kern_sysctl.c revision 1.93.2.1
1 /* $NetBSD: kern_sysctl.c,v 1.93.2.1 2001/09/07 04:45:37 thorpej 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/proc.h> 67 #include <sys/resource.h> 68 #include <sys/resourcevar.h> 69 #include <sys/syscallargs.h> 70 #include <sys/tty.h> 71 #include <sys/unistd.h> 72 #include <sys/vnode.h> 73 #include <sys/socketvar.h> 74 #define __SYSCTL_PRIVATE 75 #include <sys/sysctl.h> 76 #include <sys/lock.h> 77 78 #include <miscfs/specfs/specdev.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 /* 122 * The `sysctl_memlock' is intended to keep too many processes from 123 * locking down memory by doing sysctls at once. Whether or not this 124 * is really a good idea to worry about it probably a subject of some 125 * debate. 126 */ 127 struct lock sysctl_memlock; 128 129 void 130 sysctl_init(void) 131 { 132 133 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 134 } 135 136 int 137 sys___sysctl(struct proc *p, void *v, register_t *retval) 138 { 139 struct sys___sysctl_args /* { 140 syscallarg(int *) name; 141 syscallarg(u_int) namelen; 142 syscallarg(void *) old; 143 syscallarg(size_t *) oldlenp; 144 syscallarg(void *) new; 145 syscallarg(size_t) newlen; 146 } */ *uap = v; 147 int error; 148 size_t savelen = 0, oldlen = 0; 149 sysctlfn *fn; 150 int name[CTL_MAXNAME]; 151 size_t *oldlenp; 152 153 /* 154 * all top-level sysctl names are non-terminal 155 */ 156 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 157 return (EINVAL); 158 error = copyin(SCARG(uap, name), &name, 159 SCARG(uap, namelen) * sizeof(int)); 160 if (error) 161 return (error); 162 163 /* 164 * For all but CTL_PROC, must be root to change a value. 165 * For CTL_PROC, must be root, or owner of the proc (and not suid), 166 * this is checked in proc_sysctl() (once we know the targer proc). 167 */ 168 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 169 (error = suser(p->p_ucred, &p->p_acflag))) 170 return error; 171 172 switch (name[0]) { 173 case CTL_KERN: 174 fn = kern_sysctl; 175 break; 176 case CTL_HW: 177 fn = hw_sysctl; 178 break; 179 case CTL_VM: 180 fn = uvm_sysctl; 181 break; 182 case CTL_NET: 183 fn = net_sysctl; 184 break; 185 case CTL_VFS: 186 fn = vfs_sysctl; 187 break; 188 case CTL_MACHDEP: 189 fn = cpu_sysctl; 190 break; 191 #ifdef DEBUG 192 case CTL_DEBUG: 193 fn = debug_sysctl; 194 break; 195 #endif 196 #ifdef DDB 197 case CTL_DDB: 198 fn = ddb_sysctl; 199 break; 200 #endif 201 case CTL_PROC: 202 fn = proc_sysctl; 203 break; 204 default: 205 return (EOPNOTSUPP); 206 } 207 208 /* 209 * XXX Hey, we wire `old', but what about `new'? 210 */ 211 212 oldlenp = SCARG(uap, oldlenp); 213 if (oldlenp) { 214 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 215 return (error); 216 oldlenp = &oldlen; 217 } 218 if (SCARG(uap, old) != NULL) { 219 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 220 if (error) 221 return (error); 222 error = uvm_vslock(p, SCARG(uap, old), oldlen, 223 VM_PROT_READ|VM_PROT_WRITE); 224 if (error) { 225 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 226 return error; 227 } 228 savelen = oldlen; 229 } 230 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 231 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 232 if (SCARG(uap, old) != NULL) { 233 uvm_vsunlock(p, SCARG(uap, old), savelen); 234 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 235 } 236 if (error) 237 return (error); 238 if (SCARG(uap, oldlenp)) 239 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 240 return (error); 241 } 242 243 /* 244 * Attributes stored in the kernel. 245 */ 246 char hostname[MAXHOSTNAMELEN]; 247 int hostnamelen; 248 249 char domainname[MAXHOSTNAMELEN]; 250 int domainnamelen; 251 252 long hostid; 253 254 #ifdef INSECURE 255 int securelevel = -1; 256 #else 257 int securelevel = 0; 258 #endif 259 260 #ifndef DEFCORENAME 261 #define DEFCORENAME "%n.core" 262 #endif 263 char defcorename[MAXPATHLEN] = DEFCORENAME; 264 int defcorenamelen = sizeof(DEFCORENAME); 265 266 extern int kern_logsigexit; 267 extern fixpt_t ccpu; 268 269 #ifndef MULTIPROCESSOR 270 #define sysctl_ncpus() 1 271 #endif 272 273 #ifdef MULTIPROCESSOR 274 275 #ifndef CPU_INFO_FOREACH 276 #define CPU_INFO_ITERATOR int 277 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 278 #endif 279 280 static int 281 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 282 { 283 u_int64_t cp_time[CPUSTATES]; 284 int i; 285 struct cpu_info *ci; 286 CPU_INFO_ITERATOR cii; 287 288 for (i=0; i<CPUSTATES; i++) 289 cp_time[i] = 0; 290 291 for (CPU_INFO_FOREACH(cii, ci)) { 292 for (i=0; i<CPUSTATES; i++) 293 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 294 } 295 return (sysctl_rdstruct(oldp, oldlenp, newp, 296 cp_time, sizeof(cp_time))); 297 } 298 299 static int 300 sysctl_ncpus(void) 301 { 302 struct cpu_info *ci; 303 CPU_INFO_ITERATOR cii; 304 305 int ncpus = 0; 306 for (CPU_INFO_FOREACH(cii, ci)) 307 ncpus++; 308 return ncpus; 309 } 310 311 #endif 312 313 /* 314 * kernel related system variables. 