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#include <sys/cdefs.h>
33
34__FBSDID("$FreeBSD$");
35
36#ifdef lint
37static const char sccsid[] = "@(#)main.c	8.1 (Berkeley) 6/6/93";
38#endif
39
40#ifndef lint
41static const char copyright[] =
42"@(#) Copyright (c) 1980, 1992, 1993\n\
43	The Regents of the University of California.  All rights reserved.\n";
44#endif
45
46#include <sys/param.h>
47#include <sys/time.h>
48#include <sys/sysctl.h>
49#include <sys/queue.h>
50
51#include <err.h>
52#include <limits.h>
53#include <locale.h>
54#include <nlist.h>
55#include <paths.h>
56#include <signal.h>
57#include <stdio.h>
58#include <stdlib.h>
59#include <string.h>
60#include <unistd.h>
61
62#include "systat.h"
63#include "extern.h"
64
65static int     dellave;
66
67kvm_t *kd;
68sig_t	sigtstpdfl;
69double avenrun[3];
70int     col;
71unsigned int	delay = 5000000;	/* in microseconds */
72int     verbose = 1;                    /* to report kvm read errs */
73struct	clockinfo clkinfo;
74double	hertz;
75char    c;
76char    *namp;
77char    hostname[MAXHOSTNAMELEN];
78WINDOW  *wnd;
79int     CMDLINE;
80int     use_kvm = 1;
81
82static	WINDOW *wload;			/* one line window for load average */
83
84struct cmdentry {
85	SLIST_ENTRY(cmdentry) link;
86	char		*cmd;		/* Command name	*/
87	char		*argv;		/* Arguments vector for a command */
88};
89SLIST_HEAD(, cmdentry) commands;
90
91static void
92parse_cmd_args (int argc, char **argv)
93{
94	int in_command = 0;
95	struct cmdentry *cmd = NULL;
96	double t;
97
98	while (argc) {
99		if (argv[0][0] == '-') {
100			if (in_command)
101					SLIST_INSERT_HEAD(&commands, cmd, link);
102
103			if (memcmp(argv[0], "--", 3) == 0) {
104				in_command = 0; /*-- ends a command explicitly*/
105				argc --, argv ++;
106				continue;
107			}
108			cmd = calloc(1, sizeof(struct cmdentry));
109			if (cmd == NULL)
110				errx(1, "memory allocating failure");
111			cmd->cmd = strdup(&argv[0][1]);
112			if (cmd->cmd == NULL)
113				errx(1, "memory allocating failure");
114			in_command = 1;
115		}
116		else if (!in_command) {
117			t = strtod(argv[0], NULL) * 1000000.0;
118			if (t > 0 && t < (double)UINT_MAX)
119				delay = (unsigned int)t;
120		}
121		else if (cmd != NULL) {
122			cmd->argv = strdup(argv[0]);
123			if (cmd->argv == NULL)
124				errx(1, "memory allocating failure");
125			in_command = 0;
126			SLIST_INSERT_HEAD(&commands, cmd, link);
127		}
128		else
129			errx(1, "invalid arguments list");
130
131		argc--, argv++;
132	}
133	if (in_command && cmd != NULL)
134		SLIST_INSERT_HEAD(&commands, cmd, link);
135
136}
137
138int
139main(int argc, char **argv)
140{
141	char errbuf[_POSIX2_LINE_MAX], dummy;
142	size_t	size;
143	struct cmdentry *cmd = NULL;
144
145	(void) setlocale(LC_ALL, "");
146
147	SLIST_INIT(&commands);
148	argc--, argv++;
149	if (argc > 0) {
150		if (argv[0][0] == '-') {
151			struct cmdtab *p;
152
153			p = lookup(&argv[0][1]);
154			if (p == (struct cmdtab *)-1)
155				errx(1, "%s: ambiguous request", &argv[0][1]);
156			if (p == (struct cmdtab *)0)
157				errx(1, "%s: unknown request", &argv[0][1]);
158			curcmd = p;
159			argc--, argv++;
160		}
161		parse_cmd_args (argc, argv);
162
163	}
164	kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
165	if (kd != NULL) {
166		/*
167		 * Try to actually read something, we may be in a jail, and
168		 * have /dev/null opened as /dev/mem.
169		 */
170		if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 ||
171		    kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) !=
172		    sizeof(dummy)) {
173			kvm_close(kd);
174			kd = NULL;
175		}
176	}
177	if (kd == NULL) {
178		/*
179		 * Maybe we are lacking permissions? Retry, this time with bogus
180		 * devices. We can now use sysctl only.
181		 */
182		use_kvm = 0;
183		kd = kvm_openfiles(_PATH_DEVNULL, _PATH_DEVNULL, _PATH_DEVNULL,
184		    O_RDONLY, errbuf);
185		if (kd == NULL) {
186			error("%s", errbuf);
187			exit(1);
188		}
189	}
190	signal(SIGHUP, die);
191	signal(SIGINT, die);
192	signal(SIGQUIT, die);
193	signal(SIGTERM, die);
194
195	/*
196	 * Initialize display.  Load average appears in a one line
197	 * window of its own.  Current command's display appears in
198	 * an overlapping sub-window of stdscr configured by the display
199	 * routines to minimize update work by curses.
