BSD 4.4 Lite Libexec Sources

1 files changed, 190 insertions, 0 deletions

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 */
+}