+/*% cc -a % -lcurses -ltermlib -lm
+ */
+#ifndef lint
+static char sccsid[] = "@(#)main.c 1.1 (Lucasfilm) %G%";
+#endif
+
+#include "systat.h"
+
+struct nlist nlst[] = {
+#define X_PROC 0
+ { "_proc" },
+#define X_NPROC 1
+ { "_nproc" },
+#define X_CCPU 2
+ { "_ccpu" },
+#define X_AVENRUN 3
+ { "_avenrun" },
+#define X_USRPTMAP 4
+ { "_Usrptmap" },
+#define X_USRPT 5
+ { "_usrpt" },
+#define X_NSWAP 6
+ { "_nswap" },
+#define X_SWAPMAP 7
+ { "_swapmap" },
+#define X_NSWAPMAP 8
+ { "_nswapmap" },
+#define X_DMMIN 9
+ { "_dmmin" },
+#define X_DMMAX 10
+ { "_dmmax" },
+#define X_NSWDEV 11
+ { "_nswdev" },
+ { "" }
+};
+
+int kmem = -1;
+int mem = -1;
+int swap = -1;
+
+int die();
+int display();
+int suspend();
+
+int showpigs(), openpigs(), fetchpigs(), labelpigs();
+int showswap(), fetchswap(), labelswap();
+int showuser(), openuser(), fetchuser(), labeluser();
+int shownet(), opennet(), fetchnet(), labelnet();
+
+struct cmdtab {
+ char *c_name;
+ int (*c_refresh)();
+ int (*c_open)();
+ int (*c_fetch)();
+ int (*c_label)();
+} cmdtab[] = {
+ { "pigs", showpigs, openpigs, fetchpigs,
+ labelpigs },
+ { "swap", showswap, openpigs, fetchswap,
+ labelswap },
+#ifdef notdef
+ { "user", showuser, openuser, fetchuser,
+ labeluser },
+ { "net", shownet, opennet, fetchnet,
+ labelnet },
+#endif
+ { "" }
+};
+struct cmdtab *curcmd = &cmdtab[0];
+
+main(argc, argv)
+ int argc;
+ char **argv;
+{
+ char ch, line[80];
+
+ nlist("/vmunix", nlst);
+ (*curcmd->c_open)();
+ naptime = 5;
+ if (argc != 1)
+ naptime = atoi(argv[1]);
+ if (naptime < 5)
+ naptime = 5;
+ signal(SIGINT, die);
+ signal(SIGQUIT, die);
+ signal(SIGTERM, die);
+
+ /* Initialize curses. */
+ initscr();
+ wnd = newwin(20, 70, 3, 5);
+
+ lseek(kmem, nlst[X_CCPU].n_value, 0);
+ read(kmem, &ccpu, sizeof (ccpu));
+ lccpu = log(ccpu);
+ (*curcmd->c_fetch)();
+ gethostname(hostname, sizeof (hostname));
+ labels();
+
+ known[0].k_uid = -1;
+ strcpy(known[0].k_name, "<idle>");
+ numknown = 1;
+ dellave = 0.0;
+
+ signal(SIGALRM, display);
+ signal(SIGTSTP, suspend);
+ display();
+ noecho();
+ crmode();
+ for (;;) {
+ col = 0;
+ move(22, 0);
+ do {
+ refresh();
+ ch = getch() & 0177;
+ if (ch == 0177 && ferror(stdin)) {
+ clearerr(stdin);
+ continue;
+ }
+ if (ch >= 'A' && ch <= 'Z')
+ ch += 'a' - 'A';
+ if (col == 0) {
+ if (ch == CTRL(l)) {
+ wrefresh(curscr);
+ continue;
+ }
+ if (ch != ':')
+ continue;
+ move(22, 0);
+ clrtoeol();
+ }
+ if (ch == _tty.sg_erase && col > 0) {
+ if (col == 1 && line[0] == ':')
+ continue;
+ col--;
+ goto doerase;
+ }
+ if (ch == CTRL(w) && col > 0) {
+ while (--col >= 0 && isspace(line[col]))
