kern_sysctl.c revision 1.86.2.6
1 /* $NetBSD: kern_sysctl.c,v 1.86.2.6 2001/08/24 00:11:32 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 return (error); 360 case KERN_MAXPROC: 361 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 362 case KERN_MAXFILES: 363 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 364 case KERN_ARGMAX: 365 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 366 case KERN_SECURELVL: 367 level = securelevel; 368 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 369 newp == NULL) 370 return (error); 371 if (level < securelevel && p->p_pid != 1) 372 return (EPERM); 373 securelevel = level; 374 return (0); 375 case KERN_HOSTNAME: 376 error = sysctl_string(oldp, oldlenp, newp, newlen, 377 hostname, sizeof(hostname)); 378 if (newp && !error) 379 hostnamelen = newlen; 380 return (error); 381 case KERN_DOMAINNAME: 382 error = sysctl_string(oldp, oldlenp, newp, newlen, 383 domainname, sizeof(domainname)); 384 if (newp && !error) 385 domainnamelen = newlen; 386 return (error); 387 case KERN_HOSTID: 388 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 389 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 390 hostid = inthostid; 391 return (error); 392 case KERN_CLOCKRATE: 393 return (sysctl_clockrate(oldp, oldlenp)); 394 case KERN_BOOTTIME: 395 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 396 sizeof(struct timeval))); 397 case KERN_VNODE: 398 return (sysctl_vnode(oldp, oldlenp, p)); 399 case KERN_PROC: 400 case KERN_PROC2: 401 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 402 case KERN_PROC_ARGS: 403 return (sysctl_procargs(name + 1, namelen - 1, 404 oldp, oldlenp, p)); 405 case KERN_FILE: 406 return (sysctl_file(oldp, oldlenp)); 407 #ifdef GPROF 408 case KERN_PROF: 409 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 410 newp, newlen)); 411 #endif 412 case KERN_POSIX1: 413 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 414 case KERN_NGROUPS: 415 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 416 case KERN_JOB_CONTROL: 417 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 418 case KERN_SAVED_IDS: 419 #ifdef _POSIX_SAVED_IDS 420 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 421 #else 422 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 423 #endif 424 case KERN_MAXPARTITIONS: 425 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 426 case KERN_RAWPARTITION: 427 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 428 #ifdef NTP 429 case KERN_NTPTIME: 430 return (sysctl_ntptime(oldp, oldlenp)); 431 #endif 432 case KERN_AUTONICETIME: 433 old_autonicetime = autonicetime; 434 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 435 if (autonicetime < 0) 436 autonicetime = old_autonicetime; 437 return (error); 438 case KERN_AUTONICEVAL: 439 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 440 if (autoniceval < PRIO_MIN) 441 autoniceval = PRIO_MIN; 442 if (autoniceval > PRIO_MAX) 443 autoniceval = PRIO_MAX; 444 return (error); 445 case KERN_RTC_OFFSET: 446 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 447 case KERN_ROOT_DEVICE: 448 return (sysctl_rdstring(oldp, oldlenp, newp, 449 root_device->dv_xname)); 450 case KERN_MSGBUFSIZE: 451 /* 452 * deal with cases where the message buffer has 453 * become corrupted. 454 */ 455 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 456 msgbufenabled = 0; 457 return (ENXIO); 458 } 459 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 460 case KERN_FSYNC: 461 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 462 case KERN_SYSVMSG: 463 #ifdef SYSVMSG 464 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 465 #else 466 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 467 #endif 468 case KERN_SYSVSEM: 469 #ifdef SYSVSEM 470 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 471 #else 472 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 473 #endif 474 case KERN_SYSVSHM: 475 #ifdef SYSVSHM 476 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 477 #else 478 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 479 #endif 480 case KERN_DEFCORENAME: 481 if (newp && newlen < 1) 482 return (EINVAL); 483 error = sysctl_string(oldp, oldlenp, newp, newlen, 484 defcorename, sizeof(defcorename)); 485 if (newp && !error) 486 defcorenamelen = newlen; 487 return (error); 488 case KERN_SYNCHRONIZED_IO: 489 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 490 case KERN_IOV_MAX: 491 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 492 case KERN_MBUF: 493 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 494 newp, newlen)); 495 case KERN_MAPPED_FILES: 496 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 497 case KERN_MEMLOCK: 498 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 499 case KERN_MEMLOCK_RANGE: 500 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 501 case KERN_MEMORY_PROTECTION: 502 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 503 case KERN_LOGIN_NAME_MAX: 504 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 505 case KERN_LOGSIGEXIT: 506 return (sysctl_int(oldp, oldlenp, newp, newlen, 507 &kern_logsigexit)); 508 case KERN_FSCALE: 509 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 510 case KERN_CCPU: 511 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 512 case KERN_CP_TIME: 513 #ifndef MULTIPROCESSOR 514 return (sysctl_rdstruct(oldp, oldlenp, newp, 515 curcpu()->ci_schedstate.spc_cp_time, 516 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 517 #else 518 return (sysctl_docptime(oldp, oldlenp, newp)); 519 #endif 520 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 521 case KERN_SYSVIPC_INFO: 522 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 523 #endif 524 case KERN_MSGBUF: 525 return (sysctl_msgbuf(oldp, oldlenp)); 526 case KERN_CONSDEV: 527 if (cn_tab != NULL) 528 consdev = cn_tab->cn_dev; 529 else 530 consdev = NODEV; 531 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 532 sizeof consdev)); 533 #if NPTY > 0 534 case KERN_MAXPTYS: 535 return sysctl_pty(oldp, oldlenp, newp, newlen); 536 #endif 537 #ifdef NEW_PIPE 538 case KERN_PIPE: 539 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 540 newp, newlen)); 541 #endif 542 case KERN_MAXPHYS: 543 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 544 case KERN_SBMAX: 545 { 546 int new_sbmax = sb_max; 547 548 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 549 if (error == 0) { 550 if (new_sbmax < (16 * 1024)) /* sanity */ 551 return (EINVAL); 552 sb_max = new_sbmax; 553 } 554 return (error); 555 } 556 default: 557 return (EOPNOTSUPP); 558 } 559 /* NOTREACHED */ 560 } 561 562 /* 563 * hardware related system variables. 564 */ 565 int 566 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 567 void *newp, size_t newlen, struct proc *p) 568 { 569 570 /* all sysctl names at this level are terminal */ 571 if (namelen != 1) 572 return (ENOTDIR); /* overloaded */ 573 574 switch (name[0]) { 575 case HW_MACHINE: 576 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 577 case HW_MACHINE_ARCH: 578 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 579 case HW_MODEL: 580 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 581 case HW_NCPU: 582 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 583 case HW_BYTEORDER: 584 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 585 case HW_PHYSMEM: 586 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 587 case HW_USERMEM: 588 return (sysctl_rdint(oldp, oldlenp, newp, 589 ctob(physmem - uvmexp.wired))); 590 case HW_PAGESIZE: 591 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 592 case HW_ALIGNBYTES: 593 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 594 case HW_CNMAGIC: { 595 char magic[CNS_LEN]; 596 int error; 597 598 if (oldp) 599 cn_get_magic(magic, CNS_LEN); 600 error = sysctl_string(oldp, oldlenp, newp, newlen, 601 magic, sizeof(magic)); 602 if (newp && !error) { 603 error = cn_set_magic(magic); 604 } 605 return (error); 606 } 607 default: 608 return (EOPNOTSUPP); 609 } 610 /* NOTREACHED */ 611 } 612 613 #ifdef DEBUG 614 /* 615 * Debugging related system variables. 616 */ 617 struct ctldebug debug0, debug1, debug2, debug3, debug4; 618 struct ctldebug debug5, debug6, debug7, debug8, debug9; 619 struct ctldebug debug10, debug11, debug12, debug13, debug14; 620 struct ctldebug debug15, debug16, debug17, debug18, debug19; 621 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 622 &debug0, &debug1, &debug2, &debug3, &debug4, 623 &debug5, &debug6, &debug7, &debug8, &debug9, 624 &debug10, &debug11, &debug12, &debug13, &debug14, 625 &debug15, &debug16, &debug17, &debug18, &debug19, 626 }; 627 628 int 629 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 630 void *newp, size_t newlen, struct proc *p) 631 { 632 struct ctldebug *cdp; 633 634 /* all sysctl names at this level are name and field */ 635 if (namelen != 2) 636 return (ENOTDIR); /* overloaded */ 637 cdp = debugvars[name[0]]; 638 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 639 return (EOPNOTSUPP); 640 switch (name[1]) { 641 case CTL_DEBUG_NAME: 642 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 643 case CTL_DEBUG_VALUE: 644 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 645 default: 646 return (EOPNOTSUPP); 647 } 648 /* NOTREACHED */ 649 } 650 #endif /* DEBUG */ 651 652 int 653 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 654 void *newp, size_t newlen, struct proc *p) 655 { 656 struct proc *ptmp = NULL; 657 const struct proclist_desc *pd; 658 int error = 0; 659 struct rlimit alim; 660 struct plimit *newplim; 661 char *tmps = NULL; 662 int i, curlen, len; 663 664 if (namelen < 2) 665 return EINVAL; 666 667 if (name[0] == PROC_CURPROC) { 668 ptmp = p; 669 } else { 670 proclist_lock_read(); 671 for (pd = proclists; pd->pd_list != NULL; pd++) { 672 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 673 ptmp = LIST_NEXT(ptmp, p_list)) { 674 /* Skip embryonic processes. */ 675 if (ptmp->p_stat == SIDL) 676 continue; 677 if (ptmp->p_pid == (pid_t)name[0]) 678 break; 679 } 680 if (ptmp != NULL) 681 break; 682 } 683 proclist_unlock_read(); 684 if (ptmp == NULL) 685 return(ESRCH); 686 if (p->p_ucred->cr_uid != 0) { 687 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 688 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 689 return EPERM; 690 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 691 return EPERM; /* sgid proc */ 692 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 693 if (p->p_ucred->cr_groups[i] == 694 ptmp->p_cred->p_rgid) 695 break; 696 } 697 if (i == p->p_ucred->cr_ngroups) 698 return EPERM; 699 } 700 } 701 if (name[1] == PROC_PID_CORENAME) { 702 if (namelen != 2) 703 return EINVAL; 704 /* 705 * Can't