ruptime.tproj/ruptime.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1983, 1993, 1994
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58
  59 #ifndef lint
  60 static char copyright[] =
  61 "@(#) Copyright (c) 1983, 1993, 1994\n\
  62         The Regents of the University of California.  All rights reserved.\n";
  63 #endif /* not lint */
  64
  65 #include <sys/param.h>
  66
  67 #include <protocols/rwhod.h>
  68
  69 #include <dirent.h>
  70 #include <err.h>
  71 #include <errno.h>
  72 #include <fcntl.h>
  73 #include <stdio.h>
  74 #include <stdlib.h>
  75 #include <string.h>
  76 #include <time.h>
  77 #include <tzfile.h>
  78 #include <unistd.h>
  79
  80 struct hs {
  81         struct  whod *hs_wd;
  82         int     hs_nusers;
  83 } *hs;
  84 struct  whod awhod;
  85
  86 #define ISDOWN(h)               (now - (h)->hs_wd->wd_recvtime > 11 * 60)
  87 #define WHDRSIZE        (sizeof (awhod) - sizeof (awhod.wd_we))
  88
  89 size_t nhosts;
  90 time_t now;
  91 int rflg = 1;
  92
  93 int      hscmp __P((const void *, const void *));
  94 char    *interval __P((time_t, char *));
  95 int      lcmp __P((const void *, const void *));
  96 void     morehosts __P((void));
  97 int      tcmp __P((const void *, const void *));
  98 int      ucmp __P((const void *, const void *));
  99 void     usage __P((void));
 100
 101 int
 102 main(argc, argv)
 103         int argc;
 104         char **argv;
 105 {
 106         extern int optind;
 107         struct dirent *dp;
 108         struct hs *hsp;
 109         struct whod *wd;
 110         struct whoent *we;
 111         DIR *dirp;
 112         size_t hspace;
 113         int aflg, cc, ch, fd, i, maxloadav;
 114         char buf[sizeof(struct whod)];
 115         int (*cmp) __P((const void *, const void *));
 116
 117         aflg = 0;
 118         cmp = hscmp;
 119         while ((ch = getopt(argc, argv, "alrut")) != EOF)
 120                 switch (ch) {
 121                 case 'a':
 122                         aflg = 1;
 123                         break;
 124                 case 'l':
 125                         cmp = lcmp;
 126                         break;
 127                 case 'r':
 128                         rflg = -1;
 129                         break;
 130                 case 't':
 131                         cmp = tcmp;
 132                         break;
 133                 case 'u':
 134                         cmp = ucmp;
 135                         break;
 136                 default:
 137                         usage();
 138                 }
 139         argc -= optind;
 140         argv += optind;
 141
 142         if (argc != 0)
 143                 usage();
 144
 145         if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL)
 146                 err(1, "%s", _PATH_RWHODIR);
 147
 148         maxloadav = -1;
 149         for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) {
 150                 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
 151                         continue;
 152                 if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) {
 153                         warn("%s", dp->d_name);
 154                         continue;
 155                 }
 156                 cc = read(fd, buf, sizeof(struct whod));
 157                 (void)close(fd);
 158
 159                 if (cc < WHDRSIZE)
 160                         continue;
 161                 if (nhosts == hspace) {
 162                         if ((hs =
 163                             realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL)
 164                                 err(1, NULL);
 165                         hsp = hs + nhosts;
 166                 }
 167
 168                 if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL)
 169                         err(1, NULL);
 170                 memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE);
 171
 172                 for (wd = (struct whod *)buf, i = 0; i < 2; ++i)
 173                         if (wd->wd_loadav[i] > maxloadav)
 174                                 maxloadav = wd->wd_loadav[i];
 175
 176                 for (hsp->hs_nusers = 0,
 177                     we = (struct whoent *)(buf + cc); --we >= wd->wd_we;)
 178                         if (aflg || we->we_idle < 3600)
 179                                 ++hsp->hs_nusers;
