Annotation of src/usr.bin/systat/main.c, Revision 1.3
1.3 ! deraadt 1: /* $NetBSD: main.c,v 1.8 1996/05/10 23:16:36 thorpej Exp $ */
1.1 deraadt 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
1.3 ! deraadt 46: static char rcsid[] = "$NetBSD: main.c,v 1.8 1996/05/10 23:16:36 thorpej Exp $";
1.1 deraadt 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>
1.3 ! deraadt 56: #include <unistd.h>
1.1 deraadt 57:
58: #include "systat.h"
59: #include "extern.h"
60:
61: static struct nlist namelist[] = {
62: #define X_FIRST 0
63: #define X_HZ 0
64: { "_hz" },
65: #define X_STATHZ 1
66: { "_stathz" },
67: { "" }
68: };
69: static int dellave;
70:
71: kvm_t *kd;
1.3 ! deraadt 72: char *memf = NULL;
! 73: char *nlistf = NULL;
1.1 deraadt 74: sig_t sigtstpdfl;
75: double avenrun[3];
76: int col;
77: int naptime = 5;
78: int verbose = 1; /* to report kvm read errs */
79: int hz, stathz;
80: char c;
81: char *namp;
82: char hostname[MAXHOSTNAMELEN];
83: WINDOW *wnd;
84: int CMDLINE;
85:
86: static WINDOW *wload; /* one line window for load average */
87:
1.3 ! deraadt 88: static void usage();
! 89:
1.2 deraadt 90: int
1.1 deraadt 91: main(argc, argv)
92: int argc;
93: char **argv;
94: {
1.3 ! deraadt 95: int ch;
1.1 deraadt 96: char errbuf[80];
97:
1.3 ! deraadt 98: while ((ch = getopt(argc, argv, "M:N:w:")) != EOF)
! 99: switch(ch) {
! 100: case 'M':
! 101: memf = optarg;
! 102: break;
! 103: case 'N':
! 104: nlistf = optarg;
! 105: break;
! 106: case 'w':
! 107: if ((naptime = atoi(optarg)) <= 0)
! 108: errx(1, "interval <= 0.");
! 109: break;
! 110: case '?':
! 111: default:
! 112: usage();
! 113: }
! 114: argc -= optind;
! 115: argv += optind;
! 116: /*
! 117: * Discard setgid privileges if not the running kernel so that bad
! 118: * guys can't print interesting stuff from kernel memory.
! 119: */
! 120: if (nlistf != NULL || memf != NULL)
! 121: setgid(getgid());
! 122:
1.1 deraadt 123: while (argc > 0) {
1.3 ! deraadt 124: if (isdigit(argv[0][0])) {
! 125: naptime = atoi(argv[0]);
! 126: if (naptime <= 0)
! 127: naptime = 5;
! 128: } else {
1.1 deraadt 129: struct cmdtab *p;
130:
1.3 ! deraadt 131: p = lookup(&argv[0][0]);
1.1 deraadt 132: if (p == (struct cmdtab *)-1)
1.3 ! deraadt 133: errx(1, "ambiguous request: %s", &argv[0][0]);
1.1 deraadt 134: if (p == 0)
1.3 ! deraadt 135: errx(1, "unknown request: %s", &argv[0][0]);
1.1 deraadt 136: curcmd = p;
137: }
138: argc--, argv++;
139: }
1.3 ! deraadt 140: kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
1.1 deraadt 141: if (kd == NULL) {
142: error("%s", errbuf);
143: exit(1);
144: }
145: if (kvm_nlist(kd, namelist)) {
146: nlisterr(namelist);
147: exit(1);
148: }
149: if (namelist[X_FIRST].n_type == 0)
150: errx(1, "couldn't read namelist");
151: signal(SIGINT, die);
152: signal(SIGQUIT, die);
153: signal(SIGTERM, die);
154:
155: /*
156: * Initialize display. Load average appears in a one line
157: * window of its own. Current command's display appears in
158: * an overlapping sub-window of stdscr configured by the display
159: * routines to minimize update work by curses.
