kern_sysctl.c revision 1.71
1 /* $NetBSD: kern_sysctl.c,v 1.71 2000/06/13 01:27:00 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_doeproc __P((int *, u_int, void *, size_t *)); 106 static void fill_kproc2 __P((struct proc *, struct kinfo_proc2 *)); 107 static int sysctl_procargs __P((int *, u_int, void *, size_t *, struct proc *)); 108 109 int 110 sys___sysctl(p, v, retval) 111 struct proc *p; 112 void *v; 113 register_t *retval; 114 { 115 struct sys___sysctl_args /* { 116 syscallarg(int *) name; 117 syscallarg(u_int) namelen; 118 syscallarg(void *) old; 119 syscallarg(size_t *) oldlenp; 120 syscallarg(void *) new; 121 syscallarg(size_t) newlen; 122 } */ *uap = v; 123 int error, dolock = 1; 124 size_t savelen = 0, oldlen = 0; 125 sysctlfn *fn; 126 int name[CTL_MAXNAME]; 127 size_t *oldlenp; 128 129 /* 130 * all top-level sysctl names are non-terminal 131 */ 132 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 133 return (EINVAL); 134 error = copyin(SCARG(uap, name), &name, 135 SCARG(uap, namelen) * sizeof(int)); 136 if (error) 137 return (error); 138 139 /* 140 * For all but CTL_PROC, must be root to change a value. 141 * For CTL_PROC, must be root, or owner of the proc (and not suid), 142 * this is checked in proc_sysctl() (once we know the targer proc). 143 */ 144 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 145 (error = suser(p->p_ucred, &p->p_acflag))) 146 return error; 147 148 switch (name[0]) { 149 case CTL_KERN: 150 fn = kern_sysctl; 151 if (name[2] != KERN_VNODE) /* XXX */ 152 dolock = 0; 153 break; 154 case CTL_HW: 155 fn = hw_sysctl; 156 break; 157 case CTL_VM: 158 fn = uvm_sysctl; 159 break; 160 case CTL_NET: 161 fn = net_sysctl; 162 break; 163 case CTL_VFS: 164 fn = vfs_sysctl; 165 break; 166 case CTL_MACHDEP: 167 fn = cpu_sysctl; 168 break; 169 #ifdef DEBUG 170 case CTL_DEBUG: 171 fn = debug_sysctl; 172 break; 173 #endif 174 #ifdef DDB 175 case CTL_DDB: 176 fn = ddb_sysctl; 177 break; 178 #endif 179 case CTL_PROC: 180 fn = proc_sysctl; 181 break; 182 default: 183 return (EOPNOTSUPP); 184 } 185 186 oldlenp = SCARG(uap, oldlenp); 187 if (oldlenp) { 188 if ((error = copyin(oldlenp, &oldlen, sizeof(oldlen)))) 189 return (error); 190 oldlenp = &oldlen; 191 } 192 if (SCARG(uap, old) != NULL) { 193 if (!uvm_useracc(SCARG(uap, old), oldlen, B_WRITE)) 194 return (EFAULT); 195 while (memlock.sl_lock) { 196 memlock.sl_want = 1; 197 (void) tsleep(&memlock, PRIBIO+1, "memlock", 0); 198 memlock.sl_locked++; 199 } 200 memlock.sl_lock = 1; 201 if (dolock) { 202 /* 203 * XXX Um, this is kind of evil. What should we 204 * XXX be passing here? 205 */ 206 if (uvm_vslock(p, SCARG(uap, old), oldlen, 207 VM_PROT_NONE) != KERN_SUCCESS) { 208 memlock.sl_lock = 0; 209 if (memlock.sl_want) { 210 memlock.sl_want = 0; 211 wakeup((caddr_t)&memlock); 212 return (EFAULT); 213 } 214 } 215 } 216 savelen = oldlen; 217 } 218 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 219 oldlenp, SCARG(uap, new), SCARG(uap, newlen), p); 220 if (SCARG(uap, old) != NULL) { 221 if (dolock) 222 uvm_vsunlock(p, SCARG(uap, old), savelen); 223 memlock.sl_lock = 0; 224 if (memlock.sl_want) { 225 memlock.sl_want = 0; 226 wakeup((caddr_t)&memlock); 227 } 228 } 229 if (error) 230 return (error); 231 if (SCARG(uap, oldlenp)) 232 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 233 return (error); 234 } 235 236 /* 237 * Attributes stored in the kernel. 238 */ 239 char hostname[MAXHOSTNAMELEN]; 240 int hostnamelen; 241 char domainname[MAXHOSTNAMELEN]; 242 int domainnamelen; 243 long hostid; 244 #ifdef INSECURE 245 int securelevel = -1; 246 #else 247 int securelevel = 0; 248 #endif 249 #ifdef DEFCORENAME 250 char defcorename[MAXPATHLEN] = DEFCORENAME; 251 int defcorenamelen = sizeof(DEFCORENAME); 252 #else 253 char defcorename[MAXPATHLEN] = "%n.core"; 254 int defcorenamelen = sizeof("%n.core"); 255 #endif 256 extern int kern_logsigexit; 257 extern fixpt_t ccpu; 258 259 /* 260 * kernel related system variables. 261 */ 262 int 263 kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 264 int *name; 265 u_int namelen; 266 void *oldp; 267 size_t *oldlenp; 268 void *newp; 269 size_t newlen; 270 struct proc *p; 271 { 272 int error, level, inthostid; 273 int old_autonicetime; 274 int old_vnodes; 275 276 /* All sysctl names at this level, except for a few, are terminal. */ 277 switch (name[0]) { 278 case KERN_PROC: 279 case KERN_PROC2: 280 case KERN_PROF: 281 case KERN_MBUF: 282 case KERN_PROC_ARGS: 283 case KERN_SYSVIPC_INFO: 284 /* Not terminal. */ 285 break; 286 default: 287 if (namelen != 1) 288 return (ENOTDIR); /* overloaded */ 289 } 290 291 switch (name[0]) { 292 case KERN_OSTYPE: 293 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 294 case KERN_OSRELEASE: 295 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 296 case KERN_OSREV: 297 return (sysctl_rdint(oldp, oldlenp, newp, NetBSD)); 298 case KERN_VERSION: 299 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 300 case KERN_MAXVNODES: 301 old_vnodes = desiredvnodes; 302 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 303 if (old_vnodes > desiredvnodes) { 304 desiredvnodes = old_vnodes; 305 return (EINVAL); 306 } 307 return (error); 308 case KERN_MAXPROC: 309 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc)); 310 case KERN_MAXFILES: 311 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 312 case KERN_ARGMAX: 313 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 