2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1983, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)fingerd.c 8.1 (Berkeley) 6/4/93
35 * $FreeBSD: src/libexec/fingerd/fingerd.c,v 1.16.2.3 2002/04/03 09:05:23 mike Exp $
36 * $DragonFly: src/libexec/fingerd/fingerd.c,v 1.3 2003/11/14 03:54:29 dillon Exp $
39 #include <sys/types.h>
40 #include <sys/param.h>
41 #include <sys/socket.h>
42 #include <netinet/in.h>
43 #include <netinet/tcp.h>
44 #include <arpa/inet.h>
54 #include "pathnames.h"
56 void logerr (const char *, ...);
66 struct sockaddr_storage ss;
67 int p[2], logging, secure, sval;
69 char **ap, *av[ENTRIES + 1], **comp, line[1024], *prog;
70 char rhost[MAXHOSTNAMELEN];
74 openlog("fingerd", LOG_PID | LOG_CONS, LOG_DAEMON);
76 while ((ch = getopt(argc, argv, "slp:")) != -1)
89 logerr("illegal option -- %c", optopt);
93 * Enable server-side Transaction TCP.
97 if (setsockopt(STDOUT_FILENO, IPPROTO_TCP, TCP_NOPUSH, &one,
99 logerr("setsockopt(TCP_NOPUSH) failed: %m");
103 if (!fgets(line, sizeof(line), stdin))
110 end = memchr(line, 0, sizeof(line));
112 if ((t = malloc(sizeof(line) + 1)) == NULL)
113 logerr("malloc: %s", strerror(errno));
114 memcpy(t, line, sizeof(line));
117 if ((t = strdup(line)) == NULL)
118 logerr("strdup: %s", strerror(errno));
120 for (end = t; *end; end++)
121 if (*end == '\n' || *end == '\r')
124 if (getpeername(0, (struct sockaddr *)&ss, &sval) < 0)
125 logerr("getpeername: %s", strerror(errno));
126 realhostname_sa(rhost, sizeof rhost - 1,
127 (struct sockaddr *)&ss, sval);
128 rhost[sizeof(rhost) - 1] = '\0';
129 syslog(LOG_NOTICE, "query from %s: `%s'", rhost, t);
134 for (lp = line, ap = &av[3];;) {
135 *ap = strtok(lp, " \t\r\n");
137 if (secure && ap == &av[3]) {
138 puts("must provide username\r\n");
143 if (secure && strchr(*ap, '@')) {
144 puts("forwarding service denied\r\n");
148 /* RFC742: "/[Ww]" == "-l" */
149 if ((*ap)[0] == '/' && ((*ap)[1] == 'W' || (*ap)[1] == 'w')) {
153 else if (++ap == av + ENTRIES) {
160 if (lp = strrchr(prog, '/'))
165 logerr("pipe: %s", strerror(errno));
175 logerr("execv: %s: %s", prog, strerror(errno));
178 logerr("fork: %s", strerror(errno));
181 if (!(fp = fdopen(p[0], "r")))
182 logerr("fdopen: %s", strerror(errno));
183 while ((ch = getc(fp)) != EOF) {
199 logerr(const char *fmt, ...)
201 logerr(fmt, va_alist)
212 (void)vsyslog(LOG_ERR, fmt, ap);