557 sb_max = new_sbmax; 558 } 559 return (error); 560 } 561 default: 562 return (EOPNOTSUPP); 563 } 564 /* NOTREACHED */ 565 } 566 567 /* 568 * hardware related system variables. 569 */ 570 int 571 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 572 void *newp, size_t newlen, struct proc *p) 573 { 574 575 /* all sysctl names at this level are terminal */ 576 if (namelen != 1) 577 return (ENOTDIR); /* overloaded */ 578 579 switch (name[0]) { 580 case HW_MACHINE: 581 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 582 case HW_MACHINE_ARCH: 583 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 584 case HW_MODEL: 585 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 586 case HW_NCPU: 587 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 588 case HW_BYTEORDER: 589 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 590 case HW_PHYSMEM: 591 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 592 case HW_USERMEM: 593 return (sysctl_rdint(oldp, oldlenp, newp, 594 ctob(physmem - uvmexp.wired))); 595 case HW_PAGESIZE: 596 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 597 case HW_ALIGNBYTES: 598 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 599 case HW_CNMAGIC: { 600 char magic[CNS_LEN]; 601 int error; 602 603 if (oldp) 604 cn_get_magic(magic, CNS_LEN); 605 error = sysctl_string(oldp, oldlenp, newp, newlen, 606 magic, sizeof(magic)); 607 if (newp && !error) { 608 error = cn_set_magic(magic); 609 } 610 return (error); 611 } 612 default: 613 return (EOPNOTSUPP); 614 } 615 /* NOTREACHED */ 616 } 617 618 #ifdef DEBUG 619 /* 620 * Debugging related system variables. 621 */ 622 struct ctldebug debug0, debug1, debug2, debug3, debug4; 623 struct ctldebug debug5, debug6, debug7, debug8, debug9; 624 struct ctldebug debug10, debug11, debug12, debug13, debug14; 625 struct ctldebug debug15, debug16, debug17, debug18, debug19; 626 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 627 &debug0, &debug1, &debug2, &debug3, &debug4, 628 &debug5, &debug6, &debug7, &debug8, &debug9, 629 &debug10, &debug11, &debug12, &debug13, &debug14, 630 &debug15, &debug16, &debug17, &debug18, &debug19, 631 }; 632 633 int 634 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 635 void *newp, size_t newlen, struct proc *p) 636 { 637 struct ctldebug *cdp; 638 639 /* all sysctl names at this level are name and field */ 640 if (namelen != 2) 641 return (ENOTDIR); /* overloaded */ 642 cdp = debugvars[name[0]]; 643 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 644 return (EOPNOTSUPP); 645 switch (name[1]) { 646 case CTL_DEBUG_NAME: 647 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 648 case CTL_DEBUG_VALUE: 649 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 650 default: 651 return (EOPNOTSUPP); 652 } 653 /* NOTREACHED */ 654 } 655 #endif /* DEBUG */ 656 657 int 658 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 659 void *newp, size_t newlen, struct proc *p) 660 { 661 struct proc *ptmp = NULL; 662 const struct proclist_desc *pd; 663 int error = 0; 664 struct rlimit alim; 665 struct plimit *newplim; 666 char *tmps = NULL; 667 int i, curlen, len; 668 669 if (namelen < 2) 670 return EINVAL; 671 672 if (name[0] == PROC_CURPROC) { 673 ptmp = p; 674 } else { 675 proclist_lock_read(); 676 for (pd = proclists; pd->pd_list != NULL; pd++) { 677 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 678 ptmp = LIST_NEXT(ptmp, p_list)) { 679 /* Skip embryonic processes. */ 680 if (ptmp->p_stat == SIDL) 681 continue; 682 if (ptmp->p_pid == (pid_t)name[0]) 683 break; 684 } 685 if (ptmp != NULL) 686 break; 687 } 688 proclist_unlock_read(); 689 if (ptmp == NULL) 690 return(ESRCH); 691 if (p->p_ucred->cr_uid != 0) { 692 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 693 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 694 return EPERM; 695 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 696 return EPERM; /* sgid proc */ 697 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 698 if (p->p_ucred->cr_groups[i] == 699 ptmp->p_cred->p_rgid) 700 break; 701 } 702 if (i == p->p_ucred->cr_ngroups) 703 return EPERM; 704 } 705 } 706 if (name[1] == PROC_PID_CORENAME) { 707 if (namelen != 2) 708 return EINVAL; 709 /* 710 * Can't use sysctl_string() here because we may malloc a new 711 * area during the process, so we have to do it by hand. 712 */ 713 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 714 if (oldlenp && *oldlenp < curlen) { 715 if (!oldp) 716 *oldlenp = curlen; 717 return (ENOMEM); 718 } 719 if (newp) { 720 if (securelevel > 2) 721 return