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 (c) 1999 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 31 #pragma ident "%Z%%M% %I% %E% SMI" /* from SVR4 bnu:unknown.c 1.8 */ 32 /* 33 * logs attempts by unknown remote machines to run uucico in FOREIGN 34 * ("/var/uucp/.Admin/Foreign"). if anything goes wrong, 35 * sends mail to login MAILTO ("uucp"). the executable should be 36 * placed in /usr/lib/uucp/remote.unknown, and should run setuid-uucp. 37 */ 38 39 #include <stdio.h> 40 #include <sys/types.h> 41 #include <time.h> 42 #include <errno.h> 43 #include "uucp.h" 44 45 #define FOREIGN "/var/uucp/.Admin/Foreign" 46 #define MAILTO "uucp" 47 #define LOGLEN 256 48 49 void fall_on_sword(); 50 51 main(argc, argv) 52 int argc; 53 char *argv[]; 54 { 55 char buf[LOGLEN], *ctoday, *logname, tmpbuf[MAXBASENAME+1]; 56 FILE *fp; 57 time_t today; 58 extern char *ctime(); 59 extern FILE *fopen(); 60 61 if ( argc != 2 ) { 62 (void) fprintf(stderr, "USAGE: %s remotename\n", argv[0]); 63 exit(101); 64 } 65 66 if ( time(&today) != -1 ) { 67 ctoday = ctime(&today); 68 *(ctoday + strlen(ctoday) - 1) = '\0'; /* no ending \n */ 69 } else 70 ctoday = "NO DATE"; 71 72 logname = cuserid((char *) NULL); 73 (void) strncpy(tmpbuf, argv[1], MAXBASENAME); 74 tmpbuf[MAXBASENAME] = '\0'; 75 (void) snprintf(buf, sizeof(buf), "%s: call from system %s login %s\n", 76 ctoday, tmpbuf, (logname == NULL ? "<unknown>" : logname)); 77 78 errno = 0; 79 if ( (fp = fopen(FOREIGN, "a+")) == (FILE *)NULL ) 80 fall_on_sword("cannot open", buf); 81 if ( fputs(buf, fp) == EOF ) 82 fall_on_sword("cannot write", buf); 83 if ( fclose(fp) != 0 ) 84 fall_on_sword("cannot close", buf); 85 86 exit(0); 87 88 /* NOTREACHED */ 89 } 90 91 /* don't return from here */ 92 void 93 fall_on_sword(errmsg, logmsg) 94 char *errmsg, *logmsg; 95 { 96 char ebuf[BUFSIZ+1]; 97 int fds[2]; 98 size_t sz; 99 extern int sys_nerr; 100 extern char *sys_errlist[]; 101 102 103 (void) snprintf(ebuf, BUFSIZ, 104 "To: %s\nSubject: %s %s\n\n%s %s:\t%s (%d)\nlog msg:\t%s", 105 MAILTO, errmsg, FOREIGN, errmsg, FOREIGN, 106 (errno < sys_nerr ? sys_errlist[errno] : "Unknown error "), 107 errno, logmsg); 108 sz = strlen(ebuf); 109 if (ebuf[sz-1] != '\n') { 110 ebuf[sz] = '\n'; 111 ebuf[sz+1] = '\0'; 112 } 113 114 /* reset to real uid. get a pipe. put error message on */ 115 /* "write end" of pipe, close it. dup "read end" to */ 116 /* stdin and then execl mail (which will read the error */ 117 /* message we just wrote). */ 118 119 if ( setuid(getuid()) == -1 || pipe(fds) != 0 120 || write(fds[1], ebuf, strlen(ebuf)) != strlen(ebuf) 121 || close(fds[1]) != 0 ) 122 exit(errno); 123 124 if ( fds[0] != 0 ) { 125 close(0); 126 if ( dup(fds[0]) != 0 ) 127 exit(errno); 128 } 129 130 execl("/usr/bin/mail", "mail", MAILTO, (char *) 0); 131 exit(errno); /* shouldn't get here */ 132 } 133