ruptime.c revision 1.14
1 /* $NetBSD: ruptime.c,v 1.14 2009/04/13 07:10:25 lukem 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 1.14 2009/04/13 07:10:25 lukem 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 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 size_t nhosts; 68 time_t now; 69 int rflg = 1; 70 71 int hscmp(const void *, const void *); 72 char *interval(time_t, const char *); 73 int lcmp(const void *, const void *); 74 int main(int, char **); 75 void morehosts(void); 76 int tcmp(const void *, const void *); 77 int ucmp(const void *, const void *); 78 void usage(void); 79 80 int 81 main(int argc, char **argv) 82 { 83 struct dirent *dp; 84 struct hs *hsp; 85 struct whod *wd; 86 struct whoent *we; 87 DIR *dirp; 88 size_t hspace, i; 89 int aflg, cc, ch, fd, maxloadav; 90 char buf[sizeof(struct whod)]; 91 int (*cmp)(const void *, const void *); 92 93 hsp = NULL; 94 aflg = 0; 95 cmp = hscmp; 96 while ((ch = getopt(argc, argv, "alrtu")) != -1) 97 switch (ch) { 98 case 'a': 99 aflg = 1; 100 break; 101 case 'l': 102 cmp = lcmp; 103 break; 104 case 'r': 105 rflg = -1; 106 break; 107 case 't': 108 cmp = tcmp; 109 break; 110 case 'u': 111 cmp = ucmp; 112 break; 113 default: 114 usage(); 115 } 116 argc -= optind; 117 argv += optind; 118 119 if (argc != 0) 120 usage(); 121 122 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) 123 err(1, "%s", _PATH_RWHODIR); 124 125 maxloadav = -1; 126 for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) { 127 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5)) 128 continue; 129 if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) { 130 warn("%s", dp->d_name); 131 continue; 132 } 133 cc = read(fd, buf, sizeof(struct whod)); 134 (void)close(fd); 135 136 if (cc < (int)WHDRSIZE) 137 continue; 138 if (nhosts == hspace) { 139 if ((hs = 140 realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL) 141 err(1, "realloc"); 142 hsp = hs + nhosts; 143 } 144 145 if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL) 146 err(1, "malloc"); 147 memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE); 148 149 for (wd = (struct whod *)buf, i = 0; i < 2; ++i) 150 if (wd->wd_loadav[i] > maxloadav) 151 maxloadav = wd->wd_loadav[i]; 152 153 for (hsp->hs_nusers = 0, 154 we = (struct whoent *)(buf + cc); --we >= wd->wd_we;) 155 if (aflg || we->we_idle < 3600) 156 ++hsp->hs_nusers; 157 ++hsp; 158 ++nhosts; 159 } 160 if (nhosts == 0) 161 errx(0, "no hosts in %s", _PATH_RWHODIR); 162 163 (void)time(&now); 164 qsort(hs, nhosts, sizeof (hs[0]), cmp); 165 for (i = 0; i < nhosts; i++) { 166 hsp = &hs[i]; 167 if (ISDOWN(hsp)) { 168 (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname, 169 interval(now - hsp->hs_wd->wd_recvtime, "down")); 170 continue; 171 } 172 (void)printf( 173 "%-12.12s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n", 174 hsp->hs_wd->wd_hostname, 175 interval((time_t)hsp->hs_wd->wd_sendtime - 176 (time_t)hsp->hs_wd->wd_boottime, " up"), 177 hsp->hs_nusers, 178 hsp->hs_nusers == 1 ? ", " : "s,", 179 maxloadav >= 1000 ? 5 : 4, 180 hsp->hs_wd->wd_loadav[0] / 100.0, 181 maxloadav >= 1000 ? 5 : 4, 182 hsp->hs_wd->wd_loadav[1] / 100.0, 183 maxloadav >= 1000 ? 5 : 4, 184 hsp->hs_wd->wd_loadav[2] / 100.0); 185 } 186 exit(0); 187 } 188 189 char * 190 interval(time_t tval, const char *updown) 191 { 192 static char resbuf[32]; 193 int days, hours, minutes; 194 195 if (tval < 0) { 196 (void)snprintf(resbuf, sizeof(resbuf), " %s ??:??", updown); 197 return (resbuf); 198 } 199 /* round to minutes. */ 200 minutes = (tval + (SECSPERMIN - 1)) / SECSPERMIN; 201 hours = minutes / MINSPERHOUR; 202 minutes %= MINSPERHOUR; 203 days = hours / HOURSPERDAY; 204 hours %= HOURSPERDAY; 205 if (days) 206 (void)snprintf(resbuf, sizeof(resbuf), 207 "%s%4d+%02d:%02d", updown, days, hours, minutes); 208 else 209 (void)snprintf(resbuf, sizeof(resbuf), 210 "%s %2d:%02d", updown, hours, minutes); 211 return (resbuf); 212 } 213 214 #define HS(a) ((const struct hs *)(a)) 215 216 /* Alphabetical comparison. */ 217 int 218 hscmp(a1, a2) 219 const void *a1, *a2; 220 { 221 return (rflg * 222 strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname)); 223 } 224 225 /* Load average comparison. */ 226 int 227 lcmp(const void *a1, const void *a2) 228 { 229 if (ISDOWN(HS(a1))) { 230 if (ISDOWN(HS(a2))) 231 return (tcmp(a1, a2)); 232 else 233 return (rflg); 234 } else if (ISDOWN(HS(a2))) { 235 return (-rflg); 236 } else 237 return (rflg * 238 (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0])); 239 } 240 241 /* Number of users comparison. */ 242 int 243 ucmp(const void *a1, const void *a2) 244 { 245 if (ISDOWN(HS(a1))) { 246 if (ISDOWN(HS(a2))) 247 return (tcmp(a1, a2)); 248 else 249 return (rflg); 250 } else if (ISDOWN(HS(a2))) { 251 return (-rflg); 252 } else 253 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers)); 254 } 255 256 /* Uptime comparison. */ 257 int 258 tcmp(const void *a1, const void *a2) 259 { 260 return (rflg * ( 261 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now 262 : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime) 263 - 264 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now 265 : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime) 266 )); 267 } 268 269 void 270 usage(void) 271 { 272 (void)fprintf(stderr, "usage: ruptime [-alrtu]\n"); 273 exit(1); 274 } 275
Indexes created Mon Oct 27 08:10:08 GMT 2025