kern_sysctl.c revision 1.86.2.8
1 /* $NetBSD: kern_sysctl.c,v 1.86.2.8 2001/09/21 22:36:25 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 79 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 80 #include <sys/ipc.h> 81 #endif 82 #ifdef SYSVMSG 83 #include <sys/msg.h> 84 #endif 85 #ifdef SYSVSEM 86 #include <sys/sem.h> 87 #endif 88 #ifdef SYSVSHM 89 #include <sys/shm.h> 90 #endif 91 92 #include <dev/cons.h> 93 94 #if defined(DDB) 95 #include <ddb/ddbvar.h> 96 #endif 97 98 #ifdef NEW_PIPE 99 #include <sys/pipe.h> 100 #endif 101 102 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 103 104 static int sysctl_file(void *, size_t *); 105 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 106 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 107 #endif 108 static int sysctl_msgbuf(void *, size_t *); 109 static int sysctl_doeproc(int *, u_int, void *, size_t *); 110 #ifdef MULTIPROCESSOR 111 static int sysctl_docptime(void *, size_t *, void *); 112 static int sysctl_ncpus(void); 113 #endif 114 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 115 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 116 #if NPTY > 0 117 static int sysctl_pty(void *, size_t *, void *, size_t); 118 #endif 119 120 static struct lwp *proc_representative_lwp(struct proc *); 121 122 /* 123 * The `sysctl_memlock' is intended to keep too many processes from 124 * locking down memory by doing sysctls at once. Whether or not this 125 * is really a good idea to worry about it probably a subject of some 126 * debate. 127 */ 128 struct lock sysctl_memlock; 129 130 void 131 sysctl_init(void) 132 { 133 134 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 135 } 136 137 int 138 sys___sysctl(struct lwp *l, void *v, register_t *retval) 139 { 140 struct sys___sysctl_args /* { 141 syscallarg(int *) name; 142 syscallarg(u_int) namelen; 143 syscallarg(void *) old; 144 syscallarg(size_t *) oldlenp; 145 syscallarg(void *) new; 146 syscallarg(size_t) newlen; 147 } */ *uap = v; 148 struct proc *p = l->l_proc; 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 } 362 return (error); 363 case KERN_MAXPROC: 364 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 365 case KERN_MAXFILES: 366 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 367 case KERN_ARGMAX: 368 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 369 case KERN_SECURELVL: 370 level = securelevel; 371 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 372 newp == NULL) 373 return (error); 374 if (level < securelevel && p->p_pid != 1) 375 return (EPERM); 376 securelevel = level; 377 return (0); 378 case KERN_HOSTNAME: 379 error = sysctl_string(oldp, oldlenp, newp, newlen, 380 hostname, sizeof(hostname)); 381 if (newp && !error) 382 hostnamelen = newlen; 383 return (error); 384 case KERN_DOMAINNAME: 385 error = sysctl_string(oldp, oldlenp, newp, newlen, 386 domainname, sizeof(domainname)); 387 if (newp && !error) 388 domainnamelen = newlen; 389 return (error); 390 case KERN_HOSTID: 391 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 392 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 393 hostid = inthostid; 394 return (error); 395 case KERN_CLOCKRATE: 396 return (sysctl_clockrate(oldp, oldlenp)); 397 case KERN_BOOTTIME: 398 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 399 sizeof(struct timeval))); 400 case KERN_VNODE: 401 return (sysctl_vnode(oldp, oldlenp, p)); 402 case KERN_PROC: 403 case KERN_PROC2: 404 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 405 case KERN_PROC_ARGS: 406 return (sysctl_procargs(name + 1, namelen - 1, 407 oldp, oldlenp, p)); 408 case KERN_FILE: 409 return (sysctl_file(oldp, oldlenp)); 410 #ifdef GPROF 411 case KERN_PROF: 412 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 413 newp, newlen)); 414 #endif 415 case KERN_POSIX1: 416 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 417 case KERN_NGROUPS: 418 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 419 case KERN_JOB_CONTROL: 420 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 421 case KERN_SAVED_IDS: 422 #ifdef _POSIX_SAVED_IDS 423 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 424 #else 425 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 426 #endif 427 case KERN_MAXPARTITIONS: 428 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 429 case KERN_RAWPARTITION: 430 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 431 #ifdef NTP 432 case KERN_NTPTIME: 433 return (sysctl_ntptime(oldp, oldlenp)); 434 #endif 435 case KERN_AUTONICETIME: 436 old_autonicetime = autonicetime; 437 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 438 if (autonicetime < 0) 439 autonicetime = old_autonicetime; 440 return (error); 441 case KERN_AUTONICEVAL: 442 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 443 if (autoniceval < PRIO_MIN) 444 autoniceval = PRIO_MIN; 445 if (autoniceval > PRIO_MAX) 446 autoniceval = PRIO_MAX; 447 return (error); 448 case KERN_RTC_OFFSET: 449 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 450 case KERN_ROOT_DEVICE: 451 return (sysctl_rdstring(oldp, oldlenp, newp, 452 root_device->dv_xname)); 453 case KERN_MSGBUFSIZE: 454 /* 455 * deal with cases where the message buffer has 456 * become corrupted. 