From 8f2a455cf3866857349e377cd2cf2bb898e0a494 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Wed, 21 Aug 2024 11:55:38 -0400
Subject: kernel: Add ref count to filedesc

Keep track of how many threads are currently using the file descriptor.
This will be useful when fork() is implemented.

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/kern/vfs_syscalls.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'sys/kern')

diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c
index 371c1a5..937ae87 100644
--- a/sys/kern/vfs_syscalls.c
+++ b/sys/kern/vfs_syscalls.c
@@ -90,6 +90,7 @@ fd_alloc(struct filedesc **fd_out)
             return -ENOMEM;
         }
 
+        fd->refcnt = 1;
         fd->fdno = i;
         td->fds[i] = fd;
 
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