fstat.c revision 1.14
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 8.1 (Berkeley) 6/6/93";*/ 42 static char *rcsid = "$Id: fstat.c,v 1.14 1995/03/28 17:24:12 jtc 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/nfsv2.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 <nlist.h> 81 #include <paths.h> 82 #include <pwd.h> 83 #include <stdio.h> 84 #include <stdlib.h> 85 #include <string.h> 86 87 #define TEXT -1 88 #define CDIR -2 89 #define RDIR -3 90 #define TRACE -4 91 92 typedef struct devs { 93 struct devs *next; 94 long fsid; 95 ino_t ino; 96 char *name; 97 } DEVS; 98 DEVS *devs; 99 100 struct filestat { 101 long fsid; 102 long fileid; 103 mode_t mode; 104 u_long size; 105 dev_t rdev; 106 }; 107 108 #ifdef notdef 109 struct nlist nl[] = { 110 { "" }, 111 }; 112 #endif 113 114 int fsflg, /* show files on same filesystem as file(s) argument */ 115 pflg, /* show files open by a particular pid */ 116 uflg; /* show files open by a particular (effective) user */ 117 int checkfile; /* true if restricting to particular files or filesystems */ 118 int nflg; /* (numerical) display f.s. and rdev as dev_t */ 119 int vflg; /* display errors in locating kernel data objects etc... */ 120 121 #define dprintf if (vflg) fprintf 122 123 struct file **ofiles; /* buffer of pointers to file structures */ 124 int maxfiles; 125 #define ALLOC_OFILES(d) \ 126 if ((d) > maxfiles) { \ 127 free(ofiles); \ 128 ofiles = malloc((d) * sizeof(struct file *)); \ 129 if (ofiles == NULL) { \ 130 fprintf(stderr, "fstat: %s\n", strerror(errno)); \ 131 exit(1); \ 132 } \ 133 maxfiles = (d); \ 134 } 135 136 /* 137 * a kvm_read that returns true if everything is read 138 */ 139 #define KVM_READ(kaddr, paddr, len) \ 140 (kvm_read(kd, (u_long)(kaddr), (char *)(paddr), (len)) == (len)) 141 142 kvm_t *kd; 143 144 int ufs_filestat(), nfs_filestat(); 145 void dofiles(), getinetproto(), socktrans(); 146 void usage(), vtrans(); 147 148 main(argc, argv) 149 int argc; 150 char **argv; 151 { 152 extern char *optarg; 153 extern int optind; 154 register struct passwd *passwd; 155 struct kinfo_proc *p, *plast; 156 int arg, ch, what; 157 char *memf, *nlistf; 158 int cnt; 159 160 arg = 0; 161 what = KERN_PROC_ALL; 162 nlistf = memf = NULL; 163 while ((ch = getopt(argc, argv, "fnp:u:vNM")) != EOF) 164 switch((char)ch) { 165 case 'f': 166 fsflg = 1; 167 break; 168 case 'M': 169 memf = optarg; 170 break; 171 case 'N': 172 nlistf = optarg; 173 break; 174 case 'n': 175 nflg = 1; 176 break; 177 case 'p': 178 if (pflg++) 179 usage(); 180 if (!isdigit(*optarg)) { 181 fprintf(stderr, 182 "fstat: -p requires a process id\n"); 183 usage(); 184 } 185 what = KERN_PROC_PID; 186 arg = atoi(optarg); 187 break; 188 case 'u': 189 if (uflg++) 190 usage(); 191 if (!(passwd = getpwnam(optarg))) { 192 fprintf(stderr, "%s: unknown uid\n", 193 optarg); 194 exit(1); 195 } 196 what = KERN_PROC_UID; 197 arg = passwd->pw_uid; 198 break; 199 case 'v': 200 vflg = 1; 201 break; 202 case '?': 203 default: 204 usage(); 205 } 206 207 if (*(argv += optind)) { 208 for (; *argv; ++argv) { 209 if (getfname(*argv)) 210 checkfile = 1; 211 } 212 if (!checkfile) /* file(s) specified, but none accessable */ 213 exit(1); 214 } 215 216 ALLOC_OFILES(256); /* reserve space for file pointers */ 217 218 if (fsflg && !checkfile) { 219 /* -f with no files means use wd */ 220 if (getfname(".") == 0) 221 exit(1); 222 checkfile = 1; 223 } 224 225 /* 226 * Discard setgid privileges if not the running kernel so that bad 227 * guys can't print interesting stuff from kernel memory. 