bash read and field separator
On 07/12/2022 19:18, Greg Wooledge wrote:
rlart() {
local day time path
find "${1:-.}" -type f -printf '%T@ %TY-%Tm-%Td %TT %p\0' |
sort -zn |
while read -rd '' _ day time path; do
printf '%s %s %s\n' "$day" "${time%.*}" "$path"
done
}
I was not aware of the "read -d ''" feature that allows to work with
null-terminated records, so thank you for the hint. However the read
command strips leading and trailing spaces and newlines from path. What
is the best way to preserve them? I have tried slash (a character
disallowed in file names) instead of space as field separator:
printf 'a///1/1\n\000b/ 2/\000c/3/\000d/4//\000' |
while IFS='/' read -r -d '' num path ; do
printf '%s %q\n' "$num" "$path" ;
done
a $'//1/1\n'
b \ 2
c 3
d 4//
No problem with spaces, leading "//" are preserved, but single trailing
slash is removed after "3".
Another question is if "$@" instead of "${1:-.}" may cause any problem.
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