1 /*- 2 * Copyright (c) 2009 Stanislav Sedov <stas@FreeBSD.org> 3 * Copyright (c) 1988, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/param.h> 39 #include <sys/time.h> 40 #include <sys/proc.h> 41 #include <sys/user.h> 42 #include <sys/stat.h> 43 #include <sys/vnode.h> 44 #include <sys/socket.h> 45 #include <sys/socketvar.h> 46 #include <sys/domain.h> 47 #include <sys/protosw.h> 48 #include <sys/un.h> 49 #include <sys/unpcb.h> 50 #include <sys/sysctl.h> 51 #include <sys/tty.h> 52 #include <sys/filedesc.h> 53 #include <sys/queue.h> 54 #define _WANT_FILE 55 #include <sys/file.h> 56 #include <sys/conf.h> 57 #define _KERNEL 58 #include <sys/mount.h> 59 #include <sys/pipe.h> 60 #include <ufs/ufs/quota.h> 61 #include <ufs/ufs/inode.h> 62 #include <fs/devfs/devfs.h> 63 #include <fs/devfs/devfs_int.h> 64 #undef _KERNEL 65 #include <nfs/nfsproto.h> 66 #include <nfsclient/nfs.h> 67 #include <nfsclient/nfsnode.h> 68 69 #include <vm/vm.h> 70 #include <vm/vm_map.h> 71 #include <vm/vm_object.h> 72 73 #include <net/route.h> 74 #include <netinet/in.h> 75 #include <netinet/in_systm.h> 76 #include <netinet/ip.h> 77 #include <netinet/in_pcb.h> 78 79 #include <assert.h> 80 #include <ctype.h> 81 #include <err.h> 82 #include <fcntl.h> 83 #include <kvm.h> 84 #include <libutil.h> 85 #include <limits.h> 86 #include <paths.h> 87 #include <pwd.h> 88 #include <stdio.h> 89 #include <stdlib.h> 90 #include <stddef.h> 91 #include <string.h> 92 #include <unistd.h> 93 #include <netdb.h> 94 95 #include <libprocstat.h> 96 #include "libprocstat_internal.h" 97 #include "common_kvm.h" 98 99 int statfs(const char *, struct statfs *); /* XXX */ 100 101 #define PROCSTAT_KVM 1 102 #define PROCSTAT_SYSCTL 2 103 104 static char *getmnton(kvm_t *kd, struct mount *m); 105 static struct filestat_list *procstat_getfiles_kvm( 106 struct procstat *procstat, struct kinfo_proc *kp, int mmapped); 107 static struct filestat_list *procstat_getfiles_sysctl( 108 struct procstat *procstat, struct kinfo_proc *kp, int mmapped); 109 static int procstat_get_pipe_info_sysctl(struct filestat *fst, 110 struct pipestat *pipe, char *errbuf); 111 static int procstat_get_pipe_info_kvm(kvm_t *kd, struct filestat *fst, 112 struct pipestat *pipe, char *errbuf); 113 static int procstat_get_pts_info_sysctl(struct filestat *fst, 114 struct ptsstat *pts, char *errbuf); 115 static int procstat_get_pts_info_kvm(kvm_t *kd, struct filestat *fst, 116 struct ptsstat *pts, char *errbuf); 117 static int procstat_get_socket_info_sysctl(struct filestat *fst, 118 struct sockstat *sock, char *errbuf); 119 static int procstat_get_socket_info_kvm(kvm_t *kd, struct filestat *fst, 120 struct sockstat *sock, char *errbuf); 121 static int to_filestat_flags(int flags); 122 static int procstat_get_vnode_info_kvm(kvm_t *kd, struct filestat *fst, 123 struct vnstat *vn, char *errbuf); 124 static int procstat_get_vnode_info_sysctl(struct filestat *fst, 125 struct vnstat *vn, char *errbuf); 126 static int vntype2psfsttype(int type); 127 128 void 129 procstat_close(struct procstat *procstat) 130 { 131 132 assert(procstat); 133 if (procstat->type == PROCSTAT_KVM) 134 kvm_close(procstat->kd); 135 free(procstat); 136 } 137 138 struct procstat * 139 procstat_open_sysctl(void) 140 { 141 struct procstat *procstat; 142 143 procstat = calloc(1, sizeof(*procstat)); 144 if (procstat == NULL) { 145 warn("malloc()"); 146 return (NULL); 147 } 148 procstat->type = PROCSTAT_SYSCTL; 149 return (procstat); 150 } 151 152 struct procstat * 153 procstat_open_kvm(const char *nlistf, const char *memf) 154 { 155 struct procstat *procstat; 156 kvm_t *kd; 157 char buf[_POSIX2_LINE_MAX]; 158 159 procstat = calloc(1, sizeof(*procstat)); 160 if (procstat == NULL) { 161 warn("malloc()"); 162 return (NULL); 163 } 164 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf); 165 if (kd == NULL) { 166 warnx("kvm_openfiles(): %s", buf); 167 free(procstat); 168 return (NULL); 169 } 170 procstat->type = PROCSTAT_KVM; 171 procstat->kd = kd; 172 return (procstat); 173 } 174 175 struct kinfo_proc * 176 procstat_getprocs(struct procstat *procstat, int what, int arg, 177 unsigned int *count) 178 { 179 struct kinfo_proc *p0, *p; 180 size_t len; 181 int name[4]; 182 int error; 183 184 assert(procstat); 185 assert(count); 186 p = NULL; 187 if (procstat->type == PROCSTAT_KVM) { 188 p0 = kvm_getprocs(procstat->kd, what, arg, count); 189 if (p0 == NULL || count == 0) 190 return (NULL); 191 len = *count * sizeof(*p); 192 p = malloc(len); 193 if (p == NULL) { 194 warnx("malloc(%zu)", len); 195 goto fail; 196 } 197 bcopy(p0, p, len); 198 return (p); 199 } else if (procstat->type == PROCSTAT_SYSCTL) { 200 len = 0; 201 name[0] = CTL_KERN; 202 name[1] = KERN_PROC; 203 name[2] = what; 204 name[3] = arg; 205 error = sysctl(name, 4, NULL, &len, NULL, 0); 206 if (error < 0 && errno != EPERM) { 207 warn("sysctl(kern.proc)"); 208 goto fail; 209 } 210 if (len == 0) { 211 warnx("no processes?"); 212 goto fail; 213 } 214 p = malloc(len); 215 if (p == NULL) { 216 warnx("malloc(%zu)", len); 217 goto fail; 218 } 219 error = sysctl(name, 4, p, &len, NULL, 0); 220 if (error < 0 && errno != EPERM) { 221 warn("sysctl(kern.proc)"); 222 goto fail; 223 } 224 /* Perform simple consistency checks. */ 225 if ((len % sizeof(*p)) != 0 || p->ki_structsize != sizeof(*p)) { 226 warnx("kinfo_proc structure size mismatch"); 227 goto fail; 228 } 229 *count = len / sizeof(*p); 230 return (p); 231 } else { 232 warnx("unknown access method"); 233 return (NULL); 234 } 235 fail: 236 if (p) 237 free(p); 238 return (NULL); 239 } 240 241 void 242 procstat_freeprocs(struct procstat *procstat __unused, struct kinfo_proc *p) 243 { 244 245 if (p != NULL) 246 free(p); 247 p = NULL; 248 } 249 250 struct filestat_list * 251 procstat_getfiles(struct procstat *procstat, struct kinfo_proc *kp, int mmapped) 252 { 253 254 if (procstat->type == PROCSTAT_SYSCTL) 255 return (procstat_getfiles_sysctl(procstat, kp, mmapped)); 256 else if (procstat->type == PROCSTAT_KVM) 257 return (procstat_getfiles_kvm(procstat, kp, mmapped)); 258 else 259 return (NULL); 260 } 261 262 void 263 procstat_freefiles(struct procstat *procstat, struct filestat_list *head) 264 { 265 struct filestat *fst, *tmp; 266 267 STAILQ_FOREACH_SAFE(fst, head, next, tmp) { 268 if (fst->fs_path != NULL) 269 free(fst->fs_path); 270 free(fst); 271 } 272 free(head); 273 if (procstat->vmentries != NULL) { 274 free (procstat->vmentries); 275 procstat->vmentries = NULL; 276 } 277 if (procstat->files != NULL) { 278 free (procstat->files); 279 procstat->files = NULL; 280 } 281 } 282 283 static struct filestat * 284 filestat_new_entry(void *typedep, int type, int fd, int fflags, int uflags, 285 int refcount, off_t offset, char *path) 286 { 287 struct filestat *entry; 288 289 entry = calloc(1, sizeof(*entry)); 290 if (entry == NULL) { 291 warn("malloc()"); 292 return (NULL); 293 } 294 entry->fs_typedep = typedep; 295 entry->fs_fflags = fflags; 296 entry->fs_uflags = uflags; 297 entry->fs_fd = fd; 298 entry->fs_type = type; 299 entry->fs_ref_count = refcount; 300 entry->fs_offset = offset; 301 entry->fs_path = path; 302 return (entry); 303 } 304 305 static struct vnode * 306 getctty(kvm_t *kd, struct kinfo_proc *kp) 307 { 308 struct pgrp pgrp; 309 struct proc proc; 310 struct session sess; 311 int error; 312 313 assert(kp); 314 error = kvm_read_all(kd, (unsigned long)kp->ki_paddr, &proc, 315 sizeof(proc)); 316 if (error == 0) { 317 warnx("can't read proc struct at %p for pid %d", 318 kp->ki_paddr, kp->ki_pid); 319 return (NULL); 320 } 321 if (proc.p_pgrp == NULL) 322 return (NULL); 323 error = kvm_read_all(kd, (unsigned long)proc.p_pgrp, &pgrp, 324 sizeof(pgrp)); 325 if (error == 0) { 326 warnx("can't read pgrp struct at %p for pid %d", 327 proc.p_pgrp, kp->ki_pid); 328 return (NULL); 329 } 330 error = kvm_read_all(kd, (unsigned long)pgrp.pg_session, &sess, 331 sizeof(sess)); 332 if (error == 0) { 333 warnx("can't read session struct at %p for pid %d", 334 pgrp.pg_session, kp->ki_pid); 335 return (NULL); 336 } 337 return (sess.s_ttyvp); 338 } 339 340 static struct filestat_list * 341 procstat_getfiles_kvm(struct procstat *procstat, struct kinfo_proc *kp, int mmapped) 342 { 343 struct file file; 344 struct filedesc filed; 345 struct vm_map_entry vmentry; 346 struct vm_object object; 347 struct vmspace vmspace; 348 vm_map_entry_t entryp; 349 vm_map_t map; 350 vm_object_t objp; 351 struct vnode *vp; 352 struct file **ofiles; 353 struct filestat *entry; 354 struct filestat_list *head; 355 kvm_t *kd; 356 void *data; 357 int i, fflags; 