BSD 4_3 release

[unix-history] / usr / src / ucb / systat / main.c

/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.  The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
All rights reserved.\n";
#endif not lint

#ifndef lint
static char sccsid[] = "@(#)main.c      5.2 (Berkeley) 8/13/85";
#endif not lint

#include "systat.h"

static struct nlist nlst[] = {
#define X_CCPU          0
       { "_ccpu" },
#define X_AVENRUN       1
       { "_avenrun" },
#define X_HZ            2
       { "_hz" },
#define X_PHZ           3
       { "_phz" },
       { "" }
};

int     kmem = -1;
int     mem = -1;
int     swap = -1;
int     naptime = 5;

int     die();
int     display();
int     suspend();
int     (*sigtstpdfl)();

double  ccpu;
int     dellave;

static  WINDOW *wload;                  /* one line window for load average */

main(argc, argv)
       int argc;
       char **argv;
{

       argc--, argv++;
       while (argc > 0) {
               if (argv[0][0] == '-') {
                       struct cmdtab *p;

                       p = lookup(&argv[0][1]);
                       if (p == (struct cmdtab *)-1) {
                               fprintf(stderr, "%s: unknown request\n",
                                   &argv[0][1]);
                               exit(1);
                       }
                       curcmd = p;
               } else {
                       naptime = atoi(argv[1]);
                       if (naptime < 5)
                               naptime = 5;
               }
               argc--, argv++;
       }
       nlist("/vmunix", nlst);
       if (nlst[X_CCPU].n_type == 0) {
               fprintf(stderr, "Couldn't namelist /vmunix.\n");
               exit(1);
       }
       kmemf = "/dev/kmem";
       kmem = open(kmemf, O_RDONLY);
       if (kmem < 0) {
               perror(kmemf);
               exit(1);
       }
       memf = "/dev/mem";
       mem = open(memf, O_RDONLY);
       if (mem < 0) {
               perror(memf);
               exit(1);
       }
       swapf = "/dev/drum";
       swap = open(swapf, O_RDONLY);
       if (swap < 0) {
               perror(swapf);
               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) {
               fprintf(stderr, "Couldn't initialize display.\n");
               die();
       }
       wload = newwin(1, 0, 3, 20);
       if (wload == NULL) {
               fprintf(stderr, "Couldn't set up load average window.\n");
               die();
       }

       gethostname(hostname, sizeof (hostname));
       lseek(kmem, nlst[X_CCPU].n_value, L_SET);
       read(kmem, &ccpu, sizeof (ccpu));
       lccpu = log(ccpu);
       hz = getw(nlst[X_HZ].n_value);
       phz = getw(nlst[X_PHZ].n_value);
       (*curcmd->c_init)();
       curcmd->c_flags |= CF_INIT;
       labels();

       known[0].k_uid = -1;
       known[0].k_name[0] = '\0';
       numknown = 1;
       procs[0].pid = -1;
       strcpy(procs[0].cmd, "<idle>");
       numprocs = 1;
       dellave = 0.0;

       signal(SIGALRM, display);
       sigtstpdfl = signal(SIGTSTP, suspend);
       display();
       noecho();
       crmode();
       keyboard();
       /*NOTREACHED*/
}

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();
}

display()
{
       register int i, j;

       /* Get the load average over the last minute. */
       lseek(kmem, nlst[X_AVENRUN].n_value, L_SET);
       read(kmem, avenrun, sizeof (avenrun));
       (*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);
}

load()
{
       double  avenrun[3];

       lseek(kmem, nlst[X_AVENRUN].n_value, L_SET);
       read(kmem, avenrun, sizeof (avenrun));
       mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
           avenrun[0], avenrun[1], avenrun[2]);
       clrtoeol();
}

die()
{

       endwin();
       exit(0);
}

error(fmt, a1, a2, a3)
{

       mvprintw(CMDLINE, 0, fmt, a1, a2, a3);
       clrtoeol();
       refresh();
}