use sysctl_string() here because we may malloc a new 706 * area during the process, so we have to do it by hand. 707 */ 708 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 709 if (oldlenp && *oldlenp < curlen) { 710 if (!oldp) 711 *oldlenp = curlen; 712 return (ENOMEM); 713 } 714 if (newp) { 715 if (securelevel > 2) 716 return EPERM; 717 if (newlen > MAXPATHLEN) 718 return ENAMETOOLONG; 719 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 720 if (tmps == NULL) 721 return ENOMEM; 722 error = copyin(newp, tmps, newlen + 1); 723 tmps[newlen] = '\0'; 724 if (error) 725 goto cleanup; 726 /* Enforce to be either 'core' for end with '.core' */ 727 if (newlen < 4) { /* c.o.r.e */ 728 error = EINVAL; 729 goto cleanup; 730 } 731 len = newlen - 4; 732 if (len > 0) { 733 if (tmps[len - 1] != '.' && 734 tmps[len - 1] != '/') { 735 error = EINVAL; 736 goto cleanup; 737 } 738 } 739 if (strcmp(&tmps[len], "core") != 0) { 740 error = EINVAL; 741 goto cleanup; 742 } 743 } 744 if (oldp && oldlenp) { 745 *oldlenp = curlen; 746 error = copyout(ptmp->p_limit->pl_corename, oldp, 747 curlen); 748 } 749 if (newp && error == 0) { 750 /* if the 2 strings are identical, don't limcopy() */ 751 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 752 error = 0; 753 goto cleanup; 754 } 755 if (ptmp->p_limit->p_refcnt > 1 && 756 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 757 newplim = limcopy(ptmp->p_limit); 758 limfree(ptmp->p_limit); 759 ptmp->p_limit = newplim; 760 } else if (ptmp->p_limit->pl_corename != defcorename) { 761 free(ptmp->p_limit->pl_corename, M_TEMP); 762 } 763 ptmp->p_limit->pl_corename = tmps; 764 return (0); 765 } 766 cleanup: 767 if (tmps) 768 free(tmps, M_TEMP); 769 return (error); 770 } 771 if (name[1] == PROC_PID_LIMIT) { 772 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 773 return EINVAL; 774 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 775 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 776 error = sysctl_quad(oldp, oldlenp, newp, newlen, 777 &alim.rlim_max); 778 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 779 error = sysctl_quad(oldp, oldlenp, newp, newlen, 780 &alim.rlim_cur); 781 else 782 error = EINVAL; 783 784 if (error) 785 return error; 786 787 if (newp) 788 error = dosetrlimit(ptmp, p->p_cred, 789 name[2] - 1, &alim); 790 return error; 791 } 792 return (EINVAL); 793 } 794 795 /* 796 * Convenience macros. 797 */ 798 799 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 800 if (oldlenp) { \ 801 if (!oldp) \ 802 *oldlenp = len; \ 803 else { \ 804 if (*oldlenp < len) \ 805 return(ENOMEM); \ 806 *oldlenp = len; \ 807 error = copyout((caddr_t)valp, oldp, len); \ 808 } \ 809 } 810 811 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 812 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 813 814 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 815 if (newp && newlen != len) \ 816 return (EINVAL); 817 818 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 819 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 820 821 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 822 if (error == 0 && newp) \ 823 error = copyin(newp, valp, len); 824 825 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 826 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 827 828 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 829 if (oldlenp) { \ 830 len = strlen(str) + 1; \ 831 if (!oldp) \ 832 *oldlenp = len; \ 833 else { \ 834 if (*oldlenp < len) { \ 835 err2 = ENOMEM; \ 836 len = *oldlenp; \ 837 } else \ 838 *oldlenp = len; \ 839 error = copyout(str, oldp, len);\ 840 if (error == 0) \ 841 error = err2; \ 842 } \ 843 } 844 845 /* 846 * Validate parameters and get old / set new parameters 847 * for an integer-valued sysctl function. 848 */ 849 int 850 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 851 { 852 int error = 0; 853 854 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 855 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 856 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 857 858 return (error); 859 } 860 861 862 /* 863 * As above, but read-only. 864 */ 865 int 866 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 867 { 868 int error = 0; 869 870 if (newp) 871 return (EPERM); 872 873 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 874 875 return (error); 876 } 877 878 /* 879 * Validate parameters and get old / set new parameters 880 * for an quad-valued sysctl function. 881 */ 882 int 883 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 884 quad_t *valp) 885 { 886 int error = 0; 887 888 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 889 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 890 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 891 892 return (error); 893 } 894 895 /* 896 * As above, but read-only. 897 */ 898 int 899 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 900 { 901 int error = 0; 902 903 if (newp) 904 return (EPERM); 905 906 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 907 908 return (error); 909 } 910 911 /* 912 * Validate parameters and get old / set new parameters 913 * for a string-valued sysctl function. 