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rc/sh/baks

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#!/usr/bin/env sh
# backup, timestamped
# YES_ZSH
# YES_BASH
# YES_DASH
: $((SOURCING+=1))
#. ~/sh/note # FIXME: don't do this?
: $((SOURCING-=1))
baks() { ### @-
local ret=0
for fp; do
local now="$(date -u '+%y-%m-%d_%H-%M-%S')"
local bak="$fp.$now.bak"
if [ -s "$bak" ]; then
#note "how in the hell?" "$bak" "already exists"
printf "%s %s %s\n" "how in the hell?" "$bak" "already exists"
ret=1
fi
cp -p "$fp" "$bak" || ret=1
done
return $ret
}
[ "${SOURCING:-0}" -gt 0 ] || baks "$@"