2021-07-29 00:37:35 -07:00
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#!/usr/bin/env sh
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2021-07-31 16:15:27 -07:00
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# backup, timestamped
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2021-07-29 00:37:35 -07:00
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# YES_ZSH
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2021-07-29 05:44:12 -07:00
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# YES_BASH
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# YES_DASH
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2021-09-23 06:48:05 -07:00
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# YES_ASH
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2021-07-29 00:37:35 -07:00
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2021-07-30 19:41:16 -07:00
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baks() { ### @-
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2021-08-01 07:58:21 -07:00
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### backup files by copying each and appending *the current* date-time,
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### irrespective of when the files were modified or created.
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###
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### ```
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### $ touch -d '2001-12-25 16:30:00' butts
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### $ baks butts
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### $ baks butts
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### $ ls -l
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### total 0
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### -rw-r--r-- 1 notwa None 0 Dec 25 2001 butts
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### -rw-r--r-- 1 notwa None 0 Dec 25 2001 butts.21-08-01_14-54-07.bak
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### -rw-r--r-- 1 notwa None 0 Dec 25 2001 butts.21-08-01_14-54-09.bak
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### ```
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2022-03-06 13:12:17 -08:00
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local ret=0 fp=
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2021-07-29 00:37:35 -07:00
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for fp; do
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local now="$(date -u '+%y-%m-%d_%H-%M-%S')"
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local bak="$fp.$now.bak"
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if [ -s "$bak" ]; then
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2021-07-29 05:44:12 -07:00
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#note "how in the hell?" "$bak" "already exists"
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printf "%s %s %s\n" "how in the hell?" "$bak" "already exists"
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2021-07-29 00:37:35 -07:00
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ret=1
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fi
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cp -p "$fp" "$bak" || ret=1
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done
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return $ret
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}
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2021-08-02 14:08:00 -07:00
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[ -n "${preload+-}" ] || . ~/sh/preload || exit 2
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2021-08-02 13:48:46 -07:00
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eval ${preload:-preload} note
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[ -n "${preload+-}" ] || baks "$@"
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