1 /*- 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1988, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)fstat.c 8.3 (Berkeley) 5/2/95 31 * $FreeBSD: src/usr.bin/fstat/fstat.c,v 1.21.2.7 2001/11/21 10:49:37 dwmalone Exp $ 32 */ 33 34 #include <sys/user.h> 35 #include <sys/param.h> 36 #include <sys/time.h> 37 #include <sys/stat.h> 38 #include <sys/vnode.h> 39 #include <sys/socket.h> 40 #include <sys/socketvar.h> 41 #include <sys/domain.h> 42 #include <sys/protosw.h> 43 #include <sys/un.h> 44 #include <sys/unpcb.h> 45 #include <sys/sysctl.h> 46 #include <sys/filedesc.h> 47 #include <sys/queue.h> 48 #include <sys/pipe.h> 49 #include <sys/conf.h> 50 #include <sys/file.h> 51 #include <sys/ktrace.h> 52 #include <vfs/ufs/quota.h> 53 #include <vfs/ufs/inode.h> 54 #include <sys/mount.h> 55 #include <sys/namecache.h> 56 #include <vfs/nfs/nfsproto.h> 57 #include <vfs/nfs/rpcv2.h> 58 #include <vfs/nfs/nfs.h> 59 #include <vfs/nfs/nfsnode.h> 60 #include <sys/devfs.h> 61 62 #include <vm/vm.h> 63 #include <vm/vm_map.h> 64 #include <vm/vm_object.h> 65 66 #include <net/route.h> 67 #include <netinet/in.h> 68 #include <netinet/in_systm.h> 69 #include <netinet/ip.h> 70 #include <netinet/in_pcb.h> 71 72 #include <ctype.h> 73 #include <err.h> 74 #include <fcntl.h> 75 #include <kvm.h> 76 #include <limits.h> 77 #include <nlist.h> 78 #include <paths.h> 79 #include <pwd.h> 80 #include <stdio.h> 81 #include <stdlib.h> 82 #include <string.h> 83 #include <unistd.h> 84 #include <netdb.h> 85 86 #include "fstat.h" 87 88 #define TEXT -1 89 #define CDIR -2 90 #define RDIR -3 91 #define TRACE -4 92 #define MMAP -5 93 94 DEVS *devs; 95 96 static void make_printable(char *buf, int len); 97 98 #ifdef notdef 99 struct nlist nl[] = { 100 { "" }, 101 }; 102 #endif 103 104 int fsflg, /* show files on same filesystem as file(s) argument */ 105 pflg, /* show files open by a particular pid */ 106 uflg; /* show files open by a particular (effective) user */ 107 int checkfile; /* true if restricting to particular files or filesystems */ 108 int nflg; /* (numerical) display f.s. and rdev as dev_t */ 109 int vflg; /* display errors in locating kernel data objects etc... */ 110 int mflg; /* include memory-mapped files */ 111 int wflg_mnt = 16; 112 int wflg_cmd = 10; 113 int pid_width = 5; 114 int ino_width = 9; 115 116 const char *Uname; 117 char *Comm; 118 int Pid; 119 120 struct fdnode *ofiles; /* buffer of pointers to file structures */ 121 int maxfiles; 122 123 #define ALLOC_OFILES(d) \ 124 if ((d) > maxfiles) { \ 125 free(ofiles); \ 126 ofiles = malloc((d) * sizeof(struct fdnode)); \ 127 if (ofiles == NULL) { \ 128 err(1, NULL); \ 129 } \ 130 maxfiles = (d); \ 131 } 132 133 kvm_t *kd; 134 135 static void dofiles(struct kinfo_proc *, struct proc *); 136 static void dommap(struct proc *); 137 static void vtrans_reset(void); 138 static void vtrans(struct vnode *, struct nchandle *, int, int, off_t); 139 static int ufs_filestat(struct vnode *, struct filestat *); 140 static int nfs_filestat(struct vnode *, struct filestat *); 141 static int devfs_filestat(struct vnode *, struct filestat *); 142 static char *getmnton(struct mount *, struct