kern_sysctl.c revision 1.69
1 /* $NetBSD: kern_sysctl.c,v 1.69 2000/06/02 15:53:05 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 return (sysctl_rdstruct(oldp, oldlenp, newp, cp_time, 462 sizeof(cp_time))); 463 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 464 case KERN_SYSVIPC_INFO: 465 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 466 #endif 467 default: 468 return (EOPNOTSUPP); 469 } 470 /* NOTREACHED */ 471 } 472 473 /* 474 * hardware related system variables. 475 */ 476 int 477 hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 478 int *name; 479 u_int namelen; 480 void *oldp; 481 size_t *oldlenp; 482 void *newp; 483 size_t newlen; 484 struct proc *p; 485 { 486 487 /* all sysctl names at this level are terminal */ 488 if (namelen != 1) 489 return (ENOTDIR); /* overloaded */ 490 491 switch (name[0]) { 492 case HW_MACHINE: 493 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 494 case HW_MACHINE_ARCH: 495 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 496 case HW_MODEL: 497 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 498 case HW_NCPU: 499 return (sysctl_rdint(oldp, oldlenp, newp, 1)); /* XXX */ 500 case HW_BYTEORDER: 501 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 502 case HW_PHYSMEM: 503 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 504 case HW_USERMEM: 505 return (sysctl_rdint(oldp, oldlenp, newp, 506 ctob(physmem - uvmexp.wired))); 507 case HW_PAGESIZE: 508 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 509 case HW_ALIGNBYTES: 510 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 511 default: 512 return (EOPNOTSUPP); 513 } 514 /* NOTREACHED */ 515 } 516 517 #ifdef DEBUG 518 /* 519 * Debugging related system variables. 520 */ 521 struct ctldebug debug0, debug1, debug2, debug3, debug4; 522 struct ctldebug debug5, debug6, debug7, debug8, debug9; 523 struct ctldebug debug10, debug11, debug12, debug13, debug14; 524 struct ctldebug debug15, debug16, debug17, debug18, debug19; 525 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 526 &debug0, &debug1, &debug2, &debug3, &debug4, 527 &debug5, &debug6, &debug7, &debug8, &debug9, 528 &debug10, &debug11, &debug12, &debug13, &debug14, 529 &debug15, &debug16, &debug17, &debug18, &debug19, 530 }; 531 int 532 debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 533 int *name; 534 u_int namelen; 535 void *oldp; 536 size_t *oldlenp; 537 void *newp; 538 size_t newlen; 539 struct proc *p; 540 { 541 struct ctldebug *cdp; 542 543 /* all sysctl names at this level are name and field */ 544 if (namelen != 2) 545 return (ENOTDIR); /* overloaded */ 546 cdp = debugvars[name[0]]; 547 if (name[0] >= CTL_DEBUG_MAXID || cdp->debugname == 0) 548 return (EOPNOTSUPP); 549 switch (name[1]) { 550 case CTL_DEBUG_NAME: 551 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 552 case CTL_DEBUG_VALUE: 553 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 554 default: 555 return (EOPNOTSUPP); 556 } 557 /* NOTREACHED */ 558 } 559 #endif /* DEBUG */ 560 561 int 562 proc_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 563 int *name; 564 u_int namelen; 565 void *oldp; 566 size_t *oldlenp; 567 void *newp; 568 size_t newlen; 569 struct proc *p; 570 { 571 struct proc *ptmp = NULL; 572 const struct proclist_desc *pd; 573 int error = 0; 574 struct rlimit alim; 575 struct plimit *newplim; 576 char *tmps = NULL; 577 int i, curlen, len; 578 579 if (namelen < 2) 580 return EINVAL; 581 582 if (name[0] == PROC_CURPROC) { 583 ptmp = p; 584 } else { 585 proclist_lock_read(); 586 for (pd = proclists; pd->pd_list != NULL; pd++) { 587 for (ptmp = LIST_FIRST(pd->pd_list); ptmp != NULL; 588 ptmp = LIST_NEXT(ptmp, p_list)) { 589 /* Skip embryonic processes. */ 590 if (ptmp->p_stat == SIDL) 591 continue; 592 if (ptmp->p_pid == (pid_t)name[0]) 593 break; 594 } 595 if (ptmp != NULL) 596 break; 597 } 598 proclist_unlock_read(); 599 if (ptmp == NULL) 600 return(ESRCH); 601 if (p->p_ucred->cr_uid != 0) { 602 if(p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 603 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 