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-rw-r--r--libutil/login_tty.c69
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diff --git a/libutil/login_tty.c b/libutil/login_tty.c
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+++ b/libutil/login_tty.c
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+/*-
+ * 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);
+}