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  1. testfunc() {
  2. printf -v args_str '%q ' "$@"
  3. while (( $# )) && [[ $1 = -* ]]; do
  4.   arg=${1#-}; shift
  5.   while [[ $arg ]]; do
  6.     case $arg in
  7.       l*) flag_l=1; arg=${arg#l};;
  8.       u*) flag_u=1; arg=${arg#u};;
  9.       w*)
  10.         flag_w=1
  11.         rest=${arg#w}
  12.         if [[ -z $rest ]]; then
  13.           arg=$1; shift; rest=$arg
  14.         fi
  15.         if [[ $rest =~ ^([[:digit:]]+)(.*) ]]; then
  16.           w_value=${BASH_REMATCH[1]}
  17.           arg=${BASH_REMATCH[2]}
  18.         else
  19.           echo "ERROR: -w not followed with a number" >&2
  20.           exit 1
  21.         fi
  22.         ;;
  23.       *) echo "Unrecognized flag: $arg" >&2; exit 1;;
  24.     esac
  25.   done
  26. done
  27.  
  28. echo "After parsing $args_str"
  29. echo "flag_w = ${flag_w:-0}"
  30. echo "flag_l = ${flag_l:-0}"
  31. echo "flag_u = ${flag_u:-0}"
  32. echo "w_value = ${w_value:-0}"
  33. }
  34.  
  35. testfunc -w42l
  36. testfunc -w 42 -l
Success #stdin #stdout 0.01s 5556KB
comments (?)
stdin 
Standard input is empty
stdout 
After parsing -w42l 
flag_w = 1
flag_l = 1
flag_u = 0
w_value = 42
After parsing -w 42 -l 
flag_w = 1
flag_l = 1
flag_u = 0
w_value = 42
https://ideone.com/eDrlHd
language:
Bash (bash 5.0.3)
created:
3 years ago
visibility:
public

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