The distprompter Shell Script
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#! /bin/sh
# $Id: distprompter,v 1.9 92/08/03 07:31:17 jerry book2 $
### distprompter - replaces "prompter" for MH "dist" command
### Usage (in .mh_profile): dist: -editor distprompter
##
## BY DEFAULT, THE MH dist COMMAND USES prompter TO EDIT THE DRAFT
## MESSAGE. FOR dist, THAT'S NOT A GREAT CHOICE BECAUSE:
## - IF YOU ACCIDENTALLY TYPE A BODY, THE MESSAGE CAN'T BE SENT
## - YOU ALWAYS HAVE TO PRESS CONTROL-D TO SKIP THE BODY
##
## distprompter IS AN EDITOR DESIGNED FOR dist. IT READS THE
## EMPTY HEADER THAT dist GIVES IT, LINE BY LINE. IF A COMPONENT
## IS EMPTY, IT PROMPTS YOU. IF A COMPONENT IS FINISHED, IT DOESN'T
## PROMPT. IF A COMPONENT IS ILLEGAL (NOT Resent-xxx:), IT COMPLAINS.
## WHEN IT'S READ THE HEADER, IT EXITS; YOU DON'T NEED CONTROL-D.
##
## NOTE TO HACKERS: TABSTOPS ARE SET AT 4 IN THIS CODE
myname="`basename $0`"
err=/tmp/DISTPRe$$ header=/tmp/DISTPRd$$
> $header
chmod 600 $header
# UNCOMMENT THE RIGHT LINE FOR YOUR UNIX:
# echo="echo -n" nnl= # BSD
# echo=echo nnl="\c" # SYSV
echo="echo -n" nnl= PATH=/usr/bin:$PATH; export PATH # SunOS
stat=1 # DEFAULT EXIT STATUS; RESET TO 0 FOR NORMAL EXITS
trap 'rm -f $header $err; exit $stat' 0
trap 'echo "$myname: Interrupt! Cleaning up..." 1>&2; exit' 1 2 15
if [ ! -w "$1" -o -z "$1" ]
then
echo 1>&2 "$myname: quitting: missing or unwritable draft
'$1'"
exit
fi
# READ DRAFT (A COPY OF distcomps FILE) LINE-BY-LINE.
# ACT LIKE prompter, BUT EXIT AFTER WE'VE READ DRAFT FILE
# (WHEN YOU USE dist, THE DRAFT FILE IS ONLY A HEADER).
# read AT TOP OF LOOP GETS STDIN (FD 0), SO SAVE FD 0 NOW:
exec 4<&0 # SAVE ORIGINAL STDIN (USUALLY TTY) AS FD 4
while read label line
do
case "$label" in
[Rr]esent-?*:)
case "$line" in
?*) # SHOW LINE ON SCREEN AND PUT INTO HEADER FILE:
echo "$label $line"
echo "$label $line" 1>&3
;;
*) # FILL IT IN OURSELVES:
$echo "$label $nnl"
exec 5<&0 # SAVE DRAFT FILE FD; DO NOT CLOSE!
exec 0<&4 # RESTORE ORIGINAL STDIN
read ans
exec 0<&5 # RECONNECT DRAFT FILE TO STDIN
case "$ans" in
"") ;; # EMPTY; DO NOTHING
*) echo "$label $ans" 1>&3 ;;
esac
;;
esac
;;
""|---*) # END OF HEADER
echo "-------" 1>&3
break # PROBABLY NOT NEEDED...
;;
*) echo "$myname: illegal header component
'$label $line'" 1>&2
break
;;
esac
done <$1 2>$err 3>$header
# IF THE ERROR FILE HAS SOMETHING IN IT, SHOW IT AND QUIT:
if [ -s $err ]
then
/bin/cat $err 1>&2
echo "$myname: quitting." 1>&2
else
if /bin/cp $header $1
then stat=0
else echo "$myname: can't replace draft '$1'?" 1>&2
fi
fi
exit
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