914 */ 915 int 916 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 917 int maxlen) 918 { 919 int len, error = 0, err2 = 0; 920 921 if (newp && newlen >= maxlen) 922 return (EINVAL); 923 924 SYSCTL_STRING_CORE(oldp, oldlenp, str); 925 926 if (error == 0 && newp) { 927 error = copyin(newp, str, newlen); 928 str[newlen] = 0; 929 } 930 return (error); 931 } 932 933 /* 934 * As above, but read-only. 935 */ 936 int 937 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 938 { 939 int len, error = 0, err2 = 0; 940 941 if (newp) 942 return (EPERM); 943 944 SYSCTL_STRING_CORE(oldp, oldlenp, str); 945 946 return (error); 947 } 948 949 /* 950 * Validate parameters and get old / set new parameters 951 * for a structure oriented sysctl function. 952 */ 953 int 954 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 955 int len) 956 { 957 int error = 0; 958 959 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 960 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 961 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 962 963 return (error); 964 } 965 966 /* 967 * Validate parameters and get old parameters 968 * for a structure oriented sysctl function. 969 */ 970 int 971 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 972 int len) 973 { 974 int error = 0; 975 976 if (newp) 977 return (EPERM); 978 979 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 980 981 return (error); 982 } 983 984 /* 985 * As above, but can return a truncated result. 986 */ 987 int 988 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 989 int len) 990 { 991 int error = 0; 992 993 if (newp) 994 return (EPERM); 995 996 len = min(*oldlenp, len); 997 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 998 999 return (error); 1000 } 1001 1002 /* 1003 * Get file structures. 1004 */ 1005 static int 1006 sysctl_file(void *vwhere, size_t *sizep) 1007 { 1008 int buflen, error; 1009 struct file *fp; 1010 char *start, *where; 1011 1012 start = where = vwhere; 1013 buflen = *sizep; 1014 if (where == NULL) { 1015 /* 1016 * overestimate by 10 files 1017 */ 1018 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1019 return (0); 1020 } 1021 1022 /* 1023 * first copyout filehead 1024 */ 1025 if (buflen < sizeof(filehead)) { 1026 *sizep = 0; 1027 return (0); 1028 } 1029 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 1030 if (error) 1031 return (error); 1032 buflen -= sizeof(filehead); 1033 where += sizeof(filehead); 1034 1035 /* 1036 * followed by an array of file structures 1037 */ 1038 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 1039 if (buflen < sizeof(struct file)) { 1040 *sizep = where - start; 1041 return (ENOMEM); 1042 } 1043 error = copyout((caddr_t)fp, where, sizeof(struct file)); 1044 if (error) 1045 return (error); 1046 buflen -= sizeof(struct file); 1047 where += sizeof(struct file); 1048 } 1049 *sizep = where - start; 1050 return (0); 1051 } 1052 1053 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1054 #define FILL_PERM(src, dst) do { \ 1055 (dst)._key = (src)._key; \ 1056 (dst).uid = (src).uid; \ 1057 (dst).gid = (src).gid; \ 1058 (dst).cuid = (src).cuid; \ 1059 (dst).cgid = (src).cgid; \ 1060 (dst).mode = (src).mode; \ 1061 (dst)._seq = (src)._seq; \ 1062 } while (0); 1063 #define FILL_MSG(src, dst) do { \ 1064 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1065 (dst).msg_qnum = (src).msg_qnum; \ 1066 (dst).msg_qbytes = (src).msg_qbytes; \ 1067 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1068 (dst).msg_lspid = (src).msg_lspid; \ 1069 (dst).msg_lrpid = (src).msg_lrpid; \ 1070 (dst).msg_stime = (src).msg_stime; \ 1071 (dst).msg_rtime = (src).msg_rtime; \ 1072 (dst).msg_ctime = (src).msg_ctime; \ 1073 } while (0) 1074 #define FILL_SEM(src, dst) do { \ 1075 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1076 (dst).sem_nsems = (src).sem_nsems; \ 1077 (dst).sem_otime = (src).sem_otime; \ 1078 (dst).sem_ctime = (src).sem_ctime; \ 1079 } while (0) 1080 #define FILL_SHM(src, dst) do { \ 1081 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1082 (dst).shm_segsz = (src).shm_segsz; \ 1083 (dst).shm_lpid = (src).shm_lpid; \ 1084 (dst).shm_cpid = (src).shm_cpid; \ 1085 (dst).shm_atime = (src).shm_atime; \ 1086 (dst).shm_dtime = (src).shm_dtime; \ 1087 (dst).shm_ctime = (src).shm_ctime; \ 1088 (dst).shm_nattch = (src).shm_nattch; \ 1089 } while (0) 1090 1091 static int 1092 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1093 { 1094 #ifdef SYSVMSG 1095 struct msg_sysctl_info *msgsi; 1096 #endif 1097 #ifdef SYSVSEM 1098 struct sem_sysctl_info *semsi; 1099 #endif 1100 #ifdef SYSVSHM 1101 struct shm_sysctl_info *shmsi; 1102 #endif 1103 size_t infosize, dssize, tsize, buflen; 1104 void *buf = NULL, *buf2; 1105 char *start; 1106 int32_t nds; 1107 int i, error, ret; 1108 1109 if (namelen != 1) 1110 return (EINVAL); 1111 1112 start = where; 1113 buflen = *sizep; 1114 1115 switch (*name) { 1116 case KERN_SYSVIPC_MSG_INFO: 1117 #ifdef SYSVMSG 1118 infosize = sizeof(msgsi->msginfo); 1119 nds = msginfo.msgmni; 1120 dssize = sizeof(msgsi->msgids[0]); 1121 break; 1122 #else 1123 return (EINVAL); 1124 #endif 1125 case KERN_SYSVIPC_SEM_INFO: 1126 #ifdef SYSVSEM 1127 infosize = sizeof(semsi->seminfo); 1128 nds = seminfo.semmni; 1129 dssize = sizeof(semsi->semids[0]); 1130 break; 1131 #else 1132 return (EINVAL); 1133 #endif 1134 case KERN_SYSVIPC_SHM_INFO: 1135 #ifdef SYSVSHM 1136 infosize = sizeof(shmsi->shminfo); 1137 nds = shminfo.shmmni; 1138 dssize = sizeof(shmsi->shmids[0]); 1139 break; 1140 #else 