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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#) Copyright (c) 1980, 1992, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)main.c 8.1 (Berkeley) 6/6/93
31 * $FreeBSD: src/usr.bin/systat/main.c,v 1.11.2.1 2001/06/06 20:26:01 tmm Exp $
32 * $DragonFly: src/usr.bin/systat/main.c,v 1.7 2008/11/10 04:59:45 swildner Exp $
36 #include <sys/param.h>
50 static struct nlist namelist[] = {
55 { .n_name = "_stathz" },
65 int verbose = 1; /* to report kvm read errs */
70 char hostname[MAXHOSTNAMELEN];
74 static WINDOW *wload; /* one line window for load average */
77 main(int argc, char **argv)
79 char errbuf[_POSIX2_LINE_MAX];
81 (void) setlocale(LC_TIME, "");
85 if (argv[0][0] == '-') {
88 p = lookup(&argv[0][1]);
89 if (p == (struct cmdtab *)-1)
90 errx(1, "%s: ambiguous request", &argv[0][1]);
92 errx(1, "%s: unknown request", &argv[0][1]);
95 naptime = strtod(argv[0], NULL);
101 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
107 signal(SIGQUIT, die);
108 signal(SIGTERM, die);
111 * Initialize display. Load average appears in a one line
112 * window of its own. Current command's display appears in
113 * an overlapping sub-window of stdscr configured by the display
114 * routines to minimize update work by curses.
118 wnd = (*curcmd->c_open)();
120 warnx("couldn't initialize display");
123 wload = newwin(1, 0, 3, 20);
125 warnx("couldn't set up load average window");
128 if (kvm_nlist(kd, namelist)) {
132 if (namelist[X_FIRST].n_type == 0)
133 errx(1, "couldn't read namelist");
134 gethostname(hostname, sizeof (hostname));
135 NREAD(X_HZ, &hz, sizeof(hz));
136 NREAD(X_STATHZ, &stathz, sizeof(stathz));
137 hertz = stathz ? stathz : hz;
139 curcmd->c_flags |= CF_INIT;
144 signal(SIGALRM, display);
157 if (curcmd->c_flags & CF_LOADAV) {
159 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
160 mvaddstr(3, 5, "Load Average");
162 (*curcmd->c_label)();
164 mvprintw(21, 25, "CPU usage on %s", hostname);
170 display(int signo __unused)
173 struct itimerval ctv;
175 /* Get the load average over the last minute. */
176 (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0]));
177 (*curcmd->c_fetch)();
178 if (curcmd->c_flags & CF_LOADAV) {
179 j = 5.0*avenrun[0] + 0.5;
180 dellave = avenrun[0];
182 wmove(wload, 0, 0); wclrtoeol(wload);
183 for (i = (j > 50) ? 50 : j; i > 0; i--)
186 wprintw(wload, " %4.1f", avenrun[0]);
188 (*curcmd->c_refresh)();
189 if (curcmd->c_flags & CF_LOADAV)
194 ctv.it_interval.tv_sec = 0;
195 ctv.it_interval.tv_usec = 0;
196 ctv.it_value.tv_sec = (int)naptime;
197 ctv.it_value.tv_usec = (naptime - (double)(int)naptime) * 1000000.0;
198 setitimer(ITIMER_REAL, &ctv, NULL);
205 (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0]));
206 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
207 avenrun[0], avenrun[1], avenrun[2]);
212 die(int signo __unused)
224 error(const char *fmt, ...)
232 getyx(stdscr, oy, ox);
233 (void) vsnprintf(buf, sizeof(buf), fmt, ap);
236 mvaddstr(CMDLINE, 0, buf);
241 (void) vfprintf(stderr, fmt, ap);
242 fprintf(stderr, "\n");
248 nlisterr(struct nlist *n_list)
254 mvprintw(2, 10, "systat: nlist: can't find following symbols:");
256 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++)
257 if (n_list[i].n_value == 0)
258 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name);