BSD 4.4 Lite Libexec Sources

4 files changed, 371 insertions, 0 deletions

diff --git a/libexec/fingerd/Makefile b/libexec/fingerd/Makefile
new file mode 100644
index 0000000..e2ed65c
--- /dev/null
+++ b/libexec/fingerd/Makefile
@@ -0,0 +1,6 @@
+#	@(#)Makefile	8.1 (Berkeley) 6/4/93
+
+PROG=	fingerd
+MAN8=	fingerd.0
+
+.include <bsd.prog.mk>
diff --git a/libexec/fingerd/fingerd.8 b/libexec/fingerd/fingerd.8
new file mode 100644
index 0000000..c5c0762
--- /dev/null
+++ b/libexec/fingerd/fingerd.8
@@ -0,0 +1,139 @@
+.\" Copyright (c) 1980, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)fingerd.8	8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt FINGERD 8
+.Os BSD 4.3
+.Sh NAME
+.Nm fingerd
+.Nd remote user information server
+.Sh SYNOPSIS
+.Nm fingerd
+.Op Fl s
+.Op Fl l
+.Op Fl p Ar filename
+.Sh DESCRIPTION
+.Nm Fingerd
+is a simple protocol based on
+.%T RFC1196
+that provides an interface to the
+Name and Finger programs at several network sites.
+The program is supposed to return a friendly,
+human-oriented status report on either the system at the moment
+or a particular person in depth.
+There is no required format and the
+protocol consists mostly of specifying a single
+.Dq command line .
+.Pp
+.Nm Fingerd
+listens for
+.Tn TCP
+requests at port 79.
+Once connected it reads a single command line
+terminated by a
+.Aq Tn CRLF
+which is passed to
+.Xr finger 1 .
+.Nm Fingerd
+closes its connections as soon as the output is finished.
+.Pp
+If the line is null (i.e. just a
+.Aq Tn CRLF
+is sent) then 
+.Xr finger
+returns a
+.Dq default
+report that lists all people logged into
+the system at that moment.
+.Pp
+If a user name is specified (e.g.
+.Pf eric Aq Tn CRLF )
+then the
+response lists more extended information for only that particular user,
+whether logged in or not.
+Allowable
+.Dq names
+in the command line include both
+.Dq login names
+and
+.Dq user names .
+If a name is ambiguous, all possible derivations are returned.
+.Pp
+The following options may be passed to
+.Nm fingerd
+as server program arguments in
+.Pa /etc/inetd.conf :
+.Bl -tag -width Ds
+.It Fl s
+Enable secure mode.
+Queries without a user name are rejected and
+forwarding of queries to other remote hosts is denied.
+.It Fl l
+Enable logging.
+The name of the host originating the query is reported via
+.Xr syslog 3
+at LOG_NOTICE priority.
+.It Fl p
+Use an alternate program as the local information provider.
+The default local program
+executed by
+.Nm fingerd
+is 
+.Xr finger 1 .
+By specifying a customized local server,
+this option allows a system manager
+to have more control over what information is
+provided to remote sites.
+.El
+.Sh SEE ALSO
+.Xr finger 1
+.Sh BUGS
+Connecting directly to the server from a
+.Tn TIP
+or an equally narrow-minded
+.Tn TELNET Ns \-protocol
+user program can result
+in meaningless attempts at option negotiation being sent to the
+server, which will foul up the command line interpretation.
+.Nm Fingerd
+should be taught to filter out
+.Tn IAC Ns \'s
+and perhaps even respond
+negatively
+.Pq Tn IAC WON'T
+to all option commands received.
