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 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1980, 1992, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 50 #include <err.h> 51 #include <locale.h> 52 #include <nlist.h> 53 #include <signal.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <unistd.h> 57 #include "systat.h" 58 #include "extern.h" 59 60 static struct nlist namelist[] = { 61 #define X_FIRST 0 62 #define X_HZ 0 63 { "_hz" }, 64 #define X_STATHZ 1 65 { "_stathz" }, 66 { "" } 67 }; 68 static int dellave; 69 70 kvm_t *kd; 71 sig_t sigtstpdfl; 72 double avenrun[3]; 73 int col; 74 int naptime = 5; 75 int verbose = 1; /* to report kvm read errs */ 76 int hz, stathz; 77 double hertz; 78 char c; 79 char *namp; 80 char hostname[MAXHOSTNAMELEN]; 81 WINDOW *wnd; 82 int CMDLINE; 83 84 static WINDOW *wload; /* one line window for load average */ 85 86 int 87 main(argc, argv) 88 int argc; 89 char **argv; 90 { 91 char errbuf[80]; 92 93 (void) setlocale(LC_TIME, ""); 94 95 argc--, argv++; 96 while (argc > 0) { 97 if (argv[0][0] == '-') { 98 struct cmdtab *p; 99 100 p = lookup(&argv[0][1]); 101 if (p == (struct cmdtab *)-1) 102 errx(1, "%s: ambiguous request", &argv[0][1]); 103 if (p == (struct cmdtab *)0) 104 errx(1, "%s: unknown request", &argv[0][1]); 105 curcmd = p; 106 } else { 107 naptime = atoi(argv[0]); 108 if (naptime <= 0) 109 naptime = 5; 110 } 111 argc--, argv++; 112 } 113 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 114 if (kd == NULL) { 115 error("%s", errbuf); 116 exit(1); 117 } 118 signal(SIGINT, die); 119 signal(SIGQUIT, die); 120 signal(SIGTERM, die); 121 122 /* 123 * Initialize display. Load average appears in a one line 124 * window of its own. Current command's display appears in 125 * an overlapping sub-window of stdscr configured by the display 126 * routines to minimize update work by curses. 127 */ 128 initscr(); 129 CMDLINE = LINES - 1; 130 wnd = (*curcmd->c_open)(); 131 if (wnd == NULL) { 132 warnx("couldn't initialize display"); 133 die(0); 134 } 135 wload = newwin(1, 0, 3, 20); 136 if (wload == NULL) { 137 warnx("couldn't set up load average window"); 138 die(0); 139 } 140 if (kvm_nlist(kd, namelist)) { 141 nlisterr(namelist); 142 exit(1); 143 } 144 if (namelist[X_FIRST].n_type == 0) 145 errx(1, "couldn't read namelist"); 146 gethostname(hostname, sizeof (hostname)); 147 NREAD(X_HZ, &hz, sizeof(hz)); 148 NREAD(X_STATHZ, &stathz, sizeof(stathz)); 149 hertz = stathz ? stathz : hz; 150 (*curcmd->c_init)(); 151 curcmd->c_flags |= CF_INIT; 152 labels(); 153 154 dellave = 0.0; 155 156 signal(SIGALRM, display); 157 display(0); 158 noecho(); 159 crmode(); 160 keyboard(); 161 /*NOTREACHED*/ 162 163 return EXIT_SUCCESS; 164 } 165 166 void 167 labels() 168 { 169 if (curcmd->c_flags & CF_LOADAV) { 170 mvaddstr(2, 20, 171 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 172 mvaddstr(3, 5, "Load Average"); 173 } 174 (*curcmd->c_label)(); 175 #ifdef notdef 176 mvprintw(21, 25, "CPU usage on %s", hostname); 177 #endif 178 refresh(); 179 } 180 181 void 182 display(signo) 183 int signo; 184 { 185 register int i, j; 186 187 /* Get the load average over the last minute. */ 188 (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])); 189 (*curcmd->c_fetch)(); 190 if (curcmd->c_flags & CF_LOADAV) { 191 j = 5.0*avenrun[0] + 0.5; 192 dellave -= avenrun[0]; 193 if (dellave >= 0.0) 194 c = '<'; 195 else { 196 c = '>'; 197 dellave = -dellave; 198 } 199 if (dellave < 0.1) 200 c = '|'; 201 dellave = avenrun[0]; 202 wmove(wload, 0, 0); wclrtoeol(wload); 203 for (i = (j > 50) ? 50 : j; i > 0; i--) 204 waddch(wload, c); 205 if (j > 50) 206 wprintw(wload, " %4.1f", avenrun[0]); 207 } 208 (*curcmd->c_refresh)(); 209 if (curcmd->c_flags & CF_LOADAV) 210 wrefresh(wload); 211 wrefresh(wnd); 212 move(CMDLINE, col); 213 refresh(); 214 alarm(naptime); 215 } 216 217 void 218 load() 219 { 220 221 (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])); 222 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f", 223 avenrun[0], avenrun[1], avenrun[2]); 224 clrtoeol(); 225 } 226 227 void 228 die(signo) 229 int signo; 230 { 231 move(CMDLINE, 0); 232 clrtoeol(); 233 refresh(); 234 endwin(); 235 exit(0); 236 } 237 238 #if __STDC__ 239 #include <stdarg.h> 240 #else 241 #include <varargs.h> 242 #endif 243 244 #if __STDC__ 245 void 246 error(const char *fmt, ...) 247 #else 248 void 249 error(fmt, va_alist) 250 char *fmt; 251 va_dcl 252 #endif 253 { 254 va_list ap; 255 char buf[255]; 256 int oy, ox; 257 #if __STDC__ 258 va_start(ap, fmt); 259 #else 260 va_start(ap); 261 #endif 262 263 if (wnd) { 264 getyx(stdscr, oy, ox); 265 (void) vsnprintf(buf, sizeof(buf), fmt, ap); 266 clrtoeol(); 267 standout(); 268 mvaddstr(CMDLINE, 0, buf); 269 standend(); 270 move(oy, ox); 271 refresh(); 272 } else { 273 (void) vfprintf(stderr, fmt, ap); 274 fprintf(stderr, "\n"); 275 } 276 va_end(ap); 277 } 278 279 void 280 nlisterr(namelist) 281 struct nlist namelist[]; 282 { 283 int i, n; 284 285 n = 0; 286 clear(); 287 mvprintw(2, 10, "systat: nlist: can't find following symbols:"); 288 for (i = 0; 289 namelist[i].n_name != NULL && *namelist[i].n_name != '\0'; i++) 290 if (namelist[i].n_value == 0) 291 mvprintw(2 + ++n, 10, "%s", namelist[i].n_name); 292 move(CMDLINE, 0); 293 clrtoeol(); 294 refresh(); 295 endwin(); 296 exit(1); 297 } 298