228 */ 229 if (nlistf != NULL || memf != NULL) 230 setgid(getgid()); 231 232 if ((kd = kvm_open(nlistf, memf, NULL, O_RDONLY, NULL)) == NULL) { 233 fprintf(stderr, "fstat: %s\n", kvm_geterr(kd)); 234 exit(1); 235 } 236 #ifdef notdef 237 if (kvm_nlist(kd, nl) != 0) { 238 fprintf(stderr, "fstat: no namelist: %s\n", kvm_geterr(kd)); 239 exit(1); 240 } 241 #endif 242 if ((p = kvm_getprocs(kd, what, arg, &cnt)) == NULL) { 243 fprintf(stderr, "fstat: %s\n", kvm_geterr(kd)); 244 exit(1); 245 } 246 if (nflg) 247 printf("%s", 248 "USER CMD PID FD DEV INUM MODE SZ|DV R/W"); 249 else 250 printf("%s", 251 "USER CMD PID FD MOUNT INUM MODE SZ|DV R/W"); 252 if (checkfile && fsflg == 0) 253 printf(" NAME\n"); 254 else 255 putchar('\n'); 256 257 for (plast = &p[cnt]; p < plast; ++p) { 258 if (p->kp_proc.p_stat == SZOMB) 259 continue; 260 dofiles(p); 261 } 262 exit(0); 263 } 264 265 char *Uname, *Comm; 266 int Pid; 267 268 #define PREFIX(i) printf("%-8.8s %-10s %5d", Uname, Comm, Pid); \ 269 switch(i) { \ 270 case TEXT: \ 271 printf(" text"); \ 272 break; \ 273 case CDIR: \ 274 printf(" wd"); \ 275 break; \ 276 case RDIR: \ 277 printf(" root"); \ 278 break; \ 279 case TRACE: \ 280 printf(" tr"); \ 281 break; \ 282 default: \ 283 printf(" %4d", i); \ 284 break; \ 285 } 286 287 /* 288 * print open files attributed to this process 289 */ 290 void 291 dofiles(kp) 292 struct kinfo_proc *kp; 293 { 294 int i, last; 295 struct file file; 296 struct filedesc0 filed0; 297 #define filed filed0.fd_fd 298 struct proc *p = &kp->kp_proc; 299 struct eproc *ep = &kp->kp_eproc; 300 301 extern char *user_from_uid(); 302 303 Uname = user_from_uid(ep->e_ucred.cr_uid, 0); 304 Pid = p->p_pid; 305 Comm = p->p_comm; 306 307 if (p->p_fd == NULL) 308 return; 309 if (!KVM_READ(p->p_fd, &filed0, sizeof (filed0))) { 310 dprintf(stderr, "can't read filedesc at %x for pid %d\n", 311 p->p_fd, Pid); 312 return; 313 } 314 if (filed.fd_nfiles < 0 || filed.fd_lastfile >= filed.fd_nfiles || 315 filed.fd_freefile > filed.fd_lastfile + 1) { 316 dprintf(stderr, "filedesc corrupted at %x for pid %d\n", 317 p->p_fd, Pid); 318 return; 319 } 320 /* 321 * root directory vnode, if one 322 */ 323 if (filed.fd_rdir) 324 vtrans(filed.fd_rdir, RDIR, FREAD); 325 /* 326 * current working directory vnode 327 */ 328 vtrans(filed.fd_cdir, CDIR, FREAD); 329 /* 330 * ktrace vnode, if one 331 */ 332 if (p->p_tracep) 333 vtrans(p->p_tracep, TRACE, FREAD|FWRITE); 334 /* 335 * open files 336 */ 337 #define FPSIZE (sizeof (struct file *)) 338 ALLOC_OFILES(filed.fd_lastfile+1); 339 if (filed.fd_nfiles > NDFILE) { 340 if (!KVM_READ(filed.fd_ofiles, ofiles, 341 (filed.fd_lastfile+1) * FPSIZE)) { 342 dprintf(stderr, 343 "can't read file structures at %x for pid %d\n", 344 filed.fd_ofiles, Pid); 345 return; 346 } 347 } else 348 