315 */ 316 int 317 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 318 void *newp, size_t newlen, struct proc *p) 319 { 320 int error, level, inthostid; 321 int old_autonicetime; 322 int old_vnodes; 323 dev_t consdev; 324 325 /* All sysctl names at this level, except for a few, are terminal. */ 326 switch (name[0]) { 327 case KERN_PROC: 328 case KERN_PROC2: 329 case KERN_PROF: 330 case KERN_MBUF: 331 case KERN_PROC_ARGS: 332 case KERN_SYSVIPC_INFO: 333 case KERN_PIPE: 334 /* Not terminal. */ 335 break; 336 default: 337 if (namelen != 1) 338 return (ENOTDIR); /* overloaded */ 339 } 340 341 switch (name[0]) { 342 case KERN_OSTYPE: 343 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 344 case KERN_OSRELEASE: 345 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 346 case KERN_OSREV: 347 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 348 case KERN_VERSION: 349 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 350 case KERN_MAXVNODES: 351 old_vnodes = desiredvnodes; 352 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 353 if (old_vnodes > desiredvnodes) { 354 desiredvnodes = old_vnodes; 355 return (EINVAL); 356 } 357 return (error); 358 case KERN_MAXPROC: 359 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 360 case KERN_MAXFILES: 361 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 362 case KERN_ARGMAX: 363 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 364 case KERN_SECURELVL: 365 level = securelevel; 366 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 367 newp == NULL) 368 return (error); 369 if (level < securelevel && p->p_pid != 1) 370 return (EPERM); 371 securelevel = level; 372 return (0); 373 case KERN_HOSTNAME: 374 error = sysctl_string(oldp, oldlenp, newp, newlen, 375 hostname, sizeof(hostname)); 376 if (newp && !error) 377 hostnamelen = newlen; 378 return (error); 379 case KERN_DOMAINNAME: 380 error = sysctl_string(oldp, oldlenp, newp, newlen, 381 domainname, sizeof(domainname)); 382 if (newp && !error) 383 domainnamelen = newlen; 384 return (error); 385 case KERN_HOSTID: 386 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 387 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 388 hostid = inthostid; 389 return (error); 390 case KERN_CLOCKRATE: 391 return (sysctl_clockrate(oldp, oldlenp)); 392 case KERN_BOOTTIME: 393 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 394 sizeof(struct timeval))); 395 case KERN_VNODE: 396 return (sysctl_vnode(oldp, oldlenp, p)); 397 case KERN_PROC: 398 case KERN_PROC2: 399 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 400 case KERN_PROC_ARGS: 401 return (sysctl_procargs(name + 1, namelen - 1, 402 oldp, oldlenp, p)); 403 case KERN_FILE: 404 return (sysctl_file(oldp, oldlenp)); 405 #ifdef GPROF 406 case KERN_PROF: 407 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 408 newp, newlen)); 409 #endif 410 case KERN_POSIX1: 411 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 412 case KERN_NGROUPS: 413 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 414 case KERN_JOB_CONTROL: 415 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 416 case KERN_SAVED_IDS: 417 #ifdef _POSIX_SAVED_IDS 418 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 419 #else 420 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 421 #endif 422 case KERN_MAXPARTITIONS: 423 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 424 case KERN_RAWPARTITION: 425 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 426 #ifdef NTP 427 case KERN_NTPTIME: 428 return (sysctl_ntptime(oldp, oldlenp)); 429 #endif 430 case KERN_AUTONICETIME: 431 old_autonicetime = autonicetime; 432 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 433 if (autonicetime < 0) 434 autonicetime = old_autonicetime; 435 return (error); 436 case KERN_AUTONICEVAL: 437 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 438 if (autoniceval < PRIO_MIN) 439 autoniceval = PRIO_MIN; 440 if (autoniceval > PRIO_MAX) 441 autoniceval = PRIO_MAX; 442 return (error); 443 case KERN_RTC_OFFSET: 444 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 445 case KERN_ROOT_DEVICE: 446 return (sysctl_rdstring(oldp, oldlenp, newp, 447 root_device->dv_xname)); 448 case KERN_MSGBUFSIZE: 449 /* 450 * deal with cases where the message buffer has 451 * become corrupted. 452 */ 453 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 454 msgbufenabled = 0; 455 return (ENXIO); 456 } 457 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 458 case KERN_FSYNC: 459 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 460 case KERN_SYSVMSG: 461 #ifdef SYSVMSG 462 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 463 #else 464 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 465 #endif 466 case KERN_SYSVSEM: 467 #ifdef SYSVSEM 468 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 469 #else 470 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 471 #endif 472 case KERN_SYSVSHM: 473 #ifdef SYSVSHM 474 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 475 #else 476 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 477 #endif 478 case KERN_DEFCORENAME: 479 if (newp && newlen < 1) 480 return (EINVAL); 481 error = sysctl_string(oldp, oldlenp, newp, newlen, 482 defcorename, sizeof(defcorename)); 483 if (newp && !error) 484 defcorenamelen = newlen; 485 return (error); 486 case KERN_SYNCHRONIZED_IO: 487 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 488 case KERN_IOV_MAX: 489 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 490 case KERN_MBUF: 491 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 492 newp, newlen)); 493 case KERN_MAPPED_FILES: 494 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 495 case KERN_MEMLOCK: 496 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 497 case KERN_MEMLOCK_RANGE: 498 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 499 case KERN_MEMORY_PROTECTION: 500 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 501 case KERN_LOGIN_NAME_MAX: 502 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 503 case KERN_LOGSIGEXIT: 504 return (sysctl_int(oldp, oldlenp, newp, newlen, 505 &kern_logsigexit)); 506 case KERN_FSCALE: 507 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 508 case KERN_CCPU: 509 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 510 case KERN_CP_TIME: 511 #ifndef MULTIPROCESSOR 512 return (sysctl_rdstruct(oldp, oldlenp, newp, 513 curcpu()->ci_schedstate.spc_cp_time, 514 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 515 #else 516 return (sysctl_docptime(oldp, oldlenp, newp)); 517 #endif 518 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 519 case KERN_SYSVIPC_INFO: 520 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 521 #endif 522 case KERN_MSGBUF: 