314 case KERN_SECURELVL: 315 level = securelevel; 316 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 317 newp == NULL) 318 return (error); 319 if (level < securelevel && p->p_pid != 1) 320 return (EPERM); 321 securelevel = level; 322 return (0); 323 case KERN_HOSTNAME: 324 error = sysctl_string(oldp, oldlenp, newp, newlen, 325 hostname, sizeof(hostname)); 326 if (newp && !error) 327 hostnamelen = newlen; 328 return (error); 329 case KERN_DOMAINNAME: 330 error = sysctl_string(oldp, oldlenp, newp, newlen, 331 domainname, sizeof(domainname)); 332 if (newp && !error) 333 domainnamelen = newlen; 334 return (error); 335 case KERN_HOSTID: 336 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 337 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 338 hostid = inthostid; 339 return (error); 340 case KERN_CLOCKRATE: 341 return (sysctl_clockrate(oldp, oldlenp)); 342 case KERN_BOOTTIME: 343 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 344 sizeof(struct timeval))); 345 case KERN_VNODE: 346 return (sysctl_vnode(oldp, oldlenp, p)); 347 case KERN_PROC: 348 case KERN_PROC2: 349 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 350 case KERN_PROC_ARGS: 351 return (sysctl_procargs(name + 1, namelen - 1, 352 oldp, oldlenp, p)); 353 case KERN_FILE: 354 return (sysctl_file(oldp, oldlenp)); 355 #ifdef GPROF 356 case KERN_PROF: 357 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 358 newp, newlen)); 359 #endif 360 case KERN_POSIX1: 361 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 362 case KERN_NGROUPS: 363 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 364 case KERN_JOB_CONTROL: 365 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 366 case KERN_SAVED_IDS: 367 #ifdef _POSIX_SAVED_IDS 368 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 369 #else 370 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 371 #endif 372 case KERN_MAXPARTITIONS: 373 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 374 case KERN_RAWPARTITION: 375 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 376 #ifdef NTP 377 case KERN_NTPTIME: 378 return (sysctl_ntptime(oldp, oldlenp)); 379 #endif 380 case KERN_AUTONICETIME: 381 old_autonicetime = autonicetime; 382 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 383 if (autonicetime < 0) 384 autonicetime = old_autonicetime; 385 return (error); 386 case KERN_AUTONICEVAL: 387 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 388 if (autoniceval < PRIO_MIN) 389 autoniceval = PRIO_MIN; 390 if (autoniceval > PRIO_MAX) 391 autoniceval = PRIO_MAX; 392 return (error); 393 case KERN_RTC_OFFSET: 394 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 395 case KERN_ROOT_DEVICE: 396 return (sysctl_rdstring(oldp, oldlenp, newp, 397 root_device->dv_xname)); 398 case KERN_MSGBUFSIZE: 399 /* 400 * deal with cases where the message buffer has 401 * become corrupted. 402 */ 403 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 404 msgbufenabled = 0; 405 return (ENXIO); 406 } 407 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 408 case KERN_FSYNC: 409 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 410 case KERN_SYSVMSG: 411 #ifdef SYSVMSG 412 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 413 #else 414 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 415 #endif 416 case KERN_SYSVSEM: 417 #ifdef SYSVSEM 418 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 419 #else 420 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 421 #endif 422 case KERN_SYSVSHM: 423 #ifdef SYSVSHM 424 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 425 #else 426 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 427 #endif 428 case KERN_DEFCORENAME: 429 if (newp && newlen < 1) 430 return (EINVAL); 431 error = sysctl_string(oldp, oldlenp, newp, newlen, 432 defcorename, sizeof(defcorename)); 433 if (newp && !error) 434 defcorenamelen = newlen; 435 return (error); 436 case KERN_SYNCHRONIZED_IO: 437 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 438 case KERN_IOV_MAX: 439 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 440 case KERN_MBUF: 441 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 442 newp, newlen)); 443 case KERN_MAPPED_FILES: 444 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 445 case KERN_MEMLOCK: 446 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 447 case KERN_MEMLOCK_RANGE: 448 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 449 case KERN_MEMORY_PROTECTION: 450 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 451 case KERN_LOGIN_NAME_MAX: 452 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 453 case KERN_LOGSIGEXIT: 454 return (sysctl_int(oldp, oldlenp, newp, newlen, 455 &kern_logsigexit)); 456 case KERN_FSCALE: 457 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 458 case KERN_CCPU: 459 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 460 case KERN_CP_TIME: 461 /* XXXSMP: WRONG! */ 462 return (sysctl_rdstruct(oldp, oldlenp, newp, 463 curcpu()->ci_schedstate.spc_cp_time, 464 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 465 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 466 case KERN_SYSVIPC_INFO: 467 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 468 #endif 469 default: 470 return (EOPNOTSUPP); 471 } 472 /* NOTREACHED */ 473 } 474 475 /* 476 * hardware related system variables. 