linux shell script: getting filename from a user input string

Question

I would like to write a shell script in which I'll take a line input from user,which will contain some xxx.cpp as filename. I want to get that "xxx" in another variable. e.g.

if user give input as:

some params path/to/file/xyz.cpp more p/ara/ms

I want to get xyz which occurs before".cpp" and after last occurance of "/" before ".cpp"

possible duplicate of Extract filename and extension in bash — n. m. could be an AI
– n. m. could be an AI, Commented Mar 10, 2012 at 19:00
What if the input is "cp/b.cpp/a.cpp.f.cpp/ foo.cpp cpp/cpp.cpp/b.cpp" You need to clarify what you are asking for. — William Pursell
– William Pursell, Commented Mar 11, 2012 at 3:37

khachik · Accepted Answer · 2012-03-10 19:10:01Z

1

Use basename [param] [.ext].

echo `basename $1 .cpp`

where 1 is the index of path/to/file.xyz in the argument list.

edited Mar 10, 2012 at 19:10

answered Mar 10, 2012 at 19:01

khachik

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2 Comments

N D Thokare Over a year ago

I do not get meaning of "index of"..? if I give the input as: [ some params path/to/file/xyz.cpp more p/ara/ms ] what will be the index and how to get it?

khachik Over a year ago

@NDThokare, if it is the complete command-line, where some is the program to run then index of some is 0, index of params is 1 and index of path/to/file/xyz.cpp is 2.

amdn · Accepted Answer · 2012-03-10 21:38:54Z

0

Here's a sample bash script to prompt the user for a list of files and filter all the input and display only the base name of files that end in '.cpp' (with .cpp removed) and which are readable

#!/bin/bash
echo Enter list of files:
read list_of_files
for file in $(echo $list_of_files); do
    if echo $file | grep '\.cpp$' > /dev/null; then
        if [[ -r $file ]]; then
            fn=$(basename ${file})
            fn=${fn%.*}
            echo $fn
        fi
    fi
done

edited Mar 10, 2012 at 21:38

answered Mar 10, 2012 at 19:19

amdn

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2 Comments

N D Thokare Over a year ago

if I run this script, its not taking any input at command line. I want to read input from user and use it to extract filename.

amdn Over a year ago

Ok I fixed it so it would prompt you for input instead of using the arguments to the script

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