Annotation of src/usr.bin/systat/main.c, Revision 1.6
1.6 ! deraadt 1: /* $OpenBSD: main.c,v 1.5 1996/08/06 18:48:15 deraadt Exp $ */
1.3 deraadt 2: /* $NetBSD: main.c,v 1.8 1996/05/10 23:16:36 thorpej Exp $ */
1.1 deraadt 3:
4: /*-
5: * Copyright (c) 1980, 1992, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: static char copyright[] =
39: "@(#) Copyright (c) 1980, 1992, 1993\n\
40: The Regents of the University of California. All rights reserved.\n";
41: #endif /* not lint */
42:
43: #ifndef lint
44: #if 0
45: static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
46: #endif
1.6 ! deraadt 47: static char rcsid[] = "$OpenBSD: main.c,v 1.5 1996/08/06 18:48:15 deraadt Exp $";
1.1 deraadt 48: #endif /* not lint */
49:
50: #include <sys/param.h>
51:
52: #include <err.h>
53: #include <nlist.h>
54: #include <signal.h>
55: #include <stdio.h>
56: #include <string.h>
1.3 deraadt 57: #include <unistd.h>
1.6 ! deraadt 58: #include <limits.h>
1.1 deraadt 59:
60: #include "systat.h"
61: #include "extern.h"
62:
63: static struct nlist namelist[] = {
64: #define X_FIRST 0
65: #define X_HZ 0
66: { "_hz" },
67: #define X_STATHZ 1
68: { "_stathz" },
69: { "" }
70: };
71: static int dellave;
72:
73: kvm_t *kd;
1.3 deraadt 74: char *memf = NULL;
75: char *nlistf = NULL;
1.1 deraadt 76: sig_t sigtstpdfl;
77: double avenrun[3];
78: int col;
79: int naptime = 5;
80: int verbose = 1; /* to report kvm read errs */
81: int hz, stathz;
82: char c;
83: char *namp;
84: char hostname[MAXHOSTNAMELEN];
85: WINDOW *wnd;
86: int CMDLINE;
87:
88: static WINDOW *wload; /* one line window for load average */
89:
1.3 deraadt 90: static void usage();
91:
1.2 deraadt 92: int
1.1 deraadt 93: main(argc, argv)
94: int argc;
95: char **argv;
96: {
1.3 deraadt 97: int ch;
1.6 ! deraadt 98: char errbuf[_POSIX2_LINE_MAX];
1.1 deraadt 99:
1.3 deraadt 100: while ((ch = getopt(argc, argv, "M:N:w:")) != EOF)
101: switch(ch) {
102: case 'M':
103: memf = optarg;
104: break;
105: case 'N':
106: nlistf = optarg;
107: break;
108: case 'w':
109: if ((naptime = atoi(optarg)) <= 0)
110: errx(1, "interval <= 0.");
111: break;
112: case '?':
113: default:
114: usage();
115: }
116: argc -= optind;
117: argv += optind;
118: /*
119: * Discard setgid privileges if not the running kernel so that bad
120: * guys can't print interesting stuff from kernel memory.
121: */
122: if (nlistf != NULL || memf != NULL)
123: setgid(getgid());
124:
1.1 deraadt 125: while (argc > 0) {
1.3 deraadt 126: if (isdigit(argv[0][0])) {
127: naptime = atoi(argv[0]);
128: if (naptime <= 0)
129: naptime = 5;
130: } else {
1.1 deraadt 131: struct cmdtab *p;
132:
1.3 deraadt 133: p = lookup(&argv[0][0]);
1.1 deraadt 134: if (p == (struct cmdtab *)-1)
1.3 deraadt 135: errx(1, "ambiguous request: %s", &argv[0][0]);
1.1 deraadt 136: if (p == 0)
1.3 deraadt 137: errx(1, "unknown request: %s", &argv[0][0]);
1.1 deraadt 138: curcmd = p;
139: }
140: argc--, argv++;
141: }
1.3 deraadt 142: kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
1.1 deraadt 143: if (kd == NULL) {
144: error("%s", errbuf);
145: exit(1);
146: }
147: if (kvm_nlist(kd, namelist)) {
148: nlisterr(namelist);
149: exit(1);
150: }
151: if (namelist[X_FIRST].n_type == 0)
152: errx(1, "couldn't read namelist");
153: signal(SIGINT, die);
154: signal(SIGQUIT, die);
155: signal(SIGTERM, die);
156:
157: /*
158: * Initialize display. Load average appears in a one line
159: * window of its own. Current command's display appears in
160: * an overlapping sub-window of stdscr configured by the display
161: * routines to minimize update work by curses.
