33dc549136
1) Avoid shadowing index. 2) Constness. 3) Missing prototype for ifcmd. 4) Missing include of string.h. 5) Avoid shadowing error function. 6) ANSI definition for main.
299 lines
6.9 KiB
C
299 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_TIME, "");
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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(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, 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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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()
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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 __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()
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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 __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(n_list)
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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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