477 */ 478 int 479 hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 480 int *name; 481 u_int namelen; 482 void *oldp; 483 size_t *oldlenp; 484 void *newp; 485 size_t newlen; 486 struct proc *p; 487 { 488 489 /* all sysctl names at this level are terminal */ 490 if (namelen != 1) 491 return (ENOTDIR); /* overloaded */ 492 493 switch (name[0]) { 494 case HW_MACHINE: 495 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 496 case HW_MACHINE_ARCH: 497 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 498 case HW_MODEL: 499 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 500 case HW_NCPU: 501 return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */ 502 case HW_BYTEORDER: 503 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 504 case HW_PHYSMEM: 505 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 506 case HW_USERMEM: 507 return (sysctl_rdint(oldp, oldlenp, newp, 508 ctob(physmem - uvmexp.wired))); 509 case HW_PAGESIZE: 510 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 511 case HW_ALIGNBYTES: 512 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 513 default: 514 return (EOPNOTSUPP); 515 } 516 /* NOTREACHED */ 517 } 518 519 #ifdef DEBUG 520 /* 521 * Debugging related system variables. 522 */ 523 struct ctldebug debug0, debug1, debug2, debug3, debug4; 524 struct ctldebug debug5, debug6, debug7, debug8, debug9; 525 struct ctldebug debug10, debug11, debug12, debug13, debug14; 526 struct ctldebug debug15, debug16, debug17, debug18, debug19; 527 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 528 &debug0, &debug1, &debug2, &debug3, &debug4, 529 &debug5, &debug6, &debug7, &debug8, &debug9, 530 &debug10, &debug11, &debug12, &debug13, &debug14, 531 &debug15, &debug16, &debug17, &debug18, &debug19, 532 }; 533 int 534 debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 535 int *name; 536 u_int namelen; 537 void *oldp; 538 size_t *oldlenp; 539 void *newp; 540 size_t newlen; 541 struct proc *p; 542 { 543 struct ctldebug *cdp; 544 545 /* all sysctl names at this level are name and field */ 546 if (namelen != 2) 547 return (ENOTDIR); /* overloaded */ 548 cdp = debugvars[name[0]]; 549 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 550 return (EOPNOTSUPP); 551 switch (name[1]) { 552 case CTL_DEBUG_NAME: 553 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 554 case CTL_DEBUG_VALUE: 555 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 556 default: 557 return (EOPNOTSUPP); 558 } 559 /* NOTREACHED */ 560 } 561 #endif /* DEBUG */ 562 563 int 564 proc_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 565 int *name; 566 u_int namelen; 567 void *oldp; 568 size_t *oldlenp; 569 void *newp; 570 size_t newlen; 571 struct proc *p; 572 { 573 struct proc *ptmp = NULL; 574 const struct proclist_desc *pd; 575 int error = 0; 576 struct rlimit alim; 577 struct plimit *newplim; 578 char *tmps = NULL; 579 int i, curlen, len; 580 581 if (namelen < 2) 582 return EINVAL; 583 584 if (name[0] == PROC_CURPROC) { 585 ptmp = p; 586 } else { 587 proclist_lock_read(); 588 for (pd = proclists; pd->pd_list != NULL; pd++) { 589 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 590 ptmp = LIST_NEXT(ptmp, p_list)) { 591 /* Skip embryonic processes. */ 592 if (ptmp->p_stat == SIDL) 593 continue; 594 if (ptmp->p_pid == (pid_t)name[0]) 595 break; 596 } 597 if (ptmp != NULL) 598 break; 599 } 600 proclist_unlock_read(); 601 if (ptmp == NULL) 602 return(ESRCH); 603 if (p->p_ucred->cr_uid != 0) { 604 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 605 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 606 return EPERM; 607 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 608 return EPERM; /* sgid proc */ 609 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 610 if (p->p_ucred->cr_groups[i] == 611 ptmp->p_cred->p_rgid) 612 break; 613 } 614 if (i == p->p_ucred->cr_ngroups) 615 return EPERM; 616 } 617 } 618 if (name[1] == PROC_PID_CORENAME) { 619 if (namelen != 2) 620 return EINVAL; 621 /* 622 * Can't use sysctl_string() here because we may malloc a new 623 * area during the process, so we have to do it by hand. 624 */ 625 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 626 if (oldlenp && *oldlenp < curlen) { 627 if (!oldp) 628 *oldlenp = curlen; 629 return (ENOMEM); 630 } 631 if (newp) { 632 if (securelevel > 2) 633 return EPERM; 634 if (newlen > MAXPATHLEN) 635 return ENAMETOOLONG; 636 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 637 if (tmps == NULL) 638 return ENOMEM; 639 error = copyin(newp, tmps, newlen + 1); 640 tmps[newlen] = '\0'; 641 if (error) 642 goto cleanup; 643 /* Enforce to be either 'core' for end with '.core' */ 644 if (newlen < 4) { /* c.o.r.e */ 645 error = EINVAL; 646 goto cleanup; 647 } 648 len = newlen - 4; 649 if (len > 0) { 650 if (tmps[len - 1] != '.' && 651 tmps[len - 1] != '/') { 652 error = EINVAL; 653 goto cleanup; 654 } 655 } 656 if (strcmp(&tmps[len], "core") != 0) { 657 error = EINVAL; 658 goto cleanup; 659 } 660 } 661 if (oldp && oldlenp) { 662 *oldlenp = curlen; 663 error = copyout(ptmp->p_limit->pl_corename, oldp, 664 curlen); 665 } 666 if (newp && error == 0) { 667 /* if the 2 strings are identical, don't limcopy() */ 668 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 669 error = 0; 670 goto cleanup; 671 } 672 if (ptmp->p_limit->p_refcnt > 1 && 673 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 674 newplim = limcopy(ptmp->p_limit); 675 