/***
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 "log.h"
#include "process-util.h"
#include "spawn-ask-password-agent.h"
#include "util.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;
}