As article
51.5
explains, the files made by the script program can have stray
control characters in them.
The shell script called script.tidy can clean them up.
Dan Bernstein wrote it and posted it to Usenet; I made a few changes.
It reads from files or standard input; it writes to standard output.
script.tidy uses the
sed (34.24)
substitute command to remove CTRL-m (RETURN) characters from
the ends of lines.
It uses the sed
test command (34.20)
to repeat a series of commands that delete a character followed by
CTRL-h (BACKSPACE).
If you use DELETE as your
erase character (5.9),
change the script to eat DELETE instead of BACKSPACE.
script.tidy uses a
trick (45.35)
with echo and tr to store the control characters in shell
variables.
Because the sed script has
doublequotes (8.14)
around it, the shell variables are substituted in the right places
before the shell starts sed.
eval
exec
|
#!/bin/sh
# Public domain.
# Put CTRL-M in $m and CTRL-H in $b.
# Change \010 to \177 if you use DEL for erasing.
eval `echo m=M b=H | tr 'MH' '\015\010'`
exec sed "s/$m\$//
:x
s/[^$b]$b//
t x" $* |
|---|
You can also hack the sed script in script.tidy to delete
some of your terminal's
escape sequences (5.8);
article
41.11
explains how to find these sequences.
(A really automated script.tidy would read your termcap or
terminfo entry and look for all those escape sequences in the
script file.)
