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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1988, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 /*static char sccsid[] = "from: @(#)fstat.c 8.3 (Berkeley) 5/2/95;*/ 42 static char *rcsid = "$Id: fstat.c,v 1.16 1996/05/05 19:12:03 mhitch Exp $"; 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/time.h> 47 #include <sys/proc.h> 48 #include <sys/user.h> 49 #include <sys/stat.h> 50 #include <sys/vnode.h> 51 #include <sys/socket.h> 52 #include <sys/socketvar.h> 53 #include <sys/domain.h> 54 #include <sys/protosw.h> 55 #include <sys/unpcb.h> 56 #include <sys/sysctl.h> 57 #include <sys/filedesc.h> 58 #define _KERNEL 59 #include <sys/file.h> 60 #include <ufs/ufs/quota.h> 61 #include <ufs/ufs/inode.h> 62 #undef _KERNEL 63 #define NFS 64 #include <sys/mount.h> 65 #include <nfs/nfsproto.h> 66 #include <nfs/rpcv2.h> 67 #include <nfs/nfs.h> 68 #include <nfs/nfsnode.h> 69 #undef NFS 70 71 #include <net/route.h> 72 #include <netinet/in.h> 73 #include <netinet/in_systm.h> 74 #include <netinet/ip.h> 75 #include <netinet/in_pcb.h> 76 77 #include <ctype.h> 78 #include <errno.h> 79 #include <kvm.h> 80 #include <limits.h> 81 #include <nlist.h> 82 #include <paths.h> 83 #include <pwd.h> 84 #include <stdio.h> 85 #include <stdlib.h> 86 #include <string.h> 87 88 #define TEXT -1 89 #define CDIR -2 90 #define RDIR -3 91 #define TRACE -4 92 93 typedef struct devs { 94 struct devs *next; 95 long fsid; 96 ino_t ino; 97 char *name; 98 } DEVS; 99 DEVS *devs; 100 101 struct filestat { 102 long fsid; 103 long fileid; 104 mode_t mode; 105 u_long size; 106 dev_t rdev; 107 }; 108 109 #ifdef notdef 110 struct nlist nl[] = { 111 { "" }, 112 }; 113 #endif 114 115 int fsflg, /* show files on same filesystem as file(s) argument */ 116 pflg, /* show files open by a particular pid */ 117 uflg; /* show files open by a particular (effective) user */ 118 int checkfile; /* true if restricting to particular files or filesystems */ 119 int nflg; /* (numerical) display f.s. and rdev as dev_t */ 120 int vflg; /* display errors in locating kernel data objects etc... */ 121 122 #define dprintf if (vflg) fprintf 123 124 struct file **ofiles; /* buffer of pointers to file structures */ 125 int maxfiles; 126 #define ALLOC_OFILES(d) \ 127 if ((d) > maxfiles) { \ 128 free(ofiles); \ 129 ofiles = malloc((d) * sizeof(struct file *)); \ 130 if (ofiles == NULL) { \ 131 fprintf(stderr, "fstat: %s\n", strerror(errno)); \ 132 exit(1); \ 133 } \ 134 maxfiles = (d); \ 135 } 136 137 /* 138 * a kvm_read that returns true if everything is read 139 */ 140 #define KVM_READ(kaddr, paddr, len) \ 141 (kvm_read(kd, (u_long)(kaddr), (char *)(paddr), (len)) == (len)) 142 143 kvm_t *kd; 144 145 int ufs_filestat(), nfs_filestat(); 146 void dofiles(), getinetproto(), socktrans(); 147 void usage(), vtrans(); 148 149 main(argc, argv) 150 int argc; 151 char **argv; 152 { 153 extern char *optarg; 154 extern int optind; 155 register struct passwd *passwd; 156 struct kinfo_proc *p, *plast; 157 int arg, ch, what; 158 char *memf, *nlistf; 159 char buf[_POSIX2_LINE_MAX]; 160 int cnt; 161 162 arg = 0; 163 what = KERN_PROC_ALL; 164 nlistf = memf = NULL; 165 while ((ch = getopt(argc, argv, "fnp:u:vN:M:")) != EOF) 166 switch((char)ch) { 167 case 'f': 168 fsflg = 1; 169 break; 170 case 'M': 171 memf = optarg; 172 break; 173 case 'N': 174 nlistf = optarg; 175 break; 176 case 'n': 177 nflg = 1; 178 break; 179 case 'p': 180 if (pflg++) 181 usage(); 182 if (!isdigit(*optarg)) { 183 fprintf(stderr, 184 "fstat: -p requires a process id\n"); 185 usage(); 186 } 187 what = KERN_PROC_PID; 188 arg = atoi(optarg); 189 break; 190 case 'u': 191 if (uflg++) 192 usage(); 193 if (!