| 1 | /* |
| 2 | * Copyright (c) 1983 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms are permitted |
| 6 | * provided that the above copyright notice and this paragraph are |
| 7 | * duplicated in all such forms and that any documentation, |
| 8 | * advertising materials, and other materials related to such |
| 9 | * distribution and use acknowledge that the software was developed |
| 10 | * by the University of California, Berkeley. The name of the |
| 11 | * University may not be used to endorse or promote products derived |
| 12 | * from this software without specific prior written permission. |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 16 | */ |
| 17 | |
| 18 | #ifndef lint |
| 19 | char copyright[] = |
| 20 | "@(#) Copyright (c) 1983 The Regents of the University of California.\n\ |
| 21 | All rights reserved.\n"; |
| 22 | #endif /* not lint */ |
| 23 | |
| 24 | #ifndef lint |
| 25 | static char sccsid[] = "@(#)ruptime.c 5.6 (Berkeley) %G%"; |
| 26 | #endif /* not lint */ |
| 27 | |
| 28 | #include <sys/param.h> |
| 29 | #include <sys/dir.h> |
| 30 | #include <sys/file.h> |
| 31 | #include <protocols/rwhod.h> |
| 32 | #include <stdio.h> |
| 33 | |
| 34 | #define NHOSTS 100 |
| 35 | int nhosts; |
| 36 | struct hs { |
| 37 | struct whod *hs_wd; |
| 38 | int hs_nusers; |
| 39 | } hs[NHOSTS]; |
| 40 | struct whod awhod; |
| 41 | |
| 42 | #define WHDRSIZE (sizeof (awhod) - sizeof (awhod.wd_we)) |
| 43 | #define down(h) (now - (h)->hs_wd->wd_recvtime > 11 * 60) |
| 44 | |
| 45 | time_t now; |
| 46 | int rflg = 1; |
| 47 | int hscmp(), ucmp(), lcmp(), tcmp(); |
| 48 | |
| 49 | main(argc, argv) |
| 50 | int argc; |
| 51 | char **argv; |
| 52 | { |
| 53 | extern char *optarg; |
| 54 | extern int optind; |
| 55 | register struct hs *hsp = hs; |
| 56 | register struct whod *wd; |
| 57 | register struct whoent *we; |
| 58 | register DIR *dirp; |
| 59 | struct direct *dp; |
| 60 | int aflg, cc, ch, f, i, maxloadav; |
| 61 | char buf[sizeof(struct whod)]; |
| 62 | int (*cmp)() = hscmp; |
| 63 | time_t time(); |
| 64 | char *interval(), *malloc(); |
| 65 | |
| 66 | aflg = 0; |
| 67 | maxloadav = -1; |
| 68 | while ((ch = getopt(argc, argv, "alrut")) != EOF) |
| 69 | switch((char)ch) { |
| 70 | case 'a': |
| 71 | aflg = 1; |
| 72 | break; |
| 73 | case 'l': |
| 74 | cmp = lcmp; |
| 75 | break; |
| 76 | case 'r': |
| 77 | rflg = -1; |
| 78 | break; |
| 79 | case 't': |
| 80 | cmp = tcmp; |
| 81 | break; |
| 82 | case 'u': |
| 83 | cmp = ucmp; |
| 84 | break; |
| 85 | default: |
| 86 | fprintf(stderr, "usage: ruptime [-alrut]\n"); |
| 87 | exit(1); |
| 88 | } |
| 89 | |
| 90 | if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) { |
| 91 | perror(_PATH_RWHODIR); |
| 92 | exit(1); |
| 93 | } |
| 94 | while (dp = readdir(dirp)) { |
| 95 | if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) |
| 96 | continue; |
| 97 | if (nhosts == NHOSTS) { |
| 98 | fprintf(stderr, "ruptime: too many hosts\n"); |
| 99 | exit(1); |
| 100 | } |
| 101 | f = open(dp->d_name, O_RDONLY, 0); |
| 102 | if (f > 0) { |
| 103 | cc = read(f, buf, sizeof(struct whod)); |
| 104 | if (cc >= WHDRSIZE) { |
| 105 | /* NOSTRICT */ |
| 106 | hsp->hs_wd = (struct whod *)malloc(WHDRSIZE); |
| 107 | wd = (struct whod *)buf; |
| 108 | bcopy(wd, hsp->hs_wd, WHDRSIZE); |
| 109 | hsp->hs_nusers = 0; |
| 110 | for (i = 0; i < 2; i++) |
| 111 | if (wd->wd_loadav[i] > maxloadav) |
| 112 | maxloadav = wd->wd_loadav[i]; |
