ruptime.tproj/ruptime.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1983, 1993, 1994
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  */
  56
  57
  58 #ifndef lint
  59 static char copyright[] =
  60 "@(#) Copyright (c) 1983, 1993, 1994\n\
  61         The Regents of the University of California.  All rights reserved.\n";
  62 #endif /* not lint */
  63
  64 #include <sys/param.h>
  65
  66 #include <protocols/rwhod.h>
  67
  68 #include <dirent.h>
  69 #include <err.h>
  70 #include <errno.h>
  71 #include <fcntl.h>
  72 #include <stdio.h>
  73 #include <stdlib.h>
  74 #include <string.h>
  75 #include <time.h>
  76 #include <tzfile.h>
  77 #include <unistd.h>
  78
  79 struct hs {
  80         struct  whod *hs_wd;
  81         int     hs_nusers;
  82 } *hs;
  83 struct  whod awhod;
  84
  85 #define ISDOWN(h)               (now - (h)->hs_wd->wd_recvtime > 11 * 60)
  86 #define WHDRSIZE        (sizeof (awhod) - sizeof (awhod.wd_we))
  87
  88 size_t nhosts;
  89 time_t now;
  90 int rflg = 1;
  91
  92 int      hscmp __P((const void *, const void *));
  93 char    *interval __P((time_t, char *));
  94 int      lcmp __P((const void *, const void *));
  95 void     morehosts __P((void));
  96 int      tcmp __P((const void *, const void *));
  97 int      ucmp __P((const void *, const void *));
  98 void     usage __P((void));
  99
 100 int
 101 main(argc, argv)
 102         int argc;
 103         char **argv;
 104 {
 105         extern int optind;
 106         struct dirent *dp;
 107         struct hs *hsp;
 108         struct whod *wd;
 109         struct whoent *we;
 110         DIR *dirp;
 111         size_t hspace;
 112         int aflg, cc, ch, fd, i, maxloadav;
 113         char buf[sizeof(struct whod)];
 114         int (*cmp) __P((const void *, const void *));
 115
 116         aflg = 0;
 117         cmp = hscmp;
 118         while ((ch = getopt(argc, argv, "alrut")) != EOF)
 119                 switch (ch) {
 120                 case 'a':
 121                         aflg = 1;
 122                         break;
 123                 case 'l':
 124                         cmp = lcmp;
 125                         break;
 126                 case 'r':
 127                         rflg = -1;
 128                         break;
 129                 case 't':
 130                         cmp = tcmp;
 131                         break;
 132                 case 'u':
 133                         cmp = ucmp;
 134                         break;
 135                 default:
 136                         usage();
 137                 }
 138         argc -= optind;
 139         argv += optind;
 140
 141         if (argc != 0)
 142                 usage();
 143
 144         if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL)
 145                 err(1, "%s", _PATH_RWHODIR);
 146
 147         maxloadav = -1;
 148         for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) {
 149                 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
 150                         continue;
 151                 if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) {
 152                         warn("%s", dp->d_name);
 153                         continue;
 154                 }
 155                 cc = read(fd, buf, sizeof(struct whod));
 156                 (void)close(fd);
 157
 158                 if (cc < WHDRSIZE)
 159                         continue;
 160                 if (nhosts == hspace) {
 161                         if ((hs =
 162                             realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL)
 163                                 err(1, NULL);
 164                         hsp = hs + nhosts;
 165                 }
 166
 167                 if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL)
 168                         err(1, NULL);
 169                 memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE);
 170
 171                 for (wd = (struct whod *)buf, i = 0; i < 2; ++i)
 172                         if (wd->wd_loadav[i] > maxloadav)
 173                                 maxloadav = wd->wd_loadav[i];
 174
 175                 for (hsp->hs_nusers = 0,
 176                     we = (struct whoent *)(buf + cc); --we >= wd->wd_we;)
 177                         if (aflg || we->we_idle < 3600)
 178                                 ++hsp->hs_nusers;
