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 * $DragonFly: src/usr.bin/systat/main.c,v 1.7 2008/11/10 04:59:45 swildner Exp $ 33 */ 34 35 #include <sys/user.h> 36 #include <sys/param.h> 37 #include <sys/time.h> 38 39 #include <err.h> 40 #include <limits.h> 41 #include <locale.h> 42 #include <nlist.h> 43 #include <signal.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 #include "systat.h" 48 #include "extern.h" 49 50 static struct nlist namelist[] = { 51 #define X_FIRST 0 52 #define X_HZ 0 53 { .n_name = "_hz" }, 54 #define X_STATHZ 1 55 { .n_name = "_stathz" }, 56 { .n_name = "" } 57 }; 58 static int dellave; 59 60 kvm_t *kd; 61 sig_t sigtstpdfl; 62 double avenrun[3]; 63 int col; 64 double naptime = 5.0; 65 int verbose = 1; /* to report kvm read errs */ 66 int hz, stathz; 67 double hertz; 68 char c; 69 char *namp; 70 char hostname[MAXHOSTNAMELEN]; 71 WINDOW *wnd; 72 int CMDLINE; 73 74 static WINDOW *wload; /* one line window for load average */ 75 76 int 77 main(int argc, char **argv) 78 { 79 char errbuf[_POSIX2_LINE_MAX]; 80 81 (void) setlocale(LC_TIME, ""); 82 83 argc--, argv++; 84 while (argc > 0) { 85 if (argv[0][0] == '-') { 86 struct cmdtab *p; 87 88 p = lookup(&argv[0][1]); 89 if (p == (struct cmdtab *)-1) 90 errx(1, "%s: ambiguous request", &argv[0][1]); 91 if (p == NULL) 92 errx(1, "%s: unknown request", &argv[0][1]); 93 curcmd = p; 94 } else { 95 naptime = strtod(argv[0], NULL); 96 if (naptime <= 0.0) 97 naptime = 5.0; 98 } 99 argc--, argv++; 100 } 101 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 102 if (kd == NULL) { 103 error("%s", errbuf); 104 exit(1); 105 } 106 signal(SIGINT, die); 107 signal(SIGQUIT, die); 108 signal(SIGTERM, die); 109 110 /* 111 * Initialize display. Load average appears in a one line 112 * window of its own. Current command's display appears in 113 * an overlapping sub-window of stdscr configured by the display 114 * routines to minimize update work by curses. 115 */ 116 initscr(); 117 CMDLINE = LINES - 1; 118 wnd = (*curcmd->c_open)(); 119 if (wnd == NULL) { 120 warnx("couldn't initialize display"); 121 die(0); 122 } 123 wload = newwin(1, 0, 3, 20); 124 if (wload == NULL) { 125 warnx("couldn't set up load average window"); 126 die(0); 127 } 128 if (kvm_nlist(kd, namelist)) { 129 nlisterr(namelist); 130 exit(1); 131 } 132 if (namelist[X_FIRST].n_type == 0) 133 errx(1, "couldn't read namelist"); 134 gethostname(hostname, sizeof (hostname)); 135 NREAD(X_HZ, &hz, sizeof(hz)); 136 NREAD(X_STATHZ, &stathz, sizeof(stathz)); 137 hertz = stathz ? stathz : hz; 138 (*curcmd->c_init)(); 139 curcmd->c_flags |= CF_INIT; 140 labels(); 141 142 dellave = 0.0; 143 144 signal(SIGALRM, display); 145 display(0); 146 noecho(); 147 crmode(); 148 keyboard(); 149 /*NOTREACHED*/ 150 151 return EXIT_SUCCESS; 152 } 153 154 void 155 labels(void) 156 { 157 if (curcmd->c_flags & CF_LOADAV) { 158 mvaddstr(2, 20, 159 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 160 mvaddstr(3, 5, "Load Average"); 161 } 162 (*curcmd->c_label)(); 163 #ifdef notdef 164 mvprintw(21, 25, "CPU usage on %s", hostname); 165 #endif 166 refresh(); 167 } 168 169 void 170 display(int signo __unused) 171 { 172 int i, j; 173 struct itimerval ctv; 174 175 /* Get the load average over the last minute. */ 176 (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])); 177 (*curcmd->c_fetch)(); 178 if (curcmd->c_flags & CF_LOADAV) { 179 j = 5.0*avenrun[0] + 0.5; 180 dellave = avenrun[0]; 181 c = '|'; 182 wmove(wload, 0, 0); wclrtoeol(wload); 183 for (i = (j > 50) ? 50 : j; i > 0; i--) 184 waddch(wload, c); 185 if (j > 50) 186 wprintw(wload, " %4.1f", avenrun[0]); 187 } 188 (*curcmd->c_refresh)(); 189 if (curcmd->c_flags & CF_LOADAV) 190 wrefresh(wload); 191 wrefresh(wnd); 192 move(CMDLINE, col); 193 refresh(); 194 ctv.it_interval.tv_sec = 0; 195 ctv.it_interval.tv_usec = 0; 196 ctv.it_value.tv_sec = (int)naptime; 197 ctv.it_value.tv_usec = (naptime - (double)(int)naptime) * 1000000.0; 198 setitimer(ITIMER_REAL, &ctv, NULL); 199 } 200 201 void 202 load(void) 203 { 204 205 (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])); 206 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f", 207 avenrun[0], avenrun[1], avenrun[2]); 208 clrtoeol(); 209 } 210 211 void 212 die(int signo __unused) 213 { 214 move(CMDLINE, 0); 215 clrtoeol(); 216 refresh(); 217 endwin(); 218 exit(0); 219 } 220 221 #include <stdarg.h> 222 223 void 224 error(const char *fmt, ...) 225 { 226 va_list ap; 227 char buf[255]; 228 int oy, ox; 229 va_start(ap, fmt); 230 231 if (wnd) { 232 getyx(stdscr, oy, ox); 233 (void) vsnprintf(buf, sizeof(buf), fmt, ap); 234 clrtoeol(); 235 standout(); 236 mvaddstr(CMDLINE, 0, buf); 237 standend(); 238 move(oy, ox); 239 refresh(); 240 } else { 241 (void) vfprintf(stderr, fmt, ap); 242 fprintf(stderr, "\n"); 243 } 244 va_end(ap); 245 } 246 247 void 248 nlisterr(struct nlist *n_list) 249 { 250 int i, n; 251 252 n = 0; 253 clear(); 254 mvprintw(2, 10, "systat: nlist: can't find following symbols:"); 255 for (i = 0; 256 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++) 257 if (n_list[i].n_value == 0) 258 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name); 259 move(CMDLINE, 0); 260 clrtoeol(); 261 refresh(); 262 endwin(); 263 exit(1); 264 } 265