67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "log.h"
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#include "process-util.h"
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#include "spawn-ask-password-agent.h"
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#include "util.h"
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static pid_t agent_pid = 0;
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int ask_password_agent_open(void) {
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int r;
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if (agent_pid > 0)
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return 0;
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/* We check STDIN here, not STDOUT, since this is about input,
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* not output */
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if (!isatty(STDIN_FILENO))
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return 0;
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if (!is_main_thread())
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return -EPERM;
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r = fork_agent("(sd-askpwagent)",
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NULL, 0,
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&agent_pid,
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SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH,
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SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH, "--watch", NULL);
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if (r < 0)
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return log_error_errno(r, "Failed to fork TTY ask password agent: %m");
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return 1;
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}
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void ask_password_agent_close(void) {
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if (agent_pid <= 0)
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return;
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/* Inform agent that we are done */
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(void) kill_and_sigcont(agent_pid, SIGTERM);
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(void) wait_for_terminate(agent_pid, NULL);
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agent_pid = 0;
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}
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