kern_sysctl.c revision 1.72
1 /* $NetBSD: kern_sysctl.c,v 1.72 2000/06/16 00:18:09 simonb Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95 39 */ 40 41 /* 42 * sysctl system call. 43 */ 44 45 #include "opt_ddb.h" 46 #include "opt_insecure.h" 47 #include "opt_defcorename.h" 48 #include "opt_sysv.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/kernel.h> 53 #include <sys/buf.h> 54 #include <sys/device.h> 55 #include <sys/disklabel.h> 56 #include <sys/dkstat.h> 57 #include <sys/exec.h> 58 #include <sys/file.h> 59 #include <sys/ioctl.h> 60 #include <sys/malloc.h> 61 #include <sys/mount.h> 62 #include <sys/msgbuf.h> 63 #include <sys/pool.h> 64 #include <sys/proc.h> 65 #include <sys/resource.h> 66 #include <sys/resourcevar.h> 67 #include <sys/syscallargs.h> 68 #include <sys/tty.h> 69 #include <sys/unistd.h> 70 #include <sys/vnode.h> 71 #include <sys/sysctl.h> 72 73 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 74 #include <sys/ipc.h> 75 #endif 76 #ifdef SYSVMSG 77 #include <sys/msg.h> 78 #endif 79 #ifdef SYSVSEM 80 #include <sys/sem.h> 81 #endif 82 #ifdef SYSVSHM 83 #include <sys/shm.h> 84 #endif 85 86 #if defined(DDB) 87 #include <ddb/ddbvar.h> 88 #endif 89 90 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 91 92 /* 93 * Locking and stats 94 */ 95 static struct sysctl_lock { 96 int sl_lock; 97 int sl_want; 98 int sl_locked; 99 } memlock; 100 101 static int sysctl_file __P((void *, size_t *)); 102 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 103 static int sysctl_sysvipc __P((int *, u_int, void *, size_t *)); 104 #endif 105 static int sysctl_msgbuf __P((void *, size_t *)); 106 static int sysctl_doeproc __P((int *, u_int, void *, size_t *)); 107 static void fill_kproc2 __P((struct proc *, struct kinfo_proc2 *)); 108 static int sysctl_procargs __P((int *, u_int, void *, size_t *, struct proc *)); 109 110 int 111 sys___sysctl(p, v, retval) 112 struct proc *p; 113 void *v; 114 register_t *retval; 115 { 116 struct sys___sysctl_args /* { 117 syscallarg(int *) name; 118 syscallarg(u_int) namelen; 119 syscallarg(void *) old; 120 syscallarg(size_t *) oldlenp; 121 syscallarg(void *) new; 122 syscallarg(size_t) newlen; 123 } */ *uap = v; 124 int error, dolock = 1; 125 size_t savelen = 0, oldlen = 0; 126 sysctlfn *fn; 127 int name[CTL_MAXNAME]; 128 size_t *oldlenp; 129 130 /* 131 * all top-level sysctl names are non-terminal 132 */ 133 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 134 return (EINVAL); 135 error = copyin(SCARG(uap, name), &name, 136 SCARG(uap, namelen) * sizeof(int)); 137 if (error) 138 return (error); 139 140 /* 141 * For all but CTL_PROC, must be root to change a value. 142 * For CTL_PROC, must be root, or owner of the proc (and not suid), 143 * this is checked in proc_sysctl() (once we know the targer proc). 144 */ 145 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 146 (error = suser(p->p_ucred, &p->p_acflag))) 147 return error; 148 149 switch (name[0]) { 150 case CTL_KERN: 151 fn = kern_sysctl; 152 if (name[2] != KERN_VNODE) /* XXX */ 153 dolock = 0; 154 break; 155 case CTL_HW: 156 fn = hw_sysctl; 157 break; 158 case CTL_VM: 159 fn = uvm_sysctl; 160 break; 161 case CTL_NET: 162 fn = net_sysctl; 163 break; 164 case CTL_VFS: 165 fn = vfs_sysctl; 166 break; 167 case CTL_MACHDEP: 168 fn = cpu_sysctl; 169 break; 170 #ifdef DEBUG 171 case CTL_DEBUG: 172 fn = debug_sysctl; 173 break; 174 #endif 175 #ifdef DDB 176 case CTL_DDB: 177 fn = ddb_sysctl; 178 break; 179 #endif 180 case CTL_PROC: 181 fn = proc_sysctl; 182 break; 183 default: 184 return (EOPNOTSUPP); 185 } 186 187 oldlenp = SCARG(uap, oldlenp); 188 if (oldlenp) { 189 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 190 return (error); 191 oldlenp = &oldlen; 192 } 193 if (SCARG(uap, old) != NULL) { 194 if (!uvm_useracc(SCARG(uap, old), oldlen, B_WRITE)) 195 return (EFAULT); 196 while (memlock.sl_lock) { 197 memlock.sl_want = 1; 198 (void) tsleep(&memlock, PRIBIO+1, "memlock", 0); 199 memlock.sl_locked++; 200 } 201 memlock.sl_lock = 1; 202 if (dolock) { 203 /* 204 * XXX Um, this is kind of evil. What should we 205 * XXX be passing here? 206 */ 207 if (uvm_vslock(p, SCARG(uap, old), oldlen, 208 VM_PROT_NONE) != KERN_SUCCESS) { 209 memlock.sl_lock = 0; 210 if (memlock.sl_want) { 211 memlock.sl_want = 0; 212 wakeup((caddr_t)&memlock); 213 return (EFAULT); 214 } 215 } 216 } 217 savelen = oldlen; 218 } 219 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 220 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 221 if (SCARG(uap, old) != NULL) { 222 if (dolock) 223 uvm_vsunlock(p, SCARG(uap, old), savelen); 224 memlock.sl_lock = 0; 225 if (memlock.sl_want) { 226 memlock.sl_want = 0; 227 wakeup((caddr_t)&memlock); 228 } 229 } 230 if (error) 231 return (error); 232 if (SCARG(uap, oldlenp)) 233 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 234 return (error); 235 } 236 237 /* 238 * Attributes stored in the kernel. 239 */ 240 char hostname[MAXHOSTNAMELEN]; 241 int hostnamelen; 242 char domainname[MAXHOSTNAMELEN]; 243 int domainnamelen; 244 long hostid; 245 #ifdef INSECURE 246 int securelevel = -1; 247 #else 248 int securelevel = 0; 249 #endif 250 #ifdef DEFCORENAME 251 char defcorename[MAXPATHLEN] = DEFCORENAME; 252 int defcorenamelen = sizeof(DEFCORENAME); 253 #else 254 char defcorename[MAXPATHLEN] = "%n.core"; 255 int defcorenamelen = sizeof("%n.core"); 256 #endif 257 extern int kern_logsigexit; 258 extern fixpt_t ccpu; 259 260 /* 261 * kernel related system variables. 