os/open

    cfunction
    src/core/os.c on line 2583, column 1

    (os/open path &opt flags mode)

    Create a stream from a file, like the POSIX open system call. 
    Returns a new stream. `mode` should be a file mode as passed to 
    `os/chmod`, but only if the create flag is given. The default mode 
    is 8r666. Allowed flags are as follows:

    $*$ :r $-$ open this file for reading
    $*$ :w $-$ open this file for writing
    $*$ :c $-$ create a new file (O_CREATE)
    $*$ :e $-$ fail if the file exists (O_EXCL)
    $*$ :t $-$ shorten an existing file to length 0 (O_TRUNC)

    Posix-only flags:

    $*$ :a $-$ append to a file (O_APPEND)
    $*$ :x $-$ O_SYNC
    $*$ :C $-$ O_NOCTTY

    Windows-only flags:

    $*$ :R $-$ share reads (FILE_SHARE_READ)
    $*$ :W $-$ share writes (FILE_SHARE_WRITE)
    $*$ :D $-$ share deletes (FILE_SHARE_DELETE)
    $*$ :H $-$ FILE_ATTRIBUTE_HIDDEN
    $*$ :O $-$ FILE_ATTRIBUTE_READONLY
    $*$ :F $-$ FILE_ATTRIBUTE_OFFLINE
    $*$ :T $-$ FILE_ATTRIBUTE_TEMPORARY
    $*$ :d $-$ FILE_FLAG_DELETE_ON_CLOSE
    $*$ :b $-$ FILE_FLAG_NO_BUFFERING