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. 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 31 static 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 37 static const char sccsid[] = "@(#)ruptime.c 8.2 (Berkeley) 4/5/94"; 38 #endif /* not lint */ 39 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 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 57 static 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 65 static size_t nhosts; 66 static time_t now; 67 static int rflg = 1; 68 static DIR *dirp; 69 70 static int hscmp(const void *, const void *); 71 static char *interval(time_t, const char *); 72 static int iwidth(int); 73 static int lcmp(const void *, const void *); 74 static void ruptime(const char *, int, int (*)(const void *, const void *)); 75 static int tcmp(const void *, const void *); 76 static int ucmp(const void *, const void *); 77 static void usage(void); 78 79 int 80 main(int argc, char *argv[]) 81 { 82 int (*cmp)(const void *, const void *); 83 int aflg, ch; 84 85 aflg = 0; 86 cmp = hscmp; 87 while ((ch = getopt(argc, argv, "alrut")) != -1) 88 switch (ch) { 89 case 'a': 90 aflg = 1; 91 break; 92 case 'l': 93 cmp = lcmp; 94 break; 95 case 'r': 96 rflg = -1; 97 break; 98 case 't': 99 cmp = tcmp; 100 break; 101 case 'u': 102 cmp = ucmp; 103 break; 104 default: 105 usage(); 106 } 107 argc -= optind; 108 argv += optind; 109 110 if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) 111 err(1, "%s", _PATH_RWHODIR); 112 113 ruptime(*argv, aflg, cmp); 114 while (*argv++ != NULL) { 115 if (*argv == NULL) 116 break; 117 ruptime(*argv, aflg, cmp); 118 } 119 exit(0); 120 } 121 122 static char * 123 interval(time_t tval, const char *updown) 124 { 125 static char resbuf[32]; 126 int days, hours, minutes; 127 128 if (tval < 0) { 129 (void)snprintf(resbuf, sizeof(resbuf), "%s ??:??", updown); 130 return (resbuf); 131 } 132 /* Round to minutes. */ 133 minutes = (tval + (60 - 1)) / 60; 134 hours = minutes / 60; 135 minutes %= 60; 136 days = hours / 24; 137 hours %= 24; 138 if (days) 139 (void)snprintf(resbuf, sizeof(resbuf), 140 "%s %4d+%02d:%02d", updown, days, hours, minutes); 141 else 142 (void)snprintf(resbuf, sizeof(resbuf), 143 "%s %2d:%02d", updown, hours, minutes); 144 return (resbuf); 145 } 146 147 /* Width to print a small nonnegative integer. */ 148 static int 149 iwidth(int w) 150 { 151 if (w < 10) 152 return (1); 153 if (w < 100) 154 return (2); 155 if (w < 1000) 156 return (3); 157 if (w < 10000) 158 return (4); 159 return (5); 160 } 161 162 #define HS(a) ((const struct hs *)(a)) 163 164 /* Alphabetical comparison. */ 165 static int 166 hscmp(const void *a1, const void *a2) 167 { 168 return (rflg * 169 strcmp(HS(a1)->hs_wd.wd_hostname, HS(a2)->hs_wd.wd_hostname)); 170 } 171 172 /* Load average comparison. */ 173 static int 174 lcmp(const void *a1, const void *a2) 175 { 176 if (ISDOWN(HS(a1))) 177 if (ISDOWN(HS(a2))) 178 return (tcmp(a1, a2)); 179 else 180 return (rflg); 181 else if (ISDOWN(HS(a2))) 182 return (-rflg); 183 else 184 return (rflg * 185 (HS(a2)->hs_wd.wd_loadav[0] - HS(a1)->hs_wd.wd_loadav[0])); 186 } 187 188 static void 189 ruptime(const char *host, int aflg, int (*cmp)(const void *, const void *)) 190 { 191 struct hs *hsp; 192 struct whod *wd; 193 struct whoent *we; 194 struct dirent *dp; 195 int