1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * logs attempts by unknown remote machines to run uucico in FOREIGN 32 * ("/var/uucp/.Admin/Foreign"). if anything goes wrong, 33 * sends mail to login MAILTO ("uucp"). the executable should be 34 * placed in /usr/lib/uucp/remote.unknown, and should run setuid-uucp. 35 */ 36 37 #include <stdio.h> 38 #include <sys/types.h> 39 #include <time.h> 40 #include <errno.h> 41 #include "uucp.h" 42 43 #define FOREIGN "/var/uucp/.Admin/Foreign" 44 #define MAILTO "uucp" 45 #define LOGLEN 256 46 47 void fall_on_sword(); 48 49 int 50 main(argc, argv) 51 int argc; 52 char *argv[]; 53 { 54 char buf[LOGLEN], *ctoday, *logname, tmpbuf[MAXBASENAME+1]; 55 FILE *fp; 56 time_t today; 57 extern char *ctime(); 58 extern FILE *fopen(); 59 60 if ( argc != 2 ) { 61 (void) fprintf(stderr, "USAGE: %s remotename\n", argv[0]); 62 exit(101); 63 } 64 65 if ( time(&today) != -1 ) { 66 ctoday = ctime(&today); 67 *(ctoday + strlen(ctoday) - 1) = '\0'; /* no ending \n */ 68 } else 69 ctoday = "NO DATE"; 70 71 logname = cuserid((char *) NULL); 72 (void) strncpy(tmpbuf, argv[1], MAXBASENAME); 73 tmpbuf[MAXBASENAME] = '\0'; 74 (void) snprintf(buf, sizeof(buf), "%s: call from system %s login %s\n", 75 ctoday, tmpbuf, (logname == NULL ? "<unknown>" : logname)); 76 77 errno = 0; 78 if ( (fp = fopen(FOREIGN, "a+")) == (FILE *)NULL ) 79 fall_on_sword("cannot open", buf); 80 if ( fputs(buf, fp) == EOF ) 81 fall_on_sword("cannot write", buf); 82 if ( fclose(fp) != 0 ) 83 fall_on_sword("cannot close", buf); 84 85 return (0); 86 } 87 88 /* don't return from here */ 89 void 90 fall_on_sword(errmsg, logmsg) 91 char *errmsg, *logmsg; 92 { 93 char ebuf[BUFSIZ+1]; 94 int fds[2]; 95 size_t sz; 96 97 (void) snprintf(ebuf, BUFSIZ, 98 "To: %s\nSubject: %s %s\n\n%s %s:\t%s (%d)\nlog msg:\t%s", 99 MAILTO, errmsg, FOREIGN, errmsg, FOREIGN, 100 strerror(errno), errno, logmsg); 101 sz = strlen(ebuf); 102 if (ebuf[sz-1] != '\n') { 103 ebuf[sz] = '\n'; 104 ebuf[sz+1] = '\0'; 105 } 106 107 /* reset to real uid. get a pipe. put error message on */ 108 /* "write end" of pipe, close it. dup "read end" to */ 109 /* stdin and then execl mail (which will read the error */ 110 /* message we just wrote). */ 111 112 if ( setuid(getuid()) == -1 || pipe(fds) != 0 113 || write(fds[1], ebuf, strlen(ebuf)) != strlen(ebuf) 114 || close(fds[1]) != 0 ) 115 exit(errno); 116 117 if ( fds[0] != 0 ) { 118 close(0); 119 if ( dup(fds[0]) != 0 ) 120 exit(errno); 121 } 122 123 execl("/usr/bin/mail", "mail", MAILTO, (char *) 0); 124 exit(errno); /* shouldn't get here */ 125 } 126