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 #pragma ident "%Z%%M% %I% %E% SMI"
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 int
main(argc,argv)52 main(argc, argv)
53 int argc;
54 char *argv[];
55 {
56 char buf[LOGLEN], *ctoday, *logname, tmpbuf[MAXBASENAME+1];
57 FILE *fp;
58 time_t today;
59 extern char *ctime();
60 extern FILE *fopen();
61
62 if ( argc != 2 ) {
63 (void) fprintf(stderr, "USAGE: %s remotename\n", argv[0]);
64 exit(101);
65 }
66
67 if ( time(&today) != -1 ) {
68 ctoday = ctime(&today);
69 *(ctoday + strlen(ctoday) - 1) = '\0'; /* no ending \n */
70 } else
71 ctoday = "NO DATE";
72
73 logname = cuserid((char *) NULL);
74 (void) strncpy(tmpbuf, argv[1], MAXBASENAME);
75 tmpbuf[MAXBASENAME] = '\0';
76 (void) snprintf(buf, sizeof(buf), "%s: call from system %s login %s\n",
77 ctoday, tmpbuf, (logname == NULL ? "<unknown>" : logname));
78
79 errno = 0;
80 if ( (fp = fopen(FOREIGN, "a+")) == (FILE *)NULL )
81 fall_on_sword("cannot open", buf);
82 if ( fputs(buf, fp) == EOF )
83 fall_on_sword("cannot write", buf);
84 if ( fclose(fp) != 0 )
85 fall_on_sword("cannot close", buf);
86
87 return (0);
88 }
89
90 /* don't return from here */
91 void
fall_on_sword(errmsg,logmsg)92 fall_on_sword(errmsg, logmsg)
93 char *errmsg, *logmsg;
94 {
95 char ebuf[BUFSIZ+1];
96 int fds[2];
97 size_t sz;
98
99 (void) snprintf(ebuf, BUFSIZ,
100 "To: %s\nSubject: %s %s\n\n%s %s:\t%s (%d)\nlog msg:\t%s",
101 MAILTO, errmsg, FOREIGN, errmsg, FOREIGN,
102 strerror(errno), errno, logmsg);
103 sz = strlen(ebuf);
104 if (ebuf[sz-1] != '\n') {
105 ebuf[sz] = '\n';
106 ebuf[sz+1] = '\0';
107 }
108
109 /* reset to real uid. get a pipe. put error message on */
110 /* "write end" of pipe, close it. dup "read end" to */
111 /* stdin and then execl mail (which will read the error */
112 /* message we just wrote). */
113
114 if ( setuid(getuid()) == -1 || pipe(fds) != 0
115 || write(fds[1], ebuf, strlen(ebuf)) != strlen(ebuf)
116 || close(fds[1]) != 0 )
117 exit(errno);
118
119 if ( fds[0] != 0 ) {
120 close(0);
121 if ( dup(fds[0]) != 0 )
122 exit(errno);
123 }
124
125 execl("/usr/bin/mail", "mail", MAILTO, (char *) 0);
126 exit(errno); /* shouldn't get here */
127 }
128