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Use strings.Cut where possible #4470

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Use strings.Cut where possible #4470

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0e2d611
exec: use strings.Cut to parse --cgroup
kolyshkin Oct 23, 2024
d9e1005
libct/cg/fs: getPercpuUsage: rm TODO
kolyshkin Oct 23, 2024
a8da6c6
libct/cg/fs: refactor getCpusetStat
kolyshkin Oct 23, 2024
a4ed2d8
libcontainer/cgroups/fs: some refactoring
kolyshkin Oct 23, 2024
32fa40a
libct/cg/fs2: simplify parseCgroupFromReader
kolyshkin Oct 23, 2024
486c451
libct/cg/fs2: use strings.Cut in setUnified
kolyshkin Oct 23, 2024
b33fe69
libct/cg/fs2: use strings.Cut in parsePSIData
kolyshkin Oct 23, 2024
4c86035
libct/cg/fscommon: use strings.Cut in RDMA parser
kolyshkin Oct 23, 2024
cddca40
libct/cg/fscommon: use strings.Cut
kolyshkin Oct 23, 2024
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13 changes: 3 additions & 10 deletions libcontainer/cgroups/fs2/defaultpath.go
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Original file line number Diff line number Diff line change
Expand Up @@ -83,16 +83,9 @@ func parseCgroupFile(path string) (string, error) {
func parseCgroupFromReader(r io.Reader) (string, error) {
s := bufio.NewScanner(r)
for s.Scan() {
var (
text = s.Text()
parts = strings.SplitN(text, ":", 3)
)
if len(parts) < 3 {
return "", fmt.Errorf("invalid cgroup entry: %q", text)
}
// text is like "0::/user.slice/user-1001.slice/session-1.scope"
if parts[0] == "0" && parts[1] == "" {
return parts[2], nil
// "0::/user.slice/user-1001.slice/session-1.scope"
if path, ok := strings.CutPrefix(s.Text(), "0::"); ok {
Comment on lines -90 to +87
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Are we missing an error condition for lines that are invalid? Do we need to handle, say 0:::::::/hello.slice/world.scope, or is it fine to let those go through?

return path, nil
}
}
if err := s.Err(); err != nil {
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