200	 */
201	initscr();
202	CMDLINE = LINES - 1;
203	wnd = (*curcmd->c_open)();
204	if (wnd == NULL) {
205		warnx("couldn't initialize display");
206		die(0);
207	}
208	wload = newwin(1, 0, 1, 20);
209	if (wload == NULL) {
210		warnx("couldn't set up load average window");
211		die(0);
212	}
213	gethostname(hostname, sizeof (hostname));
214	size = sizeof(clkinfo);
215	if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0)
216	    || size != sizeof(clkinfo)) {
217		error("kern.clockrate");
218		die(0);
219	}
220	hertz = clkinfo.stathz;
221	(*curcmd->c_init)();
222	curcmd->c_flags |= CF_INIT;
223	labels();
224
225	if (curcmd->c_cmd != NULL)
226		SLIST_FOREACH (cmd, &commands, link)
227			if (!curcmd->c_cmd(cmd->cmd, cmd->argv))
228				warnx("command is not understood");
229
230	dellave = 0.0;
231	display();
232	noecho();
233	crmode();
234	keyboard();
235	/*NOTREACHED*/
236
237	return EXIT_SUCCESS;
238}
239
240void
241labels(void)
242{
243	if (curcmd->c_flags & CF_LOADAV) {
244		mvaddstr(0, 20,
245		    "/0   /1   /2   /3   /4   /5   /6   /7   /8   /9   /10");
246		mvaddstr(1, 5, "Load Average");
247	}
248	if (curcmd->c_flags & CF_ZFSARC) {
249		mvaddstr(0, 20,
250		    "   Total     MFU     MRU    Anon     Hdr   L2Hdr   Other");
251		mvaddstr(1, 5, "ZFS ARC     ");
252	}
253	(*curcmd->c_label)();
254#ifdef notdef
255	mvprintw(21, 25, "CPU usage on %s", hostname);
256#endif
257	refresh();
258}
259
260void
261display(void)
262{
263	uint64_t arc_stat;
264	int i, j;
265
266	/* Get the load average over the last minute. */
267	(void) getloadavg(avenrun, nitems(avenrun));
268	(*curcmd->c_fetch)();
269	if (curcmd->c_flags & CF_LOADAV) {
270		j = 5.0*avenrun[0] + 0.5;
271		dellave -= avenrun[0];
272		if (dellave >= 0.0)
273			c = '<';
274		else {
275			c = '>';
276			dellave = -dellave;
277		}
278		if (dellave < 0.1)
279			c = '|';
280		dellave = avenrun[0];
281		wmove(wload, 0, 0); wclrtoeol(wload);
282		for (i = MIN(j, 50); i > 0; i--)
283			waddch(wload, c);
284		if (j > 50)
285			wprintw(wload, " %4.1f", avenrun[0]);
286	}
287	if (curcmd->c_flags & CF_ZFSARC) {
288	    uint64_t arc[7] = {};
289	    size_t size = sizeof(arc[0]);
290	    if (sysctlbyname("kstat.zfs.misc.arcstats.size",
291		&arc[0], &size, NULL, 0) == 0 ) {
292		    GETSYSCTL("vfs.zfs.mfu_size", arc[1]);
293		    GETSYSCTL("vfs.zfs.mru_size", arc[2]);
294		    GETSYSCTL("vfs.zfs.anon_size", arc[3]);
295		    GETSYSCTL("kstat.zfs.misc.arcstats.hdr_size", arc[4]);
296		    GETSYSCTL("kstat.zfs.misc.arcstats.l2_hdr_size", arc[5]);
297		    GETSYSCTL("kstat.zfs.misc.arcstats.bonus_size", arc[6]);
298		    GETSYSCTL("kstat.zfs.misc.arcstats.dnode_size", arc_stat);
299		    arc[6] += arc_stat;
300		    GETSYSCTL("kstat.zfs.misc.arcstats.dbuf_size", arc_stat);
301		    arc[6] += arc_stat;
302		    wmove(wload, 0, 0); wclrtoeol(wload);
303		    for (i = 0 ; i < nitems(arc); i++)
304			sysputuint64(wload, 0, i*8+2, 6, arc[i], 0);
305	    }
306	}
307	(*curcmd->c_refresh)();
308	if (curcmd->c_flags & (CF_LOADAV |CF_ZFSARC))
309		wrefresh(wload);
310	wrefresh(wnd);
311	move(CMDLINE, col);
312	refresh();
313}
314
315void
316load(void)
317{
318
319	(void) getloadavg(avenrun, nitems(avenrun));
320	mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
321	    avenrun[0], avenrun[1], avenrun[2]);
322	clrtoeol();
323}
324
325void
326die(int signo __unused)
327{
328	move(CMDLINE, 0);
329	clrtoeol();
330	refresh();
331	endwin();
332	exit(0);
333}
334
335#include <stdarg.h>
336
337void
338error(const char *fmt, ...)
339{
340	va_list ap;
341	char buf[255];
342	int oy, ox;
343
344	va_start(ap, fmt);
345	if (wnd) {
346		getyx(stdscr, oy, ox);
347		(void) vsnprintf(buf, sizeof(buf), fmt, ap);
348		clrtoeol();
349		standout();
350		mvaddstr(CMDLINE, 0, buf);
351		standend();
352		move(oy, ox);
353		refresh();
354	} else {
355		(void) vfprintf(stderr, fmt, ap);
356		fprintf(stderr, "\n");
357	}
358	va_end(ap);
359}
360
361void
362nlisterr(struct nlist n_list[])
363{
364	int i, n;
365
366	n = 0;
367	clear();
368	mvprintw(2, 10, "systat: nlist: can't find following symbols:");
369	for (i = 0;
370	    n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++)
371		if (n_list[i].n_value == 0)
372			mvprintw(2 + ++n, 10, "%s", n_list[i].n_name);
373	move(CMDLINE, 0);
374	clrtoeol();
375	refresh();
376	endwin();
377	exit(1);
378}
379