| 113 | we = (struct whoent *)(buf+cc); |
| 114 | while (--we >= wd->wd_we) |
| 115 | if (aflg || we->we_idle < 3600) |
| 116 | hsp->hs_nusers++; |
| 117 | nhosts++; hsp++; |
| 118 | } |
| 119 | (void)close(f); |
| 120 | } |
| 121 | } |
| 122 | if (!nhosts) { |
| 123 | printf("ruptime: no hosts!?!\n"); |
| 124 | exit(1); |
| 125 | } |
| 126 | qsort((char *)hs, nhosts, sizeof (hs[0]), cmp); |
| 127 | (void)time(&now); |
| 128 | for (i = 0; i < nhosts; i++) { |
| 129 | hsp = &hs[i]; |
| 130 | if (down(hsp)) { |
| 131 | printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname, |
| 132 | interval(now - hsp->hs_wd->wd_recvtime, "down")); |
| 133 | continue; |
| 134 | } |
| 135 | printf("%-12.12s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n", |
| 136 | hsp->hs_wd->wd_hostname, |
| 137 | interval(hsp->hs_wd->wd_sendtime - |
| 138 | hsp->hs_wd->wd_boottime, " up"), |
| 139 | hsp->hs_nusers, |
| 140 | hsp->hs_nusers == 1 ? ", " : "s,", |
| 141 | maxloadav >= 1000 ? 5 : 4, |
| 142 | hsp->hs_wd->wd_loadav[0] / 100.0, |
| 143 | maxloadav >= 1000 ? 5 : 4, |
| 144 | hsp->hs_wd->wd_loadav[1] / 100.0, |
| 145 | maxloadav >= 1000 ? 5 : 4, |
| 146 | hsp->hs_wd->wd_loadav[2] / 100.0); |
| 147 | cfree(hsp->hs_wd); |
| 148 | } |
| 149 | exit(0); |
| 150 | } |
| 151 | |
| 152 | char * |
| 153 | interval(tval, updown) |
| 154 | time_t tval; |
| 155 | char *updown; |
| 156 | { |
| 157 | static char resbuf[32]; |
| 158 | int days, hours, minutes; |
| 159 | |
| 160 | if (tval < 0 || tval > 365*24*60*60) { |
| 161 | (void)sprintf(resbuf, " %s ??:??", updown); |
| 162 | return(resbuf); |
| 163 | } |
| 164 | minutes = (tval + 59) / 60; /* round to minutes */ |
| 165 | hours = minutes / 60; minutes %= 60; |
| 166 | days = hours / 24; hours %= 24; |
| 167 | if (days) |
| 168 | (void)sprintf(resbuf, "%s %2d+%02d:%02d", |
| 169 | updown, days, hours, minutes); |
| 170 | else |
| 171 | (void)sprintf(resbuf, "%s %2d:%02d", |
| 172 | updown, hours, minutes); |
| 173 | return(resbuf); |
| 174 | } |
| 175 | |
| 176 | hscmp(h1, h2) |
| 177 | struct hs *h1, *h2; |
| 178 | { |
| 179 | return(rflg * strcmp(h1->hs_wd->wd_hostname, h2->hs_wd->wd_hostname)); |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | * Compare according to load average. |
| 184 | */ |
| 185 | lcmp(h1, h2) |
| 186 | struct hs *h1, *h2; |
| 187 | { |
| 188 | if (down(h1)) |
| 189 | if (down(h2)) |
| 190 | return(tcmp(h1, h2)); |
| 191 | else |
| 192 | return(rflg); |
| 193 | else if (down(h2)) |
| 194 | return(-rflg); |
| 195 | else |
| 196 | return(rflg * |
| 197 | (h2->hs_wd->wd_loadav[0] - h1->hs_wd->wd_loadav[0])); |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * Compare according to number of users. |
| 202 | */ |
| 203 | ucmp(h1, h2) |
| 204 | struct hs *h1, *h2; |
| 205 | { |
| 206 | if (down(h1)) |
| 207 | if (down(h2)) |
| 208 | return(tcmp(h1, h2)); |
| 209 | else |
| 210 | return(rflg); |
| 211 | else if (down(h2)) |
| 212 | return(-rflg); |
| 213 | else |
| 214 | return(rflg * (h2->hs_nusers - h1->hs_nusers)); |
| 215 | } |
| 216 | |
| 217 | /* |
| 218 | * Compare according to uptime. |
| 219 | */ |
| 220 | tcmp(h1, h2) |
| 221 | struct hs *h1, *h2; |
| 222 | { |
| 223 | return(rflg * ( |
| 224 | (down(h2) ? h2->hs_wd->wd_recvtime - now |
| 225 | : h2->hs_wd->wd_sendtime - h2->hs_wd->wd_boottime) |
| 226 | - |
| 227 | (down(h1) ? h1->hs_wd->wd_recvtime - now |
| 228 | : h1->hs_wd->wd_sendtime - h1->hs_wd->wd_boottime) |
| 229 | )); |
| 230 | } |