457 */ 458 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 459 msgbufenabled = 0; 460 return (ENXIO); 461 } 462 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 463 case KERN_FSYNC: 464 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 465 case KERN_SYSVMSG: 466 #ifdef SYSVMSG 467 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 468 #else 469 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 470 #endif 471 case KERN_SYSVSEM: 472 #ifdef SYSVSEM 473 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 474 #else 475 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 476 #endif 477 case KERN_SYSVSHM: 478 #ifdef SYSVSHM 479 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 480 #else 481 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 482 #endif 483 case KERN_DEFCORENAME: 484 if (newp && newlen < 1) 485 return (EINVAL); 486 error = sysctl_string(oldp, oldlenp, newp, newlen, 487 defcorename, sizeof(defcorename)); 488 if (newp && !error) 489 defcorenamelen = newlen; 490 return (error); 491 case KERN_SYNCHRONIZED_IO: 492 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 493 case KERN_IOV_MAX: 494 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 495 case KERN_MBUF: 496 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 497 newp, newlen)); 498 case KERN_MAPPED_FILES: 499 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 500 case KERN_MEMLOCK: 501 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 502 case KERN_MEMLOCK_RANGE: 503 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 504 case KERN_MEMORY_PROTECTION: 505 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 506 case KERN_LOGIN_NAME_MAX: 507 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 508 case KERN_LOGSIGEXIT: 509 return (sysctl_int(oldp, oldlenp, newp, newlen, 510 &kern_logsigexit)); 511 case KERN_FSCALE: 512 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 513 case KERN_CCPU: 514 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 515 case KERN_CP_TIME: 516 #ifndef MULTIPROCESSOR 517 return (sysctl_rdstruct(oldp, oldlenp, newp, 518 curcpu()->ci_schedstate.spc_cp_time, 519 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 520 #else 521 return (sysctl_docptime(oldp, oldlenp, newp)); 522 #endif 523 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 524 case KERN_SYSVIPC_INFO: 525 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 526 #endif 527 case KERN_MSGBUF: 528 return (sysctl_msgbuf(oldp, oldlenp)); 529 case KERN_CONSDEV: 530 if (cn_tab != NULL) 531 consdev = cn_tab->cn_dev; 532 else 533 consdev = NODEV; 534 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 535 sizeof consdev)); 536 #if NPTY > 0 537 case KERN_MAXPTYS: 538 return sysctl_pty(oldp, oldlenp, newp, newlen); 539 #endif 540 #ifdef NEW_PIPE 541 case KERN_PIPE: 542 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 543 newp, newlen)); 544 #endif 545 case KERN_MAXPHYS: 546 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 547 case KERN_SBMAX: 548 { 549 int new_sbmax = sb_max; 550 551 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 552 if (error == 0) { 553 if (new_sbmax < (16 * 1024)) /* sanity */ 554 return (EINVAL); 555 sb_max = new_sbmax; 556 } 557 return (error); 558 } 559 default: 560 return (EOPNOTSUPP); 561 } 562 /* NOTREACHED */ 563 } 564 565 /* 566 * hardware related system variables. 567 */ 568 int 569 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 570 void *newp, size_t newlen, struct proc *p) 571 { 572 573 /* all sysctl names at this level are terminal */ 574 if (namelen != 1) 575 return (ENOTDIR); /* overloaded */ 576 577 switch (name[0]) { 578 case HW_MACHINE: 579 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 580 case HW_MACHINE_ARCH: 581 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 582 case HW_MODEL: 583 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 584 case HW_NCPU: 585 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 586 case HW_BYTEORDER: 587 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 588 case HW_PHYSMEM: 589 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 590 case HW_USERMEM: 591 return (sysctl_rdint(oldp, oldlenp, newp, 592 ctob(physmem - uvmexp.wired))); 593 case HW_PAGESIZE: 594 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 595 case HW_ALIGNBYTES: 596 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 597 case HW_CNMAGIC: { 598 char magic[CNS_LEN]; 599 int error; 600 601 if (oldp) 602 cn_get_magic(magic, CNS_LEN); 603 error = sysctl_string(oldp, oldlenp, newp, newlen, 604 magic, sizeof(magic)); 605 if (newp && !error) { 606 error = cn_set_magic(magic); 607 } 608 return (error); 609 } 610 default: 611 return (EOPNOTSUPP); 612 } 613 /* NOTREACHED */ 614 } 615 616 #ifdef DEBUG 617 /* 618 * Debugging related system variables. 619 */ 620 struct ctldebug debug0, debug1, debug2, debug3, debug4; 621 struct ctldebug debug5, debug6, debug7, debug8, debug9; 622 struct ctldebug debug10, debug11, debug12, debug13, debug14; 623 struct ctldebug debug15, debug16, debug17, debug18, debug19; 624 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 625 &debug0, &debug1, &debug2, &debug3, &debug4, 626 &debug5, &debug6, &debug7, &debug8, &debug9, 627 &debug10, &debug11, &debug12, &debug13, &debug14, 628 &debug15, &debug16, &debug17, &debug18, &debug19, 629 }; 630 631 int 632 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 633 void *newp, size_t newlen, struct proc *p) 634 { 635 struct ctldebug *cdp; 636 637 /* all sysctl names at this level are name and field */ 638 if (namelen != 2) 639 return (ENOTDIR); /* overloaded */ 640 cdp = debugvars[name[0]]; 641 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 642 return (EOPNOTSUPP); 643 switch (name[1]) { 644 case CTL_DEBUG_NAME: 645 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 646 case CTL_DEBUG_VALUE: 647 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 648 default: 649 return (EOPNOTSUPP); 650 } 651 /* NOTREACHED */ 652 } 653 #endif /* DEBUG */ 654 655 int 656 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 657 void *newp, size_t newlen, struct proc *p) 658 { 659 struct proc *ptmp = NULL; 660 const struct proclist_desc *pd; 661 int error = 0; 662 struct rlimit alim; 663 struct plimit *newplim; 664 char *tmps = NULL; 665 int i, curlen, len; 666 667 if (namelen < 2) 668 return EINVAL; 669 670 if (name[0] == PROC_CURPROC) { 671 ptmp = p; 672 } else { 673 proclist_lock_read(); 674 for (pd = proclists; pd->pd_list != NULL; pd++) { 675 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 676 ptmp = LIST_NEXT(ptmp, p_list)) { 677 /* Skip embryonic processes. */ 678 if (ptmp->p_stat == SIDL) 679 continue; 680 if (ptmp->p_pid == (pid_t)name[0]) 681 break; 682 } 683 if (ptmp != NULL) 684 break; 685 } 686 proclist_unlock_read(); 687 if (ptmp == NULL) 688 return(ESRCH); 689 if (p->p_ucred->cr_uid != 0) { 690 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 691 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 692 return EPERM; 693 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 694 return EPERM; /* sgid proc */ 695 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 696 if (p->p_ucred->cr_groups[i] == 697 ptmp->p_cred->p_rgid) 698 break; 699 } 700 if (i == p->p_ucred->cr_ngroups) 701 return EPERM; 702 } 703 } 704 if (name[1] == PROC_PID_CORENAME) { 705 if (namelen != 2) 706 return EINVAL; 707 /* 708 * Can't use sysctl_string() here because we may malloc a new 709 * area during the process, so we have to do it by hand. 710 */ 711 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 712 if (oldlenp && *oldlenp < curlen) { 713 if (!oldp) 714 *oldlenp = curlen; 715 return (ENOMEM); 716 } 717 if (newp) { 718 if (securelevel > 2) 719 return EPERM; 720 if (newlen > MAXPATHLEN) 721 return ENAMETOOLONG; 722 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 723 if (tmps == NULL) 724 return ENOMEM; 725 error = copyin(newp, tmps, newlen + 1); 726 tmps[newlen] = '\0'; 727 if (error) 728 goto cleanup; 729 /* Enforce to be either 'core' for end with '.core' */ 730 if (newlen < 4) { /* c.o.r.e */ 731 error = EINVAL; 732 goto cleanup; 733 } 734 len = newlen - 4; 735 if (len > 0) { 736 if (tmps[len - 1] != '.' && 737 tmps[len - 1] != '/') { 738 error = EINVAL; 739 goto cleanup; 740 } 741 } 742 if (strcmp(&tmps[len], "core") != 0) { 743 error = EINVAL; 744 goto cleanup; 745 } 746 } 747 if (oldp && oldlenp) { 748 *oldlenp = curlen; 749 error = copyout(ptmp->p_limit->pl_corename, oldp, 750 curlen); 751 } 752 if (newp && error == 0) { 753 /* if the 2 strings are identical, don't limcopy() */ 754 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 755 error = 0; 756 goto cleanup; 757 } 758 if (ptmp->p_limit->p_refcnt > 1 && 759 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 760 newplim = limcopy(ptmp->p_limit); 761 limfree(ptmp->p_limit); 762 ptmp->p_limit = newplim; 763 } else if (ptmp->p_limit->pl_corename != defcorename) { 764 free(ptmp->p_limit->pl_corename, M_TEMP); 765 } 766 ptmp->p_limit->pl_corename = tmps; 767 return (0); 768 } 769 cleanup: 770 if (tmps) 771 free(tmps, M_TEMP); 772 return (error); 773 } 774 if (name[1] == PROC_PID_LIMIT) { 775 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 776 return EINVAL; 777 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 778 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 779 error = sysctl_quad(oldp, oldlenp, newp, newlen, 780 &alim.rlim_max); 781 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 782 error = sysctl_quad(oldp, oldlenp, newp, newlen, 783 &alim.rlim_cur); 784 else 785 error = EINVAL; 786 787 if (error) 788 return error; 789 790 if (newp) 791 error = dosetrlimit(ptmp, p->p_cred, 792 name[2] - 1, &alim); 793 return error; 794 } 795 return (EINVAL); 796 } 797 798 /* 799 * Convenience macros. 800 */ 801 802 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 803 if (oldlenp) { \ 804 if (!oldp) \ 805 *oldlenp = len; \ 806 else { \ 807 if (*oldlenp < len) \ 808 return(ENOMEM); \ 809 *oldlenp = len; \ 810 error = copyout((caddr_t)valp, oldp, len); \ 811 } \ 812 } 813 814 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 815 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 816 817 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 818 if (newp && newlen != len) \ 819 return (EINVAL); 820 821 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 822 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 823 824 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 825 if (error == 0 && newp) \ 826 error = copyin(newp, valp, len); 827 828 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 829 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 830 831 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 832 if (oldlenp) { \ 833 len = strlen(str) + 1; \ 834 if (!oldp) \ 835 *oldlenp = len; \ 836 else { \ 837 if (*oldlenp < len) { \ 838 err2 = ENOMEM; \ 839 len = *oldlenp; \ 840 } else \ 841 *oldlenp = len; \ 842 error = copyout(str, oldp, len);\ 843 if (error == 0) \ 844 error = err2; \ 845 } \ 846 } 847 848 /* 849 * Validate parameters and get old / set new parameters 850 * for an integer-valued sysctl function. 851 */ 852 int 853 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 854 { 855 int error = 0; 856 857 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 858 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 859 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 860 861 return (error); 862 } 863 864 865 /* 866 * As above, but read-only. 867 */ 868 int 869 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 870 { 871 int error = 0; 872 873 if (newp) 874 return (EPERM); 875 876 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 877 878 return (error); 879 } 880 881 /* 882 * Validate parameters and get old / set new parameters 883 * for an quad-valued sysctl function. 