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99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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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 <sys/types.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/prctl.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/poll.h>
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#include "log.h"
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#include "util.h"
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#include "spawn-polkit-agent.h"
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#ifdef ENABLE_POLKIT
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static pid_t agent_pid = 0;
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int polkit_agent_open(void) {
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int r;
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int pipe_fd[2];
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char notify_fd[10 + 1];
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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 (pipe2(pipe_fd, 0) < 0)
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return -errno;
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snprintf(notify_fd, sizeof(notify_fd), "%i", pipe_fd[1]);
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char_array_0(notify_fd);
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r = fork_agent(&agent_pid,
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&pipe_fd[1], 1,
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POLKIT_AGENT_BINARY_PATH,
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POLKIT_AGENT_BINARY_PATH, "--notify-fd", notify_fd, "--fallback", NULL);
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/* Close the writing side, because that's the one for the agent */
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safe_close(pipe_fd[1]);
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if (r < 0)
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log_error_errno(r, "Failed to fork TTY ask password agent: %m");
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else
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/* Wait until the agent closes the fd */
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fd_wait_for_event(pipe_fd[0], POLLHUP, USEC_INFINITY);
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safe_close(pipe_fd[0]);
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return r;
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}
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void polkit_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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kill(agent_pid, SIGTERM);
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kill(agent_pid, SIGCONT);
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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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#else
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int polkit_agent_open(void) {
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return 0;
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}
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void polkit_agent_close(void) {
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}
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#endif
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