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 1.7 2008/11/10 04:59:45 swildner Exp $ 37 */ 38 39 #include <sys/user.h> 40 #include <sys/param.h> 41 #include <sys/time.h> 42 43 #include <err.h> 44 #include <limits.h> 45 #include <locale.h> 46 #include <nlist.h> 47 #include <signal.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <unistd.h> 51 #include "systat.h" 52 #include "extern.h" 53 54 static struct nlist namelist[] = { 55 #define X_FIRST 0 56 #define X_HZ 0 57 { .n_name = "_hz" }, 58 #define X_STATHZ 1 59 { .n_name = "_stathz" }, 60 { .n_name = "" } 61 }; 62 static int dellave; 63 64 kvm_t *kd; 65 sig_t sigtstpdfl; 66 double avenrun[3]; 67 int col; 68 double naptime = 5.0; 69 int verbose = 1; /* to report kvm read errs */ 70 int hz, stathz; 71 double hertz; 72 char c; 73 char *namp; 74 char hostname[MAXHOSTNAMELEN]; 75 WINDOW *wnd; 76 int CMDLINE; 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]; 84 85 (void) setlocale(LC_TIME, ""); 86 87 argc--, argv++; 88 while (argc > 0) { 89 if (argv[0][0] == '-') { 90 struct cmdtab *p; 91 92 p = lookup(&argv[0][1]); 93 if (p == (struct cmdtab *)-1) 94 errx(1, "%s: ambiguous request", &argv[0][1]); 95 if (p == NULL) 96 errx(1, "%s: unknown request", &argv[0][1]); 97 curcmd = p; 98 } else { 99 naptime = strtod(argv[0], NULL); 100 if (naptime <= 0.0) 101 naptime = 5.0; 102 } 103 argc--, argv++; 104 } 105 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 106 if (kd == NULL) { 107 error("%s", errbuf); 108 exit(1); 109 } 110 signal(SIGINT, die); 111 signal(SIGQUIT, die); 112 signal(SIGTERM, die); 113 114 /* 115 * Initialize display. Load average appears in a one line 116 * window of its own. Current command's display appears in 117 * an overlapping sub-window of stdscr configured by the display 118 * routines to minimize update work by curses. 119 */ 120 initscr(); 121 CMDLINE = LINES - 1; 122 wnd = (*curcmd->c_open)(); 123 if (wnd == NULL) { 124 warnx("couldn't initialize display"); 125 die(0); 126 } 127 wload = newwin(1, 0, 3, 20); 128 if (wload == NULL) { 129 warnx("couldn't set up load average window"); 130 die(0); 131 } 132 if (kvm_nlist(kd, namelist)) { 133 nlisterr(namelist); 134 exit(1); 135 } 136 if (namelist[X_FIRST].n_type == 0) 137 errx(1, "couldn't read namelist"); 138 gethostname(hostname, sizeof (hostname)); 139 NREAD(X_HZ, &hz, sizeof(hz)); 140 NREAD(X_STATHZ, &stathz, sizeof(stathz)); 141 hertz = stathz ? stathz : hz; 142 (*curcmd->c_init)(); 143 curcmd->c_flags |= CF_INIT; 144 labels(); 145 146 dellave = 0.0; 147 148 signal(SIGALRM, display); 149 display(0); 150 noecho(); 151 crmode(); 152 keyboard(); 153 /*NOTREACHED*/ 154 155 return EXIT_SUCCESS; 156 } 157 158 void 159 labels(void) 160 { 161 if (curcmd->c_flags & CF_LOADAV) { 162 mvaddstr(2, 20, 163 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 164 mvaddstr(3, 5, "Load Average"); 165 } 166 (*curcmd->c_label)(); 167 #ifdef notdef 168 mvprintw(21, 25, "CPU usage on %s", hostname); 169 #endif 170 refresh(); 171 } 172 173 void 174 display(int signo __unused) 175 { 176 int i, j; 177 struct itimerval ctv; 178 179 /* Get the load average over the last minute. */ 180 (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])); 181 (*curcmd->c_fetch)(); 182 if (curcmd->c_flags & CF_LOADAV) { 183 j = 5.0*avenrun[0] + 0.5; 184 dellave = avenrun[0]; 185 c = '|'; 186 wmove(wload, 0, 0); wclrtoeol(wload); 187 for (i = (j > 50) ? 50 : j; i > 0; i--) 188 waddch(wload, c); 189 if (j > 50) 190 wprintw(wload, " %4.1f", avenrun[0]); 191 } 192 (*curcmd->c_refresh)(); 193 if (curcmd->c_flags & CF_LOADAV) 194 wrefresh(wload); 195 wrefresh(wnd); 196 move(CMDLINE, col); 197 refresh(); 198 ctv.it_interval.tv_sec = 0; 199 ctv.it_interval.tv_usec = 0; 200 ctv.it_value.tv_sec = (int)naptime; 201 ctv.it_value.tv_usec = (naptime - (double)(int)naptime) * 1000000.0; 202 setitimer(ITIMER_REAL, &ctv, NULL); 203 } 204 205 void 206 load(void) 207 { 208 209 (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])); 210 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f", 211 avenrun[0], avenrun[1], avenrun[2]); 212 clrtoeol(); 213 } 214 215 void 216 die(int signo __unused) 217 { 218 move(CMDLINE, 0); 219 clrtoeol(); 220 refresh(); 221 endwin(); 222 exit(0); 223 } 224 225 #include <stdarg.h> 226 227 void 228 error(const char *fmt, ...) 229 { 230 va_list ap; 231 char buf[255]; 232 int oy, ox; 233 va_start(ap, fmt); 234 235 if (wnd) { 236 getyx(stdscr, oy, ox); 237 (void) vsnprintf(buf, sizeof(buf), fmt, ap); 238 clrtoeol(); 239 standout(); 240 mvaddstr(CMDLINE, 0, buf); 241 standend(); 242 move(oy, ox); 243 refresh(); 244 } else { 245 (void) vfprintf(stderr, fmt, ap); 246 fprintf(stderr, "\n"); 247 } 248 va_end(ap); 249 } 250 251 void 252 nlisterr(struct nlist *n_list) 253 { 254 int i, n; 255 256 n = 0; 257 clear(); 258 mvprintw(2, 10, "systat: nlist: can't find following symbols:"); 259 for (i = 0; 260 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++) 261 if (n_list[i].n_value == 0) 262 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name); 263 move(CMDLINE, 0); 264 clrtoeol(); 265 refresh(); 266 endwin(); 267 exit(1); 268 } 269