From 91abed9333241731d0cd877beba4e2d4675989c8 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Wed, 13 Jan 2021 19:51:40 +0100
Subject: VFS ready function and read yielding

---
 kernel/features/syscall.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'kernel/features/syscall.c')

diff --git a/kernel/features/syscall.c b/kernel/features/syscall.c
index dbb7033..c5570c3 100644
--- a/kernel/features/syscall.c
+++ b/kernel/features/syscall.c
@@ -37,7 +37,12 @@ void syscall_handler(struct regs *r)
 		break;
 	}
 	case SYS_READ: {
-		r->eax = (u32)vfs_read((char *)r->ebx, (void *)r->ecx, r->edx, r->esi);
+		if (vfs_ready((char *)r->ebx)) {
+			r->eax = (u32)vfs_read((char *)r->ebx, (void *)r->ecx, r->edx, r->esi);
+		} else {
+			proc_current()->state = PROC_SLEEPING;
+			scheduler(r);
+		}
 		break;
 	}
 	case SYS_WRITE: {
-- 
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