Extract file basename without path and extension in bash

Question

Given file names like these    the path foo txt bar txt   I hope to get   foo bar   Why this doesn t work      bin bash  fullfile  1 fname   basename  fullfile  fbname   fname     echo  fbname   What s the right way to do it

User · Answer

Here are oneliners      basename    s         basename    s       s          I needed this  the same as asked by bongbang and w4etwetewtwet

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You don t have to call the external basename command  Instead  you could use the following commands     s  the path foo txt   echo    s       foo txt   s   s        echo    s  txt   foo   echo    s      foo   Note that this solution should work in all recent  post 2004  POSIX compliant shells   e g  bash  dash  ksh  etc     Source  Shell Command Language 2 6 2 Parameter Expansion  More on bash String Manipulations   http   tldp org LDP LG issue18 bash html

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If you want to play nice with Windows file paths  under Cygwin  you can also try this   fname   fullfile             This will account for backslash separators when using BaSH on Windows

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Pure bash  no basename  no variable juggling   Set a string and echo   p  the path foo txt echo    p                Output   foo   Note  the bash extglob option must be  on    Ubuntu sets extglob  on  by default   if it s not  do   shopt -s extglob     Walking through the   p                  p -- start with  p     substitute every instance of the pattern that follows     match one or more of the pattern list in parenthesis   i e  until item  7 below   1st pattern      matches anything before a literal     char   pattern separator   which in this instance acts like a logical OR  2nd pattern     matches anything after a literal     -- that is  in bash the     is just a period char  and not a regex dot    end pattern list    end parameter expansion   With a string substitution  there s usually another   there  followed by a replacement string   But since there s no   there  the matched patterns are substituted with nothing  this deletes the matches    Relevant man bash background    pattern substitution         parameter pattern string            Pattern substitution   The pattern is expanded to produce a pat           tern just as in pathname expansion   Parameter is  expanded  and           the  longest match of pattern against its value is replaced with           string   If pattern begins with    all matches  of  pattern  are           replaced   with  string    Normally  only  the  first  match  is           replaced   If pattern begins with    it must match at the begin-           ning of the expanded value of parameter   If pattern begins with              it must match at the end of the expanded value of  parameter            If string is null  matches of pattern are deleted and the   fol           lowing pattern may be omitted   If parameter is   or    the sub           stitution  operation  is applied to each positional parameter in           turn  and the expansion is the resultant list   If parameter  is           an  array  variable  subscripted  with    or    the substitution           operation is applied to each member of the array  in  turn   and           the expansion is the resultant list      extended pattern matching       If the extglob shell option is enabled using the shopt builtin  several    extended  pattern  matching operators are recognized   In the following    description  a pattern-list is a list of one or more patterns separated    by a     Composite patterns may be formed using one or more of the fol    lowing sub-patterns               pattern-list                   Matches zero or one occurrence of the given patterns             pattern-list                   Matches zero or more occurrences of the given patterns             pattern-list                   Matches one or more occurrences of the given patterns             pattern-list                   Matches one of the given patterns             pattern-list                   Matches anything except one of the given patterns

User · Answer

Just an alternative that I came up with to extract an extension  using the posts in this thread with my own small knowledge base that was more familiar to me   ext    rev  lt  lt  lt     cut -f  1  -d      lt  lt  lt     rev  lt  lt  lt   file docx          Note  Please advise on my use of quotes  it worked for me but I might be missing something on their proper use  I probably use too many

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The basename command has two different invocations  in one  you specify just the path  in which case it gives you the last component  while in the other you also give a suffix that it will remove  So  you can simplify your example code by using the second invocation of basename  Also  be careful to correctly quote things    fbname   basename   1   txt  echo   fbname

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A combination of basename and cut works fine  even in case of double ending like  tar gz   fbname   basename   fullfile    cut -d  -f1    Would be interesting if this solution needs less arithmetic power than Bash Parameter Expansion

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Use the basename command  Its manpage is here   http   unixhelp ed ac uk CGI man-cgi basename

User · Answer

Here is another  more complex  way of getting either the filename or extension  first use the rev command to invert the file path  cut from the first   and then invert the file path again  like this   filename  rev  lt  lt  lt    1    cut -d    -f2-   rev  fileext  rev  lt  lt  lt    1    cut -d    -f1   rev

[linux] Extract file basename without path and extension in bash

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