262 */ 263 int 264 kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 265 int *name; 266 u_int namelen; 267 void *oldp; 268 size_t *oldlenp; 269 void *newp; 270 size_t newlen; 271 struct proc *p; 272 { 273 int error, level, inthostid; 274 int old_autonicetime; 275 int old_vnodes; 276 277 /* All sysctl names at this level, except for a few, are terminal. */ 278 switch (name[0]) { 279 case KERN_PROC: 280 case KERN_PROC2: 281 case KERN_PROF: 282 case KERN_MBUF: 283 case KERN_PROC_ARGS: 284 case KERN_SYSVIPC_INFO: 285 /* Not terminal. */ 286 break; 287 default: 288 if (namelen != 1) 289 return (ENOTDIR); /* overloaded */ 290 } 291 292 switch (name[0]) { 293 case KERN_OSTYPE: 294 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 295 case KERN_OSRELEASE: 296 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 297 case KERN_OSREV: 298 return (sysctl_rdint(oldp, oldlenp, newp, NetBSD)); 299 case KERN_VERSION: 300 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 301 case KERN_MAXVNODES: 302 old_vnodes = desiredvnodes; 303 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 304 if (old_vnodes > desiredvnodes) { 305 desiredvnodes = old_vnodes; 306 return (EINVAL); 307 } 308 return (error); 309 case KERN_MAXPROC: 310 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 311 case KERN_MAXFILES: 312 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 313 case KERN_ARGMAX: 314 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 315 case KERN_SECURELVL: 316 level = securelevel; 317 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 318 newp == NULL) 319 return (error); 320 if (level < securelevel && p->p_pid != 1) 321 return (EPERM); 322 securelevel = level; 323 return (0); 324 case KERN_HOSTNAME: 325 error = sysctl_string(oldp, oldlenp, newp, newlen, 326 hostname, sizeof(hostname)); 327 if (newp && !error) 328 hostnamelen = newlen; 329 return (error); 330 case KERN_DOMAINNAME: 331 error = sysctl_string(oldp, oldlenp, newp, newlen, 332 domainname, sizeof(domainname)); 333 if (newp && !error) 334 domainnamelen = newlen; 335 return (error); 336 case KERN_HOSTID: 337 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 338 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 339 hostid = inthostid; 340 return (error); 341 case KERN_CLOCKRATE: 342 return (sysctl_clockrate(oldp, oldlenp)); 343 case KERN_BOOTTIME: 344 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 345 sizeof(struct timeval))); 346 case KERN_VNODE: 347 return (sysctl_vnode(oldp, oldlenp, p)); 348 case KERN_PROC: 349 case KERN_PROC2: 350 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 351 case KERN_PROC_ARGS: 352 return (sysctl_procargs(name + 1, namelen - 1, 353 oldp, oldlenp, p)); 354 case KERN_FILE: 355 return (sysctl_file(oldp, oldlenp)); 356 #ifdef GPROF 357 case KERN_PROF: 358 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 359 newp, newlen)); 360 #endif 361 case KERN_POSIX1: 362 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 363 case KERN_NGROUPS: 364 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 365 case KERN_JOB_CONTROL: 366 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 367 case KERN_SAVED_IDS: 368 #ifdef _POSIX_SAVED_IDS 369 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 370 #else 371 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 372 #endif 373 case KERN_MAXPARTITIONS: 374 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 375 case KERN_RAWPARTITION: 376 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 377 #ifdef NTP 378 case KERN_NTPTIME: 379 return (sysctl_ntptime(oldp, oldlenp)); 380 #endif 381 case KERN_AUTONICETIME: 382 old_autonicetime = autonicetime; 383 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 384 if (autonicetime < 0) 385 autonicetime = old_autonicetime; 386 return (error); 387 case KERN_AUTONICEVAL: 388 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 389 if (autoniceval < PRIO_MIN) 390 autoniceval = PRIO_MIN; 391 if (autoniceval > PRIO_MAX) 392 autoniceval = PRIO_MAX; 393 return (error); 394 case KERN_RTC_OFFSET: 395 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 396 case KERN_ROOT_DEVICE: 397 return (sysctl_rdstring(oldp, oldlenp, newp, 398 root_device->dv_xname)); 399 case KERN_MSGBUFSIZE: 400 /* 401 * deal with cases where the message buffer has 402 * become corrupted. 403 */ 404 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 405 msgbufenabled = 0; 406 return (ENXIO); 407 } 408 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 409 case KERN_FSYNC: 410 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 411 case KERN_SYSVMSG: 412 #ifdef SYSVMSG 413 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 414 #else 415 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 416 #endif 417 case KERN_SYSVSEM: 418 #ifdef SYSVSEM 419 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 420 #else 421 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 422 #endif 423 case KERN_SYSVSHM: 424 #ifdef SYSVSHM 425 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 426 #else 427 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 428 #endif 429 case KERN_DEFCORENAME: 430 if (newp && newlen < 1) 431 return (EINVAL); 432 error = sysctl_string(oldp, oldlenp, newp, newlen, 433 defcorename, sizeof(defcorename)); 434 if (newp && !error) 435 defcorenamelen = newlen; 436 return (error); 437 case KERN_SYNCHRONIZED_IO: 438 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 439 case KERN_IOV_MAX: 440 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 441 case KERN_MBUF: 442 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 443 newp, newlen)); 444 case KERN_MAPPED_FILES: 445 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 446 case KERN_MEMLOCK: 447 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 448 case KERN_MEMLOCK_RANGE: 449 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 450 case KERN_MEMORY_PROTECTION: 451 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 