Add set_system_proxy for linux and android

common/settings/proxy_linux.go

@@ -0,0 +1,69 @@
+//go:build linux && !android
+
+package settings
+
+import (
+	"os/exec"
+
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing/common"
+	F "github.com/sagernet/sing/common/format"
+)
+
+var hasGSettings bool
+
+func init() {
+	hasGSettings = common.Error(exec.LookPath("gsettings")) == nil
+}
+
+func ClearSystemProxy() error {
+	if hasGSettings {
+		return runCommand("gsettings", "set", "org.gnome.system.proxy", "mode", "none")
+	}
+	return nil
+}
+
+func SetSystemProxy(port uint16, mixed bool) error {
+	if hasGSettings {
+		err := runCommand("gsettings", "set", "org.gnome.system.proxy.http", "enabled", "true")
+		if err != nil {
+			return err
+		}
+		if mixed {
+			err = setGnomeProxy(port, "ftp", "http", "https", "socks")
+			if err != nil {
+				return err
+			}
+		} else {
+			err = setGnomeProxy(port, "http", "https")
+			if err != nil {
+				return err
+			}
+		}
+		err = runCommand("gsettings", "set", "org.gnome.system.proxy", "use-same-proxy", F.ToString(mixed))
+		if err != nil {
+			return err
+		}
+		err = runCommand("gsettings", "set", "org.gnome.system.proxy", "mode", "manual")
+		if err != nil {
+			return err
+		}
+	} else {
+		log.Warn("set system proxy: unsupported desktop environment")
+	}
+	return nil
+}
+
+func setGnomeProxy(port uint16, proxyTypes ...string) error {
+	for _, proxyType := range proxyTypes {
+		err := runCommand("gsettings", "set", "org.gnome.system.proxy."+proxyType, "host", "127.0.0.1")
+		if err != nil {
+			return err
+		}
+		err = runCommand("gsettings", "set", "org.gnome.system.proxy."+proxyType, "port", F.ToString(port))
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}