(passwd = getpwnam(optarg))) { 194 fprintf(stderr, "%s: unknown uid\n", 195 optarg); 196 exit(1); 197 } 198 what = KERN_PROC_UID; 199 arg = passwd->pw_uid; 200 break; 201 case 'v': 202 vflg = 1; 203 break; 204 case '?': 205 default: 206 usage(); 207 } 208 209 if (*(argv += optind)) { 210 for (; *argv; ++argv) { 211 if (getfname(*argv)) 212 checkfile = 1; 213 } 214 if (!checkfile) /* file(s) specified, but none accessable */ 215 exit(1); 216 } 217 218 ALLOC_OFILES(256); /* reserve space for file pointers */ 219 220 if (fsflg && !checkfile) { 221 /* -f with no files means use wd */ 222 if (getfname(".") == 0) 223 exit(1); 224 checkfile = 1; 225 } 226 227 /* 228 * Discard setgid privileges if not the running kernel so that bad 229 * guys can't print interesting stuff from kernel memory. 230 */ 231 if (nlistf != NULL || memf != NULL) 232 setgid(getgid()); 233 234 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf)) == NULL) { 235 fprintf(stderr, "fstat: %s\n", buf); 236 exit(1); 237 } 238 #ifdef notdef 239 if (kvm_nlist(kd, nl) != 0) { 240 fprintf(stderr, "fstat: no namelist: %s\n", kvm_geterr(kd)); 241 exit(1); 242 } 243 #endif 244 if ((p = kvm_getprocs(kd, what, arg, &cnt)) == NULL) { 245 fprintf(stderr, "fstat: %s\n", kvm_geterr(kd)); 246 exit(1); 247 } 248 if (nflg) 249 printf("%s", 250 "USER CMD PID FD DEV INUM MODE SZ|DV R/W"); 251 else 252 printf("%s", 253 "USER CMD PID FD MOUNT INUM MODE SZ|DV R/W"); 254 if (checkfile && fsflg == 0) 255 printf(" NAME\n"); 256 else 257 putchar('\n'); 258 259 for (plast = &p[cnt]; p < plast; ++p) { 260 if (p->kp_proc.p_stat == SZOMB) 261 continue; 262 dofiles(p); 263 } 264 exit(0); 265 } 266 267 char *Uname, *Comm; 268 int Pid; 269 270 #define PREFIX(i) printf("%-8.8s %-10s %5d", Uname, Comm, Pid); \ 271 switch(i) { \ 272 case TEXT: \ 273 printf(" text"); \ 274 break; \ 275 case CDIR: \ 276 printf(" wd"); \ 277 break; \ 278 case RDIR: \ 279 printf(" root"); \ 280 break; \ 281 case TRACE: \ 282 printf(" tr"); \ 283 break; \ 284 default: \ 285 printf(" %4d", i); \ 286 break; \ 287 } 288 289 /* 290 * print open files attributed to this process 291 */ 292 void 293 dofiles(kp) 294 struct kinfo_proc *kp; 295 { 296 int i, last; 297 struct file file; 298 struct filedesc0 filed0; 299 #define filed filed0.fd_fd 300 struct proc *p = &kp->kp_proc; 301 struct eproc *ep = &kp->kp_eproc; 302 303 extern char *user_from_uid(); 304 305 Uname = user_from_uid(ep->e_ucred.cr_uid, 0); 306 Pid = p->p_pid; 307 Comm = p->p_comm; 308 309 if (p->p_fd == NULL) 310 return; 311 if (!KVM_READ(p->p_fd, &filed0, sizeof (filed0))) { 312 dprintf(stderr, "can't read filedesc at %x for pid %d\n", 313 p->p_fd, Pid); 314 return; 315 } 316 if (filed.fd_nfiles < 0 || filed.fd_lastfile >= filed.fd_nfiles || 317 filed.fd_freefile > filed.fd_lastfile + 1) { 318 dprintf(stderr, "filedesc corrupted at %x for pid %d\n", 319 p->p_fd, Pid); 320 return; 321 } 322 /* 323 * root directory vnode, if one 324 */ 325 if (filed.fd_rdir) 326 vtrans(filed.fd_rdir, RDIR, FREAD); 