2 files changed, 62 insertions, 0 deletions
diff --git a/src/cgroups-agent/cgroups-agent.c b/src/cgroups-agent/cgroups-agent.c
new file mode 100644
index 0000000..16c5a2a
--- /dev/null
+++ b/src/cgroups-agent/cgroups-agent.c
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <stdlib.h>
+
+#include "fd-util.h"
+#include "log.h"
+#include "socket-util.h"
+
+int main(int argc, char *argv[]) {
+
+        static const union sockaddr_union sa = {
+                .un.sun_family = AF_UNIX,
+                .un.sun_path = "/run/systemd/cgroups-agent",
+        };
+
+        _cleanup_close_ int fd = -EBADF;
+        ssize_t n;
+        size_t l;
+        int r;
+
+        r = make_null_stdio();
+        if (r < 0) {
+                log_error_errno(r, "Failed to connect stdin/stdout/stderr with /dev/null: %m");
+                return EXIT_FAILURE;
+        }
+
+        if (argc != 2) {
+                log_error("Incorrect number of arguments.");
+                return EXIT_FAILURE;
+        }
+
+        log_setup();
+
+        fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
+        if (fd < 0) {
+                log_debug_errno(errno, "Failed to allocate socket: %m");
+                return EXIT_FAILURE;
+        }
+
+        l = strlen(argv[1]);
+
+        n = sendto(fd, argv[1], l, 0, &sa.sa, SOCKADDR_UN_LEN(sa.un));
+        if (n < 0) {
+                log_debug_errno(errno, "Failed to send cgroups agent message: %m");
+                return EXIT_FAILURE;
+        }
+
+        if ((size_t) n != l) {
+                log_debug("Datagram size mismatch");
+                return EXIT_FAILURE;
+        }
+
+        return EXIT_SUCCESS;
+}
diff --git a/src/cgroups-agent/meson.build b/src/cgroups-agent/meson.build
new file mode 100644
index 0000000..33ff1f5
--- /dev/null
+++ b/src/cgroups-agent/meson.build
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+executables += [
+        libexec_template + {
+                'name' : 'systemd-cgroups-agent',
+                'sources' : files('cgroups-agent.c'),
+        },
+]