src/common/fs-handle.c

   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 }