ruptime.c revision 1.5
1 /* $NetBSD: ruptime.c,v 1.5 1997/01/09 15:27:01 tls 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 #ifndef lint 37 static char copyright[] = 38 "@(#) 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 static char rcsid[] = "$NetBSD: ruptime.c,v 1.5 1997/01/09 15:27:01 tls 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 void morehosts __P((void)); 79 int tcmp __P((const void *, const void *)); 80 int ucmp __P((const void *, const void *)); 81 void usage __P((void)); 82 83 int 84 main(argc, argv) 85 int argc; 86 char **argv; 87 { 88 extern int optind; 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 aflg = 0; 100 cmp = hscmp; 101 while ((ch = getopt(argc, argv, "alrut")) != EOF) 102 switch (ch) { 103 case 'a': 104 aflg = 1; 105 break; 106 case 'l': 107 cmp = lcmp; 108 break; 109 case 'r': 110 rflg = -1; 111 break; 112 case 't': 113 cmp = tcmp; 114 break; 115 case 'u': 116 cmp = ucmp; 117 break; 118 default: 119 usage(); 120 } 121 argc -= optind; 122 argv += optind; 123 124 if (argc != 0) 125 usage(); 126 127 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) 128 err(1, "%s", _PATH_RWHODIR); 129 130 maxloadav = -1; 131 for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) { 132 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) 133 continue; 134 if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) { 135 warn("%s", dp->d_name); 136 continue; 137 } 138 cc = read(fd, buf, sizeof(struct whod)); 139 (void)close(fd); 140 141 if (cc < WHDRSIZE) 142 continue; 143 if (nhosts == hspace) { 144 if ((hs = 145 realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL) 146 err(1, NULL); 147 hsp = hs + nhosts; 148 } 149 150 if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL) 151 err(1, NULL); 152 memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE); 153 154 for (wd = (struct whod *)buf, i = 0; i < 2; ++i) 155 if (wd->wd_loadav[i] > maxloadav) 156 maxloadav = wd->wd_loadav[i]; 157 158 for (hsp->hs_nusers = 0, 159 we = (struct whoent *)(buf + cc); --we >= wd->wd_we;) 160 if (aflg || we->we_idle < 3600) 161 ++hsp->hs_nusers; 162 ++hsp; 163 ++nhosts; 164 } 165 if (nhosts == 0) 166 errx(0, "no hosts in %s.", _PATH_RWHODIR); 167 168 (void)time(&now); 169 qsort(hs, nhosts, sizeof (hs[0]), cmp); 170 for (i = 0; i < nhosts; i++) { 171 hsp = &hs[i]; 172 if (ISDOWN(hsp)) { 173 (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname, 174 interval(now - hsp->hs_wd->wd_recvtime, "down")); 175 continue; 176 } 177 (void)printf( 178 "%-12.12s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n", 179 hsp->hs_wd->wd_hostname, 180 interval((time_t)hsp->hs_wd->wd_sendtime - 181 (time_t)hsp->hs_wd->wd_boottime, " up"), 182 hsp->hs_nusers, 183 hsp->hs_nusers == 1 ? ", " : "s,", 184 maxloadav >= 1000 ? 5 : 4, 185 hsp->hs_wd->wd_loadav[0] / 100.0, 186 maxloadav >= 1000 ? 5 : 4, 187 hsp->hs_wd->wd_loadav[1] / 100.0, 188 maxloadav >= 1000 ? 5 : 4, 189 hsp->hs_wd->wd_loadav[2] / 100.0); 190 } 191 exit(0); 192 } 193 194 char * 195 interval(tval, updown) 196 time_t tval; 197 char *updown; 198 { 199 static char resbuf[32]; 200 int days, hours, minutes; 201 202 if (tval < 0 || tval > DAYSPERNYEAR * SECSPERDAY) { 203 (void)snprintf(resbuf, sizeof(resbuf), " %s ??:??", updown); 204 return (resbuf); 205 } 206 /* round to minutes. */ 207 minutes = (tval + (SECSPERMIN - 1)) / SECSPERMIN; 208 hours = minutes / MINSPERHOUR; 209 minutes %= MINSPERHOUR; 210 days = hours / HOURSPERDAY; 211 hours %= HOURSPERDAY; 212 if (days) 213 (void)snprintf(resbuf, sizeof(resbuf), 214 "%s %2d+%02d:%02d", updown, days, hours, minutes); 215 else 216 (void)snprintf(resbuf, sizeof(resbuf), 217 "%s %2d:%02d", updown, hours, minutes); 218 return (resbuf); 219 } 220 221 #define HS(a) ((struct hs *)(a)) 222 223 /* Alphabetical comparison. */ 224 int 225 hscmp(a1, a2) 226 const void *a1, *a2; 227 { 228 return (rflg * 229 strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname)); 230 } 231 232 /* Load average comparison. */ 233 int 234 lcmp(a1, a2) 235 const void *a1, *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 * 246 (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0])); 247 } 248 249 /* Number of users comparison. */ 250 int 251 ucmp(a1, a2) 252 const void *a1, *a2; 253 { 254 if (ISDOWN(HS(a1))) 255 if (ISDOWN(HS(a2))) 256 return (tcmp(a1, a2)); 257 else 258 return (rflg); 259 else if (ISDOWN(HS(a2))) 260 return (-rflg); 261 else 262 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers)); 263 } 264 265 /* Uptime comparison. */ 266 int 267 tcmp(a1, a2) 268 const void *a1, *a2; 269 { 270 return (rflg * ( 271 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now 272 : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime) 273 - 274 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now 275 : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime) 276 )); 277 } 278 279 void 280 usage() 281 { 282 (void)fprintf(stderr, "usage: ruptime [-alrut]\n"); 283 exit(1); 284 } 285
Indexes created Mon Oct 27 02:09:54 GMT 2025