usr.bin/systat/main.c

   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/param.h>
  35 #include <sys/time.h>
  36
  37 #include <err.h>
  38 #include <limits.h>
  39 #include <locale.h>
  40 #include <nlist.h>
  41 #include <signal.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <unistd.h>
  45 #include "systat.h"
  46 #include "extern.h"
  47
  48 static struct nlist namelist[] = {
  49 #define X_FIRST         0
  50 #define X_HZ            0
  51         { .n_name = "_hz" },
  52 #define X_STATHZ                1
  53         { .n_name = "_stathz" },
  54         { .n_name = "" }
  55 };
  56 static int     dellave;
  57
  58 kvm_t *kd;
  59 sig_t   sigtstpdfl;
  60 double avenrun[3];
  61 int     WideMode;
  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         char *op;
  80
  81         setlocale(LC_TIME, "");
  82
  83         argc--, argv++;
  84         while (argc > 0) {
  85                 op = argv[0];
  86
  87                 if (op[0] == '-' && op[1] && op[2] == 0) {
  88                         switch(op[1]) {
  89                         case 'w':
  90                                 WideMode = 1;
  91                                 break;
  92                         default:
  93                                 fprintf(stderr,
  94                                         "systat [-w] -cmd [interval]\n");
  95                                 fprintf(stderr,
  96                                         "       -pigs\n"
  97                                         "       -swap\n"
  98                                         "       -mb\n"
  99                                         "       -io\n"
 100                                         "       -vm\n"
 101                                         "       -pv\n"
 102                                         "       -netstat\n"
 103                                         "       -netbw\n"
 104                                         "       -pf\n"
 105                                         "       -icmp\n"
 106                                         "       -ip\n"
 107                                         "       -tcp\n"
 108                                         "       -ifstat\n"
 109                                         "       -altqs\n"
 110                                         "       -ip6\n"
 111                                         "       -icmp6\n"
 112                                         "       -sensors\n");
 113                                 exit(1);
 114                         }
 115                 } else if (op[0] == '-') {
 116                         struct cmdtab *p;
 117
 118                         p = lookup(&argv[0][1]);
 119                         if (p == (struct cmdtab *)-1)
 120                                 errx(1, "%s: ambiguous request", &argv[0][1]);
 121                         if (p == NULL)
 122                                 errx(1, "%s: unknown request", &argv[0][1]);
 123                         curcmd = p;
 124                 } else {
 125                         naptime = strtod(argv[0], NULL);
 126                         if (naptime <= 0.0)
 127                                 naptime = 5.0;
 128                 }
 129                 argc--, argv++;
 130         }
 131         kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
 132         if (kd == NULL) {
 133                 error("%s", errbuf);
 134                 exit(1);
 135         }
 136         signal(SIGINT, die);
 137         signal(SIGQUIT, die);
 138         signal(SIGTERM, die);
 139
 140         /*
 141          * Initialize display.  Load average appears in a one line
 142          * window of its own.  Current command's display appears in
 143          * an overlapping sub-window of stdscr configured by the display
 144          * routines to minimize update work by curses.