523 return (sysctl_msgbuf(oldp, oldlenp)); 524 case KERN_CONSDEV: 525 if (cn_tab != NULL) 526 consdev = cn_tab->cn_dev; 527 else 528 consdev = NODEV; 529 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 530 sizeof consdev)); 531 #if NPTY > 0 532 case KERN_MAXPTYS: 533 return sysctl_pty(oldp, oldlenp, newp, newlen); 534 #endif 535 #ifdef NEW_PIPE 536 case KERN_PIPE: 537 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 538 newp, newlen)); 539 #endif 540 case KERN_MAXPHYS: 541 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 542 case KERN_SBMAX: 543 { 544 int new_sbmax = sb_max; 545 546 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 547 if (error == 0) { 548 if (new_sbmax < (16 * 1024)) /* sanity */ 549 return (EINVAL); 550 sb_max = new_sbmax; 551 } 552 return (error); 553 } 554 default: 555 return (EOPNOTSUPP); 556 } 557 /* NOTREACHED */ 558 } 559 560 /* 561 * hardware related system variables. 562 */ 563 int 564 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 565 void *newp, size_t newlen, struct proc *p) 566 { 567 568 /* all sysctl names at this level are terminal */ 569 if (namelen != 1) 570 return (ENOTDIR); /* overloaded */ 571 572 switch (name[0]) { 573 case HW_MACHINE: 574 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 575 case HW_MACHINE_ARCH: 576 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 577 case HW_MODEL: 578 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 579 case HW_NCPU: 580 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 581 case HW_BYTEORDER: 582 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 583 case HW_PHYSMEM: 584 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 585 case HW_USERMEM: 586 return (sysctl_rdint(oldp, oldlenp, newp, 587 ctob(physmem - uvmexp.wired))); 588 case HW_PAGESIZE: 589 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 590 case HW_ALIGNBYTES: 591 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 592 case HW_CNMAGIC: { 593 char magic[CNS_LEN]; 594 int error; 595 596 if (oldp) 597 cn_get_magic(magic, CNS_LEN); 598 error = sysctl_string(oldp, oldlenp, newp, newlen, 599 magic, sizeof(magic)); 600 if (newp && !error) { 601 error = cn_set_magic(magic); 602 } 603 return (error); 604 } 605 default: 606 return (EOPNOTSUPP); 607 } 608 /* NOTREACHED */ 609 } 610 611 #ifdef DEBUG 612 /* 613 * Debugging related system variables. 614 */ 615 struct ctldebug debug0, debug1, debug2, debug3, debug4; 616 struct ctldebug debug5, debug6, debug7, debug8, debug9; 617 struct ctldebug debug10, debug11, debug12, debug13, debug14; 618 struct ctldebug debug15, debug16, debug17, debug18, debug19; 619 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 620 &debug0, &debug1, &debug2, &debug3, &debug4, 621 &debug5, &debug6, &debug7, &debug8, &debug9, 622 &debug10, &debug11, &debug12, &debug13, &debug14, 623 &debug15, &debug16, &debug17, &debug18, &debug19, 624 }; 625 626 int 627 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 628 void *newp, size_t newlen, struct proc *p) 629 { 630 struct ctldebug *cdp; 631 632 /* all sysctl names at this level are name and field */ 633 if (namelen != 2) 634 return (ENOTDIR); /* overloaded */ 635 cdp = debugvars[name[0]]; 636 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 637 return (EOPNOTSUPP); 638 switch (name[1]) { 639 case CTL_DEBUG_NAME: 640 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 641 case CTL_DEBUG_VALUE: 642 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 643 default: 644 return (EOPNOTSUPP); 645 } 646 /* NOTREACHED */ 647 } 648 #endif /* DEBUG */ 649 650 int 651 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 652 void *newp, size_t newlen, struct proc *p) 653 { 654 struct proc *ptmp = NULL; 655 const struct proclist_desc *pd; 656 int error = 0; 657 struct rlimit alim; 658 struct plimit *newplim; 659 char *tmps = NULL; 660 int i, curlen, len; 661 662 if (namelen < 2) 663 return EINVAL; 664 665 if (name[0] == PROC_CURPROC) { 666 ptmp = p; 667 } else { 668 proclist_lock_read(); 669 for (pd = proclists; pd->pd_list != NULL; pd++) { 670 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 671 ptmp = LIST_NEXT(ptmp, p_list)) { 672 /* Skip embryonic processes. */ 673 if (ptmp->p_stat == SIDL) 674 continue; 675 if (ptmp->p_pid == (pid_t)name[0]) 676 break; 677 } 678 if (ptmp != NULL) 679 break; 680 } 681 proclist_unlock_read(); 682 if (ptmp == NULL) 683 return(ESRCH); 684 if (p->p_ucred->cr_uid != 0) { 685 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 686 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 687 return EPERM; 688 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 689 return EPERM; /* sgid proc */ 690 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 691 if (p->p_ucred->cr_groups[i] == 692 ptmp->p_cred->p_rgid) 693 break; 694 } 695 if (i == p->p_ucred->cr_ngroups) 696 return EPERM; 697 } 698 } 699 if (name[1] == PROC_PID_CORENAME) { 700 if (namelen != 2) 701 return EINVAL; 702 /* 703 * Can't use sysctl_string() here because we may malloc a new 704 * area during the process, so we have to do it by hand. 705 */ 706 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 707 if (oldlenp && *oldlenp < curlen) { 708 if (!oldp) 709 *oldlenp = curlen; 710 return (ENOMEM); 711 } 712 if (newp) { 713 if (securelevel > 2) 714 return EPERM; 715 if (newlen > MAXPATHLEN) 716 return ENAMETOOLONG; 717 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 718 if (tmps == NULL) 719 return ENOMEM; 720 error = copyin(newp, tmps, newlen + 1); 721 tmps[newlen] = '\0'; 722 if (error) 723 goto cleanup; 724 /* Enforce to be either 'core' for end with '.core' */ 725 if (newlen < 4) { /* c.o.r.e */ 726 error = EINVAL; 727 goto cleanup; 728 } 729 len = newlen - 4; 730 if (len > 0) { 731 if (tmps[len - 1] != '.' && 732 tmps[len - 1] != '/') { 733 error = EINVAL; 734 goto cleanup; 735 } 736 } 737 