604 return EPERM; 605 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 606 return EPERM; /* sgid proc */ 607 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 608 if (p->p_ucred->cr_groups[i] == 609 ptmp->p_cred->p_rgid) 610 break; 611 } 612 if (i == p->p_ucred->cr_ngroups) 613 return EPERM; 614 } 615 } 616 if (name[1] == PROC_PID_CORENAME) { 617 if (namelen != 2) 618 return EINVAL; 619 /* 620 * Can't use sysctl_string() here because we may malloc a new 621 * area during the process, so we have to do it by hand. 622 */ 623 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 624 if (oldlenp && *oldlenp < curlen) { 625 if (!oldp) 626 *oldlenp = curlen; 627 return (ENOMEM); 628 } 629 if (newp) { 630 if (securelevel > 2) 631 return EPERM; 632 if (newlen > MAXPATHLEN) 633 return ENAMETOOLONG; 634 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 635 if (tmps == NULL) 636 return ENOMEM; 637 error = copyin(newp, tmps, newlen + 1); 638 tmps[newlen] = '\0'; 639 if (error) 640 goto cleanup; 641 /* Enforce to be either 'core' for end with '.core' */ 642 if (newlen < 4) { /* c.o.r.e */ 643 error = EINVAL; 644 goto cleanup; 645 } 646 len = newlen - 4; 647 if (len > 0) { 648 if (tmps[len - 1] != '.' && 649 tmps[len - 1] != '/') { 650 error = EINVAL; 651 goto cleanup; 652 } 653 } 654 if (strcmp(&tmps[len], "core") != 0) { 655 error = EINVAL; 656 goto cleanup; 657 } 658 } 659 if (oldp && oldlenp) { 660 *oldlenp = curlen; 661 error = copyout(ptmp->p_limit->pl_corename, oldp, 662 curlen); 663 } 664 if (newp && error == 0) { 665 /* if the 2 strings are identical, don't limcopy() */ 666 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 667 error = 0; 668 goto cleanup; 669 } 670 if (ptmp->p_limit->p_refcnt > 1 && 671 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 672 newplim = limcopy(ptmp->p_limit); 673 limfree(ptmp->p_limit); 674 ptmp->p_limit = newplim; 675 } else if (ptmp->p_limit->pl_corename != defcorename) { 676 free(ptmp->p_limit->pl_corename, M_TEMP); 677 } 678 ptmp->p_limit->pl_corename = tmps; 679 return (0); 680 } 681 cleanup: 682 if (tmps) 683 free(tmps, M_TEMP); 684 return (error); 685 } 686 if (name[1] == PROC_PID_LIMIT) { 687 if (namelen != 4 || name[2] >= PROC_PID_LIMIT_MAXID) 688 return EINVAL; 689 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 690 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 691 error = sysctl_quad(oldp, oldlenp, newp, newlen, 692 &alim.rlim_max); 693 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 694 error = sysctl_quad(oldp, oldlenp, newp, newlen, 695 &alim.rlim_cur); 696 else 697 error = EINVAL; 698 699 if (error) 700 return error; 701 702 if (newp) 703 error = dosetrlimit(ptmp, p->p_cred, 704 name[2] - 1, &alim); 705 return error; 706 } 707 return (EINVAL); 708 } 709 710 /* 711 * Convenience macros. 712 */ 713 714 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 715 if (oldlenp) { \ 716 if (!oldp) \ 717 *oldlenp = len; \ 718 else { \ 719 if (*oldlenp < len) \ 720 return(ENOMEM); \ 721 *oldlenp = len; \ 722 error = copyout((caddr_t)valp, oldp, len); \ 723 } \ 724 } 725 726 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 727 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 728 729 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 730 if (newp && newlen != len) \ 731 return (EINVAL); 732 733 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 734 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 735 736 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 737 if (error == 0 && newp) \ 738 error = copyin(newp, valp, len); 739 740 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 741 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 742 743 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 744 if (oldlenp) { \ 745 len = strlen(str) + 1; \ 746 if (!oldp) \ 747 *oldlenp = len; \ 748 else { \ 749 if (*oldlenp < len) { \ 750 err2 = ENOMEM; \ 751 len = *oldlenp; \ 752 } else \ 753 *oldlenp = len; \ 754 error = copyout(str, oldp, len);\ 755 if (error == 0) \ 756 error = err2; \ 757 } \ 758 } 759 760 /* 761 * Validate parameters and get old / set new parameters 762 * for an integer-valued sysctl function. 