Fix mem leaks in ipcd.

zig-impl/src/context.zig

@@ -119,7 +119,10 @@ pub const Context = struct {
         //   IPC_NETWORK="audio https://example.com/audio ;pong tls://pong.example.com/pong"
         var network_envvar = std.process.getEnvVarOwned(allocator, "IPC_NETWORK") catch |err| switch(err) {
             // error{ OutOfMemory, EnvironmentVariableNotFound, InvalidUtf8 } (ErrorSet)
-            error.EnvironmentVariableNotFound => { return null; }, // no need to contact IPCd
+            error.EnvironmentVariableNotFound => {
+                print("no IPC_NETWORK envvar: IPCd won't be contacted\n", .{});
+                return null;
+            }, // no need to contact IPCd
             else => { return err; },
         };
 
@@ -232,8 +235,15 @@ pub const Context = struct {
     // Create a unix socket.
     // Store std lib structures in the context.
     // TODO: find better error name
-    pub fn server_init(self: *Self, path: [] const u8) !net.StreamServer {
-        // print("context server init {s}\n", .{path});
+    pub fn server_init(self: *Self, service_name: [] const u8) !net.StreamServer {
+        var buffer: [1000]u8 = undefined;
+        var fbs = std.io.fixedBufferStream(&buffer);
+        var writer = fbs.writer();
+
+        try self.server_path(service_name, writer);
+        var path = fbs.getWritten();
+
+        print("context server init {s}\n", .{path});
         var server = net.StreamServer.init(.{});
         var socket_addr = try net.Address.initUnix(path);
         try server.listen(socket_addr);

zig-impl/src/ipcd.zig

@@ -37,10 +37,8 @@ fn create_service() !void {
     var ctx = try ipc.Context.init(allocator);
     defer ctx.deinit(); // There. Can't leak. Isn't Zig wonderful?
 
-    const path = "/tmp/.TEST_USOCK";
-
     // SERVER SIDE: creating a service.
-    _ = try ctx.server_init(path);
+    _ = try ctx.server_init("ipcd");
 
     // signal handler, to quit when asked
     const S = struct {
@@ -132,16 +130,19 @@ fn create_service() !void {
                                        , allocator
                                        , "currently not implemented");
                     try ctx.write(response);
+                    response.deinit();
+                    m.deinit();
                 }
                 else {
                     // There is a problem: ipcd was contacted without providing
                     // a message, meaning there is nothing to do. This should be
                     // explicitely warned about.
-                    var m = try Message.init(some_event.origin
+                    var response = try Message.init(some_event.origin
                                 , Message.Type.ERROR
                                 , allocator
                                 , "lookup message without data");
-                    try ctx.write(m);
+                    try ctx.write(response);
+                    response.deinit();
                 }
             },