EPERM; 722 if (newlen > MAXPATHLEN) 723 return ENAMETOOLONG; 724 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 725 if (tmps == NULL) 726 return ENOMEM; 727 error = copyin(newp, tmps, newlen + 1); 728 tmps[newlen] = '\0'; 729 if (error) 730 goto cleanup; 731 /* Enforce to be either 'core' for end with '.core' */ 732 if (newlen < 4) { /* c.o.r.e */ 733 error = EINVAL; 734 goto cleanup; 735 } 736 len = newlen - 4; 737 if (len > 0) { 738 if (tmps[len - 1] != '.' && 739 tmps[len - 1] != '/') { 740 error = EINVAL; 741 goto cleanup; 742 } 743 } 744 if (strcmp(&tmps[len], "core") != 0) { 745 error = EINVAL; 746 goto cleanup; 747 } 748 } 749 if (oldp && oldlenp) { 750 *oldlenp = curlen; 751 error = copyout(ptmp->p_limit->pl_corename, oldp, 752 curlen); 753 } 754 if (newp && error == 0) { 755 /* if the 2 strings are identical, don't limcopy() */ 756 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 757 error = 0; 758 goto cleanup; 759 } 760 if (ptmp->p_limit->p_refcnt > 1 && 761 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 762 newplim = limcopy(ptmp->p_limit); 763 limfree(ptmp->p_limit); 764 ptmp->p_limit = newplim; 765 } else if (ptmp->p_limit->pl_corename != defcorename) { 766 free(ptmp->p_limit->pl_corename, M_TEMP); 767 } 768 ptmp->p_limit->pl_corename = tmps; 769 return (0); 770 } 771 cleanup: 772 if (tmps) 773 free(tmps, M_TEMP); 774 return (error); 775 } 776 if (name[1] == PROC_PID_LIMIT) { 777 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 778 return EINVAL; 779 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 780 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 781 error = sysctl_quad(oldp, oldlenp, newp, newlen, 782 &alim.rlim_max); 783 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 784 error = sysctl_quad(oldp, oldlenp, newp, newlen, 785 &alim.rlim_cur); 786 else 787 error = EINVAL; 788 789 if (error) 790 return error; 791 792 if (newp) 793 error = dosetrlimit(ptmp, p->p_cred, 794 name[2] - 1, &alim); 795 return error; 796 } 797 return (EINVAL); 798 } 799 800 /* 801 * Convenience macros. 802 */ 803 804 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 805 if (oldlenp) { \ 806 if (!oldp) \ 807 *oldlenp = len; \ 808 else { \ 809 if (*oldlenp < len) \ 810 return(ENOMEM); \ 811 *oldlenp = len; \ 812 error = copyout((caddr_t)valp, oldp, len); \ 813 } \ 814 } 815 816 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 817 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 818 819 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 820 if (newp && newlen != len) \ 821 return (EINVAL); 822 823 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 824 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 825 826 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 827 if (error == 0 && newp) \ 828 error = copyin(newp, valp, len); 829 830 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 831 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 832 833 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 834 if (oldlenp) { \ 835 len = strlen(str) + 1; \ 836 if (!oldp) \ 837 *oldlenp = len; \ 838 else { \ 839 if (*oldlenp < len) { \ 840 err2 = ENOMEM; \ 841 len = *oldlenp; \ 842 } else \ 843 *oldlenp = len; \ 844 error = copyout(str, oldp, len);\ 845 if (error == 0) \ 846 error = err2; \ 847 } \ 848 } 849 850 /* 851 * Validate parameters and get old / set new parameters 852 * for an integer-valued sysctl function. 853 */ 854 int 855 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 856 { 857 int error = 0; 858 859 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 860 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 861 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 862 863 return (error); 864 } 865 866 867 /* 868 * As above, but read-only. 869 */ 870 int 871 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 872 { 873 int error = 0; 874 875 if (newp) 876 return (EPERM); 877 878 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 879 880 return (error); 881 } 882 883 /* 884 * Validate parameters and get old / set new parameters 885 * for an quad-valued sysctl function. 886 */ 887 int 888 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 889 quad_t *valp) 890 { 891 int error = 0; 892 893 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 894 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 895 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 896 897 return (error); 898 } 899 900 /* 901 * As above, but read-only. 902 */ 903 int 904 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 905 { 906 int error = 0; 907 908 if (newp) 909 return (EPERM); 910 911 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 912 913 return (error); 914 } 915 916 /* 917 * Validate parameters and get old / set new parameters 918 * for a string-valued sysctl function. 