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 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 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 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 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 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 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 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 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 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