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 1.11 2005/09/12 14:35:51 liamfoy 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 58 #define LEFTEARTH(h) (now - (h) > 4*24*60*60) 59 #define ISDOWN(h) (now - (h)->hs_wd->wd_recvtime > 11 * 60) 60 #define WHDRSIZE (sizeof(struct whod) - \ 61 sizeof(((struct whod *)NULL)->wd_we)) 62 63 size_t nhosts; 64 time_t now; 65 int rflg = 1; 66 67 int hscmp(const void *, const void *); 68 char *interval(time_t, const char *); 69 int lcmp(const void *, const void *); 70 void morehosts(void); 71 int tcmp(const void *, const void *); 72 int ucmp(const void *, const void *); 73 void usage(void); 74 75 int 76 main(int argc, char *argv[]) 77 { 78 struct dirent *dp; 79 struct hs *hsp = NULL; 80 struct whod *wd; 81 struct whoent *we; 82 DIR *dirp; 83 size_t hspace; 84 int aflg, ch, fd, maxloadav; 85 char buf[sizeof(struct whod)]; 86 int (*cmp)(const void *, const void *); 87 u_int cc, i; 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 (LEFTEARTH(((struct whod *)buf)->wd_recvtime)) 134 continue; 135 if (nhosts == hspace) { 136 hspace += 40; 137 if ((hs = realloc(hs, hspace * sizeof(*hs))) == NULL) 138 err(1, NULL); 139 hsp = hs + nhosts; 140 } 141 142 if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL) 143 err(1, NULL); 144 memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE); 145 146 for (wd = (struct whod *)buf, i = 0; i < 2; ++i) 147 if (wd->wd_loadav[i] > maxloadav) 148 maxloadav = wd->wd_loadav[i]; 149 150 for (hsp->hs_nusers = 0, 151 we = (struct whoent *)(buf + cc); --we >= wd->wd_we;) 152 if (aflg || we->we_idle < 3600) 153 ++hsp->hs_nusers; 154 ++hsp; 155 ++nhosts; 156 } 157 if (nhosts == 0) 158 errx(1, "no hosts in %s", _PATH_RWHODIR); 159 160 (void)time(&now); 161 qsort(hs, nhosts, sizeof(hs[0]), cmp); 162 for (i = 0; i < nhosts; i++) { 163 hsp = &hs[i]; 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(time_t tval, const char *updown) 188 { 189 static char resbuf[32]; 190 int days, hours, minutes; 191 192 if (tval < 0) { 193 (void)snprintf(resbuf, sizeof(resbuf), " %s ??:??", updown); 194 return (resbuf); 195 } 196 /* round to minutes. */ 197 minutes = (tval + (60 - 1)) / 60; 198 hours = minutes / 60; 199 minutes %= 60; 200 days = hours / 24; 201 hours %= 24; 202 if (days) 203 (void)snprintf(resbuf, sizeof(resbuf), 204 "%s %3d+%02d:%02d", updown, days, hours, minutes); 205 else 206 (void)snprintf(resbuf, sizeof(resbuf), 207 "%s %2d:%02d", updown, hours, minutes); 208 return (resbuf); 209 } 210 211 #define HS(a) ((const struct hs *)(a)) 212 213 /* Alphabetical comparison. */ 214 int 215 hscmp(const void *a1, const void *a2) 216 { 217 return (rflg * 218 strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname)); 219 } 220 221 /* Load average comparison. */ 222 int 223 lcmp(const void *a1, const void *a2) 224 { 225 if (ISDOWN(HS(a1))) 226 if (ISDOWN(HS(a2))) 227 return (tcmp(a1, a2)); 228 else 229 return (rflg); 230 else if (ISDOWN(HS(a2))) 231 return (-rflg); 232 else 233 return (rflg * 234 (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0])); 235 } 236 237 /* Number of users comparison. */ 238 int 239 ucmp(const void *a1, const void *a2) 240 { 241 if (ISDOWN(HS(a1))) 242 if (ISDOWN(HS(a2))) 243 return (tcmp(a1, a2)); 244 else 245 return (rflg); 246 else if (ISDOWN(HS(a2))) 247 return (-rflg); 248 else 249 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers)); 250 } 251 252 /* Uptime comparison. */ 253 int 254 tcmp(const void *a1, const void *a2) 255 { 256 return (rflg * ( 257 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now 258 : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime) 259 - 260 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now 261 : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime) 262 )); 263 } 264 265 void 266 usage(void) 267 { 268 (void)fprintf(stderr, "usage: ruptime [-alrut]\n"); 269 exit(1); 270 } 271