if (strcmp(&tmps[len], "core") != 0) { 738 error = EINVAL; 739 goto cleanup; 740 } 741 } 742 if (oldp && oldlenp) { 743 *oldlenp = curlen; 744 error = copyout(ptmp->p_limit->pl_corename, oldp, 745 curlen); 746 } 747 if (newp && error == 0) { 748 /* if the 2 strings are identical, don't limcopy() */ 749 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 750 error = 0; 751 goto cleanup; 752 } 753 if (ptmp->p_limit->p_refcnt > 1 && 754 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 755 newplim = limcopy(ptmp->p_limit); 756 limfree(ptmp->p_limit); 757 ptmp->p_limit = newplim; 758 } else if (ptmp->p_limit->pl_corename != defcorename) { 759 free(ptmp->p_limit->pl_corename, M_TEMP); 760 } 761 ptmp->p_limit->pl_corename = tmps; 762 return (0); 763 } 764 cleanup: 765 if (tmps) 766 free(tmps, M_TEMP); 767 return (error); 768 } 769 if (name[1] == PROC_PID_LIMIT) { 770 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 771 return EINVAL; 772 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 773 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 774 error = sysctl_quad(oldp, oldlenp, newp, newlen, 775 &alim.rlim_max); 776 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 777 error = sysctl_quad(oldp, oldlenp, newp, newlen, 778 &alim.rlim_cur); 779 else 780 error = EINVAL; 781 782 if (error) 783 return error; 784 785 if (newp) 786 error = dosetrlimit(ptmp, p->p_cred, 787 name[2] - 1, &alim); 788 return error; 789 } 790 return (EINVAL); 791 } 792 793 /* 794 * Convenience macros. 795 */ 796 797 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 798 if (oldlenp) { \ 799 if (!oldp) \ 800 *oldlenp = len; \ 801 else { \ 802 if (*oldlenp < len) \ 803 return(ENOMEM); \ 804 *oldlenp = len; \ 805 error = copyout((caddr_t)valp, oldp, len); \ 806 } \ 807 } 808 809 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 810 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 811 812 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 813 if (newp && newlen != len) \ 814 return (EINVAL); 815 816 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 817 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 818 819 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 820 if (error == 0 && newp) \ 821 error = copyin(newp, valp, len); 822 823 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 824 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 825 826 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 827 if (oldlenp) { \ 828 len = strlen(str) + 1; \ 829 if (!oldp) \ 830 *oldlenp = len; \ 831 else { \ 832 if (*oldlenp < len) { \ 833 err2 = ENOMEM; \ 834 len = *oldlenp; \ 835 } else \ 836 *oldlenp = len; \ 837 error = copyout(str, oldp, len);\ 838 if (error == 0) \ 839 error = err2; \ 840 } \ 841 } 842 843 /* 844 * Validate parameters and get old / set new parameters 845 * for an integer-valued sysctl function. 846 */ 847 int 848 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 849 { 850 int error = 0; 851 852 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 853 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 854 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 855 856 return (error); 857 } 858 859 860 /* 861 * As above, but read-only. 862 */ 863 int 864 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 865 { 866 int error = 0; 867 868 if (newp) 869 return (EPERM); 870 871 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 872 873 return (error); 874 } 875 876 /* 877 * Validate parameters and get old / set new parameters 878 * for an quad-valued sysctl function. 879 */ 880 int 881 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 882 quad_t *valp) 883 { 884 int error = 0; 885 886 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 887 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 888 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 889 890 return (error); 891 } 892 893 /* 894 * As above, but read-only. 895 */ 896 int 897 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 898 { 899 int error = 0; 900 901 if (newp) 902 return (EPERM); 903 904 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 905 906 return (error); 907 } 908 909 /* 910 * Validate parameters and get old / set new parameters 911 * for a string-valued sysctl function. 912 */ 913 int 914 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 915 int maxlen) 916 { 917 int len, error = 0, err2 = 0; 918 919 if (newp && newlen >= maxlen) 920 return (EINVAL); 921 922 SYSCTL_STRING_CORE(oldp, oldlenp, str); 923 924 if (error == 0 && newp) { 925 error = copyin(newp, str, newlen); 926 str[newlen] = 0; 927 } 928 return (error); 929 } 930 931 /* 932 * As above, but read-only. 933 */ 934 int 935 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 936 { 937 int len, error = 0, err2 = 0; 938 939 if (newp) 940 return (EPERM); 941 942 SYSCTL_STRING_CORE(oldp, oldlenp, str); 943 944 return (error); 945 } 946 947 /* 948 * Validate parameters and get old / set new parameters 949 * for a structure oriented sysctl function. 950 */ 951 int 952 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 953 int len) 954 { 955 int error = 0; 956 957 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 958 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 959 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 960 961 return (error); 962 } 963 964 /* 965 * Validate parameters and get old parameters 966 * for a structure oriented sysctl function. 967 */ 968 int 969 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 970 int len) 971 { 972 int error = 0; 973 974 if (newp) 975 return (EPERM); 976 977 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 978 979 return (error); 980 } 981 982 /* 983 * As above, but can return a truncated result. 