1 /*- 2 * Copyright (c) 1980, 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 32 __FBSDID("$FreeBSD$"); 33 34 #ifdef lint 35 static const char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93"; 36 #endif 37 38 #ifndef lint 39 static const char copyright[] = 40 "@(#) Copyright (c) 1980, 1992, 1993\n\ 41 The Regents of the University of California. All rights reserved.\n"; 42 #endif 43 44 #include <sys/param.h> 45 #include <sys/time.h> 46 #include <sys/sysctl.h> 47 #include <sys/queue.h> 48 49 #include <err.h> 50 #include <limits.h> 51 #include <locale.h> 52 #include <nlist.h> 53 #include <paths.h> 54 #include <signal.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 60 #include "systat.h" 61 #include "extern.h" 62 63 static int dellave; 64 65 kvm_t *kd; 66 sig_t sigtstpdfl; 67 double avenrun[3]; 68 int col; 69 unsigned int delay = 5000000; /* in microseconds */ 70 int verbose = 1; /* to report kvm read errs */ 71 struct clockinfo clkinfo; 72 double hertz; 73 char c; 74 char *namp; 75 char hostname[MAXHOSTNAMELEN]; 76 WINDOW *wnd; 77 int CMDLINE; 78 int use_kvm = 1; 79 80 static WINDOW *wload; /* one line window for load average */ 81 82 struct cmdentry { 83 SLIST_ENTRY(cmdentry) link; 84 char *cmd; /* Command name */ 85 char *argv; /* Arguments vector for a command */ 86 }; 87 SLIST_HEAD(, cmdentry) commands; 88 89 static void 90 parse_cmd_args (int argc, char **argv) 91 { 92 int in_command = 0; 93 struct cmdentry *cmd = NULL; 94 double t; 95 96 while (argc) { 97 if (argv[0][0] == '-') { 98 if (in_command) 99 SLIST_INSERT_HEAD(&commands, cmd, link); 100 101 if (memcmp(argv[0], "--", 3) == 0) { 102 in_command = 0; /*-- ends a command explicitly*/ 103 argc --, argv ++; 104 continue; 105 } 106 cmd = calloc(1, sizeof(struct cmdentry)); 107 if (cmd == NULL) 108 errx(1, "memory allocating failure"); 109 cmd->cmd = strdup(&argv[0][1]); 110 if (cmd->cmd == NULL) 111 errx(1, "memory allocating failure"); 112 in_command = 1; 113 } 114 else if (!in_command) { 115 t = strtod(argv[0], NULL) * 1000000.0; 116 if (t > 0 && t < (double)UINT_MAX) 117 delay = (unsigned int)t; 118 } 119 else if (cmd != NULL) { 120 cmd->argv = strdup(argv[0]); 121 if (cmd->argv == NULL) 122 errx(1, "memory allocating failure"); 123 in_command = 0; 124 SLIST_INSERT_HEAD(&commands, cmd, link); 125 } 126 else 127 errx(1, "invalid arguments list"); 128 129 argc--, argv++; 130 } 131 if (in_command && cmd != NULL) 132 SLIST_INSERT_HEAD(&commands, cmd, link); 133 134 } 135 136 int 137 main(int argc, char **argv) 138 { 139 char errbuf[_POSIX2_LINE_MAX], dummy; 140 size_t size; 141 struct cmdentry *cmd = NULL; 142 143 (void) setlocale(LC_ALL, ""); 144 145 SLIST_INIT(&commands); 146 argc--, argv++; 147 if (argc > 0) { 148 if (argv[0][0] == '-') { 149 struct cmdtab *p; 150 151 p = lookup(&argv[0][1]); 152 if (p == (struct cmdtab *)-1) 153 errx(1, "%s: ambiguous request", &argv[0][1]); 154 if (p == (struct cmdtab *)0) 155 errx(1, "%s: unknown request", &argv[0][1]); 156 curcmd = p; 157 argc--, argv++; 158 } 159 parse_cmd_args (argc, argv); 160 161 } 162 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 163 if (kd != NULL) { 164 /* 165 * Try to actually read something, we may be in a jail, and 166 * have /dev/null opened as /dev/mem. 167 */ 168 if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 || 169 kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) != 170 sizeof(dummy)) { 171 kvm_close(kd); 172 kd = NULL; 173 } 174 } 175 if (kd == NULL) { 176 /* 177 * Maybe we are lacking permissions? Retry, this time with bogus 178 * devices. We can now use sysctl only. 179 */ 180 use_kvm = 0; 181 kd = kvm_openfiles(_PATH_DEVNULL, _PATH_DEVNULL, _PATH_DEVNULL, 182 O_RDONLY, errbuf); 183 if (kd == NULL) { 184 error("%s", errbuf); 185 exit(1); 186 } 187 } 188 signal(SIGHUP, die); 189 signal(SIGINT, die); 190 signal(SIGQUIT, die); 191 signal(SIGTERM, die); 192 193 /* 194 * Initialize display. Load average appears in a one line 195 * window of its own. Current command's display appears in 196 * an overlapping sub-window of stdscr configured by the display 197 * routines to minimize update work by curses. 