1 /* 2 * Copyright (c) 1983, 1993, 1994 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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1983, 1993, 1994 The Regents of the University of California. All rights reserved. 34 * @(#)ruptime.c 8.2 (Berkeley) 4/5/94 35 * $FreeBSD: src/usr.bin/ruptime/ruptime.c,v 1.12.2.1 2000/06/30 09:45:00 ps Exp $ 36 * $DragonFly: src/usr.bin/ruptime/ruptime.c,v 1.3 2003/11/03 19:31:32 eirikn Exp $ 37 */ 38 39 #include <sys/param.h> 40 41 #include <protocols/rwhod.h> 42 43 #include <dirent.h> 44 #include <err.h> 45 #include <errno.h> 46 #include <fcntl.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <time.h> 51 #include <unistd.h> 52 53 struct hs { 54 struct whod *hs_wd; 55 int hs_nusers; 56 } *hs; 57 struct whod awhod; 58 #define LEFTEARTH(h) (now - (h)->hs_wd->wd_recvtime > 4*24*60*60) 59 #define ISDOWN(h) (now - (h)->hs_wd->wd_recvtime > 11 * 60) 60 #define WHDRSIZE (sizeof (awhod) - sizeof (awhod.wd_we)) 61 62 size_t nhosts; 63 time_t now; 64 int rflg = 1; 65 66 int hscmp(const void *, const void *); 67 char *interval(time_t, char *); 68 int lcmp(const void *, const void *); 69 void morehosts(void); 70 int tcmp(const void *, const void *); 71 int ucmp(const void *, const void *); 72 void usage(void); 73 74 int 75 main(argc, argv) 76 int argc; 77 char **argv; 78 { 79 struct dirent *dp; 80 struct hs *hsp; 81 struct whod *wd; 82 struct whoent *we; 83 DIR *dirp; 84 size_t hspace; 85 int aflg, cc, ch, fd, i, maxloadav; 86 char buf[sizeof(struct whod)]; 87 int (*cmp)(const void *, const void *); 88 89 aflg = 0; 90 cmp = hscmp; 91 while ((ch = getopt(argc, argv, "alrut")) != -1) 92 switch (ch) { 93 case 'a': 94 aflg = 1; 95 break; 96 case 'l': 97 cmp = lcmp; 98 break; 99 case 'r': 100 rflg = -1; 101 break; 102 case 't': 103 cmp = tcmp; 104 break; 105 case 'u': 106 cmp = ucmp; 107 break; 108 default: 109 usage(); 110 } 111 argc -= optind; 112 argv += optind; 113 114 if (argc != 0) 115 usage(); 116 117 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) 118 err(1, "%s", _PATH_RWHODIR); 119 120 maxloadav = -1; 121 for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) { 122 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) 123 continue; 124 if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) { 125 warn("%s", dp->d_name); 126 continue; 127 } 128 cc = read(fd, buf, sizeof(struct whod)); 129 (void)close(fd); 130 131 if (cc < WHDRSIZE) 132 continue; 133 if (nhosts == hspace) { 134 if ((hs = 135 realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL) 136 err(1, NULL); 137 hsp = hs + nhosts; 138 } 139 140 if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL) 141 err(1, NULL); 142 memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE); 143 144 for (wd = (struct whod *)buf, i = 0; i < 2; ++i) 145 if (wd->wd_loadav[i] > maxloadav) 146 maxloadav = wd->wd_loadav[i]; 147 148 for (hsp->hs_nusers = 0, 149 we = (struct whoent *)(buf + cc); --we >= wd->wd_we;) 150 if (aflg || we->we_idle < 3600) 151 ++hsp->hs_nusers; 152 ++hsp; 153 ++nhosts; 154 } 155 if (nhosts == 0) 156 errx(1, "no hosts in %s", _PATH_RWHODIR); 157 158 (void)time(&now); 159 qsort(hs, nhosts, sizeof(hs[0]), cmp); 160 for (i = 0; i < nhosts; i++) { 161 hsp = &hs[i]; 162 if (LEFTEARTH(hsp)) 163 continue; 164 if (ISDOWN(hsp)) { 165 (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname, 166 interval(now - hsp->hs_wd->wd_recvtime, "down")); 167 continue; 168 } 169 (void)printf( 170 "%-12.12s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n", 171 hsp->hs_wd->wd_hostname, 172 interval((time_t)hsp->hs_wd->wd_sendtime - 173 (time_t)hsp->hs_wd->wd_boottime, " up"), 174 hsp->hs_nusers, 175 hsp->hs_nusers == 1 ? ", " : "s,", 176 maxloadav >= 1000 ? 5 : 4, 177 hsp->hs_wd->wd_loadav[0] / 100.0, 178 maxloadav >= 1000 ? 5 : 4, 179 hsp->hs_wd->wd_loadav[1] / 100.0, 180 maxloadav >= 1000 ? 5 : 4, 181 hsp->hs_wd->wd_loadav[2] / 100.0); 182 } 183 exit(0); 184 } 185 186 char * 187 interval(tval, updown) 188 time_t tval; 189 char *updown; 190 { 191 static char resbuf[32]; 192 int days, hours, minutes; 193 194 if (tval < 0) { 195 (void)snprintf(resbuf, sizeof(resbuf), " %s ??:??", updown); 196 return (resbuf); 197 } 198 /* round to minutes. */ 199 minutes = (tval + (60 - 1)) / 60; 200 hours = minutes / 60; 201 minutes %= 60; 202 days = hours / 24; 203 hours %= 24; 204 if (days) 205 (void)snprintf(resbuf, sizeof(resbuf), 206 "%s %3d+%02d:%02d", updown, days, hours, minutes); 207 else 208 (void)snprintf(resbuf, sizeof(resbuf), 209 "%s %2d:%02d", updown, hours, minutes); 210 return (resbuf); 211 } 212 213 #define HS(a) ((struct hs *)(a)) 214 215 /* Alphabetical comparison. */ 216 int 217 hscmp(a1, a2) 218 const void *a1, *a2; 219 { 220 return (rflg * 221 strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname)); 222 } 223 224 /* Load average comparison. */ 225 int 226 lcmp(a1, a2) 227 const void *a1, *a2; 228 { 229 if (ISDOWN(HS(a1))) 230 if (ISDOWN(HS(a2))) 231 return (tcmp(a1, a2)); 232 else 233 return (rflg); 234 else if (ISDOWN(HS(a2))) 235 return (-rflg); 236 else 237 return (rflg * 238 (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0])); 239 } 240 241 /* Number of users comparison. */ 242 int 243 ucmp(a1, a2) 244 const void *a1, *a2; 245 { 246 if (ISDOWN(HS(a1))) 247 if (ISDOWN(HS(a2))) 248 return (tcmp(a1, a2)); 249 else 250 return (rflg); 251 else if (ISDOWN(HS(a2))) 252 return (-rflg); 253 else 254 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers)); 255 } 256 257 /* Uptime comparison. */ 258 int 259 tcmp(a1, a2) 260 const void *a1, *a2; 261 { 262 return (rflg * ( 263 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now 264 : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime) 265 - 266 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now 267 : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime) 268 )); 269 } 270 271 void 272 usage() 273 { 274 (void)fprintf(stderr, "usage: ruptime [-alrut]\n"); 275 exit(1); 276 } 277