io: Input / output, file management.
Functions

io.open file (string path, string mode)
 Open file in any way.

io.open file (string path)
 Open file in read mode.

io.close nil (fd file)
 Closes a file.

io.read string (file fd, string format)
 Reads data from a file.

io.read string (fd file)
 Reads a line from a file.

io.lines function (string path)
 Iterator function, line by line.

nil io.write (fd file, ....)
 Write data to a file.

io.flush nil (fd file)
 Save the data written to the file.

io.seek nil (file fd, string where)
 Sets or returns the current position of a file pointer.

io.seek nil (file fd, string where, int offset)
 Move the pointer position in a file.

io.setvbuf nil (file fd, string mode)
 Sets the mode on how the data will be written to a file.
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Function Documentation

io.open file (string path, string mode)
 Open file in any way.
 Notes:
 If you open in read / write mode, it is recommended to write immediately after reading, or vice versa, it would be filing a seek involved.
 Parameters:
 path The path of the file to open.
 One mode of the following:
 "R" - read mode. (Default)
 "W" - write mode.
 "A" - adding mode.
 "R +" - Read / Write. Pointer to the beginning, pre-existing data is preserved.
 "W +" - Read / Write. Pointer to the beginning, pre-existing data are removed.
 "A +" - Read / Write. Pointer to the end of the file, pre-existing data is preserved.
 "Rb" - Reading binary data (data files).
 "Wb" - Writing, binary data (data files).
 "Ab" - Addition, binary data (data files).
 Returns:
 A file descriptor, or nil on error, more error message.
 Example:
 corutinas.lua.

io.open file (string path)
 Open file in read mode.
 Parameters:
 path The path of the file to open.
 Returns:
 A file descriptor, or nil on error, more error message.

io.close nil (fd file)
 Closes a file.
 Parameters:
 fd file descriptor previously opened.
 Returns:
 Nothing.
 Example:
 corutinas.lua.

io.read string (file fd, string format)
 Reads data from a file.
 Parameters:
 fd file descriptor previously opened.
 data format read type, one of the following:
 "* N" - Read a number. Using this format type returns a number, not string.
 "* A" - Read the rest of the entire file, starting from the current position.
 "* L" - Read the next line. This is the default format.
 A number - If you specify a number, this number of bytes read or characters.
 Returns:
 The data read, or nil if data could not be read or there are no more data.

io.read string (fd file)
 Reads a line from a file.
 Parameters:
 fd file descriptor previously opened.
 Returns:
 The data read, or nil if data could not be read or there are no more data.

io.lines function (string path)
 Iterator function, line by line.
 Parameters:
 path The path of the file to open.
 Returns:
 An iterator function for use in construction type for xxx in io.lines ("map")

nil io.write (fd file, ....)
 Write data to a file.
 Parameters:
 fd file descriptor previously opened.
 ... Variable amount of extra arguments, which may be numbers or strings.
 Returns:
 Nothing.
 Example:
 corutinas.lua.

io.flush nil (fd file)
 Save the data written to the file.
 Parameters:
 fd file descriptor previously opened.
 Returns:
 Nothing.
 Example:
 corutinas.lua.

io.seek nil (file fd, string where)
 Sets or returns the current position of a file pointer.
 Parameters:
 fd file descriptor previously opened.
 where one of the following:
 "Set" - Sets the start position, and returns 0.
 "Cur" - Returns the current position from the beginning of the file.
 "End" - Sets the end position, and returns the file size.
 Returns:
 Depends on its argument.

io.seek nil (file fd, string where, int offset)
 Move the pointer position in a file.
 For example, if used io.seek (file, "set", 20), place the pointer 20 bytes away from the start. (You will skip the first 20 bytes).
 Parameters:
 fd file descriptor previously opened.
 where one of the following:
 "Set" - From the beginning.
 "Cur" - From the current position.
 "End" - From the end of the file.
 Scrolling to consider, from "where".
 Returns:
 Returns the position where the pointer has been told from the beginning of the file.

io.setvbuf nil (file fd, string mode)
 Sets the mode on how the data will be written to a file.
 To ensure that the data is written, and do not take into account the write buffers, it is correct to use io.flush (file);
 Parameters:
 fd file descriptor previously opened.
 One of the following manner:
 "No" - no buffer, the data is written immediately.
 "Full" - only write when filling the write buffer.
 "Line" - only write each time it reaches a new line "\ n".
 Returns:
 Nothing.