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 4.3 .
diff --git a/libexec/fingerd/fingerd.c b/libexec/fingerd/fingerd.c
new file mode 100644
index 0000000..74173a9
--- /dev/null
+++ b/libexec/fingerd/fingerd.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright (c) 1983, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1983, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)fingerd.c	8.1 (Berkeley) 6/4/93";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <errno.h>
+
+#include <unistd.h>
+#include <syslog.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include "pathnames.h"
+
+void err __P((const char *, ...));
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	register FILE *fp;
+	register int ch;
+	register char *lp;
+	struct hostent *hp;
+	struct sockaddr_in sin;
+	int p[2], logging, secure, sval;
+#define	ENTRIES	50
+	char **ap, *av[ENTRIES + 1], **comp, line[1024], *prog;
+
+	prog = _PATH_FINGER;
+	logging = secure = 0;
+	openlog("fingerd", LOG_PID | LOG_CONS, LOG_DAEMON);
+	opterr = 0;
+	while ((ch = getopt(argc, argv, "slp:")) != EOF)
+		switch (ch) {
+		case 'l':
+			logging = 1;
+			break;
+		case 'p':
+			prog = optarg;
+			break;
+		case 's':
+			secure = 1;
+			break;
+		case '?':
+		default:
+			err("illegal option -- %c", ch);
+		}
+
+	if (logging) {
+		sval = sizeof(sin);
+		if (getpeername(0, (struct sockaddr *)&sin, &sval) < 0)
+			err("getpeername: %s", strerror(errno));
+		if (hp = gethostbyaddr((char *)&sin.sin_addr.s_addr,
+		    sizeof(sin.sin_addr.s_addr), AF_INET))
+			lp = hp->h_name;
+		else
+			lp = inet_ntoa(sin.sin_addr);
+		syslog(LOG_NOTICE, "query from %s", lp);
+	}
+
+	if (!fgets(line, sizeof(line), stdin))
+		exit(1);
+	
+	comp = &av[1];
+	for (lp = line, ap = &av[2];;) {
+		*ap = strtok(lp, " \t\r\n");
+		if (!*ap) {
+			if (secure && ap == &av[2]) {
+				puts("must provide username\r\n");
+				exit(1);
+			}
+			break;
+		}
+		if (secure && strchr(*ap, '@')) {
+			puts("fowarding service denied\r\n");
+			exit(1);
+		}
+
+		/* RFC742: "/[Ww]" == "-l" */
+		if ((*ap)[0] == '/' && ((*ap)[1] == 'W' || (*ap)[1] == 'w')) {
+			av[1] = "-l";
+			comp = &av[0];
+		}
+		else if (++ap == av + ENTRIES)
+			break;
+		lp = NULL;
+	}
+
+	if (lp = strrchr(prog, '/'))
+		*comp = ++lp;
+	else
+		*comp = prog;
+	if (pipe(p) < 0)
+		err("pipe: %s", strerror(errno));
+
+	switch(vfork()) {
+	case 0:
+		(void)close(p[0]);
+		if (p[1] != 1) {
+			(void)dup2(p[1], 1);
+			(void)close(p[1]);
+		}
+		execv(prog, comp);
+		err("execv: %s: %s", prog, strerror(errno));
+		_exit(1);
+	case -1:
+		err("fork: %s", strerror(errno));
+	}
+	(void)close(p[1]);
+	if (!(fp = fdopen(p[0], "r")))
+		err("fdopen: %s", strerror(errno));
+	while ((ch = getc(fp)) != EOF) {
+		if (ch == '\n')
+			putchar('\r');
+		putchar(ch);
+	}
+	exit(0);
+}
+
+#if __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+void
+#if __STDC__
+err(const char *fmt, ...)
+#else
+err(fmt, va_alist)
+	char *fmt;
+        va_dcl
+#endif
+{
+	va_list ap;
+#if __STDC__
+	va_start(ap, fmt);
+#else
+	va_start(ap);
+#endif
+	(void)vsyslog(LOG_ERR, fmt, ap);
+	va_end(ap);
+	exit(1);
+	/* NOTREACHED */
+}
diff --git a/libexec/fingerd/pathnames.h b/libexec/fingerd/pathnames.h
new file mode 100644
index 0000000..864a8f6
--- /dev/null
+++ b/libexec/fingerd/pathnames.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)pathnames.h	8.1 (Berkeley) 6/4/93
+ */
+
+#define	_PATH_FINGER	"/usr/bin/finger"