[Minios-devel] [UNIKRAFT PATCH 4/5] lib/vfscore: mark stdio as a character device

[Yuri Volchkov <yuri.volchkov@xxxxxxxxx>]

Newlib implements printf via writing to stdout. I does a couple of
checks before writing into the file. Make sure these checks are
passed.

Signed-off-by: Yuri Volchkov <yuri.volchkov@xxxxxxxxx>
---
 lib/vfscore/stdio.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/vfscore/stdio.c b/lib/vfscore/stdio.c
index ee8a5b1d..b73b132c 100644
--- a/lib/vfscore/stdio.c
+++ b/lib/vfscore/stdio.c
@@ -85,10 +85,16 @@ static ssize_t stdio_read(struct vnode *vp __unused,
        return bytes_total;
 }
 
+static int
+stdio_getattr(struct vnode *vnode __unused, struct vattr *attr __unused)
+{
+       return 0;
+}
 
 static struct vnops stdio_vnops = {
        .vop_write = stdio_write,
        .vop_read = stdio_read,
+       .vop_getattr = stdio_getattr,
 };
 
 static struct vnode stdio_vnode = {
@@ -96,6 +102,7 @@ static struct vnode stdio_vnode = {
        .v_op = &stdio_vnops,
        .v_lock = UK_MUTEX_INITIALIZER(stdio_vnode.v_lock),
        .v_refcnt = 1,
+       .v_type = VCHR,
 };
 
 static struct dentry stdio_dentry = {
-- 
2.19.2


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