452 case KERN_LOGIN_NAME_MAX: 453 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 454 case KERN_LOGSIGEXIT: 455 return (sysctl_int(oldp, oldlenp, newp, newlen, 456 &kern_logsigexit)); 457 case KERN_FSCALE: 458 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 459 case KERN_CCPU: 460 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 461 case KERN_CP_TIME: 462 /* XXXSMP: WRONG! */ 463 return (sysctl_rdstruct(oldp, oldlenp, newp, 464 curcpu()->ci_schedstate.spc_cp_time, 465 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 466 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 467 case KERN_SYSVIPC_INFO: 468 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 469 #endif 470 case KERN_MSGBUF: 471 return (sysctl_msgbuf(oldp, oldlenp)); 472 default: 473 return (EOPNOTSUPP); 474 } 475 /* NOTREACHED */ 476 } 477 478 /* 479 * hardware related system variables. 480 */ 481 int 482 hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 483 int *name; 484 u_int namelen; 485 void *oldp; 486 size_t *oldlenp; 487 void *newp; 488 size_t newlen; 489 struct proc *p; 490 { 491 492 /* all sysctl names at this level are terminal */ 493 if (namelen != 1) 494 return (ENOTDIR); /* overloaded */ 495 496 switch (name[0]) { 497 case HW_MACHINE: 498 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 499 case HW_MACHINE_ARCH: 500 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 501 case HW_MODEL: 502 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 503 case HW_NCPU: 504 return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */ 505 case HW_BYTEORDER: 506 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 507 case HW_PHYSMEM: 508 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 509 case HW_USERMEM: 510 return (sysctl_rdint(oldp, oldlenp, newp, 511 ctob(physmem - uvmexp.wired))); 512 case HW_PAGESIZE: 513 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 514 case HW_ALIGNBYTES: 515 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 516 default: 517 return (EOPNOTSUPP); 518 } 519 /* NOTREACHED */ 520 } 521 522 #ifdef DEBUG 523 /* 524 * Debugging related system variables. 525 */ 526 struct ctldebug debug0, debug1, debug2, debug3, debug4; 527 struct ctldebug debug5, debug6, debug7, debug8, debug9; 528 struct ctldebug debug10, debug11, debug12, debug13, debug14; 529 struct ctldebug debug15, debug16, debug17, debug18, debug19; 530 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 531 &debug0, &debug1, &debug2, &debug3, &debug4, 532 &debug5, &debug6, &debug7, &debug8, &debug9, 533 &debug10, &debug11, &debug12, &debug13, &debug14, 534 &debug15, &debug16, &debug17, &debug18, &debug19, 535 }; 536 int 537 debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 538 int *name; 539 u_int namelen; 540 void *oldp; 541 size_t *oldlenp; 542 void *newp; 543 size_t newlen; 544 struct proc *p; 545 { 546 struct ctldebug *cdp; 547 548 /* all sysctl names at this level are name and field */ 549 if (namelen != 2) 550 return (ENOTDIR); /* overloaded */ 551 cdp = debugvars[name[0]]; 552 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 553 return (EOPNOTSUPP); 554 switch (name[1]) { 555 case CTL_DEBUG_NAME: 556 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 557 case CTL_DEBUG_VALUE: 558 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 559 default: 560 return (EOPNOTSUPP); 561 } 562 /* NOTREACHED */ 563 } 564 #endif /* DEBUG */ 565 566 int 567 proc_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 568 int *name; 569 u_int namelen; 570 void *oldp; 571 size_t *oldlenp; 572 void *newp; 573 size_t newlen; 574 struct proc *p; 575 { 576 struct proc *ptmp = NULL; 577 const struct proclist_desc *pd; 578 int error = 0; 579 struct rlimit alim; 580 struct plimit *newplim; 581 char *tmps = NULL; 582 int i, curlen, len; 583 584 if (namelen < 2) 585 return EINVAL; 586 587 if (name[0] == PROC_CURPROC) { 588 ptmp = p; 589 } else { 590 proclist_lock_read(); 591 for (pd = proclists; pd->pd_list != NULL; pd++) { 592 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 593 ptmp = LIST_NEXT(ptmp, p_list)) { 594 /* Skip embryonic processes. */ 595 if (ptmp->p_stat == SIDL) 596 continue; 597 if (ptmp->p_pid == (pid_t)name[0]) 598 break; 599 } 600 if (ptmp != NULL) 601 break; 602 } 603 proclist_unlock_read(); 604 if (ptmp == NULL) 605 return(ESRCH); 606 if (p->p_ucred->cr_uid != 0) { 607 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 608 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 609 return EPERM; 610 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 611 return EPERM; /* sgid proc */ 612 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 613 if (p->p_ucred->cr_groups[i] == 614 ptmp->p_cred->p_rgid) 615 break; 616 } 617 if (i == p->p_ucred->cr_ngroups) 618 return EPERM; 619 } 620 } 621 if (name[1] == PROC_PID_CORENAME) { 622 if (namelen != 2) 623 return EINVAL; 624 /* 625 * Can't use sysctl_string() here because we may malloc a new 626 * area during the process, so we have to do it by hand. 627 */ 628 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 629 if (oldlenp && *oldlenp < curlen) { 630 if (!oldp) 631 *oldlenp = curlen; 632 return (ENOMEM); 633 } 634 if (newp) { 635 if (securelevel > 2) 636 return EPERM; 637 if (newlen > MAXPATHLEN) 638 return ENAMETOOLONG; 639 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 640 if (tmps == NULL) 641 return ENOMEM; 642 error = copyin(newp, tmps, newlen + 1); 643 tmps[newlen] = '\0'; 644 if (error) 645 goto cleanup; 646 /* Enforce to be either 'core' for end with '.core' */ 647 if (newlen < 4) { /* c.o.r.e */ 648 error = EINVAL; 649 goto cleanup; 650 } 651 len = newlen - 4; 652 if (len > 0) { 653 if (tmps[len - 1] != '.' && 654 