rusers.c revision 1.24
1 /* $NetBSD: rusers.c,v 1.24 2011/08/30 17:06:21 plunky Exp $ */ 2 3 /*- 4 * Copyright (c) 1993 John Brezak 5 * 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. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 27 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 #ifndef lint 33 __RCSID("$NetBSD: rusers.c,v 1.24 2011/08/30 17:06:21 plunky Exp $"); 34 #endif /* not lint */ 35 36 #include <sys/types.h> 37 #include <sys/socket.h> 38 39 #include <rpc/rpc.h> 40 #include <arpa/inet.h> 41 42 #include <err.h> 43 #include <netdb.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <time.h> 48 #include <unistd.h> 49 #include <utmp.h> 50 51 /* 52 * For now we only try version 2 of the protocol. The current 53 * version is 3 (rusers.h), but only Solaris and NetBSD seem 54 * to support it currently. 55 */ 56 #include <rpcsvc/rnusers.h> /* Old version */ 57 58 59 #define MAX_INT 0x7fffffff 60 61 struct timeval timeout = { 25, 0 }; 62 int longopt; 63 int allopt; 64 65 void allhosts(void); 66 int main(int, char *[]); 67 void onehost(char *); 68 void remember_host(struct sockaddr *); 69 int rusers_reply(char *, struct netbuf *, struct netconfig *); 70 int search_host(struct sockaddr *); 71 void usage(void); 72 73 struct host_list { 74 struct host_list *next; 75 int family; 76 union { 77 struct in6_addr _addr6; 78 struct in_addr _addr4; 79 } addr; 80 } *hosts; 81 82 #define addr6 addr._addr6 83 #define addr4 addr._addr4 84 85 int 86 search_host(struct sockaddr *sa) 87 { 88 struct host_list *hp; 89 90 if (!hosts) 91 return(0); 92 93 for (hp = hosts; hp != NULL; hp = hp->next) { 94 switch (hp->family) { 95 case AF_INET6: 96 if (!memcmp(&hp->addr6, 97 &((struct sockaddr_in6 *)sa)->sin6_addr, 98 sizeof (struct in6_addr))) 99 return 1; 100 break; 101 case AF_INET: 102 if (!memcmp(&hp->addr4, 103 &((struct sockaddr_in *)sa)->sin_addr, 104 sizeof (struct in_addr))) 105 return 1; 106 break; 107 default: 108 break; 109 } 110 } 111 return(0); 112 } 113 114 void 115 remember_host(struct sockaddr *sa) 116 { 117 struct host_list *hp; 118 119 if (!(hp = (struct host_list *)malloc(sizeof(struct host_list)))) { 120 err(1, "malloc"); 121 /* NOTREACHED */ 122 } 123 hp->family = sa->sa_family; 124 hp->next = hosts; 125 switch (sa->sa_family) { 126 case AF_INET6: 127 memcpy(&hp->addr6, &((struct sockaddr_in6 *)sa)->sin6_addr, 128 sizeof (struct in6_addr)); 129 break; 130 case AF_INET: 131 memcpy(&hp->addr4, &((struct sockaddr_in *)sa)->sin_addr, 132 sizeof (struct in_addr)); 133 break; 134 default: 135 err(1, "unknown address family"); 136 /* NOTREACHED */ 137 } 138 hosts = hp; 139 } 140 141 int 142 rusers_reply(char *replyp, struct netbuf *raddrp, struct netconfig *nconf) 143 { 144 char host[NI_MAXHOST]; 145 int x; 146 struct utmpidlearr *up = (struct utmpidlearr *)replyp; 147 struct sockaddr *sa = raddrp->buf; 148 149 if (search_host(sa)) 150 return(0); 151 152 if (!allopt && !up->uia_cnt) 153 return(0); 154 155 if (getnameinfo(sa, sa->sa_len, host, sizeof host, NULL, 0, 0)) 156 return 0; 157 158 #define HOSTWID (int)sizeof(up->uia_arr[0]->ui_utmp.ut_host) 159 #define LINEWID (int)sizeof(up->uia_arr[0]->ui_utmp.ut_line) 160 #define NAMEWID (int)sizeof(up->uia_arr[0]->ui_utmp.ut_name) 161 162 if (!longopt) 163 printf("%-*.