fstat.c revision 1.1.1.2
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[] = "@(#)fstat.c 8.1 (Berkeley) 6/6/93"; 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/time.h> 46 #include <sys/proc.h> 47 #include <sys/user.h> 48 #include <sys/stat.h> 49 #include <sys/vnode.h> 50 #include <sys/socket.h> 51 #include <sys/socketvar.h> 52 #include <sys/domain.h> 53 #include <sys/protosw.h> 54 #include <sys/unpcb.h> 55 #include <sys/sysctl.h> 56 #include <sys/filedesc.h> 57 #define KERNEL 58 #include <sys/file.h> 59 #include <ufs/ufs/quota.h> 60 #include <ufs/ufs/inode.h> 61 #undef KERNEL 62 #define NFS 63 #include <sys/mount.h> 64 #include <nfs/nfsv2.h> 65 #include <nfs/rpcv2.h> 66 #include <nfs/nfs.h> 67 #include <nfs/nfsnode.h> 68 #undef NFS 69 70 #include <net/route.h> 71 #include <netinet/in.h> 72 #include <netinet/in_systm.h> 73 #include <netinet/ip.h> 74 #include <netinet/in_pcb.h> 75 76 #include <ctype.h> 77 #include <errno.h> 78 #include <kvm.h> 79 #include <nlist.h> 80 #include <paths.h> 81 #include <pwd.h> 82 #include <stdio.h> 83 #include <stdlib.h> 84 #include <string.h> 85 86 #define TEXT -1 87 #define CDIR -2 88 #define RDIR -3 89 #define TRACE -4 90 91 typedef struct devs { 92 struct devs *next; 93 long fsid; 94 ino_t ino; 95 char *name; 96 } DEVS; 97 DEVS *devs; 98 99 struct filestat { 100 long fsid; 101 long fileid; 102 mode_t mode; 103 u_long size; 104 dev_t rdev; 105 }; 106 107 #ifdef notdef 108 struct nlist nl[] = { 109 { "" }, 110 }; 111 #endif 112 113 int fsflg, /* show files on same filesystem as file(s) argument */ 114 pflg, /* show files open by a particular pid */ 115 uflg; /* show files open by a particular (effective) user */ 116 int checkfile; /* true if restricting to particular files or filesystems */ 117 int nflg; /* (numerical) display f.s. and rdev as dev_t */ 118 int vflg; /* display errors in locating kernel data objects etc... */ 119 120 #define dprintf if (vflg) fprintf 121 122 struct file **ofiles; /* buffer of pointers to file structures */ 123 int maxfiles; 124 #define ALLOC_OFILES(d) \ 125 if ((d) > maxfiles) { \ 126 free(ofiles); \ 127 ofiles = malloc((d) * sizeof(struct file *)); \ 128 if (ofiles == NULL) { \ 129 fprintf(stderr, "fstat: %s\n", strerror(errno)); \ 130 exit(1); \ 131 } \ 132 maxfiles = (d); \ 133 } 134 135 /* 136 * a kvm_read that returns true if everything is read 137 */ 138 #define KVM_READ(kaddr, paddr, len) \ 139 (kvm_read(kd, (u_long)(kaddr), (char *)(paddr), (len)) == (len)) 140 141 kvm_t *kd; 142 143 int ufs_filestat(), nfs_filestat(); 144 void dofiles(), getinetproto(), socktrans(); 145 void usage(), vtrans(); 146 147 main(argc, argv) 148 int argc; 149 char **argv; 150 { 151 extern char *optarg; 152 extern int optind; 153 register struct passwd *passwd; 154 struct kinfo_proc *p, *plast; 155 int arg, ch, what; 156 char *memf, *nlistf; 157 int cnt; 158 159 arg = 0; 160 what = KERN_PROC_ALL; 161 nlistf = memf = NULL; 162 while ((ch = getopt(argc, argv, "fnp:u:vNM")) != EOF) 163 switch((char)ch) { 164 case 'f': 165 fsflg = 1; 166 break; 167 case 'M': 168 memf = optarg; 169 break; 170 case 'N': 171 nlistf = optarg; 172 break; 173 case 'n': 174 nflg = 1; 175 break; 176 case 'p': 177 if (pflg++) 178 usage(); 179 if (!isdigit(*optarg)) { 180 fprintf(stderr, 181 "fstat: -p requires a process id\n"); 182 usage(); 183 } 184 what = KERN_PROC_PID; 185 arg = atoi(optarg); 186 break; 187 case 'u': 188 if (uflg++) 189 usage(); 190 if (!