hst/dbus: validate interface strings

This is relocated to hst to validate early.

Signed-off-by: Ophestra <cat@gensokyo.uk>

system/dbus/config.go

@@ -1,74 +1,12 @@
 package dbus
 
 import (
-	"strings"
-
 	"hakurei.app/hst"
 )
 
 // ProxyPair is an upstream dbus address and a downstream socket path.
 type ProxyPair [2]string
 
-// interfacesAll returns an iterator over all interfaces specified in c.
-func interfacesAll(c *hst.BusConfig) func(yield func(string) bool) {
-	return func(yield func(string) bool) {
-		for _, iface := range c.See {
-			if !yield(iface) {
-				return
-			}
-		}
-		for _, iface := range c.Talk {
-			if !yield(iface) {
-				return
-			}
-		}
-		for _, iface := range c.Own {
-			if !yield(iface) {
-				return
-			}
-		}
-
-		for iface := range c.Call {
-			if !yield(iface) {
-				return
-			}
-		}
-		for iface := range c.Broadcast {
-			if !yield(iface) {
-				return
-			}
-		}
-	}
-}
-
-// checkInterfaces checks [hst.BusConfig] for invalid interfaces based on an undocumented check in xdg-dbus-error,
-// returning [BadInterfaceError] if one is encountered.
-func checkInterfaces(c *hst.BusConfig, segment string) error {
-	for iface := range interfacesAll(c) {
-		/*
-			xdg-dbus-proxy fails without output when this condition is not met:
-				char *dot = strrchr (filter->interface, '.');
-				if (dot != NULL)
-				  {
-				    *dot = 0;
-				    if (strcmp (dot + 1, "*") != 0)
-				      filter->member = g_strdup (dot + 1);
-				  }
-
-			trim ".*" since they are removed before searching for '.':
-				if (g_str_has_suffix (name, ".*"))
-				  {
-				    name[strlen (name) - 2] = 0;
-				    wildcard = TRUE;
-				  }
-		*/
-		if strings.IndexByte(strings.TrimSuffix(iface, ".*"), '.') == -1 {
-			return &BadInterfaceError{iface, segment}
-		}
-	}
-	return nil
-}
-
 // Args returns the xdg-dbus-proxy arguments equivalent of [hst.BusConfig].
 func Args(c *hst.BusConfig, bus ProxyPair) (args []string) {
 	argc := 2 + len(c.See) + len(c.Talk) + len(c.Own) + len(c.Call) + len(c.Broadcast)