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65 lines
1.7 KiB
Go
65 lines
1.7 KiB
Go
// -*- Mode: Go; indent-tabs-mode: t -*-
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/*
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* Copyright (C) 2020 Canonical Ltd
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 3 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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package systemd
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import (
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"fmt"
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"os/exec"
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"github.com/snapcore/snapd/osutil"
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)
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var (
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systemdSysctlPath = "/lib/systemd/systemd-sysctl"
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)
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var systemdSysctlCmd = func(args ...string) error {
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bs, err := exec.Command(systemdSysctlPath, args...).CombinedOutput()
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if err != nil {
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exitCode, err := osutil.ExitCode(err)
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if err != nil {
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return err
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}
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return fmt.Errorf("%s invoked with %v failed with exit status %d: %s", systemdSysctlPath, args, exitCode, bs)
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}
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return nil
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}
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// Sysctl invokes systemd-sysctl to configure sysctl(8) kernel parameters
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// from disk configuration. A set of prefixes can be passed to limit
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// which settings are (re)configured.
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func Sysctl(prefixes []string) error {
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args := []string{}
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for _, p := range prefixes {
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args = append(args, "--prefix", p)
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}
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return systemdSysctlCmd(args...)
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}
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// MockSystemdSysctl lets mock and intercept calls to systemd-sysctl
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// from the package.
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func MockSystemdSysctl(f func(args ...string) error) func() {
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oldsystemdSysctlCmd := systemdSysctlCmd
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systemdSysctlCmd = f
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return func() {
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systemdSysctlCmd = oldsystemdSysctlCmd
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}
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}
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