namecache_list *, struct nchandle *); 143 static void pipetrans(struct pipe *, int, int); 144 static void socktrans(struct socket *, int); 145 static void getinetproto(int); 146 static int getfname(const char *); 147 static void usage(void) __dead2; 148 149 150 int 151 main(int argc, char **argv) 152 { 153 struct passwd *passwd; 154 struct kinfo_proc *p, *plast; 155 struct proc proc; 156 int arg, ch, what; 157 char *memf, *nlistf; 158 char buf[_POSIX2_LINE_MAX]; 159 int cnt; 160 161 arg = 0; 162 what = KERN_PROC_ALL; 163 nlistf = memf = NULL; 164 while ((ch = getopt(argc, argv, "fmnp:u:vwN:M:")) != -1) 165 switch((char)ch) { 166 case 'f': 167 fsflg = 1; 168 break; 169 case 'M': 170 memf = optarg; 171 break; 172 case 'N': 173 nlistf = optarg; 174 break; 175 case 'm': 176 mflg = 1; 177 break; 178 case 'n': 179 nflg = 1; 180 break; 181 case 'p': 182 if (pflg++) 183 usage(); 184 if (!isdigit(*optarg)) { 185 warnx("-p requires a process id"); 186 usage(); 187 } 188 what = KERN_PROC_PID; 189 arg = atoi(optarg); 190 break; 191 case 'u': 192 if (uflg++) 193 usage(); 194 if (!(passwd = getpwnam(optarg))) 195 errx(1, "%s: unknown uid", optarg); 196 what = KERN_PROC_UID; 197 arg = passwd->pw_uid; 198 break; 199 case 'v': 200 vflg = 1; 201 break; 202 case 'w': 203 wflg_mnt = 40; 204 wflg_cmd = 16; 205 break; 206 case '?': 207 default: 208 usage(); 209 } 210 211 if (*(argv += optind)) { 212 for (; *argv; ++argv) { 213 if (getfname(*argv)) 214 checkfile = 1; 215 } 216 if (!checkfile) /* file(s) specified, but none accessable */ 217 exit(1); 218 } 219 220 ALLOC_OFILES(256); /* reserve space for file pointers */ 221 222 if (fsflg && !checkfile) { 223 /* -f with no files means use wd */ 224 if (getfname(".") == 0) 225 exit(1); 226 checkfile = 1; 227 } 228 229 /* 230 * Discard setgid privileges if not the running kernel so that bad 231 * guys can't print interesting stuff from kernel memory. 232 */ 233 if (nlistf != NULL || memf != NULL) 234 setgid(getgid()); 235 236 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf)) == NULL) 237 errx(1, "%s", buf); 238 #ifdef notdef 239 if (kvm_nlist(kd, nl) != 0) 240 errx(1, "no namelist: %s", kvm_geterr(kd)); 241 #endif 242 if ((p = kvm_getprocs(kd, what, arg, &cnt)) == NULL) 243 errx(1, "%s", kvm_geterr(kd)); 244 if (nflg) 245 printf("USER %-*.*s %*.*s FD DEV %*.*s MODE SZ|DV R/W", 246 wflg_cmd, wflg_cmd, "CMD", 247 pid_width, pid_width, "PID", 248 ino_width, ino_width, "INUM"); 249 else 250 printf("USER %-*.*s %*.*s FD %-*.*s %*.*s MODE SZ|DV R/W", 251 wflg_cmd, wflg_cmd, "CMD", 252 pid_width, pid_width, "PID", 253 wflg_mnt, wflg_mnt, "PATH", 254 ino_width, ino_width, "INUM"); 255 if (checkfile && fsflg == 0) 256 printf(" NAME\n"); 257 else 258 putchar('\n'); 259 260 for (plast = &p[cnt]; p < plast; ++p) { 261 if (p->kp_stat == SZOMB) 262 continue; 263 if (!kread((void *)p->kp_paddr, &proc, sizeof(proc))) { 264 dprintf(stderr, "can't read proc at %p for pid %d\n", 265 (void *)p->kp_paddr, Pid); 266 continue; 267 } 268 dofiles(p, &proc); 269 if (mflg) 270 dommap(&proc); 271 } 272 exit(0); 273 } 274 275 #define PREFIX(i) \ 276 printf("%-8.8s %-*s %*d", Uname, wflg_cmd, Comm, pid_width, Pid); \ 