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shirou_gopsutil
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Better comments for fallback on /etc/machine-id

This commit is contained in:
Pierre Souchay 2018-11-07 00:08:23 +01:00
parent be2b25a7c6
commit 890eb80501
1 changed files with 4 additions and 1 deletions
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5
host/host_linux.go
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@ -75,7 +75,8 @@ func InfoWithContext(ctx context.Context) (*InfoStat, error) {
sysProductUUID := common.HostSys("class/dmi/id/product_uuid")
machineID := common.HostEtc("machine-id")
switch {
// When not running as root, lib cannot read the value
// In order to read this file, needs to be supported by kernel/arch and run as root
// so having fallback is important
case common.PathExists(sysProductUUID):
lines, err := common.ReadLines(sysProductUUID)
if err == nil && len(lines) > 0 && lines[0] != "" {
@ -83,6 +84,7 @@ func InfoWithContext(ctx context.Context) (*InfoStat, error) {
break
}
fallthrough
// Fallback on GNU Linux systems with systemd, readable by everyone
case common.PathExists(machineID):
lines, err := common.ReadLines(machineID)
if err == nil && len(lines) > 0 && len(lines[0]) == 32 {
@ -91,6 +93,7 @@ func InfoWithContext(ctx context.Context) (*InfoStat, error) {
break
}
fallthrough
// Not stable between reboot, but better than nothing
default:
values, err := common.DoSysctrl("kernel.random.boot_id")
if err == nil && len(values) == 1 && values[0] != "" {