tmps[len - 1] != '/') { 655 error = EINVAL; 656 goto cleanup; 657 } 658 } 659 if (strcmp(&tmps[len], "core") != 0) { 660 error = EINVAL; 661 goto cleanup; 662 } 663 } 664 if (oldp && oldlenp) { 665 *oldlenp = curlen; 666 error = copyout(ptmp->p_limit->pl_corename, oldp, 667 curlen); 668 } 669 if (newp && error == 0) { 670 /* if the 2 strings are identical, don't limcopy() */ 671 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 672 error = 0; 673 goto cleanup; 674 } 675 if (ptmp->p_limit->p_refcnt > 1 && 676 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 677 newplim = limcopy(ptmp->p_limit); 678 limfree(ptmp->p_limit); 679 ptmp->p_limit = newplim; 680 } else if (ptmp->p_limit->pl_corename != defcorename) { 681 free(ptmp->p_limit->pl_corename, M_TEMP); 682 } 683 ptmp->p_limit->pl_corename = tmps; 684 return (0); 685 } 686 cleanup: 687 if (tmps) 688 free(tmps, M_TEMP); 689 return (error); 690 } 691 if (name[1] == PROC_PID_LIMIT) { 692 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 693 return EINVAL; 694 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 695 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 696 error = sysctl_quad(oldp, oldlenp, newp, newlen, 697 &alim.rlim_max); 698 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 699 error = sysctl_quad(oldp, oldlenp, newp, newlen, 700 &alim.rlim_cur); 701 else 702 error = EINVAL; 703 704 if (error) 705 return error; 706 707 if (newp) 708 error = dosetrlimit(ptmp, p->p_cred, 709 name[2] - 1, &alim); 710 return error; 711 } 712 return (EINVAL); 713 } 714 715 /* 716 * Convenience macros. 717 */ 718 719 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 720 if (oldlenp) { \ 721 if (!oldp) \ 722 *oldlenp = len; \ 723 else { \ 724 if (*oldlenp < len) \ 725 return(ENOMEM); \ 726 *oldlenp = len; \ 727 error = copyout((caddr_t)valp, oldp, len); \ 728 } \ 729 } 730 731 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 732 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 733 734 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 735 if (newp && newlen != len) \ 736 return (EINVAL); 737 738 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 739 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 740 741 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 742 if (error == 0 && newp) \ 743 error = copyin(newp, valp, len); 744 745 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 746 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 747 748 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 749 if (oldlenp) { \ 750 len = strlen(str) + 1; \ 751 if (!oldp) \ 752 *oldlenp = len; \ 753 else { \ 754 if (*oldlenp < len) { \ 755 err2 = ENOMEM; \ 756 len = *oldlenp; \ 757 } else \ 758 *oldlenp = len; \ 759 error = copyout(str, oldp, len);\ 760 if (error == 0) \ 761 error = err2; \ 762 } \ 763 } 764 765 /* 766 * Validate parameters and get old / set new parameters 767 * for an integer-valued sysctl function. 768 */ 769 int 770 sysctl_int(oldp, oldlenp, newp, newlen, valp) 771 void *oldp; 772 size_t *oldlenp; 773 void *newp; 774 size_t newlen; 775 int *valp; 776 { 777 int error = 0; 778 779 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 780 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 781 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 782 783 return (error); 784 } 785 786 787 /* 788 * As above, but read-only. 789 */ 790 int 791 sysctl_rdint(oldp, oldlenp, newp, val) 792 void *oldp; 793 size_t *oldlenp; 794 void *newp; 795 int val; 796 { 797 int error = 0; 798 799 if (newp) 800 return (EPERM); 801 802 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 803 804 return (error); 805 } 806 807 /* 808 * Validate parameters and get old / set new parameters 809 * for an quad-valued sysctl function. 810 */ 811 int 812 sysctl_quad(oldp, oldlenp, newp, newlen, valp) 813 void *oldp; 814 size_t *oldlenp; 815 void *newp; 816 size_t newlen; 817 quad_t *valp; 818 { 819 int error = 0; 820 821 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 822 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 823 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 824 825 return (error); 826 } 827 828 /* 829 * As above, but read-only. 830 */ 831 int 832 sysctl_rdquad(oldp, oldlenp, newp, val) 833 void *oldp; 834 size_t *oldlenp; 835 void *newp; 836 quad_t val; 837 { 838 int error = 0; 839 840 if (newp) 841 return (EPERM); 842 843 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 844 845 return (error); 846 } 847 848 /* 849 * Validate parameters and get old / set new parameters 850 * for a string-valued sysctl function. 851 */ 852 int 853 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 854 void *oldp; 855 size_t *oldlenp; 856 void *newp; 857 size_t newlen; 858 char *str; 859 int maxlen; 860 { 861 int len, error = 0, err2 = 0; 862 863 if (newp && newlen >= maxlen) 864 return (EINVAL); 865 866 SYSCTL_STRING_CORE(oldp, oldlenp, str); 867 868 if (error == 0 && newp) { 869 error = copyin(newp, str, newlen); 870 str[newlen] = 0; 871 } 872 return (error); 873 } 874 875 /* 876 * As above, but read-only. 877 */ 878 int 879 sysctl_rdstring(oldp, oldlenp, newp, str) 880 void *oldp; 881 size_t *oldlenp; 882 void *newp; 883 char *str; 884 { 885 int len, error = 0, err2 = 0; 886 887 if (newp) 888 return (EPERM); 889 890 SYSCTL_STRING_CORE(oldp, oldlenp, str); 891 892 return (error); 893 } 894 895 /* 896 * Validate parameters and get old / set new parameters 897 * for a structure oriented sysctl function. 