884 */ 885 int 886 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 887 quad_t *valp) 888 { 889 int error = 0; 890 891 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 892 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 893 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 894 895 return (error); 896 } 897 898 /* 899 * As above, but read-only. 900 */ 901 int 902 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 903 { 904 int error = 0; 905 906 if (newp) 907 return (EPERM); 908 909 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 910 911 return (error); 912 } 913 914 /* 915 * Validate parameters and get old / set new parameters 916 * for a string-valued sysctl function. 917 */ 918 int 919 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 920 int maxlen) 921 { 922 int len, error = 0, err2 = 0; 923 924 if (newp && newlen >= maxlen) 925 return (EINVAL); 926 927 SYSCTL_STRING_CORE(oldp, oldlenp, str); 928 929 if (error == 0 && newp) { 930 error = copyin(newp, str, newlen); 931 str[newlen] = 0; 932 } 933 return (error); 934 } 935 936 /* 937 * As above, but read-only. 938 */ 939 int 940 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 941 { 942 int len, error = 0, err2 = 0; 943 944 if (newp) 945 return (EPERM); 946 947 SYSCTL_STRING_CORE(oldp, oldlenp, str); 948 949 return (error); 950 } 951 952 /* 953 * Validate parameters and get old / set new parameters 954 * for a structure oriented sysctl function. 955 */ 956 int 957 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 958 int len) 959 { 960 int error = 0; 961 962 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 963 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 964 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 965 966 return (error); 967 } 968 969 /* 970 * Validate parameters and get old parameters 971 * for a structure oriented sysctl function. 972 */ 973 int 974 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 975 int len) 976 { 977 int error = 0; 978 979 if (newp) 980 return (EPERM); 981 982 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 983 984 return (error); 985 } 986 987 /* 988 * As above, but can return a truncated result. 989 */ 990 int 991 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 992 int len) 993 { 994 int error = 0; 995 996 if (newp) 997 return (EPERM); 998 999 len = min(*oldlenp, len); 1000 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1001 1002 return (error); 1003 } 1004 1005 /* 1006 * Get file structures. 1007 */ 1008 static int 1009 sysctl_file(void *vwhere, size_t *sizep) 1010 { 1011 int buflen, error; 1012 struct file *fp; 1013 char *start, *where; 1014 1015 start = where = vwhere; 1016 buflen = *sizep; 1017 if (where == NULL) { 1018 /* 1019 * overestimate by 10 files 1020 */ 1021 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1022 return (0); 1023 } 1024 1025 /* 1026 * first copyout filehead 1027 */ 1028 if (buflen < sizeof(filehead)) { 1029 *sizep = 0; 1030 return (0); 1031 } 1032 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1033 if (error) 1034 return (error); 1035 buflen -= sizeof(filehead); 1036 where += sizeof(filehead); 1037 1038 /* 1039 * followed by an array of file structures 1040 */ 1041 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1042 if (buflen < sizeof(struct file)) { 1043 *sizep = where - start; 1044 return (ENOMEM); 1045 } 1046 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1047 if (error) 1048 return (error); 1049 buflen -= sizeof(struct file); 1050 where += sizeof(struct file); 1051 } 1052 *sizep = where - start; 1053 return (0); 1054 } 1055 1056 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1057 #define FILL_PERM(src, dst) do { \ 1058 (dst)._key = (src)._key; \ 1059 (dst).uid = (src).uid; \ 1060 (dst).gid = (src).gid; \ 1061 (dst).cuid = (src).cuid; \ 1062 (dst).cgid = (src).cgid; \ 1063 (dst).mode = (src).mode; \ 1064 (dst)._seq = (src)._seq; \ 1065 } while (0); 1066 #define FILL_MSG(src, dst) do { \ 1067 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1068 (dst).msg_qnum = (src).msg_qnum; \ 1069 (dst).msg_qbytes = (src).msg_qbytes; \ 1070 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1071 (dst).msg_lspid = (src).msg_lspid; \ 1072 (dst).msg_lrpid = (src).msg_lrpid; \ 1073 (dst).msg_stime = (src).msg_stime; \ 1074 (dst).msg_rtime = (src).msg_rtime; \ 1075 (dst).msg_ctime = (src).msg_ctime; \ 1076 } while (0) 1077 #define FILL_SEM(src, dst) do { \ 1078 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1079 (dst).sem_nsems = (src).sem_nsems; \ 1080 (dst).sem_otime = (src).sem_otime; \ 1081 (dst).sem_ctime = (src).sem_ctime; \ 1082 } while (0) 1083 #define FILL_SHM(src, dst) do { \ 1084 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1085 (dst).shm_segsz = (src).shm_segsz; \ 1086 (dst).shm_lpid = (src).shm_lpid; \ 1087 (dst).shm_cpid = (src).shm_cpid; \ 1088 (dst).shm_atime = (src).shm_atime; \ 1089 (dst).shm_dtime = (src).shm_dtime; \ 1090 (dst).shm_ctime = (src).shm_ctime; \ 1091 (dst).shm_nattch = (src).shm_nattch; \ 1092 } while (0) 1093 1094 static int 1095 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1096 { 1097 #ifdef SYSVMSG 1098 struct msg_sysctl_info *msgsi; 1099 #endif 1100 #ifdef SYSVSEM 1101 struct sem_sysctl_info *semsi; 1102 #endif 1103 #ifdef SYSVSHM 1104 struct shm_sysctl_info *shmsi; 1105 #endif 1106 size_t