277 switch(i) { \ 278 case TEXT: \ 279 printf(" text"); \ 280 break; \ 281 case CDIR: \ 282 printf(" wd"); \ 283 break; \ 284 case RDIR: \ 285 printf(" root"); \ 286 break; \ 287 case TRACE: \ 288 printf(" tr"); \ 289 break; \ 290 case MMAP: \ 291 printf(" mmap"); \ 292 break; \ 293 default: \ 294 printf(" %4d", i); \ 295 break; \ 296 } 297 298 /* 299 * print open files attributed to this process 300 */ 301 static void 302 dofiles(struct kinfo_proc *kp, struct proc *p) 303 { 304 int i; 305 struct file file; 306 struct filedesc filed; 307 struct ktrace_node ktrace_node; 308 309 Uname = user_from_uid(kp->kp_uid, 0); 310 Pid = kp->kp_pid; 311 Comm = kp->kp_comm; 312 make_printable(Comm, strlen(Comm)); 313 314 if (p->p_fd == NULL) 315 return; 316 if (!kread(p->p_fd, &filed, sizeof (filed))) { 317 dprintf(stderr, "can't read filedesc at %p for pid %d\n", 318 (void *)p->p_fd, Pid); 319 return; 320 } 321 322 vtrans_reset(); 323 324 /* 325 * root directory vnode, if one 326 */ 327 if (filed.fd_rdir) 328 vtrans(filed.fd_rdir, &filed.fd_nrdir, RDIR, FREAD, 0); 329 /* 330 * current working directory vnode 331 */ 332 vtrans(filed.fd_cdir, &filed.fd_ncdir, CDIR, FREAD, 0); 333 /* 334 * ktrace vnode, if one 335 */ 336 if (p->p_tracenode) { 337 if (kread(p->p_tracenode, &ktrace_node, sizeof (ktrace_node))) 338 vtrans(ktrace_node.kn_vp, NULL, TRACE, FREAD|FWRITE, 0); 339 } 340 /* 341 * text vnode, if one 342 */ 343 if (p->p_textvp) 344 vtrans(p->p_textvp, NULL, TEXT, FREAD, 0); 345 /* 346 * open files 347 */ 348 ALLOC_OFILES(filed.fd_lastfile+1); 349 if (!kread(filed.fd_files, ofiles, 350 (filed.fd_lastfile+1) * sizeof(struct fdnode))) { 351 dprintf(stderr, 352 "can't read file structures at %p for pid %d\n", 353 (void *)filed.fd_files, Pid); 354 return; 355 } 356 for (i = 0; i <= filed.fd_lastfile; i++) { 357 if (ofiles[i].fp == NULL) 358 continue; 359 if (!kread(ofiles[i].fp, &file, sizeof (struct file))) { 360 dprintf(stderr, "can't read file %d at %p for pid %d\n", 361 i, (void *)ofiles[i].fp, Pid); 362 continue; 363 } 364 if (file.f_type == DTYPE_VNODE) { 365 vtrans((struct vnode *)file.f_data, &file.f_nchandle, 366 i, file.f_flag, file.f_offset); 367 } else if (file.f_type == DTYPE_SOCKET) { 368 if (checkfile == 0) 369 socktrans((struct socket *)file.f_data, i); 370 } 371 #ifdef DTYPE_PIPE 372 else if (file.f_type == DTYPE_PIPE) { 373 if (checkfile == 0) 374 pipetrans((struct pipe *)file.f_data, i, 375 file.f_flag); 376 } 377 #endif 378 #ifdef DTYPE_FIFO 379 else if (file.f_type == DTYPE_FIFO) { 380 if (checkfile == 0) 381 vtrans((struct vnode *)file.f_data, 382 &file.f_nchandle, 383 i, file.f_flag, file.f_offset); 384 } 385 #endif 386 else { 387 dprintf(stderr, 388 "unknown file type %d for file %d of pid %d\n", 389 file.f_type, i, Pid); 390 } 391 } 392 } 393 394 static void 395 dommap(struct proc *p) 396 { 397 struct vmspace vmspace; 398 vm_map_t map; 399 struct vm_map_entry entry; 400 vm_map_entry_t ken; 401 struct vm_object object; 402 struct vm_map_backing ba; 403 vm_object_t objp; 404 int prot, fflags; 405 406 if (!kread(p->p_vmspace, &vmspace, sizeof(vmspace))) { 407 dprintf(stderr, "can't