327 /* 328 * current working directory vnode 329 */ 330 vtrans(filed.fd_cdir, CDIR, FREAD); 331 /* 332 * ktrace vnode, if one 333 */ 334 if (p->p_tracep) 335 vtrans(p->p_tracep, TRACE, FREAD|FWRITE); 336 /* 337 * open files 338 */ 339 #define FPSIZE (sizeof (struct file *)) 340 ALLOC_OFILES(filed.fd_lastfile+1); 341 if (filed.fd_nfiles > NDFILE) { 342 if (!KVM_READ(filed.fd_ofiles, ofiles, 343 (filed.fd_lastfile+1) * FPSIZE)) { 344 dprintf(stderr, 345 "can't read file structures at %x for pid %d\n", 346 filed.fd_ofiles, Pid); 347 return; 348 } 349 } else 350 bcopy(filed0.fd_dfiles, ofiles, (filed.fd_lastfile+1) * FPSIZE); 351 for (i = 0; i <= filed.fd_lastfile; i++) { 352 if (ofiles[i] == NULL) 353 continue; 354 if (!KVM_READ(ofiles[i], &file, sizeof (struct file))) { 355 dprintf(stderr, "can't read file %d at %x for pid %d\n", 356 i, ofiles[i], Pid); 357 continue; 358 } 359 if (file.f_type == DTYPE_VNODE) 360 vtrans((struct vnode *)file.f_data, i, file.f_flag); 361 else if (file.f_type == DTYPE_SOCKET) { 362 if (checkfile == 0) 363 socktrans((struct socket *)file.f_data, i); 364 } 365 else { 366 dprintf(stderr, 367 "unknown file type %d for file %d of pid %d\n", 368 file.f_type, i, Pid); 369 } 370 } 371 } 372 373 void 374 vtrans(vp, i, flag) 375 struct vnode *vp; 376 int i; 377 int flag; 378 { 379 struct vnode vn; 380 struct filestat fst; 381 char rw[3], mode[15]; 382 char *badtype = NULL, *filename, *getmnton(); 383 384 filename = badtype = NULL; 385 if (!KVM_READ(vp, &vn, sizeof (struct vnode))) { 386 dprintf(stderr, "can't read vnode at %x for pid %d\n", 387 vp, Pid); 388 return; 389 } 390 if (vn.v_type == VNON || vn.v_tag == VT_NON) 391 badtype = "none"; 392 else if (vn.v_type == VBAD) 393 badtype = "bad"; 394 else 395 switch (vn.v_tag) { 396 case VT_UFS: 397 if (!ufs_filestat(&vn, &fst)) 398 badtype = "error"; 399 break; 400 case VT_MFS: 401 if (!ufs_filestat(&vn, &fst)) 402 badtype = "error"; 403 break; 404 case VT_NFS: 405 if (!nfs_filestat(&vn, &fst)) 406 badtype = "error"; 407 break; 408 default: { 409 static char unknown[10]; 410 sprintf(badtype = unknown, "?(%x)", vn.v_tag); 411 break;; 412 } 413 } 414 if (checkfile) { 415 int fsmatch = 0; 416 register DEVS *d; 417 418 if (badtype) 419 return; 420 for (d = devs; d != NULL; d = d->next) 421 if (d->fsid == fst.fsid) { 422 fsmatch = 1; 423 if (d->ino == fst.fileid) { 424 filename = d->name; 425 break; 426 } 427 } 428 if (fsmatch == 0 || (filename == NULL && fsflg == 0)) 429 return; 430 } 431 PREFIX(i); 432 if (badtype) { 433 (void)printf(" - - %10s -\n", badtype); 434 return; 435 } 436 if (nflg) 437 (void)printf(" %2d,%-2d", major(fst.fsid), minor(fst.fsid)); 438 else 439 (void)printf(" %-8s", getmnton(vn.v_mount)); 440 if (nflg) 441 (void)sprintf(mode, "%o", fst.mode); 442 else 443 strmode(fst.mode, mode); 444 (void)printf(" %6d %10s", fst.fileid, mode); 445 switch (vn.v_type) { 446 case VBLK: 447 case VCHR: { 448 char *name; 449 450 if (nflg || ((name = devname(fst.rdev, vn.v_type == VCHR ? 