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 #include <sys/cdefs.h>
33
34 __FBSDID("$FreeBSD$");
35
36 #ifdef lint
37 static const char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
38 #endif
39
40 #ifndef lint
41 static const char copyright[] =
42 "@(#) Copyright (c) 1980, 1992, 1993\n\
43 The Regents of the University of California. All rights reserved.\n";
44 #endif
45
46 #include <sys/param.h>
47 #include <sys/time.h>
48 #include <sys/sysctl.h>
49 #include <sys/queue.h>
50
51 #include <err.h>
52 #include <limits.h>
53 #include <locale.h>
54 #include <nlist.h>
55 #include <paths.h>
56 #include <signal.h>
57 #include <stdio.h>
58 #include <stdlib.h>
59 #include <string.h>
60 #include <unistd.h>
61
62 #include "systat.h"
63 #include "extern.h"
64
65 static int dellave;
66
67 kvm_t *kd;
68 sig_t sigtstpdfl;
69 double avenrun[3];
70 int col;
71 unsigned int delay = 5000000; /* in microseconds */
72 int verbose = 1; /* to report kvm read errs */
73 struct clockinfo clkinfo;
74 double hertz;
75 char c;
76 char *namp;
77 char hostname[MAXHOSTNAMELEN];
78 WINDOW *wnd;
79 int CMDLINE;
80 int use_kvm = 1;
81
82 static WINDOW *wload; /* one line window for load average */
83
84 struct cmdentry {
85 SLIST_ENTRY(cmdentry) link;
86 char *cmd; /* Command name */
87 char *argv; /* Arguments vector for a command */
88 };
89 SLIST_HEAD(, cmdentry) commands;
90
91 static void
parse_cmd_args(int argc,char ** argv)92 parse_cmd_args (int argc, char **argv)
93 {
94 int in_command = 0;
95 struct cmdentry *cmd = NULL;
96 double t;
97
98 while (argc) {
99 if (argv[0][0] == '-') {
100 if (in_command)
101 SLIST_INSERT_HEAD(&commands, cmd, link);
102
103 if (memcmp(argv[0], "--", 3) == 0) {
104 in_command = 0; /*-- ends a command explicitly*/
105 argc --, argv ++;
106 continue;
107 }
108 cmd = calloc(1, sizeof(struct cmdentry));
109 if (cmd == NULL)
110 errx(1, "memory allocating failure");
111 cmd->cmd = strdup(&argv[0][1]);
112 if (cmd->cmd == NULL)
113 errx(1, "memory allocating failure");
114 in_command = 1;
115 }
116 else if (!in_command) {
117 t = strtod(argv[0], NULL) * 1000000.0;
118 if (t > 0 && t < (double)UINT_MAX)
119 delay = (unsigned int)t;
120 }
121 else if (cmd != NULL) {
122 cmd->argv = strdup(argv[0]);
123 if (cmd->argv == NULL)
124 errx(1, "memory allocating failure");
125 in_command = 0;
126 SLIST_INSERT_HEAD(&commands, cmd, link);
127 }
128 else
129 errx(1, "invalid arguments list");
130
131 argc--, argv++;
132 }
133 if (in_command && cmd != NULL)
134 SLIST_INSERT_HEAD(&commands, cmd, link);
135
136 }
137
138 static void
resize(int signo __unused)139 resize(int signo __unused)
140 {
141
142 endwin();
143 refresh();
144 clear();
145
146 CMDLINE = LINES - 1;
147 labels();
148 display();
149 status();
150 }
151
152
153 int
main(int argc,char ** argv)154 main(int argc, char **argv)
155 {
156 char errbuf[_POSIX2_LINE_MAX], dummy;
157 size_t size;
158 struct cmdentry *cmd = NULL;
159
160 (void) setlocale(LC_ALL, "");
161
162 SLIST_INIT(&commands);
163 argc--, argv++;
164 if (argc > 0) {
165 if (argv[0][0] == '-') {
166 struct cmdtab *p;
167
168 p = lookup(&argv[0][1]);
169 if (p == (struct cmdtab *)-1)
170 errx(1, "%s: ambiguous request", &argv[0][1]);
171 if (p == (struct cmdtab *)0)
172 errx(1, "%s: unknown request", &argv[0][1]);
173 curcmd = p;
174 argc--, argv++;
175 }
176 parse_cmd_args (argc, argv);
177
178 }
179 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
180 if (kd != NULL) {
181 /*
182 * Try to actually read something, we may be in a jail, and
183 * have /dev/null opened as /dev/mem.
184 */
185 if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 ||
186 kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) !=
187 sizeof(dummy)) {
188 kvm_close(kd);
189 kd = NULL;
190 }
191 }
192 if (kd == NULL) {
193 /*
194 * Maybe we are lacking permissions? Retry, this time with bogus
195 * devices. We can now use sysctl only.
196 */
197 use_kvm = 0;
198 kd = kvm_openfiles(_PATH_DEVNULL, _PATH_DEVNULL, _PATH_DEVNULL,
199 O_RDONLY, errbuf);
200 if (kd == NULL) {
201 error("%s", errbuf);
202 exit(1);
203 }
204 }
205 signal(SIGHUP, die);
206 signal(SIGINT, die);
207 signal(SIGQUIT, die);
208 signal(SIGTERM, die);
209 signal(SIGWINCH, resize);
210
211 /*
212 * Initialize display. Load average appears in a one line
213 * window of its own. Current command's display appears in
214 * an overlapping sub-window of stdscr configured by the display
215 * routines to minimize update work by curses.