763 */ 764 int 765 sysctl_int(oldp, oldlenp, newp, newlen, valp) 766 void *oldp; 767 size_t *oldlenp; 768 void *newp; 769 size_t newlen; 770 int *valp; 771 { 772 int error = 0; 773 774 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 775 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 776 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 777 778 return (error); 779 } 780 781 782 /* 783 * As above, but read-only. 784 */ 785 int 786 sysctl_rdint(oldp, oldlenp, newp, val) 787 void *oldp; 788 size_t *oldlenp; 789 void *newp; 790 int val; 791 { 792 int error = 0; 793 794 if (newp) 795 return (EPERM); 796 797 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 798 799 return (error); 800 } 801 802 /* 803 * Validate parameters and get old / set new parameters 804 * for an quad-valued sysctl function. 805 */ 806 int 807 sysctl_quad(oldp, oldlenp, newp, newlen, valp) 808 void *oldp; 809 size_t *oldlenp; 810 void *newp; 811 size_t newlen; 812 quad_t *valp; 813 { 814 int error = 0; 815 816 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 817 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 818 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 819 820 return (error); 821 } 822 823 /* 824 * As above, but read-only. 825 */ 826 int 827 sysctl_rdquad(oldp, oldlenp, newp, val) 828 void *oldp; 829 size_t *oldlenp; 830 void *newp; 831 quad_t val; 832 { 833 int error = 0; 834 835 if (newp) 836 return (EPERM); 837 838 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 839 840 return (error); 841 } 842 843 /* 844 * Validate parameters and get old / set new parameters 845 * for a string-valued sysctl function. 846 */ 847 int 848 sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 849 void *oldp; 850 size_t *oldlenp; 851 void *newp; 852 size_t newlen; 853 char *str; 854 int maxlen; 855 { 856 int len, error = 0, err2 = 0; 857 858 if (newp && newlen >= maxlen) 859 return (EINVAL); 860 861 SYSCTL_STRING_CORE(oldp, oldlenp, str); 862 863 if (error == 0 && newp) { 864 error = copyin(newp, str, newlen); 865 str[newlen] = 0; 866 } 867 return (error); 868 } 869 870 /* 871 * As above, but read-only. 872 */ 873 int 874 sysctl_rdstring(oldp, oldlenp, newp, str) 875 void *oldp; 876 size_t *oldlenp; 877 void *newp; 878 char *str; 879 { 880 int len, error = 0, err2 = 0; 881 882 if (newp) 883 return (EPERM); 884 885 SYSCTL_STRING_CORE(oldp, oldlenp, str); 886 887 return (error); 888 } 889 890 /* 891 * Validate parameters and get old / set new parameters 892 * for a structure oriented sysctl function. 893 */ 894 int 895 sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 896 void *oldp; 897 size_t *oldlenp; 898 void *newp; 899 size_t newlen; 900 void *sp; 901 int len; 902 { 903 int error = 0; 904 905 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 906 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 907 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 908 909 return (error); 910 } 911 912 /* 913 * Validate parameters and get old parameters 914 * for a structure oriented sysctl function. 915 */ 916 int 917 sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 918 void *oldp; 919 size_t *oldlenp; 920 void *newp, *sp; 921 int len; 922 { 923 int error = 0; 924 925 if (newp) 926 return (EPERM); 927 928 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 929 930 return (error); 931 } 932 933 /* 934 * Get file structures. 