b5dd78da3d
Main upgrades: - github.com/opencontainers/runc v1.0.0-rc93 - github.com/containerd/containerd v1.4.4 - github.com/docker/docker v20.10.2 - github.com/mrunalp/fileutils v0.5.0 - github.com/opencontainers/selinux v1.8.0 - github.com/cilium/ebpf v0.2.0
52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
// +build linux
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package fscommon
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import (
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"bytes"
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"os"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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"golang.org/x/sys/unix"
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)
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// WriteFile writes data to a cgroup file in dir.
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// It is supposed to be used for cgroup files only.
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func WriteFile(dir, file, data string) error {
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fd, err := OpenFile(dir, file, unix.O_WRONLY)
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if err != nil {
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return err
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}
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defer fd.Close()
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if err := retryingWriteFile(fd, data); err != nil {
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return errors.Wrapf(err, "failed to write %q", data)
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}
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return nil
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}
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// ReadFile reads data from a cgroup file in dir.
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// It is supposed to be used for cgroup files only.
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func ReadFile(dir, file string) (string, error) {
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fd, err := OpenFile(dir, file, unix.O_RDONLY)
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if err != nil {
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return "", err
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}
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defer fd.Close()
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var buf bytes.Buffer
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_, err = buf.ReadFrom(fd)
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return buf.String(), err
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}
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func retryingWriteFile(fd *os.File, data string) error {
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for {
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_, err := fd.Write([]byte(data))
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if errors.Is(err, unix.EINTR) {
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logrus.Infof("interrupted while writing %s to %s", data, fd.Name())
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continue
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}
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return err
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}
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}
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