1 /* $NetBSD: main.c,v 1.43 2008/07/21 14:19:26 lukem Exp $ */ 2 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 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1980, 1992, 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #if 0 37 static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93"; 38 #endif 39 __RCSID("$NetBSD: main.c,v 1.43 2008/07/21 14:19:26 lukem Exp $"); 40 #endif /* not lint */ 41 42 #include <sys/param.h> 43 44 #include <ctype.h> 45 #include <err.h> 46 #include <limits.h> 47 #include <signal.h> 48 #include <stdarg.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 #include <termios.h> 54 #include <sys/ioctl.h> 55 56 #include "systat.h" 57 #include "extern.h" 58 59 static struct nlist namelist[] = { 60 #define X_FIRST 0 61 #define X_HZ 0 62 { .n_name = "_hz" }, 63 #define X_STATHZ 1 64 { .n_name = "_stathz" }, 65 #define X_MAXSLP 2 66 { .n_name = "_maxslp" }, 67 { .n_name = NULL } 68 }; 69 static int dellave; 70 71 kvm_t *kd; 72 char *memf = NULL; 73 char *nlistf = NULL; 74 sig_t sigtstpdfl; 75 double avenrun[3]; 76 int col; 77 int naptime = 5; 78 int verbose = 1; /* to report kvm read errs */ 79 int hz, stathz, maxslp; 80 char c; 81 char *namp; 82 char hostname[MAXHOSTNAMELEN + 1]; 83 WINDOW *wnd; 84 int CMDLINE; 85 int turns = 2; /* stay how many refresh-turns in 'all' mode? */ 86 int allflag; 87 int allcounter; 88 sig_atomic_t needsredraw = 0; 89 int use_sysctl = 1; 90 91 static WINDOW *wload; /* one line window for load average */ 92 93 static void (*sv_stop_handler)(int); 94 95 static void stop(int); 96 static void usage(void); 97 int main(int, char **); 98 99 gid_t egid; /* XXX needed by initiostat() and initkre() */ 100 101 int 102 main(int argc, char **argv) 103 { 104 int ch; 105 char errbuf[_POSIX2_LINE_MAX]; 106 107 egid = getegid(); 108 (void)setegid(getgid()); 109 110 while ((ch = getopt(argc, argv, "M:N:nw:t:")) != -1) 111 switch(ch) { 112 case 'M': 113 memf = optarg; 114 use_sysctl = 0; 115 break; 116 case 'N': 117 nlistf = optarg; 118 break; 119 case 'n': 120 nflag = !nflag; 121 break; 122 case 'w': 123 if ((naptime = atoi(optarg)) <= 0) 124 errx(1, "interval <= 0."); 125 break; 126 case 't': 127 if ((turns = atoi(optarg)) <= 0) 128 errx(1, "turns <= 0."); 129 break; 130 case '?': 131 default: 132 usage(); 133 } 134 argc -= optind; 135 argv += optind; 136 137 138 for ( ; argc > 0; argc--, argv++) { 139 struct mode *p; 140 int modefound = 0; 141 142 if (isdigit((unsigned char)argv[0][0])) { 143 naptime = atoi(argv[0]); 144 if (naptime <= 0) 145 naptime = 5; 146 continue; 147 } 148 149 for (p = modes; p->c_name ; p++) { 150 if (strstr(p->c_name, argv[0]) == p->c_name) { 151 curmode = p; 152 modefound++; 153 break; 154 } 155 156 if(strstr("all",argv[0]) == "all"){ 157 allcounter=0; 158 allflag=1; 159 } 160 } 161 162 163 if (!modefound && !allflag) 164 error("%s: Unknown command.", argv[0]); 165 } 166 167 /* 168 * Discard setgid privileges. If not the running kernel, we toss 169 * them away totally so that bad guys can't print interesting stuff 170 * from kernel memory, otherwise switch back to kmem for the 171 * duration of the kvm_openfiles() call. 172 */ 173 if (nlistf != NULL || memf != NULL) 174 (void)setgid(getgid()); 175 else 176 (void)setegid(egid); 177 178 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 179 if (kd == NULL) { 180 error("%s", errbuf); 181 exit(1); 182 } 183 184 /* Get rid of privs for now. */ 185 if (nlistf == NULL && memf == NULL) 186 (void)setegid(getgid()); 187 188 if (kvm_nlist(kd, namelist)) { 189 if (nlistf) 190 errx(1, "%s: no namelist", nlistf); 191 else 192 errx(1, "no namelist"); 193 } 194 195 signal(SIGINT, die); 196 signal(SIGQUIT, die); 197 signal(SIGTERM, die); 198 sv_stop_handler = signal(SIGTSTP, stop); 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 if (initscr() == NULL) 207 { 208 warnx("couldn't initialize screen"); 209 exit(0); 210 } 211 212 CMDLINE = LINES - 1; 213 wnd = (*curmode->c_open)(); 214 if (wnd == NULL) { 215 warnx("couldn't initialize display"); 216 die(0); 217 } 218 wload = newwin(1, 0, 3, 20); 219 if (wload == NULL) { 220 warnx("couldn't set up load average window"); 221 die(0); 222 } 223 gethostname(hostname, sizeof (hostname)); 224 hostname[sizeof(hostname) - 1] = '\0'; 225 NREAD(X_HZ, &hz, sizeof hz); 226 NREAD(X_STATHZ, &stathz, sizeof stathz); 227 NREAD(X_MAXSLP, &maxslp, sizeof maxslp); 228 (*curmode->c_init)(); 229 curmode->c_flags |= CF_INIT; 230 labels(); 231 232 dellave = 0.0; 233 234 display(0); 235 noecho(); 236 cbreak(); 237 keyboard(); 238 /*NOTREACHED*/ 239 } 240 241 static void 242 usage(void) 243 { 244 fprintf(stderr, "usage: systat [-n] [-M core] [-N system] [-w wait] " 245 "[-t turns]\n\t\t[display] [refresh-interval]\n"); 246 exit(1); 247 } 248 249 250 void 251 labels(void) 252 { 253 if (curmode->c_flags & CF_LOADAV) { 254 mvaddstr(2, 20, 255 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 256 mvaddstr(3, 5, "Load Average"); 257 } 258 (*curmode->c_label)(); 259 #ifdef notdef 260 mvprintw(21, 25, "CPU usage on %s", hostname); 261 #endif 262 refresh(); 263 } 264 265 void 266 display(int signo) 267 { 268 int j; 269 struct mode *p; 270 271 /* Get the load average over the last minute. */ 272 (void)getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])); 273 (*curmode->c_fetch)(); 274 if (curmode->c_flags & CF_LOADAV) { 275 j = 5.0*avenrun[0] + 0.5; 276 dellave -= avenrun[0]; 277 if (dellave >= 0.0) 278 c = '<'; 279 else { 280 c = '>'; 281 dellave = -dellave; 282 } 283 if (dellave < 0.1) 284 c = '|'; 285 dellave = avenrun[0]; 286 wmove(wload, 0, 0); 287 wclrtoeol(wload); 288 whline(wload, c, (j > 50) ? 50 : j); 289 if (j > 50) 290 wprintw(wload, " %4.1f", avenrun[0]); 291 } 292 (*curmode->c_refresh)(); 293 if (curmode->c_flags & CF_LOADAV) 294 wrefresh(wload); 295 wrefresh(wnd); 296 move(CMDLINE, col); 297 refresh(); 298 299 if (allflag && signo==SIGALRM) { 300 if (allcounter >= turns){ 301 p = curmode; 302 p++; 303 if (p->c_name == NULL) 304 p = modes; 305 switch_mode(p); 306 allcounter=0; 307 } else 308 allcounter++; 309 } 310 311 timeout(naptime * 1000); 312 } 313 314 void 315 redraw(void) 316 { 317 resizeterm(LINES, COLS); 318 CMDLINE = LINES - 1; 319 labels(); 320 321 display(0); 322 needsredraw = 0; 323 } 324 325 static void 326 stop(int signo) 327 { 328 sigset_t set; 329 330 signal(SIGTSTP, sv_stop_handler); 331 /* unblock SIGTSTP */ 332 sigemptyset(&set); 333 sigaddset(&set, SIGTSTP); 334 sigprocmask(SIG_UNBLOCK, &set, NULL); 335 /* stop ourselves */ 336 kill(0, SIGTSTP); 337 /* must have been restarted */ 338 signal(SIGTSTP, stop); 339 needsredraw = signo; 340 } 341 342 void 343 die(int signo) 344 { 345 move(CMDLINE, 0); 346 clrtoeol(); 347 refresh(); 348 endwin(); 349 exit(0); 350 } 351 352 void 353 error(const char *fmt, ...) 354 { 355 va_list ap; 356 char buf[255]; 357 int oy, ox; 358 359 va_start(ap, fmt); 360 361 if (wnd) { 362 getyx(stdscr, oy, ox); 363 (void) vsnprintf(buf, sizeof(buf), fmt, ap); 364 clrtoeol(); 365 standout(); 366 mvaddstr(CMDLINE, 0, buf); 367 standend(); 368 move(oy, ox); 369 refresh(); 370 } else { 371 (void) vfprintf(stderr, fmt, ap); 372 fprintf(stderr, "\n"); 373 } 374 va_end(ap); 375 } 376 377 void 378 nlisterr(struct nlist name_list[]) 379 { 380 int i, n; 381 382 n = 0; 383 clear(); 384 mvprintw(2, 10, "systat: nlist: can't find following symbols:"); 385 for (i = 0; 386 name_list[i].n_name != NULL && *name_list[i].n_name != '\0'; i++) 387 if (name_list[i].n_value == 0) 388 mvprintw(2 + ++n, 10, "%s", name_list[i].n_name); 389 move(CMDLINE, 0); 390 clrtoeol(); 391 refresh(); 392 sleep(5); 393 endwin(); 394 exit(1); 395 } 396