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oci/caps: minor optimization in init

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Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2020-09-16 14:22:03 +02:00
parent b00b21b93c
commit 0ec6f7ea23
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GPG key ID: 76698F39D527CE8C
1 changed files with 14 additions and 7 deletions
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21
oci/caps/utils.go
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@ -12,19 +12,26 @@ var capabilityList Capabilities
func init() { func init() {
last := capability.CAP_LAST_CAP last := capability.CAP_LAST_CAP
for _, c := range capability.List() { rawCaps := capability.List()
capabilityList = make(Capabilities, min(int(last+1), len(rawCaps)))
for i, c := range rawCaps {
if c > last { if c > last {
continue continue
} }
capabilityList = append(capabilityList, capabilityList[i] = &CapabilityMapping{
&CapabilityMapping{ Key: "CAP_" + strings.ToUpper(c.String()),
Key: "CAP_" + strings.ToUpper(c.String()), Value: c,
Value: c, }
},
)
} }
} }
func min(a, b int) int {
if a < b {
return a
}
return b
}
type ( type (
// CapabilityMapping maps linux capability name to its value of capability.Cap type // CapabilityMapping maps linux capability name to its value of capability.Cap type
// Capabilities is one of the security systems in Linux Security Module (LSM) // Capabilities is one of the security systems in Linux Security Module (LSM)