984 */ 985 int 986 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 987 int len) 988 { 989 int error = 0; 990 991 if (newp) 992 return (EPERM); 993 994 len = min(*oldlenp, len); 995 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 996 997 return (error); 998 } 999 1000 /* 1001 * Get file structures. 1002 */ 1003 static int 1004 sysctl_file(void *vwhere, size_t *sizep) 1005 { 1006 int buflen, error; 1007 struct file *fp; 1008 char *start, *where; 1009 1010 start = where = vwhere; 1011 buflen = *sizep; 1012 if (where == NULL) { 1013 /* 1014 * overestimate by 10 files 1015 */ 1016 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1017 return (0); 1018 } 1019 1020 /* 1021 * first copyout filehead 1022 */ 1023 if (buflen < sizeof(filehead)) { 1024 *sizep = 0; 1025 return (0); 1026 } 1027 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1028 if (error) 1029 return (error); 1030 buflen -= sizeof(filehead); 1031 where += sizeof(filehead); 1032 1033 /* 1034 * followed by an array of file structures 1035 */ 1036 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1037 if (buflen < sizeof(struct file)) { 1038 *sizep = where - start; 1039 return (ENOMEM); 1040 } 1041 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1042 if (error) 1043 return (error); 1044 buflen -= sizeof(struct file); 1045 where += sizeof(struct file); 1046 } 1047 *sizep = where - start; 1048 return (0); 1049 } 1050 1051 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1052 #define FILL_PERM(src, dst) do { \ 1053 (dst)._key = (src)._key; \ 1054 (dst).uid = (src).uid; \ 1055 (dst).gid = (src).gid; \ 1056 (dst).cuid = (src).cuid; \ 1057 (dst).cgid = (src).cgid; \ 1058 (dst).mode = (src).mode; \ 1059 (dst)._seq = (src)._seq; \ 1060 } while (0); 1061 #define FILL_MSG(src, dst) do { \ 1062 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1063 (dst).msg_qnum = (src).msg_qnum; \ 1064 (dst).msg_qbytes = (src).msg_qbytes; \ 1065 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1066 (dst).msg_lspid = (src).msg_lspid; \ 1067 (dst).msg_lrpid = (src).msg_lrpid; \ 1068 (dst).msg_stime = (src).msg_stime; \ 1069 (dst).msg_rtime = (src).msg_rtime; \ 1070 (dst).msg_ctime = (src).msg_ctime; \ 1071 } while (0) 1072 #define FILL_SEM(src, dst) do { \ 1073 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1074 (dst).sem_nsems = (src).sem_nsems; \ 1075 (dst).sem_otime = (src).sem_otime; \ 1076 (dst).sem_ctime = (src).sem_ctime; \ 1077 } while (0) 1078 #define FILL_SHM(src, dst) do { \ 1079 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1080 (dst).shm_segsz = (src).shm_segsz; \ 1081 (dst).shm_lpid = (src).shm_lpid; \ 1082 (dst).shm_cpid = (src).shm_cpid; \ 1083 (dst).shm_atime = (src).shm_atime; \ 1084 (dst).shm_dtime = (src).shm_dtime; \ 1085 (dst).shm_ctime = (src).shm_ctime; \ 1086 (dst).shm_nattch = (src).shm_nattch; \ 1087 } while (0) 1088 1089 static int 1090 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1091 { 1092 #ifdef SYSVMSG 1093 struct msg_sysctl_info *msgsi; 1094 #endif 1095 #ifdef SYSVSEM 1096 struct sem_sysctl_info *semsi; 1097 #endif 1098 #ifdef SYSVSHM 1099 struct shm_sysctl_info *shmsi; 1100 #endif 1101 size_t infosize, dssize, tsize, buflen; 1102 void *buf = NULL, *buf2; 1103 char *start; 1104 int32_t nds; 1105 int i, error, ret; 1106 1107 if (namelen != 1) 1108 return (EINVAL); 1109 1110 start = where; 1111 buflen = *sizep; 1112 1113 switch (*name) { 1114 case KERN_SYSVIPC_MSG_INFO: 1115 #ifdef SYSVMSG 1116 infosize = sizeof(msgsi->msginfo); 1117 nds = msginfo.msgmni; 1118 dssize = sizeof(msgsi->msgids[0]); 1119 break; 1120 #else 1121 return (EINVAL); 1122 #endif 1123 case KERN_SYSVIPC_SEM_INFO: 1124 #ifdef SYSVSEM 1125 infosize = sizeof(semsi->seminfo); 1126 nds = seminfo.semmni; 1127 dssize = sizeof(semsi->semids[0]); 1128 break; 1129 #else 1130 return (EINVAL); 1131 #endif 1132 case KERN_SYSVIPC_SHM_INFO: 1133 #ifdef SYSVSHM 1134 infosize = sizeof(shmsi->shminfo); 1135 nds = shminfo.shmmni; 1136 dssize = sizeof(shmsi->shmids[0]); 1137 break; 1138 #else 1139 return (EINVAL); 1140 #endif 1141 default: 1142 return (EINVAL); 1143 } 1144 /* 1145 * Round infosize to 64 bit boundary if requesting more than just 1146 * the info structure or getting the total data size. 1147 */ 1148 if (where == NULL || *sizep > infosize) 1149 infosize = ((infosize + 7) / 8) * 8; 1150 tsize = infosize + nds * dssize; 1151 1152 /* Return just the total size required. */ 1153 if (where == NULL) { 1154 *sizep = tsize; 1155 return (0); 1156 } 1157 1158 /* Not enough room for even the info struct. */ 1159 if (buflen < infosize) { 1160 *sizep = 0; 1161 return (ENOMEM); 1162 } 1163 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1164 memset(buf, 0, min(tsize, buflen)); 1165 1166 switch (*name) { 1167 #ifdef SYSVMSG 1168 case KERN_SYSVIPC_MSG_INFO: 1169 msgsi = (struct msg_sysctl_info *)buf; 1170 buf2 = &msgsi->msgids[0]; 1171 msgsi->msginfo = msginfo; 1172 break; 1173 #endif 1174 #ifdef SYSVSEM 1175 case KERN_SYSVIPC_SEM_INFO: 1176 semsi = (struct sem_sysctl_info *)buf; 1177 buf2 = &semsi->semids[0]; 1178 semsi->seminfo = seminfo; 1179 break; 1180 #endif 1181 #ifdef SYSVSHM 1182 case KERN_SYSVIPC_SHM_INFO: 1183 shmsi = (struct shm_sysctl_info *)buf; 1184 buf2 = &shmsi->shmids[0]; 1185 shmsi->shminfo = shminfo; 1186 break; 1187 #endif 1188 } 1189 buflen -= infosize; 1190 1191 ret = 0; 1192 if (buflen > 0) { 1193 /* Fill in the IPC data structures. */ 1194 for (i = 0; i < nds; i++) { 1195 if (buflen < dssize) { 1196 ret = ENOMEM; 1197 break; 1198 } 1199 switch (*name) { 1200 #ifdef SYSVMSG 1201 case KERN_SYSVIPC_MSG_INFO: 1202 FILL_MSG(msqids[i], msgsi->msgids[i]); 1203 break; 1204 #endif 1205 #ifdef SYSVSEM 1206 case KERN_SYSVIPC_SEM_INFO: 1207 FILL_SEM(sema[i], semsi->semids[i]); 1208 break; 1209 #endif 1210 #ifdef SYSVSHM 1211 case KERN_SYSVIPC_SHM_INFO: 1212 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1213 break; 1214 #endif 1215 } 1216 buflen -= dssize; 1217 } 1218 } 1219 *sizep -= buflen; 1220 error = copyout(buf, start, *sizep); 1221 /* If copyout succeeded, use return code set earlier. */ 1222 if (error == 0) 1223 error = ret; 1224 if (buf) 1225 free(buf, M_TEMP); 1226 return (error); 1227 } 1228 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1229 1230 static int 1231 sysctl_msgbuf(void *vwhere, size_t *sizep) 1232 { 1233 char *where = vwhere; 1234 size_t len, maxlen = *sizep; 1235 long beg, end; 1236 int error; 1237 1238 /* 1239 * deal with cases where the message buffer has 1240 * become corrupted. 