Commit | Line | Data |
---|---|---|
3b86b0f6 | 1 | /* |
a34f5dc0 KB |
2 | * Copyright (c) 1983, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
86f08f99 | 4 | * |
417f7a11 | 5 | * %sccs.include.redist.c% |
3b86b0f6 DF |
6 | */ |
7 | ||
8 | #ifndef lint | |
a34f5dc0 KB |
9 | static char copyright[] = |
10 | "@(#) Copyright (c) 1983, 1993\n\ | |
11 | The Regents of the University of California. All rights reserved.\n"; | |
86f08f99 | 12 | #endif /* not lint */ |
3b86b0f6 | 13 | |
52b4fb0c | 14 | #ifndef lint |
a34f5dc0 | 15 | static char sccsid[] = "@(#)rwhod.c 8.1 (Berkeley) %G%"; |
86f08f99 | 16 | #endif /* not lint */ |
52b4fb0c | 17 | |
b584098b | 18 | #include <sys/param.h> |
52b4fb0c | 19 | #include <sys/socket.h> |
52b4fb0c | 20 | #include <sys/stat.h> |
17ccb086 | 21 | #include <sys/signal.h> |
52b4fb0c | 22 | #include <sys/ioctl.h> |
d605e71a | 23 | #include <sys/sysctl.h> |
de3b21e8 | 24 | |
7af17b3e | 25 | #include <net/if.h> |
0892992b KS |
26 | #include <net/if_dl.h> |
27 | #include <net/route.h> | |
de3b21e8 | 28 | #include <netinet/in.h> |
55ae2764 | 29 | #include <protocols/rwhod.h> |
de3b21e8 | 30 | |
a0f59ac1 | 31 | #include <ctype.h> |
55ae2764 KB |
32 | #include <errno.h> |
33 | #include <fcntl.h> | |
a0f59ac1 | 34 | #include <netdb.h> |
55ae2764 | 35 | #include <paths.h> |
17ccb086 | 36 | #include <stdio.h> |
55ae2764 KB |
37 | #include <stdlib.h> |
38 | #include <string.h> | |
39 | #include <syslog.h> | |
0f756990 | 40 | #include <unistd.h> |
55ae2764 | 41 | #include <utmp.h> |
de3b21e8 | 42 | |
83361bb3 RC |
43 | /* |
44 | * Alarm interval. Don't forget to change the down time check in ruptime | |
45 | * if this is changed. | |
46 | */ | |
00cdc205 | 47 | #define AL_INTERVAL (3 * 60) |
83361bb3 | 48 | |
b584098b | 49 | char myname[MAXHOSTNAMELEN]; |
52b4fb0c | 50 | |
7af17b3e | 51 | /* |
55ae2764 KB |
52 | * We communicate with each neighbor in a list constructed at the time we're |
53 | * started up. Neighbors are currently directly connected via a hardware | |
54 | * interface. | |
7af17b3e SL |
55 | */ |
56 | struct neighbor { | |
57 | struct neighbor *n_next; | |
58 | char *n_name; /* interface name */ | |
0892992b | 59 | struct sockaddr *n_addr; /* who to send to */ |
7af17b3e SL |
60 | int n_addrlen; /* size of address */ |
61 | int n_flags; /* should forward?, interface flags */ | |
62 | }; | |
63 | ||
64 | struct neighbor *neighbors; | |
52b4fb0c | 65 | struct whod mywd; |
7af17b3e | 66 | struct servent *sp; |
cf498703 | 67 | int s, utmpf; |
52b4fb0c | 68 | |
5115d8df | 69 | #define WHDRSIZE (sizeof(mywd) - sizeof(mywd.wd_we)) |
fea387f0 | 70 | |
55ae2764 | 71 | int configure __P((int)); |
cf498703 | 72 | void getboottime __P((int)); |
55ae2764 KB |
73 | void onalrm __P((int)); |
74 | void quit __P((char *)); | |
