From 015e01ffd34335e7232c4b6e039f18f39358f74c Mon Sep 17 00:00:00 2001
From: John Hodge <tpg@mutabah.net>
Date: Wed, 15 May 2013 16:11:34 +0800
Subject: [PATCH] Usermode/libposix - fcntl and debug

---
 .../ld-acess.so_src/include_exp/acess/sys.h   |  1 +
 Usermode/Libraries/libposix.so_src/Makefile   |  1 +
 Usermode/Libraries/libposix.so_src/fcntl.c    | 59 +++++++++++++++++++
 .../libposix.so_src/include_exp/fcntl.h       |  6 +-
 Usermode/Libraries/libposix.so_src/unistd.c   |  2 +
 5 files changed, 66 insertions(+), 3 deletions(-)
 create mode 100644 Usermode/Libraries/libposix.so_src/fcntl.c

diff --git a/Usermode/Libraries/ld-acess.so_src/include_exp/acess/sys.h b/Usermode/Libraries/ld-acess.so_src/include_exp/acess/sys.h
index d45ffb64..bcd3d1fa 100644
--- a/Usermode/Libraries/ld-acess.so_src/include_exp/acess/sys.h
+++ b/Usermode/Libraries/ld-acess.so_src/include_exp/acess/sys.h
@@ -25,6 +25,7 @@
 #define OPENFLAG_APPEND	0x20
 #define	OPENFLAG_NOLINK	0x40
 #define	OPENFLAG_CREATE	0x80
+#define OPENFLAG_NONBLOCK	0x100	// How would this work?
 #ifndef SEEK_CUR
 # define SEEK_SET	1
 # define SEEK_CUR	0
diff --git a/Usermode/Libraries/libposix.so_src/Makefile b/Usermode/Libraries/libposix.so_src/Makefile
index 20b5fec4..6e666e8c 100644
--- a/Usermode/Libraries/libposix.so_src/Makefile
+++ b/Usermode/Libraries/libposix.so_src/Makefile
@@ -10,6 +10,7 @@ LDFLAGS  += -soname libposix.so -Map map.txt -lc
 
 OBJ  = main.o unistd.o dirent.o stat.o utmpx.o termios.o
 OBJ += pwd.o syslog.o sys_time.o sys_ioctl.o sys_resource.o
+OBJ += fcntl.o
 DEPFILES := $(OBJ:%.o=%.d)
 BIN = libposix.so
 
diff --git a/Usermode/Libraries/libposix.so_src/fcntl.c b/Usermode/Libraries/libposix.so_src/fcntl.c
new file mode 100644
index 00000000..d57bca50
--- /dev/null
+++ b/Usermode/Libraries/libposix.so_src/fcntl.c
@@ -0,0 +1,59 @@
+/*
+ * Acess2 POSIX Emulation Library
+ * - By John Hodge (thePowersGang)
+ *
+ * fcntl.c
+ * - File descriptor control
+ */
+#include <sys/types.h>	// off_t
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <acess/sys.h>
+#include <errno.h>
+
+// === CODE ===
+int fcntl(int fd, int cmd, ...)
+{
+	 int	ret;
+	va_list	args;
+	va_start(args, cmd);
+	
+	switch(cmd)
+	{
+	case F_GETFL: {
+		 int	a_flags = _SysFDFlags(fd, 0, 0);
+		if( a_flags == -1 )
+			return -1;
+		ret = 0;
+		if(a_flags & OPENFLAG_READ)	ret |= O_RDONLY;
+		if(a_flags & OPENFLAG_WRITE)	ret |= O_WRONLY;
+		if(a_flags & OPENFLAG_NONBLOCK)	ret |= O_NONBLOCK;
+		if(a_flags & OPENFLAG_APPEND) 	ret |= O_APPEND;
+		// TODO: Extra flags for F_GETFL
+		break; }
+	case F_SETFL: {
+		long	p_flags = va_arg(args, long);
+		 int	a_flags = 0;
+		const int	mask = OPENFLAG_NONBLOCK|OPENFLAG_APPEND;
+		
+		if(p_flags & O_NONBLOCK)
+			a_flags |= OPENFLAG_NONBLOCK;
+		if(p_flags & O_APPEND)
+			a_flags |= OPENFLAG_APPEND;
+		// TODO: Extra flags for F_SETFL
+
+		ret = _SysFDFlags(fd, mask, a_flags);
+		if(ret != -1)
+			ret = 0;
+
+		break; }
+	default:
+		_SysDebug("fcntl(%i) unknown or unimplimented", cmd);
+		errno = EINVAL;
+		ret = -1;
+		break;
+	}
+	va_end(args);
+	return ret;
+}
diff --git a/Usermode/Libraries/libposix.so_src/include_exp/fcntl.h b/Usermode/Libraries/libposix.so_src/include_exp/fcntl.h
index bdb54226..f53ad935 100644
--- a/Usermode/Libraries/libposix.so_src/include_exp/fcntl.h
+++ b/Usermode/Libraries/libposix.so_src/include_exp/fcntl.h
@@ -1,9 +1,9 @@
 /*
- * Acess2 C Library (UNIX Emulation)
+ * Acess2 POSIX Emulation Library
  * - By John Hodge (thePowersGang)
  *
  * fcntl.h
- * - ??
+ * - File descriptor control?
  */
 
 #ifndef _FCNTL_H_
@@ -32,7 +32,7 @@ enum e_fcntl_cmds
 	F_GETLK,	// (struct flock *)
 };
 
-static inline int fcntl(int fd __attribute__((unused)), int cmd __attribute__((unused)), ...) { return -1; }
+extern int fcntl(int fd, int cmd, ...);
 
 #endif
 
diff --git a/Usermode/Libraries/libposix.so_src/unistd.c b/Usermode/Libraries/libposix.so_src/unistd.c
index 57d71258..5f974404 100644
--- a/Usermode/Libraries/libposix.so_src/unistd.c
+++ b/Usermode/Libraries/libposix.so_src/unistd.c
@@ -89,6 +89,7 @@ int execv(const char *b, char *v[])
 
 int dup(int oldfd)
 {
+	_SysDebug("libposix: dup() does not share offsets/flags");
 	// NOTE: Acess's CopyFD doesn't cause offset sharing
 	// TODO: Check that -1 does cause a new allocation
 	return _SysCopyFD(oldfd, -1);
@@ -96,6 +97,7 @@ int dup(int oldfd)
 
 int dup2(int oldfd, int newfd)
 {
+	_SysDebug("libposix: dup2() does not share offsets/flags");
 	// NOTE: Acess's CopyFD doesn't cause offset sharing
 	return _SysCopyFD(oldfd, newfd);
 }
-- 
2.20.1