+ service: support "-s reload" command

util/os_freebsd.go

@@ -25,3 +25,8 @@ func SetRlimit(val uint) {
 func HaveAdminRights() (bool, error) {
 	return os.Getuid() == 0, nil
 }
+
+// SendProcessSignal - send signal to a process
+func SendProcessSignal(pid int, sig syscall.Signal) error {
+	return syscall.Kill(pid, sig)
+}

util/os_unix.go

@@ -25,3 +25,8 @@ func SetRlimit(val uint) {
 func HaveAdminRights() (bool, error) {
 	return os.Getuid() == 0, nil
 }
+
+// SendProcessSignal - send signal to a process
+func SendProcessSignal(pid int, sig syscall.Signal) error {
+	return syscall.Kill(pid, sig)
+}

util/os_windows.go

@@ -1,6 +1,11 @@
 package util
 
-import "golang.org/x/sys/windows"
+import (
+	"fmt"
+	"syscall"
+
+	"golang.org/x/sys/windows"
+)
 
 // Set user-specified limit of how many fd's we can use
 func SetRlimit(val uint) {
@@ -26,3 +31,7 @@ func HaveAdminRights() (bool, error) {
 	}
 	return true, nil
 }
+
+func SendProcessSignal(pid int, sig syscall.Signal) error {
+	return fmt.Errorf("not supported on Windows")
+}