1 /*- 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char copyright[] = 10 "@(#) Copyright (c) 1988, 1993\n\ 11 The Regents of the University of California. All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)fstat.c 8.2 (Berkeley) 04/28/95"; 16 #endif /* not lint */ 17 18 #include <sys/param.h> 19 #include <sys/time.h> 20 #include <sys/proc.h> 21 #include <sys/user.h> 22 #include <sys/stat.h> 23 #include <sys/vnode.h> 24 #include <sys/socket.h> 25 #include <sys/socketvar.h> 26 #include <sys/domain.h> 27 #include <sys/protosw.h> 28 #include <sys/unpcb.h> 29 #include <sys/sysctl.h> 30 #include <sys/filedesc.h> 31 #define KERNEL 32 #include <sys/file.h> 33 #include <ufs/ufs/quota.h> 34 #include <ufs/ufs/inode.h> 35 #undef KERNEL 36 #define NFS 37 #include <sys/mount.h> 38 #include <nfs/nfsv2.h> 39 #include <nfs/rpcv2.h> 40 #include <nfs/nfs.h> 41 #include <nfs/nfsnode.h> 42 #undef NFS 43 44 #include <net/route.h> 45 #include <netinet/in.h> 46 #include <netinet/in_systm.h> 47 #include <netinet/ip.h> 48 #include <netinet/in_pcb.h> 49 50 #include <ctype.h> 51 #include <errno.h> 52 #include <kvm.h> 53 #include <limits.h> 54 #include <nlist.h> 55 #include <paths.h> 56 #include <pwd.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 61 #define TEXT -1 62 #define CDIR -2 63 #define RDIR -3 64 #define TRACE -4 65 66 typedef struct devs { 67 struct devs *next; 68 long fsid; 69 ino_t ino; 70 char *name; 71 } DEVS; 72 DEVS *devs; 73 74 struct filestat { 75 long fsid; 76 long fileid; 77 mode_t mode; 78 u_long size; 79 dev_t rdev; 80 }; 81 82 #ifdef notdef 83 struct nlist nl[] = { 84 { "" }, 85 }; 86 #endif 87 88 int fsflg, /* show files on same filesystem as file(s) argument */ 89 pflg, /* show files open by a particular pid */ 90 uflg; /* show files open by a particular (effective) user */ 91 int checkfile; /* true if restricting to particular files or filesystems */ 92 int nflg; /* (numerical) display f.s. and rdev as dev_t */ 93 int vflg; /* display errors in locating kernel data objects etc... */ 94 95 #define dprintf if (vflg) fprintf 96 97 struct file **ofiles; /* buffer of pointers to file structures */ 98 int maxfiles; 99 #define ALLOC_OFILES(d) \ 100 if ((d) > maxfiles) { \ 101 free(ofiles); \ 102 ofiles = malloc((d) * sizeof(struct file *)); \ 103 if (ofiles == NULL) { \ 104 fprintf(stderr, "fstat: %s\n", strerror(errno)); \ 105 exit(1); \ 106 } \ 107 maxfiles = (d); \ 108 } 109 110 /* 111 * a kvm_read that returns true if everything is read 112 */ 113 #define KVM_READ(kaddr, paddr, len) \ 114 (kvm_read(kd, (u_long)(kaddr), (char *)(paddr), (len)) == (len)) 115 116 kvm_t *kd; 117 118 int ufs_filestat(), nfs_filestat(); 119 void dofiles(), getinetproto(), socktrans(); 120 void usage(), vtrans(); 121 122 main(argc, argv) 123 int argc; 124 char **argv; 125 { 126 extern char *optarg; 127 extern int optind; 128 register struct passwd *passwd; 129 struct kinfo_proc *p, *plast; 130 int arg, ch, what; 131 char *memf, *nlistf; 132 char buf[_POSIX2_LINE_MAX]; 133 int cnt; 134 135 arg = 0; 136 what = KERN_PROC_ALL; 137 nlistf = memf = NULL; 138 while ((ch = getopt(argc, argv, "fnp:u:vNM")) != EOF) 139 switch((char)ch) { 140 case 'f': 141 fsflg = 1; 142 break; 143 case 'M': 144 memf = optarg; 145 break; 146 case 'N': 147 nlistf = optarg; 148 break; 149 case 'n': 150 nflg = 1; 151 break; 152 case 'p': 153 if (pflg++) 154 usage(); 155 if (!isdigit(*optarg)) { 156 fprintf(stderr, 157 "fstat: -p requires a process id\n"); 158 usage(); 159 } 160 what = KERN_PROC_PID; 161 arg = atoi(optarg); 162 break; 163 case 'u': 164 if (uflg++) 165 usage(); 166 if (!