read vmspace at %p for pid %d\n", 408 (void *)p->p_vmspace, Pid); 409 return; 410 } 411 412 map = &vmspace.vm_map; 413 for (ken = kvm_vm_map_entry_first(kd, map, &entry); 414 ken; ken = kvm_vm_map_entry_next(kd, ken, &entry)) { 415 if (entry.maptype == VM_MAPTYPE_SUBMAP) 416 continue; 417 418 if (entry.ba.object == NULL) 419 continue; 420 ba = entry.ba; 421 for (;;) { 422 if ((objp = entry.ba.object) != NULL) { 423 if (!kread(objp, &object, sizeof(object))) { 424 dprintf(stderr, 425 "can't read vm_object at %p " 426 "for pid %d\n", 427 (void *)objp, Pid); 428 return; 429 } 430 } 431 if (ba.backing_ba == NULL) 432 break; 433 if (!kread(ba.backing_ba, &ba, sizeof(ba))) { 434 dprintf(stderr, 435 "can't read map_backing at %p " 436 "for pid %d\n", 437 (void *)ba.backing_ba, Pid); 438 return; 439 } 440 } 441 442 prot = entry.protection; 443 fflags = (prot & VM_PROT_READ ? FREAD : 0) | 444 (prot & VM_PROT_WRITE ? FWRITE : 0); 445 446 switch (object.type) { 447 case OBJT_VNODE: 448 vtrans((struct vnode *)object.handle, NULL, 449 MMAP, fflags, 0); 450 break; 451 default: 452 break; 453 } 454 } 455 } 456 457 static int last_name_width; 458 459 static void 460 vtrans_reset(void) 461 { 462 last_name_width = 0; 463 } 464 465 static void 466 vtrans(struct vnode *vp, struct nchandle *ncr, int i, int flag, off_t off) 467 { 468 struct vnode vn; 469 struct filestat fst; 470 char rw[3], mode[15]; 471 const char *badtype = NULL, *filename; 472 char *name; 473 int len; 474 int extra_space; 475 476 fst.offset = off; 477 filename = badtype = NULL; 478 if (!kread(vp, &vn, sizeof (struct vnode))) { 479 dprintf(stderr, "can't read vnode at %p for pid %d\n", 480 (void *)vp, Pid); 481 return; 482 } 483 if (vn.v_type == VNON || vn.v_tag == VT_NON) { 484 badtype = "none"; 485 } else if (vn.v_type == VBAD) { 486 badtype = "bad"; 487 } else { 488 switch (vn.v_tag) { 489 case VT_HAMMER: 490 if (!hammer_filestat(&vn, &fst)) 491 badtype = "error"; 492 break; 493 case VT_HAMMER2: 494 if (!hammer2_filestat(&vn, &fst)) 495 badtype = "error"; 496 break; 497 case VT_TMPFS: 498 if (!tmpfs_filestat(&vn, &fst)) 499 badtype = "error"; 500 break; 501 case VT_UFS: 502 if (!ufs_filestat(&vn, &fst)) 503 badtype = "error"; 504 break; 505 case VT_MFS: 506 if (!ufs_filestat(&vn, &fst)) 507 badtype = "error"; 508 break; 509 case VT_NFS: 510 if (!nfs_filestat(&vn, &fst)) 511 badtype = "error"; 512 break; 513 case VT_NTFS: 514 if (!ntfs_filestat(&vn, &fst)) 515 badtype = "error"; 516 break; 517 case VT_EXT2FS: 518 if (!ext2fs_filestat(&vn, &fst)) 519 badtype = "error"; 520 break; 521 522 case VT_MSDOSFS: 523 if (!msdosfs_filestat(&vn, &fst)) 524 badtype = "error"; 525 break; 526 527 case VT_ISOFS: 528 if (!isofs_filestat(&vn, &fst)) 529 badtype = "error"; 530 break; 531 532 case VT_DEVFS: 533 if (!devfs_filestat(&vn, &fst)) 534 badtype = "error"; 535 break; 536 537 default: 538 { 539 static char unknown[10]; 540 541 sprintf(unknown, "?