Annotation of src/usr.bin/systat/main.c, Revision 1.12
1.12 ! mickey 1: /* $OpenBSD: main.c,v 1.11 1997/06/23 22:21:47 millert 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
1.12 ! mickey 47: static char rcsid[] = "$OpenBSD: main.c,v 1.11 1997/06/23 22:21:47 millert 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>
1.11 millert 55: #include <ctype.h>
1.1 deraadt 56: #include <stdio.h>
57: #include <string.h>
1.3 deraadt 58: #include <unistd.h>
1.11 millert 59: #include <stdlib.h>
1.6 deraadt 60: #include <limits.h>
1.1 deraadt 61:
62: #include "systat.h"
63: #include "extern.h"
64:
65: static struct nlist namelist[] = {
66: #define X_FIRST 0
67: #define X_HZ 0
68: { "_hz" },
69: #define X_STATHZ 1
70: { "_stathz" },
71: { "" }
72: };
1.10 kstailey 73: static double dellave;
1.1 deraadt 74:
75: kvm_t *kd;
1.3 deraadt 76: char *memf = NULL;
77: char *nlistf = NULL;
1.1 deraadt 78: sig_t sigtstpdfl;
79: double avenrun[3];
80: int col;
81: int naptime = 5;
82: int verbose = 1; /* to report kvm read errs */
83: int hz, stathz;
84: char c;
85: char *namp;
86: char hostname[MAXHOSTNAMELEN];
87: WINDOW *wnd;
1.11 millert 88: long CMDLINE;
1.1 deraadt 89:
90: static WINDOW *wload; /* one line window for load average */
91:
1.11 millert 92: static void usage __P((void));
1.3 deraadt 93:
1.2 deraadt 94: int
1.1 deraadt 95: main(argc, argv)
96: int argc;
97: char **argv;
98: {
1.3 deraadt 99: int ch;
1.6 deraadt 100: char errbuf[_POSIX2_LINE_MAX];
1.1 deraadt 101:
1.9 millert 102: while ((ch = getopt(argc, argv, "M:N:w:")) != -1)
1.3 deraadt 103: switch(ch) {
104: case 'M':
105: memf = optarg;
106: break;
107: case 'N':
108: nlistf = optarg;
109: break;
110: case 'w':
111: if ((naptime = atoi(optarg)) <= 0)
112: errx(1, "interval <= 0.");
113: break;
114: case '?':
115: default:
116: usage();
117: }
118: argc -= optind;
119: argv += optind;
120: /*
121: * Discard setgid privileges if not the running kernel so that bad
122: * guys can't print interesting stuff from kernel memory.
123: */
1.8 tholo 124: if (nlistf != NULL || memf != NULL) {
125: setegid(getgid());
1.3 deraadt 126: setgid(getgid());
1.8 tholo 127: }
1.3 deraadt 128:
1.1 deraadt 129: while (argc > 0) {
1.3 deraadt 130: if (isdigit(argv[0][0])) {
131: naptime = atoi(argv[0]);
132: if (naptime <= 0)
133: naptime = 5;
134: } else {
1.1 deraadt 135: struct cmdtab *p;
136:
1.3 deraadt 137: p = lookup(&argv[0][0]);
1.1 deraadt 138: if (p == (struct cmdtab *)-1)
1.3 deraadt 139: errx(1, "ambiguous request: %s", &argv[0][0]);
1.1 deraadt 140: if (p == 0)
1.3 deraadt 141: errx(1, "unknown request: %s", &argv[0][0]);
1.1 deraadt 142: curcmd = p;
143: }
144: argc--, argv++;
145: }
1.3 deraadt 146: kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
1.1 deraadt 147: if (kd == NULL) {
148: error("%s", errbuf);
149: exit(1);
150: }
151: if (kvm_nlist(kd, namelist)) {
152: nlisterr(namelist);
153: exit(1);
154: }
155: if (namelist[X_FIRST].n_type == 0)
156: errx(1, "couldn't read namelist");
157: signal(SIGINT, die);
158: signal(SIGQUIT, die);
159: signal(SIGTERM, die);
160:
161: /*
162: * Initialize display. Load average appears in a one line
163: * window of its own. Current command's display appears in
164: * an overlapping sub-window of stdscr configured by the display
165: * routines to minimize update work by curses.