(passwd = getpwnam(optarg))) { 167 fprintf(stderr, "%s: unknown uid\n", 168 optarg); 169 exit(1); 170 } 171 what = KERN_PROC_UID; 172 arg = passwd->pw_uid; 173 break; 174 case 'v': 175 vflg = 1; 176 break; 177 case '?': 178 default: 179 usage(); 180 } 181 182 if (*(argv += optind)) { 183 for (; *argv; ++argv) { 184 if (getfname(*argv)) 185 checkfile = 1; 186 } 187 if (!checkfile) /* file(s) specified, but none accessable */ 188 exit(1); 189 } 190 191 ALLOC_OFILES(256); /* reserve space for file pointers */ 192 193 if (fsflg && !checkfile) { 194 /* -f with no files means use wd */ 195 if (getfname(".") == 0) 196 exit(1); 197 checkfile = 1; 198 } 199 200 /* 201 * Discard setgid privileges if not the running kernel so that bad 202 * guys can't print interesting stuff from kernel memory. 203 */ 204 if (nlistf != NULL || memf != NULL) 205 setgid(getgid()); 206 207 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf)) == NULL) { 208 fprintf(stderr, "fstat: %s\n", buf); 209 exit(1); 210 } 211 #ifdef notdef 212 if (kvm_nlist(kd, nl) != 0) { 213 fprintf(stderr, "fstat: no namelist: %s\n", kvm_geterr(kd)); 214 exit(1); 215 } 216 #endif 217 if ((p = kvm_getprocs(kd, what, arg, &cnt)) == NULL) { 218 fprintf(stderr, "fstat: %s\n", kvm_geterr(kd)); 219 exit(1); 220 } 221 if (nflg) 222 printf("%s", 223 "USER CMD PID FD DEV INUM MODE SZ|DV R/W"); 224 else 225 printf("%s", 226 "USER CMD PID FD MOUNT INUM MODE SZ|DV R/W"); 227 if (checkfile && fsflg == 0) 228 printf(" NAME\n"); 229 else 230 putchar('\n'); 231 232 for (plast = &p[cnt]; p < plast; ++p) { 233 if (p->kp_proc.p_stat == SZOMB) 234 continue; 235 dofiles(p); 236 } 237 exit(0); 238 } 239 240 char *Uname, *Comm; 241 int Pid; 242 243 #define PREFIX(i) printf("%-8.8s %-10s %5d", Uname, Comm, Pid); \ 244 switch(i) { \ 245 case TEXT: \ 246 printf(" text"); \ 247 break; \ 248 case CDIR: \ 249 printf(" wd"); \ 250 break; \ 251 case RDIR: \ 252 printf(" root"); \ 253 break; \ 254 case TRACE: \ 255 printf(" tr"); \ 256 break; \ 257 default: \ 258 printf(" %4d", i); \ 259 break; \ 260 } 261 262 /* 263 * print open files attributed to this process 264 */ 265 void 266 dofiles(kp) 267 struct kinfo_proc *kp; 268 { 269 int i, last; 270 struct file file; 271 struct filedesc0 filed0; 272 #define filed filed0.fd_fd 273 struct proc *p = &kp->kp_proc; 274 struct eproc *ep = &kp->kp_eproc; 275 276 extern char *user_from_uid(); 277 278 Uname = user_from_uid(ep->e_ucred.cr_uid, 0); 279 Pid = p->p_pid; 280 Comm = p->p_comm; 281 282 if (p->p_fd == NULL) 283 return; 284 if (!KVM_READ(p->p_fd, &filed0, sizeof (filed0))) { 285 dprintf(stderr, "can't read filedesc at %x for pid %d\n", 286 p->p_fd, Pid); 287 return; 288 } 289 /* 290 * root directory vnode, if one 291 */ 292 if (filed.fd_rdir) 293 vtrans(filed.fd_rdir, RDIR, FREAD); 294 /* 295 * current working directory vnode 296 */ 297 vtrans(filed.fd_cdir, CDIR, FREAD); 298 /* 299 * ktrace vnode, if one 300 */ 301 if (p->p_tracep) 302 vtrans(p->p_tracep, TRACE, FREAD|FWRITE); 