infosize, dssize, tsize, buflen; 1107 void *buf = NULL, *buf2; 1108 char *start; 1109 int32_t nds; 1110 int i, error, ret; 1111 1112 if (namelen != 1) 1113 return (EINVAL); 1114 1115 start = where; 1116 buflen = *sizep; 1117 1118 switch (*name) { 1119 case KERN_SYSVIPC_MSG_INFO: 1120 #ifdef SYSVMSG 1121 infosize = sizeof(msgsi->msginfo); 1122 nds = msginfo.msgmni; 1123 dssize = sizeof(msgsi->msgids[0]); 1124 break; 1125 #else 1126 return (EINVAL); 1127 #endif 1128 case KERN_SYSVIPC_SEM_INFO: 1129 #ifdef SYSVSEM 1130 infosize = sizeof(semsi->seminfo); 1131 nds = seminfo.semmni; 1132 dssize = sizeof(semsi->semids[0]); 1133 break; 1134 #else 1135 return (EINVAL); 1136 #endif 1137 case KERN_SYSVIPC_SHM_INFO: 1138 #ifdef SYSVSHM 1139 infosize = sizeof(shmsi->shminfo); 1140 nds = shminfo.shmmni; 1141 dssize = sizeof(shmsi->shmids[0]); 1142 break; 1143 #else 1144 return (EINVAL); 1145 #endif 1146 default: 1147 return (EINVAL); 1148 } 1149 /* 1150 * Round infosize to 64 bit boundary if requesting more than just 1151 * the info structure or getting the total data size. 1152 */ 1153 if (where == NULL || *sizep > infosize) 1154 infosize = ((infosize + 7) / 8) * 8; 1155 tsize = infosize + nds * dssize; 1156 1157 /* Return just the total size required. */ 1158 if (where == NULL) { 1159 *sizep = tsize; 1160 return (0); 1161 } 1162 1163 /* Not enough room for even the info struct. */ 1164 if (buflen < infosize) { 1165 *sizep = 0; 1166 return (ENOMEM); 1167 } 1168 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1169 memset(buf, 0, min(tsize, buflen)); 1170 1171 switch (*name) { 1172 #ifdef SYSVMSG 1173 case KERN_SYSVIPC_MSG_INFO: 1174 msgsi = (struct msg_sysctl_info *)buf; 1175 buf2 = &msgsi->msgids[0]; 1176 msgsi->msginfo = msginfo; 1177 break; 1178 #endif 1179 #ifdef SYSVSEM 1180 case KERN_SYSVIPC_SEM_INFO: 1181 semsi = (struct sem_sysctl_info *)buf; 1182 buf2 = &semsi->semids[0]; 1183 semsi->seminfo = seminfo; 1184 break; 1185 #endif 1186 #ifdef SYSVSHM 1187 case KERN_SYSVIPC_SHM_INFO: 1188 shmsi = (struct shm_sysctl_info *)buf; 1189 buf2 = &shmsi->shmids[0]; 1190 shmsi->shminfo = shminfo; 1191 break; 1192 #endif 1193 } 1194 buflen -= infosize; 1195 1196 ret = 0; 1197 if (buflen > 0) { 1198 /* Fill in the IPC data structures. */ 1199 for (i = 0; i < nds; i++) { 1200 if (buflen < dssize) { 1201 ret = ENOMEM; 1202 break; 1203 } 1204 switch (*name) { 1205 #ifdef SYSVMSG 1206 case KERN_SYSVIPC_MSG_INFO: 1207 FILL_MSG(msqids[i], msgsi->msgids[i]); 1208 break; 1209 #endif 1210 #ifdef SYSVSEM 1211 case KERN_SYSVIPC_SEM_INFO: 1212 FILL_SEM(sema[i], semsi->semids[i]); 1213 break; 1214 #endif 1215 #ifdef SYSVSHM 1216 case KERN_SYSVIPC_SHM_INFO: 1217 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1218 break; 1219 #endif 1220 } 1221 buflen -= dssize; 1222 } 1223 } 1224 *sizep -= buflen; 1225 error = copyout(buf, start, *sizep); 1226 /* If copyout succeeded, use return code set earlier. */ 1227 if (error == 0) 1228 error = ret; 1229 if (buf) 1230 free(buf, M_TEMP); 1231 return (error); 1232 } 1233 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1234 1235 static int 1236 sysctl_msgbuf(void *vwhere, size_t *sizep) 1237 { 1238 char *where = vwhere; 1239 size_t len, maxlen = *sizep; 1240 long beg, end; 1241 int error; 1242 1243 /* 1244 * deal with cases where the message buffer has 1245 * become corrupted. 1246 */ 1247 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1248 msgbufenabled = 0; 1249 return (ENXIO); 1250 } 1251 1252 if (where == NULL) { 1253 /* always return full buffer size */ 1254 *sizep = msgbufp->msg_bufs; 1255 return (0); 1256 } 1257 1258 error = 0; 1259 maxlen = min(msgbufp->msg_bufs, maxlen); 1260 1261 /* 1262 * First, copy from the write pointer to the end of 1263 * message buffer. 1264 */ 1265 beg = msgbufp->msg_bufx; 1266 end = msgbufp->msg_bufs; 1267 while (maxlen > 0) { 1268 len = min(end - beg, maxlen); 1269 if (len == 0) 1270 break; 1271 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1272 if (error) 1273 break; 1274 where += len; 1275 maxlen -= len; 1276 1277 /* 1278 * ... then, copy from the beginning of message buffer to 1279 * the write pointer. 1280 */ 1281 beg = 0; 1282 end = msgbufp->msg_bufx; 1283 } 1284 return (error); 1285 } 1286 1287 /* 1288 * try over estimating by 5 procs 1289 */ 1290 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1291 1292 static int 1293 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1294 { 1295 struct eproc eproc; 1296 struct kinfo_proc2 kproc2; 1297 struct kinfo_proc *dp; 1298 struct proc *p; 1299 const struct proclist_desc *pd; 1300 char *where, *dp2; 1301 int type, op, arg, elem_size, elem_count; 1302 int buflen, needed, error; 1303 1304 dp = vwhere; 1305 dp2 = where = vwhere; 1306 buflen = where != NULL ? *sizep : 0; 1307 error = needed = 0; 1308 type = name[0]; 1309 1310 if (type == KERN_PROC) { 1311 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1312 return (EINVAL); 1313 op = name[1]; 1314 if (op != KERN_PROC_ALL) 1315 arg = name[2]; 1316 } else { 1317 if (namelen != 5) 1318 return (EINVAL); 1319 op = name[1]; 1320 arg = name[2]; 1321 elem_size = name[3]; 1322 elem_count = name[4]; 1323 } 1324 1325 proclist_lock_read(); 1326 1327 pd = proclists; 1328 again: 1329 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1330 /* 1331 * Skip embryonic processes. 1332 */ 1333 if (p->p_stat == SIDL) 1334 continue; 1335 /* 1336 * TODO - make more efficient (see notes below). 1337 * do by session. 