bcopy(filed0.fd_dfiles, ofiles, (filed.fd_lastfile+1) * FPSIZE); 349 for (i = 0; i <= filed.fd_lastfile; i++) { 350 if (ofiles[i] == NULL) 351 continue; 352 if (!KVM_READ(ofiles[i], &file, sizeof (struct file))) { 353 dprintf(stderr, "can't read file %d at %x for pid %d\n", 354 i, ofiles[i], Pid); 355 continue; 356 } 357 if (file.f_type == DTYPE_VNODE) 358 vtrans((struct vnode *)file.f_data, i, file.f_flag); 359 else if (file.f_type == DTYPE_SOCKET) { 360 if (checkfile == 0) 361 socktrans((struct socket *)file.f_data, i); 362 } 363 else { 364 dprintf(stderr, 365 "unknown file type %d for file %d of pid %d\n", 366 file.f_type, i, Pid); 367 } 368 } 369 } 370 371 void 372 vtrans(vp, i, flag) 373 struct vnode *vp; 374 int i; 375 int flag; 376 { 377 struct vnode vn; 378 struct filestat fst; 379 char rw[3], mode[15]; 380 char *badtype = NULL, *filename, *getmnton(); 381 382 filename = badtype = NULL; 383 if (!KVM_READ(vp, &vn, sizeof (struct vnode))) { 384 dprintf(stderr, "can't read vnode at %x for pid %d\n", 385 vp, Pid); 386 return; 387 } 388 if (vn.v_type == VNON || vn.v_tag == VT_NON) 389 badtype = "none"; 390 else if (vn.v_type == VBAD) 391 badtype = "bad"; 392 else 393 switch (vn.v_tag) { 394 case VT_UFS: 395 if (!ufs_filestat(&vn, &fst)) 396 badtype = "error"; 397 break; 398 case VT_MFS: 399 if (!ufs_filestat(&vn, &fst)) 400 badtype = "error"; 401 break; 402 case VT_NFS: 403 if (!nfs_filestat(&vn, &fst)) 404 badtype = "error"; 405 break; 406 default: { 407 static char unknown[10]; 408 sprintf(badtype = unknown, "?(%x)", vn.v_tag); 409 break;; 410 } 411 } 412 if (checkfile) { 413 int fsmatch = 0; 414 register DEVS *d; 415 416 if (badtype) 417 return; 418 for (d = devs; d != NULL; d = d->next) 419 if (d->fsid == fst.fsid) { 420 fsmatch = 1; 421 if (d->ino == fst.fileid) { 422 filename = d->name; 423 break; 424 } 425 } 426 if (fsmatch == 0 || (filename == NULL && fsflg == 0)) 427 return; 428 } 429 PREFIX(i); 430 if (badtype) { 431 (void)printf(" - - %10s -\n", badtype); 432 return; 433 } 434 if (nflg) 435 (void)printf(" %2d,%-2d", major(fst.fsid), minor(fst.fsid)); 436 else 437 (void)printf(" %-8s", getmnton(vn.v_mount)); 438 if (nflg) 439 (void)sprintf(mode, "%o", fst.mode); 440 else 441 strmode(fst.mode, mode); 442 (void)printf(" %6d %10s", fst.fileid, mode); 443 switch (vn.v_type) { 444 case VBLK: 445 case VCHR: { 446 char *name; 447 448 if (nflg || ((name = devname(fst.rdev, vn.v_type == VCHR ? 449 S_IFCHR : S_IFBLK)) == NULL)) 450 printf(" %2d,%-2d", major(fst.rdev), minor(fst.rdev)); 451 else 452 printf(" %6s", name); 453 break; 454 } 455 default: 456 printf(" %6d", fst.size); 457 } 458 rw[0] = '\0'; 459 if (flag & FREAD) 460 strcat(rw, "r"); 461 if (flag & FWRITE) 462 strcat(rw, "w"); 463 printf(" %2s", rw); 464 if (filename && !fsflg) 465 printf(" %s", filename); 466 putchar('\n'); 467 } 468 469 int 470 ufs_filestat(vp, fsp) 471 struct vnode *vp; 472 struct filestat *fsp; 473 { 474 struct inode inode; 475 476 if (!KVM_READ(VTOI(vp), &inode, sizeof (inode))) { 477 dprintf(stderr, "can't read inode at %x for pid %d\n", 478 VTOI(vp), Pid); 479 return 0; 480 } 481 fsp->fsid = inode.i_dev & 0xffff; 482 fsp->fileid = (long)inode.i_number; 483 