ruptime.c revision 200462
1/* 2 * Copyright (c) 1983, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35static const char copyright[] = 36"@(#) Copyright (c) 1983, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#ifndef lint 41static const char sccsid[] = "@(#)ruptime.c 8.2 (Berkeley) 4/5/94"; 42#endif /* not lint */ 43 44#include <sys/cdefs.h> 45__FBSDID("$FreeBSD: head/usr.bin/ruptime/ruptime.c 200462 2009-12-13 03:14:06Z delphij $"); 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 <unistd.h> 60 61struct hs { 62 struct whod *hs_wd; 63 int hs_nusers; 64} *hs; 65struct whod awhod; 66#define LEFTEARTH(h) (now - (h) > 4*24*60*60) 67#define ISDOWN(h) (now - (h)->hs_wd->wd_recvtime > 11 * 60) 68#define WHDRSIZE (sizeof (awhod) - sizeof (awhod.wd_we)) 69 70size_t nhosts; 71time_t now; 72int rflg = 1; 73DIR *dirp; 74 75int hscmp(const void *, const void *); 76char *interval(time_t, const char *); 77int lcmp(const void *, const void *); 78void morehosts(void); 79void ruptime(const char *, int, int (*)(const void *, const void *)); 80int tcmp(const void *, const void *); 81int ucmp(const void *, const void *); 82void usage(void); 83 84int 85main(int argc, char *argv[]) 86{ 87 int (*cmp)(const void *, const void *); 88 int aflg, ch; 89 90 aflg = 0; 91 cmp = hscmp; 92 while ((ch = getopt(argc, argv, "alrut")) != -1) 93 switch (ch) { 94 case 'a': 95 aflg = 1; 96 break; 97 case 'l': 98 cmp = lcmp; 99 break; 100 case 'r': 101 rflg = -1; 102 break; 103 case 't': 104 cmp = tcmp; 105 break; 106 case 'u': 107 cmp = ucmp; 108 break; 109 default: 110 usage(); 111 } 112 argc -= optind; 113 argv += optind; 114 115 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) 116 err(1, "%s", _PATH_RWHODIR); 117 118 ruptime(*argv, aflg, cmp); 119 while (*argv++ != NULL) { 120 if (*argv == NULL) 121 break; 122 ruptime(*argv, aflg, cmp); 123 } 124 exit(0); 125} 126 127char * 128interval(time_t tval, const char *updown) 129{ 130 static char resbuf[32]; 131 int days, hours, minutes; 132 133 if (tval < 0) { 134 (void)snprintf(resbuf, sizeof(resbuf), " %s ??:??", updown); 135 return (resbuf); 136 } 137 /* round to minutes. */ 138 minutes = (tval + (60 - 1)) / 60; 139 hours = minutes / 60; 140 minutes %= 60; 141 days = hours / 24; 142 hours %= 24; 143 if (days) 144 (void)snprintf(resbuf, sizeof(resbuf), 145 "%s %3d+%02d:%02d", updown, days, hours, minutes); 146 else 147 (void)snprintf(resbuf, sizeof(resbuf), 148 "%s %2d:%02d", updown, hours, minutes); 149 return (resbuf); 150} 151 152#define HS(a) ((const struct hs *)(a)) 153 154/* Alphabetical comparison. */ 155int 156hscmp(const void *a1, const void *a2) 157{ 158 return (rflg * 159 strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname)); 160} 161 162/* Load average comparison. */ 163int 164lcmp(const void *a1, const void *a2) 165{ 166 if (ISDOWN(HS(a1))) 167 if (ISDOWN(HS(a2))) 168 return (tcmp(a1, a2)); 169 else 170 return (rflg); 171 else if (ISDOWN(HS(a2))) 172 return (-rflg); 173 else 174 return (rflg * 175 (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0])); 176} 177 178void 179ruptime(const char *host, int aflg, int (*cmp)(const void *, const void *)) 180{ 181 struct hs *hsp; 182 struct whod *wd; 