898 */ 899 int 900 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 901 void *oldp; 902 size_t *oldlenp; 903 void *newp; 904 size_t newlen; 905 void *sp; 906 int len; 907 { 908 int error = 0; 909 910 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 911 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 912 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 913 914 return (error); 915 } 916 917 /* 918 * Validate parameters and get old parameters 919 * for a structure oriented sysctl function. 920 */ 921 int 922 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 923 void *oldp; 924 size_t *oldlenp; 925 void *newp, *sp; 926 int len; 927 { 928 int error = 0; 929 930 if (newp) 931 return (EPERM); 932 933 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 934 935 return (error); 936 } 937 938 /* 939 * Get file structures. 940 */ 941 static int 942 sysctl_file(vwhere, sizep) 943 void *vwhere; 944 size_t *sizep; 945 { 946 int buflen, error; 947 struct file *fp; 948 char *start, *where; 949 950 start = where = vwhere; 951 buflen = *sizep; 952 if (where == NULL) { 953 /* 954 * overestimate by 10 files 955 */ 956 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 957 return (0); 958 } 959 960 /* 961 * first copyout filehead 962 */ 963 if (buflen < sizeof(filehead)) { 964 *sizep = 0; 965 return (0); 966 } 967 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 968 if (error) 969 return (error); 970 buflen -= sizeof(filehead); 971 where += sizeof(filehead); 972 973 /* 974 * followed by an array of file structures 975 */ 976 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 977 if (buflen < sizeof(struct file)) { 978 *sizep = where - start; 979 return (ENOMEM); 980 } 981 error = copyout((caddr_t)fp, where, sizeof(struct file)); 982 if (error) 983 return (error); 984 buflen -= sizeof(struct file); 985 where += sizeof(struct file); 986 } 987 *sizep = where - start; 988 return (0); 989 } 990 991 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 992 #define FILL_PERM(src, dst) do { \ 993 (dst)._key = (src)._key; \ 994 (dst).uid = (src).uid; \ 995 (dst).gid = (src).gid; \ 996 (dst).cuid = (src).cuid; \ 997 (dst).cgid = (src).cgid; \ 998 (dst).mode = (src).mode; \ 999 (dst)._seq = (src)._seq; \ 1000 } while (0); 1001 #define FILL_MSG(src, dst) do { \ 1002 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1003 (dst).msg_qnum = (src).msg_qnum; \ 1004 (dst).msg_qbytes = (src).msg_qbytes; \ 1005 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1006 (dst).msg_lspid = (src).msg_lspid; \ 1007 (dst).msg_lrpid = (src).msg_lrpid; \ 1008 (dst).msg_stime = (src).msg_stime; \ 1009 (dst).msg_rtime = (src).msg_rtime; \ 1010 (dst).msg_ctime = (src).msg_ctime; \ 1011 } while (0) 1012 #define FILL_SEM(src, dst) do { \ 1013 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1014 (dst).sem_nsems = (src).sem_nsems; \ 1015 (dst).sem_otime = (src).sem_otime; \ 1016 (dst).sem_ctime = (src).sem_ctime; \ 1017 } while (0) 1018 #define FILL_SHM(src, dst) do { \ 1019 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1020 (dst).shm_segsz = (src).shm_segsz; \ 1021 (dst).shm_lpid = (src).shm_lpid; \ 1022 (dst).shm_cpid = (src).shm_cpid; \ 1023 (dst).shm_atime = (src).shm_atime; \ 1024 (dst).shm_dtime = (src).shm_dtime; \ 1025 (dst).shm_ctime = (src).shm_ctime; \ 1026 (dst).shm_nattch = (src).shm_nattch; \ 1027 } while (0) 1028 1029 static int 1030 sysctl_sysvipc(name, namelen, where, sizep) 1031 int *name; 1032 u_int namelen; 1033 void *where; 1034 size_t *sizep; 1035 { 1036 struct msg_sysctl_info *msgsi; 1037 struct sem_sysctl_info *semsi; 1038 struct shm_sysctl_info *shmsi; 1039 size_t infosize, dssize, tsize, buflen; 1040 void *buf = NULL, *buf2; 1041 char *start; 1042 int32_t nds; 1043 int i, error, ret; 1044 1045 if (namelen != 1) 1046 return (EINVAL); 1047 1048 start = where; 1049 buflen = *sizep; 1050 1051 switch (*name) { 1052 case KERN_SYSVIPC_MSG_INFO: 1053 #ifdef SYSVMSG 1054 infosize = sizeof(msgsi->msginfo); 1055 nds = msginfo.msgmni; 1056 dssize = sizeof(msgsi->msgids[0]); 1057 break; 1058 #else 1059 return (EINVAL); 1060 #endif 1061 case KERN_SYSVIPC_SEM_INFO: 1062 #ifdef SYSVSEM 1063 infosize = sizeof(semsi->seminfo); 1064 nds = seminfo.semmni; 1065 dssize = sizeof(semsi->semids[0]); 1066 break; 1067 #else 1068 return (EINVAL); 1069 #endif 1070 case KERN_SYSVIPC_SHM_INFO: 1071 #ifdef SYSVSHM 1072 infosize = sizeof(shmsi->shminfo); 1073 nds = shminfo.shmmni; 1074 dssize = sizeof(shmsi->shmids[0]); 1075 break; 1076 #else 1077 return (EINVAL); 1078 #endif 1079 default: 1080 return (EINVAL); 1081 } 1082 /* 1083 * Round infosize to 64 bit boundary if requesting more than just 1084 * the info structure or getting the total data size. 1085 */ 1086 if (where == NULL || *sizep > infosize) 1087 infosize = ((infosize + 7) / 8) * 8; 1088 tsize = infosize + nds * dssize; 1089 1090 /* Return just the total size required. */ 1091 if (where == NULL) { 1092 *sizep = tsize; 1093 return (0); 1094 } 1095 1096 /* Not enough room for even the info struct. */ 1097 if (buflen < infosize) { 1098 *sizep = 0; 1099 return (ENOMEM); 1100 } 1101 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1102 memset(buf, 0, min(tsize, buflen)); 1103 1104 switch (*name) { 1105 case KERN_SYSVIPC_MSG_INFO: 1106 msgsi = (struct msg_sysctl_info *)buf; 1107 buf2 = &msgsi->msgids[0]; 1108 msgsi->msginfo = msginfo; 1109 break; 1110 case KERN_SYSVIPC_SEM_INFO: 1111 semsi = (struct sem_sysctl_info *)buf; 1112 buf2 = &semsi->semids[0]; 1113 semsi->seminfo = seminfo; 1114 break; 1115 case KERN_SYSVIPC_SHM_INFO: 1116 shmsi = (struct shm_sysctl_info *)buf; 1117 buf2 = &shmsi->shmids[0]; 1118 shmsi->shminfo = shminfo; 1119 break; 1120 } 1121 buflen -= infosize; 1122 1123 ret = 0; 1124 if (buflen > 0) { 1125 /* Fill in the IPC data structures. */ 1126 for (i = 0; i < nds; i++) { 1127 if (buflen < dssize) { 1128 ret = ENOMEM; 1129 break; 1130 } 1131 switch (*name) { 1132 case