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
33 * @(#) Copyright (c) 1980, 1992, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)main.c 8.1 (Berkeley) 6/6/93
35 * $FreeBSD: src/usr.bin/systat/main.c,v 1.11.2.1 2001/06/06 20:26:01 tmm Exp $
36 * $DragonFly: src/usr.bin/systat/main.c,v 1.7 2008/11/10 04:59:45 swildner Exp $
40 #include <sys/param.h>
54 static struct nlist namelist[] = {
59 { .n_name = "_stathz" },
69 int verbose = 1; /* to report kvm read errs */
74 char hostname[MAXHOSTNAMELEN];
78 static WINDOW *wload; /* one line window for load average */
81 main(int argc, char **argv)
83 char errbuf[_POSIX2_LINE_MAX];
85 (void) setlocale(LC_TIME, "");
89 if (argv[0][0] == '-') {
92 p = lookup(&argv[0][1]);
93 if (p == (struct cmdtab *)-1)
94 errx(1, "%s: ambiguous request", &argv[0][1]);
96 errx(1, "%s: unknown request", &argv[0][1]);
99 naptime = strtod(argv[0], NULL);
105 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
111 signal(SIGQUIT, die);
112 signal(SIGTERM, die);
115 * Initialize display. Load average appears in a one line
116 * window of its own. Current command's display appears in
117 * an overlapping sub-window of stdscr configured by the display
118 * routines to minimize update work by curses.
122 wnd = (*curcmd->c_open)();
124 warnx("couldn't initialize display");
127 wload = newwin(1, 0, 3, 20);
129 warnx("couldn't set up load average window");
132 if (kvm_nlist(kd, namelist)) {
136 if (namelist[X_FIRST].n_type == 0)
137 errx(1, "couldn't read namelist");
138 gethostname(hostname, sizeof (hostname));
139 NREAD(X_HZ, &hz, sizeof(hz));
140 NREAD(X_STATHZ, &stathz, sizeof(stathz));
141 hertz = stathz ? stathz : hz;
143 curcmd->c_flags |= CF_INIT;
148 signal(SIGALRM, display);
161 if (curcmd->c_flags & CF_LOADAV) {
163 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
164 mvaddstr(3, 5, "Load Average");
166 (*curcmd->c_label)();
168 mvprintw(21, 25, "CPU usage on %s", hostname);
174 display(int signo __unused)
177 struct itimerval ctv;
179 /* Get the load average over the last minute. */
180 (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0]));
181 (*curcmd->c_fetch)();
182 if (curcmd->c_flags & CF_LOADAV) {
183 j = 5.0*avenrun[0] + 0.5;
184 dellave = avenrun[0];
186 wmove(wload, 0, 0); wclrtoeol(wload);
187 for (i = (j > 50) ? 50 : j; i > 0; i--)
190 wprintw(wload, " %4.1f", avenrun[0]);
192 (*curcmd->c_refresh)();
193 if (curcmd->c_flags & CF_LOADAV)
198 ctv.it_interval.tv_sec = 0;
199 ctv.it_interval.tv_usec = 0;
200 ctv.it_value.tv_sec = (int)naptime;
201 ctv.it_value.tv_usec = (naptime - (double)(int)naptime) * 1000000.0;
202 setitimer(ITIMER_REAL, &ctv, NULL);
209 (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0]));
210 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
211 avenrun[0], avenrun[1], avenrun[2]);
216 die(int signo __unused)
228 error(const char *fmt, ...)
236 getyx(stdscr, oy, ox);
237 (void) vsnprintf(buf, sizeof(buf), fmt, ap);
240 mvaddstr(CMDLINE, 0, buf);
245 (void) vfprintf(stderr, fmt, ap);
246 fprintf(stderr, "\n");
252 nlisterr(struct nlist *n_list)
258 mvprintw(2, 10, "systat: nlist: can't find following symbols:");
260 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++)
261 if (n_list[i].n_value == 0)
262 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name);