1241 */ 1242 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1243 msgbufenabled = 0; 1244 return (ENXIO); 1245 } 1246 1247 if (where == NULL) { 1248 /* always return full buffer size */ 1249 *sizep = msgbufp->msg_bufs; 1250 return (0); 1251 } 1252 1253 error = 0; 1254 maxlen = min(msgbufp->msg_bufs, maxlen); 1255 1256 /* 1257 * First, copy from the write pointer to the end of 1258 * message buffer. 1259 */ 1260 beg = msgbufp->msg_bufx; 1261 end = msgbufp->msg_bufs; 1262 while (maxlen > 0) { 1263 len = min(end - beg, maxlen); 1264 if (len == 0) 1265 break; 1266 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1267 if (error) 1268 break; 1269 where += len; 1270 maxlen -= len; 1271 1272 /* 1273 * ... then, copy from the beginning of message buffer to 1274 * the write pointer. 1275 */ 1276 beg = 0; 1277 end = msgbufp->msg_bufx; 1278 } 1279 return (error); 1280 } 1281 1282 /* 1283 * try over estimating by 5 procs 1284 */ 1285 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1286 1287 static int 1288 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1289 { 1290 struct eproc eproc; 1291 struct kinfo_proc2 kproc2; 1292 struct kinfo_proc *dp; 1293 struct proc *p; 1294 const struct proclist_desc *pd; 1295 char *where, *dp2; 1296 int type, op, arg, elem_size, elem_count; 1297 int buflen, needed, error; 1298 1299 dp = vwhere; 1300 dp2 = where = vwhere; 1301 buflen = where != NULL ? *sizep : 0; 1302 error = needed = 0; 1303 type = name[0]; 1304 1305 if (type == KERN_PROC) { 1306 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1307 return (EINVAL); 1308 op = name[1]; 1309 if (op != KERN_PROC_ALL) 1310 arg = name[2]; 1311 } else { 1312 if (namelen != 5) 1313 return (EINVAL); 1314 op = name[1]; 1315 arg = name[2]; 1316 elem_size = name[3]; 1317 elem_count = name[4]; 1318 } 1319 1320 proclist_lock_read(); 1321 1322 pd = proclists; 1323 again: 1324 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1325 /* 1326 * Skip embryonic processes. 1327 */ 1328 if (p->p_stat == SIDL) 1329 continue; 1330 /* 1331 * TODO - make more efficient (see notes below). 1332 * do by session. 1333 */ 1334 switch (op) { 1335 1336 case KERN_PROC_PID: 1337 /* could do this with just a lookup */ 1338 if (p->p_pid != (pid_t)arg) 1339 continue; 1340 break; 1341 1342 case KERN_PROC_PGRP: 1343 /* could do this by traversing pgrp */ 1344 if (p->p_pgrp->pg_id != (pid_t)arg) 1345 continue; 1346 break; 1347 1348 case KERN_PROC_SESSION: 1349 if (p->p_session->s_sid != (pid_t)arg) 1350 continue; 1351 break; 1352 1353 case KERN_PROC_TTY: 1354 if (arg == KERN_PROC_TTY_REVOKE) { 1355 if ((p->p_flag & P_CONTROLT) == 0 || 1356 p->p_session->s_ttyp == NULL || 1357 p->p_session->s_ttyvp != NULL) 1358 continue; 1359 } else if ((p->p_flag & P_CONTROLT) == 0 || 1360 p->p_session->s_ttyp == NULL) { 1361 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1362 continue; 1363 } else if (p->p_session->s_ttyp->t_devvp->v_rdev != 1364 (dev_t)arg) 1365 continue; 1366 break; 1367 1368 case KERN_PROC_UID: 1369 if (p->p_ucred->cr_uid != (uid_t)arg) 1370 continue; 1371 break; 1372 1373 case KERN_PROC_RUID: 1374 if (p->p_cred->p_ruid != (uid_t)arg) 1375 continue; 1376 break; 1377 1378 case KERN_PROC_GID: 1379 if (p->p_ucred->cr_gid != (uid_t)arg) 1380 continue; 1381 break; 1382 1383 case KERN_PROC_RGID: 1384 if (p->p_cred->p_rgid != (uid_t)arg) 1385 continue; 1386 break; 1387 1388 case KERN_PROC_ALL: 1389 /* allow everything */ 1390 break; 1391 1392 default: 1393 error = EINVAL; 1394 goto cleanup; 1395 } 1396 if (type == KERN_PROC) { 1397 if (buflen >= sizeof(struct kinfo_proc)) { 1398 fill_eproc(p, &eproc); 1399 error = copyout((caddr_t)p, &dp->kp_proc, 1400 sizeof(struct proc)); 1401 if (error) 1402 goto cleanup; 1403 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1404 sizeof(eproc)); 1405 if (error) 1406 goto cleanup; 1407 dp++; 1408 buflen -= sizeof(struct kinfo_proc); 1409 } 1410 needed += sizeof(struct kinfo_proc); 1411 } else { /* KERN_PROC2 */ 1412 if (buflen >= elem_size && elem_count > 0) { 1413 fill_kproc2(p, &kproc2); 1414 /* 1415 * Copy out elem_size, but not larger than 1416 * the size of a struct kinfo_proc2. 1417 */ 1418 error = copyout(&kproc2, dp2, 1419 min(sizeof(kproc2), elem_size)); 1420 if (error) 1421 goto cleanup; 1422 dp2 += elem_size; 1423 buflen -= elem_size; 1424 elem_count--; 1425 } 1426 needed += elem_size; 1427 } 1428 } 1429 pd++; 1430 if (pd->pd_list != NULL) 1431 goto again; 1432 proclist_unlock_read(); 1433 1434 if (where != NULL) { 1435 if (type == KERN_PROC) 1436 *sizep = (caddr_t)dp - where; 1437 else 1438 *sizep = dp2 - where; 1439 if (needed > *sizep) 1440 return (ENOMEM); 1441 } else { 1442 needed += KERN_PROCSLOP; 1443 *sizep = needed; 1444 } 1445 return (0); 1446 cleanup: 1447 proclist_unlock_read(); 1448 return (error); 1449 } 1450 1451 /* 1452 * Fill in an eproc structure for the specified process. 