Bob Proulx wrote: > When I don't want to send mail I simply don't send mail. I guess it > is a little bit more work but I have done it so many times that I > don't even think about it anymore. I save the output to a temporary > file and then check to see if the file is empty before sending it off > in email.
Here is what I normally do. Here is a skeleton script that creates a
temporary file, redirects all output there, then if there is output it
emails it off. There are many ways to do this and I tinker it as
needed.
Bob
#!/bin/sh
unset tmpfile
cleanup() {
test -n "$tmpfile" && rm -f "$tmpfile"
}
trap "cleanup" EXIT
# This next is special handling needed for dash only.
trap "cleanup; trap - HUP; kill -HUP $$" HUP
trap "cleanup; trap - INT; kill -INT $$" INT
trap "cleanup; trap - QUIT; kill -QUIT $$" QUIT
trap "cleanup; trap - TERM; kill -TERM $$" TERM
# End dash special trap handling.
tmpfile=$(mktemp) || exit 1
exec </dev/null >$tmpfile 2>&1
echo "...do stuff here that may make output..."
echo "...do stuff here that may make output..."
echo "...do stuff here that may make output..."
exec >/dev/null 2>&1 # close previous output file
if [ -s "$tmpfile" ]; then
# There was output. Mail it.
mailx -s "output from doing stuff" "$(whoami)" < "$tmpfile"
fi
exit 0
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