xref: /netbsd-src/usr.sbin/pstat/pstat.c (revision da5f4674a3fc214be3572d358b66af40ab9401e7)
1 /*	$NetBSD: pstat.c,v 1.83 2003/08/07 11:25:38 agc Exp $	*/
2 
3 /*-
4  * Copyright (c) 1980, 1991, 1993, 1994
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. Neither the name of the University nor the names of its contributors
16  *    may be used to endorse or promote products derived from this software
17  *    without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29  * SUCH DAMAGE.
30  */
31 
32 #include <sys/cdefs.h>
33 #ifndef lint
34 __COPYRIGHT("@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
35 	The Regents of the University of California.  All rights reserved.\n");
36 #endif /* not lint */
37 
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)pstat.c	8.16 (Berkeley) 5/9/95";
41 #else
42 __RCSID("$NetBSD: pstat.c,v 1.83 2003/08/07 11:25:38 agc Exp $");
43 #endif
44 #endif /* not lint */
45 
46 #include <sys/param.h>
47 #include <sys/time.h>
48 #include <sys/vnode.h>
49 #include <sys/ucred.h>
50 #define _KERNEL
51 #include <sys/file.h>
52 #include <ufs/ufs/inode.h>
53 #define NFS
54 #include <sys/mount.h>
55 #undef NFS
56 #include <sys/uio.h>
57 #include <sys/namei.h>
58 #include <miscfs/genfs/layer.h>
59 #include <miscfs/union/union.h>
60 #undef _KERNEL
61 #include <sys/stat.h>
62 #include <nfs/nfsproto.h>
63 #include <nfs/rpcv2.h>
64 #include <nfs/nfs.h>
65 #include <nfs/nfsnode.h>
66 #include <sys/ioctl.h>
67 #include <sys/tty.h>
68 #include <sys/conf.h>
69 #include <sys/device.h>
70 
71 #include <sys/sysctl.h>
72 
73 #include <err.h>
74 #include <kvm.h>
75 #include <limits.h>
76 #include <nlist.h>
77 #include <stdio.h>
78 #include <stdlib.h>
79 #include <string.h>
80 #include <unistd.h>
81 
82 #include "swapctl.h"
83 
84 struct nlist nl[] = {
85 #define	V_MOUNTLIST	0
86 	{ "_mountlist" },	/* address of head of mount list. */
87 #define	V_NUMV		1
88 	{ "_numvnodes" },
89 #define	FNL_NFILE	2
90 	{ "_nfiles" },
91 #define FNL_MAXFILE	3
92 	{ "_maxfiles" },
93 #define TTY_NTTY	4
94 	{ "_tty_count" },
95 #define TTY_TTYLIST	5
96 	{ "_ttylist" },
97 #define NLMANDATORY TTY_TTYLIST	/* names up to here are mandatory */
98 	{ "" }
99 };
100 
101 int	usenumflag;
102 int	totalflag;
103 int	kflag;
104 char	*nlistf	= NULL;
105 char	*memf	= NULL;
106 kvm_t	*kd;
107 
108 static const struct {
109 	u_int m_flag;
110 	u_int m_visible;
111 	const char *m_name;
112 } mnt_flags[] = {
113 	__MNT_FLAGS
114 };
115 
116 struct flagbit_desc {
117 	u_int fd_flags;
118 	char fd_mark;
119 };
120 
121 #define	SVAR(var) __STRING(var)	/* to force expansion */
122 #define	KGET(idx, var)							\
123 	KGET1(idx, &var, sizeof(var), SVAR(var))
124 #define	KGET1(idx, p, s, msg)						\
125 	KGET2(nl[idx].n_value, p, s, msg)
126 #define	KGET2(addr, p, s, msg) do {					\
127 	if (kvm_read(kd, (u_long)(addr), p, s) != s)			\
128 		warnx("cannot read %s: %s", msg, kvm_geterr(kd));	\
129 } while (/* CONSTCOND */0)
130 #define	KGETRET(addr, p, s, msg) do {					\
131 	if (kvm_read(kd, (u_long)(addr), p, s) != s) {			\
132 		warnx("cannot read %s: %s", msg, kvm_geterr(kd));	\
133 		return (0);						\
134 	}								\
135 } while (/* CONSTCOND */0)
136 
137 #if 1				/* This is copied from vmstat/vmstat.c */
138 /*
139  * Print single word.  `ovflow' is number of characters didn't fit
140  * on the last word.  `fmt' is a format string to print this word.
141  * It must contain asterisk for field width.  `width' is a width
142  * occupied by this word.  `fixed' is a number of constant chars in
143  * `fmt'.  `val' is a value to be printed using format string `fmt'.
