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