451 S_IFCHR : S_IFBLK)) == NULL)) 452 printf(" %2d,%-2d", major(fst.rdev), minor(fst.rdev)); 453 else 454 printf(" %6s", name); 455 break; 456 } 457 default: 458 printf(" %6d", fst.size); 459 } 460 rw[0] = '\0'; 461 if (flag & FREAD) 462 strcat(rw, "r"); 463 if (flag & FWRITE) 464 strcat(rw, "w"); 465 printf(" %2s", rw); 466 if (filename && !fsflg) 467 printf(" %s", filename); 468 putchar('\n'); 469 } 470 471 int 472 ufs_filestat(vp, fsp) 473 struct vnode *vp; 474 struct filestat *fsp; 475 { 476 struct inode inode; 477 478 if (!KVM_READ(VTOI(vp), &inode, sizeof (inode))) { 479 dprintf(stderr, "can't read inode at %x for pid %d\n", 480 VTOI(vp), Pid); 481 return 0; 482 } 483 fsp->fsid = inode.i_dev & 0xffff; 484 fsp->fileid = (long)inode.i_number; 485 fsp->mode = (mode_t)inode.i_mode; 486 fsp->size = (u_long)inode.i_size; 487 fsp->rdev = inode.i_rdev; 488 489 return 1; 490 } 491 492 int 493 nfs_filestat(vp, fsp) 494 struct vnode *vp; 495 struct filestat *fsp; 496 { 497 struct nfsnode nfsnode; 498 register mode_t mode; 499 500 if (!KVM_READ(VTONFS(vp), &nfsnode, sizeof (nfsnode))) { 501 dprintf(stderr, "can't read nfsnode at %x for pid %d\n", 502 VTONFS(vp), Pid); 503 return 0; 504 } 505 fsp->fsid = nfsnode.n_vattr.va_fsid; 506 fsp->fileid = nfsnode.n_vattr.va_fileid; 507 fsp->size = nfsnode.n_size; 508 fsp->rdev = nfsnode.n_vattr.va_rdev; 509 mode = (mode_t)nfsnode.n_vattr.va_mode; 510 switch (vp->v_type) { 511 case VREG: 512 mode |= S_IFREG; 513 break; 514 case VDIR: 515 mode |= S_IFDIR; 516 break; 517 case VBLK: 518 mode |= S_IFBLK; 519 break; 520 case VCHR: 521 mode |= S_IFCHR; 522 break; 523 case VLNK: 524 mode |= S_IFLNK; 525 break; 526 case VSOCK: 527 mode |= S_IFSOCK; 528 break; 529 case VFIFO: 530 mode |= S_IFIFO; 531 break; 532 }; 533 fsp->mode = mode; 534 535 return 1; 536 } 537 538 539 char * 540 getmnton(m) 541 struct mount *m; 542 { 543 static struct mount mount; 544 static struct mtab { 545 struct mtab *next; 546 struct mount *m; 547 char mntonname[MNAMELEN]; 548 } *mhead = NULL; 549 register struct mtab *mt; 550 551 for (mt = mhead; mt != NULL; mt = mt->next) 552 if (m == mt->m) 553 return (mt->mntonname); 554 if (!KVM_READ(m, &mount, sizeof(struct mount))) { 555 fprintf(stderr, "can't read mount table at %x\n", m); 556 return (NULL); 557 } 558 if ((mt = malloc(sizeof (struct mtab))) == NULL) { 559 fprintf(stderr, "fstat: %s\n", strerror(errno)); 560 exit(1); 561 } 562 mt->m = m; 563 bcopy(&mount.mnt_stat.f_mntonname[0], &mt->mntonname[0], MNAMELEN); 564 mt->next = mhead; 565 mhead = mt; 566 return (mt->mntonname); 567 } 568 569 void 570 socktrans(sock, i) 571 struct socket *sock; 572 int i; 573 { 574 static char *stypename[] = { 575 "unused", /* 0 */ 576 "stream", /* 1 */ 577 "dgram", /* 2 */ 578 "raw", /* 3 */ 579 "rdm", /* 4 */ 580 "seqpak" /* 5 */ 581 }; 582 #define STYPEMAX 5 583 struct socket so; 584 struct protosw proto; 585 struct domain dom; 586 struct inpcb inpcb; 587 struct unpcb unpcb; 588 int len; 589 char dname[32], *strcpy(); 590 591 PREFIX(i); 592 593 /* fill in socket */ 594 if (!KVM_READ(sock, &so, sizeof(struct socket))) { 595 dprintf(stderr, "can't read sock at %x\n", sock); 596 goto bad; 597 } 598 599 /* fill in protosw entry */ 600 if (!KVM_READ(so.so_proto, &proto, sizeof(struct protosw))) { 601 dprintf(stderr, "can't read protosw at %x", so.so_proto); 602 goto bad; 603 } 604 605 /* fill in domain */ 606 if (!KVM_READ(proto.pr_domain, &dom, sizeof(struct domain))) { 607 dprintf(stderr, "can't read domain at %x\n", proto.pr_domain); 608 goto bad; 609 } 610 611 if ((len = kvm_read(kd, (u_long)dom.dom_name, dname, 612 sizeof(dname) - 1)) < 0) { 613 dprintf(stderr, "can't read domain name at %x\n", 614 dom.dom_name); 615 dname[0] = '\0'; 616 } 617 else 618 dname[len] = '\0'; 619 620 if ((u_short)so.so_type > STYPEMAX) 621 printf("* %s ?