1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32
33 #ifdef lint
34 static const char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
35 #endif
36
37 #include <sys/param.h>
38 #include <sys/time.h>
39 #include <sys/sysctl.h>
40 #include <sys/queue.h>
41
42 #include <err.h>
43 #include <limits.h>
44 #include <locale.h>
45 #include <nlist.h>
46 #include <paths.h>
47 #include <signal.h>
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <string.h>
51 #include <unistd.h>
52
53 #include "systat.h"
54 #include "extern.h"
55
56 static int dellave;
57
58 kvm_t *kd;
59 sig_t sigtstpdfl;
60 double avenrun[3];
61 int col;
62 unsigned int delay = 5000000; /* in microseconds */
63 int verbose = 1; /* to report kvm read errs */
64 struct clockinfo clkinfo;
65 double hertz;
66 char c;
67 char *namp;
68 char hostname[MAXHOSTNAMELEN];
69 WINDOW *wnd;
70 int CMDLINE;
71 int use_kvm = 1;
72
73 static WINDOW *wload; /* one line window for load average */
74
75 struct cmdentry {
76 SLIST_ENTRY(cmdentry) link;
77 char *cmd; /* Command name */
78 char *argv; /* Arguments vector for a command */
79 };
80 SLIST_HEAD(, cmdentry) commands;
81
82 static void
parse_cmd_args(int argc,char ** argv)83 parse_cmd_args (int argc, char **argv)
84 {
85 int in_command = 0;
86 struct cmdentry *cmd = NULL;
87 double t;
88
89 while (argc) {
90 if (argv[0][0] == '-') {
91 if (in_command)
92 SLIST_INSERT_HEAD(&commands, cmd, link);
93
94 if (memcmp(argv[0], "--", 3) == 0) {
95 in_command = 0; /*-- ends a command explicitly*/
96 argc --, argv ++;
97 continue;
98 }
99 cmd = calloc(1, sizeof(struct cmdentry));
100 if (cmd == NULL)
101 errx(1, "memory allocating failure");
102 cmd->cmd = strdup(&argv[0][1]);
103 if (cmd->cmd == NULL)
104 errx(1, "memory allocating failure");
105 in_command = 1;
106 }
107 else if (!in_command) {
108 t = strtod(argv[0], NULL) * 1000000.0;
109 if (t > 0 && t < (double)UINT_MAX)
110 delay = (unsigned int)t;
111 }
112 else if (cmd != NULL) {
113 cmd->argv = strdup(argv[0]);
114 if (cmd->argv == NULL)
115 errx(1, "memory allocating failure");
116 in_command = 0;
117 SLIST_INSERT_HEAD(&commands, cmd, link);
118 }
119 else
120 errx(1, "invalid arguments list");
121
122 argc--, argv++;
123 }
124 if (in_command && cmd != NULL)
125 SLIST_INSERT_HEAD(&commands, cmd, link);
126
127 }
128
129 static void
resize(int signo __unused)130 resize(int signo __unused)
131 {
132
133 endwin();
134 refresh();
135 clear();
136
137 CMDLINE = LINES - 1;
138 labels();
139 display();
140 status();
141 }
142
143
144 int
main(int argc,char ** argv)145 main(int argc, char **argv)
146 {
147 char errbuf[_POSIX2_LINE_MAX], dummy;
148 size_t size;
149 struct cmdentry *cmd = NULL;
150
151 (void) setlocale(LC_ALL, "");
152
153 SLIST_INIT(&commands);
154 argc--, argv++;
155 if (argc > 0) {
156 if (argv[0][0] == '-') {
157 struct cmdtab *p;
158
159 p = lookup(&argv[0][1]);
160 if (p == (struct cmdtab *)-1)
161 errx(1, "%s: ambiguous request", &argv[0][1]);
162 if (p == (struct cmdtab *)0)
163 errx(1, "%s: unknown request", &argv[0][1]);
164 curcmd = p;
165 argc--, argv++;
166 }
167 parse_cmd_args (argc, argv);
168
169 }
170 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
171 if (kd != NULL) {
172 /*
173 * Try to actually read something, we may be in a jail, and
174 * have /dev/null opened as /dev/mem.
175 */
176 if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 ||
177 kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) !=
178 sizeof(dummy)) {
179 kvm_close(kd);
180 kd = NULL;
181 }
182 }
183 if (kd == NULL) {
184 /*
185 * Maybe we are lacking permissions? Retry, this time with bogus
186 * devices. We can now use sysctl only.
187 */
188 use_kvm = 0;
189 kd = kvm_openfiles(_PATH_DEVNULL, _PATH_DEVNULL, _PATH_DEVNULL,
190 O_RDONLY, errbuf);
191 if (kd == NULL) {
192 error("%s", errbuf);
193 exit(1);
194 }
195 }
196 signal(SIGHUP, die);
197 signal(SIGINT, die);
198 signal(SIGQUIT, die);
199 signal(SIGTERM, die);
200 signal(SIGWINCH, resize);
201
202 /*
203 * Initialize display. Load average appears in a one line
204 * window of its own. Current command's display appears in
205 * an overlapping sub-window of stdscr configured by the display
206 * routines to minimize update work by curses.
