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fix incorrect systemd booted check

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Check for the directory /run/systemd/system, this is described in
sd_booted(3). Reading /proc/1/comm will fail when /proc is mounted
with the `hidepid=2` option.

[NO NEW TESTS NEEDED]

Fixes #16022

Signed-off-by: Paul Holzinger <pholzing@redhat.com>
This commit is contained in:
Paul Holzinger
2022-11-07 17:57:07 +01:00
parent 9e04bab722
commit 919678d2f8
1 changed files with 3 additions and 3 deletions
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6
utils/utils.go
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@ -113,9 +113,9 @@ var (
// RunsOnSystemd returns whether the system is using systemd
func RunsOnSystemd() bool {
runsOnSystemdOnce.Do(func() {
initCommand, err := os.ReadFile("/proc/1/comm")
// On errors, default to systemd
runsOnSystemd = err != nil || strings.TrimRight(string(initCommand), "\n") == "systemd"
// per sd_booted(3), check for this dir
fd, err := os.Stat("/run/systemd/system")
runsOnSystemd = err == nil && fd.IsDir()
})
return runsOnSystemd
}