(passwd = getpwnam(optarg))) { 191 fprintf(stderr, "%s: unknown uid\n", 192 optarg); 193 exit(1); 194 } 195 what = KERN_PROC_UID; 196 arg = passwd->pw_uid; 197 break; 198 case 'v': 199 vflg = 1; 200 break; 201 case '?': 202 default: 203 usage(); 204 } 205 206 if (*(argv += optind)) { 207 for (; *argv; ++argv) { 208 if (getfname(*argv)) 209 checkfile = 1; 210 } 211 if (!checkfile) /* file(s) specified, but none accessable */ 212 exit(1); 213 } 214 215 ALLOC_OFILES(256); /* reserve space for file pointers */ 216 217 if (fsflg && !checkfile) { 218 /* -f with no files means use wd */ 219 if (getfname(".") == 0) 220 exit(1); 221 checkfile = 1; 222 } 223 224 /* 225 * Discard setgid privileges if not the running kernel so that bad 226 * guys can't print interesting stuff from kernel memory. 227 */ 228 if (nlistf != NULL || memf != NULL) 229 setgid(getgid()); 230 231 if ((kd = kvm_open(nlistf, memf, NULL, O_RDONLY, NULL)) == NULL) { 232 fprintf(stderr, "fstat: %s\n", kvm_geterr(kd)); 233 exit(1); 234 } 235 #ifdef notdef 236 if (kvm_nlist(kd, nl) != 0) { 237 fprintf(stderr, "fstat: no namelist: %s\n", kvm_geterr(kd)); 238 exit(1); 239 } 240 #endif 241 if ((p = kvm_getprocs(kd, what, arg, &cnt)) == NULL) { 242 fprintf(stderr, "fstat: %s\n", kvm_geterr(kd)); 243 exit(1); 244 } 245 if (nflg) 246 printf("%s", 247 "USER CMD PID FD DEV INUM MODE SZ|DV R/W"); 248 else 249 printf("%s", 250 "USER CMD PID FD MOUNT INUM MODE SZ|DV R/W"); 251 if (checkfile && fsflg == 0) 252 printf(" NAME\n"); 253 else 254 putchar('\n'); 255 256 for (plast = &p[cnt]; p < plast; ++p) { 257 if (p->kp_proc.p_stat == SZOMB) 258 continue; 259 dofiles(p); 260 } 261 exit(0); 262 } 263 264 char *Uname, *Comm; 265 int Pid; 266 267 #define PREFIX(i) printf("%-8.8s %-10s %5d", Uname, Comm, Pid); \ 268 switch(i) { \ 269 case TEXT: \ 270 printf(" text"); \ 271 break; \ 272 case CDIR: \ 273 printf(" wd"); \ 274 break; \ 275 case RDIR: \ 276 printf(" root"); \ 277 break; \ 278 case TRACE: \ 279 printf(" tr"); \ 280 break; \ 281 default: \ 282 printf(" %4d", i); \ 283 break; \ 284 } 285 286 /* 287 * print open files attributed to this process 288 */ 289 void 290 dofiles(kp) 291 struct kinfo_proc *kp; 292 { 293 int i, last; 294 struct file file; 295 struct filedesc0 filed0; 296 #define filed filed0.fd_fd 297 struct proc *p = &kp->kp_proc; 298 struct eproc *ep = &kp->kp_eproc; 299 300 extern char *user_from_uid(); 301 302 Uname = user_from_uid(ep->e_ucred.cr_uid, 0); 303 Pid = p->p_pid; 304 Comm = p->p_comm; 305 306 if (p->p_fd == NULL) 307 return; 308 if (!KVM_READ(p->p_fd, &filed0, sizeof (filed0))) { 309 dprintf(stderr, "can't read filedesc at %x for pid %d\n", 310 p->p_fd, Pid); 311 return; 312 } 313 /* 314 * root directory vnode, if one 315 */ 316 if (filed.fd_rdir) 317 vtrans(filed.fd_rdir, RDIR, FREAD); 318 /* 319 * current working directory vnode 320 */ 321 vtrans(filed.fd_cdir, CDIR, FREAD); 322 /* 323 * ktrace vnode, if one 324 */ 325 if (p->p_tracep) 326 vtrans(p->p_tracep, TRACE, FREAD|FWRITE); 327 /* 328 * open files 329 */ 330 #define FPSIZE (sizeof (struct file *)) 331 