297 lines
6.9 KiB
C
297 lines
6.9 KiB
C
/*-
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* Copyright (c) 1980, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifdef lint
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static const char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
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#endif
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1992, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <limits.h>
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#include <locale.h>
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#include <nlist.h>
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#include <paths.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "systat.h"
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#include "extern.h"
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static int dellave;
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kvm_t *kd;
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sig_t sigtstpdfl;
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double avenrun[3];
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int col;
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int naptime = 5;
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int verbose = 1; /* to report kvm read errs */
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struct clockinfo clkinfo;
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double hertz;
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char c;
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char *namp;
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char hostname[MAXHOSTNAMELEN];
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WINDOW *wnd;
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int CMDLINE;
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int use_kvm = 1;
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static WINDOW *wload; /* one line window for load average */
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int
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main(int argc, char **argv)
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{
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char errbuf[_POSIX2_LINE_MAX], dummy;
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size_t size;
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(void) setlocale(LC_ALL, "");
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argc--, argv++;
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while (argc > 0) {
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if (argv[0][0] == '-') {
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struct cmdtab *p;
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p = lookup(&argv[0][1]);
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if (p == (struct cmdtab *)-1)
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errx(1, "%s: ambiguous request", &argv[0][1]);
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if (p == (struct cmdtab *)0)
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errx(1, "%s: unknown request", &argv[0][1]);
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curcmd = p;
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} else {
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naptime = atoi(argv[0]);
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if (naptime <= 0)
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naptime = 5;
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}
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argc--, argv++;
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}
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kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
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if (kd != NULL) {
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/*
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* Try to actually read something, we may be in a jail, and
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* have /dev/null opened as /dev/mem.
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*/
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if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 ||
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kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) !=
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sizeof(dummy)) {
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kvm_close(kd);
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kd = NULL;
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}
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}
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if (kd == NULL) {
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/*
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* Maybe we are lacking permissions? Retry, this time with bogus
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* devices. We can now use sysctl only.
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*/
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use_kvm = 0;
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kd = kvm_openfiles("/dev/null", "/dev/null", "/dev/null",
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O_RDONLY, errbuf);
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if (kd == NULL) {
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error("%s", errbuf);
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exit(1);
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}
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}
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signal(SIGHUP, die);
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signal(SIGINT, die);
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signal(SIGQUIT, die);
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signal(SIGTERM, die);
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/*
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* Initialize display. Load average appears in a one line
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* window of its own. Current command's display appears in
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* an overlapping sub-window of stdscr configured by the display
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* routines to minimize update work by curses.
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*/
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initscr();
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CMDLINE = LINES - 1;
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wnd = (*curcmd->c_open)();
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if (wnd == NULL) {
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warnx("couldn't initialize display");
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die(0);
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}
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wload = newwin(1, 0, 1, 20);
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if (wload == NULL) {
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warnx("couldn't set up load average window");
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die(0);
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}
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gethostname(hostname, sizeof (hostname));
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size = sizeof(clkinfo);
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if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0)
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|| size != sizeof(clkinfo)) {
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error("kern.clockrate");
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die(0);
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}
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hertz = clkinfo.stathz;
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(*curcmd->c_init)();
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curcmd->c_flags |= CF_INIT;
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labels();
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dellave = 0.0;
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signal(SIGALRM, display);
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display(0);
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noecho();
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crmode();
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keyboard();
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/*NOTREACHED*/
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return EXIT_SUCCESS;
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}
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void
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labels(void)
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{
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if (curcmd->c_flags & CF_LOADAV) {
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mvaddstr(0, 20,
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"/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
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mvaddstr(1, 5, "Load Average");
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}
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(*curcmd->c_label)();
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#ifdef notdef
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mvprintw(21, 25, "CPU usage on %s", hostname);
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#endif
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refresh();
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}
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void
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display(int signo __unused)
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{
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int i, j;
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/* Get the load average over the last minute. */
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(void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0]));
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(*curcmd->c_fetch)();
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if (curcmd->c_flags & CF_LOADAV) {
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j = 5.0*avenrun[0] + 0.5;
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dellave -= avenrun[0];
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if (dellave >= 0.0)
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c = '<';
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else {
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c = '>';
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dellave = -dellave;
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}
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if (dellave < 0.1)
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c = '|';
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dellave = avenrun[0];
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wmove(wload, 0, 0); wclrtoeol(wload);
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for (i = (j > 50) ? 50 : j; i > 0; i--)
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waddch(wload, c);
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if (j > 50)
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wprintw(wload, " %4.1f", avenrun[0]);
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}
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(*curcmd->c_refresh)();
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if (curcmd->c_flags & CF_LOADAV)
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wrefresh(wload);
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wrefresh(wnd);
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move(CMDLINE, col);
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refresh();
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alarm(naptime);
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}
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void
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load(void)
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{
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(void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0]));
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mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
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avenrun[0], avenrun[1], avenrun[2]);
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clrtoeol();
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}
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void
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die(int signo __unused)
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{
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move(CMDLINE, 0);
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clrtoeol();
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refresh();
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endwin();
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exit(0);
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}
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#include <stdarg.h>
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void
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error(const char *fmt, ...)
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{
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va_list ap;
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char buf[255];
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int oy, ox;
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va_start(ap, fmt);
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if (wnd) {
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getyx(stdscr, oy, ox);
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(void) vsnprintf(buf, sizeof(buf), fmt, ap);
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clrtoeol();
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standout();
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mvaddstr(CMDLINE, 0, buf);
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standend();
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move(oy, ox);
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refresh();
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} else {
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(void) vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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}
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va_end(ap);
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}
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void
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nlisterr(struct nlist n_list[])
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{
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int i, n;
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n = 0;
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clear();
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mvprintw(2, 10, "systat: nlist: can't find following symbols:");
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for (i = 0;
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n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++)
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if (n_list[i].n_value == 0)
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mvprintw(2 + ++n, 10, "%s", n_list[i].n_name);
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move(CMDLINE, 0);
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clrtoeol();
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refresh();
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endwin();
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exit(1);
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}
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