358 int prot, type; 359 unsigned int nfiles; 360 361 assert(procstat); 362 kd = procstat->kd; 363 if (kd == NULL) 364 return (NULL); 365 if (kp->ki_fd == NULL) 366 return (NULL); 367 if (!kvm_read_all(kd, (unsigned long)kp->ki_fd, &filed, 368 sizeof(filed))) { 369 warnx("can't read filedesc at %p", (void *)kp->ki_fd); 370 return (NULL); 371 } 372 373 /* 374 * Allocate list head. 375 */ 376 head = malloc(sizeof(*head)); 377 if (head == NULL) 378 return (NULL); 379 STAILQ_INIT(head); 380 381 /* root directory vnode, if one. */ 382 if (filed.fd_rdir) { 383 entry = filestat_new_entry(filed.fd_rdir, PS_FST_TYPE_VNODE, -1, 384 PS_FST_FFLAG_READ, PS_FST_UFLAG_RDIR, 0, 0, NULL); 385 if (entry != NULL) 386 STAILQ_INSERT_TAIL(head, entry, next); 387 } 388 /* current working directory vnode. */ 389 if (filed.fd_cdir) { 390 entry = filestat_new_entry(filed.fd_cdir, PS_FST_TYPE_VNODE, -1, 391 PS_FST_FFLAG_READ, PS_FST_UFLAG_CDIR, 0, 0, NULL); 392 if (entry != NULL) 393 STAILQ_INSERT_TAIL(head, entry, next); 394 } 395 /* jail root, if any. */ 396 if (filed.fd_jdir) { 397 entry = filestat_new_entry(filed.fd_jdir, PS_FST_TYPE_VNODE, -1, 398 PS_FST_FFLAG_READ, PS_FST_UFLAG_JAIL, 0, 0, NULL); 399 if (entry != NULL) 400 STAILQ_INSERT_TAIL(head, entry, next); 401 } 402 /* ktrace vnode, if one */ 403 if (kp->ki_tracep) { 404 entry = filestat_new_entry(kp->ki_tracep, PS_FST_TYPE_VNODE, -1, 405 PS_FST_FFLAG_READ | PS_FST_FFLAG_WRITE, 406 PS_FST_UFLAG_TRACE, 0, 0, NULL); 407 if (entry != NULL) 408 STAILQ_INSERT_TAIL(head, entry, next); 409 } 410 /* text vnode, if one */ 411 if (kp->ki_textvp) { 412 entry = filestat_new_entry(kp->ki_textvp, PS_FST_TYPE_VNODE, -1, 413 PS_FST_FFLAG_READ, PS_FST_UFLAG_TEXT, 0, 0, NULL); 414 if (entry != NULL) 415 STAILQ_INSERT_TAIL(head, entry, next); 416 } 417 /* Controlling terminal. */ 418 if ((vp = getctty(kd, kp)) != NULL) { 419 entry = filestat_new_entry(vp, PS_FST_TYPE_VNODE, -1, 420 PS_FST_FFLAG_READ | PS_FST_FFLAG_WRITE, 421 PS_FST_UFLAG_CTTY, 0, 0, NULL); 422 if (entry != NULL) 423 STAILQ_INSERT_TAIL(head, entry, next); 424 } 425 426 nfiles = filed.fd_lastfile + 1; 427 ofiles = malloc(nfiles * sizeof(struct file *)); 428 if (ofiles == NULL) { 429 warn("malloc(%zu)", nfiles * sizeof(struct file *)); 430 goto do_mmapped; 431 } 432 if (!kvm_read_all(kd, (unsigned long)filed.fd_ofiles, ofiles, 433 nfiles * sizeof(struct file *))) { 434 warnx("cannot read file structures at %p", 435 (void *)filed.fd_ofiles); 436 free(ofiles); 437 goto do_mmapped; 438 } 439 for (i = 0; i <= filed.fd_lastfile; i++) { 440 if (ofiles[i] == NULL) 441 continue; 442 if (!kvm_read_all(kd, (unsigned long)ofiles[i], &file, 443 sizeof(struct file))) { 444 warnx("can't read file %d at %p", i, 445 (void *)ofiles[i]); 446 continue; 447 } 448 switch (file.f_type) { 449 case DTYPE_VNODE: 450 type = PS_FST_TYPE_VNODE; 451 data = file.f_vnode; 452 break; 453 case DTYPE_SOCKET: 454 type = PS_FST_TYPE_SOCKET; 455 data = file.f_data; 456 break; 457 case DTYPE_PIPE: 458 type = PS_FST_TYPE_PIPE; 459 data = file.f_data; 460 break; 461 case DTYPE_FIFO: 462 type = PS_FST_TYPE_FIFO; 463 data = file.f_vnode; 464 break; 465 #ifdef DTYPE_PTS 466 case DTYPE_PTS: 467 type = PS_FST_TYPE_PTS; 468 data = file.f_data; 469 break; 470 #endif 471 default: 472 continue; 473 } 474 entry = filestat_new_entry(data, type, i, 475 to_filestat_flags(file.f_flag), 0, 0, 0, NULL); 476 if (entry != NULL) 477 STAILQ_INSERT_TAIL(head, entry, next); 478 } 479 free(ofiles); 480 481 do_mmapped: 482 483 /* 484 * Process mmapped files if requested. 485 */ 486 if (mmapped) { 487 if (!kvm_read_all(kd, (unsigned long)kp->ki_vmspace, &vmspace, 488 sizeof(vmspace))) { 489 warnx("can't read vmspace at %p", 490 (void *)kp->ki_vmspace); 491 goto exit; 492 } 493 map = &vmspace.vm_map; 494 495 for (entryp = map->header.next; 496 entryp != &kp->ki_vmspace->vm_map.header; 497 entryp = vmentry.next) { 498 if (!kvm_read_all(kd, (unsigned long)entryp, &vmentry, 499 sizeof(vmentry))) { 500 warnx("can't read vm_map_entry at %p", 501 (void *)entryp); 502 continue; 503 } 504 if (vmentry.eflags & MAP_ENTRY_IS_SUB_MAP) 505 continue; 506 if ((objp = vmentry.object.vm_object) == NULL) 507 continue; 508 for (; objp; objp = object.backing_object) { 509 if (!kvm_read_all(kd, (unsigned long)objp, 510 &object, sizeof(object))) { 511 warnx("can't read vm_object at %p", 512 (void *)objp); 513 break; 514 } 515 } 516 517 /* We want only vnode objects. */ 518 if (object.type != OBJT_VNODE) 519 continue; 520 521 prot = vmentry.protection; 522 fflags = 0; 523 if (prot & VM_PROT_READ) 524 fflags = PS_FST_FFLAG_READ; 525 if (prot & VM_PROT_WRITE) 526 fflags |= PS_FST_FFLAG_WRITE; 527 528 /* 529 * Create filestat entry. 