ALLOC_OFILES(filed.fd_lastfile+1); 332 if (filed.fd_nfiles > NDFILE) { 333 if (!KVM_READ(filed.fd_ofiles, ofiles, 334 (filed.fd_lastfile+1) * FPSIZE)) { 335 dprintf(stderr, 336 "can't read file structures at %x for pid %d\n", 337 filed.fd_ofiles, Pid); 338 return; 339 } 340 } else 341 bcopy(filed0.fd_dfiles, ofiles, (filed.fd_lastfile+1) * FPSIZE); 342 for (i = 0; i <= filed.fd_lastfile; i++) { 343 if (ofiles[i] == NULL) 344 continue; 345 if (!KVM_READ(ofiles[i], &file, sizeof (struct file))) { 346 dprintf(stderr, "can't read file %d at %x for pid %d\n", 347 i, ofiles[i], Pid); 348 continue; 349 } 350 if (file.f_type == DTYPE_VNODE) 351 vtrans((struct vnode *)file.f_data, i, file.f_flag); 352 else if (file.f_type == DTYPE_SOCKET) { 353 if (checkfile == 0) 354 socktrans((struct socket *)file.f_data, i); 355 } 356 else { 357 dprintf(stderr, 358 "unknown file type %d for file %d of pid %d\n", 359 file.f_type, i, Pid); 360 } 361 } 362 } 363 364 void 365 vtrans(vp, i, flag) 366 struct vnode *vp; 367 int i; 368 int flag; 369 { 370 struct vnode vn; 371 struct filestat fst; 372 char rw[3], mode[15]; 373 char *badtype = NULL, *filename, *getmnton(); 374 375 filename = badtype = NULL; 376 if (!KVM_READ(vp, &vn, sizeof (struct vnode))) { 377 dprintf(stderr, "can't read vnode at %x for pid %d\n", 378 vp, Pid); 379 return; 380 } 381 if (vn.v_type == VNON || vn.v_tag == VT_NON) 382 badtype = "none"; 383 else if (vn.v_type == VBAD) 384 badtype = "bad"; 385 else 386 switch (vn.v_tag) { 387 case VT_UFS: 388 if (!ufs_filestat(&vn, &fst)) 389 badtype = "error"; 390 break; 391 case VT_MFS: 392 if (!ufs_filestat(&vn, &fst)) 393 badtype = "error"; 394 break; 395 case VT_NFS: 396 if (!nfs_filestat(&vn, &fst)) 397 badtype = "error"; 398 break; 399 default: { 400 static char unknown[10]; 401 sprintf(badtype = unknown, "?(%x)", vn.v_tag); 402 break;; 403 } 404 } 405 if (checkfile) { 406 int fsmatch = 0; 407 register DEVS *d; 408 409 if (badtype) 410 return; 411 for (d = devs; d != NULL; d = d->next) 412 if (d->fsid == fst.fsid) { 413 fsmatch = 1; 414 if (d->ino == fst.fileid) { 415 filename = d->name; 416 break; 417 } 418 } 419 if (fsmatch == 0 || (filename == NULL && fsflg == 0)) 420 return; 421 } 422 PREFIX(i); 423 if (badtype) { 424 (void)printf(" - - %10s -\n", badtype); 425 return; 426 } 427 if (nflg) 428 (void)printf(" %2d,%-2d", major(fst.fsid), minor(fst.fsid)); 429 else 430 (void)printf(" %-8s", getmnton(vn.v_mount)); 431 if (nflg) 432 (void)sprintf(mode, "%o", fst.mode); 433 else 434 strmode(fst.mode, mode); 435 (void)printf(" %6d %10s", fst.fileid, mode); 436 switch (vn.v_type) { 437 case VBLK: 438 case VCHR: { 439 char *name; 440 441 if (nflg || ((name = devname(fst.rdev, vn.v_type == VCHR ? 442 S_IFCHR : S_IFBLK)) == NULL)) 443 printf(" %2d,%-2d", major(fst.rdev), minor(fst.rdev)); 444 else 445 printf(" %6s", name); 446 break; 447 } 448 default: 449 printf(" %6d", fst.size); 450 } 451 rw[0] = '\0'; 452 if (flag & FREAD) 453 strcat(rw, "r"); 454 if (flag & FWRITE) 455 strcat(rw, "w"); 456 printf(" %2s", rw); 457 if (filename && !fsflg) 458 printf(" %s", filename); 459 putchar('\n'); 460 } 461 462 int 463 ufs_filestat(vp, fsp) 464 struct vnode *vp; 465 struct filestat *fsp; 466 { 467 struct inode inode; 468 469 if (!KVM_READ(VTOI(vp), &inode, sizeof (inode))) { 470 dprintf(stderr, "can't read inode at %x for pid %d\n", 471 VTOI(vp), Pid); 472 return 0; 473 } 474 fsp->fsid = inode.i_dev & 0xffff; 475 fsp->fileid = (long)inode.i_number; 476 fsp->mode = (mode_t)inode.i_mode; 477 fsp->size = (u_long)inode.i_size; 478 fsp->rdev = inode.i_rdev; 479 480 return 1; 481 } 482 483 int 484 nfs_filestat(vp, fsp) 485 struct vnode *vp; 486 struct filestat *fsp; 487 { 488 struct nfsnode nfsnode; 489 register mode_t mode; 490 491 if (!KVM_READ(VTONFS(vp), &nfsnode, sizeof (nfsnode))) { 492 dprintf(stderr, "can't read nfsnode at %x for pid %d\n", 493 VTONFS(vp), Pid); 494 return 0; 495 } 496 fsp->fsid = nfsnode.n_vattr.va_fsid; 497 fsp->fileid = nfsnode.n_vattr.va_fileid; 498 fsp->size = nfsnode.n_size; 499 fsp->rdev = nfsnode.n_vattr.va_rdev; 500 mode = (mode_t)nfsnode.n_vattr.va_mode; 501 switch (vp->v_type) { 502 case VREG: 503 mode |= S_IFREG; 504 break; 505 case VDIR: 506 mode |= S_IFDIR; 507 break; 508 case VBLK: 509 mode |= S_IFBLK; 510 break; 511 case VCHR: 512 mode |= S_IFCHR; 513 break; 514 case VLNK: 515 mode |= S_IFLNK; 516 break; 517 case VSOCK: 518 mode |= S_IFSOCK; 519 break; 520 case VFIFO: 521 mode |= S_IFIFO; 522 break; 523 }; 524 fsp->mode = mode; 525 526 return 1; 527 } 528 529 530 char * 531 getmnton(m) 532 struct mount *m; 533 { 534 static struct mount mount; 535 static struct mtab { 536 struct mtab *next; 537 struct mount *m; 538 char mntonname[MNAMELEN]; 539 } *mhead = NULL; 540 register struct mtab *mt; 541 542 for (mt = mhead; mt != NULL; mt = mt->next) 543 if (m == mt->m) 544 return (mt->mntonname); 545 if (!KVM_READ(m, &mount, sizeof(struct mount))) { 546 fprintf(stderr, "can't read mount table at %x\n", m); 547 return (NULL); 548 } 549 if ((mt = malloc(sizeof (struct mtab))) == NULL) { 550 fprintf(stderr, "fstat: %s\n", strerror(errno)); 551 exit(1); 552 } 553 mt->m = m; 554 bcopy(&mount.mnt_stat.f_mntonname[0], &mt->mntonname[0], MNAMELEN); 555 mt->next = mhead; 556 mhead = mt; 557 return (mt->mntonname); 558 } 559 560 void 561 socktrans(sock, i) 562 struct socket *sock; 563 int i; 564 { 565 static char *stypename[] = { 566 "unused", /* 0 */ 567 "stream", /* 1 */ 568 "dgram", /* 2 */ 569 "raw", /* 3 */ 570 "rdm", /* 4 */ 571 "seqpak" /* 5 */ 572 }; 573 #define STYPEMAX 5 574 struct socket so; 575 struct protosw proto; 576 struct domain dom; 577 struct inpcb inpcb; 578 struct unpcb unpcb; 579 int len; 580 char dname[32], *strcpy(); 581 582 PREFIX(i); 583 584 /* fill in socket */ 585 if (!KVM_READ(sock, &so, sizeof(struct socket))) { 586 dprintf(stderr, "can't read sock at %x\n", sock); 587 goto bad; 588 } 589 590 /* fill in protosw entry */ 591 if (!KVM_READ(so.so_proto, &proto, sizeof(struct protosw))) { 592 dprintf(stderr, "can't read protosw at %x", so.so_proto); 593 goto bad; 594 } 595 596 /* fill in domain */ 597 if (!KVM_READ(proto.pr_domain, &dom, sizeof(struct domain))) { 598 dprintf(stderr, "can't read domain at %x\n", proto.pr_domain); 599 goto bad; 600 } 601 602 if ((len = kvm_read(kd, (u_long)dom.dom_name, dname, 603 sizeof(dname) - 1)) < 0) { 604 dprintf(stderr, "can't read domain name at %x\n", 605 dom.dom_name); 606 dname[0] = '\0'; 607 } 608 else 609 dname[len] = '\0'; 610 611 if ((u_short)so.so_type > STYPEMAX) 612 printf("* %s ?