1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1980, 1992, 1993
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
33
34#include <sys/param.h>
35#include <sys/time.h>
36#include <sys/sysctl.h>
37#include <sys/queue.h>
38
39#include <err.h>
40#include <limits.h>
41#include <locale.h>
42#include <nlist.h>
43#include <paths.h>
44#include <signal.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48#include <unistd.h>
49
50#include "systat.h"
51#include "extern.h"
52
53static int     dellave;
54
55kvm_t *kd;
56double avenrun[3];
57int     col;
58unsigned int	delay = 5000000;	/* in microseconds */
59int     verbose = 1;                    /* to report kvm read errs */
60static struct	clockinfo clkinfo;
61double	hertz;
62char    c;
63char    *namp;
64char    hostname[MAXHOSTNAMELEN];
65WINDOW  *wnd;
66int     CMDLINE;
67int     use_kvm = 1;
68
69static	WINDOW *wload;			/* one line window for load average */
70
71struct cmdentry {
72	SLIST_ENTRY(cmdentry) link;
73	char		*cmd;		/* Command name	*/
74	char		*argv;		/* Arguments vector for a command */
75};
76static SLIST_HEAD(, cmdentry) commands;
77
78static void
79parse_cmd_args (int argc, char **argv)
80{
81	int in_command = 0;
82	struct cmdentry *cmd = NULL;
83	double t;
84
85	while (argc) {
86		if (argv[0][0] == '-') {
87			if (in_command)
88					SLIST_INSERT_HEAD(&commands, cmd, link);
89
90			if (memcmp(argv[0], "--", 3) == 0) {
91				in_command = 0; /*-- ends a command explicitly*/
92				argc --, argv ++;
93				continue;
94			}
95			cmd = calloc(1, sizeof(struct cmdentry));
96			if (cmd == NULL)
97				errx(1, "memory allocating failure");
98			cmd->cmd = strdup(&argv[0][1]);
99			if (cmd->cmd == NULL)
100				errx(1, "memory allocating failure");
101			in_command = 1;
102		}
103		else if (!in_command) {
104			t = strtod(argv[0], NULL) * 1000000.0;
105			if (t > 0 && t < (double)UINT_MAX)
106				delay = (unsigned int)t;
107		}
108		else if (cmd != NULL) {
109			cmd->argv = strdup(argv[0]);
110			if (cmd->argv == NULL)
111				errx(1, "memory allocating failure");
112			in_command = 0;
113			SLIST_INSERT_HEAD(&commands, cmd, link);
114		}
115		else
116			errx(1, "invalid arguments list");
117
118		argc--, argv++;
119	}
120	if (in_command && cmd != NULL)
121		SLIST_INSERT_HEAD(&commands, cmd, link);
122
123}
124
125static void
126resize(int signo __unused)
127{
128
129	endwin();
130	refresh();
131	clear();
132
133	CMDLINE = LINES - 1;
134	labels();
135	display();
136	status();
137}
138
139
140int
141main(int argc, char **argv)
142{
143	char errbuf[_POSIX2_LINE_MAX], dummy;
144	size_t	size;
145	struct cmdentry *cmd = NULL;
146	short cf, cb;
147
148	(void) setlocale(LC_ALL, "");
149
150	SLIST_INIT(&commands);
151	argc--, argv++;
152	if (argc > 0) {
153		if (argv[0][0] == '-') {
154			struct cmdtab *p;
155
156			p = lookup(&argv[0][1]);
157			if (p == (struct cmdtab *)-1)
158				errx(1, "%s: ambiguous request", &argv[0][1]);
159			if (p == (struct cmdtab *)0)
160				errx(1, "%s: unknown request", &argv[0][1]);
161			curcmd = p;
162			argc--, argv++;
163		}
164		parse_cmd_args (argc, argv);
165
166	}
167	kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
168	if (kd != NULL) {
169		/*
170		 * Try to actually read something, we may be in a jail, and
171		 * have /dev/null opened as /dev/mem.
172		 */
173		if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 ||
174		    kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) !=
175		    sizeof(dummy)) {
176			kvm_close(kd);
177			kd = NULL;
178		}
179	}
180	if (kd == NULL) {
181		/*
182		 * Maybe we are lacking permissions? Retry, this time with bogus
183		 * devices. We can now use sysctl only.
184		 */
185		use_kvm = 0;
186		kd = kvm_openfiles(_PATH_DEVNULL, _PATH_DEVNULL, _PATH_DEVNULL,
187		    O_RDONLY, errbuf);
188		if (kd == NULL) {
189			error("%s", errbuf);
190			exit(1);
191		}
192	}
193	signal(SIGHUP, die);
194	signal(SIGINT, die);
195	signal(SIGQUIT, die);
196	signal(SIGTERM, die);
197	signal(SIGWINCH, resize);
198
199	/*
200	 * Initialize display.  Load average appears in a one line
201	 * window of its own.  Current command's display appears in
202	 * an overlapping sub-window of stdscr configured by the display
203	 * routines to minimize update work by curses.
