06-20-2007
I am still getting error message as -
'There are extra characters at the end of substitute command'.
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read(n) Tcl Built-In Commands read(n)
__________________________________________________________________________________________________________________________________________________
NAME
read - Read from a channel
SYNOPSIS
read ?-nonewline? channelId
read channelId numChars
_________________________________________________________________
DESCRIPTION
In the first form, the read command reads all of the data from channelId up to the end of the file. If the -nonewline switch is specified
then the last character of the file is discarded if it is a newline. In the second form, the extra argument specifies how many characters |
to read. Exactly that many characters will be read and returned, unless there are fewer than numChars left in the file; in this case all |
the remaining characters are returned. If the channel is configured to use a multi-byte encoding, then the number of characters read may |
not be the same as the number of bytes read. |
If channelId is in nonblocking mode, the command may not read as many characters as requested: once all available input has been read, the |
command will return the data that is available rather than blocking for more input. If the channel is configured to use a multi-byte |
encoding, then there may actually be some bytes remaining in the internal buffers that do not form a complete character. These bytes will |
not be returned until a complete character is available or end-of-file is reached. The -nonewline switch is ignored if the command returns
before reaching the end of the file.
Read translates end-of-line sequences in the input into newline characters according to the -translation option for the channel. See the
fconfigure manual entry for a discussion on ways in which fconfigure will alter input.
SEE ALSO
file(n), eof(n), fblocked(n), fconfigure(n)
KEYWORDS
blocking, channel, end of line, end of file, nonblocking, read, translation, encoding
Tcl 8.1 read(n)