main.c revision 1.2
1 /* $NetBSD: main.c,v 1.2 1995/01/20 08:52:00 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 1.2 1995/01/20 08:52:00 jtc Exp $"; 47 #endif /* not lint */ 48 49 #include <sys/param.h> 50 51 #include <nlist.h> 52 #include <signal.h> 53 #include <stdio.h> 54 #include "systat.h" 55 #include "extern.h" 56 57 static struct nlist namelist[] = { 58 #define X_FIRST 0 59 #define X_HZ 0 60 { "_hz" }, 61 #define X_STATHZ 1 62 { "_stathz" }, 63 { "" } 64 }; 65 static int dellave; 66 67 kvm_t *kd; 68 sig_t sigtstpdfl; 69 double avenrun[3]; 70 int col; 71 int naptime = 5; 72 int verbose = 1; /* to report kvm read errs */ 73 int hz, stathz; 74 char c; 75 char *namp; 76 char hostname[MAXHOSTNAMELEN]; 77 WINDOW *wnd; 78 int CMDLINE; 79 80 static WINDOW *wload; /* one line window for load average */ 81 82 void 83 main(argc, argv) 84 int argc; 85 char **argv; 86 { 87 char errbuf[80]; 88 89 argc--, argv++; 90 while (argc > 0) { 91 if (argv[0][0] == '-') { 92 struct cmdtab *p; 93 94 p = lookup(&argv[0][1]); 95 if (p == (struct cmdtab *)-1) { 96 fprintf(stderr, "%s: unknown request\n", 97 &argv[0][1]); 98 exit(1); 99 } 100 curcmd = p; 101 } else { 102 naptime = atoi(argv[0]); 103 if (naptime <= 0) 104 naptime = 5; 105 } 106 argc--, argv++; 107 } 108 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 109 if (kd == NULL) { 110 error("%s", errbuf); 111 exit(1); 112 } 113 if (kvm_nlist(kd, namelist)) { 114 nlisterr(namelist); 115 exit(1); 116 } 117 if (namelist[X_FIRST].n_type == 0) { 118 fprintf(stderr, "couldn't read namelist.\n"); 119 exit(1); 120 } 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 initscr(); 132 CMDLINE = LINES - 1; 133 wnd = (*curcmd->c_open)(); 134 if (wnd == NULL) { 135 fprintf(stderr, "Couldn't initialize display.\n"); 136 die(0); 137 } 138 wload = newwin(1, 0, 3, 20); 139 if (wload == NULL) { 140 fprintf(stderr, "Couldn't set up load average window.\n"); 141 die(0); 142 } 143 gethostname(hostname, sizeof (hostname)); 144 NREAD(X_HZ, &hz, LONG); 145 NREAD(X_STATHZ, &stathz, LONG); 146 (*curcmd->c_init)(); 147 curcmd->c_flags |= CF_INIT; 148 labels(); 149 150 dellave = 0.0; 151 152 signal(SIGALRM, display); 153 display(0); 154 noecho(); 155 crmode(); 156 keyboard(); 157 /*NOTREACHED*/ 158 } 159 160 void 161 labels() 162 { 163 if (curcmd->c_flags & CF_LOADAV) { 164 mvaddstr(2, 20, 165 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 166 mvaddstr(3, 5, "Load Average"); 167 } 168 (*curcmd->c_label)(); 169 #ifdef notdef 170 mvprintw(21, 25, "CPU usage on %s", hostname); 171 #endif 172 refresh(); 173 } 174 175 void 176 display(signo) 177 int signo; 178 { 179 register int i, j; 180 181 /* Get the load average over the last minute. */ 182 (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])); 183 (*curcmd->c_fetch)(); 184 if (curcmd->c_flags & CF_LOADAV) { 185 j = 5.0*avenrun[0] + 0.5; 186 dellave -= avenrun[0]; 187 if (dellave >= 0.0) 188 c = '<'; 189 else { 190 c = '>'; 191 dellave = -dellave; 192 } 193 if (dellave < 0.1) 194 c = '|'; 195 dellave = avenrun[0]; 196 wmove(wload, 0, 0); wclrtoeol(wload); 197 for (i = (j > 50) ? 50 : j; i > 0; i--) 198 waddch(wload, c); 199 if (j > 50) 200 wprintw(wload, " %4.1f", avenrun[0]); 201 } 202 (*curcmd->c_refresh)(); 203 if (curcmd->c_flags & CF_LOADAV) 204 wrefresh(wload); 205 wrefresh(wnd); 206 move(CMDLINE, col); 207 refresh(); 208 alarm(naptime); 209 } 210 211 void 212 load() 213 { 214 215 (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])); 216 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f", 217 avenrun[0], avenrun[1], avenrun[2]); 218 clrtoeol(); 219 } 220 221 void 222 die(signo) 223 int signo; 224 { 225 move(CMDLINE, 0); 226 clrtoeol(); 227 refresh(); 228 endwin(); 229 exit(0); 230 } 231 232 #if __STDC__ 233 #include <stdarg.h> 234 #else 235 #include <varargs.h> 236 #endif 237 238 #if __STDC__ 239 void 240 error(const char *fmt, ...) 241 #else 242 void 243 error(fmt, va_alist) 244 char *fmt; 245 va_dcl 246 #endif 247 { 248 va_list ap; 249 char buf[255]; 250 int oy, ox; 251 #if __STDC__ 252 va_start(ap, fmt); 253 #else 254 va_start(ap); 255 #endif 256 257 if (wnd) { 258 getyx(stdscr, oy, ox); 259 (void) vsprintf(buf, fmt, ap); 260 clrtoeol(); 261 standout(); 262 mvaddstr(CMDLINE, 0, buf); 263 standend(); 264 move(oy, ox); 265 refresh(); 266 } else { 267 (void) vfprintf(stderr, fmt, ap); 268 fprintf(stderr, "\n"); 269 } 270 va_end(ap); 271 } 272 273 void 274 nlisterr(namelist) 275 struct nlist namelist[]; 276 { 277 int i, n; 278 279 n = 0; 280 clear(); 281 mvprintw(2, 10, "systat: nlist: can't find following symbols:"); 282 for (i = 0; 283 namelist[i].n_name != NULL && *namelist[i].n_name != '\0'; i++) 284 if (namelist[i].n_value == 0) 285 mvprintw(2 + ++n, 10, "%s", namelist[i].n_name); 286 move(CMDLINE, 0); 287 clrtoeol(); 288 refresh(); 289 endwin(); 290 exit(1); 291 } 292
Indexes created Thu Sep 25 16:09:42 GMT 2025