s3: VFS: vfs_cap. Implement linkat().

Currently identical to link().

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Böhme <slow@samba.org>

diff --git a/source3/modules/vfs_cap.c b/source3/modules/vfs_cap.c
index ee48e542930ba4ffcd12a81d2173a5c27a7fa331..b2c1c4878529fc8e43fdc18f54dea9c89cba325c 100644 (file)
--- a/source3/modules/vfs_cap.c
+++ b/source3/modules/vfs_cap.c
@@ -637,6 +637,66 @@ static int cap_link(vfs_handle_struct *handle,
        return ret;
 }
 
+static int cap_linkat(vfs_handle_struct *handle,
+               files_struct *srcfsp,
+               const struct smb_filename *old_smb_fname,
+               files_struct *dstfsp,
+               const struct smb_filename *new_smb_fname,
+               int flags)
+{
+       char *capold = capencode(talloc_tos(), old_smb_fname->base_name);
+       char *capnew = capencode(talloc_tos(), new_smb_fname->base_name);
+       struct smb_filename *old_cap_smb_fname = NULL;
+       struct smb_filename *new_cap_smb_fname = NULL;
+       int saved_errno = 0;
+       int ret;
+
+       if (!capold || !capnew) {
+               errno = ENOMEM;
+               return -1;
+       }
+       old_cap_smb_fname = synthetic_smb_fname(talloc_tos(),
+                                       capold,
+                                       NULL,
+                                       NULL,
+                                       old_smb_fname->flags);
+       if (old_cap_smb_fname == NULL) {
+               TALLOC_FREE(capold);
+               TALLOC_FREE(capnew);
+               errno = ENOMEM;
+               return -1;
+       }
+       new_cap_smb_fname = synthetic_smb_fname(talloc_tos(),
+                                       capnew,
+                                       NULL,
+                                       NULL,
+                                       new_smb_fname->flags);
+       if (new_cap_smb_fname == NULL) {
+               TALLOC_FREE(capold);
+               TALLOC_FREE(capnew);
+               TALLOC_FREE(old_cap_smb_fname);
+               errno = ENOMEM;
+               return -1;
+       }
+       ret = SMB_VFS_NEXT_LINKAT(handle,
+                       srcfsp,
+                       old_cap_smb_fname,
+                       dstfsp,
+                       new_cap_smb_fname,
+                       flags);
+       if (ret == -1) {
+               saved_errno = errno;
+       }
+       TALLOC_FREE(capold);
+       TALLOC_FREE(capnew);
+       TALLOC_FREE(old_cap_smb_fname);
+       TALLOC_FREE(new_cap_smb_fname);
+       if (saved_errno != 0) {
+               errno = saved_errno;
+       }
+       return ret;
+}
+
 static int cap_mknod(vfs_handle_struct *handle,
                const struct smb_filename *smb_fname,
                mode_t mode,
@@ -1027,6 +1087,7 @@ static struct vfs_fn_pointers vfs_cap_fns = {
        .symlink_fn = cap_symlink,
        .readlink_fn = cap_readlink,
        .link_fn = cap_link,
+       .linkat_fn = cap_linkat,
        .mknod_fn = cap_mknod,
        .realpath_fn = cap_realpath,
        .sys_acl_get_file_fn = cap_sys_acl_get_file,