204	 */
205	initscr();
206	start_color();
207	use_default_colors();
208	pair_content(0, &cf, &cb);
209	init_pair(1, COLOR_GREEN, cb);
210	init_pair(2, COLOR_MAGENTA, cb);
211	init_pair(3, COLOR_RED, cb);
212	init_pair(4, COLOR_BLUE, cb);
213	CMDLINE = LINES - 1;
214	wnd = (*curcmd->c_open)();
215	if (wnd == NULL) {
216		warnx("couldn't initialize display");
217		die(0);
218	}
219	wload = newwin(1, 0, 1, 20);
220	if (wload == NULL) {
221		warnx("couldn't set up load average window");
222		die(0);
223	}
224	gethostname(hostname, sizeof (hostname));
225	size = sizeof(clkinfo);
226	if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0)
227	    || size != sizeof(clkinfo)) {
228		error("kern.clockrate");
229		die(0);
230	}
231	hertz = clkinfo.stathz;
232	(*curcmd->c_init)();
233	curcmd->c_flags |= CF_INIT;
234	labels();
235
236	if (curcmd->c_cmd != NULL)
237		SLIST_FOREACH (cmd, &commands, link)
238			if (!curcmd->c_cmd(cmd->cmd, cmd->argv))
239				warnx("command is not understood");
240
241	dellave = 0.0;
242	display();
243	noecho();
244	crmode();
245	keyboard();
246	/*NOTREACHED*/
247
248	return EXIT_SUCCESS;
249}
250
251void
252labels(void)
253{
254	if (curcmd->c_flags & CF_LOADAV) {
255		mvaddstr(0, 20,
256		    "/0   /1   /2   /3   /4   /5   /6   /7   /8   /9   /10");
257		mvaddstr(1, 5, "Load Average");
258	}
259	if (curcmd->c_flags & CF_ZFSARC) {
260		mvaddstr(0, 20,
261		    "   Total     MFU     MRU    Anon     Hdr   L2Hdr   Other");
262		mvaddstr(1, 5, "ZFS ARC     ");
263	}
264	(*curcmd->c_label)();
265#ifdef notdef
266	mvprintw(21, 25, "CPU usage on %s", hostname);
267#endif
268	refresh();
269}
270
271void
272display(void)
273{
274	uint64_t arc_stat;
275	unsigned int ui;
276	int i, j;
277
278	/* Get the load average over the last minute. */
279	(void) getloadavg(avenrun, nitems(avenrun));
280	(*curcmd->c_fetch)();
281	if (curcmd->c_flags & CF_LOADAV) {
282		j = 5.0*avenrun[0] + 0.5;
283		dellave -= avenrun[0];
284		if (dellave >= 0.0)
285			c = '<';
286		else {
287			c = '>';
288			dellave = -dellave;
289		}
290		if (dellave < 0.1)
291			c = '|';
292		dellave = avenrun[0];
293		wmove(wload, 0, 0); wclrtoeol(wload);
294		for (i = MIN(j, 50); i > 0; i--)
295			waddch(wload, c);
296		if (j > 50)
297			wprintw(wload, " %4.1f", avenrun[0]);
298	}
299	if (curcmd->c_flags & CF_ZFSARC) {
300	    uint64_t arc[7] = {};
301	    size_t size = sizeof(arc[0]);
302	    if (sysctlbyname("kstat.zfs.misc.arcstats.size",
303		&arc[0], &size, NULL, 0) == 0 ) {
304		    GETSYSCTL("vfs.zfs.mfu_size", arc[1]);
305		    GETSYSCTL("vfs.zfs.mru_size", arc[2]);
306		    GETSYSCTL("vfs.zfs.anon_size", arc[3]);
307		    GETSYSCTL("kstat.zfs.misc.arcstats.hdr_size", arc[4]);
308		    GETSYSCTL("kstat.zfs.misc.arcstats.l2_hdr_size", arc[5]);
309		    GETSYSCTL("kstat.zfs.misc.arcstats.bonus_size", arc[6]);
310		    GETSYSCTL("kstat.zfs.misc.arcstats.dnode_size", arc_stat);
311		    arc[6] += arc_stat;
312		    GETSYSCTL("kstat.zfs.misc.arcstats.dbuf_size", arc_stat);
313		    arc[6] += arc_stat;
314		    wmove(wload, 0, 0); wclrtoeol(wload);
315		    for (ui = 0 ; ui < nitems(arc); ui++)
316			sysputuint64(wload, 0, ui*8+2, 6, arc[ui], 0);
317	    }
318	}
319	(*curcmd->c_refresh)();
320	if (curcmd->c_flags & (CF_LOADAV |CF_ZFSARC))
321		wrefresh(wload);
322	wrefresh(wnd);
323	move(CMDLINE, col);
324	refresh();
325}
326
327void
328load(void)
329{
330
331	(void) getloadavg(avenrun, nitems(avenrun));
332	mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
333	    avenrun[0], avenrun[1], avenrun[2]);
334	clrtoeol();
335}
336
337void
338die(int signo __unused)
339{
340	move(CMDLINE, 0);
341	clrtoeol();
342	refresh();
343	endwin();
344	exit(0);
345}
346
347#include <stdarg.h>
348
349void
350error(const char *fmt, ...)
351{
352	va_list ap;
353	char buf[255];
354	int oy, ox;
355
356	va_start(ap, fmt);
357	if (wnd) {
358		getyx(stdscr, oy, ox);
359		(void) vsnprintf(buf, sizeof(buf), fmt, ap);
360		clrtoeol();
361		standout();
362		mvaddstr(CMDLINE, 0, buf);
363		standend();
364		move(oy, ox);
365		refresh();
366	} else {
367		(void) vfprintf(stderr, fmt, ap);
368		fprintf(stderr, "\n");
369	}
370	va_end(ap);
371}
372
373void
374nlisterr(struct nlist n_list[])
375{
376	int i, n;
377
378	n = 0;
379	clear();
380	mvprintw(2, 10, "systat: nlist: can't find following symbols:");
381	for (i = 0;
382	    n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++)
383		if (n_list[i].n_value == 0)
384			mvprintw(2 + ++n, 10, "%s", n_list[i].n_name);
385	move(CMDLINE, 0);
386	clrtoeol();
387	refresh();
388	endwin();
389	exit(1);
390}
391