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