144  */
145 #define	PRWORD(ovflw, fmt, width, fixed, val) do {	\
146 	(ovflw) += printf((fmt),			\
147 	    (width) - (fixed) - (ovflw) > 0 ?		\
148 	    (width) - (fixed) - (ovflw) : 0,		\
149 	    (val)) - (width);				\
150 	if ((ovflw) < 0)				\
151 		(ovflw) = 0;				\
152 } while (/* CONSTCOND */0)
153 #endif
154 
155 void	filemode __P((void));
156 int	getfiles __P((char **, int *));
157 int	getflags __P((const struct flagbit_desc *, char *, u_int));
158 struct mount *
159 	getmnt __P((struct mount *));
160 char *	kinfo_vnodes __P((int *));
161 void	layer_header __P((void));
162 int	layer_print __P((struct vnode *, int));
163 char *	loadvnodes __P((int *));
164 int	main __P((int, char **));
165 void	mount_print __P((struct mount *));
166 void	nfs_header __P((void));
167 int	nfs_print __P((struct vnode *, int));
168 void	ttymode __P((void));
169 void	ttyprt __P((struct tty *));
170 void	ufs_header __P((void));
171 int	ufs_print __P((struct vnode *, int));
172 int	ext2fs_print __P((struct vnode *, int));
173 void	union_header __P((void));
174 int	union_print __P((struct vnode *, int));
175 void	usage __P((void));
176 void	vnode_header __P((void));
177 int	vnode_print __P((struct vnode *, struct vnode *));
178 void	vnodemode __P((void));
179 
180 int
181 main(argc, argv)
182 	int argc;
183 	char *argv[];
184 {
185 	int ch, i, quit, ret;
186 	int fileflag, swapflag, ttyflag, vnodeflag;
187 	gid_t egid = getegid();
188 	char buf[_POSIX2_LINE_MAX];
189 
190 	setegid(getgid());
191 	fileflag = swapflag = ttyflag = vnodeflag = 0;
192 	while ((ch = getopt(argc, argv, "TM:N:fiknstv")) != -1)
193 		switch (ch) {
194 		case 'f':
195 			fileflag = 1;
196 			break;
197 		case 'M':
198 			memf = optarg;
199 			break;
200 		case 'N':
201 			nlistf = optarg;
202 			break;
203 		case 'n':
204 			usenumflag = 1;
205 			break;
206 		case 's':
207 			swapflag = 1;
208 			break;
209 		case 'T':
210 			totalflag = 1;
211 			break;
212 		case 't':
213 			ttyflag = 1;
214 			break;
215 		case 'k':
216 			kflag = 1;
217 			break;
218 		case 'v':
219 		case 'i':		/* Backward compatibility. */
220 			vnodeflag = 1;
221 			break;
222 		default:
223 			usage();
224 		}
225 	argc -= optind;
226 	argv += optind;
227 
228 	/*
229 	 * Discard setgid privileges.  If not the running kernel, we toss
230 	 * them away totally so that bad guys can't print interesting stuff
231 	 * from kernel memory, otherwise switch back to kmem for the
232 	 * duration of the kvm_openfiles() call.
233 	 */
234 	if (nlistf != NULL || memf != NULL)
235 		(void)setgid(getgid());
236 	else
237 		(void)setegid(egid);
238 
239 	if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf)) == 0)
240 		errx(1, "kvm_openfiles: %s", buf);
241 
242 	/* get rid of it now anyway */
243 	if (nlistf == NULL && memf == NULL)
244 		(void)setgid(getgid());
245 	if ((ret = kvm_nlist(kd, nl)) != 0) {
246 		if (ret == -1)
247 			errx(1, "kvm_nlist: %s", kvm_geterr(kd));
248 		for (i = quit = 0; i <= NLMANDATORY; i++)
249 			if (!nl[i].n_value) {
250 				quit = 1;
251 				warnx("undefined symbol: %s", nl[i].n_name);
252 			}
253 		if (quit)
254 			exit(1);
255 	}
256 	if (!(fileflag | vnodeflag | ttyflag | swapflag | totalflag))
257 		usage();
258 	if (fileflag || totalflag)
259 		filemode();
260 	if (vnodeflag || totalflag)
261 		vnodemode();