1338 */ 1339 switch (op) { 1340 1341 case KERN_PROC_PID: 1342 /* could do this with just a lookup */ 1343 if (p->p_pid != (pid_t)arg) 1344 continue; 1345 break; 1346 1347 case KERN_PROC_PGRP: 1348 /* could do this by traversing pgrp */ 1349 if (p->p_pgrp->pg_id != (pid_t)arg) 1350 continue; 1351 break; 1352 1353 case KERN_PROC_SESSION: 1354 if (p->p_session->s_sid != (pid_t)arg) 1355 continue; 1356 break; 1357 1358 case KERN_PROC_TTY: 1359 if (arg == KERN_PROC_TTY_REVOKE) { 1360 if ((p->p_flag & P_CONTROLT) == 0 || 1361 p->p_session->s_ttyp == NULL || 1362 p->p_session->s_ttyvp != NULL) 1363 continue; 1364 } else if ((p->p_flag & P_CONTROLT) == 0 || 1365 p->p_session->s_ttyp == NULL) { 1366 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1367 continue; 1368 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1369 continue; 1370 break; 1371 1372 case KERN_PROC_UID: 1373 if (p->p_ucred->cr_uid != (uid_t)arg) 1374 continue; 1375 break; 1376 1377 case KERN_PROC_RUID: 1378 if (p->p_cred->p_ruid != (uid_t)arg) 1379 continue; 1380 break; 1381 1382 case KERN_PROC_GID: 1383 if (p->p_ucred->cr_gid != (uid_t)arg) 1384 continue; 1385 break; 1386 1387 case KERN_PROC_RGID: 1388 if (p->p_cred->p_rgid != (uid_t)arg) 1389 continue; 1390 break; 1391 1392 case KERN_PROC_ALL: 1393 /* allow everything */ 1394 break; 1395 1396 default: 1397 error = EINVAL; 1398 goto cleanup; 1399 } 1400 if (type == KERN_PROC) { 1401 if (buflen >= sizeof(struct kinfo_proc)) { 1402 fill_eproc(p, &eproc); 1403 error = copyout((caddr_t)p, &dp->kp_proc, 1404 sizeof(struct proc)); 1405 if (error) 1406 goto cleanup; 1407 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1408 sizeof(eproc)); 1409 if (error) 1410 goto cleanup; 1411 dp++; 1412 buflen -= sizeof(struct kinfo_proc); 1413 } 1414 needed += sizeof(struct kinfo_proc); 1415 } else { /* KERN_PROC2 */ 1416 if (buflen >= elem_size && elem_count > 0) { 1417 fill_kproc2(p, &kproc2); 1418 /* 1419 * Copy out elem_size, but not larger than 1420 * the size of a struct kinfo_proc2. 1421 */ 1422 error = copyout(&kproc2, dp2, 1423 min(sizeof(kproc2), elem_size)); 1424 if (error) 1425 goto cleanup; 1426 dp2 += elem_size; 1427 buflen -= elem_size; 1428 elem_count--; 1429 } 1430 needed += elem_size; 1431 } 1432 } 1433 pd++; 1434 if (pd->pd_list != NULL) 1435 goto again; 1436 proclist_unlock_read(); 1437 1438 if (where != NULL) { 1439 if (type == KERN_PROC) 1440 *sizep = (caddr_t)dp - where; 1441 else 1442 *sizep = dp2 - where; 1443 if (needed > *sizep) 1444 return (ENOMEM); 1445 } else { 1446 needed += KERN_PROCSLOP; 1447 *sizep = needed; 1448 } 1449 return (0); 1450 cleanup: 1451 proclist_unlock_read(); 1452 return (error); 1453 } 1454 1455 /* 1456 * Fill in an eproc structure for the specified process. 1457 */ 1458 void 1459 fill_eproc(struct proc *p, struct eproc *ep) 1460 { 1461 struct tty *tp; 1462 struct lwp *l; 1463 1464 ep->e_paddr = p; 1465 ep->e_sess = p->p_session; 1466 ep->e_pcred = *p->p_cred; 1467 ep->e_ucred = *p->p_ucred; 1468 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1469 ep->e_vm.vm_rssize = 0; 1470 ep->e_vm.vm_tsize = 0; 1471 ep->e_vm.vm_dsize = 0; 1472 ep->e_vm.vm_ssize = 0; 1473 /* ep->e_vm.vm_pmap = XXX; */ 1474 } else { 1475 struct vmspace *vm = p->p_vmspace; 1476 1477 ep->e_vm.vm_rssize = vm_resident_count(vm); 1478 ep->e_vm.vm_tsize = vm->vm_tsize; 1479 ep->e_vm.vm_dsize = vm->vm_dsize; 1480 ep->e_vm.vm_ssize = vm->vm_ssize; 1481 1482 /* Pick a "representative" LWP */ 1483 l = proc_representative_lwp(p); 1484 1485 if (l->l_wmesg) 1486 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1487 } 1488 if (p->p_pptr) 1489 ep->e_ppid = p->p_pptr->p_pid; 1490 else 1491 ep->e_ppid = 0; 1492 ep->e_pgid = p->p_pgrp->pg_id; 1493 ep->e_sid = ep->e_sess->s_sid; 1494 ep->e_jobc = p->p_pgrp->pg_jobc; 1495 if ((p->p_flag & P_CONTROLT) && 1496 (tp = ep->e_sess->s_ttyp)) { 1497 ep->e_tdev = tp->t_dev; 1498 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1499 ep->e_tsess = tp->t_session; 1500 } else 1501 ep->e_tdev = NODEV; 1502 1503 ep->e_xsize = ep->e_xrssize = 0; 1504 ep->e_xccount = ep->e_xswrss = 0; 1505 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1506 if (SESS_LEADER(p)) 1507 ep->e_flag |= EPROC_SLEADER; 1508 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1509 } 1510 1511 /* 1512 * Fill in an eproc structure for the specified process. 1513 */ 1514 static void 1515 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1516 { 1517 struct tty *tp; 1518 struct lwp *l; 1519 memset(ki, 0, sizeof(*ki)); 1520 1521 /* XXX NJWLWP 1522 * These are likely not what the caller was looking for. 1523 * The perils of playing with the kernel data structures... 1524 */ 1525 ki->p_paddr = PTRTOINT64(p); 1526 ki->p_fd = PTRTOINT64(p->p_fd); 1527 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1528 ki->p_stats = PTRTOINT64(p->p_stats); 1529 ki->p_limit = PTRTOINT64(p->p_limit); 1530 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1531 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1532 ki->p_sess = PTRTOINT64(p->p_session); 1533 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1534 ki->p_ru = PTRTOINT64(p->p_ru); 1535 1536 ki->p_eflag = 0; 1537 ki->p_exitsig = p->p_exitsig; 1538 ki->p_flag = p->p_flag; 1539 1540 ki->p_pid = p->p_pid; 1541 if (p->p_pptr) 1542 ki->p_ppid = p->p_pptr->p_pid; 1543 else 1544 ki->p_ppid = 0; 1545 ki->p_sid = p->p_session->s_sid; 1546 ki->p__pgid = p->p_pgrp->pg_id; 1547 1548 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1549 1550 ki->p_uid = p->p_ucred->cr_uid; 1551 ki->p_ruid = p->p_cred->p_ruid; 1552 ki->p_gid = p->p_ucred->cr_gid; 1553 ki->p_rgid = p->p_cred->p_rgid; 1554 1555 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1556 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1557 