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// SPDX-License-Identifier: GPL-3.0-or-later
package fail2ban
import (
"context"
"errors"
"fmt"
"os/exec"
"strings"
"time"
"github.com/netdata/netdata/go/go.d.plugin/logger"
)
var errJailNotExist = errors.New("jail not exist")
func newFail2BanClientCliExec(ndsudoPath string, timeout time.Duration, log *logger.Logger) *fail2banClientCliExec {
return &fail2banClientCliExec{
Logger: log,
ndsudoPath: ndsudoPath,
timeout: timeout,
}
}
type fail2banClientCliExec struct {
*logger.Logger
ndsudoPath string
timeout time.Duration
}
func (e *fail2banClientCliExec) status() ([]byte, error) {
return e.execute("fail2ban-client-status")
}
func (e *fail2banClientCliExec) jailStatus(jail string) ([]byte, error) {
return e.execute("fail2ban-client-status-jail", "--jail", jail)
}
func (e *fail2banClientCliExec) execute(args ...string) ([]byte, error) {
ctx, cancel := context.WithTimeout(context.Background(), e.timeout)
defer cancel()
cmd := exec.CommandContext(ctx, e.ndsudoPath, args...)
e.Debugf("executing '%s'", cmd)
bs, err := cmd.Output()
if err != nil {
if strings.HasPrefix(strings.TrimSpace(string(bs)), "Sorry but the jail") {
return nil, errJailNotExist
}
return nil, fmt.Errorf("error on '%s': %v", cmd, err)
}
return bs, nil
}
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