/* $NetBSD: rusers.c,v 1.17 2000/04/14 06:11:10 simonb Exp $ */ /*- * 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. */ #include #ifndef lint __RCSID("$NetBSD: rusers.c,v 1.17 2000/04/14 06:11:10 simonb Exp $"); #endif /* not lint */ #include #include #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 extern char *__progname; /* from crt0.o */ struct timeval timeout = { 25, 0 }; int longopt; int allopt; void allhosts __P((void)); int main __P((int, char *[])); void onehost __P((char *)); void remember_host __P((struct in_addr)); int rusers_reply __P((char *, struct sockaddr_in *)); int search_host __P((struct in_addr)); void usage __P((void)); 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)))) errx(1, "no memory"); hp->addr.s_addr = addr.s_addr; hp->next = hosts; hosts = hp; } int rusers_reply(char *replyp, struct sockaddr_in *raddrp) { int x; struct hostent *hp; struct utmpidlearr *up = (struct utmpidlearr *)replyp; char *host; 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); #define HOSTWID (int)sizeof(up->uia_arr[0]->ui_utmp.ut_host) #define LINEWID (int)sizeof(up->uia_arr[0]->ui_utmp.ut_line) #define NAMEWID (int)sizeof(up->uia_arr[0]->ui_utmp.ut_name) if (!longopt) printf("%-*.*s ", HOSTWID, HOSTWID, host); for (x = 0; x < up->uia_cnt; x++) { unsigned int minutes; char date[26], idle[8]; char remote[HOSTWID + 3]; /* "(" host ")" \0 */ char local[HOSTWID + LINEWID + 2]; /* host ":" line \0 */ if (!longopt) { printf("%.*s ", NAMEWID, up->uia_arr[x]->ui_utmp.ut_name); continue; } snprintf(local, sizeof(local), "%.*s:%s", HOSTWID, host, up->uia_arr[x]->ui_utmp.ut_line); snprintf(date, sizeof(date), "%s", &(ctime((time_t *)&(up->uia_arr[x]->ui_utmp.ut_time)))[4]); minutes = up->uia_arr[x]->ui_idle; if (minutes == MAX_INT) strcpy(idle, "??"); else if (minutes == 0) strcpy(idle, ""); else { unsigned int days, hours; days = minutes / (24 * 60); minutes %= (24 * 60); hours = minutes / 60; minutes %= 60; if (days > 0) snprintf(idle, sizeof(idle), "%d d ", days); else if (hours > 0) snprintf(idle, sizeof(idle), "%2d:%02d", hours, minutes); else snprintf(idle, sizeof(idle), ":%02d", minutes); } if (up->uia_arr[x]->ui_utmp.ut_host[0] != '\0') snprintf(remote, sizeof(remote), "(%.*s)", HOSTWID, up->uia_arr[x]->ui_utmp.ut_host); else remote[0] = '\0'; printf("%-*.*s %-*.*s %-12.12s %8.8s %s\n", NAMEWID, NAMEWID, up->uia_arr[x]->ui_utmp.ut_name, HOSTWID+LINEWID+1, HOSTWID+LINEWID+1, local, date, idle, remote); } if (!longopt) putchar('\n'); remember_host(raddrp->sin_addr); return(0); } void onehost(char *host) { struct utmpidlearr up; CLIENT *rusers_clnt; enum clnt_stat clnt_stat; struct sockaddr_in addr; struct hostent *hp; hp = gethostbyname(host); if (hp == NULL) errx(1, "unknown host \"%s\"", host); rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp"); if (rusers_clnt == NULL) { clnt_pcreateerror(__progname); exit(1); } memset((char *)&up, 0, sizeof(up)); clnt_stat = clnt_call(rusers_clnt, RUSERSPROC_NAMES, xdr_void, NULL, xdr_utmpidlearr, &up, timeout); if (clnt_stat != RPC_SUCCESS) errx(1, "%s", clnt_sperrno(clnt_stat)); 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; memset((char *)&up, 0, sizeof(up)); clnt_stat = clnt_broadcast(RUSERSPROG, RUSERSVERS_IDLE, RUSERSPROC_NAMES, xdr_void, NULL, xdr_utmpidlearr, (char *)&up, rusers_reply); if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT) errx(1, "%s", clnt_sperrno(clnt_stat)); } void usage(void) { fprintf(stderr, "Usage: %s [-la] [hosts ...]\n", __progname); exit(1); } int main(int argc, char *argv[]) { int ch; 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); }