530 */ 531 entry = filestat_new_entry(object.handle, 532 PS_FST_TYPE_VNODE, -1, fflags, 533 PS_FST_UFLAG_MMAP, 0, 0, NULL); 534 if (entry != NULL) 535 STAILQ_INSERT_TAIL(head, entry, next); 536 } 537 } 538 exit: 539 return (head); 540 } 541 542 /* 543 * kinfo types to filestat translation. 544 */ 545 static int 546 kinfo_type2fst(int kftype) 547 { 548 static struct { 549 int kf_type; 550 int fst_type; 551 } kftypes2fst[] = { 552 { KF_TYPE_CRYPTO, PS_FST_TYPE_CRYPTO }, 553 { KF_TYPE_FIFO, PS_FST_TYPE_FIFO }, 554 { KF_TYPE_KQUEUE, PS_FST_TYPE_KQUEUE }, 555 { KF_TYPE_MQUEUE, PS_FST_TYPE_MQUEUE }, 556 { KF_TYPE_NONE, PS_FST_TYPE_NONE }, 557 { KF_TYPE_PIPE, PS_FST_TYPE_PIPE }, 558 { KF_TYPE_PTS, PS_FST_TYPE_PTS }, 559 { KF_TYPE_SEM, PS_FST_TYPE_SEM }, 560 { KF_TYPE_SHM, PS_FST_TYPE_SHM }, 561 { KF_TYPE_SOCKET, PS_FST_TYPE_SOCKET }, 562 { KF_TYPE_VNODE, PS_FST_TYPE_VNODE }, 563 { KF_TYPE_UNKNOWN, PS_FST_TYPE_UNKNOWN } 564 }; 565 #define NKFTYPES (sizeof(kftypes2fst) / sizeof(*kftypes2fst)) 566 unsigned int i; 567 568 for (i = 0; i < NKFTYPES; i++) 569 if (kftypes2fst[i].kf_type == kftype) 570 break; 571 if (i == NKFTYPES) 572 return (PS_FST_TYPE_UNKNOWN); 573 return (kftypes2fst[i].fst_type); 574 } 575 576 /* 577 * kinfo flags to filestat translation. 578 */ 579 static int 580 kinfo_fflags2fst(int kfflags) 581 { 582 static struct { 583 int kf_flag; 584 int fst_flag; 585 } kfflags2fst[] = { 586 { KF_FLAG_APPEND, PS_FST_FFLAG_APPEND }, 587 { KF_FLAG_ASYNC, PS_FST_FFLAG_ASYNC }, 588 { KF_FLAG_CREAT, PS_FST_FFLAG_CREAT }, 589 { KF_FLAG_DIRECT, PS_FST_FFLAG_DIRECT }, 590 { KF_FLAG_EXCL, PS_FST_FFLAG_EXCL }, 591 { KF_FLAG_EXEC, PS_FST_FFLAG_EXEC }, 592 { KF_FLAG_EXLOCK, PS_FST_FFLAG_EXLOCK }, 593 { KF_FLAG_FSYNC, PS_FST_FFLAG_SYNC }, 594 { KF_FLAG_HASLOCK, PS_FST_FFLAG_HASLOCK }, 595 { KF_FLAG_NOFOLLOW, PS_FST_FFLAG_NOFOLLOW }, 596 { KF_FLAG_NONBLOCK, PS_FST_FFLAG_NONBLOCK }, 597 { KF_FLAG_READ, PS_FST_FFLAG_READ }, 598 { KF_FLAG_SHLOCK, PS_FST_FFLAG_SHLOCK }, 599 { KF_FLAG_TRUNC, PS_FST_FFLAG_TRUNC }, 600 { KF_FLAG_WRITE, PS_FST_FFLAG_WRITE } 601 }; 602 #define NKFFLAGS (sizeof(kfflags2fst) / sizeof(*kfflags2fst)) 603 unsigned int i; 604 int flags; 605 606 flags = 0; 607 for (i = 0; i < NKFFLAGS; i++) 608 if ((kfflags & kfflags2fst[i].kf_flag) != 0) 609 flags |= kfflags2fst[i].fst_flag; 610 return (flags); 611 } 612 613 static int 614 kinfo_uflags2fst(int fd) 615 { 616 617 switch (fd) { 618 case KF_FD_TYPE_CTTY: 619 return (PS_FST_UFLAG_CTTY); 620 case KF_FD_TYPE_CWD: 621 return (PS_FST_UFLAG_CDIR); 622 case KF_FD_TYPE_JAIL: 623 return (PS_FST_UFLAG_JAIL); 624 case KF_FD_TYPE_TEXT: 625 return (PS_FST_UFLAG_TEXT); 626 case KF_FD_TYPE_TRACE: 627 return (PS_FST_UFLAG_TRACE); 628 case KF_FD_TYPE_ROOT: 629 return (PS_FST_UFLAG_RDIR); 630 } 631 return (0); 632 } 633 634 static struct filestat_list * 635 procstat_getfiles_sysctl(struct procstat *procstat, struct kinfo_proc *kp, int mmapped) 636 { 637 struct kinfo_file *kif, *files; 638 struct kinfo_vmentry *kve, *vmentries; 639 struct filestat_list *head; 640 struct filestat *entry; 641 char *path; 642 off_t offset; 643 int cnt, fd, fflags; 644 int i, type, uflags; 645 int refcount; 646 647 assert(kp); 648 if (kp->ki_fd == NULL) 649 return (NULL); 650 651 files = kinfo_getfile(kp->ki_pid, &cnt); 652 if (files == NULL && errno != EPERM) { 653 warn("kinfo_getfile()"); 654 return (NULL); 655 } 656 procstat->files = files; 657 658 /* 659 * Allocate list head. 660 */ 661 head = malloc(sizeof(*head)); 662 if (head == NULL) 663 return (NULL); 664 STAILQ_INIT(head); 665 for (i = 0; i < cnt; i++) { 666 kif = &files[i]; 667 668 type = kinfo_type2fst(kif->kf_type); 669 fd = kif->kf_fd >= 0 ? kif->kf_fd : -1; 670 fflags = kinfo_fflags2fst(kif->kf_flags); 671 uflags = kinfo_uflags2fst(kif->kf_fd); 672 refcount = kif->kf_ref_count; 673 offset = kif->kf_offset; 674 if (*kif->kf_path != '\0') 675 path = strdup(kif->kf_path); 676 else 677 path = NULL; 678 679 /* 680 * Create filestat entry. 