216 */
217 initscr();
218 CMDLINE = LINES - 1;
219 wnd = (*curcmd->c_open)();
220 if (wnd == NULL) {
221 warnx("couldn't initialize display");
222 die(0);
223 }
224 wload = newwin(1, 0, 1, 20);
225 if (wload == NULL) {
226 warnx("couldn't set up load average window");
227 die(0);
228 }
229 gethostname(hostname, sizeof (hostname));
230 size = sizeof(clkinfo);
231 if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0)
232 || size != sizeof(clkinfo)) {
233 error("kern.clockrate");
234 die(0);
235 }
236 hertz = clkinfo.stathz;
237 (*curcmd->c_init)();
238 curcmd->c_flags |= CF_INIT;
239 labels();
240
241 if (curcmd->c_cmd != NULL)
242 SLIST_FOREACH (cmd, &commands, link)
243 if (!curcmd->c_cmd(cmd->cmd, cmd->argv))
244 warnx("command is not understood");
245
246 dellave = 0.0;
247 display();
248 noecho();
249 crmode();
250 keyboard();
251 /*NOTREACHED*/
252
253 return EXIT_SUCCESS;
254 }
255
256 void
labels(void)257 labels(void)
258 {
259 if (curcmd->c_flags & CF_LOADAV) {
260 mvaddstr(0, 20,
261 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
262 mvaddstr(1, 5, "Load Average");
263 }
264 if (curcmd->c_flags & CF_ZFSARC) {
265 mvaddstr(0, 20,
266 " Total MFU MRU Anon Hdr L2Hdr Other");
267 mvaddstr(1, 5, "ZFS ARC ");
268 }
269 (*curcmd->c_label)();
270 #ifdef notdef
271 mvprintw(21, 25, "CPU usage on %s", hostname);
272 #endif
273 refresh();
274 }
275
276 void
display(void)277 display(void)
278 {
279 uint64_t arc_stat;
280 int i, j;
281
282 /* Get the load average over the last minute. */
283 (void) getloadavg(avenrun, nitems(avenrun));
284 (*curcmd->c_fetch)();
285 if (curcmd->c_flags & CF_LOADAV) {
286 j = 5.0*avenrun[0] + 0.5;
287 dellave -= avenrun[0];
288 if (dellave >= 0.0)
289 c = '<';
290 else {
291 c = '>';
292 dellave = -dellave;
293 }
294 if (dellave < 0.1)
295 c = '|';
296 dellave = avenrun[0];
297 wmove(wload, 0, 0); wclrtoeol(wload);
298 for (i = MIN(j, 50); i > 0; i--)
299 waddch(wload, c);
300 if (j > 50)
301 wprintw(wload, " %4.1f", avenrun[0]);
302 }
303 if (curcmd->c_flags & CF_ZFSARC) {
304 uint64_t arc[7] = {};
305 size_t size = sizeof(arc[0]);
306 if (sysctlbyname("kstat.zfs.misc.arcstats.size",
307 &arc[0], &size, NULL, 0) == 0 ) {
308 GETSYSCTL("vfs.zfs.mfu_size", arc[1]);
309 GETSYSCTL("vfs.zfs.mru_size", arc[2]);
310 GETSYSCTL("vfs.zfs.anon_size", arc[3]);
311 GETSYSCTL("kstat.zfs.misc.arcstats.hdr_size", arc[4]);
312 GETSYSCTL("kstat.zfs.misc.arcstats.l2_hdr_size", arc[5]);
313 GETSYSCTL("kstat.zfs.misc.arcstats.bonus_size", arc[6]);
314 GETSYSCTL("kstat.zfs.misc.arcstats.dnode_size", arc_stat);
315 arc[6] += arc_stat;
316 GETSYSCTL("kstat.zfs.misc.arcstats.dbuf_size", arc_stat);
317 arc[6] += arc_stat;
318 wmove(wload, 0, 0); wclrtoeol(wload);
319 for (i = 0 ; i < nitems(arc); i++)
320 sysputuint64(wload, 0, i*8+2, 6, arc[i], 0);
321 }
322 }
323 (*curcmd->c_refresh)();
324 if (curcmd->c_flags & (CF_LOADAV |CF_ZFSARC))
325 wrefresh(wload);
326 wrefresh(wnd);
327 move(CMDLINE, col);
328 refresh();
329 }
330
331 void
load(void)332 load(void)
333 {
334
335 (void) getloadavg(avenrun, nitems(avenrun));
336 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
337 avenrun[0], avenrun[1], avenrun[2]);
338 clrtoeol();
339 }
340
341 void
die(int signo __unused)342 die(int signo __unused)
343 {
344 move(CMDLINE, 0);
345 clrtoeol();
346 refresh();
347 endwin();
348 exit(0);
349 }
350
351 #include <stdarg.h>
352
353 void
error(const char * fmt,...)354 error(const char *fmt, ...)
355 {
356 va_list ap;
357 char buf[255];
358 int oy, ox;
359
360 va_start(ap, fmt);
361 if (wnd) {
362 getyx(stdscr, oy, ox);
363 (void) vsnprintf(buf, sizeof(buf), fmt, ap);
364 clrtoeol();
365 standout();
366 mvaddstr(CMDLINE, 0, buf);
367 standend();
368 move(oy, ox);
369 refresh();
370 } else {
371 (void) vfprintf(stderr, fmt, ap);
372 fprintf(stderr, "\n");
373 }
374 va_end(ap);
375 }
376
377 void
nlisterr(struct nlist n_list[])378 nlisterr(struct nlist n_list[])
379 {
380 int i, n;
381
382 n = 0;
383 clear();
384 mvprintw(2, 10, "systat: nlist: can't find following symbols:");
385 for (i = 0;
386 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++)
387 if (n_list[i].n_value == 0)
388 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name);
389 move(CMDLINE, 0);
390 clrtoeol();
391 refresh();
392 endwin();
393 exit(1);
394 }
395