fsp->mode = (mode_t)inode.i_mode; 484 fsp->size = (u_long)inode.i_size; 485 fsp->rdev = inode.i_rdev; 486 487 return 1; 488 } 489 490 int 491 nfs_filestat(vp, fsp) 492 struct vnode *vp; 493 struct filestat *fsp; 494 { 495 struct nfsnode nfsnode; 496 register mode_t mode; 497 498 if (!KVM_READ(VTONFS(vp), &nfsnode, sizeof (nfsnode))) { 499 dprintf(stderr, "can't read nfsnode at %x for pid %d\n", 500 VTONFS(vp), Pid); 501 return 0; 502 } 503 fsp->fsid = nfsnode.n_vattr.va_fsid; 504 fsp->fileid = nfsnode.n_vattr.va_fileid; 505 fsp->size = nfsnode.n_size; 506 fsp->rdev = nfsnode.n_vattr.va_rdev; 507 mode = (mode_t)nfsnode.n_vattr.va_mode; 508 switch (vp->v_type) { 509 case VREG: 510 mode |= S_IFREG; 511 break; 512 case VDIR: 513 mode |= S_IFDIR; 514 break; 515 case VBLK: 516 mode |= S_IFBLK; 517 break; 518 case VCHR: 519 mode |= S_IFCHR; 520 break; 521 case VLNK: 522 mode |= S_IFLNK; 523 break; 524 case VSOCK: 525 mode |= S_IFSOCK; 526 break; 527 case VFIFO: 528 mode |= S_IFIFO; 529 break; 530 }; 531 fsp->mode = mode; 532 533 return 1; 534 } 535 536 537 char * 538 getmnton(m) 539 struct mount *m; 540 { 541 static struct mount mount; 542 static struct mtab { 543 struct mtab *next; 544 struct mount *m; 545 char mntonname[MNAMELEN]; 546 } *mhead = NULL; 547 register struct mtab *mt; 548 549 for (mt = mhead; mt != NULL; mt = mt->next) 550 if (m == mt->m) 551 return (mt->mntonname); 552 if (!KVM_READ(m, &mount, sizeof(struct mount))) { 553 fprintf(stderr, "can't read mount table at %x\n", m); 554 return (NULL); 555 } 556 if ((mt = malloc(sizeof (struct mtab))) == NULL) { 557 fprintf(stderr, "fstat: %s\n", strerror(errno)); 558 exit(1); 559 } 560 mt->m = m; 561 bcopy(&mount.mnt_stat.f_mntonname[0], &mt->mntonname[0], MNAMELEN); 562 mt->next = mhead; 563 mhead = mt; 564 return (mt->mntonname); 565 } 566 567 void 568 socktrans(sock, i) 569 struct socket *sock; 570 int i; 571 { 572 static char *stypename[] = { 573 "unused", /* 0 */ 574 "stream", /* 1 */ 575 "dgram", /* 2 */ 576 "raw", /* 3 */ 577 "rdm", /* 4 */ 578 "seqpak" /* 5 */ 579 }; 580 #define STYPEMAX 5 581 struct socket so; 582 struct protosw proto; 583 struct domain dom; 584 struct inpcb inpcb; 585 struct unpcb unpcb; 586 int len; 587 char dname[32], *strcpy(); 588 589 PREFIX(i); 590 591 /* fill in socket */ 592 if (!KVM_READ(sock, &so, sizeof(struct socket))) { 593 dprintf(stderr, "can't read sock at %x\n", sock); 594 goto bad; 595 } 596 597 /* fill in protosw entry */ 598 if (!KVM_READ(so.so_proto, &proto, sizeof(struct protosw))) { 599 dprintf(stderr, "can't read protosw at %x", so.so_proto); 600 goto bad; 601 } 602 603 /* fill in domain */ 604 if (!KVM_READ(proto.pr_domain, &dom, sizeof(struct domain))) { 605 dprintf(stderr, "can't read domain at %x\n", proto.pr_domain); 606 goto bad; 607 } 608 609 if ((len = kvm_read(kd, (u_long)dom.dom_name, dname, 610 sizeof(dname) - 1)) < 0) { 611 dprintf(stderr, "can't read domain name at %x\n", 612 dom.dom_name); 613 dname[0] = '\0'; 614 } 615 else 616 dname[len] = '\0'; 617 618 if ((u_short)so.so_type > STYPEMAX) 619 printf("* %s ?