681 */ 682 entry = filestat_new_entry(kif, type, fd, fflags, uflags, 683 refcount, offset, path); 684 if (entry != NULL) 685 STAILQ_INSERT_TAIL(head, entry, next); 686 } 687 if (mmapped != 0) { 688 vmentries = kinfo_getvmmap(kp->ki_pid, &cnt); 689 procstat->vmentries = vmentries; 690 if (vmentries == NULL || cnt == 0) 691 goto fail; 692 for (i = 0; i < cnt; i++) { 693 kve = &vmentries[i]; 694 if (kve->kve_type != KVME_TYPE_VNODE) 695 continue; 696 fflags = 0; 697 if (kve->kve_protection & KVME_PROT_READ) 698 fflags = PS_FST_FFLAG_READ; 699 if (kve->kve_protection & KVME_PROT_WRITE) 700 fflags |= PS_FST_FFLAG_WRITE; 701 offset = kve->kve_offset; 702 refcount = kve->kve_ref_count; 703 if (*kve->kve_path != '\0') 704 path = strdup(kve->kve_path); 705 else 706 path = NULL; 707 entry = filestat_new_entry(kve, PS_FST_TYPE_VNODE, -1, 708 fflags, PS_FST_UFLAG_MMAP, refcount, offset, path); 709 if (entry != NULL) 710 STAILQ_INSERT_TAIL(head, entry, next); 711 } 712 } 713 fail: 714 return (head); 715 } 716 717 int 718 procstat_get_pipe_info(struct procstat *procstat, struct filestat *fst, 719 struct pipestat *ps, char *errbuf) 720 { 721 722 assert(ps); 723 if (procstat->type == PROCSTAT_KVM) { 724 return (procstat_get_pipe_info_kvm(procstat->kd, fst, ps, 725 errbuf)); 726 } else if (procstat->type == PROCSTAT_SYSCTL) { 727 return (procstat_get_pipe_info_sysctl(fst, ps, errbuf)); 728 } else { 729 warnx("unknow access method: %d", procstat->type); 730 snprintf(errbuf, _POSIX2_LINE_MAX, "error"); 731 return (1); 732 } 733 } 734 735 static int 736 procstat_get_pipe_info_kvm(kvm_t *kd, struct filestat *fst, 737 struct pipestat *ps, char *errbuf) 738 { 739 struct pipe pi; 740 void *pipep; 741 742 assert(kd); 743 assert(ps); 744 assert(fst); 745 bzero(ps, sizeof(*ps)); 746 pipep = fst->fs_typedep; 747 if (pipep == NULL) 748 goto fail; 749 if (!kvm_read_all(kd, (unsigned long)pipep, &pi, sizeof(struct pipe))) { 750 warnx("can't read pipe at %p", (void *)pipep); 751 goto fail; 752 } 753 ps->addr = (uintptr_t)pipep; 754 ps->peer = (uintptr_t)pi.pipe_peer; 755 ps->buffer_cnt = pi.pipe_buffer.cnt; 756 return (0); 757 758 fail: 759 snprintf(errbuf, _POSIX2_LINE_MAX, "error"); 760 return (1); 761 } 762 763 static int 764 procstat_get_pipe_info_sysctl(struct filestat *fst, struct pipestat *ps, 765 char *errbuf __unused) 766 { 767 struct kinfo_file *kif; 768 769 assert(ps); 770 assert(fst); 771 bzero(ps, sizeof(*ps)); 772 kif = fst->fs_typedep; 773 if (kif == NULL) 774 return (1); 775 ps->addr = kif->kf_un.kf_pipe.kf_pipe_addr; 776 ps->peer = kif->kf_un.kf_pipe.kf_pipe_peer; 777 ps->buffer_cnt = kif->kf_un.kf_pipe.kf_pipe_buffer_cnt; 778 return (0); 779 } 780 781 int 782 procstat_get_pts_info(struct procstat *procstat, struct filestat *fst, 783 struct ptsstat *pts, char *errbuf) 784 { 785 786 assert(pts); 787 if (procstat->type == PROCSTAT_KVM) { 788 return (procstat_get_pts_info_kvm(procstat->kd, fst, pts, 789 errbuf)); 790 } else if (procstat->type == PROCSTAT_SYSCTL) { 791 return (procstat_get_pts_info_sysctl(fst, pts, errbuf)); 792 } else { 793 warnx("unknow access method: %d", procstat->type); 794 snprintf(errbuf, _POSIX2_LINE_MAX, "error"); 795 return (1); 796 } 797 } 798 799 static int 800 procstat_get_pts_info_kvm(kvm_t *kd, struct filestat *fst, 801 struct ptsstat *pts, char *errbuf) 802 { 803 struct tty tty; 804 void *ttyp; 805 806 assert(kd); 807 assert(pts); 808 assert(fst); 809 bzero(pts, sizeof(*pts)); 810 ttyp = fst->fs_typedep; 811 if (ttyp == NULL) 812 goto fail; 813 if (!kvm_read_all(kd, (unsigned long)ttyp, &tty, sizeof(struct tty))) { 814 warnx("can't read tty at %p", (void *)ttyp); 815 goto fail; 816 } 817 pts->dev = dev2udev(kd, tty.t_dev); 818 (void)kdevtoname(kd, tty.t_dev, pts->devname); 819 return (0); 820 821 fail: 822 snprintf(errbuf, _POSIX2_LINE_MAX, "error"); 823 return (1); 824 } 825 826 static int 827 procstat_get_pts_info_sysctl(struct filestat *fst, struct ptsstat *pts, 828 char *errbuf __unused) 829 { 830 struct kinfo_file *kif; 831 832 assert(pts); 833 assert(fst); 834 bzero(pts, sizeof(*pts)); 835 kif = fst->fs_typedep; 836 if (kif == NULL) 837 return (0); 838 pts->dev = kif->kf_un.kf_pts.kf_pts_dev; 839 strlcpy(pts->devname, kif->kf_path, sizeof(pts->devname)); 840 return (0); 841 } 842 843 int 844 procstat_get_vnode_info(struct procstat *procstat, struct filestat *fst, 845 struct vnstat *vn, char *errbuf) 846 { 847 848 assert(vn); 849 if (procstat->type == PROCSTAT_KVM) { 850 return (procstat_get_vnode_info_kvm(procstat->kd, fst, vn, 851 errbuf)); 852 } else if (procstat->type == PROCSTAT_SYSCTL) { 853 return (procstat_get_vnode_info_sysctl(fst, vn, errbuf)); 854 } else { 855 warnx("unknow access method: %d", procstat->type); 856 snprintf(errbuf, _POSIX2_LINE_MAX, "error"); 857 return (1); 858 } 859 } 860 861 static int 862 procstat_get_vnode_info_kvm(kvm_t *kd, struct filestat *fst, 863 struct vnstat *vn, char *errbuf) 864 { 865 /* Filesystem specific handlers. */ 866 #define FSTYPE(fst) {#fst, fst##_filestat} 867 struct { 868 const char *tag; 869 int (*handler)(kvm_t *kd, struct vnode *vp, 870 struct vnstat *vn); 871 } fstypes[] = { 872 FSTYPE(devfs), 873 FSTYPE(isofs), 874 FSTYPE(msdosfs), 875 FSTYPE(nfs), 876 FSTYPE(ntfs), 877 #ifdef LIBPROCSTAT_NWFS 878 FSTYPE(nwfs), 879 #endif 880 FSTYPE(smbfs), 881 FSTYPE(udf), 882 FSTYPE(ufs), 883 #ifdef LIBPROCSTAT_ZFS 884 FSTYPE(zfs), 885 #endif 886 }; 887 #define NTYPES (sizeof(fstypes) / sizeof(*fstypes)) 888 struct vnode vnode; 889 char tagstr[12]; 890 void *vp; 891 int error, found; 892 unsigned int i; 893 894 assert(kd); 895 assert(vn); 896 assert(fst); 897 vp = fst->fs_typedep; 898 if (vp == NULL) 899 goto fail; 900 error = kvm_read_all(kd, (unsigned long)vp, &vnode, sizeof(vnode)); 901 if (error == 0) { 902 warnx("can't read vnode at %p", (void *)vp); 903 goto fail; 904 } 905 bzero(vn, sizeof(*vn)); 906 vn->vn_type = vntype2psfsttype(vnode.v_type); 907 if (vnode.v_type == VNON || vnode.v_type == VBAD) 908 return (0); 909 error = kvm_read_all(kd, (unsigned long)vnode.v_tag, tagstr, 910 sizeof(tagstr)); 911 if (error == 0) { 912 warnx("can't read v_tag at %p", (void *)vp); 913 goto fail; 914 } 915 tagstr[sizeof(tagstr) - 1] = '\0'; 916 917 /* 918 * Find appropriate handler. 919 */ 920 for (i = 0, found = 0; i < NTYPES; i++) 921 if (!strcmp(fstypes[i].tag, tagstr)) { 922 if (fstypes[i].handler(kd, &vnode, vn) != 0) { 923 goto fail; 924 } 925 break; 926 } 927 if (i == NTYPES) { 928 snprintf(errbuf, _POSIX2_LINE_MAX, "?(%s)", tagstr); 929 return (1); 930 } 931 vn->vn_mntdir = getmnton(kd, vnode.v_mount); 932 if ((vnode.v_type == VBLK || vnode.v_type == VCHR) && 933 vnode.v_rdev != NULL){ 934 vn->vn_dev = dev2udev(kd, vnode.v_rdev); 935 (void)kdevtoname(kd, vnode.v_rdev, vn->vn_devname); 936 } else { 937 vn->vn_dev = -1; 938 } 939 return (0); 940 941 fail: 942 snprintf(errbuf, _POSIX2_LINE_MAX, "error"); 943 return (1); 944 } 945 946 /* 947 * kinfo vnode type to filestat translation. 948 */ 949 static int 950 kinfo_vtype2fst(int kfvtype) 951 { 952 static struct { 953 int kf_vtype; 954 int fst_vtype; 955 } kfvtypes2fst[] = { 956 { KF_VTYPE_VBAD, PS_FST_VTYPE_VBAD }, 957 { KF_VTYPE_VBLK, PS_FST_VTYPE_VBLK }, 958 { KF_VTYPE_VCHR, PS_FST_VTYPE_VCHR }, 959 { KF_VTYPE_VDIR, PS_FST_VTYPE_VDIR }, 960 { KF_VTYPE_VFIFO, PS_FST_VTYPE_VFIFO }, 961 { KF_VTYPE_VLNK, PS_FST_VTYPE_VLNK }, 962 { KF_VTYPE_VNON, PS_FST_VTYPE_VNON }, 963 { KF_VTYPE_VREG, PS_FST_VTYPE_VREG }, 964 { KF_VTYPE_VSOCK, PS_FST_VTYPE_VSOCK } 965 }; 966 #define NKFVTYPES (sizeof(kfvtypes2fst) / sizeof(*kfvtypes2fst)) 967 unsigned int i; 968 969 for (i = 0; i < NKFVTYPES; i++) 970 if (kfvtypes2fst[i].kf_vtype == kfvtype) 971 break; 972 if (i == NKFVTYPES) 973 return (PS_FST_VTYPE_UNKNOWN); 974 return (kfvtypes2fst[i].fst_vtype); 975 } 976 977 static int 978 procstat_get_vnode_info_sysctl(struct filestat *fst, struct vnstat *vn, 979 char *errbuf) 980 { 981 struct statfs stbuf; 982 struct kinfo_file *kif; 983 struct kinfo_vmentry *kve; 984 uint64_t fileid; 985 uint64_t size; 986 char *name, *path; 987 uint32_t fsid; 988 uint16_t mode; 989 uint32_t rdev; 990 int vntype; 991 int status; 992 993 assert(fst); 994 assert(vn); 995 bzero(vn, sizeof(*vn)); 996 if (fst->fs_typedep == NULL) 997 return (1); 998 if (fst->fs_uflags & PS_FST_UFLAG_MMAP) { 999 kve = fst->fs_typedep; 1000 fileid = kve->kve_vn_fileid; 1001 fsid = kve->kve_vn_fsid; 1002 mode = kve->kve_vn_mode; 1003 path = kve->kve_path; 1004 rdev = kve->kve_vn_rdev; 1005 size = kve->kve_vn_size; 1006 vntype = kinfo_vtype2fst(kve->kve_vn_type); 1007 status = kve->kve_status; 1008 } else { 1009 kif = fst->fs_typedep; 1010 fileid = kif->kf_un.kf_file.kf_file_fileid; 1011 fsid = kif->kf_un.kf_file.kf_file_fsid; 1012 mode = kif->kf_un.kf_file.kf_file_mode; 1013 path = kif->kf_path; 1014 rdev = kif->kf_un.kf_file.kf_file_rdev; 1015 size = kif->kf_un.kf_file.kf_file_size; 1016 vntype = kinfo_vtype2fst(kif->kf_vnode_type); 1017 status = kif->kf_status; 1018 } 1019 vn->vn_type = vntype; 1020 if (vntype == PS_FST_VTYPE_VNON || vntype == PS_FST_VTYPE_VBAD) 1021 return (0); 1022 if ((status & KF_ATTR_VALID) == 0) { 1023 snprintf(errbuf, _POSIX2_LINE_MAX, "? (no info available)"); 1024 return (1); 1025 } 1026 if (path && *path) { 1027 statfs(path, &stbuf); 1028 vn->vn_mntdir = strdup(stbuf.f_mntonname); 1029 } else 1030 vn->vn_mntdir = strdup("-"); 1031 vn->vn_dev = rdev; 1032 if (vntype == PS_FST_VTYPE_VBLK) { 1033 name = devname(rdev, S_IFBLK); 1034 if (name != NULL) 1035 strlcpy(vn->vn_devname, name, 1036 sizeof(vn->vn_devname)); 1037 } else if (vntype == PS_FST_VTYPE_VCHR) { 1038 name = devname(vn->vn_dev, S_IFCHR); 1039 if (name != NULL) 1040 strlcpy(vn->vn_devname, name, 1041 sizeof(vn->vn_devname)); 1042 } 1043 vn->vn_fsid = fsid; 1044 vn->vn_fileid = fileid; 1045 vn->vn_size = size; 1046 vn->vn_mode = mode; 1047 return (0); 1048 } 1049 1050 int 1051 procstat_get_socket_info(struct procstat *procstat, struct filestat *fst, 1052 struct sockstat *sock, char *errbuf) 1053 { 1054 1055 assert(sock); 1056 if (procstat->type == PROCSTAT_KVM) { 1057 return (procstat_get_socket_info_kvm(procstat->kd, fst, sock, 1058 errbuf)); 1059 } else if (procstat->type == PROCSTAT_SYSCTL) { 1060 return (procstat_get_socket_info_sysctl(fst, sock, errbuf)); 1061 } else { 1062 warnx("unknow access method: %d", procstat->type); 1063 snprintf(errbuf, _POSIX2_LINE_MAX, "error"); 1064 return (1); 1065 } 1066 } 1067 1068 static int 1069 procstat_get_socket_info_kvm(kvm_t *kd, struct filestat *fst, 1070 struct sockstat *sock, char *errbuf) 1071 { 1072 struct domain dom; 1073 struct inpcb inpcb; 1074 struct protosw proto; 1075 struct socket s; 1076 struct unpcb unpcb; 1077 ssize_t len; 1078 void *so; 1079 1080 assert(kd); 1081 assert(sock); 1082 assert(fst); 1083 bzero(sock, sizeof(*sock)); 1084 so = fst->fs_typedep; 1085 if (so == NULL) 1086 goto fail; 1087 sock->so_addr = (uintptr_t)so; 1088 /* fill in socket */ 1089 if (!kvm_read_all(kd, (unsigned long)so, &s, 1090 sizeof(struct socket))) { 1091 warnx("can't read sock at %p", (void *)so); 1092 goto fail; 1093 } 1094 /* fill in protosw entry */ 1095 if (!kvm_read_all(kd, (unsigned long)s.so_proto, &proto, 1096 sizeof(struct protosw))) { 1097 warnx("can't read protosw at %p", (void *)s.so_proto); 1098 goto fail; 1099 } 1100 /* fill in domain */ 1101 if (!kvm_read_all(kd, (unsigned long)proto.pr_domain, &dom, 1102 sizeof(struct domain))) { 1103 warnx("can't read domain at %p", 1104 (void *)proto.pr_domain); 1105 goto fail; 1106 } 1107 if ((len = kvm_read(kd, (unsigned long)dom.dom_name, sock->dname, 1108 sizeof(sock->dname) - 1)) < 0) { 1109 warnx("can't read domain name at %p", (void *)dom.dom_name); 1110 sock->dname[0] = '\0'; 1111 } 1112 else 1113 sock->dname[len] = '\0'; 1114 1115 /* 1116 * Fill in known data. 1117 */ 1118 sock->type = s.so_type; 1119 sock->proto = proto.pr_protocol; 1120 sock->dom_family = dom.dom_family; 1121 sock->so_pcb = (uintptr_t)s.so_pcb; 1122 1123 /* 1124 * Protocol specific data. 1125 */ 1126 switch(dom.dom_family) { 1127 case AF_INET: 1128 case AF_INET6: 1129 if (proto.pr_protocol == IPPROTO_TCP) { 1130 if (s.so_pcb) { 1131 if (kvm_read(kd, (u_long)s.so_pcb, 1132 (char *)&inpcb, sizeof(struct inpcb)) 1133 != sizeof(struct inpcb)) { 1134 warnx("can't read inpcb at %p", 1135 (void *)s.so_pcb); 1136 } else 1137 sock->inp_ppcb = 1138 (uintptr_t)inpcb.inp_ppcb; 1139 } 1140 } 1141 break; 1142 case AF_UNIX: 1143 if (s.so_pcb) { 1144 if (kvm_read(kd, (u_long)s.so_pcb, (char *)&unpcb, 1145 sizeof(struct unpcb)) != sizeof(struct unpcb)){ 1146 warnx("can't read unpcb at %p", 1147 (void *)s.so_pcb); 1148 } else if (unpcb.unp_conn) { 1149 sock->so_rcv_sb_state = s.so_rcv.sb_state; 1150 sock->so_snd_sb_state = s.so_snd.sb_state; 1151 sock->unp_conn = (uintptr_t)unpcb.unp_conn; 1152 } 1153 } 1154 break; 1155 default: 1156 break; 1157 } 1158 return (0); 1159 1160 fail: 1161 snprintf(errbuf, _POSIX2_LINE_MAX, "error"); 1162 return (1); 1163 } 1164 1165 static int 1166 procstat_get_socket_info_sysctl(struct filestat *fst, struct sockstat *sock, 1167 char *errbuf __unused) 1168 { 1169 struct kinfo_file *kif; 1170 1171 assert(sock); 1172 assert(fst); 1173 bzero(sock, sizeof(*sock)); 1174 kif = fst->fs_typedep; 1175 if (kif == NULL) 1176 return (0); 1177 1178 /* 1179 * Fill in known data. 1180 */ 1181 sock->type = kif->kf_sock_type; 1182 sock->proto = kif->kf_sock_protocol; 1183 sock->dom_family = kif->kf_sock_domain; 1184 sock->so_pcb = kif->kf_un.kf_sock.kf_sock_pcb; 1185 strlcpy(sock->dname, kif->kf_path, sizeof(sock->dname)); 1186 bcopy(&kif->kf_sa_local, &sock->sa_local, kif->kf_sa_local.ss_len); 1187 bcopy(&kif->kf_sa_peer, &sock->sa_peer, kif->kf_sa_peer.ss_len); 1188 1189 /* 1190 * Protocol specific data. 1191 */ 1192 switch(sock->dom_family) { 1193 case AF_INET: 1194 case AF_INET6: 1195 if (sock->proto == IPPROTO_TCP) 1196 sock->inp_ppcb = kif->kf_un.kf_sock.kf_sock_inpcb; 1197 break; 1198 case AF_UNIX: 1199 if (kif->kf_un.kf_sock.kf_sock_unpconn != 0) { 1200 sock->so_rcv_sb_state = 1201 kif->kf_un.kf_sock.kf_sock_rcv_sb_state; 1202 sock->so_snd_sb_state = 1203 kif->kf_un.kf_sock.kf_sock_snd_sb_state; 1204 sock->unp_conn = 1205 kif->kf_un.kf_sock.kf_sock_unpconn; 1206 } 1207 break; 1208 default: 1209 break; 1210 } 1211 return (0); 1212 } 1213 1214 /* 1215 * Descriptor flags to filestat translation. 1216 */ 1217 static int 1218 to_filestat_flags(int flags) 1219 { 1220 static struct { 1221 int flag; 1222 int fst_flag; 1223 } fstflags[] = { 1224 { FREAD, PS_FST_FFLAG_READ }, 1225 { FWRITE, PS_FST_FFLAG_WRITE }, 1226 { O_APPEND, PS_FST_FFLAG_APPEND }, 1227 { O_ASYNC, PS_FST_FFLAG_ASYNC }, 1228 { O_CREAT, PS_FST_FFLAG_CREAT }, 1229 { O_DIRECT, PS_FST_FFLAG_DIRECT }, 1230 { O_EXCL, PS_FST_FFLAG_EXCL }, 1231 { O_EXEC, PS_FST_FFLAG_EXEC }, 1232 { O_EXLOCK, PS_FST_FFLAG_EXLOCK }, 1233 { O_NOFOLLOW, PS_FST_FFLAG_NOFOLLOW }, 1234 { O_NONBLOCK, PS_FST_FFLAG_NONBLOCK }, 1235 { O_SHLOCK, PS_FST_FFLAG_SHLOCK }, 1236 { O_SYNC, PS_FST_FFLAG_SYNC }, 1237 { O_TRUNC, PS_FST_FFLAG_TRUNC } 1238 }; 1239 #define NFSTFLAGS (sizeof(fstflags) / sizeof(*fstflags)) 1240 int fst_flags; 1241 unsigned int i; 1242 1243 fst_flags = 0; 1244 for (i = 0; i < NFSTFLAGS; i++) 1245 if (flags & fstflags[i].flag) 1246 fst_flags |= fstflags[i].fst_flag; 1247 return (fst_flags); 1248 } 1249 1250 /* 1251 * Vnode type to filestate translation. 1252 */ 1253 static int 1254 vntype2psfsttype(int type) 1255 { 1256 static struct { 1257 int vtype; 1258 int fst_vtype; 1259 } vt2fst[] = { 1260 { VBAD, PS_FST_VTYPE_VBAD }, 1261 { VBLK, PS_FST_VTYPE_VBLK }, 1262 { VCHR, PS_FST_VTYPE_VCHR }, 1263 { VDIR, PS_FST_VTYPE_VDIR }, 1264 { VFIFO, PS_FST_VTYPE_VFIFO }, 1265 { VLNK, PS_FST_VTYPE_VLNK }, 1266 { VNON, PS_FST_VTYPE_VNON }, 1267 { VREG, PS_FST_VTYPE_VREG }, 1268 { VSOCK, PS_FST_VTYPE_VSOCK } 1269 }; 1270 #define NVFTYPES (sizeof(vt2fst) / sizeof(*vt2fst)) 1271 unsigned int i, fst_type; 1272 1273 fst_type = PS_FST_VTYPE_UNKNOWN; 1274 for (i = 0; i < NVFTYPES; i++) { 1275 if (type == vt2fst[i].vtype) { 1276 fst_type = vt2fst[i].fst_vtype; 1277 break; 1278 } 1279 } 1280 return (fst_type); 1281 } 1282 1283 static char * 1284 getmnton(kvm_t *kd, struct mount *m) 1285 { 1286 struct mount mnt; 1287 static struct mtab { 1288 struct mtab *next; 1289 struct mount *m; 1290 char mntonname[MNAMELEN + 1]; 1291 } *mhead = NULL; 1292 struct mtab *mt; 1293 1294 for (mt = mhead; mt != NULL; mt = mt->next) 1295 if (m == mt->m) 1296 return (mt->mntonname); 1297 if (!kvm_read_all(kd, (unsigned long)m, &mnt, sizeof(struct mount))) { 1298 warnx("can't read mount table at %p", (void *)m); 1299 return (NULL); 1300 } 1301 if ((mt = malloc(sizeof (struct mtab))) == NULL) 1302 err(1, NULL); 1303 mt->m = m; 1304 bcopy(&mnt.mnt_stat.f_mntonname[0], &mt->mntonname[0], MNAMELEN); 1305 mt->mntonname[MNAMELEN] = '\0'; 1306 mt->next = mhead; 1307 mhead = mt; 1308 return (mt->mntonname); 1309 } 1310