rusers.c revision 78456
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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35static const char rcsid[] = 36 "$FreeBSD: head/usr.bin/rusers/rusers.c 78456 2001-06-19 03:48:26Z mikeh $"; 37#endif /* not lint */ 38 39#include <sys/types.h> 40#include <sys/socket.h> 41#include <rpc/rpc.h> 42#include <rpc/pmap_clnt.h> 43#include <rpcsvc/rnusers.h> 44#include <arpa/inet.h> 45#include <err.h> 46#include <netdb.h> 47#include <stdio.h> 48#include <stdlib.h> 49#include <strings.h> 50#include <unistd.h> 51 52#define MAX_INT 0x7fffffff 53#define HOST_WIDTH 20 54#define LINE_WIDTH 15 55 56int longopt; 57int allopt; 58 59struct host_list { 60 struct host_list *next; 61 struct in_addr addr; 62} *hosts; 63 64int 65search_host(struct in_addr addr) 66{ 67 struct host_list *hp; 68 69 if (hosts == NULL) 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 79void 80remember_host(struct in_addr addr) 81{ 82 struct host_list *hp; 83 84 if ((hp = (struct host_list *)malloc(sizeof(struct host_list))) == NULL) 85 errx(1, "no memory"); 86 hp->addr.s_addr = addr.s_addr; 87 hp->next = hosts; 88 hosts = hp; 89} 90 91int 92rusers_reply(caddr_t replyp, struct sockaddr_in *raddrp) 93{ 94 int x, idle; 95 char date[32], idle_time[64], remote[64]; 96 struct hostent *hp; 97 utmpidlearr *up = (utmpidlearr *)replyp; 98 char *host; 99 int days, hours, minutes, seconds; 100 101 if (search_host(raddrp->sin_addr)) 102 return (0); 103 104 if (!allopt && up->utmpidlearr_len == 0) 105 return (0); 106 107 hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr, 108 sizeof(struct in_addr), 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 169void 170onehost(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, xdr_void, NULL, 190 xdr_utmpidlearr, &up, tv) != RPC_SUCCESS) 191 errx(1, "%s", clnt_sperror(rusers_clnt, "")); 192 addr.sin_addr.s_addr = *(int *)hp->h_addr; 193 rusers_reply((caddr_t)&up, &addr); 194 clnt_destroy(rusers_clnt); 195} 196 197void 198allhosts() 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, xdr_void, NULL, xdr_utmpidlearr, (char *)&up, 206 rusers_reply); 207 if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT) 208 errx(1, "%s", clnt_sperrno(clnt_stat)); 209} 210 211static void 212usage() 213{ 214 215 fprintf(stderr, "usage: rusers [-la] [hosts ...]\n"); 216 exit(1); 217} 218 219int 220main(int argc, char *argv[]) 221{ 222 int ch; 223 224 while ((ch = getopt(argc, argv, "al")) != -1) 225 switch (ch) { 226 case 'a': 227 allopt++; 228 break; 229 case 'l': 230 longopt++; 231 break; 232 default: 233 usage(); 234 /* NOTREACHED */ 235 } 236 237 setlinebuf(stdout); 238 if (argc == optind) 239 allhosts(); 240 else { 241 for (; optind < argc; optind++) 242 (void)onehost(argv[optind]); 243 } 244 exit(0); 245} 246