From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 14 Feb 2025 13:33:48 +0000 (+0100)
Subject: sd-varlink: add new sd_varlink_get_n_fds() helper
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=bf1e5d5a0f06ba48b10ef2df1f3066fd164fca56;p=thirdparty%2Fsystemd.git

sd-varlink: add new sd_varlink_get_n_fds() helper

This new call returns how many fds have been associated with the current
incoming message.
---

diff --git a/src/libsystemd/libsystemd.sym b/src/libsystemd/libsystemd.sym
index 726a6bce12a..07553359df9 100644
--- a/src/libsystemd/libsystemd.sym
+++ b/src/libsystemd/libsystemd.sym
@@ -1069,6 +1069,7 @@ global:
         sd_varlink_get_current_method;
         sd_varlink_get_description;
         sd_varlink_get_input_fd;
+        sd_varlink_get_n_fds;
         sd_varlink_get_output_fd;
         sd_varlink_reset_fds;
         sd_varlink_server_listen_name;
diff --git a/src/libsystemd/sd-varlink/sd-varlink.c b/src/libsystemd/sd-varlink/sd-varlink.c
index d2ece7b2e6d..cdfcb9935e8 100644
--- a/src/libsystemd/sd-varlink/sd-varlink.c
+++ b/src/libsystemd/sd-varlink/sd-varlink.c
@@ -3183,6 +3183,15 @@ _public_ int sd_varlink_take_fd(sd_varlink *v, size_t i) {
         return TAKE_FD(v->input_fds[i]);
 }
 
+_public_ int sd_varlink_get_n_fds(sd_varlink *v) {
+        assert_return(v, -EINVAL);
+
+        if (!v->allow_fd_passing_input)
+                return -EPERM;
+
+        return (int) v->n_input_fds;
+}
+
 static int verify_unix_socket(sd_varlink *v) {
         assert(v);
 
diff --git a/src/systemd/sd-varlink.h b/src/systemd/sd-varlink.h
index 528c20e8295..27e63a7fba1 100644
--- a/src/systemd/sd-varlink.h
+++ b/src/systemd/sd-varlink.h
@@ -195,6 +195,7 @@ int sd_varlink_reset_fds(sd_varlink *v);
 int sd_varlink_peek_fd(sd_varlink *v, size_t i);
 int sd_varlink_peek_dup_fd(sd_varlink *v, size_t i);
 int sd_varlink_take_fd(sd_varlink *v, size_t i);
+int sd_varlink_get_n_fds(sd_varlink *v);
 
 int sd_varlink_set_allow_fd_passing_input(sd_varlink *v, int b);
 int sd_varlink_set_allow_fd_passing_output(sd_varlink *v, int b);