1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
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 <sys/types.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/prctl.h>
#include <signal.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/poll.h>
#include "log.h"
#include "util.h"
#include "spawn-polkit-agent.h"
static pid_t agent_pid = 0;
int polkit_agent_open(void) {
int r;
int pipe_fd[2];
char notify_fd[10 + 1];
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 (pipe2(pipe_fd, 0) < 0)
return -errno;
snprintf(notify_fd, sizeof(notify_fd), "%i", pipe_fd[1]);
char_array_0(notify_fd);
r = fork_agent(&agent_pid,
&pipe_fd[1], 1,
POLKIT_AGENT_BINARY_PATH,
POLKIT_AGENT_BINARY_PATH, "--notify-fd", notify_fd, "--fallback", NULL);
/* Close the writing side, because that's the one for the agent */
close_nointr_nofail(pipe_fd[1]);
if (r < 0)
log_error("Failed to fork TTY ask password agent: %s", strerror(-r));
else
/* Wait until the agent closes the fd */
fd_wait_for_event(pipe_fd[0], POLLHUP, (usec_t) -1);
close_nointr_nofail(pipe_fd[0]);
return r;
}
void polkit_agent_close(void) {
if (agent_pid <= 0)
return;
/* Inform agent that we are done */
kill(agent_pid, SIGTERM);
kill(agent_pid, SIGCONT);
wait_for_terminate(agent_pid, NULL);
agent_pid = 0;
}
|
