1 files changed, 111 insertions, 0 deletions
diff --git a/contrib/lukemftpd/src/logutmp.c b/contrib/lukemftpd/src/logutmp.c
new file mode 100644
index 0000000..7ef6437
--- /dev/null
+++ b/contrib/lukemftpd/src/logutmp.c
@@ -0,0 +1,111 @@
+/*
+ * Portions Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * Portions Copyright (c) 1996, Jason Downs.  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.
+ */
+
+#include "lukemftpd.h"
+
+typedef struct utmp UTMP;
+
+static int fd = -1;
+static int topslot = -1;
+
+/*
+ * Special versions of login()/logout() which hold the utmp file open,
+ * for use with ftpd.
+ */
+
+void
+login(const UTMP *ut)
+{
+	UTMP ubuf;
+
+	/*
+	 * First, loop through /etc/ttys, if needed, to initialize the
+	 * top of the tty slots, since ftpd has no tty.
+	 */
+	if (topslot < 0) {
+		topslot = 0;
+		while (getttyent() != (struct ttyent *)NULL)
+			topslot++;
+	}
+	if ((topslot < 0) || ((fd < 0)
+	    && (fd = open(_PATH_UTMP, O_RDWR|O_CREAT, 0644)) < 0))
+	    	return;
+
+	/*
+	 * Now find a slot that's not in use...
+	 */
+	(void)lseek(fd, (off_t)(topslot * sizeof(UTMP)), SEEK_SET);
+
+	while (1) {
+		if (read(fd, &ubuf, sizeof(UTMP)) == sizeof(UTMP)) {
+			if (!ubuf.ut_name[0]) {
+				(void)lseek(fd, -(off_t)sizeof(UTMP), SEEK_CUR);
+				break;
+			}
+			topslot++;
+		} else {
+			(void)lseek(fd, (off_t)(topslot * sizeof(UTMP)),
+			    SEEK_SET);
+			break;
+		}
+	}
+
+	(void)write(fd, ut, sizeof(UTMP));
+}
+
+int
+logout(const char *line)
+{
+	UTMP ut;
+	int rval;
+
+	rval = 0;
+	if (fd < 0)
+		return(rval);
+
+	(void)lseek(fd, 0, SEEK_SET);
+
+	while (read(fd, &ut, sizeof(UTMP)) == sizeof(UTMP)) {
+		if (!ut.ut_name[0]
+		    || strncmp(ut.ut_line, line, UT_LINESIZE))
+			continue;
+		memset(ut.ut_name, 0, UT_NAMESIZE);
+		memset(ut.ut_host, 0, UT_HOSTSIZE);
+		(void)time(&ut.ut_time);
+		(void)lseek(fd, -(off_t)sizeof(UTMP), SEEK_CUR);
+		(void)write(fd, &ut, sizeof(UTMP));
+		rval = 1;
+	}
+	return(rval);
+}