[SOLVED] How to check if particular files from list of filenames present in directory with regex or grep in bash script

Issue

need to write a script to check if a specific files list are present or not in a directory

files in directory /dir look_like

ABC_YYYYMMDD_EF.txt
/> GHI_YYYYMMDD_LM.txt

and list has names like

l=[ABC_EF, GHI_LM,PQR_ST,..]

so have to ignore YYYYMMDD which can be anydate in this format ,can anyone tell should we use grep or regex and how
like output: \

ABC_EF   FOUND
GHI_LM   FOUND
PQR_ST   NOT FOUND

Thanks

Solution

$ cat tst.sh
#!/usr/bin/env bash

shopt -s extglob nullglob

dir="$1"

names=( ABC_EF GHI_LM PQR_ST )
for name in "${names[@]}"; do
    files=( "${dir}/${name%_*}_"+([0-9])"_${name#*_}.txt" )
    (( ${#files[@]} )) && result="" || result="NOT "
    printf '%s\t%sFOUND\n' "$name" "$result"
done

$ ls tmp
ABC_19001231_EF.txt  GHI_20200102_LM.txt

$ ./tst.sh tmp
ABC_EF  FOUND
GHI_LM  FOUND
PQR_ST  NOT FOUND

Answered By - Ed Morton

Answer Checked By - Marie Seifert (WPSolving Admin)