Annotation of src/usr.bin/systat/main.c, Revision 1.1
1.1 ! deraadt 1: /* $NetBSD: main.c,v 1.6 1995/05/06 06:25:07 jtc Exp $ */
! 2:
! 3: /*-
! 4: * Copyright (c) 1980, 1992, 1993
! 5: * The Regents of the University of California. All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by the University of
! 18: * California, Berkeley and its contributors.
! 19: * 4. Neither the name of the University nor the names of its contributors
! 20: * may be used to endorse or promote products derived from this software
! 21: * without specific prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 33: * SUCH DAMAGE.
! 34: */
! 35:
! 36: #ifndef lint
! 37: static char copyright[] =
! 38: "@(#) Copyright (c) 1980, 1992, 1993\n\
! 39: The Regents of the University of California. All rights reserved.\n";
! 40: #endif /* not lint */
! 41:
! 42: #ifndef lint
! 43: #if 0
! 44: static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
! 45: #endif
! 46: static char rcsid[] = "$NetBSD: main.c,v 1.6 1995/05/06 06:25:07 jtc Exp $";
! 47: #endif /* not lint */
! 48:
! 49: #include <sys/param.h>
! 50:
! 51: #include <err.h>
! 52: #include <nlist.h>
! 53: #include <signal.h>
! 54: #include <stdio.h>
! 55: #include <string.h>
! 56:
! 57: #include "systat.h"
! 58: #include "extern.h"
! 59:
! 60: static struct nlist namelist[] = {
! 61: #define X_FIRST 0
! 62: #define X_HZ 0
! 63: { "_hz" },
! 64: #define X_STATHZ 1
! 65: { "_stathz" },
! 66: { "" }
! 67: };
! 68: static int dellave;
! 69:
! 70: kvm_t *kd;
! 71: sig_t sigtstpdfl;
! 72: double avenrun[3];
! 73: int col;
! 74: int naptime = 5;
! 75: int verbose = 1; /* to report kvm read errs */
! 76: int hz, stathz;
! 77: char c;
! 78: char *namp;
! 79: char hostname[MAXHOSTNAMELEN];
! 80: WINDOW *wnd;
! 81: int CMDLINE;
! 82:
! 83: static WINDOW *wload; /* one line window for load average */
! 84:
! 85: void
! 86: main(argc, argv)
! 87: int argc;
! 88: char **argv;
! 89: {
! 90: char errbuf[80];
! 91:
! 92: argc--, argv++;
! 93: while (argc > 0) {
! 94: if (argv[0][0] == '-') {
! 95: struct cmdtab *p;
! 96:
! 97: p = lookup(&argv[0][1]);
! 98: if (p == (struct cmdtab *)-1)
! 99: errx(1, "ambiguous request: %s", &argv[0][1]);
! 100: if (p == 0)
! 101: errx(1, "unknown request: %s", &argv[0][1]);
! 102: curcmd = p;
! 103: } else {
! 104: naptime = atoi(argv[0]);
! 105: if (naptime <= 0)
! 106: naptime = 5;
! 107: }
! 108: argc--, argv++;
! 109: }
! 110: kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
! 111: if (kd == NULL) {
! 112: error("%s", errbuf);
! 113: exit(1);
! 114: }
! 115: if (kvm_nlist(kd, namelist)) {
! 116: nlisterr(namelist);
! 117: exit(1);
! 118: }
! 119: if (namelist[X_FIRST].n_type == 0)
! 120: errx(1, "couldn't read namelist");
! 121: signal(SIGINT, die);
! 122: signal(SIGQUIT, die);
! 123: signal(SIGTERM, die);
! 124:
! 125: /*
! 126: * Initialize display. Load average appears in a one line
! 127: * window of its own. Current command's display appears in
! 128: * an overlapping sub-window of stdscr configured by the display
! 129: * routines to minimize update work by curses.
