Contents

Adopting Swift File Options

Migrate existing C code to Swift, using the file-operation options provided by the System module.

Overview

The C options for how to open a file map to Swift as follows:

O_RDONLY ⟶ readOnly
O_WRONLY ⟶ writeOnly
O_RDWR ⟶ readWrite

The C constants for specifying options when opening a file map to Swift as follows:

O_NONBLOCK ⟶ nonBlocking
O_APPEND ⟶ append
O_CREAT ⟶ create
O_TRUNC ⟶ truncate
O_EXCL ⟶ exclusiveCreate
O_SHLOCK ⟶ sharedLock
O_EXLOCK ⟶ exclusiveLock
O_NOFOLLOW ⟶ noFollow
O_SYMLINK ⟶ symlink
O_EVTONLY ⟶ eventOnly
O_CLOEXEC ⟶ closeOnExec

The C constants for specify seek offsets map to Swift as follows:

SEEK_SET ⟶ start
SEEK_CUR ⟶ current
SEEK_END ⟶ end
SEEK_HOLE ⟶ nextHole
SEEK_DATA ⟶ nextData

See Also

Adopting System