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https://github.com/opencontainers/runc.git
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Kir Kolyshkin
56e478046a
Errors from unix.* are always bare and thus can be used directly.
Add //nolint:errorlint annotation to ignore errors such as these:
libcontainer/system/xattrs_linux.go:18:7: comparing with == will fail on wrapped errors. Use errors.Is to check for a specific error (errorlint)
case errno == unix.ERANGE:
^
libcontainer/container_linux.go:1259:9: comparing with != will fail on wrapped errors. Use errors.Is to check for a specific error (errorlint)
if e != unix.EINVAL {
^
libcontainer/rootfs_linux.go:919:7: comparing with != will fail on wrapped errors. Use errors.Is to check for a specific error (errorlint)
if err != unix.EINVAL && err != unix.EPERM {
^
libcontainer/rootfs_linux.go:1002:4: switch on an error will fail on wrapped errors. Use errors.Is to check for specific errors (errorlint)
switch err {
^
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
37 lines
934 B
Go
37 lines
934 B
Go
package system
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import "golang.org/x/sys/unix"
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// Returns a []byte slice if the xattr is set and nil otherwise
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// Requires path and its attribute as arguments
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func Lgetxattr(path string, attr string) ([]byte, error) {
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var sz int
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// Start with a 128 length byte array
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dest := make([]byte, 128)
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sz, errno := unix.Lgetxattr(path, attr, dest)
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//nolint:errorlint // unix errors are bare
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switch {
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case errno == unix.ENODATA:
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return nil, errno
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case errno == unix.ENOTSUP:
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return nil, errno
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case errno == unix.ERANGE:
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// 128 byte array might just not be good enough,
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// A dummy buffer is used to get the real size
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// of the xattrs on disk
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sz, errno = unix.Lgetxattr(path, attr, []byte{})
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if errno != nil {
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return nil, errno
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}
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dest = make([]byte, sz)
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sz, errno = unix.Lgetxattr(path, attr, dest)
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if errno != nil {
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return nil, errno
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}
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case errno != nil:
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return nil, errno
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}
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return dest[:sz], nil
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}
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