1453 */ 1454 void 1455 fill_eproc(struct proc *p, struct eproc *ep) 1456 { 1457 struct tty *tp; 1458 1459 ep->e_paddr = p; 1460 ep->e_sess = p->p_session; 1461 ep->e_pcred = *p->p_cred; 1462 ep->e_ucred = *p->p_ucred; 1463 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1464 ep->e_vm.vm_rssize = 0; 1465 ep->e_vm.vm_tsize = 0; 1466 ep->e_vm.vm_dsize = 0; 1467 ep->e_vm.vm_ssize = 0; 1468 /* ep->e_vm.vm_pmap = XXX; */ 1469 } else { 1470 struct vmspace *vm = p->p_vmspace; 1471 1472 ep->e_vm.vm_rssize = vm_resident_count(vm); 1473 ep->e_vm.vm_tsize = vm->vm_tsize; 1474 ep->e_vm.vm_dsize = vm->vm_dsize; 1475 ep->e_vm.vm_ssize = vm->vm_ssize; 1476 } 1477 if (p->p_pptr) 1478 ep->e_ppid = p->p_pptr->p_pid; 1479 else 1480 ep->e_ppid = 0; 1481 ep->e_pgid = p->p_pgrp->pg_id; 1482 ep->e_sid = ep->e_sess->s_sid; 1483 ep->e_jobc = p->p_pgrp->pg_jobc; 1484 if ((p->p_flag & P_CONTROLT) && 1485 (tp = ep->e_sess->s_ttyp)) { 1486 ep->e_tdev = tp->t_devvp->v_rdev; 1487 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1488 ep->e_tsess = tp->t_session; 1489 } else 1490 ep->e_tdev = NODEV; 1491 if (p->p_wmesg) 1492 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1493 ep->e_xsize = ep->e_xrssize = 0; 1494 ep->e_xccount = ep->e_xswrss = 0; 1495 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1496 if (SESS_LEADER(p)) 1497 ep->e_flag |= EPROC_SLEADER; 1498 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1499 } 1500 1501 /* 1502 * Fill in an eproc structure for the specified process. 1503 */ 1504 static void 1505 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1506 { 1507 struct tty *tp; 1508 1509 memset(ki, 0, sizeof(*ki)); 1510 1511 ki->p_forw = PTRTOINT64(p->p_forw); 1512 ki->p_back = PTRTOINT64(p->p_back); 1513 ki->p_paddr = PTRTOINT64(p); 1514 1515 ki->p_addr = PTRTOINT64(p->p_addr); 1516 ki->p_fd = PTRTOINT64(p->p_fd); 1517 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1518 ki->p_stats = PTRTOINT64(p->p_stats); 1519 ki->p_limit = PTRTOINT64(p->p_limit); 1520 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1521 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1522 ki->p_sess = PTRTOINT64(p->p_session); 1523 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1524 ki->p_ru = PTRTOINT64(p->p_ru); 1525 1526 ki->p_eflag = 0; 1527 ki->p_exitsig = p->p_exitsig; 1528 ki->p_flag = p->p_flag; 1529 1530 ki->p_pid = p->p_pid; 1531 if (p->p_pptr) 1532 ki->p_ppid = p->p_pptr->p_pid; 1533 else 1534 ki->p_ppid = 0; 1535 ki->p_sid = p->p_session->s_sid; 1536 ki->p__pgid = p->p_pgrp->pg_id; 1537 1538 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1539 1540 ki->p_uid = p->p_ucred->cr_uid; 1541 ki->p_ruid = p->p_cred->p_ruid; 1542 ki->p_gid = p->p_ucred->cr_gid; 1543 ki->p_rgid = p->p_cred->p_rgid; 1544 1545 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1546 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1547 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1548 1549 ki->p_jobc = p->p_pgrp->pg_jobc; 1550 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1551 ki->p_tdev = tp->t_devvp->v_rdev; 1552 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1553 ki->p_tsess = PTRTOINT64(tp->t_session); 1554 } else { 1555 ki->p_tdev = NODEV; 1556 } 1557 1558 ki->p_estcpu = p->p_estcpu; 1559 ki->p_rtime_sec = p->p_rtime.tv_sec; 1560 ki->p_rtime_usec = p->p_rtime.tv_usec; 1561 ki->p_cpticks = p->p_cpticks; 1562 ki->p_pctcpu = p->p_pctcpu; 1563 ki->p_swtime = p->p_swtime; 1564 ki->p_slptime = p->p_slptime; 1565 if (p->p_stat == SONPROC) { 1566 KDASSERT(p->p_cpu != NULL); 1567 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1568 } else 1569 ki->p_schedflags = 0; 1570 1571 ki->p_uticks = p->p_uticks; 1572 ki->p_sticks = p->p_sticks; 1573 ki->p_iticks = p->p_iticks; 1574 1575 ki->p_tracep = PTRTOINT64(p->p_tracep); 1576 ki->p_traceflag = p->p_traceflag; 1577 1578 ki->p_holdcnt = p->p_holdcnt; 1579 1580 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1581 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1582 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1583 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1584 1585 ki->p_stat = p->p_stat; 1586 ki->p_priority = p->p_priority; 1587 ki->p_usrpri = p->p_usrpri; 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 if (p->p_wmesg) 1597 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1598 ki->p_wchan = PTRTOINT64(p->p_wchan); 1599 1600 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1601 1602 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1603 ki->p_vm_rssize = 0; 1604 ki->p_vm_tsize = 0; 1605 ki->p_vm_dsize = 0; 1606 ki->p_vm_ssize = 0; 1607 } else { 1608 struct vmspace *vm = p->p_vmspace; 1609 1610 ki->p_vm_rssize = vm_resident_count(vm); 1611 ki->p_vm_tsize = vm->vm_tsize; 1612 ki->p_vm_dsize = vm->vm_dsize; 1613 ki->p_vm_ssize = vm->vm_ssize; 1614 } 1615 1616 if (p->p_session->s_ttyvp) 1617 ki->p_eflag |= EPROC_CTTY; 1618 if (SESS_LEADER(p)) 1619 ki->p_eflag |= EPROC_SLEADER; 1620 1621 /* XXX Is this double check necessary? */ 1622 if ((p->p_flag & P_INMEM) == 0 || P_ZOMBIE(p)) { 1623 ki->p_uvalid = 0; 1624 } else { 1625 ki->p_uvalid = 1; 1626 1627 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1628 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1629 1630 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1631 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1632 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1633 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1634 1635 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1636 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1637 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1638 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1639 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1640 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1641 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1642 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1643 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1644 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1645 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1646 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1647 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1648 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1649 