Extracting path element to make a string in bash

Question

I'd like to synthesize a string from a directory name in bash. I need to extract the last two path names to make a string.

For example, with an input /a/b/c, I want to make "b_c_HELLO".

How can I do that with bash?

Anton Kovalenko · Accepted Answer · 2013-01-05 15:05:36Z

2

Use basename and dirname:

parent=$(dirname "$input")
output=$(basename "$parent")_$(basename "$input")_HELLO

answered Jan 5, 2013 at 15:05

Anton Kovalenko

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Comments

Vijay · Accepted Answer · 2013-01-05 15:20:52Z

2

echo $PATH|awk -F"/" '{print $(NF-1)"_"$NF"_HELLO";}'

answered Jan 5, 2013 at 15:20

Vijay

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Josh Cartwright · Accepted Answer · 2013-01-05 19:05:36Z

1

A pure bash implementation leveraging Parameter Expansion:

input="a/b/c"
tmp="${input%%/*/*}"
tmp="${tmp#$tmp/}"
output="${tmp/\//_}_HELLO"

answered Jan 5, 2013 at 19:05

Josh Cartwright

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