303 /* 304 * open files 305 */ 306 #define FPSIZE (sizeof (struct file *)) 307 ALLOC_OFILES(filed.fd_lastfile+1); 308 if (filed.fd_nfiles > NDFILE) { 309 if (!KVM_READ(filed.fd_ofiles, ofiles, 310 (filed.fd_lastfile+1) * FPSIZE)) { 311 dprintf(stderr, 312 "can't read file structures at %x for pid %d\n", 313 filed.fd_ofiles, Pid); 314 return; 315 } 316 } else 317 bcopy(filed0.fd_dfiles, ofiles, (filed.fd_lastfile+1) * FPSIZE); 318 for (i = 0; i <= filed.fd_lastfile; i++) { 319 if (ofiles[i] == NULL) 320 continue; 321 if (!KVM_READ(ofiles[i], &file, sizeof (struct file))) { 322 dprintf(stderr, "can't read file %d at %x for pid %d\n", 323 i, ofiles[i], Pid); 324 continue; 325 } 326 if (file.f_type == DTYPE_VNODE) 327 vtrans((struct vnode *)file.f_data, i, file.f_flag); 328 else if (file.f_type == DTYPE_SOCKET) { 329 if (checkfile == 0) 330 socktrans((struct socket *)file.f_data, i); 331 } 332 else { 333 dprintf(stderr, 334 "unknown file type %d for file %d of pid %d\n", 335 file.f_type, i, Pid); 336 } 337 } 338 } 339 340 void 341 vtrans(vp, i, flag) 342 struct vnode *vp; 343 int i; 344 int flag; 345 { 346 struct vnode vn; 347 struct filestat fst; 348 char rw[3], mode[15]; 349 char *badtype = NULL, *filename, *getmnton(); 350 351 filename = badtype = NULL; 352 if (!KVM_READ(vp, &vn, sizeof (struct vnode))) { 353 dprintf(stderr, "can't read vnode at %x for pid %d\n", 354 vp, Pid); 355 return; 356 } 357 if (vn.v_type == VNON || vn.v_tag == VT_NON) 358 badtype = "none"; 359 else if (vn.v_type == VBAD) 360 badtype = "bad"; 361 else 362 switch (vn.v_tag) { 363 case VT_UFS: 364 if (!ufs_filestat(&vn, &fst)) 365 badtype = "error"; 366 break; 367 case VT_MFS: 368 if (!ufs_filestat(&vn, &fst)) 369 badtype = "error"; 370 break; 371 case VT_NFS: 372 if (!nfs_filestat(&vn, &fst)) 373 badtype = "error"; 374 break; 375 default: { 376 static char unknown[10]; 377 sprintf(badtype = unknown, "?(%x)", vn.v_tag); 378 break;; 379 } 380 } 381 if (checkfile) { 382 int fsmatch = 0; 383 register DEVS *d; 384 385 if (badtype) 386 return; 387 for (d = devs; d != NULL; d = d->next) 388 if (d->fsid == fst.fsid) { 389 fsmatch = 1; 390 if (d->ino == fst.fileid) { 391 filename = d->name; 392 break; 393 } 394 } 395 if (fsmatch == 0 || (filename == NULL && fsflg == 0)) 396 return; 397 } 398 PREFIX(i); 399 if (badtype) { 400 (void)printf(" - - %10s -\n", badtype); 401 return; 402 } 403 if (nflg) 404 (void)printf(" %2d,%-2d", major(fst.fsid), minor(fst.fsid)); 405 else 406 (void)printf(" %-8s", getmnton(vn.v_mount)); 407 if (nflg) 408 (void)sprintf(mode, "%o", fst.mode); 409 else 410 strmode(fst.mode, mode); 411 (void)printf(" %6d %10s", fst.fileid, mode); 412 switch (vn.v_type) { 413 case VBLK: 414 case VCHR: { 415 char *name; 416 417 if (nflg || ((name = devname(fst.rdev, vn.v_type == VCHR ? 