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