 180                 ++hsp;
 181                 ++nhosts;
 182         }
 183         if (nhosts == 0)
 184                 errx(0, "no hosts in %s.", _PATH_RWHODIR);
 185
 186         (void)time(&now);
 187         qsort(hs, nhosts, sizeof(hs[0]), cmp);
 188         for (i = 0; i < nhosts; i++) {
 189                 hsp = &hs[i];
 190                 if (ISDOWN(hsp)) {
 191                         (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname,
 192                             interval(now - hsp->hs_wd->wd_recvtime, "down"));
 193                         continue;
 194                 }
 195                 (void)printf(
 196                     "%-12.12s%s,  %4d user%s  load %*.2f, %*.2f, %*.2f\n",
 197                     hsp->hs_wd->wd_hostname,
 198                     interval((time_t)hsp->hs_wd->wd_sendtime -
 199                         (time_t)hsp->hs_wd->wd_boottime, "  up"),
 200                     hsp->hs_nusers,
 201                     hsp->hs_nusers == 1 ? ", " : "s,",
 202                     maxloadav >= 1000 ? 5 : 4,
 203                         hsp->hs_wd->wd_loadav[0] / 100.0,
 204                     maxloadav >= 1000 ? 5 : 4,
 205                         hsp->hs_wd->wd_loadav[1] / 100.0,
 206                     maxloadav >= 1000 ? 5 : 4,
 207                         hsp->hs_wd->wd_loadav[2] / 100.0);
 208         }
 209         exit(0);
 210 }
 211
 212 char *
 213 interval(tval, updown)
 214         time_t tval;
 215         char *updown;
 216 {
 217         static char resbuf[32];
 218         int days, hours, minutes;
 219
 220         if (tval < 0 || tval > DAYSPERNYEAR * SECSPERDAY) {
 221                 (void)snprintf(resbuf, sizeof(resbuf), "   %s ??:??", updown);
 222                 return (resbuf);
 223         }
 224                                                 /* round to minutes. */
 225         minutes = (tval + (SECSPERMIN - 1)) / SECSPERMIN;
 226         hours = minutes / MINSPERHOUR;
 227         minutes %= MINSPERHOUR;
 228         days = hours / HOURSPERDAY;
 229         hours %= HOURSPERDAY;
 230         if (days)
 231                 (void)snprintf(resbuf, sizeof(resbuf),
 232                     "%s %2d+%02d:%02d", updown, days, hours, minutes);
 233         else
 234                 (void)snprintf(resbuf, sizeof(resbuf),
 235                     "%s    %2d:%02d", updown, hours, minutes);
 236         return (resbuf);
 237 }
 238
 239 #define HS(a)   ((struct hs *)(a))
 240
 241 /* Alphabetical comparison. */
 242 int
 243 hscmp(a1, a2)
 244         const void *a1, *a2;
 245 {
 246         return (rflg *
 247             strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname));
 248 }
 249
 250 /* Load average comparison. */
 251 int
 252 lcmp(a1, a2)
 253         const void *a1, *a2;
 254 {
 255         if (ISDOWN(HS(a1)))
 256                 if (ISDOWN(HS(a2)))
 257                         return (tcmp(a1, a2));
 258                 else
 259                         return (rflg);
 260         else if (ISDOWN(HS(a2)))
 261                 return (-rflg);
 262         else
 263                 return (rflg *
 264                    (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0]));
 265 }
 266
 267 /* Number of users comparison. */
 268 int
 269 ucmp(a1, a2)
 270         const void *a1, *a2;
 271 {
 272         if (ISDOWN(HS(a1)))
 273                 if (ISDOWN(HS(a2)))
 274                         return (tcmp(a1, a2));
 275                 else
 276                         return (rflg);
 277         else if (ISDOWN(HS(a2)))
 278                 return (-rflg);
 279         else
 280                 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers));
 281 }
 282
 283 /* Uptime comparison. */
 284 int
 285 tcmp(a1, a2)
 286         const void *a1, *a2;
 287 {
 288         return (rflg * (
 289                 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now
 290                     : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime)
 291                 -
 292                 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now
 293                     : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime)
 294         ));
 295 }
 296
 297 void
 298 usage()
 299 {
 300         (void)fprintf(stderr, "usage: ruptime [-alrut]\n");
 301         exit(1);
 302 }