418 S_IFCHR : S_IFBLK)) == NULL)) 419 printf(" %2d,%-2d", major(fst.rdev), minor(fst.rdev)); 420 else 421 printf(" %6s", name); 422 break; 423 } 424 default: 425 printf(" %6d", fst.size); 426 } 427 rw[0] = '\0'; 428 if (flag & FREAD) 429 strcat(rw, "r"); 430 if (flag & FWRITE) 431 strcat(rw, "w"); 432 printf(" %2s", rw); 433 if (filename && !fsflg) 434 printf(" %s", filename); 435 putchar('\n'); 436 } 437 438 int 439 ufs_filestat(vp, fsp) 440 struct vnode *vp; 441 struct filestat *fsp; 442 { 443 struct inode inode; 444 445 if (!KVM_READ(VTOI(vp), &inode, sizeof (inode))) { 446 dprintf(stderr, "can't read inode at %x for pid %d\n", 447 VTOI(vp), Pid); 448 return 0; 449 } 450 fsp->fsid = inode.i_dev & 0xffff; 451 fsp->fileid = (long)inode.i_number; 452 fsp->mode = (mode_t)inode.i_mode; 453 fsp->size = (u_long)inode.i_size; 454 fsp->rdev = inode.i_rdev; 455 456 return 1; 457 } 458 459 int 460 nfs_filestat(vp, fsp) 461 struct vnode *vp; 462 struct filestat *fsp; 463 { 464 struct nfsnode nfsnode; 465 register mode_t mode; 466 467 if (!KVM_READ(VTONFS(vp), &nfsnode, sizeof (nfsnode))) { 468 dprintf(stderr, "can't read nfsnode at %x for pid %d\n", 469 VTONFS(vp), Pid); 470 return 0; 471 } 472 fsp->fsid = nfsnode.n_vattr.va_fsid; 473 fsp->fileid = nfsnode.n_vattr.va_fileid; 474 fsp->size = nfsnode.n_size; 475 fsp->rdev = nfsnode.n_vattr.va_rdev; 476 mode = (mode_t)nfsnode.n_vattr.va_mode; 477 switch (vp->v_type) { 478 case VREG: 479 mode |= S_IFREG; 480 break; 481 case VDIR: 482 mode |= S_IFDIR; 483 break; 484 case VBLK: 485 mode |= S_IFBLK; 486 break; 487 case VCHR: 488 mode |= S_IFCHR; 489 break; 490 case VLNK: 491 mode |= S_IFLNK; 492 break; 493 case VSOCK: 494 mode |= S_IFSOCK; 495 break; 496 case VFIFO: 497 mode |= S_IFIFO; 498 break; 499 }; 500 fsp->mode = mode; 501 502 return 1; 503 } 504 505 506 char * 507 getmnton(m) 508 struct mount *m; 509 { 510 static struct mount mount; 511 static struct mtab { 512 struct mtab *next; 513 struct mount *m; 514 char mntonname[MNAMELEN]; 515 } *mhead = NULL; 516 register struct mtab *mt; 517 518 for (mt = mhead; mt != NULL; mt = mt->next) 519 if (m == mt->m) 520 return (mt->mntonname); 521 if (!KVM_READ(m, &mount, sizeof(struct mount))) { 522 fprintf(stderr, "can't read mount table at %x\n", m); 523 return (NULL); 524 } 525 if ((mt = malloc(sizeof (struct mtab))) == NULL) { 526 fprintf(stderr, "fstat: %s\n", strerror(errno)); 527 exit(1); 528 } 529 mt->m = m; 530 bcopy(&mount.mnt_stat.f_mntonname[0], &mt->mntonname[0], MNAMELEN); 531 mt->next = mhead; 532 mhead = mt; 533 return (mt->mntonname); 534 } 535 536 void 537 socktrans(sock, i) 538 struct socket *sock; 539 int i; 540 { 541 static char *stypename[] = { 542 "unused", /* 0 */ 543 "stream", /* 1 */ 544 "dgram", /* 2 */ 545 "raw", /* 3 */ 546 "rdm", /* 4 */ 547 "seqpak" /* 5 */ 548 }; 549 #define STYPEMAX 5 550 struct socket so; 551 struct protosw proto; 552 struct domain dom; 553 struct inpcb inpcb; 554 struct unpcb unpcb; 555 int len; 556 char dname[32], *strcpy(); 557 558 PREFIX(i); 559 560 /* fill in socket */ 561 if (!KVM_READ(sock, &so, sizeof(struct socket))) { 562 dprintf(stderr, "can't read sock at %x\n", sock); 563 goto bad; 564 } 565 566 /* fill in protosw entry */ 567 if (!KVM_READ(so.so_proto, &proto, sizeof(struct protosw))) { 568 dprintf(stderr, "can't read protosw at %x", so.so_proto); 569 goto bad; 570 } 571 572 /* fill in domain */ 573 if (!KVM_READ(proto.pr_domain, &dom, sizeof(struct domain))) { 574 dprintf(stderr, "can't read domain at %x\n", proto.pr_domain); 575 goto bad; 576 } 577 578 if ((len = kvm_read(kd, (u_long)dom.dom_name, dname, 579 sizeof(dname) - 1)) < 0) { 580 dprintf(stderr, "can't read domain name at %x\n", 581 dom.dom_name); 582 dname[0] = '\0'; 583 } 584 else 585 dname[len] = '\0'; 586 587 if ((u_short)so.so_type > STYPEMAX) 588 printf("* %s ?