1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23*0Sstevel@tonic-gate /* All Rights Reserved */ 24*0Sstevel@tonic-gate 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate /* 27*0Sstevel@tonic-gate * Copyright (c) 1998-1999 by Sun Microsystems, Inc. 28*0Sstevel@tonic-gate * All rights reserved. 29*0Sstevel@tonic-gate */ 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.4 */ 31*0Sstevel@tonic-gate /*LINTLIBRARY*/ 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate #include "synonyms.h" 34*0Sstevel@tonic-gate #include "libmail.h" 35*0Sstevel@tonic-gate #include <sys/types.h> 36*0Sstevel@tonic-gate #include <sys/stat.h> 37*0Sstevel@tonic-gate #include <fcntl.h> 38*0Sstevel@tonic-gate #include <utmpx.h> 39*0Sstevel@tonic-gate #include <syslog.h> 40*0Sstevel@tonic-gate #if !defined(__cplusplus) && !defined(c_plusplus) 41*0Sstevel@tonic-gate typedef void (*SIG_PF) (int); 42*0Sstevel@tonic-gate #endif 43*0Sstevel@tonic-gate #include <unistd.h> 44*0Sstevel@tonic-gate #include <signal.h> 45*0Sstevel@tonic-gate 46*0Sstevel@tonic-gate static SIG_PF catcher(void); 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate static SIG_PF catcher(void) 49*0Sstevel@tonic-gate { 50*0Sstevel@tonic-gate /* do nothing, but allow the write() to break */ 51*0Sstevel@tonic-gate return (0); 52*0Sstevel@tonic-gate } 53*0Sstevel@tonic-gate 54*0Sstevel@tonic-gate void 55*0Sstevel@tonic-gate notify(char *user, char *msg, int check_mesg_y, char *etcdir) 56*0Sstevel@tonic-gate { 57*0Sstevel@tonic-gate /* search the utmp file for this user */ 58*0Sstevel@tonic-gate SIG_PF old; 59*0Sstevel@tonic-gate unsigned int oldalarm; 60*0Sstevel@tonic-gate struct utmpx utmpx, *putmpx = &utmpx; 61*0Sstevel@tonic-gate 62*0Sstevel@tonic-gate setutxent(); 63*0Sstevel@tonic-gate 64*0Sstevel@tonic-gate /* grab the tty name */ 65*0Sstevel@tonic-gate while ((putmpx = getutxent()) != NULL) { 66*0Sstevel@tonic-gate if (strncmp(user, utmpx.ut_name, 67*0Sstevel@tonic-gate sizeof (utmpx.ut_name)) == 0) { 68*0Sstevel@tonic-gate char tty[sizeof (utmpx.ut_line)+1]; 69*0Sstevel@tonic-gate char dev[MAXFILENAME]; 70*0Sstevel@tonic-gate FILE *port; 71*0Sstevel@tonic-gate size_t i; 72*0Sstevel@tonic-gate int fd; 73*0Sstevel@tonic-gate 74*0Sstevel@tonic-gate for (i = 0; i < sizeof (utmpx.ut_line); i++) 75*0Sstevel@tonic-gate tty[i] = utmpx.ut_line[i]; 76*0Sstevel@tonic-gate tty[i] = '\0'; 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate /* stick /dev/ in front */ 79*0Sstevel@tonic-gate (void) sprintf(dev, "%s/dev/%s", etcdir, tty); 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate /* break out if write() to the tty hangs */ 82*0Sstevel@tonic-gate old = (SIG_PF)signal(SIGALRM, (SIG_PF)catcher); 83*0Sstevel@tonic-gate oldalarm = alarm(300); 84*0Sstevel@tonic-gate 85*0Sstevel@tonic-gate /* check if device is really a tty */ 86*0Sstevel@tonic-gate if ((fd = open(dev, O_WRONLY|O_NOCTTY)) == -1) { 87*0Sstevel@tonic-gate (void) fprintf(stderr, 88*0Sstevel@tonic-gate "Cannot open %s.\n", dev); 89*0Sstevel@tonic-gate continue; 90*0Sstevel@tonic-gate } else { 91*0Sstevel@tonic-gate if (!isatty(fd)) { 92*0Sstevel@tonic-gate (void) fprintf(stderr, "%s in utmpx is " 93*0Sstevel@tonic-gate "not a tty\n", tty); 94*0Sstevel@tonic-gate openlog("mail", 0, LOG_AUTH); 95*0Sstevel@tonic-gate syslog(LOG_CRIT, "%s in utmp is " 96*0Sstevel@tonic-gate "not a tty\n", tty); 97*0Sstevel@tonic-gate closelog(); 98*0Sstevel@tonic-gate (void) close(fd); 99*0Sstevel@tonic-gate continue; 100*0Sstevel@tonic-gate } 101*0Sstevel@tonic-gate } 102*0Sstevel@tonic-gate (void) close(fd); 103*0Sstevel@tonic-gate 104*0Sstevel@tonic-gate /* write to the tty */ 105*0Sstevel@tonic-gate port = fopen(dev, "w"); 106*0Sstevel@tonic-gate if (port != 0) { 107*0Sstevel@tonic-gate (void) fprintf(port, "\r\n%s\r\n", msg); 108*0Sstevel@tonic-gate (void) fclose(port); 109*0Sstevel@tonic-gate } 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate /* clean up our alarm */ 112*0Sstevel@tonic-gate (void) alarm(0); 113*0Sstevel@tonic-gate (void) signal(SIGALRM, old); 114*0Sstevel@tonic-gate (void) alarm(oldalarm); 115*0Sstevel@tonic-gate } 116*0Sstevel@tonic-gate } 117*0Sstevel@tonic-gate endutxent(); 118*0Sstevel@tonic-gate } 119