166: */
167: if (initscr() == NULL)
168: {
169: warnx("couldn't initialize screen");
170: exit(0);
171: }
172:
173: CMDLINE = LINES - 1;
174: wnd = (*curcmd->c_open)();
175: if (wnd == NULL) {
176: warnx("couldn't initialize display");
177: die(0);
178: }
179: wload = newwin(1, 0, 3, 20);
180: if (wload == NULL) {
181: warnx("couldn't set up load average window");
182: die(0);
183: }
184: gethostname(hostname, sizeof (hostname));
185: NREAD(X_HZ, &hz, LONG);
186: NREAD(X_STATHZ, &stathz, LONG);
187: (*curcmd->c_init)();
188: curcmd->c_flags |= CF_INIT;
189: labels();
190:
191: dellave = 0.0;
192:
193: signal(SIGALRM, display);
194: display(0);
195: noecho();
196: crmode();
197: keyboard();
198: /*NOTREACHED*/
199: }
1.3 deraadt 200:
201: static void
202: usage()
203: {
204: fprintf(stderr, "usage: systat [-M core] [-N system] [-w wait]\n");
1.7 niklas 205: fprintf(stderr,
206: " [iostat|mbufs|netstat|pigs|swap|vmstat]\n");
1.3 deraadt 207: exit(1);
208: }
209:
1.1 deraadt 210:
211: void
212: labels()
213: {
214: if (curcmd->c_flags & CF_LOADAV) {
215: mvaddstr(2, 20,
216: "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
217: mvaddstr(3, 5, "Load Average");
218: }
219: (*curcmd->c_label)();
220: #ifdef notdef
221: mvprintw(21, 25, "CPU usage on %s", hostname);
222: #endif
223: refresh();
224: }
225:
226: void
227: display(signo)
228: int signo;
229: {
230: register int i, j;
231:
232: /* Get the load average over the last minute. */
233: (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0]));
234: (*curcmd->c_fetch)();
235: if (curcmd->c_flags & CF_LOADAV) {
236: j = 5.0*avenrun[0] + 0.5;
237: dellave -= avenrun[0];
238: if (dellave >= 0.0)
239: c = '<';
240: else {
241: c = '>';
242: dellave = -dellave;
243: }
1.10 kstailey 244: if (dellave < 0.05)
1.1 deraadt 245: c = '|';
246: dellave = avenrun[0];
247: wmove(wload, 0, 0); wclrtoeol(wload);
248: for (i = (j > 50) ? 50 : j; i > 0; i--)
249: waddch(wload, c);
250: if (j > 50)
251: wprintw(wload, " %4.1f", avenrun[0]);
252: }
253: (*curcmd->c_refresh)();
254: if (curcmd->c_flags & CF_LOADAV)
255: wrefresh(wload);
256: wrefresh(wnd);
257: move(CMDLINE, col);
258: refresh();
259: alarm(naptime);
260: }
261:
262: void
263: load()
264: {
265:
266: (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0]));
267: mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
268: avenrun[0], avenrun[1], avenrun[2]);
269: clrtoeol();
270: }
271:
272: void
273: die(signo)
274: int signo;
275: {
276: move(CMDLINE, 0);
277: clrtoeol();
278: refresh();
279: endwin();
280: exit(0);
281: }
282:
1.12 ! mickey 283: #ifdef __STDC__
1.1 deraadt 284: #include <stdarg.h>
285: #else
286: #include <varargs.h>
287: #endif
288:
1.12 ! mickey 289: #ifdef __STDC__
1.1 deraadt 290: void
291: error(const char *fmt, ...)
292: #else
293: void
294: error(fmt, va_alist)
295: char *fmt;
296: va_dcl
297: #endif
298: {
299: va_list ap;
300: char buf[255];
301: int oy, ox;
1.12 ! mickey 302: #ifdef __STDC__
1.1 deraadt 303: va_start(ap, fmt);
304: #else
305: va_start(ap);
306: #endif
307:
308: if (wnd) {
309: getyx(stdscr, oy, ox);
1.5 deraadt 310: (void) vsnprintf(buf, sizeof buf, fmt, ap);
1.1 deraadt 311: clrtoeol();
312: standout();
313: mvaddstr(CMDLINE, 0, buf);
314: standend();
315: move(oy, ox);
316: refresh();
317: } else {
318: (void) vfprintf(stderr, fmt, ap);
319: fprintf(stderr, "\n");
320: }
321: va_end(ap);
322: }
323:
324: void
325: nlisterr(namelist)
326: struct nlist namelist[];
327: {
328: int i, n;
329:
330: n = 0;
331: clear();
332: mvprintw(2, 10, "systat: nlist: can't find following symbols:");
333: for (i = 0;
334: namelist[i].n_name != NULL && *namelist[i].n_name != '\0'; i++)
335: if (namelist[i].n_value == 0)
336: mvprintw(2 + ++n, 10, "%s", namelist[i].n_name);
337: move(CMDLINE, 0);
338: clrtoeol();
339: refresh();
340: endwin();
341: exit(1);
342: }
![[BACK]](/icons/back.gif){kind=icon}
Return to main.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / systat