! 130: */
! 131: if (initscr() == NULL)
! 132: {
! 133: warnx("couldn't initialize screen");
! 134: exit(0);
! 135: }
! 136:
! 137: CMDLINE = LINES - 1;
! 138: wnd = (*curcmd->c_open)();
! 139: if (wnd == NULL) {
! 140: warnx("couldn't initialize display");
! 141: die(0);
! 142: }
! 143: wload = newwin(1, 0, 3, 20);
! 144: if (wload == NULL) {
! 145: warnx("couldn't set up load average window");
! 146: die(0);
! 147: }
! 148: gethostname(hostname, sizeof (hostname));
! 149: NREAD(X_HZ, &hz, LONG);
! 150: NREAD(X_STATHZ, &stathz, LONG);
! 151: (*curcmd->c_init)();
! 152: curcmd->c_flags |= CF_INIT;
! 153: labels();
! 154:
! 155: dellave = 0.0;
! 156:
! 157: signal(SIGALRM, display);
! 158: display(0);
! 159: noecho();
! 160: crmode();
! 161: keyboard();
! 162: /*NOTREACHED*/
! 163: }
! 164:
! 165: void
! 166: labels()
! 167: {
! 168: if (curcmd->c_flags & CF_LOADAV) {
! 169: mvaddstr(2, 20,
! 170: "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
! 171: mvaddstr(3, 5, "Load Average");
! 172: }
! 173: (*curcmd->c_label)();
! 174: #ifdef notdef
! 175: mvprintw(21, 25, "CPU usage on %s", hostname);
! 176: #endif
! 177: refresh();
! 178: }
! 179:
! 180: void
! 181: display(signo)
! 182: int signo;
! 183: {
! 184: register int i, j;
! 185:
! 186: /* Get the load average over the last minute. */
! 187: (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0]));
! 188: (*curcmd->c_fetch)();
! 189: if (curcmd->c_flags & CF_LOADAV) {
! 190: j = 5.0*avenrun[0] + 0.5;
! 191: dellave -= avenrun[0];
! 192: if (dellave >= 0.0)
! 193: c = '<';
! 194: else {
! 195: c = '>';
! 196: dellave = -dellave;
! 197: }
! 198: if (dellave < 0.1)
! 199: c = '|';
! 200: dellave = avenrun[0];
! 201: wmove(wload, 0, 0); wclrtoeol(wload);
! 202: for (i = (j > 50) ? 50 : j; i > 0; i--)
! 203: waddch(wload, c);
! 204: if (j > 50)
! 205: wprintw(wload, " %4.1f", avenrun[0]);
! 206: }
! 207: (*curcmd->c_refresh)();
! 208: if (curcmd->c_flags & CF_LOADAV)
! 209: wrefresh(wload);
! 210: wrefresh(wnd);
! 211: move(CMDLINE, col);
! 212: refresh();
! 213: alarm(naptime);
! 214: }
! 215:
! 216: void
! 217: load()
! 218: {
! 219:
! 220: (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0]));
! 221: mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
! 222: avenrun[0], avenrun[1], avenrun[2]);
! 223: clrtoeol();
! 224: }
! 225:
! 226: void
! 227: die(signo)
! 228: int signo;
! 229: {
! 230: move(CMDLINE, 0);
! 231: clrtoeol();
! 232: refresh();
! 233: endwin();
! 234: exit(0);
! 235: }
! 236:
! 237: #if __STDC__
! 238: #include <stdarg.h>
! 239: #else
! 240: #include <varargs.h>
! 241: #endif
! 242:
! 243: #if __STDC__
! 244: void
! 245: error(const char *fmt, ...)
! 246: #else
! 247: void
! 248: error(fmt, va_alist)
! 249: char *fmt;
! 250: va_dcl
! 251: #endif
! 252: {
! 253: va_list ap;
! 254: char buf[255];
! 255: int oy, ox;
! 256: #if __STDC__
! 257: va_start(ap, fmt);
! 258: #else
! 259: va_start(ap);
! 260: #endif
! 261:
! 262: if (wnd) {
! 263: getyx(stdscr, oy, ox);
! 264: (void) vsprintf(buf, fmt, ap);
! 265: clrtoeol();
! 266: standout();
! 267: mvaddstr(CMDLINE, 0, buf);
! 268: standend();
! 269: move(oy, ox);
! 270: refresh();
! 271: } else {
! 272: (void) vfprintf(stderr, fmt, ap);
! 273: fprintf(stderr, "\n");
! 274: }
! 275: va_end(ap);
! 276: }
! 277:
! 278: void
! 279: nlisterr(namelist)
! 280: struct nlist namelist[];
! 281: {
! 282: int i, n;
! 283:
! 284: n = 0;
! 285: clear();
! 286: mvprintw(2, 10, "systat: nlist: can't find following symbols:");
! 287: for (i = 0;
! 288: namelist[i].n_name != NULL && *namelist[i].n_name != '\0'; i++)
! 289: if (namelist[i].n_value == 0)
! 290: mvprintw(2 + ++n, 10, "%s", namelist[i].n_name);
! 291: move(CMDLINE, 0);
! 292: clrtoeol();
! 293: refresh();
! 294: endwin();
! 295: exit(1);
! 296: }
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