From: David van Moolenbroek <david@minix3.org>
Date: Wed, 20 May 2009 09:46:06 +0000 (+0000)
Subject: move symlink type check for readlink() into VFS, and return the right POSIX error
X-Git-Tag: v3.1.4~22
X-Git-Url: http://zhaoyanbai.com/repos/readme1st.txt?a=commitdiff_plain;h=9797d17d5460d5816c9f78099ebc09df88247d1b;p=minix.git

move symlink type check for readlink() into VFS, and return the right POSIX error
---

diff --git a/servers/vfs/link.c b/servers/vfs/link.c
index e2fb29610..fd342593d 100644
--- a/servers/vfs/link.c
+++ b/servers/vfs/link.c
@@ -356,6 +356,13 @@ PUBLIC int do_rdlink()
   r = lookup_vp(PATH_RET_SYMLINK, 0 /*!use_realuid*/, &vp);
   if (r != OK) return r;
 
+  /* Make sure this is a symbolic link */
+  if ((vp->v_mode & I_TYPE) != I_SYMBOLIC_LINK) {
+	put_vnode(vp);
+
+  	return EINVAL;
+  }
+
   /* Issue request */
   r= req_rdlink(vp->v_fs_e, vp->v_inode_nr, who_e, (vir_bytes)m_in.name2,
 	copylen);