+ ;
+ col++;
+ while (--col >= 0 && !isspace(line[col]))
+ if (col == 0 && line[0] == ':')
+ break;
+ col++;
+ goto doerase;
+ }
+ if (ch == _tty.sg_kill && col > 0) {
+ col = 0;
+ if (line[0] == ':')
+ col++;
+ doerase:
+ move(22, col);
+ clrtoeol();
+ continue;
+ }
+ if (isprint(ch)) {
+ line[col] = ch;
+ mvaddch(22, col, ch);
+ col++;
+ }
+ } while (col == 0 || (ch != '\r' && ch != '\n'));
+ line[col] = '\0';
+ command(line + 1);
+ }
+}
+
+command(cmd)
+ char *cmd;
+{
+ register char *cp;
+ register struct cmdtab *p;
+ char *arg;
+
+ for (cp = cmd; *cp && !isspace(*cp); cp++)
+ ;
+ if (*cp)
+ *cp++ = '\0';
+ if (strcmp(cmd, "quit") == 0)
+ die();
+ if (strcmp(cmd, "status") == 0 || strcmp(cmd, "help") == 0) {
+ status();
+ return;
+ }
+ for (p = cmdtab; *p->c_name; p++)
+ if (strcmp(cmd, p->c_name) == 0)
+ break;
+ if (*p->c_name) {
+ if (curcmd == p)
+ return;
+ alarm(0);
+ curcmd = p;
+ wclear(wnd);
+ (*p->c_label)();
+ display();
+ status();
+ return;
+ }
+ if (strcmp(cmd, "stop") == 0) {
+ alarm(0);
+ mvaddstr(22, 0, "Refresh disabled.");
+ clrtoeol();
+ return;
+ }
+ /* commands with arguments */
+ for (; *cp && isspace(*cp); cp++)
+ ;
+ if (strcmp(cmd, "start") == 0) {
+ int x;
+
+ if (*cp == '\0')
+ x = naptime;
+ else
+ x = atoi(cp);
+ if (x <= 0) {
+ mvprintw(22, 0, "%d: bad interval.", x);
+ clrtoeol();
+ return;
+ }
+ alarm(0);
+ naptime = x;
+ display();
+ status();
+ return;
+ }
+ mvprintw(22, 0, "%s: Unknown command.", cmd);
+ clrtoeol();
+}
+
+status()
+{
+
+ mvprintw(22, 0, "Showing %s, refresh every %d seconds.",
+ curcmd->c_name, naptime);
+ clrtoeol();
+}
+
+suspend()
+{
+ int oldmask;
+
+ move(22, 0);
+ refresh();
+ echo();
+ nocrmode();
+ signal(SIGTSTP, SIG_DFL);
+ oldmask = sigsetmask(0);
+ kill(getpid(), SIGTSTP);
+ sigsetmask(oldmask);
+ signal(SIGTSTP, suspend);
+ crmode();
+ noecho();
+ move(22, col);
+ wrefresh(curscr);
+}
+
+labels()
+{
+
+ mvaddstr(2, 20,
+ "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
+ mvwaddstr(wnd, 0, 0, "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, &lave, sizeof (lave));
+ (*curcmd->c_fetch)();
+ j = 5.0*lave + 0.5;
+ dellave -= lave;
+ if (dellave >= 0.0)
+ c = '<';
+ else {
+ c = '>';
+ dellave = -dellave;
+ }
+ if (dellave < 0.1)
+ c = '|';
+ dellave = lave;
+ wmove(wnd, 0, 15);
+ wclrtoeol(wnd);
+ for (i = (j > 50)? 50 : j; i > 0; i--)
+ waddch(wnd, c);
+ if (j > 50)
+ wprintw(wnd, " %4.1f", lave);
+ (*curcmd->c_refresh)();
+ wrefresh(wnd);
+ move(22, col);
+ refresh();
+ alarm(naptime);
+}
+
+die()
+{
+
+ endwin();
+ exit(0);
+}
projects / unix-history / commitdiff