Usermode - Renamed VFS syscalls to _Sys* to remove POSIX collisions

[tpg/acess2.git] / Usermode / Libraries / libposix.so_src / unistd.c

diff --git a/Usermode/Libraries/libposix.so_src/unistd.c b/Usermode/Libraries/libposix.so_src/unistd.c
new file mode 100644 (file)
index 0000000..1a5b7be
--- /dev/null
+++ b/Usermode/Libraries/libposix.so_src/unistd.c
@@ -0,0 +1,71 @@
+/*
+ * Acess2 POSIX Emulation Layer
+ * - By John Hodge
+ * 
+ * unistd.c
+ * - POSIX->Acess VFS call translation
+ */
+#include <unistd.h>
+#include <acess/sys.h>
+#include <stdarg.h>
+
+// === CODE ===
+int open(const char *path, int openmode, ...)
+{
+       mode_t  create_mode = 0;
+       int openflags = 0;
+       
+       switch( openmode & O_RDWR )
+       {
+       case 0: // Special
+               break;
+       case O_RDONLY:  openflags |= OPENFLAG_READ;     break;
+       case O_WRONLY:  openflags |= OPENFLAG_WRITE;    break;
+       case O_RDWR:    openflags |= OPENFLAG_READ|OPENFLAG_WRITE;      break;
+       }
+       
+       if( openmode & O_CREAT ) {
+               openflags |= OPENFLAG_CREATE;
+               va_list args;
+               va_start(args, openmode);
+               create_mode = va_arg(args, mode_t);
+               va_end(args);
+       }
+       
+       return _SysOpen(path, openflags, create_mode);
+}
+
+int creat(const char *path, mode_t mode)
+{
+       // TODO: Make native call to do this cheaper
+       int fd = _SysOpen(path, OPENFLAG_CREATE, mode);
+       if( fd == -1 )  return -1;
+       _SysClose(fd);
+       return 0;
+}
+
+int close(int fd)
+{
+       _SysClose(fd);
+       return 0;
+}
+
+ssize_t        write(int fd, const void *buf, size_t count)
+{
+       return _SysWrite(fd, buf, count);
+}
+
+ssize_t        read(int fd, void *buf, size_t count)
+{
+       return _SysRead(fd, buf, count);
+}
+
+int fork(void)
+{
+       return clone(CLONE_VM, 0);
+}
+
+int execv(const char *b, char *v[])
+{
+       return execve(b, v, NULL);
+}