1 /* $NetBSD: ruptime.c,v 1.16 2025/09/19 05:07:38 mrg 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1983, 1993, 1994\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 /*static char sccsid[] = "from: @(#)ruptime.c 8.2 (Berkeley) 4/5/94";*/ 40 __RCSID("$NetBSD: ruptime.c,v 1.16 2025/09/19 05:07:38 mrg Exp $"); 41 #endif /* not lint */ 42 43 #include <sys/param.h> 44 45 #include <protocols/rwhod.h> 46 47 #include <dirent.h> 48 #include <err.h> 49 #include <errno.h> 50 #include <fcntl.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <time.h> 55 #include <tzfile.h> 56 #include <unistd.h> 57 58 static struct hs { 59 struct whod *hs_wd; 60 int hs_nusers; 61 } *hs; 62 63 #define ISDOWN(h) (now - (h)->hs_wd->wd_recvtime > 11 * 60) 64 #define WHDRSIZE (sizeof(struct whod) - \ 65 sizeof (((struct whod *)0)->wd_we)) 66 67 static size_t nhosts; 68 static time_t now; 69 static int rflg = 1; 70 71 static int hscmp(const void *, const void *); 72 static char *interval(time_t, const char *); 73 static int lcmp(const void *, const void *); 74 static int tcmp(const void *, const void *); 75 static int ucmp(const void *, const void *); 76 __dead static void usage(void); 77 78 int 79 main(int argc, char **argv) 80 { 81 struct dirent *dp; 82 struct hs *hsp; 83 struct whod *wd; 84 struct whoent *we; 85 DIR *dirp; 86 size_t hspace, i; 87 int aflg, cc, ch, fd, maxloadav; 88 char buf[sizeof(struct whod)]; 89 int (*cmp)(const void *, const void *); 90 91 hsp = NULL; 92 aflg = 0; 93 cmp = hscmp; 94 while ((ch = getopt(argc, argv, "alrtu")) != -1) 95 switch (ch) { 96 case 'a': 97 aflg = 1; 98 break; 99 case 'l': 100 cmp = lcmp; 101 break; 102 case 'r': 103 rflg = -1; 104 break; 105 case 't': 106 cmp = tcmp; 107 break; 108 case 'u': 109 cmp = ucmp; 110 break; 111 default: 112 usage(); 113 } 114 argc -= optind; 115 argv += optind; 116 117 if (argc != 0) 118 usage(); 119 120 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) 121 err(1, "%s", _PATH_RWHODIR); 122 123 maxloadav = -1; 124 for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) { 125 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) 126 continue; 127 if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) { 128 warn("%s", dp->d_name); 129 continue; 130 } 131 cc = read(fd, buf, sizeof(struct whod)); 132 (void)close(fd); 133 134 if (cc < (int)WHDRSIZE) 135 continue; 136 if (nhosts == hspace) { 137 if ((hs = 138 realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL) 139 err(1, "realloc"); 140 hsp = hs + nhosts; 141 } 142 143 if ((hsp->hs_wd = malloc(sizeof(*hsp->hs_wd))) == NULL) 144 err(1, "malloc"); 145 memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE); 146 147 for (wd = (struct whod *)buf, i = 0; i < 2; ++i) 148 if (wd->wd_loadav[i] > maxloadav) 149 maxloadav = wd->wd_loadav[i]; 150 151 for (hsp->hs_nusers = 0, 152 we = (struct whoent *)(buf + cc); --we >= wd->wd_we;) 153 if (aflg || we->we_idle < 3600) 154 ++hsp->hs_nusers; 155 ++hsp; 156 ++nhosts; 157 } 158 if (nhosts == 0) 159 errx(0, "no hosts in %s", _PATH_RWHODIR); 160 161 (void)time(&now); 162 qsort(hs, nhosts, sizeof (hs[0]), cmp); 163 for (i = 0; i < nhosts; i++) { 164 hsp = &hs[i]; 165 if (ISDOWN(hsp)) { 166 (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname, 167 interval(now - hsp->hs_wd->wd_recvtime, "down")); 168 continue; 169 } 170 (void)printf( 171 "%-12.12s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n", 172 hsp->hs_wd->wd_hostname, 173 interval((time_t)hsp->hs_wd->wd_sendtime - 174 (time_t)hsp->hs_wd->wd_boottime, " up"), 175 hsp->hs_nusers, 176 hsp->hs_nusers == 1 ? ", " : "s,", 177 maxloadav >= 1000 ? 5 : 4, 178 hsp->hs_wd->wd_loadav[0] / 100.0, 179 maxloadav >= 1000 ? 5 : 4, 180 hsp->hs_wd->wd_loadav[1] / 100.0, 181 maxloadav >= 1000 ? 5 : 4, 182 hsp->hs_wd->wd_loadav[2] / 100.0); 183 } 184 exit(0); 185 } 186 187 static char * 188 interval(time_t tval, const char *updown) 189 { 190 static char resbuf[32]; 191 int days, hours, minutes; 192 193 if (tval < 0) { 194 (void)snprintf(resbuf, sizeof(resbuf), " %s ??:??", updown); 195 return (resbuf); 196 } 197 /* round to minutes. */ 198 minutes = (tval + (SECSPERMIN - 1)) / SECSPERMIN; 199 hours = minutes / MINSPERHOUR; 200 minutes %= MINSPERHOUR; 201 days = hours / HOURSPERDAY; 202 hours %= HOURSPERDAY; 203 if (days) 204 (void)snprintf(resbuf, sizeof(resbuf), 205 "%s%4d+%02d:%02d", updown, days, hours, minutes); 206 else 207 (void)snprintf(resbuf, sizeof(resbuf), 208 "%s %2d:%02d", updown, hours, minutes); 209 return (resbuf); 210 } 211 212 #define HS(a) ((const struct hs *)(a)) 213 214 /* Alphabetical comparison. */ 215 static int 216 hscmp(const void *a1, const void *a2) 217 { 218 return (rflg * 219 strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname)); 220 } 221 222 /* Load average comparison. */ 223 static int 224 lcmp(const void *a1, const void *a2) 225 { 226 if (ISDOWN(HS(a1))) { 227 if (ISDOWN(HS(a2))) 228 return (tcmp(a1, a2)); 229 else 230 return (rflg); 231 } else if (ISDOWN(HS(a2))) { 232 return (-rflg); 233 } else 234 return (rflg * 235 (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0])); 236 } 237 238 /* Number of users comparison. */ 239 static int 240 ucmp(const void *a1, const void *a2) 241 { 242 if (ISDOWN(HS(a1))) { 243 if (ISDOWN(HS(a2))) 244 return (tcmp(a1, a2)); 245 else 246 return (rflg); 247 } else if (ISDOWN(HS(a2))) { 248 return (-rflg); 249 } else 250 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers)); 251 } 252 253 /* Uptime comparison. */ 254 static int 255 tcmp(const void *a1, const void *a2) 256 { 257 return (rflg * ( 258 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now 259 : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime) 260 - 261 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now 262 : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime) 263 )); 264 } 265 266 static void 267 usage(void) 268 { 269 (void)fprintf(stderr, "usage: ruptime [-alrtu]\n"); 270 exit(1); 271 } 272
Indexes created Sat Sep 20 22:09:52 GMT 2025