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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1983, 1993, 1994 The Regents of the University of California. All rights reserved. 30 * @(#)ruptime.c 8.2 (Berkeley) 4/5/94 31 * $FreeBSD: src/usr.bin/ruptime/ruptime.c,v 1.12.2.1 2000/06/30 09:45:00 ps Exp $ 32 * $DragonFly: src/usr.bin/ruptime/ruptime.c,v 1.11 2005/09/12 14:35:51 liamfoy Exp $ 33 */ 34 35 #include <sys/param.h> 36 37 #include <protocols/rwhod.h> 38 39 #include <dirent.h> 40 #include <err.h> 41 #include <errno.h> 42 #include <fcntl.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <time.h> 47 #include <unistd.h> 48 49 struct hs { 50 struct whod *hs_wd; 51 int hs_nusers; 52 } *hs; 53 54 #define LEFTEARTH(h) (now - (h) > 4*24*60*60) 55 #define ISDOWN(h) (now - (h)->hs_wd->wd_recvtime > 11 * 60) 56 #define WHDRSIZE (sizeof(struct whod) - \ 57 sizeof(((struct whod *)NULL)->wd_we)) 58 59 size_t nhosts; 60 time_t now; 61 int rflg = 1; 62 63 int hscmp(const void *, const void *); 64 char *interval(time_t, const char *); 65 int lcmp(const void *, const void *); 66 void morehosts(void); 67 int tcmp(const void *, const void *); 68 int ucmp(const void *, const void *); 69 void usage(void); 70 71 int 72 main(int argc, char *argv[]) 73 { 74 struct dirent *dp; 75 struct hs *hsp = NULL; 76 struct whod *wd; 77 struct whoent *we; 78 DIR *dirp; 79 size_t hspace; 80 int aflg, ch, fd, maxloadav; 81 char buf[sizeof(struct whod)]; 82 int (*cmp)(const void *, const void *); 83 u_int cc, i; 84 85 aflg = 0; 86 cmp = hscmp; 87 while ((ch = getopt(argc, argv, "alrut")) != -1) 88 switch (ch) { 89 case 'a': 90 aflg = 1; 91 break; 92 case 'l': 93 cmp = lcmp; 94 break; 95 case 'r': 96 rflg = -1; 97 break; 98 case 't': 99 cmp = tcmp; 100 break; 101 case 'u': 102 cmp = ucmp; 103 break; 104 default: 105 usage(); 106 } 107 argc -= optind; 108 argv += optind; 109 110 if (argc != 0) 111 usage(); 112 113 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) 114 err(1, "%s", _PATH_RWHODIR); 115 116 maxloadav = -1; 117 for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) { 118 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) 119 continue; 120 if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) { 121 warn("%s", dp->d_name); 122 continue; 123 } 124 cc = read(fd, buf, sizeof(struct whod)); 125 (void)close(fd); 126 127 if (cc < WHDRSIZE) 128 continue; 129 if (LEFTEARTH(((struct whod *)buf)->wd_recvtime)) 130 continue; 131 if (nhosts == hspace) { 132 hspace += 40; 133 if ((hs = realloc(hs, hspace * sizeof(*hs))) == NULL) 134 err(1, NULL); 135 hsp = hs + nhosts; 136 } 137 138 if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL) 139 err(1, NULL); 140 memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE); 141 142 for (wd = (struct whod *)buf, i = 0; i < 2; ++i) 143 if (wd->wd_loadav[i] > maxloadav) 144 maxloadav = wd->wd_loadav[i]; 145 146 for (hsp->hs_nusers = 0, 147 we = (struct whoent *)(buf + cc); --we >= wd->wd_we;) 148 if (aflg || we->we_idle < 3600) 149 ++hsp->hs_nusers; 150 ++hsp; 151 ++nhosts; 152 } 153 if (nhosts == 0) 154 errx(1, "no hosts in %s", _PATH_RWHODIR); 155 156 (void)time(&now); 157 qsort(hs, nhosts, sizeof(hs[0]), cmp); 158 for (i = 0; i < nhosts; i++) { 159 hsp = &hs[i]; 160 if (ISDOWN(hsp)) { 161 (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname, 162 interval(now - hsp->hs_wd->wd_recvtime, "down")); 163 continue; 164 } 165 (void)printf( 166 "%-12.12s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n", 167 hsp->hs_wd->wd_hostname, 168 interval((time_t)hsp->hs_wd->wd_sendtime - 169 (time_t)hsp->hs_wd->wd_boottime, " up"), 170 hsp->hs_nusers, 171 hsp->hs_nusers == 1 ? ", " : "s,", 172 maxloadav >= 1000 ? 5 : 4, 173 hsp->hs_wd->wd_loadav[0] / 100.0, 174 maxloadav >= 1000 ? 5 : 4, 175 hsp->hs_wd->wd_loadav[1] / 100.0, 176 maxloadav >= 1000 ? 5 : 4, 177 hsp->hs_wd->wd_loadav[2] / 100.0); 178 } 179 exit(0); 180 } 181 182 char * 183 interval(time_t tval, const char *updown) 184 { 185 static char resbuf[32]; 186 int days, hours, minutes; 187 188 if (tval < 0) { 189 (void)snprintf(resbuf, sizeof(resbuf), " %s ??:??", updown); 190 return (resbuf); 191 } 192 /* round to minutes. */ 193 minutes = (tval + (60 - 1)) / 60; 194 hours = minutes / 60; 195 minutes %= 60; 196 days = hours / 24; 197 hours %= 24; 198 if (days) 199 (void)snprintf(resbuf, sizeof(resbuf), 200 "%s %3d+%02d:%02d", updown, days, hours, minutes); 201 else 202 (void)snprintf(resbuf, sizeof(resbuf), 203 "%s %2d:%02d", updown, hours, minutes); 204 return (resbuf); 205 } 206 207 #define HS(a) ((const struct hs *)(a)) 208 209 /* Alphabetical comparison. */ 210 int 211 hscmp(const void *a1, const void *a2) 212 { 213 return (rflg * 214 strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname)); 215 } 216 217 /* Load average comparison. */ 218 int 219 lcmp(const void *a1, const void *a2) 220 { 221 if (ISDOWN(HS(a1))) 222 if (ISDOWN(HS(a2))) 223 return (tcmp(a1, a2)); 224 else 225 return (rflg); 226 else if (ISDOWN(HS(a2))) 227 return (-rflg); 228 else 229 return (rflg * 230 (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0])); 231 } 232 233 /* Number of users comparison. */ 234 int 235 ucmp(const void *a1, const void *a2) 236 { 237 if (ISDOWN(HS(a1))) 238 if (ISDOWN(HS(a2))) 239 return (tcmp(a1, a2)); 240 else 241 return (rflg); 242 else if (ISDOWN(HS(a2))) 243 return (-rflg); 244 else 245 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers)); 246 } 247 248 /* Uptime comparison. */ 249 int 250 tcmp(const void *a1, const void *a2) 251 { 252 return (rflg * ( 253 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now 254 : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime) 255 - 256 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now 257 : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime) 258 )); 259 } 260 261 void 262 usage(void) 263 { 264 (void)fprintf(stderr, "usage: ruptime [-alrut]\n"); 265 exit(1); 266 } 267