162: */
163: if (initscr() == NULL)
164: {
165: warnx("couldn't initialize screen");
166: exit(0);
167: }
168:
169: CMDLINE = LINES - 1;
170: wnd = (*curcmd->c_open)();
171: if (wnd == NULL) {
172: warnx("couldn't initialize display");
173: die(0);
174: }
175: wload = newwin(1, 0, 3, 20);
176: if (wload == NULL) {
177: warnx("couldn't set up load average window");
178: die(0);
179: }
180: gethostname(hostname, sizeof (hostname));
181: NREAD(X_HZ, &hz, LONG);
182: NREAD(X_STATHZ, &stathz, LONG);
183: (*curcmd->c_init)();
184: curcmd->c_flags |= CF_INIT;
185: labels();
186:
187: dellave = 0.0;
188:
189: signal(SIGALRM, display);
190: display(0);
191: noecho();
192: crmode();
193: keyboard();
194: /*NOTREACHED*/
195: }
1.3 deraadt 196:
197: static void
198: usage()
199: {
200: fprintf(stderr, "usage: systat [-M core] [-N system] [-w wait]\n");
201: exit(1);
202: }
203:
1.1 deraadt 204:
205: void
206: labels()
207: {
208: if (curcmd->c_flags & CF_LOADAV) {
209: mvaddstr(2, 20,
210: "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
211: mvaddstr(3, 5, "Load Average");
212: }
213: (*curcmd->c_label)();
214: #ifdef notdef
215: mvprintw(21, 25, "CPU usage on %s", hostname);
216: #endif
217: refresh();
218: }
219:
220: void
221: display(signo)
222: int signo;
223: {
224: register int i, j;
225:
226: /* Get the load average over the last minute. */
227: (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0]));
228: (*curcmd->c_fetch)();
229: if (curcmd->c_flags & CF_LOADAV) {
230: j = 5.0*avenrun[0] + 0.5;
231: dellave -= avenrun[0];
232: if (dellave >= 0.0)
233: c = '<';
234: else {
235: c = '>';
236: dellave = -dellave;
237: }
238: if (dellave < 0.1)
239: c = '|';
240: dellave = avenrun[0];
241: wmove(wload, 0, 0); wclrtoeol(wload);
242: for (i = (j > 50) ? 50 : j; i > 0; i--)
243: waddch(wload, c);
244: if (j > 50)
245: wprintw(wload, " %4.1f", avenrun[0]);
246: }
247: (*curcmd->c_refresh)();
248: if (curcmd->c_flags & CF_LOADAV)
249: wrefresh(wload);
250: wrefresh(wnd);
251: move(CMDLINE, col);
252: refresh();
253: alarm(naptime);
254: }
255:
256: void
257: load()
258: {
259:
260: (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0]));
261: mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
262: avenrun[0], avenrun[1], avenrun[2]);
263: clrtoeol();
264: }
265:
266: void
267: die(signo)
268: int signo;
269: {
270: move(CMDLINE, 0);
271: clrtoeol();
272: refresh();
273: endwin();
274: exit(0);
275: }
276:
277: #if __STDC__
278: #include <stdarg.h>
279: #else
280: #include <varargs.h>
281: #endif
282:
283: #if __STDC__
284: void
285: error(const char *fmt, ...)
286: #else
287: void
288: error(fmt, va_alist)
289: char *fmt;
290: va_dcl
291: #endif
292: {
293: va_list ap;
294: char buf[255];
295: int oy, ox;
296: #if __STDC__
297: va_start(ap, fmt);
298: #else
299: va_start(ap);
300: #endif
301:
302: if (wnd) {
303: getyx(stdscr, oy, ox);
1.5 deraadt 304: (void) vsnprintf(buf, sizeof buf, fmt, ap);
1.1 deraadt 305: clrtoeol();
306: standout();
307: mvaddstr(CMDLINE, 0, buf);
308: standend();
309: move(oy, ox);
310: refresh();
311: } else {
312: (void) vfprintf(stderr, fmt, ap);
313: fprintf(stderr, "\n");
314: }
315: va_end(ap);
316: }
317:
318: void
319: nlisterr(namelist)
320: struct nlist namelist[];
321: {
322: int i, n;
323:
324: n = 0;
325: clear();
326: mvprintw(2, 10, "systat: nlist: can't find following symbols:");
327: for (i = 0;
328: namelist[i].n_name != NULL && *namelist[i].n_name != '\0'; i++)
329: if (namelist[i].n_value == 0)
330: mvprintw(2 + ++n, 10, "%s", namelist[i].n_name);
331: move(CMDLINE, 0);
332: clrtoeol();
333: refresh();
334: endwin();
335: exit(1);
336: }