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 (void) setlocale(LC_ALL, ""); 88 89 argc--, argv++; 90 while (argc > 0) { 91 if (argv[0][0] == '-') { 92 struct cmdtab *p; 93 94 p = lookup(&argv[0][1]); 95 if (p == (struct cmdtab *)-1) 96 errx(1, "%s: ambiguous request", &argv[0][1]); 97 if (p == (struct cmdtab *)0) 98 errx(1, "%s: unknown request", &argv[0][1]); 99 curcmd = p; 100 } else { 101 t = strtod(argv[0], NULL) * 1000000.0; 102 if (t > 0 && t < (double)UINT_MAX) 103 delay = (unsigned int)t; 104 } 105 argc--, argv++; 106 } 107 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 108 if (kd != NULL) { 109 /* 110 * Try to actually read something, we may be in a jail, and 111 * have /dev/null opened as /dev/mem. 112 */ 113 if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 || 114 kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) != 115 sizeof(dummy)) { 116 kvm_close(kd); 117 kd = NULL; 118 } 119 } 120 if (kd == NULL) { 121 /* 122 * Maybe we are lacking permissions? Retry, this time with bogus 123 * devices. We can now use sysctl only. 124 */ 125 use_kvm = 0; 126 kd = kvm_openfiles("/dev/null", "/dev/null", "/dev/null", 127 O_RDONLY, errbuf); 128 if (kd == NULL) { 129 error("%s", errbuf); 130 exit(1); 131 } 132 } 133 signal(SIGHUP, die); 134 signal(SIGINT, die); 135 signal(SIGQUIT, die); 136 signal(SIGTERM, die); 137 138 /* 139 * Initialize display. Load average appears in a one line 140 * window of its own. Current command's display appears in 141 * an overlapping sub-window of stdscr configured by the display 142 * routines to minimize update work by curses. 143 */ 144 initscr(); 145 CMDLINE = LINES - 1; 146 wnd = (*curcmd->c_open)(); 147 if (wnd == NULL) { 148 warnx("couldn't initialize display"); 149 die(0); 150 } 151 wload = newwin(1, 0, 1, 20); 152 if (wload == NULL) { 153 warnx("couldn't set up load average window"); 154 die(0); 155 } 156 gethostname(hostname, sizeof (hostname)); 157 size = sizeof(clkinfo); 158 if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0) 159 || size != sizeof(clkinfo)) { 160 error("kern.clockrate"); 161 die(0); 162 } 163 hertz = clkinfo.stathz; 164 (*curcmd->c_init)(); 165 curcmd->c_flags |= CF_INIT; 166 labels(); 167 168 dellave = 0.0; 169 170 display(); 171 noecho(); 172 crmode(); 173 keyboard(); 174 /*NOTREACHED*/ 175 176 return EXIT_SUCCESS; 177 } 178 179 void 180 labels(void) 181 { 182 if (curcmd->c_flags & CF_LOADAV) { 183 mvaddstr(0, 20, 184 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 185 mvaddstr(1, 5, "Load Average"); 186 } 187 (*curcmd->c_label)(); 188 #ifdef notdef 189 mvprintw(21, 25, "CPU usage on %s", hostname); 190 #endif 191 refresh(); 192 } 193 194 void 195 display(void) 196 { 197 int i, j; 198 199 /* Get the load average over the last minute. */ 200 (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])); 201 (*curcmd->c_fetch)(); 202 if (curcmd->c_flags & CF_LOADAV) { 203 j = 5.0*avenrun[0] + 0.5; 204 dellave -= avenrun[0]; 205 if (dellave >= 0.0) 206 c = '<'; 207 else { 208 c = '>'; 209 dellave = -dellave; 210 } 211 if (dellave < 0.1) 212 c = '|'; 213 dellave = avenrun[0]; 214 wmove(wload, 0, 0); wclrtoeol(wload); 215 for (i = (j > 50) ? 50 : j; i > 0; i--) 216 waddch(wload, c); 217 if (j > 50) 218 wprintw(wload, " %4.1f", avenrun[0]); 219 } 220 (*curcmd->c_refresh)(); 221 if (curcmd->c_flags & CF_LOADAV) 222 wrefresh(wload); 223 wrefresh(wnd); 224 move(CMDLINE, col); 225 refresh(); 226 } 227 228 void 229 load(void) 230 { 231 232 (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])); 233 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f", 234 avenrun[0], avenrun[1], avenrun[2]); 235 clrtoeol(); 236 } 237 238 void 239 die(int signo __unused) 240 { 241 move(CMDLINE, 0); 242 clrtoeol(); 243 refresh(); 244 endwin(); 245 exit(0); 246 } 247 248 #include <stdarg.h> 249 250 void 251 error(const char *fmt, ...) 252 { 253 va_list ap; 254 char buf[255]; 255 int oy, ox; 256 257 va_start(ap, fmt); 258 if (wnd) { 259 getyx(stdscr, oy, ox); 260 (void) vsnprintf(buf, sizeof(buf), fmt, ap); 261 clrtoeol(); 262 standout(); 263 mvaddstr(CMDLINE, 0, buf); 264 standend(); 265 move(oy, ox); 266 refresh(); 267 } else { 268 (void) vfprintf(stderr, fmt, ap); 269 fprintf(stderr, "\n"); 270 } 271 va_end(ap); 272 } 273 274 void 275 nlisterr(struct nlist n_list[]) 276 { 277 int i, n; 278 279 n = 0; 280 clear(); 281 mvprintw(2, 10, "systat: nlist: can't find following symbols:"); 282 for (i = 0; 283 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++) 284 if (n_list[i].n_value == 0) 285 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name); 286 move(CMDLINE, 0); 287 clrtoeol(); 288 refresh(); 289 endwin(); 290 exit(1); 291 } 292