Emacs

$ emacs --insert <(echo 'hello world')
$ emacs --insert <(cat ~/.bash_profile)
$ emacs --insert <(bin/rails routes --controller=articles)

#!/bin/bash -e

#
# Example usage:
#   curl http://example.net/mbox | with-temp-file mutt -f
#   curl http://example.net/     | with-temp-file browser
#   curl http://example.net/     | with-temp-file emacs
#

test $# -gt 0 ||
exit 1

f="`mktemp -t with-temp-file.XXXXXX`"

trap 'rm -f "$f"' EXIT

cat >"$f"

# less(1)-style tty grabber.
exec </dev/tty || true

# subshell to avoid "w-t-f unset f" not reaping
("$@" "$f")