limfree(ptmp->p_limit); 676 ptmp->p_limit = newplim; 677 } else if (ptmp->p_limit->pl_corename != defcorename) { 678 free(ptmp->p_limit->pl_corename, M_TEMP); 679 } 680 ptmp->p_limit->pl_corename = tmps; 681 return (0); 682 } 683 cleanup: 684 if (tmps) 685 free(tmps, M_TEMP); 686 return (error); 687 } 688 if (name[1] == PROC_PID_LIMIT) { 689 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 690 return EINVAL; 691 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 692 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 693 error = sysctl_quad(oldp, oldlenp, newp, newlen, 694 &alim.rlim_max); 695 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 696 error = sysctl_quad(oldp, oldlenp, newp, newlen, 697 &alim.rlim_cur); 698 else 699 error = EINVAL; 700 701 if (error) 702 return error; 703 704 if (newp) 705 error = dosetrlimit(ptmp, p->p_cred, 706 name[2] - 1, &alim); 707 return error; 708 } 709 return (EINVAL); 710 } 711 712 /* 713 * Convenience macros. 714 */ 715 716 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 717 if (oldlenp) { \ 718 if (!oldp) \ 719 *oldlenp = len; \ 720 else { \ 721 if (*oldlenp < len) \ 722 return(ENOMEM); \ 723 *oldlenp = len; \ 724 error = copyout((caddr_t)valp, oldp, len); \ 725 } \ 726 } 727 728 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 729 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 730 731 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 732 if (newp && newlen != len) \ 733 return (EINVAL); 734 735 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 736 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 737 738 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 739 if (error == 0 && newp) \ 740 error = copyin(newp, valp, len); 741 742 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 743 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 744 745 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 746 if (oldlenp) { \ 747 len = strlen(str) + 1; \ 748 if (!oldp) \ 749 *oldlenp = len; \ 750 else { \ 751 if (*oldlenp < len) { \ 752 err2 = ENOMEM; \ 753 len = *oldlenp; \ 754 } else \ 755 *oldlenp = len; \ 756 error = copyout(str, oldp, len);\ 757 if (error == 0) \ 758 error = err2; \ 759 } \ 760 } 761 762 /* 763 * Validate parameters and get old / set new parameters 764 * for an integer-valued sysctl function. 765 */ 766 int 767 sysctl_int(oldp, oldlenp, newp, newlen, valp) 768 void *oldp; 769 size_t *oldlenp; 770 void *newp; 771 size_t newlen; 772 int *valp; 773 { 774 int error = 0; 775 776 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 777 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 778 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 779 780 return (error); 781 } 782 783 784 /* 785 * As above, but read-only. 786 */ 787 int 788 sysctl_rdint(oldp, oldlenp, newp, val) 789 void *oldp; 790 size_t *oldlenp; 791 void *newp; 792 int val; 793 { 794 int error = 0; 795 796 if (newp) 797 return (EPERM); 798 799 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 800 801 return (error); 802 } 803 804 /* 805 * Validate parameters and get old / set new parameters 806 * for an quad-valued sysctl function. 807 */ 808 int 809 sysctl_quad(oldp, oldlenp, newp, newlen, valp) 810 void *oldp; 811 size_t *oldlenp; 812 void *newp; 813 size_t newlen; 814 quad_t *valp; 815 { 816 int error = 0; 817 818 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 819 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 820 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 821 822 return (error); 823 } 824 825 /* 826 * As above, but read-only. 827 */ 828 int 829 sysctl_rdquad(oldp, oldlenp, newp, val) 830 void *oldp; 831 size_t *oldlenp; 832 void *newp; 833 quad_t val; 834 { 835 int error = 0; 836 837 if (newp) 838 return (EPERM); 839 840 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 841 842 return (error); 843 } 844 845 /* 846 * Validate parameters and get old / set new parameters 847 * for a string-valued sysctl function. 848 */ 849 int 850 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 851 void *oldp; 852 size_t *oldlenp; 853 void *newp; 854 size_t newlen; 855 char *str; 856 int maxlen; 857 { 858 int len, error = 0, err2 = 0; 859 860 if (newp && newlen >= maxlen) 861 return (EINVAL); 862 863 SYSCTL_STRING_CORE(oldp, oldlenp, str); 864 865 if (error == 0 && newp) { 866 error = copyin(newp, str, newlen); 867 str[newlen] = 0; 868 } 869 return (error); 870 } 871 872 /* 873 * As above, but read-only. 874 */ 875 int 876 sysctl_rdstring(oldp, oldlenp, newp, str) 877 void *oldp; 878 size_t *oldlenp; 879 void *newp; 880 char *str; 881 { 882 int len, error = 0, err2 = 0; 883 884 if (newp) 885 return (EPERM); 886 887 SYSCTL_STRING_CORE(oldp, oldlenp, str); 888 889 return (error); 890 } 891 892 /* 893 * Validate parameters and get old / set new parameters 894 * for a structure oriented sysctl function. 895 */ 896 int 897 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 898 void *oldp; 899 size_t *oldlenp; 900 void *newp; 901 size_t newlen; 902 void *sp; 903 int len; 904 { 905 int error = 0; 906 907 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 908 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 909 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 910 911 return (error); 912 } 913 914 /* 915 * Validate parameters and get old parameters 916 * for a structure oriented sysctl function. 