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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
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9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
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11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
6bb92a16 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
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19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
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22 | #include <stdlib.h> |
23 | #include <unistd.h> | |
6bb92a16 | 24 | #include <signal.h> |
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25 | |
26 | #include "log.h" | |
27 | #include "util.h" | |
0b452006 | 28 | #include "process-util.h" |
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29 | #include "spawn-ask-password-agent.h" |
30 | ||
31 | static pid_t agent_pid = 0; | |
32 | ||
33 | int ask_password_agent_open(void) { | |
34 | int r; | |
35 | ||
36 | if (agent_pid > 0) | |
37 | return 0; | |
38 | ||
39 | /* We check STDIN here, not STDOUT, since this is about input, | |
40 | * not output */ | |
41 | if (!isatty(STDIN_FILENO)) | |
42 | return 0; | |
43 | ||
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44 | r = fork_agent(&agent_pid, |
45 | NULL, 0, | |
46 | SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH, | |
47 | SYSTEMD_TTY_ASK_PASSWORD_AGENT_BINARY_PATH, "--watch", NULL); | |
6bb92a16 | 48 | if (r < 0) |
da927ba9 | 49 | log_error_errno(r, "Failed to fork TTY ask password agent: %m"); |
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50 | |
51 | return r; | |
52 | } | |
53 | ||
54 | void ask_password_agent_close(void) { | |
55 | ||
56 | if (agent_pid <= 0) | |
57 | return; | |
58 | ||
59 | /* Inform agent that we are done */ | |
60 | kill(agent_pid, SIGTERM); | |
61 | kill(agent_pid, SIGCONT); | |
c73d180d | 62 | (void) wait_for_terminate(agent_pid, NULL); |
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63 | agent_pid = 0; |
64 | } |