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-rw-r--r--src/shared/spawn-ask-password-agent.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/src/shared/spawn-ask-password-agent.c b/src/shared/spawn-ask-password-agent.c
new file mode 100644
index 0000000..d34cfff
--- /dev/null
+++ b/src/shared/spawn-ask-password-agent.c
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "exec-util.h"
+#include "log.h"
+#include "process-util.h"
+#include "spawn-ask-password-agent.h"
+
+static pid_t agent_pid = 0;
+
+int ask_password_agent_open(void) {
+ int r;
+
+ if (agent_pid > 0)
+ return 0;
+
+ /* We check STDIN here, not STDOUT, since this is about input,
+ * not output */
+ if (!isatty(STDIN_FILENO))
+ return 0;
+
+ if (!is_main_thread())
+ return -EPERM;
+
+ r = fork_agent("(sd-askpwagent)",
+ NULL, 0,
+ &agent_pid,
+ SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH,
+ SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH, "--watch", NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to fork TTY ask password agent: %m");
+
+ return 1;
+}
+
+void ask_password_agent_close(void) {
+
+ if (agent_pid <= 0)
+ return;
+
+ /* Inform agent that we are done */
+ sigterm_wait(TAKE_PID(agent_pid));
+}
+
+int ask_password_agent_open_if_enabled(BusTransport transport, bool ask_password) {
+
+ /* Open the ask password agent as a child process if necessary */
+
+ if (transport != BUS_TRANSPORT_LOCAL)
+ return 0;
+
+ if (!ask_password)
+ return 0;
+
+ return ask_password_agent_open();
+}