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(int argc, char **argv) 86 { 87 char errbuf[_POSIX2_LINE_MAX], dummy; 88 size_t size; 89 90 (void) setlocale(LC_TIME, ""); 91 92 argc--, argv++; 93 while (argc > 0) { 94 if (argv[0][0] == '-') { 95 struct cmdtab *p; 96 97 p = lookup(&argv[0][1]); 98 if (p == (struct cmdtab *)-1) 99 errx(1, "%s: ambiguous request", &argv[0][1]); 100 if (p == (struct cmdtab *)0) 101 errx(1, "%s: unknown request", &argv[0][1]); 102 curcmd = p; 103 } else { 104 naptime = atoi(argv[0]); 105 if (naptime <= 0) 106 naptime = 5; 107 } 108 argc--, argv++; 109 } 110 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 111 if (kd != NULL) { 112 /* 113 * Try to actually read something, we may be in a jail, and 114 * have /dev/null opened as /dev/mem. 115 */ 116 if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 || 117 kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) != 118 sizeof(dummy)) { 119 kvm_close(kd); 120 kd = NULL; 121 } 122 } 123 if (kd == NULL) { 124 /* 125 * Maybe we are lacking permissions? Retry, this time with bogus 126 * devices. We can now use sysctl only. 127 */ 128 use_kvm = 0; 129 kd = kvm_openfiles("/dev/null", "/dev/null", "/dev/null", 130 O_RDONLY, errbuf); 131 if (kd == NULL) { 132 error("%s", errbuf); 133 exit(1); 134 } 135 } 136 signal(SIGINT, die); 137 signal(SIGQUIT, die); 138 signal(SIGTERM, die); 139 140 /* 141 * Initialize display. Load average appears in a one line 142 * window of its own. Current command's display appears in 143 * an overlapping sub-window of stdscr configured by the display 144 * routines to minimize update work by curses. 145 */ 146 initscr(); 147 CMDLINE = LINES - 1; 148 wnd = (*curcmd->c_open)(); 149 if (wnd == NULL) { 150 warnx("couldn't initialize display"); 151 die(0); 152 } 153 wload = newwin(1, 0, 1, 20); 154 if (wload == NULL) { 155 warnx("couldn't set up load average window"); 156 die(0); 157 } 158 gethostname(hostname, sizeof (hostname)); 159 size = sizeof(clkinfo); 160 if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0) 161 || size != sizeof(clkinfo)) { 162 error("kern.clockrate"); 163 die(0); 164 } 165 hertz = clkinfo.stathz; 166 (*curcmd->c_init)(); 167 curcmd->c_flags |= CF_INIT; 168 labels(); 169 170 dellave = 0.0; 171 172 signal(SIGALRM, display); 173 display(0); 174 noecho(); 175 crmode(); 176 keyboard(); 177 /*NOTREACHED*/ 178 179 return EXIT_SUCCESS; 180 } 181 182 void 183 labels(void) 184 { 185 if (curcmd->c_flags & CF_LOADAV) { 186 mvaddstr(0, 20, 187 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 188 mvaddstr(1, 5, "Load Average"); 189 } 190 (*curcmd->c_label)(); 191 #ifdef notdef 192 mvprintw(21, 25, "CPU usage on %s", hostname); 193 #endif 194 refresh(); 195 } 196 197 void 198 display(int signo __unused) 199 { 200 int i, j; 201 202 /* Get the load average over the last minute. */ 203 (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])); 204 (*curcmd->c_fetch)(); 205 if (curcmd->c_flags & CF_LOADAV) { 206 j = 5.0*avenrun[0] + 0.5; 207 dellave -= avenrun[0]; 208 if (dellave >= 0.0) 209 c = '<'; 210 else { 211 c = '>'; 212 dellave = -dellave; 213 } 214 if (dellave < 0.1) 215 c = '|'; 216 dellave = avenrun[0]; 217 wmove(wload, 0, 0); wclrtoeol(wload); 218 for (i = (j > 50) ? 50 : j; i > 0; i--) 219 waddch(wload, c); 220 if (j > 50) 221 wprintw(wload, " %4.1f", avenrun[0]); 222 } 223 (*curcmd->c_refresh)(); 224 if (curcmd->c_flags & CF_LOADAV) 225 wrefresh(wload); 226 wrefresh(wnd); 227 move(CMDLINE, col); 228 refresh(); 229 alarm(naptime); 230 } 231 232 void 233 load(void) 234 { 235 236 (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])); 237 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f", 238 avenrun[0], avenrun[1], avenrun[2]); 239 clrtoeol(); 240 } 241 242 void 243 die(int signo __unused) 244 { 245 move(CMDLINE, 0); 246 clrtoeol(); 247 refresh(); 248 endwin(); 249 exit(0); 250 } 251 252 #include <stdarg.h> 253 254 void 255 error(const char *fmt, ...) 256 { 257 va_list ap; 258 char buf[255]; 259 int oy, ox; 260 261 va_start(ap, fmt); 262 if (wnd) { 263 getyx(stdscr, oy, ox); 264 (void) vsnprintf(buf, sizeof(buf), fmt, ap); 265 clrtoeol(); 266 standout(); 267 mvaddstr(CMDLINE, 0, buf); 268 standend(); 269 move(oy, ox); 270 refresh(); 271 } else { 272 (void) vfprintf(stderr, fmt, ap); 273 fprintf(stderr, "\n"); 274 } 275 va_end(ap); 276 } 277 278 void 279 nlisterr(struct nlist n_list[]) 280 { 281 int i, n; 282 283 n = 0; 284 clear(); 285 mvprintw(2, 10, "systat: nlist: can't find following symbols:"); 286 for (i = 0; 287 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++) 288 if (n_list[i].n_value == 0) 289 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name); 290 move(CMDLINE, 0); 291 clrtoeol(); 292 refresh(); 293 endwin(); 294 exit(1); 295 } 296