917 */ 918 int 919 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 920 void *oldp; 921 size_t *oldlenp; 922 void *newp, *sp; 923 int len; 924 { 925 int error = 0; 926 927 if (newp) 928 return (EPERM); 929 930 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 931 932 return (error); 933 } 934 935 /* 936 * Get file structures. 937 */ 938 static int 939 sysctl_file(vwhere, sizep) 940 void *vwhere; 941 size_t *sizep; 942 { 943 int buflen, error; 944 struct file *fp; 945 char *start, *where; 946 947 start = where = vwhere; 948 buflen = *sizep; 949 if (where == NULL) { 950 /* 951 * overestimate by 10 files 952 */ 953 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 954 return (0); 955 } 956 957 /* 958 * first copyout filehead 959 */ 960 if (buflen < sizeof(filehead)) { 961 *sizep = 0; 962 return (0); 963 } 964 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 965 if (error) 966 return (error); 967 buflen -= sizeof(filehead); 968 where += sizeof(filehead); 969 970 /* 971 * followed by an array of file structures 972 */ 973 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 974 if (buflen < sizeof(struct file)) { 975 *sizep = where - start; 976 return (ENOMEM); 977 } 978 error = copyout((caddr_t)fp, where, sizeof(struct file)); 979 if (error) 980 return (error); 981 buflen -= sizeof(struct file); 982 where += sizeof(struct file); 983 } 984 *sizep = where - start; 985 return (0); 986 } 987 988 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 989 #define FILL_PERM(src, dst) do { \ 990 (dst)._key = (src)._key; \ 991 (dst).uid = (src).uid; \ 992 (dst).gid = (src).gid; \ 993 (dst).cuid = (src).cuid; \ 994 (dst).cgid = (src).cgid; \ 995 (dst).mode = (src).mode; \ 996 (dst)._seq = (src)._seq; \ 997 } while (0); 998 #define FILL_MSG(src, dst) do { \ 999 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1000 (dst).msg_qnum = (src).msg_qnum; \ 1001 (dst).msg_qbytes = (src).msg_qbytes; \ 1002 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1003 (dst).msg_lspid = (src).msg_lspid; \ 1004 (dst).msg_lrpid = (src).msg_lrpid; \ 1005 (dst).msg_stime = (src).msg_stime; \ 1006 (dst).msg_rtime = (src).msg_rtime; \ 1007 (dst).msg_ctime = (src).msg_ctime; \ 1008 } while (0) 1009 #define FILL_SEM(src, dst) do { \ 1010 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1011 (dst).sem_nsems = (src).sem_nsems; \ 1012 (dst).sem_otime = (src).sem_otime; \ 1013 (dst).sem_ctime = (src).sem_ctime; \ 1014 } while (0) 1015 #define FILL_SHM(src, dst) do { \ 1016 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1017 (dst).shm_segsz = (src).shm_segsz; \ 1018 (dst).shm_lpid = (src).shm_lpid; \ 1019 (dst).shm_cpid = (src).shm_cpid; \ 1020 (dst).shm_atime = (src).shm_atime; \ 1021 (dst).shm_dtime = (src).shm_dtime; \ 1022 (dst).shm_ctime = (src).shm_ctime; \ 1023 (dst).shm_nattch = (src).shm_nattch; \ 1024 } while (0) 1025 1026 static int 1027 sysctl_sysvipc(name, namelen, where, sizep) 1028 int *name; 1029 u_int namelen; 1030 void *where; 1031 size_t *sizep; 1032 { 1033 struct msg_sysctl_info *msgsi; 1034 struct sem_sysctl_info *semsi; 1035 struct shm_sysctl_info *shmsi; 1036 size_t infosize, dssize, tsize, buflen; 1037 void *buf = NULL, *buf2; 1038 char *start; 1039 int32_t nds; 1040 int i, error, ret; 1041 1042 if (namelen != 1) 1043 return (EINVAL); 1044 1045 start = where; 1046 buflen = *sizep; 1047 1048 switch (*name) { 1049 case KERN_SYSVIPC_MSG_INFO: 1050 #ifdef SYSVMSG 1051 infosize = sizeof(msgsi->msginfo); 1052 nds = msginfo.msgmni; 1053 dssize = sizeof(msgsi->msgids[0]); 1054 break; 1055 #else 1056 return (EINVAL); 1057 #endif 1058 case KERN_SYSVIPC_SEM_INFO: 1059 #ifdef SYSVSEM 1060 infosize = sizeof(semsi->seminfo); 1061 nds = seminfo.semmni; 1062 dssize = sizeof(semsi->semids[0]); 1063 break; 1064 #else 1065 return (EINVAL); 1066 #endif 1067 case KERN_SYSVIPC_SHM_INFO: 1068 #ifdef SYSVSHM 1069 infosize = sizeof(shmsi->shminfo); 1070 nds = shminfo.shmmni; 1071 dssize = sizeof(shmsi->shmids[0]); 1072 break; 1073 #else 1074 return (EINVAL); 1075 #endif 1076 default: 1077 return (EINVAL); 1078 } 1079 /* 1080 * Round infosize to 64 bit boundary if requesting more than just 1081 * the info structure or getting the total data size. 1082 */ 1083 if (where == NULL || *sizep > infosize) 1084 infosize = ((infosize + 7) / 8) * 8; 1085 tsize = infosize + nds * dssize; 1086 1087 /* Return just the total size required. */ 1088 if (where == NULL) { 1089 *sizep = tsize; 1090 return (0); 1091 } 1092 1093 /* Not enough room for even the info struct. */ 1094 if (buflen < infosize) { 1095 *sizep = 0; 1096 return (ENOMEM); 1097 } 1098 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1099 memset(buf, 0, min(tsize, buflen)); 1100 1101 switch (*name) { 1102 case KERN_SYSVIPC_MSG_INFO: 1103 msgsi = (struct msg_sysctl_info *)buf; 1104 buf2 = &msgsi->msgids[0]; 1105 msgsi->msginfo = msginfo; 1106 break; 1107 case KERN_SYSVIPC_SEM_INFO: 1108 semsi = (struct sem_sysctl_info *)buf; 1109 buf2 = &semsi->semids[0]; 1110 semsi->seminfo = seminfo; 1111 break; 1112 case KERN_SYSVIPC_SHM_INFO: 1113 shmsi = (struct shm_sysctl_info *)buf; 1114 buf2 = &shmsi->shmids[0]; 1115 shmsi->shminfo = shminfo; 1116 break; 1117 } 1118 buflen -= infosize; 1119 1120 ret = 0; 1121 if (buflen > 0) { 1122 /* Fill in the IPC data structures. */ 1123 for (i = 0; i < nds; i++) { 1124 if (buflen < dssize) { 1125 ret = ENOMEM; 1126 break; 1127 } 1128 switch (*name) { 