FreeBSD-5.3/usr.bin/systat/main.c
/*-
* Copyright (c) 1980, 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/systat/main.c,v 1.18 2004/03/09 11:57:28 dwmalone Exp $");
#ifdef lint
static const char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
#endif
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1980, 1992, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif
#include <sys/param.h>
#include <sys/time.h>
#include <sys/sysctl.h>
#include <err.h>
#include <limits.h>
#include <locale.h>
#include <nlist.h>
#include <paths.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "systat.h"
#include "extern.h"
static int dellave;
kvm_t *kd;
sig_t sigtstpdfl;
double avenrun[3];
int col;
int naptime = 5;
int verbose = 1; /* to report kvm read errs */
struct clockinfo clkinfo;
double hertz;
char c;
char *namp;
char hostname[MAXHOSTNAMELEN];
WINDOW *wnd;
int CMDLINE;
int use_kvm = 1;
static WINDOW *wload; /* one line window for load average */
int
main(int argc, char **argv)
{
char errbuf[_POSIX2_LINE_MAX], dummy;
size_t size;
(void) setlocale(LC_TIME, "");
argc--, argv++;
while (argc > 0) {
if (argv[0][0] == '-') {
struct cmdtab *p;
p = lookup(&argv[0][1]);
if (p == (struct cmdtab *)-1)
errx(1, "%s: ambiguous request", &argv[0][1]);
if (p == (struct cmdtab *)0)
errx(1, "%s: unknown request", &argv[0][1]);
curcmd = p;
} else {
naptime = atoi(argv[0]);
if (naptime <= 0)
naptime = 5;
}
argc--, argv++;
}
kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
if (kd != NULL) {
/*
* Try to actually read something, we may be in a jail, and
* have /dev/null opened as /dev/mem.
*/
if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 ||
kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) !=
sizeof(dummy)) {
kvm_close(kd);
kd = NULL;
}
}
if (kd == NULL) {
/*
* Maybe we are lacking permissions? Retry, this time with bogus
* devices. We can now use sysctl only.
*/
use_kvm = 0;
kd = kvm_openfiles("/dev/null", "/dev/null", "/dev/null",
O_RDONLY, errbuf);
if (kd == NULL) {
error("%s", errbuf);
exit(1);
}
}
signal(SIGINT, die);
signal(SIGQUIT, die);
signal(SIGTERM, die);
/*
* Initialize display. Load average appears in a one line
* window of its own. Current command's display appears in
* an overlapping sub-window of stdscr configured by the display
* routines to minimize update work by curses.
*/
initscr();
CMDLINE = LINES - 1;
wnd = (*curcmd->c_open)();
if (wnd == NULL) {
warnx("couldn't initialize display");
die(0);
}
wload = newwin(1, 0, 3, 20);
if (wload == NULL) {
warnx("couldn't set up load average window");
die(0);
}
gethostname(hostname, sizeof (hostname));
size = sizeof(clkinfo);
if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0)
|| size != sizeof(clkinfo)) {
error("kern.clockrate");
die(0);
}
hertz = clkinfo.stathz;
(*curcmd->c_init)();
curcmd->c_flags |= CF_INIT;
labels();
dellave = 0.0;
signal(SIGALRM, display);
display(0);
noecho();
crmode();
keyboard();
/*NOTREACHED*/
return EXIT_SUCCESS;
}
void
labels()
{
if (curcmd->c_flags & CF_LOADAV) {
mvaddstr(2, 20,
"/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
mvaddstr(3, 5, "Load Average");
}
(*curcmd->c_label)();
#ifdef notdef
mvprintw(21, 25, "CPU usage on %s", hostname);
#endif
refresh();
}
void
display(signo)
int signo __unused;
{
int i, j;
/* Get the load average over the last minute. */
(void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0]));
(*curcmd->c_fetch)();
if (curcmd->c_flags & CF_LOADAV) {
j = 5.0*avenrun[0] + 0.5;
dellave -= avenrun[0];
if (dellave >= 0.0)
c = '<';
else {
c = '>';
dellave = -dellave;
}
if (dellave < 0.1)
c = '|';
dellave = avenrun[0];
wmove(wload, 0, 0); wclrtoeol(wload);
for (i = (j > 50) ? 50 : j; i > 0; i--)
waddch(wload, c);
if (j > 50)
wprintw(wload, " %4.1f", avenrun[0]);
}
(*curcmd->c_refresh)();
if (curcmd->c_flags & CF_LOADAV)
wrefresh(wload);
wrefresh(wnd);
move(CMDLINE, col);
refresh();
alarm(naptime);
}
void
load()
{
(void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0]));
mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
avenrun[0], avenrun[1], avenrun[2]);
clrtoeol();
}
void
die(signo)
int signo __unused;
{
move(CMDLINE, 0);
clrtoeol();
refresh();
endwin();
exit(0);
}
#include <stdarg.h>
void
error(const char *fmt, ...)
{
va_list ap;
char buf[255];
int oy, ox;
va_start(ap, fmt);
if (wnd) {
getyx(stdscr, oy, ox);
(void) vsnprintf(buf, sizeof(buf), fmt, ap);
clrtoeol();
standout();
mvaddstr(CMDLINE, 0, buf);
standend();
move(oy, ox);
refresh();
} else {
(void) vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
}
va_end(ap);
}
void
nlisterr(n_list)
struct nlist n_list[];
{
int i, n;
n = 0;
clear();
mvprintw(2, 10, "systat: nlist: can't find following symbols:");
for (i = 0;
n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++)
if (n_list[i].n_value == 0)
mvprintw(2 + ++n, 10, "%s", n_list[i].n_name);
move(CMDLINE, 0);
clrtoeol();
refresh();
endwin();
exit(1);
}