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 int
main(int argc,char ** argv)139 main(int argc, char **argv)
140 {
141 char errbuf[_POSIX2_LINE_MAX], dummy;
142 size_t size;
143 struct cmdentry *cmd = NULL;
144
145 (void) setlocale(LC_ALL, "");
146
147 SLIST_INIT(&commands);
148 argc--, argv++;
149 if (argc > 0) {
150 if (argv[0][0] == '-') {
151 struct cmdtab *p;
152
153 p = lookup(&argv[0][1]);
154 if (p == (struct cmdtab *)-1)
155 errx(1, "%s: ambiguous request", &argv[0][1]);
156 if (p == (struct cmdtab *)0)
157 errx(1, "%s: unknown request", &argv[0][1]);
158 curcmd = p;
159 argc--, argv++;
160 }
161 parse_cmd_args (argc, argv);
162
163 }
164 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
165 if (kd != NULL) {
166 /*
167 * Try to actually read something, we may be in a jail, and
168 * have /dev/null opened as /dev/mem.
169 */
170 if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 ||
171 kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) !=
172 sizeof(dummy)) {
173 kvm_close(kd);
174 kd = NULL;
175 }
176 }
177 if (kd == NULL) {
178 /*
179 * Maybe we are lacking permissions? Retry, this time with bogus
180 * devices. We can now use sysctl only.
181 */
182 use_kvm = 0;
183 kd = kvm_openfiles(_PATH_DEVNULL, _PATH_DEVNULL, _PATH_DEVNULL,
184 O_RDONLY, errbuf);
185 if (kd == NULL) {
186 error("%s", errbuf);
187 exit(1);
188 }
189 }
190 signal(SIGHUP, die);
191 signal(SIGINT, die);
192 signal(SIGQUIT, die);
193 signal(SIGTERM, die);
194
195 /*
196 * Initialize display. Load average appears in a one line
197 * window of its own. Current command's display appears in
198 * an overlapping sub-window of stdscr configured by the display
199 * routines to minimize update work by curses.
200 */
201 initscr();
202 CMDLINE = LINES - 1;
203 wnd = (*curcmd->c_open)();
204 if (wnd == NULL) {
205 warnx("couldn't initialize display");
206 die(0);
207 }
208 wload = newwin(1, 0, 1, 20);
209 if (wload == NULL) {
210 warnx("couldn't set up load average window");
211 die(0);
212 }
213 gethostname(hostname, sizeof (hostname));
214 size = sizeof(clkinfo);
215 if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0)
216 || size != sizeof(clkinfo)) {
217 error("kern.clockrate");
218 die(0);
219 }
220 hertz = clkinfo.stathz;
221 (*curcmd->c_init)();
222 curcmd->c_flags |= CF_INIT;
223 labels();
224
225 if (curcmd->c_cmd != NULL)
226 SLIST_FOREACH (cmd, &commands, link)
227 if (!curcmd->c_cmd(cmd->cmd, cmd->argv))
228 warnx("command is not understood");
229
230 dellave = 0.0;
231 display();
232 noecho();
233 crmode();
234 keyboard();
235 /*NOTREACHED*/
236
237 return EXIT_SUCCESS;
238 }
239
240 void
labels(void)241 labels(void)
242 {
243 if (curcmd->c_flags & CF_LOADAV) {
244 mvaddstr(0, 20,
245 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
246 mvaddstr(1, 5, "Load Average");
247 }
248 if (curcmd->c_flags & CF_ZFSARC) {
249 mvaddstr(0, 20,
250 " Total MFU MRU Anon Hdr L2Hdr Other");
251 mvaddstr(1, 5, "ZFS ARC ");
252 }
253 (*curcmd->c_label)();
254 #ifdef notdef
255 mvprintw(21, 25, "CPU usage on %s", hostname);
256 #endif
257 refresh();
258 }
259
260 void
