meta: move photon/libc to root

libc/sys/linux/fio.c

@@ -0,0 +1,49 @@
+#include "__fio.h"
+#include "__syscall.h"
+#include "unistd.h"
+
+struct __io_file __stdin = { .fd = 0 };
+struct __io_file __stdout = { .fd = 1 };
+struct __io_file __stderr = { .fd = 2 };
+
+struct __io_file *stdin = &__stdin;
+struct __io_file *stdout = &__stdout;
+struct __io_file *stderr = &__stderr;
+
+int __fileno(struct __io_file *f)
+{
+    return f->fd;
+}
+
+unsigned int __fio_write(struct __io_file *f, const char *buf, unsigned int sz)
+{
+    for (unsigned int i = 0; i < sz; i++) {
+        if (f->buf_idx >= __FIO_BUFSZ) {
+            __fio_flush(f);
+        }
+
+        f->buf[f->buf_idx++] = buf[i];
+        if (buf[i] == '\n') {
+            __fio_flush(f);
+        }
+    }
+
+    return sz;
+}
+
+unsigned int __fio_flush(struct __io_file *f)
+{
+    ssize_t res = write(f->fd, f->buf, f->buf_idx);
+    if (res != f->buf_idx) {
+        f->err = 1;
+    }
+
+    size_t flushed = f->buf_idx;
+    f->buf_idx = 0;
+    return flushed;
+}
+
+int __fio_error(struct __io_file *f)
+{
+    return f->err != 0;
+}