The expect and reply strings may contain escape sequences. All of
the sequences are legal in the reply string. Many are legal in
the expect. Those which are not valid in the expect sequence are
so indicated.
'' Expects or sends a null string. If you send a null string
then it will still send the return character. This
sequence may either be a pair of apostrophe or quote
characters.
\b represents a backspace character.
\c Suppresses the newline at the end of the reply string.
This is the only method to send a string without a
trailing return character. It must be at the end of the
send string. For example, the sequence hello\c will simply
send the characters h, e, l, l, o. (not valid in expect.)
\d Delay for one second. The program uses sleep(1) which will
delay to a maximum of one second. (not valid in expect.)
\K Insert a BREAK (not valid in expect.)
\n Send a newline or linefeed character.
\N Send a null character. The same sequence may be
represented by \0. (not valid in expect.)
\p Pause for a fraction of a second. The delay is 1/10th of a
second. (not valid in expect.)
\q Suppress writing the string to the SYSLOG file. The string
?????? is written to the log in its place. (not valid in
expect.)
\r Send or expect a carriage return.
\s Represents a space character in the string. This may be
used when it is not desirable to quote the strings which
contains spaces. The sequence 'HI TIM' and HI\sTIM are the
same.
\t Send or expect a tab character.
\T Send the phone number string as specified with the -T
option (not valid in expect.)
\U Send the phone number 2 string as specified with the -U
option (not valid in expect.)
\\ Send or expect a backslash character.
\ddd Collapse the octal digits (ddd) into a single ASCII
character and send that character. (some characters are
not valid in expect.)
^C Substitute the sequence with the control character
represented by C. For example, the character DC1 (17) is
shown as ^Q. (some characters are not valid in expect.)
