From dbc6c8c6637eb7e3c83c6f4cd2446000b46e28bf Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Thu, 21 Mar 2013 21:35:51 +0100
Subject: [PATCH] Add ioctl(2).

---
 libc/Makefile                      |  1 +
 libc/include/sys/ioctl.h           | 36 +++++++++++++++++++++++++++
 libc/ioctl.cpp                     | 39 ++++++++++++++++++++++++++++++
 sortix/include/sortix/syscallnum.h |  5 ++--
 sortix/io.cpp                      | 16 ++++++++++++
 5 files changed, 95 insertions(+), 2 deletions(-)
 create mode 100644 libc/include/sys/ioctl.h
 create mode 100644 libc/ioctl.cpp

diff --git a/libc/Makefile b/libc/Makefile
index 92941640..def7844d 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -198,6 +198,7 @@ gettermmode.o \
 gettimeofday.o \
 getuid.o \
 init.o \
+ioctl.o \
 ioleast.o \
 isatty.o \
 kernelinfo.o \
diff --git a/libc/include/sys/ioctl.h b/libc/include/sys/ioctl.h
new file mode 100644
index 00000000..bf6a9049
--- /dev/null
+++ b/libc/include/sys/ioctl.h
@@ -0,0 +1,36 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+    This file is part of the Sortix C Library.
+
+    The Sortix C Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or (at your
+    option) any later version.
+
+    The Sortix C Library is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
+
+    sys/ioctl.h
+    Miscellaneous device control interface.
+
+*******************************************************************************/
+
+#ifndef INCLUDE_SYS_IOCTL_H
+#define INCLUDE_SYS_IOCTL_H
+
+#include <features.h>
+
+__BEGIN_DECLS
+
+int ioctl(int fd, int request, ...);
+
+__END_DECLS
+
+#endif
diff --git a/libc/ioctl.cpp b/libc/ioctl.cpp
new file mode 100644
index 00000000..2f554cfe
--- /dev/null
+++ b/libc/ioctl.cpp
@@ -0,0 +1,39 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+    This file is part of the Sortix C Library.
+
+    The Sortix C Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or (at your
+    option) any later version.
+
+    The Sortix C Library is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
+
+    ioctl.cpp
+    Miscellaneous device control interface.
+
+*******************************************************************************/
+
+#include <sys/ioctl.h>
+#include <sys/syscall.h>
+
+#include <stdarg.h>
+
+DEFN_SYSCALL3(int, sys_ioctl, SYSCALL_IOCTL, int, int, void*);
+
+extern "C" int ioctl(int fd, int request, ...)
+{
+	va_list ap;
+	va_start(ap, request);
+	void* ptr = va_arg(ap, void*);
+	va_end(ap);
+	return sys_ioctl(fd, request, ptr);
+}
diff --git a/sortix/include/sortix/syscallnum.h b/sortix/include/sortix/syscallnum.h
index 5871a162..494003d8 100644
--- a/sortix/include/sortix/syscallnum.h
+++ b/sortix/include/sortix/syscallnum.h
@@ -1,6 +1,6 @@
 /*******************************************************************************
 
-    Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
+    Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
 
     This file is part of Sortix.
 
@@ -105,6 +105,7 @@
 #define SYSCALL_GETEGID 81
 #define SYSCALL_SETEUID 82
 #define SYSCALL_SETEGID 83
-#define SYSCALL_MAX_NUM 84 /* index of highest constant + 1 */
+#define SYSCALL_IOCTL 84
+#define SYSCALL_MAX_NUM 85 /* index of highest constant + 1 */
 
 #endif
diff --git a/sortix/io.cpp b/sortix/io.cpp
index 84aef4fc..cd1e50ba 100644
--- a/sortix/io.cpp
+++ b/sortix/io.cpp
@@ -325,6 +325,21 @@ static int sys_fcntl(int fd, int cmd, unsigned long arg)
 	return ret;
 }
 
+static int sys_ioctl(int fd, int cmd, void* /*ptr*/)
+{
+	Ref<Descriptor> desc = CurrentProcess()->GetDescriptor(fd);
+	if ( !desc )
+		return -1;
+	int ret = -1;
+	switch ( cmd )
+	{
+	default:
+		errno = EINVAL;
+		break;
+	}
+	return ret;
+}
+
 static ssize_t sys_readdirents(int fd, kernel_dirent* dirent, size_t size/*,
                                size_t maxcount*/)
 {
@@ -594,6 +609,7 @@ void Init()
 	Syscall::Register(SYSCALL_FSYNC, (void*) sys_fsync);
 	Syscall::Register(SYSCALL_FTRUNCATE, (void*) sys_ftruncate);
 	Syscall::Register(SYSCALL_GETTERMMODE, (void*) sys_gettermmode);
+	Syscall::Register(SYSCALL_IOCTL, (void*) sys_ioctl);
 	Syscall::Register(SYSCALL_ISATTY, (void*) sys_isatty);
 	Syscall::Register(SYSCALL_LINKAT, (void*) sys_linkat);
 	Syscall::Register(SYSCALL_LINK, (void*) sys_link);