main.c revision 1.7
1 /* $NetBSD: main.c,v 1.7 1996/03/21 18:04:25 jtc Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 static char copyright[] = 38 "@(#) Copyright (c) 1980, 1992, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93"; 45 #endif 46 static char rcsid[] = "$NetBSD: main.c,v 1.7 1996/03/21 18:04:25 jtc Exp $"; 47 #endif /* not lint */ 48 49 #include <sys/param.h> 50 51 #include <err.h> 52 #include <nlist.h> 53 #include <signal.h> 54 #include <stdio.h> 55 #include <string.h> 56 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 char c; 78 char *namp; 79 char hostname[MAXHOSTNAMELEN]; 80 WINDOW *wnd; 81 int CMDLINE; 82 83 static WINDOW *wload; /* one line window for load average */ 84 85 int 86 main(argc, argv) 87 int argc; 88 char **argv; 89 { 90 char errbuf[80]; 91 92 argc--, argv++; 93 while (argc > 0) { 94 if (argv[0][0] == '-') { 95 struct cmdtab *p; 96 97 p = lookup(&argv[0][1]); 98 if (p == (struct cmdtab *)-1) 99 errx(1, "ambiguous request: %s", &argv[0][1]); 100 if (p == 0) 101 errx(1, "unknown request: %s", &argv[0][1]); 102 curcmd = p; 103 } else { 104 naptime = atoi(argv[0]); 105 if (naptime <= 0) 106 naptime = 5; 107 } 108 argc--, argv++; 109 } 110 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 111 if (kd == NULL) { 112 error("%s", errbuf); 113 exit(1); 114 } 115 if (kvm_nlist(kd, namelist)) { 116 nlisterr(namelist); 117 exit(1); 118 } 119 if (namelist[X_FIRST].n_type == 0) 120 errx(1, "couldn't read namelist"); 121 signal(SIGINT, die); 122 signal(SIGQUIT, die); 123 signal(SIGTERM, die); 124 125 /* 126 * Initialize display. Load average appears in a one line 127 * window of its own. Current command's display appears in 128 * an overlapping sub-window of stdscr configured by the display 129 * routines to minimize update work by curses. 130 */ 131 if (initscr() == NULL) 132 { 133 warnx("couldn't initialize screen"); 134 exit(0); 135 } 136 137 CMDLINE = LINES - 1; 138 wnd = (*curcmd->c_open)(); 139 if (wnd == NULL) { 140 warnx("couldn't initialize display"); 141 die(0); 142 } 143 wload = newwin(1, 0, 3, 20); 144 if (wload == NULL) { 145 warnx("couldn't set up load average window"); 146 die(0); 147 } 148 gethostname(hostname, sizeof (hostname)); 149 NREAD(X_HZ, &hz, LONG); 150 NREAD(X_STATHZ, &stathz, LONG); 151 (*curcmd->c_init)(); 152 curcmd->c_flags |= CF_INIT; 153 labels(); 154 155 dellave = 0.0; 156 157 signal(SIGALRM, display); 158 display(0); 159 noecho(); 160 crmode(); 161 keyboard(); 162 /*NOTREACHED*/ 163 } 164 165 void 166 labels() 167 { 168 if (curcmd->c_flags & CF_LOADAV) { 169 mvaddstr(2, 20, 170 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 171 mvaddstr(3, 5, "Load Average"); 172 } 173 (*curcmd->c_label)(); 174 #ifdef notdef 175 mvprintw(21, 25, "CPU usage on %s", hostname); 176 #endif 177 refresh(); 178 } 179 180 void 181 display(signo) 182 int signo; 183 { 184 register int i, j; 185 186 /* Get the load average over the last minute. */ 187 (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])); 188 (*curcmd->c_fetch)(); 189 if (curcmd->c_flags & CF_LOADAV) { 190 j = 5.0*avenrun[0] + 0.5; 191 dellave -= avenrun[0]; 192 if (dellave >= 0.0) 193 c = '<'; 194 else { 195 c = '>'; 196 dellave = -dellave; 197 } 198 if (dellave < 0.1) 199 c = '|'; 200 dellave = avenrun[0]; 201 wmove(wload, 0, 0); wclrtoeol(wload); 202 for (i = (j > 50) ? 50 : j; i > 0; i--) 203 waddch(wload, c); 204 if (j > 50) 205 wprintw(wload, " %4.1f", avenrun[0]); 206 } 207 (*curcmd->c_refresh)(); 208 if (curcmd->c_flags & CF_LOADAV) 209 wrefresh(wload); 210 wrefresh(wnd); 211 move(CMDLINE, col); 212 refresh(); 213 alarm(naptime); 214 } 215 216 void 217 load() 218 { 219 220 (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])); 221 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f", 222 avenrun[0], avenrun[1], avenrun[2]); 223 clrtoeol(); 224 } 225 226 void 227 die(signo) 228 int signo; 229 { 230 move(CMDLINE, 0); 231 clrtoeol(); 232 refresh(); 233 endwin(); 234 exit(0); 235 } 236 237 #if __STDC__ 238 #include <stdarg.h> 239 #else 240 #include <varargs.h> 241 #endif 242 243 #if __STDC__ 244 void 245 error(const char *fmt, ...) 246 #else 247 void 248 error(fmt, va_alist) 249 char *fmt; 250 va_dcl 251 #endif 252 { 253 va_list ap; 254 char buf[255]; 255 int oy, ox; 256 #if __STDC__ 257 va_start(ap, fmt); 258 #else 259 va_start(ap); 260 #endif 261 262 if (wnd) { 263 getyx(stdscr, oy, ox); 264 (void) vsprintf(buf, fmt, ap); 265 clrtoeol(); 266 standout(); 267 mvaddstr(CMDLINE, 0, buf); 268 standend(); 269 move(oy, ox); 270 refresh(); 271 } else { 272 (void) vfprintf(stderr, fmt, ap); 273 fprintf(stderr, "\n"); 274 } 275 va_end(ap); 276 } 277 278 void 279 nlisterr(namelist) 280 struct nlist namelist[]; 281 { 282 int i, n; 283 284 n = 0; 285 clear(); 286 mvprintw(2, 10, "systat: nlist: can't find following symbols:"); 287 for (i = 0; 288 namelist[i].n_name != NULL && *namelist[i].n_name != '\0'; i++) 289 if (namelist[i].n_value == 0) 290 mvprintw(2 + ++n, 10, "%s", namelist[i].n_name); 291 move(CMDLINE, 0); 292 clrtoeol(); 293 refresh(); 294 endwin(); 295 exit(1); 296 } 297
Indexes created Thu Sep 25 16:09:42 GMT 2025