Annotation of src/usr.bin/systat/main.c, Revision 1.31
1.31 ! djm 1: /* $OpenBSD: main.c,v 1.30 2004/04/26 19:22:30 itojun 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.
1.26 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #ifndef lint
34: static char copyright[] =
35: "@(#) Copyright (c) 1980, 1992, 1993\n\
36: The Regents of the University of California. All rights reserved.\n";
37: #endif /* not lint */
38:
39: #ifndef lint
40: #if 0
41: static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
42: #endif
1.31 ! djm 43: static char rcsid[] = "$OpenBSD: main.c,v 1.30 2004/04/26 19:22:30 itojun Exp $";
1.1 deraadt 44: #endif /* not lint */
45:
46: #include <sys/param.h>
1.21 deraadt 47: #include <sys/sysctl.h>
1.1 deraadt 48:
49: #include <err.h>
50: #include <nlist.h>
51: #include <signal.h>
1.11 millert 52: #include <ctype.h>
1.1 deraadt 53: #include <stdio.h>
54: #include <string.h>
1.3 deraadt 55: #include <unistd.h>
1.11 millert 56: #include <stdlib.h>
1.6 deraadt 57: #include <limits.h>
1.23 millert 58: #include <stdarg.h>
1.1 deraadt 59:
60: #include "systat.h"
61: #include "extern.h"
62:
1.21 deraadt 63: double dellave;
1.1 deraadt 64:
1.21 deraadt 65: kvm_t *kd;
66: char *nlistf = NULL;
1.20 pvalchev 67: char *memf = NULL;
1.1 deraadt 68: sig_t sigtstpdfl;
1.21 deraadt 69: double avenrun[3];
70: int col;
1.1 deraadt 71: int naptime = 5;
1.21 deraadt 72: int verbose = 1; /* to report kvm read errs */
1.30 itojun 73: int nflag = 0;
1.21 deraadt 74: int hz, stathz;
1.1 deraadt 75: char c;
76: char *namp;
77: char hostname[MAXHOSTNAMELEN];
78: WINDOW *wnd;
1.11 millert 79: long CMDLINE;
1.1 deraadt 80:
1.21 deraadt 81: WINDOW *wload; /* one line window for load average */
1.1 deraadt 82:
1.22 millert 83: static void usage(void);
1.3 deraadt 84:
1.2 deraadt 85: int
1.24 deraadt 86: main(int argc, char *argv[])
1.1 deraadt 87: {
1.21 deraadt 88: int ch;
1.6 deraadt 89: char errbuf[_POSIX2_LINE_MAX];
1.31 ! djm 90: gid_t gid;
1.1 deraadt 91:
1.25 deraadt 92: kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
93: if (kd == NULL) {
94: error("%s", errbuf);
95: exit(1);
96: }
97:
1.31 ! djm 98: gid = getgid();
! 99: if (setresgid(gid, gid, gid) == -1)
! 100: err(1, "setresgid");
1.25 deraadt 101:
1.30 itojun 102: while ((ch = getopt(argc, argv, "nw:")) != -1)
1.24 deraadt 103: switch (ch) {
1.30 itojun 104: case 'n':
105: nflag = 1;
106: break;
1.21 deraadt 107: case 'w':
108: if ((naptime = atoi(optarg)) <= 0)
109: errx(1, "interval <= 0.");
110: break;
111: default:
112: usage();
113: }
114: argc -= optind;
115: argv += optind;
1.3 deraadt 116:
1.1 deraadt 117: while (argc > 0) {
1.3 deraadt 118: if (isdigit(argv[0][0])) {
119: naptime = atoi(argv[0]);
120: if (naptime <= 0)
121: naptime = 5;
122: } else {
1.1 deraadt 123: struct cmdtab *p;
124:
1.3 deraadt 125: p = lookup(&argv[0][0]);
1.1 deraadt 126: if (p == (struct cmdtab *)-1)
1.3 deraadt 127: errx(1, "ambiguous request: %s", &argv[0][0]);
1.1 deraadt 128: if (p == 0)
1.3 deraadt 129: errx(1, "unknown request: %s", &argv[0][0]);
1.1 deraadt 130: curcmd = p;
131: }
1.21 deraadt 132: argc--;
133: argv++;
1.1 deraadt 134: }
1.24 deraadt 135:
1.21 deraadt 136: signal(SIGINT, sigdie);
137: siginterrupt(SIGINT, 1);
138: signal(SIGQUIT, sigdie);
139: siginterrupt(SIGQUIT, 1);
140: signal(SIGTERM, sigdie);
141: siginterrupt(SIGTERM, 1);
1.29 deraadt 142: signal(SIGTSTP, sigtstp);
143: siginterrupt(SIGTSTP, 1);
1.1 deraadt 144:
145: /*
146: * Initialize display. Load average appears in a one line
147: * window of its own. Current command's display appears in
148: * an overlapping sub-window of stdscr configured by the display
149: * routines to minimize update work by curses.
