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limits.go
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limits.go
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package linux
import "strconv"
const (
Unlimited uint64 = 1<<64 - 1
)
type Limits struct {
Name string
Soft uint64
Hard uint64
Unit string
}
type ProcLimits struct {
CPUTime Limits // seconds
FileSize Limits // bytes
DataSize Limits // bytes
StackSize Limits // bytes
CoreFileSize Limits // bytes
ResidentSet Limits // bytes
Processes Limits // processes
OpenFiles Limits // files
LockedMemory Limits // bytes
AddressSpace Limits // bytes
FileLocks Limits // locks
PendingSignals Limits // signals
MsgqueueSize Limits // bytes
NicePriority Limits
RealtimePriority Limits
RealtimeTimeout Limits
}
func GetProcLimits(pid int) (proc ProcLimits, err error) {
defer func() { err = convertPanicToError(recover()) }()
proc = parseProcLimits(readProcFile(pid, "limits"))
return
}
func ParseProcLimits(s string) (proc ProcLimits, err error) {
defer func() { err = convertPanicToError(recover()) }()
proc = parseProcLimits(s)
return
}
func parseProcLimits(s string) (proc ProcLimits) {
index := map[string]*Limits{
"Max cpu time": &proc.CPUTime,
"Max file size": &proc.FileSize,
"Max data size": &proc.DataSize,
"Max stack size": &proc.StackSize,
"Max core file size": &proc.CoreFileSize,
"Max resident set": &proc.ResidentSet,
"Max processes": &proc.Processes,
"Max open files": &proc.OpenFiles,
"Max locked memory": &proc.LockedMemory,
"Max address space": &proc.AddressSpace,
"Max file locks": &proc.FileLocks,
"Max pending signals": &proc.PendingSignals,
"Max msgqueue size": &proc.MsgqueueSize,
"Max nice priority": &proc.NicePriority,
"Max realtime priority": &proc.RealtimePriority,
"Max realtime timeout": &proc.RealtimeTimeout,
}
columns := make([]string, 0, 4)
forEachLineExceptFirst(s, func(line string) {
columns = columns[:0]
forEachColumn(line, func(col string) { columns = append(columns, col) })
var limits Limits
var length = len(columns)
if length > 0 {
limits.Name = columns[0]
}
if length > 1 {
limits.Soft = parseLimitUint(columns[1])
}
if length > 2 {
limits.Hard = parseLimitUint(columns[2])
}
if length > 3 {
limits.Unit = columns[3]
}
if ptr := index[limits.Name]; ptr != nil {
*ptr = limits
}
})
return
}
func parseLimitUint(s string) uint64 {
if s == "unlimited" {
return Unlimited
}
v, e := strconv.ParseUint(s, 10, 64)
check(e)
return v
}