pstat.c revision 256281 
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: stable/10/usr.sbin/pstat/pstat.c 225847 2011-09-28 18:53:36Z 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	NL_MARKER
81};
82
83static struct {
84	int order;
85	const char *name;
86} namelist[] = {
87	{ NL_CONSTTY, "_constty" },
88	{ NL_MAXFILES, "_maxfiles" },
89	{ NL_NFILES, "_openfiles" },
90	{ NL_TTY_LIST, "_tty_list" },
91	{ NL_MARKER, "" },
92};
93#define NNAMES	(sizeof(namelist) / sizeof(*namelist))
94static struct nlist nl[NNAMES];
95
96static int	humanflag;
97static int	usenumflag;
98static int	totalflag;
99static int	swapflag;
100static char	*nlistf;
101static char	*memf;
102static kvm_t	*kd;
103
104static const char *usagestr;
105
106static void	filemode(void);
107static int	getfiles(struct xfile **, size_t *);
108static void	swapmode(void);
109static void	ttymode(void);
110static void	ttyprt(struct xtty *);
111static void	usage(void);
112
113int
114main(int argc, char *argv[])
115{
116	int ch, quit, ret;
117	int fileflag, ttyflag;
118	unsigned int i;
119	char buf[_POSIX2_LINE_MAX];
120	const char *opts;
121
122	fileflag = swapflag = ttyflag = 0;
123
124	/* We will behave like good old swapinfo if thus invoked */
125	opts = strrchr(argv[0], '/');
126	if (opts)
127		opts++;
128	else
129		opts = argv[0];
130	if (!strcmp(opts, "swapinfo")) {
131		swapflag = 1;
132		opts = "ghkmM:N:";
133		usagestr = "swapinfo [-ghkm] [-M core [-N system]]";
134	} else {
135		opts = "TM:N:fghkmnst";
136		usagestr = "pstat [-Tfghkmnst] [-M core [-N system]]";
137	}
138
139	while ((ch = getopt(argc, argv, opts)) != -1)
140		switch (ch) {
141		case 'f':
142			fileflag = 1;
143			break;
144		case 'g':
145			setenv("BLOCKSIZE", "1G", 1);
146			break;
147		case 'h':
148			humanflag = 1;
149			break;
150		case 'k':
151			setenv("BLOCKSIZE", "1K", 1);
152			break;
153		case 'm':
154			setenv("BLOCKSIZE", "1M", 1);
155			break;
156		case 'M':
157			memf = optarg;
158			break;
159		case 'N':
160			nlistf = optarg;
161			break;
162		case 'n':
163			usenumflag = 1;
164			break;
165		case 's':
166			++swapflag;
167			break;
168		case 'T':
169			totalflag = 1;
170			break;
171		case 't':
172			ttyflag = 1;
173			break;
174		default:
175			usage();
176		}
177	argc -= optind;
178	argv += optind;
179
180	/*
181	 * Initialize symbol names list.
182	 */
183	for (i = 0; i < NNAMES; i++)
184		nl[namelist[i].order].n_name = strdup(namelist[i].name);
185
186	if (memf != NULL) {
187		kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
188		if (kd == NULL)
189			errx(1, "kvm_openfiles: %s", buf);
190		if ((ret = kvm_nlist(kd, nl)) != 0) {
191			if (ret == -1)
192				errx(1, "kvm_nlist: %s", kvm_geterr(kd));
193			quit = 0;
194			for (i = 0; nl[i].n_name[0] != '\0'; ++i)
195				if (nl[i].n_value == 0) {
196					quit = 1;
197					warnx("undefined symbol: %s",
198					    nl[i].n_name);
199				}
200			if (quit)
201				exit(1);
202		}
203	}
204	if (!(fileflag | ttyflag | swapflag | totalflag))
205		usage();
206	if (fileflag || totalflag)
207		filemode();
208	if (ttyflag)
209		ttymode();
210	if (swapflag || totalflag)
211		swapmode();
212	exit (0);
213}
214
215static void
216usage(void)
217{
218	fprintf(stderr, "usage: %s\n", usagestr);
219	exit (1);
