package fscommon

import "github.com/opencontainers/runc/libcontainer/cgroups/fscommon"

Index ¶

• Variables
• func GetCgroupParamInt(path, file string) (int64, error)
• func GetCgroupParamString(path, file string) (string, error)
• func GetCgroupParamUint(path, file string) (uint64, error)
• func GetValueByKey(path, file, key string) (uint64, error)
• func OpenFile(dir, file string, flags int) (*os.File, error)
• func ParseKeyValue(t string) (string, uint64, error)
• func ParseUint(s string, base, bitSize int) (uint64, error)
• func ReadFile(dir, file string) (string, error)
• func WriteFile(dir, file, data string) error

Variables ¶

var (
	ErrNotValidFormat = errors.New("line is not a valid key value format")
)

var (
	// TestMode is set to true by unit tests that need "fake" cgroupfs.
	TestMode bool
)

Functions ¶

func GetCgroupParamInt ¶

func GetCgroupParamInt(path, file string) (int64, error)

GetCgroupParamInt reads a single int64 value from specified cgroup file. If the value read is "max", the math.MaxInt64 is returned.

func GetCgroupParamString ¶

func GetCgroupParamString(path, file string) (string, error)

GetCgroupParamString reads a string from the specified cgroup file.

func GetCgroupParamUint ¶

func GetCgroupParamUint(path, file string) (uint64, error)

GetCgroupParamUint reads a single uint64 value from the specified cgroup file. If the value read is "max", the math.MaxUint64 is returned.

func GetValueByKey ¶

func GetValueByKey(path, file, key string) (uint64, error)

GetValueByKey reads a key-value pairs from the specified cgroup file, and returns a value of the specified key. ParseUint is used for value conversion.

func OpenFile ¶

func OpenFile(dir, file string, flags int) (*os.File, error)

OpenFile opens a cgroup file in a given dir with given flags. It is supposed to be used for cgroup files only.

func ParseKeyValue ¶

func ParseKeyValue(t string) (string, uint64, error)

ParseKeyValue parses a space-separated "name value" kind of cgroup parameter and returns its key as a string, and its value as uint64 (ParseUint is used to convert the value). For example, "io_service_bytes 1234" will be returned as "io_service_bytes", 1234.

func ParseUint ¶

func ParseUint(s string, base, bitSize int) (uint64, error)

ParseUint converts a string to an uint64 integer. Negative values are returned at zero as, due to kernel bugs, some of the memory cgroup stats can be negative.

func ReadFile ¶

func ReadFile(dir, file string) (string, error)

ReadFile reads data from a cgroup file in dir. It is supposed to be used for cgroup files only.

func WriteFile ¶

func WriteFile(dir, file, data string) error

WriteFile writes data to a cgroup file in dir. It is supposed to be used for cgroup files only.

Source Files ¶

fscommon.go open.go utils.go