diff options
Diffstat (limited to 'kernel/fs/vnode_specials.c')
| -rw-r--r-- | kernel/fs/vnode_specials.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/kernel/fs/vnode_specials.c b/kernel/fs/vnode_specials.c index cd21549..fb6df0b 100644 --- a/kernel/fs/vnode_specials.c +++ b/kernel/fs/vnode_specials.c @@ -110,8 +110,20 @@ static long special_file_stat(vnode_t *file, stat_t *ss) static ssize_t chardev_file_read(vnode_t *file, size_t pos, void *buf, size_t count) { - NOT_YET_IMPLEMENTED("VFS: chardev_file_read"); - return 0; + // NOT_YET_IMPLEMENTED("VFS: chardev_file_read"); + + // check if the vnode represetns a chardev + if (file->vn_dev.chardev == NULL) + { + return -ENXIO; + } + + // Unlock the file and call read + vunlock(file); + ssize_t ret = file->vn_dev.chardev->cd_ops->read(file->vn_dev.chardev, pos, buf, count); + vlock(file); + + return ret; } /* @@ -125,8 +137,20 @@ static ssize_t chardev_file_read(vnode_t *file, size_t pos, void *buf, static long chardev_file_write(vnode_t *file, size_t pos, const void *buf, size_t count) { - NOT_YET_IMPLEMENTED("VFS: chardev_file_write"); - return 0; + // NOT_YET_IMPLEMENTED("VFS: chardev_file_write"); + + // check if the vnode represents a chardev + if (file->vn_dev.chardev == NULL) + { + return -ENXIO; + } + + // Unlock the file and call write + vunlock(file); + long ret = file->vn_dev.chardev->cd_ops->write(file->vn_dev.chardev, pos, buf, count); + vlock(file); + + return ret; } /* |