935 */ 936 static int 937 sysctl_file(vwhere, sizep) 938 void *vwhere; 939 size_t *sizep; 940 { 941 int buflen, error; 942 struct file *fp; 943 char *start, *where; 944 945 start = where = vwhere; 946 buflen = *sizep; 947 if (where == NULL) { 948 /* 949 * overestimate by 10 files 950 */ 951 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 952 return (0); 953 } 954 955 /* 956 * first copyout filehead 957 */ 958 if (buflen < sizeof(filehead)) { 959 *sizep = 0; 960 return (0); 961 } 962 error = copyout((caddr_t)&filehead, where, sizeof(filehead)); 963 if (error) 964 return (error); 965 buflen -= sizeof(filehead); 966 where += sizeof(filehead); 967 968 /* 969 * followed by an array of file structures 970 */ 971 for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) { 972 if (buflen < sizeof(struct file)) { 973 *sizep = where - start; 974 return (ENOMEM); 975 } 976 error = copyout((caddr_t)fp, where, sizeof(struct file)); 977 if (error) 978 return (error); 979 buflen -= sizeof(struct file); 980 where += sizeof(struct file); 981 } 982 *sizep = where - start; 983 return (0); 984 } 985 986 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 987 #define FILL_PERM(src, dst) do { \ 988 (dst)._key = (src)._key; \ 989 (dst).uid = (src).uid; \ 990 (dst).gid = (src).gid; \ 991 (dst).cuid = (src).cuid; \ 992 (dst).cgid = (src).cgid; \ 993 (dst).mode = (src).mode; \ 994 (dst)._seq = (src)._seq; \ 995 } while (0); 996 #define FILL_MSG(src, dst) do { \ 997 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 998 (dst).msg_qnum = (src).msg_qnum; \ 999 (dst).msg_qbytes = (src).msg_qbytes; \ 1000 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1001 (dst).msg_lspid = (src).msg_lspid; \ 1002 (dst).msg_lrpid = (src).msg_lrpid; \ 1003 (dst).msg_stime = (src).msg_stime; \ 1004 (dst).msg_rtime = (src).msg_rtime; \ 1005 (dst).msg_ctime = (src).msg_ctime; \ 1006 } while (0) 1007 #define FILL_SEM(src, dst) do { \ 1008 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1009 (dst).sem_nsems = (src).sem_nsems; \ 1010 (dst).sem_otime = (src).sem_otime; \ 1011 (dst).sem_ctime = (src).sem_ctime; \ 1012 } while (0) 1013 #define FILL_SHM(src, dst) do { \ 1014 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1015 (dst).shm_segsz = (src).shm_segsz; \ 1016 (dst).shm_lpid = (src).shm_lpid; \ 1017 (dst).shm_cpid = (src).shm_cpid; \ 1018 (dst).shm_atime = (src).shm_atime; \ 1019 (dst).shm_dtime = (src).shm_dtime; \ 1020 (dst).shm_ctime = (src).shm_ctime; \ 1021 (dst).shm_nattch = (src).shm_nattch; \ 1022 } while (0) 1023 1024 static int 1025 sysctl_sysvipc(name, namelen, where, sizep) 1026 int *name; 1027 u_int namelen; 1028 void *where; 1029 size_t *sizep; 1030 { 1031 struct msg_sysctl_info *msgsi; 1032 struct sem_sysctl_info *semsi; 1033 struct shm_sysctl_info *shmsi; 1034 size_t infosize, dssize, tsize, buflen; 1035 void *buf = NULL, *buf2; 1036 char *start; 1037 int32_t nds; 1038 int i, error, ret; 1039 1040 if (namelen != 1) 1041 return (EINVAL); 1042 1043 start = where; 1044 buflen = *sizep; 1045 1046 switch (*name) { 1047 case KERN_SYSVIPC_MSG_INFO: 1048 #ifdef SYSVMSG 1049 infosize = sizeof(msgsi->msginfo); 1050 nds = msginfo.msgmni; 1051 dssize = sizeof(msgsi->msgids[0]); 1052 break; 1053 #else 1054 return (EINVAL); 1055 #endif 1056 case KERN_SYSVIPC_SEM_INFO: 1057 #ifdef SYSVSEM 1058 infosize = sizeof(semsi->seminfo); 1059 nds = seminfo.semmni; 1060 dssize = sizeof(semsi->semids[0]); 1061 break; 1062 #else 1063 return (EINVAL); 1064 #endif 1065 case KERN_SYSVIPC_SHM_INFO: 1066 #ifdef SYSVSHM 1067 infosize = sizeof(shmsi->shminfo); 1068 nds = shminfo.shmmni; 1069 dssize = sizeof(shmsi->shmids[0]); 1070 break; 1071 #else 1072 return (EINVAL); 1073 #endif 1074 default: 1075 return (EINVAL); 1076 } 1077 /* 1078 * Round infosize to 64 bit boundary if requesting more than just 1079 * the info structure or getting the total data size. 1080 */ 1081 if (where == NULL || *sizep > infosize) 1082 infosize = ((infosize + 7) / 8) * 8; 1083 tsize = infosize + nds * dssize; 1084 1085 /* Return just the total size required. */ 1086 if (where == NULL) { 1087 *sizep = tsize; 1088 return (0); 1089 } 1090 1091 /* Not enough room for even the info struct. */ 1092 if (buflen < infosize) { 1093 *sizep = 0; 1094 return (ENOMEM); 1095 } 1096 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1097 memset(buf, 0, min(tsize, buflen)); 1098 1099 switch (*name) { 1100 case KERN_SYSVIPC_MSG_INFO: 1101 msgsi = (struct msg_sysctl_info *)buf; 1102 buf2 = &msgsi->msgids[0]; 1103 msgsi->msginfo = msginfo; 1104 break; 1105 case KERN_SYSVIPC_SEM_INFO: 1106 semsi = (struct sem_sysctl_info *)buf; 1107 