dio_open

Description

resource dio_open ( string filename, int flags [, int mode])

dio_open() opens a file and returns a new file descriptor for it, or -1 if any error occurred. If flags is O_CREAT, optional third parameter mode will set the mode of the file (creation permissions). The flags parameter can be one of the following options:

• O_RDONLY - opens the file for read access

• O_WRONLY - opens the file for write access

• O_RDWR - opens the file for both reading and writing

The flags parameter can also include any combination of the following flags:

• O_CREAT - creates the file, if it doesn't already exist

• O_EXCL - if both, O_CREAT and O_EXCL are set, dio_open() fails, if file already exists

• O_TRUNC - if file exists, and its opened for write access, file will be truncated to zero length.

• O_APPEND - write operations write data at the end of file

• O_NONBLOCK - sets non blocking mode