1650 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1651 p->p_stats->p_cru.ru_stime.tv_sec; 1652 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1653 p->p_stats->p_cru.ru_stime.tv_usec; 1654 } 1655 #ifdef MULTIPROCESSOR 1656 if (p->p_cpu != NULL) 1657 ki->p_cpuid = p->p_cpu->ci_cpuid; 1658 else 1659 #endif 1660 ki->p_cpuid = KI_NOCPU; 1661 } 1662 1663 int 1664 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1665 struct proc *up) 1666 { 1667 struct ps_strings pss; 1668 struct proc *p; 1669 size_t len, upper_bound, xlen; 1670 struct uio auio; 1671 struct iovec aiov; 1672 vaddr_t argv; 1673 pid_t pid; 1674 int nargv, type, error, i; 1675 char *arg; 1676 char *tmp; 1677 1678 if (namelen != 2) 1679 return (EINVAL); 1680 pid = name[0]; 1681 type = name[1]; 1682 1683 switch (type) { 1684 case KERN_PROC_ARGV: 1685 case KERN_PROC_NARGV: 1686 case KERN_PROC_ENV: 1687 case KERN_PROC_NENV: 1688 /* ok */ 1689 break; 1690 default: 1691 return (EINVAL); 1692 } 1693 1694 /* check pid */ 1695 if ((p = pfind(pid)) == NULL) 1696 return (EINVAL); 1697 1698 /* only root or same user change look at the environment */ 1699 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1700 if (up->p_ucred->cr_uid != 0) { 1701 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1702 up->p_cred->p_ruid != p->p_cred->p_svuid) 1703 return (EPERM); 1704 } 1705 } 1706 1707 if (sizep != NULL && where == NULL) { 1708 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1709 *sizep = sizeof (int); 1710 else 1711 *sizep = ARG_MAX; /* XXX XXX XXX */ 1712 return (0); 1713 } 1714 if (where == NULL || sizep == NULL) 1715 return (EINVAL); 1716 1717 /* 1718 * Zombies don't have a stack, so we can't read their psstrings. 1719 * System processes also don't have a user stack. 1720 */ 1721 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1722 return (EINVAL); 1723 1724 /* 1725 * Lock the process down in memory. 1726 */ 1727 /* XXXCDC: how should locking work here? */ 1728 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1729 return (EFAULT); 1730 p->p_vmspace->vm_refcnt++; /* XXX */ 1731 1732 /* 1733 * Allocate a temporary buffer to hold the arguments. 1734 */ 1735 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1736 1737 /* 1738 * Read in the ps_strings structure. 1739 */ 1740 aiov.iov_base = &pss; 1741 aiov.iov_len = sizeof(pss); 1742 auio.uio_iov = &aiov; 1743 auio.uio_iovcnt = 1; 1744 auio.uio_offset = (vaddr_t)p->p_psstr; 1745 auio.uio_resid = sizeof(pss); 1746 auio.uio_segflg = UIO_SYSSPACE; 1747 auio.uio_rw = UIO_READ; 1748 auio.uio_procp = NULL; 1749 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1750 if (error) 1751 goto done; 1752 1753 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1754 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1755 else 1756 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1757 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1758 error = copyout(&nargv, where, sizeof(nargv)); 1759 *sizep = sizeof(nargv); 1760 goto done; 1761 } 1762 /* 1763 * Now read the address of the argument vector. 1764 */ 1765 switch (type) { 1766 case KERN_PROC_ARGV: 1767 /* XXX compat32 stuff here */ 1768 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1769 break; 1770 case KERN_PROC_ENV: 1771 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1772 break; 1773 default: 1774 return (EINVAL); 1775 } 1776 auio.uio_offset = (off_t)(long)tmp; 1777 aiov.iov_base = &argv; 1778 aiov.iov_len = sizeof(argv); 1779 auio.uio_iov = &aiov; 1780 auio.uio_iovcnt = 1; 1781 auio.uio_resid = sizeof(argv); 1782 auio.uio_segflg = UIO_SYSSPACE; 1783 auio.uio_rw = UIO_READ; 1784 auio.uio_procp = NULL; 1785 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1786 if (error) 1787 goto done; 1788 1789 /* 1790 * Now copy in the actual argument vector, one page at a time, 1791 * since we don't know how long the vector is (though, we do 1792 * know how many NUL-terminated strings are in the vector). 1793 */ 1794 len = 0; 1795 upper_bound = *sizep; 1796 for (; nargv != 0 && len < upper_bound; len += xlen) { 1797 aiov.iov_base = arg; 1798 aiov.iov_len = PAGE_SIZE; 1799 auio.uio_iov = &aiov; 1800 auio.uio_iovcnt = 1; 1801 auio.uio_offset = argv + len; 1802 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1803 auio.uio_resid = xlen; 1804 auio.uio_segflg = UIO_SYSSPACE; 1805 auio.uio_rw = UIO_READ; 1806 auio.uio_procp = NULL; 1807 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1808 if (error) 1809 goto done; 1810 1811 for (i = 0; i < xlen && nargv != 0; i++) { 1812 if (arg[i] == '\0') 1813 nargv--; /* one full string */ 1814 } 1815 1816 /* make sure we don't copyout past the end of the user's buffer */ 1817 if (len + i > upper_bound) 1818 i = upper_bound - len; 1819 1820 error = copyout(arg, (char *)where + len, i); 1821 if (error) 1822 break; 1823 1824 if (nargv == 0) { 1825 len += i; 1826 break; 1827 } 1828 } 1829 *sizep = len; 1830 1831 done: 1832 uvmspace_free(p->p_vmspace); 1833 1834 free(arg, M_TEMP); 1835 return (error); 1836 } 1837 1838 #if NPTY > 0 1839 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1840 1841 /* 1842 * Validate parameters and get old / set new parameters 1843 * for pty sysctl function. 1844 */ 1845 static int 1846 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 1847 { 1848 int error = 0; 1849 int oldmax = 0, newmax = 0; 1850 1851 /* get current value of maxptys */ 1852 oldmax = pty_maxptys(0, 0); 1853 1854 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1855 1856 if (!error && newp) { 1857 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1858 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1859 1860 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1861 return (EINVAL); 1862 1863 } 1864 1865 return (error); 1866 } 1867 #endif /* NPTY > 0 */ 1868
Indexes created Tue Sep 30 07:10:03 GMT 2025