75 | void rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); | |
76 | int verify __P((char *)); | |
77 | #ifdef DEBUG | |
78 | char *interval __P((int, char *)); | |
5115d8df CT |
79 | void Sendto __P((int, char *, int, int, char *, int)); |
80 | #define sendto Sendto | |
55ae2764 | 81 | #endif |
52b4fb0c | 82 | |
55ae2764 KB |
83 | int |
84 | main(argc, argv) | |
85 | int argc; | |
86 | char argv[]; | |
52b4fb0c BJ |
87 | { |
88 | struct sockaddr_in from; | |
0f2d5e68 | 89 | struct stat st; |
52b4fb0c | 90 | char path[64]; |
221be169 | 91 | int on = 1; |
55ae2764 | 92 | char *cp; |
5115d8df | 93 | struct sockaddr_in sin; |
52b4fb0c | 94 | |
00cdc205 RC |
95 | if (getuid()) { |
96 | fprintf(stderr, "rwhod: not super user\n"); | |
97 | exit(1); | |
98 | } | |
a0f59ac1 | 99 | sp = getservbyname("who", "udp"); |
55ae2764 | 100 | if (sp == NULL) { |
a0f59ac1 SL |
101 | fprintf(stderr, "rwhod: udp/who: unknown service\n"); |
102 | exit(1); | |
103 | } | |
52b4fb0c | 104 | #ifndef DEBUG |
afe907a4 | 105 | daemon(1, 0); |
52b4fb0c | 106 | #endif |
17ccb086 KB |
107 | if (chdir(_PATH_RWHODIR) < 0) { |
108 | (void)fprintf(stderr, "rwhod: %s: %s\n", | |
109 | _PATH_RWHODIR, strerror(errno)); | |
ac82a1ec KM |
110 | exit(1); |
111 | } | |
cf498703 | 112 | (void) signal(SIGHUP, getboottime); |
076ae92c | 113 | openlog("rwhod", LOG_PID, LOG_DAEMON); |
7af17b3e SL |
114 | /* |
115 | * Establish host name as returned by system. | |
116 | */ | |
5115d8df | 117 | if (gethostname(myname, sizeof(myname) - 1) < 0) { |
00cdc205 | 118 | syslog(LOG_ERR, "gethostname: %m"); |
52b4fb0c BJ |
119 | exit(1); |
120 | } | |
d2444544 JB |
121 | if ((cp = index(myname, '.')) != NULL) |
122 | *cp = '\0'; | |
5115d8df | 123 | strncpy(mywd.wd_hostname, myname, sizeof(myname) - 1); |
17ccb086 | 124 | utmpf = open(_PATH_UTMP, O_RDONLY|O_CREAT, 0644); |
52b4fb0c | 125 | if (utmpf < 0) { |
17ccb086 | 126 | syslog(LOG_ERR, "%s: %m", _PATH_UTMP); |
52b4fb0c BJ |
127 | exit(1); |
128 | } | |
cf498703 | 129 | getboottime(0); |
9bd66dcf | 130 | if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
00cdc205 | 131 | syslog(LOG_ERR, "socket: %m"); |
de3b21e8 SL |
132 | exit(1); |
133 | } | |
5115d8df | 134 | if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)) < 0) { |
b0e1e5f3 MK |
135 | syslog(LOG_ERR, "setsockopt SO_BROADCAST: %m"); |
136 | exit(1); | |
137 | } | |
5115d8df | 138 | memset(&sin, 0, sizeof(sin)); |
b584098b | 139 | sin.sin_family = AF_INET; |
7af17b3e | 140 | sin.sin_port = sp->s_port; |
5115d8df | 141 | if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) { |
00cdc205 | 142 | syslog(LOG_ERR, "bind: %m"); |
de3b21e8 | 143 | exit(1); |
52b4fb0c | 144 | } |
7af17b3e SL |
145 | if (!configure(s)) |
146 | exit(1); | |
