1 files changed, 117 insertions, 0 deletions
diff --git a/lib/libutil/pty.c b/lib/libutil/pty.c
new file mode 100644
index 0000000..7e06408
--- /dev/null
+++ b/lib/libutil/pty.c
@@ -0,0 +1,117 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ *	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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)pty.c	8.3 (Berkeley) 5/16/94";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <grp.h>
+#include <libutil.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+
+int
+openpty(int *amaster, int *aslave, char *name, struct termios *termp,
+    struct winsize *winp)
+{
+	const char *slavename;
+	int master, slave;
+
+	master = posix_openpt(O_RDWR|O_NOCTTY);
+	if (master == -1)
+		return (-1);
+
+	if (grantpt(master) == -1)
+		goto bad;
+
+	if (unlockpt(master) == -1)
+		goto bad;
+
+	slavename = ptsname(master);
+	if (slavename == NULL)
+		goto bad;
+
+	slave = open(slavename, O_RDWR);
+	if (slave == -1)
+		goto bad;
+
+	*amaster = master;
+	*aslave = slave;
+
+	if (name)
+		strcpy(name, slavename);
+	if (termp)
+		tcsetattr(slave, TCSAFLUSH, termp);
+	if (winp)
+		ioctl(slave, TIOCSWINSZ, (char *)winp);
+
+	return (0);
+
+bad:	close(master);
+	return (-1);
+}
+
+int
+forkpty(int *amaster, char *name, struct termios *termp, struct winsize *winp)
+{
+	int master, slave, pid;
+
+	if (openpty(&master, &slave, name, termp, winp) == -1)
+		return (-1);
+	switch (pid = fork()) {
+	case -1:
+		return (-1);
+	case 0:
+		/*
+		 * child
+		 */
+		(void) close(master);
+		login_tty(slave);
+		return (0);
+	}
+	/*
+	 * parent
+	 */
+	*amaster = master;
+	(void) close(slave);
+	return (pid);
+}