160: */
161: if (initscr() == NULL)
162: {
163: warnx("couldn't initialize screen");
164: exit(0);
165: }
166:
167: CMDLINE = LINES - 1;
168: wnd = (*curcmd->c_open)();
169: if (wnd == NULL) {
170: warnx("couldn't initialize display");
171: die(0);
172: }
173: wload = newwin(1, 0, 3, 20);
174: if (wload == NULL) {
175: warnx("couldn't set up load average window");
176: die(0);
177: }
178: gethostname(hostname, sizeof (hostname));
179: NREAD(X_HZ, &hz, LONG);
180: NREAD(X_STATHZ, &stathz, LONG);
181: (*curcmd->c_init)();
182: curcmd->c_flags |= CF_INIT;
183: labels();
184:
185: dellave = 0.0;
186:
187: signal(SIGALRM, display);
188: display(0);
189: noecho();
190: crmode();
191: keyboard();
192: /*NOTREACHED*/
193: }
1.3 ! deraadt 194:
! 195: static void
! 196: usage()
! 197: {
! 198: fprintf(stderr, "usage: systat [-M core] [-N system] [-w wait]\n");
! 199: exit(1);
! 200: }
! 201:
1.1 deraadt 202:
203: void
204: labels()
205: {
206: if (curcmd->c_flags & CF_LOADAV) {
207: mvaddstr(2, 20,
208: "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
209: mvaddstr(3, 5, "Load Average");
210: }
211: (*curcmd->c_label)();
212: #ifdef notdef
213: mvprintw(21, 25, "CPU usage on %s", hostname);
214: #endif
215: refresh();
216: }
217:
218: void
219: display(signo)
220: int signo;
221: {
222: register int i, j;
223:
224: /* Get the load average over the last minute. */
225: (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0]));
226: (*curcmd->c_fetch)();
227: if (curcmd->c_flags & CF_LOADAV) {
228: j = 5.0*avenrun[0] + 0.5;
229: dellave -= avenrun[0];
230: if (dellave >= 0.0)
231: c = '<';
232: else {
233: c = '>';
234: dellave = -dellave;
235: }
236: if (dellave < 0.1)
237: c = '|';
238: dellave = avenrun[0];
239: wmove(wload, 0, 0); wclrtoeol(wload);
240: for (i = (j > 50) ? 50 : j; i > 0; i--)
241: waddch(wload, c);
242: if (j > 50)
243: wprintw(wload, " %4.1f", avenrun[0]);
244: }
245: (*curcmd->c_refresh)();
246: if (curcmd->c_flags & CF_LOADAV)
247: wrefresh(wload);
248: wrefresh(wnd);
249: move(CMDLINE, col);
250: refresh();
251: alarm(naptime);
252: }
253:
254: void
255: load()
256: {
257:
258: (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0]));
259: mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
260: avenrun[0], avenrun[1], avenrun[2]);
261: clrtoeol();
262: }
263:
264: void
265: die(signo)
266: int signo;
267: {
268: move(CMDLINE, 0);
269: clrtoeol();
270: refresh();
271: endwin();
272: exit(0);
273: }
274:
275: #if __STDC__
276: #include <stdarg.h>
277: #else
278: #include <varargs.h>
279: #endif
280:
281: #if __STDC__
282: void
283: error(const char *fmt, ...)
284: #else
285: void
286: error(fmt, va_alist)
287: char *fmt;
288: va_dcl
289: #endif
290: {
291: va_list ap;
292: char buf[255];
293: int oy, ox;
294: #if __STDC__
295: va_start(ap, fmt);
296: #else
297: va_start(ap);
298: #endif
299:
300: if (wnd) {
301: getyx(stdscr, oy, ox);
302: (void) vsprintf(buf, fmt, ap);
303: clrtoeol();
304: standout();
305: mvaddstr(CMDLINE, 0, buf);
306: standend();
307: move(oy, ox);
308: refresh();
309: } else {
310: (void) vfprintf(stderr, fmt, ap);
311: fprintf(stderr, "\n");
312: }
313: va_end(ap);
314: }
315:
316: void
317: nlisterr(namelist)
318: struct nlist namelist[];
319: {
320: int i, n;
321:
322: n = 0;
323: clear();
324: mvprintw(2, 10, "systat: nlist: can't find following symbols:");
325: for (i = 0;
326: namelist[i].n_name != NULL && *namelist[i].n_name != '\0'; i++)
327: if (namelist[i].n_value == 0)
328: mvprintw(2 + ++n, 10, "%s", namelist[i].n_name);
329: move(CMDLINE, 0);
330: clrtoeol();
331: refresh();
332: endwin();
333: exit(1);
334: }
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