1 files changed, 42 insertions, 0 deletions
diff --git a/lib/libc/internal/init/io.c b/lib/libc/internal/init/io.c
new file mode 100644
index 00000000..4790af89
--- /dev/null
+++ b/lib/libc/internal/init/io.c
@@ -0,0 +1,42 @@
+#include <atomic.h>
+#include <fcntl.h>
+#include <libc.h>
+#include <stdio.h>
+#include <unistd.h>
+
+struct __FILE *const stdout = (struct __FILE *)&__libc.stdout;
+struct __FILE *const stdin = (struct __FILE *)&__libc.stdin;
+struct __FILE *const stderr = (struct __FILE *)&__libc.stderr;
+
+void __libc_init_io(void)
+{
+	/* stdout */
+	memset(&__libc.stdout, 0, sizeof(struct __FILE));
+	__libc.stdout.fd = STDOUT_FILENO;
+	__libc.stdout.flags = O_WRONLY;
+	__libc.stdout.type = _IOLBF;
+	__libc.stdout.buf = NULL;
+	__libc.stdout.buf_size = 0;
+	__libc.stdout.buf_len = 0;
+	__libc.stdout.buf_pos = 0;
+
+	/* stdin */
+	memset(&__libc.stdin, 0, sizeof(struct __FILE));
+	__libc.stdin.fd = STDIN_FILENO;
+	__libc.stdin.flags = O_RDONLY;
+	__libc.stdin.type = _IONBF;
+	__libc.stdin.buf = NULL;
+	__libc.stdin.buf_size = 0;
+	__libc.stdin.buf_len = 0;
+	__libc.stdin.buf_pos = 0;
+
+	/* stderr */
+	memset(&__libc.stderr, 0, sizeof(struct __FILE));
+	__libc.stderr.fd = STDERR_FILENO;
+	__libc.stderr.flags = O_WRONLY;
+	__libc.stderr.type = _IONBF;
+	__libc.stderr.buf = NULL;
+	__libc.stderr.buf_size = 0;
+	__libc.stderr.buf_len = 0;
+	__libc.stderr.buf_pos = 0;
+}