1129 case KERN_SYSVIPC_MSG_INFO: 1130 FILL_MSG(msqids[i], msgsi->msgids[i]); 1131 break; 1132 case KERN_SYSVIPC_SEM_INFO: 1133 FILL_SEM(sema[i], semsi->semids[i]); 1134 break; 1135 case KERN_SYSVIPC_SHM_INFO: 1136 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1137 break; 1138 } 1139 buflen -= dssize; 1140 } 1141 } 1142 *sizep -= buflen; 1143 error = copyout(buf, start, *sizep); 1144 /* If copyout succeeded, use return code set earlier. */ 1145 if (error == 0) 1146 error = ret; 1147 if (buf) 1148 free(buf, M_TEMP); 1149 return (error); 1150 } 1151 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1152 1153 /* 1154 * try over estimating by 5 procs 1155 */ 1156 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1157 1158 static int 1159 sysctl_doeproc(name, namelen, vwhere, sizep) 1160 int *name; 1161 u_int namelen; 1162 void *vwhere; 1163 size_t *sizep; 1164 { 1165 struct eproc eproc; 1166 struct kinfo_proc2 kproc2; 1167 struct kinfo_proc *dp; 1168 struct proc *p; 1169 const struct proclist_desc *pd; 1170 char *where, *dp2; 1171 int type, op, arg, elem_size, elem_count; 1172 int buflen, needed, error; 1173 1174 dp = vwhere; 1175 dp2 = where = vwhere; 1176 buflen = where != NULL ? *sizep : 0; 1177 error = needed = 0; 1178 type = name[0]; 1179 1180 if (type == KERN_PROC) { 1181 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1182 return (EINVAL); 1183 op = name[1]; 1184 if (op != KERN_PROC_ALL) 1185 arg = name[2]; 1186 } else { 1187 if (namelen != 5) 1188 return (EINVAL); 1189 op = name[1]; 1190 arg = name[2]; 1191 elem_size = name[3]; 1192 elem_count = name[4]; 1193 } 1194 1195 proclist_lock_read(); 1196 1197 pd = proclists; 1198 again: 1199 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1200 /* 1201 * Skip embryonic processes. 1202 */ 1203 if (p->p_stat == SIDL) 1204 continue; 1205 /* 1206 * TODO - make more efficient (see notes below). 1207 * do by session. 1208 */ 1209 switch (op) { 1210 1211 case KERN_PROC_PID: 1212 /* could do this with just a lookup */ 1213 if (p->p_pid != (pid_t)arg) 1214 continue; 1215 break; 1216 1217 case KERN_PROC_PGRP: 1218 /* could do this by traversing pgrp */ 1219 if (p->p_pgrp->pg_id != (pid_t)arg) 1220 continue; 1221 break; 1222 1223 case KERN_PROC_SESSION: 1224 if (p->p_session->s_sid != (pid_t)arg) 1225 continue; 1226 break; 1227 1228 case KERN_PROC_TTY: 1229 if (arg == KERN_PROC_TTY_REVOKE) { 1230 if ((p->p_flag & P_CONTROLT) == 0 || 1231 p->p_session->s_ttyp == NULL || 1232 p->p_session->s_ttyvp != NULL) 1233 continue; 1234 } else if ((p->p_flag & P_CONTROLT) == 0 || 1235 p->p_session->s_ttyp == NULL) { 1236 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1237 continue; 1238 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1239 continue; 1240 break; 1241 1242 case KERN_PROC_UID: 1243 if (p->p_ucred->cr_uid != (uid_t)arg) 1244 continue; 1245 break; 1246 1247 case KERN_PROC_RUID: 1248 if (p->p_cred->p_ruid != (uid_t)arg) 1249 continue; 1250 break; 1251 1252 case KERN_PROC_GID: 1253 if (p->p_ucred->cr_gid != (uid_t)arg) 1254 continue; 1255 break; 1256 1257 case KERN_PROC_RGID: 1258 if (p->p_cred->p_rgid != (uid_t)arg) 1259 continue; 1260 break; 1261 1262 case KERN_PROC_ALL: 1263 /* allow everything */ 1264 break; 1265 1266 default: 1267 error = EINVAL; 1268 goto cleanup; 1269 } 1270 if (type == KERN_PROC) { 1271 if (buflen >= sizeof(struct kinfo_proc)) { 1272 fill_eproc(p, &eproc); 1273 error = copyout((caddr_t)p, &dp->kp_proc, 1274 sizeof(struct proc)); 1275 if (error) 1276 goto cleanup; 1277 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1278 sizeof(eproc)); 1279 if (error) 1280 goto cleanup; 1281 dp++; 1282 buflen -= sizeof(struct kinfo_proc); 1283 } 1284 needed += sizeof(struct kinfo_proc); 1285 } else { /* KERN_PROC2 */ 1286 if (buflen >= elem_size && elem_count > 0) { 1287 fill_kproc2(p, &kproc2); 1288 /* 1289 * Copy out elem_size, but not larger than 1290 * the size of a struct kinfo_proc2. 1291 */ 1292 error = copyout(&kproc2, dp2, 1293 min(sizeof(kproc2), elem_size)); 1294 if (error) 1295 goto cleanup; 1296 dp2 += elem_size; 1297 buflen -= elem_size; 1298 elem_count--; 1299 } 1300 needed += elem_size; 1301 } 1302 } 1303 pd++; 1304 if (pd->pd_list != NULL) 1305 goto again; 1306 proclist_unlock_read(); 1307 1308 if (where != NULL) { 1309 if (type == KERN_PROC) 1310 *sizep = (caddr_t)dp - where; 1311 else 1312 *sizep = dp2 - where; 1313 if (needed > *sizep) 1314 return (ENOMEM); 1315 } else { 1316 needed += KERN_PROCSLOP; 1317 *sizep = needed; 1318 } 1319 return (0); 1320 cleanup: 1321 proclist_unlock_read(); 1322 return (error); 1323 } 1324 1325 /* 1326 * Fill in an eproc structure for the specified process. 