8a53982e | 147 | signal(SIGALRM, onalrm); |
55ae2764 | 148 | onalrm(0); |
52b4fb0c BJ |
149 | for (;;) { |
150 | struct whod wd; | |
5115d8df | 151 | int cc, whod, len = sizeof(from); |
52b4fb0c | 152 | |
5115d8df | 153 | cc = recvfrom(s, (char *)&wd, sizeof(struct whod), 0, |
0df908a9 | 154 | (struct sockaddr *)&from, &len); |
52b4fb0c BJ |
155 | if (cc <= 0) { |
156 | if (cc < 0 && errno != EINTR) | |
00cdc205 | 157 | syslog(LOG_WARNING, "recv: %m"); |
52b4fb0c BJ |
158 | continue; |
159 | } | |
a0f59ac1 | 160 | if (from.sin_port != sp->s_port) { |
00cdc205 | 161 | syslog(LOG_WARNING, "%d: bad from port", |
a0f59ac1 | 162 | ntohs(from.sin_port)); |
52b4fb0c BJ |
163 | continue; |
164 | } | |
aaddf8a1 SL |
165 | if (wd.wd_vers != WHODVERSION) |
166 | continue; | |
7af17b3e SL |
167 | if (wd.wd_type != WHODTYPE_STATUS) |
168 | continue; | |
a0f59ac1 | 169 | if (!verify(wd.wd_hostname)) { |
00cdc205 | 170 | syslog(LOG_WARNING, "malformed host name from %x", |
a0f59ac1 | 171 | from.sin_addr); |
52b4fb0c BJ |
172 | continue; |
173 | } | |
ac82a1ec | 174 | (void) sprintf(path, "whod.%s", wd.wd_hostname); |
0f2d5e68 MK |
175 | /* |
176 | * Rather than truncating and growing the file each time, | |
177 | * use ftruncate if size is less than previous size. | |
178 | */ | |
179 | whod = open(path, O_WRONLY | O_CREAT, 0644); | |
52b4fb0c | 180 | if (whod < 0) { |
00cdc205 | 181 | syslog(LOG_WARNING, "%s: %m", path); |
52b4fb0c BJ |
182 | continue; |
183 | } | |
b584098b | 184 | #if ENDIAN != BIG_ENDIAN |
fea387f0 | 185 | { |
9bd66dcf | 186 | int i, n = (cc - WHDRSIZE)/sizeof(struct whoent); |
fea387f0 SL |
187 | struct whoent *we; |
188 | ||
189 | /* undo header byte swapping before writing to file */ | |
190 | wd.wd_sendtime = ntohl(wd.wd_sendtime); | |
191 | for (i = 0; i < 3; i++) | |
192 | wd.wd_loadav[i] = ntohl(wd.wd_loadav[i]); | |
193 | wd.wd_boottime = ntohl(wd.wd_boottime); | |
194 | we = wd.wd_we; | |
195 | for (i = 0; i < n; i++) { | |
196 | we->we_idle = ntohl(we->we_idle); | |
1cccbcb3 SL |
197 | we->we_utmp.out_time = |
198 | ntohl(we->we_utmp.out_time); | |
fea387f0 SL |
199 | we++; |
200 | } | |
201 | } | |
202 | #endif | |
0df908a9 | 203 | (void) time((time_t *)&wd.wd_recvtime); |
52b4fb0c | 204 | (void) write(whod, (char *)&wd, cc); |
0f2d5e68 MK |
205 | if (fstat(whod, &st) < 0 || st.st_size > cc) |
206 | ftruncate(whod, cc); | |
52b4fb0c BJ |
207 | (void) close(whod); |
208 | } | |
209 | } | |
210 | ||
a0f59ac1 SL |
211 | /* |
212 | * Check out host name for unprintables | |
213 | * and other funnies before allowing a file | |
214 | * to be created. Sorry, but blanks aren't allowed. | |
215 | */ | |
55ae2764 | 216 | int |
a0f59ac1 SL |
217 | verify(name) |
218 | register char *name; | |
219 | { | |
220 | register int size = 0; | |