919 */ 920 int 921 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 922 int maxlen) 923 { 924 int len, error = 0, err2 = 0; 925 926 if (newp && newlen >= maxlen) 927 return (EINVAL); 928 929 SYSCTL_STRING_CORE(oldp, oldlenp, str); 930 931 if (error == 0 && newp) { 932 error = copyin(newp, str, newlen); 933 str[newlen] = 0; 934 } 935 return (error); 936 } 937 938 /* 939 * As above, but read-only. 940 */ 941 int 942 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 943 { 944 int len, error = 0, err2 = 0; 945 946 if (newp) 947 return (EPERM); 948 949 SYSCTL_STRING_CORE(oldp, oldlenp, str); 950 951 return (error); 952 } 953 954 /* 955 * Validate parameters and get old / set new parameters 956 * for a structure oriented sysctl function. 957 */ 958 int 959 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 960 int len) 961 { 962 int error = 0; 963 964 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 965 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 966 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 967 968 return (error); 969 } 970 971 /* 972 * Validate parameters and get old parameters 973 * for a structure oriented sysctl function. 974 */ 975 int 976 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 977 int len) 978 { 979 int error = 0; 980 981 if (newp) 982 return (EPERM); 983 984 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 985 986 return (error); 987 } 988 989 /* 990 * As above, but can return a truncated result. 991 */ 992 int 993 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 994 int len) 995 { 996 int error = 0; 997 998 if (newp) 999 return (EPERM); 1000 1001 len = min(*oldlenp, len); 1002 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1003 1004 return (error); 1005 } 1006 1007 /* 1008 * Get file structures. 1009 */ 1010 static int 1011 sysctl_file(void *vwhere, size_t *sizep) 1012 { 1013 int buflen, error; 1014 struct file *fp; 1015 char *start, *where; 1016 1017 start = where = vwhere; 1018 buflen = *sizep; 1019 if (where == NULL) { 1020 /* 1021 * overestimate by 10 files 1022 */ 1023 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1024 return (0); 1025 } 1026 1027 /* 1028 * first copyout filehead 1029 */ 1030 if (buflen < sizeof(filehead)) { 1031 *sizep = 0; 1032 return (0); 1033 } 1034 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1035 if (error) 1036 return (error); 1037 buflen -= sizeof(filehead); 1038 where += sizeof(filehead); 1039 1040 /* 1041 * followed by an array of file structures 1042 */ 1043 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1044 if (buflen < sizeof(struct file)) { 1045 *sizep = where - start; 1046 return (ENOMEM); 1047 } 1048 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1049 if (error) 1050 return (error); 1051 buflen -= sizeof(struct file); 1052 where += sizeof(struct file); 1053 } 1054 *sizep = where - start; 1055 return (0); 1056 } 1057 1058 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1059 #define FILL_PERM(src, dst) do { \ 1060 (dst)._key = (src)._key; \ 1061 (dst).uid = (src).uid; \ 1062 (dst).gid = (src).gid; \ 1063 (dst).cuid = (src).cuid; \ 1064 (dst).cgid = (src).cgid; \ 1065 (dst).mode = (src).mode; \ 1066 (dst)._seq = (src)._seq; \ 1067 } while (0); 1068 #define FILL_MSG(src, dst) do { \ 1069 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1070 (dst).msg_qnum = (src).msg_qnum; \ 1071 (dst).msg_qbytes = (src).msg_qbytes; \ 1072 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1073 (dst).msg_lspid = (src).msg_lspid; \ 1074 (dst).msg_lrpid = (src).msg_lrpid; \ 1075 (dst).msg_stime = (src).msg_stime; \ 1076 (dst).msg_rtime = (src).msg_rtime; \ 1077 (dst).msg_ctime = (src).msg_ctime; \ 1078 } while (0) 1079 #define FILL_SEM(src, dst) do { \ 1080 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1081 (dst).sem_nsems = (src).sem_nsems; \ 1082 (dst).sem_otime = (src).sem_otime; \ 1083 (dst).sem_ctime = (src).sem_ctime; \ 1084 } while (0) 1085 #define FILL_SHM(src, dst) do { \ 1086 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1087 (dst).shm_segsz = (src).shm_segsz; \ 1088 (dst).shm_lpid = (src).shm_lpid; \ 1089 (dst).shm_cpid = (src).shm_cpid; \ 1090 (dst).shm_atime = (src).shm_atime; \ 1091 (dst).shm_dtime = (src).shm_dtime; \ 1092 (dst).shm_ctime = (src).shm_ctime; \ 1093 (dst).shm_nattch = (src).shm_nattch; \ 1094 } while (0) 1095 1096 static int 1097 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1098 { 1099 #ifdef SYSVMSG 1100 struct msg_sysctl_info *msgsi; 1101 #endif 1102 #ifdef SYSVSEM 1103 struct sem_sysctl_info *semsi; 1104 #endif 1105 #ifdef SYSVSHM 1106 struct shm_sysctl_info *shmsi; 1107 #endif 1108 size_t infosize, dssize, tsize, buflen; 1109 void *buf = NULL, *buf2; 1110 char *start; 1111 int32_t nds; 1112 int i, error, ret; 1113 1114 if (namelen != 1) 1115 return (EINVAL); 1116 1117 start = where; 1118 buflen = *sizep; 1119 1120 switch (*name) { 1121 case KERN_SYSVIPC_MSG_INFO: 1122 #ifdef SYSVMSG 1123 infosize = sizeof(msgsi->msginfo); 1124 nds = msginfo.msgmni; 1125 dssize = sizeof(msgsi->msgids[0]); 1126 break; 1127 #else 1128 return (EINVAL); 1129 #endif 1130 case KERN_SYSVIPC_SEM_INFO: 1131 #ifdef SYSVSEM 1132 infosize = sizeof(semsi->seminfo); 1133 nds = seminfo.semmni; 1134 dssize = sizeof(semsi->semids[0]); 1135 break; 1136 #else 1137 return (EINVAL); 1138 #endif 1139 case KERN_SYSVIPC_SHM_INFO: 1140 #ifdef SYSVSHM 1141 infosize = sizeof(shmsi->shminfo); 1142 nds = shminfo.shmmni; 1143 dssize = sizeof(shmsi->shmids[0]); 1144 break; 1145 #else 1146 return (EINVAL); 1147 #endif 1148 default: 1149 return (EINVAL); 1150 } 1151 /* 1152 * Round infosize to 64 bit boundary if requesting more than just 1153 * the info structure or getting the total data size. 1154 */ 1155 if (where == NULL || *sizep > infosize) 1156 infosize = ((infosize + 7) / 8) * 8; 1157 tsize = infosize + nds * dssize; 1158 1159 /* Return just the total size required. */ 1160 if (where == NULL) { 1161 *sizep = tsize; 1162 return (0); 1163 } 1164 1165 /* Not enough room for even the info struct. */ 1166 if (buflen < infosize) { 1167 *sizep = 0; 1168 return (ENOMEM); 1169 } 1170 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1171 memset(buf, 0, min(tsize, buflen)); 1172 1173 switch (*name) { 1174 #ifdef SYSVMSG 1175 case KERN_SYSVIPC_MSG_INFO: 1176 msgsi = (struct msg_sysctl_info *)buf; 1177 buf2 = &msgsi->msgids[0]; 1178 msgsi->msginfo = msginfo; 1179 break; 1180 #endif 1181 #ifdef SYSVSEM 1182 case KERN_SYSVIPC_SEM_INFO: 1183 semsi = (struct sem_sysctl_info *)buf; 1184 buf2 = &semsi->semids[0]; 1185 semsi->seminfo = seminfo; 1186 break; 1187 #endif 1188 #ifdef SYSVSHM 1189 case KERN_SYSVIPC_SHM_INFO: 1190 shmsi = (struct shm_sysctl_info *)buf; 1191 buf2 = &shmsi->shmids[0]; 1192 shmsi->shminfo = shminfo; 1193 break; 1194 #endif 1195 } 1196 buflen -= infosize; 1197 1198 ret = 0; 1199 if (buflen > 0) { 1200 /* Fill in the IPC data structures. */ 1201 for (i = 0; i < nds; i++) { 1202 if (buflen < dssize) { 1203 ret = ENOMEM; 1204 break; 1205 } 1206 switch (*name) { 1207 #ifdef SYSVMSG 1208 case KERN_SYSVIPC_MSG_INFO: 1209 FILL_MSG(msqids[i], msgsi->msgids[i]); 1210 break; 1211 #endif 1212 #ifdef SYSVSEM 1213 case KERN_SYSVIPC_SEM_INFO: 1214 FILL_SEM(sema[i], semsi->semids[i]); 1215 break; 1216 #endif 1217 #ifdef SYSVSHM 1218 case KERN_SYSVIPC_SHM_INFO: 1219 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1220 break; 1221 #endif 1222 } 1223 buflen -= dssize; 1224 } 1225 } 1226 *sizep -= buflen; 1227 error = copyout(buf, start, *sizep); 1228 /* If copyout succeeded, use return code set earlier. */ 1229 if (error == 0) 1230 error = ret; 1231 if (buf) 1232 free(buf, M_TEMP); 1233 return (error); 1234 } 1235 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1236 1237 static int 1238 sysctl_msgbuf(void *vwhere, size_t *sizep) 1239 { 1240 char *where = vwhere; 1241 size_t len, maxlen = *sizep; 1242 long beg, end; 1243 int error; 1244 1245 /* 1246 * deal with cases where the message buffer has 1247 * become corrupted. 1248 */ 1249 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1250 msgbufenabled = 0; 1251 return (ENXIO); 1252 } 1253 1254 if (where == NULL) { 1255 /* always return full buffer size */ 1256 *sizep = msgbufp->msg_bufs; 1257 return (0); 1258 } 1259 1260 error = 0; 1261 maxlen = min(msgbufp->msg_bufs, maxlen); 1262 1263 /* 1264 * First, copy from the write pointer to the end of 1265 * message buffer. 1266 */ 1267 beg = msgbufp->msg_bufx; 1268 end = msgbufp->msg_bufs; 1269 while (maxlen > 0) { 1270 len = min(end - beg, maxlen); 1271 if (len == 0) 1272 break; 1273 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1274 if (error) 1275 break; 1276 where += len; 1277 maxlen -= len; 1278 1279 /* 1280 * ... then, copy from the beginning of message buffer to 1281 * the write pointer. 