From 28424105e255f0a4c887b6e6a83afd6dce372709 Mon Sep 17 00:00:00 2001
From: Charles <sircharlesaze@gmail.com>
Date: Sun, 23 Feb 2020 06:31:47 +0100
Subject: Added ft_read.s ft_write.s error handling

---
 ft_read.s | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

(limited to 'ft_read.s')

diff --git a/ft_read.s b/ft_read.s
index 564f2fc..f65ade3 100644
--- a/ft_read.s
+++ b/ft_read.s
@@ -12,6 +12,10 @@
 
 global _ft_read
 
+%define F_GETFD 1
+%define SYSCALL_READ 0x2000003
+%define SYSCALL_FCNTL 0x200005c
+
 ; int ft_read(int, void*, size_t);
 _ft_read:
 	cmp rdx, 0
@@ -20,7 +24,19 @@ _ft_read:
 	jl  FT_READ_ERROR
 	cmp rsi, 0
 	je  FT_READ_ERROR
-	mov rax, 0x2000003
+
+	push rdx
+	push rsi
+	xor  rsi, rsi
+	mov  esi, F_GETFD
+	mov  rax, SYSCALL_FCNTL 
+	syscall
+	pop  rsi
+	pop  rdx
+	cmp  eax, 0
+	jne  FT_READ_ERROR
+
+	mov rax, SYSCALL_READ
 	syscall
 	ret
 FT_READ_ERROR:
-- 
cgit