buf2 = &semsi->semids[0]; 1108 semsi->seminfo = seminfo; 1109 break; 1110 case KERN_SYSVIPC_SHM_INFO: 1111 shmsi = (struct shm_sysctl_info *)buf; 1112 buf2 = &shmsi->shmids[0]; 1113 shmsi->shminfo = shminfo; 1114 break; 1115 } 1116 buflen -= infosize; 1117 1118 ret = 0; 1119 if (buflen > 0) { 1120 /* Fill in the IPC data structures. */ 1121 for (i = 0; i < nds; i++) { 1122 if (buflen < dssize) { 1123 ret = ENOMEM; 1124 break; 1125 } 1126 switch (*name) { 1127 case KERN_SYSVIPC_MSG_INFO: 1128 FILL_MSG(msqids[i], msgsi->msgids[i]); 1129 break; 1130 case KERN_SYSVIPC_SEM_INFO: 1131 FILL_SEM(sema[i], semsi->semids[i]); 1132 break; 1133 case KERN_SYSVIPC_SHM_INFO: 1134 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1135 break; 1136 } 1137 buflen -= dssize; 1138 } 1139 } 1140 *sizep -= buflen; 1141 error = copyout(buf, start, *sizep); 1142 /* If copyout succeeded, use return code set earlier. */ 1143 if (error == 0) 1144 error = ret; 1145 if (buf) 1146 free(buf, M_TEMP); 1147 return (error); 1148 } 1149 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1150 1151 /* 1152 * try over estimating by 5 procs 1153 */ 1154 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1155 1156 static int 1157 sysctl_doeproc(name, namelen, vwhere, sizep) 1158 int *name; 1159 u_int namelen; 1160 void *vwhere; 1161 size_t *sizep; 1162 { 1163 struct eproc eproc; 1164 struct kinfo_proc2 kproc2; 1165 struct kinfo_proc *dp; 1166 struct proc *p; 1167 const struct proclist_desc *pd; 1168 char *where, *dp2; 1169 int type, op, arg, elem_size, elem_count; 1170 int buflen, needed, error; 1171 1172 dp = vwhere; 1173 dp2 = where = vwhere; 1174 buflen = where != NULL ? *sizep : 0; 1175 error = needed = 0; 1176 type = name[0]; 1177 1178 if (type == KERN_PROC) { 1179 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1180 return (EINVAL); 1181 op = name[1]; 1182 if (op != KERN_PROC_ALL) 1183 arg = name[2]; 1184 } else { 1185 if (namelen != 5) 1186 return (EINVAL); 1187 op = name[1]; 1188 arg = name[2]; 1189 elem_size = name[3]; 1190 elem_count = name[4]; 1191 } 1192 1193 proclist_lock_read(); 1194 1195 pd = proclists; 1196 again: 1197 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1198 /* 1199 * Skip embryonic processes. 1200 */ 1201 if (p->p_stat == SIDL) 1202 continue; 1203 /* 1204 * TODO - make more efficient (see notes below). 1205 * do by session. 1206 */ 1207 switch (op) { 1208 1209 case KERN_PROC_PID: 1210 /* could do this with just a lookup */ 1211 if (p->p_pid != (pid_t)arg) 1212 continue; 1213 break; 1214 1215 case KERN_PROC_PGRP: 1216 /* could do this by traversing pgrp */ 1217 if (p->p_pgrp->pg_id != (pid_t)arg) 1218 continue; 1219 break; 1220 1221 case KERN_PROC_TTY: 1222 if (arg == KERN_PROC_TTY_REVOKE) { 1223 if ((p->p_flag & P_CONTROLT) == 0 || 1224 p->p_session->s_ttyp == NULL || 1225 p->p_session->s_ttyvp != NULL) 1226 continue; 1227 } else if ((p->p_flag & P_CONTROLT) == 0 || 1228 p->p_session->s_ttyp == NULL) { 1229 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1230 continue; 1231 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1232 continue; 1233 break; 1234 1235 case KERN_PROC_UID: 1236 if (p->p_ucred->cr_uid != (uid_t)arg) 1237 continue; 1238 break; 1239 1240 case KERN_PROC_RUID: 1241 if (p->p_cred->p_ruid != (uid_t)arg) 1242 continue; 1243 break; 1244 } 1245 if (type == KERN_PROC) { 1246 if (buflen >= sizeof(struct kinfo_proc)) { 1247 fill_eproc(p, &eproc); 1248 error = copyout((caddr_t)p, &dp->kp_proc, 1249 sizeof(struct proc)); 1250 if (error) 1251 goto cleanup; 1252 error = copyout((caddr_t)&eproc, &dp->kp_eproc, 1253 sizeof(eproc)); 1254 if (error) 1255 goto cleanup; 1256 dp++; 1257 buflen -= sizeof(struct kinfo_proc); 1258 } 1259 needed += sizeof(struct kinfo_proc); 1260 } else { /* KERN_PROC2 */ 1261 if (buflen >= elem_size && elem_count > 0) { 1262 fill_kproc2(p, &kproc2); 1263 /* 1264 * Copy out elem_size, but not larger than 1265 * the size of a struct kinfo_proc2. 