 179                 ++hsp;
 180                 ++nhosts;
 181         }
 182         if (nhosts == 0)
 183                 errx(0, "no hosts in %s.", _PATH_RWHODIR);
 184
 185         (void)time(&now);
 186         qsort(hs, nhosts, sizeof(hs[0]), cmp);
 187         for (i = 0; i < nhosts; i++) {
 188                 hsp = &hs[i];
 189                 if (ISDOWN(hsp)) {
 190                         (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname,
 191                             interval(now - hsp->hs_wd->wd_recvtime, "down"));
 192                         continue;
 193                 }
 194                 (void)printf(
 195                     "%-12.12s%s,  %4d user%s  load %*.2f, %*.2f, %*.2f\n",
 196                     hsp->hs_wd->wd_hostname,
 197                     interval((time_t)hsp->hs_wd->wd_sendtime -
 198                         (time_t)hsp->hs_wd->wd_boottime, "  up"),
 199                     hsp->hs_nusers,
 200                     hsp->hs_nusers == 1 ? ", " : "s,",
 201                     maxloadav >= 1000 ? 5 : 4,
 202                         hsp->hs_wd->wd_loadav[0] / 100.0,
 203                     maxloadav >= 1000 ? 5 : 4,
 204                         hsp->hs_wd->wd_loadav[1] / 100.0,
 205                     maxloadav >= 1000 ? 5 : 4,
 206                         hsp->hs_wd->wd_loadav[2] / 100.0);
 207         }
 208         exit(0);
 209 }
 210
 211 char *
 212 interval(tval, updown)
 213         time_t tval;
 214         char *updown;
 215 {
 216         static char resbuf[32];
 217         int days, hours, minutes;
 218
 219         if (tval < 0 || tval > DAYSPERNYEAR * SECSPERDAY) {
 220                 (void)snprintf(resbuf, sizeof(resbuf), "   %s ??:??", updown);
 221                 return (resbuf);
 222         }
 223                                                 /* round to minutes. */
 224         minutes = (tval + (SECSPERMIN - 1)) / SECSPERMIN;
 225         hours = minutes / MINSPERHOUR;
 226         minutes %= MINSPERHOUR;
 227         days = hours / HOURSPERDAY;
 228         hours %= HOURSPERDAY;
 229         if (days)
 230                 (void)snprintf(resbuf, sizeof(resbuf),
 231                     "%s %2d+%02d:%02d", updown, days, hours, minutes);
 232         else
 233                 (void)snprintf(resbuf, sizeof(resbuf),
 234                     "%s    %2d:%02d", updown, hours, minutes);
 235         return (resbuf);
 236 }
 237
 238 #define HS(a)   ((struct hs *)(a))
 239
 240 /* Alphabetical comparison. */
 241 int
 242 hscmp(a1, a2)
 243         const void *a1, *a2;
 244 {
 245         return (rflg *
 246             strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname));
 247 }
 248
 249 /* Load average comparison. */
 250 int
 251 lcmp(a1, a2)
 252         const void *a1, *a2;
 253 {
 254         if (ISDOWN(HS(a1)))
 255                 if (ISDOWN(HS(a2)))
 256                         return (tcmp(a1, a2));
 257                 else
 258                         return (rflg);
 259         else if (ISDOWN(HS(a2)))
 260                 return (-rflg);
 261         else
 262                 return (rflg *
 263                    (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0]));
 264 }
 265
 266 /* Number of users comparison. */
 267 int
 268 ucmp(a1, a2)
 269         const void *a1, *a2;
 270 {
 271         if (ISDOWN(HS(a1)))
 272                 if (ISDOWN(HS(a2)))
 273                         return (tcmp(a1, a2));
 274                 else
 275                         return (rflg);
 276         else if (ISDOWN(HS(a2)))
 277                 return (-rflg);
 278         else
 279                 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers));
 280 }
 281
 282 /* Uptime comparison. */
 283 int
 284 tcmp(a1, a2)
 285         const void *a1, *a2;
 286 {
 287         return (rflg * (
 288                 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now
 289                     : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime)
 290                 -
 291                 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now
 292                     : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime)
 293         ));
 294 }
 295
 296 void
 297 usage()
 298 {
 299         (void)fprintf(stderr, "usage: ruptime [-alrut]\n");
 300         exit(1);
 301 }