*s ", HOSTWID, HOSTWID, host); 164 165 for (x = 0; x < up->uia_cnt; x++) { 166 unsigned int minutes; 167 char date[26], idle[8]; 168 char remote[HOSTWID + 3]; /* "(" host ")" \0 */ 169 char local[HOSTWID + LINEWID + 2]; /* host ":" line \0 */ 170 time_t uttime; 171 172 if (!longopt) { 173 printf("%.*s ", NAMEWID, 174 up->uia_arr[x]->ui_utmp.ut_name); 175 continue; 176 } 177 178 snprintf(local, sizeof(local), "%.*s:%s", 179 HOSTWID, host, 180 up->uia_arr[x]->ui_utmp.ut_line); 181 182 uttime = up->uia_arr[x]->ui_utmp.ut_time; 183 snprintf(date, sizeof(date), "%s", 184 &(ctime(&uttime))[4]); 185 186 minutes = up->uia_arr[x]->ui_idle; 187 if (minutes == MAX_INT) 188 strcpy(idle, "??"); 189 else if (minutes == 0) 190 strcpy(idle, ""); 191 else { 192 unsigned int days, hours; 193 194 days = minutes / (24 * 60); 195 minutes %= (24 * 60); 196 hours = minutes / 60; 197 minutes %= 60; 198 199 if (days > 0) 200 snprintf(idle, sizeof(idle), "%d d ", days); 201 else if (hours > 0) 202 snprintf(idle, sizeof(idle), "%2d:%02d", 203 hours, minutes); 204 else 205 snprintf(idle, sizeof(idle), ":%02d", minutes); 206 } 207 208 if (up->uia_arr[x]->ui_utmp.ut_host[0] != '\0') 209 snprintf(remote, sizeof(remote), "(%.*s)", 210 HOSTWID, up->uia_arr[x]->ui_utmp.ut_host); 211 else 212 remote[0] = '\0'; 213 214 printf("%-*.*s %-*.*s %-12.12s %8.8s %s\n", 215 NAMEWID, NAMEWID, up->uia_arr[x]->ui_utmp.ut_name, 216 HOSTWID+LINEWID+1, HOSTWID+LINEWID+1, local, 217 date, idle, remote); 218 } 219 if (!longopt) 220 putchar('\n'); 221 222 remember_host(sa); 223 return(0); 224 } 225 226 void 227 onehost(char *host) 228 { 229 struct utmpidlearr up; 230 CLIENT *rusers_clnt; 231 enum clnt_stat clnt_stat; 232 struct netbuf nb; 233 struct addrinfo *ai; 234 int ecode; 235 236 rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp"); 237 if (rusers_clnt == NULL) { 238 clnt_pcreateerror(getprogname()); 239 exit(1); 240 } 241 242 ecode = getaddrinfo(host, NULL, NULL, &ai); 243 if (ecode != 0) 244 err(1, "%s", gai_strerror(ecode)); 245 246 memset((char *)&up, 0, sizeof(up)); 247 clnt_stat = clnt_call(rusers_clnt, RUSERSPROC_NAMES, xdr_void, NULL, 248 xdr_utmpidlearr, &up, timeout); 249 if (clnt_stat != RPC_SUCCESS) 250 errx(1, "%s", clnt_sperrno(clnt_stat)); 251 nb.buf = ai->ai_addr; 252 nb.len = nb.maxlen = ai->ai_addrlen; 253 rusers_reply((char *)&up, &nb, NULL); 254 freeaddrinfo(ai); 255 } 256 257 void 258 allhosts(void) 259 { 260 struct utmpidlearr up; 261 enum clnt_stat clnt_stat; 262 263 memset((char *)&up, 0, sizeof(up)); 264 clnt_stat = rpc_broadcast(RUSERSPROG, RUSERSVERS_IDLE, 265 RUSERSPROC_NAMES, (xdrproc_t)xdr_void, NULL, 266 (xdrproc_t)xdr_utmpidlearr, (char *)&up, 267 (resultproc_t)rusers_reply, "udp"); 268 if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT) 269 errx(1, "%s", clnt_sperrno(clnt_stat)); 270 } 271 272 void 273 usage(void) 274 { 275 fprintf(stderr, "usage: %s [-la] [hosts ...]\n", getprogname()); 276 exit(1); 277 } 278 279 int 280 main(int argc, char *argv[]) 281 { 282 int ch; 283 284 while ((ch = getopt(argc, argv, "al")) != -1) 285 switch (ch) { 286 case 'a': 287 allopt++; 288 break; 289 case 'l': 290 longopt++; 291 break; 292 default: 293 usage(); 294 /*NOTREACHED*/ 295 } 296 297 setlinebuf(stdout); 298 if (argc == optind) 299 allhosts(); 300 else { 301 for (; optind < argc; optind++) 302 (void) onehost(argv[optind]); 303 } 304 exit(0); 305 } 306
Indexes created Mon Sep 29 18:09:42 GMT 2025