1 files changed, 83 insertions, 0 deletions

diff --git a/bsd-login.c b/bsd-login.c
new file mode 100644
index 000000000..8c84272f8
--- /dev/null
+++ b/bsd-login.c
@@ -0,0 +1,83 @@
+/*      $OpenBSD: login.c,v 1.5 1998/07/13 02:11:12 millert Exp $       */
+/*
+ * Copyright (c) 1988, 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.
+ */
+
+#include "config.h"
+#ifndef HAVE_LOGIN
+
+#if defined(LIBC_SCCS) && !defined(lint)
+/* from: static char sccsid[] = "@(#)login.c    8.1 (Berkeley) 6/4/93"; */
+static char *rcsid = "$Id: bsd-login.c,v 1.1 1999/11/19 04:32:34 damien Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <utmp.h>
+#include <stdio.h>
+
+void
+login(utp)
+        struct utmp *utp;
+{
+        struct utmp old_ut;
+        register int fd;
+        int tty;
+
+        tty = ttyslot();
+        if (tty > 0 && (fd = open(_PATH_UTMP, O_RDWR|O_CREAT, 0644)) >= 0) {
+                (void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET);
+                /*
+                 * Prevent luser from zero'ing out ut_host.
+                 * If the new ut_line is empty but the old one is not
+                 * and ut_line and ut_name match, preserve the old ut_line.
+                 */
+                if (read(fd, &old_ut, sizeof(struct utmp)) ==
+                    sizeof(struct utmp) && utp->ut_host[0] == '\0' &&
+                    old_ut.ut_host[0] != '\0' &&
+                    strncmp(old_ut.ut_line, utp->ut_line, UT_LINESIZE) == 0 &&
+                    strncmp(old_ut.ut_name, utp->ut_name, UT_NAMESIZE) == 0)
+                        (void)memcpy(utp->ut_host, old_ut.ut_host, UT_HOSTSIZE);
+                (void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET);
+                (void)write(fd, utp, sizeof(struct utmp));
+                (void)close(fd);
+        }
+        if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) >= 0) {
+                (void)write(fd, utp, sizeof(struct utmp));
+                (void)close(fd);
+        }
+}
+
+#endif /* HAVE_LOGIN */