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4711bccd05
This fixes a race condition in runc/systemd at container creation time opencontainers/runc#1683 Signed-off-by: vikaschoudhary16 <vichoudh@redhat.com>
42 lines
1.7 KiB
Go
42 lines
1.7 KiB
Go
// Copyright (C) 2017 SUSE LLC. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package securejoin
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import "os"
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// In future this should be moved into a separate package, because now there
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// are several projects (umoci and go-mtree) that are using this sort of
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// interface.
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// VFS is the minimal interface necessary to use SecureJoinVFS. A nil VFS is
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// equivalent to using the standard os.* family of functions. This is mainly
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// used for the purposes of mock testing, but also can be used to otherwise use
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// SecureJoin with VFS-like system.
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type VFS interface {
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// Lstat returns a FileInfo describing the named file. If the file is a
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// symbolic link, the returned FileInfo describes the symbolic link. Lstat
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// makes no attempt to follow the link. These semantics are identical to
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// os.Lstat.
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Lstat(name string) (os.FileInfo, error)
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// Readlink returns the destination of the named symbolic link. These
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// semantics are identical to os.Readlink.
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Readlink(name string) (string, error)
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}
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// osVFS is the "nil" VFS, in that it just passes everything through to the os
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// module.
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type osVFS struct{}
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// Lstat returns a FileInfo describing the named file. If the file is a
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// symbolic link, the returned FileInfo describes the symbolic link. Lstat
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// makes no attempt to follow the link. These semantics are identical to
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// os.Lstat.
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func (o osVFS) Lstat(name string) (os.FileInfo, error) { return os.Lstat(name) }
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// Readlink returns the destination of the named symbolic link. These
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// semantics are identical to os.Readlink.
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func (o osVFS) Readlink(name string) (string, error) { return os.Readlink(name) }
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