220}
221
222static const char fhdr32[] =
223  "   LOC   TYPE   FLG  CNT MSG   DATA        OFFSET\n";
224/* c0000000 ------ RWAI 123 123 c0000000 1000000000000000 */
225
226static const char fhdr64[] =
227  "       LOC       TYPE   FLG  CNT MSG       DATA            OFFSET\n";
228/* c000000000000000 ------ RWAI 123 123 c000000000000000 1000000000000000 */
229
230static const char hdr[] =
231"      LINE   INQ  CAN  LIN  LOW  OUTQ  USE  LOW   COL  SESS  PGID STATE\n";
232
233static void
234ttymode_kvm(void)
235{
236	TAILQ_HEAD(, tty) tl;
237	struct tty *tp, tty;
238	struct xtty xt;
239
240	(void)printf("%s", hdr);
241	bzero(&xt, sizeof xt);
242	xt.xt_size = sizeof xt;
243	if (kvm_read(kd, nl[NL_TTY_LIST].n_value, &tl, sizeof tl) != sizeof tl)
244		errx(1, "kvm_read(): %s", kvm_geterr(kd));
245	tp = TAILQ_FIRST(&tl);
246	while (tp != NULL) {
247		if (kvm_read(kd, (u_long)tp, &tty, sizeof tty) != sizeof tty)
248			errx(1, "kvm_read(): %s", kvm_geterr(kd));
249		xt.xt_insize = tty.t_inq.ti_nblocks * TTYINQ_DATASIZE;
250		xt.xt_incc = tty.t_inq.ti_linestart - tty.t_inq.ti_begin;
251		xt.xt_inlc = tty.t_inq.ti_end - tty.t_inq.ti_linestart;
252		xt.xt_inlow = tty.t_inlow;
253		xt.xt_outsize = tty.t_outq.to_nblocks * TTYOUTQ_DATASIZE;
254		xt.xt_outcc = tty.t_outq.to_end - tty.t_outq.to_begin;
255		xt.xt_outlow = tty.t_outlow;
256		xt.xt_column = tty.t_column;
257		/* xt.xt_pgid = ... */
258		/* xt.xt_sid = ... */
259		xt.xt_flags = tty.t_flags;
260		xt.xt_dev = NODEV;
261		ttyprt(&xt);
262		tp = TAILQ_NEXT(&tty, t_list);
263	}
264}
265
266static void
267ttymode_sysctl(void)
268{
269	struct xtty *xttys;
270	size_t len;
271	unsigned int i, n;
272
273	(void)printf("%s", hdr);
274	if ((xttys = malloc(len = sizeof(*xttys))) == NULL)
275		err(1, "malloc()");
276	while (sysctlbyname("kern.ttys", xttys, &len, 0, 0) == -1) {
277		if (errno != ENOMEM)
278			err(1, "sysctlbyname()");
279		len *= 2;
280		if ((xttys = realloc(xttys, len)) == NULL)
281			err(1, "realloc()");
282	}
283	n = len / sizeof(*xttys);
284	for (i = 0; i < n; i++)
285		ttyprt(&xttys[i]);
286}
287
288static void
289ttymode(void)
290{
291
292	if (kd != NULL)
293		ttymode_kvm();
294	else
295		ttymode_sysctl();
296}
297
298static struct {
299	int flag;
300	char val;
301} ttystates[] = {
302#if 0
303	{ TF_NOPREFIX,		'N' },
304#endif
305	{ TF_INITLOCK,		'I' },
306	{ TF_CALLOUT,		'C' },
307
308	/* Keep these together -> 'Oi' and 'Oo'. */
309	{ TF_OPENED,		'O' },
310	{ TF_OPENED_IN,		'i' },
311	{ TF_OPENED_OUT,	'o' },
312	{ TF_OPENED_CONS,	'c' },
313
314	{ TF_GONE,		'G' },
315	{ TF_OPENCLOSE,		'B' },
316	{ TF_ASYNC,		'Y' },
317	{ TF_LITERAL,		'L' },
318
319	/* Keep these together -> 'Hi' and 'Ho'. */
320	{ TF_HIWAT,		'H' },
321	{ TF_HIWAT_IN,		'i' },
322	{ TF_HIWAT_OUT,		'o' },
323
324	{ TF_STOPPED,		'S' },
325	{ TF_EXCLUDE,		'X' },
326	{ TF_BYPASS,		'l' },
327	{ TF_ZOMBIE,		'Z' },
328	{ TF_HOOK,		's' },
329
330	/* Keep these together -> 'bi' and 'bo'. */
331	{ TF_BUSY,		'b' },
332	{ TF_BUSY_IN,		'i' },
333	{ TF_BUSY_OUT,		'o' },
334
335	{ 0,			'\0'},
336};
337
338static void
339ttyprt(struct xtty *xt)
340{
341	int i, j;
342	char *name;
343
344	if (xt->xt_size != sizeof *xt)
345		errx(1, "struct xtty size mismatch");
346	if (usenumflag || xt->xt_dev == 0 ||