(%x)", vn.v_tag); 542 badtype = unknown; 543 break; 544 } 545 } 546 } 547 if (checkfile) { 548 int fsmatch = 0; 549 DEVS *d; 550 551 if (badtype) 552 return; 553 for (d = devs; d != NULL; d = d->next) 554 if (d->fsid == fst.fsid) { 555 fsmatch = 1; 556 if (d->ino == (ino_t)fst.fileid) { 557 filename = d->name; 558 break; 559 } 560 } 561 if (fsmatch == 0 || (filename == NULL && fsflg == 0)) 562 return; 563 } 564 PREFIX(i); 565 566 /* 567 * Retrieve variable-length file path and try to make 568 * indentation human-readable. 569 */ 570 if (badtype) { 571 asprintf(&name, "%s", 572 getmnton(vn.v_mount, &vn.v_namecache, ncr)); 573 } else if (nflg) { 574 asprintf(&name, "%3u,%-9u", 575 major(fst.fsid), minor(fst.fsid)); 576 } else { 577 asprintf(&name, "%s", 578 getmnton(vn.v_mount, &vn.v_namecache, ncr)); 579 } 580 len = (int)strlen(name); 581 582 /* 583 * Nominal extra-space indented in multiples of 4 584 */ 585 extra_space = wflg_mnt - len; 586 if (extra_space < 0) 587 extra_space = 4 - -extra_space % 4; 588 589 if (len + extra_space < last_name_width) 590 extra_space = last_name_width - len; 591 last_name_width = len + extra_space; 592 593 printf(" %s%*.*s ", name, extra_space, extra_space, ""); 594 free(name); 595 name = NULL; 596 597 /* 598 * Remaining sections 599 */ 600 if (badtype) { 601 printf("%10s %8s:%jd\n", 602 badtype, "offset", (intmax_t)off); 603 return; 604 } 605 606 if (nflg) { 607 sprintf(mode, "%06o", fst.mode); 608 printf("%*ld %s", ino_width, fst.fileid, mode); 609 } else { 610 strmode(fst.mode, mode); 611 printf("%*ld %10s", ino_width, fst.fileid, mode); 612 } 613 614 switch (vn.v_type) { 615 case VBLK: 616 case VCHR: 617 if (nflg || 618 ((name = devname(fst.rdev, vn.v_type == VCHR ? 619 S_IFCHR : S_IFBLK)) == NULL)) { 620 printf(" %3u,%-4u", major(fst.rdev), minor(fst.rdev)); 621 } else { 622 printf(" %8s", name); 623 } 624 printf(":%jd", (intmax_t)fst.offset); 625 break; 626 case VREG: 627 printf(" %8s:%ju", "offset", (intmax_t)fst.offset); 628 break; 629 default: 630 printf(" %8s:%ju", "offset", (uintmax_t)fst.size); 631 } 632 rw[0] = '\0'; 633 if (flag & FREAD) 634 strcat(rw, "r"); 635 if (flag & FWRITE) 636 strcat(rw, "w"); 637 printf(" %2s", rw); 638 if (filename && !fsflg) 639 printf(" %s", filename); 640 putchar('\n'); 641 } 642 643 static int 644 ufs_filestat(struct vnode *vp, struct filestat *fsp) 645 { 646 struct inode inode; 647 648 if (!kread(VTOI(vp), &inode, sizeof (inode))) { 649 dprintf(stderr, "can't read inode at %p for pid %d\n", 650 (void *)VTOI(vp), Pid); 651 return 0; 652 } 653 /* 654 * The st_dev from stat(2) is a dev_t. These kernel structures 655 * contain cdev_t structures. We need to convert to udev to make 656 * comparisons 657 */ 658 fsp->fsid = fstat_dev2udev(inode.i_dev); 659 fsp->fileid = (long)inode.i_number; 660 fsp->mode = (mode_t)inode.i_mode; 661 fsp->size = inode.i_size; 662 fsp->rdev = inode.i_rdev; 663 664 return 1; 665 } 666 667 static int 668 nfs_filestat(struct vnode *vp, struct filestat *fsp) 669 { 670 struct nfsnode nfsnode; 671 672 if (!kread(VTONFS(vp), &nfsnode, sizeof (nfsnode))) { 673 dprintf(stderr, "can't read nfsnode at %p for pid %d\n", 674 (void *)VTONFS(vp), Pid); 675 return 0; 676 } 677 fsp->fsid = nfsnode.n_vattr.va_fsid; 678 fsp->fileid = nfsnode.n_vattr.va_fileid; 679 fsp->size = nfsnode.n_size; 680 fsp->rdev = makeudev(nfsnode.n_vattr.va_rmajor, 