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 48 #include <err.h> 49 #include <limits.h> 50 #include <locale.h> 51 #include <nlist.h> 52 #include <paths.h> 53 #include <signal.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <unistd.h> 57 58 #include "systat.h" 59 #include "extern.h" 60 61 static int dellave; 62 63 kvm_t *kd; 64 sig_t sigtstpdfl; 65 double avenrun[3]; 66 int col; 67 unsigned int delay = 5000000; /* in microseconds */ 68 int verbose = 1; /* to report kvm read errs */ 69 struct clockinfo clkinfo; 70 double hertz; 71 char c; 72 char *namp; 73 char hostname[MAXHOSTNAMELEN]; 74 WINDOW *wnd; 75 int CMDLINE; 76 int use_kvm = 1; 77 78 static WINDOW *wload; /* one line window for load average */ 79 80 int 81 main(int argc, char **argv) 82 { 83 char errbuf[_POSIX2_LINE_MAX], dummy; 84 size_t size; 85 double t; 86 87 #ifdef USE_WIDECHAR 88 (void) setlocale(LC_ALL, ""); 89 #else 90 (void) setlocale(LC_TIME, ""); 91 #endif 92 93 argc--, argv++; 94 while (argc > 0) { 95 if (argv[0][0] == '-') { 96 struct cmdtab *p; 97 98 p = lookup(&argv[0][1]); 99 if (p == (struct cmdtab *)-1) 100 errx(1, "%s: ambiguous request", &argv[0][1]); 101 if (p == (struct cmdtab *)0) 102 errx(1, "%s: unknown request", &argv[0][1]); 103 curcmd = p; 104 } else { 105 t = strtod(argv[0], NULL) * 1000000.0; 106 if (t > 0 && t < (double)UINT_MAX) 107 delay = (unsigned int)t; 108 } 109 argc--, argv++; 110 } 111 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 112 if (kd != NULL) { 113 /* 114 * Try to actually read something, we may be in a jail, and 115 * have /dev/null opened as /dev/mem. 116 */ 117 if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 || 118 kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) != 119 sizeof(dummy)) { 120 kvm_close(kd); 121 kd = NULL; 122 } 123 } 124 if (kd == NULL) { 125 /* 126 * Maybe we are lacking permissions? Retry, this time with bogus 127 * devices. We can now use sysctl only. 128 */ 129 use_kvm = 0; 130 kd = kvm_openfiles("/dev/null", "/dev/null", "/dev/null", 131 O_RDONLY, errbuf); 132 if (kd == NULL) { 133 error("%s", errbuf); 134 exit(1); 135 } 136 } 137 signal(SIGHUP, die); 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, 1, 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 display(); 175 noecho(); 176 crmode(); 177 keyboard(); 178 /*NOTREACHED*/ 179 180 return EXIT_SUCCESS; 181 } 182 183 void 184 labels(void) 185 { 186 if (curcmd->c_flags & CF_LOADAV) { 187 mvaddstr(0, 20, 188 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 189 mvaddstr(1, 5, "Load Average"); 190 } 191 (*curcmd->c_label)(); 192 #ifdef notdef 193 mvprintw(21, 25, "CPU usage on %s", hostname); 194 #endif 195 refresh(); 196 } 197 198 void 199 display(void) 200 { 201 int i, j; 202 203 /* Get the load average over the last minute. */ 204 (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])); 205 (*curcmd->c_fetch)(); 206 if (curcmd->c_flags & CF_LOADAV) { 207 j = 5.0*avenrun[0] + 0.5; 208 dellave -= avenrun[0]; 209 if (dellave >= 0.0) 210 c = '<'; 211 else { 212 c = '>'; 213 dellave = -dellave; 214 } 215 if (dellave < 0.1) 216 c = '|'; 217 dellave = avenrun[0]; 218 wmove(wload, 0, 0); wclrtoeol(wload); 219 for (i = (j > 50) ? 50 : j; i > 0; i--) 220 waddch(wload, c); 221 if (j > 50) 222 wprintw(wload, " %4.1f", avenrun[0]); 223 } 224 (*curcmd->c_refresh)(); 225 if (curcmd->c_flags & CF_LOADAV) 226 wrefresh(wload); 227 wrefresh(wnd); 228 move(CMDLINE, col); 229 refresh(); 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