1266 */ 1267 error = copyout(&kproc2, dp2, 1268 min(sizeof(kproc2), elem_size)); 1269 if (error) 1270 goto cleanup; 1271 dp2 += elem_size; 1272 buflen -= elem_size; 1273 elem_count--; 1274 } 1275 needed += elem_size; 1276 } 1277 } 1278 pd++; 1279 if (pd->pd_list != NULL) 1280 goto again; 1281 proclist_unlock_read(); 1282 1283 if (where != NULL) { 1284 if (type == KERN_PROC) 1285 *sizep = (caddr_t)dp - where; 1286 else 1287 *sizep = dp2 - where; 1288 if (needed > *sizep) 1289 return (ENOMEM); 1290 } else { 1291 needed += KERN_PROCSLOP; 1292 *sizep = needed; 1293 } 1294 return (0); 1295 cleanup: 1296 proclist_unlock_read(); 1297 return (error); 1298 } 1299 1300 /* 1301 * Fill in an eproc structure for the specified process. 1302 */ 1303 void 1304 fill_eproc(p, ep) 1305 struct proc *p; 1306 struct eproc *ep; 1307 { 1308 struct tty *tp; 1309 1310 ep->e_paddr = p; 1311 ep->e_sess = p->p_session; 1312 ep->e_pcred = *p->p_cred; 1313 ep->e_ucred = *p->p_ucred; 1314 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1315 ep->e_vm.vm_rssize = 0; 1316 ep->e_vm.vm_tsize = 0; 1317 ep->e_vm.vm_dsize = 0; 1318 ep->e_vm.vm_ssize = 0; 1319 /* ep->e_vm.vm_pmap = XXX; */ 1320 } else { 1321 struct vmspace *vm = p->p_vmspace; 1322 1323 ep->e_vm.vm_rssize = vm_resident_count(vm); 1324 ep->e_vm.vm_tsize = vm->vm_tsize; 1325 ep->e_vm.vm_dsize = vm->vm_dsize; 1326 ep->e_vm.vm_ssize = vm->vm_ssize; 1327 } 1328 if (p->p_pptr) 1329 ep->e_ppid = p->p_pptr->p_pid; 1330 else 1331 ep->e_ppid = 0; 1332 ep->e_pgid = p->p_pgrp->pg_id; 1333 ep->e_sid = ep->e_sess->s_sid; 1334 ep->e_jobc = p->p_pgrp->pg_jobc; 1335 if ((p->p_flag & P_CONTROLT) && 1336 (tp = ep->e_sess->s_ttyp)) { 1337 ep->e_tdev = tp->t_dev; 1338 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1339 ep->e_tsess = tp->t_session; 1340 } else 1341 ep->e_tdev = NODEV; 1342 if (p->p_wmesg) 1343 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 1344 ep->e_xsize = ep->e_xrssize = 0; 1345 ep->e_xccount = ep->e_xswrss = 0; 1346 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1347 if (SESS_LEADER(p)) 1348 ep->e_flag |= EPROC_SLEADER; 1349 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1350 } 1351 1352 /* 1353 * Fill in an eproc structure for the specified process. 1354 */ 1355 static void 1356 fill_kproc2(p, ki) 1357 struct proc *p; 1358 struct kinfo_proc2 *ki; 1359 { 1360 struct tty *tp; 1361 1362 memset(ki, 0, sizeof(*ki)); 1363 1364 ki->p_forw = PTRTOINT64(p->p_forw); 1365 ki->p_back = PTRTOINT64(p->p_back); 1366 ki->p_paddr = PTRTOINT64(p); 1367 1368 ki->p_addr = PTRTOINT64(p->p_addr); 1369 ki->p_fd = PTRTOINT64(p->p_fd); 1370 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1371 ki->p_stats = PTRTOINT64(p->p_stats); 1372 ki->p_limit = PTRTOINT64(p->p_limit); 1373 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1374 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1375 ki->p_sess = PTRTOINT64(p->p_session); 1376 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1377 ki->p_ru = PTRTOINT64(p->p_ru); 1378 1379 ki->p_eflag = 0; 1380 ki->p_exitsig = p->p_exitsig; 1381 ki->p_flag = p->p_flag; 1382 1383 ki->p_pid = p->p_pid; 1384 if (p->p_pptr) 1385 ki->p_ppid = p->p_pptr->p_pid; 1386 else 1387 ki->p_ppid = 0; 1388 ki->p_sid = p->p_session->s_sid; 1389 ki->p__pgid = p->p_pgrp->pg_id; 1390 1391 ki->p_tpgid = NO_PID; /* may be changed if controlling tty below */ 1392 1393 ki->p_uid = p->p_ucred->cr_uid; 1394 ki->p_ruid = p->p_cred->p_ruid; 1395 ki->p_gid = p->p_ucred->cr_gid; 1396 ki->p_rgid = p->p_cred->p_rgid; 1397 1398 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1399 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1400 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1401 1402 ki->p_jobc = p->p_pgrp->pg_jobc; 1403 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1404 ki->p_tdev = tp->t_dev; 1405 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 1406 ki->p_tsess = PTRTOINT64(tp->t_session); 1407 } else { 1408 ki->p_tdev = NODEV; 1409 } 1410 1411 ki->p_estcpu = p->p_estcpu; 1412 ki->p_rtime_sec = p->p_rtime.tv_sec; 1413 ki->p_rtime_usec = p->p_rtime.tv_usec; 1414 ki->p_cpticks = p->p_cpticks; 1415 ki->p_pctcpu = p->p_pctcpu; 1416 