KERN_SYSVIPC_MSG_INFO: 1133 FILL_MSG(msqids[i], msgsi->msgids[i]); 1134 break; 1135 case KERN_SYSVIPC_SEM_INFO: 1136 FILL_SEM(sema[i], semsi->semids[i]); 1137 break; 1138 case KERN_SYSVIPC_SHM_INFO: 1139 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1140 break; 1141 } 1142 buflen -= dssize; 1143 } 1144 } 1145 *sizep -= buflen; 1146 error = copyout(buf, start, *sizep); 1147 /* If copyout succeeded, use return code set earlier. */ 1148 if (error == 0) 1149 error = ret; 1150 if (buf) 1151 free(buf, M_TEMP); 1152 return (error); 1153 } 1154 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1155 1156 static int 1157 sysctl_msgbuf(vwhere, sizep) 1158 void *vwhere; 1159 size_t *sizep; 1160 { 1161 char *where = vwhere; 1162 size_t len, maxlen = *sizep; 1163 long pos; 1164 int error; 1165 1166 /* 1167 * deal with cases where the message buffer has 1168 * become corrupted. 1169 */ 1170 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1171 msgbufenabled = 0; 1172 return (ENXIO); 1173 } 1174 1175 if (where == NULL) { 1176 /* always return full buffer size */ 1177 *sizep = msgbufp->msg_bufs; 1178 return (0); 1179 } 1180 1181 error = 0; 1182 maxlen = min(msgbufp->msg_bufs, maxlen); 1183 pos = msgbufp->msg_bufx; 1184 while (maxlen > 0) { 1185 len = pos == 0 ? msgbufp->msg_bufx : msgbufp->msg_bufs - msgbufp->msg_bufx; 1186 len = min(len, maxlen); 1187 if (len == 0) 1188 break; 1189 error = copyout(&msgbufp->msg_bufc[pos], where, len); 1190 if (error) 1191 break; 1192 where += len; 1193 maxlen -= len; 1194 pos = 0; 1195 } 1196 return (error); 1197 } 1198 1199 /* 1200 * try over estimating by 5 procs 1201 */ 1202 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1203 1204 static int 1205 sysctl_doeproc(name, namelen, vwhere, sizep) 1206 int *name; 1207 u_int namelen; 1208 void *vwhere; 1209 size_t *sizep; 1210 { 1211 struct eproc eproc; 1212 struct kinfo_proc2 kproc2; 1213 struct kinfo_proc *dp; 1214 struct proc *p; 1215 const struct proclist_desc *pd; 1216 char *where, *dp2; 1217 int type, op, arg, elem_size, elem_count; 1218 int buflen, needed, error; 1219 1220 dp = vwhere; 1221 dp2 = where = vwhere; 1222 buflen = where != NULL ? *sizep : 0; 1223 error = needed = 0; 1224 type = name[0]; 1225 1226 if (type == KERN_PROC) { 1227 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1228 return (EINVAL); 1229 op = name[1]; 1230 if (op != KERN_PROC_ALL) 1231 arg = name[2]; 1232 } else { 1233 if (namelen != 5) 1234 return (EINVAL); 1235 op = name[1]; 1236 arg = name[2]; 1237 elem_size = name[3]; 1238 elem_count = name[4]; 1239 } 1240 1241 proclist_lock_read(); 1242 1243 pd = proclists; 1244 again: 1245 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1246 /* 1247 * Skip embryonic processes. 1248 */ 1249 if (p->p_stat == SIDL) 1250 continue; 1251 /* 1252 * TODO - make more efficient (see notes below). 1253 * do by session. 1254 */ 1255 switch (op) { 1256 1257 case KERN_PROC_PID: 1258 /* could do this with just a lookup */ 1259 if (p->p_pid != (pid_t)arg) 1260 continue; 1261 break; 1262 1263 case KERN_PROC_PGRP: 1264 /* could do this by traversing pgrp */ 1265 if (p->p_pgrp->pg_id != (pid_t)arg) 1266 continue; 1267 break; 1268 1269 case KERN_PROC_SESSION: 1270 if (p->p_session->s_sid != (pid_t)arg) 1271 continue; 1272 break; 1273 1274 case KERN_PROC_TTY: 1275 if (arg == KERN_PROC_TTY_REVOKE) { 1276 if ((p->p_flag & P_CONTROLT) == 0 || 1277 p->p_session->s_ttyp == NULL || 1278 p->p_session->s_ttyvp != NULL) 1279 continue; 1280 } else if ((p->p_flag & P_CONTROLT) == 0 || 1281 p->p_session->s_ttyp == NULL) { 1282 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1283 continue; 1284 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1285 continue; 1286 break; 1287 1288 case KERN_PROC_UID: 1289 if (p->p_ucred->cr_uid != (uid_t)arg) 1290 continue; 1291 break; 1292 1293 case KERN_PROC_RUID: 1294 if (p->p_cred->p_ruid != (uid_t)arg) 1295 continue; 1296 break; 1297 1298 case KERN_PROC_GID: 1299 if (p->p_ucred->cr_gid != (uid_t)arg) 1300 continue; 1301 break; 1302 1303 case KERN_PROC_RGID: 1304 if (p->p_cred->p_rgid != (uid_t)arg) 1305 continue; 1306 break; 1307 1308 case KERN_PROC_ALL: 1309 /* allow everything */ 1310 break; 1311 1312 default: 1313 error = EINVAL; 1314 goto cleanup; 1315 } 1316 if (type == KERN_PROC) { 1317 if (buflen >= sizeof(struct kinfo_proc)) { 1318 fill_eproc(p, &eproc); 1319 error = copyout((caddr_t)p, &dp->kp_proc, 1320 sizeof(struct proc)); 1321 if (error) 1322 goto cleanup; 1323 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1324 sizeof(eproc)); 1325 if (error) 1326 goto cleanup; 1327 dp++; 1328 buflen -= sizeof(struct kinfo_proc); 1329 } 1330 needed += sizeof(struct kinfo_proc); 1331 } else { /* KERN_PROC2 */ 1332 if (buflen >= elem_size && elem_count > 0) { 1333 fill_kproc2(p, &kproc2); 1334 /* 1335 * Copy out elem_size, but not larger than 1336 * the size of a struct kinfo_proc2. 1337 */ 1338 error = copyout(&kproc2, dp2, 1339 min(sizeof(kproc2), elem_size)); 1340 if (error) 1341 goto cleanup; 1342 dp2 += elem_size; 1343 buflen -= elem_size; 1344 elem_count--; 1345 } 1346 needed += elem_size; 1347 } 1348 } 1349 pd++; 1350 if (pd->pd_list != NULL) 1351 goto again; 1352 proclist_unlock_read(); 1353 1354 if (where != NULL) { 1355 if (type == KERN_PROC) 1356 *sizep = (caddr_t)dp - where; 1357 else 1358 *sizep = dp2 - where; 1359 if (needed > *sizep) 1360 return (ENOMEM); 1361 } else { 1362 needed += KERN_PROCSLOP; 1363 *sizep = needed; 1364 } 1365 return (0); 1366 cleanup: 1367 proclist_unlock_read(); 1368 return (error); 1369 } 1370 1371 /* 1372 * Fill in an eproc structure for the specified process. 