ruptime.tproj/ruptime.c

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