From 1ed6a33cc56aee0a470aec2a822dbd2f81a5a071 Mon Sep 17 00:00:00 2001
From: Ingo Weinhold <ingo_weinhold@gmx.de>
Date: Sun, 30 Mar 2008 16:03:19 +0000
Subject: [PATCH] Also publish /dev/tty. Opening it will open the controlling
 tty for the current process.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24681 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/add-ons/kernel/drivers/tty/driver.cpp |  7 +++++--
 src/add-ons/kernel/drivers/tty/slave.cpp  | 13 +++++++++++--
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/src/add-ons/kernel/drivers/tty/driver.cpp b/src/add-ons/kernel/drivers/tty/driver.cpp
index 8344ecf2d4..9fb643b679 100644
--- a/src/add-ons/kernel/drivers/tty/driver.cpp
+++ b/src/add-ons/kernel/drivers/tty/driver.cpp
@@ -27,8 +27,9 @@ static const int kMaxCachedSemaphores = 8;
 
 int32 api_version = B_CUR_DRIVER_API_VERSION;
 
-static char *sDeviceNames[kNumTTYs * 2 + 1];
-	// reserve space for "pt/" and "tt/" entries and the terminating NULL
+static char *sDeviceNames[kNumTTYs * 2 + 2];
+	// reserve space for "pt/" and "tt/" entries, "tty", and the terminating
+	// NULL
 
 struct mutex gGlobalTTYLock;
 struct mutex gTTYCookieLock;
@@ -100,6 +101,8 @@ init_driver(void)
 		}
 	}
 
+	sDeviceNames[2 * kNumTTYs] = "tty";
+
 	tty_add_debugger_commands();
 
 	return B_OK;
diff --git a/src/add-ons/kernel/drivers/tty/slave.cpp b/src/add-ons/kernel/drivers/tty/slave.cpp
index e1cddb292d..5cc3f42e8a 100644
--- a/src/add-ons/kernel/drivers/tty/slave.cpp
+++ b/src/add-ons/kernel/drivers/tty/slave.cpp
@@ -31,9 +31,18 @@ struct tty gSlaveTTYs[kNumTTYs];
 static status_t
 slave_open(const char *name, uint32 flags, void **_cookie)
 {
+	// Get the tty index: Opening "/dev/tty" means opening the process'
+	// controlling tty.
 	int32 index = get_tty_index(name);
-	if (index >= (int32)kNumTTYs)
-		return B_ERROR;
+	if (strcmp(name, "tty") == 0) {
+		index = team_get_controlling_tty();
+		if (index < 0)
+			return B_NOT_ALLOWED;
+	} else {
+		index = get_tty_index(name);
+		if (index >= (int32)kNumTTYs)
+			return B_ERROR;
+	}
 
 	TRACE(("slave_open: TTY index = %ld (name = %s)\n", index, name));