Recursively look for files with a specific extension

Question

I m trying to find all files with a specific extension in a directory and its subdirectories with my bash  Latest Ubuntu LTS Release    This is what s written in a script file      bin bash  directory   home flip Desktop  suffix  in   browsefolders      for i in   1        do     echo  dir   directory      echo  filename   i          echo   i         extension  echo   i    cut -d    -f2      echo  Erweiterung  extension      if       -f   i     then                  if    extension     suffix    then             echo   i ends with  in           else             echo   i does NOT end with  in          fi     elif   -d   i     then       browsefolders   i      fi   done   browsefolders    directory    Unfortunately  when I start this script in terminal  it says      29  in  unexpected operator    with  extension instead of  in    What s going on here  where s the error  But this curly brace

User · Answer

The syntax I use is a bit different than what  Matt suggested    find  directory -type f -name    in    it s one less keystroke

User · Answer

find   PWD  -type f -name    in

User · Answer

Though using find command can be useful here  the shell itself provides options to achieve this requirement without any third party tools  The bash shell provides an extended glob support option using which you can get the file names under recursive paths that match with the extensions you want   The extended option is extglob which needs to be set using the shopt option as below  The options are enabled with the -s support and disabled with he -u flag  Additionally you could use couple of options more i e  nullglob in which an unmatched glob is swept away entirely  replaced with a set of zero words  And globstar that  allows to recurse through all the directories  shopt -s extglob nullglob globstar   Now all you need to do is form the glob expression to include the files of a certain extension which you can do as below  We use an array to populate the glob results because when quoted properly and expanded  the filenames with special characters would remain intact and not get broken due to word-splitting by the shell    For example to list all the   csv files in the recursive paths   fileList       csv    The option    is to recurse through the sub-folders and   csv is glob expansion to include any file of the extensions mentioned  Now for printing the actual files  just do  printf   s n     fileList        Using an array and doing a proper quoted expansion is the right way when used in shell scripts  but for interactive use  you could simply use ls with the glob expression as   ls -1 --      csv   This could very well be expanded to match multiple files i e  file ending with multiple extension  i e  similar to adding multiple flags in find command   For example consider a case of needing to get all recursive image files i e  of extensions   gif    png and   jpg  all you need to is  ls -1 --        jpg   gif   png    This could very well be expanded to have negate results also  With the same syntax  one could use the results of the glob to exclude files of certain type  Assume you want to exclude file names with the extensions above  you could do  excludeResults    excludeResults         jpg   gif   png   printf   s n     excludeResults        The construct     is a negate operation to not include any of the file extensions listed inside and   is an alternation operator just as used in the Extended Regular Expressions library to do an OR match of the globs   Note that these extended glob support is not available in the POSIX bourne shell and its purely specific to recent versions of bash  So if your are considering portability of the scripts running across POSIX and bash shells  this option wouldn t be right

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for file in    LOCATION VAR     zip do   echo   file  done

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Without using find   du -a  directory   awk   print  2     grep    in

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There s a   missing after browsefolders    All  in should be  suffix The line with cut gets you only the middle part of front middle extension  You should read up your shell manual on   varname  pattern  and friends    I assume you do this as an exercise in shell scripting  otherwise the find solution already proposed is the way to go   To check for proper shell syntax  without running a script  use sh -n scriptname

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find  directory  -type f -name    extension    Example  To find all csv files in the current directory and its sub-directories  use   find   -type f -name    csv

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find  directory -type f -name    in  grep  substring

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To find all the pom xml files in your current directory and print them  you can use   find   -name  pom xml  -print

User · Answer

find  directory -type f -name    in    is a bit shorter than that whole thing  and safer - deals with whitespace in filenames and directory names    Your script is probably failing for entries that don t have a   in their name  making  extension empty

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