• bizdelnick@lemmy.ml
      11 months

      Or, alternatively, [[:digit:]], and dont’ forget to add a quntifier + to match multiple digits. See documentaion for details.

      awk '/^\/dev\/loop[[:digit:]]+/{print}'
  • learnbyexample@programming.devEnglish
    11 months

    Regex syntax and features vary between implementations. \d isn’t supported by BRE/ERE flavors.

    GNU grep supports PCRE, so you can use grep -oP '/dev/loop\d' or grep -o '/dev/loop[0-9]' if you are matching only one digit character.

    • 4am@lemm.ee
      11 months

      I wish there was one single unifying regex standard.

      (obligatory xkcd in 3…2…)

  • mmmm@sopuli.xyz
    11 months

    Not sure if I’m understanding, but can’t you just pipe the whole thing to awk and capture the first field? Like

    echo "/dev/loop0: [2081]:64 (/a/path/to/afile.dat)" | awk -F: '{print $1}'

    Which would print

    /dev/loop0

    • lungdart@lemmy.ca
      11 months

      That would also print the colon

      Edit: missed the separator token. Sorry guys