ruptime.c revision 1.9
1 /* $NetBSD: ruptime.c,v 1.9 2000/12/31 17:35:20 ad 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 1.9 2000/12/31 17:35:20 ad 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 __P((const void *, const void *)); 76 char *interval __P((time_t, char *)); 77 int lcmp __P((const void *, const void *)); 78 int main __P((int, char **)); 79 void morehosts __P((void)); 80 int tcmp __P((const void *, const void *)); 81 int ucmp __P((const void *, const void *)); 82 void usage __P((void)); 83 84 int 85 main(argc, argv) 86 int argc; 87 char **argv; 88 { 89 struct dirent *dp; 90 struct hs *hsp; 91 struct whod *wd; 92 struct whoent *we; 93 DIR *dirp; 94 size_t hspace; 95 int aflg, cc, ch, fd, i, maxloadav; 96 char buf[sizeof(struct whod)]; 97 int (*cmp) __P((const void *, const void *)); 98 99 hsp = NULL; 100 aflg = 0; 101 cmp = hscmp; 102 while ((ch = getopt(argc, argv, "alrut")) != -1) 103 switch (ch) { 104 case 'a': 105 aflg = 1; 106 break; 107 case 'l': 108 cmp = lcmp; 109 break; 110 case 'r': 111 rflg = -1; 112 break; 113 case 't': 114 cmp = tcmp; 115 break; 116 case 'u': 117 cmp = ucmp; 118 break; 119 default: 120 usage(); 121 } 122 argc -= optind; 123 argv += optind; 124 125 if (argc != 0) 126 usage(); 127 128 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) 129 err(1, "%s", _PATH_RWHODIR); 130 131 maxloadav = -1; 132 for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) { 133 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) 134 continue; 135 if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) { 136 warn("%s", dp->d_name); 137 continue; 138 } 139 cc = read(fd, buf, sizeof(struct whod)); 140 (void)close(fd); 141 142 if (cc < WHDRSIZE) 143 continue; 144 if (nhosts == hspace) { 145 if ((hs = 146 realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL) 147 err(1, "realloc"); 148 hsp = hs + nhosts; 149 } 150 151 if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL) 152 err(1, "malloc"); 153 memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE); 154 155 for (wd = (struct whod *)buf, i = 0; i < 2; ++i) 156 if (wd->wd_loadav[i] > maxloadav) 157 maxloadav = wd->wd_loadav[i]; 158 159 for (hsp->hs_nusers = 0, 160 we = (struct whoent *)(buf + cc); --we >= wd->wd_we;) 161 if (aflg || we->we_idle < 3600) 162 ++hsp->hs_nusers; 163 ++hsp; 164 ++nhosts; 165 } 166 if (nhosts == 0) 167 errx(0, "no hosts in %s.", _PATH_RWHODIR); 168 169 (void)time(&now); 170 qsort(hs, nhosts, sizeof (hs[0]), cmp); 171 for (i = 0; i < nhosts; i++) { 172 hsp = &hs[i]; 173 if (ISDOWN(hsp)) { 174 (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname, 175 interval(now - hsp->hs_wd->wd_recvtime, "down")); 176 continue; 177 } 178 (void)printf( 179 "%-12.12s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n", 180 hsp->hs_wd->wd_hostname, 181 interval((time_t)hsp->hs_wd->wd_sendtime - 182 (time_t)hsp->hs_wd->wd_boottime, " up"), 183 hsp->hs_nusers, 184 hsp->hs_nusers == 1 ? ", " : "s,", 185 maxloadav >= 1000 ? 5 : 4, 186 hsp->hs_wd->wd_loadav[0] / 100.0, 187 maxloadav >= 1000 ? 5 : 4, 188 hsp->hs_wd->wd_loadav[1] / 100.0, 189 maxloadav >= 1000 ? 5 : 4, 190 hsp->hs_wd->wd_loadav[2] / 100.0); 191 } 192 exit(0); 193 } 194 195 char * 196 interval(tval, updown) 197 time_t tval; 198 char *updown; 199 { 200 static char resbuf[32]; 201 int days, hours, minutes; 202 203 if (tval < 0) { 204 (void)snprintf(resbuf, sizeof(resbuf), " %s ??:??", updown); 205 return (resbuf); 206 } 207 /* round to minutes. */ 208 minutes = (tval + (SECSPERMIN - 1)) / SECSPERMIN; 209 hours = minutes / MINSPERHOUR; 210 minutes %= MINSPERHOUR; 211 days = hours / HOURSPERDAY; 212 hours %= HOURSPERDAY; 213 if (days) 214 (void)snprintf(resbuf, sizeof(resbuf), 215 "%s%4d+%02d:%02d", updown, days, hours, minutes); 216 else 217 (void)snprintf(resbuf, sizeof(resbuf), 218 "%s %2d:%02d", updown, hours, minutes); 219 return (resbuf); 220 } 221 222 #define HS(a) ((struct hs *)(a)) 223 224 /* Alphabetical comparison. */ 225 int 226 hscmp(a1, a2) 227 const void *a1, *a2; 228 { 229 return (rflg * 230 strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname)); 231 } 232 233 /* Load average comparison. */ 234 int 235 lcmp(a1, a2) 236 const void *a1, *a2; 237 { 238 if (ISDOWN(HS(a1))) { 239 if (ISDOWN(HS(a2))) 240 return (tcmp(a1, a2)); 241 else 242 return (rflg); 243 } else if (ISDOWN(HS(a2))) { 244 return (-rflg); 245 } else 246 return (rflg * 247 (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0])); 248 } 249 250 /* Number of users comparison. */ 251 int 252 ucmp(a1, a2) 253 const void *a1, *a2; 254 { 255 if (ISDOWN(HS(a1))) { 256 if (ISDOWN(HS(a2))) 257 return (tcmp(a1, a2)); 258 else 259 return (rflg); 260 } else if (ISDOWN(HS(a2))) { 261 return (-rflg); 262 } else 263 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers)); 264 } 265 266 /* Uptime comparison. */ 267 int 268 tcmp(a1, a2) 269 const void *a1, *a2; 270 { 271 return (rflg * ( 272 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now 273 : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime) 274 - 275 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now 276 : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime) 277 )); 278 } 279 280 void 281 usage() 282 { 283 (void)fprintf(stderr, "usage: ruptime [-alrut]\n"); 284 exit(1); 285 } 286
Indexes created Mon Oct 27 20:09:55 GMT 2025