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1558 1559 ki->p_jobc = p->p_pgrp->pg_jobc; 1560 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1561 ki->p_tdev = tp->t_dev; 1562 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1563 ki->p_tsess = PTRTOINT64(tp->t_session); 1564 } else { 1565 ki->p_tdev = NODEV; 1566 } 1567 1568 ki->p_estcpu = p->p_estcpu; 1569 ki->p_rtime_sec = p->p_rtime.tv_sec; 1570 ki->p_rtime_usec = p->p_rtime.tv_usec; 1571 ki->p_cpticks = p->p_cpticks; 1572 ki->p_pctcpu = p->p_pctcpu; 1573 1574 ki->p_uticks = p->p_uticks; 1575 ki->p_sticks = p->p_sticks; 1576 ki->p_iticks = p->p_iticks; 1577 1578 ki->p_tracep = PTRTOINT64(p->p_tracep); 1579 ki->p_traceflag = p->p_traceflag; 1580 1581 1582 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1583 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1584 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1585 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1586 1587 ki->p_stat = p->p_stat; 1588 ki->p_nice = p->p_nice; 1589 1590 ki->p_xstat = p->p_xstat; 1591 ki->p_acflag = p->p_acflag; 1592 1593 strncpy(ki->p_comm, p->p_comm, 1594 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1595 1596 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1597 1598 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1599 ki->p_vm_rssize = 0; 1600 ki->p_vm_tsize = 0; 1601 ki->p_vm_dsize = 0; 1602 ki->p_vm_ssize = 0; 1603 } else { 1604 struct vmspace *vm = p->p_vmspace; 1605 1606 ki->p_vm_rssize = vm_resident_count(vm); 1607 ki->p_vm_tsize = vm->vm_tsize; 1608 ki->p_vm_dsize = vm->vm_dsize; 1609 ki->p_vm_ssize = vm->vm_ssize; 1610 1611 /* Pick a "representative" LWP */ 1612 l = proc_representative_lwp(p); 1613 ki->p_forw = PTRTOINT64(l->l_forw); 1614 ki->p_back = PTRTOINT64(l->l_back); 1615 ki->p_addr = PTRTOINT64(l->l_addr); 1616 ki->p_stat = l->l_stat; 1617 ki->p_flag |= l->l_flag; 1618 ki->p_swtime = l->l_swtime; 1619 ki->p_slptime = l->l_slptime; 1620 if (l->l_stat == LSONPROC) { 1621 KDASSERT(l->l_cpu != NULL); 1622 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1623 } else 1624 ki->p_schedflags = 0; 1625 ki->p_holdcnt = l->l_holdcnt; 1626 ki->p_priority = l->l_priority; 1627 ki->p_usrpri = l->l_usrpri; 1628 if (l->l_wmesg) 1629 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1630 ki->p_wchan = PTRTOINT64(l->l_wchan); 1631 1632 } 1633 1634 if (p->p_session->s_ttyvp) 1635 ki->p_eflag |= EPROC_CTTY; 1636 if (SESS_LEADER(p)) 1637 ki->p_eflag |= EPROC_SLEADER; 1638 1639 /* XXX Is this double check necessary? */ 1640 if (P_ZOMBIE(p)) { 1641 ki->p_uvalid = 0; 1642 } else { 1643 ki->p_uvalid = 1; 1644 1645 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1646 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1647 1648 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1649 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1650 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1651 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1652 1653 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1654 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1655 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1656 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1657 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1658 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1659 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1660 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1661 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1662 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1663 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1664 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1665 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1666 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1667 1668 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1669 p->p_stats->p_cru.ru_stime.tv_sec; 1670 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1671 p->p_stats->p_cru.ru_stime.tv_usec; 1672 } 1673 #ifdef MULTIPROCESSOR 1674 if (p->p_cpu != NULL) 1675 ki->p_cpuid = p->p_cpu->ci_cpuid; 1676 else 1677 #endif 1678 ki->p_cpuid = KI_NOCPU; 1679 1680 } 1681 1682 1683 /* 1684 * Pick a LWP to represent the process for those operations which 1685 * want information about a "process" that is actually associated 1686 * with a LWP. 1687 */ 1688 static struct lwp *proc_representative_lwp(p) 1689 struct proc *p; 1690 { 1691 struct lwp *l = NULL; 1692 1693 /* Trivial case: only one LWP */ 1694 if (p->p_nrlwps == 1) 1695 return (LIST_FIRST(&p->p_lwps)); 1696 1697 switch (p->p_stat) { 1698 case SSTOP: 1699 /* Pick the first stopped LWP */ 1700 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1701 if (l->l_stat == LSSTOP) 1702 return (l); 1703 } 1704 /* NOTREACHED */ 1705 break; 1706 case SACTIVE: 1707 /* Pick the first live LWP */ 1708 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1709 if (l->l_stat == LSRUN || 1710 l->l_stat == LSSLEEP || 1711 l->l_stat == LSONPROC || 1712 l->l_stat == LSSUSPENDED) 1713 return (l); 1714 } 1715 break; 1716 case SDEAD: 1717 case SZOMB: 1718 /* Doesn't really matter... */ 1719 l = LIST_FIRST(&p->p_lwps); 1720 break; 1721 #ifdef DIAGNOSTIC 1722 case SIDL: 1723 /* We have more than one LWP and we're in SIDL? 1724 * How'd that happen? 