1327 */ 1328 void 1329 fill_eproc(p, ep) 1330 struct proc *p; 1331 struct eproc *ep; 1332 { 1333 struct tty *tp; 1334 1335 ep->e_paddr = p; 1336 ep->e_sess = p->p_session; 1337 ep->e_pcred = *p->p_cred; 1338 ep->e_ucred = *p->p_ucred; 1339 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1340 ep->e_vm.vm_rssize = 0; 1341 ep->e_vm.vm_tsize = 0; 1342 ep->e_vm.vm_dsize = 0; 1343 ep->e_vm.vm_ssize = 0; 1344 /* ep->e_vm.vm_pmap = XXX; */ 1345 } else { 1346 struct vmspace *vm = p->p_vmspace; 1347 1348 ep->e_vm.vm_rssize = vm_resident_count(vm); 1349 ep->e_vm.vm_tsize = vm->vm_tsize; 1350 ep->e_vm.vm_dsize = vm->vm_dsize; 1351 ep->e_vm.vm_ssize = vm->vm_ssize; 1352 } 1353 if (p->p_pptr) 1354 ep->e_ppid = p->p_pptr->p_pid; 1355 else 1356 ep->e_ppid = 0; 1357 ep->e_pgid = p->p_pgrp->pg_id; 1358 ep->e_sid = ep->e_sess->s_sid; 1359 ep->e_jobc = p->p_pgrp->pg_jobc; 1360 if ((p->p_flag & P_CONTROLT) && 1361 (tp = ep->e_sess->s_ttyp)) { 1362 ep->e_tdev = tp->t_dev; 1363 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1364 ep->e_tsess = tp->t_session; 1365 } else 1366 ep->e_tdev = NODEV; 1367 if (p->p_wmesg) 1368 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1369 ep->e_xsize = ep->e_xrssize = 0; 1370 ep->e_xccount = ep->e_xswrss = 0; 1371 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1372 if (SESS_LEADER(p)) 1373 ep->e_flag |= EPROC_SLEADER; 1374 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1375 } 1376 1377 /* 1378 * Fill in an eproc structure for the specified process. 1379 */ 1380 static void 1381 fill_kproc2(p, ki) 1382 struct proc *p; 1383 struct kinfo_proc2 *ki; 1384 { 1385 struct tty *tp; 1386 1387 memset(ki, 0, sizeof(*ki)); 1388 1389 ki->p_forw = PTRTOINT64(p->p_forw); 1390 ki->p_back = PTRTOINT64(p->p_back); 1391 ki->p_paddr = PTRTOINT64(p); 1392 1393 ki->p_addr = PTRTOINT64(p->p_addr); 1394 ki->p_fd = PTRTOINT64(p->p_fd); 1395 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1396 ki->p_stats = PTRTOINT64(p->p_stats); 1397 ki->p_limit = PTRTOINT64(p->p_limit); 1398 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1399 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1400 ki->p_sess = PTRTOINT64(p->p_session); 1401 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1402 ki->p_ru = PTRTOINT64(p->p_ru); 1403 1404 ki->p_eflag = 0; 1405 ki->p_exitsig = p->p_exitsig; 1406 ki->p_flag = p->p_flag; 1407 1408 ki->p_pid = p->p_pid; 1409 if (p->p_pptr) 1410 ki->p_ppid = p->p_pptr->p_pid; 1411 else 1412 ki->p_ppid = 0; 1413 ki->p_sid = p->p_session->s_sid; 1414 ki->p__pgid = p->p_pgrp->pg_id; 1415 1416 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1417 1418 ki->p_uid = p->p_ucred->cr_uid; 1419 ki->p_ruid = p->p_cred->p_ruid; 1420 ki->p_gid = p->p_ucred->cr_gid; 1421 ki->p_rgid = p->p_cred->p_rgid; 1422 1423 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1424 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1425 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1426 1427 ki->p_jobc = p->p_pgrp->pg_jobc; 1428 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1429 ki->p_tdev = tp->t_dev; 1430 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1431 ki->p_tsess = PTRTOINT64(tp->t_session); 1432 } else { 1433 ki->p_tdev = NODEV; 1434 } 1435 1436 ki->p_estcpu = p->p_estcpu; 1437 ki->p_rtime_sec = p->p_rtime.tv_sec; 1438 ki->p_rtime_usec = p->p_rtime.tv_usec; 1439 ki->p_cpticks = p->p_cpticks; 1440 ki->p_pctcpu = p->p_pctcpu; 1441 ki->p_swtime = p->p_swtime; 1442 ki->p_slptime = p->p_slptime; 1443 if (p->p_stat == SONPROC) { 1444 KDASSERT(p->p_cpu != NULL); 1445 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1446 } else 1447 ki->p_schedflags = 0; 1448 1449 ki->p_uticks = p->p_uticks; 1450 ki->p_sticks = p->p_sticks; 1451 ki->p_iticks = p->p_iticks; 1452 1453 ki->p_tracep = PTRTOINT64(p->p_tracep); 1454 ki->p_traceflag = p->p_traceflag; 1455 1456 ki->p_holdcnt = p->p_holdcnt; 1457 1458 memcpy(&ki->p_siglist, &p->p_siglist, sizeof(ki_sigset_t)); 1459 memcpy(&ki->p_sigmask, &p->p_sigmask, sizeof(ki_sigset_t)); 1460 memcpy(&ki->p_sigignore, &p->p_sigignore, sizeof(ki_sigset_t)); 1461 memcpy(&ki->p_sigcatch, &p->p_sigcatch, sizeof(ki_sigset_t)); 1462 1463 ki->p_stat = p->p_stat; 1464 ki->p_priority = p->p_priority; 1465 ki->p_usrpri = p->p_usrpri; 1466 ki->p_nice = p->p_nice; 1467 1468 ki->p_xstat = p->p_xstat; 1469 ki->p_acflag = p->p_acflag; 1470 1471 strncpy(ki->p_comm, p->p_comm, 1472 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1473 1474 if (p->p_wmesg) 1475 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1476 ki->p_wchan = PTRTOINT64(p->p_wchan); 1477 1478 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1479 1480 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1481 ki->p_vm_rssize = 0; 1482 ki->p_vm_tsize = 0; 1483 ki->p_vm_dsize = 0; 1484 ki->p_vm_ssize = 0; 1485 } else { 1486 struct vmspace *vm = p->p_vmspace; 1487 1488 ki->p_vm_rssize = vm_resident_count(vm); 1489 ki->p_vm_tsize = vm->vm_tsize; 1490 ki->p_vm_dsize = vm->vm_dsize; 1491 ki->p_vm_ssize = vm->vm_ssize; 1492 } 1493 1494 if (p->p_session->s_ttyvp) 1495 ki->p_eflag |= EPROC_CTTY; 1496 if (SESS_LEADER(p)) 1497 ki->p_eflag |= EPROC_SLEADER; 1498 1499 /* XXX Is this double check necessary? */ 1500 if (P_ZOMBIE(p) || p->p_addr == NULL) { 1501 ki->p_uvalid = 0; 1502 } else { 1503 ki->p_uvalid = 1; 1504 1505 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1506 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1507 1508 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1509 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1510 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1511 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1512 1513 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1514 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1515 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1516 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1517 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1518 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1519 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1520 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1521 