pstat.c revision 183276 
1/*-
2 * Copyright (c) 1980, 1991, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 * Copyright (c) 2002 Networks Associates Technologies, Inc.
5 * All rights reserved.
6 *
7 * Portions of this software were developed for the FreeBSD Project by
8 * ThinkSec AS and NAI Labs, the Security Research Division of Network
9 * Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
10 * ("CBOSS"), as part of the DARPA CHATS research program.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#if 0
38#ifndef lint
39static const char copyright[] =
40"@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
41	The Regents of the University of California.  All rights reserved.\n";
42#endif /* not lint */
43
44#ifndef lint
45static char sccsid[] = "@(#)pstat.c	8.16 (Berkeley) 5/9/95";
46#endif /* not lint */
47#endif
48#include <sys/cdefs.h>
49__FBSDID("$FreeBSD: head/usr.sbin/pstat/pstat.c 183276 2008-09-22 19:25:14Z ed $");
50
51#include <sys/param.h>
52#include <sys/time.h>
53#include <sys/file.h>
54#include <sys/stat.h>
55#include <sys/stdint.h>
56#include <sys/ioctl.h>
57#include <sys/tty.h>
58#include <sys/blist.h>
59
60#include <sys/sysctl.h>
61#include <vm/vm_param.h>
62
63#include <err.h>
64#include <errno.h>
65#include <fcntl.h>
66#include <kvm.h>
67#include <libutil.h>
68#include <limits.h>
69#include <nlist.h>
70#include <stdio.h>
71#include <stdlib.h>
72#include <string.h>
73#include <unistd.h>
74
75enum {
76	NL_CONSTTY,
77	NL_MAXFILES,
78	NL_NFILES,
79	NL_TTY_LIST
80};
81
82static struct nlist nl[] = {
83	{ .n_name = "_constty" },
84	{ .n_name = "_maxfiles" },
85	{ .n_name = "_openfiles" },
86	{ .n_name = "_tty_list" },
87	{ .n_name = "" }
88};
89
90static int	humanflag;
91static int	usenumflag;
92static int	totalflag;
93static int	swapflag;
94static char	*nlistf;
95static char	*memf;
96static kvm_t	*kd;
97
98static char	*usagestr;
99
100static void	filemode(void);
101static int	getfiles(char **, size_t *);
102static void	swapmode(void);
103static void	ttymode(void);
104static void	ttyprt(struct xtty *);
105static void	usage(void);
106
107int
108main(int argc, char *argv[])
109{
110	int ch, i, quit, ret;
111	int fileflag, ttyflag;
112	char buf[_POSIX2_LINE_MAX],*opts;
113
114	fileflag = swapflag = ttyflag = 0;
115
116	/* We will behave like good old swapinfo if thus invoked */
117	opts = strrchr(argv[0], '/');
118	if (opts)
119		opts++;
120	else
121		opts = argv[0];
122	if (!strcmp(opts, "swapinfo")) {
123		swapflag = 1;
124		opts = "ghkmM:N:";
125		usagestr = "swapinfo [-ghkm] [-M core [-N system]]";
126	} else {
127		opts = "TM:N:fghkmnst";
128		usagestr = "pstat [-Tfghkmnst] [-M core [-N system]]";