ki->p_swtime = p->p_swtime; 1417 ki->p_slptime = p->p_slptime; 1418 if (p->p_stat == SONPROC) { 1419 KDASSERT(p->p_cpu != NULL); 1420 ki->p_schedflags = p->p_cpu->ci_schedstate.spc_flags; 1421 } else 1422 ki->p_schedflags = 0; 1423 1424 ki->p_uticks = p->p_uticks; 1425 ki->p_sticks = p->p_sticks; 1426 ki->p_iticks = p->p_iticks; 1427 1428 ki->p_tracep = PTRTOINT64(p->p_tracep); 1429 ki->p_traceflag = p->p_traceflag; 1430 1431 ki->p_holdcnt = p->p_holdcnt; 1432 1433 memcpy(&ki->p_siglist, &p->p_siglist, sizeof(ki_sigset_t)); 1434 memcpy(&ki->p_sigmask, &p->p_sigmask, sizeof(ki_sigset_t)); 1435 memcpy(&ki->p_sigignore, &p->p_sigignore, sizeof(ki_sigset_t)); 1436 memcpy(&ki->p_sigcatch, &p->p_sigcatch, sizeof(ki_sigset_t)); 1437 1438 ki->p_stat = p->p_stat; 1439 ki->p_priority = p->p_priority; 1440 ki->p_usrpri = p->p_usrpri; 1441 ki->p_nice = p->p_nice; 1442 1443 ki->p_xstat = p->p_xstat; 1444 ki->p_acflag = p->p_acflag; 1445 1446 strncpy(ki->p_comm, p->p_comm, 1447 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1448 1449 if (p->p_wmesg) 1450 strncpy(ki->p_wmesg, p->p_wmesg, sizeof(ki->p_wmesg)); 1451 ki->p_wchan = PTRTOINT64(p->p_wchan); 1452 1453 strncpy(ki->p_login, p->p_session->s_login, sizeof(ki->p_login)); 1454 1455 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1456 ki->p_vm_rssize = 0; 1457 ki->p_vm_tsize = 0; 1458 ki->p_vm_dsize = 0; 1459 ki->p_vm_ssize = 0; 1460 } else { 1461 struct vmspace *vm = p->p_vmspace; 1462 1463 ki->p_vm_rssize = vm_resident_count(vm); 1464 ki->p_vm_tsize = vm->vm_tsize; 1465 ki->p_vm_dsize = vm->vm_dsize; 1466 ki->p_vm_ssize = vm->vm_ssize; 1467 } 1468 1469 if (p->p_session->s_ttyvp) 1470 ki->p_eflag |= EPROC_CTTY; 1471 if (SESS_LEADER(p)) 1472 ki->p_eflag |= EPROC_SLEADER; 1473 1474 /* XXX Is this double check necessary? */ 1475 if (P_ZOMBIE(p) || p->p_addr == NULL) { 1476 ki->p_uvalid = 0; 1477 } else { 1478 ki->p_uvalid = 1; 1479 1480 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 1481 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 1482 1483 ki->p_uutime_sec = p->p_stats->p_ru.ru_utime.tv_sec; 1484 ki->p_uutime_usec = p->p_stats->p_ru.ru_utime.tv_usec; 1485 ki->p_ustime_sec = p->p_stats->p_ru.ru_stime.tv_sec; 1486 ki->p_ustime_usec = p->p_stats->p_ru.ru_stime.tv_usec; 1487 1488 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 1489 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 1490 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 1491 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 1492 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 1493 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 1494 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 1495 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 1496 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 1497 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 1498 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 1499 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 1500 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 1501 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 1502 1503 ki->p_uctime_sec = p->p_stats->p_cru.ru_utime.tv_sec + 1504 p->p_stats->p_cru.ru_stime.tv_sec; 1505 ki->p_uctime_usec = p->p_stats->p_cru.ru_utime.tv_usec + 1506 p->p_stats->p_cru.ru_stime.tv_usec; 1507 } 1508 } 1509 1510 int 1511 sysctl_procargs(name, namelen, where, sizep, up) 1512 int *name; 1513 u_int namelen; 1514 void *where; 1515 size_t *sizep; 1516 struct proc *up; 1517 { 1518 struct ps_strings pss; 1519 struct proc *p; 1520 size_t len, upper_bound, xlen; 1521 struct uio auio; 1522 struct iovec aiov; 1523 vaddr_t argv; 1524 pid_t pid; 1525 int nargv, type, error, i; 1526 char *arg; 1527 char *tmp; 1528 1529 if (namelen != 2) 1530 return (EINVAL); 1531 pid = name[0]; 1532 type = name[1]; 1533 1534 switch (type) { 1535 case KERN_PROC_ARGV: 1536 case KERN_PROC_NARGV: 1537 case KERN_PROC_ENV: 1538 case KERN_PROC_NENV: 1539 /* ok */ 1540 break; 1541 default: 1542 return (EINVAL); 1543 } 1544 1545 /* check pid */ 1546 if ((p = pfind(pid)) == NULL) 