262 	if (ttyflag)
263 		ttymode();
264 	if (swapflag || totalflag)
265 		list_swap(0, kflag, 0, totalflag, 1);
266 	exit(0);
267 }
268 
269 #define	VPTRSZ  sizeof(struct vnode *)
270 #define	VNODESZ sizeof(struct vnode)
271 #define	PTRSTRWIDTH ((int)sizeof(void *) * 2) /* Width of resulting string
272 						 when pointer is printed
273 						 in hexadecimal. */
274 
275 void
276 vnodemode()
277 {
278 	char *e_vnodebase, *endvnode, *evp;
279 	struct vnode *vp;
280 	struct mount *maddr, *mp;
281 	int numvnodes, ovflw;
282 	int (*vnode_fsprint)
283 	    __P((struct vnode *, int)); /* per-fs data printer */
284 
285 	mp = NULL;
286 	e_vnodebase = loadvnodes(&numvnodes);
287 	if (totalflag) {
288 		(void)printf("%7d vnodes\n", numvnodes);
289 		goto out;
290 	}
291 	endvnode = e_vnodebase + numvnodes * (VPTRSZ + VNODESZ);
292 	(void)printf("%d active vnodes\n", numvnodes);
293 
294 #define	ST	mp->mnt_stat
295 #define	FSTYPE_IS(mp, name)						\
296 	(strncmp((mp)->mnt_stat.f_fstypename, (name), MFSNAMELEN) == 0)
297 	maddr = NULL;
298 	vnode_fsprint = NULL;
299 	for (evp = e_vnodebase; evp < endvnode; evp += VPTRSZ + VNODESZ) {
300 		vp = (struct vnode *)(evp + VPTRSZ);
301 		if (vp->v_mount != maddr) {
302 			/*
303 			 * New filesystem
304 			 */
305 			if ((mp = getmnt(vp->v_mount)) == NULL)
306 				continue;
307 			maddr = vp->v_mount;
308 			mount_print(mp);
309 			vnode_header();
310 			if (FSTYPE_IS(mp, MOUNT_FFS) ||
311 			    FSTYPE_IS(mp, MOUNT_MFS)) {
312 				ufs_header();
313 				vnode_fsprint = ufs_print;
314 			} else if (FSTYPE_IS(mp, MOUNT_NFS)) {
315 				nfs_header();
316 				vnode_fsprint = nfs_print;
317 			} else if (FSTYPE_IS(mp, MOUNT_EXT2FS)) {
318 				ufs_header();
319 				vnode_fsprint = ext2fs_print;
320 			} else if (FSTYPE_IS(mp, MOUNT_NULL) ||
321 			    FSTYPE_IS(mp, MOUNT_OVERLAY) ||
322 			    FSTYPE_IS(mp, MOUNT_UMAP)) {
323 				layer_header();
324 				vnode_fsprint = layer_print;
325 			} else if (FSTYPE_IS(mp, MOUNT_UNION)) {
326 				union_header();
327 				vnode_fsprint = union_print;
328 			} else
329 				vnode_fsprint = NULL;
330 			(void)printf("\n");
331 		}
332 		ovflw = vnode_print(*(struct vnode **)evp, vp);
333 		if (VTOI(vp) != NULL && vnode_fsprint != NULL)
334 			(*vnode_fsprint)(vp, ovflw);
335 		(void)printf("\n");
336 	}
337 
338  out:
339 	free(e_vnodebase);
340 }
341 
342 int
343 getflags(fd, p, flags)
344 	const struct flagbit_desc *fd;
345 	char *p;
346 	u_int flags;
347 {
348 	char *q = p;
349 
350 	if (flags == 0) {
351 		*p++ = '-';
352 		*p = '\0';
353 		return (0);
354 	}
355 
356 	for (; fd->fd_flags != 0; fd++)
357 		if ((flags & fd->fd_flags) != 0)
358 			*p++ = fd->fd_mark;
359 	*p = '\0';
360 	return (p - q);
361 }
362 
363 const struct flagbit_desc vnode_flags[] = {
364 	{ VROOT,	'R' },
365 	{ VTEXT,	'T' },
366 	{ VSYSTEM,	'S' },
367 	{ VISTTY,	'I' },
368 	{ VEXECMAP,	'E' },
369 	{ VXLOCK,	'L' },
370 	{ VXWANT,	'W' },
371 	{ VBWAIT,	'B' },
372 	{ VALIASED,	'A' },
373 	{ VDIROP,	'D' },
374 	{ VLAYER,	'Y' },
375 	{ VONWORKLST,	'O' },
376 	{ 0,		'\0' },
377 };
378 
379 void
380 vnode_header()
381 {
382 
383 	(void)printf("%-*s TYP VFLAG  USE HOLD TAG NPAGE",
384 	    PTRSTRWIDTH, "ADDR");
385 }
386 
387 int
388 vnode_print(avnode, vp)
389 	struct vnode *avnode;
390 	struct vnode *vp;
391 {
