From ffe292330337b4c78932cde808463752196f531f Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Sat, 4 Jan 2025 21:18:42 +0900
Subject: [PATCH] sd-varlink: introduce sd_varlink_get_current_method()

---
 src/libsystemd/libsystemd.sym          |  1 +
 src/libsystemd/sd-varlink/sd-varlink.c | 19 +++++++++++++++++++
 src/systemd/sd-varlink.h               |  1 +
 3 files changed, 21 insertions(+)

diff --git a/src/libsystemd/libsystemd.sym b/src/libsystemd/libsystemd.sym
index c310aa903f..c953085ef9 100644
--- a/src/libsystemd/libsystemd.sym
+++ b/src/libsystemd/libsystemd.sym
@@ -1065,6 +1065,7 @@ global:
         sd_device_enumerator_add_all_parents;
         sd_json_variant_type_from_string;
         sd_json_variant_type_to_string;
+        sd_varlink_get_current_method;
         sd_varlink_get_input_fd;
         sd_varlink_get_output_fd;
         sd_varlink_reset_fds;
diff --git a/src/libsystemd/sd-varlink/sd-varlink.c b/src/libsystemd/sd-varlink/sd-varlink.c
index 5e26f0f97e..46dd3a62df 100644
--- a/src/libsystemd/sd-varlink/sd-varlink.c
+++ b/src/libsystemd/sd-varlink/sd-varlink.c
@@ -1542,6 +1542,25 @@ _public_ int sd_varlink_dispatch_again(sd_varlink *v) {
         return 0;
 }
 
+_public_ int sd_varlink_get_current_method(sd_varlink *v, const char **ret) {
+        assert_return(v, -EINVAL);
+
+        if (!v->current)
+                return -ENODATA;
+
+        sd_json_variant *p = sd_json_variant_by_key(v->current, "method");
+        if (!p)
+                return -ENODATA;
+
+        const char *s = sd_json_variant_string(p);
+        if (!s)
+                return -ENODATA;
+
+        if (ret)
+                *ret = s;
+        return 0;
+}
+
 _public_ int sd_varlink_get_current_parameters(sd_varlink *v, sd_json_variant **ret) {
         sd_json_variant *p;
 
diff --git a/src/systemd/sd-varlink.h b/src/systemd/sd-varlink.h
index 223d02f4d7..6329c4ee6a 100644
--- a/src/systemd/sd-varlink.h
+++ b/src/systemd/sd-varlink.h
@@ -178,6 +178,7 @@ int sd_varlink_notifyb(sd_varlink *v, ...);
 int sd_varlink_dispatch_again(sd_varlink *v);
 
 /* Get the currently processed incoming message */
+int sd_varlink_get_current_method(sd_varlink *v, const char **ret);
 int sd_varlink_get_current_parameters(sd_varlink *v, sd_json_variant **ret);
 
 /* Parsing incoming data via json_dispatch() and generate a nice error on parse errors */