ruptime.c revision 302408
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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef lint 31static const char copyright[] = 32"@(#) Copyright (c) 1983, 1993, 1994\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34#endif /* not lint */ 35 36#ifndef lint 37static const char sccsid[] = "@(#)ruptime.c 8.2 (Berkeley) 4/5/94"; 38#endif /* not lint */ 39 40#include <sys/cdefs.h> 41__FBSDID("$FreeBSD: stable/11/usr.bin/ruptime/ruptime.c 227178 2011-11-06 08:16:41Z ed $"); 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 <unistd.h> 56 57static struct hs { 58 struct whod hs_wd; 59 int hs_nusers; 60} *hs; 61#define LEFTEARTH(h) (now - (h) > 4*24*60*60) 62#define ISDOWN(h) (now - (h)->hs_wd.wd_recvtime > 11 * 60) 63#define WHDRSIZE __offsetof(struct whod, wd_we) 64 65static size_t nhosts; 66static time_t now; 67static int rflg = 1; 68static DIR *dirp; 69 70static int hscmp(const void *, const void *); 71static char *interval(time_t, const char *); 72static int lcmp(const void *, const void *); 73static void ruptime(const char *, int, int (*)(const void *, const void *)); 74static int tcmp(const void *, const void *); 75static int ucmp(const void *, const void *); 76static void usage(void); 77 78int 79main(int argc, char *argv[]) 80{ 81 int (*cmp)(const void *, const void *); 82 int aflg, ch; 83 84 aflg = 0; 85 cmp = hscmp; 86 while ((ch = getopt(argc, argv, "alrut")) != -1) 87 switch (ch) { 88 case 'a': 89 aflg = 1; 90 break; 91 case 'l': 92 cmp = lcmp; 93 break; 94 case 'r': 95 rflg = -1; 96 break; 97 case 't': 98 cmp = tcmp; 99 break; 100 case 'u': 101 cmp = ucmp; 102 break; 103 default: 104 usage(); 105 } 106 argc -= optind; 107 argv += optind; 108 109 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) 110 err(1, "%s", _PATH_RWHODIR); 111 112 ruptime(*argv, aflg, cmp); 113 while (*argv++ != NULL) { 114 if (*argv == NULL) 115 break; 116 ruptime(*argv, aflg, cmp); 117 } 118 exit(0); 119} 120 121static char * 122interval(time_t tval, const char *updown) 123{ 124 static char resbuf[32]; 125 int days, hours, minutes; 126 127 if (tval < 0) { 128 (void)snprintf(resbuf, sizeof(resbuf), "%s ??:??", updown); 129 return (resbuf); 130 } 131 /* Round to minutes. */ 132 minutes = (tval + (60 - 1)) / 60; 133 hours = minutes / 60; 134 minutes %= 60; 135 days = hours / 24; 136 hours %= 24; 137 if (days) 138 (void)snprintf(resbuf, sizeof(resbuf), 139 "%s %4d+%02d:%02d", updown, days, hours, minutes); 140 else 141 (void)snprintf(resbuf, sizeof(resbuf), 142 "%s %2d:%02d", updown, hours, minutes); 143 return (resbuf); 144} 145 146#define HS(a) ((const struct hs *)(a)) 147 148/* Alphabetical comparison. */ 149static int 150hscmp(const void *a1, const void *a2) 151{ 152 return (rflg * 153 strcmp(HS(a1)->hs_wd.wd_hostname, HS(a2)->hs_wd.wd_hostname)); 154} 155 156/* Load average comparison. */ 157static int 158lcmp(const void *a1, const void *a2) 159{ 160 if (ISDOWN(HS(a1))) 161 if (ISDOWN(HS(a2))) 162 return (tcmp(a1, a2)); 163 else 164 return (rflg); 165 else if (ISDOWN(HS(a2))) 166 return (-rflg); 167 else 168 return (rflg * 169 (HS(a2)->hs_wd.wd_loadav[0] - HS(a1)->hs_wd.wd_loadav[0])); 