Getting the file extension

Shell Programming and Scripting
1

I have a file

n06-z30-sr65-rgdt0p25-varp0.25-8x6drw-test.cmod

and I want to get the extension.

At the moment I have

set filextension = `echo $f | awk 'BEGIN {FS="."} {print $2}'`

which of course does not work as there is a point in varp0.25

2

what shell? modern bash:

var=n06-z30-sr65-rgdt0p25-varp0.25-8x6drw-test.cmod
echo ${var##*.}
cmod
3

If your shell has variable substitution, and assuming the extension is supposed to be "cmod"

Then this ought to work:

 
my_file=n06-z30-sr65-rgdt0p25-varp0.25-8x6drw-test.cmod
my_ext=${my_file##*.}
echo $my_ext
cmod
4

I am using csh

I need both the filename and the extension. At the moment it is as below

set filename = `echo $f | awk 'BEGIN {FS="."} {print $1}'`
set filextension = `echo $f | awk 'BEGIN {FS="."} {print $2}'`
5 
#!/bin/csh
set pathvar=/home/WSJ091305.txt
echo $pathvar:r
echo $pathvar:h
echo $pathvar:t
echo $pathvar:e

#
# The result of executing this script is:
#
/home/WSJ091305
/home
WSJ091305.txt
txt
6

You want the last field, which in awk is referenced by $NF.

Regards,
Alister

7

I have done the below to get the file extension.

  set filextension = `echo $f | awk 'BEGIN {FS="."} {print $NF}'`

But what should I do to get the file name?

8

see the previously posted csh specific hints.....

9

Take a look at this thread.

10

I have a string

  set color = "blue/green/gold/black/red/purple/gray"

I want to remove the "/" and repalce it with a space. How can I do it in awk?

11 
[ilan@posts ~]# color="blue/green/gold/black/red/purple/gray"
[ilan@posts ~]# echo $color  | awk '{gsub(/\//," ");print}'
blue green gold black red purple gray

OR you can simply use tr to do that..
[ilan@posts ~]# echo $color  | tr "/" " "
blue green gold black red purple gray
[ilan@posts ~]#

PS: you should have used a new thread instead of combining in old thread. I think, combining threads aren't entertained in forums.

12

Please don't piggy-back threads - start a new thread for a new question....

echo "blue/green/gold/black/red/purple/gray" | nawk -F/ '$1=$1'
13

Hi
You could try something like this

 set color="`echo "blue/green/gold/black/red/purple/gray"|awk -F "/" '{print $1,$2,$3,$4,$5,$6,$7}'`"
14

Oh, ok. Apologies.