From 364e620ce9482e1a49912b805fd9de868b0a77ec Mon Sep 17 00:00:00 2001
From: Matheus <matheusuky@gmail.com>
Date: Fri, 23 Sep 2022 19:38:26 -0300
Subject: [PATCH] fcntl: F_DUPFD

---
 src/sys/syscalls/fcntl.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/sys/syscalls/fcntl.c b/src/sys/syscalls/fcntl.c
index 2f6cd0b1..fe2bc991 100644
--- a/src/sys/syscalls/fcntl.c
+++ b/src/sys/syscalls/fcntl.c
@@ -17,14 +17,18 @@ syscallret syscall_fcntl(int ifd, int cmd, uint64_t arg){
 	
 	fd_t* fd = NULL;
 
+	proc_t* proc = arch_getcls()->thread->proc;
+
 	if(cmd != F_DUPFD){
-		retv.errno = fd_access(&arch_getcls()->thread->proc->fdtable, &fd, ifd);
+		retv.errno = fd_access(&proc->fdtable, &fd, ifd);
 		if(retv.errno)
 			return retv;
 	}
 
-
 	switch(cmd){
+		case F_DUPFD:
+			retv.errno = fd_duplicate(&proc->fdtable, ifd, arg, 1, &retv.ret);
+			return retv;
 		case F_GETFD: // no fd flags implemented
 		case F_SETFD:
 			retv.ret = 0;