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 1.8 2005/01/05 00:33:50 cpressey 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, const 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(int argc, char *argv[]) 76 { 77 struct dirent *dp; 78 struct hs *hsp = NULL; 79 struct whod *wd; 80 struct whoent *we; 81 DIR *dirp; 82 size_t hspace; 83 int aflg, ch, fd, maxloadav; 84 char buf[sizeof(struct whod)]; 85 int (*cmp)(const void *, const void *); 86 u_int cc, i; 87 88 aflg = 0; 89 cmp = hscmp; 90 while ((ch = getopt(argc, argv, "alrut")) != -1) 91 switch (ch) { 92 case 'a': 93 aflg = 1; 94 break; 95 case 'l': 96 cmp = lcmp; 97 break; 98 case 'r': 99 rflg = -1; 100 break; 101 case 't': 102 cmp = tcmp; 103 break; 104 case 'u': 105 cmp = ucmp; 106 break; 107 default: 108 usage(); 109 } 110 argc -= optind; 111 argv += optind; 112 113 if (argc != 0) 114 usage(); 115 116 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) 117 err(1, "%s", _PATH_RWHODIR); 118 119 maxloadav = -1; 120 for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) { 121 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) 122 continue; 123 if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) { 124 warn("%s", dp->d_name); 125 continue; 126 } 127 cc = read(fd, buf, sizeof(struct whod)); 128 (void)close(fd); 129 130 if (cc < WHDRSIZE) 131 continue; 132 if (nhosts == hspace) { 133 if ((hs = 134 realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL) 135 err(1, NULL); 136 hsp = hs + nhosts; 137 } 138 139 if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL) 140 err(1, NULL); 141 memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE); 142 143 for (wd = (struct whod *)buf, i = 0; i < 2; ++i) 144 if (wd->wd_loadav[i] > maxloadav) 145 maxloadav = wd->wd_loadav[i]; 146 147 for (hsp->hs_nusers = 0, 148 we = (struct whoent *)(buf + cc); --we >= wd->wd_we;) 149 if (aflg || we->we_idle < 3600) 150 ++hsp->hs_nusers; 151 ++hsp; 152 ++nhosts; 153 } 154 if (nhosts == 0) 155 errx(1, "no hosts in %s", _PATH_RWHODIR); 156 157 (void)time(&now); 158 qsort(hs, nhosts, sizeof(hs[0]), cmp); 159 for (i = 0; i < nhosts; i++) { 160 hsp = &hs[i]; 161 if (LEFTEARTH(hsp)) 162 continue; 163 if (ISDOWN(hsp)) { 164 (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname, 165 interval(now - hsp->hs_wd->wd_recvtime, "down")); 166 continue; 167 } 168 (void)printf( 169 "%-12.12s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n", 170 hsp->hs_wd->wd_hostname, 171 interval((time_t)hsp->hs_wd->wd_sendtime - 172 (time_t)hsp->hs_wd->wd_boottime, " up"), 173 hsp->hs_nusers, 174 hsp->hs_nusers == 1 ? ", " : "s,", 175 maxloadav >= 1000 ? 5 : 4, 176 hsp->hs_wd->wd_loadav[0] / 100.0, 177 maxloadav >= 1000 ? 5 : 4, 178 hsp->hs_wd->wd_loadav[1] / 100.0, 179 maxloadav >= 1000 ? 5 : 4, 180 hsp->hs_wd->wd_loadav[2] / 100.0); 181 } 182 exit(0); 183 } 184 185 char * 186 interval(time_t tval, const char *updown) 187 { 188 static char resbuf[32]; 189 int days, hours, minutes; 190 191 if (tval < 0) { 192 (void)snprintf(resbuf, sizeof(resbuf), " %s ??:??", updown); 193 return (resbuf); 194 } 195 /* round to minutes. */ 196 minutes = (tval + (60 - 1)) / 60; 197 hours = minutes / 60; 198 minutes %= 60; 199 days = hours / 24; 200 hours %= 24; 201 if (days) 202 (void)snprintf(resbuf, sizeof(resbuf), 203 "%s %3d+%02d:%02d", updown, days, hours, minutes); 204 else 205 (void)snprintf(resbuf, sizeof(resbuf), 206 "%s %2d:%02d", updown, hours, minutes); 207 return (resbuf); 208 } 209 210 #define HS(a) ((const struct hs *)(a)) 211 212 /* Alphabetical comparison. */ 213 int 214 hscmp(const void *a1, const void *a2) 215 { 216 return (rflg * 217 strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname)); 218 } 219 220 /* Load average comparison. */ 221 int 222 lcmp(const void *a1, const void *a2) 223 { 224 if (ISDOWN(HS(a1))) 225 if (ISDOWN(HS(a2))) 226 return (tcmp(a1, a2)); 227 else 228 return (rflg); 229 else if (ISDOWN(HS(a2))) 230 return (-rflg); 231 else 232 return (rflg * 233 (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0])); 234 } 235 236 /* Number of users comparison. */ 237 int 238 ucmp(const void *a1, const void *a2) 239 { 240 if (ISDOWN(HS(a1))) 241 if (ISDOWN(HS(a2))) 242 return (tcmp(a1, a2)); 243 else 244 return (rflg); 245 else if (ISDOWN(HS(a2))) 246 return (-rflg); 247 else 248 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers)); 249 } 250 251 /* Uptime comparison. */ 252 int 253 tcmp(const void *a1, const void *a2) 254 { 255 return (rflg * ( 256 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now 257 : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime) 258 - 259 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now 260 : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime) 261 )); 262 } 263 264 void 265 usage(void) 266 { 267 (void)fprintf(stderr, "usage: ruptime [-alrut]\n"); 268 exit(1); 269 } 270