347	   (name = devname(xt->xt_dev, S_IFCHR)) == NULL)
348		printf("%#10jx ", (uintmax_t)xt->xt_dev);
349	else
350		printf("%10s ", name);
351	printf("%5zu %4zu %4zu %4zu %5zu %4zu %4zu %5u %5d %5d ",
352	    xt->xt_insize, xt->xt_incc, xt->xt_inlc,
353	    (xt->xt_insize - xt->xt_inlow), xt->xt_outsize,
354	    xt->xt_outcc, (xt->xt_outsize - xt->xt_outlow),
355	    MIN(xt->xt_column, 99999), xt->xt_sid, xt->xt_pgid);
356	for (i = j = 0; ttystates[i].flag; i++)
357		if (xt->xt_flags & ttystates[i].flag) {
358			putchar(ttystates[i].val);
359			j++;
360		}
361	if (j == 0)
362		putchar('-');
363	putchar('\n');
364}
365
366static void
367filemode(void)
368{
369	struct xfile *fp, *buf;
370	char flagbuf[16], *fbp;
371	int maxf, openf;
372	size_t len;
373	static char const * const dtypes[] = { "???", "inode", "socket",
374	    "pipe", "fifo", "kqueue", "crypto" };
375	int i;
376	int wid;
377
378	if (kd != NULL) {
379		if (kvm_read(kd, nl[NL_MAXFILES].n_value,
380			&maxf, sizeof maxf) != sizeof maxf ||
381		    kvm_read(kd, nl[NL_NFILES].n_value,
382			&openf, sizeof openf) != sizeof openf)
383			errx(1, "kvm_read(): %s", kvm_geterr(kd));
384	} else {
385		len = sizeof(int);
386		if (sysctlbyname("kern.maxfiles", &maxf, &len, 0, 0) == -1 ||
387		    sysctlbyname("kern.openfiles", &openf, &len, 0, 0) == -1)
388			err(1, "sysctlbyname()");
389	}
390
391	if (totalflag) {
392		(void)printf("%3d/%3d files\n", openf, maxf);
393		return;
394	}
395	if (getfiles(&buf, &len) == -1)
396		return;
397	openf = len / sizeof *fp;
398
399	(void)printf("%d/%d open files\n", openf, maxf);
400	printf(sizeof(uintptr_t) == 4 ? fhdr32 : fhdr64);
401	wid = (int)sizeof(uintptr_t) * 2;
402	for (fp = (struct xfile *)buf, i = 0; i < openf; ++fp, ++i) {
403		if ((size_t)fp->xf_type >= sizeof(dtypes) / sizeof(dtypes[0]))
404			continue;
405		(void)printf("%*jx", wid, (uintmax_t)(uintptr_t)fp->xf_file);
406		(void)printf(" %-6.6s", dtypes[fp->xf_type]);
407		fbp = flagbuf;
408		if (fp->xf_flag & FREAD)
409			*fbp++ = 'R';
410		if (fp->xf_flag & FWRITE)
411			*fbp++ = 'W';
412		if (fp->xf_flag & FAPPEND)
413			*fbp++ = 'A';
414		if (fp->xf_flag & FASYNC)
415			*fbp++ = 'I';
416		*fbp = '\0';
417		(void)printf(" %4s %3d", flagbuf, fp->xf_count);
418		(void)printf(" %3d", fp->xf_msgcount);
419		(void)printf(" %*jx", wid, (uintmax_t)(uintptr_t)fp->xf_data);
420		(void)printf(" %*jx\n", (int)sizeof(fp->xf_offset) * 2,
421		    (uintmax_t)fp->xf_offset);
422	}
423	free(buf);
424}
425
426static int
427getfiles(struct xfile **abuf, size_t *alen)
428{
429	struct xfile *buf;
430	size_t len;
431	int mib[2];
432
433	/*
434	 * XXX
435	 * Add emulation of KINFO_FILE here.
436	 */
437	if (kd != NULL)
438		errx(1, "files on dead kernel, not implemented");
439
440	mib[0] = CTL_KERN;
441	mib[1] = KERN_FILE;
442	if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1) {
443		warn("sysctl: KERN_FILE");
444		return (-1);
445	}
446	if ((buf = malloc(len)) == NULL)
447		errx(1, "malloc");
448	if (sysctl(mib, 2, buf, &len, NULL, 0) == -1) {
449		warn("sysctl: KERN_FILE");
450		return (-1);
451	}
452	*abuf = buf;
453	*alen = len;
454	return (0);
455}
456
457/*
458 * swapmode is based on a program called swapinfo written
459 * by Kevin Lahey <kml@rokkaku.atl.ga.us>.