392 	char *type, flags[sizeof(vnode_flags) / sizeof(vnode_flags[0])];
393 	int ovflw;
394 
395 	/*
396 	 * set type
397 	 */
398 	switch (vp->v_type) {
399 	case VNON:
400 		type = "non"; break;
401 	case VREG:
402 		type = "reg"; break;
403 	case VDIR:
404 		type = "dir"; break;
405 	case VBLK:
406 		type = "blk"; break;
407 	case VCHR:
408 		type = "chr"; break;
409 	case VLNK:
410 		type = "lnk"; break;
411 	case VSOCK:
412 		type = "soc"; break;
413 	case VFIFO:
414 		type = "fif"; break;
415 	case VBAD:
416 		type = "bad"; break;
417 	default:
418 		type = "unk"; break;
419 	}
420 	/*
421 	 * gather flags
422 	 */
423 	(void)getflags(vnode_flags, flags, vp->v_flag);
424 
425 	ovflw = 0;
426 	PRWORD(ovflw, "%*lx", PTRSTRWIDTH, 0, (long)avnode);
427 	PRWORD(ovflw, " %*s", 4, 1, type);
428 	PRWORD(ovflw, " %*s", 6, 1, flags);
429 	PRWORD(ovflw, " %*ld", 5, 1, (long)vp->v_usecount);
430 	PRWORD(ovflw, " %*ld", 5, 1, (long)vp->v_holdcnt);
431 	PRWORD(ovflw, " %*d", 4, 1, vp->v_tag);
432 	PRWORD(ovflw, " %*d", 6, 1, vp->v_uobj.uo_npages);
433 	return (ovflw);
434 }
435 
436 const struct flagbit_desc ufs_flags[] = {
437 	{ IN_ACCESS,	'A' },
438 	{ IN_CHANGE,	'C' },
439 	{ IN_UPDATE,	'U' },
440 	{ IN_MODIFIED,	'M' },
441 	{ IN_ACCESSED,	'a' },
442 	{ IN_RENAME,	'R' },
443 	{ IN_SHLOCK,	'S' },
444 	{ IN_EXLOCK,	'E' },
445 	{ IN_CLEANING,	'c' },
446 	{ IN_ADIROP,	'D' },
447 	{ IN_SPACECOUNTED, 's' },
448 	{ 0,		'\0' },
449 };
450 
451 void
452 ufs_header()
453 {
454 
455 	(void)printf(" FILEID IFLAG RDEV|SZ");
456 }
457 
458 int
459 ufs_print(vp, ovflw)
460 	struct vnode *vp;
461 	int ovflw;
462 {
463 	struct inode inode, *ip = &inode;
464 	union dinode {
465 		struct ufs1_dinode dp1;
466 		struct ufs2_dinode dp2;
467 	} dip;
468 	char flags[sizeof(ufs_flags) / sizeof(ufs_flags[0])];
469 	char dev[4 + 1 + 7 + 1]; /* 12bit marjor + 20bit minor */
470 	char *name;
471 	mode_t type;
472 	dev_t rdev;
473 
474 	KGETRET(VTOI(vp), &inode, sizeof(struct inode), "vnode's inode");
475 	KGETRET(ip->i_din.ffs1_din, &dip, sizeof (struct ufs1_dinode),
476 	    "inode's dinode");
477 
478 	if (ip->i_size == dip.dp1.di_size)
479 		rdev = dip.dp1.di_rdev;
480 	else {
481 		KGETRET(ip->i_din.ffs1_din, &dip, sizeof (struct ufs2_dinode),
482 		    "inode's UFS2 dinode");
483 		rdev = dip.dp2.di_rdev;
484 	}
485 
486 	/*
487 	 * XXX need to to locking state.
488 	 */
489 
490 	(void)getflags(ufs_flags, flags, ip->i_flag);
491 	PRWORD(ovflw, " %*d", 7, 1, ip->i_number);
492 	PRWORD(ovflw, " %*s", 6, 1, flags);
493 	type = ip->i_mode & S_IFMT;
494 	if (S_ISCHR(ip->i_mode) || S_ISBLK(ip->i_mode)) {
495 		if (usenumflag ||
496 		    (name = devname(rdev, type)) == NULL) {
497 			snprintf(dev, sizeof(dev), "%d,%d",
498 			    major(rdev), minor(rdev));
499 			name = dev;
500 		}
501 		PRWORD(ovflw, " %*s", 8, 1, name);
502 	} else
503 		PRWORD(ovflw, " %*lld", 8, 1, (long long)ip->i_size);
504 	return 0;
505 }
506 
507 int
508 ext2fs_print(vp, ovflw)
509 	struct vnode *vp;
510 	int ovflw;
511 {
512 	struct inode inode, *ip = &inode;
513 	char flags[sizeof(ufs_flags) / sizeof(ufs_flags[0])];
514 	char dev[4 + 1 + 7 + 1]; /* 12bit marjor + 20bit minor */
515 	char *name;
516 	mode_t type;
517 
518 	KGETRET(VTOI(vp), &inode, sizeof(struct inode), "vnode's inode");
519 
520 	/*
521 	 * XXX need to to locking state.