221 | ||
222 | while (*name) { | |
77650176 | 223 | if (!isascii(*name) || !(isalnum(*name) || ispunct(*name))) |
a0f59ac1 SL |
224 | return (0); |
225 | name++, size++; | |
226 | } | |
227 | return (size > 0); | |
228 | } | |
229 | ||
52b4fb0c BJ |
230 | int utmptime; |
231 | int utmpent; | |
4c9b3acd JB |
232 | int utmpsize = 0; |
233 | struct utmp *utmp; | |
52b4fb0c BJ |
234 | int alarmcount; |
235 | ||
0df908a9 | 236 | void |
55ae2764 KB |
237 | onalrm(signo) |
238 | int signo; | |
52b4fb0c | 239 | { |
17ccb086 KB |
240 | register struct neighbor *np; |
241 | register struct whoent *we = mywd.wd_we, *wlast; | |
52b4fb0c BJ |
242 | register int i; |
243 | struct stat stb; | |
52b4fb0c | 244 | double avenrun[3]; |
55ae2764 KB |
245 | time_t now; |
246 | int cc; | |
52b4fb0c | 247 | |
55ae2764 | 248 | now = time(NULL); |
52b4fb0c | 249 | if (alarmcount % 10 == 0) |
cf498703 | 250 | getboottime(0); |
52b4fb0c BJ |
251 | alarmcount++; |
252 | (void) fstat(utmpf, &stb); | |
4c9b3acd | 253 | if ((stb.st_mtime != utmptime) || (stb.st_size > utmpsize)) { |
02d31241 | 254 | utmptime = stb.st_mtime; |
4c9b3acd JB |
255 | if (stb.st_size > utmpsize) { |
256 | utmpsize = stb.st_size + 10 * sizeof(struct utmp); | |
257 | if (utmp) | |
258 | utmp = (struct utmp *)realloc(utmp, utmpsize); | |
259 | else | |
260 | utmp = (struct utmp *)malloc(utmpsize); | |
261 | if (! utmp) { | |
262 | fprintf(stderr, "rwhod: malloc failed\n"); | |
263 | utmpsize = 0; | |
264 | goto done; | |
265 | } | |
266 | } | |
0f756990 | 267 | (void) lseek(utmpf, (off_t)0, L_SET); |
4c9b3acd | 268 | cc = read(utmpf, (char *)utmp, stb.st_size); |
52b4fb0c | 269 | if (cc < 0) { |
17ccb086 KB |
270 | fprintf(stderr, "rwhod: %s: %s\n", |
271 | _PATH_UTMP, strerror(errno)); | |
08d10f57 | 272 | goto done; |
52b4fb0c | 273 | } |
5115d8df CT |
274 | wlast = &mywd.wd_we[1024 / sizeof(struct whoent) - 1]; |
275 | utmpent = cc / sizeof(struct utmp); | |
52b4fb0c BJ |
276 | for (i = 0; i < utmpent; i++) |
277 | if (utmp[i].ut_name[0]) { | |
5115d8df CT |
278 | memcpy(we->we_utmp.out_line, utmp[i].ut_line, |
279 | sizeof(utmp[i].ut_line)); | |
280 | memcpy(we->we_utmp.out_name, utmp[i].ut_name, | |
281 | sizeof(utmp[i].ut_name)); | |
b1456c48 | 282 | we->we_utmp.out_time = htonl(utmp[i].ut_time); |
76886f32 SL |
283 | if (we >= wlast) |
284 | break; | |
52b4fb0c BJ |
285 | we++; |
286 | } | |
287 | utmpent = we - mywd.wd_we; | |
288 | } | |
221be169 KM |
289 | |
290 | /* | |
291 | * The test on utmpent looks silly---after all, if no one is | |
292 | * logged on, why worry about efficiency?---but is useful on | |
293 | * (e.g.) compute servers. | |
294 | */ | |
7abf8d65 KB |
295 | if (utmpent && chdir(_PATH_DEV)) { |
296 | syslog(LOG_ERR, "chdir(%s): %m", _PATH_DEV); | |
221be169 KM |
