Show progress of some command you forgot to pipe through pv

progress.sh

#!/bin/bash

### Save as "/usr/local/bin/progress" and chmod +x, then:
#
# $ progress ~/huge-file.tar.bz2
# $ progress -p $(pidof bzcat)
# $ progress                        # progress of all open files, shows e.g. how far mpd is through your song :P
#
# source: http://stackoverflow.com/a/238140/69663

set -e -u -o pipefail

exec lsof -o0 -o "$@" |
awk '$4 ~ /^[0-9]+r$/ && $5 == "REG" && $7 ~ /^0t/ {
    offset = substr($7, 3)
    fname = $0; sub(/([^ \t]+[ \t]+){8}/,"",fname) # $9 to NF, but keeping IFS
    "stat -c %s '\''" fname "'\''" | getline
    len = $0
    if (len) {
        print fname, offset / len * 100 "%"
    }
}' || echo "lsof returned $? for args '-o0 -o $@'" >&2