681 nfsnode.n_vattr.va_rminor); 682 fsp->mode = nfsnode.n_vattr.va_mode | mtrans(vp->v_type); 683 684 return 1; 685 } 686 687 static int 688 devfs_filestat(struct vnode *vp, struct filestat *fsp) 689 { 690 struct devfs_node devfs_node; 691 692 if (!kread(vp->v_data, &devfs_node, sizeof (devfs_node))) { 693 dprintf(stderr, "can't read devfs_node at %p for pid %d\n", 694 (void *)vp->v_data, Pid); 695 return 0; 696 } 697 fsp->fsid = fsp->rdev = fstat_dev2udev(vp->v_rdev); 698 fsp->fileid = devfs_node.d_dir.d_ino; 699 fsp->mode = (devfs_node.mode & ~S_IFMT) | S_IFCHR; 700 fsp->size = 0; 701 702 return 1; 703 } 704 705 static char * 706 getmnton(struct mount *m, struct namecache_list *ncplist, struct nchandle *ncr) 707 { 708 static struct mount mount_l; 709 static struct mtab { 710 struct mtab *next; 711 struct mount *m; 712 char mntonname[MNAMELEN]; 713 } *mhead = NULL; 714 struct mtab *mt; 715 struct namecache *ncp; 716 struct namecache ncp_copy; 717 static char path[1024]; 718 int i; 719 720 /* 721 * If no ncp is passed try to find one via ncplist. Make sure 722 * we are using the correct mount pointer or the matching code 723 * will not know how to transition mount points properly. 724 */ 725 if (ncr == NULL || ncr->ncp == NULL) { 726 ncp = ncplist->tqh_first; 727 } else { 728 ncp = ncr->ncp; 729 if (ncr->mount) 730 m = ncr->mount; 731 } 732 733 /* 734 * If we have an ncp, traceback the path. This is a kvm pointer. 735 */ 736 if (ncp) { 737 if (!kread(m, &mount_l, sizeof(struct mount))) { 738 warnx("can't read mount table at %p", (void *)m); 739 return (NULL); 740 } 741 i = sizeof(path) - 1; 742 path[i] = 0; 743 while (ncp) { 744 /* 745 * If this is the root of the mount then traverse 746 * to the parent mount. 747 */ 748 if (ncp == mount_l.mnt_ncmountpt.ncp) { 749 ncp = mount_l.mnt_ncmounton.ncp; 750 if (ncp == NULL) 751 break; 752 m = mount_l.mnt_ncmounton.mount; 753 if (!kread(m, &mount_l, sizeof(struct mount))) { 754 warnx("can't read mount table at %p", (void *)m); 755 return (NULL); 756 } 757 } 758 759 /* 760 * Ok, pull out the ncp and extract the name 761 */ 762 if (!kread(ncp, &ncp_copy, sizeof(ncp_copy))) { 763 warnx("can't read ncp at %p", ncp); 764 return (NULL); 765 } 766 if (i <= ncp_copy.nc_nlen) 767 break; 768 i -= ncp_copy.nc_nlen; 769 if (!kread(ncp_copy.nc_name, path + i, ncp_copy.nc_nlen)) { 770 warnx("can't read ncp %p path component at %p", ncp, ncp_copy.nc_name); 771 return (NULL); 772 } 773 make_printable(path + i, ncp_copy.nc_nlen); 774 path[--i] = '/'; 775 ncp = ncp_copy.nc_parent; 776 } 777 if (i == sizeof(path) - 1) 778 path[--i] = '/'; 779 return(path + i); 780 } 781 782 /* 783 * If all else fails print out the mount point path 784 */ 785 for (mt = mhead; mt != NULL; mt = mt->next) { 786 if (m == mt->m) 787 return (mt->mntonname); 788 } 789 if (!kread(m, &mount_l, sizeof(struct mount))) { 790 warnx("can't read mount table at %p", (void *)m); 791 return (NULL); 792 } 793 if ((mt = malloc(sizeof (struct mtab))) == NULL) 794 err(1, NULL); 795 mt->m = m; 796 bcopy(&mount_l.mnt_stat.f_mntonname[0], &mt->mntonname[0], MNAMELEN); 797 mt->next = mhead; 798 mhead = mt; 799 return (mt->mntonname); 800 } 801 802 static void 803 pipetrans(struct pipe *pi, int i, int flag) 804 { 805 struct pipe pip; 806 struct pipebuf *b1; 807 struct pipebuf *b2; 808 char rw[3]; 809 char side1; 810 char side2; 811 812 PREFIX(i); 813 if ((intptr_t)pi & 1) { 814 side1 = 'B'; 815 side2 = 'A'; 816 b1 = &pip.bufferB; 817 b2 = &pip.bufferA; 818 } else { 819 side1 = 'A'; 820 side2 = 'B'; 821 b1 = &pip.bufferA; 822 b2 = &pip.bufferB; 823 } 824 pi = (void *)((intptr_t)pi & ~(intptr_t)1); 825 826 /* fill in socket */ 827 if (!kread(pi, &pip, sizeof(struct pipe))) { 828 dprintf(stderr, "can't read pipe at %p\n", (void *)pi); 829 goto bad; 830 } 831 832 printf("* pipe %8lx (%c<->%c)", (u_long)pi, side1, side2); 833 printf(" ravail %-zu wavail %-zu", 834 b1->windex - b1->rindex, 835 b2->windex - b2->rindex); 836 rw[0] = '\0'; 837 if (flag & FREAD) 838 strcat(rw, "r"); 839 if (flag & FWRITE) 840 strcat(rw, "w"); 841 printf(" %2s", rw); 842 putchar('\n'); 843 return; 844 845 bad: 846 printf("* error\n"); 847 } 848 849 static void 850 socktrans(struct socket *sock, int i) 851 { 852 static const char *stypename[] = { 853 "unused", /* 0 */ 854 "stream", /* 1 */ 855 "dgram ", /* 2 */ 856 "raw ", /* 3 */ 857 "rdm ", /* 4 */ 858 "seqpak" /* 5 */ 859 }; 860 #define STYPEMAX 5 861 struct socket so; 862 struct protosw proto; 863 struct domain dom; 864 struct inpcb inpcb; 865 struct unpcb unpcb; 866 int len; 867 char dname[32]; 868 869 PREFIX(i); 870 871 /* fill in socket */ 872 if (!kread(sock, &so, sizeof(struct socket))) { 873 dprintf(stderr, "can't read sock at %p\n", (void *)sock); 874 goto bad; 875 } 876 877 /* fill in protosw entry */ 878 if (!kread(so.so_proto, &proto, sizeof(struct protosw))) { 879 dprintf(stderr, "can't read protosw at %p", 880 (void *)so.so_proto); 881 goto bad; 882 } 883 884 /* fill in domain */ 885 if (!kread(proto.pr_domain, &dom, sizeof(struct domain))) { 886 dprintf(stderr, "can't read domain at %p\n", 887 (const void *)proto.pr_domain); 888 goto bad; 889 } 890 891 if ((len = kvm_read(kd, (u_long)dom.dom_name, dname, 892 sizeof(dname) - 1)) < 0) { 893 dprintf(stderr, "can't read domain name at %p\n", 894 (void *)dom.dom_name); 895 dname[0] = '\0'; 896 } 897 else 898 dname[len] = '\0'; 899 900 if ((u_short)so.so_type > STYPEMAX) 901 printf("* %-9s ?%d", dname, so.so_type); 902 else 903 printf("* %-9s %s", dname, stypename[so.so_type]); 904 905 /* 906 * protocol specific formatting 907 * 908 * Try to find interesting things to print. For tcp, the interesting 909 * thing is the address of the tcpcb, for udp and others, just the 910 * inpcb (socket pcb). For unix domain, its the address of the socket 911 * pcb and the address of the connected pcb (if connected). Otherwise 912 * just print the protocol number and address of the socket itself. 913 * The idea is not to duplicate netstat, but to make available enough 914 * information for further analysis. 