1373 */ 1374 void 1375 fill_eproc(p, ep) 1376 struct proc *p; 1377 struct eproc *ep; 1378 { 1379 struct tty *tp; 1380 1381 ep->e_paddr = p; 1382 ep->e_sess = p->p_session; 1383 ep->e_pcred = *p->p_cred; 1384 ep->e_ucred = *p->p_ucred; 1385 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1386 ep->e_vm.vm_rssize = 0; 1387 ep->e_vm.vm_tsize = 0; 1388 ep->e_vm.vm_dsize = 0; 1389 ep->e_vm.vm_ssize = 0; 1390 /* ep->e_vm.vm_pmap = XXX; */ 1391 } else { 1392 struct vmspace *vm = p->p_vmspace; 1393 1394 ep->e_vm.vm_rssize = vm_resident_count(vm); 1395 ep->e_vm.vm_tsize = vm->vm_tsize; 1396 ep->e_vm.vm_dsize = vm->vm_dsize; 1397 ep->e_vm.vm_ssize = vm->vm_ssize; 1398 } 1399 if (p->p_pptr) 1400 ep->e_ppid = p->p_pptr->p_pid; 1401 else 1402 ep->e_ppid = 0; 1403 ep->e_pgid = p->p_pgrp->pg_id; 1404 ep->e_sid = ep->e_sess->s_sid; 1405 ep->e_jobc = p->p_pgrp->pg_jobc; 1406 if ((p->p_flag & P_CONTROLT) && 1407 (tp = ep->e_sess->s_ttyp)) { 1408 ep->e_tdev = tp->t_dev; 1409 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1410 ep->e_tsess = tp->t_session; 1411 } else 1412 ep->e_tdev = NODEV; 1413 if (p->p_wmesg) 1414 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1415 ep->e_xsize = ep->e_xrssize = 0; 1416 ep->e_xccount = ep->e_xswrss = 0; 1417 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1418 if (SESS_LEADER(p)) 1419 ep->e_flag |= EPROC_SLEADER; 1420 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1421 } 1422 1423 /* 1424 * Fill in an eproc structure for the specified process. 1425 */ 1426 static void 1427 fill_kproc2(p, ki) 1428 struct proc *p; 1429 struct kinfo_proc2 *ki; 1430 { 1431 struct tty *tp; 1432 1433 memset(ki, 0, sizeof(*ki)); 1434 1435 ki->p_forw = PTRTOINT64(p->p_forw); 1436 ki->p_back = PTRTOINT64(p->p_back); 1437 ki->p_paddr = PTRTOINT64(p); 1438 1439 ki->p_addr = PTRTOINT64(p->p_addr); 1440 ki->p_fd = PTRTOINT64(p->p_fd); 1441 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1442 ki->p_stats = PTRTOINT64(p->p_stats); 1443 ki->p_limit = PTRTOINT64(p->p_limit); 1444 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1445 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1446 ki->p_sess = PTRTOINT64(p->p_session); 1447 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1448 ki->p_ru = PTRTOINT64(p->p_ru); 1449 1450 ki->p_eflag = 0; 1451 ki->p_exitsig = p->p_exitsig; 1452 ki->p_flag = p->p_flag; 1453 1454 ki->p_pid = p->p_pid; 1455 if (p->p_pptr) 1456 ki->p_ppid = p->p_pptr->p_pid; 1457 else 1458 ki->p_ppid = 0; 1459 ki->p_sid = p->p_session->s_sid; 1460 ki->p__pgid = p->p_pgrp->pg_id; 1461 1462 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1463 1464 ki->p_uid = p->p_ucred->cr_uid; 1465 ki->p_ruid = p->p_cred->p_ruid; 1466 ki->p_gid = p->p_ucred->cr_gid; 1467 ki->p_rgid = p->p_cred->p_rgid; 1468 1469 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1470 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1471 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1472 1473 ki->p_jobc = p->p_pgrp->pg_jobc; 1474 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1475 ki->p_tdev = tp->t_dev; 1476 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1477 ki->p_tsess = PTRTOINT64(tp->t_session); 1478 } else { 1479 ki->p_tdev = NODEV; 1480 } 1481 1482 ki->p_estcpu = p->p_estcpu; 1483 ki->p_rtime_sec = p->p_rtime.tv_sec; 1484 ki->p_rtime_usec = p->p_rtime.tv_usec; 1485 ki->p_cpticks = p->p_cpticks; 1486 ki->p_pctcpu = p->p_pctcpu; 1487 ki->p_swtime = p->p_swtime; 1488 ki->p_slptime = p->p_slptime; 1489 if (p->p_stat == SONPROC) { 1490 KDASSERT(p->p_cpu != NULL); 1491 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1492 } else 1493 ki->p_schedflags = 0; 1494 1495 ki->p_uticks = p->p_uticks; 1496 ki->p_sticks = p->p_sticks; 1497 ki->p_iticks = p->p_iticks; 1498 1499 ki->p_tracep = PTRTOINT64(p->p_tracep); 1500 ki->p_traceflag = p->p_traceflag; 1501 1502 ki->p_holdcnt = p->p_holdcnt; 1503 1504 memcpy(&ki->p_siglist, &p->p_siglist, sizeof(ki_sigset_t)); 1505 memcpy(&ki->p_sigmask, &p->p_sigmask, sizeof(ki_sigset_t)); 1506 memcpy(&ki->p_sigignore, &p->p_sigignore, sizeof(ki_sigset_t)); 1507 memcpy(&ki->p_sigcatch, &p->p_sigcatch, sizeof(ki_sigset_t)); 1508 1509 ki->p_stat = p->p_stat; 1510 ki->p_priority = p->p_priority; 1511 ki->p_usrpri = p->p_usrpri; 1512 ki->p_nice = p->p_nice; 1513 1514 ki->p_xstat = p->p_xstat; 1515 ki->p_acflag = p->p_acflag; 1516 1517 strncpy(ki->p_comm, p->p_comm, 1518 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1519 1520 if (p->p_wmesg) 1521 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1522 ki->p_wchan = PTRTOINT64(p->p_wchan); 1523 1524 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1525 1526 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1527 ki->p_vm_rssize = 0; 1528 ki->p_vm_tsize = 0; 1529 ki->p_vm_dsize = 0; 1530 ki->p_vm_ssize = 0; 1531 } else { 1532 struct vmspace *vm = p->p_vmspace; 1533 1534 ki->p_vm_rssize = vm_resident_count(vm); 1535 ki->p_vm_tsize = vm->vm_tsize; 1536 ki->p_vm_dsize = vm->vm_dsize; 1537 ki->p_vm_ssize = vm->vm_ssize; 1538 } 1539 1540 if (p->p_session->s_ttyvp) 1541 ki->p_eflag |= EPROC_CTTY; 1542 if (SESS_LEADER(p)) 1543 ki->p_eflag |= EPROC_SLEADER; 1544 1545 /* XXX Is this double check necessary? */ 1546 if (P_ZOMBIE(p) || p->p_addr == NULL) { 1547 ki->p_uvalid = 0; 1548 } else { 1549 ki->p_uvalid = 1; 1550 1551 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1552 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1553 1554 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1555 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1556 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1557 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1558 1559 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1560 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1561 