Also try run0 when sudo/pkexec are not found

README.md

@@ -21,7 +21,8 @@ See Contributing.md for how to contribute or get in touch.
 
 Usage
 ---------
-By default synaptic uses pkexec to obtain root privileges needed.
+By default synaptic uses pkexec to obtain root privileges, with run0 as a
+fallback when available.
 
 Synaptic is used very much like apt/apt-get. Aside from a graphical interface, another key difference is it let's you stage several changes and only applies package changes when you click apply.
 

debian/control

@@ -12,7 +12,7 @@ Vcs-Browser: https://github.com/mvo5/synaptic
 
 Package: synaptic
 Architecture: any
-Depends: ${shlibs:Depends}, ${misc:Depends}, hicolor-icon-theme, polkitd | policykit-1, pkexec | policykit-1
+Depends: ${shlibs:Depends}, ${misc:Depends}, hicolor-icon-theme, polkitd, pkexec | systemd
 Recommends: libgtk3-perl, xdg-utils
 Suggests: dwww, deborphan, apt-xapian-index, tasksel, software-properties-gtk
 Description: Graphical package manager

debian/synaptic-pkexec

@@ -1,2 +1,28 @@
 #!/bin/sh
-pkexec "/usr/sbin/synaptic" "$@"
+
+if command -v pkexec >/dev/null 2>&1; then
+	exec pkexec "/usr/sbin/synaptic" "$@"
+fi
+
+if command -v run0 >/dev/null 2>&1; then
+	set -- "/usr/sbin/synaptic" "$@"
+	if [ -n "${DBUS_SESSION_BUS_ADDRESS+x}" ]; then
+		set -- "--setenv=DBUS_SESSION_BUS_ADDRESS" "$@"
+	fi
+	if [ -n "${XDG_RUNTIME_DIR+x}" ]; then
+		set -- "--setenv=XDG_RUNTIME_DIR" "$@"
+	fi
+	if [ -n "${XAUTHORITY+x}" ]; then
+		set -- "--setenv=XAUTHORITY" "$@"
+	fi
+	if [ -n "${WAYLAND_DISPLAY+x}" ]; then
+		set -- "--setenv=WAYLAND_DISPLAY" "$@"
+	fi
+	if [ -n "${DISPLAY+x}" ]; then
+		set -- "--setenv=DISPLAY" "$@"
+	fi
+	exec run0 "$@"
+fi
+
+echo "synaptic-pkexec: pkexec or run0 is required" >&2
+exit 1

gtk/rgutils.cc

@@ -70,6 +70,20 @@ void RGFlushInterface()
    }
 }
 
+static void AddRun0Environment(std::vector<const gchar*> &prefix)
+{
+   if(getenv("DISPLAY") != NULL)
+      prefix.push_back("--setenv=DISPLAY");
+   if(getenv("WAYLAND_DISPLAY") != NULL)
+      prefix.push_back("--setenv=WAYLAND_DISPLAY");
+   if(getenv("XAUTHORITY") != NULL)
+      prefix.push_back("--setenv=XAUTHORITY");
+   if(getenv("XDG_RUNTIME_DIR") != NULL)
+      prefix.push_back("--setenv=XDG_RUNTIME_DIR");
+   if(getenv("DBUS_SESSION_BUS_ADDRESS") != NULL)
+      prefix.push_back("--setenv=DBUS_SESSION_BUS_ADDRESS");
+}
+
 /*
  * SizeToStr: Converts a size long into a human-readable SI string
  * ----------------------------------------------------
@@ -121,7 +135,7 @@ bool RunAsSudoUserCommand(std::vector<const gchar*> cmd)
        return true;
     }
     bool getuidbyname = false;
-    // try pkexec first, then sudo
+    // try pkexec first, then sudo, then run0
     sudo_user = getenv("PKEXEC_UID");
 
     if (sudo_user == NULL) {
@@ -158,6 +172,13 @@ bool RunAsSudoUserCommand(std::vector<const gchar*> cmd)
        prefix.push_back("-u");
        prefix.push_back(sudo_user);
     }
+    else if(FileExists("/usr/bin/run0") && sudo_user != NULL)
+    {
+       prefix.push_back("/usr/bin/run0");
+       AddRun0Environment(prefix);
+       prefix.push_back("-u");
+       prefix.push_back(sudo_user);
+    }
     // insert the prefix string
     cmd.insert(cmd.begin(), prefix.begin(), prefix.end());