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 * @(#) Copyright (c) 1980, 1992, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)main.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.bin/systat/main.c,v 1.11.2.1 2001/06/06 20:26:01 tmm Exp $ 36 * $DragonFly: src/usr.bin/systat/main.c,v 1.5 2003/11/08 09:30:32 asmodai Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/time.h> 41 42 #include <err.h> 43 #include <limits.h> 44 #include <locale.h> 45 #include <nlist.h> 46 #include <signal.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <unistd.h> 50 #include "systat.h" 51 #include "extern.h" 52 53 static struct nlist namelist[] = { 54 #define X_FIRST 0 55 #define X_HZ 0 56 { "_hz" }, 57 #define X_STATHZ 1 58 { "_stathz" }, 59 { "" } 60 }; 61 static int dellave; 62 63 kvm_t *kd; 64 sig_t sigtstpdfl; 65 double avenrun[3]; 66 int col; 67 double naptime = 5.0; 68 int verbose = 1; /* to report kvm read errs */ 69 int hz, stathz; 70 double hertz; 71 char c; 72 char *namp; 73 char hostname[MAXHOSTNAMELEN]; 74 WINDOW *wnd; 75 int CMDLINE; 76 77 static WINDOW *wload; /* one line window for load average */ 78 79 int 80 main(int argc, char **argv) 81 { 82 char errbuf[_POSIX2_LINE_MAX]; 83 84 (void) setlocale(LC_TIME, ""); 85 86 argc--, argv++; 87 while (argc > 0) { 88 if (argv[0][0] == '-') { 89 struct cmdtab *p; 90 91 p = lookup(&argv[0][1]); 92 if (p == (struct cmdtab *)-1) 93 errx(1, "%s: ambiguous request", &argv[0][1]); 94 if (p == (struct cmdtab *)0) 95 errx(1, "%s: unknown request", &argv[0][1]); 96 curcmd = p; 97 } else { 98 naptime = strtod(argv[0], NULL); 99 if (naptime <= 0.0) 100 naptime = 5.0; 101 } 102 argc--, argv++; 103 } 104 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 105 if (kd == NULL) { 106 error("%s", errbuf); 107 exit(1); 108 } 109 signal(SIGINT, die); 110 signal(SIGQUIT, die); 111 signal(SIGTERM, die); 112 113 /* 114 * Initialize display. Load average appears in a one line 115 * window of its own. Current command's display appears in 116 * an overlapping sub-window of stdscr configured by the display 117 * routines to minimize update work by curses. 118 */ 119 initscr(); 120 CMDLINE = LINES - 1; 121 wnd = (*curcmd->c_open)(); 122 if (wnd == NULL) { 123 warnx("couldn't initialize display"); 124 die(0); 125 } 126 wload = newwin(1, 0, 3, 20); 127 if (wload == NULL) { 128 warnx("couldn't set up load average window"); 129 die(0); 130 } 131 if (kvm_nlist(kd, namelist)) { 132 nlisterr(namelist); 133 exit(1); 134 } 135 if (namelist[X_FIRST].n_type == 0) 136 errx(1, "couldn't read namelist"); 137 gethostname(hostname, sizeof (hostname)); 138 NREAD(X_HZ, &hz, sizeof(hz)); 139 NREAD(X_STATHZ, &stathz, sizeof(stathz)); 140 hertz = stathz ? stathz : hz; 141 (*curcmd->c_init)(); 142 curcmd->c_flags |= CF_INIT; 143 labels(); 144 145 dellave = 0.0; 146 147 signal(SIGALRM, display); 148 display(0); 149 noecho(); 150 crmode(); 151 keyboard(); 152 /*NOTREACHED*/ 153 154 return EXIT_SUCCESS; 155 } 156 157 void 158 labels(void) 159 { 160 if (curcmd->c_flags & CF_LOADAV) { 161 mvaddstr(2, 20, 162 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 163 mvaddstr(3, 5, "Load Average"); 164 } 165 (*curcmd->c_label)(); 166 #ifdef notdef 167 mvprintw(21, 25, "CPU usage on %s", hostname); 168 #endif 169 refresh(); 170 } 171 172 void 173 display(int signo) 174 { 175 register int i, j; 176 struct itimerval ctv; 177 178 /* Get the load average over the last minute. */ 179 (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])); 180 (*curcmd->c_fetch)(); 181 if (curcmd->c_flags & CF_LOADAV) { 182 j = 5.0*avenrun[0] + 0.5; 183 dellave = avenrun[0]; 184 c = '|'; 185 wmove(wload, 0, 0); wclrtoeol(wload); 186 for (i = (j > 50) ? 50 : j; i > 0; i--) 187 waddch(wload, c); 188 if (j > 50) 189 wprintw(wload, " %4.1f", avenrun[0]); 190 } 191 (*curcmd->c_refresh)(); 192 if (curcmd->c_flags & CF_LOADAV) 193 wrefresh(wload); 194 wrefresh(wnd); 195 move(CMDLINE, col); 196 refresh(); 197 ctv.it_interval.tv_sec = 0; 198 ctv.it_interval.tv_usec = 0; 199 ctv.it_value.tv_sec = (int)naptime; 200 ctv.it_value.tv_usec = (naptime - (double)(int)naptime) * 1000000.0; 201 setitimer(ITIMER_REAL, &ctv, NULL); 202 } 203 204 void 205 load(void) 206 { 207 208 (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])); 209 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f", 210 avenrun[0], avenrun[1], avenrun[2]); 211 clrtoeol(); 212 } 213 214 void 215 die(int signo) 216 { 217 move(CMDLINE, 0); 218 clrtoeol(); 219 refresh(); 220 endwin(); 221 exit(0); 222 } 223 224 #include <stdarg.h> 225 226 void 227 error(const char *fmt, ...) 228 { 229 va_list ap; 230 char buf[255]; 231 int oy, ox; 232 va_start(ap, fmt); 233 234 if (wnd) { 235 getyx(stdscr, oy, ox); 236 (void) vsnprintf(buf, sizeof(buf), fmt, ap); 237 clrtoeol(); 238 standout(); 239 mvaddstr(CMDLINE, 0, buf); 240 standend(); 241 move(oy, ox); 242 refresh(); 243 } else { 244 (void) vfprintf(stderr, fmt, ap); 245 fprintf(stderr, "\n"); 246 } 247 va_end(ap); 248 } 249 250 void 251 nlisterr(struct nlist *namelist) 252 { 253 int i, n; 254 255 n = 0; 256 clear(); 257 mvprintw(2, 10, "systat: nlist: can't find following symbols:"); 258 for (i = 0; 259 namelist[i].n_name != NULL && *namelist[i].n_name != '\0'; i++) 260 if (namelist[i].n_value == 0) 261 mvprintw(2 + ++n, 10, "%s", namelist[i].n_name); 262 move(CMDLINE, 0); 263 clrtoeol(); 264 refresh(); 265 endwin(); 266 exit(1); 267 } 268