main.c revision 1.22 
1/*	$OpenBSD: main.c,v 1.22 2002/02/16 21:27:54 millert Exp $	*/
2/*	$NetBSD: main.c,v 1.8 1996/05/10 23:16:36 thorpej Exp $	*/
3
4/*-
5 * Copyright (c) 1980, 1992, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
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#ifndef lint
38static char copyright[] =
39"@(#) Copyright (c) 1980, 1992, 1993\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)main.c	8.1 (Berkeley) 6/6/93";
46#endif
47static char rcsid[] = "$OpenBSD: main.c,v 1.22 2002/02/16 21:27:54 millert Exp $";
48#endif /* not lint */
49
50#include <sys/param.h>
51#include <sys/sysctl.h>
52
53#include <err.h>
54#include <nlist.h>
55#include <signal.h>
56#include <ctype.h>
57#include <stdio.h>
58#include <string.h>
59#include <unistd.h>
60#include <stdlib.h>
61#include <limits.h>
62
63#include "systat.h"
64#include "extern.h"
65
66double	dellave;
67
68kvm_t	*kd;
69char	*nlistf = NULL;
70char	*memf = NULL;
71sig_t	sigtstpdfl;
72double	avenrun[3];
73int	col;
74int	naptime = 5;
75int	verbose = 1;		/* to report kvm read errs */
76int	hz, stathz;
77char    c;
78char    *namp;
79char    hostname[MAXHOSTNAMELEN];
80WINDOW  *wnd;
81long	CMDLINE;
82
83WINDOW *wload;			/* one line window for load average */
84
85static void usage(void);
86
87int
88main(argc, argv)
89	int argc;
90	char **argv;
91{
92	int ch;
93	char errbuf[_POSIX2_LINE_MAX];
94
95	while ((ch = getopt(argc, argv, "w:")) != -1)
96		switch(ch) {
97		case 'w':
98			if ((naptime = atoi(optarg)) <= 0)
99				errx(1, "interval <= 0.");
100			break;
101		default:
102			usage();
103		}
104	argc -= optind;
105	argv += optind;
106
107	while (argc > 0) {
108		if (isdigit(argv[0][0])) {
109			naptime = atoi(argv[0]);
110			if (naptime <= 0)
111				naptime = 5;
112		} else {
113			struct cmdtab *p;
114
115			p = lookup(&argv[0][0]);
116			if (p == (struct cmdtab *)-1)
117				errx(1, "ambiguous request: %s", &argv[0][0]);
118			if (p == 0)
119				errx(1, "unknown request: %s", &argv[0][0]);
120			curcmd = p;
121		}
122		argc--;
123		argv++;
124	}
125	kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
126	if (kd == NULL) {
127		error("%s", errbuf);
128		exit(1);
129	}
130
131	signal(SIGINT, sigdie);
132	siginterrupt(SIGINT, 1);
133	signal(SIGQUIT, sigdie);
134	siginterrupt(SIGQUIT, 1);
135	signal(SIGTERM, sigdie);
136	siginterrupt(SIGTERM, 1);
137
138	/*
139	 * Initialize display.  Load average appears in a one line
140	 * window of its own.  Current command's display appears in
141	 * an overlapping sub-window of stdscr configured by the display
142	 * routines to minimize update work by curses.