207 */
208 initscr();
209 CMDLINE = LINES - 1;
210 wnd = (*curcmd->c_open)();
211 if (wnd == NULL) {
212 warnx("couldn't initialize display");
213 die(0);
214 }
215 wload = newwin(1, 0, 1, 20);
216 if (wload == NULL) {
217 warnx("couldn't set up load average window");
218 die(0);
219 }
220 gethostname(hostname, sizeof (hostname));
221 size = sizeof(clkinfo);
222 if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0)
223 || size != sizeof(clkinfo)) {
224 error("kern.clockrate");
225 die(0);
226 }
227 hertz = clkinfo.stathz;
228 (*curcmd->c_init)();
229 curcmd->c_flags |= CF_INIT;
230 labels();
231
232 if (curcmd->c_cmd != NULL)
233 SLIST_FOREACH (cmd, &commands, link)
234 if (!curcmd->c_cmd(cmd->cmd, cmd->argv))
235 warnx("command is not understood");
236
237 dellave = 0.0;
238 display();
239 noecho();
240 crmode();
241 keyboard();
242 /*NOTREACHED*/
243
244 return EXIT_SUCCESS;
245 }
246
247 void
labels(void)248 labels(void)
249 {
250 if (curcmd->c_flags & CF_LOADAV) {
251 mvaddstr(0, 20,
252 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
253 mvaddstr(1, 5, "Load Average");
254 }
255 if (curcmd->c_flags & CF_ZFSARC) {
256 mvaddstr(0, 20,
257 " Total MFU MRU Anon Hdr L2Hdr Other");
258 mvaddstr(1, 5, "ZFS ARC ");
259 }
260 (*curcmd->c_label)();
261 #ifdef notdef
262 mvprintw(21, 25, "CPU usage on %s", hostname);
263 #endif
264 refresh();
265 }
266
267 void
display(void)268 display(void)
269 {
270 uint64_t arc_stat;
271 int i, j;
272
273 /* Get the load average over the last minute. */
274 (void) getloadavg(avenrun, nitems(avenrun));
275 (*curcmd->c_fetch)();
276 if (curcmd->c_flags & CF_LOADAV) {
277 j = 5.0*avenrun[0] + 0.5;
278 dellave -= avenrun[0];
279 if (dellave >= 0.0)
280 c = '<';
281 else {
282 c = '>';
283 dellave = -dellave;
284 }
285 if (dellave < 0.1)
286 c = '|';
287 dellave = avenrun[0];
288 wmove(wload, 0, 0); wclrtoeol(wload);
289 for (i = MIN(j, 50); i > 0; i--)
290 waddch(wload, c);
291 if (j > 50)
292 wprintw(wload, " %4.1f", avenrun[0]);
293 }
294 if (curcmd->c_flags & CF_ZFSARC) {
295 uint64_t arc[7] = {};
296 size_t size = sizeof(arc[0]);
297 if (sysctlbyname("kstat.zfs.misc.arcstats.size",
298 &arc[0], &size, NULL, 0) == 0 ) {
299 GETSYSCTL("vfs.zfs.mfu_size", arc[1]);
300 GETSYSCTL("vfs.zfs.mru_size", arc[2]);
301 GETSYSCTL("vfs.zfs.anon_size", arc[3]);
302 GETSYSCTL("kstat.zfs.misc.arcstats.hdr_size", arc[4]);
303 GETSYSCTL("kstat.zfs.misc.arcstats.l2_hdr_size", arc[5]);
304 GETSYSCTL("kstat.zfs.misc.arcstats.bonus_size", arc[6]);
305 GETSYSCTL("kstat.zfs.misc.arcstats.dnode_size", arc_stat);
306 arc[6] += arc_stat;
307 GETSYSCTL("kstat.zfs.misc.arcstats.dbuf_size", arc_stat);
308 arc[6] += arc_stat;
309 wmove(wload, 0, 0); wclrtoeol(wload);
310 for (i = 0 ; i < nitems(arc); i++)
311 sysputuint64(wload, 0, i*8+2, 6, arc[i], 0);
312 }
313 }
314 (*curcmd->c_refresh)();
315 if (curcmd->c_flags & (CF_LOADAV |CF_ZFSARC))
316 wrefresh(wload);
317 wrefresh(wnd);
318 move(CMDLINE, col);
319 refresh();
320 }
321
322 void
load(void)323 load(void)
324 {
325
326 (void) getloadavg(avenrun, nitems(avenrun));
327 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
328 avenrun[0], avenrun[1], avenrun[2]);
329 clrtoeol();
330 }
331
332 void
die(int signo __unused)333 die(int signo __unused)
334 {
335 move(CMDLINE, 0);
336 clrtoeol();
337 refresh();
338 endwin();
339 exit(0);
340 }
341
342 #include <stdarg.h>
343
344 void
error(const char * fmt,...)345 error(const char *fmt, ...)
346 {
347 va_list ap;
348 char buf[255];
349 int oy, ox;
350
351 va_start(ap, fmt);
352 if (wnd) {
353 getyx(stdscr, oy, ox);
354 (void) vsnprintf(buf, sizeof(buf), fmt, ap);
355 clrtoeol();
356 standout();
357 mvaddstr(CMDLINE, 0, buf);
358 standend();
359 move(oy, ox);
360 refresh();
361 } else {
362 (void) vfprintf(stderr, fmt, ap);
363 fprintf(stderr, "\n");
364 }
365 va_end(ap);
366 }
367
368 void
nlisterr(struct nlist n_list[])369 nlisterr(struct nlist n_list[])
370 {
371 int i, n;
372
373 n = 0;
374 clear();
375 mvprintw(2, 10, "systat: nlist: can't find following symbols:");
376 for (i = 0;
377 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++)
378 if (n_list[i].n_value == 0)
379 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name);
380 move(CMDLINE, 0);
381 clrtoeol();
382 refresh();
383 endwin();
384 exit(1);
385 }
386