460 */
461
462#define CONVERT(v)	((int64_t)(v) * pagesize / blocksize)
463#define CONVERT_BLOCKS(v)	((int64_t)(v) * pagesize)
464static struct kvm_swap swtot;
465static int nswdev;
466
467static void
468print_swap_header(void)
469{
470	int hlen;
471	long blocksize;
472	const char *header;
473
474	header = getbsize(&hlen, &blocksize);
475	if (totalflag == 0)
476		(void)printf("%-15s %*s %8s %8s %8s\n",
477		    "Device", hlen, header,
478		    "Used", "Avail", "Capacity");
479}
480
481static void
482print_swap_line(const char *swdevname, intmax_t nblks, intmax_t bused,
483    intmax_t bavail, float bpercent)
484{
485	char usedbuf[5];
486	char availbuf[5];
487	int hlen, pagesize;
488	long blocksize;
489
490	pagesize = getpagesize();
491	getbsize(&hlen, &blocksize);
492
493	printf("%-15s %*jd ", swdevname, hlen, CONVERT(nblks));
494	if (humanflag) {
495		humanize_number(usedbuf, sizeof(usedbuf),
496		    CONVERT_BLOCKS(bused), "",
497		    HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
498		humanize_number(availbuf, sizeof(availbuf),
499		    CONVERT_BLOCKS(bavail), "",
500		    HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
501		printf("%8s %8s %5.0f%%\n", usedbuf, availbuf, bpercent);
502	} else {
503		printf("%8jd %8jd %5.0f%%\n", (intmax_t)CONVERT(bused),
504		    (intmax_t)CONVERT(bavail), bpercent);
505	}
506}
507
508static void
509print_swap(struct kvm_swap *ksw)
510{
511
512	swtot.ksw_total += ksw->ksw_total;
513	swtot.ksw_used += ksw->ksw_used;
514	++nswdev;
515	if (totalflag == 0)
516		print_swap_line(ksw->ksw_devname, ksw->ksw_total,
517		    ksw->ksw_used, ksw->ksw_total - ksw->ksw_used,
518		    (ksw->ksw_used * 100.0) / ksw->ksw_total);
519}
520
521static void
522print_swap_total(void)
523{
524	int hlen, pagesize;
525	long blocksize;
526
527	pagesize = getpagesize();
528	getbsize(&hlen, &blocksize);
529	if (totalflag) {
530		blocksize = 1024 * 1024;
531		(void)printf("%jdM/%jdM swap space\n",
532		    CONVERT(swtot.ksw_used), CONVERT(swtot.ksw_total));
533	} else if (nswdev > 1) {
534		print_swap_line("Total", swtot.ksw_total, swtot.ksw_used,
535		    swtot.ksw_total - swtot.ksw_used,
536		    (swtot.ksw_used * 100.0) / swtot.ksw_total);
537	}
538}
539
540static void
541swapmode_kvm(void)
542{
543	struct kvm_swap kswap[16];
544	int i, n;
545
546	n = kvm_getswapinfo(kd, kswap, sizeof kswap / sizeof kswap[0],
547	    SWIF_DEV_PREFIX);
548
549	print_swap_header();
550	for (i = 0; i < n; ++i)
551		print_swap(&kswap[i]);
552	print_swap_total();
553}
554
555static void
556swapmode_sysctl(void)
557{
558	struct kvm_swap ksw;
559	struct xswdev xsw;
560	size_t mibsize, size;
561	int mib[16], n;
562
563	print_swap_header();
564	mibsize = sizeof mib / sizeof mib[0];
565	if (sysctlnametomib("vm.swap_info", mib, &mibsize) == -1)
566		err(1, "sysctlnametomib()");
567	for (n = 0; ; ++n) {
568		mib[mibsize] = n;
569		size = sizeof xsw;
570		if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, 0) == -1)
571			break;
572		if (xsw.xsw_version != XSWDEV_VERSION)
573			errx(1, "xswdev version mismatch");
574		if (xsw.xsw_dev == NODEV)
575			snprintf(ksw.ksw_devname, sizeof ksw.ksw_devname,
576			    "<NFSfile>");
577		else
578			snprintf(ksw.ksw_devname, sizeof ksw.ksw_devname,
579			    "/dev/%s", devname(xsw.xsw_dev, S_IFCHR));
580		ksw.ksw_used = xsw.xsw_used;
581		ksw.ksw_total = xsw.xsw_nblks;
582		ksw.ksw_flags = xsw.xsw_flags;
583		print_swap(&ksw);
584	}
585	if (errno != ENOENT)
586		err(1, "sysctl()");
587	print_swap_total();
588}
589
590static void
591swapmode(void)
592{
593	if (kd != NULL)
594		swapmode_kvm();
595	else
596		swapmode_sysctl();
597}
598