Initial commit

tasks/libposix/open.c

@@ -0,0 +1,51 @@
+/*
+ * l4/posix glue for open()
+ *
+ * Copyright (C) 2007 Bahadir Balban
+ */
+#include <errno.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <sys/shm.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <l4lib/arch/syscalls.h>
+#include <l4lib/arch/syslib.h>
+#include <l4lib/ipcdefs.h>
+#include <fcntl.h>
+
+static inline int l4_open(const char *pathname, int flags, mode_t mode)
+{
+	int fd;
+
+	write_mr(L4SYS_ARG0, (unsigned long)pathname);
+	write_mr(L4SYS_ARG1, flags);
+
+	/* Call pager with shmget() request. Check ipc error. */
+	if ((errno = l4_sendrecv(VFS_TID, VFS_TID, L4_IPC_TAG_OPEN)) < 0) {
+		printf("%s: L4 IPC Error: %d.\n", __FUNCTION__, errno);
+		return -1;
+	}
+	/* Check if syscall itself was successful */
+	if ((fd = l4_get_retval()) < 0) {
+		printf("%s: OPEN Error: %d.\n", __FUNCTION__, fd);
+		errno = fd;
+		return -1;
+
+	}
+	return fd;
+}
+
+int open(const char *pathname, int oflag, ...)
+{
+	mode_t mode = 0;
+
+	if (oflag & O_CREAT) {
+		va_list arg;
+		va_start(arg, oflag);
+		mode = va_arg(arg, mode_t);
+		va_end(arg);
+	}
+	return l4_open(pathname, oflag, mode);
+}
+