 145          */
 146         initscr();
 147         CMDLINE = LINES - 1;
 148         wnd = (*curcmd->c_open)();
 149         if (wnd == NULL) {
 150                 warnx("couldn't initialize display");
 151                 die(0);
 152         }
 153         wload = newwin(1, 0, 3, 20);
 154         if (wload == NULL) {
 155                 warnx("couldn't set up load average window");
 156                 die(0);
 157         }
 158         if (kvm_nlist(kd, namelist)) {
 159                 nlisterr(namelist);
 160                 exit(1);
 161         }
 162         if (namelist[X_FIRST].n_type == 0)
 163                 errx(1, "couldn't read namelist");
 164         gethostname(hostname, sizeof (hostname));
 165         NREAD(X_HZ, &hz, sizeof(hz));
 166         NREAD(X_STATHZ, &stathz, sizeof(stathz));
 167         hertz = stathz ? stathz : hz;
 168         (*curcmd->c_init)();
 169         curcmd->c_flags |= CF_INIT;
 170         labels();
 171
 172         dellave = 0.0;
 173
 174         signal(SIGALRM, display);
 175         display(0);
 176         noecho();
 177         crmode();
 178         keyboard();
 179         /*NOTREACHED*/
 180
 181         return EXIT_SUCCESS;
 182 }
 183
 184 void
 185 labels(void)
 186 {
 187         if (curcmd->c_flags & CF_LOADAV) {
 188                 mvaddstr(2, 20,
 189                     "/0   /1   /2   /3   /4   /5   /6   /7   /8   /9   /10");
 190                 mvaddstr(3, 5, "Load Average");
 191         }
 192         (*curcmd->c_label)();
 193 #ifdef notdef
 194         mvprintw(21, 25, "CPU usage on %s", hostname);
 195 #endif
 196         refresh();
 197 }
 198
 199 void
 200 display(int signo __unused)
 201 {
 202         int i, j;
 203         struct itimerval ctv;
 204
 205         /* Get the load average over the last minute. */
 206         (void) getloadavg(avenrun, NELEM(avenrun));
 207         (*curcmd->c_fetch)();
 208         if (curcmd->c_flags & CF_LOADAV) {
 209                 j = 5.0*avenrun[0] + 0.5;
 210                 dellave = avenrun[0];
 211                 c = '|';
 212                 wmove(wload, 0, 0); wclrtoeol(wload);
 213                 for (i = (j > 50) ? 50 : j; i > 0; i--)
 214                         waddch(wload, c);
 215                 if (j > 50)
 216                         wprintw(wload, " %4.1f", avenrun[0]);
 217         }
 218         (*curcmd->c_refresh)();
 219         if (curcmd->c_flags & CF_LOADAV)
 220                 wrefresh(wload);
 221         wrefresh(wnd);
 222         move(CMDLINE, col);
 223         refresh();
 224         ctv.it_interval.tv_sec = 0;
 225         ctv.it_interval.tv_usec = 0;
 226         ctv.it_value.tv_sec = (int)naptime;
 227         ctv.it_value.tv_usec = (naptime - (double)(int)naptime) * 1000000.0;
 228         setitimer(ITIMER_REAL, &ctv, NULL);
 229 }
 230
 231 void
 232 load(void)
 233 {
 234
 235         (void) getloadavg(avenrun, NELEM(avenrun));
 236         mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
 237             avenrun[0], avenrun[1], avenrun[2]);
 238         clrtoeol();
 239 }
 240
 241 void
 242 die(int signo __unused)
 243 {
 244         move(CMDLINE, 0);
 245         clrtoeol();
 246         refresh();
 247         endwin();
 248         exit(0);
 249 }
 250
 251 #include <stdarg.h>
 252
 253 void
 254 error(const char *fmt, ...)
 255 {
 256         va_list ap;
 257         char buf[255];
 258         int oy, ox;
 259         va_start(ap, fmt);
 260
 261         if (wnd) {
 262                 getyx(stdscr, oy, ox);
 263                 (void) vsnprintf(buf, sizeof(buf), fmt, ap);
 264                 clrtoeol();
 265                 standout();
 266                 mvaddstr(CMDLINE, 0, buf);
 267                 standend();
 268                 move(oy, ox);
 269                 refresh();
 270         } else {
 271                 (void) vfprintf(stderr, fmt, ap);
 272                 fprintf(stderr, "\n");
 273         }
 274         va_end(ap);
 275 }
 276
 277 void
 278 nlisterr(struct nlist *n_list)
 279 {
 280         int i, n;
 281
 282         n = 0;
 283         clear();
 284         mvprintw(2, 10, "systat: nlist: can't find following symbols:");
 285         for (i = 0;
 286             n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++)
 287                 if (n_list[i].n_value == 0)
 288                         mvprintw(2 + ++n, 10, "%s", n_list[i].n_name);
 289         move(CMDLINE, 0);
 290         clrtoeol();
 291         refresh();
 292         endwin();
 293         exit(1);
 294 }