display(void)261 display(void)
262 {
263 uint64_t arc_stat;
264 int i, j;
265
266 /* Get the load average over the last minute. */
267 (void) getloadavg(avenrun, nitems(avenrun));
268 (*curcmd->c_fetch)();
269 if (curcmd->c_flags & CF_LOADAV) {
270 j = 5.0*avenrun[0] + 0.5;
271 dellave -= avenrun[0];
272 if (dellave >= 0.0)
273 c = '<';
274 else {
275 c = '>';
276 dellave = -dellave;
277 }
278 if (dellave < 0.1)
279 c = '|';
280 dellave = avenrun[0];
281 wmove(wload, 0, 0); wclrtoeol(wload);
282 for (i = MIN(j, 50); i > 0; i--)
283 waddch(wload, c);
284 if (j > 50)
285 wprintw(wload, " %4.1f", avenrun[0]);
286 }
287 if (curcmd->c_flags & CF_ZFSARC) {
288 uint64_t arc[7] = {};
289 size_t size = sizeof(arc[0]);
290 if (sysctlbyname("kstat.zfs.misc.arcstats.size",
291 &arc[0], &size, NULL, 0) == 0 ) {
292 GETSYSCTL("vfs.zfs.mfu_size", arc[1]);
293 GETSYSCTL("vfs.zfs.mru_size", arc[2]);
294 GETSYSCTL("vfs.zfs.anon_size", arc[3]);
295 GETSYSCTL("kstat.zfs.misc.arcstats.hdr_size", arc[4]);
296 GETSYSCTL("kstat.zfs.misc.arcstats.l2_hdr_size", arc[5]);
297 GETSYSCTL("kstat.zfs.misc.arcstats.bonus_size", arc[6]);
298 GETSYSCTL("kstat.zfs.misc.arcstats.dnode_size", arc_stat);
299 arc[6] += arc_stat;
300 GETSYSCTL("kstat.zfs.misc.arcstats.dbuf_size", arc_stat);
301 arc[6] += arc_stat;
302 wmove(wload, 0, 0); wclrtoeol(wload);
303 for (i = 0 ; i < nitems(arc); i++) {
304 if (arc[i] > 10llu * 1024 * 1024 * 1024 ) {
305 wprintw(wload, "%7lluG", arc[i] >> 30);
306 }
307 else if (arc[i] > 10 * 1024 * 1024 ) {
308 wprintw(wload, "%7lluM", arc[i] >> 20);
309 }
310 else {
311 wprintw(wload, "%7lluK", arc[i] >> 10);
312 }
313 }
314 }
315 }
316 (*curcmd->c_refresh)();
317 if (curcmd->c_flags & (CF_LOADAV |CF_ZFSARC))
318 wrefresh(wload);
319 wrefresh(wnd);
320 move(CMDLINE, col);
321 refresh();
322 }
323
324 void
load(void)325 load(void)
326 {
327
328 (void) getloadavg(avenrun, nitems(avenrun));
329 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
330 avenrun[0], avenrun[1], avenrun[2]);
331 clrtoeol();
332 }
333
334 void
die(int signo __unused)335 die(int signo __unused)
336 {
337 move(CMDLINE, 0);
338 clrtoeol();
339 refresh();
340 endwin();
341 exit(0);
342 }
343
344 #include <stdarg.h>
345
346 void
error(const char * fmt,...)347 error(const char *fmt, ...)
348 {
349 va_list ap;
350 char buf[255];
351 int oy, ox;
352
353 va_start(ap, fmt);
354 if (wnd) {
355 getyx(stdscr, oy, ox);
356 (void) vsnprintf(buf, sizeof(buf), fmt, ap);
357 clrtoeol();
358 standout();
359 mvaddstr(CMDLINE, 0, buf);
360 standend();
361 move(oy, ox);
362 refresh();
363 } else {
364 (void) vfprintf(stderr, fmt, ap);
365 fprintf(stderr, "\n");
366 }
367 va_end(ap);
368 }
369
370 void
nlisterr(struct nlist n_list[])371 nlisterr(struct nlist n_list[])
372 {
373 int i, n;
374
375 n = 0;
376 clear();
377 mvprintw(2, 10, "systat: nlist: can't find following symbols:");
378 for (i = 0;
379 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++)
380 if (n_list[i].n_value == 0)
381 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name);
382 move(CMDLINE, 0);
383 clrtoeol();
384 refresh();
385 endwin();
386 exit(1);
387 }
388