129	}
130
131	while ((ch = getopt(argc, argv, opts)) != -1)
132		switch (ch) {
133		case 'f':
134			fileflag = 1;
135			break;
136		case 'g':
137			setenv("BLOCKSIZE", "1G", 1);
138			break;
139		case 'h':
140			humanflag = 1;
141			break;
142		case 'k':
143			setenv("BLOCKSIZE", "1K", 1);
144			break;
145		case 'm':
146			setenv("BLOCKSIZE", "1M", 1);
147			break;
148		case 'M':
149			memf = optarg;
150			break;
151		case 'N':
152			nlistf = optarg;
153			break;
154		case 'n':
155			usenumflag = 1;
156			break;
157		case 's':
158			++swapflag;
159			break;
160		case 'T':
161			totalflag = 1;
162			break;
163		case 't':
164			ttyflag = 1;
165			break;
166		default:
167			usage();
168		}
169	argc -= optind;
170	argv += optind;
171
172	if (memf != NULL) {
173		kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
174		if (kd == NULL)
175			errx(1, "kvm_openfiles: %s", buf);
176		if ((ret = kvm_nlist(kd, nl)) != 0) {
177			if (ret == -1)
178				errx(1, "kvm_nlist: %s", kvm_geterr(kd));
179			quit = 0;
180			for (i = 0; nl[i].n_name[0] != '\0'; ++i)
181				if (nl[i].n_value == 0) {
182					quit = 1;
183					warnx("undefined symbol: %s",
184					    nl[i].n_name);
185				}
186			if (quit)
187				exit(1);
188		}
189	}
190	if (!(fileflag | ttyflag | swapflag | totalflag))
191		usage();
192	if (fileflag || totalflag)
193		filemode();
194	if (ttyflag)
195		ttymode();
196	if (swapflag || totalflag)
197		swapmode();
198	exit (0);
199}
200
201static void
202usage(void)
203{
204	fprintf(stderr, "usage: %s\n", usagestr);
205	exit (1);
206}
207
208static const char fhdr32[] =
209  "   LOC   TYPE   FLG  CNT MSG   DATA        OFFSET\n";
210/* c0000000 ------ RWAI 123 123 c0000000 1000000000000000 */
211
212static const char fhdr64[] =
213  "       LOC       TYPE   FLG  CNT MSG       DATA            OFFSET\n";
214/* c000000000000000 ------ RWAI 123 123 c000000000000000 1000000000000000 */
215
216static const char hdr[] =
217"      LINE   INQ  CAN  LIN  LOW  OUTQ  USE  LOW   COL  SESS  PGID STATE\n";
218
219static void
220ttymode_kvm(void)
221{
222	TAILQ_HEAD(, tty) tl;
223	struct tty *tp, tty;
224	struct xtty xt;
225
226	(void)printf("%s", hdr);
227	bzero(&xt, sizeof xt);
228	xt.xt_size = sizeof xt;
229	if (kvm_read(kd, nl[NL_TTY_LIST].n_value, &tl, sizeof tl) != sizeof tl)
230		errx(1, "kvm_read(): %s", kvm_geterr(kd));
231	tp = TAILQ_FIRST(&tl);
232	while (tp != NULL) {
233		if (kvm_read(kd, (u_long)tp, &tty, sizeof tty) != sizeof tty)
234			errx(1, "kvm_read(): %s", kvm_geterr(kd));
235		xt.xt_insize = tty.t_inq.ti_nblocks * TTYINQ_DATASIZE;
236		xt.xt_incc = tty.t_inq.ti_linestart - tty.t_inq.ti_begin;
