filename match based on a known file name

Question

I want a user to input the filename which could be reside at any location but the name of the file is fixed in end .i.e. abc. txt

Let suppose the the user inputs the file name as /usr/test/abc.txt which comes in second positional parameter in my script

I want to make below statement as true how can I achieve this

if [ $2 == ..../abc.txt ]

Thanks, Ruchir

score 4 · Answer 1 · edited Jun 20 '20 at 09:12

4

Let suppose the the user inputs the file name as /usr/test/abc.txt which comes in second positional parameter in my script

I want to make below statement as true how can I achieve this

Use this if condition using shell glob:

if [[ "/$2" == *"/abc.txt" ]]; then
    echo "valid match"
fi

edited Jun 20 '20 at 09:12

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answered Nov 18 '13 at 18:00

anubhava

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This will fail if the $2 argument is simply 'abc.txt' – Arun Taylor Nov 18 '13 at 18:36
@ArunTaylor: Yes I am aware of that and I have just copied the condition from OP's question which had leading `/` – anubhava Nov 18 '13 at 18:38

Arun Taylor · Answer 2 · 2013-11-18T18:21:35.940

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You can use basename to get the last component of the filename.

prompt> cat foo.sh
#!/bin/sh

if [ "abc.txt" == `basename $2` ]; then
    echo "found .../abc.txt"
fi

prompt> foo.sh foo /a/b/c/abc.txt
found .../abc/txt

edited Nov 18 '13 at 18:21

answered Nov 18 '13 at 17:59

Arun Taylor

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This fails if user inputs stuff with spaces or other funny symbols. **Use More Quotes**. – gniourf_gniourf Nov 18 '13 at 18:41

score 0 · Answer 3 · edited May 23 '17 at 11:56

0

if [[ $2 == *"/abc.txt" ]]; then
   echo "It ends with abc.txt";
fi

Why [[ ]] works compared to [ ] is explained here...

"[ ]" vs. "[[ ]]" in Bash shell

edited May 23 '17 at 11:56

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answered Nov 18 '13 at 18:01

iamauser

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You need the '/' otherwise it will match xxxabc.txt – Arun Taylor Nov 18 '13 at 18:34
Please add an explanation as to why you think your code will solve the problem. – rgettman Nov 18 '13 at 19:00

score 0 · Answer 4 · answered Nov 18 '13 at 19:19

0

you could do:

if ( echo "$2" | grep 'abc.txt$' >/dev/null ) ; then ... ; else .... ; fi

or

if ( echo "$2" | grep '/abc.txt$' >/dev/null ) ; then ... ; else .... ; fi

(if you need that "/" too ?)

answered Nov 18 '13 at 19:19

Olivier Dulac

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filename match based on a known file name

4 Answers4