Commit | Line | Data |
---|---|---|
8e68d1c8 | 1 | /* |
996b65c8 | 2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> |
1e307fab | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
8e68d1c8 | 4 | * |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
8e68d1c8 | 8 | * |
d14d33bf AM |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
8e68d1c8 | 13 | * |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
8e68d1c8 DG |
17 | */ |
18 | ||
19 | #define _GNU_SOURCE | |
8e68d1c8 | 20 | #include <stdlib.h> |
8e68d1c8 DG |
21 | #include <unistd.h> |
22 | ||
db758600 | 23 | #include <common/error.h> |
7272acf5 | 24 | |
8e68d1c8 | 25 | #include "utils.h" |
0b2dc8df MD |
26 | #include "lttng-sessiond.h" |
27 | ||
28 | int ht_cleanup_pipe[2] = { -1, -1 }; | |
8e68d1c8 | 29 | |
54d01ffb DG |
30 | /* |
31 | * Write to writable pipe used to notify a thread. | |
32 | */ | |
33 | int notify_thread_pipe(int wpipe) | |
34 | { | |
35 | int ret; | |
36 | ||
2f77fc4b DG |
37 | /* Ignore if the pipe is invalid. */ |
38 | if (wpipe < 0) { | |
39 | return 0; | |
40 | } | |
41 | ||
6f94560a MD |
42 | do { |
43 | ret = write(wpipe, "!", 1); | |
44 | } while (ret < 0 && errno == EINTR); | |
54d01ffb | 45 | if (ret < 0) { |
7272acf5 | 46 | PERROR("write poll pipe"); |
54d01ffb DG |
47 | } |
48 | ||
49 | return ret; | |
50 | } | |
51 | ||
b082db07 | 52 | /* |
050349bb | 53 | * Return pointer to home directory path using the env variable HOME. |
b082db07 | 54 | * |
050349bb | 55 | * No home, NULL is returned. |
b082db07 DG |
56 | */ |
57 | const char *get_home_dir(void) | |
58 | { | |
59 | return ((const char *) getenv("HOME")); | |
60 | } | |
0b2dc8df MD |
61 | |
62 | void ht_cleanup_push(struct lttng_ht *ht) | |
63 | { | |
64 | int ret; | |
65 | int fd = ht_cleanup_pipe[1]; | |
66 | ||
67 | if (fd < 0) | |
68 | return; | |
69 | do { | |
70 | ret = write(fd, &ht, sizeof(ht)); | |
71 | } while (ret < 0 && errno == EINTR); | |
72 | if (ret < 0 || ret != sizeof(ht)) { | |
73 | PERROR("write ht cleanup pipe %d", fd); | |
74 | if (ret < 0) { | |
75 | ret = -errno; | |
76 | } | |
77 | goto error; | |
78 | } | |
79 | ||
80 | /* All good. Don't send back the write positive ret value. */ | |
81 | ret = 0; | |
82 | error: | |
83 | assert(!ret); | |
84 | } |