usr.bin/fstat/fstat.c

   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 }