522 	 */
523 
524 	(void)getflags(ufs_flags, flags, ip->i_flag);
525 	PRWORD(ovflw, " %*d", 7, 1, ip->i_number);
526 	PRWORD(ovflw, " %*s", 6, 1, flags);
527 	type = ip->i_e2fs_mode & S_IFMT;
528 	if (S_ISCHR(ip->i_e2fs_mode) || S_ISBLK(ip->i_e2fs_mode)) {
529 		if (usenumflag ||
530 		    (name = devname(ip->i_e2fs_rdev, type)) == NULL) {
531 			snprintf(dev, sizeof(dev), "%d,%d",
532 			    major(ip->i_e2fs_rdev), minor(ip->i_e2fs_rdev));
533 			name = dev;
534 		}
535 		PRWORD(ovflw, " %*s", 8, 1, name);
536 	} else
537 		PRWORD(ovflw, " %*u", 8, 1, (u_int)ip->i_e2fs_size);
538 	return (0);
539 }
540 
541 const struct flagbit_desc nfs_flags[] = {
542 	{ NFLUSHWANT,	'W' },
543 	{ NFLUSHINPROG,	'P' },
544 	{ NMODIFIED,	'M' },
545 	{ NWRITEERR,	'E' },
546 	{ NQNFSNONCACHE, 'X' },
547 	{ NQNFSWRITE,	'O' },
548 	{ NQNFSEVICTED,	'G' },
549 	{ NACC,		'A' },
550 	{ NUPD,		'U' },
551 	{ NCHG,		'C' },
552 	{ 0,		'\0' },
553 };
554 
555 void
556 nfs_header()
557 {
558 
559 	(void)printf(" FILEID NFLAG RDEV|SZ");
560 }
561 
562 int
563 nfs_print(vp, ovflw)
564 	struct vnode *vp;
565 	int ovflw;
566 {
567 	struct nfsnode nfsnode, *np = &nfsnode;
568 	char flags[sizeof(nfs_flags) / sizeof(nfs_flags[0])];
569 	char dev[4 + 1 + 7 + 1]; /* 12bit marjor + 20bit minor */
570 	struct vattr va;
571 	char *name;
572 	mode_t type;
573 
574 	KGETRET(VTONFS(vp), &nfsnode, sizeof(nfsnode), "vnode's nfsnode");
575 	(void)getflags(nfs_flags, flags, np->n_flag);
576 
577 	KGETRET(np->n_vattr, &va, sizeof(va), "vnode attr");
578 	PRWORD(ovflw, " %*ld", 7, 1, (long)va.va_fileid);
579 	PRWORD(ovflw, " %*s", 6, 1, flags);
580 	switch (va.va_type) {
581 	case VCHR:
582 		type = S_IFCHR;
583 		goto device;
584 
585 	case VBLK:
586 		type = S_IFBLK;
587 	device:
588 		if (usenumflag || (name = devname(va.va_rdev, type)) == NULL) {
589 			(void)snprintf(dev, sizeof(dev), "%d,%d",
590 			    major(va.va_rdev), minor(va.va_rdev));
591 			name = dev;
592 		}
593 		PRWORD(ovflw, " %*s", 8, 1, name);
594 		break;
595 	default:
596 		PRWORD(ovflw, " %*lld", 8, 1, (long long)np->n_size);
597 		break;
598 	}
599 	return (0);
600 }
601 
602 void
603 layer_header()
604 {
605 
606 	(void)printf(" %*s", PTRSTRWIDTH, "LOWER");
607 }
608 
609 int
610 layer_print(vp, ovflw)
611 	struct vnode *vp;
612 	int ovflw;
613 {
614 	struct layer_node lnode, *lp = &lnode;
615 
616 	KGETRET(VTOLAYER(vp), &lnode, sizeof(lnode), "layer vnode");
617 
618 	PRWORD(ovflw, " %*lx", PTRSTRWIDTH + 1, 1, (long)lp->layer_lowervp);
619 	return (0);
620 }
621 
622 void
623 union_header()
624 {
625 
626 	(void)printf(" %*s %*s", PTRSTRWIDTH, "UPPER", PTRSTRWIDTH, "LOWER");
627 }
628 
629 int
630 union_print(vp, ovflw)
631 	struct vnode *vp;
632 	int ovflw;
633 {
634 	struct union_node unode, *up = &unode;
635 
636 	KGETRET(VTOUNION(vp), &unode, sizeof(unode), "vnode's unode");
637 
638 	PRWORD(ovflw, " %*lx", PTRSTRWIDTH + 1, 1, (long)up->un_uppervp);
639 	PRWORD(ovflw, " %*lx", PTRSTRWIDTH + 1, 1, (long)up->un_lowervp);
640 	return (0);
641 }
642 
643 /*
644  * Given a pointer to a mount structure in kernel space,
645  * read it in and return a usable pointer to it.
