config: add comm client criteria

jay-config/src/_private.rs

@@ -92,4 +92,5 @@ pub enum ClientCriterionStringField {
     SandboxEngine,
     SandboxAppId,
     SandboxInstanceId,
+    Comm,
 }

jay-config/src/_private/client.rs

@@ -1545,6 +1545,8 @@ impl ConfigClient {
             ClientCriterion::Uid(p) => ClientCriterionIpc::Uid(p),
             ClientCriterion::Pid(p) => ClientCriterionIpc::Pid(p),
             ClientCriterion::IsXwayland => ClientCriterionIpc::IsXwayland,
+            ClientCriterion::Comm(t) => string!(t, Comm, false),
+            ClientCriterion::CommRegex(t) => string!(t, Comm, true),
         };
         let res = self.send_with_response(&ClientMessage::CreateClientMatcher { criterion });
         get_response!(

jay-config/src/client.rs

@@ -83,6 +83,10 @@ pub enum ClientCriterion<'a> {
     Pid(i32),
     /// Matches if the client is Xwayland.
     IsXwayland,
+    /// Matches the `/proc/pid/comm` of the client verbatim.
+    Comm(&'a str),
+    /// Matches the `/proc/pid/comm` of the client with a regular expression.
+    CommRegex(&'a str),
 }
 
 impl ClientCriterion<'_> {