1282 */ 1283 beg = 0; 1284 end = msgbufp->msg_bufx; 1285 } 1286 return (error); 1287 } 1288 1289 /* 1290 * try over estimating by 5 procs 1291 */ 1292 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1293 1294 static int 1295 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1296 { 1297 struct eproc eproc; 1298 struct kinfo_proc2 kproc2; 1299 struct kinfo_proc *dp; 1300 struct proc *p; 1301 const struct proclist_desc *pd; 1302 char *where, *dp2; 1303 int type, op, arg, elem_size, elem_count; 1304 int buflen, needed, error; 1305 1306 dp = vwhere; 1307 dp2 = where = vwhere; 1308 buflen = where != NULL ? *sizep : 0; 1309 error = needed = 0; 1310 type = name[0]; 1311 1312 if (type == KERN_PROC) { 1313 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1314 return (EINVAL); 1315 op = name[1]; 1316 if (op != KERN_PROC_ALL) 1317 arg = name[2]; 1318 } else { 1319 if (namelen != 5) 1320 return (EINVAL); 1321 op = name[1]; 1322 arg = name[2]; 1323 elem_size = name[3]; 1324 elem_count = name[4]; 1325 } 1326 1327 proclist_lock_read(); 1328 1329 pd = proclists; 1330 again: 1331 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1332 /* 1333 * Skip embryonic processes. 1334 */ 1335 if (p->p_stat == SIDL) 1336 continue; 1337 /* 1338 * TODO - make more efficient (see notes below). 1339 * do by session. 1340 */ 1341 switch (op) { 1342 1343 case KERN_PROC_PID: 1344 /* could do this with just a lookup */ 1345 if (p->p_pid != (pid_t)arg) 1346 continue; 1347 break; 1348 1349 case KERN_PROC_PGRP: 1350 /* could do this by traversing pgrp */ 1351 if (p->p_pgrp->pg_id != (pid_t)arg) 1352 continue; 1353 break; 1354 1355 case KERN_PROC_SESSION: 1356 if (p->p_session->s_sid != (pid_t)arg) 1357 continue; 1358 break; 1359 1360 case KERN_PROC_TTY: 1361 if (arg == KERN_PROC_TTY_REVOKE) { 1362 if ((p->p_flag & P_CONTROLT) == 0 || 1363 p->p_session->s_ttyp == NULL || 1364 p->p_session->s_ttyvp != NULL) 1365 continue; 1366 } else if ((p->p_flag & P_CONTROLT) == 0 || 1367 p->p_session->s_ttyp == NULL) { 1368 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1369 continue; 1370 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1371 continue; 1372 break; 1373 1374 case KERN_PROC_UID: 1375 if (p->p_ucred->cr_uid != (uid_t)arg) 1376 continue; 1377 break; 1378 1379 case KERN_PROC_RUID: 1380 if (p->p_cred->p_ruid != (uid_t)arg) 1381 continue; 1382 break; 1383 1384 case KERN_PROC_GID: 1385 if (p->p_ucred->cr_gid != (uid_t)arg) 1386 continue; 1387 break; 1388 1389 case KERN_PROC_RGID: 1390 if (p->p_cred->p_rgid != (uid_t)arg) 1391 continue; 1392 break; 1393 1394 case KERN_PROC_ALL: 1395 /* allow everything */ 1396 break; 1397 1398 default: 1399 error = EINVAL; 1400 goto cleanup; 1401 } 1402 if (type == KERN_PROC) { 1403 if (buflen >= sizeof(struct kinfo_proc)) { 1404 fill_eproc(p, &eproc); 1405 error = copyout((caddr_t)p, &dp->kp_proc, 1406 sizeof(struct proc)); 1407 if (error) 1408 goto cleanup; 1409 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1410 sizeof(eproc)); 1411 if (error) 1412 goto cleanup; 1413 dp++; 1414 buflen -= sizeof(struct kinfo_proc); 1415 } 1416 needed += sizeof(struct kinfo_proc); 1417 } else { /* KERN_PROC2 */ 1418 if (buflen >= elem_size && elem_count > 0) { 1419 fill_kproc2(p, &kproc2); 1420 /* 1421 * Copy out elem_size, but not larger than 1422 * the size of a struct kinfo_proc2. 1423 */ 1424 error = copyout(&kproc2, dp2, 1425 min(sizeof(kproc2), elem_size)); 1426 if (error) 1427 goto cleanup; 1428 dp2 += elem_size; 1429 buflen -= elem_size; 1430 elem_count--; 1431 } 1432 needed += elem_size; 1433 } 1434 } 1435 pd++; 1436 if (pd->pd_list != NULL) 1437 goto again; 1438 proclist_unlock_read(); 1439 1440 if (where != NULL) { 1441 if (type == KERN_PROC) 1442 *sizep = (caddr_t)dp - where; 1443 else 1444 *sizep = dp2 - where; 1445 if (needed > *sizep) 1446 return (ENOMEM); 1447 } else { 1448 needed += KERN_PROCSLOP; 1449 *sizep = needed; 1450 } 1451 return (0); 1452 cleanup: 1453 proclist_unlock_read(); 1454 return (error); 1455 } 1456 1457 /* 1458 * Fill in an eproc structure for the specified process. 