237		xt.xt_inlc = tty.t_inq.ti_end - tty.t_inq.ti_linestart;
238		xt.xt_inlow = tty.t_inlow;
239		xt.xt_outsize = tty.t_outq.to_nblocks * TTYOUTQ_DATASIZE;
240		xt.xt_outcc = tty.t_outq.to_end - tty.t_outq.to_begin;
241		xt.xt_outlow = tty.t_outlow;
242		xt.xt_column = tty.t_column;
243		/* xt.xt_pgid = ... */
244		/* xt.xt_sid = ... */
245		xt.xt_flags = tty.t_flags;
246		xt.xt_dev = NODEV;
247		ttyprt(&xt);
248		tp = TAILQ_NEXT(&tty, t_list);
249	}
250}
251
252static void
253ttymode_sysctl(void)
254{
255	struct xtty *xt, *end;
256	void *xttys;
257	size_t len;
258
259	(void)printf("%s", hdr);
260	if ((xttys = malloc(len = sizeof *xt)) == NULL)
261		err(1, "malloc()");
262	while (sysctlbyname("kern.ttys", xttys, &len, 0, 0) == -1) {
263		if (errno != ENOMEM)
264			err(1, "sysctlbyname()");
265		len *= 2;
266		if ((xttys = realloc(xttys, len)) == NULL)
267			err(1, "realloc()");
268	}
269	if (len > 0) {
270		end = (struct xtty *)((char *)xttys + len);
271		for (xt = xttys; xt < end; xt++)
272			ttyprt(xt);
273	}
274}
275
276static void
277ttymode(void)
278{
279
280	if (kd != NULL)
281		ttymode_kvm();
282	else
283		ttymode_sysctl();
284}
285
286static struct {
287	int flag;
288	char val;
289} ttystates[] = {
290#if 0
291	{ TF_NOPREFIX,	'N' },
292#endif
293	{ TF_INITLOCK,	'I' },
294	{ TF_CALLOUT,	'C' },
295
296	/* Keep these together -> 'Oi' and 'Oo'. */
297	{ TF_OPENED,	'O' },
298	{ TF_OPENED_IN,	'i' },
299	{ TF_OPENED_OUT,'o' },
300
301	{ TF_GONE,	'G' },
302	{ TF_OPENCLOSE,	'B' },
303	{ TF_ASYNC,	'Y' },
304	{ TF_LITERAL,	'L' },
305
306	/* Keep these together -> 'Hi' and 'Ho'. */
307	{ TF_HIWAT,	'H' },
308	{ TF_HIWAT_IN,	'i' },
309	{ TF_HIWAT_OUT,	'o' },
310
311	{ TF_STOPPED,	'S' },
312	{ TF_EXCLUDE,	'X' },
313	{ TF_BYPASS,	'l' },
314	{ TF_ZOMBIE,	'Z' },
315	{ TF_HOOK,	's' },
316
317	{ 0,	       '\0' },
318};
319
320static void
321ttyprt(struct xtty *xt)
322{
323	int i, j;
324	char *name;
325
326	if (xt->xt_size != sizeof *xt)
327		errx(1, "struct xtty size mismatch");
328	if (usenumflag || xt->xt_dev == 0 ||
329	   (name = devname(xt->xt_dev, S_IFCHR)) == NULL)
330		printf("%5d,%4d ", major(xt->xt_dev), minor(xt->xt_dev));
331	else
332		printf("%10s ", name);
333	printf("%5zu %4zu %4zu %4zu %5zu %4zu %4zu %5u %5d %5d ",
334	    xt->xt_insize, xt->xt_incc, xt->xt_inlc,
335	    (xt->xt_insize - xt->xt_inlow), xt->xt_outsize,
336	    xt->xt_outcc, (xt->xt_outsize - xt->xt_outlow),
337	    xt->xt_column, xt->xt_sid, xt->xt_pgid);
338	for (i = j = 0; ttystates[i].flag; i++)
339		if (xt->xt_flags & ttystates[i].flag) {
340			putchar(ttystates[i].val);
341			j++;
342		}
343	if (j == 0)
