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. 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 * @(#) Copyright (c) 1980, 1992, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)main.c 8.1 (Berkeley) 6/6/93 31 * $FreeBSD: src/usr.bin/systat/main.c,v 1.11.2.1 2001/06/06 20:26:01 tmm Exp $ 32 */ 33 34 #include <sys/user.h> 35 #include <sys/param.h> 36 #include <sys/time.h> 37 38 #include <err.h> 39 #include <limits.h> 40 #include <locale.h> 41 #include <nlist.h> 42 #include <signal.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include "systat.h" 47 #include "extern.h" 48 49 static struct nlist namelist[] = { 50 #define X_FIRST 0 51 #define X_HZ 0 52 { .n_name = "_hz" }, 53 #define X_STATHZ 1 54 { .n_name = "_stathz" }, 55 { .n_name = "" } 56 }; 57 static int dellave; 58 59 kvm_t *kd; 60 sig_t sigtstpdfl; 61 double avenrun[3]; 62 int col; 63 double naptime = 5.0; 64 int verbose = 1; /* to report kvm read errs */ 65 int hz, stathz; 66 double hertz; 67 char c; 68 char *namp; 69 char hostname[MAXHOSTNAMELEN]; 70 WINDOW *wnd; 71 int CMDLINE; 72 73 static WINDOW *wload; /* one line window for load average */ 74 75 int 76 main(int argc, char **argv) 77 { 78 char errbuf[_POSIX2_LINE_MAX]; 79 80 (void) setlocale(LC_TIME, ""); 81 82 argc--, argv++; 83 while (argc > 0) { 84 if (argv[0][0] == '-') { 85 struct cmdtab *p; 86 87 p = lookup(&argv[0][1]); 88 if (p == (struct cmdtab *)-1) 89 errx(1, "%s: ambiguous request", &argv[0][1]); 90 if (p == NULL) 91 errx(1, "%s: unknown request", &argv[0][1]); 92 curcmd = p; 93 } else { 94 naptime = strtod(argv[0], NULL); 95 if (naptime <= 0.0) 96 naptime = 5.0; 97 } 98 argc--, argv++; 99 } 100 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 101 if (kd == NULL) { 102 error("%s", errbuf); 103 exit(1); 104 } 105 signal(SIGINT, die); 106 signal(SIGQUIT, die); 107 signal(SIGTERM, die); 108 109 /* 110 * Initialize display. Load average appears in a one line 111 * window of its own. Current command's display appears in 112 * an overlapping sub-window of stdscr configured by the display 113 * routines to minimize update work by curses. 114 */ 115 initscr(); 116 CMDLINE = LINES - 1; 117 wnd = (*curcmd->c_open)(); 118 if (wnd == NULL) { 119 warnx("couldn't initialize display"); 120 die(0); 121 } 122 wload = newwin(1, 0, 3, 20); 123 if (wload == NULL) { 124 warnx("couldn't set up load average window"); 125 die(0); 126 } 127 if (kvm_nlist(kd, namelist)) { 128 nlisterr(namelist); 129 exit(1); 130 } 131 if (namelist[X_FIRST].n_type == 0) 132 errx(1, "couldn't read namelist"); 133 gethostname(hostname, sizeof (hostname)); 134 NREAD(X_HZ, &hz, sizeof(hz)); 135 NREAD(X_STATHZ, &stathz, sizeof(stathz)); 136 hertz = stathz ? stathz : hz; 137 (*curcmd->c_init)(); 138 curcmd->c_flags |= CF_INIT; 139 labels(); 140 141 dellave = 0.0; 142 143 signal(SIGALRM, display); 144 display(0); 145 noecho(); 146 crmode(); 147 keyboard(); 148 /*NOTREACHED*/ 149 150 return EXIT_SUCCESS; 151 } 152 153 void 154 labels(void) 155 { 156 if (curcmd->c_flags & CF_LOADAV) { 157 mvaddstr(2, 20, 158 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 159 mvaddstr(3, 5, "Load Average"); 160 } 161 (*curcmd->c_label)(); 162 #ifdef notdef 163 mvprintw(21, 25, "CPU usage on %s", hostname); 164 #endif 165 refresh(); 166 } 167 168 void 169 display(int signo __unused) 170 { 171 int i, j; 172 struct itimerval ctv; 173 174 /* Get the load average over the last minute. */ 175 (void) getloadavg(avenrun, NELEM(avenrun)); 176 (*curcmd->c_fetch)(); 177 if (curcmd->c_flags & CF_LOADAV) { 178 j = 5.0*avenrun[0] + 0.5; 179 dellave = avenrun[0]; 180 c = '|'; 181 wmove(wload, 0, 0); wclrtoeol(wload); 182 for (i = (j > 50) ? 50 : j; i > 0; i--) 183 waddch(wload, c); 184 if (j > 50) 185 wprintw(wload, " %4.1f", avenrun[0]); 186 } 187 (*curcmd->c_refresh)(); 188 if (curcmd->c_flags & CF_LOADAV) 189 wrefresh(wload); 190 wrefresh(wnd); 191 move(CMDLINE, col); 192 refresh(); 193 ctv.it_interval.tv_sec = 0; 194 ctv.it_interval.tv_usec = 0; 195 ctv.it_value.tv_sec = (int)naptime; 196 ctv.it_value.tv_usec = (naptime - (double)(int)naptime) * 1000000.0; 197 setitimer(ITIMER_REAL, &ctv, NULL); 198 } 199 200 void 201 load(void) 202 { 203 204 (void) getloadavg(avenrun, NELEM(avenrun)); 205 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f", 206 avenrun[0], avenrun[1], avenrun[2]); 207 clrtoeol(); 208 } 209 210 void 211 die(int signo __unused) 212 { 213 move(CMDLINE, 0); 214 clrtoeol(); 215 refresh(); 216 endwin(); 217 exit(0); 218 } 219 220 #include <stdarg.h> 221 222 void 223 error(const char *fmt, ...) 224 { 225 va_list ap; 226 char buf[255]; 227 int oy, ox; 228 va_start(ap, fmt); 229 230 if (wnd) { 231 getyx(stdscr, oy, ox); 232 (void) vsnprintf(buf, sizeof(buf), fmt, ap); 233 clrtoeol(); 234 standout(); 235 mvaddstr(CMDLINE, 0, buf); 236 standend(); 237 move(oy, ox); 238 refresh(); 239 } else { 240 (void) vfprintf(stderr, fmt, ap); 241 fprintf(stderr, "\n"); 242 } 243 va_end(ap); 244 } 245 246 void 247 nlisterr(struct nlist *n_list) 248 { 249 int i, n; 250 251 n = 0; 252 clear(); 253 mvprintw(2, 10, "systat: nlist: can't find following symbols:"); 254 for (i = 0; 255 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++) 256 if (n_list[i].n_value == 0) 257 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name); 258 move(CMDLINE, 0); 259 clrtoeol(); 260 refresh(); 261 endwin(); 262 exit(1); 263 } 264