1459 */ 1460 void 1461 fill_eproc(struct proc *p, struct eproc *ep) 1462 { 1463 struct tty *tp; 1464 struct lwp *l; 1465 1466 ep->e_paddr = p; 1467 ep->e_sess = p->p_session; 1468 ep->e_pcred = *p->p_cred; 1469 ep->e_ucred = *p->p_ucred; 1470 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1471 ep->e_vm.vm_rssize = 0; 1472 ep->e_vm.vm_tsize = 0; 1473 ep->e_vm.vm_dsize = 0; 1474 ep->e_vm.vm_ssize = 0; 1475 /* ep->e_vm.vm_pmap = XXX; */ 1476 } else { 1477 struct vmspace *vm = p->p_vmspace; 1478 1479 ep->e_vm.vm_rssize = vm_resident_count(vm); 1480 ep->e_vm.vm_tsize = vm->vm_tsize; 1481 ep->e_vm.vm_dsize = vm->vm_dsize; 1482 ep->e_vm.vm_ssize = vm->vm_ssize; 1483 1484 /* Pick a "representative" LWP */ 1485 l = proc_representative_lwp(p); 1486 1487 if (l->l_wmesg) 1488 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1489 } 1490 if (p->p_pptr) 1491 ep->e_ppid = p->p_pptr->p_pid; 1492 else 1493 ep->e_ppid = 0; 1494 ep->e_pgid = p->p_pgrp->pg_id; 1495 ep->e_sid = ep->e_sess->s_sid; 1496 ep->e_jobc = p->p_pgrp->pg_jobc; 1497 if ((p->p_flag & P_CONTROLT) && 1498 (tp = ep->e_sess->s_ttyp)) { 1499 ep->e_tdev = tp->t_dev; 1500 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1501 ep->e_tsess = tp->t_session; 1502 } else 1503 ep->e_tdev = NODEV; 1504 1505 ep->e_xsize = ep->e_xrssize = 0; 1506 ep->e_xccount = ep->e_xswrss = 0; 1507 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1508 if (SESS_LEADER(p)) 1509 ep->e_flag |= EPROC_SLEADER; 1510 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1511 } 1512 1513 /* 1514 * Fill in an eproc structure for the specified process. 1515 */ 1516 static void 1517 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1518 { 1519 struct tty *tp; 1520 struct lwp *l; 1521 memset(ki, 0, sizeof(*ki)); 1522 1523 /* XXX NJWLWP 1524 * These are likely not what the caller was looking for. 1525 * The perils of playing with the kernel data structures... 1526 */ 1527 ki->p_paddr = PTRTOINT64(p); 1528 ki->p_fd = PTRTOINT64(p->p_fd); 1529 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1530 ki->p_stats = PTRTOINT64(p->p_stats); 1531 ki->p_limit = PTRTOINT64(p->p_limit); 1532 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1533 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1534 ki->p_sess = PTRTOINT64(p->p_session); 1535 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1536 ki->p_ru = PTRTOINT64(p->p_ru); 1537 1538 ki->p_eflag = 0; 1539 ki->p_exitsig = p->p_exitsig; 1540 ki->p_flag = p->p_flag; 1541 1542 ki->p_pid = p->p_pid; 1543 if (p->p_pptr) 1544 ki->p_ppid = p->p_pptr->p_pid; 1545 else 1546 ki->p_ppid = 0; 1547 ki->p_sid = p->p_session->s_sid; 1548 ki->p__pgid = p->p_pgrp->pg_id; 1549 1550 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1551 1552 ki->p_uid = p->p_ucred->cr_uid; 1553 ki->p_ruid = p->p_cred->p_ruid; 1554 ki->p_gid = p->p_ucred->cr_gid; 1555 ki->p_rgid = p->p_cred->p_rgid; 1556 1557 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1558 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1559 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1560 1561 ki->p_jobc = p->p_pgrp->pg_jobc; 1562 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1563 ki->p_tdev = tp->t_dev; 1564 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1565 ki->p_tsess = PTRTOINT64(tp->t_session); 1566 } else { 1567 ki->p_tdev = NODEV; 1568 } 1569 1570 ki->p_estcpu = p->p_estcpu; 1571 ki->p_rtime_sec = p->p_rtime.tv_sec; 1572 ki->p_rtime_usec = p->p_rtime.tv_usec; 1573 ki->p_cpticks = p->p_cpticks; 1574 ki->p_pctcpu = p->p_pctcpu; 1575 1576 ki->p_uticks = p->p_uticks; 1577 ki->p_sticks = p->p_sticks; 1578 ki->p_iticks = p->p_iticks; 1579 1580 ki->p_tracep = PTRTOINT64(p->p_tracep); 1581 ki->p_traceflag = p->p_traceflag; 1582 1583 1584 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1585 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1586 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1587 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1588 1589 ki->p_stat = p->p_stat; 1590 ki->p_nice = p->p_nice; 1591 1592 ki->p_xstat = p->p_xstat; 1593 ki->p_acflag = p->p_acflag; 1594 1595 strncpy(ki->p_comm, p->p_comm, 1596 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1597 1598 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1599 1600 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1601 ki->p_vm_rssize = 0; 1602 ki->p_vm_tsize = 0; 1603 ki->p_vm_dsize = 0; 1604 ki->p_vm_ssize = 0; 1605 } else { 1606 struct vmspace *vm = p->p_vmspace; 1607 1608 ki->p_vm_rssize = vm_resident_count(vm); 1609 ki->p_vm_tsize = vm->vm_tsize; 1610 ki->p_vm_dsize = vm->vm_dsize; 1611 ki->p_vm_ssize = vm->vm_ssize; 1612 1613 /* Pick a "representative" LWP */ 1614 l = proc_representative_lwp(p); 1615 ki->p_forw = PTRTOINT64(l->l_forw); 1616 ki->p_back = PTRTOINT64(l->l_back); 1617 ki->p_addr = PTRTOINT64(l->l_addr); 1618 ki->p_stat = l->l_stat; 1619 ki->p_flag |= l->l_flag; 1620 ki->p_swtime = l->l_swtime; 1621 ki->p_slptime = l->l_slptime; 1622 if (l->l_stat == LSONPROC) { 1623 KDASSERT(l->l_cpu != NULL); 1624 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1625 } else 1626 ki->p_schedflags = 0; 1627 ki->p_holdcnt = l->l_holdcnt; 1628 ki->p_priority = l->l_priority; 1629 ki->p_usrpri = l->l_usrpri; 1630 if (l->l_wmesg) 1631 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1632 ki->p_wchan = PTRTOINT64(l->l_wchan); 1633 1634 } 1635 1636 if (p->p_session->s_ttyvp) 1637 ki->p_eflag |= EPROC_CTTY; 1638 if (SESS_LEADER(p)) 1639 ki->p_eflag |= EPROC_SLEADER; 1640 1641 /* XXX Is this double check necessary? */ 1642 if (P_ZOMBIE(p)) { 1643 ki->p_uvalid = 0; 1644 } else { 1645 ki->p_uvalid = 1; 1646 1647 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1648 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1649 1650 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1651 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1652 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1653 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1654 1655 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1656 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1657 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1658 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1659 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1660 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1661 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1662 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1663 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1664 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1665 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1666 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1667 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1668 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1669 1670 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1671 p->p_stats->p_cru.ru_stime.tv_sec; 1672 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1673 p->p_stats->p_cru.ru_stime.tv_usec; 1674 } 1675 #ifdef MULTIPROCESSOR 1676 if (p->p_cpu != NULL) 1677 ki->p_cpuid = p->p_cpu->ci_cpuid; 1678 else 1679 #endif 1680 ki->p_cpuid = KI_NOCPU; 1681 1682 } 1683 1684 1685 /* 1686 * Pick a LWP to represent the process for those operations which 1687 * want information about a "process" that is actually associated 1688 * with a LWP. 1689 */ 1690 static struct lwp *proc_representative_lwp(p) 1691 struct proc *p; 1692 { 1693 struct lwp *l = NULL; 1694 1695 /* Trivial case: only one LWP */ 1696 if (p->p_nrlwps == 1) 1697 return (LIST_FIRST(&p->p_lwps)); 1698 1699 switch (p->p_stat) { 1700 case SSTOP: 1701 /* Pick the first stopped LWP */ 1702 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1703 if (l->l_stat == LSSTOP) 1704 return (l); 1705 } 1706 /* NOTREACHED */ 1707 break; 1708 case SACTIVE: 1709 /* Pick the first live LWP */ 1710 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1711 if (l->l_stat == LSRUN || 1712 l->l_stat == LSSLEEP || 1713 l->l_stat == LSONPROC || 1714 l->l_stat == LSSUSPENDED) 1715 return (l); 1716 } 1717 break; 1718 case SDEAD: 1719 case SZOMB: 1720 /* Doesn't really matter... */ 1721 l = LIST_FIRST(&p->p_lwps); 1722 break; 1723 #ifdef DIAGNOSTIC 1724 case SIDL: 1725 /* We have more than one LWP and we're in SIDL? 1726 * How'd that happen? 1727 */ 1728 panic("Too many LWPs (%d) in SIDL process %d (%s)", 1729 p->p_nrlwps, p->p_pid, p->p_comm); 1730 default: 1731 panic("Process %d (%s) in unknown state %d", 1732 p->p_pid, p->p_comm, p->p_stat); 1733 #endif 1734 } 1735 1736 panic("proc_representative_lwp: couldn't find a lwp for process" 1737 " %d (%s)", p->p_pid, p->p_comm); 1738 /* NOTREACHED */ 1739 return NULL; 1740 } 1741 1742 1743 int 1744 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1745 struct proc *up) 1746 { 1747 struct ps_strings pss; 1748 struct proc *p; 1749 size_t len, upper_bound, xlen; 1750 struct uio auio; 1751 struct iovec aiov; 1752 vaddr_t argv; 1753 pid_t pid; 1754 int nargv, type, error, i; 1755 char *arg; 1756 char *tmp; 1757 1758 if (namelen != 2) 1759 return (EINVAL); 1760 pid = name[0]; 1761 type = name[1]; 1762 1763 switch (type) { 1764 case KERN_PROC_ARGV: 1765 case KERN_PROC_NARGV: 1766 case KERN_PROC_ENV: 1767 case KERN_PROC_NENV: 1768 /* ok */ 1769 break; 1770 default: 1771 return (EINVAL); 1772 } 1773 1774 /* check pid */ 1775 if ((p = pfind(pid)) == NULL) 1776 return (EINVAL); 1777 1778 /* only root or same user change look at the environment */ 1779 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1780 if (up->p_ucred->cr_uid != 0) { 1781 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1782 up->p_cred->p_ruid != p->p_cred->p_svuid) 1783 return (EPERM); 1784 } 1785 } 1786 1787 if (sizep != NULL && where == NULL) { 1788 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1789 *sizep = sizeof (int); 1790 else 1791 *sizep = ARG_MAX; /* XXX XXX XXX */ 1792 return (0); 1793 } 1794 if (where == NULL || sizep == NULL) 1795 return (EINVAL); 1796 1797 /* 1798 * Zombies don't have a stack, so we can't read their psstrings. 