344		putchar('-');
345	putchar('\n');
346}
347
348static void
349filemode(void)
350{
351	struct xfile *fp;
352	char *buf, flagbuf[16], *fbp;
353	int maxf, openf;
354	size_t len;
355	static char *dtypes[] = { "???", "inode", "socket", "pipe",
356	    "fifo", "kqueue", "crypto" };
357	int i;
358	int wid;
359
360	if (kd != NULL) {
361		if (kvm_read(kd, nl[NL_MAXFILES].n_value,
362			&maxf, sizeof maxf) != sizeof maxf ||
363		    kvm_read(kd, nl[NL_NFILES].n_value,
364			&openf, sizeof openf) != sizeof openf)
365			errx(1, "kvm_read(): %s", kvm_geterr(kd));
366	} else {
367		len = sizeof(int);
368		if (sysctlbyname("kern.maxfiles", &maxf, &len, 0, 0) == -1 ||
369		    sysctlbyname("kern.openfiles", &openf, &len, 0, 0) == -1)
370			err(1, "sysctlbyname()");
371	}
372
373	if (totalflag) {
374		(void)printf("%3d/%3d files\n", openf, maxf);
375		return;
376	}
377	if (getfiles(&buf, &len) == -1)
378		return;
379	openf = len / sizeof *fp;
380
381	(void)printf("%d/%d open files\n", openf, maxf);
382	printf(sizeof(uintptr_t) == 4 ? fhdr32 : fhdr64);
383	wid = (int)sizeof(uintptr_t) * 2;
384	for (fp = (struct xfile *)buf, i = 0; i < openf; ++fp, ++i) {
385		if ((size_t)fp->xf_type >= sizeof(dtypes) / sizeof(dtypes[0]))
386			continue;
387		(void)printf("%*jx", wid, (uintmax_t)(uintptr_t)fp->xf_file);
388		(void)printf(" %-6.6s", dtypes[fp->xf_type]);
389		fbp = flagbuf;
390		if (fp->xf_flag & FREAD)
391			*fbp++ = 'R';
392		if (fp->xf_flag & FWRITE)
393			*fbp++ = 'W';
394		if (fp->xf_flag & FAPPEND)
395			*fbp++ = 'A';
396		if (fp->xf_flag & FASYNC)
397			*fbp++ = 'I';
398		*fbp = '\0';
399		(void)printf(" %4s %3d", flagbuf, fp->xf_count);
400		(void)printf(" %3d", fp->xf_msgcount);
401		(void)printf(" %*jx", wid, (uintmax_t)(uintptr_t)fp->xf_data);
402		(void)printf(" %*jx\n", (int)sizeof(fp->xf_offset) * 2,
403		    (uintmax_t)fp->xf_offset);
404	}
405	free(buf);
406}
407
408static int
409getfiles(char **abuf, size_t *alen)
410{
411	size_t len;
412	int mib[2];
413	char *buf;
414
415	/*
416	 * XXX
417	 * Add emulation of KINFO_FILE here.
418	 */
419	if (kd != NULL)
420		errx(1, "files on dead kernel, not implemented");
421
422	mib[0] = CTL_KERN;
423	mib[1] = KERN_FILE;
424	if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1) {
425		warn("sysctl: KERN_FILE");
426		return (-1);
427	}
428	if ((buf = malloc(len)) == NULL)
429		errx(1, "malloc");
430	if (sysctl(mib, 2, buf, &len, NULL, 0) == -1) {
431		warn("sysctl: KERN_FILE");
432		return (-1);
433	}
434	*abuf = buf;
435	*alen = len;
436	return (0);
437}
438
439/*
440 * swapmode is based on a program called swapinfo written
441 * by Kevin Lahey <kml@rokkaku.atl.ga.us>.