646  */
647 struct mount *
648 getmnt(maddr)
649 	struct mount *maddr;
650 {
651 	static struct mtab {
652 		struct mtab *next;
653 		struct mount *maddr;
654 		struct mount mount;
655 	} *mhead = NULL;
656 	struct mtab *mt;
657 
658 	for (mt = mhead; mt != NULL; mt = mt->next)
659 		if (maddr == mt->maddr)
660 			return (&mt->mount);
661 	if ((mt = malloc(sizeof(struct mtab))) == NULL)
662 		err(1, "malloc");
663 	KGETRET(maddr, &mt->mount, sizeof(struct mount), "mount table");
664 	mt->maddr = maddr;
665 	mt->next = mhead;
666 	mhead = mt;
667 	return (&mt->mount);
668 }
669 
670 void
671 mount_print(mp)
672 	struct mount *mp;
673 {
674 	int flags;
675 
676 	(void)printf("*** MOUNT %s %s on %s", ST.f_fstypename,
677 	    ST.f_mntfromname, ST.f_mntonname);
678 	if ((flags = mp->mnt_flag) != 0) {
679 		int i;
680 		const char *sep = " (";
681 
682 		for (i = 0; i <= sizeof mnt_flags / sizeof mnt_flags[0]; i++) {
683 			if (flags & mnt_flags[i].m_flag) {
684 				(void)printf("%s%s", sep, mnt_flags[i].m_name);
685 				flags &= ~mnt_flags[i].m_flag;
686 				sep = ",";
687 			}
688 		}
689 		if (flags)
690 			(void)printf("%sunknown_flags:%x", sep, flags);
691 		(void)printf(")");
692 	}
693 	(void)printf("\n");
694 }
695 
696 char *
697 loadvnodes(avnodes)
698 	int *avnodes;
699 {
700 	int mib[2];
701 	size_t copysize;
702 	char *vnodebase;
703 
704 	if (memf != NULL) {
705 		/*
706 		 * do it by hand
707 		 */
708 		return (kinfo_vnodes(avnodes));
709 	}
710 	mib[0] = CTL_KERN;
711 	mib[1] = KERN_VNODE;
712 	if (sysctl(mib, 2, NULL, &copysize, NULL, 0) == -1)
713 		err(1, "sysctl: KERN_VNODE");
714 	if ((vnodebase = malloc(copysize)) == NULL)
715 		err(1, "malloc");
716 	if (sysctl(mib, 2, vnodebase, &copysize, NULL, 0) == -1)
717 		err(1, "sysctl: KERN_VNODE");
718 	if (copysize % (VPTRSZ + VNODESZ))
719 		errx(1, "vnode size mismatch");
720 	*avnodes = copysize / (VPTRSZ + VNODESZ);
721 
722 	return (vnodebase);
723 }
724 
725 /*
726  * simulate what a running kernel does in in kinfo_vnode
727  */
728 char *
729 kinfo_vnodes(avnodes)
730 	int *avnodes;
731 {
732 	struct mntlist mountlist;
733 	struct mount *mp, mount;
734 	struct vnode *vp, vnode;
735 	char *beg, *bp, *ep;
736 	int numvnodes;
737 
738 	KGET(V_NUMV, numvnodes);
739 	if ((bp = malloc((numvnodes + 20) * (VPTRSZ + VNODESZ))) == NULL)
740 		err(1, "malloc");
741 	beg = bp;
742 	ep = bp + (numvnodes + 20) * (VPTRSZ + VNODESZ);
743 	KGET(V_MOUNTLIST, mountlist);
744 	for (mp = mountlist.cqh_first;;
745 	    mp = mount.mnt_list.cqe_next) {
746 		KGET2(mp, &mount, sizeof(mount), "mount entry");
747 		for (vp = mount.mnt_vnodelist.lh_first;
748 		    vp != NULL; vp = vnode.v_mntvnodes.le_next) {
749 			KGET2(vp, &vnode, sizeof(vnode), "vnode");
750 			if (bp + VPTRSZ + VNODESZ > ep)
751 				/* XXX - should realloc */
752 				errx(1, "no more room for vnodes");
753 			memmove(bp, &vp, VPTRSZ);
754 			bp += VPTRSZ;