150: */
1.24 deraadt 151: if (initscr() == NULL) {
1.1 deraadt 152: warnx("couldn't initialize screen");
153: exit(0);
154: }
155:
156: CMDLINE = LINES - 1;
157: wnd = (*curcmd->c_open)();
158: if (wnd == NULL) {
159: warnx("couldn't initialize display");
1.21 deraadt 160: die();
1.1 deraadt 161: }
162: wload = newwin(1, 0, 3, 20);
163: if (wload == NULL) {
164: warnx("couldn't set up load average window");
1.21 deraadt 165: die();
1.1 deraadt 166: }
167: gethostname(hostname, sizeof (hostname));
1.21 deraadt 168: gethz();
1.1 deraadt 169: (*curcmd->c_init)();
170: curcmd->c_flags |= CF_INIT;
171: labels();
172:
173: dellave = 0.0;
174:
1.21 deraadt 175: signal(SIGALRM, sigdisplay);
176: siginterrupt(SIGALRM, 1);
177: signal(SIGWINCH, sigwinch);
178: siginterrupt(SIGWINCH, 1);
179: gotdisplay = 1;
1.1 deraadt 180: noecho();
181: crmode();
182: keyboard();
183: /*NOTREACHED*/
184: }
1.3 deraadt 185:
1.21 deraadt 186: void
1.24 deraadt 187: gethz(void)
1.21 deraadt 188: {
189: struct clockinfo cinf;
190: size_t size = sizeof(cinf);
191: int mib[2];
192:
193: mib[0] = CTL_KERN;
194: mib[1] = KERN_CLOCKRATE;
195: if (sysctl(mib, 2, &cinf, &size, NULL, 0) == -1)
196: return;
197: stathz = cinf.stathz;
198: hz = cinf.hz;
199: }
200:
1.3 deraadt 201: static void
1.24 deraadt 202: usage(void)
1.3 deraadt 203: {
1.30 itojun 204: fprintf(stderr, "usage: systat [-n] [-w wait] [display] [refresh-interval]\n");
1.3 deraadt 205: exit(1);
206: }
207:
1.1 deraadt 208:
209: void
1.24 deraadt 210: labels(void)
1.1 deraadt 211: {
212: if (curcmd->c_flags & CF_LOADAV) {
213: mvaddstr(2, 20,
214: "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
215: mvaddstr(3, 5, "Load Average");
216: }
217: (*curcmd->c_label)();
218: #ifdef notdef
219: mvprintw(21, 25, "CPU usage on %s", hostname);
220: #endif
221: refresh();
222: }
223:
224: void
1.21 deraadt 225: sigdisplay(signo)
1.1 deraadt 226: int signo;
227: {
1.21 deraadt 228: gotdisplay = 1;
229: }
230:
231: void
232: display(void)
233: {
1.17 mpech 234: int i, j;
1.1 deraadt 235:
236: /* Get the load average over the last minute. */
237: (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0]));
238: (*curcmd->c_fetch)();
239: if (curcmd->c_flags & CF_LOADAV) {
240: j = 5.0*avenrun[0] + 0.5;
241: dellave -= avenrun[0];
242: if (dellave >= 0.0)
243: c = '<';
244: else {
245: c = '>';
246: dellave = -dellave;
247: }
1.10 kstailey 248: if (dellave < 0.05)
1.1 deraadt 249: c = '|';