%d", dname, so.so_type); 622 else 623 printf("* %s %s", dname, stypename[so.so_type]); 624 625 /* 626 * protocol specific formatting 627 * 628 * Try to find interesting things to print. For tcp, the interesting 629 * thing is the address of the tcpcb, for udp and others, just the 630 * inpcb (socket pcb). For unix domain, its the address of the socket 631 * pcb and the address of the connected pcb (if connected). Otherwise 632 * just print the protocol number and address of the socket itself. 633 * The idea is not to duplicate netstat, but to make available enough 634 * information for further analysis. 635 */ 636 switch(dom.dom_family) { 637 case AF_INET: 638 getinetproto(proto.pr_protocol); 639 if (proto.pr_protocol == IPPROTO_TCP ) { 640 if (so.so_pcb) { 641 if (kvm_read(kd, (u_long)so.so_pcb, 642 (char *)&inpcb, sizeof(struct inpcb)) 643 != sizeof(struct inpcb)) { 644 dprintf(stderr, 645 "can't read inpcb at %x\n", 646 so.so_pcb); 647 goto bad; 648 } 649 printf(" %lx", (long)inpcb.inp_ppcb); 650 } 651 } 652 else if (so.so_pcb) 653 printf(" %lx", (long)so.so_pcb); 654 break; 655 case AF_UNIX: 656 /* print address of pcb and connected pcb */ 657 if (so.so_pcb) { 658 printf(" %lx", (long)so.so_pcb); 659 if (kvm_read(kd, (u_long)so.so_pcb, (char *)&unpcb, 660 sizeof(struct unpcb)) != sizeof(struct unpcb)){ 661 dprintf(stderr, "can't read unpcb at %x\n", 662 so.so_pcb); 663 goto bad; 664 } 665 if (unpcb.unp_conn) { 666 char shoconn[4], *cp; 667 668 cp = shoconn; 669 if (!(so.so_state & SS_CANTRCVMORE)) 670 *cp++ = '<'; 671 *cp++ = '-'; 672 if (!(so.so_state & SS_CANTSENDMORE)) 673 *cp++ = '>'; 674 *cp = '\0'; 675 printf(" %s %lx", shoconn, 676 (long)unpcb.unp_conn); 677 } 678 } 679 break; 680 default: 681 /* print protocol number and socket address */ 682 printf(" %d %lx", proto.pr_protocol, (long)sock); 683 } 684 printf("\n"); 685 return; 686 bad: 687 printf("* error\n"); 688 } 689 690 /* 691 * getinetproto -- 692 * print name of protocol number 693 */ 694 void 695 getinetproto(number) 696 int number; 697 { 698 char *cp; 699 700 switch(number) { 701 case IPPROTO_IP: 702 cp = "ip"; break; 703 case IPPROTO_ICMP: 704 cp ="icmp"; break; 705 case IPPROTO_GGP: 706 cp ="ggp"; break; 707 case IPPROTO_TCP: 708 cp ="tcp"; break; 709 case IPPROTO_EGP: 710 cp ="egp"; break; 711 case IPPROTO_PUP: 712 cp ="pup"; break; 713 case IPPROTO_UDP: 714 cp ="udp"; break; 715 case IPPROTO_IDP: 716 cp ="idp"; break; 717 case IPPROTO_RAW: 718 cp ="raw"; break; 719 default: 720 printf(" %d", number); 721 return; 722 } 723 printf(" %s", cp); 724 } 725 726 getfname(filename) 727 char *filename; 728 { 729 struct stat statbuf; 730 DEVS *cur; 731 732 if (stat(filename, &statbuf)) { 733 fprintf(stderr, "fstat: %s: %s\n", filename, strerror(errno)); 734 return(0); 735 } 736 if ((cur = malloc(sizeof(DEVS))) == NULL) { 737 fprintf(stderr, "fstat: %s\n", strerror(errno)); 738 exit(1); 739 } 740 cur->next = devs; 741 devs = cur; 742 743 cur->ino = statbuf.st_ino; 744 cur->fsid = statbuf.st_dev & 0xffff; 745 cur->name = filename; 746 return(1); 747 } 748 749 void 750 usage() 751 { 752 (void)fprintf(stderr, 753 "usage: fstat [-fnv] [-p pid] [-u user] [-N system] [-M core] [file ...]\n"); 754 exit(1); 755 } 756