1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate * 22*7c478bd9Sstevel@tonic-gate * Copyright 2002 Sun Microsystems, Inc. All rights reserved. 23*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 24*7c478bd9Sstevel@tonic-gate */ 25*7c478bd9Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 26*7c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 27*7c478bd9Sstevel@tonic-gate /* 28*7c478bd9Sstevel@tonic-gate * University Copyright- Copyright (c) 1982, 1986, 1988 29*7c478bd9Sstevel@tonic-gate * The Regents of the University of California 30*7c478bd9Sstevel@tonic-gate * All Rights Reserved 31*7c478bd9Sstevel@tonic-gate * 32*7c478bd9Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from 33*7c478bd9Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its 34*7c478bd9Sstevel@tonic-gate * contributors. 35*7c478bd9Sstevel@tonic-gate */ 36*7c478bd9Sstevel@tonic-gate 37*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 38*7c478bd9Sstevel@tonic-gate 39*7c478bd9Sstevel@tonic-gate /* 40*7c478bd9Sstevel@tonic-gate * rwall_subr.c 41*7c478bd9Sstevel@tonic-gate * The server procedure for rwalld 42*7c478bd9Sstevel@tonic-gate */ 43*7c478bd9Sstevel@tonic-gate 44*7c478bd9Sstevel@tonic-gate #include <stdio.h> 45*7c478bd9Sstevel@tonic-gate #include <stdlib.h> 46*7c478bd9Sstevel@tonic-gate #include <unistd.h> 47*7c478bd9Sstevel@tonic-gate #include <rpc/rpc.h> 48*7c478bd9Sstevel@tonic-gate #include <thread.h> 49*7c478bd9Sstevel@tonic-gate #include <rpcsvc/rwall.h> 50*7c478bd9Sstevel@tonic-gate #include <sys/types.h> 51*7c478bd9Sstevel@tonic-gate #include <sys/stat.h> 52*7c478bd9Sstevel@tonic-gate #include <syslog.h> 53*7c478bd9Sstevel@tonic-gate #include <string.h> 54*7c478bd9Sstevel@tonic-gate 55*7c478bd9Sstevel@tonic-gate #define WALL_PROG "/usr/sbin/wall" 56*7c478bd9Sstevel@tonic-gate 57*7c478bd9Sstevel@tonic-gate static mutex_t wall_mutex = DEFAULTMUTEX; 58*7c478bd9Sstevel@tonic-gate static char *oldmsg; 59*7c478bd9Sstevel@tonic-gate 60*7c478bd9Sstevel@tonic-gate /* ARGSUSED */ 61*7c478bd9Sstevel@tonic-gate bool_t 62*7c478bd9Sstevel@tonic-gate wallproc_wall_1_svc(wrapstring *argp, void *res, struct svc_req *rqstp) 63*7c478bd9Sstevel@tonic-gate { 64*7c478bd9Sstevel@tonic-gate char *msg; 65*7c478bd9Sstevel@tonic-gate FILE *fp; 66*7c478bd9Sstevel@tonic-gate int rval; 67*7c478bd9Sstevel@tonic-gate struct stat wall; 68*7c478bd9Sstevel@tonic-gate 69*7c478bd9Sstevel@tonic-gate msg = *argp; 70*7c478bd9Sstevel@tonic-gate 71*7c478bd9Sstevel@tonic-gate /* 72*7c478bd9Sstevel@tonic-gate * Do not wall the same message twice in case of a retransmission 73*7c478bd9Sstevel@tonic-gate * in the rare case that two walls arrive close enough with 74*7c478bd9Sstevel@tonic-gate * a retransmission we might get a duplicate, but that is OK. 75*7c478bd9Sstevel@tonic-gate */ 76*7c478bd9Sstevel@tonic-gate (void) mutex_lock(&wall_mutex); 77*7c478bd9Sstevel@tonic-gate if ((oldmsg != 0) && (strcmp(msg, oldmsg) == 0)) { 78*7c478bd9Sstevel@tonic-gate (void) mutex_unlock(&wall_mutex); 79*7c478bd9Sstevel@tonic-gate return (TRUE); 80*7c478bd9Sstevel@tonic-gate } 81*7c478bd9Sstevel@tonic-gate 82*7c478bd9Sstevel@tonic-gate if (oldmsg) 83*7c478bd9Sstevel@tonic-gate free(oldmsg); 84*7c478bd9Sstevel@tonic-gate oldmsg = strdup(msg); 85*7c478bd9Sstevel@tonic-gate 86*7c478bd9Sstevel@tonic-gate rval = stat(WALL_PROG, &wall); 87*7c478bd9Sstevel@tonic-gate 88*7c478bd9Sstevel@tonic-gate /* 89*7c478bd9Sstevel@tonic-gate * Make sure the wall programs exists, is executeable, and runs 90*7c478bd9Sstevel@tonic-gate */ 91*7c478bd9Sstevel@tonic-gate if (rval == -1 || (wall.st_mode & S_IXUSR) == 0 || 92*7c478bd9Sstevel@tonic-gate (fp = popen(WALL_PROG, "w")) == NULL) { 93*7c478bd9Sstevel@tonic-gate syslog(LOG_NOTICE, 94*7c478bd9Sstevel@tonic-gate "rwall message received but could not execute %s", 95*7c478bd9Sstevel@tonic-gate WALL_PROG); 96*7c478bd9Sstevel@tonic-gate syslog(LOG_NOTICE, "%s", msg); 97*7c478bd9Sstevel@tonic-gate #ifdef DEBUG 98*7c478bd9Sstevel@tonic-gate (void) fprintf(stderr, 99*7c478bd9Sstevel@tonic-gate "rwall message received but could not execute %s", 100*7c478bd9Sstevel@tonic-gate WALL_PROG); 101*7c478bd9Sstevel@tonic-gate (void) fprintf(stderr, "%s", msg); 102*7c478bd9Sstevel@tonic-gate #endif 103*7c478bd9Sstevel@tonic-gate (void) mutex_unlock(&wall_mutex); 104*7c478bd9Sstevel@tonic-gate return (TRUE); 105*7c478bd9Sstevel@tonic-gate } 106*7c478bd9Sstevel@tonic-gate 107*7c478bd9Sstevel@tonic-gate (void) fprintf(fp, "%s", msg); 108*7c478bd9Sstevel@tonic-gate (void) pclose(fp); 109*7c478bd9Sstevel@tonic-gate (void) mutex_unlock(&wall_mutex); 110*7c478bd9Sstevel@tonic-gate 111*7c478bd9Sstevel@tonic-gate return (TRUE); 112*7c478bd9Sstevel@tonic-gate } 113*7c478bd9Sstevel@tonic-gate 114*7c478bd9Sstevel@tonic-gate /* ARGSUSED */ 115*7c478bd9Sstevel@tonic-gate int 116*7c478bd9Sstevel@tonic-gate wallprog_1_freeresult(SVCXPRT *transp, xdrproc_t proc, caddr_t arg) 117*7c478bd9Sstevel@tonic-gate { 118*7c478bd9Sstevel@tonic-gate return (TRUE); 119*7c478bd9Sstevel@tonic-gate } 120