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1562 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1563 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1564 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1565 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1566 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1567 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1568 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1569 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1570 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1571 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1572 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1573 1574 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1575 p->p_stats->p_cru.ru_stime.tv_sec; 1576 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1577 p->p_stats->p_cru.ru_stime.tv_usec; 1578 } 1579 } 1580 1581 int 1582 sysctl_procargs(name, namelen, where, sizep, up) 1583 int *name; 1584 u_int namelen; 1585 void *where; 1586 size_t *sizep; 1587 struct proc *up; 1588 { 1589 struct ps_strings pss; 1590 struct proc *p; 1591 size_t len, upper_bound, xlen; 1592 struct uio auio; 1593 struct iovec aiov; 1594 vaddr_t argv; 1595 pid_t pid; 1596 int nargv, type, error, i; 1597 char *arg; 1598 char *tmp; 1599 1600 if (namelen != 2) 1601 return (EINVAL); 1602 pid = name[0]; 1603 type = name[1]; 1604 1605 switch (type) { 1606 case KERN_PROC_ARGV: 1607 case KERN_PROC_NARGV: 1608 case KERN_PROC_ENV: 1609 case KERN_PROC_NENV: 1610 /* ok */ 1611 break; 1612 default: 1613 return (EINVAL); 1614 } 1615 1616 /* check pid */ 1617 if ((p = pfind(pid)) == NULL) 1618 return (EINVAL); 1619 1620 /* only root or same user change look at the environment */ 1621 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1622 if (up->p_ucred->cr_uid != 0) { 1623 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1624 up->p_cred->p_ruid != p->p_cred->p_svuid) 1625 return (EPERM); 1626 } 1627 } 1628 1629 if (sizep != NULL && where == NULL) { 1630 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1631 *sizep = sizeof (int); 1632 else 1633 *sizep = ARG_MAX; /* XXX XXX XXX */ 1634 return (0); 1635 } 1636 if (where == NULL || sizep == NULL) 1637 return (EINVAL); 1638 1639 /* 1640 * Zombies don't have a stack, so we can't read their psstrings. 1641 * System processes also don't have a user stack. 1642 */ 1643 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1644 return (EINVAL); 1645 1646 /* 1647 * Lock the process down in memory. 1648 */ 1649 /* XXXCDC: how should locking work here? */ 1650 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1651 return (EFAULT); 1652 PHOLD(p); 1653 p->p_vmspace->vm_refcnt++; /* XXX */ 1654 1655 /* 1656 * Allocate a temporary buffer to hold the arguments. 1657 */ 1658 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1659 1660 /* 1661 * Read in the ps_strings structure. 1662 */ 1663 aiov.iov_base = &pss; 1664 aiov.iov_len = sizeof(pss); 1665 auio.uio_iov = &aiov; 1666 auio.uio_iovcnt = 1; 1667 auio.uio_offset = (vaddr_t)p->p_psstr; 1668 auio.uio_resid = sizeof(pss); 1669 auio.uio_segflg = UIO_SYSSPACE; 1670 auio.uio_rw = UIO_READ; 1671 auio.uio_procp = NULL; 1672 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1673 if (error) 1674 goto done; 1675 1676 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1677 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1678 else 1679 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1680 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1681 error = copyout(&nargv, where, sizeof(nargv)); 1682 *sizep = sizeof(nargv); 1683 goto done; 1684 } 1685 /* 1686 * Now read the address of the argument vector. 1687 */ 1688 switch (type) { 1689 case KERN_PROC_ARGV: 1690 /* XXX compat32 stuff here */ 1691 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1692 break; 1693 case KERN_PROC_ENV: 1694 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1695 break; 1696 default: 1697 return (EINVAL); 1698 } 1699 auio.uio_offset = (off_t)(long)tmp; 1700 aiov.iov_base = &argv; 1701 aiov.iov_len = sizeof(argv); 1702 auio.uio_iov = &aiov; 1703 auio.uio_iovcnt = 1; 1704 auio.uio_resid = sizeof(argv); 1705 auio.uio_segflg = UIO_SYSSPACE; 1706 auio.uio_rw = UIO_READ; 1707 auio.uio_procp = NULL; 1708 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1709 if (error) 1710 goto done; 1711 1712 /* 1713 * Now copy in the actual argument vector, one page at a time, 1714 * since we don't know how long the vector is (though, we do 1715 * know how many NUL-terminated strings are in the vector). 1716 */ 1717 len = 0; 1718 upper_bound = *sizep; 1719 for (; nargv != 0 && len < upper_bound; len += xlen) { 1720 aiov.iov_base = arg; 1721 aiov.iov_len = PAGE_SIZE; 1722 auio.uio_iov = &aiov; 1723 auio.uio_iovcnt = 1; 1724 auio.uio_offset = argv + len; 1725 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1726 auio.uio_resid = xlen; 1727 auio.uio_segflg = UIO_SYSSPACE; 1728 auio.uio_rw = UIO_READ; 1729 auio.uio_procp = NULL; 1730 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1731 if (error) 1732 goto done; 1733 1734 for (i = 0; i < xlen && nargv != 0; i++) { 1735 if (arg[i] == '\0') 1736 nargv--; /* one full string */ 1737 } 1738 1739 /* make sure we don't copyout past the end of the user's buffer */ 1740 if (len + i > upper_bound) 1741 i = upper_bound - len; 1742 1743 error = copyout(arg, (char *)where + len, i); 1744 if (error) 1745 break; 1746 1747 if (nargv == 0) { 1748 len += i; 1749 break; 1750 } 1751 } 1752 *sizep = len; 1753 1754 done: 1755 PRELE(p); 1756 uvmspace_free(p->p_vmspace); 1757 1758 free(arg, M_TEMP); 1759 return (error); 1760 } 1761
Indexes created Wed Sep 24 05:09:52 GMT 2025