Home | History | Annotate | Line # | Download | only in fstat
fstat.c revision 1.15
      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 1.15 1996/02/20 16:04:47 fvdl 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:vNM")) != 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