1799 * System processes also don't have a user stack. 1800 */ 1801 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1802 return (EINVAL); 1803 1804 /* 1805 * Lock the process down in memory. 1806 */ 1807 /* XXXCDC: how should locking work here? */ 1808 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1809 return (EFAULT); 1810 1811 p->p_vmspace->vm_refcnt++; /* XXX */ 1812 1813 /* 1814 * Allocate a temporary buffer to hold the arguments. 1815 */ 1816 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1817 1818 /* 1819 * Read in the ps_strings structure. 1820 */ 1821 aiov.iov_base = &pss; 1822 aiov.iov_len = sizeof(pss); 1823 auio.uio_iov = &aiov; 1824 auio.uio_iovcnt = 1; 1825 auio.uio_offset = (vaddr_t)p->p_psstr; 1826 auio.uio_resid = sizeof(pss); 1827 auio.uio_segflg = UIO_SYSSPACE; 1828 auio.uio_rw = UIO_READ; 1829 auio.uio_procp = NULL; 1830 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1831 if (error) 1832 goto done; 1833 1834 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1835 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1836 else 1837 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1838 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1839 error = copyout(&nargv, where, sizeof(nargv)); 1840 *sizep = sizeof(nargv); 1841 goto done; 1842 } 1843 /* 1844 * Now read the address of the argument vector. 1845 */ 1846 switch (type) { 1847 case KERN_PROC_ARGV: 1848 /* XXX compat32 stuff here */ 1849 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1850 break; 1851 case KERN_PROC_ENV: 1852 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1853 break; 1854 default: 1855 return (EINVAL); 1856 } 1857 auio.uio_offset = (off_t)(long)tmp; 1858 aiov.iov_base = &argv; 1859 aiov.iov_len = sizeof(argv); 1860 auio.uio_iov = &aiov; 1861 auio.uio_iovcnt = 1; 1862 auio.uio_resid = sizeof(argv); 1863 auio.uio_segflg = UIO_SYSSPACE; 1864 auio.uio_rw = UIO_READ; 1865 auio.uio_procp = NULL; 1866 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1867 if (error) 1868 goto done; 1869 1870 /* 1871 * Now copy in the actual argument vector, one page at a time, 1872 * since we don't know how long the vector is (though, we do 1873 * know how many NUL-terminated strings are in the vector). 1874 */ 1875 len = 0; 1876 upper_bound = *sizep; 1877 for (; nargv != 0 && len < upper_bound; len += xlen) { 1878 aiov.iov_base = arg; 1879 aiov.iov_len = PAGE_SIZE; 1880 auio.uio_iov = &aiov; 1881 auio.uio_iovcnt = 1; 1882 auio.uio_offset = argv + len; 1883 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1884 auio.uio_resid = xlen; 1885 auio.uio_segflg = UIO_SYSSPACE; 1886 auio.uio_rw = UIO_READ; 1887 auio.uio_procp = NULL; 1888 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1889 if (error) 1890 goto done; 1891 1892 for (i = 0; i < xlen && nargv != 0; i++) { 1893 if (arg[i] == '\0') 1894 nargv--; /* one full string */ 1895 } 1896 1897 /* make sure we don't copyout past the end of the user's buffer */ 1898 if (len + i > upper_bound) 1899 i = upper_bound - len; 1900 1901 error = copyout(arg, (char *)where + len, i); 1902 if (error) 1903 break; 1904 1905 if (nargv == 0) { 1906 len += i; 1907 break; 1908 } 1909 } 1910 *sizep = len; 1911 1912 done: 1913 uvmspace_free(p->p_vmspace); 1914 1915 free(arg, M_TEMP); 1916 return (error); 1917 } 1918 1919 #if NPTY > 0 1920 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1921 1922 /* 1923 * Validate parameters and get old / set new parameters 1924 * for pty sysctl function. 1925 */ 1926 static int 1927 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 1928 { 1929 int error = 0; 1930 int oldmax = 0, newmax = 0; 1931 1932 /* get current value of maxptys */ 1933 oldmax = pty_maxptys(0, 0); 1934 1935 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1936 1937 if (!error && newp) { 1938 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1939 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1940 1941 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1942 return (EINVAL); 1943 1944 } 1945 1946 return (error); 1947 } 1948 #endif /* NPTY > 0 */ 1949
Indexes created Tue Sep 30 11:09:46 GMT 2025