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OpenFile

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NAME

OpenFile - Open a file for read or write

SYNOPSIS

OpenFile filename channel [access]

DESCRIPTION

Open a file filename and return the channel id channel. By default the file is opened in "a+" mode (open for read and write and create the file if it does not already exist). The optional argument access has the same valid values as access for the Tcl open command which are:

r
Open the file for reading only; the file must already exist. This is the default value if access is not specified.
r+
Open the file for both reading and writing; the file must already exist.
w
Open the file for writing only. Truncate it if it exists. If it doesn't exist, create a new file.
w+
Open the file for reading and writing. Truncate it if it exists. If it doesn't exist, create a new file.
a
Open the file for writing only. The file must already exist, and the file is positioned so that new data is appended to the file.
a+
Open the file for reading and writing. If the file doesn't exist, create a new empty file. Set the initial access position to the end of the file.

KEYWORDS