%d", dname, so.so_type); 589 else 590 printf("* %s %s", dname, stypename[so.so_type]); 591 592 /* 593 * protocol specific formatting 594 * 595 * Try to find interesting things to print. For tcp, the interesting 596 * thing is the address of the tcpcb, for udp and others, just the 597 * inpcb (socket pcb). For unix domain, its the address of the socket 598 * pcb and the address of the connected pcb (if connected). Otherwise 599 * just print the protocol number and address of the socket itself. 600 * The idea is not to duplicate netstat, but to make available enough 601 * information for further analysis. 602 */ 603 switch(dom.dom_family) { 604 case AF_INET: 605 getinetproto(proto.pr_protocol); 606 if (proto.pr_protocol == IPPROTO_TCP ) { 607 if (so.so_pcb) { 608 if (kvm_read(kd, (u_long)so.so_pcb, 609 (char *)&inpcb, sizeof(struct inpcb)) 610 != sizeof(struct inpcb)) { 611 dprintf(stderr, 612 "can't read inpcb at %x\n", 613 so.so_pcb); 614 goto bad; 615 } 616 printf(" %x", (int)inpcb.inp_ppcb); 617 } 618 } 619 else if (so.so_pcb) 620 printf(" %x", (int)so.so_pcb); 621 break; 622 case AF_UNIX: 623 /* print address of pcb and connected pcb */ 624 if (so.so_pcb) { 625 printf(" %x", (int)so.so_pcb); 626 if (kvm_read(kd, (u_long)so.so_pcb, (char *)&unpcb, 627 sizeof(struct unpcb)) != sizeof(struct unpcb)){ 628 dprintf(stderr, "can't read unpcb at %x\n", 629 so.so_pcb); 630 goto bad; 631 } 632 if (unpcb.unp_conn) { 633 char shoconn[4], *cp; 634 635 cp = shoconn; 636 if (!(so.so_state & SS_CANTRCVMORE)) 637 *cp++ = '<'; 638 *cp++ = '-'; 639 if (!(so.so_state & SS_CANTSENDMORE)) 640 *cp++ = '>'; 641 *cp = '\0'; 642 printf(" %s %x", shoconn, 643 (int)unpcb.unp_conn); 644 } 645 } 646 break; 647 default: 648 /* print protocol number and socket address */ 649 printf(" %d %x", proto.pr_protocol, (int)sock); 650 } 651 printf("\n"); 652 return; 653 bad: 654 printf("* error\n"); 655 } 656 657 /* 658 * getinetproto -- 659 * print name of protocol number 660 */ 661 void 662 getinetproto(number) 663 int number; 664 { 665 char *cp; 666 667 switch(number) { 668 case IPPROTO_IP: 669 cp = "ip"; break; 670 case IPPROTO_ICMP: 671 cp ="icmp"; break; 672 case IPPROTO_GGP: 673 cp ="ggp"; break; 674 case IPPROTO_TCP: 675 cp ="tcp"; break; 676 case IPPROTO_EGP: 677 cp ="egp"; break; 678 case IPPROTO_PUP: 679 cp ="pup"; break; 680 case IPPROTO_UDP: 681 cp ="udp"; break; 682 case IPPROTO_IDP: 683 cp ="idp"; break; 684 case IPPROTO_RAW: 685 cp ="raw"; break; 686 default: 687 printf(" %d", number); 688 return; 689 } 690 printf(" %s", cp); 691 } 692 693 getfname(filename) 694 char *filename; 695 { 696 struct stat statbuf; 697 DEVS *cur; 698 699 if (stat(filename, &statbuf)) { 700 fprintf(stderr, "fstat: %s: %s\n", filename, strerror(errno)); 701 return(0); 702 } 703 if ((cur = malloc(sizeof(DEVS))) == NULL) { 704 fprintf(stderr, "fstat: %s\n", strerror(errno)); 705 exit(1); 706 } 707 cur->next = devs; 708 devs = cur; 709 710 cur->ino = statbuf.st_ino; 711 cur->fsid = statbuf.st_dev & 0xffff; 712 cur->name = filename; 713 return(1); 714 } 715 716 void 717 usage() 718 { 719 (void)fprintf(stderr, 720 "usage: fstat [-fnv] [-p pid] [-u user] [-N system] [-M core] [file ...]\n"); 721 exit(1); 722 } 723