Add a libutempter compatibility interface to libulog.

The ulog_login_pseudo(3) and ulog_logout_pseudo(3) interfaces provide a
functionality identical to what libutempter has to offer. Just transform
libutempter's calls into the before mentioned functions.

libutempter doesn't work with utmpx, so instead of fixing I thought the
easiest way would be to integrate this functionality. libutempter is
used by applications like xterm and the KDE libraries, so if I ever
change the underlying file format, these applications will keep working
automatically.

Also increase __FreeBSD_version to indicate the addition (as well as the
import of libulog).

1 files changed, 84 insertions, 0 deletions

diff --git a/lib/libulog/utempter.c b/lib/libulog/utempter.c
new file mode 100644
index 0000000..bb0eb2b
--- /dev/null
+++ b/lib/libulog/utempter.c
@@ -0,0 +1,84 @@
+/*-
+ * Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "ulog_internal.h"
+#include "utempter.h"
+
+static int last_fd = -1;
+
+int
+utempter_add_record(int fd, const char *host)
+{
+
+	ulog_login_pseudo(fd, host);
+	last_fd = fd;
+	return (0);
+}
+
+int
+utempter_remove_added_record(void)
+{
+
+	if (last_fd < 0)
+		return (0);
+	ulog_logout_pseudo(last_fd);
+	last_fd = -1;
+	return (0);
+}
+
+int
+utempter_remove_record(int fd)
+{
+
+	ulog_logout_pseudo(fd);
+	if (last_fd == fd)
+		last_fd = -1;
+	return (0);
+}
+
+void
+addToUtmp(const char *pty __unused, const char *host, int fd)
+{
+
+	utempter_add_record(fd, host);
+}
+
+void
+removeFromUtmp(void)
+{
+
+	utempter_remove_added_record();
+}
+
+void
+removeLineFromUtmp(const char *pty __unused, int fd)
+{
+
+	utempter_remove_record(fd);
+}