755 			memmove(bp, &vnode, VNODESZ);
756 			bp += VNODESZ;
757 		}
758 		if (mp == mountlist.cqh_last)
759 			break;
760 	}
761 	*avnodes = (bp - beg) / (VPTRSZ + VNODESZ);
762 	return (beg);
763 }
764 
765 void
766 ttymode()
767 {
768 	int ntty;
769 	struct ttylist_head tty_head;
770 	struct tty *tp, tty;
771 
772 	KGET(TTY_NTTY, ntty);
773 	(void)printf("%d terminal device%s\n", ntty, ntty == 1 ? "" : "s");
774 	KGET(TTY_TTYLIST, tty_head);
775 	(void)printf(
776 	    "  LINE RAW CAN OUT  HWT LWT     COL STATE  %-*s  PGID DISC\n",
777 	    PTRSTRWIDTH, "SESS");
778 	for (tp = tty_head.tqh_first; tp; tp = tty.tty_link.tqe_next) {
779 		KGET2(tp, &tty, sizeof tty, "tty struct");
780 		ttyprt(&tty);
781 	}
782 }
783 
784 static const struct flagbit_desc ttystates[] = {
785 	{ TS_ISOPEN,	'O'},
786 	{ TS_DIALOUT,	'>'},
787 	{ TS_CARR_ON,	'C'},
788 	{ TS_TIMEOUT,	'T'},
789 	{ TS_FLUSH,	'F'},
790 	{ TS_BUSY,	'B'},
791 	{ TS_ASLEEP,	'A'},
792 	{ TS_XCLUDE,	'X'},
793 	{ TS_TTSTOP,	'S'},
794 	{ TS_TBLOCK,	'K'},
795 	{ TS_ASYNC,	'Y'},
796 	{ TS_BKSL,	'D'},
797 	{ TS_ERASE,	'E'},
798 	{ TS_LNCH,	'L'},
799 	{ TS_TYPEN,	'P'},
800 	{ TS_CNTTB,	'N'},
801 	{ 0,		'\0'},
802 };
803 
804 void
805 ttyprt(tp)
806 	struct tty *tp;
807 {
808 	char state[sizeof(ttystates) / sizeof(ttystates[0]) + 1];
809 	char dev[2 + 3 + 1 + 5 + 1]; /* 12bit major + 20bit minor */
810 	struct linesw t_linesw;
811 	char *name, buffer;
812 	pid_t pgid;
813 	int n, ovflw;
814 
815 	if (usenumflag || (name = devname(tp->t_dev, S_IFCHR)) == NULL) {
816 		(void)snprintf(dev, sizeof(dev), "0x%3x:%x",
817 		    major(tp->t_dev), minor(tp->t_dev));
818 		name = dev;
819 	}
820 	ovflw = 0;
821 	PRWORD(ovflw, "%-*s", 7, 0, name);
822 	PRWORD(ovflw, " %*d", 3, 1, tp->t_rawq.c_cc);
823 	PRWORD(ovflw, " %*d", 4, 1, tp->t_canq.c_cc);
824 	PRWORD(ovflw, " %*d", 4, 1, tp->t_outq.c_cc);
825 	PRWORD(ovflw, " %*d", 5, 1, tp->t_hiwat);
826 	PRWORD(ovflw, " %*d", 4, 1, tp->t_lowat);
827 	PRWORD(ovflw, " %*d", 8, 1, tp->t_column);
828 	n = getflags(ttystates, state, tp->t_state);
829 	if (tp->t_wopen) {
830 		state[n++] = 'W';
831 		state[n] = '\0';
832 	}
833 	PRWORD(ovflw, " %-*s", 7, 1, state);
834 	PRWORD(ovflw, " %*lX", PTRSTRWIDTH + 1, 1, (u_long)tp->t_session);
835 	pgid = 0;
836 	if (tp->t_pgrp != NULL)
837 		KGET2(&tp->t_pgrp->pg_id, &pgid, sizeof(pid_t), "pgid");
838 	PRWORD(ovflw, " %*d", 6, 1, pgid);
839 	KGET2(tp->t_linesw, &t_linesw, sizeof(t_linesw),
840 	    "line discipline switch table");
841 	name = t_linesw.l_name;
842 	(void)putchar(' ');
843 	for (;;) {
844 		KGET2(name, &buffer, sizeof(buffer), "line discipline name");
845 		if (buffer == '\0')
846 			break;
847 		(void)putchar(buffer);
848 		name++;
849 	}
850 	(void)putchar('\n');
851 }
852 
853 static const struct flagbit_desc filemode_flags[] = {
854 	{ FREAD,	'R' },
855 	{ FWRITE,	'W' },
856 	{ FAPPEND,	'A' },
857 #ifdef FSHLOCK	/* currently gone */
