open

Opens a file indicated by a filename.

Mode is used to determine the file access mode.

Mode:	Meaning:	Explanation:	File already exists:	File does not exist:
"r"	read	Open a file for reading	read from start	failure to open
"w"	write	Create a file for writing	destroy contents	create new
"a"	append	Append to a file	write to end	create new
"r+"	read extended	Open a file for read/write	read from start	error
"w+"	write extended	Create a file for read/write	destroy contents	create new
"a+"	append extended	Open a file for read/write	write to end	create new

File access mode flag "b" can optionally be specified to open a file in binary mode. This flag has effect only on Windows systems.

On the append file access modes, data is written to the end of the file regardless of the current position of the file position indicator.

Example: Read chars from a stream:

public static int main (string[] args) {
	// Opens "foo.txt" for reading ("r")
	FileStream stream = FileStream.open ("filestream.vala", "r");
	assert (stream != null);

	// buffered:
	char buf[100];
	while (stream.gets (buf) != null) {
		print ((string) buf);
	}

	return 0;
}

valac --pkg glib-2.0 GLib.FileStream.gets.vala

Parameters:

path	file name to associate the file stream to
mode	character string determining file access mode

Returns:

opened file stream on success, null on failure