| 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 <common/fs-handle-internal.h> |
| 9 | #include <common/fs-handle.h> |
| 10 | #include <common/readwrite.h> |
| 11 | |
| 12 | LTTNG_HIDDEN |
| 13 | int fs_handle_get_fd(struct fs_handle *handle) |
| 14 | { |
| 15 | return handle->get_fd(handle); |
| 16 | } |
| 17 | |
| 18 | LTTNG_HIDDEN |
| 19 | void fs_handle_put_fd(struct fs_handle *handle) |
| 20 | { |
| 21 | return handle->put_fd(handle); |
| 22 | } |
| 23 | |
| 24 | LTTNG_HIDDEN |
| 25 | int fs_handle_unlink(struct fs_handle *handle) |
| 26 | { |
| 27 | return handle->unlink(handle); |
| 28 | } |
| 29 | |
| 30 | LTTNG_HIDDEN |
| 31 | int fs_handle_close(struct fs_handle *handle) |
| 32 | { |
| 33 | return handle->close(handle); |
| 34 | } |
| 35 | |
| 36 | LTTNG_HIDDEN |
| 37 | ssize_t fs_handle_read(struct fs_handle *handle, void *buf, size_t count) |
| 38 | { |
| 39 | ssize_t ret; |
| 40 | const int fd = fs_handle_get_fd(handle); |
| 41 | |
| 42 | if (fd < 0) { |
| 43 | ret = -1; |
| 44 | goto end; |
| 45 | } |
| 46 | |
| 47 | ret = lttng_read(fd, buf, count); |
| 48 | fs_handle_put_fd(handle); |
| 49 | end: |
| 50 | return ret; |
| 51 | } |
| 52 | |
| 53 | LTTNG_HIDDEN |
| 54 | ssize_t fs_handle_write(struct fs_handle *handle, const void *buf, size_t count) |
| 55 | { |
| 56 | ssize_t ret; |
| 57 | const int fd = fs_handle_get_fd(handle); |
| 58 | |
| 59 | if (fd < 0) { |
| 60 | ret = -1; |
| 61 | goto end; |
| 62 | } |
| 63 | |
| 64 | ret = lttng_write(fd, buf, count); |
| 65 | fs_handle_put_fd(handle); |
| 66 | end: |
| 67 | return ret; |
| 68 | } |
| 69 | |
| 70 | LTTNG_HIDDEN |
| 71 | int fs_handle_truncate(struct fs_handle *handle, off_t offset) |
| 72 | { |
| 73 | int ret; |
| 74 | const int fd = fs_handle_get_fd(handle); |
| 75 | |
| 76 | if (fd < 0) { |
| 77 | ret = -1; |
| 78 | goto end; |
| 79 | } |
| 80 | |
| 81 | ret = ftruncate(fd, offset); |
| 82 | fs_handle_put_fd(handle); |
| 83 | end: |
| 84 | return ret; |
| 85 | } |
| 86 | |
| 87 | LTTNG_HIDDEN |
| 88 | off_t fs_handle_seek(struct fs_handle *handle, off_t offset, int whence) |
| 89 | { |
| 90 | off_t ret; |
| 91 | const int fd = fs_handle_get_fd(handle); |
| 92 | |
| 93 | if (fd < 0) { |
| 94 | ret = -1; |
| 95 | goto end; |
| 96 | } |
| 97 | |
| 98 | ret = lseek(fd, offset, whence); |
| 99 | fs_handle_put_fd(handle); |
| 100 | end: |
| 101 | return ret; |
| 102 | } |