%d", dname, so.so_type); 620 else 621 printf("* %s %s", dname, stypename[so.so_type]); 622 623 /* 624 * protocol specific formatting 625 * 626 * Try to find interesting things to print. For tcp, the interesting 627 * thing is the address of the tcpcb, for udp and others, just the 628 * inpcb (socket pcb). For unix domain, its the address of the socket 629 * pcb and the address of the connected pcb (if connected). Otherwise 630 * just print the protocol number and address of the socket itself. 631 * The idea is not to duplicate netstat, but to make available enough 632 * information for further analysis. 633 */ 634 switch(dom.dom_family) { 635 case AF_INET: 636 getinetproto(proto.pr_protocol); 637 if (proto.pr_protocol == IPPROTO_TCP ) { 638 if (so.so_pcb) { 639 if (kvm_read(kd, (u_long)so.so_pcb, 640 (char *)&inpcb, sizeof(struct inpcb)) 641 != sizeof(struct inpcb)) { 642 dprintf(stderr, 643 "can't read inpcb at %x\n", 644 so.so_pcb); 645 goto bad; 646 } 647 printf(" %lx", (long)inpcb.inp_ppcb); 648 } 649 } 650 else if (so.so_pcb) 651 printf(" %lx", (long)so.so_pcb); 652 break; 653 case AF_UNIX: 654 /* print address of pcb and connected pcb */ 655 if (so.so_pcb) { 656 printf(" %lx", (long)so.so_pcb); 657 if (kvm_read(kd, (u_long)so.so_pcb, (char *)&unpcb, 658 sizeof(struct unpcb)) != sizeof(struct unpcb)){ 659 dprintf(stderr, "can't read unpcb at %x\n", 660 so.so_pcb); 661 goto bad; 662 } 663 if (unpcb.unp_conn) { 664 char shoconn[4], *cp; 665 666 cp = shoconn; 667 if (!(so.so_state & SS_CANTRCVMORE)) 668 *cp++ = '<'; 669 *cp++ = '-'; 670 if (!(so.so_state & SS_CANTSENDMORE)) 671 *cp++ = '>'; 672 *cp = '\0'; 673 printf(" %s %lx", shoconn, 674 (long)unpcb.unp_conn); 675 } 676 } 677 break; 678 default: 679 /* print protocol number and socket address */ 680 printf(" %d %lx", proto.pr_protocol, (long)sock); 681 } 682 printf("\n"); 683 return; 684 bad: 685 printf("* error\n"); 686 } 687 688 /* 689 * getinetproto -- 690 * print name of protocol number 691 */ 692 void 693 getinetproto(number) 694 int number; 695 { 696 char *cp; 697 698 switch(number) { 699 case IPPROTO_IP: 700 cp = "ip"; break; 701 case IPPROTO_ICMP: 702 cp ="icmp"; break; 703 case IPPROTO_GGP: 704 cp ="ggp"; break; 705 case IPPROTO_TCP: 706 cp ="tcp"; break; 707 case IPPROTO_EGP: 708 cp ="egp"; break; 709 case IPPROTO_PUP: 710 cp ="pup"; break; 711 case IPPROTO_UDP: 712 cp ="udp"; break; 713 case IPPROTO_IDP: 714 cp ="idp"; break; 715 case IPPROTO_RAW: 716 cp ="raw"; break; 717 default: 718 printf(" %d", number); 719 return; 720 } 721 printf(" %s", cp); 722 } 723 724 getfname(filename) 725 char *filename; 726 { 727 struct stat statbuf; 728 DEVS *cur; 729 730 if (stat(filename, &statbuf)) { 731 fprintf(stderr, "fstat: %s: %s\n", filename, strerror(errno)); 732 return(0); 733 } 734 if ((cur = malloc(sizeof(DEVS))) == NULL) { 735 fprintf(stderr, "fstat: %s\n", strerror(errno)); 736 exit(1); 737 } 738 cur->next = devs; 739 devs = cur; 740 741 cur->ino = statbuf.st_ino; 742 cur->fsid = statbuf.st_dev & 0xffff; 743 cur->name = filename; 744 return(1); 745 } 746 747 void 748 usage() 749 { 750 (void)fprintf(stderr, 751 "usage: fstat [-fnv] [-p pid] [-u user] [-N system] [-M core] [file ...]\n"); 752 exit(1); 753 } 754
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