| 1 | #!/bin/bash |
| 2 | |
| 3 | read_stdin() { |
| 4 | # Desc: Consumes stdin; outputs as stdout lines |
| 5 | # Input: stdin (consumes) |
| 6 | # Output: stdout (newline delimited) |
| 7 | # return 0 stdin read |
| 8 | # return 1 stdin not present |
| 9 | # Example: printf "foo\nbar\n" | read_stdin |
| 10 | # Depends: GNU bash (version 5.1.16), GNU Coreutils 8.32 (cat) |
| 11 | # Version: 0.1.1 |
| 12 | # Attrib: Steven Baltakatei Sandoval (2024-01-29). reboil.com |
| 13 | local input_stdin output; |
| 14 | |
| 15 | # Store stdin |
| 16 | if [[ -p /dev/stdin ]]; then |
| 17 | input_stdin="$(cat -)" || { |
| 18 | echo "FATAL:Error reading stdin." 1>&2; return 1; }; |
| 19 | else |
| 20 | return 1; |
| 21 | fi; |
| 22 | |
| 23 | # Store as output array elements |
| 24 | ## Read in stdin |
| 25 | if [[ -n $input_stdin ]]; then |
| 26 | while read -r line; do |
| 27 | output+=("$line"); |
| 28 | done < <(printf "%s\n" "$input_stdin") || { |
| 29 | echo "FATAL:Error parsing stdin."; return 1; }; |
| 30 | fi; |
| 31 | |
| 32 | # Print to stdout |
| 33 | printf "%s\n" "${output[@]}"; |
| 34 | |
| 35 | return 0; |
| 36 | }; # read stdin to stdout lines |
| 37 | remove_leading_zeroes() { |
| 38 | # Desc: Removes leading zeroes from lines |
| 39 | # Input: stdin |
| 40 | # Output: stdout |
| 41 | # Depends: BK-2020-03 read_stdin() |
| 42 | # Version: 0.0.1 |
| 43 | while read -r line; do |
| 44 | printf "%s\n" "$line" | sed -E -e 's/(^0*)([0-9].*)/\2/'; |
| 45 | done < <(read_stdin); |
| 46 | }; |
| 47 | |
| 48 | printf "00000.jpg\n0001.jpg\n2.jpg\n000003.jpg\n0010.jpg\n"; |
| 49 | printf "========================\n"; |
| 50 | printf "00000.jpg\n0001.jpg\n2.jpg\n000003.jpg\n0010.jpg\n" | remove_leading_zeroes; |
| 51 | |