Add set_system_proxy for linux and android

common/settings/proxy_android.go

@@ -0,0 +1,39 @@
+package settings
+
+import (
+	"os"
+	"strings"
+
+	C "github.com/sagernet/sing-box/constant"
+	F "github.com/sagernet/sing/common/format"
+)
+
+var (
+	useRish  bool
+	rishPath string
+)
+
+func init() {
+	userId := os.Getuid()
+	if userId == 0 || userId == 1000 || userId == 2000 {
+		useRish = false
+	} else {
+		rishPath, useRish = C.FindPath("rish")
+	}
+}
+
+func runAndroidShell(name string, args ...string) error {
+	if !useRish {
+		return runCommand(name, args...)
+	} else {
+		return runCommand("sh", rishPath, "-c", F.ToString(name, " ", strings.Join(args, " ")))
+	}
+}
+
+func ClearSystemProxy() error {
+	return runAndroidShell("settings", "put", "global", "http_proxy", ":0")
+}
+
+func SetSystemProxy(port uint16, mixed bool) error {
+	return runAndroidShell("settings", "put", "global", "http_proxy", F.ToString("127.0.0.1:", port))
+}