Commit | Line | Data |
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c0a66c84 JG |
1 | /* |
2 | * Copyright (C) 2020 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: LGPL-2.1-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #include "payload.h" | |
e368fb43 JG |
9 | #include <common/dynamic-array.h> |
10 | #include <common/dynamic-buffer.h> | |
11 | #include <common/error.h> | |
c0a66c84 JG |
12 | |
13 | LTTNG_HIDDEN | |
14 | void lttng_payload_init(struct lttng_payload *payload) | |
15 | { | |
16 | assert(payload); | |
17 | lttng_dynamic_buffer_init(&payload->buffer); | |
18 | lttng_dynamic_array_init(&payload->_fds, sizeof(int), NULL); | |
19 | } | |
20 | ||
e368fb43 JG |
21 | LTTNG_HIDDEN |
22 | int lttng_payload_copy(const struct lttng_payload *src_payload, | |
23 | struct lttng_payload *dst_payload) | |
24 | { | |
25 | int ret; | |
26 | size_t i; | |
27 | ||
28 | lttng_payload_init(dst_payload); | |
29 | ret = lttng_dynamic_buffer_append_buffer( | |
30 | &dst_payload->buffer, &src_payload->buffer); | |
31 | if (ret) { | |
32 | goto error; | |
33 | } | |
34 | ||
35 | for (i = 0; i < lttng_dynamic_array_get_count(&src_payload->_fds); | |
36 | i++) { | |
37 | int dst_fd; | |
38 | const int src_fd = *((int *) lttng_dynamic_array_get_element( | |
39 | &src_payload->_fds, i)); | |
40 | ||
41 | dst_fd = dup(src_fd); | |
42 | if (dst_fd < 0) { | |
43 | PERROR("Failed to duplicate file descriptor while copying a payload"); | |
44 | ret = dst_fd; | |
45 | goto error; | |
46 | } | |
47 | ||
48 | ret = lttng_payload_push_fd(dst_payload, dst_fd); | |
49 | if (ret) { | |
50 | const int close_ret = close(dst_fd); | |
51 | ||
52 | if (close_ret < 0) { | |
53 | PERROR("Failed to close duplicated file descriptor while copying a payload"); | |
54 | } | |
55 | ||
56 | goto error; | |
57 | } | |
58 | } | |
59 | ||
60 | end: | |
61 | return ret; | |
62 | error: | |
63 | lttng_payload_reset(dst_payload); | |
64 | goto end; | |
65 | } | |
66 | ||
c0a66c84 JG |
67 | LTTNG_HIDDEN |
68 | void lttng_payload_reset(struct lttng_payload *payload) | |
69 | { | |
70 | if (!payload) { | |
71 | return; | |
72 | } | |
73 | ||
74 | lttng_dynamic_buffer_reset(&payload->buffer); | |
75 | lttng_dynamic_array_reset(&payload->_fds); | |
76 | } | |
77 | ||
78 | LTTNG_HIDDEN | |
79 | int lttng_payload_push_fd(struct lttng_payload *payload, int fd) | |
80 | { | |
81 | int ret; | |
82 | ||
83 | if (!payload) { | |
84 | ret = -1; | |
85 | goto end; | |
86 | } | |
87 | ||
88 | ret = lttng_dynamic_array_add_element(&payload->_fds, &fd); | |
89 | end: | |
90 | return ret; | |
91 | } |