1 files changed, 69 insertions, 0 deletions
diff --git a/libutil/login_tty.c b/libutil/login_tty.c
new file mode 100644
index 000000000..d354407f2
--- /dev/null
+++ b/libutil/login_tty.c
@@ -0,0 +1,69 @@
+/*-
+ * Copyright (c) 1990, 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.
+ * 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.
+ */
+
+/* Make FD be the controlling terminal, stdin, stdout, and stderr;
+   then close FD.  Returns 0 on success, nonzero on error.  */
+
+#include <sys/param.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <utmp.h>
+
+int login_tty(int fd)
+{
+	(void) setsid();
+#ifdef TIOCSCTTY
+	if (ioctl(fd, TIOCSCTTY, (char *)NULL) == -1)
+		return (-1);
+#else
+	{
+	  /* This might work.  */
+	  char *fdname = ttyname (fd);
+	  int newfd;
+	  if (fdname)
+	    {
+	      if (fd != 0)
+		(void) close (0);
+	      if (fd != 1)
+		(void) close (1);
+	      if (fd != 2)
+		(void) close (2);
+	      newfd = open (fdname, O_RDWR);
+	      (void) close (newfd);
+	    }
+	}
+#endif
+	(void) dup2(fd, 0);
+	(void) dup2(fd, 1);
+	(void) dup2(fd, 2);
+	if (fd > 2)
+		(void) close(fd);
+	return (0);
+}