297 | exit(1); |
298 | } | |
52b4fb0c BJ |
299 | we = mywd.wd_we; |
300 | for (i = 0; i < utmpent; i++) { | |
221be169 | 301 | if (stat(we->we_utmp.out_line, &stb) >= 0) |
b1456c48 | 302 | we->we_idle = htonl(now - stb.st_atime); |
52b4fb0c BJ |
303 | we++; |
304 | } | |
5115d8df | 305 | (void)getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])); |
52b4fb0c | 306 | for (i = 0; i < 3; i++) |
353c1281 | 307 | mywd.wd_loadav[i] = htonl((u_long)(avenrun[i] * 100)); |
b1456c48 | 308 | cc = (char *)we - (char *)&mywd; |
b1456c48 | 309 | mywd.wd_sendtime = htonl(time(0)); |
7af17b3e SL |
310 | mywd.wd_vers = WHODVERSION; |
311 | mywd.wd_type = WHODTYPE_STATUS; | |
312 | for (np = neighbors; np != NULL; np = np->n_next) | |
5115d8df | 313 | (void)sendto(s, (char *)&mywd, cc, 0, |
0892992b | 314 | np->n_addr, np->n_addrlen); |
17ccb086 KB |
315 | if (utmpent && chdir(_PATH_RWHODIR)) { |
316 | syslog(LOG_ERR, "chdir(%s): %m", _PATH_RWHODIR); | |
221be169 KM |
317 | exit(1); |
318 | } | |
08d10f57 | 319 | done: |
83361bb3 | 320 | (void) alarm(AL_INTERVAL); |
52b4fb0c BJ |
321 | } |
322 | ||
0df908a9 | 323 | void |
cf498703 | 324 | getboottime(signo) |
55ae2764 | 325 | int signo; |
52b4fb0c | 326 | { |
83c99760 CT |
327 | int mib[2]; |
328 | size_t size; | |
cf498703 | 329 | struct timeval tm; |
52b4fb0c | 330 | |
cf498703 KM |
331 | mib[0] = CTL_KERN; |
332 | mib[1] = KERN_BOOTTIME; | |
333 | size = sizeof(tm); | |
334 | if (sysctl(mib, 2, &tm, &size, NULL, 0) == -1) { | |
335 | syslog(LOG_ERR, "cannot get boottime: %m"); | |
00cdc205 | 336 | exit(1); |
52b4fb0c | 337 | } |
cf498703 | 338 | mywd.wd_boottime = htonl(tm.tv_sec); |
52b4fb0c | 339 | } |
7af17b3e | 340 | |
0892992b KS |
341 | void |
342 | quit(msg) | |
55ae2764 | 343 | char *msg; |
0892992b KS |
344 | { |
345 | syslog(LOG_ERR, msg); | |
346 | exit(1); | |
347 | } | |
348 | ||
349 | #define ROUNDUP(a) \ | |
350 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) | |
351 | #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) | |
352 | ||
353 | void | |
354 | rt_xaddrs(cp, cplim, rtinfo) | |
355 | register caddr_t cp, cplim; | |
356 | register struct rt_addrinfo *rtinfo; | |
357 | { | |
358 | register struct sockaddr *sa; | |
359 | register int i; | |
360 | ||
5115d8df | 361 | memset(rtinfo->rti_info, 0, sizeof(rtinfo->rti_info)); |
0892992b KS |
362 | for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { |
363 | if ((rtinfo->rti_addrs & (1 << i)) == 0) | |
364 | continue; | |
365 | rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; | |
366 | ADVANCE(cp, sa); | |
367 | } | |
368 | } | |
369 | ||
7af17b3e SL |
370 | /* |
371 | * Figure out device configuration and select | |
372 | * networks which deserve status information. | |
373 | */ | |
55ae2764 | 374 | int |