%d", dname, so.so_type); 613 else 614 printf("* %s %s", dname, stypename[so.so_type]); 615 616 /* 617 * protocol specific formatting 618 * 619 * Try to find interesting things to print. For tcp, the interesting 620 * thing is the address of the tcpcb, for udp and others, just the 621 * inpcb (socket pcb). For unix domain, its the address of the socket 622 * pcb and the address of the connected pcb (if connected). Otherwise 623 * just print the protocol number and address of the socket itself. 624 * The idea is not to duplicate netstat, but to make available enough 625 * information for further analysis. 626 */ 627 switch(dom.dom_family) { 628 case AF_INET: 629 getinetproto(proto.pr_protocol); 630 if (proto.pr_protocol == IPPROTO_TCP ) { 631 if (so.so_pcb) { 632 if (kvm_read(kd, (u_long)so.so_pcb, 633 (char *)&inpcb, sizeof(struct inpcb)) 634 != sizeof(struct inpcb)) { 635 dprintf(stderr, 636 "can't read inpcb at %x\n", 637 so.so_pcb); 638 goto bad; 639 } 640 printf(" %x", (int)inpcb.inp_ppcb); 641 } 642 } 643 else if (so.so_pcb) 644 printf(" %x", (int)so.so_pcb); 645 break; 646 case AF_UNIX: 647 /* print address of pcb and connected pcb */ 648 if (so.so_pcb) { 649 printf(" %x", (int)so.so_pcb); 650 if (kvm_read(kd, (u_long)so.so_pcb, (char *)&unpcb, 651 sizeof(struct unpcb)) != sizeof(struct unpcb)){ 652 dprintf(stderr, "can't read unpcb at %x\n", 653 so.so_pcb); 654 goto bad; 655 } 656 if (unpcb.unp_conn) { 657 char shoconn[4], *cp; 658 659 cp = shoconn; 660 if (!(so.so_state & SS_CANTRCVMORE)) 661 *cp++ = '<'; 662 *cp++ = '-'; 663 if (!(so.so_state & SS_CANTSENDMORE)) 664 *cp++ = '>'; 665 *cp = '\0'; 666 printf(" %s %x", shoconn, 667 (int)unpcb.unp_conn); 668 } 669 } 670 break; 671 default: 672 /* print protocol number and socket address */ 673 printf(" %d %x", proto.pr_protocol, (int)sock); 674 } 675 printf("\n"); 676 return; 677 bad: 678 printf("* error\n"); 679 } 680 681 /* 682 * getinetproto -- 683 * print name of protocol number 684 */ 685 void 686 getinetproto(number) 687 int number; 688 { 689 char *cp; 690 691 switch(number) { 692 case IPPROTO_IP: 693 cp = "ip"; break; 694 case IPPROTO_ICMP: 695 cp ="icmp"; break; 696 case IPPROTO_GGP: 697 cp ="ggp"; break; 698 case IPPROTO_TCP: 699 cp ="tcp"; break; 700 case IPPROTO_EGP: 701 cp ="egp"; break; 702 case IPPROTO_PUP: 703 cp ="pup"; break; 704 case IPPROTO_UDP: 705 cp ="udp"; break; 706 case IPPROTO_IDP: 707 cp ="idp"; break; 708 case IPPROTO_RAW: 709 cp ="raw"; break; 710 default: 711 printf(" %d", number); 712 return; 713 } 714 printf(" %s", cp); 715 } 716 717 getfname(filename) 718 char *filename; 719 { 720 struct stat statbuf; 721 DEVS *cur; 722 723 if (stat(filename, &statbuf)) { 724 fprintf(stderr, "fstat: %s: %s\n", filename, strerror(errno)); 725 return(0); 726 } 727 if ((cur = malloc(sizeof(DEVS))) == NULL) { 728 fprintf(stderr, "fstat: %s\n", strerror(errno)); 729 exit(1); 730 } 731 cur->next = devs; 732 devs = cur; 733 734 cur->ino = statbuf.st_ino; 735 cur->fsid = statbuf.st_dev & 0xffff; 736 cur->name = filename; 737 return(1); 738 } 739 740 void 741 usage() 742 { 743 (void)fprintf(stderr, 744 "usage: fstat [-fnv] [-p pid] [-u user] [-N system] [-M core] [file ...]\n"); 745 exit(1); 746 } 747
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