1547 return (EINVAL); 1548 1549 /* only root or same user change look at the environment */ 1550 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 1551 if (up->p_ucred->cr_uid != 0) { 1552 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 1553 up->p_cred->p_ruid != p->p_cred->p_svuid) 1554 return (EPERM); 1555 } 1556 } 1557 1558 if (sizep != NULL && where == NULL) { 1559 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 1560 *sizep = sizeof (int); 1561 else 1562 *sizep = ARG_MAX; /* XXX XXX XXX */ 1563 return (0); 1564 } 1565 if (where == NULL || sizep == NULL) 1566 return (EINVAL); 1567 1568 /* 1569 * Zombies don't have a stack, so we can't read their psstrings. 1570 * System processes also don't have a user stack. 1571 */ 1572 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 1573 return (EINVAL); 1574 1575 /* 1576 * Lock the process down in memory. 1577 */ 1578 /* XXXCDC: how should locking work here? */ 1579 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 1580 return (EFAULT); 1581 PHOLD(p); 1582 p->p_vmspace->vm_refcnt++; /* XXX */ 1583 1584 /* 1585 * Allocate a temporary buffer to hold the arguments. 1586 */ 1587 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 1588 1589 /* 1590 * Read in the ps_strings structure. 1591 */ 1592 aiov.iov_base = &pss; 1593 aiov.iov_len = sizeof(pss); 1594 auio.uio_iov = &aiov; 1595 auio.uio_iovcnt = 1; 1596 auio.uio_offset = (vaddr_t)p->p_psstr; 1597 auio.uio_resid = sizeof(pss); 1598 auio.uio_segflg = UIO_SYSSPACE; 1599 auio.uio_rw = UIO_READ; 1600 auio.uio_procp = NULL; 1601 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1602 if (error) 1603 goto done; 1604 1605 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 1606 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 1607 else 1608 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 1609 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 1610 error = copyout(&nargv, where, sizeof(nargv)); 1611 *sizep = sizeof(nargv); 1612 goto done; 1613 } 1614 /* 1615 * Now read the address of the argument vector. 1616 */ 1617 switch (type) { 1618 case KERN_PROC_ARGV: 1619 /* XXX compat32 stuff here */ 1620 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 1621 break; 1622 case KERN_PROC_ENV: 1623 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 1624 break; 1625 default: 1626 return (EINVAL); 1627 } 1628 auio.uio_offset = (off_t)(long)tmp; 1629 aiov.iov_base = &argv; 1630 aiov.iov_len = sizeof(argv); 1631 auio.uio_iov = &aiov; 1632 auio.uio_iovcnt = 1; 1633 auio.uio_resid = sizeof(argv); 1634 auio.uio_segflg = UIO_SYSSPACE; 1635 auio.uio_rw = UIO_READ; 1636 auio.uio_procp = NULL; 1637 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1638 if (error) 1639 goto done; 1640 1641 /* 1642 * Now copy in the actual argument vector, one page at a time, 1643 * since we don't know how long the vector is (though, we do 1644 * know how many NUL-terminated strings are in the vector). 1645 */ 1646 len = 0; 1647 upper_bound = *sizep; 1648 for (; nargv != 0 && len < upper_bound; len += xlen) { 1649 aiov.iov_base = arg; 1650 aiov.iov_len = PAGE_SIZE; 1651 auio.uio_iov = &aiov; 1652 auio.uio_iovcnt = 1; 1653 auio.uio_offset = argv + len; 1654 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 1655 auio.uio_resid = xlen; 1656 auio.uio_segflg = UIO_SYSSPACE; 1657 auio.uio_rw = UIO_READ; 1658 auio.uio_procp = NULL; 1659 error = uvm_io(&p->p_vmspace->vm_map, &auio); 1660 if (error) 1661 goto done; 1662 1663 for (i = 0; i < xlen && nargv != 0; i++) { 1664 if (arg[i] == '\0') 1665 nargv--; /* one full string */ 1666 } 1667 1668 /* make sure we don't copyout past the end of the user's buffer */ 1669 if (len + i > upper_bound) 1670 i = upper_bound - len; 1671 1672 error = copyout(arg, (char *)where + len, i); 1673 if (error) 1674 break; 1675 1676 if (nargv == 0) { 1677 len += i; 1678 break; 1679 } 1680 } 1681 *sizep = len; 1682 1683 done: 1684 PRELE(p); 1685 uvmspace_free(p->p_vmspace); 1686 1687 free(arg, M_TEMP); 1688 return (error); 1689 } 1690
Indexes created Sat Sep 20 22:09:52 GMT 2025