183 struct whoent *we; 184 struct dirent *dp; 185 const char *hostname; 186 char buf[sizeof(struct whod)]; 187 int fd, i, maxloadav; 188 size_t hspace; 189 u_int cc; 190 191 rewinddir(dirp); 192 hsp = NULL; 193 maxloadav = -1; 194 (void)time(&now); 195 for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) { 196 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5) != 0) 197 continue; 198 if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) { 199 warn("%s", dp->d_name); 200 continue; 201 } 202 cc = read(fd, buf, sizeof(struct whod)); 203 (void)close(fd); 204 if (host != NULL) { 205 hostname = ((struct whod *)buf)->wd_hostname; 206 if (strcasecmp(hostname, host) != 0) 207 continue; 208 } 209 210 if (cc < WHDRSIZE) 211 continue; 212 if (LEFTEARTH(((struct whod *)buf)->wd_recvtime)) 213 continue; 214 if (nhosts == hspace) { 215 if ((hs = 216 realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL) 217 err(1, NULL); 218 hsp = hs + nhosts; 219 } 220 221 if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL) 222 err(1, NULL); 223 memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE); 224 225 for (wd = (struct whod *)buf, i = 0; i < 2; ++i) 226 if (wd->wd_loadav[i] > maxloadav) 227 maxloadav = wd->wd_loadav[i]; 228 229 for (hsp->hs_nusers = 0, 230 we = (struct whoent *)(buf + cc); --we >= wd->wd_we;) 231 if (aflg || we->we_idle < 3600) 232 ++hsp->hs_nusers; 233 ++hsp; 234 ++nhosts; 235 } 236 if (nhosts == 0) { 237 if (host == NULL) 238 errx(1, "no hosts in %s", _PATH_RWHODIR); 239 else 240 warnx("host %s not in %s", host, _PATH_RWHODIR); 241 } 242 243 qsort(hs, nhosts, sizeof(hs[0]), cmp); 244 for (i = 0; i < (int)nhosts; i++) { 245 hsp = &hs[i]; 246 if (ISDOWN(hsp)) { 247 (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname, 248 interval(now - hsp->hs_wd->wd_recvtime, "down")); 249 continue; 250 } 251 (void)printf( 252 "%-12.12s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n", 253 hsp->hs_wd->wd_hostname, 254 interval((time_t)hsp->hs_wd->wd_sendtime - 255 (time_t)hsp->hs_wd->wd_boottime, " up"), 256 hsp->hs_nusers, 257 hsp->hs_nusers == 1 ? ", " : "s,", 258 maxloadav >= 1000 ? 5 : 4, 259 hsp->hs_wd->wd_loadav[0] / 100.0, 260 maxloadav >= 1000 ? 5 : 4, 261 hsp->hs_wd->wd_loadav[1] / 100.0, 262 maxloadav >= 1000 ? 5 : 4, 263 hsp->hs_wd->wd_loadav[2] / 100.0); 264 free(hsp->hs_wd); 265 } 266 free(hs); 267 hs = NULL; 268} 269 270/* Number of users comparison. */ 271int 272ucmp(const void *a1, const void *a2) 273{ 274 if (ISDOWN(HS(a1))) 275 if (ISDOWN(HS(a2))) 276 return (tcmp(a1, a2)); 277 else 278 return (rflg); 279 else if (ISDOWN(HS(a2))) 280 return (-rflg); 281 else 282 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers)); 283} 284 285/* Uptime comparison. */ 286int 287tcmp(const void *a1, const void *a2) 288{ 289 return (rflg * ( 290 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now 291 : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime) 292 - 293 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now 294 : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime) 295 )); 296} 297 298void 299usage(void) 300{ 301 (void)fprintf(stderr, "usage: ruptime [-alrtu] [host ...]\n"); 302 exit(1); 303} 304