1 /*- 2 * Copyright (c) 1993, John Brezak 3 * 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 * $FreeBSD: src/usr.bin/rusers/rusers.c,v 1.17 2005/05/21 09:55:08 ru Exp $ 30 * $DragonFly: src/usr.bin/rusers/rusers.c,v 1.4 2008/10/16 01:52:33 swildner Exp $ 31 */ 32 33 #include <sys/types.h> 34 #include <sys/socket.h> 35 36 #include <rpc/rpc.h> 37 #include <rpc/pmap_clnt.h> 38 #include <rpcsvc/rnusers.h> 39 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 <unistd.h> 48 49 #define MAX_INT 0x7fffffff 50 #define HOST_WIDTH 20 51 #define LINE_WIDTH 15 52 53 int longopt; 54 int allopt; 55 56 struct host_list { 57 struct host_list *next; 58 struct in_addr addr; 59 } *hosts; 60 61 static int 62 search_host(struct in_addr addr) 63 { 64 struct host_list *hp; 65 66 if (hosts == NULL) 67 return (0); 68 69 for (hp = hosts; hp != NULL; hp = hp->next) { 70 if (hp->addr.s_addr == addr.s_addr) 71 return (1); 72 } 73 return (0); 74 } 75 76 static void 77 remember_host(struct in_addr addr) 78 { 79 struct host_list *hp; 80 81 if ((hp = (struct host_list *)malloc(sizeof(struct host_list))) == NULL) 82 errx(1, "no memory"); 83 hp->addr.s_addr = addr.s_addr; 84 hp->next = hosts; 85 hosts = hp; 86 } 87 88 static int 89 rusers_reply(caddr_t replyp, struct sockaddr_in *raddrp) 90 { 91 u_int x; 92 int idle; 93 char date[32], idle_time[64], remote[64]; 94 struct hostent *hp; 95 utmpidlearr *up, u; 96 char *host; 97 int days, hours, minutes, seconds; 98 99 up = &u; 100 memcpy(up, replyp, sizeof(*up)); 101 if (search_host(raddrp->sin_addr)) 102 return (0); 103 104 if (!allopt && up->utmpidlearr_len == 0) 105 return (0); 106 107 hp = gethostbyaddr(&raddrp->sin_addr.s_addr, sizeof(struct in_addr), 108 AF_INET); 109 if (hp != NULL) 110 host = hp->h_name; 111 else 112 host = inet_ntoa(raddrp->sin_addr); 113 114 if (!longopt) 115 printf("%-*s ", HOST_WIDTH, host); 116 117 for (x = 0; x < up->utmpidlearr_len; x++) { 118 strncpy(date, 119 &(ctime((time_t *)&(up->utmpidlearr_val[x].ui_utmp.ut_time))[4]), 120 sizeof(date) - 1); 121 122 idle = up->utmpidlearr_val[x].ui_idle; 123 sprintf(idle_time, " :%02d", idle); 124 if (idle == MAX_INT) 125 strcpy(idle_time, "??"); 126 else if (idle == 0) 127 strcpy(idle_time, ""); 128 else { 129 seconds = idle; 130 days = seconds / (60 * 60 * 24); 131 seconds %= (60 * 60 * 24); 132 hours = seconds / (60 * 60); 133 seconds %= (60 * 60); 134 minutes = seconds / 60; 135 seconds %= 60; 136 if (idle > 60) 137 sprintf(idle_time, "%d:%02d", minutes, seconds); 138 if (idle >= (60 * 60)) 139 sprintf(idle_time, "%d:%02d:%02d", 140 hours, minutes, seconds); 141 if (idle >= (24 * 60 * 60)) 142 sprintf(idle_time, "%d days, %d:%02d:%02d", 143 days, hours, minutes, seconds); 144 } 145 146 strncpy(remote, up->utmpidlearr_val[x].ui_utmp.ut_host, 147 sizeof(remote) - 1); 148 if (strlen(remote) != 0) 149 sprintf(remote, "(%.16s)", 150 up->utmpidlearr_val[x].ui_utmp.ut_host); 151 152 if (longopt) 153 printf("%-8.8s %*s:%-*.*s %-12.12s %6s %.18s\n", 154 up->utmpidlearr_val[x].ui_utmp.ut_name, 155 HOST_WIDTH, host, LINE_WIDTH, LINE_WIDTH, 156 up->utmpidlearr_val[x].ui_utmp.ut_line, date, 157 idle_time, remote ); 158 else 159 printf("%s ", 160 up->utmpidlearr_val[x].ui_utmp.ut_name); 161 } 162 if (!longopt) 163 putchar('\n'); 164 165 remember_host(raddrp->sin_addr); 166 return (0); 167 } 168 169 static void 170 onehost(char *host) 171 { 172 utmpidlearr up; 173 CLIENT *rusers_clnt; 174 struct sockaddr_in addr; 175 struct hostent *hp; 176 struct timeval tv; 177 178 hp = gethostbyname(host); 179 if (hp == NULL) 180 errx(1, "unknown host \"%s\"", host); 181 182 rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp"); 183 if (rusers_clnt == NULL) 184 errx(1, "%s", clnt_spcreateerror("")); 185 186 bzero((char *)&up, sizeof(up)); 187 tv.tv_sec = 15; /* XXX ?? */ 188 tv.tv_usec = 0; 189 if (clnt_call(rusers_clnt, RUSERSPROC_NAMES, (xdrproc_t)xdr_void, NULL, 190 (xdrproc_t)xdr_utmpidlearr, &up, tv) != RPC_SUCCESS) 191 errx(1, "%s", clnt_sperror(rusers_clnt, "")); 192 memcpy(&addr.sin_addr.s_addr, hp->h_addr, sizeof(addr.sin_addr.s_addr)); 193 rusers_reply((caddr_t)&up, &addr); 194 clnt_destroy(rusers_clnt); 195 } 196 197 static void 198 allhosts(void) 199 { 200 utmpidlearr up; 201 enum clnt_stat clnt_stat; 202 203 bzero((char *)&up, sizeof(up)); 204 clnt_stat = clnt_broadcast(RUSERSPROG, RUSERSVERS_IDLE, 205 RUSERSPROC_NAMES, (xdrproc_t)xdr_void, NULL, 206 (xdrproc_t)xdr_utmpidlearr, (char *)&up, 207 (resultproc_t)rusers_reply); 208 if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT) 209 errx(1, "%s", clnt_sperrno(clnt_stat)); 210 } 211 212 static void 213 usage(void) 214 { 215 216 fprintf(stderr, "usage: rusers [-al] [host ...]\n"); 217 exit(1); 218 } 219 220 int 221 main(int argc, char *argv[]) 222 { 223 int ch; 224 225 while ((ch = getopt(argc, argv, "al")) != -1) 226 switch (ch) { 227 case 'a': 228 allopt++; 229 break; 230 case 'l': 231 longopt++; 232 break; 233 default: 234 usage(); 235 /* NOTREACHED */ 236 } 237 238 setlinebuf(stdout); 239 if (argc == optind) 240 allhosts(); 241 else { 242 for (; optind < argc; optind++) 243 onehost(argv[optind]); 244 } 245 exit(0); 246 } 247