1725 */ 1726 panic("Too many LWPs (%d) in SIDL process %d (%s)", 1727 p->p_nrlwps, p->p_pid, p->p_comm); 1728 default: 1729 panic("Process %d (%s) in unknown state %d", 1730 p->p_pid, p->p_comm, p->p_stat); 1731 #endif 1732 } 1733 1734 panic("proc_representative_lwp: couldn't find a lwp for process" 1735 " %d (%s)", p->p_pid, p->p_comm); 1736 /* NOTREACHED */ 1737 return NULL; 1738 } 1739 1740 1741 int 1742 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1743 struct proc *up) 1744 { 1745 struct ps_strings pss; 1746 struct proc *p; 1747 size_t len, upper_bound, xlen; 1748 struct uio auio; 1749 struct iovec aiov; 1750 vaddr_t argv; 1751 pid_t pid; 1752 int nargv, type, error, i; 1753 char *arg; 1754 char *tmp; 1755 1756 if (namelen != 2) 1757 return (EINVAL); 1758 pid = name[0]; 1759 type = name[1]; 1760 1761 switch (type) { 1762 case KERN_PROC_ARGV: 1763 case KERN_PROC_NARGV: 1764 case KERN_PROC_ENV: 1765 case KERN_PROC_NENV: 1766 /* ok */ 1767 break; 1768 default: 1769 return (EINVAL); 1770 } 1771 1772 /* check pid */ 1773 if ((p = pfind(pid)) == NULL) 1774 return (EINVAL); 1775 1776 /* only root or same user change look at the environment */ 1777 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1778 if (up->p_ucred->cr_uid != 0) { 1779 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1780 up->p_cred->p_ruid != p->p_cred->p_svuid) 1781 return (EPERM); 1782 } 1783 } 1784 1785 if (sizep != NULL && where == NULL) { 1786 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1787 *sizep = sizeof (int); 1788 else 1789 *sizep = ARG_MAX; /* XXX XXX XXX */ 1790 return (0); 1791 } 1792 if (where == NULL || sizep == NULL) 1793 return (EINVAL); 1794 1795 /* 1796 * Zombies don't have a stack, so we can't read their psstrings. 1797 * System processes also don't have a user stack. 1798 */ 1799 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1800 return (EINVAL); 1801 1802 /* 1803 * Lock the process down in memory. 1804 */ 1805 /* XXXCDC: how should locking work here? */ 1806 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1807 return (EFAULT); 1808 1809 p->p_vmspace->vm_refcnt++; /* XXX */ 1810 1811 /* 1812 * Allocate a temporary buffer to hold the arguments. 1813 */ 1814 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1815 1816 /* 1817 * Read in the ps_strings structure. 1818 */ 1819 aiov.iov_base = &pss; 1820 aiov.iov_len = sizeof(pss); 1821 auio.uio_iov = &aiov; 1822 auio.uio_iovcnt = 1; 1823 auio.uio_offset = (vaddr_t)p->p_psstr; 1824 auio.uio_resid = sizeof(pss); 1825 auio.uio_segflg = UIO_SYSSPACE; 1826 auio.uio_rw = UIO_READ; 1827 auio.uio_procp = NULL; 1828 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1829 if (error) 1830 goto done; 1831 1832 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1833 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1834 else 1835 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1836 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1837 error = copyout(&nargv, where, sizeof(nargv)); 1838 *sizep = sizeof(nargv); 1839 goto done; 1840 } 1841 /* 1842 * Now read the address of the argument vector. 1843 */ 1844 switch (type) { 1845 case KERN_PROC_ARGV: 1846 /* XXX compat32 stuff here */ 1847 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1848 break; 1849 case KERN_PROC_ENV: 1850 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1851 break; 1852 default: 1853 return (EINVAL); 1854 } 1855 auio.uio_offset = (off_t)(long)tmp; 1856 aiov.iov_base = &argv; 1857 aiov.iov_len = sizeof(argv); 1858 auio.uio_iov = &aiov; 1859 auio.uio_iovcnt = 1; 1860 auio.uio_resid = sizeof(argv); 1861 auio.uio_segflg = UIO_SYSSPACE; 1862 auio.uio_rw = UIO_READ; 1863 auio.uio_procp = NULL; 1864 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1865 if (error) 1866 goto done; 1867 1868 /* 1869 * Now copy in the actual argument vector, one page at a time, 1870 * since we don't know how long the vector is (though, we do 1871 * know how many NUL-terminated strings are in the vector). 1872 */ 1873 len = 0; 1874 upper_bound = *sizep; 1875 for (; nargv != 0 && len < upper_bound; len += xlen) { 1876 aiov.iov_base = arg; 1877 aiov.iov_len = PAGE_SIZE; 1878 auio.uio_iov = &aiov; 1879 auio.uio_iovcnt = 1; 1880 auio.uio_offset = argv + len; 1881 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1882 auio.uio_resid = xlen; 1883 auio.uio_segflg = UIO_SYSSPACE; 1884 auio.uio_rw = UIO_READ; 1885 auio.uio_procp = NULL; 1886 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1887 if (error) 1888 goto done; 1889 1890 for (i = 0; i < xlen && nargv != 0; i++) { 1891 if (arg[i] == '\0') 1892 nargv--; /* one full string */ 1893 } 1894 1895 /* make sure we don't copyout past the end of the user's buffer */ 1896 if (len + i > upper_bound) 1897 i = upper_bound - len; 1898 1899 error = copyout(arg, (char *)where + len, i); 1900 if (error) 1901 break; 1902 1903 if (nargv == 0) { 1904 len += i; 1905 break; 1906 } 1907 } 1908 *sizep = len; 1909 1910 done: 1911 uvmspace_free(p->p_vmspace); 1912 1913 free(arg, M_TEMP); 1914 return (error); 1915 } 1916 1917 #if NPTY > 0 1918 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1919 1920 /* 1921 * Validate parameters and get old / set new parameters 1922 * for pty sysctl function. 1923 */ 1924 static int 1925 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 1926 { 1927 int error = 0; 1928 int oldmax = 0, newmax = 0; 1929 1930 /* get current value of maxptys */ 1931 oldmax = pty_maxptys(0, 0); 1932 1933 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1934 1935 if (!error && newp) { 1936 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1937 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1938 1939 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1940 return (EINVAL); 1941 1942 } 1943 1944 return (error); 1945 } 1946 #endif /* NPTY > 0 */ 1947
Indexes created Tue Sep 30 11:09:46 GMT 2025