1 /* $NetBSD: ruptime.c,v 1.10 2001/01/05 07:14:46 mjl Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1983, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 /*static char sccsid[] = "from: @(#)ruptime.c 8.2 (Berkeley) 4/5/94";*/ 44 __RCSID("$NetBSD: ruptime.c,v 1.10 2001/01/05 07:14:46 mjl Exp $"); 45 #endif /* not lint */ 46 47 #include <sys/param.h> 48 49 #include <protocols/rwhod.h> 50 51 #include <dirent.h> 52 #include <err.h> 53 #include <errno.h> 54 #include <fcntl.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <time.h> 59 #include <tzfile.h> 60 #include <unistd.h> 61 62 struct hs { 63 struct whod *hs_wd; 64 int hs_nusers; 65 } *hs; 66 struct whod awhod; 67 68 #define ISDOWN(h) (now - (h)->hs_wd->wd_recvtime > 11 * 60) 69 #define WHDRSIZE (sizeof (awhod) - sizeof (awhod.wd_we)) 70 71 size_t nhosts; 72 time_t now; 73 int rflg = 1; 74 75 int hscmp(const void *, const void *); 76 char *interval(time_t, char *); 77 int lcmp(const void *, const void *); 78 int main(int, char **); 79 void morehosts(void); 80 int tcmp(const void *, const void *); 81 int ucmp(const void *, const void *); 82 void usage(void); 83 84 int 85 main(int argc, char **argv) 86 { 87 struct dirent *dp; 88 struct hs *hsp; 89 struct whod *wd; 90 struct whoent *we; 91 DIR *dirp; 92 size_t hspace; 93 int aflg, cc, ch, fd, i, maxloadav; 94 char buf[sizeof(struct whod)]; 95 int (*cmp)(const void *, const void *); 96 97 hsp = NULL; 98 aflg = 0; 99 cmp = hscmp; 100 while ((ch = getopt(argc, argv, "alrtu")) != -1) 101 switch (ch) { 102 case 'a': 103 aflg = 1; 104 break; 105 case 'l': 106 cmp = lcmp; 107 break; 108 case 'r': 109 rflg = -1; 110 break; 111 case 't': 112 cmp = tcmp; 113 break; 114 case 'u': 115 cmp = ucmp; 116 break; 117 default: 118 usage(); 119 } 120 argc -= optind; 121 argv += optind; 122 123 if (argc != 0) 124 usage(); 125 126 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) 127 err(1, "%s", _PATH_RWHODIR); 128 129 maxloadav = -1; 130 for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) { 131 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) 132 continue; 133 if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) { 134 warn("%s", dp->d_name); 135 continue; 136 } 137 cc = read(fd, buf, sizeof(struct whod)); 138 (void)close(fd); 139 140 if (cc < WHDRSIZE) 141 continue; 142 if (nhosts == hspace) { 143 if ((hs = 144 realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL) 145 err(1, "realloc"); 146 hsp = hs + nhosts; 147 } 148 149 if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL) 150 err(1, "malloc"); 151 memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE); 152 153 for (wd = (struct whod *)buf, i = 0; i < 2; ++i) 154 if (wd->wd_loadav[i] > maxloadav) 155 maxloadav = wd->wd_loadav[i]; 156 157 for (hsp->hs_nusers = 0, 158 we = (struct whoent *)(buf + cc); --we >= wd->wd_we;) 159 if (aflg || we->we_idle < 3600) 160 ++hsp->hs_nusers; 161 ++hsp; 162 ++nhosts; 163 } 164 if (nhosts == 0) 165 errx(0, "no hosts in %s", _PATH_RWHODIR); 166 167 (void)time(&now); 168 qsort(hs, nhosts, sizeof (hs[0]), cmp); 169 for (i = 0; i < nhosts; i++) { 170 hsp = &hs[i]; 171 if (ISDOWN(hsp)) { 172 (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname, 173 interval(now - hsp->hs_wd->wd_recvtime, "down")); 174 continue; 175 } 176 (void)printf( 177 "%-12.12s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n", 178 hsp->hs_wd->wd_hostname, 179 interval((time_t)hsp->hs_wd->wd_sendtime - 180 (time_t)hsp->hs_wd->wd_boottime, " up"), 181 hsp->hs_nusers, 182 hsp->hs_nusers == 1 ? ", " : "s,", 183 maxloadav >= 1000 ? 5 : 4, 184 hsp->hs_wd->wd_loadav[0] / 100.0, 185 maxloadav >= 1000 ? 5 : 4, 186 hsp->hs_wd->wd_loadav[1] / 100.0, 187 maxloadav >= 1000 ? 5 : 4, 188 hsp->hs_wd->wd_loadav[2] / 100.0); 189 } 190 exit(0); 191 } 192 193 char * 194 interval(time_t tval, char *updown) 195 { 196 static char resbuf[32]; 197 int days, hours, minutes; 198 199 if (tval < 0) { 200 (void)snprintf(resbuf, sizeof(resbuf), " %s ??:??", updown); 201 return (resbuf); 202 } 203 /* round to minutes. */ 204 minutes = (tval + (SECSPERMIN - 1)) / SECSPERMIN; 205 hours = minutes / MINSPERHOUR; 206 minutes %= MINSPERHOUR; 207 days = hours / HOURSPERDAY; 208 hours %= HOURSPERDAY; 209 if (days) 210 (void)snprintf(resbuf, sizeof(resbuf), 211 "%s%4d+%02d:%02d", updown, days, hours, minutes); 212 else 213 (void)snprintf(resbuf, sizeof(resbuf), 214 "%s %2d:%02d", updown, hours, minutes); 215 return (resbuf); 216 } 217 218 #define HS(a) ((struct hs *)(a)) 219 220 /* Alphabetical comparison. */ 221 int 222 hscmp(a1, a2) 223 const void *a1, *a2; 224 { 225 return (rflg * 226 strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname)); 227 } 228 229 /* Load average comparison. */ 230 int 231 lcmp(const void *a1, const void *a2) 232 { 233 if (ISDOWN(HS(a1))) { 234 if (ISDOWN(HS(a2))) 235 return (tcmp(a1, a2)); 236 else 237 return (rflg); 238 } else if (ISDOWN(HS(a2))) { 239 return (-rflg); 240 } else 241 return (rflg * 242 (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0])); 243 } 244 245 /* Number of users comparison. */ 246 int 247 ucmp(const void *a1, const void *a2) 248 { 249 if (ISDOWN(HS(a1))) { 250 if (ISDOWN(HS(a2))) 251 return (tcmp(a1, a2)); 252 else 253 return (rflg); 254 } else if (ISDOWN(HS(a2))) { 255 return (-rflg); 256 } else 257 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers)); 258 } 259 260 /* Uptime comparison. */ 261 int 262 tcmp(const void *a1, const void *a2) 263 { 264 return (rflg * ( 265 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now 266 : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime) 267 - 268 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now 269 : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime) 270 )); 271 } 272 273 void 274 usage(void) 275 { 276 (void)fprintf(stderr, "usage: ruptime [-alrtu]\n"); 277 exit(1); 278 } 279