From 54f4f7a23537cceadf1959e787a8593a29fd8bc3 Mon Sep 17 00:00:00 2001
From: Tai Groot <tai@taigrr.com>
Date: Wed, 12 Feb 2025 19:21:48 -0800
Subject: [PATCH] add IsSystemd checker

---
 helpers.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/helpers.go b/helpers.go
index 01cd05c..37d8da6 100644
--- a/helpers.go
+++ b/helpers.go
@@ -3,6 +3,7 @@ package systemctl
 import (
 	"context"
 	"errors"
+	"os"
 	"strconv"
 	"strings"
 	"time"
@@ -112,6 +113,15 @@ func GetMaskedUnits(ctx context.Context, opts Options) ([]string, error) {
 	return units, nil
 }
 
+// check if systemd is the current init system
+func IsSystemd() (bool, error) {
+	b, err := os.ReadFile("/proc/1/comm")
+	if err != nil {
+		return false, err
+	}
+	return strings.TrimSpace(string(b)) == "systemd", nil
+}
+
 // check if a service is masked
 func IsMasked(ctx context.Context, unit string, opts Options) (bool, error) {
 	units, err := GetMaskedUnits(ctx, opts)