/*- * Copyright (c) 1993 John Brezak * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef lint static char rcsid[] = "$Id: rusers.c,v 1.1 1995/10/18 08:46:04 deraadt Exp $"; #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include /* * For now we only try version 2 of the protocol. The current * version is 3 (rusers.h), but only Solaris and NetBSD seem * to support it currently. */ #include /* Old version */ #define MAX_INT 0x7fffffff #define HOST_WIDTH 20 #define LINE_WIDTH 8 char *argv0; struct timeval timeout = { 25, 0 }; int longopt; int allopt; struct host_list { struct host_list *next; struct in_addr addr; } *hosts; int search_host(struct in_addr addr) { struct host_list *hp; if (!hosts) return(0); for (hp = hosts; hp != NULL; hp = hp->next) { if (hp->addr.s_addr == addr.s_addr) return(1); } return(0); } void remember_host(struct in_addr addr) { struct host_list *hp; if (!(hp = (struct host_list *)malloc(sizeof(struct host_list)))) { fprintf(stderr, "%s: no memory.\n", argv0); exit(1); } hp->addr.s_addr = addr.s_addr; hp->next = hosts; hosts = hp; } int rusers_reply(char *replyp, struct sockaddr_in *raddrp) { int x, idle; char date[32], idle_time[64], remote[64], local[64]; struct hostent *hp; struct utmpidlearr *up = (struct utmpidlearr *)replyp; char *host; int days, hours, minutes, seconds; if (search_host(raddrp->sin_addr)) return(0); if (!allopt && !up->uia_cnt) return(0); hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr, sizeof(struct in_addr), AF_INET); if (hp) host = hp->h_name; else host = inet_ntoa(raddrp->sin_addr); if (!longopt) printf("%-*.*s ", HOST_WIDTH, HOST_WIDTH, host); for (x = 0; x < up->uia_cnt; x++) { strncpy(date, &(ctime((time_t *)&(up->uia_arr[x]->ui_utmp.ut_time))[4]), sizeof(date)-1); idle = up->uia_arr[x]->ui_idle; sprintf(idle_time, " :%02d", idle); if (idle == MAX_INT) strcpy(idle_time, "??"); else if (idle == 0) strcpy(idle_time, ""); else { seconds = idle; days = seconds/(60*60*24); seconds %= (60*60*24); hours = seconds/(60*60); seconds %= (60*60); minutes = seconds/60; seconds %= 60; if (idle > 60) sprintf(idle_time, "%2d:%02d", minutes, seconds); if (idle >= (60*60)) sprintf(idle_time, "%2d:%02d:%02d", hours, minutes, seconds); if (idle >= (24*60*60)) sprintf(idle_time, "%d days, %d:%02d:%02d", days, hours, minutes, seconds); } strncpy(remote, up->uia_arr[x]->ui_utmp.ut_host, sizeof(remote)-1); if (strlen(remote) != 0) sprintf(remote, "(%.16s)", up->uia_arr[x]->ui_utmp.ut_host); if (longopt) { strncpy(local, host, sizeof(local)); local[HOST_WIDTH + LINE_WIDTH + 1 - strlen(up->uia_arr[x]->ui_utmp.ut_line) - 1] = 0; strcat(local, ":"); strcat(local, up->uia_arr[x]->ui_utmp.ut_line); printf("%-8.8s %-*.*s %-12.12s %8s %.18s\n", up->uia_arr[x]->ui_utmp.ut_name, HOST_WIDTH+LINE_WIDTH+1, HOST_WIDTH+LINE_WIDTH+1, local, date, idle_time, remote); } else printf("%0.8s ", up->uia_arr[x]->ui_utmp.ut_name); } if (!longopt) putchar('\n'); remember_host(raddrp->sin_addr); return(0); } void onehost(char *host) { struct utmpidlearr up; CLIENT *rusers_clnt; struct sockaddr_in addr; struct hostent *hp; hp = gethostbyname(host); if (hp == NULL) { fprintf(stderr, "%s: unknown host \"%s\"\n", argv0, host); exit(1); } rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp"); if (rusers_clnt == NULL) { clnt_pcreateerror(argv0); exit(1); } bzero((char *)&up, sizeof(up)); if (clnt_call(rusers_clnt, RUSERSPROC_NAMES, xdr_void, NULL, xdr_utmpidlearr, &up, timeout) != RPC_SUCCESS) { clnt_perror(rusers_clnt, argv0); exit(1); } addr.sin_addr.s_addr = *(int *)hp->h_addr; rusers_reply((char *)&up, &addr); } void allhosts(void) { struct utmpidlearr up; enum clnt_stat clnt_stat; bzero((char *)&up, sizeof(up)); clnt_stat = clnt_broadcast(RUSERSPROG, RUSERSVERS_IDLE, RUSERSPROC_NAMES, xdr_void, NULL, xdr_utmpidlearr, &up, rusers_reply); if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT) { fprintf(stderr, "%s: %s\n", argv0, clnt_sperrno(clnt_stat)); exit(1); } } void usage(void) { fprintf(stderr, "Usage: %s [-la] [hosts ...]\n", argv0); exit(1); } void main(int argc, char *argv[]) { int ch; extern int optind; if (!(argv0 = rindex(argv[0], '/'))) argv0 = argv[0]; else argv0++; while ((ch = getopt(argc, argv, "al")) != -1) switch (ch) { case 'a': allopt++; break; case 'l': longopt++; break; default: usage(); /*NOTREACHED*/ } setlinebuf(stdout); if (argc == optind) allhosts(); else { for (; optind < argc; optind++) (void) onehost(argv[optind]); } exit(0); }