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fix nasty bugs in bak

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This commit is contained in:
Connor Olding 2021-08-01 08:03:41 -07:00
parent 19e12cee88
commit 549f0b3a00
1 changed files with 9 additions and 8 deletions
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17
sh/bak
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@ -8,21 +8,22 @@ bak() { ### @-
### this calls itself recursively to avoid clobbering existing backups.
###
### ```
### % touch -d '2001-12-25 16:30:00' butts
### % bak butts
### % touch butts
### % bak butts
### % ls -l
### $ touch -d '2001-12-25 16:30:00' butts
### $ bak butts
### $ touch butts
### $ bak butts
### $ ls -l
### total 0
### -rw-r--r-- 1 notwa None 0 Aug 1 07:56 butts
### -rw-r--r-- 1 notwa None 0 Dec 25 2001 butts.bak
### -rw-r--r-- 1 notwa None 0 Aug 1 08:02 butts
### -rw-r--r-- 1 notwa None 0 Aug 1 08:02 butts.bak
### -rw-r--r-- 1 notwa None 0 Dec 25 2001 butts.bak.bak
### ```
[ $# -gt 0 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
local ret=0
local f
for f; do
if [ -e "$f.bak" ]; then
bak "$f.bak" || ret=1
bak "$f.bak" || { ret=1; continue; }
fi
cp -p "$f" "$f.bak" || ret=1
done