2 * Copyright (c) 1980, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
34 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 static const char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
43 static const char copyright[] =
44 "@(#) Copyright (c) 1980, 1992, 1993\n\
45 The Regents of the University of California. All rights reserved.\n";
48 #include <sys/param.h>
50 #include <sys/sysctl.h>
71 unsigned int delay = 5000000; /* in microseconds */
72 int verbose = 1; /* to report kvm read errs */
73 struct clockinfo clkinfo;
77 char hostname[MAXHOSTNAMELEN];
82 static WINDOW *wload; /* one line window for load average */
85 main(int argc, char **argv)
87 char errbuf[_POSIX2_LINE_MAX], dummy;
91 (void) setlocale(LC_ALL, "");
95 if (argv[0][0] == '-') {
98 p = lookup(&argv[0][1]);
99 if (p == (struct cmdtab *)-1)
100 errx(1, "%s: ambiguous request", &argv[0][1]);
101 if (p == (struct cmdtab *)0)
102 errx(1, "%s: unknown request", &argv[0][1]);
105 t = strtod(argv[0], NULL) * 1000000.0;
106 if (t > 0 && t < (double)UINT_MAX)
107 delay = (unsigned int)t;
111 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
114 * Try to actually read something, we may be in a jail, and
115 * have /dev/null opened as /dev/mem.
117 if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 ||
118 kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) !=
126 * Maybe we are lacking permissions? Retry, this time with bogus
127 * devices. We can now use sysctl only.
130 kd = kvm_openfiles("/dev/null", "/dev/null", "/dev/null",
139 signal(SIGQUIT, die);
140 signal(SIGTERM, die);
143 * Initialize display. Load average appears in a one line
144 * window of its own. Current command's display appears in
145 * an overlapping sub-window of stdscr configured by the display
146 * routines to minimize update work by curses.
150 wnd = (*curcmd->c_open)();
152 warnx("couldn't initialize display");
155 wload = newwin(1, 0, 1, 20);
157 warnx("couldn't set up load average window");
160 gethostname(hostname, sizeof (hostname));
161 size = sizeof(clkinfo);
162 if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0)
163 || size != sizeof(clkinfo)) {
164 error("kern.clockrate");
167 hertz = clkinfo.stathz;
169 curcmd->c_flags |= CF_INIT;
186 if (curcmd->c_flags & CF_LOADAV) {
188 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
189 mvaddstr(1, 5, "Load Average");
191 (*curcmd->c_label)();
193 mvprintw(21, 25, "CPU usage on %s", hostname);
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];
217 dellave = avenrun[0];
218 wmove(wload, 0, 0); wclrtoeol(wload);
219 for (i = (j > 50) ? 50 : j; i > 0; i--)
222 wprintw(wload, " %4.1f", avenrun[0]);
224 (*curcmd->c_refresh)();
225 if (curcmd->c_flags & CF_LOADAV)
236 (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0]));
237 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
238 avenrun[0], avenrun[1], avenrun[2]);
243 die(int signo __unused)
255 error(const char *fmt, ...)
263 getyx(stdscr, oy, ox);
264 (void) vsnprintf(buf, sizeof(buf), fmt, ap);
267 mvaddstr(CMDLINE, 0, buf);
272 (void) vfprintf(stderr, fmt, ap);
273 fprintf(stderr, "\n");
279 nlisterr(struct nlist n_list[])
285 mvprintw(2, 10, "systat: nlist: can't find following symbols:");
287 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++)
288 if (n_list[i].n_value == 0)
289 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name);