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1522 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1523 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1524 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1525 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1526 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1527 1528 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1529 p->p_stats->p_cru.ru_stime.tv_sec; 1530 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1531 p->p_stats->p_cru.ru_stime.tv_usec; 1532 } 1533 } 1534 1535 int 1536 sysctl_procargs(name, namelen, where, sizep, up) 1537 int *name; 1538 u_int namelen; 1539 void *where; 1540 size_t *sizep; 1541 struct proc *up; 1542 { 1543 struct ps_strings pss; 1544 struct proc *p; 1545 size_t len, upper_bound, xlen; 1546 struct uio auio; 1547 struct iovec aiov; 1548 vaddr_t argv; 1549 pid_t pid; 1550 int nargv, type, error, i; 1551 char *arg; 1552 char *tmp; 1553 1554 if (namelen != 2) 1555 return (EINVAL); 1556 pid = name[0]; 1557 type = name[1]; 1558 1559 switch (type) { 1560 case KERN_PROC_ARGV: 1561 case KERN_PROC_NARGV: 1562 case KERN_PROC_ENV: 1563 case KERN_PROC_NENV: 1564 /* ok */ 1565 break; 1566 default: 1567 return (EINVAL); 1568 } 1569 1570 /* check pid */ 1571 if ((p = pfind(pid)) == NULL) 1572 return (EINVAL); 1573 1574 /* only root or same user change look at the environment */ 1575 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1576 if (up->p_ucred->cr_uid != 0) { 1577 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1578 up->p_cred->p_ruid != p->p_cred->p_svuid) 1579 return (EPERM); 1580 } 1581 } 1582 1583 if (sizep != NULL && where == NULL) { 1584 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1585 *sizep = sizeof (int); 1586 else 1587 *sizep = ARG_MAX; /* XXX XXX XXX */ 1588 return (0); 1589 } 1590 if (where == NULL || sizep == NULL) 1591 return (EINVAL); 1592 1593 /* 1594 * Zombies don't have a stack, so we can't read their psstrings. 1595 * System processes also don't have a user stack. 1596 */ 1597 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1598 return (EINVAL); 1599 1600 /* 1601 * Lock the process down in memory. 1602 */ 1603 /* XXXCDC: how should locking work here? */ 1604 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1605 return (EFAULT); 1606 PHOLD(p); 1607 p->p_vmspace->vm_refcnt++; /* XXX */ 1608 1609 /* 1610 * Allocate a temporary buffer to hold the arguments. 1611 */ 1612 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1613 1614 /* 1615 * Read in the ps_strings structure. 1616 */ 1617 aiov.iov_base = &pss; 1618 aiov.iov_len = sizeof(pss); 1619 auio.uio_iov = &aiov; 1620 auio.uio_iovcnt = 1; 1621 auio.uio_offset = (vaddr_t)p->p_psstr; 1622 auio.uio_resid = sizeof(pss); 1623 auio.uio_segflg = UIO_SYSSPACE; 1624 auio.uio_rw = UIO_READ; 1625 auio.uio_procp = NULL; 1626 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1627 if (error) 1628 goto done; 1629 1630 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1631 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1632 else 1633 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1634 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1635 error = copyout(&nargv, where, sizeof(nargv)); 1636 *sizep = sizeof(nargv); 1637 goto done; 1638 } 1639 /* 1640 * Now read the address of the argument vector. 1641 */ 1642 switch (type) { 1643 case KERN_PROC_ARGV: 1644 /* XXX compat32 stuff here */ 1645 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1646 break; 1647 case KERN_PROC_ENV: 1648 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1649 break; 1650 default: 1651 return (EINVAL); 1652 } 1653 auio.uio_offset = (off_t)(long)tmp; 1654 aiov.iov_base = &argv; 1655 aiov.iov_len = sizeof(argv); 1656 auio.uio_iov = &aiov; 1657 auio.uio_iovcnt = 1; 1658 auio.uio_resid = sizeof(argv); 1659 auio.uio_segflg = UIO_SYSSPACE; 1660 auio.uio_rw = UIO_READ; 1661 auio.uio_procp = NULL; 1662 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1663 if (error) 1664 goto done; 1665 1666 /* 1667 * Now copy in the actual argument vector, one page at a time, 1668 * since we don't know how long the vector is (though, we do 1669 * know how many NUL-terminated strings are in the vector). 1670 */ 1671 len = 0; 1672 upper_bound = *sizep; 1673 for (; nargv != 0 && len < upper_bound; len += xlen) { 1674 aiov.iov_base = arg; 1675 aiov.iov_len = PAGE_SIZE; 1676 auio.uio_iov = &aiov; 1677 auio.uio_iovcnt = 1; 1678 auio.uio_offset = argv + len; 1679 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1680 auio.uio_resid = xlen; 1681 auio.uio_segflg = UIO_SYSSPACE; 1682 auio.uio_rw = UIO_READ; 1683 auio.uio_procp = NULL; 1684 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1685 if (error) 1686 goto done; 1687 1688 for (i = 0; i < xlen && nargv != 0; i++) { 1689 if (arg[i] == '\0') 1690 nargv--; /* one full string */ 1691 } 1692 1693 /* make sure we don't copyout past the end of the user's buffer */ 1694 if (len + i > upper_bound) 1695 i = upper_bound - len; 1696 1697 error = copyout(arg, (char *)where + len, i); 1698 if (error) 1699 break; 1700 1701 if (nargv == 0) { 1702 len += i; 1703 break; 1704 } 1705 } 1706 *sizep = len; 1707 1708 done: 1709 PRELE(p); 1710 uvmspace_free(p->p_vmspace); 1711 1712 free(arg, M_TEMP); 1713 return (error); 1714 } 1715
Indexes created Thu Sep 25 06:09:39 GMT 2025