442 */
443
444#define CONVERT(v)	((int64_t)(v) * pagesize / blocksize)
445static struct kvm_swap swtot;
446static int nswdev;
447
448static void
449print_swap_header(void)
450{
451	int hlen;
452	long blocksize;
453	const char *header;
454
455	header = getbsize(&hlen, &blocksize);
456	if (totalflag == 0)
457		(void)printf("%-15s %*s %8s %8s %8s\n",
458		    "Device", hlen, header,
459		    "Used", "Avail", "Capacity");
460}
461
462static void
463print_swap_line(const char *devname, intmax_t nblks, intmax_t bused,
464    intmax_t bavail, float bpercent)
465{
466	char usedbuf[5];
467	char availbuf[5];
468	int hlen, pagesize;
469	long blocksize;
470
471	pagesize = getpagesize();
472	getbsize(&hlen, &blocksize);
473
474	printf("%-15s %*jd ", devname, hlen, CONVERT(nblks));
475	if (humanflag) {
476		humanize_number(usedbuf, sizeof(usedbuf),
477		    CONVERT(blocksize * bused), "",
478		    HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
479		humanize_number(availbuf, sizeof(availbuf),
480		    CONVERT(blocksize * bavail), "",
481		    HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
482		printf("%8s %8s %5.0f%%\n", usedbuf, availbuf, bpercent);
483	} else {
484		printf("%8jd %8jd %5.0f%%\n", (intmax_t)CONVERT(bused),
485		    (intmax_t)CONVERT(bavail), bpercent);
486	}
487}
488
489static void
490print_swap(struct kvm_swap *ksw)
491{
492
493	swtot.ksw_total += ksw->ksw_total;
494	swtot.ksw_used += ksw->ksw_used;
495	++nswdev;
496	if (totalflag == 0)
497		print_swap_line(ksw->ksw_devname, ksw->ksw_total,
498		    ksw->ksw_used, ksw->ksw_total - ksw->ksw_used,
499		    (ksw->ksw_used * 100.0) / ksw->ksw_total);
500}
501
502static void
503print_swap_total(void)
504{
505	int hlen, pagesize;
506	long blocksize;
507
508	pagesize = getpagesize();
509	getbsize(&hlen, &blocksize);
510	if (totalflag) {
511		blocksize = 1024 * 1024;
512		(void)printf("%jdM/%jdM swap space\n",
513		    CONVERT(swtot.ksw_used), CONVERT(swtot.ksw_total));
514	} else if (nswdev > 1) {
515		print_swap_line("Total", swtot.ksw_total, swtot.ksw_used,
516		    swtot.ksw_total - swtot.ksw_used,
517		    (swtot.ksw_used * 100.0) / swtot.ksw_total);
518	}
519}
520
521static void
522swapmode_kvm(void)
523{
524	struct kvm_swap kswap[16];
525	int i, n;
526
527	n = kvm_getswapinfo(kd, kswap, sizeof kswap / sizeof kswap[0],
528	    SWIF_DEV_PREFIX);
529
530	print_swap_header();
531	for (i = 0; i < n; ++i)
532		print_swap(&kswap[i]);
533	print_swap_total();
534}
535
536static void
537swapmode_sysctl(void)
538{
539	struct kvm_swap ksw;
540	struct xswdev xsw;
541	size_t mibsize, size;
542	int mib[16], n;
543
544	print_swap_header();
545	mibsize = sizeof mib / sizeof mib[0];
546	if (sysctlnametomib("vm.swap_info", mib, &mibsize) == -1)
547		err(1, "sysctlnametomib()");
548	for (n = 0; ; ++n) {
549		mib[mibsize] = n;
550		size = sizeof xsw;
551		if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, 0) == -1)
552			break;
553		if (xsw.xsw_version != XSWDEV_VERSION)
554			errx(1, "xswdev version mismatch");
555		if (xsw.xsw_dev == NODEV)
556			snprintf(ksw.ksw_devname, sizeof ksw.ksw_devname,
557			    "<NFSfile>");
558		else
559			snprintf(ksw.ksw_devname, sizeof ksw.ksw_devname,
560			    "/dev/%s", devname(xsw.xsw_dev, S_IFCHR));
561		ksw.ksw_used = xsw.xsw_used;
562		ksw.ksw_total = xsw.xsw_nblks;
563		ksw.ksw_flags = xsw.xsw_flags;
564		print_swap(&ksw);
565	}
566	if (errno != ENOENT)
567		err(1, "sysctl()");
568	print_swap_total();
569}
570
571static void
572swapmode(void)
573{
574	if (kd != NULL)
575		swapmode_kvm();
576	else
577		swapmode_sysctl();
578}
579