1141 return (EINVAL); 1142 #endif 1143 default: 1144 return (EINVAL); 1145 } 1146 /* 1147 * Round infosize to 64 bit boundary if requesting more than just 1148 * the info structure or getting the total data size. 1149 */ 1150 if (where == NULL || *sizep > infosize) 1151 infosize = ((infosize + 7) / 8) * 8; 1152 tsize = infosize + nds * dssize; 1153 1154 /* Return just the total size required. */ 1155 if (where == NULL) { 1156 *sizep = tsize; 1157 return (0); 1158 } 1159 1160 /* Not enough room for even the info struct. */ 1161 if (buflen < infosize) { 1162 *sizep = 0; 1163 return (ENOMEM); 1164 } 1165 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1166 memset(buf, 0, min(tsize, buflen)); 1167 1168 switch (*name) { 1169 #ifdef SYSVMSG 1170 case KERN_SYSVIPC_MSG_INFO: 1171 msgsi = (struct msg_sysctl_info *)buf; 1172 buf2 = &msgsi->msgids[0]; 1173 msgsi->msginfo = msginfo; 1174 break; 1175 #endif 1176 #ifdef SYSVSEM 1177 case KERN_SYSVIPC_SEM_INFO: 1178 semsi = (struct sem_sysctl_info *)buf; 1179 buf2 = &semsi->semids[0]; 1180 semsi->seminfo = seminfo; 1181 break; 1182 #endif 1183 #ifdef SYSVSHM 1184 case KERN_SYSVIPC_SHM_INFO: 1185 shmsi = (struct shm_sysctl_info *)buf; 1186 buf2 = &shmsi->shmids[0]; 1187 shmsi->shminfo = shminfo; 1188 break; 1189 #endif 1190 } 1191 buflen -= infosize; 1192 1193 ret = 0; 1194 if (buflen > 0) { 1195 /* Fill in the IPC data structures. */ 1196 for (i = 0; i < nds; i++) { 1197 if (buflen < dssize) { 1198 ret = ENOMEM; 1199 break; 1200 } 1201 switch (*name) { 1202 #ifdef SYSVMSG 1203 case KERN_SYSVIPC_MSG_INFO: 1204 FILL_MSG(msqids[i], msgsi->msgids[i]); 1205 break; 1206 #endif 1207 #ifdef SYSVSEM 1208 case KERN_SYSVIPC_SEM_INFO: 1209 FILL_SEM(sema[i], semsi->semids[i]); 1210 break; 1211 #endif 1212 #ifdef SYSVSHM 1213 case KERN_SYSVIPC_SHM_INFO: 1214 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1215 break; 1216 #endif 1217 } 1218 buflen -= dssize; 1219 } 1220 } 1221 *sizep -= buflen; 1222 error = copyout(buf, start, *sizep); 1223 /* If copyout succeeded, use return code set earlier. */ 1224 if (error == 0) 1225 error = ret; 1226 if (buf) 1227 free(buf, M_TEMP); 1228 return (error); 1229 } 1230 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1231 1232 static int 1233 sysctl_msgbuf(void *vwhere, size_t *sizep) 1234 { 1235 char *where = vwhere; 1236 size_t len, maxlen = *sizep; 1237 long beg, end; 1238 int error; 1239 1240 /* 1241 * deal with cases where the message buffer has 1242 * become corrupted. 1243 */ 1244 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1245 msgbufenabled = 0; 1246 return (ENXIO); 1247 } 1248 1249 if (where == NULL) { 1250 /* always return full buffer size */ 1251 *sizep = msgbufp->msg_bufs; 1252 return (0); 1253 } 1254 1255 error = 0; 1256 maxlen = min(msgbufp->msg_bufs, maxlen); 1257 1258 /* 1259 * First, copy from the write pointer to the end of 1260 * message buffer. 1261 */ 1262 beg = msgbufp->msg_bufx; 1263 end = msgbufp->msg_bufs; 1264 while (maxlen > 0) { 1265 len = min(end - beg, maxlen); 1266 if (len == 0) 1267 break; 1268 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1269 if (error) 1270 break; 1271 where += len; 1272 maxlen -= len; 1273 1274 /* 1275 * ... then, copy from the beginning of message buffer to 1276 * the write pointer. 1277 */ 1278 beg = 0; 1279 end = msgbufp->msg_bufx; 1280 } 1281 return (error); 1282 } 1283 1284 /* 1285 * try over estimating by 5 procs 1286 */ 1287 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1288 1289 static int 1290 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1291 { 1292 struct eproc eproc; 1293 struct kinfo_proc2 kproc2; 1294 struct kinfo_proc *dp; 1295 struct proc *p; 1296 const struct proclist_desc *pd; 1297 char *where, *dp2; 1298 int type, op, arg, elem_size, elem_count; 1299 int buflen, needed, error; 1300 1301 dp = vwhere; 1302 dp2 = where = vwhere; 1303 buflen = where != NULL ? *sizep : 0; 1304 error = needed = 0; 1305 type = name[0]; 1306 1307 if (type == KERN_PROC) { 1308 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1309 return (EINVAL); 1310 op = name[1]; 1311 if (op != KERN_PROC_ALL) 1312 arg = name[2]; 1313 } else { 1314 if (namelen != 5) 1315 return (EINVAL); 1316 op = name[1]; 1317 arg = name[2]; 1318 elem_size = name[3]; 1319 elem_count = name[4]; 1320 } 1321 1322 proclist_lock_read(); 1323 1324 pd = proclists; 1325 again: 1326 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1327 /* 1328 * Skip embryonic processes. 1329 */ 1330 if (p->p_stat == SIDL) 1331 continue; 1332 /* 1333 * TODO - make more efficient (see notes below). 1334 * do by session. 