7af17b3e SL |
375 | configure(s) |
376 | int s; | |
377 | { | |
7af17b3e | 378 | register struct neighbor *np; |
0892992b KS |
379 | register struct if_msghdr *ifm; |
380 | register struct ifa_msghdr *ifam; | |
0892992b | 381 | struct sockaddr_dl *sdl; |
d605e71a KM |
382 | size_t needed; |
383 | int mib[6], flags = 0, len; | |
0892992b KS |
384 | char *buf, *lim, *next; |
385 | struct rt_addrinfo info; | |
7af17b3e | 386 | |
d605e71a KM |
387 | mib[0] = CTL_NET; |
388 | mib[1] = PF_ROUTE; | |
389 | mib[2] = 0; | |
390 | mib[3] = AF_INET; | |
391 | mib[4] = NET_RT_IFLIST; | |
392 | mib[5] = 0; | |
393 | if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) | |
394 | quit("route-sysctl-estimate"); | |
0892992b KS |
395 | if ((buf = malloc(needed)) == NULL) |
396 | quit("malloc"); | |
d605e71a | 397 | if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) |
0892992b | 398 | quit("actual retrieval of interface table"); |
d605e71a | 399 | lim = buf + needed; |
0892992b | 400 | |
5115d8df | 401 | sdl = NULL; /* XXX just to keep gcc -Wall happy */ |
0892992b KS |
402 | for (next = buf; next < lim; next += ifm->ifm_msglen) { |
403 | ifm = (struct if_msghdr *)next; | |
404 | if (ifm->ifm_type == RTM_IFINFO) { | |
405 | sdl = (struct sockaddr_dl *)(ifm + 1); | |
406 | flags = ifm->ifm_flags; | |
7af17b3e SL |
407 | continue; |
408 | } | |
0892992b KS |
409 | if ((flags & IFF_UP) == 0 || |
410 | (flags & (IFF_BROADCAST|IFF_POINTOPOINT)) == 0) | |
7af17b3e | 411 | continue; |
0892992b | 412 | if (ifm->ifm_type != RTM_NEWADDR) |
d605e71a | 413 | quit("out of sync parsing NET_RT_IFLIST"); |
0892992b KS |
414 | ifam = (struct ifa_msghdr *)ifm; |
415 | info.rti_addrs = ifam->ifam_addrs; | |
416 | rt_xaddrs((char *)(ifam + 1), ifam->ifam_msglen + (char *)ifam, | |
417 | &info); | |
418 | /* gag, wish we could get rid of Internet dependencies */ | |
419 | #define dstaddr info.rti_info[RTAX_BRD] | |
420 | #define IPADDR_SA(x) ((struct sockaddr_in *)(x))->sin_addr.s_addr | |
421 | #define PORT_SA(x) ((struct sockaddr_in *)(x))->sin_port | |
422 | if (dstaddr == 0 || dstaddr->sa_family != AF_INET) | |
7af17b3e | 423 | continue; |
0892992b KS |
424 | PORT_SA(dstaddr) = sp->s_port; |
425 | for (np = neighbors; np != NULL; np = np->n_next) | |
5115d8df CT |
426 | if (memcmp(sdl->sdl_data, np->n_name, |
427 | sdl->sdl_nlen) == 0 && | |
428 | IPADDR_SA(np->n_addr) == IPADDR_SA(dstaddr)) | |
0892992b KS |
429 | break; |
430 | if (np != NULL) | |
7af17b3e | 431 | continue; |
0892992b KS |
432 | len = sizeof(*np) + dstaddr->sa_len + sdl->sdl_nlen + 1; |
433 | np = (struct neighbor *)malloc(len); | |
434 | if (np == NULL) | |
435 | quit("malloc of neighbor structure"); | |
5115d8df | 436 | memset(np, 0, len); |
0892992b KS |
437 | np->n_flags = flags; |