fd, hostnamewidth, i, loadavwidth[3], userswidth, w; 196 size_t hspace; 197 ssize_t cc; 198 199 rewinddir(dirp); 200 hsp = NULL; 201 hostnamewidth = 0; 202 loadavwidth[0] = 4; 203 loadavwidth[1] = 4; 204 loadavwidth[2] = 4; 205 userswidth = 1; 206 (void)time(&now); 207 for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) { 208 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5) != 0) 209 continue; 210 if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) { 211 warn("%s", dp->d_name); 212 continue; 213 } 214 215 if (nhosts == hspace) { 216 if ((hs = 217 realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL) 218 err(1, NULL); 219 hsp = hs + nhosts; 220 } 221 222 wd = &hsp->hs_wd; 223 cc = read(fd, wd, sizeof(*wd)); 224 (void)close(fd); 225 if (cc < (ssize_t)WHDRSIZE) 226 continue; 227 228 if (host != NULL && strcasecmp(wd->wd_hostname, host) != 0) 229 continue; 230 if (LEFTEARTH(wd->wd_recvtime)) 231 continue; 232 233 if (hostnamewidth < (int)strlen(wd->wd_hostname)) 234 hostnamewidth = (int)strlen(wd->wd_hostname); 235 for (i = 0; i < 3; i++) { 236 w = iwidth(wd->wd_loadav[i] / 100) + 3; 237 if (loadavwidth[i] < w) 238 loadavwidth[i] = w; 239 } 240 241 for (hsp->hs_nusers = 0, we = &wd->wd_we[0]; 242 (char *)(we + 1) <= (char *)wd + cc; we++) 243 if (aflg || we->we_idle < 3600) 244 ++hsp->hs_nusers; 245 if (userswidth < iwidth(hsp->hs_nusers)) 246 userswidth = iwidth(hsp->hs_nusers); 247 ++hsp; 248 ++nhosts; 249 } 250 if (nhosts == 0) { 251 if (host == NULL) 252 errx(1, "no hosts in %s", _PATH_RWHODIR); 253 else 254 warnx("host %s not in %s", host, _PATH_RWHODIR); 255 } 256 257 qsort(hs, nhosts, sizeof(hs[0]), cmp); 258 w = userswidth + loadavwidth[0] + loadavwidth[1] + loadavwidth[2]; 259 if (hostnamewidth + w > 41) 260 hostnamewidth = 41 - w; /* limit to 79 cols */ 261 for (i = 0; i < (int)nhosts; i++) { 262 hsp = &hs[i]; 263 wd = &hsp->hs_wd; 264 if (ISDOWN(hsp)) { 265 (void)printf("%-*.*s%s\n", 266 hostnamewidth, hostnamewidth, wd->wd_hostname, 267 interval(now - hsp->hs_wd.wd_recvtime, "down")); 268 continue; 269 } 270 (void)printf( 271 "%-*.*s %s, %*d user%s load %*.2f, %*.2f, %*.2f\n", 272 hostnamewidth, hostnamewidth, wd->wd_hostname, 273 interval((time_t)wd->wd_sendtime - 274 (time_t)wd->wd_boottime, " up"), 275 userswidth, hsp->hs_nusers, 276 hsp->hs_nusers == 1 ? ", " : "s,", 277 loadavwidth[0], wd->wd_loadav[0] / 100.0, 278 loadavwidth[1], wd->wd_loadav[1] / 100.0, 279 loadavwidth[2], wd->wd_loadav[2] / 100.0); 280 } 281 free(hs); 282 hs = NULL; 283 } 284 285 /* Number of users comparison. */ 286 static int 287 ucmp(const void *a1, const void *a2) 288 { 289 if (ISDOWN(HS(a1))) 290 if (ISDOWN(HS(a2))) 291 return (tcmp(a1, a2)); 292 else 293 return (rflg); 294 else if (ISDOWN(HS(a2))) 295 return (-rflg); 296 else 297 return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers)); 298 } 299 300 /* Uptime comparison. */ 301 static int 302 tcmp(const void *a1, const void *a2) 303 { 304 return (rflg * ( 305 (ISDOWN(HS(a2)) ? HS(a2)->hs_wd.wd_recvtime - now 306 : HS(a2)->hs_wd.wd_sendtime - HS(a2)->hs_wd.wd_boottime) 307 - 308 (ISDOWN(HS(a1)) ? HS(a1)->hs_wd.wd_recvtime - now 309 : HS(a1)->hs_wd.wd_sendtime - HS(a1)->hs_wd.wd_boottime) 310 )); 311 } 312 313 static void 314 usage(void) 315 { 316 (void)fprintf(stderr, "usage: ruptime [-alrtu] [host ...]\n"); 317 exit(1); 318 } 319