198 */ 199 initscr(); 200 CMDLINE = LINES - 1; 201 wnd = (*curcmd->c_open)(); 202 if (wnd == NULL) { 203 warnx("couldn't initialize display"); 204 die(0); 205 } 206 wload = newwin(1, 0, 1, 20); 207 if (wload == NULL) { 208 warnx("couldn't set up load average window"); 209 die(0); 210 } 211 gethostname(hostname, sizeof (hostname)); 212 size = sizeof(clkinfo); 213 if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0) 214 || size != sizeof(clkinfo)) { 215 error("kern.clockrate"); 216 die(0); 217 } 218 hertz = clkinfo.stathz; 219 (*curcmd->c_init)(); 220 curcmd->c_flags |= CF_INIT; 221 labels(); 222 223 if (curcmd->c_cmd != NULL) 224 SLIST_FOREACH (cmd, &commands, link) 225 if (!curcmd->c_cmd(cmd->cmd, cmd->argv)) 226 warnx("command is not understood"); 227 228 dellave = 0.0; 229 display(); 230 noecho(); 231 crmode(); 232 keyboard(); 233 /*NOTREACHED*/ 234 235 return EXIT_SUCCESS; 236 } 237 238 void 239 labels(void) 240 { 241 if (curcmd->c_flags & CF_LOADAV) { 242 mvaddstr(0, 20, 243 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 244 mvaddstr(1, 5, "Load Average"); 245 } 246 if (curcmd->c_flags & CF_ZFSARC) { 247 mvaddstr(0, 20, 248 " Total MFU MRU Anon Hdr L2Hdr Other"); 249 mvaddstr(1, 5, "ZFS ARC "); 250 } 251 (*curcmd->c_label)(); 252 #ifdef notdef 253 mvprintw(21, 25, "CPU usage on %s", hostname); 254 #endif 255 refresh(); 256 } 257 258 void 259 display(void) 260 { 261 int i, j; 262 263 /* Get the load average over the last minute. */ 264 (void) getloadavg(avenrun, nitems(avenrun)); 265 (*curcmd->c_fetch)(); 266 if (curcmd->c_flags & CF_LOADAV) { 267 j = 5.0*avenrun[0] + 0.5; 268 dellave -= avenrun[0]; 269 if (dellave >= 0.0) 270 c = '<'; 271 else { 272 c = '>'; 273 dellave = -dellave; 274 } 275 if (dellave < 0.1) 276 c = '|'; 277 dellave = avenrun[0]; 278 wmove(wload, 0, 0); wclrtoeol(wload); 279 for (i = MIN(j, 50); i > 0; i--) 280 waddch(wload, c); 281 if (j > 50) 282 wprintw(wload, " %4.1f", avenrun[0]); 283 } 284 if (curcmd->c_flags & CF_ZFSARC) { 285 uint64_t arc[7] = {}; 286 size_t size = sizeof(arc[0]); 287 if (sysctlbyname("kstat.zfs.misc.arcstats.size", 288 &arc[0], &size, NULL, 0) == 0 ) { 289 GETSYSCTL("vfs.zfs.mfu_size", arc[1]); 290 GETSYSCTL("vfs.zfs.mru_size", arc[2]); 291 GETSYSCTL("vfs.zfs.anon_size", arc[3]); 292 GETSYSCTL("kstat.zfs.misc.arcstats.hdr_size", arc[4]); 293 GETSYSCTL("kstat.zfs.misc.arcstats.l2_hdr_size", arc[5]); 294 GETSYSCTL("kstat.zfs.misc.arcstats.other_size", arc[6]); 295 wmove(wload, 0, 0); wclrtoeol(wload); 296 for (i = 0 ; i < nitems(arc); i++) { 297 if (arc[i] > 10llu * 1024 * 1024 * 1024 ) { 298 wprintw(wload, "%7lluG", arc[i] >> 30); 299 } 300 else if (arc[i] > 10 * 1024 * 1024 ) { 301 wprintw(wload, "%7lluM", arc[i] >> 20); 302 } 303 else { 304 wprintw(wload, "%7lluK", arc[i] >> 10); 305 } 306 } 307 } 308 } 309 (*curcmd->c_refresh)(); 310 if (curcmd->c_flags & (CF_LOADAV |CF_ZFSARC)) 311 wrefresh(wload); 312 wrefresh(wnd); 313 move(CMDLINE, col); 314 refresh(); 315 } 316 317 void 318 load(void) 319 { 320 321 (void) getloadavg(avenrun, nitems(avenrun)); 322 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f", 323 avenrun[0], avenrun[1], avenrun[2]); 324 clrtoeol(); 325 } 326 327 void 328 die(int signo __unused) 329 { 330 move(CMDLINE, 0); 331 clrtoeol(); 332 refresh(); 333 endwin(); 334 exit(0); 335 } 336 337 #include <stdarg.h> 338 339 void 340 error(const char *fmt, ...) 341 { 342 va_list ap; 343 char buf[255]; 344 int oy, ox; 345 346 va_start(ap, fmt); 347 if (wnd) { 348 getyx(stdscr, oy, ox); 349 (void) vsnprintf(buf, sizeof(buf), fmt, ap); 350 clrtoeol(); 351 standout(); 352 mvaddstr(CMDLINE, 0, buf); 353 standend(); 354 move(oy, ox); 355 refresh(); 356 } else { 357 (void) vfprintf(stderr, fmt, ap); 358 fprintf(stderr, "\n"); 359 } 360 va_end(ap); 361 } 362 363 void 364 nlisterr(struct nlist n_list[]) 365 { 366 int i, n; 367 368 n = 0; 369 clear(); 370 mvprintw(2, 10, "systat: nlist: can't find following symbols:"); 371 for (i = 0; 372 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++) 373 if (n_list[i].n_value == 0) 374 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name); 375 move(CMDLINE, 0); 376 clrtoeol(); 377 refresh(); 378 endwin(); 379 exit(1); 380 } 381