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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 36 __FBSDID("$FreeBSD$"); 37 38 #ifdef lint 39 static const char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93"; 40 #endif 41 42 #ifndef lint 43 static const char copyright[] = 44 "@(#) Copyright (c) 1980, 1992, 1993\n\ 45 The Regents of the University of California. All rights reserved.\n"; 46 #endif 47 48 #include <sys/param.h> 49 #include <sys/time.h> 50 #include <sys/sysctl.h> 51 52 #include <err.h> 53 #include <limits.h> 54 #include <locale.h> 55 #include <nlist.h> 56 #include <paths.h> 57 #include <signal.h> 58 #include <stdio.h> 59 #include <stdlib.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 int naptime = 5; 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 int 85 main(argc, argv) 86 int argc; 87 char **argv; 88 { 89 char errbuf[_POSIX2_LINE_MAX], dummy; 90 size_t size; 91 92 (void) setlocale(LC_TIME, ""); 93 94 argc--, argv++; 95 while (argc > 0) { 96 if (argv[0][0] == '-') { 97 struct cmdtab *p; 98 99 p = lookup(&argv[0][1]); 100 if (p == (struct cmdtab *)-1) 101 errx(1, "%s: ambiguous request", &argv[0][1]); 102 if (p == (struct cmdtab *)0) 103 errx(1, "%s: unknown request", &argv[0][1]); 104 curcmd = p; 105 } else { 106 naptime = atoi(argv[0]); 107 if (naptime <= 0) 108 naptime = 5; 109 } 110 argc--, argv++; 111 } 112 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 113 if (kd != NULL) { 114 /* 115 * Try to actually read something, we may be in a jail, and 116 * have /dev/null opened as /dev/mem. 117 */ 118 if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 || 119 kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) != 120 sizeof(dummy)) { 121 kvm_close(kd); 122 kd = NULL; 123 } 124 } 125 if (kd == NULL) { 126 /* 127 * Maybe we are lacking permissions? Retry, this time with bogus 128 * devices. We can now use sysctl only. 129 */ 130 use_kvm = 0; 131 kd = kvm_openfiles("/dev/null", "/dev/null", "/dev/null", 132 O_RDONLY, errbuf); 133 if (kd == NULL) { 134 error("%s", errbuf); 135 exit(1); 136 } 137 } 138 signal(SIGINT, die); 139 signal(SIGQUIT, die); 140 signal(SIGTERM, die); 141 142 /* 143 * Initialize display. Load average appears in a one line 144 * window of its own. Current command's display appears in 145 * an overlapping sub-window of stdscr configured by the display 146 * routines to minimize update work by curses. 147 */ 148 initscr(); 149 CMDLINE = LINES - 1; 150 wnd = (*curcmd->c_open)(); 151 if (wnd == NULL) { 152 warnx("couldn't initialize display"); 153 die(0); 154 } 155 wload = newwin(1, 0, 3, 20); 156 if (wload == NULL) { 157 warnx("couldn't set up load average window"); 158 die(0); 159 } 160 gethostname(hostname, sizeof (hostname)); 161 size = sizeof(clkinfo); 162 if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0) 163 || size != sizeof(clkinfo)) { 164 error("kern.clockrate"); 165 die(0); 166 } 167 hertz = clkinfo.stathz; 168 (*curcmd->c_init)(); 169 curcmd->c_flags |= CF_INIT; 170 labels(); 171 172 dellave = 0.0; 173 174 signal(SIGALRM, display); 175 display(0); 176 noecho(); 177 crmode(); 178 keyboard(); 179 /*NOTREACHED*/ 180 181 return EXIT_SUCCESS; 182 } 183 184 void 185 labels() 186 { 187 if (curcmd->c_flags & CF_LOADAV) { 188 mvaddstr(2, 20, 189 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 190 mvaddstr(3, 5, "Load Average"); 191 } 192 (*curcmd->c_label)(); 193 #ifdef notdef 194 mvprintw(21, 25, "CPU usage on %s", hostname); 195 #endif 196 refresh(); 197 } 198 199 void 200 display(signo) 201 int signo __unused; 202 { 203 int i, j; 204 205 /* Get the load average over the last minute. */ 206 (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])); 207 (*curcmd->c_fetch)(); 208 if (curcmd->c_flags & CF_LOADAV) { 209 j = 5.0*avenrun[0] + 0.5; 210 dellave -= avenrun[0]; 211 if (dellave >= 0.0) 212 c = '<'; 213 else { 214 c = '>'; 215 dellave = -dellave; 216 } 217 if (dellave < 0.1) 218 c = '|'; 219 dellave = avenrun[0]; 220 wmove(wload, 0, 0); wclrtoeol(wload); 221 for (i = (j > 50) ? 50 : j; i > 0; i--) 222 waddch(wload, c); 223 if (j > 50) 224 wprintw(wload, " %4.1f", avenrun[0]); 225 } 226 (*curcmd->c_refresh)(); 227 if (curcmd->c_flags & CF_LOADAV) 228 wrefresh(wload); 229 wrefresh(wnd); 230 move(CMDLINE, col); 231 refresh(); 232 alarm(naptime); 233 } 234 235 void 236 load() 237 { 238 239 (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])); 240 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f", 241 avenrun[0], avenrun[1], avenrun[2]); 242 clrtoeol(); 243 } 244 245 void 246 die(signo) 247 int signo __unused; 248 { 249 move(CMDLINE, 0); 250 clrtoeol(); 251 refresh(); 252 endwin(); 253 exit(0); 254 } 255 256 #include <stdarg.h> 257 258 void 259 error(const char *fmt, ...) 260 { 261 va_list ap; 262 char buf[255]; 263 int oy, ox; 264 265 va_start(ap, fmt); 266 if (wnd) { 267 getyx(stdscr, oy, ox); 268 (void) vsnprintf(buf, sizeof(buf), fmt, ap); 269 clrtoeol(); 270 standout(); 271 mvaddstr(CMDLINE, 0, buf); 272 standend(); 273 move(oy, ox); 274 refresh(); 275 } else { 276 (void) vfprintf(stderr, fmt, ap); 277 fprintf(stderr, "\n"); 278 } 279 va_end(ap); 280 } 281 282 void 283 nlisterr(n_list) 284 struct nlist n_list[]; 285 { 286 int i, n; 287 288 n = 0; 289 clear(); 290 mvprintw(2, 10, "systat: nlist: can't find following symbols:"); 291 for (i = 0; 292 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++) 293 if (n_list[i].n_value == 0) 294 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name); 295 move(CMDLINE, 0); 296 clrtoeol(); 297 refresh(); 298 endwin(); 299 exit(1); 300 } 301