170} 171 172static void 173ruptime(const char *host, int aflg, int (*cmp)(const void *, const void *)) 174{ 175 struct hs *hsp; 176 struct whod *wd; 177 struct whoent *we; 178 struct dirent *dp; 179 const char *hostname; 180 int fd, i, maxloadav; 181 size_t hspace; 182 ssize_t cc; 183 184 rewinddir(dirp); 185 hsp = NULL; 186 maxloadav = -1; 187 (void)time(&now); 188 for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) { 189 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5) != 0) 190 continue; 191 if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) { 192 warn("%s", dp->d_name); 193 continue; 194 } 195 196 if (nhosts == hspace) { 197 if ((hs = 198 realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL) 199 err(1, NULL); 200 hsp = hs + nhosts; 201 } 202 203 wd = &hsp->hs_wd; 204 cc = read(fd, wd, sizeof(*wd)); 205 (void)close(fd); 206 if (cc < (ssize_t)WHDRSIZE) 207 continue; 208 209 if (host != NULL) { 210 hostname = wd->wd_hostname; 211 if (strcasecmp(hostname, host) != 0) 212 continue; 213 } 214 if (LEFTEARTH(wd->wd_recvtime)) 215 continue; 216 217 for (i = 0; i < 2; i++) 218 if (wd->wd_loadav[i] > maxloadav) 219 maxloadav = wd->wd_loadav[i]; 220 221 for (hsp->hs_nusers = 0, we = &wd->wd_we[0]; 222 (char *)(we + 1) <= (char *)wd + cc; we++) 223 if (aflg || we->we_idle < 3600) 224 ++hsp->hs_nusers; 225 ++hsp; 226 ++nhosts; 227 } 228 if (nhosts == 0) { 229 if (host == NULL) 230 errx(1, "no hosts in %s", _PATH_RWHODIR); 231 else 232 warnx("host %s not in %s", host, _PATH_RWHODIR); 233 } 234 235 qsort(hs, nhosts, sizeof(hs[0]), cmp); 236 for (i = 0; i < (int)nhosts; i++) { 237 hsp = &hs[i]; 238 wd = &hsp->hs_wd; 239 if (ISDOWN(hsp)) { 240 (void)printf("%-25.25s%s\n", wd->wd_hostname, 241 interval(now - hsp->hs_wd.wd_recvtime, "down")); 242 continue; 243 } 244 (void)printf( 245 "%-25.25s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n", 246 wd->wd_hostname, 247 interval((time_t)wd->wd_sendtime - 248 (time_t)wd->wd_boottime, " up"), 249 hsp->hs_nusers, 250 hsp->hs_nusers == 1 ? ", " : "s,", 251 maxloadav >= 1000 ? 5 : 4, 252 wd->wd_loadav[0] / 100.0, 253 maxloadav >= 1000 ? 5 : 4, 254 wd->wd_loadav[1] / 100.0, 255 maxloadav >= 1000 ? 5 : 4, 256 wd->wd_loadav[2] / 100.0); 257 } 258 free(hs); 259 hs = NULL; 260} 261 262/* Number of users comparison. */ 263static int 264ucmp(const void *a1, const void *a2) 265{ 266 if (ISDOWN(HS(a1))) 267 if (ISDOWN(HS(a2))) 268 return (tcmp(a1, a2)); 269 else 270 return (rflg); 271 else if (ISDOWN(HS(a2))) 272 return (-rflg); 273 else 274 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers)); 275} 276 277/* Uptime comparison. */ 278static int 279tcmp(const void *a1, const void *a2) 280{ 281 return (rflg * ( 282 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd.wd_recvtime - now 283 : HS(a2)->hs_wd.wd_sendtime - HS(a2)->hs_wd.wd_boottime) 284 - 285 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd.wd_recvtime - now 286 : HS(a1)->hs_wd.wd_sendtime - HS(a1)->hs_wd.wd_boottime) 287 )); 288} 289 290static void 291usage(void) 292{ 293 (void)fprintf(stderr, "usage: ruptime [-alrtu] [host ...]\n"); 294 exit(1); 295} 296