From fb913b19be6ad0e6eef4ee828ec3f3e27d33c05d Mon Sep 17 00:00:00 2001
From: Ingo Weinhold <ingo_weinhold@gmx.de>
Date: Thu, 24 Apr 2008 21:29:13 +0000
Subject: [PATCH] Added POSIX functions posix_openpt(), grantpt(), ptsname(),
 and unlockpt(), which provide a portable way of opening a pty.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25134 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 headers/posix/stdlib.h                  |  7 ++++
 src/system/libroot/posix/stdlib/Jamfile |  3 +-
 src/system/libroot/posix/stdlib/pty.cpp | 52 +++++++++++++++++++++++++
 3 files changed, 61 insertions(+), 1 deletion(-)
 create mode 100644 src/system/libroot/posix/stdlib/pty.cpp

diff --git a/headers/posix/stdlib.h b/headers/posix/stdlib.h
index 74962b5fc1..1aecc1eed0 100644
--- a/headers/posix/stdlib.h
+++ b/headers/posix/stdlib.h
@@ -166,6 +166,13 @@ extern size_t	wcstombs(char *string, const wchar_t *pwcs, size_t maxSize);
 /* crypt */
 extern void 	setkey(const char *key);	
 
+
+/* pty functions */
+extern int		posix_openpt(int openFlags);
+extern int		grantpt(int masterFD);
+extern char*	ptsname(int masterFD);
+extern int		unlockpt(int masterFD);
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
diff --git a/src/system/libroot/posix/stdlib/Jamfile b/src/system/libroot/posix/stdlib/Jamfile
index 7ae28698c6..023ae69c5c 100644
--- a/src/system/libroot/posix/stdlib/Jamfile
+++ b/src/system/libroot/posix/stdlib/Jamfile
@@ -1,6 +1,6 @@
 SubDir HAIKU_TOP src system libroot posix stdlib ;
 
-UsePrivateHeaders libroot ;
+UsePrivateHeaders drivers libroot ;
 UseHeaders $(TARGET_PRIVATE_KERNEL_HEADERS) : true ;
 
 MergeObject posix_stdlib.o :
@@ -15,6 +15,7 @@ MergeObject posix_stdlib.o :
 	heapsort.c 
 	merge.c
 	mktemp.c
+	pty.cpp
 	qsort.c 
 	radixsort.c 
 	rand.c 
diff --git a/src/system/libroot/posix/stdlib/pty.cpp b/src/system/libroot/posix/stdlib/pty.cpp
new file mode 100644
index 0000000000..2da52c50d6
--- /dev/null
+++ b/src/system/libroot/posix/stdlib/pty.cpp
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2008, Ingo Weinhold, ingo_weinhold@gmx.de. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+#include <stdlib.h>
+
+#include <fcntl.h>
+#include <stdio.h>
+
+#include <SupportDefs.h>
+
+#include <tty.h>
+
+
+int
+posix_openpt(int openFlags)
+{
+	return open("/dev/ptmx", openFlags);
+}
+
+
+int
+grantpt(int masterFD)
+{
+	return ioctl(masterFD, B_IOCTL_GRANT_TTY);
+}
+
+
+char*
+ptsname(int masterFD)
+{
+	int32 index;
+	if (ioctl(masterFD, B_IOCTL_GET_TTY_INDEX, &index, sizeof(index)) < 0)
+		return NULL;
+
+	static char buffer[32];
+	
+	char letter = 'p';
+	snprintf(buffer, sizeof(buffer), "/dev/tt/%c%lx", char(letter + index / 16),
+		index % 16);
+
+	return buffer;
+}
+
+
+int
+unlockpt(int masterFD)
+{
+	// Noting to do ATM.
+	return 0;
+}