143	 */
144	if (initscr() == NULL)
145	{
146		warnx("couldn't initialize screen");
147		exit(0);
148	}
149
150	CMDLINE = LINES - 1;
151	wnd = (*curcmd->c_open)();
152	if (wnd == NULL) {
153		warnx("couldn't initialize display");
154		die();
155	}
156	wload = newwin(1, 0, 3, 20);
157	if (wload == NULL) {
158		warnx("couldn't set up load average window");
159		die();
160	}
161	gethostname(hostname, sizeof (hostname));
162	gethz();
163	(*curcmd->c_init)();
164	curcmd->c_flags |= CF_INIT;
165	labels();
166
167	dellave = 0.0;
168
169	signal(SIGALRM, sigdisplay);
170	siginterrupt(SIGALRM, 1);
171	signal(SIGWINCH, sigwinch);
172	siginterrupt(SIGWINCH, 1);
173	gotdisplay = 1;
174	noecho();
175	crmode();
176	keyboard();
177	/*NOTREACHED*/
178}
179
180void
181gethz()
182{
183	struct clockinfo cinf;
184	size_t  size = sizeof(cinf);
185	int	mib[2];
186
187	mib[0] = CTL_KERN;
188	mib[1] = KERN_CLOCKRATE;
189	if (sysctl(mib, 2, &cinf, &size, NULL, 0) == -1)
190		return;
191	stathz = cinf.stathz;
192	hz = cinf.hz;
193}
194
195static void
196usage()
197{
198	fprintf(stderr, "usage: systat [-M core] [-N system] [-w wait]\n");
199	fprintf(stderr,
200	    "              [iostat|mbufs|netstat|pigs|swap|vmstat]\n");
201	exit(1);
202}
203
204
205void
206labels()
207{
208	if (curcmd->c_flags & CF_LOADAV) {
209		mvaddstr(2, 20,
210		    "/0   /1   /2   /3   /4   /5   /6   /7   /8   /9   /10");
211		mvaddstr(3, 5, "Load Average");
212	}
213	(*curcmd->c_label)();
214#ifdef notdef
215	mvprintw(21, 25, "CPU usage on %s", hostname);
216#endif
217	refresh();
218}
219
220void
221sigdisplay(signo)
222	int signo;
223{
224	gotdisplay = 1;
225}
226
227void
228display(void)
229{
230	int i, j;
231
232	/* Get the load average over the last minute. */
233	(void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0]));
234	(*curcmd->c_fetch)();
235	if (curcmd->c_flags & CF_LOADAV) {
236		j = 5.0*avenrun[0] + 0.5;
237		dellave -= avenrun[0];
238		if (dellave >= 0.0)
239			c = '<';
240		else {
241			c = '>';
242			dellave = -dellave;
243		}
244		if (dellave < 0.05)
245			c = '|';
246		dellave = avenrun[0];
247		wmove(wload, 0, 0);
248		wclrtoeol(wload);
249		for (i = (j > 50) ? 50 : j; i > 0; i--)
250			waddch(wload, c);
251		if (j > 50)
252			wprintw(wload, " %4.1f", avenrun[0]);
253	}
254	(*curcmd->c_refresh)();
255	if (curcmd->c_flags & CF_LOADAV)
256		wrefresh(wload);
257	wrefresh(wnd);
258	move(CMDLINE, col);
259	refresh();
260	alarm(naptime);
261}
262
263void
264load()
265{
266
267	(void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0]));
268	mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
269	    avenrun[0], avenrun[1], avenrun[2]);
270	clrtoeol();
271}
272
273volatile sig_atomic_t gotdie;
274volatile sig_atomic_t gotdisplay;
275volatile sig_atomic_t gotwinch;
276
277void
278sigdie(signo)
279	int signo;
280{
281	gotdie = 1;
282}
283
284void
285die()
286{
287	if (wnd) {
288		move(CMDLINE, 0);
289		clrtoeol();
290		refresh();
291		endwin();
292	}
293	exit(0);
294}
295
296void
297sigwinch(signo)
298	int signo;
299{
300	gotwinch = 1;
301}
302
303
304#ifdef __STDC__
305#include <stdarg.h>
306#else
307#include <varargs.h>
308#endif
309
310#ifdef __STDC__
311void
312error(const char *fmt, ...)
313#else
314void
315error(fmt, va_alist)
316	char *fmt;
317	va_dcl
318#endif
319{
320	va_list ap;
321	char buf[255];
322	int oy, ox;
323#ifdef __STDC__
324	va_start(ap, fmt);
325#else
326	va_start(ap);
327#endif
328
329	if (wnd) {
330		getyx(stdscr, oy, ox);
331		(void) vsnprintf(buf, sizeof buf, fmt, ap);
332		clrtoeol();
333		standout();
334		mvaddstr(CMDLINE, 0, buf);
335		standend();
336		move(oy, ox);
337		refresh();
338	} else {
339		(void) vfprintf(stderr, fmt, ap);
340		fprintf(stderr, "\n");
341	}
342	va_end(ap);
343}
344
345void
346nlisterr(namelist)
347	struct nlist namelist[];
348{
349	int i, n;
350
351	n = 0;
352	clear();
353	mvprintw(2, 10, "systat: nlist: can't find following symbols:");
354	for (i = 0;
355	    namelist[i].n_name != NULL && *namelist[i].n_name != '\0'; i++)
356		if (namelist[i].n_value == 0)
357			mvprintw(2 + ++n, 10, "%s", namelist[i].n_name);
358	move(CMDLINE, 0);
359	clrtoeol();
360	refresh();
361	endwin();
362	exit(1);
363}
364