1 files changed, 62 insertions, 0 deletions
diff --git a/src/libsystemd-shared/src/spawn-ask-password-agent.c b/src/libsystemd-shared/src/spawn-ask-password-agent.c
new file mode 100644
index 0000000000..2ba48157d0
--- /dev/null
+++ b/src/libsystemd-shared/src/spawn-ask-password-agent.c
@@ -0,0 +1,62 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2011 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "systemd-basic/log.h"
+#include "systemd-basic/process-util.h"
+#include "systemd-basic/util.h"
+#include "systemd-shared/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;
+
+        r = fork_agent(&agent_pid,
+                       NULL, 0,
+                       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 */
+        (void) kill(agent_pid, SIGTERM);
+        (void) kill(agent_pid, SIGCONT);
+        (void) wait_for_terminate(agent_pid, NULL);
+        agent_pid = 0;
+}