list --full-time with ls and a file list

Question

I gathered a list of zip in a remote disk using find /path/ -name *.zip > ~/ziplist.txt.

~/ziplist.txt look like this :

./path/to/the/file.zip
./path/to/the/file2.zip
./path/to/the/file3.zip
./path/to/the/very/nice/file.zip

I filtered this list using grep and now that I have to correct list in a .txt file, I would like to provide it to ls x --full-time to gather their timestamp (x being the list of files).

Is it possible ?

I tried something like this : for f in tmp.txt do echo $( ls $f --full-time) done

EDIT : anothier thing I tried is : cat tmp.txt | sed- "s/\(.*\)/'\1'/" ; ls --full-time $(!!) The sed part is need since obviously there are space in file names...Otherwise, if files don't have spaces, this $(!!) works just fine.

A solution that could work I guess is also ls -R --full-time | grep "what I want" > listfile.txt but I think this will take a very long time to run. Having small steps is essential so I can check the list length for example, and because my disk access can be closed sometimes. Running find already took me one hour.

Note : I'm on windows10 and use git bash to run commands, so I can't run elaborate .sh scripts. I would prefer a single terminal entry to run it. I know, not the best configuration.

Answer 1

You can embed the content of a file directly into the command.

$: ls --full-time $(<~/ziplist.txt)

In this case, do NOT quote the file insertion, as that will treat the entire content of the file as a single filename.

To read them individually, don't read lines with for loops.

while read -r file; do ls --full-time "$file"; done < ~/ziplist.txt

Slower, but lets you quote the file names to avoid issues such as embedded spaces.

Before you spend too much time on that, please read why you should not parse ls output.

c.f. stat

mapfile -t lst < ~/ziplist.txt && stat -c "%x %n" "${lst[@]}"
2021-06-18 13:44:18.351339200 -0500 dev
2021-10-21 20:50:20.649098700 -0500 sts
2021-10-21 09:11:37.398341900 -0500 file
2021-10-25 08:13:03.788650200 -0500 a b c

Note that dev is a directory here, and a b c has embedded spaces.
X, Y, and Z report access, modification, and status change, respectively, uppercase in seconds since the epoch, lowercase in human-parsed date/time with fractional seconds and timezone info.