1335 */ 1336 switch (op) { 1337 1338 case KERN_PROC_PID: 1339 /* could do this with just a lookup */ 1340 if (p->p_pid != (pid_t)arg) 1341 continue; 1342 break; 1343 1344 case KERN_PROC_PGRP: 1345 /* could do this by traversing pgrp */ 1346 if (p->p_pgrp->pg_id != (pid_t)arg) 1347 continue; 1348 break; 1349 1350 case KERN_PROC_SESSION: 1351 if (p->p_session->s_sid != (pid_t)arg) 1352 continue; 1353 break; 1354 1355 case KERN_PROC_TTY: 1356 if (arg == KERN_PROC_TTY_REVOKE) { 1357 if ((p->p_flag & P_CONTROLT) == 0 || 1358 p->p_session->s_ttyp == NULL || 1359 p->p_session->s_ttyvp != NULL) 1360 continue; 1361 } else if ((p->p_flag & P_CONTROLT) == 0 || 1362 p->p_session->s_ttyp == NULL) { 1363 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1364 continue; 1365 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1366 continue; 1367 break; 1368 1369 case KERN_PROC_UID: 1370 if (p->p_ucred->cr_uid != (uid_t)arg) 1371 continue; 1372 break; 1373 1374 case KERN_PROC_RUID: 1375 if (p->p_cred->p_ruid != (uid_t)arg) 1376 continue; 1377 break; 1378 1379 case KERN_PROC_GID: 1380 if (p->p_ucred->cr_gid != (uid_t)arg) 1381 continue; 1382 break; 1383 1384 case KERN_PROC_RGID: 1385 if (p->p_cred->p_rgid != (uid_t)arg) 1386 continue; 1387 break; 1388 1389 case KERN_PROC_ALL: 1390 /* allow everything */ 1391 break; 1392 1393 default: 1394 error = EINVAL; 1395 goto cleanup; 1396 } 1397 if (type == KERN_PROC) { 1398 if (buflen >= sizeof(struct kinfo_proc)) { 1399 fill_eproc(p, &eproc); 1400 error = copyout((caddr_t)p, &dp->kp_proc, 1401 sizeof(struct proc)); 1402 if (error) 1403 goto cleanup; 1404 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1405 sizeof(eproc)); 1406 if (error) 1407 goto cleanup; 1408 dp++; 1409 buflen -= sizeof(struct kinfo_proc); 1410 } 1411 needed += sizeof(struct kinfo_proc); 1412 } else { /* KERN_PROC2 */ 1413 if (buflen >= elem_size && elem_count > 0) { 1414 fill_kproc2(p, &kproc2); 1415 /* 1416 * Copy out elem_size, but not larger than 1417 * the size of a struct kinfo_proc2. 1418 */ 1419 error = copyout(&kproc2, dp2, 1420 min(sizeof(kproc2), elem_size)); 1421 if (error) 1422 goto cleanup; 1423 dp2 += elem_size; 1424 buflen -= elem_size; 1425 elem_count--; 1426 } 1427 needed += elem_size; 1428 } 1429 } 1430 pd++; 1431 if (pd->pd_list != NULL) 1432 goto again; 1433 proclist_unlock_read(); 1434 1435 if (where != NULL) { 1436 if (type == KERN_PROC) 1437 *sizep = (caddr_t)dp - where; 1438 else 1439 *sizep = dp2 - where; 1440 if (needed > *sizep) 1441 return (ENOMEM); 1442 } else { 1443 needed += KERN_PROCSLOP; 1444 *sizep = needed; 1445 } 1446 return (0); 1447 cleanup: 1448 proclist_unlock_read(); 1449 return (error); 1450 } 1451 1452 /* 1453 * Fill in an eproc structure for the specified process. 1454 */ 1455 void 1456 fill_eproc(struct proc *p, struct eproc *ep) 1457 { 1458 struct tty *tp; 1459 struct lwp *l; 1460 1461 ep->e_paddr = p; 1462 ep->e_sess = p->p_session; 1463 ep->e_pcred = *p->p_cred; 1464 ep->e_ucred = *p->p_ucred; 1465 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1466 ep->e_vm.vm_rssize = 0; 1467 ep->e_vm.vm_tsize = 0; 1468 ep->e_vm.vm_dsize = 0; 1469 ep->e_vm.vm_ssize = 0; 1470 /* ep->e_vm.vm_pmap = XXX; */ 1471 } else { 1472 struct vmspace *vm = p->p_vmspace; 1473 1474 ep->e_vm.vm_rssize = vm_resident_count(vm); 1475 ep->e_vm.vm_tsize = vm->vm_tsize; 1476 ep->e_vm.vm_dsize = vm->vm_dsize; 1477 ep->e_vm.vm_ssize = vm->vm_ssize; 1478 1479 /* Pick a "representative" LWP */ 1480 l = proc_representative_lwp(p); 1481 1482 if (l->l_wmesg) 1483 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1484 } 1485 if (p->p_pptr) 1486 ep->e_ppid = p->p_pptr->p_pid; 1487 else 1488 ep->e_ppid = 0; 1489 ep->e_pgid = p->p_pgrp->pg_id; 1490 ep->e_sid = ep->e_sess->s_sid; 1491 ep->e_jobc = p->p_pgrp->pg_jobc; 1492 if ((p->p_flag & P_CONTROLT) && 1493 (tp = ep->e_sess->s_ttyp)) { 1494 ep->e_tdev = tp->t_dev; 1495 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1496 ep->e_tsess = tp->t_session; 1497 } else 1498 ep->e_tdev = NODEV; 1499 1500 ep->e_xsize = ep->e_xrssize = 0; 1501 ep->e_xccount = ep->e_xswrss = 0; 1502 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1503 if (SESS_LEADER(p)) 1504 ep->e_flag |= EPROC_SLEADER; 1505 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1506 } 1507 1508 /* 1509 * Fill in an eproc structure for the specified process. 1510 */ 1511 static void 1512 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1513 { 1514 struct tty *tp; 1515 struct lwp *l; 1516 memset(ki, 0, sizeof(*ki)); 1517 1518 /* XXX NJWLWP 1519 * These are likely not what the caller was looking for. 1520 * The perils of playing with the kernel data structures... 1521 */ 1522 ki->p_paddr = PTRTOINT64(p); 1523 ki->p_fd = PTRTOINT64(p->p_fd); 1524 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1525 ki->p_stats = PTRTOINT64(p->p_stats); 1526 ki->p_limit = PTRTOINT64(p->p_limit); 1527 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1528 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1529 ki->p_sess = PTRTOINT64(p->p_session); 1530 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1531 ki->p_ru = PTRTOINT64(p->p_ru); 1532 1533 ki->p_eflag = 0; 1534 ki->p_exitsig = p->p_exitsig; 1535 ki->p_flag = p->p_flag; 1536 1537 ki->p_pid = p->p_pid; 1538 if (p->p_pptr) 1539 ki->p_ppid = p->p_pptr->p_pid; 1540 else 1541 ki->p_ppid = 0; 1542 ki->p_sid = p->p_session->s_sid; 1543 ki->p__pgid = p->p_pgrp->pg_id; 1544 1545 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1546 1547 ki->p_uid = p->p_ucred->cr_uid; 1548 ki->p_ruid = p->p_cred->p_ruid; 1549 ki->p_gid = p->p_ucred->cr_gid; 1550 ki->p_rgid = p->p_cred->p_rgid; 1551 1552 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1553 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1554 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1555 1556 ki->p_jobc = p->p_pgrp->pg_jobc; 1557 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1558 ki->p_tdev = tp->t_dev; 1559 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1560 ki->p_tsess = PTRTOINT64(tp->t_session); 1561 } else { 1562 ki->p_tdev = NODEV; 1563 } 1564 1565 ki->p_estcpu = p->p_estcpu; 1566 ki->p_rtime_sec = p->p_rtime.tv_sec; 1567 ki->p_rtime_usec = p->p_rtime.tv_usec; 1568 ki->p_cpticks = p->p_cpticks; 1569 ki->p_pctcpu = p->p_pctcpu; 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 1579 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1580 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1581 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1582 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1583 1584 ki->p_stat = p->p_stat; 1585 ki->p_nice = p->p_nice; 1586 1587 ki->p_xstat = p->p_xstat; 1588 ki->p_acflag = p->p_acflag; 1589 1590 strncpy(ki->p_comm, p->p_comm, 1591 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1592 1593 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1594 1595 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1596 ki->p_vm_rssize = 0; 1597 ki->p_vm_tsize = 0; 1598 ki->p_vm_dsize = 0; 1599 ki->p_vm_ssize = 0; 1600 } else { 1601 struct vmspace *vm = p->p_vmspace; 1602 1603 ki->p_vm_rssize = vm_resident_count(vm); 1604 ki->p_vm_tsize = vm->vm_tsize; 1605 ki->p_vm_dsize = vm->vm_dsize; 1606 ki->p_vm_ssize = vm->vm_ssize; 1607 1608 /* Pick a "representative" LWP */ 1609 l = proc_representative_lwp(p); 1610 ki->p_forw = PTRTOINT64(l->l_forw); 1611 ki->p_back = PTRTOINT64(l->l_back); 1612 ki->p_addr = PTRTOINT64(l->l_addr); 1613 ki->p_swtime = l->l_swtime; 1614 ki->p_slptime = l->l_slptime; 1615 if (l->l_stat == LSONPROC) { 1616 KDASSERT(l->l_cpu != NULL); 1617 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1618 } else 1619 ki->p_schedflags = 0; 1620 ki->p_holdcnt = l->l_holdcnt; 1621 ki->p_priority = l->l_priority; 1622 ki->p_usrpri = l->l_usrpri; 1623 if (l->l_wmesg) 1624 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1625 ki->p_wchan = PTRTOINT64(l->l_wchan); 1626 1627 } 1628 1629 if (p->p_session->s_ttyvp) 1630 ki->p_eflag |= EPROC_CTTY; 1631 if (SESS_LEADER(p)) 1632 ki->p_eflag |= EPROC_SLEADER; 1633 1634 /* XXX Is this double check necessary? */ 1635 if (P_ZOMBIE(p)) { 1636 ki->p_uvalid = 0; 1637 } else { 1638 ki->p_uvalid = 1; 1639 1640 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1641 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1642 1643 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1644 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1645 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1646 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1647 1648 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1649 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1650 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1651 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1652 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1653 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1654 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1655 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1656 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1657 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1658 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1659 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1660 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1661 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1662 1663 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1664 p->p_stats->p_cru.ru_stime.tv_sec; 1665 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1666 p->p_stats->p_cru.ru_stime.tv_usec; 1667 } 1668 #ifdef MULTIPROCESSOR 1669 if (p->p_cpu != NULL) 1670 ki->p_cpuid = p->p_cpu->ci_cpuid; 1671 else 1672 #endif 1673 ki->p_cpuid = KI_NOCPU; 1674 1675 } 1676 1677 1678 /* 1679 * Pick a LWP to represent the process for those operations which 1680 * want information about a "process" that is actually associated 1681 * with a LWP. 1682 */ 1683 static struct lwp *proc_representative_lwp(p) 1684 struct proc *p; 1685 { 1686 struct lwp *l = NULL; 1687 1688 /* Trivial case: only one LWP */ 1689 if (p->p_nrlwps == 1) 1690 return (LIST_FIRST(&p->p_lwps)); 1691 1692 switch (p->p_stat) { 1693 case SSTOP: 1694 /* Pick the first stopped LWP */ 1695 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1696 if (l->l_stat == LSSTOP) 1697 return (l); 1698 } 1699 /* NOTREACHED */ 1700 break; 1701 case SACTIVE: 1702 /* Pick the first live LWP */ 1703 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1704 if (l->l_stat == LSRUN || 1705 l->l_stat == LSSLEEP || 1706 l->l_stat == LSONPROC || 1707 l->l_stat == LSSUSPENDED) 1708 return (l); 1709 } 1710 break; 1711 case SDEAD: 1712 case SZOMB: 1713 /* Doesn't really matter... */ 1714 l = LIST_FIRST(&p->p_lwps); 1715 break; 1716 #ifdef DIAGNOSTIC 1717 case SIDL: 1718 /* We have more than one LWP and we're in SIDL? 1719 * How'd that happen? 