src/common/fs-handle.cpp

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