250: dellave = avenrun[0];
1.21 deraadt 251: wmove(wload, 0, 0);
252: wclrtoeol(wload);
1.1 deraadt 253: for (i = (j > 50) ? 50 : j; i > 0; i--)
254: waddch(wload, c);
255: if (j > 50)
256: wprintw(wload, " %4.1f", avenrun[0]);
257: }
258: (*curcmd->c_refresh)();
259: if (curcmd->c_flags & CF_LOADAV)
260: wrefresh(wload);
261: wrefresh(wnd);
262: move(CMDLINE, col);
263: refresh();
264: alarm(naptime);
265: }
266:
267: void
1.24 deraadt 268: load(void)
1.1 deraadt 269: {
270:
271: (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0]));
272: mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
273: avenrun[0], avenrun[1], avenrun[2]);
274: clrtoeol();
275: }
276:
1.21 deraadt 277: volatile sig_atomic_t gotdie;
278: volatile sig_atomic_t gotdisplay;
279: volatile sig_atomic_t gotwinch;
1.29 deraadt 280: volatile sig_atomic_t gottstp;
1.21 deraadt 281:
1.1 deraadt 282: void
1.29 deraadt 283: sigdie(int signo)
1.1 deraadt 284: {
1.21 deraadt 285: gotdie = 1;
1.29 deraadt 286: }
287:
288: void
289: sigtstp(int signo)
290: {
291: gottstp = 1;
1.21 deraadt 292: }
293:
294: void
1.24 deraadt 295: die(void)
1.21 deraadt 296: {
1.13 deraadt 297: if (wnd) {
298: move(CMDLINE, 0);
299: clrtoeol();
300: refresh();
301: endwin();
302: }
1.1 deraadt 303: exit(0);
304: }
1.14 kstailey 305:
306: void
1.24 deraadt 307: sigwinch(int signo)
1.14 kstailey 308: {
1.21 deraadt 309: gotwinch = 1;
1.14 kstailey 310: }
311:
1.1 deraadt 312: void
313: error(const char *fmt, ...)
314: {
315: va_list ap;
316: char buf[255];
317: int oy, ox;
1.23 millert 318:
1.1 deraadt 319: va_start(ap, fmt);
320: if (wnd) {
321: getyx(stdscr, oy, ox);
1.5 deraadt 322: (void) vsnprintf(buf, sizeof buf, fmt, ap);
1.1 deraadt 323: clrtoeol();
324: standout();
325: mvaddstr(CMDLINE, 0, buf);
326: standend();
327: move(oy, ox);
328: refresh();
329: } else {
330: (void) vfprintf(stderr, fmt, ap);
331: fprintf(stderr, "\n");
332: }
333: va_end(ap);
334: }
335:
336: void
1.24 deraadt 337: nlisterr(struct nlist namelist[])
1.1 deraadt 338: {
339: int i, n;
340:
341: n = 0;
342: clear();
343: mvprintw(2, 10, "systat: nlist: can't find following symbols:");
344: for (i = 0;
345: namelist[i].n_name != NULL && *namelist[i].n_name != '\0'; i++)
346: if (namelist[i].n_value == 0)
347: mvprintw(2 + ++n, 10, "%s", namelist[i].n_name);
348: move(CMDLINE, 0);
349: clrtoeol();
350: refresh();
351: endwin();
352: exit(1);
353: }
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