rusers.c revision 1.9
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. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef lint 30 static char rcsid[] = "$Id: rusers.c,v 1.9 1993/12/03 23:39:15 deraadt Exp $"; 31 #endif /* not lint */ 32 33 #include <sys/types.h> 34 #include <sys/param.h> 35 #include <sys/socket.h> 36 #include <netdb.h> 37 #include <stdio.h> 38 #include <strings.h> 39 #include <rpc/rpc.h> 40 #include <arpa/inet.h> 41 #include <utmp.h> 42 #include <stdlib.h> 43 44 /* 45 * For now we only try version 2 of the protocol. The current 46 * version is 3 (rusers.h), but only Solaris and NetBSD seem 47 * to support it currently. 48 */ 49 #include <rpcsvc/rnusers.h> /* Old version */ 50 51 #define MAX_INT 0x7fffffff 52 #define HOST_WIDTH 20 53 #define LINE_WIDTH 8 54 char *argv0; 55 56 int longopt; 57 int allopt; 58 59 struct host_list { 60 struct host_list *next; 61 struct in_addr addr; 62 } *hosts; 63 64 int 65 search_host(struct in_addr addr) 66 { 67 struct host_list *hp; 68 69 if (!hosts) 70 return(0); 71 72 for (hp = hosts; hp != NULL; hp = hp->next) { 73 if (hp->addr.s_addr == addr.s_addr) 74 return(1); 75 } 76 return(0); 77 } 78 79 void 80 remember_host(struct in_addr addr) 81 { 82 struct host_list *hp; 83 84 if (!(hp = (struct host_list *)malloc(sizeof(struct host_list)))) { 85 fprintf(stderr, "%s: no memory.\n", argv0); 86 exit(1); 87 } 88 hp->addr.s_addr = addr.s_addr; 89 hp->next = hosts; 90 hosts = hp; 91 } 92 93 int 94 rusers_reply(char *replyp, struct sockaddr_in *raddrp) 95 { 96 int x, idle; 97 char date[32], idle_time[64], remote[64], local[64]; 98 struct hostent *hp; 99 struct utmpidlearr *up = (struct utmpidlearr *)replyp; 100 char *host; 101 int days, hours, minutes, seconds; 102 103 if (search_host(raddrp->sin_addr)) 104 return(0); 105 106 if (!allopt && !up->uia_cnt) 107 return(0); 108 109 hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr, 110 sizeof(struct in_addr), AF_INET); 111 if (hp) 112 host = hp->h_name; 113 else 114 host = inet_ntoa(raddrp->sin_addr); 115 116 if (!longopt) 117 printf("%-*.*s ", HOST_WIDTH, HOST_WIDTH, host); 118 119 for (x = 0; x < up->uia_cnt; x++) { 120 strncpy(date, 121 &(ctime((time_t *)&(up->uia_arr[x]->ui_utmp.ut_time))[4]), 122 sizeof(date)-1); 123 124 idle = up->uia_arr[x]->ui_idle; 125 sprintf(idle_time, " :%02d", idle); 126 if (idle == MAX_INT) 127 strcpy(idle_time, "??"); 128 else if (idle == 0) 129 strcpy(idle_time, ""); 130 else { 131 seconds = idle; 132 days = seconds/(60*60*24); 133 seconds %= (60*60*24); 134 hours = seconds/(60*60); 135 seconds %= (60*60); 136 minutes = seconds/60; 137 seconds %= 60; 138 if (idle > 60) 139 sprintf(idle_time, "%2d:%02d", 140 minutes, seconds); 141 if (idle >= (60*60)) 142 sprintf(idle_time, "%2d:%02d:%02d", 143 hours, minutes, seconds); 144 if (idle >= (24*60*60)) 145 sprintf(idle_time, "%d days, %d:%02d:%02d", 146 days, hours, minutes, seconds); 147 } 148 149 strncpy(remote, up->uia_arr[x]->ui_utmp.ut_host, 150 sizeof(remote)-1); 151 if (strlen(remote) != 0) 152 sprintf(remote, "(%.16s)", 153 up->uia_arr[x]->ui_utmp.ut_host); 154 155 if (longopt) { 156 strncpy(local, host, sizeof(local)); 157 local[HOST_WIDTH + LINE_WIDTH + 1 - 158 strlen(up->uia_arr[x]->ui_utmp.ut_line) - 1] = 0; 159 strcat(local, ":"); 160 strcat(local, up->uia_arr[x]->ui_utmp.ut_line); 161 162 printf("%-8.8s %-*.*s %-12.12s %8s %.18s\n", 163 up->uia_arr[x]->ui_utmp.ut_name, 164 HOST_WIDTH+LINE_WIDTH+1, HOST_WIDTH+LINE_WIDTH+1, local, 165 date, 166 idle_time, 167 remote); 168 } else 169 printf("%0.8s ", 170 up->uia_arr[x]->ui_utmp.ut_name); 171 } 172 if (!longopt) 173 putchar('\n'); 174 175 remember_host(raddrp->sin_addr); 176 return(0); 177 } 178 179 void 180 onehost(char *host) 181 { 182 struct utmpidlearr up; 183 CLIENT *rusers_clnt; 184 struct sockaddr_in addr; 185 struct hostent *hp; 186 187 hp = gethostbyname(host); 188 if (hp == NULL) { 189 fprintf(stderr, "%s: unknown host \"%s\"\n", 190 argv0, host); 191 exit(1); 192 } 193 194 rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp"); 195 if (rusers_clnt == NULL) { 196 clnt_pcreateerror(argv0); 197 exit(1); 198 } 199 200 bzero((char *)&up, sizeof(up)); 201 if (clnt_call(rusers_clnt, RUSERSPROC_NAMES, xdr_void, NULL, 202 xdr_utmpidlearr, &up, NULL) != RPC_SUCCESS) { 203 clnt_perror(rusers_clnt, argv0); 204 exit(1); 205 } 206 addr.sin_addr.s_addr = *(int *)hp->h_addr; 207 rusers_reply((char *)&up, &addr); 208 } 209 210 void 211 allhosts(void) 212 { 213 struct utmpidlearr up; 214 enum clnt_stat clnt_stat; 215 216 bzero((char *)&up, sizeof(up)); 217 clnt_stat = clnt_broadcast(RUSERSPROG, RUSERSVERS_IDLE, 218 RUSERSPROC_NAMES, xdr_void, NULL, xdr_utmpidlearr, 219 &up, rusers_reply); 220 if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT) { 221 fprintf(stderr, "%s: %s\n", argv0, clnt_sperrno(clnt_stat)); 222 exit(1); 223 } 224 } 225 226 void usage(void) 227 { 228 fprintf(stderr, "Usage: %s [-la] [hosts ...]\n", argv0); 229 exit(1); 230 } 231 232 void main(int argc, char *argv[]) 233 { 234 int ch; 235 extern int optind; 236 237 if (!(argv0 = rindex(argv[0], '/'))) 238 argv0 = argv[0]; 239 else 240 argv0++; 241 242 243 while ((ch = getopt(argc, argv, "al")) != -1) 244 switch (ch) { 245 case 'a': 246 allopt++; 247 break; 248 case 'l': 249 longopt++; 250 break; 251 default: 252 usage(); 253 /*NOTREACHED*/ 254 } 255 256 setlinebuf(stdout); 257 if (argc == optind) 258 allhosts(); 259 else { 260 for (; optind < argc; optind++) 261 (void) onehost(argv[optind]); 262 } 263 exit(0); 264 } 265
Indexes created Sun Sep 28 07:09:56 GMT 2025