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663996b3 MS |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2011 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
6300502b | 20 | #include <signal.h> |
663996b3 MS |
21 | #include <stdlib.h> |
22 | #include <unistd.h> | |
663996b3 MS |
23 | |
24 | #include "log.h" | |
e3bff60a | 25 | #include "process-util.h" |
663996b3 | 26 | #include "spawn-ask-password-agent.h" |
db2df898 | 27 | #include "util.h" |
663996b3 MS |
28 | |
29 | static pid_t agent_pid = 0; | |
30 | ||
31 | int ask_password_agent_open(void) { | |
32 | int r; | |
33 | ||
34 | if (agent_pid > 0) | |
35 | return 0; | |
36 | ||
37 | /* We check STDIN here, not STDOUT, since this is about input, | |
38 | * not output */ | |
39 | if (!isatty(STDIN_FILENO)) | |
40 | return 0; | |
41 | ||
42 | r = fork_agent(&agent_pid, | |
43 | NULL, 0, | |
44 | SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH, | |
45 | SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH, "--watch", NULL); | |
46 | if (r < 0) | |
6300502b | 47 | return log_error_errno(r, "Failed to fork TTY ask password agent: %m"); |
663996b3 | 48 | |
6300502b | 49 | return 1; |
663996b3 MS |
50 | } |
51 | ||
52 | void ask_password_agent_close(void) { | |
53 | ||
54 | if (agent_pid <= 0) | |
55 | return; | |
56 | ||
57 | /* Inform agent that we are done */ | |
6300502b MP |
58 | (void) kill(agent_pid, SIGTERM); |
59 | (void) kill(agent_pid, SIGCONT); | |
f47781d8 | 60 | (void) wait_for_terminate(agent_pid, NULL); |
663996b3 MS |
61 | agent_pid = 0; |
62 | } |