438 | np->n_addr = (struct sockaddr *)(np + 1); | |
439 | np->n_addrlen = dstaddr->sa_len; | |
440 | np->n_name = np->n_addrlen + (char *)np->n_addr; | |
7af17b3e SL |
441 | np->n_next = neighbors; |
442 | neighbors = np; | |
5115d8df CT |
443 | memcpy((char *)np->n_addr, (char *)dstaddr, np->n_addrlen); |
444 | memcpy(np->n_name, sdl->sdl_data, sdl->sdl_nlen); | |
7af17b3e | 445 | } |
0892992b | 446 | free(buf); |
7af17b3e SL |
447 | return (1); |
448 | } | |
b1456c48 SL |
449 | |
450 | #ifdef DEBUG | |
55ae2764 | 451 | void |
5115d8df | 452 | Sendto(s, buf, cc, flags, to, tolen) |
b1456c48 SL |
453 | int s; |
454 | char *buf; | |
455 | int cc, flags; | |
456 | char *to; | |
457 | int tolen; | |
458 | { | |
459 | register struct whod *w = (struct whod *)buf; | |
460 | register struct whoent *we; | |
461 | struct sockaddr_in *sin = (struct sockaddr_in *)to; | |
b1456c48 SL |
462 | |
463 | printf("sendto %x.%d\n", ntohl(sin->sin_addr), ntohs(sin->sin_port)); | |
464 | printf("hostname %s %s\n", w->wd_hostname, | |
9bd66dcf | 465 | interval(ntohl(w->wd_sendtime) - ntohl(w->wd_boottime), " up")); |
b1456c48 | 466 | printf("load %4.2f, %4.2f, %4.2f\n", |
9bd66dcf SL |
467 | ntohl(w->wd_loadav[0]) / 100.0, ntohl(w->wd_loadav[1]) / 100.0, |
468 | ntohl(w->wd_loadav[2]) / 100.0); | |
b1456c48 | 469 | cc -= WHDRSIZE; |
5115d8df | 470 | for (we = w->wd_we, cc /= sizeof(struct whoent); cc > 0; cc--, we++) { |
9bd66dcf | 471 | time_t t = ntohl(we->we_utmp.out_time); |
b1456c48 | 472 | printf("%-8.8s %s:%s %.12s", |
9bd66dcf SL |
473 | we->we_utmp.out_name, |
474 | w->wd_hostname, we->we_utmp.out_line, | |
475 | ctime(&t)+4); | |
476 | we->we_idle = ntohl(we->we_idle) / 60; | |
b1456c48 SL |
477 | if (we->we_idle) { |
478 | if (we->we_idle >= 100*60) | |
479 | we->we_idle = 100*60 - 1; | |
480 | if (we->we_idle >= 60) | |
481 | printf(" %2d", we->we_idle / 60); | |
482 | else | |
483 | printf(" "); | |
484 | printf(":%02d", we->we_idle % 60); | |
485 | } | |
486 | printf("\n"); | |
487 | } | |
488 | } | |
489 | ||
490 | char * | |
491 | interval(time, updown) | |
492 | int time; | |
493 | char *updown; | |
494 | { | |
495 | static char resbuf[32]; | |
496 | int days, hours, minutes; | |
497 | ||
498 | if (time < 0 || time > 3*30*24*60*60) { | |
499 | (void) sprintf(resbuf, " %s ??:??", updown); | |
500 | return (resbuf); | |
501 | } | |
502 | minutes = (time + 59) / 60; /* round to minutes */ | |
503 | hours = minutes / 60; minutes %= 60; | |
504 | days = hours / 24; hours %= 24; | |
505 | if (days) | |
506 | (void) sprintf(resbuf, "%s %2d+%02d:%02d", | |
507 | updown, days, hours, minutes); | |
508 | else | |
509 | (void) sprintf(resbuf, "%s %2d:%02d", | |
510 | updown, hours, minutes); | |
511 | return (resbuf); | |
512 | } | |
513 | #endif |