297 lines
6.6 KiB
C
297 lines
6.6 KiB
C
/* $NetBSD: main.c,v 1.6 1995/05/06 06:25:07 jtc Exp $ */
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/*-
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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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#ifndef lint
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static 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 /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
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#endif
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static char rcsid[] = "$NetBSD: main.c,v 1.6 1995/05/06 06:25:07 jtc Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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#include <err.h>
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#include <nlist.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include "systat.h"
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#include "extern.h"
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static struct nlist namelist[] = {
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#define X_FIRST 0
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#define X_HZ 0
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{ "_hz" },
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#define X_STATHZ 1
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{ "_stathz" },
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{ "" }
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};
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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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int hz, stathz;
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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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static WINDOW *wload; /* one line window for load average */
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void
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main(argc, argv)
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int argc;
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char **argv;
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{
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char errbuf[80];
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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, "ambiguous request: %s", &argv[0][1]);
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if (p == 0)
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errx(1, "unknown request: %s", &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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error("%s", errbuf);
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exit(1);
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}
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if (kvm_nlist(kd, namelist)) {
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nlisterr(namelist);
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exit(1);
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}
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if (namelist[X_FIRST].n_type == 0)
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errx(1, "couldn't read namelist");
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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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if (initscr() == NULL)
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{
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warnx("couldn't initialize screen");
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exit(0);
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}
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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, 3, 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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NREAD(X_HZ, &hz, LONG);
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NREAD(X_STATHZ, &stathz, LONG);
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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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}
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void
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labels()
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{
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if (curcmd->c_flags & CF_LOADAV) {
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mvaddstr(2, 20,
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"/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
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mvaddstr(3, 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(signo)
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int signo;
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{
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register 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()
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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(signo)
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int signo;
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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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#if __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#if __STDC__
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void
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error(const char *fmt, ...)
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#else
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void
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error(fmt, va_alist)
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char *fmt;
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va_dcl
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#endif
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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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#if __STDC__
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va_start(ap, fmt);
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#else
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va_start(ap);
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#endif
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if (wnd) {
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getyx(stdscr, oy, ox);
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(void) vsprintf(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(namelist)
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struct nlist namelist[];
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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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namelist[i].n_name != NULL && *namelist[i].n_name != '\0'; i++)
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if (namelist[i].n_value == 0)
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mvprintw(2 + ++n, 10, "%s", namelist[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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