915 */ 916 switch(dom.dom_family) { 917 case AF_INET: 918 case AF_INET6: 919 getinetproto(proto.pr_protocol); 920 if (proto.pr_protocol == IPPROTO_TCP ) { 921 if (so.so_pcb) { 922 if (kvm_read(kd, (u_long)so.so_pcb, 923 (char *)&inpcb, sizeof(struct inpcb)) 924 != sizeof(struct inpcb)) { 925 dprintf(stderr, 926 "can't read inpcb at %p\n", 927 (void *)so.so_pcb); 928 goto bad; 929 } 930 printf(" %lx", (u_long)inpcb.inp_ppcb); 931 } 932 } 933 else if (so.so_pcb) 934 printf(" %lx", (u_long)so.so_pcb); 935 break; 936 case AF_UNIX: 937 /* print address of pcb and connected pcb */ 938 if (so.so_pcb) { 939 printf(" %lx", (u_long)so.so_pcb); 940 if (kvm_read(kd, (u_long)so.so_pcb, (char *)&unpcb, 941 sizeof(struct unpcb)) != sizeof(struct unpcb)){ 942 dprintf(stderr, "can't read unpcb at %p\n", 943 (void *)so.so_pcb); 944 goto bad; 945 } 946 if (unpcb.unp_conn) { 947 char shoconn[4], *cp; 948 949 cp = shoconn; 950 if (!(so.so_state & SS_CANTRCVMORE)) 951 *cp++ = '<'; 952 *cp++ = '-'; 953 if (!(so.so_state & SS_CANTSENDMORE)) 954 *cp++ = '>'; 955 *cp = '\0'; 956 printf(" %s %lx", shoconn, 957 (u_long)unpcb.unp_conn); 958 } 959 } 960 break; 961 default: 962 /* print protocol number and socket address */ 963 printf(" %d %lx", proto.pr_protocol, (u_long)sock); 964 } 965 printf("\n"); 966 return; 967 bad: 968 printf("* error\n"); 969 } 970 971 972 /* 973 * Read the cdev structure in the kernel (as pointed to by a cdev_t) 974 * in order to work out the associated dev_t 975 */ 976 dev_t 977 fstat_dev2udev(cdev_t dev) 978 { 979 struct cdev si; 980 981 if (kread(dev, &si, sizeof si)) { 982 if ((si.si_umajor & 0xffffff00) || 983 (si.si_uminor & 0x0000ff00)) { 984 return NOUDEV; 985 } 986 return((si.si_umajor << 8) | si.si_uminor); 987 } else { 988 dprintf(stderr, "can't convert cdev_t %p to a dev_t\n", dev); 989 return NOUDEV; 990 } 991 } 992 993 dev_t 994 makeudev(int x, int y) 995 { 996 if ((x & 0xffffff00) || (y & 0x0000ff00)) 997 return NOUDEV; 998 return ((x << 8) | y); 999 } 1000 1001 /* 1002 * getinetproto -- 1003 * print name of protocol number 1004 */ 1005 static void 1006 getinetproto(int number) 1007 { 1008 static int isopen; 1009 struct protoent *pe; 1010 1011 if (!isopen) 1012 setprotoent(++isopen); 1013 if ((pe = getprotobynumber(number)) != NULL) 1014 printf(" %s", pe->p_name); 1015 else 1016 printf(" %d", number); 1017 } 1018 1019 static int 1020 getfname(const char *filename) 1021 { 1022 struct stat statbuf; 1023 DEVS *cur; 1024 1025 if (stat(filename, &statbuf)) { 1026 warn("%s", filename); 1027 return(0); 1028 } 1029 if ((cur = malloc(sizeof(DEVS))) == NULL) 1030 err(1, NULL); 1031 cur->next = devs; 1032 devs = cur; 1033 1034 cur->ino = statbuf.st_ino; 1035 cur->fsid = statbuf.st_dev; 1036 cur->name = filename; 1037 return(1); 1038 } 1039 1040 static void 1041 usage(void) 1042 { 1043 (void)fprintf(stderr, 1044 "usage: fstat [-fmnv] [-p pid] [-u user] [-N system] [-M core] [file ...]\n"); 1045 exit(1); 1046 } 1047 1048 static 1049 void 1050 make_printable(char *buf, int len) 1051 { 1052 while (len > 0) { 1053 if (!isprint(*buf)) 1054 *buf = '?'; 1055 ++buf; 1056 --len; 1057 } 1058 } 1059 1060 ssize_t 1061 kread(const void *kaddr, void *uaddr, size_t nbytes) 1062 { 1063 if (nbytes > 0x10000000) 1064 return(0); 1065 1066 if (kvm_read(kd, (u_long)kaddr, (char *)uaddr, nbytes) == (ssize_t)nbytes) 1067 return(1); 1068 else 1069 return(0); 1070 } 1071