1/*-
2 * Copyright (c) 1980, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35
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36__FBSDID("$FreeBSD: head/usr.bin/systat/main.c 126775 2004-03-09 11:57:28Z dwmalone $");
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| 36__FBSDID("$FreeBSD: head/usr.bin/systat/main.c 158160 2006-04-30 04:26:46Z bde $"); |
37
38#ifdef lint
39static const char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
40#endif
41
42#ifndef lint
43static const char copyright[] =
44"@(#) Copyright (c) 1980, 1992, 1993\n\
45 The Regents of the University of California. All rights reserved.\n";
46#endif
47
48#include <sys/param.h>
49#include <sys/time.h>
50#include <sys/sysctl.h>
51
52#include <err.h>
53#include <limits.h>
54#include <locale.h>
55#include <nlist.h>
56#include <paths.h>
57#include <signal.h>
58#include <stdio.h>
59#include <stdlib.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;
71int naptime = 5;
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
84int
85main(int argc, char **argv)
86{
87 char errbuf[_POSIX2_LINE_MAX], dummy;
88 size_t size;
89
90 (void) setlocale(LC_TIME, "");
91
92 argc--, argv++;
93 while (argc > 0) {
94 if (argv[0][0] == '-') {
95 struct cmdtab *p;
96
97 p = lookup(&argv[0][1]);
98 if (p == (struct cmdtab *)-1)
99 errx(1, "%s: ambiguous request", &argv[0][1]);
100 if (p == (struct cmdtab *)0)
101 errx(1, "%s: unknown request", &argv[0][1]);
102 curcmd = p;
103 } else {
104 naptime = atoi(argv[0]);
105 if (naptime <= 0)
106 naptime = 5;
107 }
108 argc--, argv++;
109 }
110 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
111 if (kd != NULL) {
112 /*
113 * Try to actually read something, we may be in a jail, and
114 * have /dev/null opened as /dev/mem.
115 */
116 if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 ||
117 kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) !=
118 sizeof(dummy)) {
119 kvm_close(kd);
120 kd = NULL;
121 }
122 }
123 if (kd == NULL) {
124 /*
125 * Maybe we are lacking permissions? Retry, this time with bogus
126 * devices. We can now use sysctl only.
127 */
128 use_kvm = 0;
129 kd = kvm_openfiles("/dev/null", "/dev/null", "/dev/null",
130 O_RDONLY, errbuf);
131 if (kd == NULL) {
132 error("%s", errbuf);
133 exit(1);
134 }
135 }
136 signal(SIGINT, die);
137 signal(SIGQUIT, die);
138 signal(SIGTERM, die);
139
140 /*
141 * Initialize display. Load average appears in a one line
142 * window of its own. Current command's display appears in
143 * an overlapping sub-window of stdscr configured by the display
144 * routines to minimize update work by curses.
145 */
146 initscr();
147 CMDLINE = LINES - 1;
148 wnd = (*curcmd->c_open)();
149 if (wnd == NULL) {
150 warnx("couldn't initialize display");
151 die(0);
152 }
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153 wload = newwin(1, 0, 3, 20);
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| 153 wload = newwin(1, 0, 1, 20); |
154 if (wload == NULL) {
155 warnx("couldn't set up load average window");
156 die(0);
157 }
158 gethostname(hostname, sizeof (hostname));
159 size = sizeof(clkinfo);
160 if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0)
161 || size != sizeof(clkinfo)) {
162 error("kern.clockrate");
163 die(0);
164 }
165 hertz = clkinfo.stathz;
166 (*curcmd->c_init)();
167 curcmd->c_flags |= CF_INIT;
168 labels();
169
170 dellave = 0.0;
171
172 signal(SIGALRM, display);
173 display(0);
174 noecho();
175 crmode();
176 keyboard();
177 /*NOTREACHED*/
178
179 return EXIT_SUCCESS;
180}
181
182void
183labels()
184{
185 if (curcmd->c_flags & CF_LOADAV) {
|
186 mvaddstr(2, 20,
|
| 186 mvaddstr(0, 20, |
187 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
|
188 mvaddstr(3, 5, "Load Average");
|
| 188 mvaddstr(1, 5, "Load Average"); |
189 }
190 (*curcmd->c_label)();
191#ifdef notdef
192 mvprintw(21, 25, "CPU usage on %s", hostname);
193#endif
194 refresh();
195}
196
197void
198display(signo)
199 int signo __unused;
200{
201 int i, j;
202
203 /* Get the load average over the last minute. */
204 (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0]));
205 (*curcmd->c_fetch)();
206 if (curcmd->c_flags & CF_LOADAV) {
207 j = 5.0*avenrun[0] + 0.5;
208 dellave -= avenrun[0];
209 if (dellave >= 0.0)
210 c = '<';
211 else {
212 c = '>';
213 dellave = -dellave;
214 }
215 if (dellave < 0.1)
216 c = '|';
217 dellave = avenrun[0];
218 wmove(wload, 0, 0); wclrtoeol(wload);
219 for (i = (j > 50) ? 50 : j; i > 0; i--)
220 waddch(wload, c);
221 if (j > 50)
222 wprintw(wload, " %4.1f", avenrun[0]);
223 }
224 (*curcmd->c_refresh)();
225 if (curcmd->c_flags & CF_LOADAV)
226 wrefresh(wload);
227 wrefresh(wnd);
228 move(CMDLINE, col);
229 refresh();
230 alarm(naptime);
231}
232
233void
234load()
235{
236
237 (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0]));
238 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
239 avenrun[0], avenrun[1], avenrun[2]);
240 clrtoeol();
241}
242
243void
244die(signo)
245 int signo __unused;
246{
247 move(CMDLINE, 0);
248 clrtoeol();
249 refresh();
250 endwin();
251 exit(0);
252}
253
254#include <stdarg.h>
255
256void
257error(const char *fmt, ...)
258{
259 va_list ap;
260 char buf[255];
261 int oy, ox;
262
263 va_start(ap, fmt);
264 if (wnd) {
265 getyx(stdscr, oy, ox);
266 (void) vsnprintf(buf, sizeof(buf), fmt, ap);
267 clrtoeol();
268 standout();
269 mvaddstr(CMDLINE, 0, buf);
270 standend();
271 move(oy, ox);
272 refresh();
273 } else {
274 (void) vfprintf(stderr, fmt, ap);
275 fprintf(stderr, "\n");
276 }
277 va_end(ap);
278}
279
280void
281nlisterr(n_list)
282 struct nlist n_list[];
283{
284 int i, n;
285
286 n = 0;
287 clear();
288 mvprintw(2, 10, "systat: nlist: can't find following symbols:");
289 for (i = 0;
290 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++)
291 if (n_list[i].n_value == 0)
292 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name);
293 move(CMDLINE, 0);
294 clrtoeol();
295 refresh();
296 endwin();
297 exit(1);
298}
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