1720 */ 1721 panic("Too many LWPs (%d) in SIDL process %d (%s)", 1722 p->p_nrlwps, p->p_pid, p->p_comm); 1723 default: 1724 panic("Process %d (%s) in unknown state %d", 1725 p->p_pid, p->p_comm, p->p_stat); 1726 #endif 1727 } 1728 1729 panic("proc_representative_lwp: couldn't find a lwp for process" 1730 " %d (%s)", p->p_pid, p->p_comm); 1731 /* NOTREACHED */ 1732 return NULL; 1733 } 1734 1735 1736 int 1737 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 1738 struct proc *up) 1739 { 1740 struct ps_strings pss; 1741 struct proc *p; 1742 size_t len, upper_bound, xlen; 1743 struct uio auio; 1744 struct iovec aiov; 1745 vaddr_t argv; 1746 pid_t pid; 1747 int nargv, type, error, i; 1748 char *arg; 1749 char *tmp; 1750 1751 if (namelen != 2) 1752 return (EINVAL); 1753 pid = name[0]; 1754 type = name[1]; 1755 1756 switch (type) { 1757 case KERN_PROC_ARGV: 1758 case KERN_PROC_NARGV: 1759 case KERN_PROC_ENV: 1760 case KERN_PROC_NENV: 1761 /* ok */ 1762 break; 1763 default: 1764 return (EINVAL); 1765 } 1766 1767 /* check pid */ 1768 if ((p = pfind(pid)) == NULL) 1769 return (EINVAL); 1770 1771 /* only root or same user change look at the environment */ 1772 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1773 if (up->p_ucred->cr_uid != 0) { 1774 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1775 up->p_cred->p_ruid != p->p_cred->p_svuid) 1776 return (EPERM); 1777 } 1778 } 1779 1780 if (sizep != NULL && where == NULL) { 1781 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1782 *sizep = sizeof (int); 1783 else 1784 *sizep = ARG_MAX; /* XXX XXX XXX */ 1785 return (0); 1786 } 1787 if (where == NULL || sizep == NULL) 1788 return (EINVAL); 1789 1790 /* 1791 * Zombies don't have a stack, so we can't read their psstrings. 1792 * System processes also don't have a user stack. 1793 */ 1794 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1795 return (EINVAL); 1796 1797 /* 1798 * Lock the process down in memory. 1799 */ 1800 /* XXXCDC: how should locking work here? */ 1801 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1802 return (EFAULT); 1803 1804 p->p_vmspace->vm_refcnt++; /* XXX */ 1805 1806 /* 1807 * Allocate a temporary buffer to hold the arguments. 1808 */ 1809 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1810 1811 /* 1812 * Read in the ps_strings structure. 1813 */ 1814 aiov.iov_base = &pss; 1815 aiov.iov_len = sizeof(pss); 1816 auio.uio_iov = &aiov; 1817 auio.uio_iovcnt = 1; 1818 auio.uio_offset = (vaddr_t)p->p_psstr; 1819 auio.uio_resid = sizeof(pss); 1820 auio.uio_segflg = UIO_SYSSPACE; 1821 auio.uio_rw = UIO_READ; 1822 auio.uio_procp = NULL; 1823 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1824 if (error) 1825 goto done; 1826 1827 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1828 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1829 else 1830 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1831 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1832 error = copyout(&nargv, where, sizeof(nargv)); 1833 *sizep = sizeof(nargv); 1834 goto done; 1835 } 1836 /* 1837 * Now read the address of the argument vector. 1838 */ 1839 switch (type) { 1840 case KERN_PROC_ARGV: 1841 /* XXX compat32 stuff here */ 1842 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1843 break; 1844 case KERN_PROC_ENV: 1845 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1846 break; 1847 default: 1848 return (EINVAL); 1849 } 1850 auio.uio_offset = (off_t)(long)tmp; 1851 aiov.iov_base = &argv; 1852 aiov.iov_len = sizeof(argv); 1853 auio.uio_iov = &aiov; 1854 auio.uio_iovcnt = 1; 1855 auio.uio_resid = sizeof(argv); 1856 auio.uio_segflg = UIO_SYSSPACE; 1857 auio.uio_rw = UIO_READ; 1858 auio.uio_procp = NULL; 1859 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1860 if (error) 1861 goto done; 1862 1863 /* 1864 * Now copy in the actual argument vector, one page at a time, 1865 * since we don't know how long the vector is (though, we do 1866 * know how many NUL-terminated strings are in the vector). 1867 */ 1868 len = 0; 1869 upper_bound = *sizep; 1870 for (; nargv != 0 && len < upper_bound; len += xlen) { 1871 aiov.iov_base = arg; 1872 aiov.iov_len = PAGE_SIZE; 1873 auio.uio_iov = &aiov; 1874 auio.uio_iovcnt = 1; 1875 auio.uio_offset = argv + len; 1876 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1877 auio.uio_resid = xlen; 1878 auio.uio_segflg = UIO_SYSSPACE; 1879 auio.uio_rw = UIO_READ; 1880 auio.uio_procp = NULL; 1881 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1882 if (error) 1883 goto done; 1884 1885 for (i = 0; i < xlen && nargv != 0; i++) { 1886 if (arg[i] == '\0') 1887 nargv--; /* one full string */ 1888 } 1889 1890 /* make sure we don't copyout past the end of the user's buffer */ 1891 if (len + i > upper_bound) 1892 i = upper_bound - len; 1893 1894 error = copyout(arg, (char *)where + len, i); 1895 if (error) 1896 break; 1897 1898 if (nargv == 0) { 1899 len += i; 1900 break; 1901 } 1902 } 1903 *sizep = len; 1904 1905 done: 1906 uvmspace_free(p->p_vmspace); 1907 1908 free(arg, M_TEMP); 1909 return (error); 1910 } 1911 1912 #if NPTY > 0 1913 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1914 1915 /* 1916 * Validate parameters and get old / set new parameters 1917 * for pty sysctl function. 1918 */ 1919 static int 1920 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 1921 { 1922 int error = 0; 1923 int oldmax = 0, newmax = 0; 1924 1925 /* get current value of maxptys */ 1926 oldmax = pty_maxptys(0, 0); 1927 1928 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 1929 1930 if (!error && newp) { 1931 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1932 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 1933 1934 if (newmax != pty_maxptys(newmax, (newp != NULL))) 1935 return (EINVAL); 1936 1937 } 1938 1939 return (error); 1940 } 1941 #endif /* NPTY > 0 */ 1942
Indexes created Tue Sep 30 07:10:03 GMT 2025