858 	{ FSHLOCK,	'S' },
859 	{ FEXLOCK,	'X' },
860 #endif
861 	{ FASYNC,	'I' },
862 	{ 0,		'\0' },
863 };
864 
865 void
866 filemode()
867 {
868 	struct file *fp;
869 	struct file *addr;
870 	char flags[sizeof(filemode_flags) / sizeof(filemode_flags[0])];
871 	char *buf;
872 	int len, maxfile, nfile, ovflw;
873 	static const char * const dtypes[] =
874 		{ "???", "inode", "socket", "pipe" };
875 
876 	KGET(FNL_MAXFILE, maxfile);
877 	if (totalflag) {
878 		KGET(FNL_NFILE, nfile);
879 		(void)printf("%3d/%3d files\n", nfile, maxfile);
880 		return;
881 	}
882 	if (getfiles(&buf, &len) == -1)
883 		return;
884 	/*
885 	 * Getfiles returns in malloc'd memory a pointer to the first file
886 	 * structure, and then an array of file structs (whose addresses are
887 	 * derivable from the previous entry).
888 	 */
889 	addr = ((struct filelist *)buf)->lh_first;
890 	fp = (struct file *)(buf + sizeof(struct filelist));
891 	nfile = (len - sizeof(struct filelist)) / sizeof(struct file);
892 
893 	(void)printf("%d/%d open files\n", nfile, maxfile);
894 	(void)printf("%*s%s%*s TYPE    FLG     CNT  MSG  %*s%s%*s  OFFSET\n",
895 	    (PTRSTRWIDTH - 4) / 2, "", " LOC", (PTRSTRWIDTH - 4) / 2, "",
896 	    (PTRSTRWIDTH - 4) / 2, "", "DATA", (PTRSTRWIDTH - 4) / 2, "");
897 	for (; (char *)fp < buf + len; addr = fp->f_list.le_next, fp++) {
898 		if ((unsigned)fp->f_type > DTYPE_PIPE)
899 			continue;
900 		ovflw = 0;
901 		(void)getflags(filemode_flags, flags, fp->f_flag);
902 		PRWORD(ovflw, "%*lx", PTRSTRWIDTH, 0, (long)addr);
903 		PRWORD(ovflw, " %-*s", 9, 1, dtypes[fp->f_type]);
904 		PRWORD(ovflw, " %*s", 6, 1, flags);
905 		PRWORD(ovflw, " %*d", 5, 1, fp->f_count);
906 		PRWORD(ovflw, " %*d", 5, 1, fp->f_msgcount);
907 		PRWORD(ovflw, "  %*lx", PTRSTRWIDTH + 1, 2, (long)fp->f_data);
908 		if (fp->f_offset < 0)
909 			PRWORD(ovflw, "  %-*llx\n", PTRSTRWIDTH + 1, 2,
910 			    (long long)fp->f_offset);
911 		else
912 			PRWORD(ovflw, "  %-*lld\n", PTRSTRWIDTH + 1, 2,
913 			    (long long)fp->f_offset);
914 	}
915 	free(buf);
916 }
917 
918 int
919 getfiles(abuf, alen)
920 	char **abuf;
921 	int *alen;
922 {
923 	size_t len;
924 	int mib[2];
925 	char *buf;
926 
927 	/*
928 	 * XXX
929 	 * Add emulation of KINFO_FILE here.
930 	 */
931 	if (memf != NULL)
932 		errx(1, "files on dead kernel, not implemented");
933 
934 	mib[0] = CTL_KERN;
935 	mib[1] = KERN_FILE;
936 	if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1) {
937 		warn("sysctl: KERN_FILE");
938 		return (-1);
939 	}
940 	if ((buf = malloc(len)) == NULL)
941 		err(1, "malloc");
942 	if (sysctl(mib, 2, buf, &len, NULL, 0) == -1) {
943 		warn("sysctl: KERN_FILE");
944 		return (-1);
945 	}
946 	*abuf = buf;
947 	*alen = len;
948 	return (0);
949 }
950 
951 void
952 usage()
953 {
954 
955 	(void)fprintf(stderr,
956 	    "usage: %s [-T|-f|-s|-t|-v] [-kn] [-M core] [-N system]\n",
957 	    getprogname());
958 	exit(1);
959 }
960